To see the other types of publications on this topic, follow the link: Plaster molds.
Dissertations / Theses on the topic 'Plaster molds'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Plaster molds.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Těžká, Adéla. "Studium odolnosti povrchových úprav ETICS vůči biotickému napadení." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409773.
Full textAbstract:
This diploma thesis deals with the study of resistance of ETICS surface treatments to biotic attack. The theoretical part elaborates a research focused on biotic attack of facades of buildings insulated by contact insulation systems ETICS. Based on the information obtained during the elaboration of the bachelor thesis and further study, the optimization methodology of ETICS surface treatment resistance to biotic attack proposed in 2018 is elaborated. In the practical part, the proposed methodology is verified, evaluated and recommendations concerning the suitability of using the proposed methodology in construction practice are implemented.
2
Carvalho, Ana Raquel Antunes. "Injecção de polímeros: peças técnicas." Master's thesis, Instituto Politécnico de Bragança, Escola Superior de Tecnologia e de Gestão, 2009. http://hdl.handle.net/10198/2536.
Full textAbstract:
Conceitos como polímeros, injecção de plástico, moldes, PPAP, (Production Part Approval
Process) PPAP, fazem parte do dia-a-dia na Soplast. Um dia-a-dia rodeado de plásticos, um
dia-a-dia cada vez mais semelhante ao nosso. Esta nova era de plásticos – tudo à nossa
volta tem uma pequena componente plástica – ainda tem muito por descobrir e descodificar.
No âmbito da candidatura ao grau de Mestre em Engenharia Química, promovido pela Escola
Superior de Tecnologia e de Gestão de Bragança (ESTIG) do Instituto Politécnico de
Bragança (IPB) foi realizado um trabalho de acompanhamento do desenvolvimento de uma
peça plástica – desde a sua concepção em desenho até à fase final da peça plástica. Estas
fases passam pela definição do molde, escolha da matéria-prima, entrega da documentação
PPAP (oficial e exigida pela norma ISO TS 16949/2002) entre outros pontos. O estudo para
esta tese realizou-se em período de trabalho, na empresa Soplast – Moura, Moutinho e
Morais, Lda.
Este trabalho pretende acompanhar o processo desde a fase de concepção/desenvolvimento
até à fase final de uma peça plástica para a indústria automóvel – peças técnicas. Este
documento pode ser considerado um auxílio para novos colaboradores da Soplast que
podem aprender o modo de funcionamento da empresa e todos os processos de um novo
projecto. Concepts like polymers, plastic injection, mold, PPAP (Production Part Approval Process)
made part of all days in Soplast. Days surrounded by plastic, days more and more similar to
ours. This new time of plastics - everything around us has a small plastic component - still
has plenty to discover and decode.
On application to Master degree in Chemical Engineering, sponsored by Escola Superior de
Tecnologia e de Gestão de Bragança (ESTIG) from Instituto Politécnico de Bragança this
work has been developed - monitoring the development of a plastic part from conception in
drawing until the final stage of the plastic part. These phases pass to definition of the model,
choice of raw materials, delivery of PPAP documentation (official and required by ISO TS
16949/2002), and others. The study for this thesis took place in working period in company
Soplast – Moura, Moutinho e Morais, Lda.
This work intends to follow the process from the design/development phase until the end of
a plastic part for the automotive industry - technical parts. This document may be
considered as aid for new employees that Soplast can have - they can understand how
Soplast work in different departments.
3
Prince, Leland Fred. "Leland F. Prince's Earth Divers." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2085.
Full textAbstract:
My stoneware sculptures in my MFA final project were named Earth Divers because clay as a material is earth and clay is also symbolic of the Earth. The way that I physically dive into clay up to my elbows is a poetic performance. The sculptures were built in sections horizontally and then stacked vertically. I began the process by first making life size plaster molds of the human figure taken from live people. Earth Divers take their architectural structure specifically from the organic curves of the negative voids that are characteristic of the plaster figure molds. I built into these plaster molds a block or brick like section. I then removed the large block sections from the molds and stacked the sections one on top of the other combining the figurative and architectural structures with gothic influence. The sculptor, Stephen De Staebler, who works in a similar fashion, describes his work as, "... first laying the figure down and later standing it in a vertical position." The way of life that was lost with the manufacturing past of my family at Castone Brick is found in the use of industrial nostalgia by modeling I-beam shapes as part of the structure of the stacked sections. I also fired nuts, bolts, and washers of various sizes in the clay that build the surface of the human forms. The square nut seen in my work is no longer being manufactured and is symbolic of the passing of the industrial age in America. Finally, to build the surfaces of my sculptures I used slips, glazes, and a variety of clays on top of clay, and laid glass fragments on the horizontal surfaces to create a look of pooled water when my work was fired similar to what I have seen in the Lehman Caves in Baker, Nevada. "I believe there is a force in this world that lives beneath the surface, something primitive and wild that awakens when you need an extra push just to survive, like wild flowers that bloom after a fire turns the forest black. Most people are afraid of it and keep it buried deep inside themselves. But, there will always be a few people who have the courage to love what is untamed inside us." (Tim McGraw)
4
Michalčák, Jan. "Výroba součásti z plastu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228395.
Full textAbstract:
The project elaborated in the frame of engineering studies branch N2307-00 is submitting design of a product from plastic from material PP GF30. In the frame of literal study there are summarized technical knowledge from the area of plastic processing. On its base there is selected and specified technology of plastic injection and costruction of injection mold. Thesis is further dealing with the construction of injection mold, which is solved as a 1+1 multiple with the use of side sliding flank cores. During the course of the tool construction there were used standardized elements of Hasco company. The tool will be fixed by the use of Arburg ALLROUNDER 320C injection press. In the conclusion of the thesis there are verified necessary strenght of the mold and basic production cost analyses.
5
Kočí, Ivan. "Návrh technologie výroby zátky z plastu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228882.
Full textAbstract:
This graduation theses analyse a concept of plastic plug production using the technology of injecting plastic into the form. There is performed a design of the technologic process with necessary calculations included here. Besides that the analysis is also focused on construction of the injection form. For the solution the 3D CAD system by SolidWorks and Hasco, Meusburger, Synventive normals were used. The graduation theses is finally valorized by technological-economic summary.
6
Špičák, Pavel. "Technologie výroby součástí z plastu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229768.
Full textAbstract:
The project developed in terms of engineering study of field N2307- 00 Engineering Technology submits a design of components from plastic production technology- cover on the table. The introductory part of this study describes characteristics, division and possible plastics processing. The work consists of production technology proposal (injection into metal mold) and its construction solution. The another part proposes suitable injection material and verification of injection machine. The final part of work consists of financial evaluation of injection process, appropriate blue prints and appendices.
7
Bartlett, Leah Paige. "A Preliminary Study of Using Plastic Molds in Injection Molding." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1509440406290043.
Full text
8
Václavek, Jiří. "Výroba součásti "KRYTKA"." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230083.
Full textAbstract:
The theory of plastic injection molding technology together with procedure of designing injection molds is elaborated in this master thesis. Also, the technology of production is designed, derived from assigned component „cover“ analysis affirmed by necessary calculations. On the bases of these calculations, injection machine fitting requirements is chosen. Then injection mold is designed for the assigned component. Simulation of injection is performed for this mold using Autodesk Inventor 2011 and its module Moldflow and then results are thoroughly analyzed. Economical evaluation for this component is then executed towards the end of the thesis.
9
Vrátný, Martin. "Návrh technologie výroby závitové koncovky z plastu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318751.
Full textAbstract:
This diploma thesis submits a proposal of technology design manufacturing threaded plastic ends. In the first part it deals with literary studies of plastics and plastic injection molding. In the second part is the design of an injection form for the specified component. Part of the practical part is also the right choice of material and the injection mold, which was designed based on the calculations of technological parameters. In the conclusion of this thesis is technical economic evaluation.
10
Žváček, Michal. "Automatize návrhu jednoduchých vstřikovacích forem pro nástrojárny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228174.
Full textAbstract:
The dissertation is concerned with automatization proposal of simple injection moulds for plastics. The dissertation is concentrating on the process of CAD design with the aim of make it more effective and automate by the help of 3D parametric strickle board of moulds. It serves for rapid proposal of basic mechanism of the tools. Strickle board of the mould is managed by length of side moulding plate in required range from 300 to the 700mm. For managing of standardized parts was created web portal, which includes database of single parts. These parts can be simply insert to the groups of moulds by the help of hypertext links in software Catia V5. Dissertation includes description of whole system automatization and matching of the new way of CAD design with the original.
11
Čajan, Tomáš. "Technologie výroby plastového stínítka lampičky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254411.
Full textAbstract:
This master thesis deals with design of injection molding technology for plastic lamp shade made of polycarbonate labelled Lexan 925. The injection is performed into injection mold with hot runner system. Initially there is a general study related to plastic materials and injection molding technology. Further the study continues with technological solution of production of the lamp shade. The designed injection mold is two-plate, double cavity mold with two hot nozzles and is equipped with a thread-unscrewing machine. This thesis contains part of the documentation and item list of the injection mold, along with technical-economical evaluation of the developed solution.
12
Hejl, Dušan. "Technologie výroby plastového kontejneru na náboje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229140.
Full textAbstract:
Dissertation deals with solution of production of set component „plastic porter for ammunition“. Component is made from high-density polyethylene with business marking LITEN ML 77, suggested series of 3 000 000 pieces. On the basis of literary study of plastics injection problems and necessary calculations, there was proposed injection form. This form is solved by means of normalised components from company Meusburger. There was chosen injection machine from company Arburg Allrounger 370 S 700 – 170.
13
Ngonda, T. N. "A critical review of literature on cooling of injection moulds." Interim : Interdisciplinary Journal, Vol 6, Issue 2: Central University of Technology Free State Bloemfontein, 2007. http://hdl.handle.net/11462/409.
Full textAbstract:
Published ArticleThe paper presents a critical review of the techniques that are used to cool plastic injection moulds. It examines research on cooling of injection moulds by conventional cooling, the benefits and the limitations of the method. It compares the deployment mechanisms that have been proposed by various researchers. It also examines how the various mechanisms affect the plastic cooling rate and the overall heat transfer performance of the mould and how the various deployments affect the stress distribution of the mould and mould durability. The paper also presents the possibilities that have been presented by rapid prototyping. It discusses the development of conformal cooling as an alternative to conventional cooling. It presents the state of the art on the method. The paper presents the deficiencies in the current theories on conformal cooling and suggests areas that require further work in order to fully exploit the technique.
14
Vrána, Petr. "Technologie výroby plastového dílce světlometu automobilu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231473.
Full textAbstract:
Diploma thesis which is developed for the master’s degree program (M2I – K Mechanical engineering) presents a proposal solution for production technology plastic car headlins parts from polymer material PBT GF30. Literature review summarizes the findings of thermoplastic injection technology and the structural design possibility of injection molds. The paper examined two variants of the running system, which are suitable for production of injection molding components. Finaly, after technical - economic assessment, we came to the conclusion that the better option is to use the hot runner system. In the practical part is the specified product modeled by the help of 3D software and the injection mold was designed. The design was implemented by CATIA V5 R20. For the design and manufacture of injection mold were used normality from MEUSBURGER. For the chosen alternative technology of production were made calculations and was selected injection molding machine Electron 75 – 300 from FERROMATIC.
15
Hovad, Jan. "Návrh technologie výroby plastového krytu vrtačky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231261.
Full textAbstract:
This thesis contains literary studies about plastics and injection of plastics including tools for the injection. Practical part of the thesis is focused on design manufacturing of plastic cover of drill. Manufacturing parameters, design construction of injection form, selected injection machine and technical economic evaluation are solved within the manufacturing proposal.
16
APPASAMY, SREERAM. "DEVELOPMENT OF HIGH THROUGHPUT PLASTIC MICROLENSES USING A REPLACEABLE INJECTION MOLD DISK." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1069880094.
Full text
17
Silva, Aparecido Rodrigues da. "Confecção e caracterização óptica e estrutural de lentes plásticas obtidas pelo processo de injeção." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-20102010-100921/.
Full textAbstract:
O propósito desse trabalho foi o de produzir lentes biconvexas pelo processo de injeção para serem utilizadas no ensino de óptica geométrica e de ciências nos níveis fundamental e médio. A importância de tal trabalho se justifica na carência de material experimental didático produzido no mercado nacional. Para atingir os objetivos propostos, foi necessário estudar o processo de injeção de termoplásticos e adequá-lo à produção de um componente óptico. No desenvolvimento do trabalho, foi projetado e confeccionado um molde para injeção das lentes, segundo especificações técnicas e apoiado em resultados obtidos através de simulações numéricas. Após a realização de testes de injeção, seguiu-se a caracterização das lentes obtidas através de parâmetros ópticos: transparência, birrefrigência, índice de refração, distância focal, raio de curvatura e FTMThe purpose of this work was the development and production of acrylic biconvex lens by injection process to be used in optical and science teaching at elementary and high schools. The importance of such work is based in the deficiency of experimental didactic material made in Brazil. In order to achieve the intended objective it was necessary to study the thermoplastic injection process and adapt it to the fabrication of an optical element. During the development of the work a mold was designed and constructed in according to technical specifications and based on results of numerical simulations. After the injection tests the lens were characterized by theirs optical parameters: transparency, birefringence, refraction index, focal distance, curvature radius and MFT
18
Popelka, Jan. "Návrh technologie výroby závěsu z plastu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228861.
Full textAbstract:
The aim of my graduation theses is to work up the literature search of polymer processing. To give a short summary of their structure, characteristic and fabrication technique. Then to make a structural design of injection mold for producing the scheduled aim and motivate this design with requisite calculation for construction of the tool, a choice of injection machine and rundown of injection cycle. At the end of my work is this aim economically reviewed and compared with alternative form of structural design.
19
Tišnovský, Jakub. "Návrh a výroba vakuové formy pro sériové tváření plastů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402538.
Full textAbstract:
This diploma thesis deals with the proposal and production of a mold for series production of plastic parts by vacuum forming. The thesis is divided into 2 main chapters. The theoretical part includes analysis of chip machining technology. The experimental part focuses on solving the design of the mold in PowerShape software, a detailed analysis of making of the model for casting and about making of the mold themselves. In the last part the manual completion and verification of the mold is discussed. Thesis is terminated by technical-economic evaluation, in which is discussed about production costs.
20
ÝR, ÓTTARSDÓTTIR EVA. "Egenskaper hos stärkelse-lignosulfonatblandningar för möjlig användning som livsmedelsförpackningar." Thesis, KTH, Skolan för kemivetenskap (CHE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172450.
Full textAbstract:
The demand for bio-plastics is constantly growing, due to the increasing use of synthetic plastic, their non environmentally friendly properties and long degradation time. This thesis explored the possibility to use starch-lignosulfonate mixtures for food packaging. Films are prepared from potato starch and two different types of lignosulfonates, calcium and sodium respectively using mold casting. The films are compared to pure potato starch films in respect to their mechanical properties and moisture absorption. Characterization of the films is also conducted using scanning electron microscopy, energy-dispersive X- ray spectroscopy and light microscopy to see the interaction between the potato starch and lignosulfonates. The tensile test reveals that neither of the lignosulfonates do have a plasticizing effect on the potato starch films. The energy-dispersive X-ray spectroscopy conceded that the lignosulfonates are homogeneously dispersed throughout the film both on the surface and cross section. The moisture absorption test showed that the uptake of water does not decrease by adding lignosulfonates to the potato starch film. From these results it can be concluded that it is possible to produce films from potato starch and lignosulfonates in various ratios. But the potato starch:lignosulfonate films are not a viable option for food packaging due to their brittleness and high moisture uptake.Efterfrågan på bioplast växer ständigt på grund av den ökande användingen av syntetiska plaster, deras icke miljövänliga egenskaper och den långa nedbrytningstiden. Denna avhandling undersöker möjligheten att använda blandningar av stärkelse-lignosulfonat i livsmedelsförpackningar. Potatisstärkelse och två olika typer av lignosulfonater med kalcium och natrium användes för att tillverka filmer genom formgjutning. Filmerna jämförs med filmer med ren potatisstärkelse, med avseende på deras mekaniska egenskaper och fuktabsorption. Karakterisering av filmerna genomförs även med hjälp av svepelektronmikroskop, energiröntgenspektroskopi och ljusmikroskopi för att se interaktionen mellan potatisstärkelse och lignosulfonater. Dragproverna visar att ingen av lignosulfonaterna har mjukgörande effekt på potatisstärkelsefilmerna. Energiröntgenspektroskopin visade att lignosulfonaterna är homogent dispergerade i hela filmen både på ytan och i tvärsnittet. Fuktabsorptionstestet visade att upptaget av vatten inte minskar genom tillsats av lignosulfonater i potatisstärkelse-filmen. Från dessa resultat kan man dra slutsatsen att det är möjligt att framställa filmer från potatisstärkelse och lignosulfonater i olika förhållanden. Men potatisstärkelse: lignosulfonatfilmer är inte ett hållbart alternativ för livsmedelsförpackningar på grund av sin sprödhet och höga fuktupptagning.
21
Ribeiro, Paulo Sérgio. "Desenvolvimento de um novo aço para moldes de plástico." Universidade Presbiteriana Mackenzie, 2010. http://tede.mackenzie.br/jspui/handle/tede/2747.
Full textAbstract:
Made available in DSpace on 2016-04-18T21:36:01Z (GMT). No. of bitstreams: 3
Paulo Sergio Ribeiro1.pdf: 2109374 bytes, checksum: 1ff4b8a7334397d794c09c418079e776 (MD5)
Paulo Sergio Ribeiro2.pdf: 3132872 bytes, checksum: 48f547e687886b7890e80ec7a490f153 (MD5)
Paulo Sergio Ribeiro3.pdf: 2689619 bytes, checksum: 98d138df083b0e4eea2c480703b1c714 (MD5)
Previous issue date: 2010-01-26Uma nova liga a base de ferro (aço) para moldes plásticos foi obtida com características melhoradas quando comparada aos materiais usualmente utilizados no mercado. Os materiais, existentes no mercado, usados como referência neste trabalho, também não são indicados para utilização que necessitem acabamentos especiais. Para aplicações de uso restrito ou que requeiram acabamentos especiais, como texturização, por exemplo, outros testes, teriam que ser realizados. Com estas características atingiu-se melhor produtividade do molde, opções de menor custo, dependendo da variação de custo de liga, no mercado internacional, bem como uma redução no consumo de energia na produção das peças, por conta da melhoria da condutividade térmica. Como resultado deste trabalho atingiu-se a manutenção das características mecânicas quando comparado aos aços equivalentes comerciais em uso, obtendo ganho expressivo em condutividade térmica. Também foi obtida a possibilidade de obter-se um aço com estrutura compatível com a aplicações do aço DIN 1.2738 até 600 mm de espessura, com menor adição de elementos de liga.
22
Petrucha, Roman. "Návrh technologie výroby šnekového soukolí z plastu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318849.
Full textAbstract:
The master thesis deals with the design of the injection mold for the production of a plastic two-part worm which is part of the worm gear set in the sleeve. From the beginning, an analysis of the assigned component was performed, specifying its function and specifying the criteria that must be met by the component. In addition, design of the production technology (injection molding) was carried out, followed by theoretical analysis of plastic materials, injection molding technology and mold design. Subsequently, in the practical part, a complete design of the injection mold was made on the basis of simulations and technological calculations. On the basis of the parameters of the injection mold, a machine was chosen, on which production should be carried out according to the proposed technological procedure. The conclusion of the thesis contains a technical and economic evaluation of the proposed technology for the production of Plastics splatter component.
23
Stavárek, Václav. "Optimalizace jádra formy na vstřikování plastů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400449.
Full textAbstract:
Diplomová práce vznikla ve spolupráci s průmyslovým partnerem, který vyrábí elektrické komponenty pro automobilový průmysl. Tato firma se potýká s problémy často se porušujících jader v některých jejich formách na vstřikování plastů, vyrábějících převážně housingy pro konektory. Firma disponuje licencemi na komerční software pro simulaci injekčního vstřikování Moldflow a Moldex3D a také pro simulaci metodou konečných prvků Ansys. Nejprve jsou shrnuty teoretické poznatky ohledně injekčního vstřikování a jeho simulace, řešení problémů interakce těles s tekutinou a únavy materiálu. Poté je popsán proces stanovení únavové životnosti jádra formy s využitím výše zmíněného softwaru. Proces je vysvětlen na příkladu konkrétní formy ve výrobě této firmy. Je zvolen takový přístup vyhodnocení únavy, který nejvíce odpovídá současné životnosti jader, a ten je pak použit pro analýzu vlivu změny geometrie jádra a parametrů vstřikování. Změny ostatních parametrů, které simulace neumožňuje zahrnout, jsou rovněž navrhnuty a pokud možno odůvodněny jinými způsoby. Jedno z doporučení je přidání zaoblení na obě jádra, což by mohlo prodloužit životnost toho problematičtějšího z nich z 30 dnů na více než 320 dnů. Toto by mohlo znamenat úspory až 10 600 EUR ročně. Další doporučení je změnit způsob obrábění jader a také přidat jejich tepelné zpracování.
24
Rosa, Jakub. "Výroba tvárníku formy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318752.
Full textAbstract:
The meaning of the diploma thesis is to create a new mold plunger for injection mold using a suitable method according to the original mold plunger. The final mold part should meet the required surface parameters. The work is focused on the analysis of the original mold plunger and the experimental verification of suitable methods of production of the equivalent mold plunger.
25
Pokorný, Martin. "Technologie výroby plastového krytu zásuvky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228400.
Full textAbstract:
This project concentrates on the technology of manufacturing of the plastic socket outlet. It consists of two parts, where the first part is a literature study. Here are described the characteristics of the materials and their specifications. Further on is described basic knowledges technical methods of injection and some other technologies. The second section consists of the right proposal of the material. Further on in this section is described technological treatment. Mechanical function and its design and technical drawing are a part of this second section. As a final result is a brief comparison of the technology between the injection or pressing into molds. Herewith is also included a simplified financial budget calculation.
26
CHEN, YEN-HAO, and 陳彥豪. "Study on the Use of Be-Cu Alloy Mold Inserts in Plastic Injection Molds for Aspheric Optic Lens." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/43670791566728250882.
Full textAbstract:
碩士國立臺灣大學
機械工程學研究所
94
For the molds of optical lenses, ultra-precision machined mold inserts are required. Most of the mold inserts are machined by a single-point diamond (SPD) turning of electroless nickel deposit on tooling material. Since the preparation procedure makes the nickel deposit expensive and time-consuming, other materials for rapid tooling during development are demanded. In this study, Be-Cu alloy which can be SPD machined is explored. This study is devoted to investigating the use of the Be-Cu alloy mold insert in plastic injection molds for aspheric optic lens. In the first part of this study, the effects of the molding conditions on the oxidation of mold inserts are experimentally investigated. The parameters include mold temperature, melt temperature and injection speed; the materials include PS, PMMA and COC. The oxidation degree and surface roughness of the Be-Cu inserts as function of injection counts are measured and analyzed. To reduce the oxidation, blowing nitrogen into mold cavity and depositing Ni-P-PTFE on the insert surface are attempted. In the second part of this study the effects of the conditions on the molding quality of aspheric optic lens using a Be-Cu insert in the injection mold. Taguchi’s method is employed to evaluate the significance of different processing condition on the quality of molded parts. Form errors of molded parts measured by the surface profiler and residual stresses measured by photo-elasticity are used to evaluate the molding quality. The results indicate that melt temperature is the major factor to influence mold oxidation rate, and injection speed and mold temperature are next in importance. There is no obvious change of the oxidation behavior in Be-Cu mold insert when using different material in the same molding conditions. The differences in the change of surface roughness in the first 250 injection counts are less than 7~8 nm. When the injection counts exceeds 1000, micro crack can be observed in the mold surface. Thus the molded optic lens can not be used. The XPS analysis show that Cu2O is the primary constituent on the surface of the mold insert. Blowing nitrogen onto cavity surface has no significant effect on reducing oxidation. On the other hand, Ni-P-PTFE deposit can prevent the oxidation perfectly. The differences between the profiles in mold insert and molded parts are used to evaluate the molding precision. Mold temperature and packing pressure are found to be the principle factors affecting the molding precision. Higher mold temperature and packing pressure result in better dimensional precision. The molecular orientation and residual stress are compared with aid of birefringence observed with polariscope. Molded in a fan-gated mold, it is found that the lenses molded with higher mold temperature yield less orientation and residual stress. Molded in a rectangular-gated, lenses molded with higher meet temperature yield less residual stress. Over-packing causes drastic disturbance to molecular orientation and results in poor molding quality.
27
Yang, Hsin-yu, and 楊欣瑜. "Parametric Design of Plastic Molds for Light Guide Plate." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/xchc2f.
Full textAbstract:
碩士國立臺灣科技大學
機械工程系
95
The objective of this thesis is to develop a parametric design system for making of plastic molds of light guide plates (LGP). It is expected that the introduction of such a system would enable a product designer to focus on expressing his/her expertise in LGP design, without worrying about the subsequent tasks of plastic molding and detailed drafting. Primary research issues addressed in this thesis include: (1) use the scheme of top-down design in Pro/ENGINEER to create the geometric models for both mold cavities and mold plates, (2) employ the concept of “master assembly” to achieve the function of automatic design of mold cavities in response to the size change of LGP, and (3) introduce Microsoft Access and relevant techniques to build the data base of mold base for making of LGP products. As for system implementation, Microsoft Foundation Class of Microsoft Visual C++ and Pro/Toolkit of Pro/ENGINEER are used in this research to develop the proposed system. In addition, activeX data object (ADO) is adopted as the main technique for implementing the data base of plastic mold base. An LGP designer simply inputs (or edits) design parameters via graphical user interface, and the implemented system functions to generate the geometric models of core, cavity and numerous mold components in minutes. After that, a mold designer can select an appropriate type of mold base and the system uses the ADO technique to access and manipulate the data base in order to present mold plates per requested. In the end, the complete set of plastic mold is illustrated on the screen.
28
Hsu, Sho-Tsun, and 徐碩村. "A Study of Global Arrangement – Plastic Injection Molds Industry." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/81169974425393584252.
Full textAbstract:
碩士國立政治大學
經營管理碩士學程(EMBA)
95
Country selection, entry strategy and value-added activites are all key elements regarding successful global arrangement. By observing the global arrangements of firms with regard to value chain concept, this research emphasizes on probing into the strategic structure and phases of competititors' global arrangements within Plastic Injection Molds industry. In practice, this research provides reference materials concerning global arrangement to both competitors within Plastic Injection Molds industry and others with similar niches and industrial characteristics. At first, this research arranges related lectures regarding global strategy, motivations for globalization, strength and weakness of competence, strategic alliance. With the above basement, the article considers the characteristics of Plastic Injection Molds industry, and then determines the whole structure further. By reviewing the interviews of case companies and arranging secondary information, the research concretely describes the process and phases with regard to global arrangement, and the specific strategic structure when it comes to Plastic Injection Molds industry. After cross-comparing case companies, this article concludes the following finding: 1. The adopting strategic structure within Plastic Injection Molds industry when global arrangement is considered When companies attempt to enter their targeted international market, they ought to fully examine their motivations for globalization (both actively and passively), and strength&weakness of competence (factors such as strategy alliance, intangible and tangible resources) so as to determine their global arrangement. 2. The revealing phases whitn Plastic Injection Molds industry when global arrangement is considered When companies start their global arrangement, country selection includes the main area (Taiwan, China, and USA), secondary area (Japan, Germany, England and French) and other area; entry strategy selection includes internal activities, sub-companies, agencies (representative included), investing forms (such as joint venture, merge and acquisition), strategic alliance (integration, alliance, cross marketing, and consignee&trader) and exporting forms. Arrangement for value-added activities include marketing, project management, Research & Development, raw material procurement, production, mold outsourcing, molding, check and accept, sales, after service, injection molding, painting, and assembly. The revealing phases regarding global arrangement could be generally categorized into three types: High-Proportion Foreign Investment Strategy (value added activites seem to be both regional dispersed and well coordinated), Simple Global Strategy (value added activites are gathered within one country to serve the whole world's needs, also well coordinated), and Exporting Strategy (value added activities are gathered and Marketing & Sales are enforced extensively). 3. The practical meaning within Plastic Injection Molds industry when global arrangement is considered When the purpose of companies is to grasp new markets, they should adopt the most suitable entry strategy (such as sub company, agency, investment, strategic alliance, export) to build their downstream value-added activites (such as marketing, sales, and customer service) directly in the target market (such as USA in North America, Germany in Eurpoe, and Japan in East Asia) which takes account of price, quality, delivery, and service. When the purpose of companies is to gain resources or adopt low-cost strategy, they should adopt the most suitable entry strategy (such as sub company and investment) to build their upstream (Research & Development, raw material procurement, production, mold outsourcing, molding, and check and accept) in China so as to gain potential market.
29
Hsieh, Jen-Tse, and 謝仁澤. "A Study On The Development Of Precise Plastic Injection Molds." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/21569660987500768134.
Full textAbstract:
碩士國立臺灣大學
工業工程學研究所
92
This paper carries out a systematic study on the development of precise molds for plastic injection production. Not only the development technologies are investigated but also the engineering process and management. Based on the comprehensive study, this paper presents a structured development procedure that adopts various engineering and management techniques to improve the contemporary molding techniques for the development of high precise plastic molds. Concurrent engineering, process reengineering, CAD, CAM, molding standardization, project review, failure mold analysis, etc. are incorporated in this procedure, and information management is adopted as well. To practice the proposed procedure, a precise mold development for a fine pitch plastic connector is carried out following the procedure. Result shows that the proposed procedure can enhance the development of precise molds in shortening the development time, increasing mold quality, and reducing the development cost.
30
Wu, Po-Shien, and 吳柏賢. "The Mold Flow Analysis and Case Study of Plastic Mold." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/25k77j.
Full textAbstract:
碩士崑山科技大學
機械工程研究所
96
As the economy grows up and national income increases in Taiwan, people need requirement in substance more and more. According the mould is used in multipurpose way and demand is growth, we figure out that the business is increasing. It is valuable to study the mould industry environment and observe its development. The mould industry of Taiwan is now facing a competitor from China. It is more and more difficult to extend the market. The most effective way is to adjust marketing plan and creative new product to oppose China or other nations. The mould industry of Taiwan has to improve its professional skills, enhance the channel marketing and educate R&D and aware itself strength and weakness. The industry has to be more diversification in business marketing and develop R&D department and creative more valuable in product. It is the more worthy way to help the mould industry in Taiwan. The main purpose of this study was to make and design the mould process and discuss the advantage of the mould industry. In terms of theoretical foundational analyzed to figure out the capability, composition and permanence of the mould industry in Taiwan and collected those analyze data to be the studying resource. This research was selected an industry which is called “SportsArt Fitness”to be our model to help us analyzing the business tactic. The major conclusions were： First, the mould industry of Taiwan is well-known in product quality and creativity ability. It is the high additional value to expand the market to the world and also to gather and manage the supply chain to increase the product quality and raise competitiveness. Taiwan has the most strength skills in making mould industry. Secondly, the global regional economy grows fast and each mould industry of Taiwan has to figure out the most suitable tactics and develop the most valuable market business for itself and oppose the variable global mould market. This study emphasizes on the mould industry developing for Taiwan and contributes to the establishment of mould development in Taiwan.
31
Yang, Zhi-Hong, and 楊智鴻. "Mold Flow Simulation for Plastic Magazine." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/92048962082020233902.
Full text
32
JHAN, WEI-SHENG, and 詹為盛. "Mold Flow Analysis for Plastic Glasses." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/47322802938486203144.
Full textAbstract:
碩士高苑科技大學
機械與自動化工程研究所
104
Abstract In this paper, using Moldex3D mold flow analysis software, analysis of plastic glasses. Plastic glasses material is selected Moldex 3D material library PC CALIBRE 302 5 DOW and PMMA ACRYREX CM205 CHI-MEI, progress in the use of the gate and into the gate at a different gate and materials analysis. Materials analysis process, PMMA ACRYREX CM205 CHI-MEI progress gate volumetric shrinkage, X warp direction, Y direction warp, Z warp direction, optimum residual stress; PC CALIBRE 302 5 DOW Further progress gate Total the amount of displacement warping best. In terms of data flow analysis in comparison, motivated gate will gate into good ratio, the material PMMA ACRYREX CM205 CHI-MEI will PC CALIBRE 302 5 DOW good ratio.Keywords：Plastic Glasses , Volumetric Shrinkage , Residual Stress
33
Jahan, Suchana Akter. "Optimization of conformal cooling channels in 3D printed plastic injection molds." Thesis, 2016. http://doi.org/10.7912/C2V354.
Full textAbstract:
Indiana University-Purdue University Indianapolis (IUPUI)Plastic injection molding is a versatile process and a major part of the present plastic manufacturing industry. Traditional die design is limited to straight (drilled) cooling channels, which dont impart optimal thermal (or thermos-mechanical) per- formance. Moreover, reducing the cycle time in plastic injection molding has become significantly important to the industry nowadays. One approach that has been pro- posed is to use conformal cooling channels. With the advent of additive manufacturing technology, injection molding tools with conformal cooling channels are now possible. However, optimum conformal channels based on thermo-mechanical performance are not found. This study proposes a design methodology to generate optimized design configurations of such channels in plastic injection molds. Numerical models have been developed here to represent the thermo-mechanical behavior of the molds and predict the stress and cooling time. The model is then validated experimentally and used in conjunction with DOE (Design of Experiments) to study the effect of differ- ent design parameters of the channels on the die performance. Design of experiments (DOEs) is used to study the effect of critical design parameters of conformal channels as well as their cross section geometries. These DOEs are conducted to identify op- timal designs of conformal cooling channels which can be incorporated into injection molds that are used to manufacture cylindrical and conical shapes of plastic parts. Though these are simplified forms, the study provides useful insight into the poten- tial deign parameters for all kind of injection molds.Based on the DOEs, designs for best thermo-mechanical performance are identified (referred to as ”optimum”). The optimization study is basically a trade-off and the solution is based on a specific sample size. This approach is highly result-oriented and provides guidelines for selecting optimum design solutions given the plastic part thickness.
34
吳國嘉. "Artificial Neural Network for Plastic Injection Mold." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/nt6746.
Full textAbstract:
碩士建國科技大學
自動化工程系暨機電光系統研究所
106
It is due to the requirements for fast and precision for plastics. A series of design and setting parameters is important for clients and productivity programming. This study employed software, MODEX 3D, to simulate flow to evaluate a design with multi-pore. The Taguchi method make use of a table including a few factors including crew material temperature, injection pressure, packing pressure, packing time and mold temperature. Through the optimization of the above factors and modeling, the procedure was established.
35
Hsu, Shu-han, and 許淑涵. "Development of plastic molds and imprinted materials for micro/nano imprint lithography." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/39720775600011730199.
Full textAbstract:
碩士國立高雄大學
化學工程及材料工程學系碩士班
97
The study focusing on the development of nano/micro imprinting techniques and their applications included three major parts: fabrication of imprinted molds, development of alternative imprinting process, and design of imprintable materials. Two imprinting molds were fabricated: one was plastic hybrid mold and the other was ordered porous mold. In the building of plastic hybrid mold, a design using the protruded area with a thin layer of metal to mask the UV light to prepare a residual layer-free pattern. Three materials were tested as the masking layers: carbon black, electroless plated silver, and deposited gold. As limited in the size of carbon black, the plastic hybrid mold with more than 20 um lines was successfully fabricated. Another silver deposition on the protruded area was achieved by immobilizing a layer of tin salt as a reduction coating. However, the tin layer did not homogeneously and selectively bind to the protruded area of plastic molds, giving a failure deposition on the molds. The direct metal transfer techniques was conducted by using different adhesion work for those contact interfaces to stick and remove the protruded gold layer (negative type) or leave the protruded gold layer (negative type). The metal layer transfer was achieved for a 170 nm featured pattern in a 1.5 cm × 1.5 cm area, while the gold particle transfer technique was able to transfer few hundreds nanometer featured pattern in area of 4 cm diameter. Sintering process at a low temperature (150℃) was performed to stable the layered gold nanoparticles on the protruded area. However, heterogeneous distribution of particles was found after 2 hr of sintering. On the other hand, an ordered, self-assembly of composite film was prepared as a nanoporous mold. We synthesized poly(St-BA-AA) emulsion to blend with silica sol prior to coat and dry the composite, giving a large-areaed polymer film with ordered nanopore arrays with 340 nm of pore diameter, 400 nm of spacing, and 2.2 nm of depth. As for the development of imprinting process, we designed a novel water-based imprint process and its application to imprint an organic/inorganic composite. The process is available for imprinting variety of polymers which can be dispersed or emulsified in water, without using organic solvent, high temperature, heavy pressure. A recipe was tested as a water-based Epoxy prepolymer blended with base-catalyzed tetraethoxysilane precursor, giving a transparent 800nm featured pattern. Another test was conducted to fabricate a nonresidual layered pattern, owing to low viscosity of water-based imprintable recipe. In the design of imprintable materials, a novel UV-curable resist was explored for its two staged irradiation and curing. Using the UV resist, the hierarchical structure was able to build up and its depth was increased to ~523.6 nm without collapse the first micron featured pattern.
36
LinChien-Feng and 林建鋒. "Measurement of Mold Clamping Force in Plastic Injection." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/56077596315563451224.
Full textAbstract:
碩士崑山科技大學
機械工程研究所
95
In plastic injection, the uneven distribution of clamping force will result in deckle edge and plastic material leak from mold cavity. Because of progressively high quality requirement in plastic product, therefore, it is important to develop an in-situ clamping force monitor system for plastic injection. At the moment, the clamping force monitor system is not popular that the main reason is the skill and cost price. There are four tie bars in an injection machine, when the mold and die do not properly assemble in the injection machine that will lead to an uneven distribution of clamping force, i.e., the four tie bars have differing tensile stress. The clamping force should be larger than the mold pressure times mold cavity area. Two kinds of clamping force monitor systems were researched and developed in the study. The first one is strain gauge system, which is a traditional method for measurement of strain, but some problems have need of resolution as it applies to the clamping force measurement. The second system is the optical level sensor for clamping force measurement that allows direct observation of strain and can be used repeatedly. Considered the strain of the optical level sensor measurement is the key factor in our design.
37
Hsieh, Min Yi, and 謝岷宜. "Ultraviolet Soft-Mold Lithography for Flexible Plastic Substrates." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/06419816212780950851.
Full textAbstract:
碩士國立彰化師範大學
機電工程學系
95
The thesis studies soft ultraviolet nanoimprint lithography (soft UV-NIL). Isopropanol (IPA) is used to dilute photo-curing resin (U-451D) in order to replace a more expensive UV-curable materials, such as LR8765(BASF AG). At room temperature and low-pressure (<1.5bar), the polydimethylsiloxane (PDMS) with the flexible and transparent advantages is imprinted on the plastic substrate, polyethersulfone (PES). The nano patterns with high fidelity are obtained without complex processes. On the other hand, the soft-mold nanoimprint technique is used to imprint the thermoplastic resist NXR1010 on the plastic substrate PES under high temperature and low pressure conditions. The soft UV-NIL developed has the advantages of short process time, simple operation, room-temperature fabrication. At room temperatures, the soft UV-NIL does not deform the substrate and exhibits stable process and high throughput. On the other hand, although the soft-mold nanoimprint technique has the disadvantages of time-consuming heating and cooling, the air bubbles are effectively reduced and the resolution and yields are improved. 400nm line structures and 1um pillar structures on plastic substrates are achieved. These structures can be applied to the microfluidics, flexible displays, and biomedical sensors.
38
張益裕. "Study of Pressure Monitoring for Plastic Injection Mold." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/08420927790557715555.
Full textAbstract:
碩士國立彰化師範大學
電機工程學系
101
The success Rate of thermoplastic injection molding depends on mold temperature and pressure of injection machine. High defect rate and incomplete product due to insufficient mold temperature and unstable molding pressure increase the producing cost and decrease the product competitiveness. This study proposes a molding process analysis to detect the pressure of every running tunnel and ensure the performance of the product. Moreover, a real-time mold pressure monitoring device with high sensitivity is proposed which is to detect the pressure of running point and the amplifier output voltage to be controllable signal. Through PSpice monitoring analysis on the amplifier circuit, the proposed monitor system is proved to be feasible for pressure detecting of thermoplastic injection molding. 200pcs testing run was done, the result shows that the defect fraction rate can be reduced from 10% to 6%. This molding temperature control system greatly increases the quality of the injection products as well as its competitiveness.
39
Ho, John, and 何宗陽. "Mold Design for Plastic Part Featured with Undercut." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/63280087076877610185.
Full textAbstract:
碩士大葉大學
機械工程研究所碩士在職專班
94
Today’s rapidly growing demand of plastic product in market and shortening product life cycle, not only increasing need of injection mold but also shortening development-time in its design. As to the plastic parts without undercut-feature, the construction of mold design is simple, but those with undercuts more than two, are time-consumed and complicated due to design parameters correlated each other even for an experienced designer. Main concerns in this paper are explored the optimal parting direction during mold design of plastic part with undercut in order for minimum interference among parting line , parting surface and parting direction. Design of the related mechanism for molding the undercut-featured part are proposed and illustrated by examples.
40
Wu, Chun-Hung, and 吳俊宏. "The Design of Plastic Mold forms standardization and regulations for JACK ConnectorThe Design of Plastic Mold forms standardization and regulations for JACK ConnectorThe Design of Plastic Mold forms standardization and regulations for JACK Connector." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/37562018236249843882.
Full textAbstract:
碩士國立高雄應用科技大學
模具工程系碩士班
96
ABSTERACT Connector is a general reference that usefully shown the electronic signal and the power source connection part as well as the attached fitting. The coupling is the bridge for all signals and its quality not only on the influence electric current and the signal transmission reliable degree, but also the effect upon the entire operation quality of the electronic machine. Along with improvement of industrial development, various products and a large amount of quantities are requested with high quality and exquisite appearance. Therefore, in order to improve the mold industry construction, it is important to learn experiences from overseas’ industry. Comprehensively carries out the mold standardization, the mold design, the manufacture integration, the mold specialization production, the management craft standardization, the production program, and the management is the key toward success The goal for this research is using JACK connector as the main object for standardization .In addition to establishes a set of molds standardization procedure, a designs of the main axle, a work process and the management rules. To improve the way of how current companies viewing the mold standardization, it is important to setup all the above rules and policy. Essential character: Connector (Coupling), plastic molding forms, mold design, mold standardization.
41
Lee, Jiann Shing, and 李建興. "The application of plaster mold on development of loose sintering in combination CIP process." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/49361112241464212369.
Full textAbstract:
碩士國立臺灣科技大學
機械工程研究所
83
Presently MIM is a hotest topic in P/M industry, because the process can produce high density of complicate shaped parts. However, MIM has a major disadvantage, namely the debinding time is too long, and also has a limitation that fine powder must be used. In this study, plaster mould will be applied in the com- bined work of loose sintering and CIP process. If fine powders (3.8μm) are used in this process, the aim is to eliminate the mixing, granulating and debinding steps and time reguired in the MIM process. If 150μm powder are used, it is intended to break the limitation of fine powder in the MIM process. In conclusion: (1).plaster mould can be used in loose sintering. (2).CIP can not show it's contribution on densification of loose sintering parts clearly. (3).150μm powders does not be loose sintering easily, but it can be easy in air at 500℃ and be reduced densification sintering completed in hydrogen.
42
Wu, Pei-jui, and 吳培瑞. "Study of Innovative Service in the Plastic Mold Development." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/17300450416927465844.
Full textAbstract:
碩士國立臺灣科技大學
工業管理系
99
The development of the plastic mold industry in Taiwan’s manufacturing industry always plays a decisive role in the world. The overall industrial cluster effect in Taiwan is excellent, especially in the 3C industry; and the contribution to the world is even more significant. According to the statistics from the Ministry of Finance, there are 1.25 million entrepreneurs in Taiwan in 2009. However, the proportion of the manufacturing sector accounted for 10.55% of all the accounting for 34.07% total sales. The mold industry is associated with the industry's output of about 58% of the manufacturing sector. As the pace of Taiwan's rapid economic development, coupled with the manufacturing industry environment in recent years rapid changes toward the bigger trend. Some of large enterprises are in vertical integration to combine the upstream and downstream resources through the supply chain system, which is a more direct compression to some small and medium companies’ survive. While the cross-strait political and economic improvement, push the industry move to the labor-intensive and low cost areas, which caused the loss of jobs. Recently, Mainland China workers have different consciousness about the labor rights. The mainland authorities also begin to set up additional restrictions on the manufacturing sector. The local low labor cost advantage is no longer exists. It is the time for Taiwan's manufacturing industry to rethink our next step. The service-oriented manufacturing sector has been much attention and discussion. Under the economic development in the globalization trend, the integration of services and manufacturing industries to enhance industry competitiveness and upgrading the industrial structure has a obviously effect. This article aims to explore how to combine the resources of Taiwan's manufacturing SMEs, using the project management knowledge with e-commerce platform, and takes the plastic mold development as an example. The thesis will base on the internal and external environment, background, and the discovery of knowledge to meet customers’ real demand. Also build up the partnerships with customers. Furthermore, to extend the service areas to the upstream and downstream supply chain and provide customers the total solutions and innovative point of view, hoping to find another new era for the plastic mold industry in the island.
43
Mao, Yu-Yung, and 茆育詠. "An interchangeable moldbase system optimization design of plastic mold." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/24124918790094024469.
Full textAbstract:
碩士逢甲大學
機械與電腦輔助工程學系
103
The study is focus for the optimization of extended development UG NX software on the mold-base system. Using the Mold Wizard, Excel files and UG parametric modeling to develop a set of synchronization engineering and interchangeable construction of mold-base aided design system. The design efficiency would be improved, and then solve the situation of the mold-base structure changed that the designers met. For example, the dilemmas caused by using the original mold-base system to redesign the mold form the edge gate mold-base to the pin-point gate mold-base. Use the new system developed by this study to run mold-base switching, would not cause the change of the other design features. And it can also provide the producers more flexibility in production planning and scheduling. During initial design period, if the supplier could not provided the mold-base in the manufacture time, use other suppliers through this new system to confirm the details of the problem and reduce subsequent problem. The study optimizes mold-base interchange system and provides mold designers collaborative designing. Thus, it would also shorten the duration and reduce cost.
44
Nee, Andrew Y. C. "Computer-aided Tooling Design for Manufacturing Processes." 2003. http://hdl.handle.net/1721.1/3737.
Full textAbstract:
Tooling design for manufacturing processes refers to direct tooling for making a part such as molds and dies for injection molded parts and metal stampings, or for supporting machining operations such as jigs and fixtures. This paper summarizes some of the R&D activities in those areas over a period of 20 years in the Department of Mechanical Engineering, National University of Singapore. It is notable that increasing use of computer tools has turned what is used to be known as a “black art” into a discipline embracing both heuristic and scientific analyses.Singapore-MIT Alliance (SMA)
45
Wu, Hui-Sian, and 吳慧賢. "Use of NX to Develop a Design Guiding System for Mold Base of Plastic Injection Mold." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/66714143319270382548.
Full textAbstract:
碩士國立臺灣科技大學
機械工程系
103
With the increasingly frequent use of plastic products in a rapidly changing global market, companies face problems such as shorter product life cycles, price competition, and high capital costs. There is therefore a need to accelerate the development of products and standardize the operation and manufacturing processes to enhance industrial competitiveness.In this thesis, we built a web-based database website for standard mold base components in the ASP.NET development platform and used the application programming interface NXOpen provided by Siemens’s 3D CAD/CAM software NX to develop a design guiding system for mold bases of plastic injection molds. This system enables users to select and download the standard mold base files from the web server and automate assembly of mold plates and conduct the following mold base design work in NX: (1) import the mold assembly: defining the mold cavity, and cut out the required mold cavity that is placed in the mold; (2) automate assembly of mold standard parts: automate assembly of all mold base components, automate generation of large numbers of mold standard parts, and assemble the standard parts onto each exclusive mold plate; (3) changing mold design: the mold design change was performed by a user in response to the requirement of mold designs.In this thesis, we develop an internet-based design-change-oriented database system for mold base parts. This system provides an easy-to-operate user interface, allowing the user to select the mold base specifications, calculate the related geometric parameters, and retrieve the required information for every mold base component automatically. The system can also be used to automate the modification and rebuilding of each mold base component. Therefore, all mold base components were imported into the mold base design guiding system to perform the three tasks of import the mold assembly, automate assembly of mold standard parts, and changing the mold design. By using the simple operating interface in the NX system, the user is able to complete the mold base design quickly, thus enhancing the speed of the operational workflow of mold products, and reducing the human negligence and error of the mold design engineer.
46
Chun-ChangWu and 巫俊昌. "Preparation of polymeric resists and molds for micro/nano-imprinting lithography on flexible plastic substrates." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/36452344564938913697.
Full textAbstract:
博士國立成功大學
材料科學及工程學系碩博士班
98
This thesis can be divided into five parts. First, a novel liquid photo-polymerization resist was prepared for nanoimprint lithography on transparent flexible plastic substrates. The resist is a mixture of poly(methyl methacrylate) (PMMA), methylmethacrylate (MMA), methacylic acid (MAA) and two photo-initiators, (2-isopropyl thioxanthone (ITX) and ethyl 4-(dimethylamino)benzoate (EDAB)). The resist can be imprinted at room temperature with a pressure of 0.25 kg/cm2, and then exposed from the transparent substrate side using a broad band UV lamp to obtain nano- and micro-scale patterns. Replications of high-density line and space patterns with resolution of 150 nm were obtained on a flexible indium tin oxide/poly(ethylene terephthalate) (ITO/PET) substrate. The liquid resist has low viscosity due to the liquid monomers, and low shrinkage due to the addition of PMMA as a binder. Second, we have developed low-cost, high modulus, flexible, and UV transparent polyimide plastic molds for nanoimprint lithography (NIL). Different structures of poly(amic acids) (PAA) and polyimides (PI) have been synthesized. By casting the PAA or PI solutions on a silicon master, flexible but still rigid plastic molds can be produced. The advantages of the PI molds are: (1) high glass-transition temperatures (Tg) up to 310 oC, (2) high thermal stability over 500 oC, (3) high tensile modulus, and (4) UV transparency for use in UV-NIL. Various micrometer and nanometer scale patterns could be obtained from the PI molds on a large area (4 inch wafer). The imprinting results showed that the PI molds could be faithfully used for both hot embossing NIL and UV-NIL. Third, we have used solvent-free thermo-curable epoxy systems for low-pressure and moderate-temperature nanoimprint lithography (NIL). The curing kinetic parameters and conversion of diglycidyl ether of bisphenol A (DGEBA) resin with different ambient-cure 930 and 954 hardeners were studied by the isothermal DSC technique. They are useful for the study of epoxy resins in the imprinting application. The DGEBA/930 and DGEBA/954 epoxy resists can be imprinted to obtain high-density nano- and micro-scale patterns on a flexible indium tin oxide/poly(ethylene terephthalate) (ITO/PET) substrate. The DGEBA/930 epoxy resin is not only suitable for resist material, but also for plastic mold material. Highly dense nanometer patterns can be successfully imprinted using a UV-curable resist from the DGEBA/930 epoxy mold. Using the replicated DGEBA/930 epoxy mold instead of the expensive master can prevent brittle failure of the silicon molds in the NIL. Fourth, the solvent-free thermo-curable epoxy/inorganic hybrid resists were prepared for low-pressure and moderate-temperature imprint lithography. Epoxy/silica and epoxy/titania hybrid resists were synthesized via sol-gel process from a diglycidyl ether of bisphenol A (DGEBA) prepolymer with a metal alkoxide precursor and a coupling agent, 3-glycidyloxypropyltrimethoxysilane (GLYMO). The introduction of the coupling agent results in the reinforced interfacial interaction between epoxy resin and inorganic nanoparticles. Transmission electron microscopy (TEM) analyses showed that the silica or titania particles were well dispersed in the epoxy resin matrix on a nanometer scale without the formation of aggregates. The thermooxidative stability and the glass-transition temperature (Tg) of the epoxy/silica nanocomposite showed improvement compared to the pure epoxy resin. When 10 wt% inorganic nanoparticles were added, the etching resistance of the epoxy/silica and epoxy/titania nanocomposites increased 4 and 3.2 times, respectively, compared to the pure epoxy resin. The epoxy/inorganic hybrid resist can be imprinted to obtain high-density patterns with resolution of 110 to 500 nm on a flexible indium tin oxide/poly(ethylene terephthalate) (ITO/PET) substrate. The shrinkage of the epoxy/silica and epoxy/titania hybrid resists imprinted patterns decreased to 1.5 % and 1.3 %, respectively. Fifth, we have developed a novel method to fabricate conductive silver tracks and dots directly from silver nitrate solution by nanoimprinting lithography techniques, which is inexpensive and able to be scaled down to the nanometers scale. The silver nitrate precursor can be reduced in ethylene glycol vapor to form silver at low temperatures. Energy dispersive spectrometric (EDS) analysis results indicate that the silver nitrate has been converted to silver completely. In order to obtain smooth and continuous conductive patterned silver features with high resolution, the silver lines with widths of a few tens of micrometers to nanomerters were patterned by using a spin-coating approach. Using a 14 M silver nitrate solution, continuous silver conductive lines with a resistivity of 8.45 x 10-5 ? cm has been produced.
47
楊定清. "Using Ultrasonic Vibration on Ejection System of Injection Plastic Mold." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/58871574606213861290.
Full textAbstract:
碩士逢甲大學
機械與電腦輔助工程學系
102
With the advancement of technology, mold industry is also increasingly toward the development of high-value and high-precision. For example: optical lenses. The quality can be enhanced with the requirement of product. Dent, split, abrasion and whitening occurred by ejection in early period are not be acceptable in nowadays. It’s all because of the product are too stick with the mold core and its need large ejection force to eject. Therefore ejection mechanism is easy be damaged too, for example: ejector pin fracture and bending. Many kinds of contacting force between product and mold, for example: capillary force, van der waals’ force and, the reaction caused by product shrink. Therefore the main purpose of the study is to discuss if ultrasound can vibrate capillary force and van der waals’ force, then achieving decrease in ejection force and making reduce the problem of product stress concentration. The study use systematization to simulation analysis the situation of ultrasoundinjection on product as discussion. Two questions as discussion, one is how to use CAE to find out the most perfect incident azimuth and incident position under the laboratory equipment specifications and limitations and to experiment practically. And then use pneumatic cylinder and resistance scale to design an Equipment of ejection force measuring. The other is to discuss the difference between adding ultrasound and not to add ultrasound in mold.
48
Wu, Guei-sheng, and 吳貴聖. "A Study on the Ultrasonic-Assisted Plastic Injection Mold System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/41624328242548635240.
Full textAbstract:
碩士逢甲大學
機械工程學所
96
Energy-saving is the most important issue in recent years. Essentially, the traditional industries must be appreciably concerned. In this thesis, the molding dies used in the polymer or polymeric composite injection molding processes are studied because the mold dies are quite complex and heavy used in the present molding processing. Based on the aid of ultrasonic oscillation instead of devices of ejecting pins, the conventional molding system are redesigned and enhanced for the purpose of energy saving in this study. The ultrasound generation device is attached or fixed onto the bed of the injection molding machine and this device will be excited as molding object to be released is required. In this study, a novel methodology of molding-object releasing using PZT probe is researched and developed for energy saving. In other words, a molding-object releasing system with the aid of ultrasonic oscillation under the assurance of quality, the increasing of productivity, and energy save is presented in this thesis. Consequently, this methodology can be used to various shapes of mold dies.
49
Fu, Chia-Hung, and 傅家宏. "The Action of Stress on Displacement of Plastic Injection Mold." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/n93r2b.
Full textAbstract:
碩士國立臺北科技大學
機電整合研究所
99
The part dimension of 3C plastic product was required for more and tighter. Either the machining accuracy of the mold or mold displacement (deflection) may be affect on the final dimension of the plastic part. In this study, mold structure is two-plate mold and the molding space layout is two-cavity mold. Moldflow CAE software was used to analyze the in-mold pressure distribution and temperature distribution. And then these analytical data was loaded into ANSYS software as the boundary condition of thermal structure couple field. The configuration of this paper includes: (a) in an injection molding process, analyze the mold displacement under structural stresses and thermal-structure stresses, respectively; (b) comparing the in-mold displacement and mold-plate displacement for the different mold material; (c) using Taguchi experimental method and the analysis of variance, to study the injection molding parameters affect on the mold displacement, and to find the optimal processing parameters. Results show the displacement of mold is so small that almost can be neglected when the analysis only take into account the structural stresses. However, if the thermal structure stresses was considered, the mold displacement is so enough large and cannot be ignored. Therefore, the thermal structure stresses must be used for analyzing the mold displacement. By using Taguchi experimental method, the significant factors are the mold temperature, mold space block distance, mold-plate thickness, and in-mold pressure. Comparing the difference of mold displacement, the original design is 0.062 mm, and the optimal design is 0.053 mm. This shows the optimal processing parameters and the minimizing the mold displacement can be obtained by using Taguchi experimental method.
50
Lu, Shao-An, and 呂紹安. "New Process Development of Aluminum-Epoxy Mold for Plastic Injection." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/71846092884494417058.
Full textAbstract:
碩士國立臺北科技大學
機電整合研究所
92
Followed by the development of Rapid Prototyping Technology (RP) and in order to extend the usability, Rapid Tooling (RT) has been introduced to industry. RT can be categorized as Direct-Build and Indirect-Build. There are many approaches commercially available using direct-build RT which include RapidTool, DMLS, DCP, AIM, DSPC…etc. Due to the limitation of the material property, surface smoothness, and geometric accuracy, they are not appreciated by industry. Instead, for indirect-build, “silicon mold” is one of the most common RT used widely for a limited number of parts. Even though the aluminum-epoxy mold via indirect-build method has been introduced to industries, but the difficulty of the surface finish and parting line accuracy are troubling to technicians. The purpose of this study is to develop a new rapid tooling process based on aluminum-epoxy composite material for plastic injection. In the conventional injection mold the steel and aluminum mold fabrication is a time-consuming and laborious job. For such reason, this research describes an improved aluminum-epoxy composite mold fabrication process that is based on a sterolithography Rapid prototyping (RP) system. There are three different approaches have been designed and taken in this paper. There are “thickness adjustment reversing method”, “core, cavity, and part assembly and reversing method”, and “gap control for reversing method”. As the result, the modified “gap control for reversing method”, which can be called as “modified second generation for parting”, has shown a good performance in injection and the resulting plastic parts meet the request by most design houses.