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Dissertations / Theses on the topic 'Plastic injection molds'
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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.
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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.
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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.
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Crawford, Joseph Carlisle-Eric III. "Injection failure of stereolithography molds." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17687.
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LeBaut, Yann P. "Thermal aspect of stereolithography molds." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/15991.
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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.
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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.
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Blair, Bryan Micharel. "Post-build processing of stereolithography molds." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/19132.
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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.
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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.
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Palmer, Anne Elizabeth. "The effect of feature geometry on the life of stereolithography molds." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/18385.
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Cedorge, Thomas. "Surface roughness and draft angle effects on stereolithography molds." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/18199.
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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.
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Sanchez, Urbina Israel. "Optimizing flow of plastic PBT with 45% glass and mineral fiber reinforcement in an injection over mold process using Taguchi, CPk and mold flow simulation software approaches." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2009. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.
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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.
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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.
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Zhou, Feng. "In-mold melt-front rate control using capacitive transducer in injection molding /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?CBME%202008%20ZHOU.
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Hioe, Yunior. "Mold thermal design and quasi steady state cycle time analysis in injection molding." Connect to resource, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1141840509.
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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.
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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.
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Václavek, Jiří. "Výroba součásti "KRYTKA"." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230083.
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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.
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Yu, Liyong. "Experimental and numerical analysis of injection molding with microfeatures." Columbus, Ohio : Ohio State Uniersity, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1080318678.
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Thesis (Ph. D.)--Ohio State University, 2004.Title from first page of PDF file. Document formatted into pages; contains xvi, 202 p.; also includes graphics (some col.). Includes abstract and vita. Advisor: Kurt W. Koelling, Dept. of Chemical Engineering. Includes bibliographical references (p. 196-202).
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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.
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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.
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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/.
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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
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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.
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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.
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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.
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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.
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Bhagavatula, Narayan L. "Modeling and experimental verification of pressure prediction in the in-mold coating process for thermoplastic substrates." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1145371989.
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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.
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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.
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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.
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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.
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Nevřivý, Lukáš. "Technologie výroby plastového držáku střešního nosiče." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241702.
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This master’s thesis focuses on a design of injection mold which is used for manufacturing of a plastic holder of roof rack. The first part includes shape analysis of the holder and explains function of the product as well as specify essential requirements which must be met. The choice of the most suitable manufacturing technology is followed by theoretical part which deals with literature review of plastic materials, technology of injection molding and basics of injection mold designing. Practical part includes overall design of the mold for the holder of roof rack based on technological calculations. Practical part is followed by mold flow analysis simulation showing suitability of designed mold along with selection of suitable injection molding machine based on product construction design and technological process of manufacturing. The conclusion of master’s thesis includes an economical evaluation of proposed manufacturing technology.
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Ulrich, Josef. "Optimalizace technologických parametrů vstřikování plastového dílce." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231262.
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This thesis describes the optimalization of technological parameters during commissioning of injection mold manufacturing. In the introduction, there is general literary studies of plastics, injection molds, injection holding machine, injection holding technology and their effect on quality. The practical part includes an analysis of current state, calculation of injection parameters, moldflow analysis and sampling on the machine. Finally, there is choice of optimal injection holding parameters, design of workplace and technical-economic evaluation.
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Cardon, Ludwig Kamiel Stefan. "A generic procedure for mould material thermal behaviour modelling using finite element simulation of hybrid plastic injection moulds." Thesis, Birmingham City University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435526.
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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.
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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.
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Pytlík, Radek. "Návrh technologie výroby tělesa světlometu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231961.
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The project developed within the Master's degree is proposing a technology of manufacturing a headlight housing from the high temperature polycarbonate Apec 1695 with wall thickness of 1.8 mm. The batch size is set at 100,000 units / year. Based on literature studies of injection moulding and also on the calculation method, the injection moulding tool with the heated injector has been proposed. The injection moulding machine Allrounder 630 S 2500-800 from Arburg is used for the production of the plastic headlight housing.
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Kinsella, Mary E. "Ejection forces and static friction coefficients for rapid tooled injection mold inserts." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1092660338.
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Thesis (Ph. D.)--Ohio State University, 2004.Title from first page of PDF file. Document formatted into pages; contains xvi, 206 p.; also includes graphics (some col.). Includes bibliographical references (p. 167-173). Available online via OhioLINK's ETD Center
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Vejborný, Václav. "Konstrukční a technologický návrh plastových dílů na motocykl Blata 125." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-377363.
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This thesis solves actual engineering tasks from the field of motorcycle industry. The first part describes the design of several plastic parts for Czech motorcycle Blata125. The design of injection moulds for selected parts is described in second part of the thesis.
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Ivan, Matin. "Modularni sistem za projektovanje alata za injekciono presovanje plastike." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2014. http://www.cris.uns.ac.rs/record.jsf?recordId=85564&source=NDLTD&language=en.
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U disertaciji se prikazuje modularni sistem za projektovanje alata zainjekciono presovanje plastike. Analizirani su različiti prilazi uprojektovanu alata. Prikazana je koncepcija i funkcionisanjerazvijenog sistema. Verifikacija sistema je izvršena na konkretnimplastičnim proizvodima. Na kraju su dati odgovarajući zaključci imogući pravci budućih istraživanja.The dissertation shows the development of the modular system formold design for plastic injection molding. Different approaches wereanalyzed in the field of mold design. The concept and functioning ofthe developed modular system is presented. Validation of theproposed system is made with the specific plastic parts. At the endthe appropriate conclusions and possible directions for futureresearch are given.
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Nosek, Jan. "Návrh technologie výroby tělesa světlometu motocyklu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229143.
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The thesis is a proposal technology of the main body of motorcycle polymer material from Bayer's APEC - high temperature polycarbonate 1703. Literary study summarizes findings from a thermoplastic injection molding technology and the possibilities of structural design of injection molds, plastic plating technology from a focus on the most important technology in the field of lighting technology vehicles. Given the anticipated production run of 50 thousand. pieces are assessed a total of 2 variants of the molding parts. The practical part was modeled and specified product designed mold. Construction was done by using SolidWorks 2007 software and normalities FCPK Bytów and HASCO. For the selected option is implemented technological calculations. For the proposed technology was chosen Allrounder injection molding machine 570 A the manufacturer Arburg designed and suitable technological process of production.
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Moammer, A. A. "Thermal management of moulds and dies : a contribution to improved design and manufacture of tooling for injection moulding." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6652.
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Thesis (PhD (Industrial Engineering))--University of Stellenbosch, 2011.ENGLISH ABSTRACT: Injection moulding of polymer components is subject to ever increasing demands for improved part quality and production rate. It is widely recognised that the mould cooling strategy employed is crucial to achieving these goals. A brief overview of injection moulding units and different types of injection moulds is given. The modern Additive Manufacturing (AM) technology for processing metal powders such as Direct Metal Laser Sintering (DMLS) and Selective Laser Melting (SLM) offers almost full freedom to the mould designer. Some of these modern manufacturing methods based on metal powders, which are able to produce complex cooling channels are analysed. A drastic change has entered the mould design domain - shifting the paradigm from design for manufacture to manufacture for design. In combination with suitable AM methods the concept of surface cooling moulds can now be efficiently implemented. This study presents a new approach of predicting the minimum cooling time required for the produced part. Different cooling layouts are analysed taking the heat transfer into consideration. The lumped heat capacity method is implemented in this research in order to determine the minimum cooling cycle time required. A new approach was developed to determine the most suitable cooling layout configuration, such as conventional cooling, conformal cooling or surface cooling, required for a moulded part based on its characteristics such as shape complexity, space available for the cooling layout, part quality requirements, production volume, and product life cycle. A mould cooling design process including simulation, reverse engineering and manufacturing of the mould insert was implemented in this study. In order to validate the generic model developed during the course of this research comparative experiments were carried out to determine the difference in performance of injection moulding using conventional or surface cooling methods. The experimental results showed a significant improvement in part quality produced with reduced cycle times using the surface cooling method.
AFRIKAANSE OPSOMMING: ‘Injection Moulding’ van polimeer komponente word al meer gedruk vir verbeterde kwaliteit en vinniger produksie tyd. Dit is orals bekend dat die gietvorm afkoeling strategie ‘n groot rol speel om hierdie twee doelwitte te bereik. Eers word ‘n kort oorslag gegee van ‘Injection Moulding’ eenhede en van verskillende ‘Injection Moulding’ vorms. Die moderne Aditatiewe Vervaardigingstegnologie vir die prosessering van metaal poeiers soos bv. Direkte Metaal Laser Sintering (DMLS) en Selektiewe Laser Smelting (SLM) bied basies volle vryheid ten opsigte van gietvorm ontwerp. Party van die moderne vervaadigings metodes, wat op metaal poeiers gebaseer is, wat komplekse koelings kanale kan produseer word geanaliseer. Die ontwerpers arena het ‘n groot verandering ondergaan deurdat die fokus van ontwerp vir vervaardiging verskuif het na vervaardiging vir ontwerp. In kombinasie met toepaslike aditatiewe vervaardigings metodes kan oppervlak verkoeling nou effektief geïmplementeer word. Hierdie studie bied a nuwe manier om die minimum verkoelings tyd benodig vir ‘n part te voorspel. Verskeie verkoelings uitlegte word geanaliseer waar hitte oordrag in ag geneem word. Die “lumped heat capacity” metode word gebruik om die minimum siklus tyd te bepaal. ‘n Nuwe benadering is ontwikkel om die mees geskikste verkoelings uitleg soos bv. konvensionele verkoeling, konvorme verkoeling of oppervlak verkoeling te bepaal vir ‘n spesifieke part gebaseer op die part se vorm kompleksiteit, spasie beskikbaar vir verkoelings kanale, kwaliteit vereistes en produk lewensiklus. Die volgende is in die studie geïmplementeer: ‘n vorm verkoelings ontwerp proses met simulasie, ‘reverse engineering’ en vervaardiging van die vorm insetsel. Om die generiese model te verifieer gedurende die studie is vergelykende eksperimente uitgevoer om die verskil in prestasie te bepaal tussen die gebruik van konvensionele en oppervlak verkoelings metodes. Die eksperimentele resultate het ‘n beduidende verbetering in part kwaliteit getoon met ‘n verkorte siklus tyd tydens die gebruik van die oppervlag verkoelings metode.
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Adamiec, Pavel. "Návrh technologie výroby svorkovnice přístroje z plastu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229918.
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The master thesis deals with design to produce terminal using the plastic injection molding. In the first part are theoretical information about injection molding and injection molding with inserts. The second part is a concrete design of production terminal which contains: injection mold design, calculation of the injection parameters, machine selection, technical and economic evaluation of production. Terminal is made of polyamide 66, inserts material is brass. Parts of injection mold assembly are selected from Hasco standards. The main parts of assembly are made of 1.2312 steel. Production cycle is placed on injection machine Allrounder 375 V from Arburg.
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Gryzinski, Ismael. "Aplicação de zamac-8 em molde-protótipo usinado e análise do moldado em polipropileno." Universidade Tecnológica Federal do Paraná, 2011. http://repositorio.utfpr.edu.br/jspui/handle/1/398.
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A razão da existência de um molde-protótipo é de se obter rapidamente um injetado com o mesmo material e utilizando o mesmo processo de fabricação do produto final, com baixo custo. Seus injetados podem servir como protótipos, lotes pilotos, pré-séries ou ainda cobrirem a necessidade de uma baixa demanda de produto ou de pequenos lotes. Critérios de manufaturabilidade e de qualidades mecânicas são importantes na fabricação do molde-protótipo. Entretanto, além destes critérios, este molde deve ser capaz de produzir um injetado com qualidade semelhante ao produto injetado em um molde convencional. Observa-se, no entanto, que são escassos os estudos referentes à utilização de material alternativo para molde-protótipo e a influência deste material no produto injetado. Desta forma, o objetivo principal deste estudo é caracterizar um molde-protótipo usinado em liga de zinco (zamac-8), através da análise das propriedades físicas (Microscopia Eletrônica de Varredura com Energia Dispersiva de Raio-X, MEV-EDS) e mecânicas (Ensaios de Tração e Flexão) do polipropileno (PP) injetado nesta ferramenta e compará-lo ao injetado em aço. Os resultados demonstram que o PP injetado em zamac-8 possui características similares ao moldado em aço, sem apresentar contaminação. Assim, este material pode ser recomendado para esta finalidade.The reason for the existence of a prototype mold is to obtain a quickly injected with the same material and using the same manufacturing process of the final product with low cost. Their models can serves as prototypes, pilot batches, preseries or the need to cover a lower demand for products or small batches. Criteria for manufacturability and mechanical qualities are important in the manufacture of prototype mold, but these criteria are only valid if this mold is capable of producing injected with a similar quality to the product injected into a conventional mold. However, there are few studies concerning the use of alternative material for prototype mold and the influence of that material into the product injected. Thus, the main objective of this study is to characterize a prototype mold machined in zinc alloy (Zamak-8), by analyzing the physical properties and mechanical properties of the polypropylene (PP) injected into this tool and compare it injected into the steel. The results show that the PP injected into zamac-8 has characteristics similar to the injected in steel mold, without contamination. Thus, this material can be recommended for the purpose for injection mold.
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Junkes, Vanderlei. "Análise das propriedades do PP injetado em molde-protótipo em Zamac-8 visando a obtenção de protótipos funcionais." Universidade Tecnológica Federal do Paraná, 2014. http://repositorio.utfpr.edu.br/jspui/handle/1/1142.
Full textAbstract:
O uso de moldes-protótipo é uma opção para a obtenção de protótipos funcionais de peças de plástico injetadas. Estes protótipos devem possuir características mecânicas e físicas as mais próximas possíveis das peças finais obtidas em moldes de produção. A fim de diminuir o custo e o tempo de fabricação destes moldes, materiais alternativos, tais como o alumínio e ligas de zinco, podem ser empregados. Os diferentes níveis de condutividade térmica desses materiais resultam em diferentes taxas de resfriamento do polímero, o que pode influenciar nas propriedades mecânicas do moldado. O objetivo geral deste trabalho é entender a influência do material do molde-protótipo (zamac-8) e também da variação da temperatura do molde (TMolde) e da temperatura do fundido (TFund) nas propriedades mecânicas do moldado em Polipropileno (PP). Pretende-se então averiguar se existem parâmetros de temperatura que possam permitir a obtenção de protótipos funcionais com características próximas as de peças injetadas em molde de aço. O efeito do material zamac-8, da TMolde e da TFund sobre as propriedades do moldado foi avaliado através da comparação com um moldado injetado em um molde em aço. As técnicas de caracterização das amostras incluíram os ensaios de tração, impacto e calorimetria exploratória diferencial (DSC). Os resultados mostraram que o molde- protótipo em zamac-8 possui influência significativa somente para a energia de impacto. Com a variação da TMolde e da TFund foram obtidos moldados com diferentes propriedades no molde-protótipo em zamac-8, confirmando a influência da variação destes fatores sobre o moldado. Desta forma, foi possível criar um modelo de regressão onde através da otimização dessas temperaturas é possível predizer um resultado. Assim, para este estudo, foi possível diminuir a influência do uso do zamac-8 sobre o moldado, sendo que a regressão mostrou-se uma ferramenta importante na busca de protótipos funcionais com propriedades mecânicas mais próximas do produto final.The use of prototype tooling is an option to obtain functional prototype of injection molded plastic parts. These prototypes should have mechanical and physical characteristics as close as possible to the final parts obtained in production molds. In order to reduce manufacturing cost and time of these molds, alternative materials, such as aluminum and zinc alloys, can be employed. The difference in thermal conductivity of these materials results in a variation of the cooling rates, which can influence the mechanical properties of the moldings. The main objective of this work is to understand the influence of the prototype tooling material (zamak-8) and also the variation of mold temperature (TMold) and the melt temperature (TMelt) on the mechanical properties of Polypropylene (PP). The idea is then to verify if these temperature parameters may allow obtaining functional prototypes with similar characteristics to the PP injected in a steel mold. The influence of the zamak-8 material and the TMold and TMelt on the properties of the molding was studied by comparison with the molding injected in a steel mold. The characterization techniques used were tensile and impact tests and differential scanning calorimetry (DSC). The results showed that the prototype tooling using zamak-8 has a significant influence only in the impact energy. By varying the TMold and TMelt, moldings injected in the prototype tooling with zamak-8 were obtained with different properties, confirming the influence of these parameters on the molding. In this way, a regression model was developed where, by optimizing these temperatures, it is possible to predict a result. Thus, in this study it was possible to reduce the influence of the zamak-8 on the molded, and regression was shown to be an important tool in the search for functional prototypes closer mechanical properties of the final product.
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Kollár, Pavel. "Možnosti elektrického propojení součástek v automobilových zámcích." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229767.
Full textAbstract:
This Diploma thesis is aimed at various ways of connecting electrical parts in car locks. This part of the thesis includes technologies of electric cables, printed circuit boards, lead frames, 3D-MID technology and technology of electroconductive plastics materials. Listed technologies are compared. The aim of the practical thesis portion is the application of electroconductive plastic materials on the given part. For this purpose necessary changes were designed in the provided small series injection mold. The thesis also includes drawing documentation of the designed construction changes in the injection mold, as well as economic appraisal of the prototype manufacturing fees.
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Nafi, Adelhak. "Etude expérimentale et numérique du comportement mécanique de moules d'injection de plastique obtenus par le procédé de Stratoconception." Toulouse 3, 2005. http://www.theses.fr/2005TOU30018.
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Cette recherche est une contribution à l'étude du comportement des assemblages brasés destinés à la réalisation des moules d'injection de matière thermoplastique obtenus par empilement de couches élémentaires brasées entre elles. Des essais mécaniques ont été réalisés afin de caractériser et prédire la durée de vie de l'assemblage brasé retenu comme optimal. Les paramètres de la loi de comportement du joint de brasage on été identifiés par une méthode inverse utilisant les résultats de l'essai de cisaillement et un calcul par éléments finis. Le jeu de paramètres caractérisant le domaine élastique du matériau a été exploité par la suite pour réaliser une approche analytique en 3D du comportement élastique à l'intérieur du joint de brasage. Enfin, une étude paramétrique géométrique a été réalisée afin d'évaluer la répartition des contraintes dans le joint de brasage, sollicité en cisaillement pur et en traction bout à boutThis research is a contribution to the study of behaviour of the brazed assemblies intended for the realization of injection mould of thermoplastics obtained by the stacking of elementary steel sheets, machined then brazed together. Mechanical tests have been carried out, in order to characterize the brazed assembly under the brazing configuration regarded as favourable. An elastoplastic behaviour with isotropic work hardening of the braze material was identified using a least-squares method, based on experimental results and on finite-elements calculations. The 3D elastic behaviour within the brazing joint was studied, under various loading conditions, so as to predict the conditions for plastification of the joint. Last, a numerical study of the geometrical parameters of a brazed assembly was carried out to evaluate the stress distribution within the brazing joint (under pure shear and traction loadings, respectively)
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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.
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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.
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Jahan, Suchana Akter. "Optimization of conformal cooling channels in 3D printed plastic injection molds." Thesis, 2016. http://doi.org/10.7912/C2V354.
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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.
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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.
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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)
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LAI, WEI KAI, and 賴瑋凱. "The Application of Scenario Analysis &; Co-opetition exploring the development of Plastic Molds &; Injection Molding Industry of SMEs in Taiwan." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/20998065099359169662.
Full textAbstract:
碩士國立中山大學
資訊管理學系研究所
103
This article is mainly about the co-opetition of small to medium scale Plastic Molds &; Injection Molding Industry in Taiwan, typically these industries can be classified into four categories by their production condition. By using Value System &; Value Chain to analyse elements that can affect the system, and by using ‘cause and effect analysis chart’, industries can determine the reasons for these elements. Lastly, by interviewing experts and conducting surveys, the verification can be achieved, also additionally with a scenario planning, this increases industry’s T2 ability as a prescient condition, and this allows prediction for any future potential scenarios. This article depicts the scenario when Plastic Molds &; Injection Molding Industry in Taiwan applies Co-opetition, Value System &; Value Chain and Scenario Planning of industrial upgrading. This thesis not only provides theoretical research purpose, but also provides a template for similar industries as a strategically reference guide.
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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.
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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.
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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.
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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.
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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.