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Dissertations / Theses on the topic 'Molding surface'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

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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2

Bast, Felix. "Feasibility study and optimization of the design of an injection molded plastic bike frame." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/20948.

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3

Masato, Davide. "Analysis of the tribological effects of mold surface properties on the micro injection molding process." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3427272.

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Injection molding is one of the most widespread processes for the manufacturing of plastics products, for several applications. However, the increasing competitiveness of the current industrial environment constantly pushes the plastics industry towards the design of smaller, lighter and thinner parts, to reduce both product cost and environmental impact. This lead to significant manufacturing issues that are often related to the design of injection molding tools. In this contest, the design of mold surfaces represent a strategic point for the optimization of several key aspects of the process

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4

Shi, Jianjun. "Experiment and simulation of micro injection molding and microwave sintering." Thesis, Besançon, 2014. http://www.theses.fr/2014BESA2064/document.

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Procédé de moulage par injection de poudres est constitué de quatre étapes principales: la préparation des matières premières, moulage par injection, le déliantage et le frittage. Cette thèse présente les recherches sur deux aspects principaux: la micro-injection et frittage par micro -ondes. Les contributions principaux peuvent être conclues dans les quatre aspects suivants: Modification et complément de l'algorithme précédent pour la simulation du procédé de moulage par injection; L'évaluation et la mise en œuvre de l'effet de tension de surface en simulation pour micro-injection; Micro-onde

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5

Boualleg, Abdelmadjid. "Investigations on post-processing of 3D printed thermoplastic polyurethane (TPU) surface." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-41203.

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Abstract The reduction of product development cycle time is a major concern in industries to remain competitive in the marketplace. Among various manufacturing technologies, 3D printing technology or also known as additive manufacturing (AM), has shown excellent potential to reduce both the cycle time and cost of the product due to its lower consumption of energy and material usage compared to conventional manufacturing. Fused deposition modeling (FDM) is one of the most popular additive manufacturing technologies for various engineering applications which has the ability to build functional p

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6

Raja, Moshan Haider. "Experimental optimization of process parameters to obtain class A surface finish in resin transfer molding process." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=102158.

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Resin transfer molding (RTM) has great potential to become an efficient and economical process for fabricating large and complicated automotive composite structures. Low capital investment, excellent mechanical properties, closed mold processing, low pressure equipment, short cycle times and process versatility in component integration and assembly, make RTM very attractive for high volume automotive applications. However, a high class surface finish, required for exterior car body panels, is difficult to achieve with RTM. There are several material and process parameters that severely affect

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7

Ting, Huang, and Nordqvist Daniel. "Design and manufacturing of SLM printed tooling for plastic injection molding." Thesis, Jönköping University, Tekniska Högskolan, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-54170.

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The thesis work is to show that the use of SLM (Additive Manufacturing) compared with the traditional process to make injection molds will have advantages in design, especially in waterways. This thesis work gives seven different versions of design applied to the SLM method to analyze and compare them in Solidworks® and Moldflow® to figure out what design is suitable for the SLM method. Through analysis of different versions, the finding of this thesis work is that the conformal waterway of design and lighter but stead structure in the SLM method causes the SLM molds' cooling performance to b

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8

Thakur, Varun. "Influence of temperature and polymer/mold surface interactions on micro-feature replication at ambient pressure in micro injection molding." Connect to this title online, 2006. http://etd.lib.clemson.edu/documents/1175185896/.

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9

Holmgren, Julia, and Fredrik Christensen. "Framtagning av testmetod för värmeledningspåverkan av formsprutningsverktygens ytbeläggning." Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20246.

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Sedan 1951 har Tetra Pak tillverkat livsmedelsförpackningar, formsprutningsverktyg och fyll-ningsmaskinerna för livsmedelsförpackningar. En del livsmedelsförpackningar som t.ex. gräddeoch yoghurt kan ha en formsprutad topp av plast. Det är nödvändigt att den formsprutade plas-ten stelnar så snabbt som möjligt. För att minska tiden för stelning så används formverktygmed hög värmeledningsförmåga, detta för att få stabila detaljer och ändå göra det möjligt atthålla en hög produktion. En acceptabel livslängd på verktygen uppnås genom att de ytbeläggs.Ytbeläggningen består dels av en hårdanodiserad

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10

ZAMPIERON, JOAO V. "Caracterizacao fisica de particulas e reologica de um sistema heterogeneo utilizado em moldalgem de pos por injecao a baixa pressao." reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10979.

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11

Kropáč, Ondřej. "Hodnocení kvality ventilu termostatu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402509.

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The automotive thermostat currently contributes significantly to the potential to reduce the output of the exhaust gases. The heart of the modern thermostat is the ball valve assembly which also deals with this master‘s thesis. First of all the principles of the quality of the automotive thermostat are described with the choice of further deeper examined properties. The manufacturing process of a ball element and PTFE sealing ring is described. Subsequently the problem of increased production of nonconforming products in production is studied focusing on the surface texture of teflon ring and

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12

Riviere, Sylvain. "Optimisation et simulation du rotomoulage réactif." Phd thesis, Paris, ENSAM, 2012. http://pastel.archives-ouvertes.fr/pastel-00838690.

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Le rotomoulage réactif est un procédé de fabrication de pièces creuses en polymère où la synthèse du matériau intervient pendant la mise en œuvre. Cette méthode présente plusieurs avantages comparée à la méthode traditionnelle utilisant des poudres thermoplastiques : réduction du temps de cycle, utilisation possible de matériaux techniques, et baisse de la consommation d'énergie et du coût des matières premières. Cependant le rotomoulage réactif est plus complexe à mettre en œuvre car la polymérisation provoque un changement important et rapide de la viscosité. Une des solutions pour optimiser

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13

Hamidi, Abdelmoumen. "Modélisation et simulation du rotomoulage réactif du polyuréthane." Thesis, Paris, ENSAM, 2015. http://www.theses.fr/2015ENAM0016/document.

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Le procédé du rotomoulage réactif est une technologie de fabrication de pièces creuses de taille et géométrie très variés. Une compréhension et une modélisation des phénomènes physiques qui interviennent dans les différentes étapes de la fabrication apportent une contribution importante à la maîtrise de ce procédé. Les travaux abordés dans cette thèse se situent dans le cadre d'un programme plus général visant le contrôle et le pilotage du rotomoulage réactif.Tout d'abord, une caractérisation et modélisation de la cinétique du polyuréthane thermodurcissable en mode dynamique est réalisé suivie

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14

Cordova, Bruno Alexandro Bewzenko. "Otimização do processo de moldagem por injeção do ABS via metodos estatisticos." Universidade Estadual de Ponta Grossa, 2018. http://tede2.uepg.br/jspui/handle/prefix/2564.

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Submitted by Eunice Novais (enovais@uepg.br) on 2018-07-24T12:23:29Z No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Bruno Alexandro Melo Cordoba.pdf: 5568473 bytes, checksum: b7b2a5b911d9cf8f3e1f1564ba6a257e (MD5)<br>Made available in DSpace on 2018-07-24T12:23:29Z (GMT). No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Bruno Alexandro Melo Cordoba.pdf: 5568473 bytes, checksum: b7b2a5b911d9cf8f3e1f1564ba6a257e (MD5) Previous issue date: 2018-01-30<br>A moldagem por injeção é um dos processos mais vers

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15

Raynal, Caroline. "Frottement avec glissement de polymères fondus : filières à haute et basse énergie de surface." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10002.

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Nous analysons l'ecoulement de polymeres fondus de grandes masses moleculaires dans des contractions brusques. Dans des filieres a haute energie de surface, un glissement macroscopique se manifeste pour des debits moderes lors de l'ecoulement oscillant. Pour des debits du meme ordre, un regime instable se developpe en amont de la contraction. Dans ce memoire, une etude experimentale detaillee de l'ecoulement oscillant a ete menee pour deux polyethylenes et les resultats obtenus pour l'un des produits ont permis de valider un modele theorique. Pour trois familles de polymeres, deux polyethylene

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16

Bernardeau, Fabien. "Stratégies et scénarii de valorisation de déchets phénoplastes au sein de matrices thermoplastiques." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTS033/document.

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Cette thèse, réalisée en partenariat avec deux industriels, a pour objectif de mettre au point une voie de valorisation matière des résines phénoplastes (bakélite) issues de gisement de déchets plastiques. En effet, ce type de résine (thermodurcissable) n’est pour l’instant pas valorisé en fin de vie et finit en enfouissement. Pour répondre aux attentes législatives (directive DEEE, mais aussi VHU dans l’automobile), qui imposent un quota de recyclage (réutilisation et valorisation matière) et de valorisation énergétique minimum pour les déchets en fin de vie, il parait important de développer

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17

Galdámez, Edwin Vladimir Cardoza. "Aplicação das técnicas de planejamento e análise de experimentos na melhoria da qualidade de um processo de fabricação de produtos plásticos." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/18/18140/tde-18112002-090421/.

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Experimentos industriais são realizados pelas empresas no intuito de melhorar as características de qualidade dos produtos e processos de fabricação. Nesse sentido, esta dissertação tem como objetivo estudar e aplicar as técnicas de planejamento e análise de experimentos na melhoria da qualidade industrial. Como parte do objetivo, desenvolve-se uma aplicação com as técnicas de planejamento fatorial fracionado '2POT. K-P', metodologia de superfície de resposta e análise de variância, em um processo de moldagem por injeção, utilizado por uma indústria que fabrica e comercializa componentes plást

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18

Sorgato, Marco. "Characterization of the micro injection molding of micro- and nano- structured polymer surfaces." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3424332.

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The micro injection moulding process has a set of advantages that makes it commercially interesting, with potential for further developments in the future. In this sense, its application to the replication of surfaces characterized by micro and nano-structures has been the focus of many researches. In this work, the micro injection moulding process for the manufacturing of nanofeatures and high AR microfeatures was characterized, focusing on the challenges and limitations in the replication. This research completely characterized the micro injection moulding technology, not only considerin

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19

Morelli, Carolina Lipparelli. "Processamento e estudo das propriedades de filmes e peças injetadas de nanobiocompósitos de nanocristais de celulose e matrizes biodegradáveis." Universidade Federal de São Carlos, 2014. https://repositorio.ufscar.br/handle/ufscar/721.

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Made available in DSpace on 2016-06-02T19:10:22Z (GMT). No. of bitstreams: 1 6015.pdf: 4561575 bytes, checksum: 252a378ed3b63f6b097f991565a256f1 (MD5) Previous issue date: 2014-04-04<br>Financiadora de Estudos e Projetos<br>This study aimed at evaluating the potential of application of cellulose nanocrystals as reinforcing elements of biodegradable polymeric matrices, in the films and injection molded pieces applications. Two polymeric matrices with different properties were used, namely: poly(butylene adipate-co-terephthalate), PBAT, and poly(lactic acid), PLA. For the extraction of cellulo

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20

Härtig, Thomas. "Stoffübertragung beim Spritzgießen." Doctoral thesis, Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-108290.

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Das Fügen mehrerer Komponenten während des Spritzgießprozesses wird bei vielen Spritzgießsonderverfahren angewandt. Diese Arbeit beschäftigt sich mit der Verbundbildung zwischen einem kalten Einlegeteil und der einströmenden Kunststoffschmelze beim Spritzgießen, im Folgenden Stoffübertragung genannt. Ein Großteil der Untersuchungen findet an Zweikomponenten-Zugstäben statt, wobei erste und zweite Komponente aus dem gleichen Thermoplast gefertigt werden. Mögliche Einflussfaktoren auf die Verbundfestigkeit werden zunächst im Theorieteil vorgestellt und diskutiert. Eine Auswahl relevanter Prozess

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21

Maillot, Isabelle. "Simulation du remplissage/compactage pour la mise en forme des thermoplastiques par injection : applications industrielles." Université Joseph Fourier (Grenoble ; 1971-2015), 1993. http://www.theses.fr/1993GRE10029.

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Ce travail porte sur la modelisation des phases de remplissage et de compactage dans le procede de mise en forme des thermoplastiques par injection. Le but de notre etude est d'etablir un modele unique pour calculer l'ecoulement du polymere fondu dans la cavite refroidie de l'empreinte en tenant compte de la compressibilite des le debut du remplissage, de sorte que le compactage dans les zones remplies est simule sans rupture de modele. Le probleme instationnaire est non lineaire par le frot couplage des equations entre elles et par la variabilite des proprietes physiques (viscosite non newton

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22

Li, Wanbo. "Rapid and low-cost mass fabrication of true three-dimensional hierarchical structures with dynamic soft molding and its application in affordable and scalable production of robust and durable whole-teflon superhydrophobic coating." HKBU Institutional Repository, 2019. https://repository.hkbu.edu.hk/etd_oa/611.

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Superhydrophobic (SH) surfaces equipped on the skins of natural living beings give them trumps of self-cleaning, anti-bacterial, water harvest, and directional liquid transport, etc., to survive in harsh environments. Bioinspired Superhydrophobic (SH) surfaces have developed many emerging functions, such as self-cleaning, anti-bacterial, water harvest, anti-icing, anti-corrosion, oil-water separation, and many other fascinating functions. However, the implementations of SH coating in real world are still in its infancy, due to (i) the poor performance in the harsh real-world environment and in

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23

Legrand, Frédéric. "Glissement aux parois des polymères fondus enchevêtrés." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10288.

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On etudie tout d'abord le glissement sur une surface metallique usinee, qui adsorbe fortement le polymere. Pour atteindre les forts taux de deformation necessaires, une filiere d'extrusion bidimentionnelle a ete construite. Les mesures de vitesses dans l'ecoulement sont faites en suivant le mouvement de particules solides. Des mesures de birefringence de contrainte sont faites soit globalement par la methode des franges, soit localement au moyen d'un appareil a modulateur photo-elastique. Trois polymeres sont etudies : un polydimethylsiloxane, un polybutadiene et un styrene-butadiene statistiq

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24

Vastesson, Alexander. "Thiol-ene and Thiol-ene-epoxy Based Polymers for Biomedical Microdevices." Doctoral thesis, KTH, Mikro- och nanosystemteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215110.

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Within healthcare there is a market pull for biomedical devices that can rapidly perform laboratory processes, such as diagnostic testing, in a hand-held format. For this reason, biomedical devices must become smaller, more sophisticated, and easier to use for a reasonable cost. However, despite the accelerating academic research on biomedical microdevices, and especially plastic-based microfluidic chips, there is still a gap between the inventions in academia and their benefit to society. To bridge this gap there is a need for new materials which both exhibit similar properties as industrial

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25

Nguyen, Van-Hau. "Characterization and modeling of flax fiber reinforced composites manufacturing by resin transfer molding process." Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10156.

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Ce travail de thèse présente la caractérisation expérimentale de fibres de lins et une modélisation de l’écoulement de résine lors du procédé de Resin Transfer Molding (RTM) utilisant ces mêmes fibres. La variation du diamètre des filaments de lins immergés dans différents liquides tests est caractérisée par observation au microscope. Le taux et la vitesse d’absorption de liquides tests dans les fibres sont ensuite obtenus par centrifugation. Un nouveau modèle de perméabilité est ainsi développé afin de prendre en compte les effets du gonflement des fibres sur la perméabilité quelque soit le l

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26

Cazaux, Guillaume. "Faisabilité des procédés LCM pour l'élaboration de composites renfort continu à matrice thermoplastique polyamide." Thesis, Le Havre, 2016. http://www.theses.fr/2016LEHA0010/document.

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ALes travaux présentés sont une contribution à l’élaboration de composites à matrices thermoplastiques (TP) par un procédé de type Liquid Composite Molding non réactif pour l’industrie automobile. La thèse a été effectuée dans le cadre du projet ANR TAPAS (ThermoplAstic Process for Automotive composite Structure) et s’est focalisée sur la mise en œuvre de plaques composites en renfort continu injectées avec des matrices polyamides 6,6 (PA 6,6) de hautes fluidités par Resin Transfer Molding. Le premier objectif est porté sur l’optimisation des cadences d’injection à travers l’étude de la perméa

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27

Maitre, Emmanuel. "Sur une classe d'équations à double non linéarité : application à la simulation numérique d'un écoulement visqueux compressible." Phd thesis, Université Joseph Fourier (Grenoble), 1997. http://tel.archives-ouvertes.fr/tel-00004955.

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L'origine de ce travail est l'étude d'un problème industriel sur la mise en forme des thermoplastiques par injection. Nous nous sommes concentrés sur la partie remplissage du moule et sur la détermination de la position du front du polymère. Le travail présenté dans cette thèse comprend donc deux parties: => L'étude mathématique et numérique de l'équation en pression qui régit l'écoulement du polymère fondu. A partir de cet exemple nous avons mis en évidence et étudié une famille nouvelle d'équations à double non linéarité. => La détermination de l'interface polymère-air par des méthodes de su

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28

Rainer, Thomas Michael. "A newer urbanism molding the urban surface /." 2002. http://purl.galileo.usg.edu/uga%5Fetd/rainer%5Fthomas%5Fm%5F200208%5Fmla.

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Dong, Jhi Gang, and 董志剛. "Inveestigation of Process Parameters Effect on Molding Window and Part Surface Quality in Gas-Assisted Injection Molding." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/86232835231436289733.

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碩士<br>中原大學<br>機械工程研究所<br>84<br>The research purpose of this thesis is to conduct the experiments of gas-assisted injection molding to understand the effect of process parameters and gas channels on gas penetration molding windows and the quality of part.It also investigate the influence of gas penetration from different types and installed positions of gas needles. Based on the research results,the application of gas-assisted injection molding to the production of three automotive parts wer

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Chen, Chao-Ying, and 陳昭穎. "The Transcription effects of precised polishing surface on glass molding." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/60499194425118762517.

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碩士<br>健行科技大學<br>機械工程所<br>101<br>The micro-lens array has become an important component of the optical system. The uniform distribution of light energy is one of the applications for a micro-lens array. It is an effective method to produce lenses by using the glass molding technology. However, the higher accuracy of mold cores is important regarding higher quality of lens products. Besides, the glass material is suitable to use in the fields of high temperature and extreme environment. The shape of mold core is not easy to polish due to the complex geometry. Therefore, a mixed mechanism include

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梁源杉. "Investigation of Part Surface Visional Quality in Gas-Assisted Injection Molding." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/88296687500656969963.

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碩士<br>中原大學<br>機械工程學系<br>85<br>The main focus of this research was to understand the problems of surface visional quality, by inducing gas flow into plate and the thickness of local part, between gas channel and plate in gas-assisted injection molding. Due to the structure of human''s eyes, a visible object is the composition results of reflection intensity and color changing of object. The former one is the gloss measuring by glossmeter. The latter one can be measuring by chroma meter. So this surface visional quality including glossy difference and chromatic aberration was researcded. Th

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Chiu, Yu-Ching, and 邱昱晴. "Effect of Mold Design on Mold Surface Heating in Injection Molding." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/30191465086532073753.

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碩士<br>國立成功大學<br>航空太空工程學系碩博士班<br>97<br>Injection molding is an important fabrication process for polymer plastics with the advantages of mass production, fast and low cost. Its applications are quite broad in appliance, electronics, and anformative, etc. In this decade, a lot of commercial products become smaller and lighter. The relevant techniques for high demand on appearance and quality improvement bring the better products to consumers. Thin-walled injection molding is usually molded under high mold temperature and high injection pressure. Methods to raise the mold surface temperature have

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Tso, Chin-An, and 左清安. "A Fabrication of surface-relief fiber grating using micro-molding process." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/jmebbe.

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碩士<br>國立虎尾科技大學<br>光電與材料科技研究所<br>98<br>In this thesis, we proposed a method for fabricating D-shaped optical fiber by polishing the surface on the fiber. After, utilizes the photolithography and holographic interference lithography technologies, which fabricated the Bragg surface grating on the D-shaped fiber. Next, we can using micro-molding process to fabricating surface-relief fiber grating by the special material (polydimethysiloxane, PDMS). During the fabrication, we first make some polishing samples to do side-polished on multi-mode fiber. It would precisely stop polishing until reaching

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Lin, Feng-Rong, and 林夆融. "Built-in Induction-Heating Module for Rapid Heating of Injection Molding Surface." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/22446283089536065117.

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碩士<br>國立臺北科技大學<br>製造科技研究所<br>92<br>This thesis develops a rapid induction-heating module built in injection mold. The module can assist to fabricate micro patterns. The major features of the module include employing injection compression technique of compact disc and using electro-forming of MEMS process or micro fabrication to produce the embedded mold-inserts on the stamper. Also an induction-heating module fabricated by micro fabricated process is installed behind the stamper such that the high frequency power wave can heat the microstructure on the stamper in a short time. Through this ra

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Huang, Yao-Lin, and 黃耀霖. "The Induction Coil Design Applied for Rapid Surface Heating of Injection Molding." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/549rys.

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碩士<br>國立高雄第一科技大學<br>機械與自動化工程所<br>96<br>The study aims to investigate the optimized designation of high-frequency electromagnetic induction coils, which are utilized in the rapid mold surface heating of injection mold, in order to realize rapid heating, uniform temperature distribution, and maximized heated area at even temperature. The study is mainly concerned with solving the unbalanced heat distribution of heated target at its cross and deep sections due to the approximate and skin effects most commonly occurring at the use of conventional single layer coil for induction heating. By adoptin

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Yu-TingSung and 宋昱廷. "Design of Non-Planar Induction Coils for Injection Molding Tool Surface Heating." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/76714660263142763987.

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博士<br>國立成功大學<br>機械工程學系<br>102<br>Recently, energy saving is one of the important issues for polymer processing industry. Electromagnetic induction heating has many advantages such as fast heating and low energy consumption. Previous studies using electromagnetic induction heating for rapid tool heating have indicated that the temperature uniformity on a cavity surface is not easy to be achieved. In this paper, a planar coil was used for heating uniform 30mm thick hot work tool steel (JIS SKD61) surface, another coil was used for 7 inch display frame tool and another non-planar coil was designe

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Tang, Bin-Hong, and 唐賓宏. "Operating window of injection molding for plastic lenses constructed by response surface." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/51348118211670446673.

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碩士<br>國立勤益科技大學<br>機械工程系<br>101<br>Injection molding of plastic products is a low-cost, high production-rate processing technology which is suitable for automation; however, the quality of the product is highly nonlinear because of the variations in temperature, pressure, flow-rate and density of the materials. This study is aimed at identifying the operation windows for the injection molding process parameters which produce lenses with optimized contour precision. The operation conditions for products with qualified contour precision and the lowest cost can be determined through these operat

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Chi-PO-Chun and 紀博竣. "Optimization of injection molding parameters using Taguchi method and response surface method." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/33412448396593316945.

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碩士<br>建國科技大學<br>機械工程系暨製造科技研究所<br>102<br>This study aimed to explore the warpage effects of different injection factors in the injection molding process. The mold flow analysis software (Moldflow Plastics Insight 5.0) combined with the Taguchi method and response surface analysis to find the optimal injection parameters. The significant parameters for warpage were found by Taguchi method, which was packing time, packing pressure and filling pressures. These factors were applied to obtain minimum warpage through response surface analysis. The results are useful for understanding the correlation

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WANG, CHIA-CHING, and 王嘉慶. "Effect of surface morphology on Zirconia injection molding and its biting stress." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/53098189526546249136.

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博士<br>國立高雄應用科技大學<br>機械工程系<br>105<br>In this study, a scanning electron microscope, a non-contact surface roughness tester, and a contact angle meter were used to investigate the surface microstructural features of zirconia samples, which were injected and printed from the SM4Cr13 mold steel pretreated by femtosecond laser technology. The biocompatibility of the samples was assessed with an alkaline phosphatase test. The study results show that as the scanning speed increased, the surface of SM4Cr13 mold steel sample transformed from an island-like particulate structure into a relatively smooth

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HSIEH, CHANG-HSING, and 謝長興. "Research on Atomization on Glass Surface after Hot Press Molding Optical Glass." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/574q5u.

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碩士<br>國立中央大學<br>機械工程學系在職專班<br>106<br>In this paper, the studying of the surface atomization phenomenon after thermal bending formed process between the optical glass that with the thickness of 6mm and graphite mold characteristics, especially in the fixed the formed time; formed pressure and change the formed temperature; graphite mold design, and the key thermal bending formed parameters are affected for the surface atomization of optical glass after thermal bending formed process. Through the temperature measurement meter to measure surface temperature of graphite mold at each point after we

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Peng, Hsin-Shu, and 彭信舒. "INVESTIGATION ON THE ESTABLISHMENT AND ANALYSES OF INSTANTANEOUS MOLD SURFACE HEATING IN INJECTION MOLDING." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/86q9bj.

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博士<br>中原大學<br>機械工程研究所<br>91<br>High mold temperature provided great contributions to conventional and advanced injection molded parts. Especially, it can decrease the requirement of high-performance machine, special mold and high flow resin for thin-wall or micro/micro-feature molding processes. Nevertheless, high mold temperature also increases cooling time of injection molding cycle. Hence, the purpose of this research is to establish instantaneous mold heating system and set up 3D magnetic-thermal coupled-field analysis technique. To evaluate the benefits of instantaneous mold surface heati

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Su, Chien-Chia, and 蘇建嘉. "Study on the Part Surface Quality of Rib with External Gas-Assisted Injection Molding." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/13594848234016453853.

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碩士<br>中原大學<br>機械工程研究所<br>95<br>Accompanying with the I.T. industry develops vigorously; more and more people ask for stylish design, strength quality and good looking of products. Traditional Injection Molding Process can’t afford the desire of the market, and most high quality products need to be reprocessed. Therefore, External Gas-Assisted Injection Molding not only can enhance Part Surface Quality and strength but also make design flexible and variety. It applied to 3C products fittingly nowaday, but there still has short of relative references of the process. Following the thesis, we woul

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Chung, Yung Chien, and 鍾永謙. "Simulations of the Cyclic Transient Mold Cavity Surface Temperature Variation in Injection Molding Process." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/22747794290232471669.

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Ying-XuanChen and 陳螢萱. "Application of Lattice Boltzmann Method in Free Surface Flow Simulation of Micro Injection Molding." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/m72fw3.

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HUANG, CHUNG-HUAN, and 黃崇桓. "Investigation of Induced Electromagnetic Proximity Effect Used for Rapid Mold Surface Heating in Injection Molding." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/35610495929448300683.

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碩士<br>中原大學<br>機械工程研究所<br>97<br>Now 3C products request surface high brightness and reducing cycle time to reach high output. High mold temperature provided great contributions to conventional and advanced injection molded parts. Especially, it can decrease the requirement of high-performance machine, special mold and high flow resin for thin-wall or micro/micro-feature molding processes. The purpose of this study is to develop high-frequency induced electromagnetic proximity effect heating technique to heat mold surface fast. At the first stage, test mold material(beryllium copper、P20、STAVAX 4

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Hung, Chi-Wei, and 洪啟偉. "Optimization for Plastic Injection Molding Operations by Dual Response Surface Method and Non-Linear Programming." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/86789599922023949304.

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碩士<br>東海大學<br>工業工程與經營資訊學系<br>96<br>In the process of plastic injection molding (PIM), factors of warpage and shrinkage have the notable influence on product quality. Particularly aiming at a small and thin product, the problem that raises warpage and shrinkage will bring into relief more. Molding in the current parameters set, the technicians often need to set or experience to do it using computer simulation software, but such a practice of searching the optimal combination of parameters requires spending a considerable amount of time and cost. For years, the plastic molding methods to improve

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YANG, SHUN-YUAN, and 楊舜淵. "Study of Electromagnetic Interference Shielding Effectiveness of Injection Molding Composite Parts by Response Surface Methodology." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/58sd96.

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碩士<br>國立臺北科技大學<br>製造科技研究所<br>107<br>This study focused on the electromagnetic shielding effect of polycarbonate plastics after mixing 20wt% carbon fiber materials, and understood the influence of different injection molding parameters on electromagnetic shielding. The molding parameters are selected from different melting temperature, mold temperature, injection speed and packing pressure. Five different levels are designed by the response surface methodology to test the prediction equations of the injection molding process parameters for electromagnetic shielding, and the optimal parameters.

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Yen, Ying-Meng, and 顏穎盟. "Analysis on Replication of Micro Surface Roughness and Macro Geometry for Injection Molding of Flat Plates." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/3wzwzv.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>95<br>This research is to investigate the replication of micro surface features and macro geometry in injection molding of flat plates. There are three mold inserts with different levels of random surface textures including Ra 3.2 μm, Ra 0.8 μm, and Ra 0.2 μm. Experimental design for mold insert is proceed with two block tests, one is to evaluate the average filling ratio (AFR) and another is to evaluate average non-uniformity (ANU). Experimental factors for AFR are melting temperature (Tmelt) and injection velocity (Vinj), while the factors for ANU are packing press

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Wang, Bo-Wei, and 王柏崴. "Optimization of Injection Molding Processing Parameters on Plastic Part for Electrostatic Discharge by Response Surface Methodology." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/yrdw9b.

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碩士<br>龍華科技大學<br>機械工程系碩士班<br>105<br>With the rapid development of science and technology, the demand for electronic products with various functions and higher product life is also increasing. Modern electronic products often use integrated circuits (ICs). Advances in semiconductor technology allow the manufacture of integrated circuits with smaller and sophisticated electronic components to increase computing speed and reduce costs. However, the refinement of the component size leads to some impacts on the product, one of which is to reduce the ability of the wafer to resist Electrostatic Disch

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Tsai, Han-Chang, and 蔡瀚章. "Study on shear strength of the PC injection molding adhesion on the O2 plasma treated surface PPS." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/hvab9d.

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碩士<br>國立高雄應用科技大學<br>化學工程與材料工程系碩士在職專班<br>103<br>The experiment illustrates the melted PC(Polycarbonate) through injection machine is successfully jointed with PPS(Polyphenylene sulfide). The PPS needs to be sandblasted and treated with O2 Plasma, and preheated to the constant temperature. The joint strength of PC and PPS could achieve above 500kg which is the best strength of joint, measured by homemade shear strength tester. The experiment also proves advantage of PPS surface treatment: 1. sandblasting can remove impurities on surface. 2. O2 plasma treating on surface can increase surface roug

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