• 제목/요약/키워드: Precision injection molding

검색결과 421건 처리시간 0.032초

사출성형해석을 이용한 수직머시닝센터 ATC 툴 포트의 사출 게이트 위치에 따른 성형성 평가 (Evaluation of Formability Dependent on the Location of Injection Gate of Vertical Machining Center ATC Tool Port Using Injection Molding Analysis)

  • 이여울;박철우;김진록;최현진
    • 한국기계가공학회지
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    • 제20권12호
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    • pp.129-135
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    • 2021

  • Injection molding is a manufacturing method of melting the polymer resin and injecting it into a mold to molding it into the desired form. Due to the short molding time and outstanding formability, complex products can be shaped with high precision and it is the most widely used polymer molding method. However, there may be areas that are not filled depending on the location of the injection gate where polymer resin is injected. Formability is determined by deformation and surface precision due to the impact of residual stress after molding. Hence, choosing the location of the injection gate is very important and molding analysis of injection molding is essential to reduce the cost of the mold. This study evaluated the injection formability based on the location of the injection gate of the vertical machining center ATC tool port using injection molding analysis and the results were compared and analyzed. Injection molding analysis was conducted on filling, packing, and deformation according to the location of the gate of the ATC tool port. From each injection gate location, filling time, pressure, and maximum deformation were compared. At gate 2, conditions of molding time and the location of the gate were far superior in production and quality. Gate 2 produced the smallest deformation of 0.779mm with the best quality.

  • https://doi.org/10.14775/ksmpe.2021.20.12.129 인용 PDF KSCI

사출성형의 충전조건 선정에 관한 연구 (A study of estimation of filling phase condition in injection molding process)

  • Jo, Y.M.;Kwon, O.J.;Kim, J.D.
    • 한국정밀공학회지
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    • 제12권3호
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    • pp.110-118
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    • 1995

  • The filling phase analysis of the injection molding process for thermoplastics was applied to predict pressure, themperature and shear stress in the test mold, and the results were compared with the experiment using 30% glass fiber added ABS resin. The finite difference method was used in the analysis considering the effects of heat transfer between molten polymer and mold wall, and also frictional heating by shear flow. The analysis results were considered as a method to improve the quality and the productivity of injection molding process. Using the analysis results, the molding factors such as mold-ability of polymers, performance of injection molding machine, positioning of gate and dimendsioning of runner in the injection molding process can be estimated at the design stage of mold for good quality and productivity.

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마이크로 금형 가공 및 사출성형에 관한 연구 (Micro Parts Machining and Injection Molding Technology)

  • 최두선;제태진;이응숙;신보성
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2003년도 춘계학술대회논문집
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    • pp.452-457
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    • 2003

  • As a fundamental study on developing elements with micro shape, micro mold parts machining and experiment of injection molding using it were performed. The ultra precision micro machining system with high functionality was fabricated, and utilized in the machining of micro parts. By using this machining system and micro end-mill tool, a micro circle column structure of high aspect ratio, diameter 60 $\mu\textrm{m}$, height 500 $\mu\textrm{m}$, was fabricated. And a micro lens molds were fabricated by using ball end-mill tool of 300 $\mu\textrm{m}$ diameter and diamond fly-cut tool of 150 $\mu\textrm{m}$ radius. A micro injection molding machine, which is clamping force 1.75 ton, injection capacity 2.8cc, was fabricated for injection molding experiment using micro molds. The injection molding experiment was performed by using the injection molding machine, micro cylinder structures and lens molds. This paper introduces these micro machining system and injection molding machine and demonstrates examples of injection molding using fabricated molds.

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사출 성형을 위한 니켈 도금을 수행한 마이크로 몰드의 개발 (Development of Micro mold with Electroplating Ni for Injection molding)

  • 황교일;김훈모
    • 한국정밀공학회지
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    • 제23권2호
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    • pp.138-145
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    • 2006

  • An injection molding is necessary to mass-product for micro-nano system, so micro-nano mold must be developed for injection molding. The micro-nano mold has precision and strength to overcome a surround of injection. So in this paper, two methods were used. First, after etching the Al, Ni was electroplated in etched AI. The other, LIGA method was used. A temperature and thickness of Ni are important factors in these methods. So after fabrication, the simulation was processed to find optimal thickenss of Ni and temperature.

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