• Title/Summary/Keyword: Precision Mold

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Study on Ultra-Precision Grinding Processing for Aspheric Glass Array Lens WC Core (비구면 유리 어레이 렌즈 성형용 초경합금 코어 초정밀 연삭 가공에 관한 연구)

  • Ko, Myeong Jin;Park, Soon Sub
    • Journal of the Korean Society for Precision Engineering
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    • v.33 no.11
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    • pp.893-898
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    • 2016

  • Plastic array lens are cheap to manufacture; however, plastic is not resistant to high temperatures and moisture. Optical glass represents a better solution but is a more-expensive alternative. Glass array lens can be produced using lithography or precision-molding techniques. The lithography process is commonly used, for instance, in the semiconductor industry; however, the manufacturing costs are high, the processing time is quite long, and spherical aberration is a problem. To obtain high-order aspherical shapes, mold-core manufacturing is conducted through ultra-precision grinding machining. In this paper, a $4{\times}1$ mold core was manufactured using an ultra-precision machine with a jig for the injection molding of an aspherical array lens. The machined mold core was measured using the Form TalySurf PGI 2+ contact-stylus profilometer. The measurement data of the mold core are suitable for the design criterion of below 0.5 um.

  • https://doi.org/10.7736/KSPE.2016.33.11.893 인용 PDF KSCI

Shoemoulds Runner Shape Optimization using MoldFlow (MoldFlow를 이용한 신발 사출금형 러너부 형상 최적화)

  • 류미라;서영백;문병주;박흥식
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.1483-1486
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    • 2003

  • Injection mold is a manufacturing process used to produce the various parts of complicated shape at a low cost. Many factors such as, section shape, resin and mold temperature, filling time, etc, affect on the quality of injection part during injection molding process. The precent study, was carried out the shrinkage analysis of shoes injection mold to optimize runner shape based on filling and packing pressure with MoldFlow. Taguchi design and analysis of variance are used to optimize injection mold design.

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