Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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Optimization of preform mold injection molding process for hemispheric plastic structure fabrication

반구형 플라스틱 구조체 성형을 위한 프리폼 몰드 사출성형공정 최적화

  • Park, Jeong-Yeon (Molds & Dies Technology R&B Group, Korea Institute of Industrial Technology) ;
  • Ko, Young-Bae (Molds & Dies Technology R&B Group, Korea Institute of Industrial Technology) ;
  • Kim, Dong-Earn (Molds & Dies Technology R&B Group, Korea Institute of Industrial Technology) ;
  • Ha, Seok-Jae (Molds & Dies Technology R&B Group, Korea Institute of Industrial Technology) ;
  • Yoon, Gil-Sang (Molds & Dies Technology R&B Group, Korea Institute of Industrial Technology)
  • 박정연 (한국생산기술연구원 뿌리산업기술연구소 금형기술그룹) ;
  • 고영배 (한국생산기술연구원 뿌리산업기술연구소 금형기술그룹) ;
  • 김동언 (한국생산기술연구원 뿌리산업기술연구소 금형기술그룹) ;
  • 하석재 (한국생산기술연구원 뿌리산업기술연구소 금형기술그룹) ;
  • 윤길상 (한국생산기술연구원 뿌리산업기술연구소 금형기술그룹)
  • Received : 2019.05.14
  • Accepted : 2019.06.30
  • Published : 2019.06.30
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Abstract

Traditional cell culture(2-dimensional) is the method that provide a nutrient and environment on a flat surface to cultivate cells into a single layer. Since the cell characteristics of 2D culture method is different from the characteristics of the cells cultured in the body, attempts to cultivate the cells in an environment similar to the body environment are actively proceeding in the industry, academy, and research institutes. In this study, we will develop a technology to fabricate micro-structures capable of culturing cells on surfaces with various curvatures, surface shapes, and characteristics. In order to fabricate the hemispheric plastic structure(thickness $50{\mu}m$), plastic preform mold (hereinafter as "preform mold") corresponding to the hemisphere was first prepared by injection molding in order to fabricate a two - layer structure to be combined with a flat plastic film. Then, thermoplastic polymer dissolved in an organic solvent was solidified on a preform mold. As a preliminary study, we proposed injection molding conditions that can minimize X/Y/Z axis deflection value. The effects of the following conditions on the preform mold were analyzed through injection molding CAE, [(1) coolant inlet temperature, (2) injection time, (3) packing pressure, (4) volume-pressure (V/P). As a result, the injection molding process conditions (cooling water inlet temperature, injection time, holding pressure condition (V / P conversion point and holding pressure size)) which can minimize the deformation amount of the preform mold were derived through CAE without applying the experimental design method. Also, the derived injection molding process conditions were applied during actual injection molding and the degree of deformation of the formed preform mold was compared with the analysis results. It is expected that plastic film having various shapes in addition to hemispherical shape using the preform mold produced through this study will be useful for the molding preform molding technology and cast molding technology.

Keywords

Acknowledgement

Supported by : 한국생산기술연구원

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