Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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A study on gas vent control of injection mold for the production of precision medical device parts

정밀 의료기기 부품 생산을 위한 사출금형의 가스벤트 제어에 관한 연구

  • Lee, Jeong-Won (Korea Institute of Industrial Technology, Research Institute of Advanced Manufacturing & Materials Technology Shape Manufacturing R&D Department) ;
  • Son, Min-Kyu (Korea Institute of Industrial Technology, Research Institute of Advanced Manufacturing & Materials Technology Shape Manufacturing R&D Department)
  • 이정원 (한국생산기술연구원 형상제조연구부문) ;
  • 손민규 (한국생산기술연구원 형상제조연구부문)
  • Received : 2020.05.27
  • Accepted : 2020.06.30
  • Published : 2020.06.30
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Abstract

Typical characteristics of medical device parts are that they can not be reused and there are many disposable products. Therefore, there is a need for an injection molding machine having excellent repeatability of molding conditions and a precision injection mold for mass production. Recently, the performance of an injection machine has made a remarkable evolution compared to the past. However, defects such as short-shot, flash, weld line, gas burning, warpage, and deformation, which are typical defects, still do not disappear at all. This is due to the lack of gas ventilation from the product cavities, even if the gas is smoothly vented from the sprue and runner of the mold. For this reason, the internal pressure of the cavity rises and is directly connected to the quality defects. In this study, an active gas vent system was designed to prevent defects due to trapped gas in the cavity. Since it can be easily adjustable in response to the molding conditions and the mold temperature changes, it is expected to improve productivity due to the reduction of the defective ratio.

Keywords

Acknowledgement

본 연구는 한국생산기술연구원의 기관주요사업(과제번호: JF190041)의 지원을 받아 수행되었으며, 시험성형에 도움을 준 (주)신흥정밀에 감사드립니다.

References

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