Variations of Temperature and Pressure in the Cavity for Operational Conditions of Injection Molding

사출성형의 공정변수에 따른 캐비티 내의 온도와 압력의 변화

  • 김수웅 (서울산업대학교 금형설계학과) ;
  • 박현철 (서울산업대학교 금형설계학과) ;
  • 류민영 (서울산업대학교 금형설계학과) ;
  • 진영준 (서울산업대학교 정밀기계공학과) ;
  • 김도 (삼양사 화성연구소)
  • Published : 2004.10.01

Abstract

Pressure and temperature in the cavity of injection molding have been investigated. Special injection mold was designed to install pressure and temperature sensors. The sensors were supplied by KISTLER and the pressure and temperature were measured for various operational conditions, such as injection pressure, holding pressure, cooling time, mold temperature, and injection temperature. As injection pressure increased cavity pressure and temperature increase. There were no big differences in temperatures according to the holding pressures. As mold temperature increased pressure and temperature in the cavity increase. The flowability of resin increases as mold temperature increases subsequently the pressure in the cavity increases since the pressure loss is less in the low viscous medium than high ciscous medium. The cavity temperature highly depends upon mold temperature.