Analysis of filling, packing, and cooling stages in injection molding of disk cavities

Wen‐Yen ‐Y Chiu, Leo‐Wang ‐W Chen, Chi Wang, Ding‐Chang ‐C Wang

研究成果: Article同行評審

5 引文 斯高帕斯(Scopus)


This research tried to simulate three stages of injection molding cycles (filling, packing, and cooling) for polypropylene. The cavity used was a center‐grated disk‐shaped mold. During the filling stage, we assumed the polymer fluid obeyed the CEF equation and flowed nonisothermally. The packing stage was represented by isothermal flow of Newtonian fluid, and, during cooling stage, we took into account the effect of pressure drop on the energy balance. By finite difference method, we could solve the partial differential equations numerically. The results showed. (1) Elastic effect was not significant at the filling stage. (2) Pressure buildup in the cavity was very quick at the packing stage. (3) At the cooling stage, temperatures predicted by taking into account pressure drop were lower than those without considering pressure drop. In addition, the influences of mold temperature, flow rate, and inlet melt temperature on the three stages of injection molding process were discussed.

頁(從 - 到)39-48
期刊Journal of Applied Polymer Science
出版狀態Published - 1991 七月 5

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 表面、塗料和薄膜
  • 聚合物和塑料
  • 材料化學


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