冷却速率对HDPE厚壁制品收缩及缩孔形成的影响  

The Influences of Cooling Rate on Shrink and Shrinkage Formation of HDPE Thick Parts

作　　者：陈志[1] 钱欣[1] 金杨福[1] 陈冰冰[2] 高增梁[2] 

机构地区：[1]浙江工业大学化材学院,浙江杭州310014 [2]浙江工业大学机械学院,浙江杭州310014

出　　处：《塑料》2010年第3期113-114,68,共3页Plastics

基　　金：江省科技厅重大专项资助项目(2008C01047-3)

摘　　要：运用注射成型分析软件Moldflow,分析了高密度聚乙烯30 mm立方体塑件在不同冷却条件下的体积收缩率。分析结果表明:较高的模具温度和适当的熔体温度使厚壁塑件壳层-芯层体积收缩率差异达到最小,同时能够避免内部缩孔的形成。实验对比验证表明:模温达到120℃时,内部缩孔基本消失。The volume shrinkage problem under different cooling conditions for HDPE 30 mm thick part was analyzed by the Moldflow software. According to the analysis results,higher mold temperature and proper melt temperature could minimize the difference of volume shrinkage between core and surface, and also could avert the shrinkage cavity. The experiment showed that,the shrinkage cavity would disappear as the mold temperature reached 120 ℃.

关 键 词：冷却速率 厚壁 收缩 HDPE 缩孔 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]