摘要
将套管作为研究对象,ABS为注塑材料,采用一模六腔中心对称布局浇注系统,基于Moldflow模拟其填充过程和翘曲变形。在填充过程中,没有出现滞留、短射等现象;6个零件填充平衡对称,实现了压力最小化,无过保压现象;填充效果较好。翘曲变形分析结果表明,熔料收缩不均是翘曲变形的主要原因。因此,对零件保压方案进行优化,将保压压力由填充压力80%增加到最大值170%,零件最大体积收缩率和缩痕指数分别下降至2.025%和0,零件由收缩不均造成的翘曲变形量比原方案降低了10%,总的翘曲变形量比原方案降低7%。该方法在企业模具设计过程中得到了验证,具有一定的推广价值。
Casing was taken as the research object,ABS was used as injection material to simulate the injection molding process,the casting system was established by adopting a six-cavity central symmetry layout of a mould,the filling process and warping deformation were simulated based on Moldflow. In the filling process,the retention and short shot were not appeared in the filling,and the six parts were filled with balanced symmetry,so that the pressure was minimized,and the pressure maintaining was avoided,the filling effect was good. The analysis of warping deformation showed that the main cause of warping deformation was the uneven shrinkage of melt. Therefore,the pressure holding scheme of plastic parts was optimized,and the pressure holding pressure was increased from 80% to 170% of filling pressure,the maximum volumetric shrinkage and sink index of plastic parts were reduced to 2. 025% and 0 respectively. The warping deformation caused by uneven shrinkage of plastic parts was 10% lower than that of the original scheme,and the total warping deformation was reduced by 7%. The method was verified in the enterprise in the mold design process had a certain value to be popularized.
作者
刘昌霖
高可可
孙江宏
LIU Changlin;GAO Keke;SUN Jianghong(Electrical and Mechanical School,Bejjing Information Science and Technology University,Bejjing 100192,China)
出处
《塑料》
CAS
CSCD
北大核心
2020年第5期125-128,共4页
Plastics
基金
国家重大科学仪器专项计划(2014YQ24044504)
北京市属高校高水平创新团队建设计划(IDHT20180513)
促进高校内涵发展项目--“高精尖仪器与智能制造”学科群建设(5121911002)。
