气体辅助成型技术在光盘托盘中的应用  

Application of Gas-assisted Molding Technology in Disc Tray

作　　者：郭伟 GUO Wei(Mechanical Engineering Institute,Dalian Vocational Technical College,Dalian 116037,China)

机构地区：[1]大连职业技术学院机械工程学院,辽宁大连116037

出　　处：《新技术新工艺》2020年第7期30-33,共4页New Technology & New Process

基　　金：大连职业技术学院2019年度科研课题(DZ2019A-02)。

摘　　要：气体辅助注射成型技术是近年来在我国得到大力推广和应用的一种新兴工业技术,该技术在中大型外观框架结构件上的应用研究较多。光盘托盘是一种对表面平整度和平面度要求较高的小型薄壁运动塑料制品,该制品生产中经常出现保压时间、注射温度等细微变化带来的残余应力翘曲,由于残余应力的释放缓慢,对制品的品控带来了较大的困难。通过对气体辅助注射成型技术的分析,结合光盘托盘制品在表面平整度和动静模双向的精度尺寸要求,提出了光盘托盘模具的气体辅助成型改造方案,分析了小型薄壁运动塑料制品气体辅助成型生产的常见问题,取得了成型时间缩短25%、制品质量减少6.99%、热冲击试验显示残余应力释放导致的变形量低于热流道模具制品等良好效果,并对在光盘托盘模具上应用该技术的效果和经验进行了总结。Gas assisted injection molding(GAIM)was a new industrial technology which has been widely promoted and applied in China in recent years,it was widely used in large and medium-sized structural parts.Disc tray was a kind of small thin-wall movable plastic product with high requirements for surface flatness.In the production of products,the residual stress warping caused by the slight changes of pressure holding time and injection temperature often occurred,due to the slow release of residual stress,it brought great difficulties to the products quality control.Based on the analysis of the technology of gas assisted injection molding,and combined with the requirements of the surface flatness of the disc tray products and the two-side dimension precision of the moving die side and static die side,it was put forward that the transformation scheme of the gas assisted molding of the disc tray mold,the common problems of the gas assisted molding production of the small thin-wall action plastic products were analyzed,and good results were obtained such as the reduction of the molding time by 25%,the reduction of the product weight by 6.99%,and the thermal shock test showed that the deformation caused by the release of residual stress was lower than that of hot runner mold products.The effect and experience of applying the technology to the disc tray mold were summarized.

关 键 词：气辅注射 注射成型 薄壁零件 残余应力 模具工程 温度冲击 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]