厚壁塑件注射成型排气不畅的解决方法  

Study on solution of gas trapping for injection moulding of thick wall products

作　　者：王旭东 杜日 王永飞 王振东 郎志伟 WANG Xudong;DU Ri;WANG Yongfei;WANG Zhendong;LANG Zhiwei(Dalian Hualu Guozheng Industry Co.,Ltd.,Dalian 116620,China)

机构地区：[1]大连华录国正产业有限公司,辽宁大连116620

出　　处：《模具工业》2024年第6期40-43,共4页Die & Mould Industry

摘　　要：注射成型过程中的排气不畅易导致塑件产生缺料、烧焦等成型缺陷,以某汽车用操纵手柄为例,对如何解决厚壁实心塑件在注射成型过程的排气不畅现象开展了理论和试验研究。研究结果表明,模拟分析可有效预测排气不畅的大致位置;合理的分型面布置有利于分属动、定模型腔的气体同步排出,对排气不畅现象的改善有明显效果;抽真空是解决排气不畅、提高微细结构(麻纹表面)注射成型复制度的必备措施。The gas trapping in injection moulding would lead to defects such as insufficient filling and burning of plastic products.Taking a kind of automobile control handle as an example,theoret-ical and experimental research on how to solve the gas trapping of thick-walled solid products during injection moulding was carried out.The results showed that the simulation analysis could effectively predict the approximate location of gas trapping.The rational layout of parting surface was conducive to the simultaneous discharge of gas on both sides of the fixed and moving half cav-ity,and it has obvious effect on the improvement of gas trapping phenomenon.Pumping vacuum is a necessary measure to solve the gas trapping and improve the accuracy of repetition for injection molding in micro structure(pattern surface).

关 键 词：厚壁 排气不畅 抽真空 注射成型 

分 类 号：TG76[金属学及工艺—刀具与模具] TQ320.662[化学工程—合成树脂塑料工业]