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文章编号：1001-4934(2018)01-0022-04
Die and Mould Technology No. 1 2018
护套注塑成型缺陷分析与对策
张国新
（无锡科技职业学院制造技术系，江苏无锡214000）
摘要：护套塑件材料为热塑性聚氨酯弹性体(TPU)，经注塑成型出现了粘模、气泡、开裂与焦化等缺陷。针对注塑成型缺陷，从成型工艺参数或模具结构方面分析其产生的原因，并提出解决方案，经成型调试，获得有效的注塑成型工艺：塑料粒子烘干温度为82℃，烘干时间为3～4h，注塑加热温度为200220℃，注塑压力为100MPa，保压压力为80MPa，射胶时间为3s，冷却时间为15S，采用中性（或干性)脱模剂，实现塑件脱模。通过批生产验
证，该工艺有效地消除了护套注塑成型出现的缺陷，批生产塑件质量稳定。关键词：护套；TPU；成型调试；缺陷分析
中图分类号：TG241
文献标识码：B
Analysis and solutions on injection molding defects of sheath
ZHANG Guo-xin
Abstract:The plastic sheath made of TPU mayhave mucosac,bubbles,cracks,coking and other defects after injcction molding. The cause of injection molding defects related with molding process parameters or mould structure is analyzed,solutions were proposed and valid injection molding parameters were obtaincd after trial forming: the temperature of plastic particles drying is 82 C, the drying time is 3~4 h, the molding injection heating temperature is 200 ~220 C, the molding injcction pressure is 100 MPa and pressurized 80 MPa, the injcction time is 3 s, the cooling time is 15 s. The neutral (or dryness) release agent is adopted to achieve plastic part demolding. The injcction molding defects can be avoided adopting these parameters after verification of batch productions and the qualities of batch production parts are stable.
Keywords: sheath; TPU; molding debugging; defects analysis
宿舍安装了空调。由于学生宿舍结构限制，空
0引言
随着大学生宿舍条件的改善，大部分学生收稿日期：2017-06-15
调外机一般安装在在阳台上，空调外机三脚架高度正好与学生头部平齐。阳台作为学生生活、娱乐必可少的场所之一，有时学生会在无意
基金项目：江苏省"青蓝工程"学术带头人人才基金（苏教师(2014)1号）；无锡市智能制造名师工作室专
项资金（锡教高职[2015]38号）。
作者简介：张国新（1971一）.男.高级工程师。万方数据