中国塑料 ›› 2020, Vol. 34 ›› Issue (6): 87-91.DOI: 10.19491/j.issn.1001-9278.2020.06.014

• 机械与模具 • 上一篇    下一篇

汽车后视镜座大型精密注塑模设计

刘方方(), 张维合   

  1. 广东科技学院,广东 东莞 523000
  • 收稿日期:2020-01-06 出版日期:2020-06-26 发布日期:2020-06-26
  • 基金资助:
    年度广东科技学院“高校重大科研成果培育计划”项目(GKY?2019CQYJ?12)

Design of Large Precision Injection Mold for Rearview Mirror Base of Automobile

Fangfang LIU(), Weihe ZHANG   

  1. Guangdong University of Science & Technology, Dongguan 523000,China
  • Received:2020-01-06 Online:2020-06-26 Published:2020-06-26
  • Contact: Fangfang LIU E-mail:liufangfang_82@126.com

摘要:

针对汽车后视座结构特点和以前模具在注射成型过程中存在的问题,对模具结构做了优化设计。通过采用先进的预变形技术,成功解决了塑件成型后翘曲变形问题。通过模流分析,确定了先进合理的浇注系统,成功避免了填充不良、熔接痕等成型缺陷。通过采用定模隧道抽芯、动模斜向抽芯以及斜顶延迟抽芯等多种侧向抽芯机构,成功解决了成型塑件的脱模困难。模具采用网格式及倾斜式冷却水道,成型周期由35 s缩短至30 s,大大提高了模具的生产效率。

关键词: 汽车后视座, 注塑模具, 预变形技术, 模流分析, 斜顶延迟抽芯

Abstract:

Aiming at the structural characteristics of the rearview mirror base of automobile as well as the problems occurring in their molding process, an optimization design was carried out for the mold structure. The problem of warpage deformation after plastic forming was solved with a pre?deformation technology. A reasonable and advanced pouring system was determined through the use of mold flow analysis, and the demolding problem was also solved by use of fixed?mode tunnel core, moving mode oblique core and the delayed pulling of diagonal push rod. By using a mesh format and a tilting cooling channel, the molding cycle was shortened from 35 s to 30 s.

Key words: rearview mirror base of automobile, injection mold, pre?deformation technology, molding analysis, delayed pulling of diagonal push rod

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