中国塑料 ›› 2025, Vol. 39 ›› Issue (9): 129-133.DOI: 10.19491/j.issn.1001-9278.2025.09.020

• 机械与模具 • 上一篇    

新能源汽车后视镜内支架大型精密注塑模设计

杨帆(), 张维合()   

  1. 广东科技学院,广东 东莞 523000
  • 收稿日期:2024-09-26 出版日期:2025-09-26 发布日期:2025-09-22
  • 通讯作者: 张维合,allenzhang0628@126.com
    E-mail:344653720@qq.com;allenzhang0628@126.com
  • 作者简介:杨帆(1986-),男,大学本科,讲师,从事新能源电池材料及模具研究, 344653720@qq.com
  • 基金资助:
    2022年东莞市工程技术研究中心项目(20221600402242)

Design of large and precision injection mold for car rearview mirror substrate

YANG Fan(), ZHANG Weihe()   

  1. GuangDong University of Science & Technology,Dongguan 523000,China
  • Received:2024-09-26 Online:2025-09-26 Published:2025-09-22
  • Contact: ZHANG Weihe E-mail:344653720@qq.com;allenzhang0628@126.com

摘要:

根据汽车后视镜内支架尺寸精度高、结构复杂、侧向倒扣尺寸大且方向倾斜的结构特点,设计了一副大型精密复杂的注塑模具。模具采用定模弹块机构,消除了成型塑件黏连定模型腔的故障;模具采用随形水路温度控制系统,消除了成型塑件的熔接痕及变形缺陷,提高了成型塑件尺寸精度;模具通过加大侧向抽芯滑块的安全距离,消除了成型塑件脱模时和滑块碰撞的故障。模具结构先进、科学,有一定的创新性,第一次试模成功,投产后运行安全平稳,成型塑件精度达到了MT2(GB/T 14486—2008),提高了一级,注射周期30 s,下降了10 %。

关键词: 后视镜内支架, 大型精密注塑模具, 定模弹块, 温度控制系统, 侧向抽芯机构

Abstract:

To meet the structural requirements of a car rearview mirror bracket, characterized by high dimensional accuracy, complex geometry, large lateral buckle size, and directional tilt, a large, high⁃precision, and complex injection mold was designed. In this mold, a fixed⁃mold spring block mechanism was used to prevent sticking between the fixed mold and molded parts. A near⁃conformal water temperature control system was designed to eliminate weld lines and part deformation. An increased slider safety distance was designed to avoid collisions during demolding. The mold achieved a successful first trial, operating smoothly in production with molded parts meeting MT2 precision (GB/T14486—2008). The injection cycle was reduced by 10 % to 30 s, demonstrating the mold’s advanced, scientific, and innovative design.

Key words: rearview mirror substrate, Large and precise injection molds, spring block of fixed modulus, temperature control system, side core pulling mechanism

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