中国塑料 ›› 2025, Vol. 39 ›› Issue (6): 105-109.DOI: 10.19491/j.issn.1001-9278.2025.06.018

• 机械与模具 • 上一篇    

新能源汽车车门内板二次顶出注塑模设计

李清安(), 张维合   

  1. 广东科技学院,广东 东莞 523000
  • 收稿日期:2024-07-18 出版日期:2025-06-26 发布日期:2025-06-20
  • 作者简介:李清安(1985-),男,大学本科,讲师,从事新能源动力电池材料研究,liqingan5672@163.com
  • 基金资助:
    2022年东莞市工程技术研究中心项目(20221600402242);2023年度广东科技学院校级项目(GKY?2023KYZDK?12)

Design of two⁃step demolding injection mould for door inner panel of new energy vehicles

LI Qingan(), ZHANG Weihe   

  1. GuangDong University of Science & Technology,Dongguan 523000,China
  • Received:2024-07-18 Online:2025-06-26 Published:2025-06-20

摘要:

根据汽车车门内板的尺寸大小、结构特点和工艺要求,设计了一副超大型薄壁顺序阀控制的热流道注塑模具。模具脱模系统采用二次顶出机构,成功解决了喇叭孔对成型零件包紧力大、塑件脱模困难的难题。在塑件倒扣附近设计定位柱,成功消除了脱模过程中塑件被斜顶拉变形的故障。模具采用顺序阀控制热流道浇口进胶顺序和进胶口时间的智能浇注系统,有效解决了大型、狭窄型腔注塑模具熔体填充困难问题。模具采用24组由直通式水管、倾斜式水管和隔片式水井组成的冷却水路,纵横交错,冷却快速且均衡。模具成功投产,成型塑件精度达到了MT3(GB/T 14486—2008),注射周期降低了10 %。

关键词: 新能源汽车, 车门内板, 超大型注塑模具, 二次顶出, 顺序阀热流道, 定位柱, 侧向抽芯机构

Abstract:

This work presents the development of a large⁃scale injection mold incorporating sequential valve⁃gated hot runner (SVGHR) technology. There are two key challenges addressed, which included high clamping force and demolding complexity. A two⁃stage ejection system resolved excessive clamping force on the horn mesh structure and facilitated reliable part release. Integrated support columns within the part geometry eliminated the deformation caused by inclined ejector pin forces during demolding. SVGHR control ensured uniform filling of the large mold cavity, mitigating flow⁃related defects. A multi⁃channel cooling system with 24 interconnected circuits, including through⁃type, angled, and baffle⁃cooled wells, achieved rapid, balanced cooling through optimized vertical/horizontal routing. Production trials confirmed the dimensional accuracy of molded parts meeting MT3 standards according to the national standard GB/T14486—2008. Cycle time was reduced by 10 % compared to conventional molds.

Key words: new energy vehicles, door inner panel, supersized injection mould, two?stap demolding, sequential valve gate technology, the core pulling mechanism, positioning column

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