中国塑料 ›› 2021, Vol. 35 ›› Issue (2): 101-106.DOI: 10.19491/j.issn.1001-9278.2021.02.017

• 机械与模具 • 上一篇    下一篇

四面六倒扣异形件二级侧抽芯注射模设计

熊毅1,2(), 王伟2   

  1. 1.河南省材料成形装备智能技术工程研究中心,河南 南阳 473009
    2.河南工业职业技术学院,河南 南阳 473009
  • 收稿日期:2020-06-11 出版日期:2021-02-26 发布日期:2021-02-22
  • 基金资助:
    年河南省科技攻关计划项目(212102210372)

Design of Two⁃stage Side Core⁃pulling Injection Mold for Special⁃shaped Parts with Four Sides and Six Undercuts

XIONG Yi1,2(), WANG Wei2   

  1. 1.Henan Material Forming Equipment Intelligent Technology Engineering Research Center,Nanyang 473009,China
    2.Henan Polytechnic Institute,Nanyang 473009,China
  • Received:2020-06-11 Online:2021-02-26 Published:2021-02-22
  • Contact: XIONG Yi E-mail:smartxiongyi@163.com

摘要:

针对支承壳体异形件中四面均有大面积倒扣的结构难点,根据倒扣的脱模方向,将侧面所有区域分配到6个滑块S1~S6中成形。产品右侧2个滑块S2、S3脱模方向不一致、成形面积较大,设计了斜导柱+液压缸的二级顺序抽芯机构。产品左侧倒扣由滑块S5成形,隧道滑块S6成形局部圆孔,位于主滑块S5中;开模时,由于滑块S5中斜导柱孔的间隙使其抽芯延迟,弹簧驱动滑块S6完成抽芯后,滑块S5开始运动,弹簧+斜导柱的顺序结构简化了二级抽芯机构。最后,设计了1模2腔纵向布局、潜伏式浇口进料、斜向推出的单分型热流道注射模,通过一次开模即完成所有滑块的侧向运动。结果表明,模具结构简单、工作稳定、自动化程度高。

关键词: 壳体, 倒扣, 滑块, 二级抽芯, 液压缸, 弹簧, 延迟

Abstract:

Aim at the difficulty in the large area of undercut in all four sides of the supporting shell in the mold design, we design a scheme to divide all of the side areas into 6 sliders S1~S6 for molding according to the demolding direction. Owing to two sliders on the right side of the product, S2 and S3, with inconsistent stripper directions and large molding areas, a two-stage sequential core-pulling mechanism with an inclined guide column + hydraulic cylinder was designed. The left side of the product was formed by slider S5, and a local round hole was formed by the tunnel slider S6, which was located in the main slider S5. When the mold was opened, the core?pulling delay was caused by the gap between the holes of the slider angle pin in the slider S5. After the core?pulling action was completed by the spring?driven slider S6, the slider S5 starts to move. The sequential structure of the spring+slider angle pin simplified the secondary core?pulling mechanism. Finally, a single parting hot runner injection mold was designed with a longitudinal layout of one mold and two cavities, a latent gate feeding, and an oblique pushing out. The lateral movement of all the sliders was completed by a single opening of the mold. The mold has a simple structure with a good stability in operation and a high degree of automation.

Key words: shell, undercut, slider, secondary core pulling, hydraulic cylinder, spring, delay

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