抽真空注塑模具设计及应用研究
2020-03-13张辈钦
张辈钦


摘 要:文章以挂壁隐藏水箱异形魔力石(装饰盖板)为例,介绍抽真空注塑模具的设计过程,包括模具结构的确定、浇注系统设计、冷却及推出加气顶方式的确定、抽真空部分的设计。重点讲抽真空部分及借助保压补缩阶段实现壁厚处填充的注塑工艺,提高注塑周期等技术要点,并分析了该模具的设计理念及推广应用前景,对类似结构的零部件开发具有极高的参考意义与应用价值。
关键词:抽真空;保压补缩;注塑模具
中图分类号:TQ320.6 文献标志码:A 文章编号:2095-2945(2020)08-0087-02
Abstract: Taking the special-shaped magic stone(decorative cover plate) of the hanging wall hidden water tank as an example, this paper introduces the design process of the vacuum injection mold, including the determination of the mold structure, the design of the gating system, the cooling and the way of pushing out the air top, and the design of the vacuum part. This paper focuses on the vacuum part and the injection molding process of filling the wall thickness with the help of the pressure filling stage, improving the injection cycle and so on, and analyzes the design concept and application prospect of the mold. It has high reference significance and application value for the development of parts and components with similar structure.
Keywords: vacuum; packing and shrinkage; injection mold
引言
在這大数据信息化时代,随着新技术的兴起及生活水平的提高。人们更青睐于品质优越、节能环保、安全、时尚的产品。消费习惯和模式的转变也促使科技创新、产品升级与换代。作者以挂壁隐藏水箱异性魔力石(装饰盖板)为例介绍其注塑模具的设计过程、注塑成型要点。探讨从模具、注塑工艺的改进以实现精益生产。
1 塑件工艺分析
图1为异性装饰盖板轴测图,采用ABS塑料成型。塑件的技术要求为:表面光滑、无气孔、缩水等缺陷。从图l中可看出,塑件壁厚均一,利于填充,但是5个BOSS孔处,壁厚较厚。表面易产生缩痕及内部有气孔,且会影响注塑周期。必须加强此处冷却以提高效率。本文采用抽真空形式加借助保压补缩阶段实现壁厚处填充的工艺来解决此缩痕和内部缩孔不良,且可以缩短冷却时间,一举两得。
2 模具结构设计
综合考虑塑件的技术要求及模具和注塑的可行性。……
