基于多重滑块与复合抽芯的汽车水室模具设计  

Mould design of automobile water chamber based on multiple sliders and composite core pulling

作　　者：彭贤峰[1] 符立华[1] 李朋 傅莹龙 任建平[1] PENG Xianfeng;FU Lihua;LI Peng;FU Yinglong;REN Jianping(Taizhou Vocational College of Science and Technology,Taizhou 318000,China;Ningbo Runhua Full Core Microelectronics Equipment Co.,Ltd.,Ningbo 315000,China)

机构地区：[1]台州科技职业学院,浙江台州318000 [2]宁波润华全芯微电子设备有限公司,浙江宁波315000

出　　处：《工程塑料应用》2025年第3期140-145,共6页Engineering Plastics Application

基　　金：2024年度高校国内访问工程师“校企合作项目”(FG2024359);台州市科技计划项目(24gyb27)。

摘　　要：根据某款汽车水室塑件的结构特征与技术要求,设计了一副单点大水口直接进胶的注塑模具,由于塑件结构复杂,采用了一模一腔的布局。在定模侧设计了两个独立的抽芯油缸,其中一个油缸的抽芯运动行程为45 mm,另一油缸的行程为22 mm,在此基础上设计了两组复合抽芯机构,解决了塑件进水口侧管特征的局部区域因存在多向脱模而导致脱模机构设计空间受到限制的问题。在动模侧整体设计了5组滑块抽芯的结构,重点设计了一组由双重叠滑块和三重叠滑块组合的脱模机构来成型塑件的外部特征,前者由一根斜导柱驱动,后者先通过斜导柱驱动,然后通过油缸来进行驱动。在顶出系统上通过定距拉钩的结构设计实现了塑件的二次顶出,并且将模具的顶出板与注塑机的顶出杆采用螺杆固定连接,在模具结构上节省了顶出油缸的设计。冷却系统设计方面,在型芯的两个小镶块内部设计了2组内径为4 mm、外径8 mm的“喷泉式”水路,其余水路采用了“直通式+隔水片式”的组合。经试模后,该汽车水室塑件表面无不良缺陷,平口的平面度符合要求,证明该模具的重叠滑块结构与复合抽芯结构设计方案可行。According to the structural characteristics and technical requirements of a certain automobile water chamber plastic part,a pair of injection mould with single point and large gate for direct injection was designed.Due to the complex structure of the plastic part,the layout of one mould and one cavity was adopted.Two independent core pulling cylinders were designed on the fixed mould side,with one cylinder having a core pulling motion stroke of 45 mm and the other cylinder having a stroke of 22 mm.Based on this,two sets of composite core pulling mechanisms were designed to solve the problem of limited design space for the demoulding mechanism caused by multi-directional demoulding in the local area of the side pipe characteristics of the plastic part inlet.Five sets of slider core pulling structures were designed on the moving mould side,with a focus on designing a demoulding mechanism consisting of a combination of double overlapping sliders and three overlapping sliders to form the external features of the plastic parts.The former was driven by an angle pin,while the latter was first driven by the angle pin and then driven by an oil cylinder.The secondary ejection of plastic parts was achieved through the structural design of fixed distance draw hooks in the ejection system,and the ejector plate of the mould was fixedly connected to the ejection rod of the injection molding machine using screws,saving the design of the ejection cylinder in the mould structure.In terms of cooling system design,two sets of"fountain style"waterways with an inner diameter of 4 mm and an outer diameter of 8 mm were designed inside the two small inserts of the core,for the rest of the waterways,a combination of"straight through type+water-resistant plate"was used.After trial molding,there are no defects on the surface of the plastic part of the automobile water chamber plastic part,and the flatness of the flat end opening meets the requirements,proving that the design scheme of the overlapping slider structure and composite core pull

关 键 词：汽车水室 复合抽芯 定距拉钩 三重叠滑块 二次顶出 

分 类 号：TQ320.52[化学工程—合成树脂塑料工业]