汽车空调控制面板双色倒装热流道注射模设计  

Design of dual-color inverted hot runner injection mould for automobile air conditioning control panel

作　　者：张跃飞[1] 刘敬祺 胡光良 朱少军 严胜义 ZHANG Yuefei;LIU Jingqi;HU Guangliang;ZHU Shaojun;YAN Shengyi(Zhejiang Industry and Trade Vocational College,Wenzhou 325003,China;Zhejiang Changjiang Automobile Electronic System Co.,Ltd..,Wenzhou 325025,China)

机构地区：[1]浙江工贸职业技术学院,浙江温州325003 [2]浙江长江汽车电子有限公司,浙江温州325025

出　　处：《工程塑料应用》2024年第7期116-123,共8页Engineering Plastics Application

基　　金：先进模具CAX创新团队项目(CX202102)。

摘　　要：汽车空调控制面板作为人机交互界面不可或缺的操作零件,设计时为了集成使用功能和外观美感等多重要求,一般设计为双色注塑件。以某汽车内饰空调控制面板为例,设计了一副双色倒装热流道注塑模,并详细介绍了零件结构特征、模具结构设计方案及工作原理。由于零件结构特殊性和注塑材料成型温度差异,塑件在成型过程中采用传统正置成型方案时表面易出现串色、印痕等缺陷,成型良品率较低,故模具采用倒装结构设计方案,即第一色先成型茶色透明的聚碳酸酯(PC)外观部分,再成型第二色黑色的PC/丙烯腈-丁二烯-苯乙烯塑料(ABS)基体部分。基于模具的倒装结构,其第一、二色均采用热流道系统进料,同时为了确保零件顺利生产、顶出顺畅,在第一色子模内设置拉料柱和预压型推出机构,第二色子模具的定模侧设计了斜顶和顶针联合顶出机构,利用油缸驱动实现塑件脱模。实验证明,该倒装双色热流道注塑模整体结构稳定可靠,塑件批量生产质量满足设计要求。As an indispensable operating part of the human-machine interface,the automobile air conditioner control panel had been generally designed as a dual-color injection moulding part in order to integrate multiple requirements such as functionality and aesthetics.Taking an automotive interior air conditioning control panel as an example,a pair of dual-color inverted hot runner injection moulds were designed,and the structural characteristics of the parts,the mould structure design scheme and the working principle were introduced in detail.Due to the special structure of the part and the difference in the temperature of the injection moulding materials,the surface of the plastic parts in the moulding process using the traditional orthotropic moulding solution was prone to defects such as stringing of colors,stress marks.Because of a low moulding yield,so the mould adopted the inverted structural design,the first color was moulded into the tawny transparent polycarbonate(PC)appearance part first,and then the second color was moulded into the black PC/acrylonitrile-butadiene-styrene copolymers(ABS)substrate part.Based on the inverted structure of the mould,both the first and second colors were fed by hot runner system.Meanwhile,in order to ensure the smooth production and ejection of the parts,a pulling sprue and a pre-pressure demoulding mechanism were set up in the first color sub-mould,and the second color sub-mould was designed with a joint demoulding mechanism including angle from pins and ejector pins,which was driven by a cylinder to achieve the release of the moulded parts.Practice has proved that the overall structure of the inverted dual-color hot runner injection mould is stable and reliable,and the quality of the mass production of plastic parts meets the design requirement.

关 键 词：空调控制面板 双色注塑 倒装模具 热流道 联合顶出机构 

分 类 号：TQ330.41[化学工程—橡胶工业]