车灯可参数化点亮的内配光饰圈结构及模具设计  

Structure and mold design of inner lens for parameterized lighting of the car lamp

作　　者：何叶春 施凯文 唐高中 HE Yechun;SHI Kaiwen;TANG Gaozhong(SAIC GM Wuling Automobile Co.,Ltd.,Liuzhou 545000,China)

机构地区：[1]上汽通用五菱汽车股份有限公司,广西柳州545000

出　　处：《工程塑料应用》2024年第8期126-133,共8页Engineering Plastics Application

摘　　要：汽车车灯可参数化点亮设计是提升灯具科技感、品牌辨识度的有效方法之一,针对车灯系统里的内配光饰圈通过镭雕、烫印等后处理工艺实现参数化点亮造成的零件合格率低、生产效率低和成本昂贵问题,提出一种基于车灯内配光饰圈双色注塑成型工艺的解决方案。该工艺由非透光树脂注塑成型遮挡光路的饰圈基体,透光树脂注塑成型内配光饰圈的发光区域,饰圈基体镂空参数化形状填补透光树脂即形成参数化透光区域;此外,根据双色模具加工工艺和模具结构要求对参数化设计的双色搭接结构制定了工程限制模型,有效解决参数化特征周圈边界不连续的缺陷。本文基于零件结构设计了一套双色注塑模具,针对零件双色连接面倒扣结构、无脱模斜度面和一色成型件浇口导流道难以成型的问题,模具设计两套定模弹块机构分别成型一色成型件、二色成型件和浇口导流道;模具经过设计加工运用于实际生产,通过实践证明,该模具结构稳定可靠,零件质量满足设计要求,设计方案可为同类型产品开发提供参考,并具有较高工程实践指导意义。The parameterized lighting design of car headlights is one of the effective methods to enhance the technological sense and brand recognition of lighting fixtures.A solution based on the dual color injection molding process of the internal light distribution ring in the headlight system was proposed to address the problems of low part qualification rate,low production efficiency,and high cost caused by parameterized lighting through post-processing processes such as laser engraving and hot stamping.This process consists of a non transparent resin injection molding decorative ring matrix that blocks the light path,a transparent resin injection molding inner light distribution decorative ring's luminous area,and a hollow parameterized shape of the decorative ring matrix filling the transparent resin to form a parameterized transparent area.In addition,an engineering constraint model was developed for the parameterized design of the two-color overlapping structure based on the requirements of the two-color mold processing technology and mold structure,effectively solving the defect of discontinuous boundary of the parameterized feature circumference.A set of two-color injection molds based on the structure of the parts was designed.In order to solve the problems of the reverse buckle structure of the two-color connection surface,the non demolding slope surface,and the difficulty in forming the gate guide channel of the one-color formed parts,two sets of fixed mold spring block mechanisms were designed for the mold to respectively form the one-color formed parts,the two-color formed parts,and the gate guide channel.The mold was designed,processed,and applied in actual production.Through practice,it has been proven that the structure of the mold is stable and reliable,and the quality of the parts meets the design requirements.The design scheme can provide reference for the development of similar products and has high engineering practice guidance significance.

关 键 词：参数化 内配光饰圈 双色注塑模具 浇口导流道 定模弹块 

分 类 号：TQ315[化学工程—高聚物工业]