薄壁电视机遥控器外壳的注塑模具设计与Moldflow仿真分析
刘丽丽 , 段闪闪 , 王井井 , 李子初 , 随岁寒
塑料科技 ›› 2026, Vol. 54 ›› Issue (4) : 175 -179.
薄壁电视机遥控器外壳的注塑模具设计与Moldflow仿真分析
Injection Mold Design and Moldflow Simulation Analysis of Thin-walled TV Remote Control Shell
根据薄壁电视机遥控器的结构工艺性分析,设计一款冷流道注塑模具,旨在研究特定外壳的脱模困难、薄壁注塑时出现欠注短射等缺陷问题。为满足高强度、耐磨性、绝缘性及大批量生产等需求,明确遥控器外壳的外形尺寸精度要求为MT5级,表面无划痕,确定脱模斜度为0.5°,材料选用丙烯腈-丁二烯-苯乙烯共聚物(ABS)塑料。模具采用一模两腔竖排布局,采用冷浇道浇注系统。内浇口选定为潜伏式,置于不易充型的多薄壁和卡扣处,选用圆形截面的分流道及Z型圆柱拉料杆。为了使4对对称卡扣顺利脱模,采用斜顶侧抽芯脱模机构以及循环式水道冷却。确定主要注塑工艺参数,通过Moldflow仿真分析结果可知,内浇口设置位置合理,充填时间小于5 s,流体前沿温度、整体变形以及收缩率结果均满足要求,避免欠注短射等缺陷的出现。
Based on the structural processability analysis of the thin-wall TV remote control, a cold runner injection mold was designed to investigate the demolding difficulties of the specific shell and defects such as short shots during thin-wall injection molding. To meet the requirements for high strength, wear resistance, insulation, and mass production, the dimensional accuracy requirement of the remote control shell was specified as MT5 grade, with a scratch-free surface, and the draft angle was determined to be 0.5°. Acrylonitrile-butadiene-styrene (ABS) plastic was selected as the material. The mold adopted a one-mold two-cavity vertical layout with a cold runner gating system. The sub-gate was designated as a submarine type, positioned at the multi-thin-wall and snap-fit locations that were difficult to fill. A circular-section runner and a Z-type cylindrical sprue puller were selected. To ensure smooth demolding of the four pairs of symmetrical snap-fits, an angled lifter side core-pulling demolding mechanism and a cyclic water cooling system were employed. The main injection molding process parameters were determined. According to the Moldflow simulation analysis results, the sub-gate location was rational, the filling time was less than 5 s, and the results for melt front temperature, overall deformation, and shrinkage all met the requirements, avoiding defects such as short shots.
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河南省高等学校重点科研项目(26B130002)
2025年度河南省本科高校精品课程建设项目(教高〔2025〕230号)
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