电视USB支架的模流分析及模具设计

Moldflow Analysis and Mold Design of TV USB Support

以长条状的电视USB支架为例,其含有多孔和多个狭长凸台。利用moldflow软件从塑件的填充时间、流动前沿温度和翘曲变形三个方面对三种浇口设计方案进行对比分析,最终采用一模两腔和三个潜伏式浇口的最佳工艺方案。采用斜导柱侧向抽芯机构和斜顶杆抽芯机构分别成形带有侧孔和卡勾的狭长凸台。针对其他狭长凸台末端的气穴,采用成形镶块的间隙进行排气。利用UG软件设计模具各个结构,设计的模具结构合理,工作可靠。通过最终成形的产品验证了分析结果的正确性和模具设计方案的可行性。

Taking the long TV USB Support for example,it contains multiple holes and narrow bosses.By using moldflow software,three gate design schemes are compared and analyzed from three aspects:filling time,flow front temperature and warping deformation.Finally,the optimum process scheme of a two cavity and three subsurface gates was adopted.These long and narrow bosses with side hole and hook are formed by oblique guide pillar side core-pulling mechanism and oblique ejector rod core-pulling mechanism respectively;For the air cavitation at the end of other long and narrow bosses,the gap of forming inserts is used to exhaust air.Using UG software to design the mold structure,the design of the mold structure is reasonable and working reliably.The correctness of the analysis result and the feasibility of the mold design scheme are verified by the final forming product.