电视机面壳热流道直接进胶模具设计

摘要

In TV industry,the front cover mould normally uses hot runner of horn gate type to injection at present,which produces a large number of runner waste,resulting in waste of resources and the long injection cycle at the same time.Besides,there are residual flow channel at the automatically breaking gum,affecting the installation.After using the hot runner directly into the inverted mould structure,the glue position is on the back of the product.Thus,the hot glue material enters the product directly through the hot runner,without the cold runner,and the two ejection mechanism is designed in the rear mould.The waste of material is zero.About 35％ to 60％ raw materials can be saved.And the problem of the residual runner is completely avoided.While the quality of the product is improved,the cost of injection molding is also reduced.Meanwhile,the injection molding cycle time is shortened and efficiency is improved.%目前电视机行业里,面壳模具普遍采用热流道转牛角方式进胶,这种进胶方式产生大量流道废料,造成资源浪费的同时,注塑周期也比较长,且自动断胶处时有流道残留,影响装机.在采用热流道直接进胶倒装模具结构后,进胶位置在产品背面骨位上,热胶料通过热流道直接进入产品,无需转冷流道,并在后模设计二次顶出机构.模具设计实现了零流道废料,节省35％～60％原材料,同时完全避免了流道残留问题.在提高产品质量的同时,降低了注塑成本,缩短注塑周期,也提高了效率.