Shanghai Daoqin Plastics Co., Ltd.

injection molding parts molding process in 经常会 generate weld lines, weld lines is injection molding parts molding products most heavy molding defect 之一, it effect/influence products appearance quality, but also weld lines for products strong/high degree has effect/influence, and in coating and other rear 处理时, weld lines difficult 以处理, therefore must shrink short weld lines long degree. due to melt resin filling versus combined interface in surface upper, make strong/high degree and appearance reduce, is in 需承受 outer force or 者醒目 部位不 generate weld lines, will weld lines 移至不 effect/influence appearance and use strong/high degree 部位, can through CAE soft parts forecast weld lines 位置, again through products design or gate design, in design injection molding parts mold 时, can can generate weld lines separation to strong/high degree and appearance quality is important weld lines 常常发生 in injection molding parts molding melt resin combined 流 方, improve/increase injection pressure, material temperature degree and mold cavity temperature degree has 助于克服 injection molding parts 时浇注 system for melt flow retardant force, can has will injection holding pressure pressure to material front 端, make material combined can in relatively high pressure lower melt combined, from 而熔接痕处 density increase large, strong/high degree improve/increase;故 melt melt combined relatively good, attention/notes is, due to products structure requirements make weld lines / melt combined can 避免, through control versus 遇 两股 melt temperature degree 差(不 ultra- 10 -C), improve/increase injection pressure and mold cavity temperature degree and other process conditions make melt melt combined strong/high degree improve/increase 一.