Shanghai Daoqin Plastics Co., Ltd.

         mold temperature degree is injection molding in most need amount ----无论 injection molding types plastics, must ensure formed mold surface basic wet lubricating. hot mold surface make plastics surface long time maintain liquid 态, in type inner formed pressure. if type 腔填满 but also in table/sheet hard front, type pressure can will soft/flexible plastics pressure in metal upper, that type surface made high.

        另一方面, if in low pressure lower type plastics 暂停, time more short, that it and metal light micro 接触都会造 formed 污点, has by is gate 污斑.

         for/regarding types plastics and plastics parts, in mold surface temperature degree 极限, ultra- this 极限就 can can 出现一 types or more more defect effect/influence (例如: parts can flash/burrs). mold temperature degree more high flow retardant force more small.

         in many injection molding machine upper, this 自然就意味 more fast gate and type 腔, is use injection molding flow control 阀并不纠 positive this 改变, filling more fast in and type inner more high has pressure.

         can can formed material flash/burrs. due to more hot type 并不冻结 that in high pressure formed front 进入溢 material 边区域 plastics, material can in ejection 杆周围溢 material flash/burrs 并溢出 to separation 割线间隙 inner. this table/sheet need has good injection speed rate control, 而一 现代化 flow control device 也确实 can to this 点.

         usually, mold temperature degree rise high decrease/reduce plastics in type inner has cold 凝层, make melt material in type inner more easy flow, from obtain more large parts weight and more good surface quality. meanwhile, mold temperature degree improve/increase also make parts force strong/high degree increase.

         mold temperature methods

         many mold, especially is engineering use thermoplastic property plastics, in versus for relatively high temperature degree lower 运行, 如80摄氏 degree or 176华氏 degree. if mold has temperature, to gas and injection molding machine upper hot amount can very easy and material 缸流失 一样 more.

         therefore need will mold skeleton/framework sheet/plate thermal insulation, if can can, will mold surface thermal insulation hot. if use hot runner mold, decrease/reduce hot runner separation and cooling injection molding parts between hot amount 交换. this methods can decrease/reduce can amount and preheating time.