Shanghai Daoqin Plastics Co., Ltd.

溢 material also flash, 溢边, and other, large more in mold separation combined upper, 如: mold separation type 面, slip block slip 配部位, parts 缝隙, 顶杆 孔隙 and other 处. material and solution will 会进一步 expand large 化, from pressure mold formed local 陷塌, formed property loss 害. parts and 顶杆孔隙 溢 material also make products in upper, effect/influence demolding. equipment (1) machine true positive clamping force 不足. selection injection molding machine 时, machine clamping force must high injection molding products toward 投影面积 in injection formed force, will formed 胀模, flash. (2) clamping plant/unit adjustment 不佳, machine has 伸直, generate or left right or upper lower clamping 不均衡, mold degree can to phenomenon formed tool mono 侧一边 by combined 紧而另一边不密贴 情况, injection will flash. (3) mold 本身平行 degree 不佳, or 装 不平行, or sheet/plate 不平行, or 拉杆受 force distribution 不均, deformation 不均, this will formed clamping 不紧密而 generate flash. (4) ring abrasion loss heavy; elastic nozzle elastic 簧失效; material or screw abrasion loss large; material cooling system 失效造 formed “架桥” phenomenon; machine 筒调定 注 material amount 不足, 缓冲垫 small and other can can formed flash 反复出现, must and repair or more parts. mold (1) mold separation type degree 差. active sheet/plate (如 in sheet/plate) deformation warpage; separation type upper has material or frame has 凸出 橇印毛刺; mold 因早先 flash pressure make type 腔周边 fatigue 塌陷. (2) mold design combined 理. mold type 腔 开设位置 偏, injection mold mono 边发生张 force, flash; plastics flow property good, polyethylene (PE), polypropylene (PP), nylon and other, in melt lower degree very low, easy active or solid 定 缝隙, requirements mold manufacturing degree relatively high; in effect/influence products property front lower amount in quality for in upper, in products thick 实 部位入 material, can anti 止一边缺 material belt/tape flash 情况; products in or its has molding 孔时, upper in upper 开设侧 gate, in relatively large injection pressure lower, if clamping force 不足模 this separation function force 不够发生 light micro warpage formed flash, mold belt/tape has active parts 时, its 侧面 投影面积也受 molding pressure as use, if force 不够也会造 formed flash; sliding type combined degree defect or solid type and type 腔安装位置偏移而 generate flash; type gas defect, in separation type upper has gas or gas shallow or deep large or material retardant will formed flash; for more type mold attention/notes separation runner combined gate combined design, will formed 充模受 force 不均而 generate flash. process (1) injection pressure high or injection speed degree fast. due to high pressure high speed, for mold force increase large 导致溢 material. need according to products thick thin adjustment injection speed degree and injection time, thin products need use high speed speed 充模, rear again 进注; thick products need use low speed 充模, let table/sheet in to pressure front large solid lower. (2) add material amount large formed flash. value attention/notes is need is anti 止凹陷而注入 more material, this 样凹陷未必 can “填平”, 而飞 边却会出现. this type of application long injection time or holding pressure time solution. (3) machine 筒, nozzle temperature degree high or mold temperature degree high make plastics degree decline, flow property increase large, in 流畅进模 情况 lower formed flash. 四, raw materials (1) plastics degree high or low can can flash. degree low plastics nylon, polyethylene (PE), polypropylene (PP) and other, improve/increase clamping force; water property strong/high plastics or for water plastics in high temperature lower large degree reduce flow degree, increase flash can can property, for this plastics must drying; 掺 入 recycled material more plastics degree decline, necessary need 补充滞留 formed separation. plastics degree high, flow retardant force increase large, generate large back pressure make 模 腔 pressure improve/increase, formed clamping force 不足而 generate flash. (2) plastics raw materials degree large small 不均时会 make add material amount 变化不定, made parts or 不满, or flash.