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anti transparent plastics parts processing defect!
一, cracks and filament 纹
(1) raw materials separation drying. 应适当 improve/increase drying temperature degree, and long drying time.
(2) raw materials inner mixed has material 杂质. 应彻底清 remove.
(3) material temperature degree high. 应适当 reduce molding temperature degree and adjustment material temperature degree distribution.
(4) injection pressure low. 应适当 improve/increase.
(5) system design combined 理. combined adjustment gate and runner and large small.
(6) molding cycle long. 应适当 shrink short.
(7) screw back pressure high or low. 应适当 adjustment.
二, and 雾晕
(1)熔 material temperature degree low. 应适当 improve/increase molding temperature degree.
(2) injection pressure low. 应适当 improve/increase.
(3) screw back pressure low. 应适当 improve/increase.
(4) mold temperature degree low. 应适当 improve/increase.
(5) raw materials inner mixed has material 杂质. 应彻底清 remove or use new material.
(6) raw materials in water separation and easy material content high. 应进行 drying 处理.
(7) material and its temperature degree distribution combined 理. 应适当 adjustment.
三, 熔接痕 and material 痕
(1)熔 material temperature degree low. 应适当 improve/increase molding temperature degree.
(2) injection pressure low. 应适当 improve/increase.
(3)供 material amount 不足. 应适当 increase material amount or use specifications relatively large injection molding machine.
(4) holding pressure time short. 应适当延 long.
(5) increase pressure time short. 应适当延 long,
(6) system 设置不 combined 理. 应改进 runner 形式, gate heavy new 选位开口.
(7) gate and runner has retardant material. 应彻底清 remove.
(8) mold temperature degree low. 应适当 improve/increase.
(9) mold gas defect. increase gas or reduce clamping force. in clamping or 熔接点处开排 gas.
四, 漩纹
(1)熔 material temperature degree high or low. 应适当 adjustment.
(2)供 material amount more. 应适当 decrease/reduce.
(3) gate 定位不当. heavy new 选位开口.
(4) gate runner inner has retardant material. 应彻底清 remove.
(5) nozzle retardant 塞. 应进行清理.
(6) mold temperature degree low. 应适当 improve/increase.
五, and strip/profile 纹
(1) raw materials inner mixed 入杂质. 应彻底清 remove.
(2)熔 material temperature degree high or low. 应适当 adjustment.
(3) material 筒各区段 temperature degree distribution combined 理. 应适当 adjustment.
(4) injection pressure high or low. 应适当 adjustment.
(5) runner and gate 截面太 small. 定位不当, flow retardant force large. 应适当放 large gate and runner 截面, 检查浇道 inner has retardant material.
(6) mold gas defect. 应适当 increase gas 孔, improvement mold gas property can.
(7) material and nozzle local has hot and material 死角. remove material 死角, remove hot 点.
六, surface coarse and gloss defect
(1)熔 material temperature degree low. 应适当 improve/increase molding temperature degree.
(2) injection pressure low. 庆适当 improve/increase.
(3) mold temperature degree low. 应适当 improve/increase.
(4)供 material 不足. 应适当 increase.
(5) gate 定不当. heavy new 选位开口.
(6) cooling time 不足. 应适当延 long.
(7)浇道 inner has retardant material. material 充模不畅. 应清理 mold retardant material.
(8) mold type surface light degree 太差. abrasion light, improve/increase surface light degree.
七, bubbles and shrink 孔
(1) raw materials separation drying. 应进行 drying 处理, 并适当 improve/increase drying temperature degree and long drying time.
(2)熔 material temperature degree high. 应适当 reduce molding temperature degree.
(3) injection pressure low. 应适当 improve/increase.
(4) holding pressure time short. 应适当延 long.
(5)浇道 inner has retardant material. 应彻底清理.
(6) mold temperature degree low. 应适当 improve/increase.
(7)塑 parts in mold inner cooling time long. 应适当 shrink short, most good will demolding rear parts in hot water in cold.
八, delamination
(1) raw materials inner mixed material 杂质. 应彻底清 remove or use new material.
(2)供 material 不足. 应适当 increase or use specifications relatively large injection molding machine.
(3) mold temperature degree low. 应适当 improve/increase.
