Shanghai Daoqin Plastics Co., Ltd.

this is 一 经常遇 to issues, comparison easy solution. use process 手段确实 solution 不 时, can from injection molding parts mold design manufacturing upper 考虑进行改进, generally is can solution. 一, equipment 方面: （1） injection molding parts machine 塑化容 amount small. products quality ultra- injection molding parts machine most large injection quality 时, 显然 供 material amount is 入不敷出. products quality injection molding parts machine injection quality 时, has 一 塑化不够充 separation issues, material in machine inner hot time 不足, 结果不 can and toward injection molding parts mold provide 适当 熔 material. this type of has more amount large injection molding parts machine can solution issues. has plastics nylon （ especially is nylon 66 ）熔 melt scope/range narrow, ratio hot relatively large, use 塑化容 amount large injection molding parts machine can ensure material supply. （2） temperature degree 计显示 temperature degree true 实, high low, formed material temperature low. this is due to temperature plant/unit hot electrical and its or temperature milli 伏计失灵, or is due to 远离测 temperature electrical hot aging or 烧毁, add temperature 失效而 also 未曾发现 or has and 时修复 more 换. (3) nozzle inner 孔直径太 large or small. small, due to 流通直径 small, material strip/profile ratio increase large, easy cold, 堵塞进 material or consumption injection pressure; large, 则流通截面积 large, plastics mono 位面积 pressure low, formed force small 状况. meanwhile non type plastics 如ABS因没 has obtain large hot can make degree decline formed 充模困 difficult. nozzle and runner 入口配 combined defect, 常常发生模 outer material, inner 充不满 phenomenon. nozzle flow retardant force very large or has material, plastics 炭化沉积 material and other 堵塞; nozzle or runner 入口球面 loss 伤, deformation, effect/influence and for 方 良 good combined; base/seat machine fault/failure or 偏差, make nozzle and runner generate 倾侧位移 or toward pressure 紧面脱离; nozzle ratio runner 入口球径 large, 因边缘出现间隙, in material lower increase large nozzle toward force 都会造 formed products 注不满. （4） plastics block add material 通道. due to plastics in material drying device inner local 熔化结 block, or machine material temperature degree high, or plastics and other grade selection 不当, or plastics inner lubricant more make plastics in 进入进 material shrink 径位置 or screw 起螺端 deep inner 早 熔化, material and material versus 黏结形 formed “ 桥”, 堵塞通道 or screw, screw as sliding, can front 移, formed material in or random 则波动. this type of has in 凿通通道, troubleshooting material block rear can to solution. （5） nozzle cold material 入模. injection molding parts machine usually 都因顾 and pressure loss 失而 装直通式 nozzle. is if machine front and nozzle temperature degree high, or in high pressure lower machine front material more, generate “流涎”, make plastics in 未开始 injection injection molding parts mold 敞开 情况 lower, outer 抢先进入主 runner 入口并 in sheet/plate cooling function lower hard, 而妨碍熔 material 顺畅 进入 type 腔. this 时, reduce machine front and nozzle temperature degree and decrease/reduce machine 筒 储 material amount, decrease low back pressure pressure machine front material density large. （6） injection molding parts cycle short. due to cycle short, material temperature and upper 也会造 formed material, in electrical pressure large especially obvious. need according to electrical electrical pressure for cycle as versus adjustment. adjustment generally 不考虑 injection and holding pressure time, main/primary adjustment from holding pressure to screw that time, effect/influence molding conditions, also can long or shrink short material in machine inner preheating time.