Shanghai Daoqin Plastics Co., Ltd.

nylon 6 injection molding drying 处理:

due to nylon 6 very easy absorption water separation, therefore processing front drying especially need attention/notes. if nylon plastics is use anti water material packaging supply, container maintain 密闭. if wet degree large 于0.2%, in 80C above hot gas in drying 16 small 时. if nylon plastics already in gas in ultra- 8 small 时, 建议进行105C, 8 small above true dry.

nylon 6 plastics injection molding process parameters

熔 material temperature degree: 240-250℃, for/regarding reinforcement product types is 250~280C.
　　 material temperature: 220℃
　　 mold temperature degree: 60-100℃. mold temperature degree very significantly effect/influence crystallization degree, crystallization degree also effect/influence parts machine features. for/regarding structure parts crystallization degree very important, therefore mold temperature degree is 80~90C. for/regarding thin 壁, process/workflow relatively long parts 也建议施 use relatively high mold temperature degree. increase large mold temperature degree can improve/increase parts strong/high degree and rigid degree, reduce tough property. if thick large 于3mm, use 20~40C low temperature mold. for/regarding reinforcement material mold temperature degree large 于80C.
　　 injection pressure: 100-160MPa（1000-1600bar）, if is processing thin long runner products （如 electrical belt/tape ）, need to 180MPa（180bar）.
　　 holding pressure pressure: injection pressure 50%; generally in 750~1250bar between （取决于材 material and product design ）, due to material versus for relatively fast, short holding pressure time already 足够. reduce holding pressure pressure can decrease/reduce products internal stress.

　　 screw speed: screw speed high, speed degree is 1m/s; however, most good will screw speed low 一点, need can in cooling time front formed process can; requirements relatively low screw 转矩.
　　计 amount 行程: 0.5-3.5D
　　残 material amount: 2-6mm却决于计 amount and screw 直径.
　　 back pressure: 2-8MPa（20-80bar）, need adjustment, is back pressure high formed 塑化不均.
　　 injection speed degree: using/adopting versus for relatively fast injection speed degree; mold has good gas property products upper already 出现焦化 phenomenon. high speed （ for reinforcement type material need micro reduce ）.
　　预烘 dry: in 90℃ temperature degree lower dry 4h, remove from material container inner material; nylon has water property, 应该保存 in anti container inner and material inner; water has ultra- 0.25%就会造 formed molding 改变.
　　 recycling rate: can add 入10%回 material.
　　 shrinkage rate: 0.7%-2.0%; or add 30% glass fiber, shrinkage rate is 0.3%-0.8%; if provide temperature degree ultra- 60℃, products is cooling; cooling can reduce molding rear shrinkage. products performance is more good dimensional stability and small internal stress; using/adopting method; nylon products can through liquid agent 检查应 force.
　　 gate system: 点式, 潜伏式, sheet/slice and gate can; use and gate 窝 段 cold material 点; can use hot runner; due to material can processing temperature degree scope/range narrow, hot runner provide ring temperature degree control. due to nylon 6 凝 solid time very short, therefore gate non important. gate 孔径不 need small 于0.5*t（ this 里t is parts thick degree ）. if use hot runner, gate dimensions ratio use runner small 一, is hot runner can 够帮助 retardant material solid. if use 潜入式 gate, gate most small 直径应当 is 0.75mm.
　　 material equipment: standards screw, 特殊几何 dimensions has relatively high can force; ring, nozzle; for add glass fiber reinforcement material, need high wear resistant di metal material 筒
　　 machine time 段: use its it material 清洗; material in material inner time can 达20min, rear thermal degradation easy 发生.

nylon 6 typical applications scope/range:
　　 due to has very good machine strong/high degree and rigid degree by used for structure parts. due to has very good wear resistant loss features, also used for manufacturing bearings.