Shanghai Daoqin Plastics Co., Ltd.

        银纹 main/primary is raw materials drying 不彻底, water separation or formed separation formed (main/primary has water 汽, separation understanding gas, solvent agent gas, gas dry 扰). generate silver streaks 时, need use drying pellets material molding 实验, this 样尚不 can remove, can other causes.

         silver streaks generate specific causes separation lower:

        1, injection molding machine 方面:  

        (1) material 筒, screw abrasion loss or 胶头, 胶圈存 in material 流死角, long hot separation understanding.

        (2) add hot system 失控, formed temperature degree high separation understanding, 应检查 hot electrical 偶, hot and other add hot parts is has issues. screw design 不当, formed gas or easy belt/tape gas.

        2, mold 方面:  

        (1)排 gas defect;

        (2) mold in runner, gate, type abrasion scratch retardant force large, formed local hot 而出现 separation understanding;

        (3) gate, type distribution balanced, cooling system combined 理都会造 formed hot balanced 而出现 local hot or retardant gas 通道;

        (4) cooling 通路漏 water type 腔;

        (5) injection molding parts upper has 部份未塑化 plastics cold material, increase cold material dimensions; expand runner 尾部以形 formed add plastics cold material 穴; use power/electricity add hot and sleeve/set;

        (6) runner and gate small or long degree long, plastics in 输送时凝结, has need, increase runner and gate deep degree.

        3, process 方面:  

        (1)设置 temperature degree, pressure, speed degree, back pressure, 熔胶马达转 speed high formed separation understanding, or pressure, speed degree low, injection time, holding pressure separation, back pressure low 时, due to can obtain high pressure density 不足无 method understanding gas 体而出现银纹, 应设置适当 temperature degree, pressure, speed degree and time and using/adopting more injection speed degree.

        (2) back pressure low, speed fast easy make gas material 筒, material mold, cycle long melt material in material inner hot long 而出现 separation understanding, plastics in material time long, decrease/reduce cycle time; injection molding amount for injection molding requirements small (建议 use machine injection amount 20%～80%).

        (3) material amount 不足, add material 缓冲垫 large, material temperature low or mold temperature low effect/influence material flow and molding pressure, make bubbles formed.

        (4)熔胶 surface temperature degree high, reduce material temperature degree;熔胶 temperature degree low mold filling time unstable, increase high material temperature degree; increase high temperature degree; increase high mold filling speed degree

        (5) mold surface mold demolding agent more, use 白洒精彻底清洁 mold surface

         4, plastics 方面:  

        (1) plastics wet degree large, add recycled material ratio/proportion more or has has property material (屑 material easy separation understanding), separation drying plastics and remove material.

        (2) from large gas in or from color agent 吸潮, for color agent 也进行 drying, most good in machine upper drying device.

        (3) plastics in add lubricant, stabilizer and other use amount more or mixed combined 不均, or plastics belt/tape has property solvent agent. mixed combined plastics hot degree difficult 以兼顾时也会出现 separation understanding.

        (4) plastics 受污染, mixed has its it plastics.