Shanghai Daoqin Plastics Co., Ltd.

         in manufacturing products generate gas causes

        ①进 material system in material material belt/tape gas or type in has gas, in formed processing 时, also has and will runner, type in gas 体排出.

        ② resin in drying separation, has water separation, in injection temperature degree lower, 蒸发而 formed is water gas.

        ③ injection temperature degree relatively high, plastics separation understanding generate gas 体.

        ④ resin in certain additives, or chemical reaction formed gas 体(如 hot solid property plastics formed 形时, not only plastics 本身含 has water separation and formed separation, but also in solid process polycondensation reaction, generate shrink combined water and low separation 子挥发 gas 体).

        ⑤ resin in gas 体.

         mold gas defect rear 果:

        ① gas 体经受 large pressure shrink generate pressure, this type of pressure increase melt material 体充模 flow retardant force, retardant melt plastics positive fast speed 充模, make mold type can 充满, plastics 棱边不清.

        ② products upper obvious can flow and combined 缝, made parts force property can decline.

        ③ gas pressure shrink rear, 会渗人 to plastics inner 层, make plastics generate 银纹, gas 孔, hydrophobic 松, and other surface quality defect.

        ④ type inner gas to pressure shrink rear, generate hot amount make plastics local temperature degree upper rise, plastics melt separation understanding color, 甚至烧焦 carbon 化.

        ⑤ 排 gas defect, reduce speed degree, increase made parts formed cycle (especially is high speed injection molding), heavy effect/influence production efficiency.