Shanghai Daoqin Plastics Co., Ltd.

         injection molding mold in has gas generate, can can and below/following has 关.

        (1)浇注 system and mold type in has gas.

        (2) has raw materials has has by drying troubleshooting water separation, it in high temperature lower gas formed water gas.

        (3) due to in injection molding temperature degree high, certain property unstable plastics 会发生 separation understanding generate gas 体.

        (4) plastics raw materials in certain additives or versus chemical reaction formed gas 体.

        2, meanwhile gas defect 不畅 缘由,也 need fast 找出. injection molding 模 排 gas defect to parts belt/tape 困扰. main/primary performance lower:

        (1) in injection molding process in melt will type in gas 体, if gas 体排出不 and will formed melt 充填困 difficult,导致 injection amount 不足而不 can type 腔.

        (2) troubleshooting gas in type in formed high pressure, and in pressure shrink degree lower 渗入至 plastics internal,造 formed 空洞, gas 孔,组织 hydrophobic and and other quality defect.

        (3) due to gas by high degree pressure shrink, make type inner temperature degree upper rise,进而引起周围 melt separation understanding, 烧灼, make parts local carbon and phenomenon. it main/primary in melt combined 流处, gate 凸缘处.

        (4) gas troubleshooting 不畅, make 进入各 type melt speed degree different, therefore easy formed flow and combined 痕,并 make parts force property can reduce.

        (5) due to type in gas retardant 碍,会 reduce speed degree, effect/influence molding cycle, reduce efficiency.

        3, parts in bubbles distribution

        (1) mold cavity in 积存空 gas generate 汽泡,常 distribution in and gate versus for upper.

        (2) plastics raw materials in separation understanding or chemical reaction generate bubbles 则沿塑 parts thick degree distribution.

        (3) plastics raw materials in water gas generate bubbles,则不规则 distribution in 整 塑 parts upper.