Shanghai Daoqin Plastics Co., Ltd.

injection molding processing in has metal parts is is improve/increase plastics products as strong/high degree and increase products use function （如 improvement conductive property or and its it parts and other ）. due to metal parts and plastics thermal properties and shrinkage rate very large, therefore, injection molding mold in material in metal parts temperature degree reduce non fast, make this plastics generate force in phenomenon, heavy also 会出现 cracks, make parts 连接牢 solid property reduce. is adjustment metal parts temperature degree and plastics injection temperature degree 趋于接近, shrink small parts 镶嵌时 temperature 差, parts in and material molding front must add hot rise temperature 处理, add hot temperature degree generally in 110℃ above. for/regarding relatively small metal parts, injection material temperature degree very fast will its add hot, generally need preheating 处理.