Shanghai Daoqin Plastics Co., Ltd.

一． injection molding parts processing 时 generate 熔接痕 causes:

1, due to melt material 先头部 separation cooling solid in combined 流时造 formed strip/profile 状 熔接痕.

2, due to gas has material formed separation by 封闭.

3, type inner has demolding agent.

二． experience Knowledge:

1, use gate, has make material from 2 direction combined products generally has 熔接痕, remove outer, if 想避免熔接痕 can gate make 熔接痕发生 in 不显眼 or 看起 顺眼 位置.

2, mold upper 销（ for products upper 孔） generally 会发生熔接痕.

3, gas by 封闭而 generate 熔接痕 phenomenon non more, therefore must make gas full 逸出.

4, has use this type of methods: make generate 熔接痕 方发生 in products more thin sheet/slice upper, rear again thin sheet/slice 切断.

5, demolding agent more make melt material 先头部 separation 浮起送进 type 腔, 肯定就会发生熔接痕.

三． solution methods:

1, methods: improve/increase injection shot speed degree, improve/increase mold temperature degree, improve/increase material temperature degree, improve/increase injection shot pressure.

2, short methods: increase or 修改排 gas 槽.

3, long methods: gate 位置, dimensions and other mold structure.