Shanghai Daoqin Plastics Co., Ltd.

injection molding mold gas is mold design in 一 不 can overlook issues.排 gas defect,会造 formed more issues. ratio 如: gas 孔, 空洞, 烧焦, bubbles, surface 银纹, weld lines obvious and other.

mold inner gas main/primary has below/following several 源:
1.进 material system and type in has gas.
2. plastics has water separation in high temperature lower 蒸发而生 formed water gas.
3. plastics separation understanding generate gas 体.
4. plastics in certain additives or chemical 反映 生 formed gas 体
5.进 material in 夹杂 空 gas and water gas!

basic design key points can nano lower:
1.排 gas need ensure speed, full, gas speed degree need and speed degree versus 适应;
2.排 gas amount in parts relatively thick molding 部位;
3.排 gas 槽应尽 amount in separation type upper;
4.排 gas 槽应尽 amount in material 流 终点 and combined 处, cold material 井 尽端;
5. is mold manufacturing and 清模方便, gas 槽应尽 amount in 凹模一侧;
6.排 gas direction 不应朝 toward as 面, anti injection molding material 伤人;
7.排 gas 槽不应 has *角, anti 止积存 cold material;
8.排 gas large small dimensions need combined 适（ generally thick degree in 0.2－0.3mm left right ）, according to specific material and product requirements selection processing,尽 amount 避免造 formed flash.

Common gas has:
1.排 gas or gas 　　　　　　　
2. separation type gas 　　　　　　　　　
3.拼镶 parts 缝隙排 gas
4.推杆 or 顶针间隙排 gas 　　　　　
5. powder 末烧结 alloy block gas 　　　　　
6.设置排 gas strong/high made gas
7. application true gas machine, to 主动排 gas, full gas 效果.