There will be some problems like insufficient filling, compressed air burning, high internal stress inside parts, flowing mark and welding line on surface when testing molds or production. To solve or avoid these problems, we will adjust the injection moulding process first, and also consider the mould gate. When it is no problem for the injection moulding process and gate, the main way to solve t...

The reason of air traps of a molding product: 1.Poor venting of the mold 2.The plastic raw material break down 3.Mold design is unreasonable(such as sprue is too small) 4.Injection speed is too fast How to improve air traps: 1.Improve the mold venting  2.Lower down the hopper temperature 3.Improve mold design (like enlarge the sprue) 4.Lower down the injection speed