In the injection molding process, each part of the mold is the same. They have to fit tightly together. If the mold specification is not too good (such as axial force and shaped), it will damage the dimensional accuracy. After injection, the internal structure of the mold should have good air circulation and good cooling practical effect. If there are many tiny gaps or protrusions in the internal structure of the mold, they should be repaired immediately to prevent dry cracks or deformation.

In some riser plastic machine operation, there may be some sudden injection situation, for example:1. head mold injection so full, is doing a few mold is not satisfied. In the future to play many empty mold on the line, continue to do similar problems.2. If you do a good job in the morning, the afternoon meal home will increase the pressure of work. If you do a period of time, you need to release the pressure. Give a kind of vertical rod injection molding machine injection molding work pressure, resulting in injection molding instability. So how to solve the vertical rod plastic machine injection molding instability?
First, you need to analyze the cause of such problems: in fact, if you stay in front for a long time, you can't shoot them out. At work, due to time difficulties, many empty mold plastic pellets dissolve again, so the injection is normal.