Solve the factors that cause instability in the size of plastic parts:

1) The electrical and hydraulic systems of the injection machine are unstable;

2) Unstable feeding amount;

3) Uneven plastic particles and unstable shrinkage rate;

4) Changes in injection molding conditions (temperature, pressure, time) and inconsistent molding cycles;

5) The injection mold gate is too small, the size of the multi cavity feeding port is inconsistent, and the feeding is unbalanced;

6) Poor precision of injection molds, unstable movement of moving parts, and inaccurate positioning.