1. The runner is as short as possible: to prevent the pouring system from condensing, it can also save the cost of steel and mold manufacturing, and improve the qualification rate of injection products.
2. Pressure balance: Make the resultant force of the injection mold during injection and the clamping force of the injection molding machine on the same straight line to avoid unbalanced flow leading to irregular molecular orientation and inconsistent shrinkage.
3. Temperature balance: Make the temperature of the injection mold cavity roughly equal to ensure that the shrinkage rate of each cavity plastic part is equal.
4. Balanced feeding: For a mold with multiple cavities in one mold, the same plastic part should be fed from the same position to ensure the interchangeability of the plastic parts; the size and length of the runner and gate should be adapted to the size of the plastic parts, as far as possible. It is ensured that each cavity is fed at the same time, and each cavity is evenly filled at the same time.
Reasonable design of injection mold molding parts to ensure the molding quality of plastic parts is the basic principle to improve the production efficiency of injection molds.
