The design of the gate is related to factors such as the size, shape, mold structure, injection process conditions, and performance of the plastic part. But in terms of basic functions, the gate section should be small and the length should be short, because only in this way can it meet the requirements of increasing the flow rate, fast cooling and sealing, facilitating the separation of plastic parts, and minimizing gate residue. The plastic mold processing manufacturer summarizes the key points of gate design as follows:

1) The selection of gate position should make the plastic filling process shortest to reduce pressure loss;

2) The selection of gate position should be conducive to eliminating air in the mold cavity;

3) The gate should be placed as close as possible to the bottom of the edge without affecting the appearance of the plastic part;

4) The size of the gate depends on the size, shape, and properties of the plastic part;

5) The gate is located in the thicker section of the plastic part, allowing the molten material to flow from the thick section into the thin section to ensure complete mold filling;

6) When forming large or flat plastic parts, compound gates can be used for plastic mold processing to prevent warping, deformation, and material shortage;

7) When designing multiple cavity injection molds, consider the balance of the sprue in conjunction with the balance of the runner, and strive to achieve uniform filling of the molten material at the same time;