1. Enter the rubber mouth to open in the thick part of the product to ensure a smooth and complete filling.

2. Try to open it at the edge or bottom without affecting the appearance and function of the product.

3. Install a tie rod at the end of the cold material hole near the gate to facilitate demolding of the gate.

4, large or flat products, it is recommended to use multi-point casting to prevent product warpage and material shortage.

5, its position should be selected in the shortest part of the plastic filling process to reduce pressure loss, which is conducive to mold exhaust.

6. Avoid opening the gate near the slender core to avoid the flow directly hitting the core, causing deformation misalignment or bending.

7. The size of the gate is determined by product size, geometry, structure and type of plastic. You can take a small size first and then correct it according to the test mode.

8. Through the analysis or experience of the mold flow, it can be judged whether the product connection line caused by the gate position affects the appearance and function of the product, and can be solved by adding a cold material hole.

9. When the mold is porous, the same product adopts the symmetric casting method. When different products are molded in the same mold, the priority product will be placed near the mainstream.