1. The rubber inlet should be opened in the thick part of the product to ensure smooth and complete mold filling;
2. Try to open it in a place that does not affect the appearance and function of the product, which can be at the edge or bottom;
3. In the cold material cavity near the gate, a pulling rod is often set at the end to facilitate the demolding of the sprue;
4. For large or flat products, it is recommended to use multi-point pouring, which can prevent product warping, deformation and material shortage;
5. Its position should be selected to make the plastic mold filling process short to reduce pressure loss and facilitate mold exhaust;
6. Avoid opening a gate near the slender core, so as to avoid the material flow directly impacting the core, resulting in deformation and dislocation or bending;
7. The gate size is determined by the product size, geometry, structure and plastic type, and the small size can be taken first and then corrected according to the mold trial condition;
8. Through mold flow analysis or experience, it can be judged whether the bonding line of the product due to the gate position affects the appearance and function of the product, and the cold material cavity can be added to solve it;
9. When one mold has multiple holes, the same product adopts symmetrical pouring method, and when different products are formed in the same mold, the product is preferentially placed close to the main road.
