1. Good exhaust design
The gating system should be able to smoothly guide the filling of the melt into the various parts of the injection mold cavity and allow the gas in the cavity of the injection mold to be smoothly discharged.
2. Reduce the melt flow distance
Under the conditions of forming and exhausting, the melt should flow to the injection mold cavity and fill with the shortest distance, which can shorten the molding cycle, improve the quality of plastic products and reduce the consumption of raw materials.
3. To prevent core and insert deformation
When the melt quickly enters the cavity of the injection mold, it is necessary to avoid the melt directly impacting the core or the insert to prevent deformation of the core and the insert. For large or high-precision plastic parts, a multi-point gate feeding method can be used.
4. To prevent thickness and disparity
Due to the different injection molding process requirements, it is difficult to design two or more different geometries in the same injection mold. It is necessary to prevent the products with different wall thickness from being placed in the same injection mold.
5. Heat and pressure loss should be small
The gating system should be as short as possible to avoid pressure loss and temperature drop during injection molding.
6. The design of the gating system should facilitate the trimming of the gate and the removal of the gate aggregate.

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