As the most critical part of the plastic mold casting system, the type and layout of the gate play an important role in the molding of the finished product, and will also affect the overall quality of the product. In most cases, the gate is the smallest part in the entire casting system, except for the direct gate of the main runner type. So, what should be paid attention to in the layout of the gate?

The weld marks formed by the two-hole parts on the part will be connected in a line, thereby reducing the strength of the part. Therefore, the weld marks should be controlled in a relatively hidden and less stressed position. In order to increase the stability of the dissolution, a cold slug can be opened on the outside of the weld mark. For larger frame-shaped parts, auxiliary runners can be added, or the number of gates can be increased to shorten the flow of the molten material.

Plastic mold Plastic shell

It is necessary to prevent the core from deforming under the impact of unilateral injection pressure, which will act on the part to bend the part and form obvious surface defects. Placing the gate on the notch can prevent interference with other related parts during assembly, which is conducive to automatic production during injection molding.

When the melt enters the cavity from the runner through the small interface gate, the speed will increase. If there is no resistance in the cavity to reduce the speed of the melt, the spray phenomenon will occur, resulting in severe serpentine on the surface of the part. Therefore, it is necessary to select a suitable gate form to reduce the flow rate of the melt and ensure that the melt can be evenly filled into each cavity.

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