What Is The Role Of The Plastic Mold Gate

The gate of the plastic mold is the channel connecting the main runner (or branch runner) and the cavity. The cross-sectional area of the channel can be equal to the main flow channel (or branch channel), but it is usually reduced. So it is the part with the smallest cross-sectional area in the entire runner system. The shape and size of the gate have a great influence on the quality of the product.

1. Control the material flow speed;

2. It can prevent backflow due to the premature solidification of the melt stored in this part during injection;

3. The passing melt is subjected to strong shear to increase the temperature, thereby reducing the apparent viscosity and improving the fluidity;

4. It is convenient to separate the product and the runner system. The design of the gate shape, size and position depends on the nature of the plastic, the size and structure of the product.