1. The instability of the screw working speed of the injection molding machine is mainly affected by the following common factors:

1. Severe wear of transmission V belt, resulting in skidding during work.
2. The center of v-belt driving pulley is too small, so that v-belt transmission can not work properly with the trapezoidal inclined plane of the pulley.
3. The heating material in the cylinder is low, and the raw material plasticizing is not uniform, resulting in the increase of the load torque of the screw of the injection molding machine, which causes the screw rotation speed of the injection molding machine to be unstable.
4. The screw of the injection molding machine is damaged by thrust bearing.
2. Then, will the screw speed not be determined to affect the quality of plastic products?What are the implications?
1. Large size error of the geometrical shape of the products;
2. Products will often appear transverse wrinkles;
3. The surface of the product is rough, brittle or local.