Solution to weld mark defects in injection molding

Injection molding is an industry with a wide range of knowledge and performance. In this industry, there are many problems that should be paid attention to by technicians, among which welding mark defects are also very common. How to solve this problem?
Professional technical personnel pointed out that there are many reasons for weld mark defects, including the pin hole and gate position on the mold, the use of too much mold release agent to make the first part of the molten material floating into the cavity, because the air is closed and other reasons, therefore, you can solve this problem through the following ways.
1. Increase the injection speed, increase the mold temperature, increase the temperature of the cylinder, and increase the injection pressure;
2. Add or modify vent;
3. Change the location, size and other mold structure of the gate.