Preform problem Two：Sinter

Possible cause
1. The temperature of the main channel and the runner of the mold is too high; 2. The temperature of the sol cylinder is too high;
3. The hot runner has dead ends
4. The melt glue is loosened for too long.
Solution
1. Properly reduce the temperature of the main channel and the branch channel; 2. Properly lower the temperature of the sol cylinder;
3. Repair the hot runner
4. Properly adjust the loosening.