(2) The injection speed is too fast. You should slow down properly.
(3) The exhaust of the mold is not smooth. Exhaust holes and slots should be added to improve the exhaust performance of the die.
(4) The shape and structure design of plastic parts are unreasonable and the wall thickness is too large. Appropriate adjustments should be made in case of possible changes.
(5) The section of gate and runner is too small. Should be appropriately increased.