A. There is no cold slug well in the gating system

If there is no cold slug well in the pouring system, the cold slug produced during pouring will enter the cavity and affect the quality of the molded plastic part. For this, a suitable cold slug well should be opened in the runner.

B. The capacity of the cold slug well is too small or the location is wrong

If the capacity of the cold slug well in the gating system is too small or the position is wrong, the cold material cannot be contained in the cold slug well and enters the cavity to form cold material. For this, the position of the cold slug well should be set correctly and make it have Suitable capacity.

C. Insufficient plasticizing ability of injection molding machine

If the plasticizing capacity of the injection molding machine is insufficient, the plasticizing capacity is small, and the plasticizing capacity is close to the quality of the plastic part, which makes the molding time shorter and produces cold material. For this, a larger injection molding machine should be used.

D. Unstable supply

If the feeding system of the injection molding machine is unstable and the feeding amount is insufficient, it is easy to produce cold material. For this, the feeding system should be carefully inspected to make it work normally.

E. Melt temperature is too low

If the melt temperature is too low, the melt will be poorly plasticized, resulting in cold material. For this, the melt temperature should be increased.

F. Mold temperature is too low

If the mold temperature is too low, the melt will easily produce more cold material when entering the mold. If these cold materials cannot be contained in the cold material well in time, they will enter the cavity and produce cold materials. For this, the mold temperature should be appropriately increased. .

G. Injection pressure is too low

If the injection pressure is too low, more cold material will be generated when the melt enters the cavity. For this, the injection pressure should be appropriately increased.