Plastic Industry Parts Mould's Plastic Injection Molding: Cooling Rate Process Explained

Plastic Industry Parts Mould's Plastic Injection Molding: Cooling Rate Process Explained

Cooling Rate Process and Its Effect on Final Formed Parts

In plastic injection molding, the cooling rate is the last segment of the molding cycle.

The cooling rate is the rate of deceleration from the time the plastic resin enters the mold until the last cavity of the mold is filled.

When the temperature can no longer drop, the cooling process is complete and any additional time spent cooling the part is useless.

After the cooling process is complete, the part can be safely removed from the mold.

cavity pressure

The cooling rate is monitored, measured, and displayed on the pressure curve. It is shown this way because the plastic resin contracts as it cools, reducing

cavity pressure.

mold temperature

In plastic injection molding, the temperature of the mold itself can be a factor in the cooling rate process. In addition to affecting mold cooling lines, mold temperature can also affect part defects such as:

mold warping

sink marks

injection

Improper mold temperature can also affect performance, for example:

The cooling process is complete when the temperature can no longer decrease and any additional time spent cooling the part is useless.

After the cooling process is complete, the part can be safely removed from the mold.