During the blow molding process, it is necessary to increase the utilization rate of heat during mold forming, while during cooling during forming, it is necessary to rapidly decrease the temperature. Generally, water is used as the cooling medium, which has a low price and cost. The water source after cooling can be recycled. The low price and availability make it only suitable for use as a primary coolant. If you want to achieve cooling effect, you still need to use a cold mold, and the coolant is not necessarily the colder the better. Extreme cooling may have a counterproductive effect.
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