During the blow molding process, it is necessary to increase the utilization rate of heat during the mold forming process, while during the forming cooling process, it is necessary to quickly 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. Due to its low price and recyclability, it can only be used 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. The extreme will backfire, and undercooling may have a counterproductive effect
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