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What are the causes of rusting plastic molds?
- Sep 19, 2018 -

(1) Gas generated by melt decomposition

Some materials produce volatile gases when heated. These gases are corrosive and cause corrosion to the mold. Therefore, when the equipment stops working, apply a soft cloth to clean the mold and close the mold. If it is not used for a long time, spray the rust inhibitor in the cavity, and then apply butter to the gate when closing the mold.

(2) Cooling water in the mold

Cooling water is often used in the mold for cooling, so there is more moisture around the molding equipment. If the mold is cooled below the dew point, the moisture in the air will form water droplets on the surface of the mold. If it is not wiped off in time, it will rust easily. Condensate is produced very quickly, especially after the mold has stopped working. Therefore, when the molding is stopped, the cooling water is also turned off and the mold is dried.

(3) Carbide produced during molding

After the mold is worked for a long time, the molding material precipitates and decomposes to form carbides, which often cause the mold to wear, corrode or rust. In this case, if any carbide formation is found, it should be removed immediately.