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The hardness of plastic molds is usually below 50-60HRC

source: Time:2019-03-21 10:49:22

The hardness of the plastic mold is usually below 50-60HRC, and the heat-treated mold should have sufficient surface hardness to ensure sufficient rigidity of the mold. In the work, the mold is subjected to large compressive stress and friction due to the filling and flowing of the plastic. The mold is required to maintain the accuracy of the shape and the stability of the dimensional accuracy to ensure the mold has a sufficient service life. The wear resistance of the mold depends on the chemical composition of the steel and the heat treatment hardness, so increasing the hardness of the mold is beneficial to improve its wear resistance.