Plastic Molds Have Sufficient Surface Hardness And Wear Resistance

The hardness of plastic molds is usually below 50-60HRC. Heat treated molds should have sufficient surface hardness to ensure that the molds have sufficient stiffness. During the operation of the mold, due to the filling and flow of plastic, it needs to withstand significant compressive stress and friction. It is required that the mold maintain the accuracy of its shape and the stability of its dimensional accuracy, ensuring that the mold has sufficient service life. The wear resistance of the mold depends on the chemical composition and heat treatment hardness of the steel, so increasing the hardness of the mold is beneficial for improving its wear resistance.