How to choose plastic mold with good performance?

　　Plastic mold process is in the long-term effects of cyclic stress, often resulting in fatigue fracture. In the form of a small energy repeated impact fatigue fracture, the tensile fatigue fracture contact fatigue fracture and flexural fatigue fracture.

　　Therefore, the mold material has a high temper resistance, to ensure that the mold in the operating temperature, high hardness and strength.

　　Some plastic mold in the course of their work in the state of the repeated heating and cooling, so that the cavity surface tension, pressure to change the role of stress, causing surface cracking and spalling, increased friction and hinder plastic deformation, reducing the dimensional accuracy, which resulting in die failure.

　　Thermal fatigue is one of the main forms of hot work die failure to help this type of mold should have a high resistance to thermal fatigue performance.