How to select the right information of mold accessories is the key to the smooth consumption of mold
1. Good machinability. The steel grade which is easy to cut and can get high precision parts after machining should be selected.
2. Excellent polishing performance. The working surface of injection molding parts needs polishing to reach the mirror surface, RA ≤ 0.05 μ m。 The hardness of steel should be HRC35-40. A good appearance makes polishing difficult. The microstructure of the steel should be uniform and compact, with few impurities and no defects and pinpricks.
3. Good wear resistance and fatigue resistance. The injection mold cavity is not only scoured by high pressure plastic melt, but also subjected to alternating stress of cold and hot temperature. Ordinary high carbon alloy steel can obtain high hardness after heat treatment, but its toughness is poor and easy to form external cracks. The selected steel grade should be able to reduce the polishing times of the injection mold, adhere to the dimensional accuracy of the cavity for a long time, and reach the service life of mass consumption.
4. It has corrosion resistance. For some kinds of plastics, such as PVC and flame retardant plastics, it is necessary to consider the selection of steel with corrosion resistance