what are the requirements for injection molds?

The working conditions of Plastic lnjection Moulding are as follows:1.wear resistance
When the blank is plastically deformed in the cavity of the injection mold, it both flows and slides along the surface of thecavity, causing severe friction between the surface of the cavity and the blank, resulting in the failure of the injection mold dueto wear. Therefore, the wear resistance of the material is one of the basic and important properties of the injection mold
Hardness is the main factor affecting wear resistance. In general, the higher the hardness of the injection mold parts,the
smaller the amount of wear and the better the wear resistance. In addition, wear resistance is also related to the type, quantity,shape, size and distribution of carbides in the material.
2.Heat and cold fatigue resistance
Some China Plastic Injection Moulding suppliers are in a state of repeated heating and cooling during the working
process,which causes the surface of the cavity to be subjected to tension, pressure and stress,causing surface cracking andpeeling, increasing friction, hindering plastic deformation, and reducing size.accuracy.resulting in injection mold failure.Hotand cold fatigue is one of the main forms of failure of hot work injection molds. This type of injection mold should have highresistance to cold and heat fatigue.
3.corrosion resistance
When some injection molds such as plastic molds are working. due to the presence of chlorine,fluorine and other elements inthe plastic,strong corrosive gases such as HCl and HF are decomposed after heating, which erodes the surface of the injectionmold cavity, increases its surface roughness, and aggravates wear. invalid.
4.Strong toughness
Most of the working conditions of injection molds are very harsh, and some often suffer from large impact loads,resulting inbrittle fracture. In order to prevent the sudden brittleness of the injection mold parts during operation,the injection mold musthave high strength and toughness. The toughness of the injection mold mainly depends on the carbon content grain size andorganizational state of the material.
5.Fatigue fracture performance
During the working process of the injection mold, fatigue fracture is often caused under the long-term action of cyclic stress. Itsforms include small-energy multiple impact fatigue fracture, tensile fatigue fracture, contact fatigue fracture and bending
fatigue fracture.The fatigue fracture performance of an injection mold mainly depends on its strength,toughness, hardness,and the content of inclusions in the material.
6.High temperature performance
when the working temperature of the injection mold is high,the hardness and strength will decrease, resulting in earlyt wear ofthe injection mold or plastic deformation and failure. Therefore, the injection mold material should have high anti-temperingstability to ensure that the injection mold has high hardness and strength at working temperature.