What are the characteristics of precision mold manufacturing:
1. Wear resistance
When the blank is plasticized in the mold type chamber, the surface of the cavity is flowing and sliding along the surface of the cavity, causing a severe friction between the cavity surface to the blank, causing the mold to fail due to wear. So the abrasion resistance of the material is one of the most basic and important performance of the mold.
Hardness is the main factor affecting wear resistance. Under normal circumstances, the higher the hardness of the mold parts, the smaller the amount of wear, the better the wear resistance. In addition, wear resistance is also related to the type, quantity, morphology, size, and distribution of carbides in the material.
Most of the working conditions of the mold is very bad, and some often withstand a large impact load, resulting in brittle breakage. In order to prevent the mold parts from suddenly crisp while working, the mold should have high strength and toughness.
The toughness of the mold mainly depends on the amount of carbon content, grain size and tissue state – precision mold manufacturing.
3. Fatigue break performance
During the mold working process, under the long-term effect of cyclic stress, fatigue is often caused. The form has a small energy multiple impact fatigue and fault, tensile fatigue fracture contact fatigue breaks and bending fatigue breaks.
The fatigue fracture properties of the mold mainly depend on their strength, toughness, hardness, and the content of the inclusions in the material.
4. High temperature performance
When the operating temperature of the mold is higher, the hardness and strength will fall, resulting in early wear of the mold or has failed to produce plastic deformation. Therefore, the mold material should have a higher anti-back fire stability to ensure that the mold is high hardness and strength at the operating temperature.
5. Heat-resistant fatigue properties – precision mold manufacturing
Some molds are in a state in which the surface is repeated and cooled during operation, so that the surface of the cavity is pulled, the pressure becomes, causing surface cracking and peeling, increasing friction, hindering plastic deformation, reducing dimensional accuracy, resulting in The mold fails. Cold and cold fatigue is one of the main forms of thermal work mold failure, helping this type of mold should have a high cold and hot fatigue performance.
6. Corrosion resistance
Some molds such as plastic molds are in operation, due to elements such as chlorine, fluorine in plastics, decompose HCI, HF and other strong erosive gases, erod the surface roughness, and increase the surface roughness of the mold, and increase the surface roughness.