Shenzhen WT Hardware and Plastics
Tel: +86-755-27673590, 23143539
Add: 5B2, Jiangshi Building, Fuyong, Shenzhen, China
Our main products: Injection Mold, Molding Parts, Die Casting Mold, CNC machining of high quality
Working condition requirement for mold
When the blank is moulded in the mold cavity, the surface of the cavity flows and slides along the surface of the cavity, causing a sharp friction between the cavity surface and the billet, resulting in the failure of the mold due to wear. Therefore, the wear-resisting of the material is one of the most basic and important energy of the mould.
Hardness is the main factor that affects wear-resisting. Generally, the hardness of the mold parts is higher, the wear quantity is smaller, wear-resisting is better. In addition, wear-resisting is also related to the type, quantity, shape, size and distribution of carbide in the material.
The working conditions of the die are very poor, some of them often bear a large impact load, which leads to brittle fracture. In order to prevent the sudden break of the mold parts in the work, the mold should have high degree and toughness.
The toughness of the mould depends on the carbon content, grain size and state of the material.
3. Fatigue fracture energy
In the process of mould working, the fatigue fracture is often caused by the long-term effect of cyclic stress. Its form has small energy multiple impact fatigue fracture, tensile fatigue fracture contact fatigue fracture and bending fatigue fracture.
4. High temperature energy
When the working temperature of the mold is higher, the hardness and degree of the die will be reduced, resulting in the early wear of the mold or the production of plastic deformation. Therefore, the mould material should have high anti-tempering stability to ensure that the mould has a high hardness and degree in working temperature.
5. Thermal fatigue resistance
Some mold in the process of work is in a state of repeated heating and cooling, the cavity surface tension, pressure and stress effect, cause surface cracking and spalling, increase the friction, obstacles to plastic deformation, reduces the dimension precision, resulting in the mould failure. Cold and heat fatigue is one of the main forms of thermal die failure.
6, corrosion resistant
Some mould such as plastic die on the job, as a result of the elements such as chlorine, fluorine plastics, thermal decomposition after precipitation erosion gas such as HCI, HF, erosion surface of mould cavity, increasing its surface roughness, aggravate the wear failure.