Material selection requirements for precision plastic mould processing
In the process of plastic mold manufacturing, the selection of materials is very critical. On the one hand, the requirements of actual working conditions should be met; on the other hand, the requirements of process performance should be met. Of course, the requirements of economy should not be ignored.
When the blank is plastic deformed in the mold cavity, it flows and slides along the surface of the mold cavity, causing severe friction between the mold surface and the blank, which leads to the failure of the precision plastic mold due to wear.Therefore, one of the basic properties of precision plastic mold material is wear resistance.
As the working conditions of precision plastic moulds are mostly very harsh, some of them often bear large impact loads, resulting in brittle fracture.Therefore, in order to make mold parts suddenly brittle when working, precision plastic mold processing materials should have high strength and toughness.
In the working process of precision plastic mould, fatigue fracture is often caused by long-term cyclic stress.However, this problem will be greatly improved if the fatigue and fracture properties of the processed materials are relatively good.In addition, high temperature, cold and heat fatigue and corrosion resistance are also included in the actual working conditions.
In terms of process performance, precision plastic mould processing materials need to meet the requirements of forgeability, annealing process, machinability, oxidation, decarbonization sensitivity, hardenability, hardenability, quenching deformation cracking tendency and grindability.
The principle of economy must be taken into account when selecting materials for precision plastic moulds to reduce manufacturing cost as much as possible.Accordingly, below the premise that satisfies use property, choose low price above all, can use carbon steel need not alloy steel, can use domestic material need not import material