Injection mold material selection requirements

ABS \ PC \ AS \ PS etc. are china injection mold material selection objects, many users are very urgent injection mold reasonably want to know the selection criteria, the appropriate materials to create the ideal injection mold products.

Injection mold material selection criteria, as follows:

1. High corrosion resistance many resins and additives have a corrosive effect on the cavity surface, which makes the cavity surface corrosion of metal corrosion, peeling, surface conditions deteriorate, plastic parts quality deteriorates. Therefore, the best use of corrosion resistant steel, or cavity surface chrome, nickel cymbals.

2. When the gloss and precision injection mold plastic parts, good wear resistance and abrasion resistance of the surface of the mold cavity are directly related to the surface, especially in some plastics joined the fiberglass, mineral fillers and some paint, they Gao plastic melt together and flow velocity in the flow channel, the mold cavity, the cavity surface friction of the great, if the material does not wear, will soon wear, damage the quality of the plastic parts.

3. Good dimensional stability during the injection molding, injection mold cavity temperature should reach 300 ℃. For this reason, the best selection of properly tempered tool steel. Otherwise it will cause changes in the microstructure of the material, resulting in changes in the size of the plastic mold.

4. The ease of processing mold parts are mostly made of metal, and some very complex structure and shape, in order to shorten the production cycle, improve efficiency, ease of processing the material requirements of injection molds and precision drawing into the shape required.

5. Good polishing performance injection molded plastic parts are usually required to have good gloss and surface state, thus requiring cavity surface roughness is very small, so that the surface of the cavity surface must be processed, such as polishing, grinding. Therefore, the choice of steel should not contain coarse impurities and pores, etc.

6. Affected by heat treatment in order to extract a small Gao hardness and wear resistance, generally injection mold subjected to heat treatment, but this deal should make changes in small sizes. Thus, preferred to use a pre-hardened steel cutting.