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Polishing effect and method of injection mold cavity
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Polishing effect and method of injection mold cavity

Views: 4     Author: Site Editor     Publish Time: 2022-10-10      Origin: Site

Polishing effect and method of injection mold cavity

What is the effect of injection mold cavity polishing?

Injection mold cavity polishing mainly refers to the reliance on manual or mechanical polishing of the cavity surface, the surface is polished smooth. Because through milling processing, electric discharge machining, wire cutting machining to complete the injection molding mold cavity machining, its surface is still not up to the requirements of the die, so this time we need to finish polishing.

Injection mold cavity polishing abrasive choice?

1. Artificial abrasive, mainly used alumina (Al2O3), silicon carbide (SiC), boron carbide (BC), artificial diamond

2. Natural abrasive, silica (agate, Arkansas whetstone, etc.), corundum (emery, garnet), diamond powder

What problems will occur when the injection mold cavity polishing is not in place?

1. When molding products are demoulded from the cavity, the uneven surface may become inverted concave, which may lead to poor demoulding.

2 molding products transfer surface gloss will become dark, the surface of the product phase change.


What are the injection mold cavity polishing methods?

1. Mechanical polishing

Mechanical polishing is an injection mold polishing method by cutting, plastic deformation of the material surface to remove the convex part after polishing and get a smooth surface.

2. Chemical polishing

Chemical polishing is to let the material in the chemical medium surface of the microscopic convex part of the concave part of the priority to dissolve, so as to get the injection mold smooth surface.

3. Electrolytic polishing

The basic principle of electrolytic polishing is the same as chemical polishing, that is, the surface of the injection mold is smooth by selectively dissolving the small convex part of the material surface.

4. Ultrasonic polishing

Put the injection mold workpiece into the abrasive suspension and together in the ultrasonic field, depending on the oscillation of the ultrasonic wave, so that the abrasive grinding and polishing on the surface of the workpiece.

5. Fluid polishing

Fluid polishing relies on high-speed flowing liquid and the abrasive particles it carries to scour the surface of the injection mold workpiece to achieve the purpose of polishing.

6. Magnetic grinding and polishing

Magnetic grinding polishing is the use of magnetic abrasive under the action of the magnetic field to form an abrasive brush, grinding processing of the workpiece.


Polishing is a very important process in the process of plastic mold production. Polishing not only increases the appearance of the workpiece, but also improves the corrosion resistance and wear resistance of the material surface. It can also make plastic products easy to demoulding and reduce the production injection cycle.




Name: Iwan Fandra 丨Director
Tel: +86 198 2019 2009

E-mail: fandra77@vertical-china.com


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