What are the common polishing methods for injection molds?


In the production process of injection molds, polishing […]

In the production process of injection molds, polishing is an important process in the production process. After all, with the increasing application of plastic products, people will also have higher and higher requirements for the appearance and quality of plastic products. Therefore, for our injection mold type The surface polishing quality of the cavity should also be improved accordingly, so let's take a look at several common polishing methods in injection molds!

1. Mechanical polishing
Mechanical polishing is a polishing method in which a smooth surface is obtained by cutting and plastic deformation of the surface of the material to remove the polished convex part. Generally, whetstone strips, wool wheels, sandpaper, etc. are used. It is mainly manual operation, which is a relatively busy process compared to other processes.

2. Chemical polishing
Chemical polishing is to dissolve the microscopically protruding part of the material in the chemical medium preferentially over the protruding part, thereby obtaining a smooth surface. The main advantage of this method is that it does not require complex equipment, can polish jobs with complex shapes, and can polish many jobs at the same time, with high efficiency.

3. Electrolytic polishing
The basic principle of electrolytic polishing is the same as that of chemical polishing, that is, by selectively dissolving tiny protrusions on the surface of the material, the surface is smooth. Compared with chemical polishing, the influence of cathode reaction can be eliminated, and the effect is better.

4. Ultrasonic polishing
The workpiece is placed in the abrasive suspension and placed in the ultrasonic field together, and the surface of the abrasive is ground and polished in the workpiece by the oscillation of the ultrasonic wave, and the macroscopic force of ultrasonic processing is small. It will not cause deformation of the workpiece, but it is difficult to make and follow the tooling. Ultrasonic machining can be combined with chemical or electrochemical chemical methods

5. Fluid polishing
Fluid polishing relies on the flowing liquid and the abrasive particles carried by it to scour the surface of the workpiece to achieve the purpose of polishing. Commonly used methods include abrasive jet processing, liquid jet processing, and hydrodynamic grinding.

6. Magnetic grinding and polishing
Magnetic grinding and polishing is the use of magnetic abrasives to form abrasive brushes under the action of a magnetic field to grind workpieces. This method has high processing efficiency, good quality, easy control of processing conditions and good working conditions.