How to maintain the injection mold?
As we all know that the quality and dimensional accuracy of injection molds have a direct impact on the quality control and dimension accuracy of injection products. After a long-term injection molding process, we will see some scratches or indentation on the surface and these indentations will directly affect the quality and appearance of the injection products. Therefore, if there are some quality problems or indentation on the injection mold, we need to do maintenance for the injection mold in time.
Some methods of injection mold maintenance.
1. Replacing
Generally, this method is mainly used for spare parts of injection molds. We can replace the broken parts directly to achieve maintenance.
2. Electroplating
For the injection molds with an abrasion on the cavity and parting surface, we can adopt an electroplating method to plating a hard chrome layer on the worn part, and then grinding and polishing the surface to make the cavity remains the same.
3. Surfacing
For the injection molds with defects like pits, indentation, we can use low-temperature argon arc welding to fill the pits and indentations, and then perform grinding and polishing to make the surface unchanged.
4. Reaming
For some parts with enlarged aperture, we can expand the hole without affecting the strength of the injection mold, and then change the related guide pin to ensure the new pin matches the hole well.
5. Milling
For partially damaged molds, we can mill the damaged parts by a milling machine, and then put the same material metal plate in the same place and reprocess it into the required mold shape.
Some examples of injection mold maintenance
1. If the parting surface of the injection mold was damaged, it will be easy to cause a flash problem in the injection process. At this time, it is necessary to repair the surface to ensure the right mold dimensions. Normally, we need to grind the worn part and restore the parting surface of the injection mold to the original thickness by chrome plating.
2. In the case of rust on the injection mold cavity, first, it is necessary to apply a layer of anti-rust oil on the surface of the cavity after processing to avoid direct air contact with the surface of the mold cavity. The rust layer can be removed by polishing, and combined with electroplating, to ensure the overall thickness of the injection mold remains unchanged, and the smoothness of the cavity remains unchanged.
