After the mold is processed, the surface of the mold will be left with CNC machined knife marks or electric discharge fire patterns. At this time, the mold needs to be polished. Polishing can improve the finish of the injection molded product. The mirror spark machine can also do this. One point, but general manufacturers will have manual polishing, repeating the same seemingly simple action every day, in fact, there are a lot of specialties. Today, I will tell you why injection molds need to be polished by hand.

First of all, mold polishing has 2 purposes

  1. In order to increase the smoothness of the mold surface, make the produced products more beautiful.
  2. In order to better eject the mold and improve the efficiency to prevent the product from sticking to the mold, if the surface roughness of the mold is poor, it is very easy to stick to the mold. In order to make a better and more beautiful product and improve the production efficiency, it is necessary to do a good job of polishing which is very important.

The use of mirror spark machine for parts processing can achieve the effect of mirror surface. Both mirror spark machine and manual can increase the smoothness of the mold. The difference is that mirror spark machining is mainly used for precision machining of complex mold cavity surfaces, which can shorten the production cycle and the processing cost is also higher than the general spark machine. However, the manual polishing is used to complete some parts that cannot be completed by the mirror spark machine. The manual polishing parts have a high degree of smoothness, but the disadvantage is that it will take a bit long time.

Manual polishing is very strict in the early stage of processing. Every polishing technician must complete the operation carefully and carefully, and every processing procedure must be checked.