In the era when the quality of this product is improved with the awareness of consumers, manufacturers are increasingly demanding plastic molds, and they are also selected for the selection of materials. What is a hard mold? The hard mold refers to the general term for the hardness of the front and rear molds of the plastic mold not exceeding 50 degrees. Generally in China, the products of hard mold plastic molds are mainly small products, the most common ones are thin wall molds, disposable knife and fork molds, nylon molds, wine box molds, etc.
The biggest characteristic of the hard mold in the plastic mold is the high hardness, the long life of the mold, and the life of the common plastic mold reaches more than 1 million times. This is very cost-effective for some products with relatively large output, and the profit of plastic parts can be improved by the output of plastic molds. The hard mold processing process is different from other plastic molds, and the processing hardness is considered, so the processing difficulty is very large. Therefore, its first process is roughing first, and the remaining amount of the product surface is a few millimeters. After roughing, heat treatment is used to bring the hardness of the plastic mold to more than 50 degrees, like vacuum quenching. Considering the deformation of the material after the heat treatment, we often need to cool the air after heat treatment for several days. Due to the high hardness of the mold, it is difficult to finish the finishing. The tool for CNC milling is relatively high, and the progress of the plastic processing die is relatively slow. Therefore, we generally prefer spark-discharge machining.
When manufacturing such a plastic mold hard mold, it was found that the hard mold had a certain scrap rate when heat treatment, and the risk of producing a hard mold was higher than that of a general plastic mold, and the cost was relatively large.