A mold is composed of many parts. The quality of the parts directly affects the quality of the mold, and the final quality of the parts is guaranteed by the finishing. Therefore, it is important to control the finishing. The processing of mold parts can be roughly divided into three categories according to the appearance and shape of the parts: plates, special-shaped parts and shafts. The...

The tool marks and wear marks left on the surface of the part are the place where the stress is concentrated and the source of the crack propagation. Therefore, after the processing is completed, the surface of the part needs to be strengthened and polished by a fitter to deal with hidden processing hazards. Some edges, acute angles, and orifices of the workpiece are dulled and rounded....

There are three main types of machine tools used in grinding: surface grinders, internal and external cylindrical grinders, and tool abrasives. During finishing grinding, grinding deformation and grinding cracks must be strictly controlled. Even very small cracks will be exposed in the subsequent processing and use. Therefore, the feed of the fine grinding should be small, not large, the...

Modern mold factories cannot lack electric machining. Electric machining can process all kinds of special-shaped and high-hardness parts. It is divided into two types: wire cutting and electric spark. The machining accuracy of slow-moving wire cutting can reach ±0.003mm, and the roughness is Ra0.2μm. When the processing starts, check the condition of the machine tool, check the...

Polypropylene (PP) Specific gravity: 0.9-0.91 g / cm3 Molding shrinkage: 1.0-2.5% Molding temperature: 160-220 ° C Drying conditions: Material performance: Low density, strength stiffness, hardness and heat resistance are better than low-pressure polyethylene, can be used at about 100 degrees. It has good electrical properties and high-frequency insulation is not affected by humidity, but...