Die polishing is a common surface treatment method, its main purpose is to make the die surface smooth, flat, improve the surface gloss and texture. Polishing usually involves the following steps: 1. Rough polishing: Use grinding tools (such as grinding wheel, sandpaper, etc.) to rough the surface of the mold to remove the roughness and roughness of the surface. 2. Medium polishing: The use of finer grinding tools, the surface of the mold for medium particle polishing, further smooth the surface, and eliminate the traces left in the process of rough polishing. 3. Fine polishing: Use fine sandpaper or polishing cloth and other tools to finely polish the surface of the mold to make its surface smooth like a mirror and achieve the required finish. 4. Polishing agent treatment: In the polishing process, polishing agent or polishing liquid is usually used to improve the polishing effect and prevent the mold surface from scratch or oxidation again. 5. Cleaning and drying: After finishing polishing, clean the mold, remove polish and surface impurities, and dry to ensure that the mold surface is clean and dust-free. Through the above steps, the surface of the mold can reach a certain level of finish and quality requirements, improve its appearance quality and performance.