There are two methods of forming stone grinding pads: hot pressing and cold pressing. Cold pressing is rarely used. The hot pressing method refers to heating the abrasive tool at the same time during the pressing process, so that the binder melts rapidly and is polycondensed and hardened or semi-hardened within the pressure holding time. The process is as follows: 1. Preparation of the steel core. The aluminum substrate has oil stains and impurities during processing. It must be cleaned with gasoline or xylene before use, and then epoxy resin or liquid phenolic resin is applied to the contact part between the substrate and the material to ensure the substrate and the abrasive tool. strong bond. 2. Abrasive assembly, Coat the contact part between the abrasive tool and the molding material with a release agent, such as molybdenum disulfide, zinc stearate, soap and other substances that can play a lubricating role to prevent the grinding wheel from being damaged by the mold wall, it is then mounted on the turntable together with the substrate.3. Press the non-diamond layer, drop the non-diamond layer material into the mold while the mold is rotating, scrape and compact, put on the pressing ring for cold pressing.4. The diamond layer is hot pressed, the diamond lamination ring is taken out and cleaned, the contact surface between the non-diamond layer and the diamond layer is roughened, coated with a layer of epoxy resin adhesive, the diamond layer abrasive tool is reassembled, and then the material is fed and scraped. , press ring and shim, placed on a hot press for hot pressing.5. After unloading the mold, after the hot pressing is completed, take the abrasive tool out of the hot press for rapid cooling, and remove the mold sleeve, mandrel, pressure ring, etc.
