A process for the manufacture of a resin-bound abrasive grinder having superior strength, grinding performance and wear resistance, which comprises heating a synthetic resin or dissolving it in a suitable solvent to liquidize it, adding at least one inorganic filler to the liquidized resin to thoroughly wet the filler therewith and bind same together thereby forming a binding composition, incorporating the binding composition with an abrasive material and then pressure forming the resultant mixture to manufacture the resin-bound abrasive grinder.
An abrasive composition prepared by kneading abrasive grains and a binder together, with addition of a filler when desired, is molded into a block, which is heated by a high-frequency wave heater and then passed between multiple pairs of rolls and thereby rolled into a sheet. Circular pieces are blanked out from the rolled sheet and subsequently baked to continuously produce resinoid wheels.
This invention concerns the discovery that sol-gel process alumina abrasive grain provides superior performance in bonded abrasives for grinding cast iron. In a preferred form it is disclosed that bonded abrasives of sol-gel process alumina abrasives in combination with other abrasive grains such as those of silicon carbide and fused alumina also provide superior grinding of cast iron.
A polishing tool for polishing optical and technical glass, semiconductors, ceramics and other materials has a high concentration of cerium dioxide or aluminum oxide particles in the quantity of 85-96% by weight, and a high molecular binder based on synthetic rubber and including a combination of high-molecular components and other components for vulcanization, plasticization and stabilization.
A process is described for manufacturing resin bonded grinding articles such as grinding wheels and segments. The process comprises preparing a mixture of abrasive grain particles, particulate spacer material and a curable liquid resin, filling a mold with the mixture and curing the mixture to a solid article in the absence of external pressure. Grinding articles prepared in this manner and containing high concentrations of abrasive grain particles exhibit superior grinding wheel performance in rate of stock removal with no metallurgical damage to the steel being worked upon while maintaining precision of cut.
