| 摘要 |
PURPOSE:To enhance the holding force of an abrasive and as well to enhance the durability of a grindstone, by using a special resin as a binder for the grindstone. CONSTITUTION:An abrasive is mixed with rudder type silicone oligomer (a kind of rudder type silicon resin) which is pulverized into 200 mesh size and is added with 2% of phenylephosphon acid as a hardening catalyst, and thereafter the thus obtained mixture is formed and secured on the pheriphery of a doughnut- like aluminum alloy 1 so that a grindstone layer 2 is formed. It is regarded that the grindstone layer 2 contains therein 10-80% by volume of the abrasive. With the use of this rudder type silicon resin having inorganic properties, as a binder, the adhesive force between the resin and the inorganic abrasive is enhanced to increase the holding force of the abrasive. Therefore, the coming-off of the abrasive is reduced so that the grinding rate of the abrasive may be greatly increased, and as well, the heat-resistance capability of the grindstone is enhanced. |
