Grinding wheel containing grain-coated reinforcement fibers and method of making it
First Claim
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1. A method of making a high-speed grinding disc having grinding grains and fibers of reinforcing material comprising:
- coating the fibers which have a length of more than 10 mm with a resin based binder and fine grain particles having diameters much smaller than that of the fibers and made of material which has substantially the same hardness as the material making up the grinding grain to form fibers with a binder and fine grain coating;
mixing the coated fibers with additional binder and the grinding grain to form a mixture; and
pressing the mixture to form the grinding discs wherein the coated fibers are protected from being damaged by compression against the grinding grain.
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Abstract
In a grinding disc reinforcement fibres of high strength are used and such fibres or normal glass fibres are covered with a protective coating including fine grain.
17 Citations
10 Claims
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1. A method of making a high-speed grinding disc having grinding grains and fibers of reinforcing material comprising:
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coating the fibers which have a length of more than 10 mm with a resin based binder and fine grain particles having diameters much smaller than that of the fibers and made of material which has substantially the same hardness as the material making up the grinding grain to form fibers with a binder and fine grain coating; mixing the coated fibers with additional binder and the grinding grain to form a mixture; and pressing the mixture to form the grinding discs wherein the coated fibers are protected from being damaged by compression against the grinding grain. - View Dependent Claims (2, 3, 6)
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4. A high speed grinding disc comprising:
- a synthetic resin matrix carrying abrasive grains and coated reinforced fibers, said coated reinforcement fibers having an outer coating of synthetic resin having embedded therein fine grain of a material having substantially the same hardness as said abrasive grain with a diameter substantially smaller than that of said fiber, said fine grain covering said fiber and protecting said fiber from damage from abrasive grain pressed against said fiber during the formation of said high-speed grinding disc.
- View Dependent Claims (5, 7, 8, 9, 10)
Specification