Abstract

A method of manufacturing an abrasive member (10a, 10), in particular having the general shape of a disc such as a cutting or grinding disc, comprises -arranging a reinforcing insert or reinforcing member (24, 13) into a mold be- tween a layer of curable abrasive resin compound, in particular a layer of cur- able abrasive granulate, a backing member(16)such that at least a section of the reinforcing insert or reinforcing member(24, 13) is in direct physical con- tact with the curable abrasive resin compound,the reinforcing insertor rein- forcing member (24, 13) is at least partially covered by the backing mem- ber (16) and at least a section of the backing member(16) is in direct physical contact with the curable abrasive resin compound; -bonding the reinforcing insertor reinforcing member (24, 13) and the back- ing member(16) by curing the curable abrasive resin compound, wherein the cured abrasive resin compoundforms an abrasive layer(12) of the abrasive member(10).

IPC Classes  ?

• B24D 3/28 - Resins
• B24D 7/04 - Wheels in one piece with reinforcing means
• B24D 18/00 - Manufacture of grinding tools, e.g. wheels, not otherwise provided for

Abstract

A spark suppressor and spark- suppressing rotary abrasive tool having at least one non- smooth spark energy dissipating surface or layer disposed adjacent a spark generating region where there is abrasive contact between a workpiece and rotating abrasive implement of the tool. A preferred spark suppressor is a spark suppressing protective guard for the tool having a spark energy dissipating surface or layer within disposed adjacent to and facing toward the spark generating region. A preferred spark-suppressing rotary abrasive tool is equipped with such a spark-suppressing guard. A preferred spark energy dissipating surface is of three-dimensionally contoured construction having at least a plurality of upraised portions against which sparks generated contact dissipating their momentum and velocity until stopped and retained within the spark suppressor. A preferred spark energy dissipating layer is formed of a plurality of wires or pins that can be entangled to form a porous non-woven spark catching layer.

IPC Classes  ?

• B24B 55/05 - Protective covers for the grinding wheel specially designed for portable grinding machines