Method of Manufacturing an Abrasive Member, in particular Rotary Abrasive Disc, and Abrasive Member, in particular Rotary Abrasive Disc

Abstract

A method of manufacturing an abrasive member, in particular having the general shape of a disc such as a cutting or grinding disc, comprisesarranging a reinforcing insert or reinforcing member into a mold between a layer of curable abrasive resin compound, in particular a layer of curable abrasive granulate, a backing member such that at least a section of the reinforcing insert or reinforcing member is in direct physical contact with the curable abrasive resin compound, the reinforcing insert or reinforcing member is at least partially covered by the backing member and at least a section of the backing member is in direct physical contact with the curable abrasive resin compound;bonding the reinforcing insert or reinforcing member and the backing member by curing the curable abrasive resin compound, wherein the cured abrasive resin compound forms an abrasive layer of the abrasive member.

1 - 18 . (canceled) 
     
     
         19 . An abrasive member formed of a plurality of layers comprising:
 (a) an annular backing member;   (b) an annular abrasive layer comprised of an abrasive resin and abrasive granulate; and   (c) an annular reinforcing member disposed between the annular backing member and the abrasive layer; and   wherein (i) at least a portion of the annular reinforcing member is in direct physical contact with the abrasive layer, (ii) the annular reinforcing member is at least partially covered by the annular backing member; and (iii) at least a portion of the annular backing member is in direct physical contact with the abrasive layer; and   wherein the annular reinforcing member has (i) an exposed annular section extending radially into the central opening of the abrasive member, (ii) an embedded annular section located radially outwardly of the exposed annular section, the embedded annular section disposed between the abrasive layer and backing member, and (iii) wherein the radial extent of the embedded annular section is greater than the radial extent of the exposed annular section.   
     
     
         20 . The abrasive member according to  claim 19 , wherein the annular reinforcing member is positioned to surround a center of mass of the abrasive member. 
     
     
         21 . An abrasive grinding or cutting disc having a central opening and a laminate construction, the abrasive grinding or cutting disc comprising:
 an annular abrasive layer consisting of a curable abrasive resin compound;   an annular reinforcing member having an inner peripheral edge defining the central opening and an outer peripheral edge that is partially embedded in a surface of the annular abrasive layer so as to bond the annular reinforcing member to the annular abrasive layer;   an annular backing member immovably fixed to the annular reinforcing member and bonded to portions of the annular abrasive layer; and   wherein the laminate construction is a coplanar, multi-layer arrangement that varies from an inner facing of the central opening radially outward to an outer peripheral edge of the abrasive grinding or cutting disc, with layers comprising the annular abrasive layer, the annular reinforcing member, and/or the annular backing member, and wherein the annular reinforcing member is included in the laminate construction at the inner facing but is excluded from the laminate construction at the outer peripheral edge.   
     
     
         22 . The abrasive grinding or cutting disc of  claim 21  further comprising an annular label affixed over one or both flat outer surfaces of the abrasive grinding or cutting disc. 
     
     
         23 . The abrasive grinding or cutting disc of  claim 21  further comprising a second backing member positioned on an opposing side of the annular abrasive layer, said second backing member having an identical shape in comparison to the annular backing member. 
     
     
         24 . The abrasive grinding or cutting disc of  claim 21  wherein the annular reinforcing member is positioned around a midpoint of the laminate construction. 
     
     
         25 . The abrasive grinding or cutting disc of  claim 21  wherein the annular reinforcing ring includes a flange extending radially inward into the central opening, said flange being excluded from the laminate construction defined along the inner facing of the central opening. 
     
     
         26 . The abrasive grinding or cutting disc of  claim 25  wherein the flange includes an axially extending circumferential projection. 
     
     
         27 . The abrasive grinding or cutting disc of  claim 21  wherein the annular reinforcing member consists of a metal ring positioned coaxially within the central opening. 
     
     
         28 . The abrasive grinding or cutting disc of  claim 21  wherein the annular reinforcing member has at least one axially extending protrusion penetrating into a surface of the annular abrasive layer, said protrusions mechanically bonding with the curable abrasive resin compound. 
     
     
         29 . The abrasive grinding or cutting disc of  claim 21  wherein the curable abrasive resin compound includes phenolic resins and/or polyamide. 
     
     
         30 . The abrasive grinding or cutting disc of  claim 21  wherein the annular backing member comprises a fiber fabric impregnated with resin. 
     
     
         31 . The abrasive grinding or cutting disc of  claim 30  wherein the fiber fabric is a glass fiber fabric and the resin is a phenolic resin.