Disc for Abrading Flat Surfaces and Curved Surfaces

Abstract

The present invention relates to a disc for abrading which is fitted to an electrically driven tool and is able to freely abrade flat surfaces and curved surfaces. And provided is a disc for abrading flat surfaces and curved surfaces, wherein the disc comprises: a holder of a plastic material, which rotates following the coupling of the electrically driven tool into a coupling hole formed in the centre thereof; a disc-shaped abrasive-fabric assembly formed by stacking layers of a plurality of abrasive-fabric pieces circumferentially along the edge of the holder; a resin layer for integrally linking the holder and the abrasive-fabric assembly; and a circular curving part which is formed between the edge of the holder and the edge of the abrasive-fabric assembly, and wherein the curving part can flex along the surface of a material to be abraded, so as to freely abrade a flat surface or curved surface of the material to be abraded.

1 . A disc which is mounted on an electrically driven tool and abrades a surface of a material to be abraded, the disc comprising:
 a plastic-made holder which has a coupling hole formed in a central portion thereof and rotates by coupling an electrically driven tool to the coupling hole;   a disc-shaped abrasive-fabric assembly formed by circumferentially overlapping and stacking a plurality of abrasive-fabric pieces along an edge of the holder;   a resin layer which integrally links the holder and the abrasive-fabric assembly; and   a circular curving part formed between an edge of the holder and an edge of the abrasive-fabric assembly,
 wherein the curving part flexes along the surface of the material to be abraded and freely abrades a flat surface or curved surface of the material to be abraded. 
   
     
     
         2 . The disc of abrading the flat or curved surface as set forth in  claim 1 , wherein the diameter of the holder is ⅓ to ⅔ of the outer diameter of the abrasive-fabric assembly, and wherein the curving part forms an available abrasive surface having a size from the outside of the edge of the holder to ⅓ to ⅔ of the outer diameter of the abrasive-fabric assembly. 
     
     
         3 . The disc of abrading the flat or curved surface as set forth in  claim 1 , wherein a concave groove is formed on one side of the circumference of the coupling hole of the holder, wherein a catching stepped portion is formed on an outer edge of the concave groove, and wherein a ring groove is formed concave on an inner edge opposite to the catching stepped portion, so that a mounting space in which the resin layer fixes an inner edge of the abrasive-fabric assembly to the holder is formed to extend. 
     
     
         4 . The disc of abrading the flat or curved surface as set forth in  claim 3 , wherein the resin layer extends from the mounting space of the holder to the edge of the holder and the mid-point of the edge of the abrasive-fabric assembly, and elastically supports a back side of the curving part.