Composite pads for buffing and polishing painted vehicle body surfaces and other applications
View Patent ↗A composite pad includes an outer pad portion having a surface with a firmness, stiffness or abrasiveness, and an inner pad portion disposed on or in the outer pad portion, the inner pad portion having a surface with a firmness, stiffness or abrasiveness which is greater than that of the outer pad surface. The backside of the composite pad preferably includes a hook-and-loop or other mechanism for attachment to a tool such as an orbital polisher. The inner portion may used to remove larger scratches left from sand paper (or other abrasives) then, without removing the pad, the polisher tool may be tilted relative to the surface enabling the outer portion to buff the area and remove any swirl marks. The surface of the inner pad may be raised relative to the surface of the outer pad, flush or recessed. In the preferred embodiments the various pad portions are made of foam material such as polyurethane.
1. A composite pad useful in removing defects from painted surfaces, comprising:
a layer of backing material adapted for attachment to an orbital polisher or other tool;
an annular ring of material extending outwardly from the backing material and terminating in an annular abrasive outer surface;
an inner body of material permanently disposed at least partially within the annular ring, the inner body of material terminating in a concentric, circular abrasive outer surface that protrudes further outwardly than the annular abrasive outer surface; and
wherein the annular outer surface is less abrasive than the concentric circular surface, enabling the concentric circular surface to be used for initial buffing or polishing operations without tilting the pad, and the annular abrasive outer surface to be used for finer buffing or polishing operations through tilting of the pad.
2. The composite pad of claim 1 , wherein one or both of the annular ring of material and inner body of material are composed of foam.
3. The composite pad of claim 2 , wherein the foam is a polyurethane foam.
4. The composite pad of claim 2 , wherein the layer of backing material includes a hook-and-loop backside adapted for attachment to an orbital polisher or other tool.
5. The composite pad of claim 2 , wherein:
both of the annular ring of material and the inner body of material are both composed of foam; and
the density of the inner body of material is higher than the density of the annular ring of material.
6. The composite pad of claim 1 , wherein the inner body of material is firmer or stiffer than the annular ring of material.