Patent ID: 7351132

Claim:
A method of producing a flap wheel ( 1 ), in particular a flap wheel for satin finishing systems for pipes or for sheet metal, comprising a plurality of radial flaps ( 2 ) fixed to a hub ( 3 ) and placed between two side flanges ( 4 ), wherein the radial flaps ( 2 ) are fixed to the hub ( 3 ) of the flap wheel ( 1 ) by means of coupling means ( 6 , 16 ) integral with the hub ( 3 ) of the flap wheel ( 1 ) and inserted in seats ( 8 ) formed in each flap ( 2 ) near the edge ( 14 ) thereof adjacent to the hub ( 3 ), wherein the coupling means ( 6 ) consist of a plurality of C-shaped circular crowns having an inside diameter less than the outside diameter of the hub ( 3 ) and partially sunken in the hub ( 3 ), comprising at least the following steps: preparing the hub ( 3 ) carrying the coupling means ( 6 , 16 ), the radial flaps ( 2 ) and the side flanges ( 4 ); inserting the coupling means ( 6 , 16 ) integral with the hub ( 3 ) into seats ( 8 ) formed in each radial flap ( 2 ) in proximity to the edge ( 14 ) thereof adjacent the hub ( 3 ); applying the side flanges ( 4 ) to the flap wheel ( 1 ), placing the flap wheel ( 1 ) in a mould and heating it; rotating the heated flap wheel ( 1 ); and pouring into the hub ( 3 ) an adhesive that flows out of a plurality of rows of through holes ( 9 ) formed in the wall of the hub ( 3 ).