Flap wheel, in particular flap wheel for satin finishing systems for pipes or for sheet metal and method of producing the same

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).