Device on a carding machine for cotton, synthetic fibres or the like, having a rotatable strippiing roller

Abstract

A device for a flat card or roller card for cotton, synthetic fibres and the like having a doffer and nip rolls, the device including a stripper roll adapted for being rotatably mounted between the doffer and the nip rolls for stripping fibre material from the doffer and delivering the stripped fibre to the nip rolls. The stripper roll has a roll body having clothing teeth in a region of its curved surface. The clothing teeth of the clothing are formed directly on the curved surface of the roll body. The roll body and the clothing teeth of the clothing are of one-piece construction.

1 ) Device on a flat card or roller card for cotton, synthetic fibres and the like, in which a rotatably mounted stripper roll is arranged between a doffer and nip rolls, which stripper roll strips fibre material from the doffer and delivers it to the nip rolls, wherein the stripper roll has a roll body which is provided with clothing teeth in the region of its curved surface, characterised in that the clothing teeth ( 6 ′ to  6   n ) of the clothing ( 6   a ) are formed directly on the curved surface ( 6   d ) of the roll body ( 6   c ), the roll body ( 6   c ) and the clothing teeth ( 6   1  to  6   n ) of the clothing ( 6   a ) being of one-piece construction. 
     
     
         2 ) Device according to  claim 1 , characterised in that the gullets ( 6 ′ to  6   m ) between adjacent clothing teeth ( 6   1  to  6   n ) in the circumferential direction (B) of the stripper roll ( 6 ) are formed directly in the curved surface ( 6   d ) of the roll body ( 6   c ) by recesses that are open on one side. 
     
     
         3 ) Device according to  claim 1  or  2 , characterised in that the gaps ( 6 * to  6   p ) between adjacent clothing teeth ( 6   1  to  6   n ) in the longitudinal direction (C) of the stripper roll ( 6 ) are formed directly in the curved surface ( 6   d ) of the roll body ( 6   c ) by recesses that are open on one side. 
     
     
         4 ) Device according to any one of  claims 1  to  3 , characterised in that the clothing teeth are formed directly from the roll body by a material-removing process. 
     
     
         5 ) Device according to any one of  claims 1  to  4 , characterised in that the clothing teeth are formed by a chip-removing process. 
     
     
         6 ) Device according to any one of  claims 1  to  5 , characterised in that the clothing teeth are milled directly out of the roll body. 
     
     
         7 ) Device according to any one of  claims 1  to  6 , characterised in that the clothing teeth are formed from the roll body by planing. 
     
     
         8 ) Device according to any one of  claims 1  to  7 , characterised in that the clothing teeth are formed from the roll body by turning. 
     
     
         9 ) Device according to any one of  claims 1  to  8 , characterised in that the clothing teeth are formed from the roll body by laser treatment. 
     
     
         10 ) Device according to any one of  claims 1  to  9 , characterised in that the gullets and the gaps between adjacent clothing teeth are formed from the roll body by a material-removing process, for example by a chip-removing process, milling, planing, turning, laser treatment. 
     
     
         11 ) Device according to any one of  claims 1  to  10 , characterised in that the gullets and the gaps between adjacent clothing teeth are formed by processing on a lathe. 
     
     
         12 ) Device according to any one of  claims 1  to  11 , characterised in that the clothing teeth are arranged helically relative to the rotational axis in the longitudinal direction. 
     
     
         13 ) Device according to any one of  claims 1  to  12 , characterised in that the clothing teeth are arranged helically relative to the rotational axis in the circumferential direction. 
     
     
         14 ) Device according to any one of  claims 1  to  13 , characterised in that recesses extend coaxially with respect to the rotational axis in the longitudinal direction. 
     
     
         15 ) Device according to any one of  claims 1  to  14 , characterised in that recesses extend parallel to the rotational axis in the longitudinal direction. 
     
     
         16 ) Device according to any one of  claims 1  to  15 , characterised in that recesses extend helically relative to the rotational axis in the longitudinal and circumferential directions. 
     
     
         17 ) Device according to any one of  claims 1  to  16 , characterised in that recesses each extend parallel to adjacent recesses in the circumferential direction. 
     
     
         18 ) Device according to any one of  claims 1  to  17 , characterised in that recesses extend helically relative to the rotational axis in the circumferential direction. 
     
     
         19 ) Device according to any one of  claims 1  to  18 , characterised in that the recesses taper in the radial direction—seen in cross-section through the roll body. 
     
     
         20 ) Device according to any one of  claims 1  to  19 , characterised in that the recesses taper in the direction of the rotational axis—seen in a plan view onto the roll body. 
     
     
         21 ) Device according to any one of  claims 1  to  20 , characterised in that the clothing teeth are formed by helical grooves applied to the outer wall of the roll body and by incisions which form the front face and the rear face of the clothing teeth. 
     
     
         22 ) Device according to any one of  claims 1  to  21 , characterised in that the recesses are substantially V-shaped parallel or helically relative to the rotational axis. 
     
     
         23 ) Device according to any one of  claims 1  to  22 , characterised in that the recesses are substantially trapezoidal in shape parallel or helically relative to the rotational axis—seen in the circumferential direction B. 
     
     
         24 ) Device according to any one of  claims 1  to  23 , characterised in that the angle a between the tooth front and the tooth back of adjacent teeth is about from 60° to 70°. 
     
     
         25 ) Device according to any one of  claims 1  to  24 , characterised in that the recesses—seen in the longitudinal direction C—are substantially square or rectangular in shape. 
     
     
         26 ) Device according to any one of  claims 1  to  25 , characterised in that the roll body is a solid cylinder. 
     
     
         27 ) Device according to any one of  claims 1  to  26 , characterised in that the roll body is a hollow cylinder. 
     
     
         28 ) Device according to any one of  claims 1  to  27 , characterised in that the roll body is formed from aluminium or an aluminium alloy. 
     
     
         29 ) Device according to any one of  claims 1  to  28 , characterised in that the roll body consists of steel. 
     
     
         30 ) Device according to any one of  claims 1  to  29 , characterised in that the roll body is deburred after the chip-removing process, for example after milling. 
     
     
         31 ) Device according to any one of  claims 1  to  30 , characterised in that the roll body is deburred by an acid bath. 
     
     
         32 ) Device according to any one of  claims 1  to  31 , characterised in that the deburred roll body is covered with a hard layer. 
     
     
         33 ) Device according to any one of  claims 1  to  32 , characterised in that the hard layer is a hard electrolytically oxidised aluminium. 
     
     
         34 ) Device on a flat card or roller card for cotton, synthetic fibres and the like, in which there is arranged a rotatably mounted roll which takes up and delivers fibre material, wherein the roll has a roll body that is provided with clothing teeth in the region of its curved surface, especially in accordance with any one of  claims 1  to  33 , characterised in that the clothing teeth are formed directly on the curved surface of the roll body, the roll body ( 6   c ) and the clothing teeth ( 6   a  to  6   c ) of the clothing ( 6   a ) being of one-piece construction. 
     
     
         35 ) Device according to  claim 34 , characterised in that the roll is a feed roll ( 1 ).