Shot blasting machine with a belt conveyor for the treatment of metal pieces

Abstract

A shot-blasting machine for the treatment of metal pieces and the related shot-blasting system. In particular, a shot blasting machine provided with special support devices to improve the operation of its conveyor belt, so as to overcome technical drawbacks that are rather common in conventional shot blasting machines having a metallic conveyor belt.

1 . A shot blasting machine having a metallic conveyor belt for the treatment of metal pieces comprising:
 a closed circuit conveyor belt for moving said metal pieces, said conveyor belt comprising a sequence of horizontal slats hinged onto two lateral chains;   one or more centrifugal turbines having the function of projecting abrasive material at high speed against said metal pieces;   at least two support devices positioned below said lateral chains, the at least two support device comprising a sequence of rollers which rotate resting on the links and the pins of said lateral chains during the continuous movement of said conveyor belt.   
     
     
         2 . The shot blasting machine according to  claim 1 , wherein said conveyor belt  4  comprises a concave portion, inside which said metal pieces are hit by a stream of said abrasive material at high speed. 
     
     
         3 . The shot blasting machine according to  claim 1 , wherein said support devices are positioned below said lateral chains of said conveyor belt at said concave portion. 
     
     
         4 . The shot blasting machine according to  claim 1 , wherein said support devices comprise a bearing structure or frame and a sequence of rollers. 
     
     
         5 . The shot blasting machine according to  claim 4 , wherein said frame comprises a support base from which perforated walls branch out, parallel to each other and perpendicular to said support base. 
     
     
         6 . The shot blasting machine according to  claim 1 , wherein said rollers are inserted into holes provided in said perforated walls of said frame. 
     
     
         7 . The shot blasting machine according to  claim 1 , wherein said support devices comprise a sequence of rollers in a number comprised between 8 and 30. 
     
     
         8 . The shot blasting machine according to  claim 7 , wherein said number of rollers is comprised between 10 and 20. 
     
     
         9 . The shot blasting machine according to  claim 1 , wherein said at least two support devices support the continuous movement of the two lateral chains of the conveyor belt. 
     
     
         10 . A shot blasting machine having at least two support devices comprising a sequence of rollers inserted in a support frame, said support devices being positioned below a concave portion of a conveyor belt of said shot blasting machine.