Shot blast machine

Abstract

The shot blast machine having a projector with an impeller includes the impeller which is made of a high abrasion-resistant rubber. Therefore, it can increase the durability without damage of the impeller and projectile; it can use the projectile with high grindability, with small particle and light gravity; and it can be used at any condition including extreme cold, normal temperature, wet condition and the like.

1 .- 4 . (canceled)  
   
   
       5 . A blasting machine comprising: 
 a case body;    a support surface within the case that supports a workpiece;    an impeller assembly comprising an impeller wheel cover, a nozzle, and an impeller directing slurry towards the support surface;    at least one showerhead showering said support surface with recirculated liquid;    a vibrating screen receiving debris and liquid runoff and from the workpiece and separating projectile from the debris, the vibrating screen passing therethrough the liquid runoff;    a projectile receiving tank for receiving and storing the separated projectile;    a liquid storing tank for receiving and storing the liquid runoff;    a slurry mixing tank for receiving and mixing projectile and liquid respectively from the projectile receiving tank and the liquid storing tank and for forming the slurry;    a slurry pump for pumping and recirculating the slurry from the slurry mixing tank to the nozzle; and    a liquid pump for pumping and recirculating said liquid from said liquid receiving tank to said showerhead;    first connecting means connecting the liquid storage tank to the liquid pump and the liquid pump to the at least one showerhead;    second connecting means connecting the slurry mixing tank to the slurry pump and the slurry pump to the nozzle, said second connecting means being separate from said first connecting means.    
   
   
       6 . A blasting machine comprising: 
 a case body;    a support surface within the case that supports a workpiece;    an impeller assembly comprising an impeller wheel cover, a nozzle that directs a slurry of liquid and projectile away from said support surface and towards said wheel cover, and an impeller directing the slurry towards the support surface;    at least one showerhead showering said support surface with recirculated liquid;    a vibrating screen receiving debris and liquid runoff and from the workpiece and separating the projectile from the debris, the vibrating screen passing therethrough the liquid runoff;    a slurry mixing tank for receiving and mixing projectile and a portion of the liquid runoff and for forming the slurry; and    means for transporting and recirculating the slurry from the slurry mixing tank to the nozzle including first connecting means connecting the slurry mixing tank to the nozzle; and    a liquid pump for pumping and recirculating another portion of said liquid runoff to said showerhead;    second connecting means connecting the liquid pump to the at least one showerhead; and    said second connecting means being separate from said first connecting means.    
   
   
       7 . The blasting machine of  claim 6  wherein said means for transporting the slurry comprises a slurry pump.  
   
   
       8 . The blasting machine of  claim 7  further comprising: 
 a liquid receiving tank for receiving and storing said another portion of said liquid runoff;    said pump pumping and recirculating said liquid from said liquid receiving tank to said showerhead.    
   
   
       9 . The blasting machine of  claim 8  further comprising: 
 a projectile receiving tank for receiving and storing the separated projectile; and    said slurry mixing tank for receiving and mixing projectile and liquid respectively from the projectile receiving tank and the liquid storing tank and for forming the slurry.    
   
   
       10 . The blasting machine of  claim 7  comprising a plurality of impeller assemblies directing the slurry towards the support surface.  
   
   
       11 . The blasting machine of  claim 7  wherein said support surface is a stationary support surface.  
   
   
       12 . The blasting machine of  claim 7  wherein the support surface comprises: 
 a guide roller adapted for receiving the workpiece therein;    a plurality of rolling conveyors disposed about said guide roller and connected to said guide roller so that rolling of said conveyors rolls said guide roller; and    means for rolling said rolling conveyors.    
   
   
       13 . The blasting machine of  claim 7  wherein the recirculated liquid consists of an aqueous solution.  
   
   
       14 . The blasting machine of  claim 7  wherein the impeller and wheel cover are lined with or formed from abrasion-resistant rubber.  
   
   
       15 . The blasting machine of  claim 6  wherein said means for transporting the slurry comprises a suction hose.  
   
   
       16 . The blasting machine of  claim 12  wherein said means for rolling said rolling conveyors comprises a motor.