Method of forming coat on inner surface of bearing and apparatus for the same

Abstract

There is provided a method of forming a coat on an inner surface of a bearing, in which a jig 13 is attached to a rotor 2 while holding four bearings 12 for example, so as to form those in a cylinder shape. Then, while the rotor 2 is rotated at a circumferential speed of 0.3 m/sec, a nozzle 8 for airless spraying is inserted into the rotor 2, so that the nozzle 8 injects a coating material 30 from the inside of the bearings 12 toward an inner surfaces of the bearings 12 to apply the coating material thereon. Because the coating material 30 is injected from the nozzle 8 without using compressed air, the fly amount of the coating material is made less as compared to air spray painting.

1 . A method of forming a coat on an inner surface of a bearing having a cylinder shape, including the steps of: 
 rotating the bearing in its circumferential direction; and    applying a coating material to form the coat on the inner surface of said rotating bearing by injecting the coating material from a nozzle by airless spray painting.    
   
   
       2 . A method of forming a coat on an inner surface of a bearing according to  claim 1 , wherein the rotational speed of said bearing in said step of applying the coating material is a circumferential speed of 0.2 m/sec or more.  
   
   
       3 . A method of forming a coat on an inner surface of a bearing according to  claim 1 , further including the step of inserting said nozzle into an inner side of the bearing so as to inject said coating material from the inner side of the bearing.  
   
   
       4 . A method of forming a coat on an inner surface of a bearing according to  claim 2 , further including the step of inserting said nozzle into an inner side of the bearing so as to inject said coating material from the inner side of the bearing.  
   
   
       5 . A method of forming a coat on an inner surface of a bearing according to any one of claims  1 , wherein the pressure applied to the coating material for injecting the material from said nozzle is 1 to 10 MPa.  
   
   
       6 . A method of forming a coat on an inner surface of a bearing according to any one of claims  2 , wherein the pressure applied to the coating material for injecting the material from said nozzle is 1 to 10 MPa.  
   
   
       7 . A method of forming a coat on an inner surface of a bearing according to any one of claims  3 , wherein the pressure applied to the coating material for injecting the material from said nozzle is 1 to 10 MPa.  
   
   
       8 . A method of forming a coat on an inner surface of a bearing according to any one of claims  4 , wherein the pressure applied to the coating material for injecting the material from said nozzle is 1 to 10 MPa.  
   
   
       9 . A method of forming a coat on an inner surface of a bearing according to any one of claims  1 , further including the step of circulating said coating material in a sealed state in a coating material supplying means for supplying the coating material to said nozzle.  
   
   
       10 . A method of forming a coat on an inner surface of a bearing according to any one of claims  2 , further including the step of circulating said coating material in a sealed state in a coating material supplying means for supplying the coating material to said nozzle.  
   
   
       11 . A method of forming a coat on an inner surface of a bearing according to any one of claims  3 , further including the step of circulating said coating material in a sealed state in a coating material supplying means for supplying the coating material to said nozzle.  
   
   
       12 . A method of forming a coat on an inner surface of a bearing according to any one of claims  4 , further including the step of circulating said coating material in a sealed state in a coating material supplying means for supplying the coating material to said nozzle.  
   
   
       13 . A method of forming a coat on an inner surface of a bearing according to any one of claims  5 , further including the step of circulating said coating material in a sealed state in a coating material supplying means for supplying the coating material to said nozzle.  
   
   
       14 . A method of forming a coat on an inner surface of a bearing according to any one of claims  6 , further including the step of circulating said coating material in a sealed state in a coating material supplying means for supplying the coating material to said nozzle.  
   
   
       15 . A method of forming a coat on an inner surface of a bearing according to any one of claims  7 , further including the step of circulating said coating material in a sealed state in a coating material supplying means for supplying the coating material to said nozzle.  
   
   
       16 . A method of forming a coat on an inner surface of a bearing according to any one of claims  8 , further including the step of circulating said coating material in a sealed state in a coating material supplying means for supplying the coating material to said nozzle.  
   
   
       17 - 20 . (canceled)