Method for producing friction plate and apparatus therefor

Abstract

There is provided a method for producing a friction plate, capable of improving the throughput of friction material and reducing the time and work required for adhering friction material segments to a core plate. The method produces a friction plate having oil grooves communicating between the internal periphery and the external periphery, by fixing friction material segments formed from a friction material to a core plate, and is featured by forming the oil grooves by plastic working of the friction material and fixation of the friction material segments with predetermined gaps therebetween to the core plate.

1 - 8 . (cancelled)  
   
   
       9 . An apparatus for producing a friction plate having oil grooves communicating between the internal periphery and the external periphery, by fixing friction material segments formed from a friction material to a core plate, the apparatus comprising: 
 means for punching the friction material of a band shape to obtain plural friction material segments;    means for holding said friction material segments by stacking on a metal mold or a jig and pushing said friction material segments in succession to a side opposite to said metal mold; and    means for pressing and adhering said friction material segments to said core plate;    wherein said oil grooves are formed by plastic working of said friction material and fixation of said friction material segments with predetermined gaps therebetween to said core plate.    
   
   
       10 . An apparatus for producing a friction plate having oil grooves communicating between the internal periphery and the external periphery, by fixing friction material segments formed from a friction material to a core plate, the apparatus comprising: 
 means for punching the friction material of a band shape to obtain plural friction material segments;    means for holding said friction material segments by stacking on a metal mold or a jig and pushing said friction material segments in succession to a side opposite to said metal mold; and    means for pressing and adhering said friction material segments to said core plate;    wherein said oil grooves are formed by cutting of said friction material and fixation of said friction material segments with predetermined gaps therebetween to said core plate.    
   
   
       11 - 12 . (cancelled)  
   
   
       13 . A friction plate formed by fixing friction material segments formed from a friction material to a core plate and having oil grooves communicating between the internal periphery and the external periphery, wherein: 
 said oil grooves are formed by fixing said friction material segments with predetermined gaps therebetween to said core plate and then effecting cutting.