Wet type friction member and manufacturing method for the same

Abstract

A friction plate 22 is formed by pasting a friction member 25 to a core plate 23 of a metal. Numeral 24 designates a spline teeth fitted to a torque transmitting member. The friction member has a nonwoven cloth including aramide fiber and at least one of carbon fiber, carbonized fiber, cellulose fiber and rayon. A thermo-hardening resin includes a friction conditioner, and is impregnated to the friction member. Further, a distribution rate of the friction conditioner is made to be high at a friction surface and is gradually lowered toward a bottom surface. Further, in manufacturing the wet type friction member, a roll, an ultrasonic wave transmitter, a vacuuming apparatus on the like is used.

1 . A wet type friction member, comprising: 
 a nonwoven cloth including aramide fiber and at least one of carbon fiber, carbonized fiber, cellulose fiber and rayon; and    a thermo-hardening resin having a friction conditioner, the thermo-hardening resin being impregnated to the non-woven cloth.    
   
   
       2 . The wet type friction member as set forth in  claim 1 , wherein a distribution rate of the friction conditioner is high at a friction surface of the friction member and gradually becomes lower toward a bottom surface thereof.  
   
   
       3 . A manufacturing method for a wet type friction member which has a nonwoven cloth including aramide fiber and at least one of, carbon fiber, carbonized fiber, cellulose fiber and rayon; and 
 a thermo-hardening resin including a friction conditioner and impregnated to the nonwoven cloth, the method comprising steps of:    supplying the thermo-hardening resin including the friction conditioner onto the nonwoven cloth; and    impregnating the thermo-hardening resin into the nonwoven cloth via a diffusing unit.    
   
   
       4 . The manufacturing method for the wet type friction member as set forth in  claim 3 , wherein a distribution rate of the friction conditioner is high at a friction surface of the friction member and gradually becomes lower toward a bottom surface thereof.  
   
   
       5 . The manufacturing method for the wet type friction member as set forth in  claim 3 , wherein a surface of the nonwoven cloth supplied with the thermo-hardening resin including the friction conditioner is aside of as sliding surface of the friction member.  
   
   
       6 . The manufacturing method for the wet type friction member as set forth in  claim 3 , wherein the diffusing unit makes the nonwoven cloth passed between rolls so as that the thermo-hardening resin including the friction conditioner is impregnated into the nonwoven cloth by pressing the roll.  
   
   
       7 . The method for manufacturing a wet type friction member as set forth in  claim 3 , wherein the diffusing unit impregnates the thermo-hardening resin including the friction conditioner into the nonwoven cloth by an ultrasonic transmitter in the impregnating step.  
   
   
       8 . The method for manufacturing a wet type friction memberasset forth in  claim 3 , wherein the diffusing unit is installed with a vacuuming apparatus on a lower side of the nonwoven cloth and the thermo-hardening resin including the friction conditioner is impregnated into the nonwoven cloth by sucking from the lower side.  
   
   
       9 . The manufacturing method for the wet type friction member as set forth in  claim 4 , wherein a surface of the nonwoven cloth supplied with the thermo-hardening resin including the friction conditioner is a side of a sliding surface of the friction member.  
   
   
       10 . The manufacturing method for the wet type friction member as set forth in  claim 4 , wherein the diffusing unit makes the nonwoven cloth passed between rolls so as that the thermo-hardening resin including the friction conditioner is impregnated into the nonwoven cloth by pressing the roll.  
   
   
       11 . The method for manufacturing a wet type friction member as set forth in  claim 4 , wherein the diffusing unit impregnates the thermo-hardening resin including the friction conditioner into the nonwoven cloth by an ultrasonic transmitter in the impregnating step.  
   
   
       12 . The method for manufacturing a wet type friction member as set forth in  claim 4 , wherein the diffusing unit is installed with a vacuuming apparatus on a lower side of the nonwoven cloth and the thermo-hardening resin including the friction conditioner is impregnated into the nonwoven cloth by sucking from the lower side.  
   
   
       13 . The manufacturing method for the wet type friction member as set forth in  claim 5 , wherein the diffusing unit makes the nonwoven cloth passed between rolls so as that the thermo-hardening resin including the friction conditioner is impregnated into the nonwoven cloth by pressing the roll.  
   
   
       14 . The method for manufacturing a wet type friction member as set forth in  claim 5 , wherein the diffusing unit impregnates the thermo-hardening resin including the friction conditioner into the nonwoven cloth by an ultrasonic transmitter in the impregnating step.  
   
   
       15 . The method for manufacturing a wet type friction member as set forth in  claim 5 , wherein the diffusing unit is installed with a vacuuming apparatus on a lower side of the nonwoven cloth and the thermo-hardening resin including the friction conditioner is impregnated into the nonwoven cloth by sucking from the lower side.