PRODUCTION OF FRICTION MATERIAL

摘要

PROBLEM TO BE SOLVED: To efficiently produce a friction material excellent in friction capacity in a low cost. SOLUTION: A mold for molding a friction material is filled with a powdery molding material 1 prepared by mixing fibers, a thermosetting resin and a filler and the molding material 1 is heated and pressed to produce the friction material 10. A plurality of projected parts are provided to the inner surface of the mold to form a plurality of recessed parts to the surface of the friction material 10. Therefore, since the powdery molding material is directly supplied into the mold to be molded under heating and pressure, the friction material can be efficiently produced in low cost by one press process. Since recessed parts can be formed at a time of molding under heating and pressure, groove processing becomes unnecessary and the number of works is reduced and this method is not restricted by the shape or dimension of the recessed parts. Flexibility can be imparted to the friction material 10 by providing a plurality of the recessed parts and brake sounding can be effectively suppressed and craking during use can be prevented. The surface area of the friction material 10 is increased and radiation effect is enhanced and the lowering of the coefficient of friction by fade is prevented.