| 摘要 |
PURPOSE:To obtain a friction material having holds or grooves of any desired shape easily at low cost, by embedding a low-melting alloy member in a starting friction material, preforming this material, curing the perform by heating in a mold and post-curing it by heating to allow the alloy member to melt and flow out. CONSTITUTION:In producing a friction material 5 by (a) preforming a friction material 2 comprising a base, a binder, etc., (b) curing the preform 3 by heating in a mold and (c) post-curing it by further heating, said preforming is performed after a low-melting alloy member 1 having a m.p. lying in the range of from the temperature at which heat-curing in step (b) is performed and the temperature at which the post curing in step (c) is performed is embedded in the material, and the low-melting alloy member 1 embedded in step (a) is allowed to melt and flow out during the post curing in step (c). In this way, holes or grooves 4 of any desired shape can be formed on the surface of friction. |
