| 摘要 |
PCT No. PCT/FI83/00005 Sec. 371 Date Sep. 23, 1983 Sec. 102(e) Date Sep. 23, 1983 PCT Filed Jan. 25, 1983 PCT Pub. No. WO83/02651 PCT Pub. Date Aug. 4, 1983.A procedure for manufacturing a brake block comprising a body (1) and a friction bit (5,6), wherein the friction bit is pressed fast to the body (1) with the aid of heat effect so that the central region (6) of the friction bit will be softer than the margins (5) of the friction bit. The friction bit is pressed so that upon the body (1) are placed two friction material courses (5,6) of different hardness material, the harder friction material against the body, whereafter the materials are pressed together and at the same time are pressed fast to the body in such manner that the harder friction material is freely allowed to flow into a widening in the lower part of the press. The harder friction material placed against the body will spread to the margins, whereby a friction bit is obtained which has a friction surface (6) with desired friction coefficient and harder margins (5), by which is prevented the ingress of abrasive foreign bodies in between the friction surface and the brake disk. |
