| 摘要 |
A friction element for a motor car or motor cycle disc brake is produced by pressing a powdered friction material in a die cavity using first and second resistance heating electrodes. The friction material is thereby sintered and bonded to a backing plate which closes one end of the die cavity. The first electrode has a backing plate-engaging end surface formed with a recess therein which is partly filled by a graphite insert which is less electrically conductive than the remainder of the first electrode. The second electrode may have a similar insert therein and may either engage the friction material directly or through the intermediary of a graphite sub-electrode. In this way, a good electrical contact between the friction material and the electrode and a uniform current flow through the material can be obtained.
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