| 摘要 |
<p>PURPOSE:To prevent the cracking of the basic material of the piston by joining refractory material to the open end of the piston contacting with the back metal of a pad by a method of simultaneous molding. CONSTITUTION:A refractory ring 5-a is joined to the partial thick part of the upper surface of the open end 2 of the disc-shaped brake piston 1 made of resin, by a method of simultaneous molding. As the refractory ring 5-a, for instance, a ceramics ring, a sintered alloy ring, a perforated steel plate ring and a carbonfiber cloth ring and a cylindrical body with a flange made of ceramics, steel, copper, stainless steel, glass or the like are employed. By this constitution, the thermal transmission from the friction pad (not shown in the figure) to the open end 2 is moderated and thereby cracking of the basic material of the piston can be prevented.</p> |
