Friction material for wet running clutches, with a controlled porosity

摘要

The invention proposes a device of the type comprising a support (20), in particular metallic, a surface of the interface forms a support for a friction liner (24), of generally annular shape, made from a friction material which has a porous structure with intercommunicating cells and which comprises the zones (m1, m2, m3) of different porosities and controlled, and of the type in which the method of manufacture of the friction pad includes a step of molding under pressure, characterized in that the surface of the interface of the support comprises at least one groove (26, 34) in which extends the friction material molded under pressure in order to constitute a controlled porosity (m1, m2) greater than the mean porosity (m2, m3) of the body made of a friction material constituting the lining (24), in particular in order to form a channel (26) of the circulation of the oil to the inside of the friction liner (24).