A friction assembly has a support plate, at least one brake pad and at least one reinforcing foil of the plate. The brake pad and the support plate are co-moulded from at least one heat-resistant resin. The reinforcing foil is fixed to the support plate via anchoring projections, joined to and which extend away from the foil, embedded in the resin to prevent or limit deformations of the support plate in the use of the assembly.