Method for manufacturing a toothed wheel with reinforcing strapping

A method for manufacturing a wheel, said method comprising:

• a step (a) of producing a carrier core by injection of a first polymer material in a first mold, wherein the carrier core extends from a radially inner wall forming a bore having a main axis, corresponding to an axis of rotation of the wheel, up to a radially outer peripheral edge, and
• a coating step (b) during which a coating layer of a second polymer material is formed over the carrier core by an overmolding operation in order to form a rim about the peripheral edge, in the radial over-thickness of the radially outer surface of said peripheral edge,
• wherein, during the step (a) of producing the carrier core, and before the injection of the first polymer material, a preformed reinforcing ring made of a third material is placed in the first mold, in a position substantially centered on the main axis, then is embedded, at least partially, in the mass of said first material which forms the peripheral edge while injecting the first material, wherein the third material is distinct from the first polymer material and from the second polymer material and has a Young's modulus greater than a Young's modulus of the first material and greater than a Young's modulus of the second material, and
• wherein the reinforcing ring is formed by a reinforced tape made in a composite reinforcing material which comprises a frame made of continuous reinforcing fibers that extend along the perimeter of the reinforcing ring, according to a direction orthoradial to the main axis, said frame being embedded in a matrix made of thermoplastic polymer material.