Method for producing a worm wheel for a power steering system of a motor vehicle, a worm wheel and a motor vehicle steering system

摘要

The present invention relates to a method for producing a worm wheel (1) for power steering of a motor vehicle, which has a connecting body (83) with an externally rotating gear rim (2) and a hub (4), and which has a worm wheel volume made from a thermoplastic has, by thermoplastic shaping in a mold cavity (7) delimited between two mold halves (61, 62) of a mold (6). In order to enable lower manufacturing costs and improved properties of the plastic, the following steps are proposed according to the invention: - providing the mold cavity (7) in a filling state with a starting volume greater than the worm wheel volume, - filling in a cake (8) made of flowable plastic melt with a specified viscosity into the mold cavity (7), the mass cake (8) having a predetermined amount of plastic corresponding to the worm wheel volume smaller than the start volume, the mass cake (8) is pressed in the mold cavity (7), - removal of the worm wheel (1) after the plastic has solidified from the mold cavity.