Patent ID: 7610677

Claim:
A method for manufacturing a throttle valve unit, including a throttle valve housing ( 1 , 19 ) and a throttle valve ( 2 ) that can move in relation to it, the method comprising the process steps of: a) injection molding the throttle valve housing ( 1 , 19 ) out of a first plastic material inside a first area, b) inserting at least one bearing bush ( 5 ) that contains a metallic material into the throttle valve housing ( 1 , 19 ), the metallic material and the first plastic material producing a friction state between two relatively hard substances between the at least one bearing bush ( 5 ) and the throttle valve housing ( 1 , 19 ), c) transferring the throttle valve housing ( 1 , 19 ) produced according to process steps a) and b) to a second area that is spatially separate from the first area, and d) injection molding the moving throttle valve ( 2 ) and a valve shaft ( 3 ) in the throttle valve housing ( 1 , 19 ), in one piece out of a second plastic material, inside the second area.