Robert Boschgmbh

Zexel Valeo Compressor Europe Gmbh

Wolfram Hasert

Leonardo Cadeddu

Johannes Meiwes

Wolf-Ingo Ratzel

Christian Lorenz

Jochen Kaesser

Hans Staudenmaier

Hans Deierling

Olaf Pflugmacher

Roland Schreiber

Monica Pilone

Angel Luis Castillo Redondo

Matthias Jaeger

Alfonso Martinez Lesma

Dieter Ahrens

A method for manufacturing a throttle valve unit having a housing part and a valve flap part that can move in relation to it includes the steps of injection molding the housing part of a first plastic material in a first cavity, transferring the molded housing part to a second cavity spatially decoupled from the first cavity, and injection molding the movable valve flap part out of a second plastic material in a second mold cavity inside the molded housing part. Before the molded housing part is transferred to the second cavity, it is subjected to an intermediate treatment in order to influence the shrinkage behavior, thereby selectively adjusting the gap geometries between the parts.

Method for producing a throttle valve unit in a two-component injection molding process

A vane cell vacuum pump has a rotor, in which a plastic vane, which with at least terminal part engages the inner wall of the jacket of a pump housing, is guided longitudinally. The body of the vane comprises a duroplastic and is united with the terminal part, of thermoplastic by an injection-molding operation. With the material comprising the body, high mechanical strength is attained, while with the material of the terminal part, high wear resistance and a low coefficient of friction are attained.

Plastic vane for a vane-cell vacuum pump

Growing community of inventors

Weinstadt, Germany

Wolfram Hasert