Patent · US Active

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

US7790083B2 · kind B2 · utility

1Cited by

8References

10Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Christian Lorenz · Hamburg, DE
Wolfram Hasert · Waiblingen, DE
Johannes Meiwes · Markgröningen, DE
Wolf-Ingo Ratzel · Echterdingen, DE
Jochen Kaesser · Winnenden, DE
Roland Schreiber · Ottobrunn, DE

Key dates

Filing date	Jun 15, 2004
Grant date	Sep 7, 2010
Priority date	—
Expiry date	Oct 2, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D9/107
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.