Method and injection mould for the production of an intake system composed of plastic for internal combustion engines and intake system produced

US8590508B2 · kind B2 · utility

Assignee

• Mahle International GmbH · DE

Inventors

• Werner Schnabel · Nattheim, DE
• Siegfried Deiss · Gomaringen, DE

Key dates

• Filing date: Sep 10, 2007
• Grant date: Nov 26, 2013
• Expiry date: May 12, 2030

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D9/1095
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a method which uses an injection mold for the production of an intake system which is composed of plastic and is intended for internal combustion engines, and which has a plurality of parallel-running intake pipes and which has, arranged in the intake pipes, throttle flaps operated by way of a shared shaft bearing against bearings located in the walls of the intake pipe. A simplified production process is obtained if two mandrels (1, 2) of the injection mold, intended for formation of apertures for the bearings, are inserted respectively from one side of the injection mold in such a way that ends of the mandrels (1, 2) bear against one another in the injection mold, and if the method of production of apertures situated further outwards, with respectively greater diameter than the adjacent inwardly situated apertures is such that each mandrel (1, 2) is of staged shape, and the mandrels (1, 2) are drawn out during demolding at the two sides of the injection mold.