Contitech Schlauch Gmbh

Ulrich Brettschneider

Horst Schubert

A method for making a charge-air hose for a motor vehicle includes producing a continuous inliner having a cylindrical inner surface in an extrusion process while pneumatically shaping the cylindrical inner surface without a mandrel by bringing the inner cylindrical surface to an inner diameter D. Thereafter, an elastomeric inner ply, a first knit ply, an elastomeric intermediate ply, a second knit ply and an elastomeric outer ply are applied to the inliner successively, coaxially and continuously to form a continuous charge-air hose section. The first and second knit plies are made from an endless yarn and have respective orientations different from each other. Charge-air hose blanks are cut to length and the charge-air hose blanks are shaped with a mandrel defining a curved longitudinal axis and having a diameter Dwhich, in at least a longitudinal segment, is at least 6% greater than the inner diameter D.

Charge-air hose for motor vehicles having two knit plies

An article composed of a polymeric material, especially a material having elastic properties, which has been provided with an embedded reinforcement made wholly or partly of a textile material. In a first reinforcement variant, the textile material is polyoxadiazole (POD), a POD derivative or a POD copolymer, or, in a second reinforcement variant, the textile material is a combination of POD, a POD derivative or a POD copolymer, and at least one further textile material, or, in a third reinforcement variant, the textile material comprises a material combination of POD, a POD derivative or a POD copolymer and at least one further material which is not part of any textile group. The article is particularly a hose and more particularly a charge-air hose having an inner layer and an outer layer of a polymeric material and an embedded reinforcement, for example in the form of a POD knit.

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Osterode, Germany

Ulrich Brettschneider