Method for producing a rod-shaped composite part and rod-shaped composite part

US6478494B1 · kind B1 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Wilhelm Eckl · Karlsruhe, DE
• Helmut Nägele · Remchingen, DE
• Jürgen Pfitzer · Remchingen, DE
• Norbert Eisenreich · Remchingen, DE
• Peter Eyerer · Karlsruhe, DE
• Peter Elsner · Remchingen, DE

Key dates

• Filing date: Jul 11, 2001
• Grant date: Nov 12, 2002
• Expiry date: Jul 11, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2293/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A method for producing a substantially rod-shaped composite body (6) consists of a core (4) enveloped by at least one polymer, according to which the plasticized polymer (5) is extruded onto the core (4). At least one natural polymer is used and a sliding agent on the basis of native oils and/or waxes is added before or during extrusion. The method is used for the production of writing, drawing, cosmetic pencils.