Friction false twister

US4051655A · kind A · utility

Assignee

• Barmag Barmer Maschinenfabrik Aktiengesellschaft · DE

Inventors

• Hellmut Lorenz · Lennep, DE
• Heino Bunger · Radevormwald, DE

Key dates

• Filing date: Jul 28, 1976
• Grant date: Oct 4, 1977
• Expiry date: Jul 28, 1996

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D02G1/082
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

In combination with a friction false twist assembly including yarn supply means to feed a synthetic filamentary polymer yarn to a friction false twisting device and yarn take-up means to collect a false twist texturized yarn from the twisting device, preferably with means to heat-set the false twisted yarn being fed to the twisting device, this invention provides an improved friction false twist element comprising an axially elongated rotational body having a sleeve hub with a plurality of disc-shaped flanges formed integrally thereon at axially spaced positions, the integral hub and flanges being made of a molded, durable and rigid plastics material, e.g. a thermosetting resin, each flange carrying a circular yarn contacting ring as a rim fastened thereto and providing a wear-resistant, roughened outer circumferential surface ideally suited to the friction twisting of the yarn. In a preferred form, the twist element is made up of a thin metallic layer onto which a wear-resistant surface layer is applied. By including a metallic powder filler in the plastic rotational body, sufficient thermal conductivity can be maintained to transfer heat away from the yarn contacting surface.