Heated rotatable roll arrangement

US4629867A · kind A · utility

Assignee

• LENZING AKTIENGESELLSCHAFT · AT

Inventors

• Josef Baumgartinger · Vöcklabruck, AT
• Ernst Rauch · Neumarkt am Wallersee, AT
• Haio Harms · Gmunden, AT
• Adalbert Wimmer · Vöcklabruck, AT

Key dates

• Filing date: Mar 25, 1985
• Grant date: Dec 16, 1986
• Expiry date: Mar 25, 2005

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F28D11/02
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

There is disclosed a heated roll for the thermal treatment of formed products. It includes a driven hollow shaft and a hollow roll body of a circular-ring-shaped cross section and closed on all sides to accommodate a heat transfer medium. Power supply lines for heating elements as well as electric wires of temperature probes are led through the hollow shaft. In order to provide a heated roll to be used without problems both in the low-temperature range and in the high-temperature range up to about 600.degree. C. and to reach a uniform temperature profile over the total operation surface of the roll outer shell and a long service life of the heat transfer medium, without excessive temperature prevailing at the bearings of the driving shaft, and to provide for an easy repair, the hollow shaft is connected with the roll body by a hub. One or several saline compound(s) or (a) low-melting metal(s) or metal alloy(s) are contained in the interior of the hollow roll body. The heating elements are provided in the cylindrical inner part of the roll body. The temperature probes are arranged both in the cylindrical inner part and in the cylindrical outer shell, of the roll body.