Process for cooling flat plastic products

US8262966B2 · kind B2 · utility

Assignee

• BATTENFELD-CINCINNATI GERMANY GMBH · DE

Inventors

• Klaus Becker · Wetter, DE
• Michael Käthler · Bielefeld, DE

Key dates

• Filing date: Nov 5, 2009
• Grant date: Sep 11, 2012
• Expiry date: Jun 18, 2030

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C2948/92923
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Method for cooling flat plastic products, in which plasticized plastic compound is fed to a calender via a slot nozzle by means of an extruder and is rolled and calibrated to the desired shape in this calender between at least two smoothing rolls, after which the film or sheet produced in this way is fed to a chill section comprising a plurality of adjustable rolls and passes through this section until it is sufficiently cool and dimensionally stable, at least both the gap width between the rolls and the speed of the rolls being controllable by open- and/or closed-loop control.The degree of wrap of the flat plastic product around the respective roll is varied by adjusting the rolls in the chill section into a mutually offset arrangement, hence increasing or minimizing the cooling capacity.