Patent ID: 9017053
Filing Date: 2015-04-28
Classification: B29C

Abstract:
1. A device for the cooling of a film for a film extrusion apparatus, the device comprising: a cooling device, wherein a flow volume of cooling gas can flow out of the cooling device at a cooling gas temperature, in such a manner that the flow volume of cooling gas can flow over the film, wherein means are included such that the flow volume of cooling gas and the cooling gas temperature can be adjusted simultaneously, wherein at least one valve element is arranged in the cooling device, wherein it is possible by means of the same to modify the flow volume of cooling gas, and in that the valve element is a deformable bimetal adjuster element, by means of which it is possible to modify the flow volume of cooling gas upon modification of the cooling gas temperature, by means of narrowing or enlarging a cross-section of the cooling gas channel arranged in the cooling device, wherein the flow volume of cooling gas can be fed through said cooling gas channel, wherein a heating element is integrated into the cooling device and wherein the bimetal adjuster element is coupled to the heating element in such a manner that the flow volume of cooling gas which flows around the bimetal adjuster element simultaneously functions so that the bimetal adjuster element accordingly deforms or adjusts via the change in the cooling gas temperature, wherein the flow volume of cooling gas can be varied in this way.