METHOD FOR SETTING THE SIZES OF BLOWN FILM TUBES AS WELL AS A BLOWN FILM SYSTEM WITH A CONTROL DEVICE FOR CARRYING OUT THE METHOD

摘要

The invention relates to a method for setting the sizes of blown film tubes (1), which are extruded by blow film systems (15), in which the film tube size is changed to a final size of a film tube (1) an in which the layer of the frost area (3) is optimized during the size change by setting the power of the cooling fan. Physical parameters of the initial and final size of the film tube (1) are stored in the control device (31). The control device (1) takes these physical parameters into account when generating control signals. In addition, these control signals underlie the control of the cooling fan power.