Method of and an apparatus for producing extrusion profiles

Details Method of and an apparatus for producing extrusion profiles Method of and an apparatus for producing extrusion profiles

B - Operations, Transporting

21

C

205/22

B21C 23/00 (2006.01)

Patent

CA 1086683

ABSTRACT A method of producing extrusion profiles of a desired length comprises the steps of processing a billet of pre- selected billet length in a press measuring the extruded length during the extrusion process, switching off the extrusion process upon reaching the desired extruded length and varying the billet length such as to obtain the optimum butt thickness or switching off the extrusion process upon reaching the minimum permissible butt thickness and enlarging the billet length such as to obtain the desired extrusion length. An apparatus for carrying out said method comprises a billet hot shearing unit which has an adjustable longitudi- nal feed stop and cuts the billets to length. The billets are supplied to and processed in a press, in which a first length recorder measures the butt thickness and from which the extruded profile is drawn out by an extrusion drawing unit. A second length recorder measures the extrusion length. The measured actual values of the butt thickness and the extrusion length are supplied to a controller which compares them alternately with corresponding reference input values of the butt thickness or the extrusion length respec- tively and actuates a positioning element which adjusts said longitudinal feed stop such as to eliminate a difference between said reference and actual values.

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