Abstract: The invention relates to a hollow chamber profile made of metal, especially for heat exchangers. Said profile is made of an extruded base profile (10) having two broad parallel sides and two narrow sides or is made of a base profile which is a circular tube type or coaxial tube type. At least one channel (11) extends inside said base profile in the longitudinal direction thereof. The hollow profile has improved heat transfer properties on the sides and webs (13) which are deformed perpendicular to the longitudinal direction thereof.

Abstract: The invention relates to an extruded composite profile (10) and to method for separately winding two individual simultaneously extruded tubes (20, 30) with the aid of a winding device. The inventive extruded composite profile (10) consists of at least two individual tubes (20, 30) connected to each other with the aid of a thin binding site which makes it possible to extrude thereof in such a way that they run out from an extruder (a) at an identical velocity (v1). Said output velocity is regulated by a regulating device (D) in order to obtain a constant velocity (v2) prior to dividing the extruded composite profile (10) into said individual tubes by means of a dividing device (E) which are wound afterwards. The levelling of the tubes output velocity (v1) and the winding velocity (v3) corresponding to (v2) makes it possible to carry out a low-cost winding of several simultaneously extruded profiles.

Abstract: The invention relates to an extruded composite profile (10) and to method for separately winding two individual simutaneously extruded tubes (20, 30) with the aid of a winding device. The inventive extruded composite profile (10) consists of at least two individual tubes (20, 30) connected to each other with the aid of a thin binding site which makes it possible to extrude thereof in such a way that they run out from an extruder (a) at an identical velocity (v1). Said output velocity is regulated by a regulating device (D) in order to obtain a constant velocity (v2) prior to dividing the extruded composite profile (10) into said individual tubes by means of a dividing device (E) which are wound afterwards. The levelling of the tubes output velocity (v1) and the winding velocity (v3) corresponding to (v2) makes it possible to carry out a low-cost winding of several simultaneously extruded profiles.

Abstract: The invention relates to a hollow chamber profile made of metal, especially for heat exchangers. Said profile is made of an extruded base profile (10) having two broad parallel sides and two narrow sides or is made of a base profile which is a circular tube type or coaxial tube type. At least one channel (11) extends inside said base profile in the longitudinal direction thereof. The hollow profile has improved heat transfer properties on the sides and webs (13) which are deformed perpendicular to the longitudinal direction thereof.