Insulating strip for door, window or façade elements, composite profile for door, window or façade elements, and method for finishing manufacturing of a roll-in head of an insulating strip for door, window or façade elements

A method for manufacturing a composite profile for doors, windows, or facade elements, the composite profile comprising a first profile having a first tensile strength of less than 300 N/mm2 and a first roll-in groove extending in a longitudinal direction (z) and a second profile having a second roll-in groove extending in the longitudinal direction (z), the method comprising:

• providing an insulating strip having a strip body made of an insulating material and extending in the longitudinal direction (z), the insulating strip further including a first roll-in head at a first longitudinal edge of the strip body and a second roll-in head at a second longitudinal edge of the strip body, each of the roll-in heads having a cross-sectional shape in a plane (x-y) perpendicular to the longitudinal direction (z), a first thickness (a2) of the cross-sectional shape towards a distal outer edge of each roll-in head being larger than a second thickness (a1) of the cross-sectional shape of each roll-in head at a transition from the roll-in head to the strip body,
• providing a first sheet and a second sheet each made of or comprising a metal material with a second tensile strength of 300 N/mm2 or more,
• knurling at least one surface of the first sheet and at least one surface of the second sheet,
• bending the first sheet around the first roll-in head with the knurled surface of the first sheet facing away from the first roll-in head so that the first sheet covers at least three sides of the first roll-in head,
• bending the second sheet around the second roll-in head with the knurled surface of the second sheet facing away from the second roll-in head so that the second sheet covers at least three sides of the second roll-in head,
• pressing protrusions on the first sheet into the first roll-in head and pressing protrusions on the second sheet into the second roll-in head,
• sliding the first roll-in head covered by the first sheet into the first roll-in groove,
• sliding the second roll-in head covered by the second sheet into the second roll-in groove,
• deforming a wall of the first roll-in groove to secure the first roll-in head in the first groove, and
• deforming a wall of the second roll-in groove to secure the second roll-in head to the second roll-in groove.

A method for finishing manufacturing of a roll-in head of an insulating strip for connecting profiles of a composite profile for doors, windows or façade elements, at least one of the profiles being made of a metal material having a first tensile strength of less than 300 N/mm2 and having at least one roll-in groove for roll-in connection with the insulating strip, the insulating strip comprising a strip body made of an insulating material and extending in a longitudinal direction (z), and a roll-in head at a longitudinal edge of the strip body, the roll-in head having a cross-sectional shape in a plane (x-y) perpendicular to the longitudinal direction (z) configured to be inserted into the at least one roll-in groove, a first thickness (a2) of the cross-sectional shape of the roll-in head towards a distal outer edge of the roll-in head facing the at least one roll-in groove being larger than a second thickness (a1) of the cross-sectional shape of the roll-in head at a transition from the roll-in head to the strip body, the method comprising:

• providing a sheet made of or at least comprising a metal material that has a second tensile strength of 300 N/mm2 or more,
• knurling a surface of the sheet on at least one of its sides,
• disposing the sheet on the roll-in head such that the knurled surface of the sheet faces away from the roll-in head and such that a first portion of the sheet overlies a first surface of the roll-in head,
• bending the sheet along a transitional edge of the roll-in head such that a second portion of the sheet overlies the transitional edge and a second surface of the roll-in head, and
• pressing the sheet onto the roll-in head.