Method of joining structural elements by heating of a binder

Details Method of joining structural elements by heating of a binder Method of joining structural elements by heating of a binder

B - Operations, Transporting

29

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18/969

B29C 65/54 (2006.01) B29C 65/02 (2006.01) B29C 65/14 (2006.01) B29C 65/78 (2006.01) C09J 5/06 (2006.01) F16B 11/00 (2006.01) B29C 65/48 (2006.01)

Patent

CA 2000576

Abstract A method for joining structural elements by heating of a binder, e.g. to form panel assemblies (21) for automobiles, including applying to a first structural element (8,9) a binder (13) at locations thereof intended to form bonding contact with the corresponding locations on a second structural element, mating the second structural element (7) with the first structural element, and hemming an outer edge (8) of the first structural element about a corresponding edge of the second structural element to make the binder contact upper and lower faces of corresponding edges. The combination of the first and second structural elements is brought into contact with a plurality of heating elements (16,20;22,23) at selected, spaced apart spots along an outer edge of the combination. Heat energy is applied at the spots to form a spot bonding between the first and second struc- tural elements thereat by curing the binder at the spots. The remainder of the binder is left uncured, and the the spot-bonded combination is then removed from the heating elements and subjected to subsequent treatment, including treatment in an atmosphere at such elevated temperatures that the spot bonds are post-cured and the remaining binder is fully cured. Fig. 4.

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