Method of attaching an element to a panel

Details Method of attaching an element to a panel Method of attaching an element to a panel

B - Operations, Transporting

23

P

26/28

B23P 11/00 (2006.01) B23P 19/06 (2006.01) F16B 37/06 (2006.01) F16B 35/06 (2006.01)

Patent

CA 1318778

152,449 METHOD OF ATTACHING AN ELEMENT TO A PANEL ABSTRACT OF THE DISCLOSURE A method of attaching a self-attaching element, including self- piercing element, to a panel in a die member The self-attaching element includes a tubular barrel portion having a free open end and may include a piercing surface at the free end of the barrel portion. The die member includes an annular concave die cavity which surrounds a center die post. The method includes coating at least the tubular barrel portion with a fluorocarbon coating, such as polymerized tetrafluoroethylene, prior to the installation of the fastening element to the panel. The tubular barrel portion is then driven through an opening formed in the panel generally coaxially aligned with the die member center post. The opening may be preformed or more preferably pierced by the piercing surface of the barrel portion. The coated internal surface of the tubular barrel portion is then driven against the external surface of the die post, and then against the bottom surface of the concave die cavity, forming a channel-shaped end portion which receives the edge of the panel, forming a mechanical interlock. The friction-resistant fluorocarbon coating on the barrel portion significantly improves the panel installation, including the integrity of the joint, torque resistance and sealing.

587411

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