Patent ID: 8377244
Filing Date: 2013-02-19
Classification: B29C,B32B,B64C,F16B,Y10T

Abstract:
1. A method of fabricating a panel comprising a core made of honeycomb material having a plurality of cells and encased by top and bottom outer walls defining between them an enclosure for receiving the core, the panel incorporating at least one fastener element that is accessible from at least one outer wall of the panel and that is suitable for co-operating with complementary fastener means of a structure, which method comprises during a preparation stage: fabricating the top outer wall, and cutting out at least one outer orifice per fastener element that is to open out into the top outer wall; fabricating the bottom outer wall; cutting out a plate of honeycomb material to fabricate the core, and perforating one internal orifice per fastener element in the core in order to provide a space for receiving the fastener element; and coating at least one layer of a film of intumescent adhesive on a connection side wall of the fastener element that is to be connected to the core; and then, during an assembly stage following the preparation stage and during which the panel is assembled: placing the top outer wall on a molding bench; covering the top outer wall in a film of adhesive, and then applying the core against the top outer wall, the fastener element being arranged in the corresponding space in the core for receiving it equally well either during the preparation stage after perforating the internal orifice, or after the core has been arranged on the top outer wall; covering the core in a film of adhesive and then applying the bottom outer wall against the core; and then polymerizing the assembly comprising the top outer wall, the core provided with the fastener element, and the bottom outer wall in order to obtain the panel provided with the fastener element wherein the fastener element has given first internal dimensions, each internal orifice cut out in the core presents peripheral dimensions smaller than the first internal dimensions, being defined by a connection course of cells of the core, and the connection course of cells is pressed back so as to flatten at least the connection course of cells in order to obtain a smooth connection surface around the internal orifice; and wherein after inserting a fastener element in a space for receiving it, the connection course is moved towards the fastener element so as to minimize a gap between the connection course and a film of intumescent adhesive surrounding the side wall of the fastener element.