Patent
Method of manufacturing a sandwich panel, made of composite material, and a panel thereby obtained
Alain Fournier,Nathalie Duret +1 more
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TLDR
In this article, a stack comprising a core with open cells, a film of intumescent material covering each of the faces of the core and an overlay of dry fibers covering each barrier fabrics is placed in a mold.Abstract:
In order to manufacture a sandwich panel using the RTM technique, a stack comprising a core ( 10 ) with open cells, a film ( 12 ) of intumescent material covering each of the faces of the core ( 10 ), a dry barrier fabric ( 14 ) covering each of the films ( 12 ) and an overlay of dry fibers ( 16 ) covering each of the barrier fabrics is placed in a mold. During polymerization of the films ( 12 ), pressurization of the mold and the presence of the barrier fabrics ( 14 ) prevent penetration of the foam into the overlays ( 16 ). The resin is then injected into the mold and then polymerized, without danger of penetration into the cells of the core ( 10 ).read more
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TL;DR: In this paper, a laminar structure comprising two facing panels separated by a honeycomb structure containing foamed elastomeric material in the cells provides a combination of sound insulation and fire retardancy in a compact light weight foam which can be produced using traditional manufacturing techniques.
References
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Patent
Lightweight, fire-retardant structural panel
TL;DR: In this article, a composite component laminar structural panel, lightweight and fire-retardant, consisting of an inner layer of sheet-like honeycomb composed of aluminum, treated paper to increase the resistance to fire performance, or the like, is presented.
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Resin transfer molding in combination with honeycomb core
Thomas R Cundiff,Bradley A Frye +1 more
TL;DR: In this article, the authors describe a process for making a layered product having a honeycomb core having empty cells, the process comprising the steps of: (a) placing a first layer of an uncured adhesive film on the top side of a central Honeycomb core, and placing a second layer of uncured adhesives on the bottom side of the central core; (b) placing an uncure prepreg material above the first layer and placing another uncure adhesive film below the second layer; (c) placing the charge made by steps inside a mold and closing the mold
Patent
Resin transfer molding with honeycomb core and core filler
TL;DR: In this article, the authors describe a process for making a layered product having a honeycomb core having cells filled with a foam material, the process comprising the steps of: (a) placing a first layer of an uncured, heat-expandable, foamable material on the top side of a central honeycomb having empty cells, and placing a second layer of a heatexpanding, heat expanding, foam-consuming material on bottom side of the central core; (b) placing the charge made by steps inside a mold and closing the mold; (c) heating the
Patent
Composite honeycomb sandwich structure
TL;DR: In this article, a film adhesive is applied to the tiedown plies in the margin of the part outside the net trim line to prevent sliding of plies relative to the mandrel and to one another during autoclave curing.
Patent
Foam filled honeycomb and methods for their production
TL;DR: In this article, high strength foam-filled materials and methods for their production are disclosed, which include cellular structures comprising a plurality of open-ended cells (12, 14, 16, 18) containing polycyanurate foam.