Panels utilizing a precured reinforced core and method of...

E - Fixed Constructions – 04 – C

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E04C 2/296 (2006.01) B32B 3/02 (2006.01) B32B 5/18 (2006.01) B62D 25/20 (2006.01) E04C 2/24 (2006.01) E04F 13/08 (2006.01) E04F 13/18 (2006.01) E04F 15/10 (2006.01)

Patent

CA 2678118

A mass transit flooring assembly including a plurality of sandwich panels. The sandwich panels (30) include a top skin (54), a bottom skin (58), a perimeter defining closeout (46), and a core (50) between the top (54) and bottom skin (58) and within the closeout parameter (46). The closeout (46) includes mating surfaces used to connect adjacent panels. The core is a precured reinforced core including a plurality of phenolic ribs and foam strips positioned in an alternating fashion. The precured core is manufactured by impregnating a layer of fabric with phenolic resin between two foam cores and stacking in a similar alternating fashion to create a bun. After the bun is cured at a constant pressure and temperature and cooled, the bun is cut along a plane perpendicular to the plane of the layers to provide a precured reinforced core panel ready to be inserted as a core in a sandwich panel.

La présente concerne un ensemble de plancher pour transport en commun comprenant plusieurs panneaux sandwiches. Les panneaux sandwiches (30) comprennent une membrane supérieure (54), une membrane inférieure (58), un dispositif de fermeture périmétrique (46), et une âme (50) entre la membrane supérieure (54) et la membrane inférieure (58) et dans le périmètre du dispositif de fermeture (46). Le dispositif de fermeture (46) est muni de surfaces de jonction pour raccorder des panneaux adjacents. L'âme est renforcée et durcie et elle est munie de plusieurs nervures phénoliques et de bandes de mousse positionnées en alternance. L'âme durcie est fabriquée au moyen de l'imprégnation d'une couche de tissu avec de la résine phénolique entre deux âmes en mousse et par une superposition en alternance pour créer une pile. Après le durcissement de la pile à une température et à une pression constantes et le refroidissement, la pile est découpée le long d'un plan perpendiculaire au plan des couches afin de fournir un panneau d'âme renforcée et durcie prêt à être inséré dans un panneau sandwich.

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