Insulated formwork panels and process for their manufacture

Details Insulated formwork panels and process for their manufacture Insulated formwork panels and process for their manufacture

E - Fixed Constructions

04

C

E04C 2/20 (2006.01) B29C 44/12 (2006.01) B29C 44/30 (2006.01) E04B 2/86 (2006.01)

Patent

CA 2422365

The formwork panel is made of an insulating material and incorporates a corrugated reinforcing metal core, which yields a very strong pressure-resistant panel. The panel is also heat and/or cold insulating and moisture resistant. Therefore, it can efficiently be used to build up permanent self-supporting formworks into which concrete can be cast to form insulated walls. The present invention is also concerned with a process for the manufacture of such panels in a continuous manner, in which the metal cores of the formwork panels are manufactured in the form of a continuous metal core band, which is supplied onto a main conveyor. Simultaneously, a mixture of components is prepared to make insulating foam and is continuously injected at the inlet of the main conveyor to expand so as to form foam incorporating the metal core, which is compressed into a continuous main body band. This continuous main body band is finally cut at the outlet of the main conveyor to obtain the requested panels.

L'invention concerne un panneau de coffrage composé d'un matériau isolant et comprenant un noyau de renfort en métal. Ce noyau qui est en métal ondulé, permet de rendre ce panneau très solide et très résistant à la pression quelle que soit la direction dans laquelle cette pression s'exerce. Grâce au matériau isolant qui le compose, en particulier la mousse de polyuréthanne, ce panneau isole de la chaleur et/ou du froid et résiste à l'humidité. Il convient par conséquent pour la construction de coffrages autoportants permanents dans lesquels on peut couler du béton afin de former des parois isolées. L'invention concerne également un procédé permettant la production industrielle en continu de ces panneaux. Dans ce procédé on fabrique les noyaux métalliques des panneaux de coffrage sous forme d'une bande métallique continue. Cette bande métallique formant le noyau est chargée sur un transporteur principal. Simultanément, on prépare un mélange de composants qui réagissent mutuellement pour produire une mousse isolante et on injecte ce mélange en continu à l'entrée du transporteur principal. On comprime ensuite la mousse produite et expansée le long du transporteur principal de manière à former une bande continue constituant le corps principal, présentant une hauteur et une épaisseur données. La bande métallique continue formant le noyau est incorporée dans cet élément principal continu. Pour terminer, on coupe la bande formant le corps principal et la bande métallique du noyau incorporée dans ce corps afin de produire les panneaux désirés.

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