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Machine translation
1. (WO1981000375) METHOD AND APPARATUS FOR THE PRODUCTION OF COMPOSITE SHEET MATERIAL AND A SHEET MATERIAL PRODUCED THEREBY
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/000375    International Application No.:    PCT/GB1980/000125
Publication Date: 19.02.1981 International Filing Date: 07.08.1980
IPC:
B28B 1/16 (2006.01), B28B 1/52 (2006.01), B28B 5/02 (2006.01)
Applicants:
Inventors:
Priority Data:
7927723 09.08.1979 GB
Title (EN) METHOD AND APPARATUS FOR THE PRODUCTION OF COMPOSITE SHEET MATERIAL AND A SHEET MATERIAL PRODUCED THEREBY
(FR) PROCEDE ET APPAREIL DE PRODUCTION DE MATERIAU EN FEUILLE COMPOSITE
Abstract: front page image
(EN)A method and apparatus for the production of a composite sheet material and a material produced thereby are described, a typical product being a lightweight permanent or temporary form work sheet of accurate thickness and parallelism made from material including glass fibre reinforced cement. A base (10) or mould is moved through successive stations (13, 14, 15) at which uncured but curable material is deposited in layers (16, 18, 23) thereon. A t least the final layer (23) is consolidated by a local surface treatment with a vibratory screeder (17, 19, 24), the influence of which spreads through the material to promote intimate bonding together of the uncured layers (16, 18, 23). In a preferred form, the material comprises three layers (16, 18, 23), the first (16) and third (23) being of glass fibre reinforced cement and the central second layer (18) being of cementitious material including a lightweight aggregate such as hollow microspheres. The screeder (17, 19, 24) used on the top surface is accurately guided with respect to the base (10) or mould to provide an accurately controlled relationship between the faces of the finished sheet.
(FR)Procede et appareil de production d'un materiau en feuille composite et un materiau produit a l'aide de ce procede, un produit caracteristique consistant en une feuille de coffrage leger permanent ou temporaire ayant une epaisseur et un parallelisme precis, fabriquee a partir d'un materiau comprenant du ciment renforce avec des fibres de verre. Une base (10) ou moule passe par plusieurs stations successives (13, 14, 15) ou un materiau non polymerise mais polymerisable est depose en couches (16, 18, 23) sur cette base ou moule. Au moins la couche finale (23) est consolidee par un traitement de surface local avec une latte de reglage vibratoire (17, 19, 24), dont l'influence se propage au travers du materiau pour favoriser la liaison intime des couches non polymerisees (16, 18, 23). Dans une forme preferee, le materiau comprend trois couches (16, 18, 23), la premiere (16) et la troisieme(23) etant du ciment renforce avec des fibres de verre et la seconde couche centrale (18) consistant en un materiau de ciment comprenant un agregat leger tel que des microspheres creuses. La latte de reglage (17, 19, 24) utilisee sur la surface est guidee de maniere precise par rapport a la base (10) ou moule pour obtenir une relation precise entre les faces de la feuille finie.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)