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AssigneeStamicarbon B.V.
InventorsJan M. J. M. Bijen, Johann J. Jansen
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The present invention relates to a continuous process for manufacturing articles comprised of fiber-reinforced hydraulically bound material. A layer of the fiber-reinforcing and hydraulically bindable materials are placed on a first endless carrier while a second similar layer is formed on a second endless carrier. The layer formed on the second carrier is deposited on the layer formed on the first carrier by reversing the second carrier and the composite layer formed as a result is thereafter given the desired shape and is hardened. A number of fibrous network structures are used with the hydraulically bindable material and the two are formed into a layer with the networks distributed in it. Water is removed from that layer by suction, while on the second carrier a number of fibrous networks are likewise supplied to be formed into a layer comprised of the hydraulically bindable material with the networks distributed in it and water is also removed by suction from this layer. The invention is applied in the manufacture of building materials used, for instance, to replace asbestos-cement sheets.
A process for manufacturing articles comprised of fiber-reinforced, hydraulically bound materials comprising the steps of forming a first layer by incorporating a hydraulically bindable material into a plurality of continuous plastic networks on a first conveyer, said continuous plastic networks being comprised of a composition of coherent fibers or filaments, stretched and fibrillated plastic films or perforated sheets of films, continuously forming a second layer by incorporating, a hydraulically bindable material into a plurality of continuous plastic networks on a second conveyor, removing a predetermined quantity of water from each layer and subsequently forming a composite layer structure by depositing the layer formed on one of the conveyors onto the layer formed on the other conveyor so that the one deposited is turned upside down and finishing the article.
Apparatus for forming a composite layer structure comprised of network-reinforced hydraulically bindable material said apparatus including first and second conveyor systems, said second conveyor system being mounted above the other with the two systems having material receiving areas that move in opposite directions, first and second network-reinforcing feed stations for respectively feeding network-reinforcing material onto the first and second conveyor systems, first and second hydraulically bindable material feed stations, located respectively adjacent said first and second network-reinforcing feed stations, for respectively feeding hydraulically bindable material onto said first and second conveyor systems, means for reversing the direction of travel of said second means for reversing conveyor system so that the material thereon will be brought into contact with the material on said first conveyor system, compaction means for compacting the contacting layers and suction means, located downstream from each of said first and second hydraulically bindable material feed stations, for removing liquid from the material deposited on each conveyor system.
Dependencies are inferred from the claim text.