Method of fabricating a binder-based board such as plaster or cement binder based board, device for making the same and board producible by this method

摘要

It is described a method of fabricating a binder-based board such as plaster or cement binder based board, comprising steps of mixing a binder composition and water to form the board; depositing the mixture on a moving support, which is driven contiguously by a conveyor belt, said mixture passing trough an extruder subjected to vibrations to form a board; and cut the board obtained to length. The composition also including lightweight aggregates and in that as a consequence of the extrusion under vibration of the composition the lower part of the board has a densified region of small thickness devoid of lightweight aggregates. Also is described a device for making the same, including a mixer (30) for the composition, a moving support on which the mixture is deposited, a conveyor belt (43) for driving the moving support continuously an extruder (33) including a transverse extrusion die (40) to form the board from the mixture, a station (34) for cutting the board to length, and a vibrator (42) adapted to submit the extruder to vibrations. Finally is described a binder-based board such as a plaster or cement based-board obtained by the method, comprising a mixture of a binder such as a plaster or cement based boar, lightweight aggregates and water, in that lower part of the body of the board has a densified region of a small thickness devoid of lightweight aggregates; and use of the board wherein the binder is a cementitious binder to form or cover the walls, floors or roofs, inside or outside of buildings such as industrial kitchens, the laboratories, food, showers, bathrooms, pools or pools, and / or rooms frequently washed by water jet, such as farm buildings or rooms of industrial butchers.