B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
B28B 1/32 (2006.01) B28B 1/52 (2006.01) C04B 11/024 (2006.01) C04B 20/02 (2006.01) C04B 40/00 (2006.01)
Patent
CA 2308552
An improved method and apparatus for imparting a smooth surface to gypsum fiber panels. The method involves imparting energy to the surface of a slurry as the slurry is dewatered just prior to rehydration. The apparatus used to impart the energy is a fluid spray including a source of pressurized fluid such as a pump or blower, a distribution manifold and a plurality of nozzles to direct the fluid spray at the surface of the slurry. In operation, the fluid spray is directed against the surface of the slurry. The flow disrupts the slurry to a fraction of its total depth, thus dispersing clumps or flocs of commingled crystals and fibers in the depth that would give the surface of the finished panel a rough surface if they were allowed to remain.
Méthode et appareil améliorés pour obtenir une surface lisse sur les panneaux de gypse renforcés de fibres. La méthode comprend la transmission d'énergie à la surface d'une barbotine pendant que celle-ci est déshydratée juste avant sa réhydratation. L'appareil utilisé pour transmettre l'énergie est un pulvérisateur de fluide qui comprend une source de fluide sous pression, comme une pompe ou une soufflante, un distributeur ainsi que plusieurs buses pour orienter le pulvérisateur de fluide vers la surface de la barbotine. Lorsqu'il est en fonction, le pulvérisateur de fluide est dirigé vers la surface de la barbotine. Le jet perturbe la barbotine sur une fraction de sa profondeur totale, ce qui disperse vers le fond les flocons de cristaux et de fibres agglutinés qui confèreraient au panneau fini une surface rugueuse s'ils y demeuraient.
Miller David Paul
Song Weixin David
Company United States Gypsum
Gowling Lafleur Henderson Llp
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