Apparatus and method for constructing building boards using low friction surfaces
AssigneeSaint-Gobain Placo
InventorsRobert J. Hauber, Gerald D. Boydston, Nathan Gregory Frailey, Michael P. Fahey, Bryan J. Wiltzius, John M. Bridenstine
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Abstract
A method for producing building boards includes unwinding a facing sheet from a supply roll of facing sheet over top of a forming table that includes a series of nozzles. A volume of cementitious material is deposited from a slurry mixing device to the unwound facing sheet. Pressurized air is supplied from an air source to the series of nozzles, whereby a cushion of air is created between the unwound facing sheet and the forming table.
Claims16
A method for producing building boards, the method comprising:
- unwinding a facing sheet from a supply roll of facing sheet over top of a forming table that includes a series of nozzles;
- depositing a volume of cementitious material from a slurry mixing device to the unwound facing sheet;
- and
- supplying pressurized air from an air source to the series of nozzles, whereby a cushion of air is created between the unwound facing sheet and the forming table, wherein the air source supplies pressurized air in bursts at a set frequency.
A method of making a building board, the method comprising:
- unwinding a supply roll of bottom facing sheet material made of paper or a fibrous mat onto an upper surface of a forming table, the upper surface having a plurality of nozzles formed therein;
- depositing a gypsum slurry onto the bottom facing sheet material on the forming table;
- and
- supplying pressurized air to the plurality of nozzles through a plenum in fluid communication with the plurality of nozzles, wherein the pressurized air creates a cushion of air between the upper surface of the forming table and the bottom facing sheet material on the forming table, wherein the plenum receives the pressurized air from an air source, and wherein the air source supplies pressurized air in bursts at a set frequency so as to vibrate the deposited gypsum slurry via the pressurized air bursts.
Dependencies are inferred from the claim text.