System for making gypsum board using a liquid gypsum set accelerator
AssigneeNational Gypsum Properties, LLC
InventorsGene Whittington, Chris Fewox, Joseph J. Bailey, John L. Phillips
Life of this patent
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Abstract
Systems and methods for making gypsum board using a liquid gypsum set accelerator. Stucco and water are mixed to form a gypsum slurry, such as in a pin mixer. A gypsum set accelerator is mixed with a liquid medium to form a liquid gypsum set accelerator, such as in an eductor. The liquid gypsum set accelerator is added to the gypsum slurry, which is shaped to form the gypsum board.
Claims25
A system for making a gypsum board formed from a gypsum slurry that includes stucco and water, the system comprising:
- an apparatus for making the gypsum slurry, comprising:
- a first mixer for mixing the stucco and water to form the gypsum slurry;
- a canister coupled to the mixer for receiving the gypsum slurry;
- and
- a boot coupled to the canister for discharging the gypsum slurry to form the gypsum board;
- a supply of liquid medium;
- a store of gypsum set accelerator;
- and
- a second mixer coupled to the supply of liquid medium and the store of gypsum set accelerator for mixing the liquid medium and gypsum set accelerator to form a liquid accelerator;
- wherein second mixer is coupled to the apparatus for making the gypsum slurry to introduce the liquid accelerator to the gypsum slurry.
A system for making a gypsum board formed from a gypsum slurry that includes stucco and water, the system comprising:
- an apparatus for making the gypsum slurry, comprising:
- a first mixer for mixing the stucco and water to form the gypsum slurry;
- a canister coupled to the mixer for receiving the gypsum slurry;
- and
- a boot coupled to the canister for discharging the gypsum slurry to form the gypsum board;
- a supply of liquid medium;
- a store of gypsum set accelerator;
- and
- an eductor coupled to the supply of liquid medium and store of gypsum set accelerator, wherein the liquid medium serves as a motive fluid in the eductor to entrain and mix the gypsum set accelerator in the liquid medium to form a liquid accelerator;
- wherein the eductor is coupled to the apparatus for making the gypsum slurry to introduce the liquid accelerator to the gypsum slurry.
A method of making a gypsum board, comprising the steps of:
- providing stucco and water;
- mixing the stucco and water in a first mixer to form a gypsum slurry;
- providing a gypsum set accelerator and a liquid medium;
- mixing the gypsum set accelerator and the liquid medium in a second mixer to form a liquid gypsum set accelerator;
- adding the liquid gypsum set accelerator to the gypsum slurry;
- and
- shaping the gypsum slurry to set to form the gypsum board.
Dependencies are inferred from the claim text.