Method for manufacturing shaped bodies from gypsum, water, fibers and light aggregate particles
AssigneeBison-werke Bahre & Greten GmbH & Co. KG
InventorHans G. Bucking
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Abstract
A method of manufacturing shaped bodies, in particular boards, out of gypsum, water of hydration and comminuted fibers containing lignocellulose and/or cellulose is described in which all components are combined into a single starting mixture and at least one water saturated, essentially ground-moist, light aggregate is dispersed in this mixture as a fixed pore former. From this starting mixture there is formed a mat which is built up symmetrically in cross-section by means of a single double-sided wind sifting scattering process wherein the light aggregates are located in the central layer. This mat which is built up symmetrically in cross-section is pressed while supplying heat.
Claims17
A method of manufacturing shaped bodies comprising the steps of:
- a) forming a starting mixture from gypsum in a dry state, light aggregate particles having pores which are saturated with water, and comminuted fibers;
- b) blowing air on a portion of the starting mixture in a first direction and blowing air on another portion of the starting mixture in a second direction, which is opposite to the first direction, to form a mat of symmetrical cross section having two outer layers and a center layer which continuously merge into one another, wherein said center layer comprises the light aggregate particles, part of the gypsum, and part of the comminuted fibers, and said outer layers are free of light aggregate particles;
- and
- c) pressing the mat into a shaped body at an elevated temperature, wherein the shaped body has smooth, dense surfaces of high strength.
A method of manufacturing shaped bodies comprising the steps of:
- a) forming a starting mixture from gypsum in a dry state, light aggregate particles having pores which are saturated with water, and comminuted fibers;
- b) transporting a single flow of the starting mixture to a scattering apparatus, blowing air on a portion of the starting mixture with the scattering apparatus in a first direction and blowing air on another portion of the starting mixture with the scattering apparatus in a second direction, which is opposite to the first direction, to form a mat of symmetrical cross section having two outer layers and a center layer which continuously merge into one another, wherein said center layer comprises the light aggregate particles, part of the gypsum, and part of the comminuted fibers, and said outer layers are free of light aggregate particles;
- and
- c) pressing the mat into a shaped body at an elevated temperature, wherein said shaped body has dense, smooth surfaces.
A method of manufacturing shaped bodies out of gypsum, water of hydration for the gypsum, comminuted fibers, and light aggregate particles, the method comprising the steps of:
- a) forming a starting mixture from gypsum in a dry state, light aggregate particles having pores which are saturated with water, and comminuted fibers;
- b) transporting a single flow of the starting mixture to a scattering apparatus, blowing air on a portion of the starting mixture with the scattering apparatus in a first direction and blowing air on another portion of the starting mixture with the scattering apparatus in a second direction, which is opposite to the first direction, to form a mat of symmetrical cross section having two outer layers and a center layer which continuously merge into one another, wherein said center layer comprises the light aggregate particles, part of the gypsum, and part of the comminuted fibers, and said outer layers are free of light aggregate particles;
- and
- c) pressing said mat into a shaped body at an elevated temperature.
Dependencies are inferred from the claim text.