Method for the production of slabs of ceramic material
OwnerMarcello Toncelliinventor
Life of this patent
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Abstract
In an improved method for the production of slabs of ceramic material the starting mixture is enclosed between two sheets of cardboard or paperboard, subjected to vibrating compression under vacuum. The aboard or paperboard being thick enough to absorb the excess mixture water prior to the transfer to the subsequent drying and firing stages, said sheets of paperboard being removed before said drying stage, so that the rough-formed slab is dried resting solely on a porous fabric or felt, and baking is performed while keeping the dried rough-formed slab in contact with the oven surface solely by means of a temporary protective layer of refractory material (engobe).
Claims5
A method for the production of a slab of ceramic material, comprising the stages of:
- (i) providing a temporary support layer and arranging on top of said temporary support layer a first sheet of cardboard or paperboard
- (ii) depositing in a metered quantity a mixture of a granulated material and a water-based binder on a said first sheet of cardboard or paperboard made with a porous material,
- (iii) applying a vibrating compression under vacuum to the mixture so as to obtain a “virgin” slab,
- (iv) drying the “virgin” slab while it is deposited on a second support made with a porous material so as to obtain a dried slab,
- (v) depositing the dried slab on a protective layer of refractory material,
- (vi) firing the dried slab while the slab is deposited onto said protective layer,
- wherein a second sheet of cardboard of paperboard is applied onto the mixture layer prior to the stage (iii) of vibrating compression under vacuum so as to have the mixture layer enclosed between two sheets of cardboard or paperboard of sufficient thickness for absorbing the excess mixture water, and
- wherein said first and second sheets of cardboard or paperboard are removed prior to said drying stage (iv).
Dependencies are inferred from the claim text.