Patent ID: 7780885

Claim:
A high pressure casting method in a machine for producing an article of sanitaryware using a ceramic mixture or slip, the machine being equipped with at least one mould comprising at least two parts, the method comprising in sequence the steps of: closing the mould; filling the mould with slip; first thickness formation of the sanitaryware article by increasing the pressure in the mould; second thickness formation of the sanitaryware article by providing pressure in the mould effective to force water in the slip out through the mould; emptying non-solidified excess slip out of the mould; after the emptying step, consolidating the sanitaryware article in the mould by providing pressure in the mould greater than atmospheric pressure for a time sufficient to effectively complete consolidation of the sanitaryware article; decompressing the mould until the pressure in the mould is substantially equal to atmospheric pressure; opening the mould; and demoulding the sanitaryware article thus formed, wherein pressure in the mould is not increased after the second thickness formation step and up through the consolidating step.