Patent ID: 6120713
Filing Date: 2000-09-19
Classification: B22C

Abstract:
A method of making a ceramic mould for the casting of an article, which comprises:a) providing a wax-based pattern of the article to be cast;b) forming a contact layer on said pattern;c) providing a preparation mould for defining an outer shape of the casting mould to be made;d) placing the pattern having the contact layer thereon in said preparation mould to define a cavity between said pattern and said preparation mould;e) introducing into said cavity a ceramic slip having a composition which expands and fills said cavity and adheres to the contact layer on said pattern;f) removing the pattern and adhered ceramic slip from the preparation mould after from about 5 to 30 minutes;g) eliminating the wax-based pattern to leave a casting mould formed by the contact layer and adhered ceramic slip; andh) firing said casting mould to strengthen said mould by sintering.