Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Of inorganic materials
Patent
1995-03-14
2000-09-19
Fiorilla, Christopher A.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Of inorganic materials
264635, 264636, 264221, B29C 6500
Patent
active
061207136
ABSTRACT:
A method of making a ceramic casting mould contains forming a contact layer on a disposable wax-type pattern of the article to be cast, placing the pattern in a preparation mould for defining the outer shape of the casting mould and filling the cavity formed between the pattern and the preparation mould with a ceramic slip which expands to form a coherent cellular foam adhering to the surface of the pattern, removing the pattern and adhered foam from the preparation mould after from 5 to 30 minutes, eliminating the pattern to leave a casting mould formed by the contact layer and the adhered foam, and then firing the casting mould to strengthen said mould. Ceramic slip compositions are also described.
REFERENCES:
patent: 4158685 (1979-06-01), Masaryk
patent: 4356271 (1982-10-01), Francis et al.
patent: 4575439 (1986-03-01), Hintzen et al.
patent: 4844148 (1989-07-01), Cuisin et al.
patent: 5422055 (1995-06-01), Yalvac et al.
Cuisin Thierry Andre
Poirier Vincent Raymond Jacques
Fiorilla Christopher A.
Societe Nationale d'Etude et de Construction de Moteurs d'Aviati
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