Patent ID: 11964900
Assignee: SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 17:
18. Method for production of a fused tuckstone according to claim 1, the method comprising the following successive steps:
a) mixing of raw materials so as to form a starting batch;
b) fusion of said starting batch to obtain a bath of molten material;
c) casting of said molten material in a mold, and solidification of said molten material by cooling so as to obtain an intermediate piece which has a form of a tuckstone, the surface of said intermediate piece which is in contact with the mold having a crystal density of more than four times the crystal density at a depth of 4 centimeters below said surface;
d) removal of said intermediate piece from the mold; and
e) partial machining of the outer surface of the intermediate piece to obtain said fused tuckstone.