Metal founding – Means to shape metallic material – Pressure shaping means
Patent
1984-03-13
1986-07-22
Husar, Francis S.
Metal founding
Means to shape metallic material
Pressure shaping means
164418, 295276, 295271, 29DIG26, B22C 1308
Patent
active
046013229
ABSTRACT:
A pipe mold for centrifugally casting pipe is disclosed. The pipe mold according to the present invention is made by depositing weld material on a rigid shell. The rigid shell is obtained by forming a flat plate into a cylinder and welding the resultant seam. Additional rigid shells can be circumferentially welded together to obtain a desired length. The welded seams are areas of weakness called metallurgical notches. To eliminate the metallurgical notches, weld material is deposited on the shell. In one embodiment, weld material is deposited on the outside of the shell. The shell then is machined away. The resultant pipe mold has a total wall thickness comprising weld material and is free of metallurgical notches. In addition, the need for furnace heat-treatment to achieve properties in the weld material can be eliminated.
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Griffin Jorji M.
Husar Francis S.
Kennard Wayne M.
National Forge Company
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