Formation of foundry core blocks
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United States of America Patent
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-
Feb 5, 1991
Issued Date -
N/A
app pub date -
Mar 28, 1990
filing date -
Oct 22, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Though holes are provided in a suitable area of the cores during the formation thereof in a first blowing machine, such that, on adjoining the cores, to form the block, and in the absence of additives between the contacting surfaces thereof, the through holes are placed one adjacent another. Then a housing is defined, which affects the entire block in a longitudinal direction, and which subsequently molds a mixture of sand and a binder material, similar to a core in a second blowing machine. The material after hardening, acts as a coupling and stiffening arrangement between the cores forming the block.
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