Method and apparatus for casting a hollow-core concrete product
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United States of America Patent
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Issued Date -
Aug 11, 2005
app pub date -
Nov 10, 2004
filing date -
Jun 7, 2002
priority date (Note) -
Abandoned
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Abstract
A method and apparatus are disclosed for casting prestressed hollow-core concrete products, in which method concrete mix is fed onto a casting bed with the help of feeder augers having a diameter smaller than the height of the hollow-core cavities being formed. The invention is characterized by having the concrete mix flowed along slanted leading-end surfaces of the core-forming mandrels so as to form cavities larger than the cross section of the feeder augers.
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