METHOD AND APPARATUS FOR CASTING A HOLLOW-CORE CONCRETE PRODUCT

摘要

A method and apparatus are disclosed for casting prestressed hollow-core concrete products, in which method concrete mix is fed onto a casting bed wi th 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-formi ng mandrels so as to form cavities larger than the cross section of the feeder augers.