Core for molding hollow concrete blocks

Details Core for molding hollow concrete blocks Core for molding hollow concrete blocks

1987-09-03

1988-12-27

Chiesa, Richard L.

Static molds

Mold including core and means to remove core

249 64, 249135, 249177, 249 661, B28B 738

Patent

active

047935871

ABSTRACT:
A hollow core for a concrete block is cast from an abrasion resistant alloy steel known in the trade as #8620. The core is generally rectangular in cross section and includes a top wall and depending side walls. The side walls are ground to a mirror-finish and the fine tooling grooves formed when the side walls are ground are all parallel to each other and transverse to the top wall of the core. This greatly lessens the frictional resistance between the core and the cement greatly increasing the useful life of the core in comparison the cores previously constructed.

REFERENCES:
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patent: 3442991 (1969-05-01), Lanz
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patent: 4478779 (1984-10-01), Russell et al.
patent: 4653996 (1987-03-01), Ozaki et al.

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