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US 6,843,461 B2Granted
Mold for producing depressions in the sides of a molded block
AssigneeKOBRA Formen-und Anlagenbau GmbH
InventorsRudolf Braungardt, Erwin Schmucker
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AssigneeKOBRA Formen-und Anlagenbau GmbH
InventorsRudolf Braungardt, Erwin Schmucker
Estimating the term…
The side walls of a mold have recesses in each of which is mounted a mold core for forming depressions on the outer side of a concrete block which is to be produced in this mold. The mold cores are pivotally supported around a horizontal axis which is parallel to the mold walls on the outer side of the mold. A sloping cam slot on each mold core is used to pivot the mold cores into the mold cavity defined by the mold walls and then back into the recess. The inner edges of a recess closely fit the mold core and function as strippers which self-clean all surfaces of the mold core which have come into contact with the concrete when the mold core is pivoted back into its recess. As a result, time intervals for cleaning the mold cores are greatly lengthened and a clean and smooth surface of the finished concrete block is insured.
A mold for producing a molded article from concrete or a like material comprising side walls defining at least one mold cavity therein, there being one or more recesses in said side walls, one or more mold cores and each pivotally supported within a said recess, means, on said mold for pivoting said mold cores into a first position to project into the mold cavity to form depressions in the side walls of a concrete block produced therein and into a second position back into said recesses and said means for pivoting having a pivot axis at least partially contained within said recess.
Dependencies are inferred from the claim text.