Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – Means permitting removal or substitution of elements during...
Patent
1994-10-12
1996-07-09
Mackey, James P.
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
Means permitting removal or substitution of elements during...
425193, 425253, 425258, 425412, 425413, 425457, B28B 302, B28B 1302, B28B 2110
Patent
active
055338852
ABSTRACT:
It is desired to simplify the design of an apparatus for manufacturing annular or tubular workpieces from concrete, which comprises a mold having a vertical axis and a mold cavity between a core and a shell. The shell surrounds and is radially spaced from the core, and the mold cavity, is adapted to be filled with concrete from above a feeding and distributing devices is radially guided relative to the mold and serve to feed and distribute the concrete which is to be dispensed into the mold cavity. A mold press, which comprises a vertical ram that carries a mold ring, is adapted to close the mold cavity at its top, and which press is radially displaceable relative to the mold. The feeding and distributing device for the concrete and they the molding press are mounted on a carriage, which is guided to be radially displaceable relative to the mold, and they are arranged on the carriage one behind the other in the direction in which it is displaceable.
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patent: 4708621 (1987-11-01), Schmidgall et al.
patent: 5040968 (1991-08-01), Kraiss
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