Plastic and nonmetallic article shaping or treating: processes – Treatment of material by vibrating – jarring – or agitating... – By reciprocating or vibrating mold
Patent
1976-05-24
1978-11-21
Pavelko, Thomas P.
Plastic and nonmetallic article shaping or treating: processes
Treatment of material by vibrating, jarring, or agitating...
By reciprocating or vibrating mold
264310, 264333, 264336, B28B 108
Patent
active
041266552
ABSTRACT:
A method and mould for manufacturing concrete elements by means of a turnable mould, whereby the concrete is cast in a main mould when the latter is in horizontal position while the mould is at the same time vibrated. The mould has a closed construction and is used in such a way that, at the casting stage, the second half of the mould construction, which is hinged in relation to the main mold, is in vertical position. Thereafter the mould construction is closed which causes a pressure on the concrete, whereby any excess concrete is extruded through the slit between the mould halves. Then the entire mould construction is turned into vertical position while continuing the vibration so as to eliminate any air that has moved to the outer surfaces of the element. The mould construction is turned further by 90.degree. so that said second half of the mould, which comprises a frame and an auxiliary mould fastened inside the frame, remains underneath. Finally the main mould is lifted into vertical position and the auxiliary mould is detached from the frame so as to shift the element away.
REFERENCES:
patent: 2655710 (1953-10-01), Roensch
patent: 3492384 (1970-01-01), Matthews
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