Plastic article or earthenware shaping or treating: apparatus – With factory structure feature
Patent
1974-02-25
1976-06-15
Annear, R. Spencer
Plastic article or earthenware shaping or treating: apparatus
With factory structure feature
264 464, 425441, 425451, 425454, 425817R, B29D 2700
Patent
active
039633950
ABSTRACT:
An improved mass production assembly line is provided for fabricating building walls and similar structural members in molds by applying a hardenable polyester film to the cavity surfaces of mold halves, joining the mold halves and then introducing a mixture into the mold cavity to form a polyurethane foam.
First and second rectangular fields of rollers, each mounted on a pedestal, are adapted to carry respective mating halves of each mold in a horizontal plane from a start end of the fields to the terminating end. The mold cavities face upwardly. The lower surface of each mold half has secured thereto elongated T-shaped bars. The bars are parallel with each other, and each bar is adapted to be carried by one line of rollers in a respective one of the fields. The parallel axes of the rollers are set to an exact height by means of a laser light source and photoresponsive means so that the upper edges of the rollers lie in the same horizontal plane. The bars of each mold half have flat smooth lower edges lying in the same plane so that they support the large (eg 12 feet .times. 20 feet), thin-walled molds with minimum distortion. Minimum force is required of the workers for manually moving each mold along the field length or stopping it at work stations positioned along the field. A transfer mechanism at the terminating end of the fields receives each pair of mold halves on horizontal arms thereof. The arms include rows of rollers for receiving and suppoting the T-shaped bars and are pivotally mounted at their adjcent edges. The transfer mechanism moves the mold halves to a position adjacent to a foaming station; and the arms are pivoted to juxtaposed vertial positions to bring the mold halves together. The mold halves are secured to each other; and in this vertical position they are carried on an additional row of rollers on the transfer mechanism. The joined mold halves are manually moved over the latter rollers from the transfer mechanism to a row of supporting rollers on the floor of the foaming station. Rollers mounted on vertical axes in opposed vertical planes on either side of the floor roller support the mold halves for easy manual movement without falling over and prevent bulging of the mold halves due to high foaming pressures. Foam is applied to the cavity in the mold halves via an opening in the upper surface thereof. After the cavity is filled and the foaming action is completed, the mold halves are moved along the assembly line to a subsequent station where the mold halves are separated to remove the fabriated wall. An overhead crane is preferably used to pick up the mold halves at the foaming station and move them to the mold separation station.
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patent: 2990929 (1961-07-01), Attwood
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patent: 3233285 (1966-02-01), Ludwig
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patent: 3778018 (1973-12-01), Abalo
patent: 3813463 (1974-05-01), Conger
Annear R. Spencer
Automated Construction Industries, Inc.
Clark Ronald J.
Rosenbaum Mark
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