Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means between charger and mold to cut off flow of...
Patent
1980-11-14
1982-02-16
Pavelko, Thomas
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means between charger and mold to cut off flow of...
4254519, 425595, B29F 103
Patent
active
043157270
ABSTRACT:
A mechanism for locking together two mold sections includes one or more lock elements rotatably mounted on one of the mold sections, and a respective cylindrical tie rod for each lock element mounted on the other mold section. Each lock element has a cylindrical opening therethrough along its axis of rotation, and a plurality of lock balls disposed in recesses in the surface of the opening so as to form radially inwardly extending hemispherical projections on said surface. Each tie rod is of a diameter slightly less than that of the corresponding cylindrical opening in the lock element, such that the tie rod is axially slidably receivable within the opening. The surface of each tie rod has a plurality of longitudinal guide grooves radially aligned with the lock balls in the surface of the opening, and each lock ball is slidingly received in a guide groove when the tire rod is slidably disposed in the opening. Intersecting each guide groove at substantially a right angle is a lock groove. When the mold sections are in a closed position, each lock ball will be disposed at such an intersection, whereby rotation of the lock element relative to the tie rod will cause each lock ball to enter a lock groove, preventing relative axial movement of the tie rod relative to the lock element and effecting a secure clamping engagement of the mold sections in the closed position.
REFERENCES:
patent: 2879545 (1959-03-01), Bailey
patent: 2916768 (1959-12-01), Quene
patent: 3611499 (1971-10-01), Getty
patent: 3986804 (1976-10-01), Albright
patent: 3986805 (1976-10-01), Haines
Pavelko Thomas
Pemco-Kalamazoo, Inc.
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