Plastic article or earthenware shaping or treating: apparatus – Including means advancing continuous length work through...
Patent
1994-08-30
1996-01-02
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Including means advancing continuous length work through...
26417717, 264178R, 264562, 425 70, 425392, B29C 4790
Patent
active
054802954
ABSTRACT:
A sizing device having a series of sets of sizing dies each composed of first and second die elements for use in extruding articles. Each die element is made of a plate having two opposite faces bounded by a peripheral edge. The edge further defines a notch through the plate. The notch in each die element has an open end extending inwardly to a closed end. The first and second die elements can be moved relative to each other from an open position in which the notches are unoccluded to a closed position in which first and second die elements overlie each other in the direction of extrusion and abut with the notches partly occluded by the abutting complementary die element. When the die is closed, the interior closed ends of the notches of the abutting elements of each die overlap to form a passage through the die that determines the shape of the extrusion. Support structure maintains the series of die sets at spaced apart locations in a vacuum extrusion chamber. A pin through the second die elements allows them to pivot relative to the first die elements so that the entire die assembly can be opened together for easy loading and closed together during extrusion. A stop is positioned to register the complementary die elements when the die assembly is closed to form aligned passages through the series of ganged dies.
REFERENCES:
patent: 4021169 (1977-05-01), Heilmayr et al.
patent: 4090828 (1978-05-01), Renegar
patent: 4401424 (1983-08-01), De Zen
patent: 5139402 (1992-08-01), Topf
Cronvich James T.
Smith Duane S.
The Laitram Corporation
Woo Jay H.
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