Plastic article or earthenware shaping or treating: apparatus – With safety feature
Patent
1998-07-09
2000-08-22
Mackey, James P.
Plastic article or earthenware shaping or treating: apparatus
With safety feature
425338, 4254517, 425588, 425589, B29C 4566, B29C 4584
Patent
active
061062650
ABSTRACT:
A molding apparatus comprises a first mold plate positioned between a pair of second mold plates for opening and closing pairs of mold halves. The mold plates carry leader pins which are connected with each other in both the open and the closed position of the molding apparatus, for lateral support of the central first mold plate. Also or alternatively, a mold plate centering system is provided, comprising threaded rods carried by the first, central mold plate and pointing toward the second plates. Internally threaded sleeves are carried by the second plates, with at least a portion of each threaded rod occupying at least a portion of the bore of the internally threaded sleeve and screw threaded relation. Specifically, the threaded rods are joined together and freely rotatable, with the result that the position of the first, central plate is controlled as the respective plates are opened and closed by a moving platen of an injection mold. By this invention, a second sleeve prevents exposure of the threaded rods, to avoid accident and jamming of the system with debris.
REFERENCES:
patent: 3669599 (1972-06-01), Snider et al.
patent: 3857440 (1974-12-01), Ruegg
patent: 3905741 (1975-09-01), Poncet
patent: 3986805 (1976-10-01), Haines
patent: 4408981 (1983-10-01), Brown
patent: 4718845 (1988-01-01), Sheffield et al.
patent: 5578333 (1996-11-01), Schad et al.
Bulletin dated Jun., 1996 entitled: "National . . . The New Work Standard Runnerless Stack Mold Base". Sold by the Plas-Tool Co. of Niles, Illinois (4 pages).
Portion of p. 71 of an unknown magazine comprising an advertisement entitled: "Enhance Productivity . . . Over 20 million continuous cycles and still going strong!" (undated).
One sheet portion of an unknown publication, probably a catalog of the HASCO Company of Germany, date unknown.
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