Plastic article or earthenware shaping or treating: apparatus – Mold opening and closing means and segmented female mold – Articulated link
Patent
1977-03-01
1978-05-09
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Mold opening and closing means and segmented female mold
Articulated link
425150, 425593, B29F 100, B30B 116, B29C 306
Patent
active
040884325
ABSTRACT:
An injection molding machine has two stationary platens interconnected by tie bars and an immediate third platen which is movable on the tie bars. Separable mold portions are mounted respectively on one of the stationary platens and the third platen so that reciprocating movement of the third platen along the tie bars opens and closes the mold portions. A pair of toggle linkage mechanisms positioned at opposite sides of the machine and connecting with the movable third platen and one of the other platens are used to lockup the mold portions when the linkages assume their toggle positions. To move the toggle mechanisms into the toggle positions, a crosshead on slide rods connects with the mechanisms and is pushed away from the third platen at lockup by two piston and cylinder assemblies extending between the platen and the crosshead. The positioning of the cylinders and crosshead minimizes the overall length of the molding machine and permits mold lockup to be triggered more accurately.
REFERENCES:
patent: 2498264 (1950-02-01), Goldhard
patent: 3452399 (1969-07-01), Blumer
patent: 3632272 (1972-01-01), Herbener
patent: 3667890 (1972-06-01), Rusmini
Flint, Jr. J. Howard
Package Machinery Company
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