Article trimming apparatus

Details Article trimming apparatus Article trimming apparatus

1975-10-24

1976-09-07

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Preform severing means

Cutter guided by or cooperating with peripheral edge of...

7245314, 83552, 4254519, B29C 300, B29C 1708

Patent

active

039791742

ABSTRACT:
A modification to an apparatus for trimming thermoplastic material surrounding the bordering edge of an article formed in a die or mold from a sheet of pliable thermoplastic material such as glass arranged over the die or mold which is supported by a mold or die carrier, such apparatus including a trimmer having a lower cutting edge and disposed above the die with the center of the trimmer in vertical axial alignment with the center of the die and cooperative with a trimming edge of the die when the trimmer is lowered for trimming of the article formed in the die. A pressurized hydraulic fluid cylinder vertically actuates the trimmer. The modification comprises apparatus for assuring horizontal alignment of the cutting and trimming edges when trimming operations are performed thereby and such apparatus includes a pair of anvils which are supported by a pair of support arms which also support said cylinder and associated apparatus, a pair of hydraulic fluid cylinders which actuate the support arms upwardly and the anvils into contact with the die carrier, and a pair of hydraulic fluid pressure intensifiers or intensification devices, hydraulic fluid conduits, pressure relief valves and a pressure accumulator providing a hydraulic pressurized fluid intensification system for intensifying the pressure of the hydraulic fluid supplied to the pair of hydraulic fluid cylinders when the piston of the first mentioned cylinder moves downwardly and actuates the pressure intensifiers or intensification devices.

REFERENCES:
patent: 1970134 (1934-08-01), Ferris
patent: 3145824 (1964-08-01), Giffin
patent: 3596499 (1971-08-01), Sauerbrey
patent: 3707866 (1973-01-01), Brauer
patent: 3918871 (1975-11-01), Anderson

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