Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Mold motion or position control
Reexamination Certificate
2005-04-26
2005-04-26
Mackey, James P. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Mold motion or position control
C425S589000, C425S590000
Reexamination Certificate
active
06884057
ABSTRACT:
An electromechanical clamping device with hydraulic assistance. A thrust mechanism driven by an electric motor displaces two clamping jaws with respect to each other along a guide device. One clamping jaw is divided into two mutually displaceable part java. A chamber to hold pressure medium is formed between the part jaws. The first part jaw can be displaced along the guide device and locked with respect to the latter. One part jaw is provided with a first cylinder coupled to the output of the thrust mechanism. In order to close the clamping device, in a first step the thrust mechanism pulls the part jaws against the other clamping jaw, and in a second step the thrust mechanism delivers pressure medium from the first cylinder into the chamber between the two part jaws, with the first part jaw locked with respect to the guide device. To open the clamping device, in a first step a second cylinder arranged between the two part jaws pulls the part jaws against each other, with the first part jaw locked with respect to the guide device, and then in a second step the thrust mechanism forces the part jaw coupled to it in the opening direction, forcing the other part jaw with it, with the first part jaw unlocked from the guide device. The clamping device is provided for production machines, in particular for injection molding machines.
REFERENCES:
patent: 3611502 (1971-10-01), Florjancic
patent: 3704973 (1972-12-01), Renfrew et al.
patent: 5129806 (1992-07-01), Hehl
patent: 6439875 (2002-08-01), Morita et al.
patent: 4344340 (1995-06-01), None
patent: 9211993 (1992-07-01), None
patent: 0189801 (2001-11-01), None
Publication “Grundlagen und Komponenten der Fluidtechnik—Der Hydraulik Trainer. Band 1” (Principles and Components of Fluid Technology—the Hydraulic Trainer, vol. 1) from Mannesmann Rexroth GmbH, RD 00290/10.91 (second edition), 1991, pp. 124-125.
Bosch Rexroth AG
Farber Martin A.
Mackey James P.
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