Title:
STRAIGHT-ACTING MOLD CLAMPING DEVICE OF AN INJECTION MOLDING MACHINE
Document Type and Number:
WIPO Patent Application WO/1988/000520
Kind Code:
A1
Abstract:
A straight-acting mold clamping device of an injection molding machine driven by two motors, which effects mold closure or opening at a high speed and which produces a required mold clamping force without using any large-capacity motor. The mold clamping device has a ball screw (6) that screws into a ball nut (7) which moves together with a movable platen (1) as a unitary structure. The ball screw is coupled to a servo motor (10) via transmission mechanisms (8, 9, 11, 17), and is further coupled to an induction motor (12) via a transmission mechanism, a reduction gear (14) and a clutch (15). There is further provided a numerical controller (20) which controls the servo motor, the induction motor and the clutch. The moving platen that is driven by the servo motor reaches a mold touch position at a high speed, and is then driven with a large force by both the servo motor and the induction motor until it reaches a position where a predetermined force is generated to clamp the mold. Further, at a moment when the moving platen has reached the position where the predetermined mold clamping fforce is generated, the induction motor is controlled by a brake device (13), whereby the moving platen is locked at that position to generate a predetermined clamping force.
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Inventors:
INABA YOSHIHARU (JP)
MITOGUCHI FUMIO (JP)
KAMIGUCHI MASAO (JP)
TOKUNAGA SHIGEO (JP)
MITOGUCHI FUMIO (JP)
KAMIGUCHI MASAO (JP)
TOKUNAGA SHIGEO (JP)
Application Number:
PCT/JP1987/000525
Publication Date:
January 28, 1988
Filing Date:
July 17, 1987
Export Citation:
Assignee:
FANUC LTD (JP)
International Classes:
B29C45/66; B29C45/76; B29C45/80; (IPC1-7): B29C45/80; B29C45/66
Foreign References:
| JPH05113495B | ||||
| JPH0649853A | 1994-02-22 | |||
| JPH04719344B | ||||
| JPS431511B1 |
Other References:
See also references of EP 0277242A4
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