Closing unit for use in an injection molding machine for processing plastic material
AssigneeMannesmann Plastics Machinery GmbH
InventorsKlaus Becker, Rüdiger Ostholt
Life of this patent
Estimating the term…
Abstract
A closing unit for an injection molding machine for processing plastic material includes a fixed mold mounting plate connected to a moveable mold mounting plate by means of a crank or toggle lever mechanism, which is operated by at least two motor-driven spindles arranged in series and having thread pitches in an opposite manner. One spindle is operatively connected to the fixed mounting plate, whereas the other spindle is connected to the crank or toggle lever mechanism. A sleeve-like force transmission element is arranged concentrically in relation to the spindles. Spindle nuts are respectively provided on opposite end faces of the force transmission element and interact with the power transmission element and the spindles.
Claims19
A closing unit for use with an injection molding unit for processing plastic material, comprising:
- a fixed mold mounting plate;
- a moveable mold mounting plate;
- a linkage for connecting the moveable mounting plate to the fixed mounting plate;
- at least two spindles arranged in series and having thread pitches configured in opposite manner, one spindle operatively connected to the fixed mounting plate, and with the other spindle connected to the linkage;
- a drive mechanism for moving the moveable mounting plate relative to the fixed mounting plate, said drive mechanism including a sleeve-like force transmission element, which is arranged in concentric surrounding relationship to the spindles and has opposite end faces, and a first electric motor, which is operatively connected to the force transmission element;
- and
- at least two spindle nuts, one spindle nut arranged at one of the end faces of the force transmission element and interacting with the force transmission element and one of the spindles, and the other spindle nut arranged at the other end face of the force transmission element and interacting with the force transmission element and the other one of the spindles.
Dependencies are inferred from the claim text.