Actuating device for shut-off needles in injection molding...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 45/28 (2006.01)

Patent

CA 2636718

The invention relates to an actuating device (10) for shut-off needles in injection moulding tools comprising needle shut-off nozzles. Said actuating device has at least one travelling element (20), to which at least two shut- off needles (16) can be fixed and at least one actuating element (30), which is mounted so that it can be displaced longitudinally in a first direction (R1) and is coupled to the travelling element (20) in such a way that a displacement of the actuating element (30) in the first direction (R1) is converted into a displacement of the travelling element (20) in a second direction (R2) running transversally to said first direction (R1). To achieve the accurate and permanently reliable guidance of the sliding mechanism, according to the invention the actuating element (30), which slides in a guide unit (90) in the first direction (R1), is provided with an additional force- guided element (50).

L'invention concerne un dispositif d'actionnement (10) de pointeaux de vannes dans des outils de moulage par injection comportant des buses à vannes à pointeaux. Ledit dispositif d'actionnement comporte au moins un élément de levée (20) sur lequel au moins deux pointeaux de vannes (16) peuvent être fixés, et au moins un élément d'actionnement (30) logé de façon à coulisser longitudinalement dans une première direction (R1), couplé à l'élément de levée (20) de telle manière qu'un mouvement de l'élément d'actionnement (30) dans la première direction (R1) est transformé en un mouvement de l'élément de levée (20) dans une deuxième direction (R2) perpendiculaire à la première direction (R1). Pour obtenir un guidage précis, durable et efficace du mécanisme de poussoir, l'élément d'actionnement (30) guidé en glissement dans un guide (90) dans la première direction (R1) est pourvu d'un guide forcé supplémentaire (50).

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