Closing device on a plastic injection moulding machine

Details Closing device on a plastic injection moulding machine Closing device on a plastic injection moulding machine

B - Operations, Transporting

29

C

B29C 45/67 (2006.01)

Patent

CA 2426087

The invention relates to a closing device on a hydraulically operating plastic injection moulding machine, comprising at least one pressure cylinder unit (10) which is used to build up a locking pressure, a drive cylinder which is accommodated in the pressure piston (13) of the pressure cylinder unit and used to close the injection mould, in addition to a compensating cylinder (30) which receives or discharges a hydraulic medium coming from said pressure cylinder unit. The drive cylinder (20) is arranged concentrically with respect to the centre axis (m-m) of the pressure cylinder unit (10). The compensating cylinder (30) is also arranged concentrically with respect to the centre axis (m-m) of the pressure cylinder unit (10).This results in a space-saving structure which meets the requirements in terms of precision for the production of moulded articles.

L'invention concerne un dispositif de fermeture sur une machine ~ mouler par injection ~ fonctionnement hydraulique, qui comprend au moins une unit~ de cylindre de pression (10) g~n~rant la pression de verrouillage, un cylindre d'entra¹nement (20) log~ dans le piston de pression (13) de l'unit~ de cylindre de pression et servant ~ fermer le moule de moulage par injection, ainsi qu'un cylindre de compensation (30) pour la r~ception ou la distribution de milieu hydraulique provenant de l'unit~ de cylindre de pression. Le cylindre d'entra¹nement (20) est log~ concentrique par rapport ~ l'axe central (m-m) de l'unit~ de cylindre de pression (10). De mÚme, le cylindre de compensation (30) est log~ concentrique par rapport ~ l'axe central (m-m) de l'unit~ de cylindre de pression (10). On obtient ainsi une structure compacte qui satisfait ~galement aux exigences de pr~cision n~cessaires ~ la production de pi­ces moul~es par injection.

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