Closing unit with a clamping plate hydrostatically mounted...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 45/17 (2006.01) B30B 15/04 (2006.01) F16C 29/02 (2006.01)

Patent

CA 2576044

The invention relates to a closing unit, particularly for an injection moulding machine, comprising at least one moveable mould clamping plate (10) which is moveably arranged on a frame element (40). Lubrication is provided between the mould clamping plate (10) and the frame element (40) in order to facilitate displacement to and fro. At least one hydrostatic bearing arrangement is provided in at least one position between the mould clamping plate (10) and frame element (40) in order to avoid speed-dependent friction values normally associated with hydrodynamic bearings. The invention also relates to a method for the operation of a closing unit, wherein a pressure is built up in the hydrostatic bearing arrangement prior to displacement of the moveable mould clamping plate (10), the moveable mould clamping plate (10) is displaced and the pressure for the hydrostatic bearing arrangement is decreased after displacement.

L'invention concerne une unité de fermeture, notamment pour une presse d'injection, comportant au moins une plaque de fixation de moule (10) mobile, montée de manière à pouvoir se déplacer sur un élément de bâti (40). Une lubrification destinée à faciliter un coulissement alternatif est prévue entre la plaque de fixation de moule (10) et l'élément de bâti (40). Pour éviter des valeurs de friction, dépendant de la vitesse, apparaissant habituellement dans des paliers hydrodynamiques, un palier hydrostatique est prévu en au moins une position entre la plaque de fixation de moule (10) et l'élément de bâti (40). L'invention concerne également un procédé pour faire fonctionner une unité de fermeture, selon lequel, avant le coulissement de la plaque de fixation de moule (10) mobile, une pression est établie dans le palier hydrostatique, la plaque de fixation de moule (10) mobile coulisse, puis la pression pour le palier hydrostatique est réduite une fois le coulissement effectué.

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