B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
B65H 18/26 (2006.01) B65H 18/16 (2006.01) B65H 19/22 (2006.01)
Patent
CA 2258186
The invention relates to a nip force control system in a reel-up gear for a paper machine comprising a pair of primary arms (6, 7) and secondary arms (8, 9) for supporting and positioning a tambour core (2, 3) at the paper web winding operation as well as at the so-called change-over procedure when the tambour core is replaced. Each of the arms are connected to a hydraulic cylinder (10, 11) for positioning the arms and the primary- as well as the secondary arms are provided with load cells (12, 15) for measuring the nip force (F) for respective arm against the tambour core (2, 3). The control system also includes load cells (17) in the holding bracket (4) of the tambour core for measuring the additional force from said holding bracket. By this location of the load cells close to the measuring point an improved nip force control is obtained, especially during the critical change-over procedure.
Système de régulation de la force de pincement dans un mécanisme de bobinage d'une machine à papier. Le système comprend deux leviers primaires (6, 7) et deux leviers secondaires (8, 9) supportant et assurant le positionnement d'une bobine (2, 3) lors de l'enroulement du ruban de papier ainsi que lors de la procédure de remplacement, lorsque la bobine doit être remplacée. Chacun des leviers est relié à un vérin hydraulique (10, 11) assurant leur positionnement, les leviers primaires et secondaires comportant une cellule dynamométrique (12, 15) assurant le dosage de la force de pincement (F) de chaque levier contre la bobine (2, 3). Le système de régulation prévoit en outre des cellules dynamométriques (17) dans la console de fixation (4) de la bobine, pour mesurer la force additionnelle appliquée par ladite console. En positionnant ainsi les cellules dynamométriques à proximité du point de mesure, on obtient une amélioration de la régulation de la force de pincement, surtout lors de la procédure délicate de changement de bobine.
Fetherstonhaugh & Co.
Nobel Elektronik Ab
Vishay Nobel Aktiebolag
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