B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 49/12 (2006.01) B29C 49/06 (2006.01) B29C 49/56 (2006.01)
Patent
CA 2382398
The invention concerns a machine for making thermoplastic containers by stretching and blowing a preform (10), comprising several moulding stations (12) mounted on a rotary carrousel (14), each station (12) being provided with at least a stretch rod (20) whereof the sliding movement is controlled along an axis (An). The invention is characterised in that the stretch rod is controlled by a magnetic device comprising at least a fixed magnetic guide (36, 38, 40, 42) arranged about the axis (A1) of the carrousel (14) and a slide (24) which is integral with the stretch rod (20) and bears at least a magnetic shoe (32, 34) and the shoe and the guide co-operate by magnetic coupling such that the guide imposes a predetermined axial movement on the slide (24)
L'invention concerne une machine de fabrication de récipients en matière thermoplastique par étirage et soufflage d'une préforme (10), du type comportant plusieurs postes de moulage (12) qui sont montés sur un carrousel rotatif (14), chaque poste (12) étant muni d'au moins une tige d'étirage (20) qui est commandée en coulissement selon son axe (An), caractérisée en ce que la tige d'étirage (20) est commandée par un dispositif magnétique comprenant au moins un guide magnétique fixe (36, 38, 40, 42) agencé autour de l'axe (A1) du carrousel (14) et un coulisseau (24) qui est solidaire de la tige d'étirage (20) et qui porte au moins un patin magnétique (32, 34), et en ce que le patin et le guide coopèrent par couplage magnétique pour que le guide impose au coulisseau (24) un déplacement axial déterminé. Image
Goudreau Gage Dubuc
Sidel
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