Device for blow moulding or blow drawing of thermoplastic...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 49/56 (2006.01) B29C 49/42 (2006.01)

Patent

CA 2495699

The invention relates to a device for blow moulding or blow drawing of containers made of thermoplastic preforms. The inventive moulding device is embodied in such a way that it is movable, mainly rotatable and comprises at least one wallet-type mould (1) provided with two mould-halfs (2a, 2b) rotatable with respect to each other around an axis (3); two links which are (6) connected to each other by one of the extremities thereof with the aid of a first pivot pin (7) and pivotally connected to two mould-halfs (2a, 2b) by the others extremities thereof on the both sides of the common pivoting axis thereof; actuation means which are (8-12) connected to the first pivot pin (7) and provided with at least one cam follower (10) interacting with at least one respective fixed cam (11, 12) in such a way than the first pivot pin (7) is moved in a direction towards the mould or away therefrom, thereby opening or closing the mould. Compensating means (13) acting in such a way that at least one cam follower permanently contacts the respective cam are connected to the pivot pin.

L'invention concerne un dispositif de moulage, par soufflage ou étirage~soufflage de, récipients à partir de préformes en matériau thermoplastique, ce dispositif de moulage étant mobile, notamment rotatif, et comportant au moins un moule porte-feuilles (1) avec deux demi-moules (2a, 2b) mutuellement pivotant sur un axe, (3) ; deux biellettes (6) solidarisées l'une à l'autre, par une première articulation (7), à l'une de leurs extrémités et solidarisées avec articulation, à leur autre extrémité, respectivement aux deux demi-moules (2a, 2b) de part et d'autre de l'axe de pivotement mutuel ; et des moyens d'actionnement (8-12) connectés à la première articulation (7) et comprenant au moins un galet suiveur (10) propre à coopérer avec au moins une came fixe respective (11, 12) de manière à provoquer un déplacement de l'articulation (7) en direction du moule ou en éloignement de celui-ci s'accompagnant respectivement de la fermeture ou de l'ouverture du moule. On associe à l'articulation des moyens compensateurs (13) propres à agir de manière telle que le au moins un galet suiveur (10) soit maintenu en permanence au contact de la came respective.

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