Device and method for pushing glass objects

C - Chemistry – Metallurgy – 03 – B

Patent

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Details

C03B 9/453 (2006.01)

Patent

CA 2360729

The invention relates to a device (1) that is provided with a pusher (7) which is fixed to the free ends of two parallel piston rods (13, 14). The piston-cylinder units (15, 16) appurtenant thereto are fixed to a support structure (17) and can be pivoted to-and-fro, together with said structure, around a vertical axis (18) and about approximately 105° between a placing plate (3) and a conveyor belt (5). Compressed air nozzles (11) for producing a negative pressure in angles (10) of the pusher (7) are supplied with compressed air from a first feeding chamber (22) by means of a supply channel (12) of the pusher (7) and one (13) of the piston rods and the pistons (21) appurtenant thereto. The supply is carried out by means of a first directional control valve (29) of a first compressed air source being provided with relatively low pressure. The pusher (7) is pushed forwards by means of the piston-cylinder unit (16) and a second directional control valve (40) of a second compressed air source (42) being provided with relatively high pressure. The pusher (7) is withdrawn by impinging upon withdrawal chambers (35, 43) with compressed air which is taken from the second compressed air source (42) by means of a third directional control valve (46).

Le dispositif (1) selon l'invention comporte un chariot (7) qui est fixé aux extrémités libres de deux tiges de piston (13, 14) parallèles. Les ensembles piston-cylindre (15, 16) sont fixés sur une structure de support (17) et peuvent avec celle-ci pivoter autour d'un axe vertical (18) sur environ 105 DEG , en effectuant un mouvement de va-et-vient entre une plaque de dépôt (3) et une bande transporteuse (5). Des buses à air comprimé (11), servant à produire une dépression dans les angles (10) du chariot (7), sont alimentées en air comprimé par l'intermédiaire d'un canal d'alimentation (12) dudit chariot (7) et d'une (13) des tiges de piston et du piston (21) associé, à partir d'une première chambre de poussée. Cette opération se fait par l'intermédiaire d'un premier distributeur (29), à partir d'une première source d'air comprimé dont la pression est relativement basse. La poussée du chariot (7) est effectuée par l'ensemble piston-cylindre (16), par l'intermédiaire d'un second distributeur (40), à partir d'une seconde source d'air comprimé (42) dont la pression est relativement élevée. Le retrait du chariot (7) se fait par introduction d'air comprimé dans des chambres de retrait (35, 43), cet air comprimé étant prélevé à partir de la seconde source d'air comprimé (42), par l'intermédiaire d'un troisième distributeur (46).

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