Heated needle-locking nozzle

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 45/28 (2006.01) B29C 45/74 (2006.01)

Patent

CA 2193565

The heated needle-locking nozzle for plastic injection molding machines, for injection molding tools or for hot channel equipment has two sections (12, 14), the section (12) of which is furnished with a central, rod-shaped heating element (28) which forms, together with the inside wall of section (12), a ring-shaped flow channel for the melt which is introduced into the section (12) through a machine nozzle (18). On the outside diameter of the section (12), a sleeve is guided in a movable and sealing manner which is guided in a sealing manner with its outside diameter in the second section (14). The sleeve is connected with a power drive on its free outwardly pointing end and with a locking needle (24) on its end pointing into the flow channel of the section (14). The nozzle opening on the end (20) of the section (14) is closed with the needle (24) when the sleeve is moved in direction of arrow (26) (Fig. 2).

L'ajutage chauffé à aiguille de blocage pour presses à injection de matières plastiques, pour outils de moulage par injection ou pour équipement à canal chaud a deux sections (12, 14), la section (12) dudit ajutage étant dotée d'un élément chauffant central (28) à profil de tige qui forme, avec la paroi intérieure de la section (12), un canal d'écoulement en anneau pour le produit fondu qui est introduit dans la section (12) par le bec (18) d'une machine. Sur le diamètre extérieur de la section (12), un manchon est guidé de manière mobile et étanche, lequel est guidé de façon étanche avec son diamètre extérieur dans la deuxième section (14). Le manchon est raccordé à un entraînement mécanique sur son bout libre pointant vers l'extérieur et à une aiguille de blocage (24) sur son bout pointant dans le canal d'écoulement de la section (14). L'orifice de l'ajutage sur le bout (20) de la section (14) est fermé par l'aiguille (24) lorsque le manchon est déplacé dans le sens de la flèche (26) (fig. 2).

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