Multiple extrusion head

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 49/42 (2006.01) B29C 49/04 (2006.01)

Patent

CA 2629980

The invention relates to a multiple extrusion head 1 for extrusion blow moulding machines, comprising a plurality of first extrusion heads 2 which are fixedly arranged side by side in a first row forming a first plane 3, and a plurality of second extrusion heads 4 which are fixedly arranged side by side in a second row forming a second plane 5 which extends parallel to the first plane 3. Per row, there has been provided a distributing device 6, 6a, 6b with first distributing channels 7, 10 which are arranged in a first plane 3 and a second plane 5 respectively and each of which is connected to an extrusion head 2 and 4 respectively, comprising a joint first and, respectively, second mass entrance 9 and 12. The distributing devices 6a, 6b are separated in the region of the first plane 3 and second plane respectively. Furthermore, there is provided a third distributing device 15 with third distributing channels 18 which are arranged in a third plane 16 extending at a right angle relative to the first plane 3 and to the second plane 5, wherein the two third distributing channels 18 start from a common third mass entrance 29. One of the two third distributing channels 18 is connected to the first mass entrance 9 and the further one is connected to the second mass entrance 12. The third distributing device 15 is separated in the third plane 16.

Tête d'extrusion multiple (1) pour machines de moulage par extrusion-soufflage comprenant plusieurs premières têtes d'extrusion (2) fixées côte à côte dans une première rangée formant un premier plan (3), et plusieurs secondes têtes d'extrusion (4) fixées côte à côte dans une seconde rangée et formant un second plan (5) qui s'étend parallèlement au premier (3). Chaque rangée comprend un dispositif de distribution (6, 6a, 6b) constitué d'un premier ensemble de canaux de distribution (7, 10), qui sont disposés en un premier plan (3) et en un second plan (5) respectivement, chacun étant connecté à une tête d'extrusion (2 et 4 respectivement), comprenant un premier point d'entrée commun et, respectivement, un second point d'entrée en masse commun (9, 12). Les dispositifs de distribution (6a, 6b) se séparent dans la région du premier plan (3) et du second plan. De plus, un troisième dispositif de distribution (15) et plusieurs troisièmes canaux de distribution (18) sont disposés sur un troisième plan (16) à angle droit par rapport au premier (3) et au second plan (5), de façon à ce que les deux troisièmes ensembles de canaux de distribution (18) émanent d'un point d'entrée en masse commun (29). L'un des deux troisièmes ensembles de canaux de distribution (18) est connecté au premier point d'entrée en masse (9), et l'autre est connecté au second point d'entrée en masse (12). Le troisième dispositif de distribution (15) se sépare dans un troisième plan (16).

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