Method and apparatus for hauling off extrusion products, in...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 47/34 (2006.01) B29C 37/00 (2006.01) B29C 47/90 (2006.01) B29C 47/92 (2006.01) B29D 23/00 (2006.01)

Patent

CA 2497457

The invention relates to a caterpillar take-off unit, in addition to a method for taking off extrusion products, in particular plastic pipes, using a caterpillar take-off unit comprising at least two caterpillar tracks. Said tracks can be arranged symmetrically in relation to a longitudinal axis of the caterpillar take-off unit, at least during the take-off process, and the distance from said unit can be varied. One disadvantage of known caterpillar take-off units is that they have previously had to be re-adjusted manually for each cross-sectional modification of the extruded product. According to the invention, a modification of the cross-section of the extrusion product is measured and the distance of the caterpillar tracks from the longitudinal axis is automatically adapted in accordance with said modification in such a way that the axis of symmetry of the extrusion product coincides with the longitudinal axis of the caterpillar take-off unit.

L'invention concerne une tireuse à chenilles, ainsi qu'un procédé de tirage de produits d'extrusion, en particulier de tubes de plastique, au moyen d'une tireuse à chenilles comprenant au moins deux chenilles, ces chenilles pouvant être disposées symétriquement par rapport à un axe longitudinal de la tireuse à chenilles et leur distance par rapport à cet axe pouvant être modifiée au moins pendant l'opération de tirage. L'inconvénient des tireuses à chenilles actuelles est que leur réglage doit être modifié manuellement en cas de modification de la section du produit extrudé. Selon l'invention, une modification de la section du produit d'extrusion est mesurée et la distance des chenilles par rapport à l'axe longitudinal est ajustée automatiquement en fonction de cette modification de telle sorte que l'axe de symétrie du produit d'extrusion coïncide avec l'axe longitudinal de la tireuse à chenilles.

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