Extrusion die for thermoplastic webs

B - Operations – Transporting – 29 – C

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B29C 47/16 (2006.01)

Patent

CA 2054889

A flat web of sizable thickness made of thermoplastic can be extruded from an extrusion die without a restrictor bar if a thickness D of a restricting passage is made smaller than a shaping distance A of die lips (4, 5), and if at least one wall of the restricting passage (6) is adjustably designed as an elastic lip (7) by adjusting means (8), so that thickness D and distance A can be changed at the same time by actuating the adjusting means.

Bande plate d'épaisseur assez importante fabriquée de thermoplastique et pouvant être obtenue par extrusion à travers une matrice sans recours à une barre de restriction si l'épaisseur D du passage de restriction est plus petite que la distance de formage A entre les lèvres (4 et 5) de la matrice, et si au moins une des parois du passage de restriction (6) se présente sous forme de lèvre élastiquement réglable (7) à l'aide d'un dispositif de réglage, de telle sorte que l'épaisseur D et la distance A puisse être modifiées simultanément au moyen du dispositif de réglage.

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