B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/40 (2006.01) B29C 47/00 (2006.01)
Patent
CA 2462480
The invention concerns endless screw elements for a twin-screw extruder having shafts rotating in the same direction whereon are mounted said screw elements with closely interlaced outer profile. Said screw elements enable fibres, in particular natural fibres, to be smoothly incorporated in a molten synthetic mass and a maximum fibre length to be maintained. Therefor, a plurality of structural elements (54) is arranged at the surface of the screw elements (60), said structural elements not projecting relative to the outer profile of the screw elements.
La présente invention concerne des éléments vis sans fin pour extrudeuse à deux vis possédant des arbres tournant dans le même sens sur lesquels sont montés lesdits éléments vis à profil externe finement entrecroisé. Lesdits éléments vis permettent une incorporation délicate des fibres, en particulier également de fibres naturelles, dans une masse synthétique fondue et le maintien d'une longueur des fibres la plus longue possible. A cet effet, une pluralité d'éléments structuraux de surface (54) est placée à la surface des éléments vis (60), lesdits éléments structuraux ne faisant pas saillie par rapport au profil externe des éléments vis.
Abendschein Matthias
Fritz Hans-Gerhard
Ruch Joachim
Fetherstonhaugh & Co.
Krauss-Maffei Kunststofftechnik Gmbh
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