B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/00 (2006.01) B29C 47/20 (2006.01) B29C 47/90 (2006.01)
Patent
CA 2187351
A method for manufacturing plastic plastic such that the pipe has apertures formed therein when the pipe is viewed in cross section, comprising the steps of having hot plastic flow through a die (15) and subsequently be extruded through a die head (17) to form an extruded wall component having first and second end walls, with the die head (17) having formed therein a plurality of first sized gaps (17a) and a plurality of second sized gaps (17b), with the second sized gaps (17b) having an aperture (17c) located inside each of said second sized gaps (17b). The die (15) is secured to a manifold assembly (10) with the manifold assembly (10) comprising sets of tubes (16) located centrally of one another, each set of tubes (16) comprising a water inlet tube (150), a tube through which a vaccum is pulled (140), and a water return tube (130). Each set of tubes (16) is positioned longitudinally within a respective die manifold with the outermost surface of each set of tubes (16) spaced a first distance from the respective die manifold. Each of the respective tubes (16) extends through the die (15).
L'invention se rapporte à un procédé de fabrication de tuyau en plastique présentant des ouvertures vu en coupe transversale. Ce procédé consiste à produire un écoulement de plastique chaud dans une matrice (15), puis à l'extruder dans une tête (17) de matrice afin d'obtenir un composant extrudé possédant des première et seconde parois terminales, la tête (17) de matrice comportant une pluralité de cavités d'une première dimension (17a) et une pluralité de cavités d'une seconde dimension (17b), ces dernières (17b) comportant chacune une ouverture (17c). La matrice (15) est fixée à un ensemble tubulure (10) qui comprend des jeux de tubes (16) placés au centre les uns des autres, chaque jeu de tubes (16) comprenant un tube d'admission d'eau (150), un tube dans lequel est créé un vide (140), et un tube de renvoi d'eau (130). Chaque jeu de tubes (16) est placé longitudinalement dans une tubulure respective, leur surface la plus à l'extérieur étant espacée d'une première distance de la tubulure respective. Chacun des tubes respectifs (16) s'étend à travers la matrice (15).
Martin Larry L.
Tsigopoulos Dimitris
Wise John
Advanced Drainage Systems Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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