Process and device for the production of a tube for lining...

B - Operations – Transporting – 32 – B

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B32B 1/08 (2006.01) B05D 1/40 (2006.01) B05D 7/22 (2006.01) B29B 15/12 (2006.01) B32B 5/00 (2006.01) F16L 55/165 (2006.01)

Patent

CA 2214236

In the production of a transportable, multilayer tube (1) with a gas-impermeable outer layer (2) and at least one layer (3) impregnated with a curable resin (11) and made of a composite fiber material (4) to line pipe conduits and sewer systems, using subatmospheric pressure and rollers (7, 8) between which is formed at least one nip (6) through which to feed tube (1), to even out and accelerate the impregnation, at first still unimpregnated tube (1) is fed from below into nip (6) and air is evacuated from unimpregnated section (1a) of tube (1). In doing so, liquid resin (11) is brought into full opening (1d), at first still open, of tube (1) and is dammed up by nip (6). Then tube (1) is taken off nip (6) with an upward-oriented component at such a speed that the border between impregnated and unimpregnated sections (1a or 1b) of tube (1) is essentially retained in the area of nip (6), and that then tube (1) finally is taken off through at least one other nip (36, 38, 39) and collected on a transport device (30).

Fabrication d'un tube multicouches (1) transportable possédant une couche extérieure imperméable au gaz (2) et au moins une couche (3) imprégnée d'une résine polymérisable (11), constitué d'un matériau composite (4). Le tube sert à revêtir les tuyaux de canalisation et les systèmes d'égout. Il est fabriqué en utilisant une pression subatmosphérique et des rouleaux (7, 8) entre lesquels se forme au moins un point de pinçage (6) où est passé le tube (1), pour égaliser et accélérer l'imprégnation. Le tube non encore imprégné (1) est d'abord poussé par le bas dans le point de pinçage (6), et l'air est expulsé de la section (1a) du tube (1). En même temps, la résine liquide (11) est dirigée dans l'ouverture (1d), d'abord encore béante, du tube (1) et est bloquée par le point de pinçage (6). Le tube (1) est ensuite sorti du point de pinçage (6) à l'aide d'un composant orienté vers le haut à une vitesse telle que la limite entre les sections imprégnée et non imprégnée (1a ou 1b) du tube (1) est essentiellement retenue dans la zone de pinçage (6), et qu'ensuite, le tube (1) passe finalement par au moins un autre point de pinçage (36, 38, 39) et est recueilli sur un dispositif de transport.

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