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

Details Process and device for the production of a tube for lining pipe Process and device for the production of a tube for lining pipe

1996-11-04

1998-12-08

Bell, Janyce

Coating processes

Interior of hollow article coating

Vacuum or pressure utilized

427230, 427294, 427296, 4273455, 4273935, 4274342, 4274344, 4274122, B05D 722

Patent

active

058466029

ABSTRACT:
In the production of a transportable, multilayery 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).

REFERENCES:
patent: 4009063 (1977-02-01), Wood
patent: 4353939 (1982-10-01), Becker et al.
patent: 4353940 (1982-10-01), Becker et al.
patent: 4357371 (1982-11-01), Heinrich et al.

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