Method and apparatus for manufacturing a hose for lining of pipelines and channel systems

摘要

A method of manufacturing a tubular liner for pipelines and sewers involves making at least one inner layer from fibre strips (6) whose edges (6a,6b) are overlapped either onto a similar (6) or a different (19) fibre strip. The strips (6,19) are made of a fibrous elastic material which is easily impregnated with resin and the edges are permanently bonded along a connecting line) in the overlapping areas (7a,7b) either by melting and fusing the fibres under pressure or by introducing resin between the edges and curing by radiation. Also claimed is a tubular liner made by the stated process and wrapped in a resin impermeable outer film is claimed. Also claimed is a plant for manufacturing the liner has one or more storage rolls (5,18') for the fibre strips, a horizontal working table (3), a guiding system for folding over the strip edges and a tube transporting system. Overlapping edges are joined either by nozzles (9) which feed resin beads (23) between the overlapping edges and a radiator (11) which cures the resin, or by a heater moving into the overlapping area to melt the strip edges and a device for compressing the melted edges. A wrapping unit applies an outer film cover to the inner layer.