Winding mandrel in a winding apparatus for producing a liner hose for lining channels and pipes

The winding mandrel according to any one of the preceding claims, wherein the pressing means comprise at least one pneumatic spring element (18), which can be connected to a compressed air source (34) arranged in the interior of the base body (8).

A winding mandrel (1) in a winding apparatus for producing a liner hose (2) for lining channels or pipelines, which comprises an inner film hose (4), and a layer arranged thereon made of at least one fibrous strip (6) wound in an overlapping manner, and which is impregnated with a liquid reaction resin, comprising:

• a base body (8), accommodating at least a first guide mechanisms and a second guide mechanism (210, 212), each guide mechanism having a continually circulating belt (214, 216) by means of which the inner film hose (4) is moved in a feed direction (A), wherein the first guide mechanism and the second guide mechanism (210, 212) are coupled mechanically to one another via a central adjustment device (200) which is accommodated on the base body (8) and which moves the belts (214, 216) of the first and second guide mechanisms (210, 212) jointly by the same path distance in a radial direction away from a surface of the base body (8), and in that a pressing means comprises an actuator (218) which actuates the central adjustment device (200) as a function of a signal of a pressure sensor (220) contacting the inner film hose (4), in such a manner that the two belts (214, 216) of the guide mechanisms (210, 212) are pressed with a substantially constant pressure of equal magnitude against an inner side of the inner film hose (4).