Apparatus and process for the manufacture of a crosslinkable hose

摘要

Tubular film (3) is fed to a forming tube (12) where it is wrapped by a film (18) which is then sealed by welding to form an outer tube (20). The gap between the inner (3) and outer tube (20) is impregnated by filling it with a setting resin supplied from a feed (11). The impregnating region (22) is submerged in a bath (26) with the bath surface level (27) above its lower end. Independent claims are also included for the following: (1) Impregnating equipment for filling the gap between concentric tubes (3, 20) in which the impregnating region (22) is immersed in a bath (26) with the bath surface level (27) above the lower end of the impregnating region (22); (2) A hose that can be hardened, which is made by this method. The bath surface level (27) can be higher or lower than the level (28) of the impregnating fluid (23). The temperature of the bath (26), e.g. water, can be adjusted to control the viscosity of the impregnating fluid (23), e.g. resin. The lower end of the impregnating region (22) is kept closed by a nip or turning roller (25).