Device for continuously manufacturing a connecting pipe with pipe sleeve

摘要

The spacing between inner nozzle and outer nozzle is no less than, or is greater than, the extent of the open region of the pipe in the conveying direction (4). Upstream and downstream with respect to the conveying direction, between the open region and an adjacent recess an annular ring is formed. The spacing between inner- and outer nozzles corresponds at least to the mean spacing of the annular rings.