Method and device for manufacturing a stranded unit

摘要

A method and device for producing a stranded unit having a bundle of stranded elements each consisting of at least one light waveguide covered by a sheath with the elements being twisted alternately with a right-hand twist and a left-hand twist to form a bundle covered with an outer jacket characterized by forming the bundle of the stranded elements and moving the bundle through a guide tube to prevent unraveling and untwisting, extruding an outer jacket surrounding the guide tube and pulling the jacket longitudinally along the axis of the guide tube to reduce the diameter jacket and cooling the jacket. The inside diameter of the jacket is reduced to such degree that as the portion of the jacket is pulled off of the guide tube, it will assume the functions of the guide tube for the bundle of twisted elements. The device includes an arrangement for creating the twist of the elements and an extrusion head for forming the jacket surrounding the guide tube which preferably includes an arrangement which has a nozzle acting as a stranding die for introducing a filling material between the stranded elements.