摘要:
An anti-vibration extruded sheathing (4) for cables (2) such as deep water mooring lines, mast stays and bridge cables, an extrusion method and extrusion apparatus comprising a rotatable die (35) for providing such sheathing (4) with at least one integral helical strake (5) are disclosed. The width of the strake (5) can be adjusted from a maximal width to a minimal width during the extrusion process, wherein the minimal width is adjustable to 0. By this means, a strake (5) with interruptions in the longitudinal direction of the cable can be produced in an efficient manner. Also a method and an apparatus for providing the sheathing with indicia using a laser marking unit (20) is disclosed.
摘要:
Metallic load-carrying elements (3, 23) are helically spun around a central member (1, 21) comprising a supporting member or members (9, 24) constituting a structure (4, 24) which defines at least one passage (6, 26) wholly accommodating at least one electrical or optical transmission element (7, 27). The transmission element is thereby protected against stresses applied to the load-carrying elements. The central structure is radially and longitudinally self-supporting. The central member (1, 21) is formed by causing the supporting member or members (9, 24) and the transmission element or elements (7, 27) to converge to a point from which the central member (1, 21) is withdrawn continuously. The load-carrying elements (3, 23) are subsequently applied to the central member (1, 21). Cales of practically unlimited length can be produced.
摘要:
An anti-vibration extruded sheathing (4) for cables (2) such as deep water mooring lines, mast stays and bridge cables, an extrusion method and extrusion apparatus comprising a rotatable die (35) for providing such sheathing (4) with at least one integral helical strake (5) are disclosed. The width of the strake (5) can be adjusted from a maximal width to a minimal width during the extrusion process, wherein the minimal width is adjustable to 0. By this means, a strake (5) with interruptions in the longitudinal direction of the cable can be produced in an efficient manner. Also a method and an apparatus for providing the sheathing with indicia using a laser marking unit (20) is disclosed.