Abstract:
A steel cord for rubber reinforcement comprises a first group of core filaments (105) having a number of m and a second group of sheath filaments (110) having a number of n, m is three or four, the core filaments (105) are forming a helix, the core filaments (105) are not twisted together and being substantially parallel or the core filaments (105) have a twist pitch being more than 300mm; the second group and the first group are twisted with each other, and the sheath filaments (110) are forming a flattened helix in the same direction of the helix of the core filaments (105), and the sheath filaments (110) have a cord twist pitch, at any cross-section of the steel cord, at least one interstice between two adjacent core filaments (105) is present. The steel cord has improved abrasion resistance and can contribute to the reduction of the weight of the tire.
Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung eines Seils (1), bei dem Faserbündel (2) zur Bildung von Faserlitzen (3) vor und/oder an einem Verseilpunkt mit einem verflüssigten Matrixmaterial (5) belegt und beim Verlitzen in das verflüssigte Matrixmaterial (5) eingebettet werden, mittels der Faserlitzen (3) ein Faserkern (6) des Seils (1) gebildet wird und um den Faserkern (6) Drähte oder Drahtlitzen (7) gewunden werden. Erfindungsgemäß wird das Matrixmaterial der Faserlitzen nach der Verlitzung verfestigt und die Faserlitzen (3) werden zur Bildung des Faserkerns (6) anschließend ohne weitere Belegung unmittelbar miteinander verseilt. Zweckmäßigerweise werden die Faserlitzen (3) bei oder nach ihrer Verseilung zu dem Faserkern (6) erwärmt derart, dass das Matrixmaterial (5) zumindest einzelner der Faserlitzen (3), vorzugsweise sämtliche der Faserlitzen (3), erweicht, sich mit dem Matrixmaterial (5) jeweils anderer der Faserlitzen (3) verbindet und anschließend unter Bildung eines Stoffschlusses untereinander verfestigt wird. Die Erfindung betrifft ferner ein mittels des Verfahrens herstellbares Seil.
Abstract:
A wire rope (10, 20), comprising: a core (12, 22), a plurality of outer strands (18, 28) and a plurality of separator strands (17, 27) laid on said core (12, 22), and a first plastic jacket (19) around said plurality of outer strands (18, 19) and said plurality of separator strands (17, 27), wherein said plurality of separator strands (17, 27) extend from said core (12, 22) and in-between each pair of said plurality of outer strands (18, 28) so as to produce and maintain gaps between said pair of said plurality of outer strands (18, 28). Plastic impregnation of the wire rope (10, 20) can be ensured due to the separator strands /17, 27).
Abstract:
A steel cord (10) for reinforcing rubber product, wherein the steel cord (10) has a flat cross section and at least one core wire (12) consists out of zinc. The flat steel cord (10) with the zinc core wire (12) is manufactured by pressing or rolling steel cord (10) with approximate round cross section into a flat cross section. Besides the benefits of a flat steel cord, the manufacturing process is simple, provides a stable geometry of the steel cord and the steel cord features cathodic protection to improve corrosion resistance.
Abstract:
A hybrid rope constructed of a plurality of strands, wherein each strand is constructed of a fiber center, a jacket surrounding the fiber center, and a plurality of wires surrounding the jacket. The fiber center can be constructed of one or more high-strength synthetic fibers or yarns. The jacket can be constructed of polypropylene, thermoplastic polyurethane, high- density polyethylene, linear low-density polyethylene, nylon or other similar materials. The jacket can have a braided or woven design and adds a protective layer between the fiber center and the wires. The wires can be constructed of high-strength steel wires, galvanized steel or stainless steel. The fibers or yarns that make of the fiber center are twisted to lay right and then covered with the jacket. The wires then surround the jacket and are twisted to lay to the left. This creates a torque-balanced condition of the hybrid rope.
Abstract:
A bundle of logs (62) is unitized by means of one or more log bundling strands (10, 20, 42, 64, 70) and one or more sleeves (43, 66, 80). Each of the bundling strands has a leading end and a trailing end. Each of the bundling strands (10, 20, 42, 64, 70) is wound around the logs to form the bundle so that the leading end (44) and the trailing end (46) run adjacent to one another over an overlapping length L1 and form a pair. One or more sleeves (43, 66, 80) have a length L2 which is smaller than the overlapping length L1. Each of the one or more sleeves (43, 66, 80) are crimped on one pair of the leading ends (44) and the trailing ends (46) within the overlapping length L1. At least some of the bundling strands (10, 20, 42, 64, 70) are provided with indents (26, 36, 47) or protrusions (76) at the outer surface and/or at least some of the sleeves (80) are provided with non-cylindrical inner surfaces. The indents (26, 36, 47), protrusions (76) and/or non-cylindrical inner surfaces improve gripping between the strands (10, 20, 42, 64, 70) and the sleeves (43, 66, 80) and / or reduce the length L2 of the sleeves (43, 66, 80).
Abstract:
A hybrid rope constructed of a plurality of strands, wherein each strand is constructed of a fiber center, a jacket surrounding the fiber center, and a plurality of wires surrounding the jacket. The fiber center can be constructed of one or more high-strength synthetic fibers or yarns. The jacket can be constructed of polypropylene, thermoplastic polyurethane, high-density polyethylene, linear low-density polyethylene, nylon or other similar materials. The jacket can have a braided or woven design and adds a protective layer between the fiber center and the wires. The wires can be constructed of high-strength steel wires, galvanized steel or stainless steel. The fibers or yarns that make of the fiber center are twisted to lay right and then covered with the jacket. The wires then surround the jacket and are twisted to lay to the left. This creates a torque-balanced condition of the hybrid rope.
Abstract:
A hybrid rope (40) or a hybrid strand (50) comprising a core element (42, 52), a first (44, 54) and a second (46, 56) metallic closed layer surrounding said core element (42, 52). The core element (42, 52) includes a bundle of synthetic yarns. The first metallic closed layer (44, 54) includes a plurality of first strands of wires helically twisted together with the core element (42, 52) in a first direction. The second metallic closed layer (46, 56) includes a plurality of second wires or strands helically twisted together with said core element (42, 52) and said first metallic closed layer (44, 54) in a second direction. The cross-sectional area of the core element (42, 52) is larger than the total cross-sectional area of the first (44, 54) and second (46, 56) metallic closed layers. A corresponding method of producing such a hybrid rope or hybrid strand is also disclosed.
Abstract:
An electric transmission-cable is provided, comprising a cable core having at least two individually coated and stranded wires, and a conductor surrounding the core, wherein the core is compacted. Further, a method of fabricating such compacted steel core is provided.
Abstract:
A steel rope safety system includes at least one steel rope having at least one strand, and the at least one rope or at least one strand is compacted. Further, a method is provided for making a steel rope safety system comprising the step of providing at least two wires, the step of stranding the wires thereby forming a strand for a rope and the step of compacting the strand. The steel rope safety system includes a guardrail system having vertical poles and horizontal compacted ropes which are held in place by hooks. The steel rope safety system may include non-round shaped, such as trapezoidal shaped compacted wires. There is likewise provided the use of compacted steel ropes as impact reducing material.