Abstract:
The present invention is directed to a steel rope safety system (30) comprising at least one steel rope (10, 20) having at least one strand(22), characterized in that said at least one rope (10, 20) or at least one strand is compacted. Further, the present invention is directed to a method for making a steel rope safety system (30) comprising the step of providing at least two wires (24), the step of stranding the wires thereby forming a strand for a rope and the step of compacting the strand. The present invention is also directed to the use of compacted steel ropes as impact reducing material.
Abstract:
An annular concentrically twisted bead cord reduced in weight and cost and improved in molding properties and annular core corrosive resistance. The annular core (1) is formed of a medium carbon steel or an alloy steel obtained by suppressing carbon content and adding the proper amounts of specified elements thereto. The diameter (d c ) of the annular core (1) to the diameter (d s ) of peripheral wires (2) meets the requirement of the expression, 1.04 = d c /d s = 1.30, and the peripheral wires (2) with a coil diameter of 0.5 to 1.3 times the coil diameter of the annular core (1) are used to provide the bead cord reduced in weight and cost and improved in molding properties. Also, an Al-Zn alloy plating or a thick Zn plating layer is formed on the surface of the steel wire of the annular core (1) or a stainless steel is used as the material of the annular core (1) to increase the corrosive resistance of the annular core (1).
Abstract:
軽量かつ安価で、成形性および環状コアの耐食性に優れたビードコードを得ることである。 環状コア1の材質を、中炭素鋼またはC含有量を低く抑えて特定元素を適量添加した合金鋼とし、環状コア1の直径d C が、側線ワイヤ2の直径d S に対して、1.04≦d C /d S ≦1.30の式を満足するようにするとともに、側線ワイヤ2として、コイル径が環状コア1のコイル径の0.5~1.3倍のものを使用することにより、軽量かつ安価で、成形性の良いビードコードが得られるようにした。また、環状コア1の鋼線表面にAl-Zn合金めっきまたはZnの厚いめっき層4を形成するか、あるいは環状コア1の材質としてステンレス鋼を用いることにより、環状コア1の耐食性を向上させた。
Abstract:
A steel cord for a rubber track main cord, where core filaments of a core strand is restricted from coming out of a rubber member. This is achieved by causing rubber to penetrate to core filament surfaces of the core strand without reducing a cord breaking load. A core strand (22) of a steel cord (10) is constituted of one core filament (22C) and five sheath filaments (22S) twisted around the core filament (22). Six sheath strands (26) are twisted around the core strand (22). A rubber member is highly penetratable into the core filament (22C) because sufficiently wide gaps are held between the sheath filaments (22S). The structure above realizes the steel cord (10) where the core filament (22C) is restricted from coming out.
Abstract:
A steel cord (10) comprises a core with one or more core steel filaments (12) and further comprises a first layer of intermediate steel filaments (14) twisted around the core, and a second layer of second steel filaments (18) twisted around the first layer. At least one of the intermediate steel filaments is individually coated by means of a polymer (16) with a minimum thickness of 0.010 mm. The polymer (16) reduces the fretting between the coated intermediate steel filaments (14) and the other steel filaments and makes the steel cord suitable for reinforcement of carcass plies of a tire.
Abstract:
A process for producing a steel cord for pneumatic tyres with a bunch of wires, the core of which consists of wire filaments (10) arranged in a bunch parallel and adjacent to one another. There are advantageously at least three wire filaments (10, 20), where at least two wire filaments (10) are spirally wound as filaments (10) forming a core (60) and run parallel and beside each other and at least one wire filament is spirally wound around the two core filaments (10) as the wrapping wire (20). According to the invention, the spiral deformation of the wire filaments (10) is obtained by false twisters (40). This spiral deformation of the wire filaments (10) especially prevents migration of the filaments from the cord composite. It is an advantage if residual torsional stresses between the core filaments and in connection with the restoring forces of the wrapping wire are relieved. The steel cord also advantageously has a flattened, especially oval, shape.
Abstract:
A reinforcement rope to be used in production of reinforced concrete constructions consists of an internal wire (1) and external wires (2) coiled thereupon and forming at least one external layer. The central wire (1) has an oval cross-section, and the external wires (2) coiled on it are in contact with each other and with the surface of the central wire (1). All the wires of the external layer (3) or only some of them have an oval cross-section.
Abstract:
Tyre (100) for vehicle wheels comprises a belt structure (106) comprising at least one reinforcing layer having a plurality of reinforcing cords (10), wherein each reinforcing cord (10) comprises a first metallic wire (11) having a first diameter and a second metallic wire (12) having a second diameter greater than the first diameter, wherein the first wire (11) is substantially straight and the second wire (12) is helically wound around the first wire (11) with a predetermined winding pitch (P).