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:
There is provided a steel cord including a plurality of untwisted core filaments of steel aligned in parallel, and a layer of sheath filaments of steel twisted around the core filaments so as to be unevenly distributed around the core filaments, wherein interstices between the filaments are maintained during vulcanization thereby achieving improved rubber penetration (sufficiently adhering rubber to the core filaments). Since the cross sectional length of the steel cord 10 is greater than the minimum cross sectional length, interstices A are maintained between sheath filaments 14 under the tension and pressure p of the surrounding rubber 16 applied to the steel cord 10 during vulcanization. Rubber 16 penetrates into the steel cord 10 through the interstices A, and sufficiently adhere to core filaments 12 to achieve high rubber penetration.
Abstract:
In an elevator rope, a plurality of core rope strands are laid together around a core strand. A core rope strand assembly is constituted by these core rope strands. The core strand has a core strand main body and a resin core strand coating body that coats the core strand main body. Each of the core rope strands has a core rope strand main body. The core rope strand assembly is coated by a resin core rope coating body. A plurality of outer layer strands are laid together around the core rope coating body. An outer layer strand assembly is constituted by these outer layer strands. The outer layer strand assembly is coated by a resin outer layer coating body.
Abstract:
A wire cable (3) for window regulators of automobiles is disclosed. In the wire cable (3), the core strand (31) has a double-layer twisted strand structure with an F+6+12 element wire structure, and consists of a high-strength synthetic resin filament (31A) used as a core element wire (F), six internal element wires (31B) primarily twisted around the core element wire to form an internal layer around the core element wire, and twelve external element wires (31C) secondarily twisted around the internal layer to form an external layer around the internal layer. Eight external strands (32), having a single-layer twisted strand structure with a 1+6 element wire structure, are twisted around the core strand to form an 8x7+(F+6+12) element wire structure of the wire cable (3) in cooperation with the core strand (31). The synthetic resin filament (31A) used as the core element wire of the core strand (31) has a diameter slightly larger than that of the internal and external element wires (31B,31C) of the core strand (31). The core strand (31) is also compressed at a compression ration of 2 ∼ 10%, thus bringing its element wires (31B,31C) into surface contact with each other in place of point contact. In this wire cable (3), the element wires (31B,31C) of the core strand (31) are not likely to be deformed or broken, thus being improved in its fatigue resistance against a repeated bending action, in addition to improving the productivity of the wire cables.
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 steel cord for the reinforcement of rubber articles has a three-layer twisting structure comprising a core (1) of 2 steel filaments, a middle sheath layer (2) of 6 steel filaments, and an outer sheath layer (3) of 11 steel filaments, in which a ratio ds/dc of filament diameter ds in the middle and outer sheath layers to filament diameter dc in the core is within a range of 1.15-1.5, and a twisting pitch of the core is not less than 20 mm. Such steel cord may be used as a reinforcing member in for example a heavy duty pneumatic radial tire or a conveyor belt.
Abstract:
L'âme comprend un élément cannelé (1) en matériau polymère ou élastomère à cannelures hélicoïdales à espacement symétrique (2) ayant chacune la forme d'un arc elliptique en section transversale perpendiculaire à l'axe de l'âme. Une région centrale (3) peut contenir un élément de renforcement ou des conducteurs ou des fibres optiques.