Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung eines Drahtseils (1), bei dem ein Kernstrang (3) verdichtet wird und danach Litzenstränge (2) auf dem Kernstrang (3) verseilt werden, dadurch gekennzeichnet, dass der Kernstrang (3) zur Glättung seiner Oberfläche (10) vor Verseilung der Litzenstränge (2) gehämmert wird. Zweckmäßigerweise wird auf den Kernstrang (3) vor der Verseilung der Litzenstränge (2) eine Kunststoffschicht aufgebracht, wobei die Litzenstränge (2), vorzugsweise unter Erhitzung der Kunststoffschicht (7), in die Kunststoffschicht (7) eingedrückt werden. In der bevorzugten Ausführungsform der Erfindung ist der Kernstrang ein Kernseil (3) und die Litzenstränge Litzen (2) des Drahtseils (1) oder der Kernstrang ist eine Herzlitze und die Litzenstränge sind äußere Kernlitzen eines Kernseils des Drahtseils. Die Erfindung betrifft ferner das Drahtseil (1) und eine Vorrichtung zur Herstellung des Drahtseils (1).
Abstract:
A steel cord (10) for reinforcing rubber product comprises at least one core strand (12) and outer strands (14), the outer strands (14) are helically twisted around at least one core strand (12). Each of the strands (12, 14) comprises core steel filaments (16, 20) with the number of m and outer steel filaments with the number of n. The diameter of the core steel filaments in the core strand is Dcc, the diameter of the outer steel filaments in the core strand is Doc, the diameter of the core steel filament in the outer strand is Dco, and the diameter of the outer steel filament in the outer strand is Doo. The ratio of Dcc/Doc is not less than 1.04, the ratio of Dco/Doo is not less than 1.03, and the ratio of Doc/Dco is not less than 1. The core steel filaments and outer steel filaments are polygonally preformed before being twisted into strands. The steel cord is used for reinforcing off-the-road tire.
Abstract:
A steel cord (10) adapted for the reinforcement of rubber products, comprises a core strand (12) and six peripheral strands (14) concentrically surrounding the core strand (12). Each of the core and peripheral strands (12, 14) comprises a centre of two or more centre filaments (16) and two layers of filaments surrounding the centre. The core strand (12) has a diameter D1 which is greater than the diameter D2 of the peripheral strands (14). All the filaments (18, 20) of each layer have substantially the same diameter and a radially outer layer has a twist angle which is greater than a twist angle of a radially inner layer of the same strand. Each of the strands (12, 14) in the cord is composed of no more than twenty-six filaments (16, 18, 20) being twisted together.
Abstract:
The invention relates to a textile cord (50) having an at least triple twist (T1, T2, T3), comprising at least N strands (20a, 20b, 20c, 20d), where N is greater than 1, which are twisted together to a final twist T3 in a final direction D2, each strand being made up of M pre-strands (10a, 10b, 10c), where M is greater than 1, which pre-strands are in turn twisted to an intermediate twist T2 (T2a, T2b, T2c, T2d) in an intermediate direction D1 which is opposite to D2, with every pre-strand consisting of a spun fibre (5) that has been twisted on itself to an initial twist T1 (T1a, T1b, T1c) in the direction D1, wherein at least half the N times M spun fibres have an initial modulus of elasticity Mi greater than 800 cN/tex. This textile cord can advantageously be used as reinforcement in vehicle pneumatic tires, especially in the belt or the carcass ply of said pneumatic tires.
Abstract:
The invention relates to an aramid textile cord (50) having an at least triple twist (T1, T2, T3), comprising at least N strands (20a, 20b, 20c, 20d), where N is greater than 1, which strands are twisted together to a final twist T3 in a final direction D2, each strand being made up of M pre-strands (10a, 10b, 10c), where M is greater than 1, which pre-strands are in turn twisted to an intermediate twist T2 (T2a, T2b, T2c, T2d) in an intermediate direction D1 which is opposite to D2, with every pre-strand consisting of a spun fibre (5) that has been twisted on itself to an initial twist T1 (T1a, T1b, T1c) in the direction D1, wherein at least half the N times M spun fibres are spun aramid fibres. The textile cord can advantageously be used as reinforcement in vehicle pneumatic tires, especially in the belt or the carcass ply of said pneumatic tires.
Abstract:
A steel cord (10) for reinforcing rubber product comprises at least one core strand (12) and outer strands (14), the outer strands (14) are helically twisted around at least one core strand (12). Each of the strands (12, 14) comprises core steel filaments (16, 20) with the number of m and outer steel filaments with the number of n. The diameter of the core steel filaments in the core strand is Dcc, the diameter of the outer steel filaments in the core strand is Doc, the diameter of the core steel filament in the outer strand is Dco, and the diameter of the outer steel filament in the outer strand is Doo. The ratio of Dcc/Doc is not less than 1.04, the ratio of Dco/Doo is not less than 1.03, and the ratio of Doc/Dco is not less than 1. The core steel filaments and outer steel filaments are polygonally preformed before being twisted into strands. The steel cord is used for reinforcing off-the-road tire.
Abstract:
A pneumatic tyre (1) comprises a tread reinforcing belt (7) made of metallic cords (10), wherein each of the metallic cords is made up of six to twelve metallic filaments (F) whose diameter (d) is not less than 0.15 mm but less than 0.25 mm, the six to twelve metallic filaments (F) are grouped into a plurality of bunches (B) each including two to four filaments (F), the filaments of each bunch are twisted together at a first twisting pitch (Pf), the bunches (B) are twisted together into the cord at a final twist pitch (Pc) of from 10 to 40 mm, the first twisting pitch (Pf) is more than the final twist pitch (Pc), and the bunches (B) each include at least one waved filament (FA) which is two-dimensionally waved at wave pitches (Pw) in a range of from 5 to 30 times the diameter (d) of the filament and a wave height (h) in a range of from 0.2 to 3.0 times the diameter (d).