Steel cord
Steel cord (also steel cord ) is a wire rope made of brass- plated or galvanized steel wire.
- as parallel arranged filaments with power transmission in a preferred direction (for example in V-belts and conveyor belts )
- as a woven fabric for two-dimensional force absorption (for example in conveyor belts or belts) or to limit stretching (for example in car tires or hydraulic hoses).
In 1938 Michelin manufactured the first pneumatic tire ("Metalic") with steel cord. In 1951, Continental AG began producing conveyor belts with a steel carcass.
Belted tires for automobiles (cars, trucks) have belts made of steel. The tensile forces in the sidewalls of car tires are absorbed by polyester threads in crossed layers.
The term clincher (on bicycles with drop center rim) comes from steel wire - formerly a welded ring, today rather several turns of thinner wire - in the edges of the U-shaped tire cross-section, which causes the pressurized tire to sit on the rim shoulder within the rim edge. Wheel tires with larger rim diameters with fine steel wires can be twisted to half the diameter with an eight. So-called folding tires, which are folded several times to form a compact bundle, typically have aramid threads instead of wire inlays , which when the tire is filled with air are significantly longer than steel wire.
Tubular bicycle tires , on the other hand, are held on the slightly concave flat-bed rim without wire by glue ("tire cement"), tire tape and air pressure.
If the rubber and galvanized wire in very old tires become porous, steel wire can be attacked by water, weakened by rust, and fail under tensile stress.
Web links
- Technical key figures. Archived from the original on July 24, 2008 ; accessed on September 5, 2016 .