EuroWire November 2016

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News
Technology
November 2016 41
The technological evolution of the automotive industry has
obliged tyre manufacturers to develop products with improved
performance, safety, grip and environmental impact.
Both the rubber compounds used and the manufacturing
process determine these characteristics.
In this process it is important to have the presence of a metallic
belt composed of a fine steel cord netting formed from a series
of high tensile wires (which can reach values up to 4,200MPa)
with a brass surface to guarantee improved anchorage
characteristics.
The numerous types of steel cord formations, chosen by the
manufacturer in accordance with the desired dynamic and
static performance/characteristics of the finished tyre, are
based upon the concepts of quality and consistency in both
individual components and design parameters.
The steel cord production process is a complex and
sophisticated process based upon a combination of wire
reduction sequences (using both dry and wet drawing
equipment), heat and chemical (patenting, cleaning, brass
plating) treatments terminating with bunching machines.
The new, technologically advanced Eurolls double twist
bunching machine has been designed for high performance
(rotation speeds up to 5,000rpm), ease of threading (new
cable production) and operation/line control plus simplified
maintenance interventions.
The new concepts present in the machine not only guarantee
stability, a constant final product quality, high operating
flexibility for assembly of new wire formations and the use
of latest quality entry material (increased carbon content
and substantial presence of chromium) but also reduce the
difficulties encountered by tyre manufacturers when producing
a high quality final product.
Eurolls SpA – Italy
Website :
Steel cord technology for the tyre industry
▲ ▲ Eurolls’ new double twist bunching machine