Automobile Tires’ High-Carbon Steel Wire

It is a well-known fact that to manufacture an automobile tire more than 200 different materials are used, including high-carbon steel wire. In order to withstand the affecting forces, the tire tread is reinforced with steel wire or other products such as ropes or strands. These ropes are called steel cord. Steel cord can be of different constructions. To ensure a good adhesive bond between the rubber of the tire and the steel cord, the cord is either brass-plated or bronzed. The reason brass or bronze is used is because copper, which is a part of these alloys, makes a high-strength chemical composition with sulfur in rubber. For steel cord, the high carbon steel is usually used at 0.70–0.95% C. This amount of carbon ensures the high strength of the steel cord. This kind of high-quality, unalloyed steel has a pearlitic structure which is designed for multi-pass drawing. To ensure the specified technical characteristics, modern metal reinforcing materials for automobile tires, metal cord and bead wire, must withstand, first of all, a high breaking load with a minimum running meter weight. At present, reinforcing materials of the strength range 2800–3200 MPa are increasingly used, the manufacture of which requires high-strength wire. The production of such wire requires the use of a workpiece with high carbon content, changing the drawing regimes, patenting, and other operations. At the same time, it is necessary to achieve a reduction in the cost of wire manufacturing. In this context, the development and implementation of competitive processes for the manufacture of high-quality, high-strength wire as a reinforcing material for automobile tires is an urgent task.

Environmental Impacts and Recycling Processes of Waste Automobile Tires

Recycling is the inclusion of wastes that can be recycled into the production process by transforming them into secondary raw materials after various physical and/or chemical processes. The natural resources are not infinite. Of course it will run out one day. For this reason, the recycling process has gained a serious dimension for countries due to both economic and environmental factors. Although the recycling process of thermoplastic materials is known and frequently used by the science and industry community, the recycling of rubber materials has remained in the background. However, with the increase in the number of automobiles around the world, the increasing amount of solid waste tires puts the society in trouble both economically and environmentally. In this research, there are data on the introduction of automobile tires, which are a very serious waste throughout the country, to the economy.

Application of Terahertz Spectroscopy to Rubber Products: Evaluation of Vulcanization and Silica Macro Dispersion

Industrial applications of terahertz (THz) technology are becoming more widespread. In particular, novel evaluation methods for essential rubber products are being developed. THz absorbance spectra of various rubber polymers and reagents enable visualization of filler dispersions and vulcanization reactions. Here, improved visualization of the vulcanization reaction in thick rubber samples is discussed. Silica macro-dispersion is also analyzed because it is a general filler in automobile tires and has been difficult to evaluate with conventional techniques.

RESEARCH OF TECHNOLOGICAL PROPERTIES OF RUBBER MIXTURES BASED ON SYNTHETIC RUBBERS FILLED WITH CARBON-CONTAINING MATERIAL

The paper presents the results of studies of the physicochemical characteristics of the carbon-containing material obtained as a result of the pyrolysis of worn automobile tires. Ankerite (1.21%), zinc oxide (1.14%) and other components. Composite elastomeric materials based on rubbers SKI-3 and Nairit KR-50, filled with carboncontaining material, have been developed. Interconnections between structural radiations and the natural surface of a carbon-containing material and rubber macromolecules were found. The technological and rheological properties of the floor-elastomeric compositions with a carbon-containing effect were studied, and their optimal content in rubber compounds was shown.

Structural and Technological Features of an Installation for Recovery of End-of-life Automobile Tires

Automobile tires are one of the generated wastes from the road transport. According to an EU directive after 2006, end-of-life tires are subject to controlled collection and storage by traders. Direct incineration is unacceptable due to high levels of hazardous emissions. In addition to the high rate of depletion of natural resources, and in line with the “sustainable development” model, it is appropriate to create new advanced technologies for the proper utilization of natural resources through the reuse of end-of-life products. The pyrolysis technology of decomposition of raw materials is an innovative technology for production of fuels and metals from the disposal tires. This technology shows a reduced risk to public health and reduced levels of harmful substances in flue gases, has low operating costs and does not require separate waste collection. This paper focuses on the structural features of the pyrolysis installation for used automobile tires recycling. The installation has been implemented into production and has a capacity of 1 ton of end-of-life tires per hour. The result is 400 kg of liquid fuel, 400 kg of carbon and 100 kg of metal waste per hour.

Cordline multi-motor electric drive with energy recovery

The article offers a variant of developing a cordline electric drive in the production of automobile tires to increase the energy-efficient due operation of production lines based on interconnected electric drives with energy recovery. The modes of operation of the technological line of cord production with energy recovery is possible in the network are shown, requirements for the drive system are drawn up. Simulations in Matlab 10, Simulink and SimPowerSystems carried out the research. The developed version of the frequency-controlled electric drive allows increasing the energy efficiency of production lines in the production technology of automobile tires by using generator modes of asynchronous motors as a part of frequency-controlled electric drives.