Abstract
This paper aims to present the effect of specific operational factors (temperature and humidity) on the selected mechanical properties of a conveyor belt. The tests were conducted in a climatic chamber, simulating the effect of both minus and plus temperatures −30 °C to 80 °C (243 K to 353 K) at specific humidity, and in a thermal shock chamber where a varying number of ageing cycles was applied for a specific range of thermal shocks. Six different tests in the climatic chamber and four different tests in a thermal shock chamber were conducted. The results of the climatic chamber tests demonstrate that many strength parameters have undesired values at a temperature of 10 °C (283 K) and 80 °C (353 K) at a relative humidity of 80%. Interestingly, the results revealed that tensile strength, tensile modulus and yield strength are higher at below 0 °C temperature than at above 0 °C temperature. For example, comparing the temperature −30 °C (243 K) and +30 °C (303 K) obtained a difference of tensile modulus of nearly 10%, and comparing the temperature −30 °C (243 K) and +10 °C (283 K) the differences were 22%.
Highlights
The use of primitive versions of conveyor belts by manufacturers dates back to the 19th century.For the purpose of carrying coal, ores and other products, Thomas Robins invented a conveyor belt in1892
This paper aims to present the effect of these specific operational factors on selected strength parameters of the conveyor belts that comprise the main element of the sorting line in a Slovakian central sorting center
Be concluded that below 0 ◦ C temperatures do not have a negative effect on the mechanical properties of the conveyor belt samples
Summary
The use of primitive versions of conveyor belts by manufacturers dates back to the 19th century.For the purpose of carrying coal, ores and other products, Thomas Robins invented a conveyor belt in1892. The use of primitive versions of conveyor belts by manufacturers dates back to the 19th century. For the purpose of carrying coal, ores and other products, Thomas Robins invented a conveyor belt in. The Swedish company Sandvik invented and started producing steel conveyor belts in 1901. Conveyor belts, invented by Richard Sutcliffe in 1905, were used in coal mines and revolutionized the entire mining industry. Henry Ford introduced assembly lines at his factory in 1913 that used conveyor belts. Mail volumes in the postal system were snowballing, and postal operators had to deal with this situation by installing automatic sorting machines. This Letter Sorting Machine was made of an upper and lower section, a set of five sorting keyboards and a conveyor belt. That was the first usage of a conveyor belt in an automatic postal processing system
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