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These included the single-roll mill and the five-roll mill. The single-roll mill works by material passing between the roll and a fixed bar pressing against the roll. The five-roll mill incorporates four successively smaller in-running nips and hence, compared to the three-roll mill, allows the use of larger agglomerates as part of the input ...
Bridle rolls are used to increase or decrease the strip tension in a processing line or rolling mill. Sketch 7 shows two, three and four roll bridles indicating the variables. The bridle rolls normally come in a set of two, three, or four rolls of equal diameter, with each roll individually powered by an electric motor/generator. [18]
All of these mills are usually used for primary rolling and the roll diameters range from 60 to 140 cm (24 to 55 in). [10] To minimize the roll diameter a four-high or cluster mill is used. A small roll diameter is advantageous because less roll is in contact with the material, which results in a lower force and power requirement.
Mesta "machines" can be found in factories throughout the world and as of 1984 had equipment in 500 steel mills. [3] Mesta was the 488th largest American company in 1958 [4] and the 414th largest in 1959. [5]
In the 19th century roller mills were adapted to grist mills before replacing them. The mill used either steel or porcelain rollers. [1] Between the years 1865 and 1872, the Hungarian milling industry upgraded and expanded the use of stone mills combined with roller mills in a process known as Hungarian high milling.
The two roll rubber mill is used in almost every rubber production facility today. Many other inventors created rubber mills with varying degrees of similarity to Chaffee's initial designs. [3] George Watkinson patented a three roll design in 1894 while Harold Denmire patented a four roll design in 1932. [4] [5]