Strip mill
Encyclopedia
The strip mill was a major innovation, with the first being erected at Ashland, Kentucky
in 1923. This provided a continuous process, cutting out the need to pass the plates over the rolls and to double them, as in a pack mill. At the end the strip was cut with a guillotine shear or rolled into a coil. Early (hot rolling) strip mills did not produce strip suitable for tinplate, but in 1929 cold rolling began to be used to reduce the gauge further. The first strip mill in the United Kingdom
was opened at Ebbw Vale
in 1938 with an annual output of 200,000 tons.
The strip mill had several advantages over pack mills:
Ashland, Kentucky
Ashland, formerly known as Poage Settlement, is a city in Boyd County, Kentucky, United States, nestled along the banks of the Ohio River. The population was 21,981 at the 2000 census. Ashland is a part of the Huntington-Ashland, WV-KY-OH, Metropolitan Statistical Area . As of the 2000 census, the...
in 1923. This provided a continuous process, cutting out the need to pass the plates over the rolls and to double them, as in a pack mill. At the end the strip was cut with a guillotine shear or rolled into a coil. Early (hot rolling) strip mills did not produce strip suitable for tinplate, but in 1929 cold rolling began to be used to reduce the gauge further. The first strip mill in the United Kingdom
United Kingdom
The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
was opened at Ebbw Vale
Ebbw Vale
Ebbw Vale is a town at the head of the valley formed by the Ebbw Fawr tributary of the Ebbw River, south Wales. It is the largest town and the administrative centre of Blaenau Gwent county borough...
in 1938 with an annual output of 200,000 tons.
The strip mill had several advantages over pack mills:
- It was cheaper due to having all parts of the process, starting with blast furnaceBlast furnaceA blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally iron.In a blast furnace, fuel and ore and flux are continuously supplied through the top of the furnace, while air is blown into the bottom of the chamber, so that the chemical reactions...
s on the same site. - Softer steel could be used.
- Larger sheets could be produced at lower cost and this reduced cost and enabled tinplate and steel sheet to be used for more purposes.
- It was capital intensive, rather than labour intensive.