large cylindrical iron castings for paper drying and other ... iron castings presentation...david...

David Moore - Quality & Technical Manager with PMT Industries Ltd gave a presentation about the company, which is part of the PMT Group, owned by Italian company, the Nugo Group. The group has two main divisions, power generation and paper machinery. PMT Industries is part of the paper machinery division. As one of only a few foundries in the world with deep pits, the company is capable of casting very large cast iron components, not only for the paper industry but also for other industries. It is recognised for its excellence in quality castings. PMT Yankee, MG and Paper Dryers are designed and manufactured at the company’s 12,000 m2 factory in Bolton, UK. Where state of the art computerised design, engineering, foundry and machining resources combine with traditional skills and craftsmanship in a unique single location. Around 500 Yankee and MG dryers have been designed and manufactured since 1884 and thousands of paper dryers, continually developing the designs and production techniques and building up a vast experience and know-how in this specialised area of papermaking technology. The castings manufactured range in size from 1 Tonne to 150 Tonnes in grey and ductile cast iron, and the presentation describes the various stages in production that the company uses, particularly some of the unusual moulding techniques that are necessary in order to produce the very large castings. It is one of very few foundries to use loam (a mixture of red sand, clay, water and horse manure) applied by hand to a refractory brick lining. The company also uses cement sand for some of the large diameter castings, again a process that is unusual. The foundry has one of the largest melting capacity medium frequency electric furnace installations in Europe. The twin 9 MW inverter powered and computer controlled furnaces melt 38 Tonnes of iron per hour, with each 12 Tonnes charge being melted to 1450° C in just 38 minutes. The presentation also describes some of the process control techniques that are used by the company and the quality standards to which the company is certified.

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Large Cylindrical Iron Large Cylindrical Iron Castings for Paper Drying Castings for Paper Drying

and other Applicationsand other Applications

By David Moore – Quality & Technical Manager

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