VACUUM COOLING ROLLER

摘要

The invention relates to a vacuum cooling roller for steel-like materials, particularly for paper webs or cardboard webs, plastic or metal foils. whose sleeve has air passage openings ( 22 ), which can be subjected to a vacuum at least in the wrapping area of the web and which have means for cooling the jacket surface ( 9 ). The cooling of the jacket surface ( 9 ) ensues via cooling channels ( 21 ), particularly bores, which axially run inside the roller sleeve ( 9 ) and through which a cooling medium flows.