Method and apparatus for cooling a sheet-shaped or web-shaped substrate through variation in absorption and/or reflection of heat radiating from the substrate

摘要

In a method of cooling a sheet-shaped or web-shaped substrate, such as a plastic sheet or a plastic web, the substrate is moved along a cooling path, and heat radiating from the substrate is absorbed and/or reflected along at least one zone of the cooling path to provide a controlled cooling pattern, by using covering elements which are disposed above and/or below the substrate, whereby the zone can be adjusted by the arrangement and/or number of covering elements.