Nozzle header

摘要

The invention relates to an apparatus and a method for spraying a coolant (2) to a work piece (1) comprising a coolant feed line (3), at least one delivery nozzle (4) for delivering the coolant (2), and shielding means (6) which surround at least part of said delivery nozzle (4). The shielding means (6) are arranged to form an essentially closed space together with the work piece (1), and said shielding means (6) comprise exhausting means (11) for exhausting gas from the essentially closed space, and further comprise means (7, 8) for keeping the outside of said shielding means (6) at a temperature above the dew point.