| 摘要 |
The cooling arrangement comprises air blowing means (33), ducting and/or piping (34,36,44,32) arranged to conduct air from the air blowing means to a plenum chamber (80,90). The plenum chamber has exits (66) which communicate with cooling passages (62) in a mould (50) which extend substantially in a straight line to an exit to atmosphere. The air blowing means is arranged to create an air pressure of between 1100 and 200 mm of water at the entrances of the cooling passages and the ducting and/or piping and the plenum chamber are arranged to provide less resistance to the passage of air than the combined resistance of the cooling passages. |
