| 摘要 |
The mould arrangement comprises a mould body defining a mould cavity and cooling passages each having an opening in an upper surface of the mould body around an opening of the mould cavity. Air delivery means for delivering cooling air to the cooling passages comprises an annular chamber movable into an operative position in which openings in the bottom of the chamber communicate with the openings of the cooling passages so that air blown into the annular chamber enters the cooling passages. When the chamber is in its operative position, access can be obtained to the mould cavity through the center of the annular chamber. |
