| 摘要 |
A method of cooling a mould tool that is comprised of or includes at least in part (3, 4) a porous material having communicating pores, such as a microporous metal or metal alloy, with the aid of condensed gas, preferably CO2. Gas is delivered to the porous material in an essentially liquid state and is caused to vaporise as a result of pressure drops in cavities (9, 10) and pores in the material, to effectively cool the tool. The gas vaporised in the porous material (3, 4) is channelled to one or more conductors (15) sealingly connected to said material. These conductors conduct the gas to a condenser (14), in which the gas is again condensed. The therewith condensed gas is again delivered to the porous material (3, 4), said material being utilized as a communications link in the resultant tool-cooling circuit. The invention also relates to apparatus for use when carrying out the method.
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