| 摘要 |
An arrangement to assist in heat transfer through a mold for applications su ch as injection molding of plastics material including at least one closed chamber within th e mold, the chamber being only partially filled with liquid and a remainder of the chamber being filled with substantially only vapour of the liquid within the chamber, at least a porti on of the chamber being positioned to transmit heat from a targeted location of the mold into liquid within the chamber, and condensing means adapted by reason of heat exchange to effect condensation of vapour within the chamber, the liquid being retained at or distributed so as to reach different heights within the chamber. This is achieved in one case by the addition of a foaming agent in the liquid. In another case by having a flock attached to the inner surface of the chamber. In a further example there are separate tiers of reservoirs holding the liquid above a base level of the liquid.
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