| 摘要 |
In a method of making moulds and/or cores from e.g. mould sand and a binding agent capable of melting and solidifying when being heated or cooled, respectively, at a conversion temperature, the main novel feature is that said conversion temperature lies above the highest expected ambient temperature, preferably above 30 DEG C. By proceeding in this manner it is possible to achieve the same advantages as are known from the use of frozen moulds or cores (i.e. in which the binding agent is water) without having to alter existing equipment for making moulds and/or cores or providing same with cooling facilities. Further, by choosing a suitable binding agent with a conversion temperature (melting point) as mentioned, it is possible to make moulds and/or cores with high mechanical strength, especially advantageous when operating with automated foundry equipment. |
