| 摘要 |
PROBLEM TO BE SOLVED: To apply a separate compression with a least energy in different territories of each casting mold according to a shape of a model by closing or discharging a compressed gas from a large number of compressed gas conducting pipes being controlled independently each other against a casting sand filled in a casting frame on a model plate which has an exhaustion vent. SOLUTION: A model 4 is arranged on a model plate 3 having an exhaustion vent 2. A casting sand 5 is filled in a molding flush 6, which surrounds the model 4, via a filling frame 21, for forming a casting mold by compression. This compression is carried out by discharging the compressed gas from openings 7 of a large number of compressed gas conducting pipes 9 of a piping device 1 arranged on the filling frame 21 against whole of the casting sand 5 top part. In this case, opening valves 10 are installed to each of the compressed gas conducting pipes 9, which are connecting through a compression vessel 18 arranged above the piping device 1, for adjusting an opening degree with the control valves 16 so as to independently close the pipes or control the pressure. Thereby, a separate compression in any territory of the mold can be achieved efficiently.
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