| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the fillability to the highest extent, in a simple constitution, in an apparatus for making a mold by injecting molding sand 41 held in a holding part 2 of a blowing head 1 by injecting into a cavity 36 in a forming mold 35 by feeding a pressed gas. <P>SOLUTION: The pressure of the pressed gas feeding in the holding part 2 is discontinuously risen at least one time while feeding the pressed gas into the holding part 2. Concretely, a low pressure tank (the first air tank 12) for storing a low pressure gas and a high pressure tank (the second air tank 13) for storing a high pressure gas are arranged, and the low pressure gas is started to be fed into the holding part 2 and thereafter, the high pressure gas is fed into the holding part 2. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
