| 摘要 |
<p>PURPOSE:To form one-piece cores of intricate shapes by setting a liners to bisect a cavity, blowing sand into one, then displacing forming molds to set the other in a sand blowing posture, removing the liners, blowing sand and connecting and coupling the blown sand of both divided cavities. CONSTITUTION:Liners 18 are pushed onto the revolving shaft of a cavity 14 to bisect the cavity and molding sand is blown from a blow plate 15 into the upper divided cavity 14A. Next, a shell machine 7 is rotated 180 deg. half by a rotating device to bring the cavity 14A on the lower side and the other divided cavity 14B on the upper side where it faces the blow plate 15. Here, the liners 18 are removed in such a way as not to collapse undercut forming, thence molding sand is blown into the cavity 14B from the plate 15 to connect the blown sand of both cavities 14A, B.</p> |
