公开(公告)号：US3433285A

公开(公告)日：1969-03-18

申请号：US3433285D

申请日：1965-07-30

申请人： HARRISON E FELLOWS

发明人： FELLOWS HARRISON E

IPC分类号： B22C15/28 ,  B22C5/12 ,  B22C15/22

CPC分类号： B22C15/28

公开(公告)号：US3589431A

公开(公告)日：1971-06-29

申请号：US3589431D

申请日：1969-01-09

申请人： HARRISON E FELLOWS

发明人： FELLOWS HARRISON E

IPC分类号： B22C15/28

CPC分类号： B22C15/28

摘要： Bottomless cope and drag boxes mounted on a turntable are cleaned, assembled upon a pattern plate, turned on edge and clamped between closure platens and filled with molding sand. The platens are then advanced into the boxes to compress the sand against the patterns to form molds. Upon withdrawal of the platens, a sprue hole is made, the assembly is rotated to horizontal, and the boxes and contained molds are separated from the pattern plate, which is then withdrawn. After insertion of cores, if any, the boxes and molds are reclosed. An elevator rises through a withdrawal yoke into engagement with the mold whereupon a complementary platen opposing the elevator forces the sand mold downwardly from the boxes and into the plane of the yoke to the level of a withdrawal table onto which the yoke draws the mold, leaving the boxes empty for repetition of the process.