| 摘要 |
A cap 42 with a lower spherical surface 46 is held against the flared head 38 of a casting core 24 and rests on the spherical upper surface of an annular bed 50 which is fixed above a casting head 12. The bed is coaxial with an enlarged orifice 40 for the passage of the core, and is coaxial with a casting tank 16. Projections 70 are distributed regularly around the periphery of the core and come into contact with the internal wall of a mold 22 near a die opening to center the core in the mold by possibly moving the cap in relation to the bed, before final tightening. |
