| 摘要 |
<p>The locating pins (50) have notched ends, (52, 54) each of which simultaneously restricts the movement of an expendable core in two orthogonal directions in a die casting die (20). A plurality of these new pins alone and with other pins project into the space between the printout cavity (26) in a die casting die and the printout portion (46) of an expendable core positioned in that cavity. The configurations of the space (51) around the printout portions of the cores permit molten metal injected into the die to produce a skin or skull over the printout portions, which skin can have thicker ribs or portions through it for further reinforcing the printout portions. These printout portions on the parting line between two dies may have restrictions at the junction of the printout portion with the main portion of the core to form break-off rings.</p> |
