Multi-Shot Casting
First Claim
1. A casting mold (280;
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398) comprising;
a part-forming cavity (292, 294, 296) having a lower end and an upper end; and
at least one overflow passageway (302, 304, 310;
302-2;
304-2;
310-2) having an apex (314;
314-2) at a level between the upper end and the lower end.
4 Assignments
0 Petitions
Accused Products
Abstract
An alloy part is cast in a mold (280) having a part-forming cavity (292, 294, 296). The method comprises pouring a first alloy into the mold. The pouring causes: a surface (550) of the first alloy in the part-forming cavity to raise relative to the part-forming cavity; a branch flow of the poured first alloy to pass upwardly through a first portion (304) of a passageway; and the branch flow to pass downwardly through a second portion (310), of the passageway; solidifying some of the first alloy in the passageway to block the passageway while at least some of the first alloy in the part-forming cavity remains molten. A second alloy is poured into the mold atop the first alloy and solidified.
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Citations
16 Claims
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1. A casting mold (280;
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398) comprising;
a part-forming cavity (292, 294, 296) having a lower end and an upper end; and at least one overflow passageway (302, 304, 310;
302-2;
304-2;
310-2) having an apex (314;
314-2) at a level between the upper end and the lower end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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398) comprising;
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9. A casting mold comprising:
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a part-forming cavity (296) having a lower end and an upper end (406); a pour cone; and a downsprue extending from the pour cone toward the part-forming cavity and comprising; a lower portion (402) having a plurality of ports in communication with the part-forming cavity; and an upper portion telescoping (404) relative to the lower portion and coupling the lower portion to the pour cone. - View Dependent Claims (10, 11, 12, 13)
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14. A method for casting with a mold (600) having a plurality of part cavities, the method comprising:
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a first pour through a first pour cone (602), the first pour filling a lower portion of each of the part cavities; and a second pour through a second pour cone (604), the second pour filling an upper portion of each of the part cavities. - View Dependent Claims (15, 16)
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Specification