Investment casting cores and methods

Details Investment casting cores and methods Investment casting cores and methods

2007-10-09

2007-10-09

Lin, Kuang Y. (Department: 1725)

Metal founding

Miscellaneous, apparatus

Reexamination Certificate

active

11421115

ABSTRACT:
An investment casting pattern is formed by forming a metallic first core element including at least one recess. The first core element is engaged to at least a mating one of an element of the die and a second core element. The recess serves to retain the first core element relative to the mating one. The die is assembled and a sacrificial material is introduced to the die to at least partially embed the first core element. The recess may be pre-formed prior to cutting the first core element from a larger sheet of material.

REFERENCES:
patent: 6626230 (2003-09-01), Woodrum et al.
patent: 6637500 (2003-10-01), Shah et al.
patent: 6896036 (2005-05-01), Schneiders et al.
patent: 6929054 (2005-08-01), Beals et al.
patent: 2004/0020629 (2004-02-01), Shah et al.
patent: 2005/0087319 (2005-04-01), Beals et al.

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