Casting method

Details Casting method Casting method

2007-04-17

2007-04-17

Lin, Kuang Y. (Department: 1725)

Metal founding

Process

Shaping a forming surface

C164S122200, C164S516000

Reexamination Certificate

active

11065442

ABSTRACT:
In order to more effectively utilise seed crystals35, 55to achieve a single crystal grain orientation for a component without the problems of utilising a helix constriction previously necessary to avoid epitaxial grain competition and growth. The present invention creates a wax component pattern30. This pattern30comprises integral sections of wax for a mould component section and for a spacer section with the seed crystal35or holder for that crystal therebetween. This pattern30is then utilised in order to form a final refractory mould within which the component is formed. By appropriate choice of the spacer section32, an appropriate spacing between an upper surface of the seed55which will be the initial interface with molten castable material to form the component and a chiller surface through which heat is transferred can be determined in order to achieve successful transfer of the seed55orientation to the formed component.

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