Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1994-11-25
1996-10-01
Lavinder, Jack W.
Metal founding
Process
Shaping liquid metal against a forming surface
164 97, 164 34, B22D 1300, B22D 1914, B22C 902
Patent
active
055604200
ABSTRACT:
A process for casting a hard-faced cylindrical product such as an automobile camshaft includes the steps of: (a) preparing a composition formed from a molten base metal and an additive in particle form and having a hardness value greater than the hardness value of the base metal; (b) introducing the composition into a flask containing a meltable pattern of a cylindrical product such as an automobile camshaft to be manufactured and encased in sand to allow the composition to melt the pattern and assume the shape of the pattern within the sand; and (c) rotating the flask containing the pattern about the longitudinal axes of both the flask and the pattern as the molten base metal containing the additive in particle form is introduced into the flask to cause particles of the additive entrained in the molten base metal to migrate by centrifugal action to the radial extremities of the pattern and thereby provide a cylindrical product having a hardness value greater at it's radial extremities than at its center when the molten base metal solidifies.
REFERENCES:
patent: 5052464 (1991-10-01), Natori
patent: 5083602 (1992-01-01), Skibo
patent: 5372176 (1994-12-01), Brown et al.
Argetsinger Edward R.
Hansen Jeffrey S.
Turner Paul C.
Wilson Rick D.
Koltos E. Philip
Lavinder Jack W.
Lin I.-H.
The United States of America as represented by the Secretary of
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