Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1985-02-28
1986-08-26
Godici, Nicholas P.
Metal founding
Process
Shaping liquid metal against a forming surface
164129, 164137, 164339, 164358, 164361, 164363, 249109, 249110, B22C 908, B22D 2300
Patent
active
046076808
ABSTRACT:
A method for moulding multiple castings in which each mould is fed from a source of molten metal through a thin slit the width of which lies in the range 1.25 mm down to 0.25 mm. The cast articles can easily be removed from the runner and riser system after casting without a machining operation so that the casting moulds can be packed closer together and more castings can be produced from each mould assembly. The thin slit also acts as a filter. A particular mould assembly seen in FIG. 2 is cylindrical and comprises a plurality of wedge-shaped mould segments 2 having mould cavities 4 in abutting faces. A central runner passage 6 is formed when the mould segments are assembled and the metal flows into the mould cavities through narrow slits 10 in one edge of each mould. After casting and removal of the mould the narrow flashing formed in the slits can easily be broken to remove the cast articles from the metal formed in the central runner passage.
REFERENCES:
patent: 539209 (1895-05-01), Adams
patent: 1100831 (1914-06-01), Kline
patent: 1653232 (1927-12-01), Smith
patent: 2451505 (1948-10-01), Myskowski et al.
patent: 2806268 (1957-09-01), Bilter
patent: 3815661 (1974-06-01), Curran et al.
patent: 4072180 (1978-02-01), Hoult
patent: 4133371 (1979-01-01), Birch et al.
Swanson, D. C., "New Method of Filtering Molten Aluminum", In Foundry M & T, Jul. 1974, p. 94.
Close Rodney J.
Kington Alan D.
Mills David
Batten, Jr. J. Reed
Godici Nicholas P.
Rolls-Royce Limited
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