Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1977-03-17
1978-11-07
Husar, Francis S.
Metal founding
Process
Shaping liquid metal against a forming surface
164 17, 164 33, 164 37, 164 72, 164122, 164138, 164164, B22D 1302, B22C 300, B22C 1310
Patent
active
041240561
ABSTRACT:
Tubular metal articles are produced by centrifugal casting in a rotary metal mold lined by centrifugally distributing a quantity of a dry finely particulate free flowing refractory material on the active mold surface with the quantity being in excess of that required for the lining, densifying the layer by rotating the mold at a rate such that the refractory layer is subjected to centrifugal force adequate to establish an equivalent specific gravity of at least 7.5, determined by multiplying the actual specific gravity of the refractory material by the number of gravities of centrifugal force, contouring the densified layer and removing the excess refractory material, rotating the mold at the casting rate and then introducing the molten metal for casting while continuing to rotate the mold at least that rate. Articles so cast have relatively smooth outer surfaces which require only finish machining. The invention employs no additives and thus eliminates the need for venting the metal mold, provides a relatively thick lining of predetermined insulating capability so as to control the grain structure of the cast metal, eliminates the usual end cores, and allows the refractory material to be recycled. The invention is particularly useful for casting articles, such as cylinder liner blanks, from grey iron, such articles having an outer enlargement, typically a transverse outer end flange. Cast according to the invention, such articles have Type A graphite throughout the entire inner surface and for at least a substantial portion of the thickness of the flange or other outer enlargement.
REFERENCES:
patent: 1581635 (1926-04-01), Henry et al.
patent: 2731690 (1956-01-01), Coupland, Jr. et al.
patent: 3437131 (1969-04-01), Ornitz
Hampilos Gus T.
Husar Francis S.
LandOfFree
Method and apparatus for centrifugal casting does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for centrifugal casting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for centrifugal casting will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2229547