Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1990-11-05
1992-05-19
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
164306, B22D 1804, B22D 1806
Patent
active
051139260
ABSTRACT:
A body frame for a motor bicycle includes a main frame, a head tube provided at a front end of the main frame and down tubes extending rearward from the main frame. The main frame, head tube and down tubes are cast with a light alloy into an integral form of a hollow and thin-wall structure. A production process of the body frame, wherein an integrally-formed core, which is formed into a shape similar to that of the body frame, is hollow and has good permeability. A molten metal is charged into the mold and a vacuum is applied to the interior of the core. The molten metal is charged into a cavity defined between the core and the molding surface of the mold by a low-pressure casting method, and the molten metal is solidified so as to cast the body frame, and a production apparatus of the body frame includes a liftable cope fitted to a vertical casting machine, a fixed drag, and slidable molds disposed in combination with the cope and being capable of horizontally sliding in a state that the cope is released from the drag. A body frame having both properties of light weight and high stiffness, and a production process and apparatus thereof is provided wherein casting defects are obviated a high-precision cast article, are provided.
REFERENCES:
patent: 2268676 (1942-01-01), Shanley
patent: 2448632 (1948-09-01), Smith
patent: 3756309 (1973-09-01), Nishiyama et al.
patent: 4727922 (1988-03-01), Nakano
patent: 4875518 (1989-10-01), Imura et al.
Fujikake Yasushi
Ito Osami
Ito Shuho
Kanzawa Yoshikazu
Morikawa Iwao
Honda Giken Kogyo Kabushiki Kaisha
Lin Kuang Y.
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