Metal founding – Process – Shaping a forming surface
Patent
1991-05-10
1991-11-05
Batten, Jr., J. Reed
Metal founding
Process
Shaping a forming surface
164 34, 164 63, 164255, B22C 902, B22C 904, B22D 1806
Patent
active
050624679
ABSTRACT:
Vacuum countergravity casting apparatus and process employ a container having a peripheral wall defining an open bottom chamber that receives one or more molds or destructible patterns. A first inherently unstable mass of particulates (e.g., binderless sand) is disposed in the chamber about the molds/patterns and a second supportive mass of bonded particulates (e.g., resin-bonded sand) is disposed in the chamber about the molds/patterns beneath the first mass. The second supportive mass is strong enough to support the first mass and preferably the molds/patterns as well as castings ultimately formed as necessary during the casting operation in the event of intentional or unexpected interruption of a negative differential pressure established between the inside and outside of the container.
REFERENCES:
patent: 4085790 (1978-04-01), Wittmoser
patent: 4340108 (1982-07-01), Chandley et al.
patent: 4606396 (1986-08-01), Chandley et al.
patent: 4616691 (1986-10-01), Voss
patent: 4658880 (1987-04-01), Voss
patent: 4745962 (1988-05-01), Mercer et al.
patent: 4787434 (1988-11-01), Cleary et al.
patent: 4828011 (1989-05-01), Hafer et al.
patent: 4848439 (1989-07-01), Plant
patent: 4874029 (1989-10-01), Chandley
patent: 4932461 (1990-06-01), Schaffer et al.
patent: 4957153 (1990-09-01), Chandley
patent: 4971131 (1990-11-01), Aubin et al.
Kubisch John G.
Wilczynski Paul D.
Batten, Jr. J. Reed
General Motors Corporation
LandOfFree
Vacuum countergravity casting apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vacuum countergravity casting apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vacuum countergravity casting apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-493301