Method of casting using expendable patterns

Details Method of casting using expendable patterns Method of casting using expendable patterns

1985-08-07

1986-09-23

Lin, Kuang Y.

Metal founding

Process

Shaping a forming surface

164 71, 164 65, 164 39, B22C 904, B22C 1510, B22C 1522

Patent

active

046129685

ABSTRACT:
A method of casting a metal article in a mould box comprises locating an expendable pattern in the box, the pattern having a gas permeable refractory coating thereon, placing and compacting unbonded particulate material about the pattern and supplying molten metal into the box so as to vaporize or burn away the pattern and form the article of defined shaped while applying a vacuum during casting. According to this invention, the method is improved by compacting the particulate material to a maximum bulk density where it contacts the coated pattern and applying a vacuum to the compacted particulate material so as to create sufficient pressure gradient in the height of the compacted material to maintain the integrity of the gas permeable refractory coating. In this way, the risk of mould collapse, metal breakout, and pollution are reduced.

REFERENCES:
patent: 3446265 (1969-05-01), Buck
patent: 3557867 (1971-01-01), Krzyzanowski
patent: 3678989 (1972-07-01), Krzyzanowski
patent: 3842899 (1974-10-01), Hauser-Lienhard
patent: 3944193 (1976-03-01), Imai et al.
patent: 4222429 (1980-09-01), Kemp

Affiliated with

Also associated with

Rating

Method of casting using expendable patterns 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 of casting using expendable patterns, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of casting using expendable patterns will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-760785