Sand casting foundry composition and method using thermally...

Details Sand casting foundry composition and method using thermally... Sand casting foundry composition and method using thermally...

B - Operations, Transporting

22

C

B22C 1/16 (2006.01)

Patent

CA 2427883

A sand casting foundry composition reduces thermal defects that cause veining in metal parts cast from sand casting foundry shapes formed from the foundry composition. Foundry sand grains are mixed substantially uniformly with thermally collapsible clay mineral particles, and a curable binder coats the sand grains and the thermally collapsible clay mineral particles to establish core and mold foundry shapes used to cast the metal part. Anti-veining capability occurs because the thermally collapsible clay mineral particles exhibit an inherent characteristic of crystal structure collapse upon exposure to temperatures encountered in casting the metal part. The crystal structure collapse yields space which is consumed by thermal expansion of the sand grains in the foundry composition. This compensatory effect avoids the creation of mechanical forces and stresses within the foundry shape that cause the cracks and fissures in the foundry shape that lead to veining.

Affiliated with

Also associated with

Rating

Sand casting foundry composition and method using thermally... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sand casting foundry composition and method using thermally..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sand casting foundry composition and method using thermally... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1604491