i have gas pockets in brass gastings
- your pour temp may be too high- the range from melt to pour is critical.
you also may have some imporvem with a vibration table beneath your sand
box. I altered a cheap orbital sander and attached it to the bottom of my
frame to induce enough aggitation to improve this.
Bob Lanier, M.D.
Department of Pediatrics
University of North Texas
6407 Southwest Blvd
Fort Worth, Texas 76132
----- Original Message -----
Sent: Wednesday, January 11, 2006 1:18 AM
Subject: [hobbicast] need help. i have gas pockets in brass gastings
> i have gas pockets in my brass castings for no apperent reason. i have
> sufficent temp at pour, i vent the mold well, i bake any cores to remove
> moisture, and the green sand is not too wet or rammed to tight.( i've
> tried all that) a friend suggested "facing???" any help is welcome.
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