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Using metal wires in investment during casting -


#1

debubblizing
Sender: owner-orchid@ganoksin.com
Precedence: bulk

Hello, Another take on the de-bubblizing investment problem. In
another life I was a dental assistant and took bite impressions for
plaster molds. We did two things to remove bubbles. First the
impression was sprayed with a surfactant (don’t remember the name)
before carefully and slowly pouring in the plaster. Second, after
pouring the plaster, the whole investment was placed on a vibrator
for a minute or so. The shaking brought bubbles to the top of the
plaster.

I wonder if one could use the top of a vibrating tumbler in the same
way? Just an out of the box thought. Judy in Kansas

Judy M. Willingham, R.S. Biological and Agricultural Engineering 237
Seaton Hall Kansas State University Manhattan KS 66506 (785) 532-2936


#2

Hello, Another take on the de-bubblizing investment problem. In
another life I was a dental assistant and took bite impressions for
plaster molds. We did two things to remove bubbles. First the
impression was sprayed with a surfactant (don’t remember the name)
before carefully and slowly pouring in the plaster. Second, after
pouring the plaster, the whole investment was placed on a vibrator
for a minute or so. The shaking brought bubbles to the top of the
plaster.

I wonder if one could use the top of a vibrating tumbler in the same
way? Just an out of the box thought. Judy in Kansas

Judy M. Willingham, R.S. Biological and Agricultural Engineering 237
Seaton Hall Kansas State University Manhattan KS 66506 (785)
532-2936