May I suggest that before mold closing you go through the cavity section with gas burner set for reducing (sooty) flame. That way you create a...
The defect could be ash residue due to incomplete burnout. Use some compressed air to get rid of it.
Today is a busy day for me. I do not have time to check the math, but I can do that later. Not to lose momentum of discussion => read this:...
No, I am stating that loss of heat decreases the shrinkage. I understood your cited comment as you claiming that higher heat loss (lower...
I would like to share my 2 cents. First, This is theoretically not correct :(. Let me explain. You pour your castings at some level of superheat....
I am pleasantly surprised by the image quality considering the low price of the microscope :)
Let me help regarding professional coatings. There are many many formulations. But, some common materials are: suspending agents: bentonite and...
Sorry, but I think that your centrifugal separator is not doing what you want it to do. Similar centripetal trap designs exist for ferrous metals...
For hobby microscope, you could do hand polishing without the turntable. Start with large grit sandpaper on a flat surface, pour a few drops of...
Thank you PatJ. I have been following prof. Campbell's work for over 15 years, and consequently Bob's work from the "start" and his cast...
My membership has just been approved. I googled and stumbled on your thread about Puhakka and bifilm theory so I thought I could join. I have no...
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