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Thread: Casting 'Pewter'
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7th Oct 2012, 06:52 PM #1New Member
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Casting 'Pewter'
Hi all
I've made some moulds suitable for casting a low temperature tin/copper alloy. The problem is that the casting has a raised section at the top due to the surface tension of the alloy (similar in appearance to the old mercury thermometer). I want the alloy to be flat at the top of the casting. Any suggestions apart from filing the surface?
Cheers
Foccacia
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7th Oct 2012, 10:00 PM #2
If the shape permits (hint: post a picture of your pattern), I would use a two-part mold to include the top surface as confined. Set the top surface sloping upward toward a riser. After casting, cut off the riser.
Depending on the shape (hint: post a picture of your pattern), a different orientation might work better, with the riser elsewhere.
Cheers,
JoeOf course truth is stranger than fiction.
Fiction has to make sense. - Mark Twain
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