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Fixing broken metal item with sand casting?
Posted by: Mr645
Date: April 30, 2020 11:25AM
I have an old scale I would like to fix for a decorative piece. At some point it was dropped and there is a small metal piece that broke off and is missing. It;s about 1.25" long and 1/2" tall, .25" thick. There is a near identical piece on the other corner I can use as a mold and I was thinking to mold it in sand and use JB weld to make a replacement piece and then JB weld it on.

Anyone have any knowledge about this process?
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Re: Fixing broken metal item with sand casting?
Posted by: Paul F.
Date: April 30, 2020 03:44PM
Hmm... I don't think JB Weld would flow nicely in a sand mold.
However, there are some videos on YouTube of using silicone caulk and cornstarch to make a silicone mold... that would work dandy!

Unless you're talking about casting it out of molten aluminum, in which case the sand mold would work.



Paul F.
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A sword never kills anybody; it is a tool in the killer's hand. - Lucius Annaeus Seneca c. 5 BC - 65 AD
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Good is the enemy of Excellent. Talent is not necessary for Excellence.
Persistence is necessary for Excellence. And Persistence is a Decision.

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Eureka, CA
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Re: Fixing broken metal item with sand casting?
Posted by: artie67
Date: April 30, 2020 05:35PM
Hey, Artie here. I made a call to my oldest buddy who is the guy to do your work. While I was explaining the project,and he was going through the process of making the piece. This is real easy for him and your pocketbook. Thanks...
If interested, send PM and I'll send his email.
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Re: Fixing broken metal item with sand casting?
Posted by: Mr645
Date: May 01, 2020 06:13AM
Thanks all. Yea, I have no idea how to replace this missing corner of the scale. But as I sit home with not much to do, I figured it's one more project I could learn, take on
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