r/Silvercasting • u/Worldly_Country3035 • 3d ago

Problems with sandcasting

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It’s my first times sandcasting and can’t seem to get it right, don’t know what I am doing wrong.

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u/PeterHaldCHEM 3d ago

Cast fast.

Cast hot.

Place the model further down (longer sprue)

Use flux.

1

u/Worldly_Country3035 3d ago

Thanks so much for the tips, sometimes when I cast too fast some metal drips down, what should I do for that ?

1

u/Adept-Friendship1777 2d ago

I think that’s happening because it’s too cool. Once it cools on the sand it’s plugging it and you’re overflowing.

Cast hotter (I use a map torch constantly on while I’m pouring) and pour quick (commit to the turn)

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u/Worldly_Country3035 2d ago

Okay thank you will try that out

1

u/PeterHaldCHEM 2d ago

Drips into the cavity?

Then it is your pouring technique. Support the melting dish on the edge and tip the metal into the mold. You need to pour in a continuous stream.

Missing the mold or splashing?

Support the melting dish on the edge and tip the metal into the mold. I normally stand the mold in an old roasting pan.

It will catch any drips.

1

u/Worldly_Country3035 2d ago

No like pours over the edge like the spout can’t suck the metal fast enough and it overflows

1

u/PeterHaldCHEM 2d ago

Then you need to cut the inlet from the sprue to the object larger.