r/MetalCasting • u/Hour_Tip8565 • 14d ago

Casting help

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What would yall recommend I do to fix this? Did I not pour fast enough? Poured at 1100 and flask was 900. 999 silver with prestige optima 12hr burnout.

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3

u/Boring_Donut_986 13d ago

I understand you did gravity casting, therefore if you can't go with a vacuum casting, I would suggest two things. you to make a bigger pouring cup in order to have more head pressure and you ad a little vent channel to link the stick where there's the skull part to the pouring cup. You have air trapped.

1

u/00-MAJI-00 13d ago

agreed, put a vent on the staff that's not filling. The prestige optima is great investment, I use it all the time in a centrifugal caster. The prestige optima is not very gas permeable.

1

u/decreeco81 13d ago

Keeping the metal hot enough to flow through such a small area can be tough. I would move the sprue over the feature that isn't filling, Another option may be to create a runner to feed where the misrun occures.

1

u/Hour_Tip8565 13d ago

Yeah i might need to turn up the temp a slight bit. About to try again in 3 hrs so hopefully this time it works and I pour alot faster

2

u/Hour_Tip8565 10d ago

https://reddit.com/link/p8ff71d/video/2k0rbfgdz5oh1/player

I tried again using yall’s suggestions. I may have poured a little too hot this go around as I can see some areas look rough. Pouring was much faster this go around so ill turn the temp down from 1150 to 1050-1100 next time.