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Getting a piece out of a mold.

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Yikes! It's probably gone past leather hard by now! If it doesn't drop out easily, there is a chance that there's problems with the mold design - this is assuming the mold is not a commercial one. Can the OP post a photo?

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Undercut is when the lines of the piece curve inward in a way that prevents the piece from dropping out freely from the mold. Everywhere there is an undercut, there should be a division in the mold so that each piece can be removed without damaging the form. A commercial mold will have been designed to accommodate undercuts. Homemade molds can be learning experiences. 

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Is it a plaster mold?  If so, the piece should separate itself when it's leather hard.  If it's some other material, probably not gonna end well.  I saw someone trying to use a silicone mold with disastrous results.  Silicone and plastic are good for concrete or plaster that self set, not as good for clay which requires drying.

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So it's probably not a plaster mold

Edit: wolfs original reply to this was "no, it's not white". They edited to "what".  This edit is to clear any potential confusion.

Edited by liambesaw

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13 minutes ago, Wolf said:

I hope it’s not bone dry I haven’t seen it in 5 days

If your mold is white, it's probably made of plaster.

Clay poured into a small (under 12") plaster mold, and then poured out after a few or several minutes, will usually be dry enough to remove after a few hours. If you open it by removing the bands and separating the plaster parts, the piece should be dry enough to take out without distortion.  If you leave it in for a longer time, it will still probably come out fine  

When you poured liquid clay (slip) into the mold, did you let it set for a period of time and then empty out the extra slip? If not, you will have made a very solid piece instead of a thin-walled piece. 

If you just pressed a piece of clay into a one-piece mold, it can be removed as soon as the clay has firmed up enough to keep its shape. 

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Yay! When the clay dries completely in the mold, it will shrink (all clay does, from wet to dry) and can sometimes get hung up where it wouldn't if were only just dry enough to remove. If you do it again, open the mold sooner. :) 

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