Gating and Rizer Question.

Home enthusiasts discuss their Foundry & Casting work.

Moderator: Harold_V

User avatar
steamin10
Posts: 6712
Joined: Sun Jun 08, 2003 11:52 pm
Location: NW Indiana. Close to Lake Michigan S. tip

Re: Gating and Rizer Question.

Post by steamin10 »

Just to toss an idea at you, long thin castings have a flatten and fill problem, as the metal can chill and freezes before completing the mold and you get wrinkles or layering of the casting. One solution on fine casting is to use a triple sized diameter pouring gate and elevate the opposite side of the casting. (about 30 degrees or so). with a handle and perhaps a helper, a base board is lowered to level the casting when the metal is committed to the runner when mostly full. Upon lowering the flask to level the captive metal runs more evenly filling the entire space it flows through on the rise, so no layering occurs, and the metal is calm without infused air that has to escape somewhere. This rolling process is much the same for the permanent molds that make the famous Oscer statues, where the material must be flawless to be polished, so oxides and bubbles cannot be in the cast.

If the piece is thin enough, perhaps a 15 degree tilt up hill from the pour spout would be sufficient, set on blocking, although it does not solve the air problem, entrained in the stream.

Good luck.
Big Dave, former Millwright, Electrician, Environmental conditioning, and back yard Fixxit guy. Now retired, persuing boats, trains, and broken relics.
We have enough youth, how about a fountain of Smart. My computer beat me at chess, but not kickboxing
It is not getting caught in the rain, its learning to dance in it. People saying good morning, should have to prove it.
Post Reply