Thursday, September 10, 2020

My biggest, most complex cast yet

 

This casting is 60cm (2 feet) long, and has 4 cores, it needs to be dead flat, so I can't live with any shrinkage. A liberal coating of talc to make sure everything separates, I'd hate to do all that work and have the whole thing stick together like a previous smaller casting did.
It's all rammed up, with a tapered sprue, and some pretty big risers over the ends and over the webbing.


It separated cleanly, with the pattern stuck in the cope. Not a huge surprise, and not a problem.

 I cut the gates, and the pattern came out cleanly, I used the split patterns the I made the cores with to make sure the cores were placed correctly.

And now it's all closed up, and waiting for the pour.
 
Cores in place 
Gates Cut 
Pouring Basin 
Clamps Locked 

I know that I have left very little room around the pattern, I have no more sand, I was left with about 2 mugs full of sand when I finished ramming this up. I also know that my pouring spout and center riser are too close to the flask. It will catch fire. I'll chuck some sand over it. I hope I only need to pour this once. If I mess up, then by the time I chuck out the burnt sand, I won't have enough left for another try so I'll have to shell out and buy another bag.
Wish me luck



3 comments:

  1. Good luck mate, can't wait to see how it turns out! I am also on the Gingery metalwork shop "path", but just started with the first book.

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    Replies
    1. Thanks, I'm a little bit apprehensive about the bigger pour

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  2. I am also very interested in seing this project to the end. Keep us posted

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