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Making Molds for Your Custom Aluminum and Brass Castings.
Making Molds can be allot of Fun, but it can be a real headache too.
I've got a ton of pictures already uploaded; now I just have to find the time to write the pages. Hang in there Guys... I'm working on it.
Lawyer BS to CYA.
WARNING!!!: You got a brain... USE IT! Building and working with a foundry furnace is "NOT" child's play. It can be very dangerous and if 'you' screw-up don't come crying back to me! If you don't know what you're doing and didn't take the time to read and study all the safety procedures that are available on the net, as well as your local library, and you get hurt that's your problem. You are responsible for yourself and your own actions and safety.
--- "NOT ME!" ---
There are a lot of "Do's and Don't's in the art of mold/pattern making.
It's a craft/profession all to it's self. It take years to learn all the tricks, so
don't get upset if you make a few mistakes along the way.
One of the "MAJOR" rules you must remember for hardwood/permanent patterns is "NO" sharp 90° corners!!!
Everything must have a radius/fillet even if it's just a sixteenth of an inch. Or your casting could fail.
Next is no outside edges are 90° the rule for this is 1° to 5° taper with most coming
out around 3°. If you don't you might not get your pattern out without damaging the sand pattern. (The longer/deeper
the outside of your pattern is the harder it will be to remove from the sand.
You don't have any of these problems with "Lost Foam" as the entire pattern is burned out and replace with your
aluminum or brass. But the downside is that it's a 'one-shot-deal'.
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