George Lendich wrote:

I'll take what I can get :) 5 mm it is.

My foundry claims 3.6 mm but occasionally they have problems. Sand casting

is as

much an art as it is a science. A good foundry man knows from experience

where to put the

risers, gates and sprues. You are lucky you have no core boxes to deal

with.

My uneducated guess is he should fill that 13 MM face first. Is he talking

about a green

sand or dry sand mold? I think you might be able to preheat a dry sand

mold to

a several hundred degrees F with heat lamps to help the flow of the molten

aluminum.

A green sand mold might fall apart. I don't really know.

Paul,
We discussed filling the 13mm face separately, but he still felt the run was
too long for 4mm sides, he would have to pour the front and then the sides,
he felt that there was too much temperature difference for a successful
blend/join.
Not his words exactly, but the best I can interpret!

Your right in what you say, I think that we have to be guided in this by the
experts.
George (down under)

 
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