fido
09-29-2006, 07:52 PM
Hi I have a Seaco bottom pour and a lyman mould for my 44, sraight WW no thermometer. I am new to casting.
If I hold the mould up to the bottom pour spout I seem to get a bubble where the sprue is cut off. This starts happening part way through the session.
If I hold the mould close but not touching the spout it works better as far as no air bubble.
Is this normal? I would rather hold the mould up to the spout it is easier and seems to make a sharper edge on the bottom of the bullet rather than a radiuses edge indicating a better fill.
I have tried different heat settings, the spout freezes if the temp gets too low most of what I have casted thus far are frosty, so I think I am hot enough.
It seems like the mould sprue plate is cooling off the spout causing a partial freeze while the bullet is finishing filling, since it doesn’t do it when the mould doesn't touch the spout.
I would appreciate any input.
Stephen
If I hold the mould up to the bottom pour spout I seem to get a bubble where the sprue is cut off. This starts happening part way through the session.
If I hold the mould close but not touching the spout it works better as far as no air bubble.
Is this normal? I would rather hold the mould up to the spout it is easier and seems to make a sharper edge on the bottom of the bullet rather than a radiuses edge indicating a better fill.
I have tried different heat settings, the spout freezes if the temp gets too low most of what I have casted thus far are frosty, so I think I am hot enough.
It seems like the mould sprue plate is cooling off the spout causing a partial freeze while the bullet is finishing filling, since it doesn’t do it when the mould doesn't touch the spout.
I would appreciate any input.
Stephen