My Lee 356 120 TC developed a habit of giving horrible base flashing. I decided that it was worth some potentially mould ending work to see what I could do.
Removed the sprue plate and set the mould in the mill vise. I took maybe .002 off the top of the mould. Made it flat and also removed almost all galling at the pivot point.
I also flycut the bottom of the sprue plate. This removed the falling and as the photo shows did not cut the entire bottom of the plate.
I also removed a bit from the bushing the plate pivots under as the hinder plate was now able to flex upwards. I also removed a bit from the bottom of the shoulder on the pivot screw so the pivot end of the plate could be held snug.
Mould is back together now. Need to find time for a casting session to see if it was all worthwhile. May make a new plate to see if that helps at all. New plate would be a bit thicker.
Removed the sprue plate and set the mould in the mill vise. I took maybe .002 off the top of the mould. Made it flat and also removed almost all galling at the pivot point.
I also flycut the bottom of the sprue plate. This removed the falling and as the photo shows did not cut the entire bottom of the plate.
I also removed a bit from the bushing the plate pivots under as the hinder plate was now able to flex upwards. I also removed a bit from the bottom of the shoulder on the pivot screw so the pivot end of the plate could be held snug.
Mould is back together now. Need to find time for a casting session to see if it was all worthwhile. May make a new plate to see if that helps at all. New plate would be a bit thicker.