I just purchased some hollow dies for a square wall-mounted extruder in a shared pottery space. (No one in charge of the room. It's a non-profit Artisan Learning Center, well equipped but no one using it now was there in the beginning.) The only dies they had previously were for solid items. I want to extrude hollow shapes, and I was excited to try the new dies this morning, but it was a failure! Instead of one hollow tube it produced two halves of a tube, completely separate from each other.
The dies came with a cross-piece with three bolts to fit into the die and the center piece. I installed the die in what seemed the logical way, with the connecting bar above the die, and loaded nice soft B-Mix clay. The shape came out in 2 sections, all the time.
The cross piece is flat (maybe 1/16th inch thick) and about 1 1/2 inches tall. Seems like a much smaller connection would be better at letting the clay get itself back together in time!!
Any suggestions?? What did I do wrong? Thanks for any help.