The cup-head was lathed from a block of aluminum and it attaches to the shaft the same as a regular wheel-head. Plaster molds simply drop in and sit on their shoulders. The shoulder is the only point-of-contact, this prevents chattering while the mold spins when under pressure. I am using these molds for a casting-jiggering process. I cast a mug in the mold first. After pouring out the slip I wait a few minutes and then, as the wheel spins, finish the rim using a 3D-printed template and rib the inside surface. I do not actually use the jigger arm, it is easier just to hold the template in hand.
Jiggering is a process of forming pottery that employs a spinning plaster mold and a tapered template to press soft clay or porcelain against it.
A process in ceramic production where items are slip-cast first and then finished using a jigger wheel.
2019 Jiggering-Casting Project