Manufacturing process of casing wall of approximately:
Bamboo take special several pieces, with string along thickness direction through the bamboo, then the vertical, andput the two together in a circle cylinder, with a fixed iron circle inside, outside with a rope tied.
Then the box mud deposited in circle tube and the outer wall, apply to certain thickness with a cloth dipped in water,the outer smooth, and then use the iron paring shaping. Good, remove the iron ring inside the cylinder, the cylindersurface from the inside out ring contraction, then smooth inner wall and shaping.
The box wall for good, move it to him a little dry. The manufacturing process generally is: take the stem base diameteris equal to or slightly greater than the outer diameter of the casing. The casing made, mud friends circle, stamped on the box of mud, the mud to fill the position of average case circle.
Then put a box of mud at the center, and the flapping, box bottom system in place, a little dry.
The casing wall and the box bottom dry moderate, the box wall edge dip box paste, it sits on the box bottom, then at the bonding repair cut flat.
The pot billet prepared is green (commonly known as soil box), soil box is not for firing blank, as long as the soil boxplating (i.e. roasting) into the sound box (cooked box), can be used in the manufacturing industry with blankrefractories for sagger with mullite, corundum mullite, alumina etc..
