| 摘要 |
PROBLEM TO BE SOLVED: To provide a soil kneading machine capable of avoiding the problem that wrinkling occurs on the inside surface of a cylindrical extrusion molding in the process of drying the cylindrical extrusion molding vertically by the soil kneading machine, leading to cracking with the wrinkle as the starting point and a method of extrusion-molding a body by the soil kneading machine.SOLUTION: In the process of manufacturing a ceramic product, e.g., a porcelain bushing, a nozzle having a cylindrical extrusion passage 4 formed with an outside-diameter nozzle 2 and an inside-diameter nozzle 3 is provided at an extrusion outlet of the soil kneading machine used to obtain a cylindrical body formed by extruding a body in a cylindrical form which is prepared by mixing and kneading together molding raw materials containing ceramic materials, and a ring part 5 protruded in the outer peripheral direction is formed at the end of the inside-diameter nozzle 3 on the side of extrusion. |
