Extrusion molding apparatus for ceramic molded product

摘要

An extrusion molding apparatus comprises a shaping die for producing a ceramic molded product, and a screw extruder having built therein an extruding screw ( 40 ) for mixing while leading a ceramic material forward. The extruding screw ( 40 ) includes a pressing screw portion ( 410 ) having a first lead ( 411 ) and a dispersing screw portion ( 420 ) having a second lead ( 421 ) adjacent to a forward end ( 412 ) of the pressing screw portion ( 410 ). The second lead ( 421 ) is formed in such a manner that the rear ends of all the second lead surfaces ( 426 ) at the rear end ( 422 ) of the dispersing screw portion ( 420 ) and the forward end of the first lead surface ( 416 ) at the forward end ( 412 ) of the pressing screw portion ( 410 ) are displaced from each other.