Patent ID: 8758004

Claim:
An extruder comprising: an extruding section which kneads and extrudes a kneaded material including a ceramic raw material; a chamber drum connected to an extrusion port of the extruding section, and including a first space portion which extends from the extrusion port side of the extruding section in an extruding direction and allows the kneaded material to flow in the extruding direction, and a second space portion, which extends from a downstream side of the first space portion in a downward direction and is spaced a distance upstream from a downstream terminal end of the first space portion, and which allows the kneaded material to flow in the downward direction different from the extruding direction, and has a discharge port to discharge the kneaded material; and a forming section connected to the discharge port of the chamber drum, and including a die through which the kneaded material discharged through the discharge port of the chamber drum is pushed out, to extrude and form ceramic formed bodies.