A method and an apparatus capable of extrusion molding a comparatively
wide, thin ceramic sheet using a screw extruder while suppressing the
wrinkling thereof. The molding apparatus includes a screw-type extruder
and a mold at the forward end of the extruder is used to extrusion mold a
ceramic sheet from the ceramic material introduced into the extruder by
way of the mold. The extrusion molding is carried out while regulating the
temperature of the portion of the ceramic material passing through the
mold corresponding to each of a plurality of areas (control zones) into
which the mold is divided.
