Abstract: A method of producing extruded ceramic products by extruding a ceramic forming material through an extruding opening, includes a step of coating a liquid, which is nonvolatile at ordinary room temperatures, on a surface of an extruded ceramic product. The liquid is preferably coated on the surface with the aid of capillary action. An apparatus for producing extruded ceramic products includes a forward end portion having an extruding opening for extruding a ceramic forming material and a guide passage for introducing the ceramic forming material into the extruding opening, a liquid supply section provided on the forward end portion for supplying a liquid, which is nonvolatile at ordinary room temperatures, to an outer surface of a product of the ceramic forming material extruded from the extruding opening, and a liquid supply device for supplying the liquid to the liquid supply section.

Abstract: A method of extruding a ceramic batch supplied from a vacuum auger machine into a formed body by a plunger molding machine, included the steps of loosening and crushing a supplied ceramic batch in the vacuum auger machine, extruding the loosened and crushed ceramic batch from the vacuum auger machine into a formed columnar body which is of a size able to be inserted into a cylinder of the plunger molding machine, and extruding the formed columnar body from the plunger molding machine to form a formed body of a predetermined shape. An apparatus for extruding a ceramic batch includes a vacuum auger machine having of a vacuum kneading section for kneading a ceramic material to produce a ceramic batch, a columnar body forming section for forming the kneaded ceramic material into a columnar body, and a batch transfer section having an auger for transferring the ceramic batch to the columnar body forming section.