Ngk Insulators, Inc.

Takuya Yamada

Hirotada Nakamura

Nobuyuki Umetsu

Hirotaka Henmi

Takayuki Onizuka

A method for producing a ceramic formed body comprises: a wet mixing step of adding a liquid containing water to ceramic raw material mixed powder and subjecting it to wet mixing in a continuous mixer; and an extrusion molding step of feeding the wet mixed powder obtained in the wet mixing step to an extruder by a belt feeder and extruding the wet mixed powder. In the method for producing the ceramic formed body, an amount of the wet mixed powder fed to the extruder is adjusted based on an amount of mass change of the wet mixed powder stored in a reservoir provided between the continuous mixer and the belt feeder.

Method and device for producing ceramic formed body

A manufacturing method includes a mixing step, a kneading step of kneading a wet mixture, a liquid adding step of further adding a liquid to a kneaded material, a forming step of extruding a forming material of which viscosity is adjusted into a honeycomb formed body, a drying step of drying the honeycomb formed body, and a dimension measuring step of measuring a dry dimension of a honeycomb dried body that has been dried, where in the liquid adding step, the amount of the liquid to be added is adjusted based on the result of measuring the dry dimension of the honeycomb dried body.

Method of manufacturing ceramic structure

An electrode for electrical discharge machining which makes it possible to form slits of a honeycomb structure forming die so that a slit width on a front surface side is smaller than a slit width on a back hole side is provided. The electrode for electrical discharge machining includes: plural plate-shaped discharge portions with a thickness that is gradually increased toward tips thereof; and a plate-shaped support portion to which end portions of the plural discharge portions on a side opposite to the tips are connected, wherein a difference between a thickness of the tip; and a thickness of the end portion on the side opposite to the tip ranges from 5 &#x3bc;m to 500 &#x3bc;m in the discharge portion.

Electrode for electrical discharge machining and method for manufacturing honeycomb structure forming die

The cutting method of a honeycomb formed body includes an end face cutting step of cutting both end faces of the ceramic honeycomb formed body before fired, by use of blade type rough-cutting grinding wheels in which coarse abrasive grain layers are formed; a honeycomb formed body rotating step of rotating the honeycomb formed body round a rotation axis which is a central axis perpendicular to the end faces of the honeycomb formed body; and an end face finishing step of disposing two finish-polishing grinding wheels via a predetermined distance so that finishing abrasive grain layers formed in the finish-polishing grinding wheels face each other, rotating the finish-polishing grinding wheels round a rotary shaft which is a central shaft of the finish-polishing grinding wheels, and moving the honeycomb formed body to pass the honeycomb formed body between the two finish-polishing grinding wheels, thereby finish-polishing cut surfaces which are cut.

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Nagoya, Japan

Takuya Yamada