Method for manufacturing ceramic formed body, and apparatus for manufacturing ceramic formed body

Patent metadata

Field	Value
Publication number	US-2016288367-A1
Application number	US-201615080873-A
Country	US
Kind code	A1
Filing date	Mar 25, 2016
Priority date	Mar 31, 2015
Publication date	Oct 6, 2016
Grant date	—

Abstract

A manufacturing method includes: a dry mixing step of dry mixing a raw material by batch processing; a wet mixing step of adding liquid to a dry mixture obtained at the dry mixing step, the liquid including at least one type of water, surfactant, lubricant and plasticizer, while wet mixing; a kneading step of kneading a wet mixture obtained at the wet mixing step; and a forming step of extruding a kneaded mixture (forming raw material) obtained at the kneading step to make a ceramic formed body. In the kneading step, the liquid is further added during kneading of the wet mixture.

First claim

What is claimed is:

1 . A method for manufacturing a ceramic formed body, comprising:
a dry mixing step of dry mixing a raw material to make the ceramic formed body by batch processing; a wet mixing step of adding liquid to a dry mixture obtained at the dry mixing step, the liquid including at least one type of water, surfactant, lubricant and plasticizer, while wet mixing; a kneading step of kneading a wet mixture obtained at the wet mixing step; and a forming step of extruding a forming raw material obtained at the kneading step, wherein in the kneading step, the liquid is further added during kneading of the wet mixture.

2 . The method for manufacturing a ceramic formed body according to claim 1 , wherein an amount of the liquid added at the wet mixing step is 60 to 90 mass % with respect to a total additive amount of the liquid added at the wet mixing step and the kneading step.

3 . The method for manufacturing a ceramic formed body according to claim 1 , further comprising a formed body shape measuring step of measuring a shape of the ceramic formed body made by the forming step immediately after extrusion, wherein
the amount of the liquid added at any one of the wet mixing step and the kneading step is adjusted based on the shape of the formed body measured.

4 . The method for manufacturing a ceramic formed body according to claim 1 , wherein the kneading step and the forming step are performed continuously and integrally.

5 . A ceramic formed body manufacturing apparatus, comprising:
a dry mixing unit that dry-mixes a raw material to make a ceramic formed body by batch processing; a wet mixing unit that adds liquid to a dry mixture mixed by the dry mixing unit, the liquid including at least one type of water, surfactant, lubricant and plasticizer, and performs wet mixing; a kneading unit that kneads a wet mixture mixed by the wet mixing unit; and an extrusion unit that extrudes a forming raw material kneaded by the kneading unit, wherein the kneading unit further adds the liquid during kneading of the wet mixture.

6 . The ceramic formed body manufacturing apparatus according to claim 5 , wherein an amount of the liquid added by the wet mixing unit is 60 to 90 mass % with respect to a total additive amount of the liquid added by the wet mixing unit and the kneading unit.

7 . The ceramic formed body manufacturing apparatus according to claim 5 , further comprising a formed body shape measuring unit that measures a shape of the ceramic formed body made by the extrusion unit immediately after extrusion, wherein
the amount of the liquid added by any one of the wet mixing unit and the kneading unit is adjusted based on the shape of the formed body measured.

8 . The ceramic formed body manufacturing apparatus according to claim 5 , wherein the kneading unit and the extrusion unit are configured continuously and integrally.

Assignees

• Ngk Insulators Ltd

Inventors

• Tajima Yuichi
• Okumura Kensuke
• Hayashi Seiichiro

Classifications

• C04B38/0009

  characterised by features relating to the cell walls, e.g. wall thickness or distribution of pores in the walls · CPC title

• B28C3/00

  Apparatus or methods for mixing clay with other substances (producing clay suspensions B28C1/02) · CPC title

• B28B17/0081

  Process control · CPC title

• C04B2235/6021

  Extrusion moulding · CPC title

• B28B17/026 Primary

  Conditioning ceramic materials · CPC title