Apparatus for refining moldable batch bodies and method of molding ceramic bodies by using the apparatus

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EP 0 364 205 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	05.12.1990 Bulletin 1990/49

(43)	Date of publication A2:
	18.04.1990 Bulletin 1990/16

(21)	Application number: 89310335.8

(22)	Date of filing: 10.10.1989

(51)	International Patent Classification (IPC)⁵: B28B 17/02, B28B 3/24

(84)	Designated Contracting States:
	BE CH DE GB LI SE

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Priority:

11.10.1988 JP 253836/88

(71)	Applicant: NGK INSULATORS, LTD.
	Nagoya City Aichi Pref. (JP)

(72)	Inventors:
	Kato, Kiminari 1-302, Town Denjiyama, 1-2 Nagoya City Aichi Pref. (JP) Tanaka, Kenichi 48-2, Aza-Ohyashiki Chita-gun Aichi Pref. (JP)

(74)	Representative: Paget, Hugh Charles Edward et al
	MEWBURN ELLIS York House 23 Kingsway London WC2B 6HP London WC2B 6HP (GB)

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References cited: :

(54)	Apparatus for refining moldable batch bodies and method of molding ceramic bodies by using the apparatus

(57) An apparatus for refining moldable ceramic batch bodies is provided within a molding cylinder (1) upstream of a molding die (8). The refining apparatus comprises a screen (2) and a screen supporting perforated plate (3) having a plurality of body passages (9) therethrough. To avoid inclusion of air in the molded product due to separation of the noodles emerging from the perforated plate (3), each body passage (9) is tapered to diverge towards the body chamber (5) defined between the molding die (8) and the perforated plate (3). Thereby the noodles extruded through the passages (9) are urged towards each other by a component of force in the direction perpendicular to the extrusion direction.

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