Die-casting method and die-casting apparatus

(19)

(11)

EP 1 249 289 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	05.03.2003 Bulletin 2003/10

(43)	Date of publication A2:
	16.10.2002 Bulletin 2002/42

(21)	Application number: 02008010.7

(22)	Date of filing: 10.04.2002

(51)	International Patent Classification (IPC)⁷: B22D 17/22, B22D 17/24, B22D 17/20

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

11.04.2001 JP 2001112310

(71)	Applicant: Kabushiki Kaisha Toyota Jidoshokki
	Kariya-shi, Aichi-ken (JP)

(72)	Inventors:
	Hiramatsu, Osamu, c/oK.K. Toyota Jidoshokki Kariya-shi, Aichi-ken (JP) Kawaguchi, Masahiro, c/oK.K. Toyota Jidoshokki Kariya-shi, Aichi-ken (JP) Ota, Masaki, c/oK.K. Toyota Jidoshokki Kariya-shi, Aichi-ken (JP) Ito, Masafumi, c/oK.K. Toyota Jidoshokki Kariya-shi, Aichi-ken (JP) Yoshida, Yoshiharu, c/oK.K. Toyota Jidoshokki Kariya-shi, Aichi-ken (JP)

(74)	Representative: Leson, Thomas Johannes Alois, Dipl.-Ing.
	Tiedtke-Bühling-Kinne & Partner GbR, TBK-Patent, Bavariaring 4 80336 München 80336 München (DE)

(54)	Die-casting method and die-casting apparatus

(57) A method of die-casting a die-cast article (220, 426) having at least one of an inner circumferential surface and an outer circumferential surface, whose cross sectional shape is a circle, the die-casting article being formed with a die-casting apparatus having a mold cavity (236, 430) therein and a molding portion (250; 410) for forming one of the inner and outer circumferential surfaces of the die-cast article, the method being characterized by comprising the steps of: introducing a molten metal into the mold cavity; and separating the die-cast article and the molding portion from each other while the die-cast article and the molding portion are rotated relative to each other, after the molten metal has solidified into the die-cast article. A die-casting apparatus for practicing the method is also disclosed.

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