Vehicle body frame, die-cast product, mold for die-cast product and die-cast method

(19)

(11)

EP 1 792 674 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 A1)

(48)	Corrigendum issued on:
	15.08.2007 Bulletin 2007/33

(43)	Date of publication:
	06.06.2007 Bulletin 2007/23

(21)	Application number: 06023937.3

(22)	Date of filing: 17.11.2006

(51)

International Patent Classification (IPC):

B22C 9/06^(2006.01)

B22C 9/10^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA HR MK YU

(30)

Priority:

30.11.2005 JP 2005346018

(71)	Applicant: HONDA MOTOR CO., Ltd.
	Tokyo 107-8556 (JP)

(72)

Inventors:

Suzuki, Toshimitsu c/o Honda R&D Co., Ltd.
Wako-shi Saitama, 351-0193 (JP)
Seki, Yoshitaka c/o Honda R&D Co., Ltd.
Wako-shi Saitama, 351-0193 (JP)
Hariu, Jun c/o Honda R&D Co., Ltd.
Wako-shi Saitama, 351-0193 (JP)
Watanabe, Shin c/o Honda R&D Co., Ltd.
Wako-shi Saitama, 351-0193 (JP)
Ota, Koichi c/o Honda R&D Co., Ltd.
Wako-shi Saitama, 351-0193 (JP)
Hirayanagi, Satoshi c/o Honda R&D Co., Ltd.
Wako-shi Saitama, 351-0193 (JP)
Doi, Takashi c/o Honda R&D Co., Ltd.
Wako-shi Saitama, 351-0193 (JP)
Kurayoshi, Yoshiyuki c/o Honda R&D Co., Ltd.
Wako-shi Saitama, 351-0193 (JP)

(74)	Representative: Liska, Horst et al
	Weickmann & Weickmann Patentanwälte Postfach 86 08 20 81635 München 81635 München (DE)

(54)	Vehicle body frame, die-cast product, mold for die-cast product and die-cast method

(57) It is an object of the present invention to provide a vehicle body frame, a die-cast product, and a mold and a die-cast manufacturing method for the die-cast product which facilitates the measurement of the positional accuracy of splints, can decrease a clearance between the splint and the mold by increasing the dimensional accuracy of splint mounting portions of the mold based on sizes of the splints, and can manufacture the die-cast product of high dimensional accuracy.
According to the invention, in a mold for a die-cast product in which a main frame which is contiguously formed with a head pipe constitutes a portion of a hollow light-weight-metal-made vehicle-body frame, a core 20 which serves to form an inner space of the die-cast product includes a core body 21 and a plurality of splints 22 which is mounted on the core body 21 and have an approximately elliptical cross-sectional shape, and a long axis direction of an ellipse of the splint 22 is set parallel to a mold split surface of the mold.