Title:
電池用封口板と前記封口板の製造方法及び製造金型
Document Type and Number:
Japanese Patent JP5623089
Kind Code:
B2
Abstract:
To enable to eliminate internal cracks, in molding a valve on a sealing plate with a thick plate as a base material.
Rising parts 13 from a valve part 12 molded into a thin film with the thick plate as a base material 11 are molded into a tapered shape. With this, as the valve part 12 is molded so as to be spread out; and metal flow moving in a lateral direction is changed in a lateral direction as well as a slanted upward direction (along the taper) by an excess thickness upper part spread out, whereby movement of the valve part (the thin-film part) 12 of the metal flow is made easy, and cracks at thick-plate molding are prevented by the smooth movement.
COPYRIGHT: (C)2011,JPO&INPIT
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Inventors:
藤井 啓
小田垣 敏弘
小田垣 敏弘
Application Number:
JP2010016966A
Publication Date:
November 12, 2014
Filing Date:
January 28, 2010
Export Citation:
Assignee:
冨士発條株式会社
International Classes:
H01M2/12; B21D22/02; B21D51/44; H01M2/04
Attorney, Agent or Firm:
Naoya Kamata
Bunji Kamata
Yaichiro Nakatani
Bunji Kamata
Yaichiro Nakatani