Title:
【発明の名称】シリンダブロックの製造用金型装置及びシリンダブロック製造方法
Document Type and Number:
Japanese Patent JP2923453
Kind Code:
B2
Abstract:
A casting apparatus and method for producing a closed deck type cylinder block capable of facilitating removal of loose cores from the casted cylinder block. A die portion for forming a water jacket portion is formed with a plurality of notched portion having a bottom wall where a projection is provided. A pair of loose cores are fitted in each notched portion in such a manner that each parting face of the loose cores are in contact with each other. A first draft is provided at each loose cores and is mounted on the projection. In this case, the end of the parting face is placed on the projection. During casting, a molten metal is introduced into a space between the bottom wall and the first draft for forming a bridge portion. Upon solidification of the molten metal, the loose cores remain in the water jacket portion, and a bore is formed at the position corresponding to the projection. If a jig is inserted into the bore, the end of the jig abuts the parting face and pushes the pair of loose cores to move away from each other. Thus, the loose cores are offset from the bridge portion for removal of the loose core from the water jacket portion.
Inventors:
MIZUKUSA YASUYUKI
Application Number:
JP25565995A
Publication Date:
July 26, 1999
Filing Date:
September 07, 1995
Export Citation:
Assignee:
RYOOBI KK
International Classes:
F02F1/00; B22C9/06; B22C9/24; B22D17/00; B22D17/22; B22D19/08; B22D29/00; F02F1/10; (IPC1-7): B22C9/24; B22D17/22; B22D19/08; F02F1/00; F02F1/10
Domestic Patent References:
| JP6142834A |
Attorney, Agent or Firm:
Kazuhiro Kitazawa (1 outside)