Title:
LOST PATTERN, METHOD FOR PRODUCING LOST PATTERN, AND METHOD FOR PRODUCING DIE USING LOST PATTERN
Document Type and Number:
WIPO Patent Application WO/2012/101827
Kind Code:
A1
Abstract:
A light-weight die exhibiting necessary rigidity is obtained. First, an original pattern for a lost pattern is produced by cutting a lump of a quenchable material. The original pattern is provided with: a three-dimensional reticule structure which has a plurality of bar members, and in which the connecting points where the ends of the bar members are connected are dispersed within a three-dimensional space; and a plurality of block members, the relative positional relationship of which being secured by means of the reticule structure. Subsequently, at least a section of some of the bar members forming the original pattern is removed and is replaced with a tube member. Then, a full mold casting process is performed by using the lost pattern in which a section of some of the bar members are replaced with the tube members as mentioned above. The positional relationship between the block members on which the necessary molding surfaces of a die are formed is secured by means of the three-dimensional reticule structure, thereby ensuring necessary rigidity. The weight of the die is reduced because a three-dimensional reticule structure is used. Moreover, the amount of gas produced during the full mold casting process is reduced and the quality of the cast is not impaired because a section of some of the bar members are replaced with tube members.
Inventors:
SUETA HIROTAKE (JP)
KAMEYAMA KIYOSHI (JP)
TAKEMOTO ATSUSHI (JP)
WATARAI TATUYA (JP)
AKIMOTO HITOSHI (JP)
YAMASHITA MASAKI (JP)
KAMEYAMA KIYOSHI (JP)
TAKEMOTO ATSUSHI (JP)
WATARAI TATUYA (JP)
AKIMOTO HITOSHI (JP)
YAMASHITA MASAKI (JP)
Application Number:
PCT/JP2011/051823
Publication Date:
August 02, 2012
Filing Date:
January 28, 2011
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
SUETA HIROTAKE (JP)
KAMEYAMA KIYOSHI (JP)
TAKEMOTO ATSUSHI (JP)
WATARAI TATUYA (JP)
AKIMOTO HITOSHI (JP)
YAMASHITA MASAKI (JP)
SUETA HIROTAKE (JP)
KAMEYAMA KIYOSHI (JP)
TAKEMOTO ATSUSHI (JP)
WATARAI TATUYA (JP)
AKIMOTO HITOSHI (JP)
YAMASHITA MASAKI (JP)
International Classes:
B21D37/02; B22C9/04; B21D37/20; B22C7/02
Foreign References:
| JPH02192844A | 1990-07-30 | |||
| JPS61266147A | 1986-11-25 | |||
| JP4553271B1 | 2010-09-29 |
Attorney, Agent or Firm:
KAI-U PATENT LAW FIRM (JP)
Patent business corporation KAI-U Patent Law Firm (JP)
Patent business corporation KAI-U Patent Law Firm (JP)
Download PDF:
Claims:
Previous Patent: PRESS FORMING DIES
Next Patent: COMPONENT FOR EVAPORATIVE PATTERN AND EVAPORATIVE PATTERN
Next Patent: COMPONENT FOR EVAPORATIVE PATTERN AND EVAPORATIVE PATTERN