Title:
CORE FOR MOLD
Document Type and Number:
Japanese Patent JP2020163396
Kind Code:
A
Abstract:
To provide a core for a mold in which the fatigue breakdown of a projection part can be hard to occur.SOLUTION: A core for a mold comprises: an installation part installed to a mold having an edge face facing the cavity of a mold; and a projection part projected from a part of the edge face. The installation part and the projection part include: an elastic part formed at a region including a corner in which the outer surface of the projection part and the edge face are crossed; and a body as a part other than the elastic part, and the elastic limit of the elastic part is higher than the elastic limit of the body. In this way, the plastic deformation in the vicinity of the corner in which stress is easy to be concentrated can be made hard to occur, the fatigue breakdown of the projection part caused by the repeat of the plastic deformation in the vicinity of the corner can be suppressed.SELECTED DRAWING: Figure 1
Inventors:
KOMAKI SHIGEYOSHI
Application Number:
JP2019063831A
Publication Date:
October 08, 2020
Filing Date:
March 28, 2019
Export Citation:
Assignee:
AHRESTY CORP
International Classes:
B22C9/10; B22C9/06; B22D17/22; B22D18/04; B22D18/06; B29C33/14; B29C33/76
Domestic Patent References:
| JPH1177764A | 1999-03-23 | |||
| JP2005334961A | 2005-12-08 | |||
| JPH0539715A | 1993-02-19 | |||
| JP2006043772A | 2006-02-16 |
Attorney, Agent or Firm:
Patent Service Corporation Shinmei Century