Title:
SURFACE MATERIAL OF MOLD MOLDING SURFACE AND SURFACE TREATMENT METHOD OF MOLD MOLDING SURFACE
Document Type and Number:
WIPO Patent Application WO/2019/234951
Kind Code:
A1
Abstract:
Provided are a surface material of a mold molding surface and a surface treatment method for obtaining the surface material which can achieve high hardness, improvement in corrosion resistance, and improvement in mold releasability of a mold surface with a relatively simple method of injecting powder or the like. At least a molding surface of a mold that is formed of metal or from a material including metal and in which the molding surface reaches 50°C or higher during molding is subjected to rapid thermal processing by injecting a substantially spherical shot which has a hardness that is equal to or greater than the surface hardness of the mold and has a size of #220 (JIS R6001-1973) or smaller at an injection pressure of 0.2 MPa or more and bombarding the molding surface with the shot, causing the temperature to rise locally and instantaneously at a bombarded portion to refine the surface structure of the molding surface and to form numerous smooth arc-shaped indentations on the entire surface of the molding surface. Then, powder comprising titanium or titanium alloy having a size of #100 (JIS R6001-1973) or smaller is injected at an injection pressure of 0.2 MPa or more to form a coating of titanium oxide on the surface of the molding surface.
Inventors:
MIYASAKA YOSHIO (JP)
Application Number:
PCT/JP2018/043619
Publication Date:
December 12, 2019
Filing Date:
November 27, 2018
Export Citation:
Assignee:
FUJI KIHAN CO LTD (JP)
International Classes:
B29C33/42
Foreign References:
| JP2015513606A | 2015-05-14 | |||
| JP2008307735A | 2008-12-25 | |||
| JPH11270005A | 1999-10-05 | |||
| JP3150048U | 2009-04-30 |
Other References:
See also references of EP 3804936A4
Attorney, Agent or Firm:
OGURA & CO. (JP)
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