Title:
MANUFACTURING METHOD FOR RESIN RETAINER HAVING TWO ANNULAR SECTIONS
Document Type and Number:
WIPO Patent Application WO/2021/070432
Kind Code:
A1
Abstract:
[Problem] To provide a method for manufacturing a resin retainer having two annular sections such that it is possible to suppress the deformation of the annular parts in the radial direction. [Solution] A fixed-side cavity formation mold 6 has a first axial-direction mold surface 6A abutting the axial-direction end face of one annular section of a resin retainer A having two annular sections, and has a first protrusion11A projecting from the first axial-direction mold surface 6A. A movable-side cavity formation mold 7 has a second axial-direction mold surface 7A abutting theaxial-direction end face of the other annular section of the retainer A, and has a second protrusion 12A projecting from the second axial-direction mold surface 7A. A slide core sliding step for sliding a slide core 8 radially outward and pulling out a pocket-forming projection of the slide core 8 from a pocket in the retainer A is carried out, after which a mold opening step for opening the movable-side cavity formation mold 7 with respect to the fixed-side cavity formation mold 6 is carried out.
Inventors:
TAKAGIWA SHINYA (JP)
FUKUDA OSAMU (JP)
FUKUDA OSAMU (JP)
Application Number:
PCT/JP2020/025517
Publication Date:
April 15, 2021
Filing Date:
June 29, 2020
Export Citation:
Assignee:
NAKANISHI METAL WORKS CO (JP)
International Classes:
B29C45/33; F16C33/38; F16C33/46
Foreign References:
| JP2017072206A | 2017-04-13 | |||
| JP2013160333A | 2013-08-19 | |||
| JP2005225032A | 2005-08-25 | |||
| JP2010110916A | 2010-05-20 | |||
| JP2019074097A | 2019-05-16 | |||
| JP3700780B2 | 2005-09-28 | |||
| JP2007198469A | 2007-08-09 | |||
| JP4793482B2 | 2011-10-12 | |||
| JP2014101946A | 2014-06-05 | |||
| JP2003311791A | 2003-11-05 |
Other References:
See also references of EP 4043178A4
Attorney, Agent or Firm:
YANAGINO Takao et al. (JP)
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