Title:
MASTER CYLINDER MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2021/101102
Kind Code:
A1
Abstract:
A master cylinder manufacturing method is provided. The present invention comprises the steps of: molding an inner body which has an open inner hole at one end thereof and a protrusion portion at the other closed end thereof; disposing the inner body in the cavity of a mold formed by assembling a body mold in which the inner body is disposed to a cover mold sealing the open end of the inner body, the body mold having a fixing groove into which the protrusion portion is correspondingly inserted; pouring a molten material into the cavity to mold an outer body which is integrated with the inner body while entirely covering the outer surface of the inner body; and separating a cylinder body having the inner body and the outer body integrated with each other from the mold and post-processing the cylinder body.
Inventors:
SO YOON SUB (KR)
SEO DONG YOUNG (KR)
LEE SEUNG HYUN (KR)
SEO DONG YOUNG (KR)
LEE SEUNG HYUN (KR)
Application Number:
PCT/KR2020/014717
Publication Date:
May 27, 2021
Filing Date:
October 27, 2020
Export Citation:
Assignee:
PYONG HWA VALEO CO LTD (KR)
DOSYS CO LTD (KR)
DOSYS CO LTD (KR)
International Classes:
B22D19/00; B60T11/16
Foreign References:
| KR20170122993A | 2017-11-07 | |||
| JP2002339794A | 2002-11-27 | |||
| JP2007260687A | 2007-10-11 | |||
| KR20180091162A | 2018-08-16 | |||
| US20160089716A1 | 2016-03-31 | |||
| KR101442662B1 | 2014-09-23 | |||
| KR100833280B1 | 2008-05-28 | |||
| KR100407836B1 | 2003-12-01 | |||
| KR20150075869A | 2015-07-06 |
Attorney, Agent or Firm:
ERUUM & LEEON INTELLECTUAL PROPERTY LAW FIRM (KR)
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