Title:
SPIRAL BLADE HAVING IMPROVED INJECTION MOLDABILITY AND SPIRAL BLADE UNIT HAVING THE SAME
Document Type and Number:
WIPO Patent Application WO/2020/060063
Kind Code:
A1
Abstract:
Disclosed is a spiral blade configured such that a spiral blade having a spiral plate portion formed on the outer peripheral surface of a divided shaft and having an excellent quality can be fabricated through injection molding without generating an undercut, thereby substantially improving the productivity of a spiral blade unit. The spiral blade includes: a root portion fixed to a rotating shaft; a spiral plate portion molded spirally and a partial shaft portion formed integrally along the root portion. The range of angle at which the root portion of the spiral plate portion is connected around an outer peripheral surface of the partial shaft portion is equal to or larger than a 240° range and is equal to or smaller than a 350° range.
Inventors:
BAEK JOON HO (KR)
MIEREMET MARINUS (KR)
YANG HEUNG GUEN (KR)
CHUN YONG JOO (KR)
KIM MYOUNG GON (KR)
MIEREMET MARINUS (KR)
YANG HEUNG GUEN (KR)
CHUN YONG JOO (KR)
KIM MYOUNG GON (KR)
Application Number:
PCT/KR2019/011056
Publication Date:
March 26, 2020
Filing Date:
August 29, 2019
Export Citation:
Assignee:
ESCO RTS CO LTD (KR)
International Classes:
F03D1/06
Foreign References:
| KR101513368B1 | 2015-04-17 | |||
| KR101592289B1 | 2016-02-11 | |||
| JPH05321894A | 1993-12-07 | |||
| KR101286380B1 | 2013-07-15 | |||
| KR101578745B1 | 2015-12-21 |
Attorney, Agent or Firm:
PARK, Hee Jin (KR)
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