Title:
METHOD FOR MANUFACTURING PAINLESS INJECTION NEEDLE, AND PAINLESS INJECTION NEEDLE
Document Type and Number:
WIPO Patent Application WO/2021/241776
Kind Code:
A1
Abstract:
The present invention relates to a method for manufacturing a painless injection needle that manufactures a painless injection needle having an outer diameter of 0.2 mm or less by means of a progressive stamping die process and a plating process, and to a painless injection needle manufactured by same method. The method for manufacturing the painless injection needle of the present invention comprises the steps of: (a) making a tip end into a pointed plate by primary provisional notching that cuts out the shape from the edge of a thin plate; (b) performing forging processing on the primary provisionally notched plate so as to thin the thickness of the plate and, at the same time, increasing the strength by work hardening; (c) performing secondary main notching that cuts out the shape from the area enlarged by the forging processing in step (b) to an original dimension; (d) chamfering a sharp tapered part of the sharp tip end cut by the secondary main notching in step (c), and rounding same; and (e) forming the chamfered plate into a cylindrical shape.
Inventors:
KIM GYEONG DO (KR)
Application Number:
PCT/KR2020/006874
Publication Date:
December 02, 2021
Filing Date:
May 28, 2020
Export Citation:
Assignee:
SPIN CO LTD (KR)
KIM GYEONG DO (KR)
KIM GYEONG DO (KR)
International Classes:
B21G1/00; A61M5/315; A61M5/32; B21G1/08; B21G1/12; C25D5/14; C25D5/36; C25D11/02
Foreign References:
| JP2015147042A | 2015-08-20 | |||
| JP2019166290A | 2019-10-03 | |||
| US20110160612A1 | 2011-06-30 | |||
| KR20130114620A | 2013-10-18 | |||
| JP2001054573A | 2001-02-27 | |||
| KR102165489B1 | 2020-11-05 |
Attorney, Agent or Firm:
PARK, Hyeong Keun (KR)
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