Title:
PIPE EXPANSION APPARATUS FOR EASY TUBE INSERTION, AND COMPOSITE PIPE MANUFACTURING METHOD USING SAME
Document Type and Number:
WIPO Patent Application WO/2023/038306
Kind Code:
A1
Abstract:
A pipe expansion apparatus according to the present invention is characterized in that a tube is easily inserted into an inner pipe due to being inserted in a state in which the outer diameter of the tube is reduced, and the inner pipe is easily inserted into an outer pipe due to being inserted while tightly fixed to the tube by expanding the tube after the tube is inserted into the inner pipe.
Inventors:
BANG MANHYUK (KR)
Application Number:
PCT/KR2022/011960
Publication Date:
March 16, 2023
Filing Date:
August 10, 2022
Export Citation:
Assignee:
KUMKANG CO LTD (KR)
International Classes:
B29C57/02; B29C57/04; B29C57/08; B29C65/02; B29D23/00
Foreign References:
| KR102051234B1 | 2019-12-02 | |||
| KR101059130B1 | 2011-08-25 | |||
| JP2020523542A | 2020-08-06 | |||
| KR20160085744A | 2016-07-18 | |||
| KR100781955B1 | 2007-12-06 |
Attorney, Agent or Firm:
CHA, Hyeong-Seog (KR)
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