Title:
PIPE SHRINKING DIE AND HOT PIPE
Document Type and Number:
WIPO Patent Application WO/2022/120950
Kind Code:
A1
Abstract:
A pipe shrinking die (10) and a hot pipe (20), the pipe shrinking die (10) being used for shrinking the hot pipe (20). The pipe shrinking die (10) comprises: a fixed die (11), which is provided with a first end (101) and a second end (102) which are oppositely arranged, the first end (101) being provided with a first counterbore (111), the second end (102) being provided with a second counterbore (112), and the second counterbore (112) communicating with the first counterbore (111) by means of a first channel (113); a die core (12), which is fixed within the first counterbore (111), the die core (12) being provided with a second channel (120) which communicates with the first channel (113) and the diameter of which gradually decreases along the direction of the first end (101) pointing to the second end (102); and a guide pin (13), which is fixed within the fixed die (11). The axes of the first counterbore (111), the second counterbore (112), the first channel (113) and the second channel (120) along the axial direction of the first end (101) pointing to the second end (102) are co-linear.
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Inventors:
YU YONGSHUI (CN)
Application Number:
PCT/CN2020/138486
Publication Date:
June 16, 2022
Filing Date:
December 23, 2020
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECH NANJING CO LTD (CN)
AAC TECH NANJING CO LTD (CN)
International Classes:
F28D15/02; B21D37/10
Foreign References:
| CN210188276U | 2020-03-27 | |||
| CN105517722A | 2016-04-20 | |||
| CN203917673U | 2014-11-05 | |||
| CN1781621A | 2006-06-07 | |||
| CN204953710U | 2016-01-13 | |||
| CN106064180A | 2016-11-02 | |||
| CN1524640A | 2004-09-01 | |||
| US5311661A | 1994-05-17 | |||
| US3789650A | 1974-02-05 |
Attorney, Agent or Firm:
PURPLEVINE INTELLECTUAL PROPERTY (SHENZHEN) CO., LTD. (CN)
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