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Patent Searching and Data


Title:
DEMOLDING MECHANISM FOR DRAWING DIE FOR METAL HOLLOW BODY
Document Type and Number:
WIPO Patent Application WO/2020/238460
Kind Code:
A1
Abstract:
Disclosed in the present application is a demolding mechanism for a drawing die for a metal hollow body. A seat body is provided internally with an elastic ring and a mechanism which transfers an axial stress to a radial displacement; a yielding hole is provided in the elastic ring, and the yielding hole is in dynamic friction fit with a punch; and a passing channel for the punch is formed in the middle of the mechanism which transfers an axial stress to a radial displacement, such that when the punch moves downwards in an axial direction, the passing channel expands in a radial direction, and when the punch moves upwards in the axial direction, the passing channel contracts in the radial direction. The present application is ingenious in structural design. Abrasion to the demolding mechanism in a demolding process is greatly reduced, and in addition, a sufficient demolding force can be guaranteed, while the surface of a product will not be scratched. Therefore, the present application has a prominent substantive effect and represents notable progress.

Inventors:
AN SHU (CN)
GU HAIJU (CN)
WANG YANG (CN)
Application Number:
PCT/CN2020/085120
Publication Date:
December 03, 2020
Filing Date:
April 16, 2020
Export Citation:
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Assignee:
SUZHOU SLAC PREC EQUIPMENT CO LTD (CN)
International Classes:
B21D45/08; B21D51/26
Foreign References:
CN110216213A2019-09-10
CN210358966U2020-04-21
CN204135097U2015-02-04
CN207629004U2018-07-20
CN107321834A2017-11-07
CN2327469Y1999-07-07
GB330704A1930-06-19
JPH04361834A1992-12-15
Attorney, Agent or Firm:
NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY(SPECIAL GENERAL PARTNERSHIP) (CN)
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