Title:
PREFORMING METHOD FOR DOUBLE-BAG THERMAL DIAPHRAGM MADE OF COMPOSITE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2018/018803
Kind Code:
A1
Abstract:
Provided is a preforming method for a double-bag thermal diaphragm made of composite material. The method mainly relates to the technical field of composite material preforming. The method comprises: first, packaging a prepreg laying layer in double diaphragm bags consisting of an inner diaphragm bag and an outer diaphragm bag; and then, mounting the double diaphragm bags comprising the prepreg laying layer on a preforming device, and preforming the double-bag thermal diaphragm. During the preforming process of the double-bag thermal diaphragm, by controlling the pressure in the inner diaphragm bag and the pressure in the outer diaphragm bag, the normal pressure outside the surface of the prepreg laying layer is decreased zero, and the prepreg laying layer is preformed by using the preforming device, so as to prepare and obtain a preformed product of a composite material. In the method, the normal pressure outside the surface of the prepreg laying layer is decreased to zero, interlayer slipping of fiber laying layers is effectively promoted, defects such as fiber buckling and wrinkles are avoided, the control process of a double-diaphragm preforming technology is effectively simplified, and the existing preforming device does not need to be specially transformed.
Inventors:
XIN CHAOBO (CN)
WANG DONG (CN)
WANG DONG (CN)
Application Number:
PCT/CN2016/106551
Publication Date:
February 01, 2018
Filing Date:
November 21, 2016
Export Citation:
Assignee:
BEIJING AERONAUTICAL SCIENCE & TECH RESEARCH INSTITUTE COMMERCIAL AIRCRAFT CORPORATION OF CHINA (CN)
COMMERCIAL AIRCRAFT CORP CN (CN)
COMMERCIAL AIRCRAFT CORP CN (CN)
International Classes:
B29C70/44; B29C70/34; B29C70/54
Foreign References:
| CN205929503U | 2017-02-08 | |||
| CN104441697A | 2015-03-25 | |||
| CN102294831A | 2011-12-28 | |||
| US6017484A | 2000-01-25 | |||
| US5116216A | 1992-05-26 | |||
| US4407685A | 1983-10-04 |
Attorney, Agent or Firm:
BEIJING JINZHIPUHUA INTELLECTUAL PROPERTY AGENCY CO. LTD et al. (CN)
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