Apparatus and method for preparing folded core material
A folding core and mold technology, applied in the field of composite materials, can solve the problems of expensive manufacturing and maintenance costs, uncontrollable, and many manufacturing defects
Inactive Publication Date: 2015-06-03
SHANGHAI JIAO TONG UNIV
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Problems solved by technology
However, this method requires complex equipment, expensive manufacturing and maintenance costs, and there is a certain in-plane tensile deformation of the folded material during the folding process. If fiber materials are used, it may cause local fiber breakage, which introduces Many manufacturing defects and uncontrollable
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Embodiment 1
[0035] In this embodiment, the present invention will be further described below by taking the manufacture of a folded core material based on Miura Pattern as an example.
[0036] The manufacturing process of the folded core material in this embodiment is as follows:
[0037] Step 1: Install the first main mold unit 1 on the through hole 13 in the upper right corner of the bottom plate 12, as shown in FIG. 7 .
[0038] Step 2. Cover the part of the prepreg to be folded on the first main mold unit 1, connect the air suction port 7 of the main mold unit 1 with a vacuum pump, and pump air through the air suction port 7 through the upper surface 2 The openings 3 on the upper surface absorb the prepreg on the upper surface 2 of the main mold unit 1 .
[0039] Step 3, buckle the first secondary mold unit 8 on the main mold unit 1, as Figure 7b As shown, thereby compacting and fixing the folded part of the prepreg.
[0040] Step 4, the second main mold unit 1 is installed on the ...
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The present invention discloses an apparatus and a method for preparing a folded core material. The method comprises: 1, fixing a main mold unit on a bottom plate, and coating a prepreg on the corrugated upper surface of the main mold unit; 2, carrying out gas suction on the gas suction port of the main mold unit through a gas suction device arranged below the bottom plate so as to adsorb the prepreg on the upper surface of the main mold unit; 3, pressing a sub-mold unit above the main mold unit so as to compact and fix the folded part of the prepreg, such that a repeating unit is prepared; and 4, repeatedly performing the steps 1-3 until achieving the required folded core material area, and co-curing the prepreg, the main mold unit and the sub-mold unit, wherein the folded core material is obtained after completing the curing. According to the present invention, the main mold unit and the sub-mold unit comprise the repeating units, and the required equipment is simple; the main mold unit and the sub-mold unit can be printed through the 3D printer, such that the apparatus and the method are suitable for the folded core material having the complex geometry; and according to the requirement, the number of the mold units can be increased or decreased so as to achieve the manufacture of any area of the folded core.
Description
technical field [0001] The invention relates to a method in the technical field of composite materials, in particular to a device and method for preparing a folded core material. Background technique [0002] As an advanced composite material, the sandwich structure based on the folded core material has comprehensive performance comparable to that of the honeycomb sandwich structure, and at the same time, it can overcome the common shortcomings of the honeycomb sandwich structure due to the accumulation of condensed water in the closed cells, resulting in performance degradation. Therefore, the folded core sandwich structure has been widely studied in the field of aerospace as a new type of efficient and lightweight composite material. The main material of the body. The manufacturing technology of the folded core material is an important issue that must be solved in the research stage and before the industrial application of this new composite material. At present, the man...
Claims
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IPC IPC(8): B29C70/46
CPCB29C70/46
Inventor 周翔Y·衷汪海
Owner SHANGHAI JIAO TONG UNIV