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Composite mold in modular design and application method of composite mold

A modular design, composite material technology, applied in the field of composite material molds, can solve the problems of difficult handling of molds for operators, heavy weight, troublesome vacuum bagging, etc., to reduce the risk of curing deformation, low density, and reduce differences. Effect

Pending Publication Date: 2019-03-22
BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If steel is used, the weight is very heavy, and it is difficult for the operator to carry it as a mold and it is troublesome to vacuum bag.

Method used

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  • Composite mold in modular design and application method of composite mold
  • Composite mold in modular design and application method of composite mold
  • Composite mold in modular design and application method of composite mold

Examples

Experimental program
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Effect test

preparation example Construction

[0055] The method for preparing a composite material box body using the above-mentioned composite material mold specifically includes the following steps:

[0056] Step 1: Design and prepare mold components according to the required composite material box, and set aside;

[0057] Step 2: Connect the bottom panel and several side panels together by using connecting angle pieces and bolts, and finally get the box mold;

[0058] Step 3: lay up the composite material according to the layup design;

[0059]Step 4: After the laying is completed, vacuum bag the entire box body, and the vacuum bag will completely surround the box body; when bagging, pay attention to put more air felt at the connecting corners to prevent the aluminum connecting corners from Vacuum bag puncture;

[0060] Step 5: Put it in a curing oven or an autoclave for curing;

[0061] Step 6: After curing, disassemble the vacuum bag and remove the bolts connecting the corner pieces;

[0062] Step 7: Remove the c...

Embodiment

[0072] DETAILED DESCRIPTION Taking a square box of 400mm×400mm×180mm as an example, its production and later use process will be described.

[0073] 1. Mold making

[0074] 1. Make 2 carbon fiber panels of 500mm*1000mm, the material can be plain 300 prepreg, and the layering method is [45 / 0 / 90 / 0 / 45]s. The curing method adopts hot pressing curing or vacuum bag curing. An upper panel 4 and a lower panel 8 of a sandwich structure are obtained.

[0075] 2. Take out a 500mm*1000mm aramid paper honeycomb piece with a thickness of 35mm. On the aramid paper honeycomb, draw the area that will be used to divide a bottom panel 1-1 and four side panels 1-2, namely the first side panel, the second side panel, the third side panel and the fourth side panel . And mark the position used to fill the aluminum connection block on each area to obtain the honeycomb structure 7 .

[0076] 3. According to the drawn position, dig out a 30mm×30mm square to the honeycomb structure 7. First put do...

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Abstract

The invention belongs to the technical field of composite structuring and forming, and particularly relates to a composite mold suitable for production of aircraft fuel tanks, automobile battery boxes, bathtubs, armored car square boxes and other container structures and an application method of the composite mold. The composite mold comprises a body part used for forming and a connector part usedfor being fixedly connected with the body part. The body part is formed by jointing multiple panel units made of light materials, and the panel units are connected and fixed through the connector part. In the body structure part of the composite mold, a honeycomb sandwich structure is adopted as a panel mold, the difference of thermal expansion coefficients between the mold and a to-be-formed composite is reduced, and the risk of curing deformation is reduced. The overall rigidity of the mold is guaranteed through the rigidity of the honeycomb sandwich structure, and therefore assembly convenience is provided through the large thickness and the low density. The overall density is quite low, and an operator can carry out carrying and bag breaking conveniently. The manufacturing process issimple, the raw material cost is low, and popularization is easy.

Description

technical field [0001] The invention belongs to the technical field of composite material construction and molding, and in particular relates to a composite material mold with a modular design suitable for the production of container structures such as aircraft fuel tanks, automobile battery boxes, bathtubs, and armored vehicle square boxes, and a method for using the same. Background technique [0002] With the further reduction in cost and performance improvement of composite materials such as carbon fiber and glass fiber, they are being more and more widely used in aerospace, automobile, wind power, rail transit and other industries. In these industries, the structure of the square box is a common structure, and they are usually used in automobile battery boxes, armored vehicle square boxes, etc. Since this kind of square box container is generally composed of at least 5 sides, in order to improve the integrity of the structure to maintain the continuity of the fiber to t...

Claims

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Application Information

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IPC IPC(8): B29C70/34B29C70/54B29C33/30B29C33/38
CPCB29C33/301B29C33/38B29C70/342B29C70/54
Inventor 原崇新董青海李妍潘杰刘亚男
Owner BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC
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