A kind of composite material grid product and preparation method thereof

A composite material and grid technology, applied in the coating and other directions, can solve the problems of poor uniformity and poor heat resistance, and achieve the effect of uniform strength, continuity, and comprehensive performance.

Active Publication Date: 2022-06-21
北京玻钢院复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a composite material grid product and its preparation method to solve the problems of poor bearing strength, poor uniformity and poor heat resistance of the product obtained by the molding method of the composite material grid product in the prior art question

Method used

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  • A kind of composite material grid product and preparation method thereof
  • A kind of composite material grid product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The method for preparing a composite grid product described in this embodiment includes the following steps:

[0035] S0a. According to the load-bearing requirements of the product, the paving design is carried out according to the stress situation. In this embodiment, the product is as follows figure 1 The grid shown has a support structure at the edges for the paving design;

[0036] S0b. Design the mold according to the structure of the product. When designing the mold, consider the size and material of the mold, the structure of the product, the shear edge during pressing, the guide column, the temperature field, the mold release method, etc.; the mold material should be guaranteed to be able to It can withstand high temperature and high pressure for a long time without deformation, and has good wear resistance and high surface finish; the length of the shearing edge is generally about 1mm, and it is easy to tear if it is too long; The sleeve has a certain clearanc...

Embodiment 2

[0044] In the method for preparing a composite grid product described in this embodiment, the remaining steps are the same as those in Embodiment 1, the difference is that in step S5, the mold is forcibly cooled to below 60° C. and demolded.

Embodiment 3

[0046] In the method for preparing composite grid products described in this example, the remaining steps are the same as those in Example 1, the difference is that in step S4, the temperature rise rate is not controlled, and the temperature is directly raised to 160°C, and the holding time remains unchanged.

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Abstract

The invention provides a composite material grid product and a preparation method thereof. The preparation method includes the following steps: S1, making high-strength fibers and ablation-resistant fibers into chopped fibers and mixing them, and then mixing them with resin materials to obtain a premix ; S2. Mix high-strength fibers with ablation-resistant fibers, impregnate resin materials, and then cut fibers into required lengths to obtain prepregs; S3. Install the mold and fill the mold with the premixed material in step S1 according to the paving design and the prepreg in step S2; S4. Curing and molding the material in step S3 to obtain a composite grid product. The composite material grid product and the preparation method thereof of the present invention can solve the technical problems of poor bearing strength, poor uniformity and poor heat resistance of the product obtained by the molding method of the composite material grid product in the prior art.

Description

technical field [0001] The invention belongs to the technical field of composite material molding, and in particular, the invention relates to a composite material grid product and a preparation method thereof. Background technique [0002] In the prior art, the products obtained by the molding method of composite grid products have poor heat resistance, low strength, low density and poor uniformity. For example, Chinese patent document CN10508255A discloses a method for manufacturing a grid, first laying fiber prepreg in a mold, then injecting resin into a closed space formed by the mold, curing in the mold, and finally demoulding. During the resin injection and resin curing process, the resin is not evenly distributed in the mold due to its own gravity, and some positions even have gaps with the mold, and the injected resin makes the product denser. Therefore, when it is necessary to form grid products with higher requirements on bearing strength and uniformity, the requi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/30B29C70/54B29B15/12
CPCB29C70/30B29C70/54B29B15/12
Inventor 张薇宋寒刘建叶陈阳陈娜邢宽
Owner 北京玻钢院复合材料有限公司
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