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Microwave curing device for composite material and curing method thereof

A composite material and microwave curing technology is applied in the field of microwave curing devices for composite materials, which can solve the problems of uneven heating of components and ablation of heating efficiency.

Active Publication Date: 2020-11-17
SHENYANG LIGONG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the microwave heating method also has disadvantages. The unevenness of the microwave electromagnetic field can easily lead to uneven heating of the components, and the high heating efficiency can easily cause local ablation. Changes, the heating speed and temperature cannot be directly controlled linearly, and it is necessary to rely on temperature sensors to monitor and control the heating process in real time

Method used

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  • Microwave curing device for composite material and curing method thereof
  • Microwave curing device for composite material and curing method thereof

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Embodiment 1

[0048] In the following embodiments, the curing material is epoxy resin as an example to illustrate the curing process.

[0049] A microwave curing device for composite materials, the schematic diagram of its overall structure is shown in figure 1 As shown, the internal structure diagram is shown in figure 2 As shown, it includes components such as microwave magnetron 9, microwave cavity 4, storage table 1, magnetron controller, infrared thermal imager 2, vacuum positive and negative pressure bags, and indirect detection device. The microwave cavity 4 is positive 6-sided microwave cavity, in which:

[0050] The storage table is placed in the center of the microwave cavity 4;

[0051] The microwave cavity 4 adopts a double-layer structure, specifically including an inner shell and an outer shell 5, so as to restrain the microwave electromagnetic field to prevent leakage of microwave radiation, facilitate installation and protect the microwave magnetron 9, and the regular hex...

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Abstract

The invention discloses a microwave curing device for a composite material and a curing method thereof. The microwave curing device structurally comprises microwave magnetrons, a microwave cavity, a storage table, a magnetron controller, an infrared thermal imager, a vacuum positive and negative pressure bag and an indirect detection device. The microwave cavity is a regular n-polygon microwave cavity, n is equal to 6 or 8, and the storage table is placed in the center of the microwave cavity. The microwave cavity is of a double-layer structure and specifically comprises an inner shell and anouter shell. During curing, a composite material sample is placed on the surface of the storage table, and after a bin door is closed, the microwave magnetrons are started for sequential or symmetrical grouping heating; and after the sample is heated to the glass transition temperature at a constant speed, heating continues to be carried out until the temperature of the sample reaches Tg + 5 DEG C, the temperature of Tg + 5 DEG C is fixed for heating continuously until the temperature of the sample begins to drop, curing reaction is finished, and heating by the microwave magnetrons is stopped.A uniform microwave electromagnetic field can be obtained more easily, instantaneous uniformity is replaced with uniformity in a period, and the method is superior to a traditional microwave heatingmode that the curing speed is unbalanced.

Description

Technical field: [0001] The invention is used in the field of solidification and molding of composite materials, and in particular relates to a microwave curing device for composite materials and a curing method thereof. Background technique: [0002] At present, with the increasing demand for lightweight high-performance materials in the aerospace industry and the demand for improved product production efficiency in civilian use, a new production process for composite materials that can meet efficiency, cost, and performance has become more solid. base of needs. [0003] In the traditional process, the autoclave technology is mainly used to cure the thermosetting resin-based composite material, which requires a long time and high temperature thermal curing process, which has high energy consumption, low production efficiency, and high cost of the autoclave. question. At the same time, when the autoclave technology heating method heats the resin-based material, because of ...

Claims

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Application Information

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IPC IPC(8): B29C35/08
CPCB29C35/0805B29C2035/0855
Inventor 赵海涛李雪寒赵晖王余莲
Owner SHENYANG LIGONG UNIV
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