Uniform temperature distribution method and curing device for microwave-pressure curing composite material

A composite material and uniform distribution technology, which is applied in the field of composite material curing and forming, can solve the problems of high energy consumption, poor uniformity, and low heating efficiency, and achieve the effect of improving temperature uniformity, eliminating heating unevenness, and ensuring quality

CN104139532BActive Publication Date: 2016-08-31NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-08-31

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Abstract

The invention discloses a uniform temperature distribution method and a complete set of curing device for a microwave-pressure curing composite material. The method is characterized in that a polygon cavity is used in a pressure container tank, so that the microwave can be reflected for multiple times in the cavity and the uniformity of the microwave entering the composite material is improved; meanwhile, waveguide windows are formed in the front and the back of the cavity, so that a gas medium can flow into the cavity and carry out convection heat transfer with the composite; the temperature uniformity of the material can be further improved; and the pressure is applied by the air in the pressure container when the composite material is heated and cured. The device mainly comprises a polygon cavity and an electromagnetic shielding window. Through the uniform temperature distribution method and the curing device for the microwave-pressure curing composite, the temperature uniformity of a composite part can be improved, and the buckling deformation of the composite material cured by the microwave can be reduced.
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Description

technical field

[0001] The invention relates to a composite material solidification and forming technology, in particular to a technology for rapidly solidifying and forming a composite material by using microwave heating, in particular to a microwave-pressure curing composite material uniform temperature distribution method and a complete set of curing device. Background technique

[0002] As we all know, fiber-reinforced resin-based composites have the advantages of high specific strength and specific stiffness, light weight, corrosion resistance, and fatigue resistance, and have been widely used.

[0003] Microwave heating and curing technology uses low-frequency electromagnetic waves to penetrate materials, convert microwave energy into heat energy, and uniformly heat the inside and outside of materials. Microwave heating and curing has the characteristics of short production time, easy temperature control, and low energy consumption. It is suitable for forming large-sca...

Examples

Embodiment 1

[0027] Such as Figure 1-3 shown.

[0028] A method for uniform temperature distribution of microwave-pressure curing composite materials. Firstly, the composite material member 14 is placed in the curing cavity 9, so that the microwave energy is incident on the surface of the composite material member 14 after multiple reflections in the curing cavity 9 and Inside; at the same time, the gas pressure is provided through the pressure vessel and then applied to the surface of the composite material to compact the material; when there is a temperature difference (generally 5°C-10°C) in the measured temperature of the composite member 14, heating or cooling the pressure vessel 1 The gas medium is circulated through the electromagnetic shielding ventilation window provided on the curing chamber 9, and convective heat exchange occurs with the composite material, so as to improve the temperature uniformity of the composite material member 14.

Embodiment 2

[0030] A microwave-pressure composite curing device with uniform temperature distribution, which includes a pressure vessel 1, a curing chamber 9 installed in the pressure vessel 1, a vacuum generating device and a microwave generating device, such as figure 1 As shown, the vacuum generating device passes through the pressure vessel 1 and the curing chamber 9 through the vacuum tube 8 and communicates with the vacuum bag 15 of the rotating composite material member 14, and the microwave generated by the microwave generating device is sent into the curing chamber 9 through the microwave transmission line 7, The vacuum bag 15 is installed on the mold 13, the mold 13 is installed on the stage 12, the stage 12 is installed on the guide rail 11, and the guide rail 11 is installed in the curing cavity 9, the cavity cross section of the curing cavity 9 It is a polygonal structure that can reflect microwaves multiple times, among which the hexagon is the best, and it can also be in sha...