A method for preparing a low-density heat-resistant composite material rotary body

Abstract

The invention relates to a method for preparing a low-density heat-resistant composite material revolving body. The method includes four steps: (1) mold clamping; (2) sol perfusion; (3) sol defoaming and (4) product molding. By coordinating the positional relationship between the glue storage device and the mould, the present invention realizes the optimized molding of low-density heat-resistant composite material revolving body parts; a high-precision low-pressure regulating valve (3) is installed on the air pressure pipeline to precisely control the foam discharge time The pressure in the mould; at the same time, the concept of gravity injection was introduced by using the principle of the connecting device, and an electronic platform scale (23) was arranged under the material tank (7) to fully monitor the injection speed; The relationship between the position and size of the glue port (11) and the glue outlet (18) realizes the full removal of gas, improves the internal quality of the low-density heat-resistant composite rotary body parts, improves the success rate of the rotary body parts, and reduces the Manufacturing cost of rotary parts.

Description

A kind of preparation method of low-density heat-proof composite material rotary body parts technical field The present invention relates to the low-density heat-proof composite material preparation field, especially relate to a kind of low-density heat-proof composite material Preparation method of rotary body parts. Background technique When the aircraft is flying at high speed in the atmosphere, a large amount of aerodynamic heat will be generated by squeezing and rubbing the air, so each All high-speed aircrafts face serious thermal barrier problems. If the external heat is not effectively managed and controlled, it will cause flight The device overheats or even burns out. Therefore, thermal protection materials are required to protect aircraft structures and internal equipment. As the most important ablation matrix material, resin-based thermal protection material has high specific strength and specific modulus, fatigue resistance, It has the characteristics...

AI Technical Summary

Problems solved by technology

[0004] The preforms of resin-based heat-resistant materials are mostly stitched, three-dimensional braided, and needle-punched structures, which generally have low density and are sensitive to pressure. Using conventional RTM methods, the preforms often have wrinkles and deformations. If the defects of the parts exceed a certain area, the parts will be scrapped, which will greatly reduce the success rate of the parts and increase the cost of the parts.

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