Preparation method for low-density heat-proof composite material rotation solid workpiece

Abstract

The invention relates to a preparation method for a low-density heat-proof composite material rotation solid workpiece. The preparation method comprises the steps of (1) mold closing, (2) sol filling,(3) sol bubble removing, and (4) product forming. According to the preparation method, by coordinating the position relation between a sol storage device and a mold, optimization forming of the low-density heat-proof composite material rotation solid workpiece is achieved; an air compression pipeline is provided with a high-precision low-pressure adjusting valve (3), and the pressure in the moldduring bubble removing is precisely controlled; meanwhile, through the theory of communicating vessels, the gravity sol filling concept is introduced, an electronic platform scale (23) is arranged under a charging bucket (7), and the sol filling speed is sufficiently monitored; and moreover, the position relation and the size position between a sol inlet (11) and a sol outlet (18) are optimized, sufficient gas exhausting is achieved, the inner quality of the low-density heat-proof composite material rotation solid workpiece is improved, the success rate of the rotation solid workpiece is increased, and the manufacturing cost of the rotation solid workpiece is reduced.

Description

technical field [0001] The invention relates to the field of preparation of low-density heat-resistant composite materials, in particular to a method for preparing a low-density heat-resistant composite rotary body component. Background technique [0002] When the aircraft is flying at high speed in the atmosphere, it will squeeze and rub against the air to generate a large amount of aerodynamic heat, so all kinds of high-speed aircraft are facing serious thermal barrier problems. If the external heat is not effectively managed and controlled, it will cause the aircraft to overheat or even burn out. Therefore, thermal protection materials are needed to protect the aircraft structure and internal equipment. [0003] As the most important ablation matrix material, resin-based thermal protection materials have the characteristics of high specific strength and specific modulus, fatigue resistance, corrosion resistance, strong designability, easy large-area integral molding and ...

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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