Manufacturing method of carbon fiber composite material exhaust pipe

Abstract

A manufacturing method of a carbon fiber composite exhaust pipe comprises the steps that an upper die, a lower die and a core die of the exhaust pipe are manufactured, and comprises the steps that a release agent is poured on wiping paper, a die cavity of the upper die, a die cavity of the lower die and the core die are each coated with the release agent twice, and the coating interval is half an hour; Coating a layer of glue on the core mold, and then cutting the aerogel and paving the aerogel on the core mold for a whole circle; Laying four pieces of cut carbon fiber prepregs on the outer side of the aerogel in sequence; The core mold is placed in mold cavities of the upper mold and the lower mold, mold closing and locking are conducted, and then heating curing is conducted; And after cooling and demolding, burrs at corners of the exhaust pipe are removed, high-temperature-resistant paint is sprayed on the surface, and a final product is obtained. The aerogel is compounded on the inner wall of the carbon fiber exhaust pipe, the room-temperature heat conductivity coefficient of the aerogel is only 0.02 K / (m.K), the temperature of high-temperature tail gas can be prevented from being transmitted to the carbon fiber exhaust pipe body, the carbon fiber exhaust pipe can be suitable for being used for a long time in the environment of the high-temperature tail gas, and the service life is greatly prolonged.

Description

technical field [0001] The invention relates to an exhaust pipe of carbon fiber composite material, in particular to a manufacturing method of an exhaust pipe of carbon fiber composite material which can be used for a long time under high-temperature exhaust gas. Background technique [0002] Carbon fiber is a special fiber composed of carbon elements. It has the characteristics of high temperature resistance, friction resistance, electrical conductivity, heat conduction and corrosion resistance. It is fibrous and soft, and can be processed into various fabrics. Because its graphite microcrystalline structure is preferentially oriented along the fiber axis, it has a high density along the fiber axis. strength and modulus. Carbon fiber has a low density, so its specific strength and specific modulus are high. The automobile exhaust pipe made of carbon fiber does not need to be pre-processed during production, the process is convenient, crossing is allowed, corrosion resista...

AI Technical Summary

Problems solved by technology

However, automobile exhaust pipes need to work for a long time under high temperature exhaust gas, so that the exhaust pipes are easy to deform. It is this shortcoming that limits the development of carbon fiber exhaust pipes.

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