Vehicle body carbon fiber bonding method

By combining plasma etching activation and gradient cooling drying pretreatment with composite modified epoxy adhesive and step-by-step pressure curing, the problems of impurity influence, adhesive layer thickness control and low automation in carbon fiber bonding of car bodies have been solved, achieving a high-strength, stable and efficient bonding process.

CN121848683APending Publication Date: 2026-04-14CABOTELLI (SUZHOU) NEW MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202610269593.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-06
Publication Date
2026-04-14

AI Technical Summary

Technical Problem

Existing methods for bonding carbon fiber in car bodies are susceptible to the effects of impurities such as oil, dust, and moisture, resulting in insufficient bonding strength. Traditional adhesives struggle to balance strength, curing efficiency, and weather resistance, making it difficult to control the adhesive layer thickness. Furthermore, the low level of automation negatively impacts bonding quality and production efficiency.

Method used

Plasma etching activation and gradient cooling drying pretreatment are employed, along with composite modified epoxy adhesive, high-precision anilox roller coating, and step-by-step pressure and temperature-increasing curing to achieve clean bonding surfaces and uniform adhesive layers. Automated monitoring and trimming ensure bonding quality.

Benefits of technology

It improves the bonding strength and consistency between carbon fiber and metal substrate, reduces human error, meets the needs of large-scale automobile production, and improves production efficiency and bonding quality.

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Abstract

The invention relates to the technical field of automobile body manufacturing, and particularly discloses an automobile body carbon fiber bonding method. Comprising the following four steps: pretreatment of a bonding base material, preparation and coating of an adhesive, precise bonding and pressurized curing, and detection and finishing after bonding. Wherein the mode of combining high-pressure inert gas purging, ultrasonic cleaning, plasma etching activation and gradient cooling drying is adopted in pretreatment, and the wettability of a bonding surface is improved; the adhesive is a composite modified epoxy adhesive and has high strength and weather resistance; a mode of combining precise positioning with step-by-step pressurization and step heating is adopted in fitting and curing, so that the bonding quality is ensured; and accurate identification and finishing of bonding defects are realized through detection and finishing. The device solves the problems of insufficient bonding strength, low glue layer control precision, low automation degree and the like in the prior art, is high in bonding strength, good in stability and high in production efficiency, meets the large-scale production requirements of automobiles, and can be widely applied to bonding of carbon fiber components of automobile bodies.
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