A self-heating curing process for carbon fiber composite materials

By constructing a globally uniform conductive network and a segmented, precise curing process, the problems of uneven heating and high energy consumption of carbon fiber composite materials have been solved, achieving efficient and low-damage curing of carbon fiber composite materials, which can meet the molding needs of multiple scenarios and structures.

CN122299962APending Publication Date: 2026-06-30ANYANG HAOKE TECH DEV CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANYANG HAOKE TECH DEV CO LTD
Filing Date
2026-05-28
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing carbon fiber composite curing processes suffer from problems such as uneven temperature field distribution, high energy consumption, low molding efficiency, easy damage to carbon fibers, numerous curing defects, and poor process adaptability. In particular, the uniformity of heating is difficult to control in thick cross-sections and complex structural components.

Method used

By constructing a uniform conductive network throughout the entire body, using a low-voltage heating method, and combining it with a segmented and precise curing process, including low-temperature pre-curing, medium-temperature uniform-speed curing, high-temperature post-curing, and gradient cooling, flexible conductive interconnect nodes and temperature sensors are used to achieve closed-loop temperature control, ensuring uniform current distribution throughout the preform and precise control of the resin curing process.

Benefits of technology

It achieves uniform heating across the entire carbon fiber composite material, reduces production energy consumption, improves curing quality and mechanical properties, adapts to the integrated molding of carbon fiber composite components in multiple scenarios and structures, and reduces residual stress and defects.

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Abstract

This invention discloses a self-heating curing process for carbon fiber composite materials, belonging to the field of composite material curing and molding technology. Addressing the problems of uneven temperature field, easy damage to carbon fibers, and high energy consumption in existing processes, this invention includes: plasma-activated carbon fiber fabric followed by layup; during layup, flexible conductive interconnect nodes are embedded along the length, width, and thickness directions inside the preform to construct a three-dimensional uniform conductive network through carbon fiber bundle overlap; resin impregnation is completed using vacuum-assisted resin transfer molding; heating and curing are achieved using a low-voltage DC power supply with the carbon fibers themselves as the internal heat source; and a four-stage stepped curing scheme is adopted, combining a closed-loop temperature control system: low-temperature pre-curing and bubble removal—medium-temperature uniform curing—high-temperature post-curing and stress relief—gradient cooling and demolding. The components of this invention exhibit a temperature difference ≤ ±1.5℃, a degree of curing ≥ 98.8%, and energy consumption reduced by more than 70%, making it suitable for different carbon fiber and resin systems, as well as large-size and irregularly shaped components.
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