Method for embedding wires and vertical lead-out of continuous fiber reinforced composite materials

By laying an insulating protective layer and insulating material on the composite matrix to form a prefabricated cavity and fill the spacer structure, the stress concentration and leakage problems of the wires introduced into the composite material are solved, the vertical lead-out of the wires is realized, and the production process is simplified.

CN117774401BActive Publication Date: 2026-05-26AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
Filing Date
2023-12-26
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The large overall diameter of multi-strand cables can create stress concentration areas when introduced into the composite material, and may also lead to leakage due to damage to the insulation layer of the conductor and contact with the carbon fiber. Existing technology cannot achieve vertical lead-out of the conductor along the thickness direction of the composite material.

Method used

An insulating protective layer is laid on a composite matrix, and the insulating material and the wire are heated and bonded together to form a prefabricated cavity and fill the spacer structure. The vertical lead-out of the wire is achieved through one-time curing.

Benefits of technology

It reduces the negative impact of wires on the mechanical properties of composite materials, prevents leakage, simplifies production processes, provides interface space, and improves manufacturing efficiency.

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Abstract

This invention provides a method for embedding wires in continuous fiber-reinforced composite materials and vertically leading them out, comprising the following steps: laying a first insulating protective layer on a first composite material matrix; arranging multiple wires at predetermined intervals and in parallel on the first insulating protective layer; laying a second insulating protective layer above the wires; encapsulating to form a composite material preform; laying a second composite material matrix on the second insulating protective layer; forming a prefabricated cavity in the second composite material matrix through layer-by-layer stacking; filling the prefabricated cavity with a placeholder structure; encapsulating to form a complete preform; and curing the complete preform. After curing, the placeholder structure is removed from the second composite material matrix, and the wires can be vertically led out and moved from the prefabricated cavity. This invention can reduce the negative impact of embedded wires on the mechanical properties of composite materials and effectively prevent leakage problems caused by damage to the insulating varnish layer on the wire surface.
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