A method for manufacturing a high-density needle punched rotary body

By employing a two-dimensional fiber cloth and annular fabric tape laying and needle punching method, combined with tension control, the problem of preparing high-density rotary fabrics was solved, achieving high-density and high-efficiency fabric preparation results.

CN119749037BActive Publication Date: 2026-06-02BEIJING COMPOSITE MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING COMPOSITE MATERIALS CO LTD
Filing Date
2024-12-20
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing technologies struggle to effectively produce high-density rotary needle-punched fabrics, particularly due to issues such as fabric expansion after removing the mesh layer and the difficulty in preparing rotary products.

Method used

By designing the laying method of two-dimensional fiber cloth and annular cloth tape, needle punching is performed along the generatrix and circumferential directions of the high-density needle-punched rotating body. Combined with the tight winding and needle punching of the annular cloth tape, a tightly connected unit layer is formed. The tension and the thickness of the unit layer are controlled by auxiliary tooling to improve the load-bearing capacity of the fiber.

Benefits of technology

The efficient preparation of high-density needle-punched rotating bodies was achieved, which improved the controllability and load-bearing capacity of fibers, eliminated the phenomenon of fiber bundle entanglement and slippage, and improved preparation efficiency and density.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to the field of three-dimensional fabric molding technology, and in particular to a method for preparing a high-density needle-punched rotary body. The rotary body is composed of multiple stacked unit layers, wherein each unit layer is composed of two-dimensional fiber cloth, annular fabric tape, and a mesh. The preparation process includes the following steps: setting the thickness of the unit layer, and calculating the number of layers of two-dimensional fiber cloth and annular fabric tape in each unit layer; calculating the surface density of the two-dimensional fiber cloth and the annular fabric tape according to the density of the high-density needle-punched rotary body to be prepared, the areal density of the mesh, and the set unit layer thickness, and weaving the two-dimensional fiber cloth and the annular fabric tape respectively; uniformly laying the two-dimensional fiber cloth along the parent direction on the outer surface of the weaving mold, winding the annular fabric tape along the circumferential direction, laying a layer of mesh on the outer surface of the outermost fabric, and needle-punching the two-dimensional fiber cloth, the annular fabric tape, and the mesh along the fabric thickness direction to obtain a unit layer; repeating this process multiple times until the stacked thickness of the unit layers reaches the required level to obtain a high-density needle-punched rotary body.
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