JP-2026075018-A - Three-dimensional woven fabric, and method for weaving three-dimensional woven fabric.

JP2026075018AJP 2026075018 AJP2026075018 AJP 2026075018AJP-2026075018-A

Abstract

[Challenge] To improve the strength of three-dimensional woven fabrics. [Solution] The three-dimensional woven fabric 10 consists of a tubular portion 11, an annular first flange portion 12 connected to the first axial end of the tubular portion 11, and an annular second flange portion 13 connected to the second axial end of the tubular portion 11. The tubular portion 11, the first flange portion 12, and the second flange portion 13 are woven using weft threads 14 extending around the axis of the tubular portion 11 and warp threads 15 extending in a direction intersecting the weft threads 14. The weft threads 14 are continuous from the first flange portion 12 through the tubular portion 11 to the second flange portion 13. [Selection Diagram] Figure 2

Inventors

武井裕之
佐竹隆一
吉田祐介

Assignees

株式会社豊田自動織機

Dates

Publication Date: 20260507
Application Date: 20241126
Priority Date: 20241021

Claims (7)

It consists of a cylindrical portion, an annular first flange portion connected to the first axial end of the cylindrical portion, and an annular second flange portion connected to the second axial end of the cylindrical portion. The tubular portion, the first flange portion, and the second flange portion are a three-dimensional fabric woven with weft threads extending around the axis of the tubular portion and warp threads extending in a direction intersecting the weft threads, A three-dimensional woven fabric characterized in that the weft thread is continuous from the first flange portion through the tubular portion to the second flange portion.
The three-dimensional woven fabric according to claim 1, characterized in that at least one of the first flange portion and the second flange portion has a multilayer structure in which multiple fiber layers woven by the weft and warp threads overlap in the axial direction of the tubular portion.
It consists of a cylindrical portion, an annular first flange portion connected to the first axial end of the cylindrical portion, and an annular second flange portion connected to the second axial end of the cylindrical portion. The tubular portion, the first flange portion, and the second flange portion are woven using weft threads extending around the axis of the tubular portion and warp threads extending in a direction intersecting the weft threads, in a method for weaving a three-dimensional fabric, A first flange weaving step in which the first flange portion is woven while the weaving process is carried out around the axis of the mandrel using the weft and warp threads in a direction away from the axis of the mandrel, A yarn movement step is performed after the first flange weaving step, in which the warp and weft threads are moved from the outer peripheral end of the first flange toward the mandrel to a position along the mandrel while holding the first flange, A tubular portion weaving process is performed after the yarn movement process, in which the weft yarn is continuous with the first flange portion and the weft yarn and warp yarn are used to weave the tubular portion while the weaving process is carried out around the axis of the mandrel in a direction away from the first flange portion. A method for weaving a three-dimensional fabric, characterized by including, after the tubular portion weaving step, a second flange portion weaving step in which the weft yarn is continuous with the tubular portion and the weft yarn and warp yarn are used to weave the second flange portion around the axis of the mandrel in a direction away from the axis of the mandrel.
The aforementioned yarn transfer process is, A temporary tubular portion weaving process is performed after the first flange portion weaving process, in which a temporary tubular portion different from the tubular portion is woven before it is formed, while the weaving process is carried out from the outer peripheral end of the first flange portion in a direction away from the first flange portion by the weft and warp threads around the axis of the mandrel, while the tubular portion is floating above the mandrel. The weaving method for a three-dimensional fabric according to claim 3, further comprising a shaping step after the weaving step of the temporary tubular portion, in which the temporary tubular portion is shaped into the shape of the first flange portion, while the warp threads and weft threads are moved from the outer peripheral end of the first flange portion toward the mandrel to a position along the mandrel.
The weaving method for a three-dimensional fabric according to claim 4, characterized in that, in the shaping step, the mandrel is moved in the direction in which the temporary cylindrical portion extends from the outer peripheral end of the first flange portion, thereby shaping the temporary cylindrical portion into the shape of the first flange portion.
The weaving method for a three-dimensional fabric according to claim 4 or 5, characterized in that, in the weaving process for the temporary tubular portion, the weaving of the temporary tubular portion is carried out while the weaving process is progressing in a direction approaching the axis of the mandrel, with the temporary tubular portion floating above the mandrel.
It consists of a cylindrical portion, an annular first flange portion connected to the first axial end of the cylindrical portion, and an annular second flange portion connected to the second axial end of the cylindrical portion. The tubular portion, the first flange portion, and the second flange portion are woven using weft threads extending around the axis of the tubular portion and warp threads extending in a direction intersecting the weft threads, in a method for weaving a three-dimensional fabric, A temporary first flange weaving process is performed to weave a temporary first flange portion on the outer circumference of a first tapered mandrel portion formed at one end of the mandrel, the outer diameter of which decreases as it moves from one end to the other. A tubular weaving process for weaving the tubular portion on the outer circumference of a cylindrical mandrel portion connected to the other side of the first tapered mandrel portion, A temporary second flange weaving step is performed to weave a temporary second flange portion on the outer circumference of a second tapered mandrel portion formed at the other end of the mandrel, the outer diameter of which increases from one side to the other; A method for weaving a three-dimensional fabric, characterized by including a shaping step of shaping the temporary first flange portion and the temporary second flange portion to obtain the first flange portion and the second flange portion.

Description

This invention relates to three-dimensional woven fabrics and methods for weaving three-dimensional woven fabrics. For example, as disclosed in Patent Document 1, a three-dimensional woven fabric comprising a tubular portion, a first flange portion, and a second flange portion is known. The first flange portion is annular. The first flange portion is connected to the first axial end of the tubular portion. The second flange portion is annular. The second flange portion is connected to the second axial end of the tubular portion. The tubular portion, the first flange portion, and the second flange portion are woven using weft threads extending around the axis of the tubular portion and warp threads extending in a direction intersecting the weft threads. Furthermore, in this three-dimensional woven fabric with flanges at both ends, the tubular portion of a second three-dimensional woven fabric, which also has a flange on one side, is inserted from the tip side of a first three-dimensional woven fabric, which has a flange on one side. Then, the tubular portion of a third three-dimensional woven fabric is inserted from the tip side of the second three-dimensional woven fabric, and so on, alternatingly inserting and overlapping the tubular portions from their respective tips. At both ends of the stacked tubular portions, the disc-shaped portions of the three-dimensional woven fabrics are overlapped, and in the tubular portions, the tubular portions of the three-dimensional woven fabrics are stacked radially, while in the flange portions, the disc-shaped portions are stacked in the thickness direction, thereby forming a single stacked three-dimensional woven fabric. Furthermore, Patent Document 1 describes a method in which the tubular portion of one three-dimensional fabric is inserted into the tubular portion of another three-dimensional fabric, and then the warp extension portion at the tip of the tubular portion is spread radially and aligned with the disc-shaped portion of the other three-dimensional fabric. Japanese Unexamined Patent Publication No. 4-108138 Figure 1 is a perspective view showing a three-dimensional woven fabric in the first embodiment.Figure 2 is a schematic cross-sectional view of a three-dimensional woven fabric.Figure 3 shows the mandrel viewed from the axial direction.Figure 4 is a cross-sectional view illustrating the weaving method for three-dimensional fabrics.Figure 5 is a cross-sectional view illustrating the weaving method for three-dimensional fabrics.Figure 6 is a cross-sectional view illustrating the weaving method for three-dimensional fabrics.Figure 7 is a cross-sectional view illustrating the weaving method for three-dimensional fabrics.Figure 8 is a cross-sectional view illustrating the weaving method for a three-dimensional fabric in the second embodiment.Figure 9 is a cross-sectional view illustrating the weaving method for three-dimensional fabrics.Figure 10 is a cross-sectional view illustrating the weaving method for a three-dimensional fabric in the third embodiment.Figure 11 is a cross-sectional view illustrating a method for weaving three-dimensional fabrics.Figure 12 is a cross-sectional view illustrating a method for weaving three-dimensional fabrics.Figure 13 is a cross-sectional view illustrating a method for weaving three-dimensional fabrics. [First Embodiment] The first embodiment of the three-dimensional woven fabric will be described below with reference to Figures 1 to 7. <Overview of three-dimensional woven fabrics> As shown in Figure 1, the three-dimensional woven fabric 10 consists of a tubular portion 11, a first flange portion 12, and a second flange portion 13. The tubular portion 11 is cylindrical. The outer diameter of the tubular portion 11 is constant from the first end to the second end in the axial direction. The inner diameter of the tubular portion 11 is also constant from the first end to the second end in the axial direction. The first flange portion 12 is annular. The first flange portion 12 is connected to the first end of the tubular portion 11 in the axial direction. The second flange portion 13 is annular. The second flange portion 13 is connected to the second end of the tubular portion 11 in the axial direction. The tubular portion 11, the first flange portion 12, and the second flange portion 13 are woven using weft threads 14 and warp threads 15. The tubular portion 11 is woven by multiple warp threads 15, which are arranged circumferentially around the tubular portion 11 and extend axially around the tubular portion 11, intertwining with weft threads 14 that extend spirally around the axis L1 of the tubular portion 11. The first flange portion 12 is woven by multiple warp threads 15, which extend radially from the first axial end of the tubular portion 11, intertwining with weft threads 14 that extend spirally around the axis L1 of the tubular portion 11. The second flange portion 13 is woven by multiple warp threads 15, which ext