Weaving process in three-dimensional conic-casing loom and its product

A fabric and tapered technology, applied in the weaving method of three-dimensional tapered shell fabrics and its products, can solve the problems of long production cycle, high weaving cost, and poor bulkiness of three-dimensional fabrics, and achieve high quality and high damage tolerance , overall good effect

Inactive Publication Date: 2007-03-21
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weaving cost of this three-dimensional weaving method is high, the production cycle is long, and the efficiency is low; the three-dimensional fabric weaves has poor bulkiness, and the fiber uniformity of the composite material parts made by it is poor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Weaving process in three-dimensional conic-casing loom and its product
  • Weaving process in three-dimensional conic-casing loom and its product
  • Weaving process in three-dimensional conic-casing loom and its product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A linear frusto-conical shell fabric was woven (see Figure 5).

[0030] The diameter of the large end of the linear frustum-conical shell fabric is designed to be 360 ​​mm, the length of the generatrix is ​​450 mm, the warp yarn density is 500 yarns / 10cm, and the weft yarn density is 300 yarns / cm. According to the size requirements and density requirements of the large end of the shell fabric, the required number of warp yarns is 5652. According to the length of the busbar of the shell, 5652 warp yarns with a length of 900mm are intercepted, and one end of the 5652 yarns is evenly hung on the On the winding shaft 4 (referring to shown in Fig. 2), the other end of these yarns is passed through the reed 12 among Fig. 2 and the heddle 7 respectively to be connected with the warp shaft 8 below the loom 10 again.

[0031] Start the loom 10, the heald frame 7 moves up and down, and the warp yarn 2 forms an upper and lower layer thereupon, forming a passage for introducing the...

Embodiment 2

[0035] Weave the curved frusto-conical shell fabric (see Figure 3).

[0036] The weaving process of the curved frustoconical shell fabric is basically the same as the weaving process of the linear frustoconical shell fabric described in Example 1. The difference is that the number of warp yarns cut each time in weaving the same fabric is no longer a constant, but changes in order to obtain the required curve shape. In this embodiment, at the initial stage of weaving, each warp-cutting operation cuts off 4 warp yarns on both sides of the fabric; after the fabric length reaches 3 cm, each warp-cutting operation cuts off 6 warp yarns on both sides of the fabric; After the length reaches 5cm, each warp-cutting operation cuts off 9 warp yarns on both sides of the fabric, and so on until the overall profiling weaving of the fabric is completed.

Embodiment 3

[0038] A cylindrical shell fabric is woven (see Figure 6).

[0039] The weaving method of the cylindrical shell fabric is also basically the same as the weaving method described in Example 1, but it is simpler: the weaving process does not need yarn cutting operation from beginning to end. Strictly speaking, the cylindrical shell fabric is a special case of the three-dimensional tapered shell fabric of the present invention (taper = 0).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The present invention is weaving process of three-dimensional conic-casing fabric and its product. The weaving process includes the following steps: 1. pre-setting warp yarns based on the fabric structure and in tubular fabric weaving process; 2. introducing weft yarns in planar helical wefting method and interweaving with preset warp yarns; 3. setting warp cutting points on two sides based on the planar shape of the fabric and performing copying warp cutting operation; and 4. repeating the steps 2 and 3 until finishing the weaving of the three-dimensional conic-casing fabric. The present invention has short weaving period, low cost, simple operation, high efficiency, high adaptability and other features, and the fabric has high integrality, high damage tolerance, high impact resistance and other advantages.

Description

technical field [0001] The present invention relates to a three-dimensional fabric technology, in particular to a weaving method and its products which are especially suitable for a three-dimensional tapered shell fabric as a prefabricated part of a composite material product. The main international patent classification number is proposed to be Int. (2006.01). Background technique [0002] The three-dimensional fabric has a unique structure (see Figure 1), and the composite parts reinforced with it have comprehensive properties such as high damage tolerance, impact resistance, ablation resistance, delamination resistance and fatigue resistance. Three-dimensional conical shell fabrics belong to special-shaped fabrics in three-dimensional fabrics. It has the characteristics of special shape, high performance requirements, and good integrity requirements, and is widely used in the aerospace field. At present, the weaving method of the three-dimensional tapered shell fabric i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D03D3/00D03D13/00
Inventor 杨彩云李嘉禄
Owner TIANJIN POLYTECHNIC UNIV
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