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An expansion method and fabric technology, applied in braids, fabrics, textiles, etc., can solve the problems of unable to achieve cross-sectional size expansion, unable to achieve cross-sectional size expansion, unable to achieve 2.5-dimensional structure expansion, etc., to achieve good top fiber continuity, Easy-to-control uniformity, high damage-tolerance effects
Active Publication Date: 2013-04-03
NANJING FIBERGLASS RES & DESIGN INST CO LTD
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Problems solved by technology
The integral molding method of 2.5D structure can meet the integrated molding requirements of complex profiles, but the traditional capping and weaving method is only suitable for molding with relatively standard top shapes, such as round, conical, square, etc.
[0004] The Chinese patent "Preform Preparation Method with Expandable Cross-sectional Size" (201110341184.4) introduces the use of a three-dimensional multi-directional structure to achieve the expansion of the cross-sectional size, but cannot achieve the expansion of the cross-sectional size of the 2.5-dimensional structure
The Chinese patent "Capping Three-dimensional Fabric and Its Weaving Method" (200610013430.2) introduces the capping and forming method of three-dimensional capping fabric, but the method introduced in this patent cannot realize the expansion of the cross-sectional size, nor can it realize the multi-directional expansion of the cross-sectional size
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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Embodiment 1
[0022] Example 1: Combining figure 1 The instructions are as follows: set the warp layers of the fabric to 8 layers, and insert the wefts in a clockwise direction column by column.
[0023] figure 1 It is a fabric with a spherical top and three corners. The three corners are regarded as the top of a triangle. The large corner at the top is designated as large corner 1, and the large corner at the bottom is designated as large corner 2. The specific process implementation steps are as follows:
[0024] 1. The fabric adopts 2.5D shallow cross-bending structure.
[0025] 2. During the weaving process, the mandrel is used as the inner core for weaving.
[0026] 3. According to the characteristics of the top, determine the shape of the top as a triangle.
[0027] 4. Adopt the existing roofing technology to complete the roof weaving on the top of the center.
[0028] 5. Finish the roof weaving on the top of the center (such as figure 1 After middle 1), expand the center top wit...
Embodiment 2
[0042] Example 2: Combining image 3 The instructions are as follows: Set the number of warp layers of the fabric to 6 layers:
[0043] 1. The fabric adopts 2.5D shallow cross-bending structure.
[0044] 2. During the weaving process, the mandrel is used as the inner core for weaving.
[0045] 3. According to the characteristics of the top, determine the shape of the top as a pentagon.
[0046] 4. Use the existing roofing technology to complete the roofing weaving of the central square top (5 in Figure 4).
[0047] 5. After finishing the roof knitting of the center square top, complete the roof knitting of the triangular area with the existing weft insertion technology (6 in Figure 4).
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 invention relates to a 2.5-dimension (2.5D) multidirectional extensible weaving method, which is characterized in that (1) a fabric adopts a 2.5D structure; (2) weaving of the fabric adopts core die simulation weaving; (3) top pavement weaving on the top of the center is finished by the conventional yarn paving and weft lining technology; and (4) after the top pavement weaving on the top of the center is finished, expansion is executed by selecting an expansion shape consistent with the top shape of the fabric according to the top shape. The 2.5D multidirectional extensible weaving method has the advantages that (1) bidirectional or multidirectional expansion of the top of the fabric can be realized, and overall forming of the fabric with a relatively complicated top shape is facilitated; (2) the fibers on the top are high in continuity; and (3) the uniformity during fabric forming is easy to control. The fabric woven by the weaving method has comprehensive performances such as high strength, high modulus, high damage tolerance, impact resistance, layering resistance and fatigue resistance; and the method can be widely applied to weaving fabrics which have sealed tops and are in various shapes in the field of stereo fabrics.
Description
technical field [0001] The invention relates to a 2.5D multidirectional expandable weaving method, which belongs to the field of three-dimensional fabric manufacturing. Background technique [0002] The 2.5D fabric in the three-dimensional fabric has a special structure, and the composite material reinforced with it has comprehensive properties such as high strength, high modulus, high damage tolerance, impact resistance, anti-delamination and anti-fatigue, which can significantly improve the performance of weapons. [0003] Among the three-dimensional fabrics, the capping fabric has a wide range of applications, such as structural supports, radome, etc., all have tops of different thicknesses. With the improvement of the performance of the new generation of strategic and tactical missiles, the shapes of structural supports and radomes are becoming more and more complex, and the requirements for fabric performance are also increasing. The integral molding method of 2.5D str...
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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