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Method for profiling weaving thick top-to-thin wall capping fabric

A technology for capping fabrics and forming methods, which is applied in the directions of fabrics, textiles, textiles and papermaking, can solve the problems of low profiling accuracy of fabric size and uneven density inside and outside the fabric, and achieves high profiling accuracy and uniform fabric density. Effect

Active Publication Date: 2013-04-10
NANJING FIBERGLASS RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the existing integral weaving method is used to weave reinforced fabrics, there are quality defects such as low fabric size profiling accuracy, uneven density inside and outside the fabric, etc., and it is necessary to perform machining after composite molding to ensure the dimensional accuracy of the reinforcement material. Therefore, in the integral weaving method When weaving reinforcement fabrics, according to the geometric shape of the fabric, the profiling weaving method of thick top-to-thin-wall capping fabric can effectively improve the profiling accuracy of the reinforcement fabric and the overall uniformity of the fabric, especially the weaving profiling of net-size fabrics The weaving method is especially important

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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  • Method for profiling weaving thick top-to-thin wall capping fabric
  • Method for profiling weaving thick top-to-thin wall capping fabric
  • Method for profiling weaving thick top-to-thin wall capping fabric

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: develop as Image 6 The glass fiber reinforced fabric with variable thickness on the top is shown, the thickness of the top of the fabric is 50mm, the diameter of the top is 30mm, and the gradual thickness of the top transitions to a cone, the thickness of the cone part is 5mm, and the diameter is 70mm. The technical parameters of the capping fabric are designed as shown in Table 1.

[0028] Table 1 Capping fabric process parameter table

[0029]

[0030] The specific weaving steps of the capping fabric are as follows:

[0031] ⑴Fix the fabric braiding mandrel on the operating platform; select glass fiber with a specification of 480Tex to carry out the square top weaving operation on the top of the mandrel, and interweave 4 pairs of yarns to form a square top. In order to achieve a top thickness of 50mm, the square top laying 4 pairs of yarns are interlaced, the number of warp yarn layers is 30 layers, and the fibers are radially introduced into the h...

Embodiment 2

[0037] Example 2: Development of capped and variable thickness quartz fiber reinforced fabrics, the maximum thickness of the top of the fabric is 40mm (i.e. the thickness of the initial square roof), the capped diameter is 20mm, the transition from capped gradient thickness to cone, the thickness of the cone part is 20mm, the cone angle is 15°. The raw material of the fabric is quartz fiber 190Tex, the warp layer of the square top part is 30 layers, the outer 5 layers of warp yarn are quartz fiber 190Tex×4 ply yarn, the middle 9 layers are quartz fiber 190Tex×3 ply yarn, and the inner 9 layers are Quartz fiber 190Tex × 2 ply yarns; the warp of the cone part is 24 layers; the weft yarns are all quartz fiber 190Tex × 7 ply yarns.

[0038] (1) Fix the fabric braiding mandrel on the operating platform.

[0039] (2) The fabric adopts a 2.5D shallow cross-bending structure.

[0040] (3) Square top knitting operation, criss-crossing 4 pairs of yarns (each pair of warp yarns include...

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 method for profiling weaving a thick top-to-thin wall capping fabric. The method comprises the following steps: 1, the capping fabric is woven from the center of a core model to form, the fabric is woven outside the weaving core model, and two pairs or four pairs of yarns which are crossed with each other are used to weave one or two weaving structures to circularly form a square top; 2, the interlaced yarns which form the square top are taken as warps, and wefts are gradually guided into each layer of yarns layer by layer; the square top is taken as a center, the wefts are woven in an intertwining manner to form a concentric circle, and a round top is formed after a plurality of circular weaving; and 3, after the round top is completely woven, the fabric is woven from a thick top capping fabric to a conical thin-wall fabric, the weaving diameter of the fabric is gradually increased during the conversion process and is increased through adding the weft arrays along the warp direction, and the weft density is kept consistent. By the method, a forming and producing technology of the complicated capping fabric is simplified, the internal fibers of the capping reinforcement fabric are distributed uniformly, a fabric forming effect is enhanced, and the clear dimension profiling weaving is realized.

Description

technical field [0001] The invention relates to a profiling knitting forming method of a thick-top-turned-thin-wall capping fabric. Background technique [0002] Three-dimensional fabric reinforcement is a key component of high-performance composite materials, which plays a role in increasing strength and improving performance in composite materials, and determines the comprehensive performance of composite materials to a large extent. [0003] At present, composite reinforced fabrics with standard capping and rotary bodies (cylindrical, conical, conical, etc.) are mostly manufactured by integral weaving methods. The reinforced fabric manufactured by the integral weaving method has good integrity and uniform fiber distribution, and the composite material made of it has excellent mechanical properties and electrical properties, and has been widely used in the aerospace field. [0004] With the continuous development of science and technology, the profiles of composite materi...

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): D03D25/00D03D13/00
Inventor 朱建勋郭洪伟张立泉朱梦蝶唐亦囡
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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