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Low-cost and high-quality warp-knitted unidirectional fabric and production process thereof

A unidirectional fabric and production process technology, applied in warp knitting, knitting, textiles and papermaking, etc., can solve problems such as instability, uneven cloth surface, and lack of high-quality unidirectional cloth

Active Publication Date: 2017-08-29
CHANGZHOU HONGFA ZONGHENG ADVANCED MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defects and deficiencies of this method are: ① There is a phenomenon of uneven tension in the warp direction yarn of the auxiliary light and thin fabric, and it is difficult to control the tension of the 0-degree glass fiber and the tension consistency of the auxiliary light and thin fabric during the weaving process, so it often causes cloth The surface is uneven, the fabric is not straight, etc., the adjustment is difficult and unstable, and the fabric scrap rate is high; ②Light and light fabrics need to be woven first, and then composite woven with 0-degree glass fiber yarn, which involves two weaving and Loss, high production cost; ③ There are many types of warp-knitted unidirectional fabric widths for electric blades, and light and thin fabrics with fixed widths are used to produce unidirectional fabrics, which waste more light and thin fabrics, and light and thin fabrics with multiple widths are used for production. This has a large backlog of inventory and increases management costs
But there are also defects and deficiencies: ①Because the 90-degree weft yarn uses spun yarns such as 68tex, 100tex, and 136tex, it is easy to break during the production process and the raw material price is high; , it is easy to produce uneven distribution of weft yarns, and the interval is generally 5-10mm wide. The uneven distribution of weft yarns will cause micro-arching phenomenon of 0-degree glass fiber yarns, and uneven fabric surface will occur after too many frequencies
Defects and deficiencies: Since the distance between the weft insertion hooks of the axial warp knitting machine is 12.7mm, and the weft yarn distribution distance of the unidirectional fabric is generally 4mm or 5mm, the weft yarn can only be inserted and cut one by one. Due to the difference in the distance, it will cause The tension of the edge of the machine head and the tail is not the same as that of the fabric, resulting in uneven surface of the edge of the fabric
[0007] In summary, there is a lack of a method that can produce high-quality unidirectional cloth at a lower cost

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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Examples

Experimental program
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Effect test

Embodiment 1

[0027] The production process of the low-cost high-quality warp-knitted unidirectional fabric of the present embodiment adopts a multiaxial warp-knitting machine, comprising the following steps:

[0028] Step 1: Weft laying; laying weft yarns in the weft laying area of ​​the multi-axial warp knitting machine to ensure that the spacing between each weft yarn is the same;

[0029] Step 2: Weft insertion and binding; the laid weft yarn is transported to the knitting head of the multi-axial warp knitting machine by the conveying device, and is bound with the binding yarn after being combined with the 0° warp yarn. Weft and bind.

[0030] In order to complete step 1 well, the adjacent needles on the weft needle block are equally spaced; the three kinds of weft yarn needle blocks are the standard type needle block, the A type needle block and the B type needle block with the same width, and the three types of needle blocks X needles are arranged on each side; X needles with a diame...

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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PUM

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Abstract

The invention discloses a low-cost and high-quality warp-knitted unidirectional fabric and a production process thereof. A multiaxial warp knitting machine is adopted. The production process comprises the following steps that 1, weft yarns are laid, wherein the weft yarns are laid in a weft yarn laying zone of the multiaxial warp knitting machine, and it is ensured that the separation distances of the weft yarns are equal; 2, weft insertion and binding are performed, wherein the laid weft yarns are conveyed to a warp knitting machine head of the multiaxial warp knitting machine, are compounded with 0-degree warp yarns and then are bound by binding yarns, it is limited that one weft yarn is inserted every one rotating circle of the machine head and is bound. By adopting the process, the weft yarns equal in separating distance can be produced, the unidirectional fabric with the independently bound weft yarns has a flat cloth cover and is flat and straight, the weft yarns can be rough yarns of 200 tex and 300 tex, the raw materials are relatively lower in price, and the fabric cost is lower. In addition, fabric width adjustment is more convenient, waste is relatively little, the cost can be also controlled through device change, and the process is smooth and stable in operation.

Description

technical field [0001] The invention relates to a low-cost high-quality warp-knitted unidirectional fabric and a production process thereof. Background technique [0002] With the development of the wind power industry for more than ten years, wind turbine manufacturers and blade manufacturers have put forward higher requirements for glass fiber fabrics for wind power blades, such as: the flatness of the cloth surface, the straightness of the fabric after opening, the fabric in Flow conductivity during resin infusion, especially warp-knitted unidirectional fabrics for wind turbine blade girders. [0003] At present, there are three main production methods for warp-knitted unidirectional fabrics for wind power blades: [0004] Method 1: Use biaxial warp knitting machine or stitch knitting machine to produce, 0 degree glass fiber yarn plus auxiliary light and thin fabric (plain woven or warp knitted fabric with auxiliary weft direction as the main direction, the warp yarn is ...

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): D04B21/14
CPCD04B21/14
Inventor 谈昆伦季小强刘时海陈丽香何梦瑶
Owner CHANGZHOU HONGFA ZONGHENG ADVANCED MATERIAL TECH
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