CN111058142A - Three-dimensional sandwich structure fabric and weaving method thereof - Google Patents
Three-dimensional sandwich structure fabric and weaving method thereof Download PDFInfo
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- CN111058142A CN111058142A CN201911116266.1A CN201911116266A CN111058142A CN 111058142 A CN111058142 A CN 111058142A CN 201911116266 A CN201911116266 A CN 201911116266A CN 111058142 A CN111058142 A CN 111058142A
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
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Abstract
The invention discloses a three-dimensional sandwich structure fabric and a weaving method thereof, wherein the three-dimensional sandwich structure fabric comprises an upper plate layer formed by interweaving at least one layer of upper warp and weft, a lower plate layer formed by interweaving at least one layer of lower warp and weft, and a core layer formed by interweaving at least one layer of middle warp and weft; the upper and lower face plate layers and the core layer are connected in a layered structure and are integrally and continuously woven and formed. The three-dimensional sandwich structure fabric has the advantages of various weave structures, large fabric size control range, various section shapes, strong designability, suitability for continuous weaving and the like, and the material compositely reinforced by the fabric has the characteristics of high specific strength, high specific rigidity, good structural stability, fatigue resistance, vibration resistance, sound and heat insulation and the like, and can be widely applied to the fields of aviation, aerospace, ships, automobiles, buildings and the like.
Description
Technical Field
The invention relates to the technical field of three-dimensional fabric weaving, in particular to a three-dimensional sandwich structure fabric and a weaving method thereof.
Background
The sandwich structure is a composite structure formed by combining more than three layers of materials or structures, and is a structural form developed for meeting the requirements of light weight and high strength by a two-layer thin and high-strength panel structure and a thick and light core layer sandwiched between the two layers. The purpose of the core layer is to maintain a distance between the two face sheets that increases the moment of inertia and bending stiffness of the sandwich face sheet cross-section. Because the specific gravity of the core layer is small, the sandwich structure made of the core layer can greatly reduce the self weight of the structure under the same bearing capacity. The sandwich structure has the advantages of high specific strength, high specific rigidity, good structural stability, high bearing capacity, fatigue resistance, vibration resistance, sound insulation, heat insulation and the like, and can be used in the fields of aviation, aerospace, automobiles, buildings and the like.
At present, much work is done on sandwich structure composite materials abroad, while the research on the composite materials in this aspect is little at home and still in the starting stage, most of the research works are carried out on the composite materials with the sandwich structure, and when the composite materials with the sandwich structure formed by connecting the composite materials in an adhesion mode are stressed, a panel and a core layer are easy to separate and damage, so that the impact resistance of the composite materials is influenced. In addition, the traditional shuttle loom mode is adopted to weave the honeycomb three-dimensional fabric in China, the mode has high requirements on warp drafting, the design and weaving requirements on the joint part of two layers are high during forming, the forming difficulty is high, the fabric has a single structure and a single section shape, and the continuous forming of various fabrics with different section shapes cannot be realized.
Chinese patent CN 106676763A introduces an integrally-sewed honeycomb-shaped three-dimensional fabric and a preparation method thereof, the method introduces the concept of 'placing a mold-integrally-sewed molding', the mold is placed in the middle of the layered fabric, the position is fixed by a clamp, and then the fabric is integrally sewed by using sewing equipment, the process is complex, the operation difficulty is high, the layers are connected by a sewing line, the connection strength is weak, and the use of the fabric as a reinforced structural material is influenced.
Chinese patent CN 101476193a introduces a multilayer honeycomb three-dimensional fabric structure and an integral weaving method, wherein each honeycomb side edge in the inclined warp direction of the fabric is a single-layer structure, two edges parallel to the warp direction of the fabric are two adjacent overlapped single layers, and the two overlapped single layers are bound by a double flat binding tissue, and the multilayer honeycomb three-dimensional fabric structure has the defects of single connection mode, single structure, few fabric layers, certain limitation on thickness, no high-strength panel layer and is not beneficial to being used as a reinforced structure material.
Chinese patent CN 107541834A introduces a three-dimensional honeycomb fabric with a topological structure and a weaving method thereof, the fabric is composed of more than two layers of honeycomb holes which are vertically and uniformly arranged, wherein the lower straight edge of the honeycomb hole on the upper layer is connected with the upper straight edge of the honeycomb hole on the lower layer by warps, the fabric has a single structure and a single section shape, and the forming mode has high requirements on warp feeding of each layer of warps by controlling the tension of the warps, has high difficulty in forming and cannot realize continuous weaving.
Chinese patent CN 101058914a introduces a structure construction and weaving method of honeycomb three-dimensional integral hollow woven fabric, each side of the fabric structure is composed of an intersecting three-dimensional woven structure, the fabric structure is formed by binding a hexagon and a trapezoid up and down to form a pair of honeycomb structures, the fabric has a single cross-sectional shape, a small number of fabric layers and certain limitation on thickness, and the weaving of thick fabrics with various cross-sectional shapes cannot be realized.
Disclosure of Invention
The invention provides a three-dimensional sandwich structure fabric and a weaving method thereof, aiming at solving the problems that the existing honeycomb fabric woven by adopting methods of integral sewing, integral weaving or weaving with a shuttle loom and the like has complex preparation process, poor fabric strength, single fabric section shape, few fabric layers, incapability of integral continuous weaving, no high-strength panel layer and the like.
The first technical scheme adopted by the invention is as follows: the laminated paper comprises an upper surface plate layer formed by interweaving at least one layer of upper layer warp yarns and weft yarns, a lower surface plate layer formed by interweaving at least one layer of lower layer warp yarns and weft yarns, and a core layer formed by interweaving at least one layer of middle layer warp yarns and weft yarns; the upper and lower face plate layers and the core layer are connected in a layered connection structure, and the whole body is continuously woven and formed.
The second technical scheme adopted by the invention is an improvement on the first technical scheme, and the second technical scheme adopted by the invention is as follows: the cross-sectional shape of the core layer may be triangular, rectangular, trapezoidal, quadrilateral or hexagonal.
The third technical scheme adopted by the invention is an improvement on the first technical scheme, and the third technical scheme adopted by the invention is as follows: the layer connection structure comprises shallow cross-bending connection, shallow cross-direct connection, deep cross-bending connection, deep cross-direct connection, twill or satin.
The fourth technical solution adopted by the present invention is an improvement of the first, second, or third technical solution, and the fourth technical solution adopted by the present invention is: the weft yarns of the upper and lower surface plate layers are interwoven with the warp yarns of the core layer as well as the warp yarns of the upper and lower surface plate layers.
The fifth technical scheme adopted by the invention is an improvement on the fourth technical scheme, and the fifth technical scheme adopted by the invention is as follows: the upper and lower face sheet layer wefts of at least one layer are interwoven with the core layer warps of at least one layer.
The sixth technical solution adopted by the present invention is an improvement of the first, second, or third technical solution, and the sixth technical solution adopted by the present invention is: one high-performance fiber can be used for weaving, and a plurality of high-performance fibers can be mixed for weaving.
The seventh technical scheme adopted by the invention is as follows: the weaving method of the three-dimensional sandwich structure fabric comprises the steps of weaving an upper surface plate layer, a lower surface plate layer and a core layer independently, interweaving the upper surface plate layer and the core layer, and interweaving the lower surface plate layer and the core layer.
The eighth technical scheme adopted by the invention is as follows: the weaving method of the three-dimensional sandwich structure fabric comprises the steps of weaving an upper surface plate layer, a lower surface plate layer and a core layer independently, interweaving the upper surface plate layer and the lower surface plate layer with the core layer simultaneously, and interweaving all sides of the core layer.
The ninth technical solution adopted by the present invention is an improvement of the seventh or eighth technical solution, and the ninth technical solution adopted by the present invention is:
the weaving method of the three-dimensional sandwich structure fabric specifically comprises the following steps of sequentially connecting:
(1) arranging the warp yarn layers of the upper and lower surface plate layers and the core layer according to the thickness requirement of the fabric to form X layers and Y rows of warp yarns;
(2) passing each warp yarn of each layer through a warp yarn tension control device to control the tension of the warp yarns;
(3) respectively threading the warp yarns into corresponding heddles and reed teeth according to the arrangement of the warp yarn layer number;
(4) adjusting the tension of the warp yarns one by one to keep the warp yarns uniform and consistent;
(5) according to the requirements of the weave structure of the fabric, the heald lifting device starts to circularly move from bottom to top or from top to bottom to drive the corresponding warp yarns to circularly move from bottom to top or from top to bottom, and an equal-height opening is formed in each movement;
(6) after an opening is formed each time, a weft yarn is introduced by a weft insertion device, after the weft insertion is finished, a beating-up device horizontally moves towards a fabric fell, and the weft yarn is beaten into the fell to finish beating-up;
(7) and after beating-up is finished, pulling the fabric to a forming direction for a certain distance according to the weft density requirement of the fabric, and after pulling is finished, carrying out next motion cycle until the weaving of the whole fabric is finished.
The tenth technical solution adopted by the present invention is an improvement of the ninth technical solution, and the tenth technical solution adopted by the present invention is: the warp yarns of each layer in each row in each reed dent are arranged in the order from high to low, and the relative positions of the warp yarns are kept unchanged in the weaving process.
The invention has the beneficial effects that: the invention can realize the molding of different structures of a multilayer fabric, and the thickness requirement and the section shape requirement of the fabric are met through the arrangement of the number of warp yarn layers of the fabric; in the weaving process, warp yarns and weft yarns are in different interweaving modes through the movement of the warp yarns, so that various different fabric weave structures such as shallow cross-bending connection, shallow cross-direct connection, deep cross-bending connection, deep cross-direct connection, twill, satin and the like are formed; the upper plate layer, the lower plate layer and the middle core layer are connected in a layered connection structure and integrally and continuously woven and formed, so that the interlayer connection strength is greatly increased, and the mechanical property of the material is improved; in the weaving process, the arrangement of the warp yarn layer number is carried out according to the size requirements of different cross-sectional shapes, clear openings are formed through the movement of warp yarns, so that weft insertion weaving is facilitated, the size range of the fabric is large, the weaving process is convenient to operate, and the three-dimensional sandwich structure fabric with various cross-sectional shapes can be woven.
The three-dimensional sandwich structure fabric has the advantages of various weave structures, large fabric size control range, various section shapes, strong designability, suitability for continuous weaving and the like, and the material compositely reinforced by the fabric has the characteristics of high specific strength, high specific rigidity, good structural stability, high bearing capacity, fatigue resistance, vibration resistance, sound insulation, heat insulation and the like, and can be widely applied to the fields of aviation, spaceflight, ships, automobiles, buildings and the like.
Drawings
FIG. 1(a) is a schematic structural view of a triangular cross-section three-dimensional sandwich structured fabric of the present invention; FIG. 1(b) is a schematic structural view of a rectangular cross-section three-dimensional sandwich structured fabric of the present invention; FIG. 1(c) is a schematic structural view of a three-dimensional sandwich structured fabric of trapezoidal cross section according to the present invention; fig. 1(d) is a schematic structural view of a three-dimensional sandwich structured fabric of hexagonal cross-section according to the present invention.
Fig. 2 is a schematic structural view of a three-dimensional sandwich structured fabric according to a first embodiment of the present invention.
FIG. 3(a) is a schematic representation of the law of motion of the warp yarns woven individually in the upper cover layer; FIG. 3(b) is a schematic diagram showing the motion of warp yarns woven separately in the core layer; FIG. 3(c) is a schematic representation of the law of motion of the warp yarns woven separately in the lower ply.
FIG. 4(a) is a schematic representation of the motion of the warp yarns interlacing the upper ply with the core; FIG. 4(b) is a schematic representation of the law of motion of the warp yarns woven separately in the lower ply.
FIG. 5(a) is a schematic representation of the law of motion of the warp yarns woven individually in the upper cover layer; FIG. 5(b) is a schematic view showing the motion of the warp yarns interwoven with the lower sheet layer and the core layer.
Fig. 6 is a schematic structural view of a three-dimensional sandwich structured fabric according to a second embodiment of the present invention.
FIG. 7(a) is a schematic representation of the motion of warp yarns woven solely from the top panel; FIG. 7(b) is a schematic representation of the motion of warp yarns woven solely in the core layer; FIG. 7(c) is a schematic representation of the law of motion of the warp yarns woven separately in the lower cover layer.
FIG. 8(a) is a schematic representation of the motion of the warp yarns interwoven with the upper plies of the core; FIG. 8(b) is a schematic diagram showing the motion of the interwoven warp yarns on each side of the core layer; FIG. 8(c) is a schematic representation of the motion of the warp yarns interlacing the lower ply of the lower ply with the lower ply of the core.
FIG. 9(a) is a schematic representation of the law of motion of the warp yarns woven individually in the upper cover layer; FIG. 9(b) is a schematic diagram showing the motion of the warp yarns interwoven with the upper layers of the core layer; FIG. 9(c) is a schematic diagram showing the motion of the interwoven warp yarns on the lower layer of the core layer; FIG. 9(d) is a schematic representation of the law of motion of the warp yarns woven separately in the lower cover layer.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
Example 1
Referring to fig. 2, embodiment 1 provides a three-dimensional sandwich structure fabric with a trapezoidal cross section, including an upper plate layer formed by three layers of upper warp yarns and weft yarns interwoven, a lower plate layer formed by three layers of lower warp yarns and weft yarns interwoven, and a core layer formed by one layer of middle warp yarns and weft yarns interwoven; the upper and lower face plate layers and the core layer are connected in a layered structure and are integrally and continuously woven and formed.
The layer connecting structure can be a shallow cross-bend connection, a shallow cross-straight connection, a deep cross-bend connection, a deep cross-straight connection, a twill or a satin, and is represented by a shallow cross-bend connecting structure in the embodiment.
The three-dimensional sandwich structure fabric can be woven by using one high-performance fiber or by mixing a plurality of high-performance fibers. In this embodiment, 500tex glass fiber of the same fiber material is selected as representative.
The process parameters for the three-dimensional sandwich structured fabric of example 1 are shown in table 1.
TABLE 1 fabrics with trapezoidal Cross-sectional shapes
The weaving method of the three-dimensional sandwich structure fabric of the embodiment comprises the following steps:
1. arranging the upper and lower surface plate layers and the number of warp yarn layers of the core layer according to the cross-sectional shape of the core layer and the thickness of the fabric to form 7 layers and 200 rows of warp yarns;
2. passing each warp yarn of each layer through a warp yarn tension control device to control the tension of the warp yarns;
3. according to the arrangement of the warp yarn layer number, a first warp yarn of each layer of warp yarn penetrates into a first row of harness wires one by one, and then penetrates into the same reed dent; the second warp of each layer of warp penetrates into the second row of heddles one by one, then penetrates into the same reed dent, and the warp of each layer penetrates into the corresponding heddles one by one according to the rule, and then penetrates into the corresponding reed dent;
4. adjusting the tension of the warp yarns one by one to ensure that each warp yarn is in a straightened state and the tension is uniform and consistent;
5. according to the requirements of a set fabric weave structure, the heald lifting device starts to circularly move from bottom to top or from top to bottom to drive corresponding warps to circularly move from bottom to top or from top to bottom, and each movement forms an equal-height opening, and the specific movement steps are as follows in sequence:
5.1, independently weaving the upper plate layer, the lower plate layer and the core layer (shown as 1,2 and 3 in figure 2), wherein the motion law of the warp yarns of each layer is shown as figure 3(a), figure 3(b) and figure 3(c), and when each layer is woven, all the warp yarns on the layer are lifted;
5.2, interweaving the upper plate layer and the core layer (shown as 4 in fig. 2), wherein the movement law of warp yarns of each layer is shown as fig. 4(a) and 4 (b);
5.3, independently weaving the upper plate layer, the lower plate layer and the core layer (shown as 1,2 and 3 in figure 2), wherein the motion law of the warp yarns of each layer is shown as figure 3(a), figure 3(b) and figure 3(c), and when each layer is woven, all the warp yarns on the layer are lifted;
5.4, the following plies are interwoven with the core (as shown at 5 in FIG. 2): the motion law of the warp yarns in each layer is shown in figure 5(a) and figure 5 (b);
6. after an opening is formed each time, a weft yarn is introduced by a weft insertion device, after the weft insertion is finished, a beating-up device horizontally moves towards a fabric fell, and the weft yarn is beaten into the fell to finish beating-up;
7. and after beating-up is finished, the fabric is pulled to the forming direction for a certain distance according to the set density of the fabric, and after the pulling is finished, the next motion cycle is carried out until the weaving of the whole fabric is finished.
According to different requirements of the fabric, the requirement on the thickness of the fabric can be met by increasing or reducing the number of warp yarns of the upper and lower panel layers and the core layer of the fabric, the requirement on the size of each side of the trapezoidal section of the fabric can be met by increasing or reducing the number of unit cycles of weaving of each part and adjusting the weft density, the requirement on the width of the fabric can be met by increasing or reducing the number of rows of warp yarns of the fabric, and the requirement on the weaving length of the fabric can be met by increasing or reducing the total number of weft yarns of the fabric.
Example 2
Referring to fig. 6, embodiment 2 provides a regular hexagonal three-dimensional sandwich fabric, including an upper plate layer formed by three layers of upper warp yarns and weft yarns interwoven, a lower plate layer formed by three layers of lower warp yarns and weft yarns interwoven, and a core layer formed by four layers of middle warp yarns and weft yarns interwoven; the upper and lower face plate layers and the core layer are connected in a layered structure and are integrally and continuously woven and formed.
The layer connecting structure can be a shallow cross-bend connection, a shallow cross-straight connection, a deep cross-bend connection, a deep cross-straight connection, a twill or a satin, and is represented by a shallow cross-bend connecting structure in the embodiment.
The three-dimensional sandwich structure fabric can be woven by using one high-performance fiber or by mixing a plurality of high-performance fibers. In this embodiment, 500tex glass fiber of the same fiber material is selected as representative.
The process parameters for the three-dimensional sandwich structured fabric of example 2 are shown in table 2.
TABLE 2 regular hexagonal Cross-sectional shape Fabric
| Raw material | Glass fiber 500tex |
| Dimension in plane (length x width) (mm)2) | 200×200 |
| Warp specification | 500tex 1 ply |
| Weft specification | 500tex 1 ply |
| Jingmi (root/cm) | 10 |
| Weft density (root/cm) | 4 |
| Number of warp layers (layers) | 10 |
| Number of warp rows (rows) | 200 |
The weaving method of the three-dimensional sandwich structure fabric of the embodiment comprises the following steps:
1. arranging the upper and lower surface plate layers and the number of warp yarn layers of the core layer according to the cross-sectional shape of the core layer and the thickness of the fabric to form 10 layers and 200 rows of warp yarns;
2. passing each warp yarn of each layer through a warp yarn tension control device to control the tension of the warp yarns;
3. according to the arrangement of the warp yarn layer number, a first warp yarn of each layer of warp yarn penetrates into a first row of harness wires one by one, and then penetrates into the same reed dent; the second warp of each layer of warp penetrates into the second row of heddles one by one, then penetrates into the same reed dent, and the warp of each layer penetrates into the corresponding heddles one by one according to the rule, and then penetrates into the corresponding reed dent;
4. adjusting the tension of the warp yarns one by one to ensure that each warp yarn is in a straightened state and the tension is uniform and consistent;
5. according to the requirements of a set fabric weave structure, the heald lifting device starts to circularly move from bottom to top or from top to bottom to drive corresponding warps to circularly move from bottom to top or from top to bottom, and an equal-height opening is formed in each movement; the specific movement steps are as follows in sequence:
5.1, weaving the upper plate layer, the core layer and the lower plate layer independently (as shown in 1,2 and 3 in figure 6), wherein the motion law of warp yarns of each layer is shown in figure 7(a), figure 7(b) and figure 7 (c);
5.2, the upper plate layer is interwoven with the upper layer of the core layer, the sides of the core layer are interwoven, the lower plate layer is interwoven with the lower layer of the core layer (shown as 4 in fig. 6), and the motion law of each layer of warp yarn is shown in fig. 8(a), fig. 8(b) and fig. 8 (c);
5.3, the upper plate layer, the core layer and the lower plate layer are independently woven (as shown in 1,2 and 3 in FIG. 6), and the motion law of warp yarns of each layer is shown in FIG. 7(a), FIG. 7(b) and FIG. 7 (c);
5.4, weaving the upper plate layer independently, weaving the upper layer of the core layer, weaving the lower plate layer independently (as shown in 5 in fig. 6), wherein the motion law of warp yarns of each layer is shown in fig. 9(a), 9(b), 9(c) and 9 (d);
6. after an opening is formed each time, a weft yarn is introduced by a weft insertion device, after the weft insertion is finished, a beating-up device horizontally moves towards a fabric fell, and the weft yarn is beaten into the fell to finish beating-up;
7. and after beating-up is finished, the fabric is pulled to the forming direction for a certain distance according to the set density of the fabric, and after the pulling is finished, the next motion cycle is carried out until the weaving of the whole fabric is finished.
According to different requirements of the fabric, the thickness requirement of the fabric can be met by increasing or reducing the number of warp yarns of the upper and lower panel layers and the core layer of the fabric, the requirement of the size of the regular hexagonal cross section of the fabric can be met by increasing or reducing the number of unit cycles of weaving of each part and adjusting the weft density, the width requirement of the fabric can be met by increasing or reducing the number of rows of warp yarns of the fabric, and the requirement of the weaving length of the fabric can be met by increasing or reducing the total number of weft yarns of the fabric.
It can be seen from the above embodiments that different cross-sectional shapes can be obtained by arranging the number of warp yarn layers according to the specific cross-sectional shape requirement, performing regular movement of warp yarns according to the requirement of the weave structure, and sequentially performing opening weft insertion weaving, such as the three-dimensional sandwich structure fabric with a triangular cross-section shown in fig. 1 (a); a rectangular cross-section three-dimensional sandwich structured fabric as shown in figure 1 (b); a three-dimensional sandwich structure fabric having a trapezoidal cross section as shown in fig. 1(c) and a three-dimensional sandwich structure fabric having a hexagonal cross section as shown in fig. 1 (d). The three-dimensional sandwich structure fabric obtained by the invention has the characteristics of various organizational structures, large fabric size control range, various section shapes, strong designability, continuous weaving, high specific strength, high specific rigidity, good structural stability, high bearing capacity, fatigue resistance, vibration resistance, sound insulation, heat insulation and the like, and can be widely applied to the fields of aviation, aerospace, ships, automobiles, buildings and the like.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A three-dimensional sandwich structure fabric is characterized by comprising an upper plate layer formed by interweaving at least one layer of upper warp and weft, a lower plate layer formed by interweaving at least one layer of lower warp and weft, and a core layer formed by interweaving at least one layer of middle warp and weft; the upper and lower face plate layers and the core layer are connected in a layered connection structure, and the whole body is continuously woven and formed.
2. The three-dimensional sandwich structured fabric according to claim 1, wherein the cross-sectional shape of the core layer may be triangular, rectangular, trapezoidal, quadrilateral or hexagonal.
3. The three-dimensional sandwich structured fabric according to claim 1, wherein the layer structure comprises shallow crossties, deep crossties, twills or satins.
4. The three-dimensional sandwich structure fabric according to any one of claims 1 to 3, wherein the weft yarns of the upper and lower face plate layers are interwoven not only with the warp yarns of the present layer but also with the warp yarns of the core layer.
5. The three-dimensional sandwich structured fabric according to claim 4, wherein the upper and lower panel layer weft yarns of at least one layer are interwoven with the core layer warp yarns of at least one layer.
6. The three-dimensional sandwich structure fabric according to any one of claims 1 to 3, wherein one high-performance fiber or a mixture of high-performance fibers can be used for weaving.
7. The method for weaving a three-dimensional sandwich structure fabric according to any one of claims 1 to 6, comprising the steps of weaving the upper and lower face sheet layers and the core layer separately, interlacing the upper face sheet layer with the core layer, and interlacing the lower face sheet layer with the core layer.
8. The method for weaving a three-dimensional sandwich structure fabric according to any one of claims 1 to 6, comprising the steps of weaving the upper and lower face sheet layers and the core layer separately, simultaneously interlacing the upper and lower face sheet layers with the core layer, and interlacing the edges of the core layer.
9. The weaving method according to claim 7 or 8, characterized in that it comprises in particular the following steps connected in sequence:
(1) arranging the warp yarn layer number of the upper and lower surface plate layers and the core layer according to the cross-sectional shape of the core layer and the thickness requirement of the fabric to form X layers and Y rows of warp yarns;
(2) passing each warp yarn of each layer through a warp yarn tension control device to control the tension of the warp yarns;
(3) respectively threading the warp yarns into corresponding heddles and reed teeth according to the arrangement of the warp yarn layer number;
(4) adjusting the tension of the warp yarns one by one to keep the warp yarns uniform and consistent;
(5) according to the requirements of the weave structure of the fabric, the heald lifting device starts to circularly move from bottom to top or from top to bottom to drive the corresponding warp yarns to circularly move from bottom to top or from top to bottom, and an equal-height opening is formed in each movement;
(6) after an opening is formed each time, a weft yarn is introduced by a weft insertion device, after the weft insertion is finished, a beating-up device horizontally moves towards a fabric fell, and the weft yarn is beaten into the fell to finish beating-up;
(7) and after beating-up is finished, pulling the fabric to a forming direction for a certain distance according to the weft density requirement of the fabric, and after pulling is finished, carrying out next motion cycle until the weaving of the whole fabric is finished.
10. The weaving method according to claim 9, characterized in that the warp yarns of the respective layers of the respective rows in each dent are arranged in order from top to bottom, and their relative positions are maintained during weaving.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112680865A (en) * | 2020-12-11 | 2021-04-20 | 江苏恒力化纤股份有限公司 | Radar made of composite material and preparation method thereof |
| CN112680866A (en) * | 2020-12-11 | 2021-04-20 | 江苏恒力化纤股份有限公司 | Ablation material compounded by fiber cloth and preparation method thereof |
| CN112725985A (en) * | 2020-12-28 | 2021-04-30 | 南京玻璃纤维研究设计院有限公司 | Variable-density three-dimensional fabric and weaving method thereof |
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