CN110258003B - Top-sealing weaving method of rotary shell fabric and weaving method of rotary shell fabric - Google Patents
Top-sealing weaving method of rotary shell fabric and weaving method of rotary shell fabric Download PDFInfo
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- CN110258003B CN110258003B CN201910586757.6A CN201910586757A CN110258003B CN 110258003 B CN110258003 B CN 110258003B CN 201910586757 A CN201910586757 A CN 201910586757A CN 110258003 B CN110258003 B CN 110258003B
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Abstract
The invention provides a top-sealing weaving method of a rotary shell fabric and a weaving method of the rotary shell fabric, wherein the top-sealing weaving method of the rotary shell fabric comprises the following steps: s1, arranging a positioning device at the top of a core mold; s2, weaving a cylindrical structure by taking the positioning device as a center; and S3, continuously weaving a transition region around the cylindrical structure, enabling the diameter of the transition region to be the diameter required by the capping structure, and gradually reducing the thickness of the transition region to the thickness of the thin wall of the rotary shell to finish the capping region weaving of the rotary shell fabric. The method for weaving the rotary shell fabric by means of the top sealing comprises the steps that a positioning device is used as an auxiliary die, a cylindrical structure is woven in a fabric top sealing area, the diameter of the cylindrical structure is enlarged, the thickness of the top sealing area is gradually reduced until the thickness of the top sealing area is consistent with that of a thin-wall area, the top sealing weaving of the fabric is completed, the difficulty of the top sealing weaving process of the rotary shell fabric is greatly reduced, and the continuity of a fiber structure of the whole fabric and the uniformity of warp and weft sealing are guaranteed.
Description
Technical Field
The invention belongs to the technical field of three-dimensional fabric forming, and particularly relates to a top-sealing weaving method of a rotary shell fabric and a weaving method of the rotary shell fabric.
Background
Short fibers, continuous fibers, two-dimensional fabrics and three-dimensional fabrics made of the high-performance fibers can be used as a reinforcement in composite materials to reinforce various materials and are used for preparing advanced composite materials. The advanced composite material reinforced by the three-dimensional fabric as the reinforcement has excellent mechanical properties such as light weight, high strength, high modulus, impact resistance and fatigue resistance, and also has excellent functional characteristics such as wave transmission, wave absorption and high temperature resistance, and is widely used in the fields of aerospace and the like, and the continuity, distribution uniformity and consistency of the fibers in all directions of the three-dimensional fabric directly influence the comprehensive performance of the composite material.
The three-dimensional weaving technology is a technology for orderly interweaving continuous fiber bundles in space to form an integral three-dimensional fabric, one-time weaving and forming of parts with complex profiles can be realized through process design, fibers are uniformly distributed and can be directly compounded to obtain a target product, and processing difficulty and defects caused by complex profiles are avoided. In the fields of aerospace and the like, a three-dimensional fabric of a rotary shell capping structure is usually required to be used as a reinforcement in a composite material, but the rotary shell capping three-dimensional fabric belongs to a special-shaped fabric, has a special shape and is not easy to weave and form at one time. And the adoption of the integral weaving method has the disadvantages that the weaving process difficulty of the capping area of the rotary shell is high, and the quality defects of uneven warp and weft density of the reinforcement body, deviation of the external surface size, inconsistent density and the like are easy to occur.
Disclosure of Invention
The invention solves the technical problem of providing a method for weaving the top sealing of the rotary shell fabric and a method for weaving the rotary shell fabric, which simplify the weaving of the top sealing area of the rotary shell fabric by means of a positioning device, and the woven top sealing area has high structural continuity, good consistency, strong uniformity of warp and weft density and low processing difficulty.
In order to solve the above problems, the present invention provides a capping weaving method of a revolving shell fabric, comprising the following steps:
s1, arranging a positioning device at the top of a core mold;
s2, weaving a cylindrical structure by taking the positioning device as a center;
s3, continuously weaving a transition region around the cylindrical structure, enabling the diameter of the transition region to be the diameter required by the capping structure, and gradually reducing the thickness of the transition region to the thickness of the thin wall of the rotary shell to complete the capping region weaving of the rotary shell fabric;
the specific weaving method for weaving the cylindrical structure can use any conventional method disclosed in the prior art, and the cylindrical structure can be woven around the surface of the positioning device by taking the positioning device as a small core die, the specific weaving structure can be a 2.5D woven structure, and the interweaving structure of warp yarns and weft yarns can adopt shallow cross-bending connection, shallow cross-direct connection or deep cross-linking connection and the like. The specific dimensions of the woven cylindrical structure can be adjusted according to the size of the capping area of the target product. The weaving of the transition zone may also be carried out by any conventional method disclosed in the prior art, preferably with a weave structure corresponding to that of the cylindrical structure, with a 2.5D weave structure being chosen to ensure continuity, uniformity and integrity of the fibers in the capping zone. In the weaving process of the rotary shell fabric, high-performance fibers such as glass fibers, high-density polyethylene fibers, basalt fibers, quartz fibers, carbon fibers and the like can be used as materials of warp yarns and weft yarns.
The method for weaving the closed top of the rotary shell fabric comprises the steps of installing a positioning device on a core mould, using the positioning device as a small core mould support to weave a cylindrical structure with the thickness of the closed top, gradually reducing the thickness of the cylindrical structure while enlarging the diameter of the cylindrical structure, and transiting the thick top of a closed top area to be consistent with the thickness of a thin-wall area to form a transition area so as to complete the weaving of the whole closed top area.
In the technical solution, preferably, step S2 specifically includes the following steps:
s2a, arranging a plurality of warp layers around the positioning device, wherein each warp layer is provided with a plurality of rows of warps, and the warps are arranged in the circumferential direction of the positioning device by taking the positioning device as the center and extend outwards;
s2b, introducing a first row of circular weft yarns at the periphery of the positioning device to fix the warp yarns by the first row of weft yarns;
s2c, introducing a second row of circular weft yarns between warp yarn layers, winding the warp yarns and the second row of weft yarns to form an interwoven structure, wherein the second row of weft yarns and the first row of weft yarns are concentric circles, adding a new warp yarn row in each warp yarn layer, and fixing the new warp yarn row through the second row of weft yarns;
s2d, repeating the step S2c, and weaving to form a cylindrical structure.
The interweaving structure of the warp yarns and the weft winding amount (namely the number of the weft yarns introduced into each warp yarn layer) can be selected according to the mechanical property requirement of the fabric as a reinforcing material. The method can quickly fix the warp yarns with the weft yarns in the circumferential direction of the positioning device through the support of the positioning device to form a stable interweaving structure, so that the weaving process of the top sealing area of the rotary shell is simpler and is easy to operate; and with the positioning device as the center, uniformly distributing warp yarns and weft yarns on the circumference of the positioning device to form a cylinder, and adding new warp yarns among warp yarn rows when the diameter of the cylinder is continuously enlarged by adding the weft yarns to ensure the uniformity of fibers in the fabric and the uniformity of warp density and weft density.
It is further preferred that the adding of the new warp yarn columns in step S2c is implemented by adding the same number of new warp yarn columns between every two adjacent warp yarn columns. Thereby better guaranteeing the warp density uniformity of the fabric capping area.
It is further preferred that the number of new warp columns added between adjacent warp columns is 1-2 columns.
In the technical solution, preferably, when the transition region is woven in step S3, the thickness of the transition region is gradually reduced by one or a combination of several methods of changing the interweaving structure of the warp yarns and the weft yarns, changing the weft winding amount of the warp yarns, and reducing the number of layers of the warp yarns. Specifically, the change of the interweaving structure of the warp yarns and the weft yarns can be realized by changing the stacking mode of the weft yarns when the warp yarns and the weft yarns are interwoven and reducing the stacking thickness of the weft yarns; the weft winding amount of the weft yarns can be changed by reducing the weft winding amount of the warp yarns during the interweaving of the warp yarns and the weft yarns; the number of warp layers can be reduced by cutting off the warp layer by layer. The above methods may be combined two by two, or three by three to achieve a gradual reduction in the thickness of the capping region transition region.
It is further preferable that the thickness of the transition region is gradually reduced by alternately changing the interweaving structure of the warp yarns and the weft yarns and changing the winding amount of the warp yarns when the transition region is woven in step S3.
In the technical scheme, preferably, in order to ensure the structural stability and the uniformity of the weaving process of the cylindrical structure in the capping area, the positioning device preferably selects the cylindrical structure, and the diameter of the positioning device is 0.5-1.5 mm. The material of the positioning device can be selected from the same material as the core mould, or other materials which can form a fixed shape can be used for manufacturing the positioning device.
The thickness of the cylindrical structure can be adjusted according to the thickness requirement of the capping area, and preferably, the thickness of the cylindrical structure is 1-100 mm.
The textile structure of the cylindrical structure, the transition area and the thin-wall area of the rotary shell fabric can be 3D or 2.5D, and preferably, the cylindrical structure, the transition area and the thin-wall area of the rotary shell fabric are all 2.5D textile structures. The 2.5D structure has better integrity, and can avoid the defect of complex process of three-dimensional weaving materials.
The invention also aims to provide a weaving method of the rotary shell fabric, which is characterized in that the weaving of the top sealing area of the rotary shell fabric is finished according to the top sealing weaving method of the rotary shell fabric, and then the thin-wall area of the rotary shell fabric is woven below the top sealing area of the rotary shell fabric by taking a core die as a die, so that the rotary shell fabric is obtained.
The weaving method of the thin-wall area can use any conventional method disclosed in the prior art, and the weaving structure is preferably consistent with the transition area, so that the continuity and uniformity of the fibers of the integral structure of the fabric are ensured. The top-sealing weaving method of the rotary shell fabric continuously weaves the top-sealing area and the lower thin-wall area of the fabric, and the fabric has strong fiber continuity and good mechanical property.
In the technical solution, preferably, the following steps are further performed after the weaving of the thin-walled area of the revolving shell fabric is completed:
and removing the positioning device, and penetrating normal yarns into the position of the positioning device on the cylindrical structure to seal.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention relates to a method for weaving a rotary shell fabric in a capping way, which comprises the steps of firstly weaving a cylindrical structure with the thickness of the capping thickness by mounting a positioning device on a core mould and taking the positioning device as an auxiliary core mould support, then gradually reducing the thickness of the cylindrical structure while enlarging the diameter of the cylindrical structure, and transiting the thick top of a capping area to be consistent with the thickness of a thin-wall area to form a transition area so as to complete the weaving of the whole capping area;
2. according to the method for weaving the revolving shell fabric in the top sealing manner, warp yarns are quickly fixed by weft yarns in the circumferential direction of the positioning device through the support of the positioning device, so that a stable interweaving structure is formed, and the weaving process of the revolving shell fabric in the top sealing area is simpler and is easy to operate; the positioning device is used as the center, warp yarns and weft yarns are uniformly distributed on the circumference of the positioning device to form a cylinder, new warp yarns are added among warp yarn rows when the diameter of the cylinder is continuously enlarged by adding the weft yarns, and the uniformity of fibers in a thick top area and the uniformity of warp density and weft density of a cylindrical structure in a top sealing area in the fabric are ensured;
3. the method for weaving the revolving shell fabric comprises the steps of gradually reducing the thickness of a transition area structure around a cylindrical structure of a top sealing area by changing one or a combination of several methods of interweaving warp yarns and weft yarns, changing the weft winding amount of the warp yarns and reducing the number of layers of the warp yarns to gradually reduce the thickness of the transition area structure to be consistent with the thickness of a lower thin-wall area, and then continuously weaving the thin-wall area, so that the continuity of fibers of the top sealing area and the thin-wall area and the mechanical property of a structure at the joint of the top sealing area and the thin-wall area can be ensured;
4. the top-sealing weaving method of the rotary shell fabric carries out continuous integral weaving forming on the top-sealing area and the lower thin-wall area of the fabric, and the fabric has strong fiber continuity and good mechanical property.
Drawings
Fig. 1 is a top view of a cylindrical fabric in a closed-top weaving method of a revolving shell fabric according to a first embodiment and a second embodiment of the present invention;
FIG. 2 is a top view of a revolving shell fabric in the first and second embodiments of the present invention, after new warp yarns are added, the new warp yarns are fixed by a second row of weft yarns;
fig. 3 is a perspective view of a cylindrical fabric in the closed-top weaving method of a revolving shell fabric according to the first and second embodiments of the present invention;
FIG. 4 is a perspective view of a revolving shell fabric in the first and second embodiments of the present invention, after new warp yarns are added, the new warp yarns are fixed by a second row of weft yarns;
FIG. 5 is a cross-sectional view of a cylindrical fabric in a closed-top weaving method of a revolving shell fabric according to a first embodiment of the present invention;
FIG. 6 is a schematic diagram showing the manner of changing the interlacing structure of warp and weft yarns in steps S7-S8 in the top-sealed weaving method of the revolving shell fabric according to the first embodiment of the present invention;
FIG. 7 is a schematic diagram showing the manner of changing the interlacing structure of warp and weft yarns in steps S11-S12 in the first embodiment and steps S7-S8 in the second embodiment of the present invention;
FIG. 8 is a schematic diagram showing the manner of changing the interlacing structure of warp and weft yarns in steps S15-S16 in the first embodiment and steps S11-S12 in the second embodiment of the present invention;
FIG. 9 is a sectional view of a cylindrical fabric in the closed-top weaving method of a revolving shell fabric according to the second embodiment of the present invention;
fig. 10 is a cross-sectional view showing the overall structure of the fabric of the rotary shell according to the first and second embodiments of the present invention.
Wherein: 1-warp yarns; 2-first row of weft yarns; 3-a positioning device; 4-triangular area; 5-circular cylindrical structure; 6-second row of weft yarns; 7-new warp column; 8-a transition region; 9-capping area; 10-thin wall area.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The embodiment is a quartz fiber rotary shell capping fabric, the thickness of a cylindrical structure in a capping area at the top of the fabric is 45mm, the diameter of the cylindrical structure is 70mm, the thickness of a thin-wall area is 25mm, the diameter of the bottom end of the thin-wall area is 300mm, and the total height of the fabric is 200 mm. The process parameter design is shown in table 1.
TABLE 1 Quartz capping fabric parameter Table
The method for weaving the rotary shell fabric by means of capping comprises the following specific steps:
s1, arranging a positioning device at the top of a core mold;
in this embodiment, the following steps are specifically performed: mounting a weaving core mould to a weaving platform, and mounting a positioning device 3 to the central position of the top end of the core mould, wherein the positioning device is a cylinder with the diameter of 1.5mm, and the height of the cylinder is more than 45 mm;
s2, weaving a cylindrical structure by taking the positioning device as a center; the method comprises the following steps:
s2a, arranging a plurality of warp layers around the positioning device, wherein each warp layer is provided with a plurality of rows of warps, and the warps are arranged in the circumferential direction of the positioning device by taking the positioning device as the center and extend outwards;
as a specific implementation manner of this embodiment, specifically, the following are implemented: selecting 570tex quartz fiber, arranging 33 layers of warp yarn layers on a weaving machine, and arranging a plurality of rows of warp yarns 1 along the circumferential direction of a positioning device by taking the positioning device 3 as a center according to the selected warp density and each layer of warp yarn layer as shown in figures 1 and 3;
s2b, introducing a first row of circular weft yarns at the periphery of the positioning device to fix the warp yarns by the first row of weft yarns;
as a specific implementation manner of this embodiment, specifically, the following are implemented: changing the height of the loom, and introducing a first row of weft yarns 2 into each warp yarn layer one by one from bottom to top in a circumferential manner, so that the warp yarns 1 are fixed by the first row of weft yarns 2, and the first row of weft yarns 2 are supported by a positioning device 3 and wound on the periphery of the positioning device 3 to form a circular cylindrical structure 5 with the thickness of 45mm, as shown in fig. 3;
s2c, introducing a second row of circular weft yarns between warp yarn layers, winding the warp yarns and the second row of weft yarns to form an interwoven structure, wherein the second row of weft yarns and the first row of weft yarns are concentric circles, adding a new warp yarn row in each warp yarn layer, and fixing the new warp yarn row through the second row of weft yarns;
as a specific implementation manner of this embodiment, specifically, the following are implemented: changing the loom in high and low positions to form sheds among warp yarns, and introducing a second row of weft yarns 6 into the sheds of each warp yarn layer from bottom to top, wherein the second row of weft yarns 6 and the first row of weft yarns 2 are concentric circles, so that the diameter of the circular cylindrical structure 5 is increased, and the cross-sectional view of the interweaving structure of the warp yarns and the weft yarns is shown in FIG. 5; introducing a new 570tex warp row 7 between adjacent warp rows in each warp layer (e.g. triangular area 4 in figures 2, 4) to ensure that the warp density is maintained at 8/cm and that the new warp row 7 is held by the second weft row 6;
s2d, repeating the step S2c, and weaving to form a cylindrical structure
As a specific implementation manner of this embodiment, specifically, the following are implemented: repeating the step S2c to continuously weave the cylindrical structure until the diameter of the cylindrical structure is 40 mm;
s3, continuously weaving a transition region around the cylindrical structure, enabling the diameter of the transition region to be the diameter required by the capping structure, and gradually reducing the thickness of the transition region to the thickness of the thin wall of the rotary shell to complete the capping region weaving of the rotary shell fabric;
as a specific implementation manner of this embodiment, specifically, the following are implemented:
continuously weaving a transition area around the cylindrical structure, changing the height of a weaving machine, introducing weft yarns into a warp yarn layer one by one from bottom to top in an annular manner, forming an interweaving structure of the warp yarns and the weft yarns by weft insertion of a stacking structure as shown in the left side of the figure 6, and increasing the diameter of the transition area by the weft winding amount of 4 wefts;
continuously weaving the transition area, changing the low position of the weaving machine, introducing weft yarns into the warp yarn layers one by one from bottom to top in a circular mode, enabling the interweaving structure and the weft winding amount of the warp yarns and the weft yarns to be consistent with those in the step S6, enabling the diameter of the transition area to be increased, and meanwhile adding new 570tex warp yarn rows between every two adjacent warp yarn rows;
the height of the weaving machine is changed, weft yarns are introduced into a warp layer one by one from bottom to top in a circumferential mode, the interweaving structure of the warp yarns and the weft yarns is changed into a weft insertion structure with a stacking structure as shown in the right side of the figure 6, the weft winding amount is 4 wefts, the diameter of a transition area is increased, and the thickness is reduced;
changing the low position of the weaving machine, introducing weft yarns into the warp yarn layers one by one from bottom to top in a circular mode, enabling the interweaving structure and the weft winding amount of the warp yarns and the weft yarns to be consistent with those in the step S8, enabling the diameter of a transition area to be increased, and meanwhile adding new 570tex warp yarn rows between every two adjacent warp yarn rows;
the height of the weaving machine is changed, weft yarns are introduced into a warp layer one by one from bottom to top in a circumferential mode, the interweaving structure of the warp yarns and the weft yarns is changed into weft insertion through a stacking structure as shown in the left side of the figure 7, the weft winding amount is changed into 3 weft yarns, the diameter of a transition area is increased, and the thickness is reduced;
changing the low position of the weaving machine, introducing weft yarns into the warp yarn layers one by one from bottom to top in a circular mode, enabling the interweaving structure and the weft winding amount of the warp yarns and the weft yarns to be consistent with those in the step S10, enabling the diameter of a transition area to be increased, and meanwhile adding new 570tex warp yarn rows between every two adjacent warp yarn rows;
the height of the weaving machine is changed, weft yarns are introduced into the warp yarn layers one by one from bottom to top in a circumferential mode, the interweaving structure of the warp yarns and the weft yarns is changed into a weft insertion structure with a stacking structure as shown in the right side of the figure 7, the weft winding amount is 3 wefts, the diameter of a transition area is increased, and the thickness is reduced;
changing the low position of the weaving machine, introducing weft yarns into the warp yarn layers one by one from bottom to top in a circular mode, enabling the interweaving structure and the weft winding amount of the warp yarns and the weft yarns to be consistent with those in the step S12, enabling the diameter of a transition area to be increased, and meanwhile adding new 570tex warp yarn rows between every two adjacent warp yarn rows;
the height of the weaving machine is changed, weft yarns are introduced into a warp layer one by one from bottom to top in a circumferential mode, the interweaving structure of the warp yarns and the weft yarns is changed into weft insertion through a left stacking structure as shown in figure 8, the weft winding amount is changed into 2 wefts, the diameter of a transition area is increased, and the thickness is reduced;
changing the low position of the weaving machine, introducing weft yarns into the warp yarn layers one by one from bottom to top in a circular mode, enabling the interweaving structure and the weft winding amount of the warp yarns and the weft yarns to be consistent with those in the step S14, enabling the diameter of a transition area to be increased, and meanwhile adding new 570tex warp yarn rows between every two adjacent warp yarn rows;
the height of the weaving machine is changed, weft yarns are introduced into a warp layer one by one from bottom to top in a circumferential mode, the interweaving structure of the warp yarns and the weft yarns is changed into a weft insertion structure in a stacking structure as shown in the right side of the figure 8, the weft winding amount is 2 wefts, the diameter of a transition area is increased, and the thickness is reduced;
changing the low position of the weaving machine, introducing weft yarns into the warp yarn layers one by one from bottom to top in a circular mode, enabling the interweaving structure and the weft winding amount of the warp yarns and the weft yarns to be consistent with those in the step S16, enabling the diameter of a transition area to be increased, and meanwhile adding new 570tex warp yarn rows between every two adjacent warp yarn rows;
as in fig. 10, a transition zone 8 is formed, completing the weaving of the revolving shell capping zone 9;
s4, weaving a thin-wall area 10 of the rotary shell fabric below the capping area 9 of the rotary shell fabric by taking the core die as a die to obtain the rotary shell fabric;
s5, after the integral weaving is finished, the positioning device is taken out, and multi-ply yarns penetrate through the position of the positioning device on the cylindrical structure in the normal direction.
Example two
The embodiment is a glass fiber rotary shell capping fabric, the thickness of a cylindrical structure in a capping area at the top of the fabric is 26mm, the diameter of the cylindrical structure is 30mm, the thickness of a thin-wall area is 15mm, the diameter of the bottom end of the thin-wall area is 100mm, and the total height of the fabric is 150 mm. The process parameter design is shown in table 2.
TABLE 2 Quartz capping fabric parameter Table
The method for weaving the rotary shell fabric by means of capping comprises the following specific steps:
s1, arranging a positioning device at the top of a core mold;
as a specific implementation manner of this embodiment, specifically, the following are implemented: mounting a weaving core mould to a weaving platform, and mounting a positioning device 3 to the top end of the core mould, wherein the positioning device is a cylinder with the diameter of 1mm, and the height of the cylinder is more than 26 mm;
s2, use positioner as the center, weave the cylinder structure, include:
s2a, arranging a plurality of warp layers around the positioning device, wherein each warp layer is provided with a plurality of rows of warps, and the warps are arranged in the circumferential direction of the positioning device by taking the positioning device as the center and extend outwards;
as a specific implementation manner of this embodiment, specifically, the following are implemented: selecting 480tex glass fiber, arranging 30 layers of warp yarn layers on a weaving machine, and arranging a plurality of rows of warp yarns 1 along the circumferential direction of a positioning device by taking the positioning device 3 as a center according to the selected warp density and each layer of warp yarn layer as shown in figures 1 and 3;
s2b, introducing a first row of circular weft yarns at the periphery of the positioning device to fix the warp yarns by the first row of weft yarns;
as a specific implementation manner of this embodiment, specifically, the following are implemented: changing the height of the loom, and introducing a first row of weft yarns 2 into each warp yarn layer one by one from bottom to top in a circumferential manner, so that the warp yarns 1 are fixed by the first row of weft yarns 2, and the first row of weft yarns 2 are supported by a positioning device 3 and wound on the periphery of the positioning device 3 to form a circular thin column structure with the thickness of 26mm, as shown in fig. 3;
s2c, introducing a second row of circular weft yarns between warp yarn layers, winding the warp yarns and the second row of weft yarns to form an interwoven structure, wherein the second row of weft yarns and the first row of weft yarns are concentric circles, adding a new warp yarn row in each warp yarn layer, and fixing the new warp yarn row through the second row of weft yarns;
as a specific implementation manner of this embodiment, specifically, the following are implemented: changing the high position and the low position of a weaving machine to form a shed among warp yarns, and from bottom to top, introducing a second row of weft yarns 6 into the shed of each warp yarn layer in an annular manner, wherein the second row of weft yarns 6 and the first row of weft yarns 2 are concentric circles, so that the diameter of the circular cylindrical structure 5 is increased, and the interweaving structure of the warp yarns and the weft yarns is as shown in figure 9; introducing a new row of 480tex warp yarns 7 between adjacent warp yarn rows in each warp yarn layer (e.g. triangular area 4 in figures 2, 4) to ensure that the warp density is maintained at 10/cm and the new warp yarn row 7 is held by the second row of weft yarns 6;
s2d, repeating the step S2c, and weaving to form a cylindrical structure;
as a specific implementation manner of this embodiment, specifically, the following are implemented: repeating the step S4 to continuously weave until a cylindrical structure with the diameter of 30mm is formed;
s3, continuously weaving a transition region around the cylindrical structure, enabling the diameter of the transition region to be the diameter required by the capping structure, and gradually reducing the thickness of the transition region to the thickness of the thin wall of the rotary shell to complete the capping region weaving of the rotary shell fabric;
as a specific implementation manner of this embodiment, specifically, the following are implemented:
continuously weaving a transition area around the cylindrical structure, changing the height of a weaving machine, introducing weft yarns into a warp yarn layer one by one from bottom to top in an annular manner, forming an interweaving structure of the warp yarns and the weft yarns by weft insertion of a stacking structure as shown in the left side of a figure 7, and increasing the diameter of the transition area by 3 weft winding;
continuously weaving the transition area, changing the low position of the weaving machine, introducing weft yarns into the warp yarn layers one by one from bottom to top in a circular mode, enabling the interweaving structure and the weft winding amount of the warp yarns and the weft yarns to be consistent with those in S6, enabling the diameter of the transition area to be increased, and meanwhile adding new 480tex warp yarn rows between adjacent warp yarn rows;
the height of the weaving machine is changed, weft yarns are introduced into the warp yarn layers one by one from bottom to top in a circumferential mode, the interweaving structure of the warp yarns and the weft yarns is changed into a weft insertion structure with a stacking structure as shown in the right side of the figure 7, the weft winding amount is 3 wefts, the diameter of a transition area is increased, and the thickness is reduced;
changing the low position of the loom, introducing weft yarns into the warp yarn layers one by one from bottom to top in a circular manner, wherein the interweaving structure and the weft winding amount of the warp yarns and the weft yarns are consistent with those in S8, so that the diameter of a transition area is increased, and simultaneously, adding a new 480tex warp yarn row between adjacent warp yarn rows;
the height of the weaving machine is changed, weft yarns are introduced into a warp layer one by one from bottom to top in a circumferential mode, the interweaving structure of the warp yarns and the weft yarns is changed into weft insertion through a left stacking structure as shown in figure 8, the weft winding amount is changed into 2 wefts, the diameter of a transition area is increased, and the thickness is reduced;
changing the low position of the loom, introducing weft yarns into the warp yarn layers one by one from bottom to top in a circular manner, wherein the interweaving structure and the weft winding amount of the warp yarns and the weft yarns are consistent with those in S10, so that the diameter of a transition area is increased, and simultaneously, adding a new 480tex warp yarn row between adjacent warp yarn rows;
the height of the weaving machine is changed, weft yarns are introduced into a warp layer one by one from bottom to top in a circumferential mode, the interweaving structure of the warp yarns and the weft yarns is changed into a weft insertion structure in a stacking structure as shown in the right side of the figure 8, the weft winding amount is 2 wefts, the diameter of a transition area is increased, and the thickness is reduced;
changing the low position of the loom, introducing weft yarns into the warp yarn layers one by one from bottom to top in a circular manner, wherein the interweaving structure and the weft winding amount of the warp yarns and the weft yarns are consistent with those in S12, so that the diameter of a transition area is increased, and simultaneously, adding a new 480tex warp yarn row between adjacent warp yarn rows;
as in fig. 10, a transition zone 8 is formed, completing the weaving of the revolving shell capping zone 9;
s4, weaving a thin-wall area 10 of the rotary shell fabric below the capping area 9 of the rotary shell fabric by taking the core die as a die to obtain the rotary shell fabric;
s5, after the integral weaving is finished, the positioning device is taken out, and multi-ply yarns penetrate through the position of the positioning device on the cylindrical structure in the normal direction.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (8)
1. A capping weaving method of a rotary shell fabric is characterized by comprising the following steps:
s1, arranging a positioning device at the top of a core mold;
s2, weaving a cylindrical structure by taking the positioning device as a center, wherein the step S2 specifically comprises the following steps:
s2a, arranging a plurality of warp layers around the positioning device, wherein each warp layer is provided with a plurality of rows of warps, and the warps are arranged in the circumferential direction of the positioning device by taking the positioning device as the center and extend outwards;
s2b, introducing a first row of circular weft yarns at the periphery of the positioning device, and enabling the warp yarns to be fixed by the first row of weft yarns;
s2c, introducing a second row of circular weft yarns between the warp yarn layers, winding the warp yarns and the second row of weft yarns to form an interwoven structure, wherein the second row of weft yarns and the first row of weft yarns are concentric circles, adding a new warp yarn row in each warp yarn layer, and fixing the new warp yarn row through the second row of weft yarns;
s2d, repeating the step S2c, and weaving to form the cylindrical structure;
s3, weaving a transition area around the cylindrical structure, enabling the diameter of the transition area to be the diameter required by a capping structure, gradually reducing the thickness of the transition area to be consistent with the thickness of a thin-wall area of the rotary shell, and finishing the capping area weaving of the rotary shell fabric, wherein when the transition area is woven in the step S3, the gradually reducing of the thickness of the transition area is realized by alternately using a method of changing an interweaving structure of warp yarns and weft yarns and changing the weft winding amount of the warp yarns.
2. The closed-top weaving method of a revolving shell fabric according to claim 1, characterized in that: adding a new warp column in step S2c is specifically adding the same number of new warp columns between every two adjacent warp columns.
3. The closed-top weaving method of a revolving shell fabric according to claim 2, characterized in that: the number of the new warp columns added between the adjacent warp columns is 1-2 columns.
4. A closed-end weaving method of a rotary shell fabric according to any one of claims 1 to 3, characterized in that: the positioning device is cylindrical, and the diameter of the positioning device is 0.5-1.5 mm.
5. A closed-end weaving method of a rotary shell fabric according to any one of claims 1 to 3, characterized in that: the thickness of the cylindrical structure is 1-100 mm.
6. A closed-end weaving method of a rotary shell fabric according to any one of claims 1 to 3, characterized in that: the cylindrical structure, the transition area and the thin-wall area of the revolving shell fabric are all 2.5D textile structures.
7. A weaving method of a rotary shell fabric is characterized in that: the closed-top weaving method of the revolving shell fabric according to any one of claims 1 to 3, wherein the weaving of the closed-top area of the revolving shell fabric is completed, and then the thin-walled area of the revolving shell fabric is woven under the closed-top area of the revolving shell fabric by using the core mold as a mold, thereby obtaining the revolving shell fabric.
8. The method of weaving a revolving shell fabric according to claim 7, characterized in that the following further steps are performed after the weaving of the thin-walled area of the revolving shell fabric is completed:
and removing the positioning device, and penetrating normal yarns into the position of the positioning device on the cylindrical structure to seal.
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| CN113136646B (en) * | 2021-03-01 | 2022-09-09 | 西安理工大学 | Method for customizing protective equipment product in personalized mode |
| CN115045038A (en) * | 2022-07-26 | 2022-09-13 | 山东中恒景新碳纤维科技发展有限公司 | Preparation method of full-closed-top woven part and preparation method of composite material part thereof |
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