CN113481649B - Sandwich structure fabric and weaving method thereof - Google Patents
Sandwich structure fabric and weaving method thereof Download PDFInfo
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- CN113481649B CN113481649B CN202110832712.XA CN202110832712A CN113481649B CN 113481649 B CN113481649 B CN 113481649B CN 202110832712 A CN202110832712 A CN 202110832712A CN 113481649 B CN113481649 B CN 113481649B
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- 239000004744 fabric Substances 0.000 title claims abstract description 332
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000009941 weaving Methods 0.000 title claims abstract description 26
- 238000009940 knitting Methods 0.000 claims abstract description 144
- 239000000463 material Substances 0.000 claims description 10
- 230000003068 static effect Effects 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 24
- 239000003086 colorant Substances 0.000 description 18
- 239000002994 raw material Substances 0.000 description 15
- 229910052742 iron Inorganic materials 0.000 description 12
- 238000010586 diagram Methods 0.000 description 8
- 210000002268 wool Anatomy 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 5
- 239000004753 textile Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 2
- 235000015220 hamburgers Nutrition 0.000 description 2
- 238000009958 sewing Methods 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/22—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/10—Patterned fabrics or articles
- D04B1/12—Patterned fabrics or articles characterised by thread material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Of Fabric (AREA)
Abstract
The invention discloses a sandwich structure fabric which comprises an upper fabric layer, a lower fabric layer and a middle fabric layer, wherein the upper fabric layer is woven by first yarns, the middle fabric layer is woven by second yarns, the lower fabric layer is woven by third yarns, and the middle fabric layer is arranged between the upper fabric layer and the lower fabric layer. The invention also discloses a weaving method of the sandwich structure fabric, which comprises the following steps: s1, selecting a double-needle bed flat knitting machine, opening a front needle bed and a rear needle bed to knit triangles, and knitting a plurality of courses by using a third yarn to obtain a lower fabric layer; s2, closing a rear needle bed knitting triangle, replacing a yarn feeding nozzle, knitting by using a second yarn, and obtaining an intermediate fabric layer after knitting a plurality of courses; s3, replacing a yarn feeding nozzle, weaving through a front needle bed by using a first yarn, opening a rear needle bed to weave a triangle after weaving a plurality of courses, weaving a plurality of courses by using the first yarn, obtaining an upper fabric layer after weaving, and finishing to obtain the sandwich structure fabric.
Description
Technical Field
The invention belongs to the technical field of textile, and particularly relates to a sandwich structure fabric and a weaving method thereof.
Background
With the development of textile science and technology, the application of textile fabrics in the industry field is more and more extensive, and the developed fabrics also show excellent performance and characteristics, especially three-dimensional fabrics. On the hundred degrees encyclopedia, the sandwich fabric is a synthetic fabric woven by a warp knitting machine and consists of an upper surface, a middle surface and a lower surface. The surface is a mesh design fabric layer, the middle is a connecting yarn, the bottom surface is a densely woven flat plate surface, and the fabric is used for automobile cushions, sport uppers and the like. Although this type of fabric is called as a "sandwich fabric", it is different from a sandwich three-layer structure, especially a "connecting yarn" of a middle layer, and cannot truly exert its performance, that is, it is difficult to realize a sandwich structure in a practical sense by using a woven fabric and a conventional knitted structure.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a sandwich structure fabric and a weaving method thereof.
The first object of the invention is to provide a sandwich structure fabric, which comprises an upper fabric layer, a lower fabric layer and a middle fabric layer, wherein the upper fabric layer is woven by first yarns, the middle fabric layer is woven by second yarns, the lower fabric layer is woven by third yarns, the middle fabric layer is arranged between the upper fabric layer and the lower fabric layer, and the upper fabric layer, the lower fabric layer and the middle fabric layer are integrally formed.
Preferably, the number of layers of the intermediate fabric layer is at least 1.
Preferably, the number of layers of the intermediate fabric layer is an odd number.
The second object of the present invention is to provide a weaving method of the sandwich structure fabric, which comprises the following steps:
s1, selecting a double-needle bed flat knitting machine, introducing a third yarn into a knitting area through a yarn feeding nozzle, simultaneously opening a front needle bed knitting triangle and a rear needle bed knitting triangle, and alternately knitting a plurality of courses through the front needle bed and the rear needle bed by using the third yarn in all the needle lifting ranges of a longitudinal row to obtain a lower fabric layer;
s2, closing a knitting triangle of the rear needle bed, replacing a yarn feeding nozzle, introducing second yarns into a knitting loop area through the yarn feeding nozzle, continuously knitting with the second yarns through the front needle bed and then the lower fabric layer, wherein in the knitting process, the lower fabric layer is static on the needle bed, the knitted part of the front needle bed is continuously piled up at a knitting opening, a supporting rod which is larger than the width of the fabric is transversely arranged at the knitting opening, a certain vertical pulling force is applied to the supporting rod, and after a plurality of courses are knitted, the middle fabric layer connected with the lower fabric layer is obtained, the number of layers of the middle fabric layer is at least one layer, and the number of layers of the middle fabric layer is an odd number layer;
s3, replacing a yarn feeding nozzle, leading first yarns into a knitting loop forming area through the yarn feeding nozzle, continuously knitting through a front needle bed and then a middle fabric layer by using the first yarns, obtaining an upper fabric layer connected with the middle fabric layer after knitting a plurality of courses, then opening a rear needle bed knitting triangle, continuously knitting the upper fabric layer and the middle fabric layer through the front needle bed and the rear needle bed by using the first yarns and then the upper fabric layer in turn, sewing the upper fabric layer and the middle fabric layer, forming a first tubular structure between the upper fabric layer and the middle fabric layer, removing supporting rods, and finishing the upper fabric layer, the lower fabric layer and the middle fabric layer to obtain the sandwich structure fabric.
Preferably, in step S2, the color and the material of the second yarn are changed during the process of knitting the second yarn into a plurality of courses.
Preferably, in step S3, the color and the material of the first yarn are replaceable during the process of knitting the first yarn into a plurality of courses.
Preferably, in step S2, when the number of layers of the intermediate fabric layer is greater than one, after the intermediate fabric layer of the subsequent layer is woven, the back needle bed knitting triangle is opened, and the intermediate fabric layer of the subsequent layer and the intermediate fabric layer of the previous layer are stitched by alternately knitting a plurality of courses through the front and back needle beds by using the second yarn, so that the intermediate fabric layer of the subsequent layer and the intermediate fabric layer of the previous layer form a second tubular structure.
Preferably, the number of layers of the intermediate fabric layer of the latter layer is an even number.
Preferably, after the second tubular structure is formed, the knitting triangle of the rear needle bed is closed, the front needle bed is continuously utilized to knit the next intermediate fabric layer, and the support rod is placed at the knitting opening again in the knitting process and a certain vertical pulling force is applied to the support rod.
Preferably, in step S3, the finishing of the upper fabric layer, the lower fabric layer and the middle fabric layer is specifically to make the first tubular structure and the second tubular structure fall to the direction of the lower fabric layer, and make the first tubular structure and the second tubular structure all located right above the lower fabric layer, and then flattening and finishing.
Compared with the prior art, the invention has the beneficial effects that:
(1) The sandwich structure fabric provided by the invention is an integrally formed three-dimensional multi-layer fabric, is very similar to the structure of a sandwich hamburger, the middle layer, the upper fabric layer and the lower fabric layer can be respectively made of different raw materials, parameters such as yarn counts, tissue structures and the like can be adjusted according to requirements, so that different multi-layer structures of the fabric can be truly realized, and the sandwich structure fabric can be widely applied to the field of industrial textiles;
(2) The sandwich structure fabric provided by the invention is integrally formed, is more suitable for being used as a composite material reinforcement or a prefabricated member, and can be provided with parameters such as raw materials, tissue structures and the like of different layers according to different application requirements so as to play a role;
(3) The sandwich structure fabric provided by the invention not only shows good plasticity of the wool fabric, but also greatly enriches the product types of the wool spinning industry, and lays a foundation for the industrial application of the wool fabric;
drawings
Fig. 1 is a schematic structural diagram of a sandwich-structured fabric provided in embodiment 1 of the present invention;
fig. 2 is a schematic diagram of a sandwich fabric formed by finishing a first tubular fabric according to embodiment 1 of the present invention;
fig. 3 is a schematic weaving diagram of a sandwich fabric provided in embodiment 1 of the present invention;
fig. 4 is a schematic diagram of a knitting process of the sandwich structure fabric provided in embodiment 1 of the present invention by using a double needle bed flat knitting machine;
fig. 5 is a schematic structural diagram of a sandwich-structured fabric provided in embodiment 2 of the present invention;
fig. 6 is a schematic structural diagram of a sandwich-structured fabric provided in embodiment 3 of the present invention;
fig. 7 is a schematic structural diagram of a sandwich-structured fabric provided in embodiment 4 of the present invention;
fig. 8 is a schematic structural diagram of a sandwich-structured fabric provided in embodiment 5 of the present invention;
in the figure: 1. a top material layer; 2. a lower material layer; 3. and (5) a middle fabric layer.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example 1
As shown in fig. 1, the sandwich fabric provided by the embodiment of the invention specifically includes an upper fabric layer 1, a lower fabric layer 2 and a middle fabric layer 3, wherein the upper fabric layer 1 is woven by first yarns, the middle fabric layer 3 is woven by second yarns, the lower fabric layer 2 is woven by third yarns, the middle fabric layer 3 is arranged between the upper fabric layer 1 and the lower fabric layer 2, and the upper fabric layer 1, the lower fabric layer 2 and the middle fabric layer 3 are integrally formed. In the embodiment of the invention, the number of layers of the intermediate fabric layer is 1, the first yarn, the second yarn and the third yarn are all yarns with the same material, the yarns with the corresponding materials, such as blended wool yarn, aramid fiber, polysulfonamide and the like, can be selected according to actual needs, the first yarn and the third yarn adopt the same color, the second yarn selects one yarn with different colors from the first yarn and the third yarn, and the color is selected according to actual needs. The sandwich structure fabric is obtained by weaving and finishing a three-dimensional fabric of a flat knitting machine, and the structure of the fabric is similar to a hamburger.
As shown in fig. 2, the sandwich structure fabric provided by the embodiment of the invention is integrally formed, and the whole sandwich structure fabric is made by arranging the lower fabric layer 2 and the first tubular structure fabric, wherein one half of the first tubular structure fabric is the upper fabric layer 1, the other half is the middle fabric layer 3 in the sandwich structure fabric, when the first tubular structure fabric is woven, the weaving transverse row of the whole tubular structure fabric is divided into two parts, the first weaving half transverse row is the middle fabric layer 3 of the sandwich structure fabric, the later weaving half transverse row is the upper fabric layer 1 of the sandwich structure fabric, and the materials and the colors of yarns selected by the upper fabric layer 1 and the lower fabric layer 2 are the same.
As shown in fig. 3 and fig. 4, the sandwich fabric provided in the embodiment of the present invention takes a cycle of a course of the ground fabric 30 as an example, and 93 courses are required for completing a complete first tubular structure knitting, and the knitting method specifically includes the following steps:
s1, selecting a double-needle bed flat knitting machine, introducing a third yarn into a knitting area through a yarn feeding nozzle in all the needle lifting ranges of 1-60 longitudinal rows (taking 60 needles as an example), simultaneously opening knitting cams of a front needle bed and a rear needle bed, and knitting front 30 courses and four flat knitting through the front needle bed and the rear needle bed in turn by using the third yarn in all the needle lifting ranges of the longitudinal rows to obtain a lower fabric layer 2 (namely, a base fabric in fig. 4) as shown in fig. 4 (a);
s2, after finishing knitting of the 30 th course, closing a rear needle bed knitting triangle, as shown in fig. 4 (b), replacing a yarn feeding nozzle, introducing a second yarn into a knitting loop forming area through the yarn feeding nozzle, continuing knitting of the 31 st-60 th course by using the second yarn through a front needle bed and then a lower fabric layer, as shown in fig. 4 (c), enabling a lower fabric layer to be static on the needle bed in the knitting process, enabling a fabric to float at a knitting opening due to continuous accumulation of a knitted part of the front needle bed, transversely placing a fine iron rod with the width larger than the fabric at the knitting opening, as shown in fig. 4 (d), respectively hanging weights on two sides of the fine iron rod to apply certain vertical traction force, as shown in fig. 4 (e), and obtaining an intermediate fabric layer 3 connected with the lower fabric layer 2 after knitting of the 60 th course;
s3, after knitting of the 60 th course is completed, a yarn feeding nozzle is replaced, the first yarn is led into a knitting area through the yarn feeding nozzle, knitting of the 61 st-90 th course is continuously carried out by the first yarn through a front needle bed and then a middle layer, after knitting of the 90 th course, an upper fabric layer 1 connected with the middle fabric layer 3 is obtained, then a rear needle bed knitting triangle is opened, the upper fabric layer 1 and the middle fabric layer 3 are continuously stitched by the first yarn and then the upper fabric layer 1 are alternately knitted through the front needle bed and the rear needle bed for 3 courses, the upper fabric layer 1 and the middle fabric layer 3 form a first tubular structure, as shown in fig. 4 (f), after knitting is completed, a fine iron rod is removed, the upper fabric layer 1, the lower fabric layer 2 and the middle fabric layer 3 are finished, specifically, a first tubular structure formed by the upper fabric layer 1 and the middle fabric layer 3 is reversed to the direction of the lower fabric layer, the first tubular structure is positioned right above the lower fabric layer, and then the upper fabric layer, the lower fabric layer and the middle fabric layer are flattened and finished, and the sandwich structure fabric is obtained.
The sandwich structure fabric provided by the embodiment 1 of the invention is used in the field of composite materials, and has two uses, one uses as a matrix, resin is required to be compounded outside the sandwich structure fabric to obtain a resin-based composite material laminated board when the sandwich structure fabric is used, and the other uses directly as a prefabricated member, and the prefabricated member can be directly hot-pressed into a laminated board, so that the sandwich structure fabric obtained by the embodiment 1 of the invention cannot be scattered when the sandwich structure fabric is used.
Example 2
As shown in fig. 5, the structure of the sandwich fabric provided in the embodiment of the present invention is the same as that of the sandwich fabric provided in embodiment 1, and the difference is that the second yarns may be two yarns with different colors, and the structure of the obtained intermediate fabric layer 3 is designed to be one by changing the yarns with different colors at intervals in the weaving process of the intermediate fabric layer 3, and the interval length can be achieved by adjusting the number of the woven courses. The embodiment of the invention is the same as the weaving method of embodiment 1, except that the step of step S2 is different, and the specific operation is as follows: after the 30 th course is knitted, the back needle bed knitting triangle is closed, the yarn feeding nozzle is replaced, the second yarn is led into the knitting area through the yarn feeding nozzle, the second yarn is led into the knitting area through the front needle bed and then the lower fabric layer, the lower fabric layer is static on the needle bed in the knitting process, the knitted part of the front needle bed can lead to the floating of the fabric at the knitting opening due to continuous accumulation, in order to solve the problem of unclear knitting opening, a thin iron rod with the width larger than the fabric is transversely placed at the knitting opening, weights are hung on two sides of the thin iron rod respectively to apply certain vertical pulling force, after a plurality of courses are knitted, the yarn feeding nozzle is replaced, another second yarn with different colors is selected, the second yarn with different colors is led into the knitting area through the yarn feeding nozzle, the second yarn is led into the knitting area through the front needle bed and then the lower fabric layer, the second yarn is continuously knitted through the front needle bed and then the upper fabric layer, the color of the middle fabric layer is floated, in order of one by one is achieved, after the 60 th course is completed, the middle fabric layer 2 is connected with the middle fabric layer 3 is obtained.
Example 3
As shown in fig. 6, the structure of the sandwich fabric provided in the embodiment of the present invention is the same as that of the sandwich fabric provided in embodiment 1, and the difference is that the second yarn and the first yarn may be two yarns with different colors, and the interval length may be achieved by adjusting the number of courses of knitting by changing the yarns with different colors at intervals in the knitting process of the middle fabric layer 3 and the upper fabric layer 1, so that the structure of the obtained middle fabric layer 3 and the upper fabric layer 1 is designed to be one by one. The embodiment of the invention is the same as the weaving method of embodiment 1, except that steps S2 and S3 are different, and step S2 specifically operates as follows: after finishing knitting of the 30 th course, closing a rear needle bed knitting triangle, replacing a yarn feeding nozzle, leading a second yarn into a knitting area through the yarn feeding nozzle, continuously knitting a plurality of courses with the second yarn through a front needle bed and then a lower fabric layer, continuously knitting a plurality of courses with the second yarn through the front needle bed, continuously accumulating the front needle bed to cause the fabric to float at a knitting opening due to continuous accumulation of the knitted part of the front needle bed, transversely placing a thin iron rod with the width larger than the fabric at the knitting opening to solve the problem of unclear knitting opening, respectively hanging heavy weights on two sides of the thin iron rod to apply certain vertical pulling force, knitting a plurality of courses, replacing the yarn feeding nozzle, selecting another second yarn with different colors, leading the second yarn with different colors into the knitting area through the yarn feeding nozzle, continuously knitting the plurality of courses with the second yarn with different colors through the front needle bed, and then repeating the yarn replacing step to realize the one-by-one design of the color of the middle fabric layer 3, and obtaining the middle fabric layer 3 connected with the lower fabric layer 2 after finishing the 60 th course; step S3, after finishing knitting of the 60 th course, replacing a yarn feeding nozzle, leading the first yarn into a knitting area through the yarn feeding nozzle, continuously knitting the 61 th-90 th course by using the first yarn through a front needle bed and then a middle fabric layer, after knitting a plurality of courses, replacing the yarn feeding nozzle, selecting another first yarn with different colors, leading the first yarn with different colors into the knitting area through the yarn feeding nozzle, continuously knitting a plurality of courses by using the first yarn with different colors through the front needle bed, repeating the yarn replacing step, realizing the design of the color of the upper fabric layer 1, opening a rear needle bed knitting triangle after knitting the 90 th course, continuously knitting 3 courses by using the first yarn which is just used up through the front needle bed and the rear needle bed in turn, obtaining the upper fabric layer 1 connected with the middle fabric layer 3 after knitting, removing a fine iron rod, and finishing the upper fabric layer 1, the lower fabric layer 2 and the middle fabric layer 3, thus obtaining the sandwich structure fabric.
Example 4
As shown in fig. 7, the structure of the sandwich structure fabric provided in the embodiment of the present invention is the same as that of the sandwich structure fabric provided in embodiment 1, and the difference is that the number of layers of the middle fabric layer 2 is 3, the 3-layer fabric adopts two kinds of second yarns with different colors, and the two colors are designed at intervals on the 3-layer fabric, namely, the upper layer and the lower layer adopt the second yarns with the same color, and the middle layer adopts the second yarns with the other color. The embodiment of the invention is the same as the weaving method of embodiment 1, except that the step of step S2 is different, and the specific operation is as follows: after finishing knitting of the 30 th course, closing the knitting triangle of the back needle bed, changing the yarn feeding mouth, leading the second yarn into the knitting area through the yarn feeding mouth, continuously knitting a plurality of courses with the second yarn through the front needle bed and then the lower fabric layer, wherein the lower fabric layer is static on the needle bed in the knitting process, the knitted part of the front needle bed can lead the fabric to float at the knitting opening due to continuous accumulation, in order to solve the problem of unclear knitting opening, a thin iron rod with the width larger than the fabric is transversely arranged at the knitting opening, weights are respectively hung on two sides of the thin iron rod to apply certain vertical pulling force, after knitting a middle fabric layer, the yarn feeding mouth is changed, another second yarn with different colors is selected, the second yarn with different colors is led into the knitting area through the yarn feeding mouth, the knitting of the second fabric layer with the second yarn through the front needle bed is continuously knitted with the second yarn layer, after the knitting of the middle fabric layer of the second layer is finished, opening a back needle bed knitting triangle, knitting 3 courses through the front needle bed and the back needle bed in turn by utilizing the second yarn to the middle fabric layer of the second layer, sewing the middle fabric layer of the second layer and the middle fabric layer of the previous layer, enabling the middle fabric layer of the second layer and the middle fabric layer of the previous layer to form a second tubular structure, closing the back needle bed knitting triangle, replacing a yarn feeding nozzle, selecting the second yarn with the same color as the middle fabric layer of the first layer, guiding the second yarn into a knitting loop area through the yarn feeding nozzle, continuously utilizing the front needle bed by the second yarn to knit the middle fabric layer of the third layer, re-placing a supporting rod at a knitting opening in the knitting process, applying a certain vertical pulling force on the supporting rod, realizing the color-by-one design of the middle fabric layer of the third layer, and finishing the knitting of the middle fabric layer of the third layer, and 3, obtaining a three-layer middle fabric layer connected with the lower fabric layer, wherein in the step S3, the first tubular structure and the second tubular structure are inverted to the direction of the lower fabric layer when the upper fabric layer, the lower fabric layer and the middle fabric layer are finished, and the first tubular structure and the second tubular structure are positioned right above the lower fabric layer and then flattened and finished.
Example 5
As shown in fig. 8, the structure of the sandwich fabric provided in the embodiment of the present invention is the same as that of the sandwich fabric provided in embodiment 1, and the difference is that the number of layers of the middle fabric layer 2 is 3, and the 3-layer fabric adopts the second yarns with the same color. The embodiment of the invention is the same as the weaving method of embodiment 1, except that the step of step S2 is different, and the specific operation is as follows: after the 30 th course is knitted, the back needle bed knitting triangle is closed, the yarn feeding nozzle is replaced, the second yarn is led into the knitting area through the yarn feeding nozzle, the second yarn is used for continuously knitting a plurality of courses through the front needle bed and then the lower fabric layer, during the knitting process, the lower fabric layer is static on the needle bed, the fabric floats on the knitting opening due to continuous accumulation of the knitted part of the front needle bed, in order to solve the problem of unclear knitting opening, a thin iron rod with the width larger than the fabric is transversely arranged at the knitting opening, weights are respectively hung on two sides of the thin iron rod to apply certain vertical pulling force, after the first middle fabric layer is knitted, the second yarn with the same color is continuously used for continuously knitting the second middle fabric layer through the front needle bed, after the second middle fabric layer is knitted, the back needle bed is opened to knit the triangle, the middle fabric layer of the second layer is stitched with the middle fabric layer of the previous layer by alternately knitting 3 courses through the front needle bed and the back needle bed by utilizing the second yarn, the middle fabric layer of the second layer and the middle fabric layer of the previous layer form a second tubular structure, then the back needle bed knitting triangle is closed, knitting of the middle fabric layer of the third layer is continuously carried out by continuously utilizing the front needle bed by utilizing the second yarn with the same color, the support rod is placed at the knitting opening again in the knitting process, a certain vertical pulling force is applied on the support rod, after the knitting of the middle fabric layer of the third layer is completed, the three-layer middle fabric layer connected with the lower fabric layer is obtained, in the step S3, the first tubular structure and the second tubular structure are reversed to the direction of the lower fabric layer when the upper fabric layer, the lower fabric layer and the middle fabric layer are finished, and the first tubular structure and the second tubular structure are positioned right above the lower fabric layer, and then flattening and finishing. In practice the number of courses of each intermediate layer may be determined by the length of each intermediate layer.
In summary, when the actual fabric is woven, the raw materials of the weaving yarns can be combined to realize the weaving of the fabric with the sandwich structure with different performances, the raw materials of the upper fabric layer and the lower fabric layer can be selected as one type, the middle fabric layer can be selected as two different raw materials, the length of the middle fabric layer can be realized by adjusting the transverse row number of the weaving, the raw materials of the lower fabric layer can be selected as one type, the raw materials of the upper fabric layer and the middle fabric layer can be interchanged in a spaced state, and the length of the middle fabric layer can be realized by adjusting the transverse row number of the weaving; the sandwich structure can be regularly designed in the length direction, and can also be changed in the thickness direction, and the length, thickness, raw materials and the like of each section can be flexibly designed according to the needs. Meanwhile, when the actual fabric is woven, the number of layers of the middle fabric layer is multiple, so that the weaving of the fabric with the structure of the 'Jumbo sandwich' is realized, wherein the multiple layers of middle fabric layers can be made of different raw materials, the multiple layers of middle fabric layers can also be made of one raw material, and the upper fabric layer and the lower fabric layer are made of different raw materials. In the whole structural fabric, the raw materials with different layers and different positions can be changed according to the needs.
The sandwich structure fabric provided by the embodiment of the invention is an integrally formed three-dimensional multi-layer fabric, and different tissues, raw materials and the like can be flexibly selected for the fabrics of different layers, so that the sandwich structure fabric can be widely applied to the industrial field. By designing the tubular fabric of the single-sided flat knitting machine and adjusting yarn raw materials, thicknesses, tissue structures and the like of different parts and different tubular structures, the fabric with the sandwich structure and different styles can be manufactured. By designing the tubular fabric of the double-sided flat knitting machine and adjusting the raw materials, yarn counts, tissue structures and the like of fabrics with different layers, the 'giant and super' structural fabric with different effects can be manufactured. The development of the sandwich structure fabric provided by the embodiment of the invention not only shows good plasticity of the wool fabric, but also greatly enriches the product types of the wool spinning industry, and lays a foundation for the industrialized application of the wool fabric.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. The sandwich structure fabric comprises an upper fabric layer (1), a lower fabric layer (2) and an intermediate fabric layer (3), and is characterized in that the upper fabric layer (1) is woven by first yarns, the intermediate fabric layer (3) is woven by second yarns, the lower fabric layer (2) is woven by third yarns, the intermediate fabric layer (3) is arranged between the upper fabric layer (1) and the lower fabric layer (2), and the upper fabric layer (1), the lower fabric layer (2) and the intermediate fabric layer (3) are integrally formed;
the preparation method of the sandwich structure fabric comprises the following steps of:
s1, selecting a double-needle bed flat knitting machine, introducing a third yarn into a knitting forming area through a yarn feeding nozzle, simultaneously opening a front needle bed knitting triangle and a rear needle bed knitting triangle, and alternately knitting a plurality of courses through the front needle bed and the rear needle bed by using the third yarn in all the needle lifting ranges of a longitudinal row to obtain a lower fabric layer (2);
s2, closing a rear needle bed knitting triangle, replacing a yarn feeding nozzle, introducing second yarns into a knitting loop area through the yarn feeding nozzle, continuously knitting with the second yarns through a front needle bed and then a lower fabric layer, wherein in the knitting process, the lower fabric layer is static on the needle bed, the knitted part of the front needle bed is continuously piled up at a knitting opening, a supporting rod which is larger than the width of the fabric is transversely arranged at the knitting opening, a certain vertical pulling force is applied to the supporting rod, after a plurality of courses are knitted, an intermediate fabric layer (3) connected with the lower fabric layer (2) is obtained, the number of layers of the intermediate fabric layer (3) is at least one, and the number of layers of the intermediate fabric layer (3) is an odd number;
s3, replacing a yarn feeding nozzle, leading first yarns into a knitting loop forming area through the yarn feeding nozzle, continuously knitting through a front needle bed and then a middle fabric layer by using the first yarns, obtaining an upper fabric layer (1) connected with the middle fabric layer (3) after knitting a plurality of courses, then opening a rear needle bed knitting triangle, continuously knitting the upper fabric layer (1) and the middle fabric layer (3) through the front needle bed and the rear needle bed by continuously utilizing the first yarns and then the upper fabric layer (1) in turn, enabling the upper fabric layer (1) and the middle fabric layer (3) to form a first tubular structure, removing supporting rods, and finishing the upper fabric layer (1), the lower fabric layer (2) and the middle fabric layer (3) to obtain the sandwich structure fabric.
2. The sandwich fabric of claim 1, wherein in step S2, the color and material of the second yarn are changed during the knitting of the second yarn in the plurality of courses.
3. The sandwich fabric of claim 1, wherein in step S3, the color and material of the first yarn are changed during the weaving of the first yarn in the plurality of courses.
4. The sandwich fabric according to claim 1, wherein in step S2, when the number of layers of the middle fabric layer (3) is greater than one, after the knitting of the middle fabric layer of the next layer is completed, the back needle bed knitting triangle is opened, and the middle fabric layer (3) of the next layer is stitched to the middle fabric layer (3) of the previous layer by knitting a plurality of courses through the front and back needle beds in turn by using the second yarn, so that the middle fabric layer (3) of the next layer and the middle fabric layer (3) of the previous layer form a second tubular structure.
5. The sandwich structure fabric according to claim 4, wherein the number of layers of the intermediate fabric layer (3) of the subsequent layer is an even number.
6. The sandwich fabric according to claim 4, wherein after the second tubular structure is formed, the knitting triangle of the back needle bed is closed, knitting of the intermediate fabric layer (3) of the next layer is continued by using the front needle bed, and the support bar is replaced at the knitting opening during the knitting process, and a certain vertical pulling force is applied to the support bar.
7. The sandwich fabric according to claim 4, wherein in step S3, the upper fabric layer (1), the lower fabric layer (2) and the middle fabric layer (3) are finished by reversing the first tubular structure and the second tubular structure in the direction of the lower fabric layer (2), and the first tubular structure and the second tubular structure are located right above the lower fabric layer (2), and then flattening the first tubular structure and the second tubular structure.
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