Planar hoop fabric, planar fabric and production method

Abstract

A planar hoop fabric, a planar fabric and a production method, comprising the following steps: pre-folding the planar hoop fabric or the planar fabric to be woven and formed into n fan-shaped or rectangular fabrics to be woven and formed, wherein the angles of the n fan-shaped fabrics to be woven and formed are respectively a1, a2...an, and a1+a2+...+an=360°, or the n rectangular fabrics to be woven and formed have the same or different lengths, wherein n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1; pre-arranging warp yarns; sequentially inserting weft yarns according to a designed weft insertion method, and weaving the weft yarns and the pre-arranged warp yarns; and flattening the woven n fan-shaped or rectangular fabrics to weave a planar hoop fabric or planar fabric that meets the requirements. Compared with the prior art, the present invention not only quickly weaves the planar hoop fabric or planar fabric, but also increases the diversity of fabric patterns, and at the same time solves the problem of limited equipment capacity.

Description

Technical Field

[0001] The present invention relates to the field of textile technology, in particular to a planar hoop fabric, a planar fabric and a production method. Background Art

[0002] Planar hoop fabric is a circular fabric based on plane polar coordinate weaving, with the radial weaving yarns arranged in polar coordinates and the hoop weaving yarns wound in a circumferential direction. The structure of this fabric can be plain, twill, or satin. Compared with traditional rectangular coordinate woven fabrics, planar hoop fabrics do not require cutting of the load-bearing fibers and can better maintain the integrity of the fibers, thereby improving the dimensional stability and mechanical properties of the fabric. Planar hoop fabrics are often used as reinforcements for high-performance composite materials such as ceramic-based composites, carbon fiber-reinforced silicon carbide-based composites, and resin-based composites. Their excellent mechanical properties make them of great application value in high-tech fields such as aerospace and national defense.

[0003] Plane fabric refers to a two-dimensional structural fabric formed by interweaving warp yarns and weft yarns, whose surface is basically in the same plane, forming a flat fabric structure.

[0004] In the prior art, smaller planar fabrics or planar hoop fabrics can be woven. However, when encountering larger planar fabrics or planar hoop fabrics, the following problems arise: first, the weaving process occupies a large amount of space, which will cause the problem of limited equipment capacity; second, the pattern formed by the weaving is single and the weaving process is also slow.

[0005] Based on this, a planar hoop fabric, a planar fabric and a production method are designed. Summary of the Invention

[0006] The present invention is intended to overcome the defects in the above-mentioned prior art and provides a planar hoop fabric, a plane fabric and a production method. On the one hand, it increases the diversity of the patterns of the plane fabric and the plane hoop fabric while quickly weaving the planar hoop fabric and the plane fabric. On the other hand, it avoids the capacity limitation of the weaving equipment.

[0007] In order to achieve the above purpose, the technical solution adopted by the present invention is: a method for producing a planar hoop fabric, comprising the following steps:

[0008] Step 1: Pre-folding the planar hoop fabric to be woven into n fan-shaped fabrics to be woven, each fan-shaped fabric to be woven is a sheet fabric having m layers, and the angles of the n fan-shaped fabrics to be woven are a1, a2, ...an, a1 + a2 + ... + an = 360°, where n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1;

[0009] Step 2: Preset the warp arrangement. First, mark a main warp yarn as A. The main warp yarn A divides the fan-shaped fabric into two symmetrical sectors S1 and S2 with the same area. Other warp yarns B1, B2...Bn are woven in sequence along the length direction of the main warp yarn A at an angle to the main warp yarn A.

[0010] Step 3: Insert the weft in sequence according to the designed weft insertion method, and interweave the weft yarn with the preset warp yarn to complete the weaving;

[0011] Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform the corresponding operation if necessary;

[0012] Step 5: Repeat steps 3 and 4 until the desired length is reached;

[0013] Step 6: The n fan-shaped fabrics are woven flatly to weave a flat hoop fabric having n fan-shaped fabrics.

[0014] As a preferred solution of the present invention, the m layers of fabric are folded in step 1 in a forward symmetrical folding manner or a reverse symmetrical folding manner or a combination of the two.

[0015] As a preferred solution of the present invention, the warp yarns in step 2 are arranged in groups and in parallel, that is, the warp yarns are divided into x groups, x≥2, and the x groups of warp yarns are arranged in parallel up and down, and each group of warp yarns has y layers, y≥1.

[0016] As a preferred solution of the present invention, the warp yarns B1, B2...Bn woven into the sector S1 and the warp yarns B1, B2...Bn woven into the sector S2 are in opposite directions.

[0017] As a preferred embodiment of the present invention, the weft yarn is introduced in step 3 by a reciprocating continuous weft insertion method, and the weft yarn is reciprocatingly introduced layer by layer into each group of warp yarns according to the order of the warp yarn grouping. The weft insertion method is to first insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then insert the weft from the outer layer of the fabric to the inner layer of the fabric to ensure the continuity of the weft yarn.

[0018] As a preferred solution of the present invention, in step 3, each time the weft yarn is woven into one circle, a new weft yarn is introduced, and the weft yarn is woven with the warp yarn in sequence from the inside out.

[0019] A planar hoop fabric is woven by adopting the production method and is used as a turbine disk or flange in the aerospace field, or as a generator blade in the energy field.

[0020] As a preferred solution of the present invention, it comprises n sector-shaped fabrics woven in partitions, adjacent sector-shaped fabrics have dividing lines due to the partition weaving, and the angles of the n sector-shaped fabrics are a1, a2...an, a1+a2+...+an=360°.

[0021] A method for producing a flat fabric,

[0022] Step 1: pre-folding a planar fabric to be woven into n rectangular fabrics to be woven, each rectangular fabric to be woven is a sheet fabric having m layers, and the n rectangular fabrics to be woven have the same or different lengths, where n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1;

[0023] Step 2: Preset the warp arrangement. First, mark a main warp yarn as A. The main warp yarn A divides the rectangular fabric into two symmetrical rectangles S1 and S2 with the same area. Other warp yarns B1, B2...Bn are woven in sequence along the length direction of the main warp yarn A.

[0024] Step 3: Insert the weft in sequence according to the designed weft insertion method, and interweave the weft yarn with the preset warp yarn to complete the weaving;

[0025] Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform the corresponding operation if necessary;

[0026] Step 5: Repeat steps 3 and 4 until the desired length is reached;

[0027] Step 6: Spread out the woven n rectangular fabrics in a plane to weave a planar fabric having n rectangular fabrics.

[0028] As a preferred solution of the present invention, the warp yarns in step 2 are arranged in groups and in parallel, that is, the warp yarns are divided into x groups, x≥2, and the x groups of warp yarns are arranged in parallel up and down, and each group of warp yarns has y layers, y≥1.

[0029] As a preferred embodiment of the present invention, the weft yarn is introduced in step 3 by a reciprocating continuous weft insertion method, and the weft yarn is reciprocatingly introduced layer by layer into each group of warp yarns according to the order of the warp yarn grouping. The weft insertion method is to first insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then insert the weft from the outer layer of the fabric to the inner layer of the fabric to ensure the continuity of the weft yarn.

[0030] A planar fabric is woven by adopting the production method, and comprises a rectangular fabric woven from n partitions.

[0031] The beneficial effects of the present invention are:

[0032] 1. The present invention meets the forming requirements of two-dimensional planar hoop fabrics, can realize the diversification of fabric structures, and improve the designability of fabric structures to better meet the needs of different composite materials. The equipment can be used for fixed-length weaving as well as continuous weaving.

[0033] 2. The present invention adopts a grouped parallel warp yarn arrangement method and a reciprocating weft insertion method. By folding large-sized flat hoop fabrics and flat fabrics into smaller-sized fan-shaped fabrics and rectangular fabrics, it can realize the contour weaving of large-sized and large-diameter fabrics, solving the problem of equipment capacity limitations.

[0034] 3. The weft method of the present invention also includes introducing a new weft yarn every time a circle is woven, and any point on the weft introduction path is used as the weft yarn introduction point, and weaving with the warp yarn layer by layer from the inside to the outside or from the outside to the inside, which is conducive to weaving weft yarns of different tissues and different materials into the plane hoop fabric, increasing the diversity of the fabric pattern and the strength of the fabric.

[0035] 4. The planar hoop fabric and the flat fabric of the present invention are woven during the folding process. Therefore, after the warp and weft yarns are woven, the excess warp yarns can be quickly trimmed along the fan-shaped boundaries, thereby improving the weaving efficiency of the planar hoop fabric.

[0036] 5. Compared with the prior art, the present invention can realize the rapid weaving of several rectangular fabrics by dividing the flat fabric into several rectangular fabrics, thereby improving the speed and efficiency of flat fabric weaving.

[0037] 6. Compared with the prior art, the present invention can realize the rapid weaving of several fan-shaped fabrics by dividing the planar hoop fabric into several fan-shaped fabrics, thereby improving the speed and efficiency of weaving the planar hoop fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is prior art;

[0039] Figure 2 This is a schematic structural diagram of a planar hoop fabric embodiment 1 of the present invention;

[0040] Figure 3 This is a weft insertion method of the first embodiment of the planar hoop fabric of the present invention;

[0041] Figure 4 This is the weft insertion method of the second embodiment of the planar hoop fabric of the present invention;

[0042] Figure 5 1 is a schematic diagram of the folding of the second embodiment of the planar hoop fabric of the present invention;

[0043] Figure 6 This is a schematic structural diagram of a second embodiment of a planar hoop fabric according to the present invention;

[0044] Figure 7 1 is a schematic diagram of the folding of the planar hoop fabric according to the third embodiment of the present invention;

[0045] Figure 8 This is a schematic structural diagram of a third embodiment of a planar hoop fabric according to the present invention;

[0046] Figure 9 Schematic diagram of the structure of the flat fabric of the present invention. DETAILED DESCRIPTION

[0047] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0048] Existing technologies such as Figure 1 As shown, the planar hoop fabric has no clear partitions and cannot be woven in different areas, resulting in a single pattern of the planar hoop fabric, increasing the weaving space of the planar hoop fabric and reducing the weaving efficiency of the planar hoop fabric.

[0049] Example 1:

[0050] A method for producing a planar hoop fabric, characterized by comprising the following steps:

[0051] Step 1: pre-folding the planar hoop fabric to be woven into n fan-shaped fabrics to be woven, each fan-shaped fabric to be woven is a sheet fabric having m layers, and the angles of the n fan-shaped fabrics to be woven are a1, a2, ...an, respectively, a1 + a2 + ... + an = 360°, where n is an integer greater than or equal to 2;

[0052] Step 2: Pre-arrange the warp yarns;

[0053] Step 3: Insert the weft in sequence according to the designed weft insertion path, and the weft yarn is interwoven with the preset warp yarn to complete the weaving;

[0054] Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform the corresponding operation if necessary;

[0055] Step 5: Repeat steps 3 and 4 until the desired length is reached;

[0056] Step 6: The n fan-shaped fabrics are woven flatly to weave a flat hoop fabric having n fan-shaped fabrics.

[0057] like Figure 2 As shown, m=1, and the angles of n fan-shaped fabrics are the same or different, for example but not limited to a1=a2=an, or a1≠a2≠an.

[0058] Since m=1, the planar hoop fabric in Example 1 is a single layer.

[0059] The plane hoop fabric is subdivided into fan-shaped fabrics with four angles of 90° (a1=a2=a3=an), n=4, and the boundary of each fan of the plane hoop fabric is determined. A main warp yarn is first marked as A in the center of each fan-shaped fabric. The main warp yarn A divides the fan into two symmetrical fans S1 and fans S2 with the same area. The other warp yarns B1, B2...Bn are woven in sequence at an angle to the main warp yarn A along the length direction of the main warp yarn A. The other warp yarns B1, B2...Bn are no longer woven with the weft yarns when they encounter the boundary of the fan. At the same time, the warp yarns B1, B2...Bn woven into S1 and S2 are in opposite directions. This makes it easy to distinguish fan-shaped fabrics in different positions while increasing the diversity of the plane hoop fabric pattern. When problems occur in the weaving of the plane hoop fabric, it is also beneficial to identify them with the naked eye and facilitate correction.

[0060] It should be noted that after each fan-shaped fabric is woven and formed into the above-mentioned planar hoop fabric, the excess warp yarns need to be removed to form an aesthetically pleasing finished product.

[0061] What's more, the planar hoop fabric can also be subdivided into fan-shaped fabrics with each angle of 72° (a1=a2=a3=a4=an), n=5, and then the above weaving process is repeated. In other words, the planar hoop fabric can be divided into symmetrical fans or asymmetrical fans.

[0062] What's more, the planar hoop fabric can also be subdivided into sectors with different angles (a1=a2=30, a3=a4=150, or a1=a2=30, a3=90, a4=60), and then the above weaving process is repeated. In general, the planar hoop fabric can be divided into sector-shaped fabrics with the same angle or sector-shaped fabrics with different angles and woven.

[0063] like Figure 3 - Figure 4 As shown, the weft insertion method is specified. Figure 3 The weft yarn is continuous, and the weft yarn forms a closed loop weft insertion path from the lowest layer to the uppermost layer. It is woven with the warp yarn layer by layer from the inside to the outside, or from the outside to the inside, which speeds up the weaving efficiency of the plane hoop fabric. Figure 4 Each time the weft thread in the weft is woven into a circle, a new weft thread is introduced, and the weft thread is woven with the warp thread layer by layer from the inside to the outside, or from the outside to the inside. Figure 4 The discontinuous weft yarns are conducive to weaving weft yarns of different tissues and different materials into the planar hoop fabric, thereby increasing the diversity of the planar hoop fabric patterns and the strength of the planar hoop fabric.

[0064] In the first embodiment, a layer of planar hoop fabric is folded and partitioned to form n fan-shaped fabrics. The partitioned weaving of the n fan-shaped fabrics increases the diversity of the planar hoop fabric patterns. Secondly, since the planar hoop fabric is woven in partitions, it is also easy to identify problems in the weaving process of each area, which is convenient for timely correction, thereby improving the efficiency of weaving the planar hoop fabric.

[0065] In the second and third embodiments, m>1, therefore, the planar hoop fabrics in the second and third embodiments are multi-layered.

[0066] Example 2:

[0067] A method for producing a planar hoop fabric, characterized by comprising the following steps:

[0068] Step 1: pre-folding the planar hoop fabric to be woven into n fan-shaped fabrics to be woven, each fan-shaped fabric to be woven is a sheet fabric having m layers, and the angles of the n fan-shaped fabrics to be woven are a1, a2, ...an, respectively, a1 + a2 + ... + an = 360°, where n is an integer greater than or equal to 2;

[0069] Step 2: Pre-arrange the warp yarns;

[0070] Step 3: Insert the weft yarn in sequence according to the designed weft insertion path to ensure the continuity of the weft yarn and interweave it with the preset warp yarn to complete the weaving;

[0071] Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform the corresponding operation if necessary;

[0072] Step 5: Repeat steps 3 and 4 until the desired length is reached;

[0073] Step 6: The n fan-shaped fabrics are woven flatly to weave a flat hoop fabric having n fan-shaped fabrics.

[0074] In step 1, the folding method of the m-layer fabric is forward symmetrical folding or reverse symmetrical folding or a combination of the two.

[0075] In step 2, the warp yarns are arranged in groups and in parallel, that is, the warp yarns are divided into x groups, x≥2, and the x groups of warp yarns are arranged in a vertical and parallel manner. The number of warp yarn layers in each group is y, y≥1.

[0076] In step 3, the weft yarn is introduced by a reciprocating continuous weft insertion method. The weft yarn is introduced back and forth layer by layer in each group of warp yarns according to the order of warp yarn grouping. The weft insertion method is to first insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then insert the weft from the outer layer of the fabric to the inner layer of the fabric to ensure the continuity of the weft yarn.

[0077] like Figure 5 As shown, the planar hoop fabric is folded forward symmetrically or backward symmetrically twice, m=4, the angles of n fan-shaped fabrics are the same, a1=a2=……=an.

[0078] Further, Figure 6 For example, after folding twice, the size of each fan-shaped layer is the same. First, a main warp yarn is marked as A in the center of each fan-shaped fabric. The main warp yarn A divides the fan-shaped fabric into two symmetrical fans S1 and fans S2 with the same area. Other warp yarns B1, B2...Bn are woven in sequence along the length direction of the main warp yarn A at an angle to the main warp yarn A. The warp yarns B1, B2...Bn woven in the fan-shaped S1 are in opposite directions to the warp yarns B1, B2...Bn woven in the fan-shaped S2. Figure 5 The flat hoop fabric is woven during the folding process, so after the warp and weft threads are woven, the excess warp yarns can be quickly trimmed along the fan-shaped boundaries.

[0079] Figure 6 The warp yarns are arranged in groups and in parallel. The warp yarns are divided into 4 groups, C1, C2, C3, and C4. The 4 groups of warp yarns are arranged in parallel up and down. The number of layers of each group of warp yarns is y, and y ≥ 1. Figure 6 For the sake of ease of understanding, the number of warp yarn layers shown is 5. Figure 6 The shape of the fan-shaped fabric is determined by the warp yarn direction shown in the figure. The weft yarns woven with the warp yarns are introduced in a reciprocating continuous weft insertion method. The weft yarns are introduced back and forth layer by layer in each group of warp yarns according to the order of warp yarn grouping. The weft insertion method is to insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then insert the weft from the outer layer of the fabric to the inner layer of the fabric, or to insert the weft from the outer layer of the fabric to the inner layer of the fabric, and then insert the weft from the inner layer of the fabric to the outer layer of the fabric. Figure 6 As shown by the middle arrow, the weft yarn is ensured to be continuous; of course, the weft yarn can also be a discontinuous weft yarn, which is conducive to weaving weft yarns of different tissues and different materials into the plane hoop fabric, thereby increasing the diversity of the plane hoop fabric pattern.

[0080] Example 3:

[0081] Step 1: pre-folding the planar hoop fabric to be woven into n fan-shaped fabrics to be woven, each fan-shaped fabric to be woven is a sheet fabric having m layers, and the angles of the n fan-shaped fabrics to be woven are a1, a2, ...an, respectively, a1 + a2 + ... + an = 360°, where n is an integer greater than or equal to 2;

[0082] Step 2: Pre-arrange the warp yarns;

[0083] Step 3: Insert the weft yarn in sequence according to the designed weft insertion path to ensure the continuity of the weft yarn and interweave it with the preset warp yarn to complete the weaving;

[0084] Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform the corresponding operation if necessary;

[0085] Step 5: Repeat steps 3 and 4 until the desired length is reached;

[0086] Step 6: The n fan-shaped fabrics are woven flatly to weave a flat hoop fabric having n fan-shaped fabrics.

[0087] In step 1, the folding method of the m-layer fabric is forward symmetrical folding or reverse symmetrical folding or a combination of the two.

[0088] In step 2, the warp yarns are arranged in groups and in parallel, that is, the warp yarns are divided into x groups, x≥2, and the x groups of warp yarns are arranged in a vertical and parallel manner. The number of warp yarn layers in each group is y, y≥1.

[0089] Step 3: The weft yarn is introduced by a reciprocating continuous weft insertion method. The weft yarn is introduced back and forth layer by layer in each group of warp yarns according to the order of warp yarn grouping. The weft insertion method is to first insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then insert the weft from the outer layer of the fabric to the inner layer of the fabric to ensure the continuity of the weft yarn.

[0090] like Figure 7 As shown, the planar hoop fabric is folded forward symmetrically and reversely symmetrically into 4 times, m=8, and the angles of n fan-shaped fabrics are the same, a1=a2=……=an.

[0091] Further, Figure 8 For example, after folding four times, the size of each fan-shaped fabric is the same. First, a main warp yarn is marked as A at the center of each fan-shaped fabric. The main warp yarn A divides the fan-shaped fabric into two symmetrical fans S1 and fans S2 with the same area. The other warp yarns B1, B2...Bn are woven in sequence along the length direction of the main warp yarn A at an angle to the main warp yarn A. The warp yarns B1, B2...Bn woven in the fan-shaped fabric are in opposite directions to the warp yarns B1, B2...Bn woven in the fan-shaped fabric S1. Figure 8 The warp yarns are arranged in groups and parallel to each other. The warp yarns are divided into 8 groups, C1-C8. The 8 groups of warp yarns are arranged in parallel up and down. The number of layers of each group of warp yarns is y layers, y≥1. Figure 8Since the flat hoop fabric is folded many times, it is not easy to unfold into a plane after several fan-shaped weaving. Therefore, there is more than one spacing difference between adjacent warp yarns, which increases the gap between adjacent warp yarns and facilitates the unfolding of the flat hoop fabric. The weft yarn introduction of the warp yarn weaving adopts a reciprocating continuous weft insertion method. The weft yarn is introduced back and forth layer by layer in each group of warp yarns in the order of warp yarn grouping. The weft insertion method is to insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then from the outer layer of the fabric to the inner layer of the fabric, or from the outer layer of the fabric to the inner layer of the fabric, and then from the inner layer of the fabric to the outer layer of the fabric, to ensure the continuity of the weft yarn; of course, the weft yarn can also be a discontinuous weft yarn, which is conducive to weaving weft yarns of different tissues and different materials into the flat hoop fabric, increasing the diversity of the pattern of the flat hoop fabric.

[0092] The woven planar hoop fabrics in Embodiments 1 to 3 are symmetrical or asymmetrical.

[0093] The fan-shaped fabrics in Example 2 and Example 3 can be woven simultaneously according to the above weaving method. When each fan-shaped fabric is woven and forms the above-mentioned planar hoop fabric, the excess warp yarns are subtracted to complete the weaving of the planar hoop fabric, thereby improving the efficiency of weaving the planar hoop fabric.

[0094] In Examples 2 and 3, the planar hoop fabric is folded to form n fan-shaped fabrics, which reduces the area occupied by the planar hoop fabric when it is flatly woven and solves the problem of equipment capacity limitations; secondly, the warp yarns of the fan-shaped fabric in each partition can be arranged in advance, thereby improving the efficiency of weaving the planar hoop fabric.

[0095] A planar hoop fabric comprises a fan-shaped fabric woven from n partitions. Adjacent fan-shaped fabrics have dividing lines due to the partition weaving. The angles of the n fan-shaped fabrics are respectively a1, a2, ...an, where a1 + a2 + ...+ an = 360°. The fabric has high strength, controllable area, and a unique shape. It is used in turbine disks and flanges in the aerospace field, or in generator blades and other equipment in the energy field.

[0096] A method for producing a flat fabric,

[0097] Step 1: pre-folding a planar fabric to be woven into n rectangular fabrics to be woven, each rectangular fabric to be woven is a sheet fabric having m layers, and the n rectangular fabrics to be woven have the same or different lengths, where n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1;

[0098] Step 2: Pre-arrange the warp yarns;

[0099] Step 3: Insert the weft in sequence according to the designed weft insertion method, and interweave the weft yarn with the preset warp yarn to complete the weaving;

[0100] Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform the corresponding operation if necessary;

[0101] Step 5: Repeat steps 3 and 4 until the desired length is reached;

[0102] Step 6: Spread out the woven n rectangular fabrics in a plane to weave a planar fabric having n rectangular fabrics.

[0103] In step 2, the warp yarns are arranged in groups and in parallel, that is, the warp yarns are divided into x groups, x≥2, and the x groups of warp yarns are arranged in a vertical and parallel manner. The number of warp yarn layers in each group is y, y≥1.

[0104] In step 3, the weft yarn is introduced by a reciprocating continuous weft insertion method, and the weft yarn is reciprocatingly introduced layer by layer in each group of warp yarns according to the order of warp yarn grouping. The weft insertion method is to first insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then insert the weft from the outer layer of the fabric to the inner layer of the fabric, or to insert the weft from the outer layer of the fabric to the inner layer of the fabric, and then insert the weft from the inner layer of the fabric to the outer layer of the fabric, to ensure the continuity of the weft yarn.

[0105] The folding weaving method is applied to flat fabrics, such as folding 800cm wide fabric into 8 layers continuously to form a 100cm wide fabric.

[0106] like Figure 9 As shown, after the flat fabric is folded multiple times, n rectangular fabrics of the same size are formed.

[0107] A main warp yarn is first marked as A at the center of each rectangle. The main warp yarn A divides the rectangular fabric into two symmetrical and equal-area sections S1 and S2. Other warp yarns B1, B2...Bn are woven in sequence along the length direction of the main warp yarn A. Since the flat fabric is woven during the folding process, after the warp and weft yarns are woven, the excess warp yarns can be quickly trimmed along the boundaries.

[0108] The warp yarns are arranged in groups and in parallel. The warp yarns are divided into 8 groups, C1, C2, C3, C4, C5, C6, C7, and C8. The 8 groups of warp yarns are arranged in parallel up and down. The number of warp yarn layers in each group is y, y ≥ 1, and it is set to 5 groups here. The weft yarns woven with the warp yarns are introduced in a reciprocating continuous weft insertion method. The weft yarns are introduced back and forth layer by layer in each group of warp yarns in the order of the warp yarn grouping. The weft insertion method is to insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then from the outer layer of the fabric to the inner layer of the fabric, or from the outer layer of the fabric to the inner layer of the fabric, and then from the inner layer of the fabric to the outer layer of the fabric, to ensure the continuity of the weft yarns; of course, the weft yarns can also be discontinuous weft yarns, which is conducive to weaving weft yarns of different tissues and different materials into the plane hoop fabric, thereby increasing the diversity of the plane hoop fabric pattern.

[0109] A planar fabric is woven by adopting the production method, and comprises a rectangular fabric woven by n partitions.

[0110] The embodiments of the present invention can all adopt fixed-length weaving or continuous weaving. Fixed-length weaving means that the warp yarn is designed to be within a certain length range, connected to the tension line, and woven with fixed-length weaving equipment; continuous weaving means that the warp yarn is designed to be longer in length, continuously stored in a yarn storage device, and woven with continuous weaving equipment.

[0111] Gradient yarn placement can also be used for sheet fabrics. This refers to the process of changing the yarn arrangement, diameter, density, or other parameters during the weaving process to create a gradient structure in the thickness or plane direction. This gradient can be achieved by decreasing yarn diameter layer by layer, changing porosity, or adjusting yarn density.

[0112] The planar hoop fabric, sheet fabric, and fan-shaped fabric to be woven and formed in step 1 of the embodiment of the present invention are all conceptual shapes before weaving, and are not entities after weaving.

[0113] Compared with the prior art, some advantages of the present invention are:

[0114] Firstly, compared with the prior art, the present invention can achieve rapid weaving of several fan-shaped fabrics by dividing the planar hoop fabric into several fan-shaped fabrics, thereby improving the weaving efficiency of the planar hoop fabric.

[0115] Secondly, the present invention meets the molding requirements of two-dimensional planar hoop fabrics, can realize the diversification of fabric structures, and improve the designability of fabric structures to better meet the needs of different composite materials. The equipment can be used for fixed-length weaving as well as continuous weaving.

[0116] Thirdly, the present invention adopts a grouped parallel warp yarn arrangement method and a reciprocating weft insertion method, which can realize the contour weaving of large-size and large-diameter fabrics, solving the problem of equipment capacity limitation.

[0117] Fourthly, the weft insertion method of the present invention also includes introducing a new weft thread every time a circle is woven, and the weft threads are woven layer by layer with the warp threads from the inside out, which is conducive to weaving different patterns into the flat hoop fabric.

[0118] Fifth, the fabric of the present invention is woven during the folding process. Therefore, after the warp and weft threads are woven, the excess warp yarns can be quickly trimmed along the fan-shaped boundaries, thereby improving the efficiency of weaving the planar hoop fabric.

[0119] Sixth, compared with the prior art, the present invention can achieve rapid weaving of several rectangular fabrics by dividing the flat fabric into several rectangular fabrics, thereby improving the speed and efficiency of flat fabric weaving.

[0120] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is to be embodied in the widest possible manner consistent with the principles and novel features disclosed herein.

[0121] Although this article uses more figure marks in the figures, it does not exclude the possibility of using other terms; these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A method for producing a planar hoop fabric, characterized in that: The following steps are included: Step 1: Pre-folding the planar hoop fabric to be woven into n fan-shaped fabrics to be woven, each fan-shaped fabric to be woven is a sheet fabric having m layers, and the angles of the n fan-shaped fabrics to be woven are a1, a2, ...an, a1 + a2 + ... + an = 360°, where n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1; Step 2: Preset the warp arrangement. First, mark a main warp yarn as A. The main warp yarn A divides the fan-shaped fabric into two symmetrical sectors S1 and S2 with the same area. Other warp yarns B1, B2...Bn are woven in sequence along the length direction of the main warp yarn A at an angle to the main warp yarn A. Step 3: Insert the weft in sequence according to the designed weft insertion method, and interweave the weft yarn with the preset warp yarn to complete the weaving; Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform the corresponding operation if necessary; Step 5: Repeat steps 3 and 4 until the desired length is reached; Step 6: The n fan-shaped fabrics are woven flatly to weave a flat hoop fabric having n fan-shaped fabrics.

2. The method for producing a planar hoop fabric according to claim 1, characterized in that: The folding method of the m layers of fabric in step 1 is forward symmetrical folding or reverse symmetrical folding or a combination of the two.

3. The method for producing a planar hoop fabric according to claim 1, characterized in that: In step 2, the warp yarns are arranged in groups and in parallel, that is, the warp yarns are divided into x groups, x≥2, and the x groups of warp yarns are arranged in a vertical and parallel manner, and each group of warp yarns has y layers, y≥1.

4. The method for producing a planar hoop fabric according to claim 1, wherein: The warp yarns B1, B2, ..., Bn woven into the sector S1 and the warp yarns B1, B2, ..., Bn woven into the sector S2 are in opposite directions.

5. The method for producing a planar endless fabric according to claim 1, characterized in that: In step 3, the weft yarn is introduced by a reciprocating continuous weft insertion method, and the weft yarn is reciprocatingly introduced layer by layer into each group of warp yarns according to the order of the warp yarn grouping. The weft insertion method is to first insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then insert the weft from the outer layer of the fabric to the inner layer of the fabric to ensure the continuity of the weft yarn.

6. The method for producing a planar endless fabric according to claim 1, characterized in that: In step 3, each time the weft yarn is woven into one circle, a new weft thread is introduced, and the weft threads are woven with the warp threads in sequence from the inside out.

7. A planar hoop fabric, characterized in that: The material is woven using the production method according to any one of claims 1 to 6 and is used as a turbine disk or flange in the aerospace field, or as a generator blade in the energy field.

8. A planar hoop fabric according to claim 7, characterized in that: The invention comprises a fan-shaped fabric woven from n partitions, wherein adjacent fan-shaped fabrics have a dividing line due to the partition weaving, and the angles of the n fan-shaped fabrics are respectively a1, a2...an, and a1+a2+...+an=360°.

9. A method for producing a flat fabric, characterized in that: Step 1: pre-folding a planar fabric to be woven into n rectangular fabrics to be woven, each rectangular fabric to be woven is a sheet fabric having m layers, and the n rectangular fabrics to be woven have the same or different lengths, where n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1; Step 2: Preset the warp arrangement. First, mark a main warp yarn as A. The main warp yarn A divides the rectangular fabric into two symmetrical rectangles S1 and S2 with the same area. Other warp yarns B1, B2...Bn are woven in sequence along the length direction of the main warp yarn A. Step 3: Insert the weft in sequence according to the designed weft insertion method, and interweave the weft yarn with the preset warp yarn to complete the weaving; Step 4: Determine whether it is necessary to add or subtract yarn or add or subtract layers at the corresponding position according to the size requirements of the fabric profiling plane, and perform the corresponding operation if necessary; Step 5: Repeat steps 3 and 4 until the desired length is reached; Step 6: Spread out the woven n rectangular fabrics in a plane to weave a planar fabric having n rectangular fabrics.

10. The method for producing a flat fabric according to claim 9, characterized in that: In step 2, the warp yarns are arranged in groups and in parallel, that is, the warp yarns are divided into x groups, x≥2, and the x groups of warp yarns are arranged in a vertical and parallel manner, and each group of warp yarns has y layers, y≥1.

11. The method for producing a flat fabric according to claim 9, characterized in that: In step 3, the weft yarn is introduced by a reciprocating continuous weft insertion method, and the weft yarn is reciprocatingly introduced layer by layer into each group of warp yarns according to the order of the warp yarn grouping. The weft insertion method is to first insert the weft from the inner layer of the fabric to the outer layer of the fabric, and then insert the weft from the outer layer of the fabric to the inner layer of the fabric to ensure the continuity of the weft yarn.

12. A planar fabric, characterized in that: The rectangular fabric is woven by the production method according to any one of claims 9 to 11 and is woven from n partitions.

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