A weaving method for reducing the yarn hole of a thin 2.5d preform
By pre-emptying spindles and inserting paired warp yarns in a 2.5D braided array, the problem of through-holes in thin preforms is solved, achieving effective filling of holes and yarn stability, making it suitable for aerospace structures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
- Filing Date
- 2024-01-08
- Publication Date
- 2026-05-29
AI Technical Summary
During the 2.5D weaving process, the through holes in the thin preform cannot be effectively filled, leading to overheating damage to the internal components of the preform and limiting its application in aerospace structures.
By pre-arranging new empty spindle arrays in the weaving array and moving the main yarn onto the empty spindles, and inserting paired warp yarns to cover the main yarn, a barrier is formed to fill the through holes.
It effectively compensates for through holes, avoids the hidden dangers caused by the clustering of new yarns, and is suitable for weaving thin prefabricated bodies, especially for ablation and rotation engineering prototypes.
Smart Images
Figure CN117888278B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of 2.5D yarn addition and subtraction technology, and particularly to a weaving method for reducing yarn holes in thin 2.5D preforms. Background Technology
[0002] 2.5D woven shallow cross-bending composite materials have excellent mechanical properties and structural integrity and have been widely used in aerospace structures. In conventional 2.5D yarn addition and subtraction technology, through holes are left at the yarn addition points, and these holes are never filled in subsequent weaving processes. Especially for thin preforms, since the holes penetrate the entire thickness of the fabric, the internal components of the preform will overheat and be damaged during use, limiting its application.
[0003] Therefore, there is an urgent need to develop an engineering-practical method to compensate for the woven holes in thin precast structures, which is easy to implement and control. Summary of the Invention
[0004] In view of the problems existing in the existing weaving methods for reducing yarn holes in thin 2.5D preforms, the present invention is proposed.
[0005] Therefore, the purpose of this invention is to provide a weaving method for reducing yarn holes in thin 2.5D preforms, the purpose of which is to compensate for the holes through a new 2.5D yarn addition method.
[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including a weaving method, wherein during the weaving process, the initial arrangement of the parent yarn spindles is a 2.5D weaving array;
[0007] In the knitting array, new empty spindle arrays are pre-arranged according to a pattern; and,
[0008] The parent yarn on the braiding array is transferred to an empty spindle, forming an empty spindle in the braiding array;
[0009] After the yarn is transferred, a pair of warp yarns are inserted to overlap with the mother yarns of the weaving array;
[0010] To fill the through hole.
[0011] As a preferred embodiment of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention, wherein: during the weaving process, the initial arrangement of the parent yarn spindles is a 2.5D weaving array;
[0012] In the weaving array, empty bobbin arrays are pre-arranged according to a pattern, namely, the first empty bobbin column and the second empty bobbin column; and,
[0013] The yarn on the spindle of the mother column of the braiding array is shifted to the newly added daughter column, resulting in empty spindles in the mother column;
[0014] The empty spindles on the first and second empty spindle columns are combined with the empty spindles in the mother column of the weaving array to form a set of empty spindles;
[0015] Add a new warp thread to the empty spindle and fold it along the weft thread to fix it onto the empty spindle;
[0016] The process is repeated until the empty spindles in the newly added column are filled.
[0017] As a preferred embodiment of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention, the weaving method can be applied to an overall mother column with an even number of spindles, an overall mother column with an odd number of spindles, a separate mother column with an even number of spindles, and a separate mother column with an odd number of spindles.
[0018] As a preferred embodiment of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention, the weaving method specifically comprises the following steps: the overall mother row consists of an even number of spindles.
[0019] The weaving array consists of four consecutive rows of even-numbered spindles: the first, second, third, and fourth spindle rows.
[0020] At the initial position, the odd-numbered columns of the weaving array are two spindle spacings lower than the even-numbered columns, and the first empty spindle sub-column and the second empty spindle sub-column are added between the second and third spindle mother columns;
[0021] Through shallow bending motion, the distance between the upper two spindles in odd-numbered columns and the distance between the lower two spindles in even-numbered columns;
[0022] Since the first empty yarn spindle column and the second empty yarn spindle column are added together, the second yarn spindle mother column and the third yarn spindle mother column are partially transferred to the first empty yarn spindle column and the second empty yarn spindle column;
[0023] Pairs of warp yarns are inserted into the second and third spindle mother columns, the first empty spindle column, and the second empty spindle column to form overlapping;
[0024] To fill the through hole.
[0025] As a preferred embodiment of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention, wherein: the first yarn mother row, the second yarn mother row, the third yarn mother row and the fourth yarn mother row are even number of yarns, and the second yarn mother row and the fourth yarn mother row are two yarn spacings higher than the first yarn mother row and the third yarn mother row.
[0026] The second spindle mother column includes the second column first spindle point, the second column second spindle point, the second column third spindle point, the second column fourth spindle point, the second column fifth spindle point, and the second column sixth spindle point arranged in sequence;
[0027] The third spindle mother column includes the third column first spindle point, the third column second spindle point, the third column third spindle point, the third column fourth spindle point, the third column fifth spindle point, and the third column sixth spindle point;
[0028] The first empty yarn spindle column and the second empty yarn spindle column are added together, and the first yarn spindle point of the second column, the third yarn spindle point of the second column, and the first yarn spindle point of the third column are moved parallel to the first empty yarn spindle column;
[0029] Move the yarn parallel to the second empty yarn spindle column by the sixth spindle point of the second column, the fourth spindle point of the third column, and the sixth spindle point of the third column;
[0030] Pairs of warp yarns are inserted into the first spindle point of the second column, the third spindle point of the second column, and the first spindle point of the third column at the initial position and the next grid spacing of the yarn transfer position. Pairs of warp yarns are then inserted into the sixth spindle point of the second column, the fourth spindle point of the third column, and the sixth spindle point of the third column at the initial position and the next grid spacing of the yarn transfer position.
[0031] It achieves overlapping with the mother yarn of the braided array, compensating for through holes.
[0032] As a preferred embodiment of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention, the weaving method specifically comprises the following steps: the overall mother column has an odd number of spindles.
[0033] The weaving array consists of four rows of yarn mother columns arranged in sequence, each with an odd number of spindles.
[0034] At the initial position, the odd-numbered columns of the weaving array are two spindle spacings lower than the even-numbered columns, and the first empty spindle sub-column and the second empty spindle sub-column are added between the second and third spindle mother columns;
[0035] Through shallow bending motion, the distance between the upper two spindles in odd-numbered columns and the distance between the lower two spindles in even-numbered columns;
[0036] Since the first empty yarn spindle column and the second empty yarn spindle column are added together, the second yarn spindle mother column and the third yarn spindle mother column are partially transferred to the first empty yarn spindle column and the second empty yarn spindle column;
[0037] Pairs of warp yarns are inserted into the second and third spindle mother columns, the first empty spindle column, and the second empty spindle column to form overlapping;
[0038] To fill the through hole.
[0039] As a preferred embodiment of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention, the second yarn spindle mother column includes a second column of first yarn spindle points, a second column of second yarn spindle points, a second column of third yarn spindle points, a second column of fourth yarn spindle points, and a second column of fifth yarn spindle points arranged in sequence. The second yarn spindle mother column and the fourth yarn spindle mother column are two yarn spindle spacings higher than the first yarn spindle mother column and the third yarn spindle mother column.
[0040] The third spindle mother column includes the first spindle point of the third column, the second spindle point of the third column, the third spindle point of the third column, the fourth spindle point of the third column, and the fifth spindle point of the third column;
[0041] The first empty yarn spindle column and the second empty yarn spindle column are added together, and the third yarn spindle point of the second column and the first yarn spindle point of the third column are moved parallel to the first empty yarn spindle column;
[0042] Move the yarn parallel to the fifth spindle point in the second column and the fourth spindle point in the third column to the second empty spindle column;
[0043] Pairs of warp yarns are inserted into the first and fourth spindle points of the third column at the initial position and the next grid spacing of the yarn shifting position. Pairs of warp yarns are then inserted into the third and fifth spindle points of the second column at the initial position and the previous grid spacing of the yarn shifting position. Finally, pairs of warp yarns are inserted in parallel into the first and second empty spindle columns at the grid position above the fourth spindle point of the third column.
[0044] It achieves overlapping with the mother yarn of the braided array, compensating for through holes.
[0045] As a preferred embodiment of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention, the weaving method specifically comprises the following steps for weaving a split mother column with an even number of spindles:
[0046] The weaving array consists of four consecutive rows of even-numbered spindles: the first, second, third, and fourth spindle rows.
[0047] At the initial position, the odd-numbered columns of the weaving array are two spindle spacings lower than the even-numbered columns. The first empty spindle sub-column is added between the second and third spindle mother columns, and the second empty spindle sub-column is added between the third and fourth spindle mother columns.
[0048] Through shallow bending motion, the distance between the two upper spindles in the odd column and the distance between the two lower spindles in the even column are adjusted so that the even column is two spindles higher than the odd column.
[0049] Because the first empty yarn spindle column and the second empty yarn spindle column are added to the split structure, the yarn of the first yarn spindle mother column and the second yarn spindle mother column are transferred to the first empty yarn spindle column, and the yarn of the third yarn spindle mother column and the fourth yarn spindle mother column are transferred to the second empty yarn spindle column.
[0050] Pairs of warp yarns are inserted into the first, second, third, and fourth spindle mother columns, as well as the first and second empty spindle columns, to form overlapping.
[0051] To fill the through hole.
[0052] As a preferred embodiment of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention, wherein: the first yarn mother row, the second yarn mother row, the third yarn mother row and the fourth yarn mother row are even number of yarns, and the second yarn mother row and the fourth yarn mother row are two yarn spacings higher than the first yarn mother row and the third yarn mother row.
[0053] The first spindle mother column includes a first column of first spindle points, a first column of second spindle points, a first column of third spindle points, a first column of fourth spindle points, a first column of fifth spindle points, and a first column of sixth spindle points arranged in sequence;
[0054] The second spindle mother column includes the second column first spindle point, the second column second spindle point, the second column third spindle point, the second column fourth spindle point, the second column fifth spindle point, and the second column sixth spindle point arranged in sequence;
[0055] The third spindle mother column includes the third column first spindle point, the third column second spindle point, the third column third spindle point, the third column fourth spindle point, the third column fifth spindle point, and the third column sixth spindle point;
[0056] The fourth spindle mother column includes the fourth column first spindle point, the fourth column second spindle point, the fourth column third spindle point, the fourth column fourth spindle point, the fourth column fifth spindle point, and the fourth column sixth spindle point arranged in sequence;
[0057] The first empty yarn spindle column and the second empty yarn spindle column are added separately, and the first yarn spindle point of the first column, the first yarn spindle point of the second column, and the third yarn spindle point of the second column are moved parallel to the first empty yarn spindle column.
[0058] The first yarn spindle point in the third column, the second yarn spindle point in the third column, the second yarn spindle point in the fourth column, and the fourth yarn spindle point in the fourth column are moved parallel to the second empty yarn spindle column;
[0059] Pairs of warp yarns are inserted into the first column first spindle point, the second column first spindle point and the second column third spindle point at the initial position and the next grid spacing of the yarn transfer position, and then pairs of warp yarns are inserted into the fourth column second spindle point and the fourth column fourth spindle point at the initial position and the next grid spacing of the yarn transfer position.
[0060] Finally, at the fifth spindle in the third column, insert vertically paired warp yarns at a spacing of one grid below and two grids below.
[0061] It achieves overlapping with the mother yarn of the braided array, compensating for through holes.
[0062] As a preferred embodiment of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention, the weaving method specifically comprises the following steps for weaving a split mother column with an even number of spindles:
[0063] The weaving array consists of four rows of yarn mother columns arranged in sequence, each with an odd number of spindles.
[0064] At the initial position, the odd-numbered columns of the weaving array are two spindle spacings lower than the even-numbered columns. The first empty spindle sub-column is added between the second and third spindle mother columns, and the second empty spindle sub-column is added between the third and fourth spindle mother columns.
[0065] Through shallow bending motion, the distance between the two upper spindles in the odd column and the distance between the two lower spindles in the even column are adjusted so that the even column is two spindles higher than the odd column.
[0066] Because the first empty yarn spindle column and the second empty yarn spindle column are added to the split structure, the yarn of the first yarn spindle mother column and the second yarn spindle mother column are transferred to the first empty yarn spindle column, and the yarn of the third yarn spindle mother column and the fourth yarn spindle mother column are transferred to the second empty yarn spindle column.
[0067] Pairs of warp yarns are inserted into the first, second, third, and fourth spindle mother columns, as well as the first and second empty spindle columns, to form overlap and fill the through holes.
[0068] The more specific steps are as follows:
[0069] The first, second, third, and fourth spindle mother columns are odd-numbered spindles, and the second and fourth spindle mother columns are two spindle spacings higher than the first and third spindle mother columns.
[0070] The first spindle mother column includes a first column of first spindle points, a first column of second spindle points, a first column of third spindle points, a first column of fourth spindle points, and a first column of fifth spindle points arranged in sequence;
[0071] The second spindle mother column includes a second column of first spindle points, a second column of second spindle points, a second column of third spindle points, a second column of fourth spindle points, and a second column of fifth spindle points arranged in sequence;
[0072] The third spindle mother column includes the first spindle point of the third column, the second spindle point of the third column, the third spindle point of the third column, the fourth spindle point of the third column, and the fifth spindle point of the third column;
[0073] The fourth spindle mother column includes the fourth column first spindle point, the fourth column second spindle point, the fourth column third spindle point, the fourth column fourth spindle point, and the fourth column fifth spindle point arranged in sequence;
[0074] The first empty yarn spindle column and the second empty yarn spindle column are added separately, and the first yarn spindle point of the first column, the first yarn spindle point of the second column, and the third yarn spindle point of the second column are moved parallel to the first empty yarn spindle column.
[0075] The first yarn spindle point, the second yarn spindle point, the second yarn spindle point, the third yarn spindle point, and the third yarn spindle point in the third column are moved parallel to the second empty yarn spindle column;
[0076] Pairs of warp yarns are inserted into the first column first spindle point and the first column first spindle point in the next grid spacing below the yarn shifting position, and then pairs of warp yarns are inserted into the fourth column second spindle point in the previous grid spacing above the yarn shifting position.
[0077] A pair of warp yarns is inserted at a spacing of one grid below the fifth spindle point of the third column and at the initial position of the third spindle point of the second column; and a pair of warp yarns is inserted at a spacing of two grids below the fifth spindle point of the third column and at the initial position of the fourth spindle point of the fourth column.
[0078] It achieves overlapping with the mother yarn of the braided array, compensating for through holes.
[0079] As a preferred embodiment of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention, the weaving method is applicable to structures including shallow cross-linked straight-linked structures and their variations, shallow cross-linked bent-linked or shallow cross-linked straight-linked warp-inserted and normal-direction woven structures.
[0080] The beneficial effects of this invention are as follows: This method involves implanting paired warp yarns after displacement, utilizing the "blocking" effect of the mother yarn to compensate for through holes, avoiding the hidden danger of through holes caused by the clustering of newly added yarns, and solving the problem of through holes caused by conventional 2.5D yarn addition in weaving. The compensation effect on holes is particularly significant for weaving thin preforms, and it is easy to implement and control, making it suitable for use in ablation-type thin rotating engineering prototypes. Attached Figure Description
[0081] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:
[0082] Figure 1 This is a schematic diagram of step 1 of embodiment 2 of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention.
[0083] Figure 2 This is a schematic diagram of step 2 in Example 2 of the weaving method for reducing yarn holes in a thin 2.5D preform according to the present invention.
[0084] Figure 3 This is a schematic diagram of step 3 of embodiment 2 of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention.
[0085] Figure 4 This is a schematic diagram of step 4 of embodiment 2 of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention.
[0086] Figure 5 This is a schematic diagram of step 1 of embodiment 3 of the present invention for the method of reducing yarn holes in thin 2.5D preforms.
[0087] Figure 6 This is a schematic diagram of step 2 of embodiment 3 of the present invention for the method of reducing yarn holes in thin 2.5D preforms.
[0088] Figure 7 This is a schematic diagram of step 3 of an embodiment of the weaving method for reducing yarn holes in a thin 2.5D preform according to the present invention.
[0089] Figure 8 This is a schematic diagram of step 4 of embodiment 3 of the present invention regarding the method for reducing yarn holes in thin 2.5D preforms.
[0090] Figure 9 This is a schematic diagram of step 1 of embodiment 4 of the present invention regarding the method for reducing yarn holes in thin 2.5D preforms.
[0091] Figure 10 This is a schematic diagram of step 2 of embodiment 4 of the present invention regarding the method for reducing yarn holes in thin 2.5D preforms.
[0092] Figure 11 This is a schematic diagram of step 3 of embodiment 4 of the present invention regarding the method for reducing the number of yarn holes in a thin 2.5D preform.
[0093] Figure 12This is a schematic diagram of step 4 of an embodiment of the weaving method for reducing yarn holes in a thin 2.5D preform according to the present invention.
[0094] Figure 13 This is a schematic diagram of step 1 of embodiment 5 of the present invention for the method of reducing yarn holes in thin 2.5D preforms.
[0095] Figure 14 This is a schematic diagram of step 2 of embodiment 5 of the present invention regarding the method for reducing yarn holes in thin 2.5D preforms.
[0096] Figure 15 This is a schematic diagram of step 3 of embodiment 5 of the present invention regarding the method for reducing yarn holes in thin 2.5D preforms.
[0097] Figure 16 This is a schematic diagram of step 4 of embodiment 5 of the present invention regarding the method for reducing yarn holes in thin 2.5D preforms.
[0098] Figure 17 This is a schematic diagram of the conical preform structure of the weaving method for reducing yarn holes in thin 2.5D preforms according to the present invention.
[0099] Figure 18 This is a schematic diagram of the structure of the tapered preform with added yarn holes, which is part of the weaving method for reducing the yarn holes in a thin 2.5D preform according to the present invention.
[0100] Figure 19 This is a schematic diagram of the lamp illumination method for detecting preform hole defects in the weaving method of reducing yarn holes in thin 2.5D preforms according to the present invention.
[0101] Explanation of symbols in the attached diagram: "×—×" indicates newly added yarn; "●→○" indicates the direction of warp movement on the spindle (reducing yarn is the opposite operation, and the two are reversible); "●" indicates that the spindle has introduced warp yarn; "○" indicates that the spindle has no warp yarn; "┇┇" indicates the position of the yarn row to be added. Detailed Implementation
[0102] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0103] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.
[0104] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.
[0105] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.
[0106] Example 1
[0107] Reference Figures 1-16 The first embodiment of the present invention provides a weaving method for reducing yarn holes in thin 2.5D preforms. This method includes inserting paired warp yarns after yarn transfer, utilizing the original blocking effect of the mother yarn to compensate for through holes.
[0108] During the weaving process, the initial arrangement of the mother yarn spindles is a 2.5D weaving array;
[0109] The weaving array 100 includes a first spindle mother column 101, a second spindle mother column 102, a third spindle mother column 103 and a fourth spindle mother column 104, which are arranged from left to right in the illustration.
[0110] In the first spindle mother column 101, the second spindle mother column 102, the third spindle mother column 103 and the fourth spindle mother column 104 of the weaving array 100, new empty spindle arrays 200 are pre-arranged according to a pattern;
[0111] The parent yarns of the first spindle mother column 101, the second spindle mother column 102, the third spindle mother column 103 and the fourth spindle mother column 104 on the weaving array 100 are transferred to the empty spindle 200, so that any one of the spindle columns in the weaving array 100 has an empty spindle.
[0112] After the yarn is transferred, pairs of warp yarns are inserted into the empty spindle, which overlap with the mother yarn of the braiding array 100, thus creating a "blocking" trend and effect.
[0113] To fill the through hole.
[0114] During use, the weaving method can be applied to four types of spindles: those with an even number of spindles in the overall parent column, those with an odd number of spindles in the overall parent column, those with an even number of spindles in the separate parent column, and those with an odd number of spindles in the separate parent column. The common steps for these four types of spindles are as follows:
[0115] The initial arrangement of the spindles is a 2.5D weaving array;
[0116] In the weaving array 100, new empty yarn spindle arrays 200 are pre-arranged according to a pattern. The empty yarn spindle arrays 200 are the first empty yarn spindle sub-column 201 and the second empty yarn spindle sub-column 202, respectively.
[0117] The yarns of the first spindle mother column 101, the second spindle mother column 102, the third spindle mother column 103 and the fourth spindle mother column 104 on the weaving array 100 are shifted to the first empty spindle sub-column 201 and the second empty spindle sub-column 202 of the newly added column, forming a mother column with empty spindles.
[0118] The empty yarn spindles on the first empty yarn spindle column 201 and the second empty yarn spindle column 202 are combined with the empty yarn spindles of the first yarn spindle mother column 101, the second yarn spindle mother column 102, the third yarn spindle mother column 103 and the fourth yarn spindle mother column 104 on the weaving array 100 to form a set of empty yarn spindles;
[0119] Add a new warp thread to the empty spindle and fold it along the weft thread to fix it onto the empty spindle;
[0120] The process is repeated until the empty spindles in the newly added column are filled.
[0121] The yarn reduction technique is carried out in the reverse order of the yarn increase technique, and the yarn reduction and increase techniques are reversible processes.
[0122] Example 2
[0123] Reference Figures 1-4 This is the second embodiment of the present invention, which differs from the first embodiment in that the yarn-increasing operation step is an even number of spindles in the overall parent column.
[0124] Compared to Embodiment 1, the braiding array 100 further includes an even number of spindles arranged in sequence: a first spindle mother row 101, a second spindle mother row 102, a third spindle mother row 103, and a fourth spindle mother row 104.
[0125] The first spindle mother column 101 includes the first column first spindle point 101a, the first column second spindle point 101b, the first column third spindle point 101c, the first column fourth spindle point 101d, the first column fifth spindle point 101e, and the first column sixth spindle point 101f arranged in sequence.
[0126] The second spindle mother column 102 includes the second column first spindle point 102a, the second column second spindle point 102b, the second column third spindle point 102c, the second column fourth spindle point 102d, the second column fifth spindle point 102e, and the second column sixth spindle point 102f arranged in sequence.
[0127] The third spindle mother column 103 includes the first spindle point 103a, the second spindle point 103b, the third spindle point 103c, the fourth spindle point 103d, the fifth spindle point 103e, and the sixth spindle point 103f in the third column;
[0128] The fourth spindle mother column 104 includes the fourth column first spindle point 104a, the fourth column second spindle point 104b, the fourth column third spindle point 104c, the fourth column fourth spindle point 104d, the fourth column fifth spindle point 104e, and the fourth column sixth spindle point 104f arranged in sequence.
[0129] Step 1:
[0130] Reference Figure 1 At the initial position of the operation, the second spindle mother column 102 and the fourth spindle mother column 104 are two spindle spacings higher than the first spindle mother column 101 and the third spindle mother column 103, and the first spindle mother column 101 and the third spindle mother column 103 are on the same parallel line.
[0131] A first empty yarn spindle column 201 and a second empty yarn spindle column 202 are added between the second yarn spindle mother column 102 and the third yarn spindle mother column 103. The first empty yarn spindle column 201 and the second empty yarn spindle column 202 are parallel to each other.
[0132] Step 2:
[0133] Reference Figure 2 At this point, the operation begins. Through shallow bending and connecting motion, the distance between the upper two spindles of the first spindle mother column 101 and the third spindle mother column 103, and the distance between the lower two spindles of the second spindle mother column 102 and the fourth spindle mother column 104 are adjusted.
[0134] Step 3:
[0135] Reference Figure 3 Move the yarn parallel to the first empty yarn spindle column 201 by the first yarn spindle point 102a, the third yarn spindle point 102c, and the first yarn spindle point 103a in the second column.
[0136] Move the yarn parallel to the second empty yarn spindle column 202, with the sixth yarn spindle point 102f in the second column, the fourth yarn spindle point 103d in the third column, and the sixth yarn spindle point 103f in the third column.
[0137] Pairs of warp yarns are inserted at the initial position 102a of the first spindle in the second column and at the next grid spacing after the final yarn transfer to the position 201 of the first empty spindle column;
[0138] Insert the paired warp yarns into the next grid space of the third spindle point 102c in the second column and the final yarn transfer position of the third spindle point 102c in the first empty spindle column 201;
[0139] Insert the paired warp yarns into the next grid space of the first yarn spindle point 103a in the third column and the final yarn transfer position of the first empty yarn spindle 201;
[0140] Insert the paired warp yarns into the space one grid above the position of the sixth spindle point 102f in the second column and the final yarn transfer position of the second empty spindle column 202;
[0141] Insert the paired warp yarns into the first cell of the second empty yarn column, one cell above the initial position of the fourth spindle point 103d in the third column and the final yarn transfer position of the fourth spindle point 103d.
[0142] Insert the paired warp yarns into the space one grid above the initial position 103f of the sixth spindle in the third column and the final position of the second empty spindle column 202.
[0143] Step 4:
[0144] Reference Figure 4 Finally, when the first spindle mother column 101, the second spindle mother column 102, the third spindle mother column 103 and the fourth spindle mother column 104 are all even numbers of spindles, and the whole is not separated by two columns, the yarn forms an overlap to make up for the through holes.
[0145] The remaining structure is the same as that in Example 1.
[0146] Example 3
[0147] Reference Figures 5-8 This is the third embodiment of the present invention, which differs from the second embodiment in that it involves a yarn-increasing operation step where the overall number of spindles is odd.
[0148] Compared to Embodiment 2, the braiding array 100 further includes a first spindle mother row 101, a second spindle mother row 102, a third spindle mother row 103 and a fourth spindle mother row 104 arranged in sequence, all of which are odd number of spindles.
[0149] The first spindle mother column 101 includes a first column first spindle point 101a, a first column second spindle point 101b, a first column third spindle point 101c, a first column fourth spindle point 101d, and a first column fifth spindle point 101e arranged in sequence.
[0150] The second spindle mother column 102 includes the second column first spindle point 102a, the second column second spindle point 102b, the second column third spindle point 102c, the second column fourth spindle point 102d, and the second column fifth spindle point 102e arranged in sequence;
[0151] The third spindle mother column 103 includes the third column first spindle point 103a, the third column second spindle point 103b, the third column third spindle point 103c, the third column fourth spindle point 103d, and the third column fifth spindle point 103e arranged in sequence.
[0152] The fourth spindle mother column 104 includes the fourth column first spindle point 104a, the fourth column second spindle point 104b, the fourth column third spindle point 104c, the fourth column fourth spindle point 104d, and the fourth column fifth spindle point 104e arranged in sequence.
[0153] Step 1:
[0154] Reference Figure 5 At the initial position of the operation, the second spindle mother column 102 and the fourth spindle mother column 104 are two spindle spacings higher than the first spindle mother column 101 and the third spindle mother column 103, and the first spindle mother column 101 and the third spindle mother column 103 are on the same parallel line.
[0155] A first empty yarn spindle column 201 and a second empty yarn spindle column 202 are added between the second yarn spindle mother column 102 and the third yarn spindle mother column 103. The first empty yarn spindle column 201 and the second empty yarn spindle column 202 are parallel to each other.
[0156] Step 2:
[0157] Reference Figure 6 At this point, the operation begins. Through shallow bending and connecting motion, the distance between the upper two spindles of the first spindle mother column 101 and the third spindle mother column 103, and the distance between the lower two spindles of the second spindle mother column 102 and the fourth spindle mother column 104 are adjusted.
[0158] Step 3:
[0159] Reference Figure 7 Move the yarn parallel to the third spindle point 102c of the second column and the first spindle point 103a of the third column to the first empty spindle column 201;
[0160] Move the yarn parallel to the fifth spindle point 102e in the second column and the fourth spindle point 103d in the third column to the second empty spindle column 202;
[0161] Insert the paired warp yarns into the next grid spacing at the initial position 103a of the first spindle in the third column and the final position of the first empty spindle in the first empty spindle column 201;
[0162] Insert the paired warp yarns into the next grid spacing at the initial position 103d of the fourth spindle in the third column and the final position 201 of the first empty spindle column;
[0163] Insert the paired warp yarns into the next grid spacing at the initial position 102c of the third spindle in the second column and the final position 202 of the second empty spindle column;
[0164] Insert the paired warp yarns into the next grid spacing at the initial position 102e of the fifth spindle in the second column and the final position 202 of the second empty spindle column;
[0165] Insert the paired warp yarns into the first empty yarn spindle column 201 and the second empty yarn spindle column 202, which are positioned parallel to each other and one grid above the fourth yarn spindle point 103d in the third column.
[0166] Step 4:
[0167] Reference Figure 8 Finally, when the first spindle mother column 101, the second spindle mother column 102, the third spindle mother column 103 and the fourth spindle mother column 104 are odd-numbered spindles and the whole is not separated by two columns, the yarn forms an overlap to make up for the through holes.
[0168] The remaining structure is the same as that in Example 2.
[0169] Example 4
[0170] Reference Figures 9-12 This is the fourth embodiment of the present invention, which differs from the third embodiment in that the yarn-increasing operation step is performed by having an even number of spindles in the split mother column.
[0171] Compared to embodiment 3, the braiding array 100 further includes an even number of spindles arranged in sequence: a first spindle mother row 101, a second spindle mother row 102, a third spindle mother row 103, and a fourth spindle mother row 104.
[0172] The first spindle mother column 101 includes the first column first spindle point 101a, the first column second spindle point 101b, the first column third spindle point 101c, the first column fourth spindle point 101d, the first column fifth spindle point 101e, and the first column sixth spindle point 101f arranged in sequence.
[0173] The second spindle mother column 102 includes the second column first spindle point 102a, the second column second spindle point 102b, the second column third spindle point 102c, the second column fourth spindle point 102d, the second column fifth spindle point 102e, and the second column sixth spindle point 102f arranged in sequence.
[0174] The third spindle mother column 103 includes the first spindle point 103a, the second spindle point 103b, the third spindle point 103c, the fourth spindle point 103d, the fifth spindle point 103e, and the sixth spindle point 103f in the third column;
[0175] The fourth spindle mother column 104 includes the fourth column first spindle point 104a, the fourth column second spindle point 104b, the fourth column third spindle point 104c, the fourth column fourth spindle point 104d, the fourth column fifth spindle point 104e, and the fourth column sixth spindle point 104f arranged in sequence.
[0176] Step 1:
[0177] Reference Figure 9 At the initial position of the operation, the second spindle mother column 102 and the fourth spindle mother column 104 are two spindle spacings higher than the first spindle mother column 101 and the third spindle mother column 103, and the first spindle mother column 101 and the third spindle mother column 103 are on the same parallel line.
[0178] A first empty spindle sub-row 201 is added between the second spindle mother row 102 and the third spindle mother row 103;
[0179] A second empty spindle sub-row 202 is added between the third spindle mother row 103 and the fourth spindle mother row 104.
[0180] Step 2:
[0181] Reference Figure 10 Through shallow bending motion, the first spindle mother column 101 and the third spindle mother column 103 are shifted two spindle spacings up, and the second spindle mother column 102 and the fourth spindle mother column 104 are shifted two spindle spacings down, so that the even-numbered columns are two spindle spacings higher than the odd-numbered columns.
[0182] Step 3:
[0183] Reference Figure 11 Move the yarn parallel to the first spindle point 101a in the first column, the first spindle point 102a in the second column, and the third spindle point 102c in the second column to the first empty spindle column 201, for a total of three points;
[0184] Move the yarn parallel to the first spindle point 103a, the second spindle point 103b, the second spindle point 104b, and the fourth spindle point 104d in the third column to the second empty spindle column 202, for a total of four points;
[0185] Insert the paired warp yarns into the next grid space of the first empty yarn spindle point 101a in the first column and the final yarn transfer position of the first empty yarn spindle 201;
[0186] Insert the paired warp yarns into the next grid space of the first yarn spindle point 102a in the second column and the final yarn transfer position of the first empty yarn spindle 201;
[0187] The initial position of the third spindle point 102c in the second column and the final position of the yarn are moved to the next grid spacing of the first empty yarn spindle column 201 to insert a pair of warp yarns. At this time, there are a total of three warp yarns on the first empty yarn spindle column 201.
[0188] Insert the paired warp yarns into the space one grid above the initial position of the second spindle point 104b in the fourth column and the final position of the second empty spindle column 202;
[0189] Insert the pair of warp yarns into the first position 104d of the fourth spindle in the fourth column and the final position of the second empty spindle column 202. At this time, there are two warp yarns in the second empty spindle column 202.
[0190] Finally, at the fifth spindle point 103e in the third column, insert vertically paired warp yarns at the next grid spacing and the two grid spacings below.
[0191] Step 4:
[0192] Reference Figure 12 Finally, when the first spindle mother column 101, the second spindle mother column 102, the third spindle mother column 103 and the fourth spindle mother column 104 are an even number of spindles, and two columns are added at the interval between the two spindles, the yarns form an overlap to make up for the through holes.
[0193] The remaining structure is the same as that in Example 3.
[0194] Example 5
[0195] Reference Figures 13-16 This is the fifth embodiment of the present invention, which differs from the fourth embodiment in that the yarn-increasing operation step is performed with an odd number of spindles in the split mother column.
[0196] Compared to embodiment 4, the braiding array 100 further includes a first spindle mother row 101, a second spindle mother row 102, a third spindle mother row 103 and a fourth spindle mother row 104 arranged in sequence, all of which are odd number of spindles.
[0197] The first spindle mother column 101 includes a first column first spindle point 101a, a first column second spindle point 101b, a first column third spindle point 101c, a first column fourth spindle point 101d, and a first column fifth spindle point 101e arranged in sequence.
[0198] The second spindle mother column 102 includes the second column first spindle point 102a, the second column second spindle point 102b, the second column third spindle point 102c, the second column fourth spindle point 102d, and the second column fifth spindle point 102e arranged in sequence;
[0199] The third spindle mother column 103 includes the first spindle point 103a, the second spindle point 103b, the third spindle point 103c, the fourth spindle point 103d, and the fifth spindle point 103e in the third column;
[0200] The fourth spindle mother column 104 includes the fourth column first spindle point 104a, the fourth column second spindle point 104b, the fourth column third spindle point 104c, the fourth column fourth spindle point 104d, and the fourth column fifth spindle point 104e arranged in sequence.
[0201] Step 1:
[0202] Reference Figure 13 At the initial position of the operation, the second spindle mother column 102 and the fourth spindle mother column 104 are two spindle spacings higher than the first spindle mother column 101 and the third spindle mother column 103, and the first spindle mother column 101 and the third spindle mother column 103 are on the same parallel line.
[0203] A first empty spindle sub-row 201 is added between the second spindle mother row 102 and the third spindle mother row 103;
[0204] A second empty spindle sub-row 202 is added between the third spindle mother row 103 and the fourth spindle mother row 104.
[0205] Step 2:
[0206] Reference Figure 14 Through shallow bending motion, the first spindle mother column 101 and the third spindle mother column 103 are shifted two spindle spacings up, and the second spindle mother column 102 and the fourth spindle mother column 104 are shifted two spindle spacings down, so that the even-numbered columns are two spindle spacings higher than the odd-numbered columns.
[0207] Step 3:
[0208] Reference Figure 15 Move the yarn parallel to the first empty yarn spindle column 201 by the first spindle point 101a, the first spindle point 102a, the second spindle point 102c, and the third spindle point 102c in the first column.
[0209] Move the yarn parallel to the second empty yarn spindle column 202 from the first yarn spindle point 103a, the second yarn spindle point 103b, the second yarn spindle point 104b, and the third yarn spindle point 104c in the third column.
[0210] Insert the paired warp yarns into the next grid space of the first empty yarn spindle point 101a in the first column and the final yarn transfer position of the first empty yarn spindle 201;
[0211] Insert the paired warp yarns into the next grid space of the first yarn spindle point 102a in the second column and the final yarn transfer position of the first empty yarn spindle 201;
[0212] Insert the paired warp yarns into the next grid space of the second spindle point 104b in the second empty spindle column 202, at the initial position and final yarn transfer point 104b in the fourth column;
[0213] Insert the paired warp yarns at the next grid spacing of the fifth spindle point 103e in the third column and at the initial position of the third spindle point 102c in the second column before yarn transfer;
[0214] Insert the paired warp yarns at the two-cell gap below the fifth spindle point 103e in the third column and at the initial position before yarn transfer at the fourth spindle point 104d in the fourth column.
[0215] Step 4:
[0216] Reference Figure 16 Finally, when the first spindle mother column 101, the second spindle mother column 102, the third spindle mother column 103 and the fourth spindle mother column 104 are odd numbers of spindles, and two columns are added at the interval between the separate parts, the yarns form an overlap to make up for the through holes.
[0217] The remaining structure is the same as that in Example 4.
[0218] Example 6
[0219] Reference Figures 1-19 The overall operation method, combined with Examples 1 to 5, can also be applied to shallow cross-linked direct connection and its variant structures, shallow cross-linked bent connection or shallow cross-linked direct connection lining warp, added normal direction and other braided structures.
[0220] Reference Figure 17 The weaving direction of the overall truncated cone precast body is towards the direction of the arrow, as shown in the reference. Figure 18 This allows for a direct view of the entire truncated cone preform within the yarn-adding holes, clearly indicating the warp and weft densities, and enabling weaving through the designated yarn-adding points.
[0221] When this weaving method is adopted, refer to Figure 19 According to Table 1, four fluorescent lamps H2 can be installed on the base H1, and the prefabricated body H4 can be supported by the supporting circular frame H3. After weaving is completed, the fluorescent lamps H2 can be used to illuminate the yarns formed by this weaving method, which can cover the through holes and prevent light transmission or the appearance of through holes, thus achieving protection of cone materials or equipment in engineering.
[0222]
[0223]
[0224] Table 1 shows the number of defect points to be compensated per square meter.
[0225] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.
[0226] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.
[0227] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.
Claims
1. A weaving method for reducing yarn perforation in thin 2.5D prefabricated structures, characterized in that: include, During the weaving process, the initial arrangement of the spindles is a 2.5D weaving array; A new empty spindle array (200) is added to the knitting array (100); and, The yarn on the braided array (100) is transferred to the empty spindle array (200) to form a braided array (100) with empty spindles; After yarn transfer, a pair of warp yarns are inserted to form a stack with the yarns of the weaving array (100); To fill the through hole; During the weaving process, the initial arrangement of the spindles is a 2.5D weaving array; A new array of empty spindles (200) is added to the knitting array (100), namely a first empty spindle column (201) and a second empty spindle column (202); and, The yarn on the spindle of the mother column of the braiding array (100) is moved to the new column, forming a mother column with empty spindles; The empty spindles on the first empty spindle column (201) and the second empty spindle column (202) are combined with the empty spindles of the mother column of the braiding array (100) to form a set of empty spindles; Add a new warp thread to the empty spindle and fold it along the weft thread to fix it onto the empty spindle; The process is repeated sequentially to fill the empty spindles in the newly added columns; The weaving method can be applied to spindles with an even number of spindles in the overall parent column, spindles with an odd number of spindles in the overall parent column, spindles with an even number of spindles in the separate parent column, and spindles with an odd number of spindles in the separate parent column.
2. The weaving method for reducing yarn holes in thin 2.5D preforms according to claim 1, characterized in that: The weaving method, in which the overall parent column has an even number of spindles, involves the following specific weaving steps: The weaving array (100) includes a first row of spindles (101), a second row of spindles (102), a third row of spindles (103), and a fourth row of spindles (104) arranged in sequence, each with an even number of spindles; At the initial position, the odd-numbered columns of the braided array (100) are two spindle spacings lower than the even-numbered columns, and the first empty spindle column (201) and the second empty spindle column (202) are added between the second spindle column (102) and the third spindle column (103). Through shallow bending motion, the distance between the upper two spindles in odd-numbered columns and the distance between the lower two spindles in even-numbered columns; Since the first empty yarn column (201) and the second empty yarn column (202) are added together, the second yarn column (102) and the third yarn column (103) are partially transferred to the first empty yarn column (201) and the second empty yarn column (202). Pairs of warp yarns are inserted into the second spindle column (102) and the third spindle column (103), as well as the first empty spindle column (201) and the second empty spindle column (202), to form a stack; To fill the through hole.
3. The weaving method for reducing yarn holes in thin 2.5D preforms according to claim 2, characterized in that: The first spindle column (101), the second spindle column (102), the third spindle column (103) and the fourth spindle column (104) are even-numbered spindles. The second spindle column (102) and the fourth spindle column (104) are two spindle spacings higher than the first spindle column (101) and the third spindle column (103). The second spindle column (102) includes a second column of first spindle points (102a), a second column of second spindle points (102b), a second column of third spindle points (102c), a second column of fourth spindle points (102d), a second column of fifth spindle points (102e), and a second column of sixth spindle points (102f) arranged in sequence. The third spindle column (103) includes the first spindle point (103a), the second spindle point (103b), the third spindle point (103c), the fourth spindle point (103d), the fifth spindle point (103e), and the sixth spindle point (103f). The first empty spindle column (201) and the second empty spindle column (202) are added together, and the first spindle point (102a) of the second column, the third spindle point (102c) of the second column and the first spindle point (103a) of the third column are moved parallel to the first empty spindle column (201). Move the yarn parallel to the sixth spindle point (102f) of the second column, the fourth spindle point (103d) of the third column, and the sixth spindle point (103f) of the third column to the second empty spindle column (202); Pairs of warp yarns are inserted into the first spindle point (102a) of the second column, the third spindle point (102c) of the second column, and the first spindle point (103a) of the third column at the initial position and the next grid spacing after the yarn transfer position. Pairs of warp yarns are then inserted into the sixth spindle point (102f) of the second column, the fourth spindle point (103d) of the third column, and the sixth spindle point (103f) of the third column at the initial position and the next grid spacing after the yarn transfer position. This achieves stacking with the yarns of the braided array (100) to fill through holes.
4. The weaving method for reducing yarn holes in thin 2.5D preforms according to claim 2 or 3, characterized in that: The weaving method, in which the overall master column has an odd number of spindles, involves the following specific weaving steps: The weaving array (100) includes a first spindle column (101), a second spindle column (102), a third spindle column (103), and a fourth spindle column (104) arranged in sequence, each with an odd number of spindles; At the initial position, the odd-numbered columns of the braided array (100) are two spindle spacings lower than the even-numbered columns, and the first empty spindle column (201) and the second empty spindle column (202) are added between the second spindle column (102) and the third spindle column (103). Through shallow bending motion, the distance between the upper two spindles in odd-numbered columns and the distance between the lower two spindles in even-numbered columns; Since the first empty yarn column (201) and the second empty yarn column (202) are added together, the second yarn column (102) and the third yarn column (103) are partially transferred to the first empty yarn column (201) and the second empty yarn column (202). Pairs of warp yarns are inserted into the second spindle column (102) and the third spindle column (103), as well as the first empty spindle column (201) and the second empty spindle column (202), to form a stack; To fill the through hole.
5. The weaving method for reducing yarn holes in thin 2.5D preforms according to claim 4, characterized in that: The second spindle column (102) includes a second column of first spindle points (102a), a second column of second spindle points (102b), a second column of third spindle points (102c), a second column of fourth spindle points (102d), and a second column of fifth spindle points (102e) arranged in sequence. The second spindle column (102) and the fourth spindle column (104) are two spindle spacings higher than the first spindle column (101) and the third spindle column (103). The third spindle column (103) includes the first spindle point (103a), the second spindle point (103b), the third spindle point (103c), the fourth spindle point (103d), and the fifth spindle point (103e) in the third column. The first empty yarn column (201) and the second empty yarn column (202) are added together, and the third yarn point (102c) of the second column and the first yarn point (103a) of the third column are moved parallel to the first empty yarn column (201). Move the yarn parallel to the fifth spindle point (102e) in the second column and the fourth spindle point (103d) in the third column to the second empty spindle column (202); Pairs of warp yarns are inserted into the initial position and the next grid spacing of the first spindle point (103a) and the fourth spindle point (103d) of the third column, and then into the initial position and the grid spacing of the fifth spindle point (102e) of the second column, and finally into the first empty spindle column (201) and the second empty spindle column (202) at the grid spacing above the fourth spindle point (103d) of the third column. This achieves stacking with the yarns of the braided array (100) to fill through holes.
6. The weaving method for reducing yarn holes in thin 2.5D preforms according to claim 5, characterized in that: The weaving method, in which the number of spindles in the parent column is even, specifically involves the following steps: The weaving array (100) includes a first row of spindles (101), a second row of spindles (102), a third row of spindles (103), and a fourth row of spindles (104) arranged in sequence, each with an even number of spindles; At the initial position, the odd-numbered columns of the weaving array (100) are two spindle spacings lower than the even-numbered columns. The first empty spindle column (201) is added between the second spindle column (102) and the third spindle column (103), and the second empty spindle column (202) is added between the third spindle column (103) and the fourth spindle column (104). Through shallow bending motion, the distance between the two upper spindles in the odd column and the distance between the two lower spindles in the even column are adjusted so that the even column is two spindles higher than the odd column. Since the split structure includes the first empty yarn column (201) and the second empty yarn column (202), the yarn of the first yarn column (101) and the second yarn column (102) is partially transferred to the first empty yarn column (201), and the yarn of the third yarn column (103) and the fourth yarn column (104) is partially transferred to the second empty yarn column (202). Pairs of warp yarns are inserted into the first spindle column (101), the second spindle column (102), the third spindle column (103), and the fourth spindle column (104), as well as the first empty spindle column (201) and the second empty spindle column (202), to form a stack; To fill the through hole.
7. The weaving method for reducing yarn holes in thin 2.5D preforms according to claim 6, characterized in that: The first spindle column (101), the second spindle column (102), the third spindle column (103) and the fourth spindle column (104) are even-numbered spindles. The second spindle column (102) and the fourth spindle column (104) are two spindle spacings higher than the first spindle column (101) and the third spindle column (103). The first spindle column (101) includes a first column of first spindle points (101a), a first column of second spindle points (101b), a first column of third spindle points (101c), a first column of fourth spindle points (101d), a first column of fifth spindle points (101e), and a first column of sixth spindle points (101f) arranged in sequence. The second spindle column (102) includes a second column of first spindle points (102a), a second column of second spindle points (102b), a second column of third spindle points (102c), a second column of fourth spindle points (102d), a second column of fifth spindle points (102e), and a second column of sixth spindle points (102f) arranged in sequence. The third spindle column (103) includes the first spindle point (103a), the second spindle point (103b), the third spindle point (103c), the fourth spindle point (103d), the fifth spindle point (103e), and the sixth spindle point (103f). The fourth spindle column (104) includes the fourth column first spindle point (104a), the fourth column second spindle point (104b), the fourth column third spindle point (104c), the fourth column fourth spindle point (104d), the fourth column fifth spindle point (104e), and the fourth column sixth spindle point (104f) arranged in sequence. The first empty yarn column (201) and the second empty yarn column (202) are added separately, and the first yarn point (101a) of the first column, the first yarn point (102a) of the second column, and the third yarn point (102c) of the second column are moved parallel to the first empty yarn column (201). The first spindle point (103a), the second spindle point (103b), the second spindle point (104b), and the fourth spindle point (104d) in the third column are moved parallel to the second empty spindle column (202). Pairs of warp yarns are inserted into the first spindle point (101a) of the first column, the first spindle point (102a) of the second column, and the third spindle point (102c) of the second column at the initial position and the next grid spacing of the yarn shifting position. Pairs of warp yarns are then inserted into the second spindle point (104b) of the fourth column and the fourth spindle point (104d) of the fourth column at the initial position and the next grid spacing of the yarn shifting position. Finally, at the fifth spindle point (103e) in the third column, a vertical pair of warp yarns are inserted at the next grid spacing and the next two grid spacings below. This achieves stacking with the yarns of the braided array (100) to fill through holes.
8. The weaving method for reducing yarn holes in thin 2.5D preforms according to claim 7, characterized in that: The weaving method, in which the number of spindles in the parent column is even, specifically involves the following steps: The weaving array (100) includes a first spindle column (101), a second spindle column (102), a third spindle column (103), and a fourth spindle column (104) arranged in sequence, each with an odd number of spindles; At the initial position, the odd-numbered columns of the weaving array (100) are two spindle spacings lower than the even-numbered columns. The first empty spindle column (201) is added between the second spindle column (102) and the third spindle column (103), and the second empty spindle column (202) is added between the third spindle column (103) and the fourth spindle column (104). Through shallow bending motion, the distance between the two upper spindles in the odd column and the distance between the two lower spindles in the even column are adjusted so that the even column is two spindles higher than the odd column. Since the split structure includes the first empty yarn column (201) and the second empty yarn column (202), the yarn of the first yarn column (101) and the second yarn column (102) is partially transferred to the first empty yarn column (201), and the yarn of the third yarn column (103) and the fourth yarn column (104) is partially transferred to the second empty yarn column (202). Pairs of warp yarns are inserted into the first spindle column (101), the second spindle column (102), the third spindle column (103), and the fourth spindle column (104), as well as the first empty spindle column (201) and the second empty spindle column (202), to form a stack and fill the through holes; The more specific steps are as follows: The first spindle column (101), the second spindle column (102), the third spindle column (103) and the fourth spindle column (104) are odd number of spindles. The second spindle column (102) and the fourth spindle column (104) are two spindle spacings higher than the first spindle column (101) and the third spindle column (103). The first spindle column (101) includes a first column of first spindle points (101a), a first column of second spindle points (101b), a first column of third spindle points (101c), a first column of fourth spindle points (101d), and a first column of fifth spindle points (101e) arranged in sequence. The second spindle column (102) includes a second column of first spindle points (102a), a second column of second spindle points (102b), a second column of third spindle points (102c), a second column of fourth spindle points (102d), and a second column of fifth spindle points (102e) arranged in sequence. The third spindle column (103) includes the first spindle point (103a), the second spindle point (103b), the third spindle point (103c), the fourth spindle point (103d), and the fifth spindle point (103e) in the third column. The fourth spindle column (104) includes the fourth column first spindle point (104a), the fourth column second spindle point (104b), the fourth column third spindle point (104c), the fourth column fourth spindle point (104d), and the fourth column fifth spindle point (104e) arranged in sequence. The first empty yarn column (201) and the second empty yarn column (202) are added separately, and the first yarn point (101a) of the first column, the first yarn point (102a) of the second column, and the third yarn point (102c) of the second column are moved parallel to the first empty yarn column (201). The first spindle point (103a), the second spindle point (103b), the second spindle point (104b), and the third spindle point (104c) in the third column are moved parallel to the second empty spindle column (202). Pairs of warp yarns are inserted into the first spindle point (101a) of the first column and the first spindle point (102a) of the second column at the initial position and the next grid spacing of the yarn shifting position, and then pairs of warp yarns are inserted into the second spindle point (104b) of the fourth column at the initial position and the next grid spacing of the yarn shifting position. A pair of warp yarns is inserted at the next grid spacing of the fifth spindle point (103e) in the third column and at the initial position of the third spindle point (102c) in the second column, and a pair of warp yarns is inserted at the next grid spacing of the fifth spindle point (103e) in the third column and at the initial position of the fourth spindle point (104d) in the fourth column; This achieves stacking with the yarns of the braided array (100) to fill through holes.
9. The weaving method for reducing yarn holes in thin 2.5D preforms according to any one of claims 3 or 5 to 8, characterized in that: The weaving method is applicable to structures including shallow cross braided straight braids and their variations, shallow cross braided bent braids or shallow cross braided straight braids with warp reinforcement and added normal braiding.