Down jacket quilting line ending stitching process

Abstract

According to the down jacket quilting thread ending stitching process, knots at the tail of a quilting thread are subjected to invisible treatment through a newly-arranged ending stitching method, bypass the outer surface of a top fly and are hidden in a textile fabric on the side edge portion of an opening of the top fly, and the ending knots of the quilting thread do not have obvious marks with different thicknesses like a traditional back stitching method in an attached figure 1 in the specification any more. The process effect of the quilting thread at the top fly of the high-end women's wear is remarkably improved, and compared with a traditional back stitching process, the high-end women's wear is more attractive and exquisite.

Description

Technical Field

[0001] The invention relates to the technical field of sewing technology, and in particular to a quilting finishing needle process for a down jacket. Background Art

[0002] Down jackets are tops filled with down. Due to the weight of down, if it is not restrained, the down will pile up under the clothes, which is neither warm nor beautiful. Therefore, down jackets (or down liners) need to have quilting lines. In the literature on down jacket design, it is generally believed that the yarn spacing should not exceed 20cm, otherwise the uniformity of the filling will still be affected. Therefore, there are multiple quilting lines on the surface of down jackets in the prior art.

[0003] After sewing the quilting thread, the thread ends at the end of the quilting thread need to be knotted. The most common existing process is the reverse stitch process, as shown in the attached manual. Figure 1 As shown, a backstitching operation is performed during the sewing process so that the sewing line can be reversed, thereby fixing the thread end.

[0004] The problem of the prior art is: Figure 1 It can be seen that the reverse stitch process will cause a thicker line type A1 to appear at the end of the quilting line, which creates a parallax of varying thickness with the main part of the quilting line.

[0005] In the field of high-end women's clothing, there are extremely high requirements for the overall beauty and visual effects of clothing. The competition between brands is based on the exquisiteness of various details. This kind of line of varying thickness can be set in an inconspicuous corner of the down jacket, but the front placket of the women's down jacket is the most intuitive place for consumers, where the eyes of self-observation in the mirror or observation by relatives and friends are repeatedly placed.

[0006] Therefore, the quilting at the placket of a down jacket has higher craftsmanship requirements. The quilting needs to be kept simple and smooth, and there should be no obvious signs of thread knots or uneven thickness.

[0007] Moreover, when the down jacket is fastened with the sub-button and the mother button on the placket, a fixing piece is required. The fixing piece and the sub-button (or mother button) are respectively located on the two sides of the placket, and a protrusion connected to the sub-button (or mother button) is provided on the fixing piece, and a hole for the protrusion to pass through is provided on the placket, and the fixing piece is fixed to the placket with the sub-button (or mother button) in this way.

[0008] The holes on the placket are through the fabric. Although they are closed by installing snap buttons and fasteners, the metal riveting structure of the snap buttons will loosen with use, and gaps will appear around the holes, causing down to escape, and the filling to leak out and flow out of the gaps, affecting the quality and beauty of the down jacket.

[0009] However, the existing technology is difficult to meet the above requirements. Therefore, it is necessary to improve the finishing stitch method of the quilting thread at the placket of the down jacket. Summary of the invention

[0010] In order to solve the deficiencies of the above-mentioned technology, the present invention provides a down jacket quilting finishing needle method process.

[0011] The technical solution of the present invention is a down jacket quilting finishing needle method, comprising the following steps: Step S1, placing the placket fabric of the down jacket on a template for an automatic quilting machine, the template being a hinge structure, provided with a plurality of quilting grooves, hooks or clips for fixing the placket fabric, a horsetail lining being attached to the quilting groove, the horsetail lining comprising a rubber strip portion bonded to the template and a plurality of elastic strip portions of a comb-tooth structure extending into the quilting groove, the plurality of elastic strip portions flattening wrinkles of the placket fabric at locations corresponding to the quilting grooves, the length of the quilting grooves being greater than the quilting line length required for the placket fabric; Step S2, assembling the template onto an automatic quilting machine, wherein the automatic quilting machine sews quilting lines on the placket textile fabric in accordance with a preset quilting line trajectory program corresponding to each quilting slot, wherein the quilting lines include thread ends and thread tails, wherein the placket textile fabric includes a side edge of a placket opening, wherein the thread ends are on the placket textile fabric, and the thread tails extend beyond the side edge of the placket opening and are entangled with a plurality of elastic strip portions to form an extended line portion; Step S3, removing the placket textile fabric from the template, taking out the extension line portion by utilizing the deformation of the elastic strip portion, and knotting a side of the extension line portion adjacent to the side edge of the placket opening to form a first knotted portion; Step S4, operating a sewing needle to insert the needle into the side edge of the placket opening and to exit the needle at a certain distance to form a stitch, the tail of the sewing needle carries a traction line, one end of the traction line is knotted with the extension line to form a second knotted part, and the other end enters the side edge of the placket opening with the sewing needle and passes through; Step S5, pulling the traction line to tighten in the needle exit direction, driving the extension line portion to enter the side edge of the placket opening from the needle entrance, tightening the first knotted portion and the second knotted portion, so that the extension line portion is tightened and the second knotted portion and the first knotted portion are close to form a third knotted portion with a volume larger than the needle entrance, so that the third knotted portion is stuck in the side edge of the placket opening; Step S6, smooth the side edge of the placket opening, trim the excess pulling line at the needle hole, and complete the finishing knot of the quilting line.

[0012] Step S7, repeating steps S3 to S6, finishing and knotting the quilting threads at various locations on the placket textile fabric.

[0013] A further configuration of the present invention: Step S4 also includes an operating table, which includes a table top, a magnetic pressure plate, and a plurality of crochet parts. The placket textile is laid on the table top, and the magnetic pressure plate flattens the placket textile and is magnetically attracted to the table top. The magnetic pressure plate is provided with a cantilever portion, and the cantilever portion is provided with a plurality of mounting grooves parallel to the quilting direction. The side of the mounting groove is provided with a rotating hole, and the crochet parts are respectively arranged in each mounting groove. The crochet parts include a wrench portion, a rotating shaft and an arc-shaped needle head. The rotating shaft and the rotating hole are rotatably matched, and the arc-shaped needle head passes through the mounting groove toward the placket textile. The arc-shaped needle head rotates around the rotating shaft, enters the placket textile, and hooks the side edge of the placket opening to bulge in the width direction; the wrench portion extends out of the mounting groove toward the side away from the placket textile, and the rod wrench portion drives the arc-shaped needle head to enter or exit the placket textile.

[0014] The present invention is further configured as follows: the rotating hole is an oblong hole, and the length direction is arranged along the quilting line direction, the rotating shaft and the oblong hole are in rolling friction cooperation, and each hook piece adjusts its position in the oblong hole according to the change of the outline of the placket textile fabric.

[0015] The present invention is further configured as follows: a plurality of mounting grooves and hook needles are arranged on the table top, and are arranged to be opposed to the magnetic pressure plate, so that the side edges of the placket opening are hooked to bulge on the opposite sides.

[0016] A further configuration of the present invention: the template is provided with a plurality of pattern holes corresponding to the installation positions of the snap buttons on the placket textile fabric, and the process also includes step S2.5. After the automatic quilting machine removes the template, the template is installed on a computer pattern machine, and the computer pattern machine sews concentric coils corresponding to the pattern holes. The diameter of the hole for installing the snap buttons is smaller than the concentric coil, and the hole passes through the concentric coil.

[0017] The beneficial effects of the present invention are as follows: 1. Through the newly arranged tail stitch method, the knot of the quilting thread tail is made invisible, bypassing the outer surface of the placket and hidden in the textile fabric at the side edge of the placket opening. Similarly, it can be bypassed to the inner surface of the placket, but the distance to the side edge of the placket opening is shorter, the knotting and fixing effect is better, and the inner edge of the placket is led in the vertical direction. Therefore, it is preferred, and the specific effects are as follows.

[0018] The horsetail lining provided at the quilting groove of the template allows the quilting line to go beyond the placket textile to form an extended line portion.

[0019] A sewing machine cannot produce an empty needle because the working principle of the sewing machine determines that it must use both the upper thread and the lower thread to form a complete stitch. The upper thread working steps of the sewing machine include the needle moving the upper thread downward, entangled with the lower thread on the independent lock cylinder below, and then the needle carrying the two threads upwards penetrates the fabric to form a stitch. If there is only the lower thread but no upper thread, a complete stitch cannot be formed.

[0020] The setting of the horsetail lining enables the upper thread and the lower thread to pass through the elastic strip portion of the comb-tooth structure of the horsetail lining and be wrapped around the elastic strip portion to form an extended line portion. Without this horsetail lining, the empty needle will not be able to form the extended line portion.

[0021] The elastic strip portion can also flatten local wrinkles of the textile at the quilting groove, thereby improving the quality of quilting sewing. Due to the deformation characteristics of the elastic strip portion, it can automatically bounce open when it hits the machine needle, avoiding puncture and needle jamming, and at the same time facilitating the removal of the extension line portion from the elastic strip portion.

[0022] After the placket fabric is removed from the template, a knot is tied on one side of the extension line portion adjacent to the side edge of the placket opening to form a first knotted portion; then, according to steps S4 to S6, a traction line (as shown in the attached manual) is inserted into the side edge of the placket opening. Figure 7 The traction line is tied with the extension line at the tail (as shown in the instruction manual). Figure 8 The other end is pulled down to pull the extension line part together with the first knot part into the side edge of the placket opening (as shown in the attached manual). Figure 8 Then tighten the first knot and the second knot to form a third knot with a diameter larger than the needle hole, so that the third knot is stuck in the side edge of the placket opening. After trimming off the excess traction line, the end knot of the quilting line is completely hidden in the fabric of the side edge of the placket opening (as shown in the attached manual). Fig. 9 shown).

[0023] Using the above process, the knot at the end of the quilting line is no longer as shown in the instructions. Figure 1 Like the traditional backstitch technique, there are obvious traces of varying thicknesses, which hides the knot at the end of the quilting line, significantly improving the quilting effect at the placket of high-end women's clothing, and is more beautiful and refined than the traditional backstitch technique.

[0024] Second, in a further configuration of the present invention, in order to reduce the difficulty of operation in process step S4, an operating table is also designed. Through the structural design of the table top, magnetic pressure plate, and several hook parts, the magnetic pressure plate can assist in fixing the placket textile fabric, and the installation groove, rotating hole (long round hole), and hook parts provided on the cantilever part can be used to cooperate with each other to make the arc needle head rotate around the rotating shaft to enter or exit the fabric on the side edge of the placket opening, and the arc needle head can be hooked and fixed to conveniently make the side edge of the placket opening bulge and fix in the width direction. This makes it unnecessary for the operator to tediously twist up the side edge of the placket opening and then insert the needle. With the assistance of the operating table, the operator can quickly complete the work of knotting and threading the needle.

[0025] A further setting of the operating table can correspond to the edge contour changes of different placket textiles, and adjust the position of the hook piece by using the oblong hole, so that each hook piece can be adjusted to the corresponding contour position. The hook pieces are symmetrically arranged to make the two sides of the placket opening side edge bulge in the width direction, thereby enhancing the flattening and fixing effect of the area.

[0026] 3. Through the setting of step S2.5, use a computer pattern machine to sew concentric coils at the installation position of the snap buckle in advance, and the installation hole passes through the concentric coils. In this way, even if there is a gap in the snap buckle, the filling will not leak out due to the sewing and fixation of the concentric coils, thus avoiding the phenomenon of lint running. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A prior art backstitch reference diagram of an embodiment of the present invention; Figure 2 The template structure of the embodiment of the present invention Figure 1 ; Figure 3 The template structure of the embodiment of the present invention Figure 2 ; Figure 4 The operating table structure of the embodiment of the present invention Figure 2 ; Figure 5 for Figure 4 Sectional view at AA; Figure 6 It is a schematic diagram of the operation of the hook hook member according to an embodiment of the present invention; Figure 7 The process structure of the embodiment of the present invention Figure 1 ; Figure 8 The process structure of the embodiment of the present invention Figure 2 ; Fig. 9 The process structure of the embodiment of the present invention Figure 3 ; Fig.10 It is an exploded view of the magnetic pressure plate according to an embodiment of the present invention.

[0028] Among them, A1-reverse stitch structure, 1-placket textile, 11-placket opening side, 12-concentric coil, 2-template, 21-quilting groove, 22-horsetail lining, 221-rubber strip part, 222-elastic strip part, 3-quilting line, 31-extension line part, 32-first knotting part, 33-third knotting part, 4-traction line, 41-second knotting part, 5-operating table, 51-magnetic pressure plate, 511-cantilever part, 512-installing slot, 513-turning hole, 52-crochet needle, 521-wrench part, 522-rotating shaft, 523-arc needle head.

[0029] In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. DETAILED DESCRIPTION

[0031] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0032] The present invention is described in detail below in conjunction with the accompanying drawings. Figure 1-10 As shown, a down jacket quilting thread 3 finishing needle method process includes the following steps: Step S1, placing the placket textile fabric 1 of the down jacket on a template 2 for an automatic quilting machine, the template 2 being a hinge structure, provided with a plurality of quilting grooves 21, and hooks or clips for fixing the placket textile fabric 1, the quilting grooves 21 being provided with a horsetail lining 22, the horsetail lining 22 comprising a rubber strip portion 221 bonded to the template 2, and a plurality of elastic strip portions 222 of a comb-tooth structure extending into the quilting groove 21, the plurality of elastic strip portions 222 flattening wrinkles of the placket textile fabric 1 at the corresponding portions of the quilting groove 21, the length of the quilting groove 21 being greater than the length of the quilting line 3 required for the placket textile fabric 1; Step S2, assembling the template 2 onto the automatic quilting machine, and the automatic quilting machine sews quilting lines 3 on the placket textile fabric 1 in correspondence with each quilting slot 21 according to a preset quilting line 3 trajectory program, wherein the quilting lines 3 include thread ends and thread tails, and the placket textile fabric 1 includes a placket opening side edge portion 11, the thread ends are on the placket textile fabric 1, and the thread tails go beyond the placket opening side edge portion 11 and are entangled with a plurality of elastic strip portions 222 to form an extension line portion 31; Step S3, remove the placket textile fabric 1 from the template 2, take out the extension line portion 31 by using the deformation of the elastic strip portion 222, and knot the side of the extension line portion 31 adjacent to the placket opening side edge portion 11 to form a first knotted portion 32; Step S4, operating a sewing needle to insert the needle into the side edge portion 11 of the placket opening, and to exit the needle at a certain distance to form a stitch, the tail of the sewing needle carries a traction line 4, one end of the traction line 4 is knotted with the extension line to form a second knotted portion 41, and the other end enters the side edge portion 11 of the placket opening with the sewing needle and passes through; Step S5, pull the traction line 4 to tighten in the needle exit direction, drive the extension line portion 31 to enter the side edge portion 11 of the placket opening from the needle entrance, tighten the first knotted portion 32 and the second knotted portion 41, so that the extension line portion 31 is tightened and the second knotted portion 41 and the first knotted portion 32 are close to form a third knotted portion 33 with a volume larger than the needle entrance, so that the third knotted portion 33 is stuck in the side edge portion 11 of the placket opening; Step S6, smoothing the side edge 11 of the placket opening, trimming the excess pulling thread 4 at the needle mouth, and completing the finishing knot of the quilting thread 3.

[0033] Step S7, repeating steps S3 to S6, and knotting the quilting threads 3 at various locations on the placket textile fabric 1.

[0034] The step S4 further comprises an operating table 5, which comprises a table top, a magnetic pressure plate 51, and a plurality of hook parts 52. The placket textile 1 is laid on the table top, the magnetic pressure plate 51 flattens the placket textile 1 and is magnetically attracted to the table top, the magnetic pressure plate 51 is provided with a cantilever portion 511, the cantilever portion 511 is provided with a plurality of mounting grooves 512 parallel to the quilting line 3, and the side of the mounting groove 512 is provided with a rotating hole 51 3. Each hook needle member 52 is respectively arranged in each installation groove 512. The hook needle member 52 includes a wrench portion 521, a rotating shaft 522 and an arc-shaped needle head 523. The rotating shaft 522 is rotatably matched with the rotating hole 513. The arc-shaped needle head 523 passes through the installation groove 512 toward the placket textile fabric 1. The arc-shaped needle head 523 rotates around the rotating shaft 522, enters the placket textile fabric 1, and hooks the side edge portion 11 of the placket opening to bulge in the width direction. The lever portion 521 extends out of the mounting groove 512 toward a side away from the placket textile fabric 1 , and the lever lever portion 521 drives the arc-shaped needle head 523 to enter or exit the placket textile fabric 1 .

[0035] The rotating hole 513 is an oblong hole, and the length direction is arranged along the quilting line 3. The rotating shaft 522 is in rolling friction cooperation with the oblong hole, and each hook piece 52 adjusts its position in the oblong hole according to the contour change of the placket textile fabric 1.

[0036] The table top is provided with a plurality of mounting grooves 512 and hook needle members 52, and is arranged to be supported against the magnetic pressure plate 51, so as to hook the side edge 11 of the placket opening to bulge on the opposite side.

[0037] The template 2 is provided with a plurality of pattern holes 23 corresponding to the mounting positions of the snap buttons on the placket textile fabric 1. The process also includes step S2.5. After the automatic quilting machine removes the template 2, the template 2 is installed on a computer pattern machine. The computer pattern machine sews concentric coils 12 corresponding to the pattern holes 23. The diameter of the hole for installing the snap buttons is smaller than the concentric coil 12, and the hole passes through the concentric coil 12.

[0038] The beneficial effects of the present invention are as follows: 1. Through the newly set tail stitch method, the knot of the quilting thread 3 is made invisible, bypassing the outer surface of the placket and hidden in the textile fabric of the side edge 11 of the placket opening. Similarly, it can be bypassed to the inner surface of the placket, but the distance to the side edge 11 of the placket opening is shorter, the knotting and fixing effect is better, and the inner edge of the placket is led in the vertical direction, so it is preferred. The specific effects are as follows.

[0039] The horsetail lining 22 provided at the quilting groove 21 of the template 2 allows the quilting line 3 to go beyond the placket textile fabric 1 to form an extended line portion 31 .

[0040] A sewing machine cannot produce an empty needle because the working principle of the sewing machine determines that it must use both the upper thread and the lower thread to form a complete stitch. The upper thread working steps of the sewing machine include the needle moving the upper thread downward, entangled with the lower thread on the independent lock cylinder below, and then the needle carrying the two threads upwards penetrates the fabric to form a stitch. If there is only the lower thread but no upper thread, a complete stitch cannot be formed.

[0041] The arrangement of the horsetail lining 22 enables the upper thread and the lower thread to pass through the elastic strip portion 222 of the comb-tooth structure of the horsetail lining 22 and be wound around the elastic strip portion 222 to form an extended line portion 31. Without the horsetail lining 22, the empty needle will not be able to form the extended line portion 31.

[0042] The elastic strip portion 222 can also flatten local wrinkles of the textile at the quilting groove 21, thereby improving the sewing quality of the quilting line 3. Due to the deformation characteristics of the elastic strip portion 222, it can automatically bounce open when it hits the machine needle, avoiding puncture and needle jamming, and at the same time facilitating the removal of the extension line portion 31 from the elastic strip portion 222.

[0043] After the placket textile fabric 1 is removed from the template 2, a knot is formed on one side of the extension line portion 31 adjacent to the placket opening side edge portion 11 to form a first knotted portion 32; then, according to steps S4 to S6, a traction line 4 (as shown in the attached manual) is inserted into the placket opening side edge portion 11. Figure 7 The traction line 4 is tied with the extension line 31 by the tail (as shown in the attached manual). Figure 8 The other end is pulled down to pull the extension line portion 31 together with the first knotted portion 32 into the side edge portion 11 of the placket opening (as shown in the attached manual). Figure 8 The first knotted portion 32 and the second knotted portion 41 are then tightened to form a third knotted portion 33 having a diameter larger than the needle insertion port, so that the third knotted portion 33 is stuck in the side edge portion 11 of the placket opening. After trimming off the excess traction line 4, the end knot of the quilting line 3 becomes completely hidden in the fabric of the side edge portion 11 of the placket opening (as shown in the attached manual). Fig. 9 shown).

[0044] By using the above process, the end knot of the quilting thread 3 is no longer as shown in the attached manual. Figure 1 Like the traditional backstitch technique, there are obvious traces of varying thicknesses, which hides the knot at the end of the quilting line 3, significantly improving the craftsmanship of the quilting line 3 at the placket of high-end women's clothing, and is more beautiful and refined than the traditional backstitch technique.

[0045] 3. In a further configuration of the present invention, in order to reduce the difficulty of operation of process step S4, an operating table 5 is also designed. Through the structural design of the table top, magnetic suction pressure plate 51, and several hook needles 52, the magnetic suction pressure plate 51 can assist in fixing the placket textile 1, and can utilize the mutual cooperation of the mounting groove 512, the rotating hole 513 (long round hole), and the hook needle 52 provided on the cantilever part 511 to make the arc needle 523 rotate around the rotating shaft 522 to enter or exit the fabric of the side edge 11 of the placket opening, and utilize the hooking and fixing of the arc needle 523 to conveniently make the side edge of the placket opening bulge and fix in the width direction. This makes it unnecessary for the operator to tediously twist up the side edge 11 of the placket opening and then insert the needle. With the assistance of the operating table 5, the operator can quickly complete the work of knotting and threading the needle.

[0046] The operating table 5 is further configured to adjust the position of the hook piece 52 according to the edge contour changes of the placket textile 1 by using the oblong hole, so that each hook piece 52 is adjusted to the corresponding contour position. The hook pieces 52 are symmetrically arranged so that the two sides of the placket opening side edge 11 are raised in the width direction, thereby enhancing the flattening and fixing effect of the area.

[0047] 3. Through the setting of step S2.5, a computer pattern machine is used to sew concentric coils 12 in advance at the installation position of the snap buckle, and the installation hole passes through the concentric coils 12. In this way, even if there is a gap in the snap buckle, the filling will not leak out due to the sewing and fixation of the concentric coils 12, thus avoiding the phenomenon of lint running.

[0048] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A down jacket quilting finishing needle process, characterized in that: The following steps are included: Step S1, placing the placket fabric of the down jacket on a template for an automatic quilting machine, the template being a hinge structure, provided with a plurality of quilting grooves, hooks or clips for fixing the placket fabric, a horsetail lining being attached to the quilting groove, the horsetail lining comprising a rubber strip portion bonded to the template and a plurality of elastic strip portions of a comb-tooth structure extending into the quilting groove, the plurality of elastic strip portions flattening wrinkles of the placket fabric at locations corresponding to the quilting grooves, the length of the quilting grooves being greater than the quilting line length required for the placket fabric; Step S2, assembling the template onto an automatic quilting machine, wherein the automatic quilting machine sews quilting lines on the placket textile fabric in accordance with a preset quilting line trajectory program corresponding to each quilting slot, wherein the quilting lines include thread ends and thread tails, wherein the placket textile fabric includes a side edge of a placket opening, wherein the thread ends are on the placket textile fabric, and the thread tails extend beyond the side edge of the placket opening and are entangled with a plurality of elastic strip portions to form an extended line portion; Step S3, removing the placket textile fabric from the template, taking out the extension line portion by utilizing the deformation of the elastic strip portion, and knotting a side of the extension line portion adjacent to the side edge of the placket opening to form a first knotted portion; Step S4, operating a sewing needle to insert the needle into the side edge of the placket opening and to exit the needle at a certain distance to form a stitch, the tail of the sewing needle carries a traction line, one end of the traction line is knotted with the extension line to form a second knotted part, and the other end enters the side edge of the placket opening with the sewing needle and passes through; Step S5, pulling the traction line to tighten in the needle exit direction, driving the extension line portion to enter the side edge of the placket opening from the needle entrance, tightening the first knotted portion and the second knotted portion, so that the extension line portion is tightened and the second knotted portion and the first knotted portion are close to form a third knotted portion with a volume larger than the needle entrance, so that the third knotted portion is stuck in the side edge of the placket opening; Step S6, smoothing the side edge of the placket opening, trimming the excess traction line at the needle mouth, and completing the finishing knot of the quilting line; Step S7, repeating steps S3 to S6, finishing and knotting the quilting threads at various locations on the placket textile fabric.

2. The down jacket quilting finishing needle process according to claim 1, characterized in that: The step S4 also includes an operating table, which includes a table top, a magnetic pressure plate, and a plurality of hook needles. The placket textile is laid on the table top, and the magnetic pressure plate flattens the placket textile and is magnetically attracted to the table top. The magnetic pressure plate is provided with a cantilever portion, and the cantilever portion is provided with a plurality of mounting grooves parallel to the quilting direction. The side of the mounting groove is provided with a rotating hole, and each hook needle is respectively arranged in each mounting groove. The hook needle includes a wrench portion, a rotating shaft and an arc-shaped needle head. The rotating shaft is rotatably matched with the rotating hole. The arc-shaped needle head passes through the mounting groove toward the placket textile. The arc-shaped needle head rotates around the rotating shaft, enters the placket textile, and hooks the side edge of the placket opening to bulge in the width direction; The lever part goes beyond the installation slot toward a side away from the placket textile fabric, and the lever lever part drives the arc-shaped needle head to enter or exit the placket textile fabric.

3. The down jacket quilting finishing needle process according to claim 2, characterized in that: The rotating hole is an oblong hole, and the length direction is arranged along the quilting line direction. The rotating shaft and the oblong hole are in rolling friction cooperation, and each hook piece adjusts its position in the oblong hole according to the change of the outline of the placket textile fabric.

4. The down jacket quilting finishing needle process according to claim 3, characterized in that: A plurality of mounting grooves and hook needles are arranged on the table top, and the table top is arranged to be supported against the magnetic suction pressure plate, so that the side edges of the placket opening are hooked to bulge on the opposite sides.

5. The down jacket quilting finishing needle process according to claim 1, characterized in that: The template is provided with a plurality of pattern holes corresponding to the installation positions of the snap buttons on the placket textile fabric. The process also includes step S2.

5. After the automatic quilting machine removes the template, the template is installed on a computer pattern machine. The computer pattern machine sews concentric coils corresponding to the pattern holes. The diameter of the hole for installing the snap buttons is smaller than the concentric coil and passes through the concentric coil.

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