Device for stitching zipper by twin-needle machine
By designing a device for attaching zippers using a double-needle sewing machine, synchronous attachment of zippers on both sides was achieved, solving the problems of low processing efficiency and difficulty in controlling symmetry in existing technologies, thus improving product quality and production efficiency.
Patent Information
- Application Number
- CN202423028820.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing technologies for zipper assembly have low processing efficiency, making it difficult to ensure symmetry of the fabric on both sides. Misalignment or inconsistent tension can easily occur, especially on plaid fabrics where quality control is difficult and the rework rate is high. Furthermore, existing double-needle sewing machines cannot achieve synchronous zipper assembly with both threads.
Design a device for attaching zippers with double needles, including a presser foot for attaching zippers with double needles and a T-shaped positioning piece. The presser foot is provided with a needle hole and a locking tooth channel. The T-shaped positioning piece is used to fix the starting point of the zipper and realize the synchronous attachment of zippers on both sides through a double needle sewing machine.
It improves the flatness and symmetry of zippers, simplifies the production process, increases production efficiency, reduces the difficulty of the process, and can be operated by ordinary sewing workers, significantly improving product quality and reducing the rework rate.
Smart Images
Figure CN223510108U_ABST
Abstract
Description
Technical fields:
[0001] This utility model relates to the field of textile and garment processing technology, specifically a double-needle sewing zipper device with a reasonable structure and simple operation, which can improve zipper sewing efficiency and improve the flatness and symmetry of the zipper, thereby improving product quality. Background technology:
[0002] Zippers are widely used components in the manufacturing of clothing, shoes, bags, and other daily necessities. Currently, when attaching zippers, only one side can be attached first, and then the other half is attached from the opposite direction. To ensure the fabric on both sides is aligned, the operator needs to repeatedly align or manually mark and position them, resulting in low processing efficiency. The finished zippers are also prone to issues such as one side being loose and the other tight, or misalignment at the front edge. The quality is even more difficult to control when attaching zippers to plaid fabrics, leading to a sharp increase in the rework rate. Attaching zippers has become a technical challenge, requiring highly skilled technicians to perform well. Furthermore, while existing double-needle sewing machines can achieve double-thread sewing, they cannot simultaneously attach both sides of the zipper to the front edge of the garment. Summary of the Invention:
[0003] This utility model addresses the shortcomings and deficiencies of existing technologies by proposing a double-needle sewing zipper device that utilizes existing double-needle sewing machines, is easy to operate, and can improve the flatness and symmetry of the zipper, thereby enhancing product quality.
[0004] This utility model achieves its purpose through the following measures:
[0005] A device for attaching double-needle zippers is characterized by comprising a presser foot for attaching double-needle zippers and a T-shaped positioning plate. The presser foot is located above the T-shaped positioning plate. The presser foot includes a presser foot base, an upper cover plate, and a connecting part. The connecting part is connected to the rear end of the presser foot base and has a vertical section. The vertical section of the connecting part has mounting holes for connecting with a double-needle sewing machine. The upper cover plate is fixed to the front of the presser foot base. Both sides of the upper cover plate are bent downwards and inwards towards the center line of the upper cover plate to form two locking tooth channels on the left and right sides. Two pin holes are provided on the upper part of the upper cover plate, and the two pin holes correspond to the zippers to be processed in the two locking tooth channels respectively. The upper surface of the vertical section of the T-shaped positioning plate has a center line mark, and the two pin holes on the upper cover plate are located on both sides of the vertical section of the T-shaped positioning plate.
[0006] The double-needle zipper presser foot of this invention has a lock tooth channel length on one side that is shorter than that on the other side, so as to reserve the position of the zipper pull. This allows the presser foot pressure to be evenly distributed on the zipper webbing, and the forced action of the lock tooth channel allows both sides of the zipper to be neatly and regularly sewn onto the garment.
[0007] The vertical end of the T-shaped positioning piece of this utility model extends to the outside of the double-sided zipper presser foot component. The end of the T-shaped positioning piece is provided with a notch corresponding to the center line mark for easy alignment during operation. The T-shaped positioning piece has double-sided adhesive on both the top and bottom, which can be temporarily fixed to the starting position of the garment zipper. The starting points of the left and right zippers can also be temporarily fixed to the T-shaped piece.
[0008] This invention enables simultaneous zipper attachment on both sides of the garment by providing double needle holes on the front of the presser foot for attaching zippers. During use, the T-shaped positioning piece is attached to the zipper position on the front panel of the garment, aligning the center line of the vertical end of the T-shaped positioning piece with the center line of the front panel (including the left and right body panels). The presser foot for attaching zippers is then connected to the double-needle sewing machine through the mounting hole. The starting points of the left and right sides of the zipper are aligned with the center line of the T-shaped positioning piece. The zipper is attached and placed so that both sides of the zipper pass through the locking teeth channels on both sides of the presser foot of the double-needle zipper attaching machine simultaneously, thus being sewn onto the front piece of the garment to be processed. Since the two needle holes of the presser foot of the double-needle zipper attaching machine are located on the outside of the vertical section of the T-shaped positioning piece, the zippers on both sides are always processed synchronously along the center line of the vertical section of the T-shaped positioning piece and the center line of the front piece of the garment during the sewing process. After sewing is completed, the T-shaped positioning piece is removed, and the front piece of the garment is cut along the center line to complete the zipper attachment.
[0009] The beneficial effects of this utility model are that it simplifies the production process, doubles the production efficiency, reduces the difficulty of the process, and can be operated by ordinary sewing workers. Because the zipper components on both sides are processed simultaneously, the flatness is significantly improved, the overall quality of the product is improved, and the rework rate is greatly reduced. Attached image description:
[0010] Appendix Figure 1 This is a schematic diagram of the structure of this utility model.
[0011] Appendix Figure 2 This is a schematic diagram of the presser foot used for double-needle zipper stitching in this utility model.
[0012] Appendix Figure 3 This is a schematic diagram of the structure of the T-shaped positioning piece in this utility model.
[0013] Figure reference numerals: 1. Presser foot for double-needle zipper assembly; 2. T-shaped positioning piece; 3. Presser foot base; 4. Top cover plate; 5. Connecting part; 6. Mounting hole; 7. Lock tooth channel; 8. Pin hole. Detailed implementation method:
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0015] As attached Figure 1As shown, this utility model proposes a device for attaching a double-needle zipper, including a presser foot 1 for attaching a double-needle zipper and a T-shaped positioning piece 2. The presser foot 1 is located above the T-shaped positioning piece 2. The presser foot 1 includes a presser foot base 3, an upper cover plate 4, and a connecting part 5. The connecting part 5 is connected to the rear end of the presser foot base 3. The connecting part 5 has a vertical section, and a mounting hole 6 for connecting to a double-needle sewing machine is opened on the vertical section of the connecting part 5. The upper cover plate 4 is fixed to the front part of the presser foot base 3. Both sides of the upper cover plate 4 are bent downwards and inwards towards the center line of the upper cover plate to form two locking tooth channels 7 on the left and right sides. Two pin holes 8 are provided on the upper part of the upper cover plate 4, as shown in the attached figure. Figure 2 As shown, the pinhole 8 is strip-shaped, and the two pinholes 8 correspond to the zippers to be processed in the two locking tooth channels 7 respectively; the upper surface of the vertical section of the T-shaped positioning piece 2 is marked with a center line, and the two pinholes 8 on the upper cover plate 4 are located on both sides of the vertical section of the T-shaped positioning piece 1 respectively.
[0016] As attached Figure 2 As shown, in the double-needle zipper presser foot 1 of this utility model, the length of the locking tooth channel on one side is smaller than the length of the locking tooth channel on the other side, so as to reserve the position of the zipper pull head, thereby making the pressure of the presser foot evenly distributed on the zipper webbing.
[0017] The vertical end of the T-shaped positioning piece 2 of this utility model extends to the outside of the double-sided zipper presser foot component 1. The end of the T-shaped positioning piece 2 is provided with a notch corresponding to the center line mark, which is used to facilitate alignment during operation.
[0018] This invention enables simultaneous zipper attachment on both sides by providing double needle holes 8 on the front of the presser foot 1 for attaching zippers on a double-needle sewing machine. During use, the T-shaped positioning piece 2 is attached to the front piece of the garment to be processed using double-sided adhesive, aligning the center line of the vertical end of the T-shaped positioning piece 2 with the center line of the front piece of the garment (including the left and right bodice pieces). The presser foot 1 for attaching zippers on the double-needle sewing machine is connected to the double-needle sewing machine through the mounting hole 6. The left and right sides of the zipper are aligned with the center of the T-shaped positioning piece 2. The thread is positioned so that both sides of the zipper pass through the locking tooth channels 7 on both sides of the presser foot 1 for attaching the zipper on the double needle sewing machine, thus simultaneously sewing them onto the front piece of the garment to be processed. Since the two needle holes 8 of the presser foot 1 for attaching the zipper on the double needle sewing machine are located on the outside of the vertical section of the T-shaped positioning piece 2, the zippers on both sides are always processed synchronously along the center line of the vertical section of the T-shaped positioning piece 2 and the center line of the front piece of the garment during the sewing process. After the sewing is completed, the T-shaped positioning piece is removed, and the front piece of the garment is cut along the center line to complete the zipper attachment.
[0019] The beneficial effects of this utility model are that it simplifies the production process, and ordinary sewing workers can also operate it. Because the zipper components on both sides are processed simultaneously, the flatness is significantly improved, the overall quality of the product is improved, and the rework rate is greatly reduced.
Claims
1. A device for attaching a double-needle zipper, characterized in that, The device includes a presser foot for double-needle zipper assembly and a T-shaped positioning plate. The presser foot is located above the T-shaped positioning plate and includes a presser foot base, a top cover, and a connecting part. The connecting part is connected to the rear end of the presser foot base and has a vertical section. The vertical section of the connecting part has mounting holes for connecting to a double-needle sewing machine. The top cover is fixed to the front of the presser foot base. Both sides of the top cover are bent downwards and inwards towards the center line of the top cover to form two locking tooth channels on the left and right sides. Two pin holes are provided on the top of the top cover, and the two pin holes correspond to the zippers to be processed in the two locking tooth channels respectively. The upper surface of the vertical section of the T-shaped positioning plate has a center line mark, and the two pin holes on the top cover are located on both sides of the vertical section of the T-shaped positioning plate.
2. The double-needle sewing zipper device according to claim 1, characterized in that, The length of the locking tooth channel on one side of the presser foot used for double-needle zipper stitching is shorter than that on the other side, so as to reserve the position of the zipper pull head, thereby making the pressure of the presser foot evenly distributed on the zipper webbing.
3. The double-needle zipper attaching device according to claim 1, characterized in that, The vertical end of the T-shaped positioning piece extends to the outside of the double-sided zipper presser foot component, and the end of the T-shaped positioning piece is provided with a notch corresponding to the center line mark to facilitate alignment during operation.
4. The double-needle sewing zipper device according to claim 3, characterized in that, The T-shaped positioning piece has double-sided adhesive on both the top and bottom.