Numerical control automatic thread trimming overedger
By using an electric push rod and positioning plate to fix the fabric in a CNC automatic thread-cutting overlock sewing machine, combined with an automatic blade to cut the thread, the problems of fabric offset and inaccurate thread cutting in traditional overlock sewing machines are solved. This achieves automated positioning and stable thread cutting, improving production efficiency and product quality.
Patent Information
- Application Number
- CN202520241660.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-02-17
AI Technical Summary
Traditional overlock sewing machines rely on manual operation, which can lead to fabric misalignment, wrinkles, incomplete or excessive thread trimming, low efficiency, and negatively impact product quality.
The machine uses a CNC automatic thread cutting and overlock sewing machine. It uses electric push rods and positioning plates to fix the fabric, combined with automated blades to cut the thread. The control panel realizes automatic positioning and thread cutting. The thread spool is fixed by the clamps and magnets to provide a stable supply of thread.
It achieves automated fabric positioning and precise thread cutting, reduces manual intervention, improves production efficiency, ensures sewing quality and stable fixation of the thread spool, and simplifies the operation process.
Smart Images

Figure CN223705955U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of overlock machine technology, especially to a numerical control automatic thread trimming overlock machine. BACKGROUND
[0002] Overlock machines (also known as serging machines or overlockers) are widely used in the fields of textiles, clothing, leather products, etc., and are mainly used for folding and sewing the edges of fabrics to prevent the edges from spreading out or wearing out. They can provide an aesthetically pleasing and durable edge treatment and are widely used in the production of clothing, curtains, bed sheets, towels, and other fabric products.
[0003] Traditional overlock machines usually rely on operators to manually place and secure the fabric on the workbench, which requires frequent adjustments to the fabric position to ensure sewing accuracy. This manual operation is not only inefficient but also prone to causing fabric displacement or wrinkles, which can affect the quality of the final product. In addition, the process of trimming the fabric usually needs to be done manually by the operator, but the trimming process can easily result in incomplete or excessive trimming.
[0004] Therefore, there is a need to design a numerical control automatic thread trimming overlock machine to solve the above technical problems. SUMMARY
[0005] To overcome the shortcomings, the utility model provides a numerical control automatic thread trimming overlock machine.
[0006] The technical implementation scheme of the utility model is as follows: a numerical control automatic thread trimming overlock machine, comprising an overlock machine body, a control panel, a sewing device, a housing, an electric push rod, a push block, a positioning plate, an anti-slip table, a first rack, a bracket, a gear, a second rack, a protrusion, a mounting block, a rotating shaft, a guide rail plate, and a blade, the control panel is arranged on one side of the upper part of the overlock machine body, the sewing device is installed on the bottom edge of the other side of the upper part of the overlock machine body, the housing is arranged on the side wall surface of the middle part of the overlock machine body, the electric push rod is installed on one side of the upper part inside the overlock machine body, the push block is arranged on the driving side of the electric push rod, the positioning plate is arranged on one side of the push block, the anti-slip table is embeddedly arranged on the operating table surface below the overlock machine body, the first rack is arranged on one side of the rear part of the push block, the bracket is arranged on one side of the upper part of the housing, the gear is rotatably arranged in the middle part of the bracket, the second rack is slidably arranged on one side inside the bracket and engaged with the gear, the first rack is also slidably arranged inside the bracket and engaged with the gear, the housing covers the outside of the push block and the components thereon, the protrusion is arranged on the outside of the lower side of the second rack, the mounting block is arranged on the rear side corresponding to the protrusion on the upper part of the housing, the rotating shaft is rotatably arranged in the mounting block, the guide rail plate is arranged on one side of the outside of the rotating shaft, the guide rail of the guide rail plate is sleeved on the outside of the protrusion, the protrusion is slidably and rotatably arranged in the guide rail of the guide rail plate, the blade is arranged on the other side of the outside of the rotating shaft, a slot is formed on the operating table of the overlock machine body and the anti-slip table, and the blade is arranged above the slot.
[0007] Furthermore, it also includes a fixing block, a lamp tube, and a lamp cover. The fixing block is set on the bottom surface of the upper part of the overlock sewing machine body, the fixing block is fitted with a lamp tube, and the lamp tube is fitted with a lamp cover.
[0008] Furthermore, it also includes a mounting plate and locking posts. The mounting plate is located on the upper front side of the main body of the overlock sewing machine, and multiple locking posts are equidistantly arranged on the mounting plate.
[0009] Furthermore, it also includes a limiting post and a magnet. The limiting post is slidably arranged inside the locking post, and a magnet is arranged between the limiting post and the locking post to attract each other.
[0010] Furthermore, the control panel is electrically connected to the sewing machine and the electric push rod.
[0011] Furthermore, the end of the limiting post is provided with an outwardly expanding ring plate.
[0012] Beneficial effects: 1. This utility model uses an electric push rod to drive the push block to move downwards, while the positioning plate presses on the fabric to ensure that the fabric is fixed in position, thus achieving automated positioning and reducing manual intervention; as the rotating shaft rotates, the protrusion slides and rotates along the guide rail of the guide plate, eventually driving the blade to cut the seam thread, thus achieving automatic thread cutting and avoiding the tediousness and inaccuracy of manual thread cutting.
[0013] 2. This utility model makes it easier to replace the spool by using a locking post, a limiting post, and a magnet, and can better fix the spool, thereby simplifying the replacement and management of the spool and reducing downtime. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0015] Figure 2 This is a partial cross-sectional structural diagram of the overlock sewing machine body, support frame, gears, and other components of this utility model.
[0016] Figure 3 This is a three-dimensional structural diagram of the components such as the protrusion, mounting block, and rotating shaft of this utility model.
[0017] Figure 4 This is a three-dimensional structural diagram of the components of this utility model, including the rotating shaft, guide rail plate, and fixing block.
[0018] Figure 5 This is a three-dimensional structural diagram of the fixing block, lamp tube, and lampshade components of this utility model.
[0019] Figure 6 This is a three-dimensional structural diagram of the components of this utility model, including the locking post, the limiting post, and the magnet.
[0020] The above-mentioned attached drawings include the following reference numerals: 1. Overlock sewing machine body, 2. Control panel, 3. Sewing machine, 4. Housing, 5. Electric push rod, 6. Push block, 7. Positioning plate, 8. Anti-slip table, 9. First rack, 10. Bracket, 11. Gear, 12. Second rack, 13. Protrusion, 14. Mounting block, 15. Rotating shaft, 16. Guide rail plate, 17. Blade, 18. Slot, 19. Fixing block, 20. Lamp tube, 21. Lamp cover, 22. Mounting plate, 23. Locking post, 24. Limiting post, 25. Magnet. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.
[0022] Example: A CNC automatic thread trimming and overlock sewing machine, such as Figures 1-6As shown, the machine includes a main body 1, a control panel 2, a sewing machine 3, a housing 4, an electric push rod 5, a push block 6, a positioning plate 7, an anti-slip table 8, a first rack 9, a bracket 10, a gear 11, a second rack 12, a protrusion 13, a mounting block 14, a rotating shaft 15, a guide rail 16, and a blade 17. The main body 1 provides the core structure of the entire CNC automatic thread-cutting overlock machine, carrying all functional components. The control panel 2 is located on one side of the upper part of the main body 1, and the sewing machine 3 is installed on the bottom edge of the other side of the upper part of the main body 1, which performs the actual sewing. The key components of the machine include a housing 4 on the side wall of the middle part of the overlock sewing machine body 1, an electric push rod 5 installed on the upper side of the inside of the overlock sewing machine body 1, a control panel 2 electrically connected to the sewing machine 3 and the electric push rod 5, and the control panel 2 can start and control the movement of the sewing machine 3 and the electric push rod 5, set sewing parameters, and monitor the working status. A push block 6 is installed on the drive of the electric push rod 5, and a positioning plate 7 is installed on one side of the push block 6. An anti-slip table 8 is embedded in the operating table below the overlock sewing machine body 1, and a first toothed rack 9 is installed on one side of the rear of the push block 6. A bracket 10 is provided on one side of the upper part of the outer casing 4. A gear 11 is rotatably mounted in the middle of the bracket 10. A second rack 12, which meshes with the gear 11, is slidably mounted inside the bracket 10 on one side. One side of the first rack 9 also slides inside the bracket 10 and meshes with the gear 11. The outer casing 4 covers the push block 6 and all its components. A protrusion 13 is provided on the lower outer side of the second rack 12. A mounting block 14 is provided on the upper part of the outer casing 4 behind the protrusion 13. A rotating shaft 15 is rotatably mounted inside the mounting block 14. A guide rail plate 16 is provided on one side of the rotating shaft 15. The guide rail of the guide plate 16 is sleeved on the outside of the protrusion 13. The protrusion 13 slides and rotates inside the guide rail of the guide plate 16. A blade 17 is provided on the other side of the outside of the rotating shaft 15. When the protrusion 13 slides and rotates along the guide rail of the guide plate 16, the blade 17 is driven to perform a cutting action, completing the automatic cutting of the thread. A slot 18 is opened on the anti-slip table 8 and the operating table of the overlock sewing machine body 1. The blade 17 is located above the slot 18. The slot 18 ensures that the blade 17 can smoothly enter and complete the cutting action, avoiding the tedious and inaccurate problems of manual thread cutting.
[0023] like Figure 1 , Figure 4 and Figure 5 As shown, it also includes a fixing block 19, a lamp tube 20 and a lamp cover 21. The fixing block 19 is provided on the upper bottom surface of the overlock sewing machine body 1. The fixing block 19 is fitted with a lamp tube 20. The lamp tube 20 is fitted with a lamp cover 21. The lamp tube 20 is fitted with a lamp cover 21 to provide sufficient lighting and help the operator see the work area clearly, especially in the case of insufficient light, to ensure accurate operation.
[0024] like Figure 1 , Figure 4 and Figure 6As shown, it also includes an installation plate 22 and locking posts 23. The installation plate 22 is provided on the upper front side of the main body of the overlock sewing machine. Multiple locking posts 23 are equidistantly arranged on the installation plate 22. The locking posts 23 are used to place the thread spool to ensure that the thread spool will not shake or fall off during use, and to maintain the stability of the thread supply.
[0025] like Figure 6 As shown, it also includes a limiting post 24 and a magnet 25. The limiting post 24 is slidably arranged inside the locking post 23. The end of the limiting post 24 is provided with an outwardly expanding ring plate. The limiting post 24 and the locking post 23 are provided with a magnet 25 that attracts each other. The limiting post 24 is used to accurately position the spool. The outwardly expanding ring plate ensures that the spool is placed stably. The magnet 25 provides additional fixing force to prevent the spool from accidentally coming loose.
[0026] In use, place the fabric to be processed on the anti-slip table 8, which ensures that the fabric does not shift. Activate the electric push rod 5, driving the push block 6 downwards. The positioning plate 7 on one side of the push block 6 lightly presses against the fabric to ensure its fixed position. Start the sewing machine 3 via the control panel 2. The sewing machine 3 performs the sewing operation according to the preset program. When the electric push rod 5 drives the push block 6 to move, the first rack 9 drives the gear 11 to rotate, and the gear 11 then drives the second rack 12 to move, ensuring the smooth movement of the push block 6 and the positioning plate 7. When sewing is complete, the control system sends a signal to activate the thread-cutting mechanism. As the rotating shaft 15 rotates, the protrusion 1... 3. The blade 17 slides and rotates along the guide rail 16, ultimately driving the blade 17 to cut the thread. The design of the slot 18 ensures that the blade 17 can smoothly enter and complete the thread cutting action, avoiding the tediousness and inaccuracy of manual thread cutting. The retaining post 23 is used to place the thread spool, ensuring that the thread spool will not shake or fall off during use. The limiting post 24 can accurately position the position of the thread spool, and the outward-expanding ring plate ensures that the thread spool is placed stably. The lamp tube 20 provides sufficient lighting to help the operator clearly see the work area, especially in low light conditions, ensuring accurate operation. After sewing and thread cutting are completed, the electric push rod 5 is turned off, and the positioning plate 7 releases the fabric. The operator can easily take out the finished product and proceed to the next processing step.
[0027] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by means of equivalent substitution or equivalent transformation fall within the protection scope of the present invention.
Claims
1. A CNC automatic thread trimming and overlock sewing machine, characterized in that, The machine includes a sewing machine body (1), a control panel (2), a sewing machine (3), a housing (4), an electric push rod (5), a push block (6), a positioning plate (7), an anti-slip table (8), a first rack (9), a bracket (10), a gear (11), a second rack (12), a protrusion (13), a mounting block (14), a rotating shaft (15), a guide rail plate (16), and a blade (17). The control panel (2) is located on one side of the upper part of the sewing machine body (1). A sewing machine (3) is installed on the bottom edge of the other side. A shell (4) is provided on the side wall of the middle part of the overlock sewing machine body (1). An electric push rod (5) is installed on the upper side of the overlock sewing machine body (1). A push block (6) is provided on the drive of the electric push rod (5). A positioning plate (7) is provided on one side of the push block (6). An anti-slip table (8) is embedded in the operating table below the overlock sewing machine body (1). A first toothed rack (9) is provided on one side of the rear part of the push block (6). A bracket is provided on one side of the upper part of the shell (4). (10) A gear (11) is rotatably mounted in the middle of the bracket (10). A second rack (12) that meshes with the gear (11) is slidably mounted on one side inside the bracket (10). One side of the first rack (9) also slides inside the bracket (10) and meshes with the gear (11). The outer shell (4) covers the push block (6) and its components. A protrusion (13) is provided on the lower side of the outer shell (12). A mounting block is provided on the upper part of the outer shell (4) behind the protrusion (13). (14) A rotating shaft (15) is rotatably installed inside the mounting block (14). A guide rail plate (16) is provided on one side of the rotating shaft (15). The guide rail of the guide rail plate (16) is sleeved on the outside of the protrusion (13). The protrusion (13) slides and rotates in the guide rail of the guide rail plate (16). A blade (17) is provided on the other side of the rotating shaft (15). A slot (18) is opened on the anti-slip table (8) and the operating table of the overlock sewing machine body (1). The blade (17) is above the slot (18).
2. The CNC automatic thread trimming and overlock sewing machine according to claim 1, characterized in that, It also includes a fixing block (19), a lamp tube (20) and a lamp cover (21). The fixing block (19) is provided on the bottom surface of the upper part of the overlock sewing machine body (1). The lamp tube (20) is fitted on the fixing block (19), and the lamp cover (21) is fitted on the outside of the lamp tube (20).
3. The CNC automatic thread trimming and overlock sewing machine according to claim 2, characterized in that, It also includes an installation plate (22) and a locking post (23). The installation plate (22) is provided on the upper front side of the main body of the overlock sewing machine, and multiple locking posts (23) are provided at equal intervals on the installation plate (22).
4. A CNC automatic thread trimming and overlock sewing machine according to claim 3, characterized in that, It also includes a limiting post (24) and a magnet (25). The limiting post (24) is slidably arranged inside the locking post (23), and the magnet (25) is arranged between the limiting post (24) and the locking post (23) to attract each other.
5. A CNC automatic thread trimming and overlock sewing machine according to claim 4, characterized in that, The control panel (2) is electrically connected to the sewing machine (3) and the electric push rod (5).
6. A CNC automatic thread trimming and overlock sewing machine according to claim 5, characterized in that, The end of the limiting post (24) is provided with an outwardly expanding ring plate.