12-needle automatic thread trimming device

Abstract

The utility model relates to a 12-needle automatic thread trimming device which comprises a mounting plate, a fixed blade, a thread clamping assembly and a movable knife assembly, the fixed blade is fixedly mounted on one side of the mounting plate, the movable knife assembly comprises a movable knife rest and a plurality of thread hooking knives, the movable knife rest is slidably mounted on the mounting plate, and the thread hooking knives are opposite to the cutting edge of the fixed blade. A left movable arm and a right movable arm are arranged on the two sides of the movable tool rest respectively, the mounting plate comprises a bottom plate, a left extension plate and a right extension plate, the left extension plate and the right extension plate are arranged on the left side and the right side of the bottom plate respectively, a detachable left check block is arranged on one side of the left extension plate, and a first pushing area for the left movable arm to move is formed between the left check block and the bottom plate. The utility model aims to provide the 12-needle automatic thread trimming device, and the 12-needle automatic thread trimming device solves the technical problems that a whole mounting plate needs to be replaced after a baffle of an existing automatic thread trimming device is damaged or broken, and the stability is poor due to the fact that the covering and limiting area of a pressing plate is small in the sliding process of a sliding plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing machine accessories, in particular to a 12-needle automatic thread trimmer. Background Art

[0002] Nowadays, most garment factories use automated sewing machines for tailoring. Such automated sewing machine equipment generally has an automatic thread trimming device, which consists of a mounting plate and a movable blade and a fixed blade fixed to the mounting plate to achieve thread trimming operations. For example, the Chinese utility model patent with patent number CN202222679257.7, entitled A 13-needle automatic thread trimming device, discloses that "the front edges of the left extension plate and the right extension plate are respectively fixed to the left stopper and the right stopper to limit the left and right slide plates in the left and right directions; the front edges of the left extension plate and the right extension plate are respectively fixed to the left pressure plate and the right pressure plate, which respectively abut against the upper surfaces of the left and right slide plates to limit the left and right slide plates in the up and down directions."

[0003] In the above patent, since the left stopper and the right stopper are fixed to the front edges of the left extension plate and the right extension plate, they cannot be disassembled and replaced. The left and right slide plates in the wire trimmer device often contact and rub against the left and right stoppers when sliding. After long-term use, the left and right stoppers will wear out and be damaged. In addition, since the baffles generally cover a long area and are too fragile, they are prone to breakage during practical use. Once the left and right stoppers are broken or damaged, the entire wire trimmer device cannot be used normally, and needs to be replaced as a whole, which is not only troublesome but also costly.

[0004] Moreover, the pressure plate in the prior art usually covers a small area of ​​limitation. For example, the right pressure plate in the patent does not cross the mounting groove on the right extension plate, so the distance it restricts the sliding of the skateboard is relatively limited, resulting in poor stability of the skateboard during the activity. Utility Model Content

[0005] The purpose of the utility model is to provide a 12-needle automatic thread trimming device to solve the technical problems of the existing automatic thread trimming device, which is not only troublesome and costly to replace the entire mounting plate after the baffle is damaged or broken, and the poor stability of the slide during the sliding process due to the small area of ​​the pressure plate covering the limit.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a 12-needle automatic thread trimming device, including a mounting plate, a fixed blade, a thread clamping assembly and a movable knife assembly, the fixed blade is fixedly mounted on one side of the mounting plate, the movable knife assembly includes a movable knife holder slidably mounted on the mounting plate and a plurality of thread hooking knives, the thread hooking knives are opposite to the blades of the fixed blade, the movable knife holder has a left movable arm and a right movable arm on both sides respectively, the mounting plate includes a base plate and a left extension plate and a right extension plate respectively arranged on the left and right sides of the base plate, a detachable left stopper is provided on one side of the left extension plate, a first pushing area for the left movable arm to move is formed between the left stopper and the base plate, and the stopper abuts against one side of the left movable arm.

[0007] Furthermore, a detachable right stopper is provided on one side of the right extension plate, a second pushing area for the right movable arm to move is formed between the right stopper and the bottom plate, a mounting groove is provided on the right extension plate, and the right stopper covers the upper opening of the mounting groove.

[0008] Furthermore, a right pressure block is installed on the right stop block, one side of the right pressure block extends to the upper end of the second pushing area, and a right sliding groove matching the right movable arm is formed between the right stop block, the right extension plate and the right pressure block.

[0009] Furthermore, a first left pressure block is installed on the left stop block, one side of the first left pressure block extends into the first pushing area, and a first left sliding groove is formed between the left stop block, the left extension plate and the first left pressure block.

[0010] Furthermore, it also includes a second left pressure block, and a slot for installing the second left pressure block is provided on the side of the base plate close to the left extension plate, and a second left sliding slot is formed between the second left pressure block and the left extension plate. The second left pressure block and the first left pressure block are in the same horizontal plane, and the lower bottom surfaces of the first left pressure block and the second left pressure block are both in contact with the upper surface of the left movable arm.

[0011] Furthermore, a blocking portion is integrally formed on one side of the right extension plate, and a second pushing area for the right movable arm to move is formed between the blocking portion and the bottom plate. A mounting groove that passes through the right extension plate is provided on the blocking portion, and a right pressure block is provided on the blocking portion. The right pressure block extends over the upper end opening of the mounting groove and covers it, and one side of the right pressure block extends to the upper end of the second pushing area, and a right sliding slot is formed between the right blocking block, the right extension plate and the right pressure block.

[0012] Furthermore, the left extension plate and the right extension plate are respectively provided with a first cylinder and a second cylinder for driving the sliding knife assembly to move, and the pushing ends of the first cylinder and the second cylinder are connected to the left movable arm and the right movable arm at both ends of the movable knife holder.

[0013] Furthermore, both sides of the movable knife holder are recessed inward to form positioning notches, and the movable knife holder is provided with 12 line-hooking knives.

[0014] Furthermore, the wire clamping assembly includes a thickened connecting arm fixedly mounted on the top of the mounting plate and a plurality of pressing plates and wire clamping plates fixed in sequence on the lower surface of the thickened connecting arm. The positions of the pressing plates, wire clamping plates and wire hooking knives correspond one to one. The movable knife holder has a mounting portion for installing the wire hooking knife and the deflocculation plate. The deflocculation plate is located between the wire hooking knife and the wire clamping plate and abuts against the two. The pressing plate and the wire clamping plate abut against each other.

[0015] Furthermore, the mounting plate is an aluminum plate, and the left stopper and the right stopper are iron stoppers.

[0016] Through the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0017] When the block needs to be installed, it is only necessary to align the through holes on the block with the fixing screw holes on the mounting position and then screw the positioning bolts to make the block detachable and mounted on the extension plate. When it needs to be disassembled, it is only necessary to unscrew the positioning bolts. In this way, the block can be disassembled and assembled, and the block is generally made of iron, which has high strength and is not easy to break. This solves the problem that the baffles on the existing extension plate all adopt an integrated fixing method and cannot be disassembled and replaced. As a result, after long-term use, when the left block and the right block are damaged or broken, the entire mounting plate needs to be replaced, which is not only troublesome but also costly.

[0018] 2. By arranging a pressure plate on the stop block, and the pressure plate is extended in the horizontal direction of the stop block, the area covered is larger. When the left movable arm and the right movable arm on both sides of the movable tool holder are located in the first pushing area and the second pushing area, the left stop block and the right stop block on the left extension plate are used to limit the left movable arm and the right movable arm in the left and right directions, and the left pressure block and the right pressure block respectively abut against the upper surfaces of the left movable arm and the right movable arm to limit the left movable arm and the right movable arm in the up and down directions. By arranging a pressure plate with a wider coverage range, the contact area between the pressure plate and the movable arm can be increased, so that the movable arm can be more firmly installed in the pushing area and is not easily deviated during the sliding process, thereby increasing the stability of the product.

[0019] Through the above method, the technical problems of the existing automatic thread trimming device, such as the need to replace the entire mounting plate after the baffle is damaged or broken, which is not only troublesome and costly, but also the poor stability of the slide during the sliding process due to the small area of ​​the pressure plate covering the limit, are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 This is a front structural diagram of the first embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the back structure of the first embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the bottom plate structure of the present utility model;

[0024] Figure 4 This is a structural diagram of the left stopper in the utility model in an assembled state;

[0025] Figure 5 This is a structural diagram of the right stopper in the utility model in an assembled state;

[0026] Figure 6 This is a schematic structural diagram of the second embodiment of the present utility model;

[0027] The utility model number information is as follows:

[0028] 1. Mounting plate; 2. Fixed blade; 3. Movable blade holder; 4. Thread-hooking knife; 5. Left stopper; 6. Right stopper; 7. Mounting slot; 8. Right pressure block; 9. First left pressure block; 10. Second left pressure block; 11. First cylinder; 12. Second cylinder; 13. Positioning notch; 14. Thickened connecting arm; 15. Pressure plate; 16. Thread clamp; 101. Bottom plate; 102. Left extension plate; 103. Right extension plate; 104. First push area; 105. Second push area; 106. Blocking portion; 301. Left movable arm; 302. Right movable arm

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following is a combination of the appended examples of the present invention Figure 1-3The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0033] like Figure 1-5 The figure shows the first embodiment of the present utility model: a 12-needle automatic thread trimming device, comprising a mounting plate 1, a fixed blade 2, a thread clamping assembly and a movable knife assembly, the fixed blade 2 is fixedly mounted on one side of the mounting plate 1, the movable knife assembly comprises a movable knife holder 3 slidably mounted on the mounting plate 1 and a plurality of thread hooking knives 4, the thread hooking knife 4 has a hollow groove, the thread hooking knife 4 is opposite to the blade of the fixed blade 2, and a left movable arm 301 and a right movable arm 302 are respectively provided on both sides of the movable knife holder 3, the mounting plate 1 comprises a base plate 101 and a left extension plate 102 and a right extension plate 103 respectively arranged on the left and right sides of the base plate 101, a detachable left stopper 5 is provided on one side of the left extension plate 102, a first pushing area 104 for the left movable arm 301 to move is formed between the left stopper 5 and the base plate 101, and the stopper 5 abuts against one side of the left movable arm 301, the mounting plate 1 is an aluminum plate, and the left stopper 5 and the right stopper 6 are iron stops.

[0034] In this embodiment, the overall width of the mounting plate 1 is relatively small, the base plate 101 is a U-shaped plate, the left extension plate 102 and the right extension plate 103 are integrally formed on both sides of the base plate 101, and the upper surfaces of the left extension plate 102 and the right extension plate 103 are lower than the upper surface of the base plate 101. When the left extension plate 102 is installed with the left stopper 5, the edge of the left stopper 5 and one side of the base plate 101 forms a first pushing area 104 for the left movable arm 301 to slide up and down, and a number of circular mounting grooves for fixing the mounting plate 1 are provided on the back of the base plate 101.

[0035] Both ends of the U-shaped opening of the bottom plate 101 have positioning ends for installing the fixed blade 2. The two sides of the fixed blade 2 are fixed to the positioning ends by threaded connections. The movable blade holder 3 is a U-shaped plate and is integrally formed with the left movable arm 301 and the right movable arm 302 on both sides. The movable blade holder 3 is arranged above the fixed blade 2, and the left movable arm 301 and the right movable arm 302 on both sides are slidably arranged in the pushing area on the left extension plate 102 and the right extension plate 103, and are limited up, down, left and right by blocks and pressure plates.

[0036] like Figure 5 As shown: a detachable right stopper 6 is provided on one side of the right extension plate 103, and a second pushing area 105 for the right movable arm 302 to move is formed between the right stopper 6 and the bottom plate 101. A mounting groove 7 is provided on the right extension plate 103, and the mounting groove 7 is used to fix the mounting plate 1. The right stopper 6 covers the upper opening of the mounting groove 7 to increase the length of the right stopper 6 and increase the stability of the movable arm. The right stopper 6 is fixed to the right extension plate 103 by a threaded connection.

[0037] like Figure 1-5 As shown: the right block 6 is mounted with a right pressing block 8, one side of which extends to the upper end of the second pushing area 105, and a right sliding notch matching the right movable arm 302 is formed between the right block 6, the right extension plate 103 and the right pressing block 8, and the right pressing block 8 is connected to the right block 6 by a thread. Figure 1-3 As shown: a first left pressure block 9 is installed on the left stop block 5, one side of the first left pressure block 9 extends into the first pushing area 104, and a first left sliding groove is formed between the left stop block 5, the left extension plate 102 and the first left pressure block 9.

[0038] like Figure 1-2As shown: it also includes a second left pressure block 10, and a slot for installing the second left pressure block 10 is provided on one side of the bottom plate 101 close to the left extension plate 102, and the second left pressure block 10 is installed in the slot by a threaded connection, and a second left sliding slot is formed between the second left pressure block 10 and the left extension plate 102, the second left pressure block 10 and the first left pressure block 9 are in the same horizontal plane, and the lower bottom surfaces of the first left pressure block 9 and the second left pressure block 10 are both in contact with the upper surface of the left movable arm 301, and by arranging the relative first left pressure block 9 and the second left pressure block 10, both sides of the upper surface of the left movable arm 301 can be in contact, thereby improving stability.

[0039] The left movable arm 301 and the right movable arm 302 can be slid more stably in the pushing area through the cooperation of the right sliding slot, the first left sliding slot and the first left sliding slot. Figure 1-2 As shown: the left extension plate 102 and the right extension plate 103 are respectively provided with a first cylinder 11 and a second cylinder 12 for driving the movement of the sliding knife assembly. The pushing ends of the first cylinder 11 and the second cylinder 12 are connected to the left movable arm 301 and the right movable arm 302 at both ends of the movable knife holder 3. The left movable arm 301 and the right movable arm 302 are both provided with connecting ends at one end away from the movable knife holder 3. The pushing ends of the first cylinder 11 and the second cylinder 12 are clamped into the connecting ends and locked with screws, so that the first cylinder 11 and the second cylinder 12 are respectively fixedly connected to the left movable arm 301 and the right movable arm 302. The first cylinder 11 and the second cylinder 12 are fixed to the left extension plate 102 and the right extension plate 103 by bolts, and the bottom plate 101 is provided with slots for installing the positioning parts on one side of the first cylinder 11 and the second cylinder 12. As shown Figure 1 As shown: the two sides of the movable knife holder 3 are recessed to form positioning notches 13, which are provided for easy installation. The movable knife holder 3 is provided with 12 hooking knives 4. Figure 1-3 As shown: the wire clamping assembly includes a thickened connecting arm 14 fixedly mounted on the top of the mounting plate 1 and a plurality of pressing plates 15 and wire clamping plates 16 fixed in sequence on the lower surface of the thickened connecting arm 14. The positions of the pressing plates 15 and wire clamping plates 16 correspond one to one with the positions of the wire hooking knife 4. The movable knife holder 3 has a mounting portion for installing the wire hooking knife 4 and the de-flocculation plate. The de-flocculation plate is located between the wire hooking knife 4 and the wire clamping plate 16 and abuts against the two. The pressing plate 15 and the wire clamping plate 16 abut against each other. Since the traditional connecting arm 14 is relatively thin, the use of a thickened connecting arm 14 can increase the strength of the connecting arm, making it less likely to break.

[0040] The thickened connecting arm 14 is located on the outside of the movable tool holder 3, and the wire hooking knife 4 is installed in the connecting groove on the movable tool holder 3 by means of screw positioning. The pressing plate 15 and the wire clamping plate 16 are also detachably arranged on the lower surface of the thickened connecting arm 14 by means of screw positioning.

[0041] like Figure 6The second embodiment of the present utility model is shown: a 12-needle automatic thread trimming device, comprising a mounting plate 1, a fixed blade 2, a thread clamping assembly and a movable knife assembly, the fixed blade 2 is fixedly mounted on one side of the mounting plate 1, the movable knife assembly comprises a movable knife holder 3 slidably mounted on the mounting plate 1 and a plurality of thread hooking knives 4, the thread hooking knives 4 are opposite to the blades of the fixed blade 2, and the movable knife holder 3 has a left movable arm 301 and a right movable arm 302 on both sides, the mounting plate 1 comprises a base plate 101 and a left extension plate 102 and a right extension plate 103 respectively arranged on the left and right sides of the base plate 101, a detachable left stopper 5 is provided on one side of the left extension plate 102, a first pushing area 104 for the left movable arm 301 to move is formed between the left stopper 5 and the base plate 101, and the left stopper 5 abuts against one side of the left movable arm 301. A blocking portion 106 is integrally formed on one side of the right extension plate 103, and a second pushing area 105 for the right movable arm 302 to move is formed between the blocking portion 106 and the base plate 101. A mounting groove 7 that passes through the right extension plate 103 is provided on the blocking portion 106, and a right pressure block 8 is provided on the blocking portion 106. The right pressure block 8 extends through the upper end opening of the mounting groove 7 and covers it. One side of the right pressure block 8 extends to the upper end of the second pushing area 105, and a right sliding groove is formed between the right stopper 6, the right extension plate 103 and the right pressure block 8.

[0042] In this embodiment, a detachable left stopper 5 is provided on the left extension plate 102, and a blocking portion 106 is integrally formed on the right extension plate 103, and a right pressure block 8 of the transverse frame mounting groove 7 is provided on the blocking portion 106 to increase the coverage area of ​​the right pressure block 8, thereby increasing stability, and the overall production cost of the form with a left stopper 5 on one side and a blocking portion 106 on the other side is lower.

[0043] In summary, the present invention has the following beneficial effects: by arranging detachable left stopper 5 and right stopper 6 on the left extension plate 102 and / or the right extension plate 103 on the left and right sides of the bottom plate 101, specifically, the left extension plate 102 and the right extension plate 103 are provided with mounting positions for the left stopper 5 and the right stopper 6 to be disassembled and fixed, the mounting positions and the first pushing area 104 are in the same plane, the mounting positions have fixing screw holes at both ends, and the stopper is provided with through holes corresponding to the fixing screw holes. When the stopper needs to be installed, it is only necessary to align the through holes on it with the fixing screw holes. The block can be detachably installed on the extension plate by screwing on the fixing screw holes on the quasi-installation position and then tightening the positioning bolts. When it needs to be disassembled, it is only necessary to unscrew the positioning bolts. Through the above method, the block can be disassembled and assembled, and the block is generally made of iron, which has high strength and is not easy to break. This solves the problem that the baffles on the existing extension plate are all fixed in an integrated manner and cannot be disassembled and replaced. As a result, after long-term use, when the left and right blocks are displaced or broken, the entire mounting plate needs to be replaced, which is not only troublesome but also costly.

[0044] By arranging a pressure plate on the stop block, and the pressure plate is extended in the horizontal direction of the stop block, the area covered is larger. When the left movable arm 301 and the right movable arm 302 on both sides of the movable tool holder 3 are located in the first pushing area 104 and the second pushing area 105, the left stop block 5 and the right stop block 6 on the left extension plate 102 and the right extension plate 103 are used to limit the left movable arm 301 and the right movable arm 302 in the left and right directions. The left pressure block and the right pressure block respectively abut against the upper surfaces of the left movable arm 301 and the right movable arm 302 to limit the left movable arm 301 and the right movable arm 302 in the up and down directions. By arranging a pressure plate with a wider coverage range, the contact area between the pressure plate and the movable arm can be increased, so that the movable arm can be more firmly installed in the pushing area and is not easily displaced during the sliding process, thereby increasing the stability of the product.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A 12-needle automatic thread trimming device, comprising a mounting plate (1), a fixed blade (2), a thread clamping assembly and a movable knife assembly, wherein the fixed blade (2) is fixedly mounted on one side of the mounting plate (1), and the movable knife assembly comprises a movable knife holder (3) slidably mounted on the mounting plate (1) and a plurality of thread hooking knives (4), wherein the thread hooking knives (4) are opposite to the blades of the fixed blade (2), and is characterized in that: The movable tool holder (3) has a left movable arm (301) and a right movable arm (302) on both sides, respectively; the mounting plate (1) comprises a base plate (101) and a left extension plate (102) and a right extension plate (103) respectively arranged on the left and right sides of the base plate (101); a detachable left stopper (5) is provided on one side of the left extension plate (102); a first pushing area (104) for the left movable arm (301) to move is formed between the left stopper (5) and the base plate (101), and the left stopper (5) abuts against one side of the left movable arm (301).

2. The 12-needle automatic thread trimming device according to claim 1, characterized in that: A detachable right stopper (6) is provided on one side of the right extension plate (103); a second pushing area (105) for the right movable arm (302) to move is formed between the right stopper (6) and the bottom plate (101); a mounting groove (7) is provided on the right extension plate (103); and the right stopper (6) covers the upper opening of the mounting groove (7).

3. The 12-needle automatic thread trimming device according to claim 2, characterized in that: A right pressure block (8) is mounted on the right stop block (6), one side of the right pressure block (8) extends to the upper end of the second pushing area (105), and a right sliding notch matching the right movable arm (302) is formed between the right stop block (6), the right extension plate (103) and the right pressure block (8).

4. The 12-needle automatic thread trimming device according to claim 1, characterized in that: A first left pressure block (9) is mounted on the left stop block (5), one side of the first left pressure block (9) extends into the first pushing area (104), and a first left sliding notch is formed between the left stop block (5), the left extension plate (102) and the first left pressure block (9).

5. The 12-needle automatic thread trimming device according to claim 4, characterized in that: The invention also includes a second left pressure block (10), a slot for installing the second left pressure block (10) is provided on one side of the bottom plate (101) close to the left extension plate (102), a second left sliding slot is formed between the second left pressure block (10) and the left extension plate (102), the second left pressure block (10) and the first left pressure block (9) are in the same horizontal plane, and the lower bottom surfaces of the first left pressure block (9) and the second left pressure block (10) are both in contact with the upper surface of the left movable arm (301).

6. The 12-needle automatic thread trimming device according to claim 2, characterized in that: A blocking portion (106) is integrally formed on one side of the right extension plate (103), and a second pushing area (105) for the right movable arm (302) to move is formed between the blocking portion (106) and the bottom plate (101). A mounting groove (7) penetrating the right extension plate (103) is provided on the blocking portion (106). A right pressing block (8) is provided on the blocking portion (106), and the right pressing block (8) extends through the upper end opening of the mounting groove (7) and covers it. One side of the right pressing block (8) extends to the upper end of the second pushing area (105), and a right sliding notch is formed between the right blocking block (6), the right extension plate (103) and the right pressing block (8).

7. A 12-needle automatic thread trimming device according to any one of claims 1 to 6, characterized in that: The left extension plate (102) and the right extension plate (103) are respectively provided with a first cylinder (11) and a second cylinder (12) for driving the sliding knife assembly to move, and the pushing ends of the first cylinder (11) and the second cylinder (12) are connected to the left movable arm (301) and the right movable arm (302) at both ends of the movable knife holder (3).

8. The 12-needle automatic thread trimming device according to claim 7, characterized in that: Both sides of the movable knife frame (3) are inwardly recessed to form positioning notches (13), and the movable knife frame (3) is provided with 12 line-drawing knives (4).

9. The 12-needle automatic thread trimming device according to claim 8, characterized in that: The wire clamping assembly comprises a thickened connecting arm (14) fixedly mounted on the top of the mounting plate (1) and a plurality of pressing plates (15) and wire clamping plates (16) fixedly mounted on the lower surface of the thickened connecting arm (14) in sequence. The pressing plates (15) and wire clamping plates (16) correspond to the positions of the wire hooking knife (4) in a one-to-one manner. The movable knife frame (3) is provided with a mounting portion for mounting the wire hooking knife (4) and a de-flocculation plate. The de-flocculation plate is located between the wire hooking knife (4) and the wire clamping plates (16) and abuts against the two. The pressing plates (15) and the wire clamping plates (16) abut against each other.

10. The 12-needle automatic thread trimming device according to claim 1, characterized in that: The mounting plate (1) is an aluminum plate, and the left stopper (5) and the right stopper (6) are iron stoppers.

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