Cutting mechanism of placket machine

Abstract

The utility model discloses a cutting mechanism of a top fly machine, which relates to the technical field of top fly machines and comprises a support beam fixedly arranged above a workbench. The first cutting driving assembly is connected to the supporting cross beam; the linear cutting knife is connected to the first cutting driving assembly, and the first cutting driving assembly can drive the linear cutting knife to vertically ascend and descend; the second cutting driving assembly is connected to the supporting cross beam; the angle knife is in an angle shape and is connected to the second cutting driving assembly, and the second cutting driving assembly can drive the angle knife to vertically ascend and descend; a base plate is arranged on the workbench and used for being arranged below cloth in a cushioned mode. And a linear avoiding groove corresponding to the linear cutting knife and an angular avoiding groove corresponding to the angular knife are formed in the base plate. Abrasion of the blade and the base plate can be reduced, and the cutting quality of front fly kerfs is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of placket machines, and in particular to a cutting mechanism for a placket machine. Background Technology

[0002] Clothing has plackets at the neckline, trouser hem, or other openings or slits. To make a placket, a seam line is sewn around the fabric, and then a Y-shaped slit is cut into the fabric within the sewn seam line using a cutter.

[0003] Traditional methods involve manual cutting of the placket, resulting in low processing efficiency and inconsistent quality. Some placket machines utilize a cutting mechanism that moves up and down to automatically cut seams on the fabric. This mechanism includes a straight cutting blade and a V-shaped corner blade. The straight cutting blade cuts the center line, while the corner blade cuts a V-shaped slit at the end of the center line, thus creating a Y-shaped slit. The placket machine's worktable is equipped with a plastic pad corresponding to the cutting mechanism, supporting the fabric so that it can be cut as the blade moves downwards.

[0004] In the above solution, after repeated cutting by the cutting mechanism, the blade and the plastic pad are prone to wear, resulting in a decrease in blade sharpness and affecting the cutting smoothness. The blade can easily carve grooves into the plastic pad, making it impossible for the blade to cut elastic fabric within the original blade stroke, thus affecting the normal operation of the placket machine. Utility Model Content

[0005] The purpose of this invention is to provide a cutting mechanism for a placket cutting machine that can reduce the wear of the blade and the pad, and ensure the cutting quality of the placket seam.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] This utility model provides a cutting mechanism for a placket sewing machine, the placket sewing machine having a worktable for placing fabric; the cutting mechanism includes:

[0008] A support beam is fixedly installed above the workbench;

[0009] A first cutting drive assembly is connected to the support beam;

[0010] A straight cutting blade, the straight cutting blade being connected to the first cutting drive assembly, the first cutting drive assembly being capable of driving the straight cutting blade to move vertically up and down;

[0011] A second cutting drive assembly is connected to the support beam;

[0012] An angled blade, which is angular in shape, is connected to a second cutting drive assembly, which is capable of driving the angled blade to move vertically up and down.

[0013] The workbench is equipped with a pad for placing under the fabric; the pad has a straight clearance groove corresponding to the straight cutting blade and an angle clearance groove corresponding to the corner blade.

[0014] Furthermore, the supporting beam is fixedly connected to a cutting base; the cutting base is provided with a vertically extending first slide rail, the straight cutting blade is connected to a first slide block, the first slide block is connected to the first cutting drive assembly, and the first slide block is provided with a first slider that slides and cooperates with the first slide rail.

[0015] Furthermore, the first cutting drive assembly includes a rotary motor and a curved arm. The rotary motor is fixed to the cutting base, and the curved arm is eccentrically and rotatably connected to the rotating shaft of the rotary motor. The end of the curved arm away from the rotary motor is rotatably connected to the first slide block.

[0016] Furthermore, the second cutting drive assembly includes a vertical cutting cylinder and a corner blade holder. The cylinder body of the vertical cutting cylinder is fixed to the cutting base, the piston rod of the vertical cutting cylinder is connected to the corner blade holder, and the corner blade is fixedly disposed on the lower side of the corner blade holder.

[0017] Furthermore, the cutting base is provided with a vertically extending second slide rail, the corner cutter holder is connected to a second slide block, and the second slide block is provided with a second slider that slides and cooperates with the second slide rail.

[0018] Furthermore, the corner cutter includes a first blade and a second blade, with the opposite sides of the first blade and the second blade being closely adjacent to each other, and the first blade and the second blade being set at an angle; the angle between the first blade and the second blade is adjustable.

[0019] Furthermore, the first blade is fixedly connected to a first connecting block, the angled blade holder has an arc-shaped first connecting hole, the first connecting block has a first threaded hole aligned with the first connecting hole, and the first threaded hole is fitted with a connecting bolt passing through the first connecting hole; and / or, the second blade is fixedly connected to a second connecting block, the angled blade holder has an arc-shaped second connecting hole, the second connecting block has a second threaded hole aligned with the second connecting hole, and the second threaded hole is fitted with a connecting bolt passing through the second connecting hole.

[0020] Furthermore, both the first blade and the second blade are pointed in a shape that gradually tapers from top to bottom, and the tip angle of both the first blade and the second blade is ≤40°.

[0021] Furthermore, the workbench is provided with a mounting groove that is adapted to the pad, and the pad is detachably installed in the mounting groove.

[0022] Furthermore, the pad includes an outer plate and an inner plate, the outer plate has a groove in the middle, and the inner plate is detachably embedded in the groove; the straight clearance groove is formed in the outer plate, and the angular clearance groove is formed in the inner plate.

[0023] In summary, this utility model has the following beneficial effects:

[0024] 1. In the cutting mechanism of the placket machine of this utility model, the first cutting drive assembly and the second cutting drive assembly are connected to the support beam above the worktable. The first cutting drive assembly and the second cutting drive assembly drive the straight cutting blade and the corner blade vertically up and down, respectively, to cut straight center line slits and corner slits on the fabric on the worktable, thereby completing the Y-shaped slit cutting. A pad is provided on the worktable. When cutting the fabric, the pad supports the fabric from below, so that the straight cutting blade and the corner blade can cut the fabric. The pad has a straight clearance groove corresponding to the straight cutting blade and a corner clearance groove corresponding to the corner blade. When cutting the fabric, the straight cutting blade and the corner blade insert into the straight clearance groove and the corner clearance groove respectively, which not only ensures that the fabric is cut, but also avoids the straight cutting blade and the corner blade colliding with the pad, causing wear on the straight cutting blade, the corner blade, and the pad, thus ensuring the cutting quality of the placket slit.

[0025] 2. A cutting base is fixedly installed on the support beam. The first slide block and the first slide rail on the cutting base slide together to make the vertical movement of the straight cutting blade more stable and smooth.

[0026] 3. The first cutting drive component drives the crank arm to rotate eccentrically via a rotating motor, thereby causing the other end of the crank arm to drive the cutting base to move vertically back and forth, thus driving the straight cutting blade to move vertically back and forth rapidly to meet the cutting requirements of straight kerf.

[0027] 4. A vertical cutting cylinder is installed on the cutting base. The piston rod of the vertical cutting cylinder drives the corner knife holder and the corner knife to move vertically up and down, so as to cut an angled slit in the fabric.

[0028] 5. The second slide block slides and engages with the second slide rail on the cutting base, making the vertical movement of the corner knife holder and the corner knife connected to the second slide block more stable and smooth.

[0029] 6. The corner cutter includes a first blade and a second blade that are adjacent to each other on one side. The first blade and the second blade are set at an angle to make the corner cutter angled, which meets the cutting requirements of the V-shaped cut at the end of the Y-shaped cut. The angle between the first blade and the second blade is adjustable, so the cutting width of the corner cutter can be adjusted by adjusting the angle between the first blade and the second blade to meet the cutting requirements of different width plackets and improve the applicability of the cutting mechanism.

[0030] 7. The first blade of the corner cutter is connected to the corner cutter holder via the first connecting block, and the second blade is connected to the corner cutter holder via the second connecting block. The first connecting block and the corner cutter holder are connected by a connecting bolt passing through the first threaded hole and the arc-shaped first connecting hole. By adjusting the position of the connecting bolt in the first connecting hole, the included angle between the first blade and the second blade can be adjusted, thereby adjusting the angle of the corner cutter and changing the cutting width of the corner cutter to meet the processing requirements of different flaps.

[0031] 8. Both the first and second blades are pointed and gradually narrow from top to bottom, so that the lower end of the corner blade forms a sharp angle; the tip angle of both the first and second blades is ≤40° to ensure the sharpness of the lower end of the corner blade, so that the corner blade can concentrate stress to cut the fabric.

[0032] 9. The pad is installed in the mounting groove and does not protrude from the worktable, which helps to improve the accuracy of the placket cutting; the pad is detachable, so that the pad can be replaced after it wears out, or the pad with different straight clearance grooves and corner clearance grooves can be replaced to adapt to different straight cutting blades and corner blades.

[0033] 10. The pad consists of an outer plate and an inner plate. The inner plate is detachably installed in the groove in the middle of the outer plate. Therefore, after the angle of the corner cutter is adjusted, only the corresponding inner plate needs to be replaced, saving the replacement cost of the pad. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural schematic diagram of the cutting mechanism of a placket machine according to an embodiment of the present invention.

[0035] Figure 2 This is a three-dimensional structural diagram of the cutting mechanism and workbench according to an embodiment of the present invention.

[0036] Figure 3 This is a three-dimensional structural diagram of the pad according to an embodiment of the present invention.

[0037] Figure 4 This is an exploded structural diagram of the pad and workbench according to an embodiment of the present invention.

[0038] Figure 5 This is a three-dimensional structural diagram of the cutting mechanism according to an embodiment of the present invention. Figure 1 .

[0039] Figure 6 This is a three-dimensional structural diagram of the cutting mechanism according to an embodiment of the present invention. Figure 2 .

[0040] Figure 7 This is an exploded structural diagram of the corner cutter and corner cutter holder according to an embodiment of the present invention.

[0041] In the picture:

[0042] 1000 Cutting mechanism; 100 Support beam; 110 Cutting base; 111 First slide rail; 112 Second slide rail; 200 First cutting drive assembly; 210 Rotary motor; 220 Crank arm; 300 Second cutting drive assembly; 310 Vertical cutting cylinder; 320 Angle blade holder; 321 First connecting hole; 322 Second connecting hole; 400 Straight cutting blade; 500 Angle blade; 510 First blade; 520 530. Second blade; 531. First connecting block; 540. Second connecting block; 541. Second threaded hole; 600. Pad; 610. Straight clearance groove; 620. Angular clearance groove; 630. Outer plate; 631. Embedded groove; 640. Inner plate; 700. First slide block; 710. First slider; 800. Second slide block; 810. Second slider; 900. Connecting bolt; 2000. Worktable; 2100. Mounting groove. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings.

[0044] This embodiment discloses a cutting mechanism 1000 for a placket machine, referring to... Figure 1 In this embodiment, the cutting mechanism 1000 is applicable to a placket machine. The upper surface of the placket machine has a worktable 2000 for placing fabric, and the cutting mechanism 1000 is disposed above the worktable 2000. The placket machine also has a sewing mechanism and a presser foot mechanism on the worktable 2000. The presser foot mechanism is used to press the fabric on the worktable 2000 and drag the fabric to move. The sewing mechanism is used to perform sewing operations on the fabric. The cutting mechanism 1000 is used to cut a Y-shaped placket slit in the fabric.

[0045] Furthermore, in other embodiments, the cutting mechanism 1000 can also be applied to other suitable placket machines. For example, in one embodiment, the placket machine may not include a presser foot mechanism; instead, the fabric is manually pressed and dragged by the user, or fixed to the worktable 2000, and the cutting mechanism 1000 is configured to move in a straight line. In another embodiment, a sewing mechanism may be omitted; sewing can be completed on other equipment first, and then the fabric can be moved to the placket machine for cutting.

[0046] Reference Figure 2 The cutting mechanism 1000 includes a support beam 100, a first cutting drive assembly 200, a second cutting drive assembly 300, a straight cutting blade 400, and a corner blade 500. The support beam 100 is fixedly mounted above the worktable 2000. The first cutting drive assembly 200 and the second cutting drive assembly 300 are connected to the support beam 100. The straight cutting blade 400 is connected to the cutting drive assembly, and the first cutting drive assembly 200 can drive the straight cutting blade 400 to move vertically. The corner blade 500 is connected to the second cutting drive assembly 300, and the second cutting drive assembly 300 can drive the corner blade 500 to move vertically.

[0047] In this embodiment, the straight cutting blade 400 is in a straight line shape, and the corner blade 500 is in a V-shape. The straight cutting blade 400 and the corner blade 500 are arranged at intervals in the front-to-back direction. Specifically, in this embodiment, the straight cutting blade 400 is located behind the corner blade 500, and the V-shaped angle of the corner blade 500 faces the straight cutting blade 400. Here, "front" refers to the side closer to the operator, and "rear" refers to the side away from the operator. When cutting seams on the fabric, the fabric is moved in the front-to-back direction on the worktable 200 by the presser foot mechanism or by manual dragging. The first cutting drive assembly 200 drives the straight cutting blade 400 to move vertically back and forth to cut a straight center line seam on the fabric. Then, the second cutting drive assembly 300 drives the corner blade 500 to descend, and the corner blade 500 cuts a V-shaped seam at the end of the straight seam, thereby completing the Y-shaped seam cutting.

[0048] Reference Figures 2 to 4 A pad 600 is provided on the workbench 2000. The pad 600 is placed under the fabric. When cutting the fabric, the pad 600 supports the fabric from below so that the straight cutting blade 400 and the corner blade 500 can cut the fabric.

[0049] The pad 600 has a straight clearance groove 610 corresponding to the straight cutting blade 400 and an angled clearance groove 620 corresponding to the angled blade 500. Here, "corresponding" means that the straight clearance groove 610 is aligned with the straight cutting blade 400, allowing the straight cutting blade 400 to be vertically inserted into the straight clearance groove 610, and the angled clearance groove 620 is aligned with the angled blade 500, allowing the angled blade 500 to be vertically inserted into the angled clearance groove 620. Therefore, when the straight cutting blade 400 and the angled blade 500 cut the fabric, they are inserted into the corresponding straight clearance groove 610 and angled clearance groove 620, ensuring that the cutting mechanism 1000 can cut the fabric while preventing collisions between the straight cutting blade 400 and the angled blade 500 and the pad 600, thus avoiding wear on the straight cutting blade 400, the angled blade 500, and the pad 600, and ensuring the cutting quality of the placket seam.

[0050] In this embodiment, a mounting groove 2100 is provided on the workbench 2000. The mounting groove 2100 is adapted to the pad 600, that is, the shape of the mounting groove 2100 is the same as that of the pad 600, and the pad 600 can be fitted into the mounting groove 2100.

[0051] In this embodiment, the thickness of the pad 600 is the same as the depth of the mounting groove 2100, so that after the pad 600 is installed in the mounting groove 2100, the upper surface of the pad 600 is flush with the opening of the mounting groove 2100, so that the pad 600 does not protrude from the worktable 2000, which helps to improve the accuracy of the placket cutting.

[0052] In this embodiment, the pad 600 is detachably installed in the mounting groove 2100, so that the pad 600 can be replaced after wear, or the pad 600 with different straight clearance grooves 610 and angular clearance grooves 620 can be replaced to adapt to different straight cutting blades 400 and angular blades 500.

[0053] In some embodiments, the pad 600 includes an outer plate 630 and an inner plate 640. A groove 631 is provided in the center of the outer plate 630, and the inner plate 640 is detachably fitted into the groove 631. A straight clearance groove 610 is formed in the outer plate 630, and an angled clearance groove 620 is formed in the inner plate 640. Therefore, after adjusting the angle of the corner cutter 500, only the corresponding inner plate 640 needs to be replaced, saving the replacement cost of the pad 600.

[0054] Specifically, in this embodiment, the outer plate 630 is detachably fixed to the mounting groove 2100 by screws, and the inner plate 640 is detachably fixed to the recess 631 by screws. In other embodiments, the pad 600 and the mounting groove 2100, and the inner plate 640 and the outer plate 630 may also be detachably connected by snap-fit, interference fit or other suitable means.

[0055] Reference Figure 2 In this embodiment, a cutting base 110 is fixedly connected to the supporting beam 100, and the first cutting drive assembly 200 and the second cutting drive assembly 300 are both disposed on the cutting base 110. In other embodiments, the first cutting drive assembly 200 and the second cutting drive assembly 300 may also be directly connected to the supporting beam 100.

[0056] Combination Figure 5 and Figure 6In this embodiment, the cutting base 110 is provided with a vertically extending first slide rail 111, the linear cutting blade 400 is connected to a first slide block 700, the first slide block 700 is connected to the first cutting drive assembly 200, and the first slide block 700 is provided with a first slider 710 that slides and engages with the first slide rail 111. Therefore, by sliding and engaging the first slide block 700 with the first slide rail 111 on the cutting base 110, the first cutting drive assembly 200 drives the linear cutting blade 400 to move vertically up and down more stably and smoothly.

[0057] In this embodiment, the first cutting drive assembly 200 includes a rotary motor 210 and a curved arm 220. The rotary motor 210 is fixed to the cutting base 110, and its shaft is horizontally positioned. The curved arm 220 is vertically positioned and eccentrically and rotatably connected to the shaft of the rotary motor 210. One end of the curved arm 220, away from the rotary motor 210, is rotatably connected to the first slide block 700. The rotary motor 210 drives the curved arm 220 to rotate eccentrically, thereby causing the other end of the curved arm 220 to drive the cutting base 110 to reciprocate vertically. This enables the linear cutting blade 400 to rapidly reciprocate vertically to meet the cutting requirements of a straight kerf.

[0058] Reference Figure 5 and Figure 6 The second cutting drive assembly 300 includes a vertical cutting cylinder 310 and a corner cutter holder 320. The cylinder body of the vertical cutting cylinder 310 is fixed to the cutting base 110. The piston rod of the vertical cutting cylinder 310 is vertically arranged and connected to the corner cutter holder 320. The corner cutter 500 is fixedly arranged on the lower side of the corner cutter holder 320. The piston rod of the vertical cutting cylinder 310 drives the corner cutter holder 320 and the corner cutter 500 to move vertically up and down to cut an angled slit in the fabric.

[0059] The cutting base 110 is also provided with a vertically extending second slide rail 112. The corner knife holder 320 is connected to a second slide block 800, and the second slide block 800 is provided with a second slider 810 that slides and engages with the second slide rail 112. The second slide block 800 slides and engages with the second slide rail 112 on the cutting base 110 through the second slider 810, making the vertical lifting and lowering of the corner knife holder 320 and the corner knife 500 connected to the second slide block 800 more stable and smooth.

[0060] In addition, in other embodiments, the second slide rail 112 and the second slider 810 may not be provided, and the vertical cutting cylinder 310 can directly drive the corner cutter holder 320 and the corner cutter 500 to move vertically up and down.

[0061] In other embodiments, the first cutting drive assembly 200 and the second cutting drive assembly 300 may also employ a motor screw mechanism, a gear and rack mechanism, a transmission belt mechanism, or other suitable reciprocating linear drive mechanism.

[0062] Reference Figure 7 In this embodiment, the corner cutter 500 includes a vertically extending first blade 510 and a second blade 520, with the opposite sides of the first blade 510 and the second blade 520 closely abutting each other. The first blade 510 and the second blade 520 are arranged at an angle so that the corner cutter 500 is V-shaped, which meets the cutting requirements of the V-shaped cut at the end of the Y-shaped cut.

[0063] In some embodiments, the included angle between the first blade 510 and the second blade 520 is adjustable. The cutting width of the corner knife 500 can be adjusted by adjusting the included angle between the first blade 510 and the second blade 520 to meet the cutting requirements of different widths of plackets and improve the applicability of the cutting mechanism 1000.

[0064] Specifically, in this embodiment, the upper end of the first blade 510 is fixedly connected to a first connecting block 530, the corner blade holder 320 is provided with a first connecting hole 321, the first connecting block 530 is provided with a first threaded hole 531 aligned with the first connecting hole 321, and the first threaded hole 531 is fitted with a connecting bolt 900 passing through the first connecting hole 321.

[0065] The first connecting hole 321 is an elongated arc hole, and the center of curvature of the first connecting hole 321 is located on the extension line of the side of the first blade 510 and the second blade 520 that are adjacent to each other. Therefore, by adjusting the position of the connecting bolt 900 in the first connecting hole 321, the included angle between the first blade 510 and the second blade 520 can be adjusted, thereby adjusting the angle of the corner cutter 500 and changing the cutting width of the corner cutter 500 to meet the processing requirements of different plackets.

[0066] Preferably, in some embodiments, the second blade 520 is fixedly connected to a second connecting block 540, the angle blade holder 320 has a second connecting hole 322, and the second connecting block 540 has a second threaded hole 541 aligned with the second connecting hole 322. The second threaded hole 541 is fitted with a connecting bolt 900 passing through the second connecting hole 322. The second connecting hole 322 is an elongated arc hole, and the center of curvature of the second connecting hole 322 is located on the extension line of the side of the first blade 510 and the second blade 520 that are adjacent to each other. Therefore, by adjusting the position of the connecting bolt 900 in the second connecting hole 322, the angle between the second blade 520 and the first blade 510 can be further adjusted, making the first blade 510 and the second blade 520 symmetrical.

[0067] In this embodiment, two first connecting holes 321 are provided, with different radii of curvature. Correspondingly, two first threaded holes 531 are provided, and the angle cutter holder 320 and the first connecting block 530 are connected by two connecting bolts 900. Two second connecting holes 322 are provided, with different radii of curvature. Correspondingly, two second threaded holes 541 are provided, and the angle cutter holder 320 and the second connecting block 540 are connected by two connecting bolts 900. This makes it difficult for the first connecting block 530 and the second connecting block 540 to rotate on their own after being connected to the angle cutter holder 320, ensuring the stability of the angle cutter 500 during cutting.

[0068] In addition, in other embodiments, the number of the first connecting hole 321, the first threaded hole 531, the second connecting hole 322, and the second threaded hole 541 may also be other suitable values.

[0069] In addition, in other embodiments, only one of the first connecting hole 321 and the second connecting hole 322 may be configured as an elongated arc hole, that is, only one of the first blade 510 and the second blade 520 is adjustable.

[0070] In other embodiments, the first blade 510 and the second blade 520 may also be configured to be non-adjustable.

[0071] Reference Figure 6 and Figure 7 In this embodiment, both the first blade 510 and the second blade 520 are pointed, gradually tapering from top to bottom, and the tip angle of both blades (i.e., the angle between the side of the first blade 510 and the side of the second blade 520 that is opposite to each other and the side of the first blade 510 and the second blade 520 that is in close contact with each other) is ≤40°. This results in a sharp angle at the lower end of the corner blade 500, ensuring the sharpness of the lower end of the corner blade 500 and facilitating the concentrated stress of the corner blade 500 to cut the fabric.

[0072] Furthermore, in other embodiments, the tip angles of the first blade 510 and the second blade 520 may also be other suitable values. In other embodiments, the first blade 510 and the second blade 520 may also be configured with other shapes.

[0073] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A cutting mechanism for a placket machine, characterized in that, The placket machine has a worktable (2000) for placing fabric; the cutting mechanism (1000) includes: A support beam (100) is fixedly mounted above the workbench (2000); A first cutting drive assembly (200) is connected to the support beam (100); A straight cutting blade (400) is connected to the first cutting drive assembly (200), and the first cutting drive assembly (200) can drive the straight cutting blade (400) to move vertically up and down. A second cutting drive assembly (300) is connected to the support beam (100); An angle blade (500) is angled and connected to a second cutting drive assembly (300). The second cutting drive assembly (300) can drive the angle blade (500) to move vertically up and down. The workbench (2000) is provided with a pad (600), which is used to support the fabric. The pad (600) has a straight clearance groove (610) corresponding to the straight cutting blade (400) and an angle clearance groove (620) corresponding to the corner blade (500).

2. The cutting mechanism of a placket machine as described in claim 1, characterized in that, The supporting beam (100) is fixedly connected to a cutting base (110); the cutting base (110) is provided with a vertically extending first slide rail (111); the straight cutting blade (400) is connected to a first slide block (700); the first slide block (700) is connected to the first cutting drive assembly (200); and the first slide block (700) is provided with a first slider (710) that slides and cooperates with the first slide rail (111).

3. The cutting mechanism of a placket machine as described in claim 2, characterized in that, The first cutting drive assembly (200) includes a rotary motor (210) and a curved arm (220). The rotary motor (210) is fixed to the cutting base (110), and the curved arm (220) is eccentrically and rotatably connected to the rotating shaft of the rotary motor (210). One end of the curved arm (220) away from the rotary motor (210) is rotatably connected to the first slide (700).

4. The cutting mechanism of a placket machine as described in claim 2, characterized in that, The second cutting drive assembly (300) includes a vertical cutting cylinder (310) and a corner blade holder (320). The cylinder body of the vertical cutting cylinder (310) is fixed to the cutting base (110), the piston rod of the vertical cutting cylinder (310) is connected to the corner blade holder (320), and the corner blade (500) is fixedly disposed on the lower side of the corner blade holder (320).

5. The cutting mechanism of a placket machine as described in claim 4, characterized in that, The cutting base (110) is provided with a vertically extending second slide rail (112), and the corner cutter holder (320) is connected to a second slide block (800). The second slide block (800) is provided with a second slider (810) that slides and cooperates with the second slide rail (112).

6. The cutting mechanism of a placket machine as described in claim 4, characterized in that, The corner cutter (500) includes a first blade (510) and a second blade (520), wherein the opposite sides of the first blade (510) and the second blade (520) are closely adjacent to each other, and the first blade (510) and the second blade (520) are arranged at an angle; the angle between the first blade (510) and the second blade (520) is adjustable.

7. The cutting mechanism of a placket machine as described in claim 6, characterized in that, The first blade (510) is fixedly connected to a first connecting block (530), the angle blade holder (320) has an arc-shaped first connecting hole (321), the first connecting block (530) has a first threaded hole (531) aligned with the first connecting hole (321), and the first threaded hole (531) is fitted with a connecting bolt (900) passing through the first connecting hole (321); and / or, the second blade (520) is fixedly connected to a second connecting block (540), the angle blade holder (320) has an arc-shaped second connecting hole (322), the second connecting block (540) has a second threaded hole (541) aligned with the second connecting hole (322), and the second threaded hole (541) is fitted with a connecting bolt (900) passing through the second connecting hole (322).

8. The cutting mechanism of a placket machine as described in claim 6, characterized in that, Both the first blade (510) and the second blade (520) are pointed and gradually narrow from top to bottom, and the tip angle of both the first blade (510) and the second blade (520) is ≤40°.

9. The cutting mechanism of a placket machine as described in claim 1, characterized in that, The workbench (2000) is provided with a mounting groove (2100) adapted to the pad (600), and the pad (600) is detachably installed in the mounting groove (2100).

10. The cutting mechanism of a placket machine as described in claim 1, characterized in that, The pad (600) includes an outer plate (630) and an inner plate (640). The outer plate (630) has a groove (631) in the middle, and the inner plate (640) is detachably embedded in the groove (631). The straight clearance groove (610) is formed in the outer plate (630), and the angular clearance groove (620) is formed in the inner plate (640).

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