A positive and negative circulation feeding mechanism

Abstract

The utility model discloses a positive and negative circulation feeding mechanism, include: base, knife area fixed base is located on the base, drive screw rod is erected on the base, extends along the feeding direction of die cutting knife area, is equipped with the first thread and second thread of opposite helical direction on the outer peripheral wall, first clamping part is sleeved on drive screw rod, and is screwed with first thread, including the first fixed block and the first moving block with the first clamping gap between both, and the first moving block is close to or away from the first fixed block along the thickness direction of die cutting knife area, second clamping part is sleeved on drive screw rod, and is screwed with second thread, including the second fixed block and the second moving block with the second clamping gap between both, and the second moving block is close to or away from the second fixed block along the thickness direction of die cutting knife area, drive motor is connected with drive screw rod transmission, the utility model saves the setting of height adjusting mechanism, and reduces structural complexity and manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of automated mechanical equipment technology, and in particular to a forward and reverse circulation feeding mechanism. Background Technology

[0002] Bending machines are widely used in industries such as electronics, printing, packaging, food, paper boxes, and self-adhesive label production. Their function is to bend die-cutting blades into the required shapes.

[0003] Chinese utility model patent application number 201921767285.6 discloses a bending die machine and its forward and reverse lead screw circulating feeding mechanism. It achieves clamping and conveying of the die-cutting blade by means of left and right clamping parts cooperating and setting left and right spiral threads on the conveying lead screw. Both the left and right clamping parts can be height adjusted using adjustment units. Although it has the function of clamping and fixing die-cutting blades of different heights and thicknesses, it requires the design of a relatively complex height adjustment structure, increasing the manufacturing cost of the die-cutting blade clamping structure.

[0004] Therefore, it is urgent to research and develop a forward and reverse circulation feeding mechanism to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a forward and reverse circulation feeding mechanism that clamps the bottom of the die-cutting blade belt, which is not affected by the height of the die-cutting blade belt, thus saving the need for a height adjustment mechanism and reducing structural complexity and manufacturing costs.

[0006] To achieve the above objectives, this utility model provides a forward and reverse circulation feeding mechanism, the specific implementation of which is as follows:

[0007] A forward and reverse circulation feeding mechanism, comprising:

[0008] Base;

[0009] A die-cutting blade holder is provided on the base and has a feeding gap for feeding the die-cutting blade.

[0010] The transmission lead screw is mounted on the base and extends along the feeding direction of the die-cutting blade. The outer peripheral wall is provided with a first thread and a second thread, and the helical directions of the first thread and the second thread are opposite.

[0011] A first clamping part, sleeved on a transmission lead screw and threaded to a first thread, includes a first moving block and a first fixed block. A first clamping gap is provided between the first moving block and the first fixed block. The first moving block moves along the thickness direction of the die-cutting strip, clamping the bottom of the die-cutting strip near or away from the first fixed block to release the die-cutting strip; and

[0012] The second clamping part is sleeved on the transmission screw and screwed to the second thread. It includes a second moving block and a second fixed block. A second clamping gap is provided between the second moving block and the second fixed block. The second moving block moves along the thickness direction of the die-cutting strip to approach the bottom of the die-cutting strip from the second fixed block or moves away from the second fixed block to release the die-cutting strip.

[0013] A drive motor is connected to a transmission screw, which drives the transmission screw to rotate, causing the first clamping part and the clamping part to move closer to each other or further apart along the axial direction of the transmission screw.

[0014] This utility model discloses a forward and reverse circulation feeding mechanism. Compared with the prior art, it features a blade fixing seat on a base with a feeding gap for feeding the die-cutting blade. A first thread and a second thread with opposite helical directions are provided on a transmission screw mounted on the base. A first clamping part is sleeved on the transmission screw and screwed to the first thread. The first moving block of the first clamping part is close to the first fixing block and clamps the bottom of the die-cutting blade using the first clamping gap. A second clamping part is sleeved on the transmission screw and screwed to the second thread. The second moving block of the second clamping part is close to the second fixing block and clamps the bottom of the die-cutting blade using the second clamping gap. In actual use, a drive motor drives the transmission screw to rotate, causing the first and second clamping parts to move closer or further apart. The alternating clamping of the bottom of the die-cutting blade by the first and second clamping parts achieves feeding. Furthermore, the clamping of the bottom of the die-cutting blade is not affected by the height of the die-cutting blade, saving the need for a height adjustment mechanism and reducing structural complexity and manufacturing costs.

[0015] In some embodiments, the first movable block is rotatably connected to a first connecting rod at one end away from the first fixed block, and the other end of the first connecting rod is rotatably connected to a first cylinder, the movable end of the first cylinder extending and retracting along the high end direction of the die-cutting blade strip;

[0016] The second movable block is rotatably connected to a second connecting rod at one end away from the second fixed block, and a second cylinder is rotatably connected to the other end of the second connecting rod. The movable end of the second cylinder extends and retracts along the high end of the die-cutting blade.

[0017] By using a cylinder to drive the connecting rod to rotate, the height of the connecting rod end changes, causing the distance between the moving block and the fixed block to change, thus moving them closer or further apart, thereby clamping the die-cutting blade.

[0018] In some embodiments, the first clamping part further includes a first fixing plate and a second fixing plate, the first cylinder, the first connecting rod and the first moving block are all disposed between the first fixing plate and the second fixing plate, the first moving block has a first guide groove on both sides, the first fixing plate and the top of the second fixing plate are both provided with a first guide plate, and the first guide plate is slidably engaged with the first guide groove.

[0019] The second clamping part also includes a third fixing plate and a fourth fixing plate. The second cylinder, the second connecting rod and the second moving block are all located between the third fixing plate and the fourth fixing plate. The second moving block has a second guide groove on both sides. The top of the third fixing plate and the fourth fixing plate are provided with a second guide plate. The second guide plate slides in conjunction with the second guide groove.

[0020] By employing a structure with guide grooves and guide plates, the rotation of the cylinder-driven connecting rod is converted into linear motion that approaches the fixed block, ensuring that the moving block and the fixed block can clamp the bottom of the die-cutting blade.

[0021] In some embodiments, the first cylinder is disposed at one end of the first fixed plate and the second fixed plate away from the die-cutting blade belt. The movable end of the first cylinder is connected to a first mounting block. The top of the first mounting block is open and rotatably connected to the end of the first connecting rod. The other end of the first fixed plate and the second fixed plate near the die-cutting blade belt is provided with a first connecting plate. The first connecting plate is provided with the first fixed block and the first guide plate.

[0022] The second cylinder is located at one end of the third and fourth fixed plates away from the die-cutting blade belt. The movable end of the second cylinder is connected to a second mounting block. The top of the second mounting block is open and rotatably connected to the end of the second connecting rod. The other end of the third and fourth fixed plates near the die-cutting blade belt is provided with a second connecting plate. The second connecting plate is provided with the second fixed block and the second guide plate.

[0023] By fixing the first cylinder at one end of the first fixing plate and the second fixing plate, and fixing the first connecting plate at the other end, the structural stability and compactness of the first clamping part are improved, and the space occupancy rate of the first clamping part is reduced; by fixing the second cylinder at one end of the third fixing plate and the fourth fixing plate, and fixing the second connecting plate at the other end, the structural stability and compactness of the second clamping part are improved, and the space occupancy rate of the second clamping part is reduced.

[0024] In some embodiments, the first clamping part further includes a first connecting nut, a first fixing plate is sleeved on either end of the first connecting nut, a second fixing plate is sleeved on the other end of the first connecting nut, and the first connecting nut is sleeved on the transmission screw and screwed to the first thread.

[0025] The second clamping part also includes a second connecting nut, a third fixing plate is sleeved on either end of the first connecting nut, a fourth fixing plate is sleeved on the other end of the second connecting nut, and the second connecting nut is sleeved on the transmission screw and screwed to the second thread.

[0026] The connection between the first clamping part and the second clamping part and the transmission screw is achieved by the structure in which the connecting nut is sleeved on the transmission screw and the fixing plate is fixed at both ends of the connecting nut, thereby improving the connection stability between the first clamping part and the second clamping part and the transmission screw.

[0027] In some embodiments, the bottom of both the first clamping part and the second clamping part is provided with a guide block, and the base is provided with a guide rail. The guide block is sleeved on the guide rail and slides in cooperation with the guide rail.

[0028] By setting guide rails on the base and setting guide blocks at the bottom of the first clamping part and the second clamping part, the accuracy, smoothness and stability of the movement of the first clamping part and the second clamping part are improved by using the guide blocks sleeved on the guide rails and sliding cooperation with the guide rails.

[0029] In some embodiments, the base is provided with the drive motor, the motor shaft of the drive motor is sleeved with a first gear plate, the end of the transmission screw on the same side as the drive motor is sleeved with a second gear plate, and the first gear plate and the second gear plate are meshed with the same transmission belt.

[0030] By setting a drive motor on the base, the drive motor is connected to the transmission screw through the structure of the first toothed disc, the transmission belt and the second toothed disc to drive the rotation of the transmission screw.

[0031] In some embodiments, the base is provided with a dust cover, and the first clamping part, the second clamping part, and the transmission screw are all covered inside the dust cover.

[0032] By installing a dust cover on the base to cover the first clamping part, the second clamping part, and the transmission screw, the dust protection effect of the feeding mechanism is improved compared to the structure in which the clamping part is set above the die-cutting blade.

[0033] In some embodiments, the base is provided with a jamming alarm part, which is located on the side opposite to the first clamping part. The jamming alarm part moves closer to or away from the die-cutting strip fixing seat along the thickness direction of the die-cutting strip. The base is provided with a detection sensor, and the detection end of the detection sensor faces the jamming alarm part of the die-cutting strip fixing seat.

[0034] By setting a jamming alarm unit and a detection sensor on the base, with the detection end of the detection sensor facing the jamming alarm unit of the die-cutting tape fixing seat, the jamming alarm unit moves closer to or away from the die-cutting tape fixing seat along the thickness direction of the die-cutting tape. In actual use, if the die-cutting tape jams and deforms, the deformation force acts on the jamming alarm unit, pushing it away from the die-cutting tape fixing seat, so that the detection sensor detects the movement of the jamming alarm unit, sends a sensor signal to the control unit, and feeds it back to the host computer operation software of the whole machine for display, which serves as an alarm prompt and improves the safety of use.

[0035] In some embodiments, the die-cutting alarm unit includes a guide rod, a third connecting plate, and a sliding block. The guide rod is fixedly connected to the base and extends along the thickness direction of the die-cutting blade. The third connecting plate is fixed on the guide rod, and the sliding block is connected to the side of the third connecting plate near the blade fixing seat. The sliding block cooperates with the blade fixing seat to form part of the feeding gap.

[0036] The third connecting plate is fixedly connected to the guide rod and the base. The sliding block is connected to the side of the third connecting plate near the blade fixing seat. During the feeding process of the die-cutting blade, if the die-cutting blade is jammed and deformed, the deformation force acts on the sliding block and drives the third connecting plate to move along the direction of the guide rod. This increases the feeding gap between the sliding block and the blade fixing seat. The detection sensor detects the movement of the sliding block, sends a sensor signal to the control unit, and feeds it back to the host computer operation software of the whole machine for display, thus improving the safety of use.

[0037] Based on the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0038] By setting a blade fixing seat on the base, the blade fixing seat has a feeding gap for feeding the die-cutting blade. A first thread and a second thread with opposite helical directions are set on the transmission screw mounted on the base. The first clamping part is sleeved on the transmission screw and screwed to the first thread. The first moving block of the first clamping part is close to the first fixed block and clamps the bottom of the die-cutting blade using the first clamping gap. The second clamping part is sleeved on the transmission screw and screwed to the second thread. The second moving block of the second clamping part is close to the second fixed block and clamps the bottom of the die-cutting blade using the second clamping gap. In actual use, the drive motor drives the transmission screw to rotate, so that the first clamping part and the second clamping part move closer to each other or further away from each other. The feeding of the die-cutting blade is achieved by the first clamping part and the second clamping part alternately clamping the bottom of the die-cutting blade. Moreover, the clamping of the bottom of the die-cutting blade is not affected by the height of the die-cutting blade, saving the setting of a height adjustment mechanism and reducing structural complexity and manufacturing cost. Attached Figure Description

[0039] Figure 1This is a schematic diagram of the structure of this utility model;

[0040] Figure 2 This is a schematic diagram of the structure of this utility model with the dust cover removed;

[0041] Figure 3 For the present utility model Figure 2 A diagram from another perspective;

[0042] Figure 4 This is a schematic diagram of the structure of the first clamping part of this utility model;

[0043] Figure 5 This is a schematic diagram of the structure of the second clamping part of this utility model;

[0044] Figure 6 This is an exploded view of the present invention.

[0045] Explanation of reference numerals in the attached figures:

[0046] 100. Base; 110. Drive screw; 111. Second gear plate; 120. Drive motor; 121. First gear plate; 122. Drive belt; 130. Mounting side plate; 140. Mounting cross plate; 150. Guide rail; 160. Guide rod; 170. Third connecting plate; 180. Sliding block; 190. Detection sensor;

[0047] 200. Blade belt holder; 300. Die-cutting blade belt;

[0048] 400, First clamping part; 410, First moving block; 411, First guide groove; 420, First fixing block; 430, First clamping gap; 440, First cylinder; 441, First mounting block; 450, First connecting rod; 460, First connecting plate; 461, First guide plate; 470, First connecting nut; 480, First fixing plate; 490, Second fixing plate;

[0049] 500, Second clamping part; 510, Second moving block; 511, Second guide groove; 520, Second fixing block; 530, Second clamping gap; 540, Second cylinder; 541, Second mounting block; 550, Second connecting rod; 560, Second connecting plate; 561, Second guide plate; 570, Second connecting nut; 580, Third fixing plate; 590, Fourth fixing plate; 600, Guide block; 700, Dust cover. Detailed Implementation

[0050] To facilitate understanding of this utility model, the specific embodiments of this utility model will be described in more detail below with reference to the accompanying drawings.

[0051] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0052] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0053] It should be noted that in this article, "fixed to" or "connected to" can mean directly fixed to or connected to a component, or indirectly fixed to or connected to a component.

[0054] like Figure 1-6 As shown, this embodiment provides a forward and reverse circulation feeding mechanism, including a base 100, on which a blade fixing seat 200 is provided, and the blade fixing seat 200 has a feeding gap for feeding the die-cutting blade 300.

[0055] A transmission screw 110 is mounted on the base 100. The transmission screw 110 extends along the feeding direction of the die-cutting blade belt 300. The outer peripheral wall of the transmission screw 110 is provided with a first thread and a second thread, and the helical directions of the first thread and the second thread are opposite.

[0056] The transmission lead screw 110 is provided with the first thread and the second thread with the center as the dividing point.

[0057] A first clamping part 400 is provided in the first threaded area of ​​the transmission screw 110 and is screwed to the first thread. The first clamping part 400 includes a first moving block 410 and a first fixed block 420. A first clamping gap 430 is provided between the first moving block 410 and the first fixed block 420. The first moving block 410 moves along the thickness direction of the die-cutting blade strip 300 to clamp the bottom of the die-cutting blade strip 300 near or away from the first fixed block 420 and release the die-cutting blade strip 300.

[0058] A second clamping part 500 is provided in the second threaded area of ​​the transmission screw 110 and is screwed to the second thread. The second clamping part 500 includes a second moving block 510 and a second fixed block 520. A second clamping gap 530 is provided between the second moving block 510 and the second fixed block 520. The second moving block 510 moves along the thickness direction of the die-cutting blade strip 300 to approach the second fixed block 520 to clamp the bottom of the die-cutting blade strip 300 or moves away from the second fixed block 520 to release the die-cutting blade strip 300.

[0059] The transmission screw 110 is connected to a drive motor 120. The drive motor 120 drives the transmission screw 110 to rotate, causing the first clamping part 400 and the clamping part to move closer to each other or further apart along the axial direction of the transmission screw 110.

[0060] Specifically, mounting side plates 130 are provided on both sides of the base 100, and both ends of the transmission screw 110 are rotatably connected to the mounting side plate 130 on the same side via bearings.

[0061] A drive motor 120 is mounted on the base 100. A first gear 121 is mounted on the motor shaft of the drive motor 120. The end of the transmission screw 110 on the same side as the drive motor 120 passes through the mounting side plate 130 and is connected to a second gear 111. The second gear 111 and the first gear 121 are connected by the meshing of the transmission belt 122 to realize the transmission connection between them, thereby enabling the drive motor 120 to drive the transmission screw 110 to rotate.

[0062] The first movable block 410 is rotatably connected to a first connecting rod 450 at one end away from the first fixed block 420, and the other end of the first connecting rod 450 is rotatably connected to a first cylinder 440. The movable end of the first cylinder 440 extends and retracts along the high end direction of the die-cutting blade belt 300.

[0063] Specifically, the first clamping part 400 further includes a first fixing plate 480 and a second fixing plate 490. The first cylinder 440, the first connecting rod 450 and the first moving block 410 are all disposed between the first fixing plate 480 and the second fixing plate 490. The first moving block 410 has a first guide groove 411 on both sides. The first fixing plate 480 and the top of the second fixing plate 490 are both provided with a first guide plate 461. The first guide plate 461 slides in cooperation with the first guide groove 411.

[0064] Furthermore, the first cylinder 440 is disposed at one end of the first fixed plate 480 and the second fixed plate 490 away from the die-cutting blade belt 300. The movable end of the first cylinder 440 is connected to the first mounting block 441. The top of the first mounting block 441 is open and rotatably connected to the end of the first connecting rod 450. The other end of the first fixed plate 480 and the second fixed plate 490 near the die-cutting blade belt 300 is provided with a first connecting plate 460. The first connecting plate 460 is provided with the first fixed block 420 and the first guide plate 461.

[0065] Furthermore, the first clamping part 400 also includes a first connecting nut 470, a first fixing plate 480 sleeved on either end of the first connecting nut 470, a second fixing plate 490 sleeved on the other end of the first connecting nut 470, and the first connecting nut 470 sleeved on the transmission screw 110 and screwed to the first thread.

[0066] The second moving block 510 is rotatably connected to a second connecting rod 550 at one end away from the second fixed block 520, and the other end of the second connecting rod 550 is rotatably connected to a second cylinder 540. The movable end of the second cylinder 540 extends and retracts along the high end of the die-cutting blade belt 300.

[0067] Specifically, the second clamping part 500 also includes a third fixing plate 580 and a fourth fixing plate 590. The second cylinder 540, the second connecting rod 550 and the second moving block 510 are all disposed between the third fixing plate 580 and the fourth fixing plate 590. The second moving block 510 has a second guide groove 511 on both sides. The top of the third fixing plate 580 and the fourth fixing plate 590 are provided with a second guide plate 561, and the second guide plate 561 slides in cooperation with the second guide groove 511.

[0068] Furthermore, the second cylinder 540 is disposed at one end of the third fixing plate 580 and the fourth fixing plate 590 away from the die-cutting blade belt 300. The movable end of the second cylinder 540 is connected to the second mounting block 541. The top of the second mounting block 541 is open and rotatably connected to the end of the second connecting rod 550. The other end of the third fixing plate 580 and the fourth fixing plate 590 near the die-cutting blade belt 300 is provided with a second connecting plate 560. The second connecting plate 560 is provided with the second fixing block 520 and the second guide plate 561.

[0069] Furthermore, the second clamping part 500 also includes a second connecting nut 570, a third fixing plate 580 sleeved on either end of the first connecting nut 470, a fourth fixing plate 590 sleeved on the other end of the second connecting nut 570, and the second connecting nut 570 sleeved on the transmission screw 110 and screwed to the second thread.

[0070] The bottom of the first clamping part 400 and the second clamping part 500 are both provided with guide blocks 600, and the base 100 is provided with a guide rail 150. The guide block 600 is sleeved on the guide rail 150 and slides in cooperation with the guide rail 150.

[0071] Specifically, the guide block 600 is disposed at the bottom of the first connecting nut 470 and the second connecting nut 570.

[0072] The base 100 is provided with a cutter jamming alarm part, which is located on the side opposite to the first clamping part 400. The cutter jamming alarm part moves closer to or away from the cutter belt fixing seat 200 along the thickness direction of the die-cutting blade 300. The base 100 is provided with a detection sensor 190, and the detection end of the detection sensor 190 faces the cutter jamming alarm part of the cutter belt fixing seat 200.

[0073] Specifically, the base 100 is provided with a mounting plate 140 that is fixedly connected to two mounting side plates 130, and the detection sensor 190 is disposed on the mounting plate 140.

[0074] The detection sensor 190 described in this embodiment can be either an infrared sensor or a photosensitive sensor from the prior art, as long as it can detect that the die-cutting alarm part is squeezed open by the deformed die-cutting blade strip 300.

[0075] It is understood that the sensor signal detected by sensor 190 is transmitted to the control unit of the entire forward and reverse circulation feeding mechanism, and then fed back to the host computer operation software of the whole machine for display, so as to serve as an alarm and facilitate the control of stopping the forward and reverse circulation feeding mechanism. The control modules are all control box structures in the existing technology, and will not be described in detail here.

[0076] Specifically, the die-cutting alarm unit includes a guide rod 160, a third connecting plate 170, and a sliding block 180. The guide rod 160 is fixedly connected to the base 100 and extends along the thickness direction of the die-cutting blade 300. The third connecting plate 170 is fixed on the guide rod 160. The sliding block 180 is connected to the side of the third connecting plate 170 near the blade fixing seat 200. The sliding block 180 cooperates with the blade fixing seat 200 to form part of the feeding gap.

[0077] The base 100 is provided with a dust cover 700, and the first clamping part 400, the second clamping part 500 and the transmission screw 110 are all covered inside the dust cover 700.

[0078] Specifically, the dust cover 700 is connected to the mounting side plate 130 to fix it to the base 100.

[0079] The forward and reverse circulation feeding mechanism provided in this embodiment, compared with the prior art, involves setting a blade fixing seat 200 on the base 100, the blade fixing seat 200 having a feeding gap for feeding the die-cutting blade 300, and setting a first thread and a second thread with opposite helical directions on the transmission screw mounted on the base 100. The first clamping part 400 is sleeved on the transmission screw 110 and screwed to the first thread. The first moving block 410 of the first clamping part 400 is close to the first fixing block 420 and clamps the bottom of the die-cutting blade 300 using the first clamping gap 430. The second clamping part 500 and the second thread sleeved on the transmission screw 110 are connected to the first thread. The second moving block 510 of the second clamping part 500 is close to the second fixed block 520 and clamps the bottom of the die-cutting blade belt 300 using the second clamping gap 530. In actual use, the drive motor 120 drives the transmission screw 110 to rotate so that the first clamping part 400 and the second clamping part 500 move closer or further apart. The first clamping part 400 and the second clamping part 500 alternately clamp the bottom of the die-cutting blade belt 300 to realize the feeding of the die-cutting blade belt 300. Moreover, the clamping of the bottom of the die-cutting blade belt 300 is not affected by the height of the die-cutting blade belt 300, saving the setting of a height adjustment mechanism and reducing structural complexity and manufacturing cost.

[0080] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A forward and reverse circulation feeding mechanism, characterized in that, include: Base (100); A die-cutting blade holder (200) is provided on the base (100) and has a feeding gap for feeding the die-cutting blade (300); The transmission screw (110) is mounted on the base (100) and extends along the feeding direction of the die-cutting blade (300). The outer peripheral wall is provided with a first thread and a second thread, and the helical directions of the first thread and the second thread are opposite. A first clamping part (400) is sleeved on the transmission screw (110) and screwed to the first thread. It includes a first moving block (410) and a first fixed block (420). A first clamping gap (430) is provided between the first moving block (410) and the first fixed block (420). The first moving block (410) moves along the thickness direction of the die-cutting blade strip (300) to approach the bottom of the die-cutting blade strip (300) from the first fixed block (420) or to release the die-cutting blade strip (300) away from the first fixed block (420). The second clamping part (500) is sleeved on the transmission screw (110) and screwed to the second thread. It includes a second moving block (510) and a second fixed block (520). A second clamping gap (530) is provided between the second moving block (510) and the second fixed block (520). The second moving block (510) moves along the thickness direction of the die-cutting blade strip (300) to approach the second fixed block (520) to clamp the bottom of the die-cutting blade strip (300) or moves away from the second fixed block (520) to release the die-cutting blade strip (300). The drive motor (120) is connected to the transmission screw (110) and drives the transmission screw (110) to rotate, causing the first clamping part (400) and the clamping part to move closer to each other or further apart along the axial direction of the transmission screw (110).

2. The forward and reverse circulation feeding mechanism as described in claim 1, characterized in that, The first movable block (410) is rotatably connected to a first connecting rod (450) at one end away from the first fixed block (420), and the other end of the first connecting rod (450) is rotatably connected to a first cylinder (440). The movable end of the first cylinder (440) extends and retracts along the high end direction of the die-cutting blade strip (300). The second movable block (510) is rotatably connected to a second connecting rod (550) at one end away from the second fixed block (520), and the other end of the second connecting rod (550) is rotatably connected to a second cylinder (540). The movable end of the second cylinder (540) extends and retracts along the high end of the die-cutting blade strip (300).

3. The forward and reverse circulation feeding mechanism as described in claim 2, characterized in that, The first clamping part (400) further includes a first fixing plate (480) and a second fixing plate (490). The first cylinder (440), the first connecting rod (450) and the first moving block (410) are all disposed between the first fixing plate (480) and the second fixing plate (490). The first moving block (410) has a first guide groove (411) on both sides. The first fixing plate (480) and the top of the second fixing plate (490) are both provided with a first guide plate (461). The first guide plate (461) slides in cooperation with the first guide groove (411). The second clamping part (500) also includes a third fixing plate (580) and a fourth fixing plate (590). The second cylinder (540), the second connecting rod (550) and the second moving block (510) are all located between the third fixing plate (580) and the fourth fixing plate (590). The second moving block (510) has a second guide groove (511) on both sides. The top of the third fixing plate (580) and the fourth fixing plate (590) are provided with a second guide plate (561). The second guide plate (561) slides in cooperation with the second guide groove (511).

4. The forward and reverse circulation feeding mechanism as described in claim 3, characterized in that, The first cylinder (440) is located at the end of the first fixed plate (480) and the second fixed plate (490) away from the die-cutting blade belt (300). The movable end of the first cylinder (440) is connected to the first mounting block (441). The top of the first mounting block (441) is open and rotatably connected to the end of the first connecting rod (450). The other end of the first fixed plate (480) and the second fixed plate (490) near the die-cutting blade belt (300) is provided with a first connecting plate (460). The first connecting plate (460) is provided with the first fixed block (420) and the first guide plate (461). The second cylinder (540) is located at one end of the third fixed plate (580) and the fourth fixed plate (590) away from the die-cutting blade belt (300). The movable end of the second cylinder (540) is connected to the second mounting block (541). The top of the second mounting block (541) is open and rotatably connected to the end of the second connecting rod (550). The other end of the third fixed plate (580) and the fourth fixed plate (590) near the die-cutting blade belt (300) is provided with a second connecting plate (560). The second connecting plate (560) is provided with the second fixed block (520) and the second guide plate (561).

5. The forward and reverse circulation feeding mechanism as described in claim 3, characterized in that, The first clamping part (400) further includes a first connecting nut (470), a first fixing plate (480) is sleeved on either end of the first connecting nut (470), a second fixing plate (490) is sleeved on the other end of the first connecting nut (470), and the first connecting nut (470) is sleeved on the transmission screw (110) and screwed to the first thread; The second clamping part (500) also includes a second connecting nut (570), a third fixing plate (580) sleeved on either end of the first connecting nut (470), a fourth fixing plate (590) sleeved on the other end of the second connecting nut (570), and the second connecting nut (570) sleeved on the transmission screw (110) and screwed to the second thread.

6. The forward and reverse circulation feeding mechanism as described in any one of claims 1-5, characterized in that, The bottom of the first clamping part (400) and the second clamping part (500) are provided with guide blocks (600), and the base (100) is provided with guide rails (150). The guide blocks (600) are sleeved on the guide rails (150) and slide in cooperation with the guide rails (150).

7. The forward and reverse circulation feeding mechanism as described in any one of claims 1-5, characterized in that, The base (100) is provided with the drive motor (120), the motor shaft of the drive motor (120) is sleeved with a first gear plate (121), the end of the transmission screw (110) on the same side as the drive motor (120) is sleeved with a second gear plate (111), and the first gear plate (121) and the second gear plate (111) are meshed with the same transmission belt (122).

8. The forward and reverse circulation feeding mechanism as described in any one of claims 1-5, characterized in that, The base (100) is provided with a dust cover, and the first clamping part (400), the second clamping part (500) and the transmission screw (110) are all covered inside the dust cover.

9. The forward and reverse circulation feeding mechanism as described in any one of claims 1-5, characterized in that, The base (100) is provided with a cutter alarm part, which is located on the side opposite to the first clamping part (400). The cutter alarm part moves closer to or away from the cutter belt fixing seat (200) along the thickness direction of the die-cutting cutter belt (300). The base (100) is provided with a detection sensor (190), and the detection end of the detection sensor (190) faces the cutter alarm part of the cutter belt fixing seat (200).

10. The positive displacement feed mechanism of claim 9, wherein, The die-cutting alarm unit includes a guide rod (160), a third connecting plate (170), and a sliding block (180). The guide rod (160) is fixedly connected to the base (100). The guide rod (160) extends along the thickness direction of the die-cutting blade (300). The third connecting plate (170) is fixed on the guide rod (160). The sliding block (180) is connected to the side of the third connecting plate (170) near the blade fixing seat (200). The sliding block (180) cooperates with the blade fixing seat (200) to form the feeding gap.

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