An express delivery packaging bag positioning and cutting device and its usage method

Abstract

The present invention discloses a positioning and cutting device for express delivery packaging bags and its usage method, including a workbench and a slider. A chute for supporting the lateral sliding of the slider is provided in the middle of the workbench. A conveyor belt is arranged below the workbench, and a conveyor for supporting the rotation of the conveyor belt is arranged on the bottom side of the conveyor belt. A toothed belt is arranged above the conveyor belt, and two groups of pulleys for supporting the rotation of the toothed belt are arranged on both sides of the bottom of the conveyor belt. A motor for supporting the rotation of the pulley is arranged on the top of the workbench. The beneficial effects are as follows: By ensuring that during the cutting process of the packaging bag by the cutter, the cutter and the packaging bag above the conveyor belt are in a synchronous sliding state, the relative static state between the cutter and the packaging bag is maintained, and the conveyor belt is ensured to be in a continuous conveying and moving state, the production efficiency is guaranteed, the cut of the packaging bag is prevented from being torn, and the cutting edge is protected, avoiding damage to the cutting edge or the conveyor belt caused by the relative movement between the cutting edge and the conveyor belt, and it has strong practicability.

Description

Technical Field

[0001] The present invention relates to the field of packaging bag production equipment, and particularly relates to a positioning and cutting device for express delivery packaging bags and a using method thereof. Background Art

[0002] Express delivery packaging bags are used to package express goods, materials, documents or bills in our daily life and work. Currently, the most widely used is the plastic bag made of polyethylene, because it has low cost, good waterproof performance, and is especially favored by people for its convenience. Other types of express delivery bags include express delivery plastic bags, express delivery document envelopes, express delivery bubble bags, and express delivery woven bags, etc. These commonly used bags together constitute the packaging bags in the express delivery industry. During the production process of express delivery packaging bags, they all need to be segmented and cut to cut the packaging bag raw materials into the length of a single packaging bag.

[0003] The applicant of the present invention has found that there are at least the following technical problems in the prior art: the existing express delivery packaging bags are placed on a continuously moving conveyor belt during the cutting process, and the cutting knife, the conveyor belt, and the packaging bag are all in a relative moving state. When the cutting knife cuts into the packaging bag, the packaging bag is still in a moving state, which easily causes problems such as the cut being torn and the cutting edge of the cutting knife being pulled and curled, and the practicability is poor. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems by providing a positioning and cutting device for express delivery packaging bags and a using method thereof. A cutting knife that can move up and down is arranged above the conveyor belt for continuously conveying the packaging bags. During the process of the cutting knife moving down to cut the packaging bag, the meshing state between the teeth on the synchronous plate and the toothed belt is maintained, so as to ensure that the cutting knife and the packaging bag above the conveyor belt are in a synchronous sliding state during the cutting process of the cutting knife on the packaging bag, so as to keep the cutting knife and the packaging bag relatively stationary, and ensure that the conveyor belt is in a continuous conveying and moving state, ensuring the production efficiency, avoiding the cut of the packaging bag from being torn, and protecting the cutting edge, avoiding damage to the cutting edge or the conveyor belt caused by the relative movement between the cutting edge and the conveyor belt, and the practicability is strong. See the following description for details.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A positioning and cutting device for express delivery packaging bags provided by the present invention includes a workbench and a slider. A chute for supporting the lateral sliding of the slider is arranged in the middle of the workbench. A conveyor belt is arranged below the workbench, and a conveyor for supporting the rotation of the conveyor belt is arranged on the bottom side of the conveyor belt. A toothed belt is arranged above the conveyor belt, and two groups of pulleys for supporting the rotation of the toothed belt are arranged on both sides of the bottom of the conveyor belt. A motor for supporting the rotation of the pulley is arranged on the top of the workbench;

[0007] A cylinder is fixed to the top of the slider. The telescopic end of the bottom of the cylinder extends downward below the workbench, and a guide rod vertically extending in front of the toothed belt is fixed to the telescopic end of the bottom of the cylinder. A fixed disk is fixed to the bottom end of the guide rod, and a cutter vertically extending above the conveyor belt is arranged at the bottom of the fixed disk. A synchronous plate is vertically slidably matched with the outer side of the guide rod. A clamping tooth for clamping and matching with the toothed belt is arranged at the bottom of the rear side of the synchronous plate. A spring is arranged on the outer side of the guide rod above the synchronous plate.

[0008] Preferably, an extension rod is horizontally fixed to the outer side of the slider. The extension rod horizontally penetrates through the workbench, and a stop block is fixed to one end of the extension rod penetrating through the workbench. A compression spring is sleeved on the outer part of the extension rod inside the sliding groove.

[0009] Preferably, the guide rod is a vertically extending rectangular long bar structure. A rectangular through groove for accommodating the guide rod to penetrate is arranged on the synchronous plate. The synchronous plate is vertically slidably matched with the guide rod through this through groove.

[0010] Preferably, an extension cylinder for accommodating the extension rod to horizontally penetrate is arranged on the workbench. The extension cylinder is in clearance fit with the extension rod. Two groups of C-shaped bent rod-shaped side rods with openings facing upward are fixed to the front and rear sides of the workbench.

[0011] Preferably, two groups of side support arms distributed in an "eight" shape are arranged on both sides of the bottom of the workbench. A receiving groove vertically penetrates through the workbench behind the motor. A longitudinal axis extending longitudinally is fixed to the middle of the belt pulley. The longitudinal axis penetrates into the inner side of the side support arm and is rotationally matched with the side support arm. A driving gear and a driven gear are sequentially fixed to one end of the rear part of the longitudinal axis.

[0012] Preferably, a driving wheel is fixed to the output end of the motor. A transmission belt is connected in transmission between the driving wheel and the driven wheel. The transmission belt penetrates into the inner side of the receiving groove, and the width of the receiving groove is greater than the width of the transmission belt.

[0013] Preferably, the conveyor includes two groups of side plates symmetrically distributed front and rear. Two groups of rotating shafts longitudinally extending are horizontally arranged between the two groups of side plates. The rotating shafts are rotationally matched with the side plates. A guide roller is fixed to the outer side of the front end of the rotating shaft. The conveyor belt is sleeved on the outer sides of the two groups of guide rollers.

[0014] Preferably, a transmission gear is fixed to the outer part of the rotating shaft below the motor. The transmission gear is meshed with the driving gear. Two groups of bottom frames are horizontally arranged on the outer sides of the two groups of side plates. The bottom frame is a C-shaped bent rod with an opening facing upward, and both ends of the bottom frame are respectively fixed to the outer parts of the two groups of side plates.

[0015] Preferably, the compression stroke of the spring is greater than the distance between the engaging teeth and the toothed belt, the length of the engaging teeth is greater than the width of the toothed belt, and the length of the cutting knife is greater than the thickness of the toothed belt.

[0016] The usage method of the express delivery packaging bag positioning and cutting device includes the following steps:

[0017] a. When punching and cutting an express delivery packaging bag, place the express delivery packaging bag on the top side of the conveyor belt along the side away from the motor. Drive the transmission belt to rotate through the motor, and transmit the power of the motor to the vertical shaft through the transmission belt. At this time, the pulley supporting the toothed belt connecting the two vertical shafts rotates clockwise;

[0018] b. At the same time, the driving gear on the vertical shaft drives the transmission gear on the conveyor shaft to rotate. At this time, the shaft and the guide roller rotate counterclockwise, and the conveyor belt is supported by the guide roller to rotate counterclockwise. The bottom side of the toothed belt and the top side of the conveyor belt both rotate towards the motor direction. At the same time, the conveyor belt supports the packaging bag to be punched and moves it to the bottom side of the slider, realizing the transportation action of the packaging bag;

[0019] c. When the packaging bag moves to the bottom side of the slider, the telescopic end of the cylinder extends to drive the guide rod and the synchronous plate to move downward. The engaging teeth on the bottom side of the synchronous plate first contact and engage with the rotating toothed belt. The toothed belt drives the engaging teeth to drive the synchronous plate, the guide rod, and the slider to move horizontally along the chute. At this time, the slider and the bottom side of the toothed belt as well as the top side of the conveyor belt perform synchronous sliding in the same direction;

[0020] d. Through the meshing action between the engaging teeth at the bottom of the slider and the toothed belt, the slider realizes synchronous sliding following the packaging bag on the top side of the conveyor belt. Then, the telescopic end of the cylinder continues to extend to drive the fixed disk and the cutting knife to continue moving downward. At this time, the synchronous plate maintains the state of tight engagement and transmission with the toothed belt, and then the cutting knife moving downward presses and cuts the packaging bag on the top side of the conveyor belt;

[0021] e. After completing one cutting action, the telescopic end of the cylinder contracts, the synchronous plate is separated from the toothed belt, and the pulling and moving state of the toothed belt on the synchronous plate is released. Then, the slider is supported by the compressed state of the compression spring to reset along the chute, so as to prepare for the next cutting action.

[0022] The beneficial effects are as follows: In the present invention, a cutting knife that can move up and down is provided above the conveyor belt that continuously conveys packaging bags, and the engaging teeth on the synchronous plate are kept in an engaged state with the toothed belt during the process of the cutting knife moving downward to cut the packaging bag. Furthermore, during the process of the cutting knife cutting the packaging bag, the cutting knife and the packaging bag above the conveyor belt are in a synchronous sliding state, so as to keep the cutting knife and the packaging bag relatively stationary, ensure that the conveyor belt is in a continuous conveying and moving state, ensure production efficiency, avoid the cut of the packaging bag being torn, and protect the blade, avoiding damage to the blade edge or the conveyor belt caused by the relative movement between the blade and the conveyor belt. It has strong practicability. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 is the front view structure diagram of the present invention;

[0025] Figure 2 is the three-dimensional structure schematic diagram of the present invention;

[0026] Figure 3 is the structure splitting schematic diagram of the present invention;

[0027] Figure 4 is the structure splitting schematic diagram of the workbench and the slider of the present invention;

[0028] Figure 5 is the three-dimensional structure schematic diagram of the slider of the present invention;

[0029] Figure 6 is the structure splitting schematic diagram of the slider of the present invention;

[0030] Figure 7 is the structure splitting schematic diagram of the conveyor and the conveyor belt of the present invention.

[0031] The description of the reference numerals is as follows:

[0032] 1. Workbench; 101. Slide groove; 102. Accommodating groove; 103. Extension cylinder; 104. Side support arm; 105. Side rod; 2. Slider; 201. Cylinder; 202. Guide rod; 203. Fixed disk; 204. Cutter; 205. Synchronization plate; 206. Tooth; 207. Spring; 208. Extension rod; 208a. Compression spring; 209. Stopper; 3. Conveyor; 301. Side plate; 302. Rotating shaft; 303. Guide roller; 304. Underframe; 305. Driving gear; 4. Motor; 401. Driving wheel; 402. Transmission belt; 5. Belt pulley; 501. Longitudinal axis; 502. Driving gear; 503. Driven wheel; 6. Toothed belt; 7. Conveyor belt. Detailed Embodiments

[0033] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0034] Referring to Figures 1 - 7 As shown in the figure, the present invention provides a positioning and cutting device for express delivery packaging bags, which includes a workbench 1 and a slider 2. A chute 101 for supporting the horizontal sliding of the slider 2 is provided in the middle of the workbench 1. A conveyor belt 7 is provided below the workbench 1. A conveyor 3 for supporting the rotation of the conveyor belt 7 is provided on the bottom side of the conveyor belt 7. A toothed belt 6 is provided above the conveyor belt 7. Two sets of pulleys 5 for supporting the rotation of the toothed belt 6 are provided on both sides of the bottom of the conveyor belt 7. A motor 4 for supporting the rotation of the pulley 5 is provided on the top of the workbench 1;

[0035] A cylinder 201 is fixed to the top of the slider 2. The bottom telescopic end of the cylinder 201 extends downward below the workbench 1. The bottom telescopic end of the cylinder 201 is fixed with a guide rod 202 extending vertically in front of the toothed belt 6. The bottom end of the guide rod 202 is fixed with a fixed disk 203. A cutting knife 204 extending vertically above the conveyor belt 7 is provided at the bottom of the fixed disk 203. A synchronous plate 205 is slidably fitted vertically on the outside of the guide rod 202. A tooth 206 for clamping and mating with the toothed belt 6 is provided at the bottom of the rear side of the synchronous plate 205. A spring 207 is provided on the outside of the guide rod 202 above the synchronous plate 205. Further, the compression stroke of the spring 207 is greater than the distance between the tooth 206 and the toothed belt 6, and the length of the tooth 206 is greater than the width of the toothed belt 6. The length of the cutting knife 204 is greater than the thickness of the toothed belt 6, ensuring that the cutting knife 204 can abut against the top side of the packaging bag placed above the conveyor belt 7 during the downward movement, so as to cut the packaging bag with the cutting knife 204.

[0036] As an optional implementation manner, an extension rod 208 is fixed horizontally on the outside of the slider 2. The extension rod 208 horizontally penetrates through the workbench 1. A stop block 209 is fixed to the end of the extension rod 208 that penetrates through the workbench 1. A compression spring 208a is sleeved on the outside of the extension rod 208 inside the chute 101. The guide rod 202 is a vertically extending rectangular strip structure. A rectangular through groove for accommodating the guide rod 202 to penetrate is provided on the synchronous plate 205. The synchronous plate 205 is vertically slidably fitted with the guide rod 202 through this through groove. An extension cylinder 103 for accommodating the horizontal penetration of the extension rod 208 is provided on the workbench 1. The extension cylinder 103 is in clearance fit with the extension rod 208. Two sets of C-shaped bent rod-shaped side rods 105 with openings facing upward are fixed to the front and rear sides of the workbench 1. The initial position of the slider 2 in the chute 101 is maintained by the compression spring 208a;

[0037] Two groups of side arms 104 in an "eight" shape are arranged on both sides of the bottom of the workbench 1, and a receiving groove 102 is vertically penetrated on the workbench 1 behind the motor 4. A longitudinal axis 501 extending longitudinally is fixed in the middle of the pulley 5. The longitudinal axis 501 penetrates the inner side of the side arm 104 and rotates with the side arm 104. A driving gear 502 and a driven wheel 503 are fixed to one end of the rear of the longitudinal axis 501 in sequence. A driving wheel 401 is fixed to the output end of the motor 4. A transmission belt 402 is connected between the driving wheel 401 and the driven wheel 503. The transmission belt 402 penetrates the inner side of the receiving groove 102, and the width of the receiving groove 102 is greater than the width of the transmission belt 402. The conveyor 3 includes two There are two groups of side panels 301 symmetrically distributed front and back, two groups of longitudinally extending rotating shafts 302 are transversely arranged between the two groups of side panels 301, the rotating shafts 302 are rotatably matched with the side panels 301, a guide roller 303 is fixed to the outer side of the front end of the rotating shaft 302, the conveyor belt 7 is sleeved on the outer sides of the two groups of guide rollers 303, a transmission gear 305 is fixed to the outer side of the rotating shaft 302 below the motor 4, the transmission gear 305 is meshed with the driving gear 502, and two groups of base frames 304 are transversely arranged on the outer sides of the two groups of side panels 301, the base frames 304 are C-shaped curved rods with openings facing upwards, and the two ends of the base frames 304 are respectively fixed to the outside of the two groups of side panels 301, and the whole equipment is supported to the set installation position through the base frames 304.

[0038] The method for using the express packaging bag positioning and cutting device comprises the following steps:

[0039] a. When the express packaging bag needs to be punched and cut, the express packaging bag is placed on the top side of the conveyor belt 7 along the side away from the motor 4, and the transmission belt 402 is driven by the motor 4 to rotate, and the power of the motor 4 is transmitted to the longitudinal shaft 501 through the transmission belt 402. At this time, the pulley 5 connecting the two sets of longitudinal shafts 501 supports the toothed belt 6 to rotate clockwise;

[0040] b. At the same time, the driving gear 502 on the longitudinal axis 501 drives the transmission gear 305 on the rotating shaft 302 of the conveyor 3 to rotate. At this time, the rotating shaft 302 and the guide roller 303 rotate counterclockwise, and the guide roller 303 supports the conveyor belt 7 to rotate counterclockwise. The bottom side of the toothed belt 6 and the top side of the conveyor belt 7 rotate toward the direction of the motor 4. At the same time, the conveyor belt 7 supports the packaging bag that needs to be punched and moves it to the bottom side of the slider 2, so as to realize the transportation of the packaging bag;

[0041] c. When the packaging bag moves to the bottom side of the slider 2, the telescopic end of the cylinder 201 extends to drive the guide rod 202 and the synchronous plate 205 to move downward, and the latching teeth 206 on the bottom side of the synchronous plate 205 first contact and engage with the rotating toothed belt 6, and the toothed belt 6 drives the latching teeth 206 to drive the synchronous plate 205, the guide rod 202, and the slider 2 to move horizontally along the slide groove 101. At this time, the slider 2 and the bottom side of the toothed belt 6 and the top side of the conveyor belt 7 slide synchronously in the same direction;

[0042] d. The slider 2 realizes synchronous sliding with the packaging bag moving on the top side of the conveyor belt 7 through the meshing action of the bottom teeth 206 of the slider 2 and the toothed belt 6. Then, the telescopic end of the air cylinder 201 continuously extends to drive the fixed plate 203 and the cutting knife 204 to continuously move downward. At this time, the synchronous plate 205 maintains the state of pressing and meshing transmission with the toothed belt 6, and then the packaging bag on the top side of the conveyor belt 7 is pressed and cut by the downward moving cutting knife 204.

[0043] e. After a cutting action is completed, the telescopic end of the air cylinder 201 contracts, the synchronous plate 205 is separated from the toothed belt 6, and the pulling and moving state of the toothed belt 6 on the synchronous plate 205 is released. Then, the slider 2 is supported by the compressed state of the compression spring 208a to reset along the chute 101, so as to prepare for the next cutting action.

[0044] By arranging a vertically movable cutting knife 204 above the conveyor belt 7 that continuously conveys packaging bags, and maintaining the meshing state of the teeth 206 on the synchronous plate 205 and the toothed belt 6 during the downward movement of the cutting knife 204 for cutting the packaging bag, it is ensured that the cutting knife 204 and the packaging bag above the conveyor belt 7 are in a synchronous sliding state during the cutting process of the packaging bag by the cutting knife 204, so as to keep the cutting knife 204 and the packaging bag relatively stationary, ensure that the conveyor belt 7 is in a continuous conveying and moving state, ensure the production efficiency, avoid the tearing of the packaging bag incision, and protect the cutting edge to prevent damage to the cutting edge or the conveyor belt 7 caused by the relative movement between the cutting edge and the conveyor belt 7, with strong practicability.

[0045] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. A positioning and cutting device for express delivery packaging bags, characterized in that: It includes a workbench (1) and a slider (2). A chute (101) for supporting the lateral sliding of the slider (2) is arranged in the middle of the workbench (1). A conveyor belt (7) is arranged below the workbench (1). A conveyor (3) for supporting the rotation of the conveyor belt (7) is arranged on the bottom side of the conveyor belt (7). A toothed belt (6) is arranged above the conveyor belt (7). Two sets of pulleys (5) for supporting the rotation of the toothed belt (6) are arranged on both sides of the bottom of the conveyor belt (7). A motor (4) for supporting the rotation of the pulley (5) is arranged on the top of the workbench (1). A cylinder (201) is fixed on the top of the slider (2). The bottom telescopic end of the cylinder (201) extends downward below the workbench (1). The bottom telescopic end of the cylinder (201) is fixed with a guide rod (202) vertically extending in front of the toothed belt (6). A fixed disk (203) is fixed at the bottom end of the guide rod (202). A cutter (204) vertically extending above the conveyor belt (7) is arranged at the bottom of the fixed disk (203). A synchronous plate (205) is vertically slidably matched with the outer side of the guide rod (202). A cog (206) for clamping and matching with the toothed belt (6) is arranged at the bottom of the rear side of the synchronous plate (205). A spring (207) is arranged on the outer side of the guide rod (202) above the synchronous plate (205).

2. The positioning and cutting device for an express delivery packaging bag according to claim 1, characterized in that: An extension rod (208) is horizontally fixed on the outer side of the slider (2). The extension rod (208) horizontally penetrates through the workbench (1). A stop block (209) is fixed at one end of the extension rod (208) penetrating through the workbench (1). A compression spring (208a) is sleeved on the outside of the extension rod (208) inside the chute (101).

3. The positioning and cutting device for express delivery packaging bags according to claim 2, wherein: The guide rod (202) is a vertically extending rectangular strip structure. A rectangular through groove for accommodating the penetration of the guide rod (202) is arranged on the synchronous plate (205). The synchronous plate (205) is vertically slidably matched with the guide rod (202) through the through groove.

4. The positioning and cutting device for an express delivery packaging bag according to claim 3, wherein: An extension cylinder (103) for accommodating the horizontal penetration of the extension rod (208) is arranged on the workbench (1). The extension cylinder (103) is in clearance fit with the extension rod (208). Two sets of C-shaped bent rod-shaped side rods (105) with openings facing upward are fixed on the front and rear sides of the workbench (1).

5. The positioning and cutting device for an express delivery packaging bag according to claim 4, wherein: Two sets of side support arms (104) distributed in an "eight" shape are arranged on both sides of the bottom of the workbench (1). An accommodation groove (102) vertically penetrates through the workbench (1) behind the motor (4). A longitudinal axis (501) extending longitudinally is fixed in the middle of the pulley (5). The longitudinal axis (501) penetrates into the inner side of the side support arm (104) and is rotationally matched with the side support arm (104). A driving gear (502) and a driven wheel (503) are sequentially fixed at one end of the rear part of the longitudinal axis (501).

6. The positioning and cutting device for an express delivery packaging bag according to claim 5, wherein: A driving wheel (401) is fixed to the output end of the motor (4). A transmission belt (402) is connected between the driving wheel (401) and a driven wheel (503). The transmission belt (402) penetrates into the inner side of the accommodation groove (102), and the width of the accommodation groove (102) is greater than that of the transmission belt (402).

7. The positioning and cutting device for express delivery packaging bags according to claim 6, wherein: The conveyor (3) includes two groups of side plates (301) symmetrically distributed front and back. Two longitudinally extending rotating shafts (302) are transversely arranged between the two groups of side plates (301). The rotating shafts (302) are rotatably matched with the side plates (301). A guide roller (303) is fixed to the outer side of the front end of the rotating shaft (302). The conveyor belt (7) is sleeved on the outer sides of the two guide rollers (303).

8. The positioning and cutting device for an express delivery packaging bag according to claim 7, wherein: A transmission gear (305) is fixed to the outside of the rotating shaft (302) below the motor (4). The transmission gear (305) meshes with the driving gear (502). Two groups of chassis (304) are transversely arranged on the outer sides of the two groups of side plates (301). The chassis (304) is a C-shaped bent rod with an upward opening, and the two ends of the chassis (304) are respectively fixed to the outside of the two groups of side plates (301).

9. The positioning and cutting device for express delivery packaging bags according to claim 8, wherein: The compression stroke of the spring (207) is greater than the distance between the locking teeth (206) and the toothed belt (6). The length of the locking teeth (206) is greater than the width of the toothed belt (6). The length of the cutting knife (204) is greater than the thickness of the toothed belt (6).

10. The method for using the positioning and cutting device for express delivery packaging bags according to claim 9, characterized in that, It includes the following steps: a. When it is necessary to punch and cut the express delivery packaging bag, place the express delivery packaging bag on the top side of the conveyor belt (7) along the side away from the motor (4). Drive the transmission belt (402) to rotate through the motor (4). Transmit the power of the motor (4) to the longitudinal shaft (501) through the transmission belt (402). At this time, the belt wheels (5) connecting the two longitudinal shafts (501) support the toothed belt (6) to rotate clockwise; b. At the same time, the driving gear (502) on the longitudinal shaft (501) drives the transmission gear (305) on the rotating shaft (302) of the conveyor (3) to rotate. At this time, the rotating shaft (302) and the guide roller (303) rotate counterclockwise. Use the guide roller (303) to support the conveyor belt (7) to rotate counterclockwise. The bottom side of the toothed belt (6) and the top side of the conveyor belt (7) both rotate towards the direction close to the motor (4). At the same time, the conveyor belt (7) supports the packaging bag to be punched and moves it to the bottom side of the slider (2) to realize the conveying action of the packaging bag; c. When the packaging bag moves to the bottom side of the slider (2), extend the telescopic end of the air cylinder (201) to drive the guide rod (202) and the synchronous plate (205) to move downward. The locking teeth (206) on the bottom side of the synchronous plate (205) first contact and mesh with the rotating toothed belt (6). Use the toothed belt (6) to drive the locking teeth (206) to drive the synchronous plate (205), the guide rod (202), and the slider (2) to move horizontally along the chute (101). At this time, the slider (2) and the bottom side of the toothed belt (6) and the top side of the conveyor belt (7) perform synchronous sliding in the same direction; d. The slider (2) realizes synchronous sliding along with the packaging bag moving on the top side of the conveyor belt (7) through the meshing action between the bottom teeth (206) of the slider (2) and the toothed belt (6). Then, the telescopic end of the air cylinder (201) continuously extends to drive the fixed disk (203) and the cutting knife (204) to continuously move downward. At this time, the synchronous plate (205) maintains the state of being tightly engaged and driven with the toothed belt (6), and then the packaging bag on the top side of the conveyor belt (7) is pressed and cut by the downward-moving cutting knife (204). e. After completing one cutting action, the telescopic end of the air cylinder (201) contracts, the synchronous plate (205) is separated from the toothed belt (6), and the pulling and moving state of the toothed belt (6) on the synchronous plate (205) is released. Then, the slider (2) is supported by the compressed state of the compression spring (208a) to reset along the chute (101), so as to prepare for the next cutting action.

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