A carton paper feeding section with a paper separating mechanism

Abstract

This invention provides a carton feeding unit with a paper-slitting mechanism, including a baffle assembly, a support assembly, a conveying assembly, and a paper-slitting blade assembly. Several cardboard sheets are stacked between the support assembly and the baffle assembly. The support assembly and the baffle assembly abut against the rear ends and sides of all the cardboard sheets, and also abut against the front ends of all the cardboard sheets except the bottom one. The conveying assembly conveys the bottom cardboard sheet forward. The paper-slitting blade assembly is positioned directly above the conveying assembly and is used to cut the cardboard sheets conveyed by the conveying assembly. This invention, by adding a small paper-slitting device, achieves automatic paper-slitting, printing, and die-cutting of cardboard, solving the problems of low efficiency in manual paper-slitting and wear and tear on the rubber pads caused by die-cutting. It is also easily retrofitted and promoted on existing equipment.

Description

Technical Field

[0001] This invention relates to the field of cardboard box manufacturing technology, specifically to a cardboard box paper feeding unit with a paper separating mechanism. Background Technology

[0002] In the existing cardboard box production process, the paper feeding department is responsible for feeding the cardboard into the printing and die-cutting processes. However, traditional equipment has the following shortcomings: 1. Low efficiency of manual paper cutting: To meet the production needs of "one-to-many" (i.e., dividing a large cardboard sheet into multiple small cartons), the cardboard usually needs to be manually cut to the required size before being fed into the paper feeding section for printing and die-cutting. This not only increases labor costs but also reduces production efficiency and is prone to cardboard waste due to operational errors.

[0003] 2. Paper cutting section causes wear on the rubber pad: Some equipment attempts to install a die-cutting plate in the die-cutting section for paper separation, but this method will accelerate the wear of the die-cutting rubber pad, resulting in frequent equipment maintenance, increased production costs, and affecting die-cutting accuracy and product quality.

[0004] Therefore, we propose an improved paper feeding unit for cartons with a paper separating mechanism. Summary of the Invention

[0005] The purpose of this invention is to improve and innovate upon the shortcomings and problems existing in the prior art, and to provide a carton feeding part with a paper-splitting mechanism. By adding a small paper-splitting device, the automatic paper-splitting, printing and die-cutting of the cardboard can be integrated, solving the problems of low efficiency of manual paper-splitting and loss of rubber pads caused by die-cutting. At the same time, it can meet the production needs of "one-to-many" and double-row gluing of boxes.

[0006] A carton paper feeding unit with a paper separating mechanism includes: baffle assembly; A support assembly, wherein several cardboard pieces are stacked between the support assembly and the baffle assembly, the support assembly and the baffle assembly being used to abut against the rear ends and sides of all the cardboard pieces, and also abut against the front ends of the remaining cardboard pieces except for the bottommost cardboard piece; A conveying assembly for conveying the bottommost cardboard forward; The paper slitting blade assembly is positioned directly above the conveying assembly and is used to cut the cardboard conveyed by the conveying assembly.

[0007] A further embodiment includes a first fixing plate, on which a first motor is mounted. A first mounting plate is rotatably connected to the outer surface of the output shaft of the first motor via a bearing. An arc-shaped groove is formed at the end of the first fixing plate away from the first motor. A circular blade is rotatably connected to the end of the first mounting plate away from the first motor. The output shaft of the first motor drives the circular blade to rotate via a second transmission mechanism. The ends of the first mounting plate and the first fixing plate away from the first motor are fixedly connected together by fastening bolts, and the arc-shaped groove is for the threaded rod of the fastening bolt to pass through.

[0008] A further embodiment is that a connecting plate is fixedly connected to the first mounting plate, a cylinder is mounted on the connecting plate, a movable plate is fixedly connected to the output end of the cylinder, and two bushings are mounted on the movable plate. A grinding wheel is rotatably connected to each of the two bushings, and the two bushings are respectively tilted upward and downward so that when the cylinder extends, the grinding wheels corresponding to the two bushings can simultaneously contact the inner and outer sides of the circular cutter.

[0009] A further embodiment is that the baffle assembly includes vertical beams, with a horizontal beam between the vertical beams. A second motor is mounted on the vertical beams, and a first lead screw is fixedly connected to the output end of the second motor. A first guide rail is mounted on the horizontal beam, and a front baffle is slidably fitted to the first guide rail via a slider. The first lead screw passes through the front baffle and is threadedly connected to it. The front baffle is used to abut against the front ends of the remaining cardboard except for the bottom layer cardboard.

[0010] A further embodiment includes a third motor, the output end of which is fixedly connected to a second lead screw. The middle part of the second lead screw passes through the side baffle and is threadedly connected to it. The side baffle is also slidably engaged with the first guide rail via a slider. The side baffle is used to abut against both sides of the cardboard.

[0011] A further embodiment is that the conveying assembly includes several fourth motors, and several rollers are spaced apart on the output shaft of the fourth motors. The rollers are staggered along the conveying direction of the cardboard, and the rollers are used to convey and support the cardboard.

[0012] A further embodiment is that the support assembly includes a rear baffle, a lifting mechanism, and a moving mechanism. The bottom end of the rear baffle is provided with a step portion, which is used to support the lower surface of the cardboard. The lifting mechanism is used to drive the rear baffle to move up and down. The moving mechanism is used to drive the rear baffle to move back and forth.

[0013] A further embodiment is that the moving mechanism includes a sixth motor, which is mounted on a second mounting plate. The output end of the sixth motor drives a third gear to rotate through a gear transmission mechanism. The third gear is meshed with a rack, which is mounted on a longitudinal beam. A second guide rail that is slidably fitted onto the second mounting plate is mounted on the longitudinal beam, and the second mounting plate is connected to the rear baffle.

[0014] A further option is that the roller includes a rubber roller and / or a ceramic roller.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) By adding a small paper-splitting device, the present invention can realize the automatic paper-splitting, printing and die-cutting of paperboard, solve the problems of low efficiency of manual paper-splitting and loss of rubber pads caused by die-cutting, and is easy to modify and promote on existing equipment. (2) The present invention abuts against the rear end and sides of all cardboards by the support component and the baffle component, and also abuts against the front end of the remaining cardboards except the bottom cardboard; when the conveying component conveys the bottom cardboard forward, the cardboard that was originally above the bottom cardboard and in the second to last bottom position will fall naturally under its own weight because it loses the support of the cardboard below, so that the conveying component can convey the single cardboard forward in sequence; (3) The position of the circular blade can be adjusted by rotating the first mounting plate, which makes it convenient to adjust the blade depth according to the thickness of the cardboard and the cutting requirements; (4) By controlling the extension of the cylinder, the present invention can drive two grinding wheels to contact the inner and outer sides of the circular blade at the same time, thereby sharpening the blade edge and making the blade sharp, ensuring that the cardboard remains fast and stable during the slitting process. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a first-view structural schematic diagram of a paper feeding section of a carton with a paper separating mechanism provided in an embodiment of the present invention; Figure 2 This is a second-view structural schematic diagram of a carton paper feeding section with a paper separating mechanism provided in an embodiment of the present invention; Figure 3 This is a first-view structural schematic diagram of the conveying assembly and support assembly provided in an embodiment of the present invention; Figure 4This is a second-view structural schematic diagram of the conveying assembly and support assembly provided in an embodiment of the present invention; Figure 5 This is a third-view structural diagram of the conveying assembly and support assembly provided in an embodiment of the present invention; Figure 6 Provided by the embodiments of the present invention Figure 5 A magnified view of the structure at point A in the middle; Figure 7 This is a schematic diagram of the baffle assembly provided in an embodiment of the present invention; Figure 8 Provided by the embodiments of the present invention Figure 7 A magnified schematic diagram of the structure at point B in the middle; Figure 9 This is a front view of the paper-splitting blade assembly provided in an embodiment of the present invention. Figure 1 ; Figure 10 This is a front view of the paper-splitting blade assembly provided in an embodiment of the present invention. Figure 2 (Excluding the drive wheel and circular cutter); Figure 11 This is a rear view structural diagram of the paper-splitting blade assembly provided in an embodiment of the present invention.

[0018] Reference numerals: 1. Frame; 2. Paper-splitting blade assembly; 201. Fixed base; 202. First fixed plate; 2021. Arc groove; 203. First motor; 204. Protective cover; 205. First mounting plate; 206. Drive wheel; 207. Synchronous belt; 208. Driven wheel; 209. Circular blade; 210. Grinding wheel; 211. Grinding wheel shaft; 212. Bushing; 213. Connecting plate; 214. Cylinder; 215. Movable plate; 3. Baffle assembly; 301. Vertical beam; 302. Horizontal beam; 303. Second motor; 304. First lead screw; 305. Front baffle; 306. First guide rail; 307. ... 3. Motor; 308. Second lead screw; 309. Side baffle; 4. Conveying assembly; 401. Longitudinal beam; 402. Roller mounting plate; 403. Roller; 404. Fourth motor; 405. Notch; 5. Support assembly; 501. Rear baffle; 5011. Step section; 502. Second mounting plate; 503. Fifth motor; 504. First drive shaft; 505. First transmission mechanism; 506. Lifting rod; 507. Sixth motor; 508. Third mounting plate; 509. First gear; 510. Second gear; 511. Second drive shaft; 512. Third gear; 513. Rack; 514. Second guide rail. Detailed Implementation

[0019] To make the objectives, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Please see Figure 1-2 The present invention provides a carton paper feeding unit with a paper separating mechanism, comprising: Rack 1; Baffle assembly 3; Support component 5, between which several cardboard pieces to be divided are stacked, support component 5 and baffle component 3, support component 5 and baffle component 3 are used to abut against the rear ends and sides of all cardboard pieces, and at the same time, also abut against the front ends of the remaining cardboard pieces except the bottom cardboard piece; The conveying assembly 4 is used to convey the bottommost cardboard forward; wherein the baffle assembly 3, the support assembly 5 and the conveying assembly 4 are all disposed on the frame 1.

[0022] Paper slitting blade assembly 2 is located directly above the conveying assembly 4 and is used to cut the cardboard conveyed by the conveying assembly 4.

[0023] Understandably, when the conveying component 4 conveys the bottommost cardboard forward, the cardboard that was originally above the bottommost cardboard and in the second-to-last position will naturally fall down under its own weight because it loses the support of the cardboard below. This allows the conveying component 4 to convey individual cardboard sheets forward in sequence. Since the paper-splitting blade assembly 2 is located directly above the conveying component 4, it can automatically separate the paper in the feeding section, avoiding the use of a die-cutting mold in the die-cutting section. This significantly reduces the wear of the die-cutting pad and extends the service life of the equipment.

[0024] Please see Figures 3-6The conveying assembly 4 includes several fourth motors 404, which are mounted on longitudinal beams 401. A roller mounting plate 402 is installed between two longitudinal beams 401. Several rollers 403 are spaced apart on the output shaft of each fourth motor 404. The rollers 403 can be rubber or ceramic wheels, and they are staggered along the conveying direction of the cardboard. The upper ends of the rollers 403 pass through the roller mounting plate 402 and extend above it, enabling them to convey and support the front end of the cardboard. When the fourth motor 404 is started, it drives the rollers 403 to rotate. Under the friction between the rollers 403 and the cardboard, the rollers 403 propel the bottom layer of cardboard forward into the printing and die-cutting process.

[0025] It should be noted that the roller mounting plate 402 has a notch 405 corresponding to the circular knife 209. The notch 405 facilitates the circular knife 209 to pass through the roller mounting plate 402. In this way, when the cardboard is conveyed forward, the circular knife 209 can completely cut the cardboard, realizing the "one-to-many" operation of the cardboard.

[0026] It should be further explained that the space between the roller mounting plate 402 and the longitudinal beam 401 can be connected to the exhaust fan. During the paper cutting process of the paper cutting blade assembly 2, the generated paper scraps enter the space below the roller mounting plate 402 through the gap between the roller 403 and the roller mounting plate 402, and are sucked in by the exhaust fan; thus facilitating the cleaning of paper scraps generated during the paper cutting process. More importantly, under the action of the exhaust fan, a negative pressure is formed in the space between the roller mounting plate 402 and the longitudinal beam 401, resulting in the air pressure on the upper surface of the paperboard being greater than the air pressure on its lower surface, thereby pressing the paperboard tightly onto the roller 403, so that the friction between the roller 403 and the paperboard is sufficient to transport the paperboard forward; secondly, the paperboard is less likely to deviate during the forward transport process.

[0027] Please continue reading. Figures 3-6The support assembly 5 includes a rear baffle 501, a second mounting plate 502, a lifting mechanism, and a moving mechanism. The rear baffle 501 has a step 5011 at its bottom end, which supports the rear end of the lower surface of the cardboard. The second mounting plate 502 is positioned between two longitudinal beams 401. The moving mechanism drives the second mounting plate 502 to move back and forth relative to the longitudinal beams 401 along its length. The second mounting plate 502 is connected to the rear baffle 501 via the lifting mechanism. Therefore, when the second mounting plate 502 moves back and forth relative to the longitudinal beams 401, it drives the rear baffle 501 to move back and forth, adjusting the distance between the step 5011 and the conveying assembly 4 at the front end of the longitudinal beams 401. This facilitates the support of cardboard of different lengths, improving the applicability of the device. The lifting mechanism allows the rear baffle 501 to move up and down, facilitating the adjustment of the height of the step 5011 to be flush with the height of the rollers 403.

[0028] Optionally, the moving mechanism includes a sixth motor 507, which is mounted on a third mounting plate 508, which is mounted on the lower surface of a second mounting plate 502. The output of the sixth motor 507 drives a third gear 512 to rotate via a gear transmission mechanism, and there are two third gears 512. The third gear 512 meshes with a rack 513, which is mounted on a longitudinal beam 401. Second guide rails 514, which slide and engage with both sides of the second mounting plate 502, are mounted on the longitudinal beam 401. The gear transmission mechanism includes a first gear 509, which is mounted on the output of the sixth motor 507 and meshes with a second gear 510. The second gear 510 is mounted in the middle of a second drive shaft 511, while the third gear 512 is mounted at both ends of the second drive shaft 511, and the middle of the second drive shaft 511 is rotatably connected to the third mounting plate 508. After the sixth motor 507 is started, the sixth motor 507 drives the two third gears 512 to rotate through the gear transmission mechanism. Since the rack 513 is fixed on the longitudinal beam 401, under the reverse action of the rack 513, it will drive the moving mechanism to move along the length direction of the longitudinal beam 401, thereby driving the second mounting plate 502 and the rear baffle 501 to move back and forth as a whole.

[0029] Optionally, the lifting mechanism includes a fifth motor 503, the output end of which is fixedly connected to a first transmission shaft 504. The first transmission shaft 504 cooperates with a lifting rod 506 through a first transmission mechanism 505, and the top end of the lifting rod 506 is connected to the rear baffle 501. The first transmission mechanism 505 may include two meshing bevel gears and a threaded sleeve. After the fifth motor 503 is started, the fifth motor 503 drives the threaded sleeve to rotate through the first transmission shaft 504. The inner surface of the threaded sleeve is threadedly connected to the bottom end of the lifting rod 506, thereby driving the lifting rod 506 to move up and down to adjust the height position of the step 5011. It should be noted that the lifting mechanism can also directly use an electric telescopic rod to drive the rear baffle 501 to move up and down. Those skilled in the art can determine this according to the actual situation. This application does not make specific limitations, and any lifting mechanism that can drive the rear baffle 501 to move up and down is within the protection scope of this application.

[0030] Please see Figures 7-8 The baffle assembly 3 includes vertical beams 301, with horizontal beams 302 positioned between them. Both the vertical beams 301 and the horizontal beams 302 are part of the frame 1. A second motor 303 is mounted on the vertical beams 301, and a first lead screw 304 is fixedly connected to the output end of the second motor 303. A first guide rail 306 is mounted on the horizontal beams 302, and two front baffles 305 are slidably fitted onto the first guide rail 306 via a slider. The first lead screw 304 passes through and is threadedly connected to the front baffle 305, which abuts against the front ends of all cardboard sheets except the bottom layer. Therefore, when the bottom layer cardboard is conveyed forward under the frictional force between the roller 403 and the bottom layer cardboard, the front baffles 305 prevent cardboard sheets in other layers from following the bottom layer, ensuring that only one sheet of cardboard is conveyed at a time. This facilitates the paper-cutting blade assembly 2 cutting each sheet of cardboard sequentially. Understandably, by rotating the first lead screw 304, the distance between the front baffles 305 can be adjusted, making it easier to hold the front end of cardboard of different widths, thus further improving the applicability of the paper feeding unit.

[0031] In some preferred embodiments, the baffle assembly 3 further includes a third motor 307, the output end of which is fixedly connected to a second lead screw 308. The middle portion of the second lead screw 308 passes through and is threadedly connected to the side baffle 309, and the side baffle 309 is also slidably engaged with the first guide rail 306 via a slider. Two side baffles 309 are provided, positioned on opposite sides of the cardboard to abut against the sides of the cardboard. It is understood that by rotating the second lead screw 308, the distance between the two side baffles 309 can be easily adjusted, thereby facilitating abutment against the sides of cardboard of different widths.

[0032] Please see Figure 2 and Figures 9-11 The paper-splitting blade assembly 2 includes a first fixing plate 202, which is mounted on a crossbeam 302 via a fixing seat 201. A first motor 203 is mounted on the first fixing plate 202, and a first mounting plate 205 is rotatably connected to the outer surface of the output shaft of the first motor 203. Preferably, the output shaft of the first motor 203 is interference-fitted with the inner ring of a bearing, and the outer ring of the bearing is mounted on the first mounting plate 205, allowing the first mounting plate 205 to rotate relative to the output shaft of the first motor 203. An arc-shaped groove 2021 is formed at the end of the first fixing plate 202 away from the first motor 203, and multiple arc-shaped grooves 2021 can be formed; preferably, three arc-shaped grooves 2021 are formed. The ends of the first mounting plate 205 and the first fixing plate 202 away from the first motor 203 are fixedly connected together by fastening bolts, and the arc-shaped groove 2021 is for the thread of the fastening bolt to pass through. A circular blade 209 is rotatably connected to the end of the first mounting plate 205 away from the first motor 203, and the output shaft of the first motor 203 drives the circular blade 209 to rotate via a second transmission mechanism. Preferably, the second transmission mechanism includes a drive wheel 206, a synchronous belt 207, and a driven wheel 208. The drive wheel 206 is connected to the output end of the first motor 203, and the driven wheel 208 is mounted on the corresponding blade shaft of the circular blade 209. The drive wheel 206 is connected to the driven wheel 208 via the synchronous belt 207. This design facilitates the rotation of the circular blade 209 by the first motor 203 to cut the cardboard. Furthermore, after removing the bolts, the blade depth can be adjusted according to the cardboard thickness and slitting requirements. Rotating the first mounting plate 205 does not affect the rotation of the driven wheel 208 via the synchronous belt 207. The rotation of the first mounting plate 205 adjusts the position of the circular blade 209, allowing for easy adjustment of the blade depth based on the cardboard thickness and slitting requirements. It should be noted that by opening the arc-shaped groove 2021, the fastening bolt can still pass through the arc-shaped groove 2021 after the first mounting plate 205 is rotated, so that the first mounting plate 205 and the end of the first fixing plate 202 away from the first motor 203 can still be fixedly connected by the fastening bolt.

[0033] In some preferred embodiments, the first mounting plate 205 and the first fixing plate 202 are provided with a plurality of bolt holes arranged in a ring array, and these bolt holes are arranged in a ring array around the output shaft of the first motor 203, so that after rotating the first mounting plate 205, the first mounting plate 205 and the first fixing plate 202 can be fixedly connected to the end of the first motor 203 by fastening bolts.

[0034] Preferably, a protective cover 204 is installed on the first fixing plate 202, which serves to cover the outside of the circular knife 209.

[0035] Please continue reading. Figures 9-11 A connecting plate 213 is fixedly connected to the first mounting plate 205, and a cylinder 214 is mounted on the connecting plate 213. A movable plate 215 is fixedly connected to the output end of the cylinder 214, and two bushings 212 are mounted on the movable plate 215. A grinding wheel 210 is rotatably connected to each of the two bushings 212. Preferably, a bearing is interference-fitted to the inner ring of the bushing 212, and the inner ring of the bearing is interference-fitted to the outer surface of the grinding wheel shaft 211. The two bushings 212 are respectively inclined upward and downward, so that when the cylinder 214 extends, the grinding wheels 210 corresponding to the two bushings 212 can simultaneously contact the inner and outer sides of the circular cutter 209. Therefore, after the control cylinder 214 extends, the cylinder 214 will drive the two grinding wheels 210 to simultaneously contact the inner and outer sides of the circular blade 209, respectively, to sharpen the blade edge, making the circular blade 209 sharp and ensuring that the cardboard remains fast and stable during the slitting process.

[0036] The working process of this invention is as follows: Several pieces of cardboard to be divided are stacked between the support assembly 5 and the baffle assembly 3. The distance between the rear baffle 501 and the conveying assembly 4 is adjusted by the support assembly 5 to make the distance between the rear baffle 501 and the conveying assembly 4 suitable for the length of the cardboard. The distance between the two front baffles 305 is adjusted by the baffle assembly 3 to make the two front baffles 305 better abut against the front end of the cardboard. The distance between the two side baffles 309 is adjusted by the baffle assembly 3 to make the distance between the two side baffles 309 suitable for the width of the cardboard. Then, the bottom layer of cardboard is conveyed forward by the conveying assembly 4. After the bottom layer of cardboard is conveyed forward, the cardboard that was originally above the bottom layer and in the second-to-last position will fall naturally under its own weight because it loses the support of the cardboard below. This allows the conveying assembly 4 to convey individual cardboard sheets forward in sequence. Since the paper-slitting blade assembly 2 is located directly above the conveying assembly 4, it can automatically cut the conveyed cardboard, avoiding the use of a die-cutting mold in the die-cutting section. This significantly reduces the wear of the die-cutting pad and extends the service life of the equipment. In addition, the present invention allows the position of the circular blade 209 to be adjusted by rotating the first mounting plate 205, which facilitates the adjustment of the blade depth according to the cardboard thickness and cutting requirements. By controlling the extension of the cylinder 214, the two grinding wheels 210 will simultaneously contact the inner and outer sides of the circular blade 209, respectively, to sharpen the blade edge and make the blade of the circular blade 209 sharp, ensuring that the cardboard remains fast and stable during the cutting process.

[0037] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims. Parts not described in detail in this specification are prior art known to those skilled in the art.

Claims

1. A cardboard box feeding unit with a paper separating mechanism, characterized in that, include: baffle assembly (3); Support component (5), a number of cardboards are stacked between the support component (5) and the baffle component (3), the support component (5) and the baffle component (3) are used to abut against the rear end and sides of all cardboards, and at the same time, they also abut against the front end of the remaining cardboards except the bottom cardboard; Conveying assembly (4), the conveying assembly (4) being used to convey the bottommost cardboard forward; Paper cutting blade assembly (2), which is located directly above the conveying assembly (4), is used to cut the cardboard conveyed by the conveying assembly (4).

2. The paper feeding unit for a carton with a paper separating mechanism according to claim 1, characterized in that: The paper-splitting blade assembly (2) includes a first fixing plate (202), on which a first motor (203) is mounted. The outer surface of the output shaft of the first motor (203) is rotatably connected to a first mounting plate (205) via a bearing. An arc-shaped groove (2021) is provided at one end of the first fixing plate (202) away from the first motor (203). A circular blade (209) is rotatably connected at one end of the first mounting plate (205) away from the first motor (203). The output shaft of the first motor (203) drives the circular blade (209) to rotate via a second transmission mechanism. The ends of the first mounting plate (205) and the first fixing plate (202) away from the first motor (203) are fixedly connected together by fastening bolts. The arc-shaped groove (2021) is for the screw of the fastening bolt to pass through.

3. A carton paper feeding unit with a paper separating mechanism according to claim 2, characterized in that: A connecting plate (213) is fixedly connected to the first mounting plate (205). A cylinder (214) is installed on the connecting plate (213). A movable plate (215) is fixedly connected to the output end of the cylinder (214). Two bushings (212) are installed on the movable plate (215). A grinding wheel (210) is rotatably connected to each of the two bushings (212). The two bushings (212) are tilted upward and downward respectively, so that after the cylinder (214) is extended, the grinding wheels (210) corresponding to the two bushings (212) can simultaneously contact the inner and outer sides of the circular knife (209).

4. A carton paper feeding unit with a paper separating mechanism according to claim 1, characterized in that: The baffle assembly (3) includes vertical beams (301), and a crossbeam (302) is provided between the vertical beams (301). A second motor (303) is installed on the vertical beams (301), and a first lead screw (304) is fixedly connected to the output end of the second motor (303). A first guide rail (306) is installed on the crossbeam (302), and a front baffle (305) is slidably fitted to the first guide rail (306) through a slider. The first lead screw (304) passes through the front baffle (305) and is threadedly connected to it. The front baffle (305) is used to abut against the front end of the remaining cardboard except for the bottom cardboard.

5. A carton paper feeding unit with a paper separating mechanism according to claim 4, characterized in that: The baffle assembly (3) also includes a third motor (307), the output end of which is fixedly connected to a second lead screw (308). The middle part of the second lead screw (308) passes through the side baffle (309) and is threadedly connected to it. The side baffle (309) is also slidably engaged with the first guide rail (306) through a slider. The side baffle (309) is used to abut against both sides of the cardboard.

6. A carton paper feeding unit with a paper separating mechanism according to claim 1, characterized in that: The conveying assembly (4) includes several fourth motors (404), and several rollers (403) are spaced apart on the output shaft of the fourth motors (404). The rollers (403) are staggered along the conveying direction of the cardboard, and the rollers (403) are used to convey and support the cardboard.

7. A carton paper feeding unit with a paper separating mechanism according to claim 1, characterized in that: The support assembly (5) includes a rear baffle (501), a lifting mechanism and a moving mechanism. The bottom end of the rear baffle (501) is provided with a step (5011), which is used to support the lower surface of the cardboard. The lifting mechanism is used to drive the rear baffle (501) to move up and down. The moving mechanism is used to drive the rear baffle (501) to move back and forth.

8. A carton paper feeding unit with a paper separating mechanism according to claim 7, characterized in that: The moving mechanism includes a sixth motor (507), which is mounted on a second mounting plate (502). The output end of the sixth motor (507) drives a third gear (512) to rotate through a gear transmission mechanism. The third gear (512) is meshed with a rack (513), which is mounted on a longitudinal beam (401). A second guide rail (514) that is slidably fitted onto the second mounting plate (502) is mounted on the longitudinal beam (401). The second mounting plate (502) is connected to the rear baffle (501).

9. A carton paper feeding unit with a paper separating mechanism according to claim 6, characterized in that: The roller (403) includes a rubber roller and / or a ceramic roller.

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