An automatic carton sealing and pasting machine and method

Abstract

The application relates to the technical field of carton packaging, and discloses an automatic carton sealing and pasting machine and method, which solves the problems that when the carton is large, the manual carton sealing and pasting mode is time-consuming, the packaging efficiency is low, and there is a certain limitation, and the automatic carton sealing and pasting machine comprises a base, a movable seat arranged above the base, a hydraulic telescopic rod connecting the base and the movable seat, a supporting table arranged above the movable seat, a paperboard positioning mechanism arranged on the supporting table, a first supporting plate connecting the supporting table and the base, a centering plate arranged on each side of the supporting table, a centering driver connecting the supporting table and the two centering plates, a glue outlet arranged on one side of one of the centering plates, a straight-line applicator connecting the glue outlet and the centering plate, a top plate arranged on each side of the supporting table, the bottom end of the top plate being fixedly connected with the movable seat, and a sliding plate arranged on each side of the movable seat; the automatic carton sealing and pasting machine is convenient for carton sealing and pasting, reduces the working strength of the staff, and improves the working efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of carton packaging, and particularly relates to an automatic carton sealing and box pasting machine and method. BACKGROUND

[0002] At present, paper box forming processing modes mainly include three categories of nailing forming, bonding forming and folding forming. In a conventional bonding forming processing, the two ends of a paperboard need to be bonded together so that the paperboard can be folded into a carton. However, the inventor finds that the conventional packing, sealing and box pasting mode is mostly performed by manpower. When the carton is large, the packing and box pasting mode performed by manpower is time-consuming and low in packing efficiency, and has certain limitations. SUMMARY

[0003] In view of the above problems, the application provides an automatic carton sealing and box pasting machine and method to effectively solve the problem that the packing and box pasting mode performed by manpower is time-consuming and low in packing efficiency when the carton is large.

[0004] To achieve the above object, the application provides the following technical scheme: an automatic carton sealing and box pasting machine, comprising a base, a movable seat arranged above the base, a hydraulic telescopic rod connecting the base and the movable seat, a supporting table arranged above the movable seat, a paperboard positioning mechanism arranged on the supporting table, a first supporting plate connecting the supporting table and the base, a centering plate arranged on each side of the supporting table, a centering drive connecting the supporting table and the two centering plates, a glue outlet arranged on one side of one of the centering plates, a straight-line applicator connecting the glue outlet and the centering plate, a top plate arranged on each side of the supporting table, the top plate being fixedly connected to the bottom end of the movable seat, a sliding plate arranged on each side of the movable seat, a vertical elastic sliding unit connecting the sliding plate and the movable seat, a supporting frame fixedly connected to the sliding plate, a blocking strip fixedly connected to the bottom of the supporting table and matched with the supporting frame, a side pushing plate penetrating through the sliding plate, a through hole matched with the side pushing plate arranged on the top plate, and a side pushing gear mechanism connecting the top plate and the side pushing plate.

[0005] Preferably, the side pushing gear mechanism comprises first gear racks fixedly installed on the two sides of the side pushing plate, two installation holes arranged on the sliding plate, adjacent two first gear racks penetrating through adjacent two installation holes, a first gear wheel arranged in each installation hole and engaged with the first gear rack, a rotating shaft fixedly connected to one side of the first gear wheel and penetrating through the sliding plate, a second gear wheel fixedly connected to the end of the rotating shaft away from the first gear wheel, a second gear rack arranged on one side of the second gear wheel, and a first supporting part connecting the second gear rack and the top plate.

[0006] Preferably, the vertical elastic sliding unit comprises guide blocks fixedly installed on both sides of the movable seat respectively, a guide groove is formed on the sliding plate, the guide blocks are located in the guide groove, one side of the sliding plate is fixedly connected with a second supporting plate, and the top of the second supporting plate and the bottom of the movable seat are connected through a tension spring.

[0007] Preferably, the paperboard positioning mechanism comprises two first single-shaft motors arranged on one side of the supporting table, the first single-shaft motor and the supporting table are connected through a first motor base, the output end of the first single-shaft motor is fixedly connected with a positioning plate, one side of the supporting table is provided with a second single-shaft motor, the second single-shaft motor and the supporting table are connected through a second motor base, and the output end of the second single-shaft motor is fixedly connected with a pressing plate.

[0008] Preferably, the centering driver comprises double-shaft motors fixedly installed on both sides of the supporting table respectively, the two output ends of the double-shaft motor are fixedly connected with first lead screws respectively, the thread directions of the adjacent two first lead screws are opposite, the first lead screw is externally sleeved with a threaded sleeve, and the end, away from the double-shaft motor, of the threaded sleeve is fixedly connected with a corresponding centering plate.

[0009] Preferably, the first lead screw is externally sleeved with a second supporting portion, the first lead screw and the second supporting portion are connected through a bearing, and one side of the second supporting portion is fixedly connected with the supporting table.

[0010] Preferably, the two centering plates are both provided with a supporting plate on the side close to each other, and the supporting plate and the centering plate are connected through a connecting frame.

[0011] Preferably, the straight-line applicator comprises a movable frame fixedly installed on the glue outlet head, a second lead screw is threaded through the movable frame, one of the centering plates is fixedly connected with a third motor base and a third supporting portion respectively, one end of the second lead screw is connected with the third motor base through a third single-shaft motor, the other end of the second lead screw is connected with the third supporting portion through a bearing, a positioning column is threaded through the movable frame, and the positioning column and the centering plate are connected through a connecting plate.

[0012] Preferably, a groove is formed in the supporting table, and a plurality of supporting rollers are rotatably arranged in the groove.

[0013] The application also provides an automatic carton sealing and pasting method, which comprises the automatic carton sealing and pasting machine and comprises the following steps.

[0014] In step one, the glue outlet head is connected with an external glue outlet device through a hose, workers place paperboards that need to be sealed and pasted on the supporting table, the two centering plates are driven to move close to each other at the same time through the centering driver, the paperboards are moved through the two centering plates, and the paperboards are centrally placed.

[0015] Step two: the middle position of the paperboard is fixed by the paperboard positioning mechanism, so that the paperboard is fixed on the support table, the glue head is driven to move by the straight-line applicator, so that the glue head applies glue to one end of the paperboard;

[0016] Step three: when the application is completed, the hydraulic telescopic rod drives the movable seat to move upwards, so that the two top plates push the two ends of the paperboard to vertically stand up;

[0017] Step four: when the two ends of the paperboard vertically stand up, the bottom of the support frame and the blocking strip are in contact, the top plate continuously moves upwards, and the sliding plate stops moving upwards with the movable seat;

[0018] Step five: when the sliding plate stops moving and the top plate continuously moves upwards, the top plate drives the side pushing plate to slide relative to the sliding plate through the side pushing tooth driving mechanism, the side pushing plate penetrates through the through hole, the two side pushing plates move close to each other, and the two ends of the paperboard are folded to the middle position of the paperboard through the two side pushing plates;

[0019] Step six: during the movement of the two side pushing plates, the side pushing plate on the side close to the glue head first contacts the paperboard, so that the end of the paperboard with glue is first folded to the middle position of the paperboard, the end of the paperboard without glue is pressed on the end of the paperboard with glue, so that the two ends of the paperboard are bonded together, the paperboard positioning mechanism is used again to release the fixation of the good carton, and the worker takes down the carton.

[0020] Compared with the prior art, the beneficial effects of the present application are:

[0021] (1) The glue dispensing head is connected to an external glue dispensing device via a hose. The worker places the cardboard to be sealed on the support platform. The centering driver drives two centering plates to move closer to each other simultaneously. The two centering plates push the cardboard to move, so that the cardboard is centered. The cardboard positioning mechanism fixes the middle position of the cardboard, so that the cardboard is fixed on the support platform. The straight applicator drives the glue dispensing head to move so that the glue dispensing head applies glue to one end of the cardboard. After the application is completed, the hydraulic telescopic rod drives the movable seat to move upward, so that the two top plates push the two ends of the cardboard vertically. When the two ends of the cardboard are vertically upright, the bottom of the support frame and the baffle contact each other. The top plates continue to move upward, and the slide stops following. As the movable seat moves upward, the top plate continues to move upward. The top plate drives the side push plate to slide relative to the slide plate through the side push gear mechanism. The side push plate passes through the through hole, and the two side push plates move closer to each other. The two side push plates push the two ends of the cardboard to fold to the middle position of the cardboard. Among them, the side push plate closer to the glue outlet first contacts the cardboard, so that the glued end of the cardboard is folded to the middle position of the cardboard first, so that the un-glueed end of the cardboard is pressed on the glued end of the cardboard, so that the two ends of the cardboard are glued together. Then, the cardboard positioning mechanism releases the fixation of the glued carton, and the workers take off the carton, which makes it convenient to pack and glue the carton, reducing the labor intensity of the workers and improving work efficiency.

[0022] (2) When the bottom of the support frame and the stop bar are in contact, the movable seat and the top plate continue to move upward, the slide plate remains stationary, the distance between the second support plate and the movable seat increases, the tension spring is in a stretched state, and the guide block slides in the guide groove. The top plate drives the first support part and the second rack to move upward, the second rack drives the second gear to rotate, the second gear drives the first gear to rotate through the rotating shaft, and the first gear drives the first rack and the side push plate to move horizontally.

[0023] (3) The staff places the cardboard to be sealed and glued on the support platform. The two first single-axis motors drive the two positioning plates to rotate so that the two positioning plates press the middle position of the cardboard and fix the middle position of the cardboard. After the two ends of the cardboard are glued together, the second single-axis motor drives the pressure plate to rotate and press the connection between the two ends of the cardboard so that the two ends of the cardboard are glued more firmly. After the gluing is finished, the second single-axis motor drives the pressure plate to rotate in the opposite direction so that the pressure plate no longer presses the cardboard. The first single-axis motor drives the positioning plate to rotate in the opposite direction so that the glued cardboard stands up and the staff can grab the cardboard. The staff drives the upright cardboard to move upward so that the cardboard is removed from the positioning plate and the cardboard can be removed after the gluing is finished.

[0024] (4), by double shaft motor drive adjacent two first screw rotation, change the length of the first screw in the thread sleeve, to make the center plate moves, through the design of the second support and bearing, to make the first screw relative to the support table smoothly rotating, through the design of the supporting plate and connecting frame, support the two ends of the paperboard, reduce the possibility of paperboard bending;

[0025] (5), through the design of the positioning column and connecting plate, limit the horizontal sliding track of the movable frame, to make the movable frame and the glue head move smoothly in the horizontal direction, the third single shaft motor drives the second screw to rotate, through the second screw to drive the movable frame and the glue head to move horizontally, through the design of the groove and the supporting roller, the supporting roller supports the paperboard, reduces the resistance when the paperboard moves to the center, and facilitates the center plate to push the paperboard to move to the center. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are included to provide a further understanding of the application, and constitute a part of the specification, illustrate the application, and are used to explain the application, and do not constitute a limitation on the application.

[0027] In the drawings:

[0028] Figure 1 is one of the structure schematic diagram of the whole application;

[0029] Figure 2 is the second structure schematic diagram of the whole application;

[0030] Figure 3 is the structure schematic diagram of the straight-line applicator of the application;

[0031] Figure 4 is the structure schematic diagram of the support table of the application;

[0032] Figure 5 is the structure schematic diagram of the movable seat of the application;

[0033] Figure 6 is the structure schematic diagram of the application Figure 5 is a partial enlarged schematic view of A in the application;

[0034] Figure 7 is the structure schematic diagram of the top plate of the application;

[0035] Figure 8 is a partial structure schematic diagram of the sliding plate of the application.

[0036] In the figure: 1, base; 2, movable seat; 3, support table; 4, first support plate; 5, hydraulic telescopic rod; 6, centering plate; 7, glue outlet head; 8, top plate; 9, sliding plate; 10, side push plate; 11, through hole; 12, first rack; 13, first gear; 14, rotating shaft; 15, second gear; 16, second rack; 17, first support part; 18, support frame; 19, blocking strip; 20, guide block; 21, guide groove; 22, second support plate; 23, tension spring; 24, first single-shaft motor; 25, first motor seat; 26, positioning plate; 27, second single-shaft motor; 28, second motor seat; 29, pressing plate; 30, double-shaft motor; 31, first screw rod; 32, threaded sleeve; 33, second support part; 34, supporting plate; 35, connecting frame; 36, movable frame; 37, second screw rod; 38, positioning column; 39, third single-shaft motor; 40, third motor seat; 41, third support part; 42, connecting plate; 43, groove; 44, supporting roller; 45, mounting hole. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0038] Embodiment one, by Figures 1 to 8 It is given that the present application comprises a base 1, the upper part of the base 1 is provided with a movable seat 2, the base 1 and the movable seat 2 are connected through a hydraulic telescopic rod 5, the upper part of the movable seat 2 is provided with a support table 3, the support table 3 is provided with a paperboard positioning mechanism, the support table 3 and the base 1 are connected through a first support plate 4, the two sides of the support table 3 are respectively provided with a centering plate 6, the support table 3 and the two centering plates 6 are connected through a centering driver, one side of one of the centering plates 6 is provided with a glue outlet head 7, the glue outlet head 7 and the centering plate 6 are connected through a straight-line applicator, the two sides of the support table 3 are respectively provided with a top plate 8, the bottom end of the top plate 8 is fixedly connected with the movable seat 2, the two sides of the movable seat 2 are respectively provided with a sliding plate 9, the sliding plate 9 and the movable seat 2 are connected through a vertical elastic sliding unit, the sliding plate 9 is fixedly connected with a support frame 18, the bottom of the support table 3 is fixedly connected with a blocking strip 19 matched with the support frame 18, the sliding plate 9 is penetrated through with a side push plate 10, the top plate 8 is provided with a through hole 11 matched with the side push plate 10, and the top plate 8 and the side push plate 10 are connected through a side push gear mechanism.

[0039] Embodiment two, on the basis of embodiment one, by Figure 5 、 Figure 6 、 Figure 7 and Figure 8The side pushing gear mechanism comprises first racks 12 fixedly installed on both sides of the side pushing plate 10 respectively, two mounting holes 45 are formed on the sliding plate 9, two adjacent first racks 12 pass through the two adjacent mounting holes 45 respectively, first gears 13 meshing with the first racks 12 are arranged in the mounting holes 45, one side of the first gear 13 is fixedly connected with a rotating shaft 14, the rotating shaft 14 penetrates the sliding plate 9, one end of the rotating shaft 14 away from the first gear 13 is fixedly connected with a second gear 15, one side of the second gear 15 is provided with a second rack 16, the second rack 16 and the top plate 8 are connected through a first supporting part 17, and the vertical elastic sliding unit comprises guide blocks 20 fixedly installed on both sides of the movable seat 2 respectively.

[0040] When the bottom of the supporting frame 18 and the blocking strip 19 are in contact, the movable seat 2 and the top plate 8 continuously move upwards, the sliding plate 9 is stationary, the distance between the second supporting plate 22 and the movable seat 2 increases, the tensile spring 23 is in a tensile state, the guide block 20 slides in the guide groove 21, the top plate 8 drives the first supporting part 17 and the second rack 16 to move upwards, the second rack 16 drives the second gear 15 to rotate, the second gear 15 drives the first gear 13 to rotate through the rotating shaft 14, and the first gear 13 drives the first rack 12 and the side pushing plate 10 to move in the horizontal direction.

[0041] In example three, on the basis of example one, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The paperboard positioning mechanism comprises two first single-shaft motors 24 arranged on one side of the supporting table 3, the first single-shaft motor 24 and the supporting table 3 are connected through a first motor base 25, the output end of the first single-shaft motor 24 is fixedly connected with a positioning plate 26, one side of the supporting table 3 is provided with a second single-shaft motor 27, the second single-shaft motor 27 and the supporting table 3 are connected through a second motor base 28, the output end of the second single-shaft motor 27 is fixedly connected with a pressing plate 29, the centering driver comprises double-shaft motors 30 fixedly installed on both sides of the supporting table 3 respectively, the two output ends of the double-shaft motor 30 are fixedly connected with first lead screws 31 respectively, the threads on the two adjacent first lead screws 31 are opposite in direction, the first lead screw 31 is externally sleeved with a threaded sleeve 32, one end of the threaded sleeve 32 away from the double-shaft motor 30 is fixedly connected with the corresponding centering plate 6, the first lead screw 31 is externally sleeved with a second supporting part 33, the first lead screw 31 and the second supporting part 33 are connected through bearings, and one side of the second supporting part 33 is fixedly connected with the supporting table 3.

[0042] The worker places the paperboard that needs to be sealed and pasted into the box on the support table 3, rotates the two positioning plates 26 by driving the two first single-shaft motors 24 respectively, so that the two positioning plates 26 press the middle position of the paperboard, fixes the middle position of the paperboard through the positioning plate 26, rotates the pressing plate 29 by driving the second single-shaft motor 27 when the two ends of the paperboard are pasted together, the pressing plate 29 presses the connection between the two ends of the paperboard, so that the two ends of the paperboard are pasted more firmly, when the pasting is finished, the second single-shaft motor 27 drives the pressing plate 29 to rotate in the opposite direction, so that the pressing plate 29 no longer presses the paperboard, the first single-shaft motor 24 drives the positioning plate 26 to rotate in the opposite direction, so that the pasted paper box stands up, the worker drives the standing paper box to move upwards, so that the paper box is separated from the positioning plate 26, and the pasted paper box can be taken off, the first lead screw 31 is rotated by driving the adjacent two first lead screws 31 by the double-shaft motor 30 respectively, the length of the first lead screw 31 in the threaded sleeve 32 is changed, so that the centering plate 6 moves, and the first lead screw 31 rotates stably relative to the support table 3 through the design of the second support part 33 and the bearing.

[0043] In the fourth embodiment, based on the first embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 are given, the side close to each other of the two centering plates 6 is provided with a supporting plate 34, the supporting plate 34 and the centering plate 6 are connected through a connecting frame 35, the straight-line applicator includes a movable frame 36 fixedly installed on the glue outlet head 7, a second lead screw 37 is threaded through the movable frame 36, one of the centering plates 6 is respectively fixedly connected with a third motor seat 40 and a third support part 41, one end of the second lead screw 37 is connected with the third motor seat 40 through a third single-shaft motor 39, the other end of the second lead screw 37 is connected with the third support part 41 through a bearing, a positioning column 38 is threaded through the movable frame 36, the positioning column 38 and the centering plate 6 are connected through a connecting plate 42, a recess 43 is formed in the support table 3, and a plurality of support rollers 44 are rotatably arranged in the recess 43;

[0044] Through the design of the supporting plate 34 and the connecting frame 35, the two ends of the paperboard are supported, and the possibility of bending of the two ends of the paperboard is reduced, through the design of the positioning column 38 and the connecting plate 42, the trajectory of the horizontal sliding of the movable frame 36 is limited, so that the movable frame 36 and the glue outlet head 7 move stably in the horizontal direction, the third single-shaft motor 39 drives the second lead screw 37 to rotate, the movable frame 36 and the glue outlet head 7 move in the horizontal direction through the second lead screw 37, through the design of the recess 43 and the support roller 44, the support roller 44 supports the paperboard, reduces the resistance when the paperboard moves in the middle, and facilitates the centering plate 6 to push the paperboard to move in the middle.

[0045] An automatic sealing and pasting method of a box in the embodiment, comprising the automatic sealing and pasting machine as described above, comprising the following steps:

[0046] Step one: the glue head 7 is connected with the external glue device through the hose, the staff puts the paperboard which needs to be sealed with the paste box on the support table 3, and the two centering plates 6 are driven to move close to each other at the same time through the centering driver, the paperboard is moved by the two centering plates 6, so that the paperboard is placed in the middle;

[0047] Step two: the middle position of the paperboard is fixed by the paperboard positioning mechanism, so that the paperboard is fixed on the support table 3, and the glue head 7 is driven to move by the straight-line applicator, so that the glue head 7 applies to one end of the paperboard;

[0048] Step three: when the application is finished, the hydraulic telescopic rod 5 drives the movable seat 2 to move upwards, so that the two top plates 8 respectively push the two ends of the paperboard to be vertically erected;

[0049] Step four: when the two ends of the paperboard are vertically erected, the bottom of the support frame 18 and the blocking strip 19 are in contact, the top plate 8 continues to move upwards, and the sliding plate 9 stops moving upwards with the movable seat 2;

[0050] Step five: when the sliding plate 9 stops moving and the top plate 8 continues to move upwards, the side pushing plate 10 is driven to slide relative to the sliding plate 9 by the side pushing gear mechanism, the side pushing plate 10 penetrates through the through hole 11, and the two side pushing plates 10 move close to each other, and the two ends of the paperboard are respectively pushed to be folded to the middle position of the paperboard by the two side pushing plates 10;

[0051] Step six: during the movement of the two side pushing plates 10, the side pushing plate 10 on the side close to the glue head 7 first contacts the paperboard, so that the end of the paperboard coated with glue is first folded to the middle position of the paperboard, and the end of the paperboard without glue is pressed on the end of the paperboard with glue, so that the two ends of the paperboard are bonded together, the paperboard positioning mechanism is again released to fix the good paste box, and the staff takes down the carton.

[0052] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes can be made in these embodiments without departing from the principles and spirit of the application, the scope of which is defined in the claims and their equivalents.

Claims

1. An automatic carton sealing and box filling machine comprising a base (1), characterised in that: The upper of the base (1) is equipped with the movable seat (2), and the base (1) and the movable seat (2) are connected through the hydraulic telescopic rod (5). The upper of the movable seat (2) is equipped with the support table (3), and the support table (3) is equipped with the paperboard positioning mechanism. The support table (3) and the base (1) are connected through the first support plate (4). The two sides of the support table (3) are respectively equipped with the centering plate (6), and the support table (3) and the two centering plates (6) are connected through the centering driver. One side of one of the centering plates (6) is equipped with the glue outlet head (7), and the glue outlet head (7) and the centering plate (6) are connected through the straight-line applicator. The two sides of the support table (3) are respectively equipped with the top plate (8), and the bottom end of the top plate (8) is fixedly connected with the movable seat (2). The two sides of the movable seat (2) are respectively equipped with the sliding plate (9), and the sliding plate (9) and the movable seat (2) are connected through the vertical elastic sliding unit. The sliding plate (9) is fixedly connected with the support frame (18). The bottom of the support table (3) is fixedly connected with the blocking strip (19) matched with the support frame (18). The sliding plate (9) is penetrated through the side pushing plate (10). The top plate (8) is provided with the through hole (11) matched with the side pushing plate (10), and the top plate (8) and the side pushing plate (10) are connected through the side pushing gear mechanism. Further comprising the following steps: Step one: the glue outlet head (7) is connected with the external glue outlet device through the hose. The staff places the paperboard needing to be sealed with the paste box on the support table (3). The two centering plates (6) are driven to move close to each other through the centering driver. The paperboard is moved through the two centering plates (6) to be placed in the middle. Step two: the middle position of the paperboard is fixed through the paperboard positioning mechanism, so that the paperboard is fixed on the support table (3). The glue outlet head (7) is driven to move through the straight-line applicator, so that the glue outlet head (7) applies to one end of the paperboard. Step three: when the application is finished, the movable seat (2) is driven to move up through the hydraulic telescopic rod (5), so that the two top plates (8) respectively push the two ends of the paperboard to be vertically erected. Step four: when the two ends of the paperboard are vertically erected, the bottom of the support frame (18) is in contact with the blocking strip (19). The top plate (8) continues to move up, and the sliding plate (9) stops following the movable seat (2) to move up. Step five: when the sliding plate (9) stops moving and the top plate (8) continues to move up, the top plate (8) drives the side pushing plate (10) to slide relative to the sliding plate (9) through the side pushing gear mechanism. The side pushing plate (10) penetrates through the through hole (11). The two side pushing plates (10) move close to each other. The two ends of the paperboard are respectively pushed to be folded to the middle position of the paperboard through the two side pushing plates (10). Step six: during the movement of the two side pushing plates (10), one of the side pushing plates (10) close to the glue outlet head (7) first contacts the paperboard, so that one end of the paperboard coated with glue is first folded to the middle position of the paperboard. One end of the paperboard without glue is pressed on one end of the paperboard with glue, so that the two ends of the paperboard are bonded together. The fixing of the good paste box is released through the paperboard positioning mechanism again. The staff takes down the carton.

2. An automatic box sealing and pasting machine according to claim 1, characterized in that: The side pushing tooth driving mechanism comprises first racks (12) fixedly installed on two sides of the side pushing plate (10) respectively, two mounting holes (45) are formed in the sliding plate (9), two adjacent first racks (12) penetrate through two adjacent mounting holes (45) respectively, a first gear (13) meshing with the first rack (12) is arranged in the mounting hole (45), one side of the first gear (13) is fixedly connected with a rotating shaft (14), the rotating shaft (14) penetrates through the sliding plate (9), one end of the rotating shaft (14) away from the first gear (13) is fixedly connected with a second gear (15), one side of the second gear (15) is provided with a second rack (16), and the second rack (16) and the top plate (8) are connected through a first supporting portion (17).

3. An automatic box sealing and pasting machine according to claim 1, characterized in that: The vertical elastic sliding unit comprises guide blocks (20) fixedly installed on two sides of the movable seat (2) respectively, a guide groove (21) is formed in the sliding plate (9), the guide blocks (20) are located in the guide groove (21), one side of the sliding plate (9) is fixedly connected with a second supporting plate (22), and the top of the second supporting plate (22) and the bottom of the movable seat (2) are connected through a tensile spring (23).

4. An automatic box sealing and pasting machine according to claim 1, characterized in that: The paperboard positioning mechanism comprises two first single-shaft motors (24) arranged on one side of the supporting table (3), the first single-shaft motor (24) and the supporting table (3) are connected through a first motor seat (25), the output end of the first single-shaft motor (24) is fixedly connected with a positioning plate (26), one side of the supporting table (3) is provided with a second single-shaft motor (27), the second single-shaft motor (27) and the supporting table (3) are connected through a second motor seat (28), and the output end of the second single-shaft motor (27) is fixedly connected with a pressing plate (29).

5. An automatic box sealing and pasting machine according to claim 1, characterized in that: The centering driver comprises double-shaft motors (30) fixedly installed on two sides of the supporting table (3) respectively, the two output ends of the double-shaft motor (30) are fixedly connected with first lead screws (31) respectively, the thread directions of the adjacent two first lead screws (31) are opposite, the outside of the first lead screw (31) is sleeved with a threaded sleeve (32), and one end of the threaded sleeve (32) away from the double-shaft motor (30) is fixedly connected with a corresponding centering plate (6).

6. An automatic box sealing and pasting machine according to claim 5, characterized in that: The outside of the first lead screw (31) is sleeved with a second supporting portion (33), the first lead screw (31) and the second supporting portion (33) are connected through a bearing, and one side of the second supporting portion (33) is fixedly connected with the supporting table (3).

7. An automatic box sealing and pasting machine according to claim 1, characterized in that: The two centering plates (6) are provided with supporting plates (34) on the sides close to each other, and the supporting plate (34) and the centering plate (6) are connected through a connecting frame (35).

8. An automatic box sealing and pasting machine according to claim 1, characterized in that: The straight-line applicator comprises a movable frame (36) fixedly installed on the glue outlet head (7), a second screw rod (37) threaded through the movable frame (36), one of the central plates (6) is fixedly connected with a third motor base (40) and a third support part (41) respectively, one end of the second screw rod (37) is connected with the third motor base (40) through a third single-shaft motor (39), the other end of the second screw rod (37) is connected with the third support part (41) through a bearing, a positioning column (38) is threaded through the movable frame (36), and the positioning column (38) is connected with the central plate (6) through a connecting plate (42).

9. An automatic box sealing and pasting machine according to claim 1, characterized in that: The support table (3) is provided with a groove (43), and a plurality of support rollers (44) are rotatably arranged in the groove (43).

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