Top-sealing zigzag welding device

Abstract

The invention discloses a top sealing and folding welding device, belongs to the technical field of packaging carton top folding welding devices, and solves the problems of low sealing and capping processing efficiency, high equipment cost, large occupied area, high energy consumption, high failure rate and poor product quality stability in the prior art. Comprising a carton centering mechanism arranged on a top sealing and folding machine frame, a pre-folding mechanism and a folding extrusion mechanism are sequentially arranged above the carton centering mechanism in the carton conveying direction, a top sealing and welding mechanism is arranged on the side portion of the folding extrusion mechanism, and a folding keeping mechanism is arranged between the top sealing and welding mechanism and the folding extrusion mechanism; a top sealing foam suction nozzle is arranged above the welding part of the top sealing welding mechanism; and a foam liquid separation tank is arranged between the suction opening of the foam suction exhaust fan and the top sealing foam suction nozzle. The device is reasonable in design, compact in structure, high in equipment integration degree, space-saving, low in equipment failure rate, energy-saving, capable of effectively improving the machining efficiency and stable in product quality.

Description

Technical Field

[0001] The invention belongs to the technical field of top folding welding devices for packaging paper boxes, and in particular relates to a top folding welding device. Background Art

[0002] The top sealing and capping of existing square brick-shaped paper box packaging usually requires the use of two sets of equipment, namely: a set of folding and welding equipment for sealing the top of the packaging paper box, and a set of capping equipment for welding the box cover on the top outer side after the top of the packaging paper box is sealed. This traditional operation method and equipment not only have low sealing and capping processing efficiency, high equipment cost, and high energy consumption, but also occupy a large area as a whole, have a high equipment failure rate, and poor product quality stability. Therefore, it is necessary to improve the existing equipment for folding and welding the top of the packaging paper box. Summary of the invention

[0003] The present invention aims at solving the above problems and provides a capping folding welding device which has high equipment integration, saves space, has low failure rate, saves energy, can effectively improve processing efficiency and has stable product quality.

[0004] The technical solution adopted by the present invention is: the capping folding welding device includes a capping folding frame, which is characterized in that: the capping folding frame is provided with a carton centering mechanism for centering and positioning the packaging carton on the carton conveying mechanism, and a pre-folding mechanism and a folding extrusion mechanism are sequentially arranged above the carton centering mechanism and along the carton conveying direction, a capping welding mechanism is also arranged on the side of the folding extrusion mechanism, and a folding holding mechanism is arranged between the capping welding mechanism and the folding extrusion mechanism; a capping foam suction nozzle is arranged above the welding part of the capping welding mechanism, the capping foam suction nozzle is connected to the foam suction exhaust fan through a foam suction pipeline, and a foam-liquid separation tank for temporarily storing foam is arranged between the exhaust port of the foam suction exhaust fan and the capping foam suction nozzle.

[0005] The carton centering mechanism comprises carton centering frames arranged on both sides of the packaging carton, a centering cylinder is arranged on the side of the carton centering frame away from the packaging carton, the cylinder body of the centering cylinder is fixedly connected to the capping folding frame, and the telescopic end of the centering cylinder is connected to the carton centering frame; and two groups of carton centering pallets arranged in pairs are also arranged on the side of the carton centering frame close to the packaging carton, and a carton folding centering cavity is respectively arranged between the two carton centering pallets of each pair. The carton centering frame and the two groups of carton centering pallets thereon are driven to reciprocate by the telescopic movement of the centering cylinder, and then the two packaging carton located below the pre-folding mechanism and the folding extrusion mechanism are respectively positioned and clamped, so that the position accuracy of the corresponding packaging carton is maintained in the process that the pre-folding mechanism and the folding extrusion mechanism respectively pre-fold and extrudes the top of the packaging carton below.

[0006] The pre-folding mechanism comprises a vertically arranged pre-folding cylinder, the cylinder body of which is fixedly arranged on the top folding frame, and an L-shaped pre-folding plate is arranged at the telescopic end of the lower part of the pre-folding cylinder. The telescopic movement of the pre-folding cylinder drives the L-shaped pre-folding plate to pre-fold the top of the packaging carton clamped by the carton centering mechanism.

[0007] The folding extrusion mechanism includes a double-axis extrusion cylinder, which is arranged in a horizontal direction perpendicular to the paper box conveying direction, and the two ends of the double-axis extrusion cylinder are respectively provided with a front extrusion block and a rear extrusion block arranged oppositely; the upper side of the cylinder body of the double-axis extrusion cylinder is connected to the extrusion cylinder connecting plate, and the extrusion cylinder connecting plate is connected to the telescopic end of the lower part of the extrusion connecting plate lifting cylinder vertically arranged on the top folding frame, and the extrusion cylinder connecting plate is also slidably connected to the guide rod sliding sleeve fixedly arranged on the top folding frame through the extrusion connecting plate lifting guide rod. Through the extension and retraction of the extrusion connecting plate lifting cylinder, the extrusion cylinder connecting plate and the double-axis extrusion cylinder thereon are driven to reciprocate and lift along the extrusion connecting plate lifting guide rod, and the double-axis extrusion cylinder is used to drive the front extrusion block and the rear extrusion block respectively arranged on the two telescopic ends to move relative or back to each other, thereby extruding and forming the top of the packaging paper box clamped by the centering mechanism after pre-folding.

[0008] The front extrusion block and the rear extrusion block have the same appearance structure. Both the front extrusion block and the rear extrusion block include an extrusion block body. The extrusion block body is provided with a folded extrusion end face on one side facing the packaging paper box. In addition, a box cover avoidance notch is provided in the middle of the folded extrusion end face of the front extrusion block. The folded extrusion end faces on the front extrusion block and the rear extrusion block are used to extrude the top of the packaging paper box after pre-folding. In the process of extruding the top of the packaging paper box, the box cover on the packaging paper box is avoided by the box cover avoidance notch provided on the front extrusion block.

[0009] The folding shape holding mechanism comprises two groups of symmetrically arranged folding shape holding templates, and a folding top passing gap is provided between the two groups of folding shape holding templates. The folding top passing gap provided between the two groups of folding shape holding templates is used to maintain the shape of the top of the packaging paper box after pre-folding and extrusion, and prevent looseness before welding, so as to facilitate the subsequent capping welding mechanism to perform ultrasonic welding on the top of the formed packaging paper box.

[0010] The capping welding mechanism includes a capping welding frame, an ultrasonic transducer is arranged at one end of the capping welding frame, an ultrasonic welding head is arranged at the front end of the ultrasonic transducer, a floating pressure sealing plate is also arranged in front of the ultrasonic welding head, and the floating pressure sealing plate is movably connected to the other end of the capping welding frame; a folding top welding space is arranged between the ultrasonic welding head and the floating pressure sealing plate, the folding top welding space corresponds to the outlet position of the folding holding mechanism, and the capping foam suction nozzle is located directly above the folding top welding space; the ultrasonic transducer is also slidably arranged on the welding shift slide rail through a welding shift slide, the welding shift slide rail is arranged along a horizontal direction perpendicular to the paper box conveying direction, and the welding shift slide is connected to the telescopic end of the welding shift cylinder. After the top of the packaging carton after pre-folding and extrusion comes out of the exit position of the folding holding mechanism, the welding shift cylinder is used to drive the welding shift slide and the ultrasonic transducer and ultrasonic welding head thereon to move forward along the welding shift slide rail, and then the top of the packaging carton in the folded top welding space is ultrasonically welded and sealed through the cooperation of the ultrasonic welding head and the floating pressure sealing plate; and before ultrasonic welding, the top of the packaging carton can be subjected to negative pressure suction before sealing by using the capping foam suction nozzle. If there is a lot of foam in the filled material, the negative pressure suction of the capping foam suction nozzle will remove the material foam remaining on the top of the packaging carton; and, even if there is no foam, the negative pressure suction of the capping foam suction nozzle can make the air in the top space of the packaging carton present a negative pressure state, so that the molding effect after sealing is better, beautiful and not bloated, and provides convenient conditions for the subsequent molding of the top ear, thereby ensuring the quality of the welding seal.

[0011] The floating sealing plate includes a sealing plate body, the rear side of which is matched and connected with a spherical groove provided at the end of a capping welding frame through a hemispherical floating block, and a sealing contact surface for contacting an ultrasonic horn is provided at the front side of the sealing plate body, and a box cover avoidance space is also provided on the sealing plate body and behind the sealing contact surface. In the process of ultrasonic welding sealing, the arc spherical connection structure between the hemispherical floating block of the sealing plate body and the spherical groove at the end of the capping welding frame is used to flexibly adjust the contact position between the floating sealing plate and the ultrasonic horn, thereby further improving the welding quality.

[0012] The beneficial effects of the present invention are as follows: since the present invention adopts a carton centering mechanism arranged on a capping folding frame, a pre-folding mechanism and a folding extrusion mechanism are arranged above the carton centering mechanism and in sequence along the carton conveying direction, a capping welding mechanism is arranged on the side of the folding extrusion mechanism, and a folding holding mechanism is arranged between the capping welding mechanism and the folding extrusion mechanism; a capping foam suction nozzle is arranged above the welding part of the capping welding mechanism, the capping foam suction nozzle is connected to the foam suction exhaust fan through a foam suction pipeline, and a foam-liquid separation tank is arranged between the exhaust port of the foam suction exhaust fan and the capping foam suction nozzle, so the design is reasonable, the structure is compact, the equipment integration is high, space is saved, the equipment failure rate is low, energy is saved, and the processing efficiency can be effectively improved, and the product quality is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 yes Figure 1 A partial structural schematic diagram of the lower structure.

[0015] Figure 3 yes Figure 2 A schematic diagram of a connection structure of a carton centering mechanism, a pre-folding mechanism and a folding and squeezing mechanism.

[0016] Figure 4 yes Figure 3 A-direction view.

[0017] Figure 5 yes Figure 3 A structural schematic diagram of a carton centering mechanism in FIG.

[0018] Figure 6 yes Figure 3 A structural schematic diagram of the front extrusion block and the rear extrusion block.

[0019] Figure 7 yes Figure 2 A schematic diagram of a connection structure between a capping welding mechanism and a folding shape holding mechanism.

[0020] Figure 8 yes Figure 7 B view.

[0021] Fig. 9 yes Figure 8 C-direction view.

[0022] Explanation of the numbers in the figure: 1 capping folding frame, 2 carton centering mechanism, 3 pre-folding mechanism, 4 folding extrusion mechanism, 5 folding holding mechanism, 6 capping welding mechanism, 7 capping foam suction nozzle, 8 foam suction pipeline, 9 foam suction fan, 10 foam liquid separation tank, 11 packaging carton, 12 centering cylinder, 13 carton centering frame, 14 pre-folding cylinder, 15 L-shaped pre-folding plate, 16 extrusion cylinder connecting plate, 17 double-axis extrusion cylinder, 18 front extrusion block, 19 rear extrusion block, 20 extrusion connecting plate lifting cylinder, 21 extrusion connecting plate lifting guide rod, 22 carton centering card plate, 23 carton folding centering cavity, 24 extrusion block main body, 25 folding extrusion end face, 26 box cover avoidance notch, 27 folding retaining plate, 28 folding top passing gap, 29 capping welding frame, 30 ultrasonic transducer, 31 floating pressure sealing plate, 32 ultrasonic welding head, 33 folding top welding space, 34 welding shift slide, 35 welding shift slide rail, 36 welding shift cylinder, 37 pressure sealing plate main body, 38 pressure sealing contact surface, 39 box cover avoidance space, 40 hemispherical floating block, 41 spherical groove, 42 carton position sensor. DETAILED DESCRIPTION

[0023] according to Figures 1 to 9 The specific structure of the present invention is described in detail. The capping folding welding device includes a capping folding frame 1, and the capping folding frame 1 is provided with a carton centering mechanism 2 for centering and positioning the packaging carton 11 on the carton conveying mechanism. The carton centering mechanism 2 includes a carton centering frame 13 arranged on the front and rear sides of the packaging carton 11 on the carton conveying mechanism, and the carton centering frame 13 is provided with a centering cylinder 12 on the side away from the packaging carton 11, and the cylinder body of the centering cylinder 12 is fixedly connected to the capping folding frame 1, and the telescopic end of the centering cylinder 12 is connected to the carton centering frame 13; and the carton centering frame 13 is close to the packaging carton 11. Two groups of carton centering pallets 22 arranged in pairs (a total of four, two in a group) are respectively provided, and a carton folding centering cavity 23 for holding the packaging carton 11 is respectively provided between the two carton centering pallets 22 in each pair. Furthermore, by extending and retracting the centering cylinder 12, the carton centering frame 13 and the two groups of carton centering clamps 22 thereon are driven to move back and forth, so as to position and clamp the two packaging cartons 11 located below the pre-folding mechanism 3 and the folding and squeezing mechanism 4 respectively, thereby maintaining the position accuracy of the corresponding packaging cartons 11 during the process in which the pre-folding mechanism 3 and the folding and squeezing mechanism 4 respectively pre-fold and squeeze the tops of the packaging cartons 11 below them.

[0024] Above the carton centering mechanism 2 and along the carton conveying direction, a pre-folding mechanism 3 and a folding and squeezing mechanism 4 are sequentially arranged for performing step-by-step forming operations on the top of the packaging carton 11. The pre-folding mechanism 3 includes a vertically arranged pre-folding cylinder 14, the cylinder body of which is fixedly arranged on the capping folding frame 1, and an L-shaped pre-folding plate 15 is arranged at the telescopic end of the lower part of the pre-folding cylinder 14; thereby, the telescopic movement of the pre-folding cylinder 14 is utilized to drive the L-shaped pre-folding plate 15 to pre-fold the top of the packaging carton 11 clamped by the carton centering mechanism 2. The folding and squeezing mechanism 4 includes a biaxial squeezing cylinder 17 (clamping cylinder), which is arranged in a horizontal direction perpendicular to the carton conveying direction; the biaxial squeezing cylinder 17 is located at both ends of the front and rear sides of the packaging carton 11, and is respectively provided with a front squeezing block 18 and a rear squeezing block 19 arranged oppositely. The front extrusion block 18 and the rear extrusion block 19 have the same external structure. Both the front extrusion block 18 and the rear extrusion block 19 include an extrusion block body 24. The extrusion block body 24 is provided with a folded extrusion end face 25 on one side facing the packaging paper box 11, and a box cover avoidance notch 26 is also provided in the middle of the folded extrusion end face 25 of the front extrusion block 18. The folded extrusion end faces 25 on the front extrusion block 18 and the rear extrusion block 19 are used to extrude the top of the packaging paper box 11 after pre-folding, and in the process of extruding the top of the packaging paper box 11, the box cover on the packaging paper box 11 is avoided by the box cover avoidance notch 26 provided on the front extrusion block 18.

[0025] The upper side of the cylinder body of the double-axis extrusion cylinder 17 is connected to the extrusion cylinder connecting plate 16, and the extrusion cylinder connecting plate 16 is connected to the telescopic end of the lower part of the extrusion connecting plate lifting cylinder 20 arranged vertically on the capping folding frame 1; and the extrusion cylinder connecting plate 16 is also slidably connected to the guide rod sliding sleeve fixedly arranged on the capping folding frame 1 through the vertically arranged extrusion connecting plate lifting guide rod 21. Therefore, through the extension and contraction of the extrusion connecting plate lifting cylinder 20, the extrusion cylinder connecting plate 16 and the double-axis extrusion cylinder 17 thereon are driven to reciprocate along the extrusion connecting plate lifting guide rod 21, and the double-axis extrusion cylinder 17 is used to drive the front extrusion block 18 and the rear extrusion block 19 respectively arranged on the two telescopic ends to move relative or back to each other, so as to extrude and shape the top of the packaging paper box 11 clamped by the centering mechanism after pre-folding.

[0026] The outer side of the folding and squeezing mechanism 4 along the paper box conveying direction is also provided with a capping welding mechanism 6, and a capping foam suction nozzle 7 is provided above the welding part of the capping welding mechanism 6, and the capping foam suction nozzle 7 is connected to the foam suction fan 9 through a foam suction pipeline 8; a foam liquid separation tank 10 for temporarily storing foam is provided between the suction port of the foam suction fan 9 and the capping foam suction nozzle 7, and a liquid discharge port is also provided at the bottom of the foam liquid separation tank 10. At the same time, a folding holding mechanism 5 is provided between the capping welding mechanism 6 and the folding and squeezing mechanism 4, and the folding holding mechanism 5 includes two groups of symmetrically arranged folding holding templates 27, and a folding top passing gap 28 is provided between the two groups of folding holding templates 27; and then the folding top passing gap 28 provided between the two groups of folding holding templates 27 is used to maintain the shape of the top of the pre-folded and squeezed packaging paper box 11 and prevent it from being loose before welding, so that the subsequent capping welding mechanism 6 can ultrasonically weld the top of the formed packaging paper box 11.

[0027] The capping welding mechanism 6 includes a capping welding frame 29, an ultrasonic transducer 30 is arranged at one end of the capping welding frame 29, and an ultrasonic horn 32 is arranged at the front end of the ultrasonic transducer 30 facing the packaging paper box 11; a floating sealing plate 31 is also arranged in front of the ultrasonic horn 32, and the floating sealing plate 31 is composed of a sealing plate body 37, and the rear side of the sealing plate body 37 is matched and connected with a spherical groove 41 arranged at the other end of the capping welding frame 29 through a hemispherical floating block 40; a sealing contact surface 38 for contacting the ultrasonic horn 32 is arranged on the front side of the sealing plate body 37, and a box cover avoidance space 39 is also arranged on the sealing plate body 37 and behind the sealing contact surface 38. Furthermore, during the ultrasonic welding sealing process, the arc-shaped spherical connection structure between the hemispherical floating block 40 of the sealing plate body 37 and the spherical groove 41 at the end of the capping welding frame 29 is utilized to flexibly adjust the contact position between the floating sealing plate 31 and the ultrasonic welding head 32, thereby improving the welding quality.

[0028] Moreover, a folding top welding space 33 is provided between the ultrasonic welding head 32 and the floating pressure sealing plate 31, and the folding top welding space 33 corresponds to the exit position of the folding top of the folding holding mechanism 5 through the gap 28, and the capping foam suction nozzle 7 is located directly above the folding top welding space 33. The ultrasonic transducer 30 is also slidably arranged on two welding shift slides 35 through a welding shift slide 34, and the two welding shift slides 35 are arranged in a horizontal direction perpendicular to the paper box conveying direction, and the welding shift slide 34 is connected to the telescopic end of the welding shift cylinder 36. A paper box position sensor 42 for judging the position of the packaging paper box 11 and sending a control signal to the capping welding mechanism 6 is also provided on the rear side of the floating pressure sealing plate 31 and the end of the capping welding frame 29. Therefore, after the top of the packaging paper box 11 after pre-folding and extrusion comes out from the exit position of the folding holding mechanism 5, the welding displacement cylinder 36 is used to drive the welding displacement slide 34 and the ultrasonic transducer 30 and the ultrasonic welding head 32 thereon to move forward along the welding displacement slide rail 35, and then the top of the packaging paper box 11 in the folded top welding space 33 is ultrasonically welded and sealed by the cooperation of the ultrasonic welding head 32 and the floating pressure sealing plate 31; and before ultrasonic welding, the top foam suction nozzle 7 can be used to perform negative pressure suction on the top of the packaging paper box 11 before sealing. If there is a lot of foam in the filled material, the negative pressure suction of the top foam suction nozzle 7 will remove the material foam remaining on the top of the packaging paper box 11; and, even if there is no foam, the negative pressure suction of the top foam suction nozzle 7 can also make the air in the top space of the packaging paper box 11 present a negative pressure state, so that the molding effect after sealing is better, beautiful and not bloated, and provides convenient conditions for the subsequent molding of the top ear, ensuring the quality of the welding seal.

[0029] When the capping folding welding device is used, first, the packaging paper box 11 after the top welding cover and material filling is moved to the bottom of the pre-folding mechanism 3 along with the paper box conveying mechanism, then the paper box conveying mechanism temporarily stops, and the centering cylinder 12 of the paper box centering mechanism 2 is extended, and then the paper box centering frame 13 and the two sets of paper box centering clamps 22 thereon are driven to position and clamp the packaging paper box 11 located below the pre-folding mechanism 3 (and below the folding and squeezing mechanism 4); then, the pre-folding cylinder 14 of the pre-folding mechanism 3 is extended downward, driving the L-shaped pre-folding plate 15 to pre-fold the top of the packaging paper box 11 clamped by the paper box centering mechanism 2. Subsequently, the centering cylinder 12 of the paper box centering mechanism 2 is retracted, the packaging paper box 11 is released, and the paper box conveying mechanism continues to convey forward a box distance, allowing the pre-folded packaging paper box 11 to move forward to the bottom of the folding and squeezing mechanism 4. Then, the carton centering mechanism 2 clamps the pre-folded packaging carton under the folding and extruding mechanism 4 again (at the same time, the carton centering mechanism 2 also clamps a newly conveyed packaging carton under the pre-folding mechanism 3 to prepare for pre-folding); thereafter, the extrusion connecting plate lifting cylinder 20 is extended downward to allow the extrusion cylinder connecting plate 16 and the double-axis extrusion cylinder 17 thereon to descend to the extrusion height along the extrusion connecting plate lifting guide rod 21, and the double-axis extrusion cylinder 17 of the folding and extruding mechanism 4 is retracted, thereby driving the front extrusion blocks 18 and the rear extrusion blocks 19 respectively arranged on the two telescopic ends to move inwardly and relatively, and utilizing the folding extrusion end faces 25 on the front extrusion blocks 18 and the rear extrusion blocks 19 to extrude and form the top of the packaging carton 11 that has been pre-folded and clamped by the centering mechanism.

[0030] The top-formed packaging paper box 11 moves forward to the bottom of the capping welding mechanism 6 along with the paper box conveying mechanism, and the top shape of the packaging paper box 11 is maintained through the gap 28 between the two groups of folding holding templates 27 of the folding holding mechanism 5, so as to facilitate ultrasonic welding of the top of the formed packaging paper box 11. After the top of the packaging paper box 11 after pre-folding and extrusion comes out from the outlet position of the folding holding mechanism 5, the foam of the material remaining on the top of the packaging paper box 11 during the previous filling is first sucked out by the capping foam suction nozzle 7; then, the welding displacement cylinder 36 of the capping welding mechanism 6 is extended to drive the welding displacement slide 34 and the ultrasonic transducer 30 and ultrasonic welding head 32 thereon to move forward along the welding displacement slide rail 35, so that the top of the packaging paper box 11 in the folding top welding space 33 is ultrasonically welded and sealed by the cooperation of the ultrasonic welding head 32 and the floating pressure sealing plate 31.

Claims

1. A capping folding welding device, comprising a capping folding frame (1), characterized in that: The capping and folding frame (1) is provided with a carton centering mechanism (2) for centering and positioning a packaging carton (11) on a carton conveying mechanism; a pre-folding mechanism (3) and a folding and squeezing mechanism (4) are arranged in sequence above the carton centering mechanism (2) and along the carton conveying direction; a capping welding mechanism (6) is also arranged on the side of the folding and squeezing mechanism (4); and a folding holding mechanism (5) is arranged between the capping welding mechanism (6) and the folding and squeezing mechanism (4); a capping foam suction nozzle (7) is arranged above the welding portion of the capping welding mechanism (6); the capping foam suction nozzle (7) is connected to a foam suction exhaust fan (9) via a foam suction pipeline (8); and a foam-liquid separation tank (10) for temporarily storing foam is arranged between the exhaust port of the foam suction exhaust fan (9) and the capping foam suction nozzle (7).

2. The capping folding welding device according to claim 1 is characterized in that: The carton centering mechanism (2) comprises carton centering frames (13) arranged on both sides of the packaging carton (11); a centering cylinder (12) is arranged on the side of the carton centering frame (13) away from the packaging carton (11); the cylinder body of the centering cylinder (12) is fixedly connected to the capping folding frame (1), and the telescopic end of the centering cylinder (12) is connected to the carton centering frame (13); and two groups of carton centering clamps (22) arranged in pairs are also arranged on the side of the carton centering frame (13) close to the packaging carton (11); and a carton folding centering cavity (23) is respectively arranged between the two carton centering clamps (22) of each pair.

3. The capping folding welding device according to claim 1 is characterized in that: The pre-folding mechanism (3) comprises a pre-folding cylinder (14) arranged vertically, the cylinder body of the pre-folding cylinder (14) being fixedly arranged on the capping folding frame (1), and an L-shaped pre-folding plate (15) being arranged at the telescopic end of the lower part of the pre-folding cylinder (14).

4. The capping folding welding device according to claim 1 is characterized in that: The folding extrusion mechanism (4) comprises a double-axis extrusion cylinder (17), which is arranged in a horizontal direction perpendicular to the paper box conveying direction, and a front extrusion block (18) and a rear extrusion block (19) arranged opposite to each other are respectively arranged at two ends of the double-axis extrusion cylinder (17); the upper side of the cylinder body of the double-axis extrusion cylinder (17) is connected to an extrusion cylinder connecting plate (16), and the extrusion cylinder connecting plate (16) is connected to the telescopic end of the lower part of an extrusion connecting plate lifting cylinder (20) vertically arranged on the top folding frame (1); the extrusion cylinder connecting plate (16) is also slidably connected to a guide rod sliding sleeve fixedly arranged on the top folding frame (1) via an extrusion connecting plate lifting guide rod (21).

5. The capping folding welding device according to claim 4 is characterized in that: The front extrusion block (18) and the rear extrusion block (19) have the same external structure. Both the front extrusion block (18) and the rear extrusion block (19) comprise an extrusion block body (24). A folded extrusion end surface (25) is provided on one side of the extrusion block body (24) facing the packaging paper box (11). Furthermore, a cover avoidance notch (26) is provided in the middle of the folded extrusion end surface (25) of the front extrusion block (18).

6. The capping folding welding device according to claim 1 is characterized in that: The folding shape retaining mechanism (5) comprises two groups of symmetrically arranged folding shape retaining templates (27), and a folding top passing gap (28) is provided between the two groups of folding shape retaining templates (27).

7. The capping folding welding device according to claim 1 is characterized in that: The capping welding mechanism (6) comprises a capping welding frame (29), one end of which is provided with an ultrasonic transducer (30), the front end of which is provided with an ultrasonic welding head (32), a floating pressure sealing plate (31) is also provided in front of the ultrasonic welding head (32), and the floating pressure sealing plate (31) is movably connected to the other end of the capping welding frame (29); a folded top welding space (31) is provided between the ultrasonic welding head (32) and the floating pressure sealing plate (31). 33), the folding top welding space (33) corresponds to the outlet position of the folding holding mechanism (5), and the capping foam suction nozzle (7) is located directly above the folding top welding space (33); the ultrasonic transducer (30) is also slidably arranged on the welding shift slide rail (35) through the welding shift slide seat (34), the welding shift slide rail (35) is arranged in a horizontal direction perpendicular to the paper box conveying direction, and the welding shift slide seat (34) is connected to the telescopic end of the welding shift cylinder (36).

8. The capping folding welding device according to claim 7 is characterized in that: The floating sealing plate (31) comprises a sealing plate body (37), the rear side of the sealing plate body (37) being matched and connected to a spherical groove (41) provided at the end of a capping welding frame (29) via a hemispherical floating block (40), the front side of the sealing plate body (37) being provided with a sealing contact surface (38) for contacting an ultrasonic welding head (32), and a box cover avoidance space (39) being provided on the sealing plate body (37) and behind the sealing contact surface (38).

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