A packaging material conveying and sealing apparatus and method thereof

Abstract

The present application relates to the field of packaging machinery, in particular to a packaging material conveying and sealing device and a method thereof. The device comprises a longitudinal sealing mechanism, a feeding mechanism, a transverse sealing mechanism and a control mechanism. The longitudinal sealing mechanism seals two longitudinal edges of the packaging material. The feeding mechanism comprises an identification device for reading the identification on the packaging material. The control mechanism controls the feeding mechanism to intermittently convey the packaging material according to the identification information read by the identification device. The transverse sealing mechanism seals the conveyed packaging material in the transverse direction. The control mechanism controls the feeding mechanism to intermittently convey the packaging material according to the identification information read, so that the conveying error can be corrected in real time according to the identification on the packaging material, the error accumulation is avoided to cause the transverse sealing position to deviate, and the size of each sealing unit is ensured to be consistent. The packaging material is sealed in the transverse direction after being intermittently stationary, so that a complex follow-up tracking component is not needed, the mechanical structure is simplified, and the manufacturing cost and operation difficulty are reduced.

Description

Technical Field

[0001] This invention relates to the field of packaging machinery, and more specifically, to a packaging material conveying and sealing device and method thereof. Background Technology

[0002] In the field of packaging machinery, especially in the continuous molding production of liquid food paper-aluminum-plastic composite packaging (such as Tetra Pak), upstream stations need to roll packaging materials into cylindrical shapes for conveying and sealing, forming multiple continuous sealing units. These units are then cut and separated by downstream cutting mechanisms to form individual finished packages. The sealing process is divided into longitudinal sealing and transverse sealing. Longitudinal sealing involves sealing the overlapping edges of the two longitudinal edges of the packaging material, forming a sealed cylindrical shape. Transverse sealing involves sealing the cylindrical packaging material in a direction perpendicular to the longitudinal sealing, forming transverse sealing edges that divide the cylindrical packaging material into multiple sequentially connected sealing units.

[0003] Currently, in the industry, the feeding mechanisms of equipment used for conveying and sealing the aforementioned packaging materials generally adopt a continuous conveying mode, driving the packaging materials forward at a constant speed without interruption. To match the continuous material feeding condition, the longitudinal sealing mechanism often uses a continuously rotating hot press roller to continuously seal the two longitudinal edges of the moving packaging material; however, the transverse sealing mechanism is limited by the continuous movement of the packaging material and cannot complete the transverse sealing at a fixed position. It can only adopt a follow-up or rotating sealing head structure, which moves synchronously with the packaging material during the sealing stage to achieve dynamic sealing.

[0004] However, this traditional solution of continuous conveying and follow-up sealing has significant drawbacks in actual production: First, the follow-up or rotary horizontal sealing structure requires a high-response servo drive system, precision cam transmission, and complex guide and reset components. The machine has many parts, resulting in high manufacturing costs. Furthermore, equipment debugging and daily maintenance are difficult, significantly increasing production and maintenance costs for enterprises. Second, the continuous conveying mode cannot rely on the positioning markings printed on the packaging material surface to correct the conveying stroke in real time. Feeding relies solely on a constant speed, leading to continuous accumulation of conveying errors caused by material slippage, thermal expansion and contraction, and transmission gaps. This results in misalignment between the horizontal sealing position and the marking points, poor sealing accuracy, and difficulty in ensuring dimensional consistency among sealing units. Third, when adapting existing equipment to different packaging specifications, extensive manual and mechanical calibration is required. Adjusting the conveying stroke and horizontal sealing position is cumbersome, and changeover is time-consuming, making it unsuitable for flexible production needs involving multiple specifications and small batches. Summary of the Invention

[0005] This invention aims to overcome at least one of the defects (deficiencies) of the prior art and provides a packaging material conveying and sealing device and method. It solves the problems of existing packaging material conveying and sealing devices using continuous conveying mode, which cannot achieve accurate positioning and controllable intermittent conveying based on the marking information on the packaging material. The conveying error continues to accumulate, resulting in lateral sealing position deviation and poor dimensional consistency of each sealing unit. At the same time, under continuous material feeding conditions, the lateral sealing mechanism needs to be equipped with a follow-up matching structure, which makes the whole machine structure complex and the switching and debugging of different specifications of products cumbersome.

[0006] The technical solution adopted by this invention is a packaging material conveying and sealing device, used to convey packaging materials and seal them to form multiple continuous sealing units; the packaging material is cylindrical, and its outer surface is provided with multiple equally spaced markings; the conveying and sealing device includes a longitudinal sealing mechanism, a feeding mechanism, a transverse sealing mechanism, and a control mechanism, wherein the longitudinal sealing mechanism, the feeding mechanism, and the transverse sealing mechanism are all electrically connected to the control mechanism; the longitudinal sealing mechanism is located upstream of the feeding mechanism and is used to seal the two longitudinal edges of the packaging material; the feeding mechanism includes an identification device, which is used to read the markings on the packaging material, and the control mechanism controls the feeding mechanism to intermittently convey the packaging material according to the marking information collected by the identification device; the transverse sealing mechanism is located downstream of the feeding mechanism and is used to perform transverse sealing on the conveyed packaging material.

[0007] The identification device reads the markings on the packaging material, and the control mechanism controls the feeding mechanism to deliver the material intermittently based on the marking information. On the one hand, it can rely on the markings to correct the conveying error in real time, avoiding the accumulation of errors that cause the horizontal sealing position to shift, and ensuring that the size of each sealing unit is uniform. On the other hand, the packaging material can be horizontally sealed after the conveying interval stops, eliminating the need for complex follow-up tracking components for the horizontal sealing mechanism, simplifying the overall mechanical structure, and reducing manufacturing costs and maintenance difficulty. In addition, when changing to different specifications of packaging materials, only the control parameters and the position of the identification device need to be adjusted, without the need for a lot of manual mechanical calibration, which greatly shortens the changeover time and can well adapt to the flexible production needs of multiple specifications and small batches.

[0008] The feeding mechanism includes a mounting plate, a clamping device, and a first driving device. The clamping device is movably mounted on the mounting plate for clamping or releasing packaging materials. The first driving device is fixed to the mounting plate and connected to the clamping device, driving the clamping device to perform linear reciprocating motion along the conveying direction of the packaging materials. Through the cooperation of the clamping device and the first driving device, a step-by-step conveying cycle of "clamping-forward-releasing-reverse-clamping" is achieved. The clamping and forward stages are the conveying stages, and the releasing and reverse stages are the intermittent stages. After the conveying stages are completed, an intermittent period is formed that allows for longitudinal and lateral sealing, providing a reliable mechanical execution basis for precise step-by-step conveying based on identification information. Furthermore, all components of this feeding mechanism are integrated on the mounting plate, resulting in a compact overall structure that facilitates disassembly, assembly, inspection, and maintenance. Simultaneously, the simple linear reciprocating motion logic allows for precise control of the single conveying distance in conjunction with the control mechanism, effectively reducing conveying deviation.

[0009] The identification device is mounted on a mounting plate via a sliding assembly, which includes a slide rail and a slider. The slide rail is fixed to the mounting plate and extends along the conveying direction of the packaging material, while the slider is slidably mounted on the slide rail. The identification device is slidably mounted on the mounting plate along the conveying direction using the sliding assembly consisting of the slide rail and slider. The position of the identification device can be freely adjusted along the slide rail according to the marking spacing of different packaging materials and the process requirements of different product specifications. There is no need to disassemble and adjust the main feeding and sealing structure of the entire machine; adjustment can be quickly achieved simply by sliding the slider, significantly simplifying the mechanical adjustment steps for specification changes and shortening changeover and debugging time. Simultaneously, the slide rail and slider slide smoothly together, and after adjustment, the position of the identification device can be stably locked, ensuring a constant marking reading position and maintaining accurate signal triggering timing, further guaranteeing the positioning accuracy of intermittent conveying and sealing.

[0010] The identification device includes an adjustment plate and an identification head. The adjustment plate is fixedly mounted on the slider and has an arc-shaped guide groove. The identification head is slidably disposed within the arc-shaped guide groove. Different specifications of paper-aluminum-plastic composite tubular packaging correspond to different diameters of the cylindrical packaging materials, resulting in changes in the tangential angle of the markings on the packaging material surface. If the identification head angle is fixed, problems such as the identification head not being parallel to the marking surface, excessive detection distance, and poor light reflection may occur, leading to identification reading failure or misjudgment of the identification signal. This application provides an arc-shaped guide groove on the adjustment plate, allowing the identification head to slide along the groove and adjust its orientation and installation angle at multiple angles. This adapts to cylindrical packaging materials of different diameters, ensuring the identification head is always aligned with the marking reading area in the optimal position, effectively improving the stability and accuracy of marking recognition.

[0011] The longitudinal sealing mechanism includes a fixed plate, a pressing seat, a second driving device, and a hot press head. The fixed plate has a front side and a rear side. The pressing seat is fixedly installed on the front side of the fixed plate. The hot press head is mounted on the second driving device and is arranged opposite to the pressing seat. The second driving device can drive the hot press head to move closer to or away from the pressing seat. The fixed plate integrates the components to form a compact modular unit, which facilitates the assembly and maintenance of the whole machine. After the packaging material is rolled into a cylindrical shape at the upstream station, its two longitudinal edges form an overlap on one side of the cylindrical tube. The pressing seat and the hot press head are arranged opposite to each other. When the cylindrical packaging material is in the intermittent conveying period and stays between the pressing seat and the hot press head, the second driving device drives the hot press head to move closer to the pressing seat and press the overlap of the two longitudinal edges between them to complete the longitudinal sealing. After sealing, the second driving device drives the hot press head away from the pressing seat to avoid the packaging material and reserve passage space for the next round of conveying.

[0012] The pressing base is equipped with a feeding guide roller, which protrudes from the surface of the pressing base facing the hot press head, and the rolling direction of the feeding guide roller is consistent with the conveying direction of the packaging material. The feeding guide roller can significantly reduce the friction between the packaging material and the pressing base, prevent the surface of the packaging material from being scratched and damaged, and ensure the integrity of the finished product's appearance and the barrier performance of the composite layer.

[0013] The transverse sealing mechanism includes a frame, a third drive device, a first mounting base, and a second mounting base. A transverse sealing slide bar is mounted on the frame, and both the first and second mounting bases are slidably mounted on the slide bar. A first transverse end cap is mounted on the first mounting base, and a second transverse end cap is mounted on the second mounting base, with the first and second transverse end caps positioned opposite each other. The third drive device is mounted on the frame, and its output end is connected to the first mounting base, driving the first mounting base to perform linear reciprocating motion along the transverse sealing slide bar. A connecting rod assembly is provided between the first and second mounting bases. When the first mounting base performs linear reciprocating motion, the connecting rod assembly drives the second mounting base to move along the transverse sealing slide bar in the opposite direction to the first mounting base. The third drive device drives the first mounting base to move, and then the connecting rod assembly drives the second mounting base to slide synchronously in the opposite direction, thereby achieving the opening and closing of the first and second transverse end caps in opposite directions. On the one hand, the entire structure is equipped with only a single power unit, reducing component configuration and equipment manufacturing costs, while simplifying the electrical control logic; on the other hand, the two end caps are fed synchronously towards each other, resulting in uniform pressure force, tight lateral sealing of the pipe, and stable forming quality. The connecting rod assembly is a purely mechanical rigid linkage structure, and the movement sequence of the two mounting seats is forcibly constrained by the mechanical structure, eliminating the action time difference caused by electrical or pneumatic control, and ensuring that the opening and closing actions of the two end caps are always highly synchronized.

[0014] The linkage assembly includes a first linkage, a second linkage, and a third linkage. The second linkage is rotatably mounted on the frame. One end of the first linkage is hinged to a first mounting base, and the other end is hinged to one end of the second linkage. One end of the third linkage is hinged to a second mounting base, and the other end is hinged to the other end of the second linkage. When the third drive device moves the first mounting base forward along the transverse sealing slide bar, the first linkage pushes the second linkage to rotate around its connection with the frame. The other end of the second linkage swings in the opposite direction and pulls the second mounting base backward along the transverse sealing slide bar through the third linkage, causing the first and second transverse sealing heads to simultaneously approach each other from both sides, clamping the packaging material in the middle to complete the transverse sealing. After sealing, the third drive device drives the first mounting base to return to its original position, and the linkage assembly drives the second mounting base to move forward, causing the two sealing heads to separate in opposite directions to avoid the packaging material. The linkage assembly has a simple transmission principle and stable and reliable operation. It can accurately convert the linear reciprocating motion of the first mounting seat into the reverse synchronous motion of the second mounting seat, ensuring that the opening and closing actions of the two end caps are highly synchronized and the sealing force is uniform.

[0015] A method for conveying and sealing packaging materials includes the following steps:

[0016] S1. Identification Step: The identification device reads the markings on the surface of the packaging material at the current workstation and feeds the marking information back to the control mechanism. S2, Intermittent conveying step: The control mechanism controls the feeding mechanism to convey the packaging material forward a set distance according to the received identification information; S3, Longitudinal sealing step: The longitudinal sealing mechanism seals the two longitudinal edges of the packaging material at the current workstation; S4, Lateral sealing step: The lateral sealing mechanism performs lateral sealing on the packaging material at the current station, forming the rear end seal of the current sealing unit and the front end seal of the next sealing unit respectively. Both S3 and S4 are performed during the conveying intervals of the feeding mechanism; S5. Repeat S1 to S4, conveying and sealing segment by segment until the continuous processing of packaging materials is completed.

[0017] This conveying and sealing method uses the markings on the surface of the packaging material as a positioning reference. The control mechanism controls the feeding mechanism to convey materials intermittently and at fixed lengths based on the feedback signals from the markings. This can eliminate the cumulative conveying error in real time and ensure that the dimensions of each sealing unit are uniform. Both the longitudinal sealing and transverse sealing processes are carried out during the conveying intervals. The packaging material is in a static state when the heat-pressing is completed, resulting in uniform sealing force and better sealing performance. Furthermore, there is no need to configure a follow-up tracking mechanism, which simplifies the overall mechanical structure of the machine and effectively reduces the equipment manufacturing cost and control complexity.

[0018] S3 and S4 are executed synchronously. Executing the longitudinal sealing step and the transverse sealing step simultaneously, compared to the sequential operation of the two processes, eliminates the need to occupy the conveying intervals in segments, shortening the static time of the packaging material within a single work cycle and accelerating the overall processing speed. The longitudinal sealing mechanism and the transverse sealing mechanism are arranged independently in separate zones, enabling them to complete the sealing action simultaneously during the same conveying interval, avoiding idle waiting at workstations, fully utilizing the processing capacity of each mechanism, and achieving a higher overall equipment utilization rate. Compared with the prior art, the beneficial effects of the present invention are as follows: the control mechanism controls the feeding mechanism to intermittently convey packaging materials according to the identification information read by the identification device, so that each conveying stroke corresponds precisely to the identification spacing, and the conveying error is eliminated in real time with the identification as the reference. This effectively avoids the accumulation of errors caused by factors such as slippage, thermal expansion and contraction, and transmission gaps, ensuring accurate lateral sealing position and consistent size of each sealing unit. At the same time, the packaging material is in a stationary state during the conveying interval, and both longitudinal and lateral sealing are completed at fixed stations. There is no need to configure complex follow-up tracking components for the lateral sealing mechanism, which greatly simplifies the overall mechanical structure and control system, and reduces equipment manufacturing costs, debugging difficulty, and subsequent maintenance costs. In addition, when changing packaging materials of different specifications, only the control parameters and the position of the identification device need to be adjusted, without the need for a lot of manual mechanical calibration, which greatly shortens the changeover time and can well adapt to the flexible production needs of multiple specifications and small batches. The feeding mechanism drives the clamping device to perform linear reciprocating motion along the conveying direction of the packaging material through the first drive device, realizing an intermittent conveying cycle of "clamping-forward-release-reverse-reclamping". The clamping and forward phases are the conveying phases, and the release and reverse phases are the intermittent phases. All components of the feeding mechanism are integrated on the mounting plate, which is compact, easy to disassemble and assemble, and has a simple linear reciprocating motion logic and precise control. The identification device is slidably installed along the conveying direction via a slide rail slider, which can be freely adjusted according to the position of the mark without disassembling the main structure of the machine. The arc-shaped guide groove on the adjustment plate allows the identification head to be adjusted at multiple angles along the arc trajectory to ensure that it is always aligned with the mark reading area in the best posture, thereby improving the identification stability and accuracy. The longitudinal sealing mechanism integrates various components into a modular unit via a fixed plate. The pressing seat and the hot pressing head are arranged opposite each other, completing the longitudinal sealing during the conveying interval. After sealing, the hot pressing head moves away to avoid obstruction, reserving passage space for the next round of conveying. The material guide rollers on the pressing seat roll in the same direction as the conveying direction, which can significantly reduce friction, avoid scratching and damage to the surface of the packaging material, and ensure the integrity of the finished product's appearance and the barrier performance of the composite layer. The transverse sealing mechanism drives the first mounting seat through a single set of power components, and drives the second mounting seat to slide synchronously in the opposite direction through a linkage assembly, realizing the opening and closing of the two transverse sealing heads in opposite directions. This reduces the configuration of drive components, simplifies the electrical control logic, and reduces equipment costs. The linkage assembly is a purely mechanical rigid linkage, and the movement sequence is forcibly constrained by the mechanical structure, with no action time difference, ensuring that the opening and closing height of the sealing heads is synchronized, the sealing force is uniform, and the forming quality is stable.This conveying and sealing method uses the marker as a positioning reference. The control mechanism controls intermittent fixed-length conveying based on the marker feedback signal, corrects accumulated errors in real time, and ensures that the dimensions of each sealing unit are uniform. Both longitudinal and transverse sealing are completed in a stationary state during the conveying interval, resulting in better sealing performance. Furthermore, there is no need to configure a follow-up tracking mechanism, which simplifies the structure of the whole machine and reduces equipment manufacturing costs and control complexity. The longitudinal and transverse sealing are performed synchronously, without the need to occupy the interval in segments, which shortens the stationary time of a single cycle, speeds up the overall processing cycle, and increases the overall utilization rate of the equipment. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the present invention.

[0020] Figure 2 This is a structural diagram of the feeding mechanism.

[0021] Figure 3 This is a structural diagram of the feeding mechanism from another angle.

[0022] Figure 4 This is a structural diagram of the first drive unit.

[0023] Figure 5 This is a structural diagram of the clamping device and guide wheel assembly.

[0024] Figure 6 This is a structural diagram of the sliding component and the identification device.

[0025] Figure 7 This is a structural diagram of the longitudinal sealing mechanism.

[0026] Figure 8 This is a structural diagram of the fixed plate.

[0027] Figure 9 This is a structural diagram of the pressing seat.

[0028] Figure 10 This is a structural diagram of the second drive unit.

[0029] Figure 11 A structural diagram showing the installation of a first linear bearing within the guide hole.

[0030] Figure 12 This is a structural diagram of the lateral sealing mechanism.

[0031] Figure 13 This is a structural diagram of the lateral sealing mechanism from another angle.

[0032] Figure 14 This is an enlarged view of the linkage assembly.

[0033] Figure 15 This is a structural diagram of the first horizontal end cap.

[0034] Figure 16 This is a schematic diagram of the lateral sealing mechanism in operation.

[0035] 10. Longitudinal sealing mechanism; 20. Feeding mechanism; 30. Transverse sealing mechanism; 120. Mounting plate; 121. Through hole; 122. Guide wheel; 200. Clamping device; 210. Fixed base; 211. Connecting arm; 220. First clamping drive component; 230. Second clamping drive component; 240. First clamping plate; 250. Second clamping plate; 300. First drive device; 310. Power mechanism; 311. Conveyor motor; 312. Drive wheel; 313. Driven wheel; 314. Synchronous belt; 320. Guide mechanism; 321. Guide rail; 322. Guide block; 323. Limit sensor; 400. Identification device; 410. Slide rail; 420. Slider; 430. Adjusting plate; 431. Arc-shaped guide groove; 440. Identification head; 110. Fixed plate; 111. Guide through hole; 112. First longitudinal... Linear bearing, 510, pressing seat, 520, hot press head, 530, material guide wheel, 600, second drive device, 610, linear drive element, 620, connecting frame, 621, first connecting plate, 622, guide shaft, 623, second connecting plate, 630, mounting platform, 130, frame, 131, first side plate, 132, second side plate, 133, third side plate, 134, fourth side plate, 160, transverse sealing slide bar, 700, third drive device, 710, transverse sealing motor, 720, lead screw, 730, nut seat, 810, first mounting seat, 811, second linear bearing, 820, second mounting seat, 830, first transverse end, 831, protruding strip, 840, second transverse end, 900, connecting rod assembly, 910, first connecting rod, 920, second connecting rod, 930, third connecting rod. Detailed Implementation

[0036] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the invention. To better illustrate the following embodiments, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions; it is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0037] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Example 1 like Figure 1 As shown, a packaging material conveying and sealing device is used to convey packaging materials and seal them to form multiple continuous sealing units. The packaging material is cylindrical, and its outer surface is provided with multiple equally spaced markings. The conveying and sealing device includes a longitudinal sealing mechanism 10, a feeding mechanism 20, a transverse sealing mechanism 30, and a control mechanism (not shown). The longitudinal sealing mechanism 10, the feeding mechanism 20, and the transverse sealing mechanism 30 are all electrically connected to the control mechanism. The longitudinal sealing mechanism 10 is located upstream of the feeding mechanism 20 and is used to seal the two longitudinal overlapping edges of the packaging material. The transverse sealing mechanism 30 is located downstream of the feeding mechanism 20 and is used to perform transverse sealing of the packaging material to form continuous sealing units. The feeding mechanism 20 includes an identification device 400, which is used to read the markings on the packaging material and feed the marking information back to the control mechanism. The control mechanism controls the feeding mechanism 20 to intermittently convey the packaging material according to the marking information. After the packaging material is sealed longitudinally and laterally by this equipment, it is conveyed to an external cutting mechanism for cutting, resulting in individual packages.

[0039] Specifically, such as Figure 2 , Figure 3 As shown, the feeding mechanism 20 further includes a mounting plate 120, a clamping device 200, and a first driving device 300; the mounting plate 120 is a vertically arranged plate structure; the clamping device 200 is movably disposed on the mounting plate 120 for clamping or releasing the packaging material; the first driving device 300 is fixed on the mounting plate 120 and is connected to the clamping device 200 for driving the clamping device 200 to perform linear reciprocating motion along the packaging material conveying direction; the identification device 400 is disposed on the mounting plate 120 and located on the packaging material conveying path.

[0040] like Figure 4 As shown, the mounting plate 120 has a front side and a rear side; the mounting plate 120 has two parallel, elongated through holes 121 extending vertically, and the two through holes 121 are symmetrically distributed to ensure balanced force distribution.

[0041] like Figure 4As shown, the first driving device 300 is located on the rear side of the mounting plate 120, and includes a power mechanism 310 and a guide mechanism 320. The power mechanism 310 includes a conveyor motor 311, a driving wheel 312, a driven wheel 313, and a synchronous belt 314. The driving wheel 312 is rotatably mounted on the upper side of the mounting plate 120 and is located between two elongated through holes 121. The driven wheel 313 is rotatably mounted on the lower side of the mounting plate 120 and is located directly below the driving wheel 312. The synchronous belt 314 is wound around the driving wheel 312 and the driven wheel 313. The conveyor motor 311 is fixedly mounted on the upper side of the mounting plate 120, and its output shaft is connected to the driving wheel 312 to provide transmission power. The guiding mechanism 320 includes a guide rail 321 and a guide block 322. There are two guide rails 321, each vertically fixed to the left and right outer sides of two elongated through holes 121, with the extension direction of the guide rails 321 parallel to the extension direction of the elongated through holes 121. The guide block 322 is slidably disposed on the guide rail 321 and fixedly connected to the synchronous belt 314, realizing the linkage between the synchronous belt 314 and the guide block 322. When the conveyor motor 311 starts working, its output shaft drives the drive wheel 312 to rotate, thereby driving the synchronous belt 314 to circulate vertically. The synchronous belt 314 drives the guide block 322 to perform stable vertical linear reciprocating motion along the guide rail 321.

[0042] like Figure 5As shown, the clamping device 200 is disposed on the front side of the mounting plate 120, and includes a fixing base 210, a first clamping drive member 220, a second clamping drive member 230, a first clamping plate 240, and a second clamping plate 250. The fixing base 210 is disposed on the front side of the mounting plate 120, and the fixing base 210 extends toward the rear side of the mounting plate 120 to form an extension structure. This extension structure consists of two connecting arms 211, which pass through two elongated through holes 121 and are fixedly connected to the guide block 322 on the rear side of the mounting plate 120. The first clamping drive component 220, the second clamping drive component 230, the first clamping plate 240, and the second clamping plate 250 are all installed on the fixed base 210 at the front side of the mounting plate 120. The first clamping drive component 220 and the second clamping drive component 230 are fixedly installed on the fixed base 210. The first clamping plate 240 is connected to the output end of the first clamping drive component 220, and the second clamping plate 250 is connected to the output end of the second clamping drive component 230. The first clamping plate 240 and the second clamping plate 250 are arranged opposite to each other to cooperate in completing the clamping and releasing action of the packaging material. When the guide block 322 makes a linear reciprocating motion in the vertical direction, the clamping device 200 can synchronously make a linear reciprocating motion in the vertical direction under the linkage of the fixed base 210 and the guide block 322, thereby driving the clamped cylindrical packaging material to achieve intermittent vertical conveying, accurately matching the processing rhythm of the downstream cutting and horizontal sealing stations. Since the packaging material is cylindrical, to increase the clamping contact area, ensure uniform clamping force, and prevent slippage and damage to the outer wall of the packaging material during transport, the opposing clamping sides of the first clamping plate 240 and the second clamping plate 250 are both set as arc-shaped surfaces, and the curvature of the two arc-shaped surfaces is adapted to the outer curvature of the cylindrical packaging material. When the first clamping drive member 220 and the second clamping drive member 230 drive the first clamping plate 240 and the second clamping plate 250 to close towards each other, the two arc-shaped clamping surfaces enclose a cylindrical clamping space that fits the shape of the packaging material, achieving full circumferential fitting clamping of the cylindrical packaging material.

[0043] Furthermore, an elastic buffer layer (not shown) is provided on the opposing arc-shaped clamping sides of the first clamping plate 240 and the second clamping plate 250. The elastic buffer layer can increase the friction coefficient of the clamping contact surface, improve the anti-slip effect, and effectively improve the clamping stability; at the same time, the deformation generated by the elastic buffer layer under pressure can buffer the clamping impact, and can also compensate for the outer diameter tolerance between packaging materials, avoiding scratches and crushing of the outer wall of the packaging material caused by direct squeezing by the rigid clamping plate.

[0044] To prevent damage to components due to overtravel, a limit sensor 323 is installed on the rear side of the mounting plate 120, at the position corresponding to the upper end of the guide rail 321. Figure 4As shown. The limit sensor 323 is electrically connected to the control device and can detect the travel position of the guide block 322 in real time and provide feedback signals. When the guide block 322 moves upward with the synchronous belt 314 to the upper limit position of the guide rail 321, the limit sensor 323 is triggered immediately and sends a signal to the control device. After receiving the signal, the control device promptly cuts off the power output of the conveyor motor 311 and controls the guide block 322 to stop feeding, thereby effectively avoiding the guide block 322 from overtravel and collision, ensuring the safety and service life of the mechanism.

[0045] like Figure 5 As shown, a guide wheel assembly is also provided in the upper area of ​​the front side of the mounting plate 120. The guide wheel assembly includes two guide wheels 122 with parallel axes arranged at intervals. The outer circumferential surfaces of the two guide wheels 122 are both machined into arc shapes and are arranged opposite each other. The two arc-shaped wheel surfaces together form a circular or near-circular conveying channel adapted to cylindrical packaging materials. The packaging materials to be conveyed pass through the conveying channel between the two guide wheels 122. The central axis of this conveying channel coincides with the center line of the cylindrical clamping space formed after the first clamping plate 240 and the second clamping plate 250 are closed, so as to ensure that the packaging materials are coaxially centered throughout the conveying process and avoid the packaging materials from tilting or deviating.

[0046] like Figure 6 As shown, a sliding assembly is also provided on the front side of the mounting plate 120, and the identification device 400 is mounted on the mounting plate 120 via the sliding assembly. The sliding assembly includes a slide rail 410 and a slider 420. The slide rail 410 is located vertically between the guide wheel assembly and the clamping device 200 and extends vertically. The slider 420 is slidably mounted on the slide rail 410 and can slide up and down along the slide rail 410 to achieve height adjustment. The identification device 400 is fixedly mounted on the slider 420 and can rise and fall synchronously with the slider 420.

[0047] The identification device 400 includes an adjustment plate 430 and an identification head 440. The adjustment plate 430 has an arc-shaped structure with an arc-shaped guide groove 431 on its surface. The identification head 440 is slidably mounted on the adjustment plate 430 and can move along the arc-shaped guide groove 431 to adjust the identification angle. The identification head 440 is positioned directly opposite the conveying path of the cylindrical packaging material and is used to collect the marking information set on the surface of the packaging material. Through the dual adjustment structure of the sliding component and the arc-shaped guide groove 431, the height and detection angle of the identification head 440 can be precisely adjusted according to the marking position of cylindrical packaging materials of different specifications, ensuring the stability and reliability of marking reading.

[0048] When the feeding mechanism is working, cylindrical packaging materials are conveyed downwards from the conveying channel of the upper guide wheel assembly. The identification head 440 scans the markings on the surface of the packaging materials in real time and transmits the signals to the control device. The control device outputs instructions according to the preset distance parameters of the markings. First, it controls the first clamping drive 220 and the second clamping drive 230 to drive the first clamping plate 240 and the second clamping plate 250 to close and clamp the material. Then, it starts the conveying motor 311, which drives the guide block 322 and the clamping device 200 to move downwards through the synchronous belt 314 to complete the fixed-length feeding. After the preset conveying stroke is reached, the control device controls the clamping plate to release, and the conveying motor 311 reverses to drive the clamping device 200 to move upwards to reset, completing a single intermittent feeding cycle. The entire identification, clamping, and conveying process forms a closed-loop control system. It relies on precise matching of the cutting length using identification signals, eliminating cumulative errors caused by pipe slippage and thermal expansion and contraction. When changing to cylindrical packaging materials of different diameters and identification spacing, only the conveyor motor stroke parameters need to be modified via the control device, while simultaneously adjusting the 440° height and identification angle of the identification head for rapid material changeover, adapting to flexible production across multiple specifications. After a single conveying operation, the packaging material remains stationary, entering an intermittent period for longitudinal and transverse sealing operations.

[0049] like Figure 7 As shown, the longitudinal sealing mechanism 10 includes a fixed plate 110, a pressing seat 510, a hot pressing head 520, and a second driving device 600. The fixed plate 110 is also a vertically arranged plate structure, installed above the mounting plate 120, and also has a front side and a rear side. The pressing seat 510 is fixedly installed on the front side of the fixed plate 110. The hot pressing head 520 is disposed on the second driving device 600 and is arranged directly opposite the pressing seat 510. The second driving device 600 can drive the hot pressing head 520 to move closer to or away from the pressing seat 510.

[0050] like Figure 8 As shown, the fixing plate 110 has a through guide hole 111. The pressing seat 510 is fixed to the front side of the fixing plate 110 by screws; the pressing seat 510 is provided with a material feeding guide wheel 530, which protrudes from the surface of the pressing seat 510 facing the hot pressing head 520, and its rolling direction is consistent with the conveying direction of the packaging material. Preferably, as shown... Figure 9 As shown, the pressing seat 510 is a long strip-shaped component, vertically fixed on the fixing plate 110; multiple material feeding guide rollers 530 are provided, arranged sequentially along the vertical direction. The hot pressing head 520 can be a high-frequency sealing head, suitable for aluminum-containing packaging materials, or an ultrasonic sealing head, suitable for aluminum-free packaging materials. The hot pressing head 520 is generally long and strip-shaped, located in front of the fixing plate 110, and directly opposite the pressing seat 510.

[0051] like Figure 10As shown, the second driving device 600 includes a linear drive element 610, a connecting frame 620, and a mounting platform 630. The linear drive element 610 can be a linear output power element such as a cylinder, electric push rod, or linear motor, or it can use a motor screw module to convert rotational motion into linear motion. In this embodiment, the linear drive element 610 uses a motor screw module. The linear drive element 610 is fixedly mounted on the fixed plate 110. The connecting frame 620 is connected to the output end of the linear drive element 610. The mounting platform 630 is fixed on the connecting frame 620, and the hot press head 520 is disposed on the mounting platform 630. Preferably, the linear drive element 610 is disposed on the back of the fixed plate 110, and the connecting frame 620 penetrates the fixed plate 110, with one end located behind the fixed plate 110 and the other end located in front of the fixed plate 110. The portion located behind the fixed plate 110 is connected to the output end of the linear drive element 610, and the portion located in front of the fixed plate 110 is connected to the mounting platform 630.

[0052] Specifically, the connecting frame 620 includes a first connecting plate 621, a guide shaft 622, and a second connecting plate 623. The first connecting plate 621 is located behind the fixed plate 110 and is securely connected to the output end of the linear drive element 610. The guide shaft 622 passes through the fixed plate 110 via the guide through hole 111, with its rear end fixed to the first connecting plate 621 and its front end connected to the second connecting plate 623 located in front of the fixed plate 110. The mounting platform 630 is disposed on the second connecting plate 623. In this embodiment, two guide shafts 622 are provided, and two guide through holes 111 are correspondingly provided. The two guide shafts 622 are symmetrically arranged on both sides of the pressing seat 510. The two guide shafts 622, together with the first connecting plate 621 and the second connecting plate 623, constitute a rigid frame structure, ensuring that the hot press head 520 is subjected to uniform force on both sides and does not tilt during movement.

[0053] Furthermore, such as Figure 11 As shown, a first linear bearing 112 is provided in the guide through hole 111 of the fixed plate 110. The guide shaft 622 passes through the first linear bearing 112 and reciprocates along the axis. The first linear bearing 112 can provide radial limiting and axial guidance for the guide shaft 622, prevent the guide shaft 622 from swinging laterally, and reduce motion friction.

[0054] A heat insulation pad (not shown) is provided between the hot press head 520 and the mounting platform 630. The heat insulation pad can isolate high temperature and prevent the heat of the hot press head 520 from being conducted to the mounting platform 630, the connecting frame 620 and the linear drive element 610, so as to avoid the components of the drive device 600 from being deformed and aged by heat.

[0055] When the packaging material is in the intermittent conveying phase, the longitudinal sealing mechanism 10 starts operating. During operation, the packaging material is conveyed vertically from top to bottom, passing between the pressing seat 510 and the hot pressing head 520. The second drive device 600 drives the hot pressing head 520 closer to the pressing seat 510, pressing the two longitudinal overlapping edges of the packaging material between the hot pressing head 520 and the pressing seat 510. At the same time, the hot pressing head 520 is energized to generate heat, causing the overlapping parts to melt and bond, completing the longitudinal sealing operation of the packaging material. After sealing, the second drive device 600 drives the hot pressing head 520 away from the pressing seat 510, and the packaging material continues to flow.

[0056] like Figure 12 As shown, the transverse sealing mechanism 30 includes a frame 130, a third drive device 700, a first mounting base 810, and a second mounting base 820. A transverse sealing slide bar 160 is provided on the frame 130. Both the first mounting base 810 and the second mounting base 820 are slidably mounted on the transverse sealing slide bar 160 and can slide along it. A first transverse sealing head 830 is provided on the first mounting base 810, and a second transverse sealing head 840 is provided on the second mounting base 820; the first transverse sealing head 830 and the second transverse sealing head 840 are arranged opposite to each other. The third drive device 700 is mounted on the frame 130, and its output end is connected to the first mounting base 810, for driving the first mounting base 810 to perform linear reciprocating motion along the transverse sealing slide bar 160. A connecting rod assembly 900 is also provided between the first mounting base 810 and the second mounting base 820. When the third driving device 700 drives the first mounting base 810 to perform linear reciprocating motion, the connecting rod assembly 900 can drive the second mounting base 820 to perform linear motion along the transverse sealing slide bar 160 in the opposite direction to that of the first mounting base 810.

[0057] Specifically, such as Figure 13 As shown, the frame 130 is installed below the mounting plate 120 and includes a first side plate 131, a second side plate 132, a third side plate 133, and a fourth side plate 134. The first side plate 131, the second side plate 132, the third side plate 133, and the fourth side plate 134 together form a rectangular frame structure. The horizontal sealing slide rod 160 is a cylindrical structure, with its two ends respectively disposed on the first side plate 131 and the third side plate 133. Preferably, multiple horizontal sealing slide rods 160 are provided, and the multiple horizontal sealing slide rods 160 are arranged parallel and symmetrically on both sides of the first side plate 131 and the third side plate 133. In this embodiment, there are two horizontal sealing slide rods 160, respectively disposed on the left and right sides of the first side plate 131 and the third side plate 133, and parallel to the second side plate 132 and the fourth side plate 134.

[0058] The first mounting base 810 and the second mounting base 820 are set in a rectangular frame structure. Both are long strip-shaped block components. A through hole is opened at each of the left and right ends of the first mounting base 810 and the second mounting base 820. A second linear bearing 811 is installed in the through hole, and two horizontal sealing rods 160 are respectively inserted into the corresponding second linear bearings 811.

[0059] The first horizontal sealing head 830 and the second horizontal sealing head 840 are arranged opposite to each other. Both are long strips and are respectively arranged on the opposite side of the first mounting base 810 and the second mounting base 820, and are respectively located in the middle of the first mounting base 810 and the second mounting base 820, so that the two horizontal sealing slide rods 160 are symmetrically distributed on their left and right sides.

[0060] The third drive device 700 includes a horizontal sealing motor 710, a lead screw 720, and a nut seat 730. The horizontal sealing motor 710 is fixedly mounted on the first side plate 131. The lead screw 720 is connected to the output end of the horizontal sealing motor 710. The nut seat 730 is fixed to the middle of the first mounting base 810 and threaded onto the lead screw 720. When the horizontal sealing motor 710 operates, it drives the lead screw 720 to rotate, causing the nut seat 730 and the first mounting base 810 connected to it to perform linear reciprocating motion through the threaded action. It is understood that the third drive device 700 can also be a cylinder, an electric push rod, or other similar device.

[0061] In this embodiment, two linkage assemblies 900 are provided, located on the left and right sides of the first mounting base 810 and the second mounting base 820, respectively. Specifically, as... Figure 14 As shown, the linkage assembly 900 includes a first link 910, a second link 920, and a third link 930. Located to the left of the first mounting base 810 and the second mounting base 820, the linkage assembly 900 has its second link 920 hinged at the middle to the inner wall of the second side plate 132; one end of the first link 910 hinged to the left end of the first mounting base 810, and the other end hinged to one end of the second link 920; one end of the third link 930 hinged to the left end of the second mounting base 820, and the other end hinged to the other end of the second link 920. The connecting rod assembly 900, located to the right of the first mounting base 810 and the second mounting base 820, has its second connecting rod 920 hinged at the middle to the inner wall of the fourth side plate 134. One end of its first connecting rod 910 is hinged to the right end of the first mounting base 810, and the other end is hinged to one end of the second connecting rod 920. One end of its third connecting rod 930 is hinged to the right end of the second mounting base 820, and the other end is hinged to the other end of the second connecting rod 920. The hinge points of the first connecting rod 910 and the second connecting rod 920, and the hinge points of the third connecting rod 930 and the second connecting rod 920, are located on either side of the hinge points of the second connecting rod 920 with the second side plate 132 and the fourth side plate 134, respectively.

[0062] Preferably, such as Figure 15 The first horizontal seal 830 has two parallel and spaced-apart raised strips 831 on the side facing the second horizontal seal 840, extending along the length of the first horizontal seal 830. During sealing, the two raised strips 831 simultaneously form two parallel horizontal sealing lines on the packaging material. After the horizontal sealing is completed, the cutter of the subsequent cutting mechanism cuts between the two sealing lines, with one sealing line serving as the upper seal of the front bag and the other as the lower seal of the rear bag. The first horizontal seal 830 and the second horizontal seal 840 can be high-frequency seals, suitable for aluminum-containing packaging materials; or they can be ultrasonic seals, suitable for aluminum-free packaging materials.

[0063] During the intermittent conveying period, the transverse sealing mechanism 30 simultaneously performs sealing operations; such as Figure 16 As shown, when the transverse sealing mechanism is working, the transverse sealing motor 710 drives the lead screw 720 to rotate, and the nut seat 730 drives the first mounting seat 810 to move forward along the transverse sealing slide 160. The first mounting seat 810 pushes the second connecting rod 920 to rotate around the hinge point in its middle through the first connecting rod 910. The other end of the second connecting rod 920 swings in the opposite direction, and drives the second mounting seat 820 to move backward along the transverse sealing slide 160 through the third connecting rod 930. This causes the first transverse sealing head 830 and the second transverse sealing head 840 to approach each other from both sides simultaneously, pressing the packaging material between them and performing heat sealing. After sealing is completed, the transverse sealing motor 710 rotates in the opposite direction, and the first mounting seat 810 and the second mounting seat 820 move away from each other in opposite directions, and the packaging material continues to feed.

[0064] Example 2 This embodiment provides a method for conveying and sealing packaging materials, implemented using the packaging material conveying and sealing equipment described in the above embodiment. It is used for intermittent conveying and continuous sealing of tubular packaging materials with equally spaced markings on their surface. Specifically, it includes the following steps: S1. Identification Steps: During equipment operation, the identification device 400 reads the marking information on the surface of the packaging material at the current workstation in real time and feeds back the collected marking signals to the control mechanism in real time, providing a reference for fixed-length conveying. Here, the current workstation refers to the conveying workstation corresponding to the feeding mechanism.

[0065] S2. Intermittent Conveying Step: The control mechanism outputs control commands based on the received identification information, controlling the feeding mechanism 20 to precisely convey the packaging material forward a set distance; this set distance can be set as a single identification spacing or multiple identification spacings according to production needs. After conveying is completed, the feeding mechanism 20 pauses feeding, keeping the packaging material stationary, and enters the intermittent conveying period.

[0066] S3, Longitudinal Sealing Step: During the intermittent conveying period, the longitudinal sealing mechanism 10 seals the two longitudinal overlapping edges of the stationary packaging material at the current workstation, causing the longitudinal overlapping position of the packaging material to melt and bond together. Here, the current workstation refers to the longitudinal sealing workstation corresponding to the longitudinal sealing mechanism.

[0067] S4. Lateral Sealing Step: During the intermittent conveying period, the lateral sealing mechanism 30 performs lateral sealing on the stationary packaging material at the current workstation. A single lateral sealing action can simultaneously form the rear end seal of the current sealing unit and the front end seal of the next sealing unit. Here, the current workstation refers to the lateral sealing workstation corresponding to the lateral sealing mechanism.

[0068] In this embodiment, steps S3 and S4 are both completed during the conveying interval of the feeding mechanism 20. This conveying interval is specifically the time period during which the clamping device 200 releases the material and then retracts with the first driving device 300 after resetting. Alternatively, it can be set as the static pause period of the clamping device 200 and the first driving device 300, according to the control logic. As a preferred embodiment, this embodiment selects the time period after the clamping device 200 releases and retracts as the sealing operation window, and simultaneously controls steps S3 and S4 to be executed synchronously. This eliminates the need for segmented interruptions, effectively shortening the static time of the packaging material in a single work cycle and significantly improving the overall processing cycle time and production efficiency.

[0069] S5. Cyclic Processing Steps: Repeat steps S1 to S4 sequentially. Through a cyclic operation mode of real-time positioning with marking, intermittent fixed-length feeding, and synchronous longitudinal and transverse sealing operations, the packaging materials are conveyed and sealed segment by segment, achieving continuous and high-precision automated sealing.

[0070] This method uses equally spaced markings on the surface of packaging materials as positioning references. Through closed-loop control of the markings, it controls intermittent fixed-length conveying, which can offset the cumulative errors caused by conveyor slippage, thermal expansion and contraction, and transmission gaps in real time, ensuring that the size of each sealing unit is uniform. At the same time, all sealing operations are completed when the material is stationary, resulting in precise sealing position, uniform sealing pressure, and good sealing stability. Furthermore, it eliminates the need for a follow-up sealing structure, greatly simplifying the mechanical structure and control logic of the equipment. The synchronous operation of longitudinal and transverse sealing maximizes the use of intermittent time, resulting in high equipment utilization and fast production cycle, making it suitable for flexible production scenarios with multiple specifications and small batches.

[0071] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention should be included within the protection scope of the claims of the present invention.

Claims

1. A packaging material conveying and sealing device, used to convey packaging materials and seal the packaging materials to form multiple continuous sealing units; the packaging material is in the shape of a cylindrical tube, and its outer surface is provided with multiple equally spaced markings; characterized in that, The conveying and sealing equipment includes a longitudinal sealing mechanism, a feeding mechanism, a transverse sealing mechanism, and a control mechanism. The longitudinal sealing mechanism, the feeding mechanism, and the transverse sealing mechanism are all electrically connected to the control mechanism. The longitudinal sealing mechanism is located upstream of the feeding mechanism and is used to seal the two longitudinal edges of the packaging material. The feeding mechanism includes an identification device for reading markings on the packaging material. The control mechanism controls the feeding mechanism to intermittently convey the packaging material based on the marking information collected by the identification device. The transverse sealing mechanism is located downstream of the feeding mechanism and is used to transversely seal the conveyed packaging material.

2. The packaging material conveying and sealing equipment according to claim 1, characterized in that, The feeding mechanism includes a mounting plate, a clamping device, and a first driving device. The clamping device is movably mounted on the mounting plate and is used to clamp or release packaging materials. The first driving device is fixed on the mounting plate and connected to the clamping device, and is used to drive the clamping device to perform linear reciprocating motion along the conveying direction of the packaging materials.

3. The packaging material conveying and sealing equipment according to claim 2, characterized in that, The identification device is mounted on the mounting plate via a sliding assembly, which includes a slide rail and a slider. The slide rail is fixed to the mounting plate and extends along the conveying direction of the packaging material, while the slider is slidably mounted on the slide rail.

4. The packaging material conveying and sealing equipment according to claim 3, characterized in that, The identification device includes an adjustment plate and an identification head. The adjustment plate is fixedly mounted on the slider and has an arc-shaped guide groove. The identification head is slidably disposed in the arc-shaped guide groove.

5. The packaging material conveying and sealing equipment according to any one of claims 1-4, characterized in that, The longitudinal sealing mechanism includes a fixed plate, a pressing seat, a second driving device, and a hot pressing head. The fixed plate has a front side and a rear side. The pressing seat is fixedly installed on the front side of the fixed plate. The hot pressing head is disposed on the second driving device and is arranged opposite to the pressing seat. The second driving device can drive the hot pressing head to move closer to or away from the pressing seat.

6. The packaging material conveying and sealing equipment according to claim 5, characterized in that, The pressing seat is equipped with a material guide wheel, which protrudes from the surface of the pressing seat facing the hot pressing head, and the rolling direction of the material guide wheel is consistent with the conveying direction of the packaging material.

7. The packaging material conveying and sealing equipment according to any one of claims 1-4, characterized in that, The transverse sealing mechanism includes a frame, a third drive device, a first mounting base, and a second mounting base. A transverse sealing slide bar is provided on the frame, and both the first and second mounting bases are slidably mounted on the transverse sealing slide bar. A first transverse sealing head is provided on the first mounting base, and a second transverse sealing head is provided on the second mounting base, with the first and second transverse sealing heads positioned opposite each other. The third drive device is mounted on the frame, and its output end is connected to the first mounting base, used to drive the first mounting base to perform linear reciprocating motion along the transverse sealing slide bar. A connecting rod assembly is provided between the first and second mounting bases. When the first mounting base performs linear reciprocating motion, the connecting rod assembly drives the second mounting base to perform a motion along the transverse sealing slide bar in the opposite direction to that of the first mounting base.

8. The packaging material conveying and sealing equipment according to claim 7, characterized in that, The linkage assembly includes a first linkage, a second linkage, and a third linkage. The second linkage is rotatably mounted on the frame. One end of the first linkage is hinged to a first mounting base, and the other end is hinged to one end of the second linkage. One end of the third linkage is hinged to a second mounting base, and the other end is hinged to the other end of the second linkage.

9. A method for conveying and sealing packaging materials, characterized in that, The method of implementation using the device as described in any one of claims 1-8 includes the following steps: S1. Identification Step: The identification device reads the markings on the surface of the packaging material at the current workstation and feeds the marking information back to the control mechanism. S2, Intermittent conveying step: The control mechanism controls the feeding mechanism to convey the packaging material forward a set distance according to the received identification information; S3, Longitudinal sealing step: The longitudinal sealing mechanism seals the two longitudinal edges of the packaging material at the current workstation; S4, Lateral sealing step: The lateral sealing mechanism performs lateral sealing on the packaging material at the current station, forming the rear end seal of the current sealing unit and the front end seal of the next sealing unit respectively. Both S3 and S4 are performed during the conveying intervals of the feeding mechanism; S5. Repeat S1 to S4, conveying and sealing segment by segment until the continuous processing of packaging materials is completed.

10. The packaging material conveying and sealing method according to claim 9, characterized in that, S3 and S4 are executed synchronously.

Images