A vertical packaging machine

Abstract

The utility model provides a kind of vertical packing machine, it is related to vertical packing machine technical field, including unwinding and feeding film device, film drawing forming device, continuous longitudinal sealing device and double-crank pursuit shearing horizontal sealing device, unwinding and feeding film device includes unwinding mechanism and roll diameter detection mechanism, unwinding mechanism can be bag film to the film drawing forming device of conveying, roll diameter detection mechanism real-time detection roll film diameter;Film drawing forming device and continuous longitudinal sealing device are set in the downstream position of unwinding and feeding film device, film drawing forming device includes the feeding mechanism for filling and placing to be packaged material and the forming mechanism for bag film forming;Continuous longitudinal sealing device corresponds forming mechanism;Double-crank pursuit shearing horizontal sealing device is set in the downstream position of film drawing forming device and continuous longitudinal sealing device;The utility model can effectively improve the stability of unwinding, optimize longitudinal sealing continuity and reliability, improve the precision and efficiency of horizontal sealing pursuit shearing, not only packaging efficiency is efficient, and packaging effect is remarkable.

Description

Technical Field

[0001] This utility model relates to the field of vertical packaging machine technology, and specifically to a vertical packaging machine. Background Technology

[0002] Vertical packaging machines are key packaging equipment in industries such as food, pharmaceuticals, and daily necessities. Their core function is to process continuous film into individual packaging bags through processes such as unwinding, forming, sealing, and cutting. The workflow of existing vertical packaging machines typically includes: the unwinding mechanism releases the film, which is folded into a cylindrical shape by the forming mechanism; the longitudinal sealing device completes the longitudinal sealing to form a continuous bag; and the transverse sealing device performs transverse sealing and cutting at a preset position on the bag, ultimately forming a sealed packaging bag.

[0003] However, the existing technology has the following problems: I. Insufficient unwinding stability: The unwinding speed of the unwinding mechanism is mostly fixed or simply adjusted by following the roll, without being dynamically adjusted in conjunction with the real-time diameter of the film. When the diameter of the film decreases during the unwinding process (from full roll to empty roll), if the unwinding speed is not properly matched, it can easily lead to fluctuations in the film tension, causing the film to stretch, wrinkle, or loosen, affecting the accuracy of subsequent forming and sealing.

[0004] II. Poor synergy between longitudinal sealing and membrane stretching: Some vertical packaging machines use intermittent sealing structures (such as plate-type longitudinal sealing) for their longitudinal sealing devices. This differs from the rhythm of the continuous film feeding action of the film pulling device, which can easily cause discontinuous longitudinal seals and uneven sealing strength. Especially in high-speed packaging scenarios, problems such as leaks and bag breaks are likely to occur.

[0005] 3. Low precision in horizontal sealing and shearing: Traditional horizontal sealing devices often use a single crank or cam drive structure, which results in poor synchronization between the movement trajectory of the horizontal sealing knife and the speed of the bag conveyor. During the follow-up cutting process, speed matching errors can easily lead to deviation of the horizontal sealing position and uneven cutting. This error accumulation is more pronounced when the packaging speed increases, affecting the appearance and sealing performance of the packaging bag.

[0006] Therefore, improving unwinding stability, optimizing the synergy between longitudinal sealing and film stretching, and enhancing transverse sealing and shearing accuracy have become key issues in improving the packaging quality and efficiency of vertical packaging machines. Utility Model Content

[0007] The purpose of this utility model is to provide a vertical packaging machine to solve the above-mentioned technical problems existing in the prior art; the preferred technical solution among the many technical solutions provided by this utility model can produce many technical effects, as detailed below.

[0008] To achieve the above objectives, the present invention provides the following technical solution: This utility model provides a vertical packaging machine, comprising an unwinding and film feeding device, a film stretching and forming device, a continuous longitudinal sealing device, and a double-crank follow-up shearing and horizontal sealing device. The unwinding and film feeding device includes an unwinding mechanism and a roll diameter detection mechanism. The unwinding mechanism conveys the film to the film stretching and forming device. The roll diameter detection mechanism detects the roll diameter in real time, and the unwinding mechanism adjusts the unwinding speed according to the roll diameter. The film stretching and forming device and the continuous longitudinal sealing device are located downstream of the unwinding and film feeding device. The film stretching and forming device includes a feeding mechanism for filling the material to be packaged and a forming mechanism for forming the film. The continuous longitudinal sealing device corresponds to the forming mechanism and performs longitudinal sealing on the formed film to form a bag body that runs vertically through the material. The double-crank follow-up shearing and horizontal sealing device is located downstream of the film stretching and forming device and performs horizontal sealing and follow-up shearing on the bag body to form a closed packaging bag.

[0009] Preferably, the vertical packaging machine includes a machine body, and the unwinding and film feeding device, the film stretching and forming device, the continuous longitudinal sealing device, and the double-crank follow-up shearing and horizontal sealing device are all disposed on the machine body.

[0010] Preferably, the vertical packaging machine includes a film feeding frame and a correction mechanism, wherein: a sliding component is fixedly installed on the film feeding frame, a guide component is installed on the machine body, and the sliding component is slidably sleeved on the guide component; the correction mechanism includes a correction motor and a correction actuator connected to the correction motor, the correction motor is equipped with an encoder, and the actuating end of the correction actuator is connected to the film feeding frame.

[0011] Preferably, the film feeding frame is provided with a film splicing mechanism, which includes a pneumatic telescopic assembly, a film splicing platform, a film pressing rod, a film splicing guide assembly, a pressing bracket, an adhesive tape bonding plate, and a film pressing shaft. The film splicing platform is located on the film feeding frame and downstream of the unwinding mechanism. The film pressing rod is located above the film splicing platform, and a plurality of first buffer rings are sequentially spaced along the axial direction on the film pressing rod. The pneumatic telescopic assembly is fixedly mounted on the film feeding frame, and its telescopic end is connected to the film pressing rod and can drive the film pressing rod to move. The guide assembly includes a guide... The film feeding frame and the movable connecting member are included. The guide member is fixedly mounted on the film feeding frame. The movable connecting member is slidably mounted on the guide member and connected to the film pressing rod. The film pressing shaft, the pressing bracket, and the adhesive tape bonding plate are all located above the film receiving platform. The pressing bracket is swayably mounted on the film feeding frame, and the movable connecting member abuts against the pressing bracket. The adhesive tape bonding plate is mounted on the pressing bracket. The film pressing shaft is fixedly mounted on the pressing bracket and located above the film receiving platform. Multiple second buffer rings are sequentially spaced along the axial direction on the film pressing shaft.

[0012] Preferably, the double-crank transverse heat sealing mechanism includes a heat sealing power assembly, a double-crank connecting rod assembly, and a heat sealing assembly, wherein: the heat sealing power assembly includes two symmetrically arranged and synchronously rotating output ends, each of the two output ends is connected to a double-crank connecting rod assembly, and both double-crank connecting rod assemblies are drively connected to the heat sealing assembly; the heat sealing assembly includes two heat sealing blades arranged opposite each other; the heat sealing power assembly can drive the two heat sealing blades to move towards or away from each other through the two double-crank connecting rod assemblies.

[0013] Preferably, the heat-sealing power assembly includes a vertical dual-output shaft steering motor, which has two coaxially arranged and synchronously rotating output shafts, each connected to one of the two double-crank connecting rod assemblies. The double-crank connecting rod assembly includes a oscillating member, a first crank connecting rod, and a second crank connecting rod. The oscillating member is fixedly positioned at its center on the corresponding output shaft and rotates synchronously with it. The first ends of the first and second crank connecting rods are rotatably connected to the two ends of the oscillating member, and the second ends of the first and second crank connecting rods are respectively connected to the two heat-sealing knife drives. The double-crank horizontal heat-sealing mechanism also includes two symmetrically arranged horizontal guide groups. The horizontal guide assembly includes a horizontal guide seat and a sliding shaft. The two heat sealing knives are respectively configured as a first heat sealing knife and a second heat sealing knife. The two horizontal guide seats are symmetrically arranged on both sides of the vertical double-output shaft steering motor. The end of the output shaft is rotatably mounted on the outer wall of the corresponding horizontal guide seat. The first end of the sliding shaft is connected to the linkage beam, and the second end of the sliding shaft slides through the horizontal guide seat and is connected to the first heat sealing beam. The second end of the first crank connecting rod is rotatably connected to the linkage beam. The first heat sealing knife is mounted on the first heat sealing beam, and the second end of the second crank connecting rod is rotatably connected to the second heat sealing beam. The second heat sealing beam is slidably mounted between the two horizontal guide seats, and the second heat sealing knife is mounted on the second heat sealing beam.

[0014] Preferably, the double-cranked trailing shear sealing device includes a telescopic cutting mechanism, which is disposed on the first heat-sealing beam and moves synchronously with the first heat-sealing beam; the telescopic cutting mechanism includes a cutting telescopic component and a serrated cutter, the cutting telescopic component is fixedly disposed on the first heat-sealing beam, the telescopic end of the cutting telescopic component is connected to the serrated cutter, a guide groove is provided through the first heat-sealing cutter in the horizontal direction, the serrated cutter passes through the guide groove and slides with the guide groove.

[0015] Preferably, the double-crank tracking and shearing horizontal sealing device includes a corner bag mechanism, which includes two corner bag assemblies arranged opposite to each other on both sides of the heat sealing assembly; the corner bag assembly includes a corner bag telescopic assembly and a corner plate assembly, the corner bag telescopic assembly is connected to the corner plate assembly and can drive the corner plate assembly to reciprocate.

[0016] Preferably, the double-crank tracking and shearing horizontal sealing device includes an anti-pinch mechanism, which includes two anti-pinch components arranged opposite to each other, each of which corresponds to one of the two heat-sealing knives; each anti-pinch component includes a movably arranged top block and an elastic element connected to the top block, the top block being used to pre-press the bag opening when the two heat-sealing knives heat-seal; when the top block pre-presses the bag opening, the elastic element deforms.

[0017] Preferably, the double-crank tracking shearing horizontal sealing device includes a crank swing arm lifting mechanism, which includes a lifting power component, a crank swing arm assembly, and a lifting frame. The lifting power component has a drive shaft at its drive end. Two crank swing arm assemblies are symmetrically arranged. Each crank swing arm assembly includes a swing connecting block and a reciprocating crank. The swing connecting block is fixedly mounted on the drive shaft and rotates synchronously with it. The first end of the reciprocating crank is rotatably connected to the swing connecting block, and the second end of the reciprocating crank is rotatably connected to the lifting frame. The double-crank horizontal sealing heat sealing mechanism is mounted on the lifting frame and rises and falls synchronously with it.

[0018] The vertical packaging machine provided by this utility model has at least the following beneficial effects: I. Improve unwinding stability: The unwinding and film feeding device monitors the film diameter in real time through the roll diameter detection mechanism. The unwinding mechanism dynamically adjusts the unwinding speed according to the diameter change to ensure that the bag film maintains stable tension during the unwinding process. This avoids stretching, wrinkling or loosening of the bag film due to the reduction in roll diameter, and provides a stable bag film foundation for subsequent forming and sealing.

[0019] II. Optimize the continuity and reliability of longitudinal sealing: The continuous longitudinal sealing device works in conjunction with the film stretching and forming device to continuously seal the formed tubular bag film longitudinally, forming a complete bag body that runs vertically through the entire structure. Compared with intermittent longitudinal sealing structures, continuous longitudinal sealing eliminates the pauses in the sealing action, ensuring uniform and continuous longitudinal seals, significantly improving sealing strength, and is especially suitable for high-speed packaging scenarios, reducing the risk of leaks and bag breakage.

[0020] III. Improve the accuracy and efficiency of horizontal sealing and shearing: The double-crank tracking shear horizontal sealing device precisely controls the movement trajectory of the horizontal sealing blade through a double-crank transmission structure, matching it in real time with the bag conveying speed (the "tracking shear" action) to ensure accurate horizontal sealing and a clean cut. The symmetry and rigidity of the double-crank structure effectively reduce transmission errors, ensuring synchronization between horizontal sealing and cutting even at high-speed packaging. This improves the appearance quality and sealing performance of the packaging bag, while also accommodating higher production speeds and increasing overall packaging efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the internal structure of the body of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the structure of the unwinding and film feeding device of this utility model from one perspective; Figure 4 This is a schematic diagram of the structure of the unwinding and film feeding device of this utility model from another perspective; Figure 5 This is a schematic diagram of the unwinding mechanism of this utility model; Figure 6 This is a schematic diagram of the tension feeding mechanism of this utility model; Figure 7 This is a schematic diagram of the membrane bonding mechanism of this utility model from one perspective; Figure 8 This is a schematic diagram of the membrane bonding mechanism of this utility model from another perspective; Figure 9 This is a utility model Figure 3 Enlarged view of part A; Figure 10 This is a utility model Figure 3 Enlarged view of part B; Figure 11 This is a utility model Figure 4 Enlarged view of part C; Figure 12 This is a utility model Figure 4 Enlarged view of part D; Figure 13 This is a utility model Figure 7 Enlarged view of part E; Figure 14 This is a utility model Figure 8 Enlarged view of part F; Figure 15 This is a schematic diagram of the structure of the film forming mechanism and the continuous longitudinal sealing mechanism of this utility model; Figure 16 This is a front view schematic diagram of the film forming mechanism and the continuous longitudinal sealing mechanism of this utility model; Figure 17 This is a schematic diagram of the continuous longitudinal sealing mechanism of this utility model; Figure 18 This is a schematic diagram of the structure of the double-crank tracking shear horizontal sealing device of this utility model; Figure 19 This is a schematic diagram of the structure of the double-crank horizontal sealing heat sealing mechanism, telescopic cutting mechanism and corner bag insertion mechanism of this utility model from one perspective; Figure 20 This is a structural schematic diagram from another perspective of the double-crank horizontal sealing heat sealing mechanism, telescopic cutting mechanism, and corner bag insertion mechanism of this utility model; Figure 21 This is a schematic diagram of the installation position of the telescopic cutting mechanism of this utility model; Figure 22 This is a schematic diagram of the telescopic cutting mechanism of this utility model; Figure 23 This is a schematic diagram of the crank-swing arm lifting mechanism and the discharge trough mechanism of this utility model from one perspective. Figure 24 This is a structural schematic diagram of the crank-swing arm lifting mechanism and the discharge chute mechanism of this utility model from another perspective.

[0023] Figure Labels 1. Unwinding and film feeding device; 11. Film feeding frame; 111. First mounting rod; 112. Second mounting rod; 113. Third mounting rod; 114. Sliding component; 12. Unwinding mechanism; 121. Unwinding power assembly; 122. Chuck; 123. Air shaft; 13. Roll diameter detection mechanism; 131. First mounting bracket; 132. Roll diameter sensor; 14. Tension feeding mechanism; 141. Tensioning power assembly; 142. Swinging tension roller assembly; 143. Angle sensor; 15. Film splicing mechanism; 151. Pneumatic telescopic assembly; 152. Film splicing platform; 153. Pressing rod; 154. First buffer ring; 155. Film splicing guide assembly; 1551. Film splicing... Guide component; 1552, Moving connector; 156, Pressing bracket; 157, Adhesive tape bonding plate; 158, Film pressing shaft; 159, Second buffer ring; 16, Correction mechanism; 161, Correction actuator; 162, Correction motor; 17, Color mark assembly; 171, Color mark sensor; 172, Second mounting bracket; 18, Bag length detection assembly; 181, Bag length detection encoder; 182, Third mounting bracket; 19, Horizontal guide rod; 2, Film stretching forming device; 21, Feeding mechanism; 211, Feeding hopper; 212, Feeding pipe; 22, Forming mechanism; 221, Collar forming device; 23, Vacuum film stretching mechanism; 231, Clamping telescopic assembly; 232, Vacuum film stretching mechanism; 3. Air-supported membrane assembly; 3. Continuous longitudinal sealing device; 31. Steel belt longitudinal sealing device; 4. Double-crank trailing shear transverse sealing device; 41. Double-crank transverse sealing heat sealing mechanism; 411. Heat sealing power assembly; 4111. Vertical double-output shaft steering motor; 4112. Output shaft; 412. Double-crank connecting rod assembly; 4121. Oscillating component; 4122. First crank connecting rod; 4123. Second crank connecting rod; 413. Heat sealing assembly; 4131. First heat sealing blade; 4132. Second heat sealing blade; 414. Horizontal guide assembly; 4141. Horizontal guide seat; 4142. Sliding shaft; 4143. Linkage beam; 4144. First heat sealing beam; 4145. Second heat sealing beam; 42. Telescopic cutting mechanism; 421. Telescopic cutting assembly; 422. Serrated cutter; 43. Corner bag insertion mechanism; 431. Corner bag insertion telescopic assembly; 432. Corner plate assembly; 44. Anti-pinch mechanism; 441. Top block; 442. Elastic element; 443. Mounting shaft; 45. Crank swing arm lifting mechanism; 451. Lifting power assembly; 4511. Lifting motor; 4512. Drive shaft; 452. Crank swing arm assembly; 4521. Swing connecting block; 4522. Reciprocating crank; 453. Lifting frame; 454. Vertical guide assembly; 4541. Vertical guide shaft; 4542. Sliding seat; 455. Buffer cylinder; 46. Discharge chute mechanism; 5. Machine body. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] This utility model provides a vertical packaging machine, see reference. Figures 1 to 24 As shown, the vertical packaging machine includes a film unwinding and feeding device 1, a film stretching and forming device 2, a continuous longitudinal sealing device 3, and a double-crank follow-up shearing and sealing device 4.

[0026] The unwinding and film feeding device 1 includes an unwinding mechanism 12 and a roll diameter detection mechanism 13. The film stretching and forming device 2 and the continuous longitudinal sealing device 3 are located downstream of the unwinding and film feeding device 1. The film stretching and forming device 2 includes a feeding mechanism 21 and a forming mechanism 22. The continuous longitudinal sealing device 3 corresponds to the forming mechanism 22. The double crank chasing shearing and sealing device 4 is located downstream of the film stretching and forming device 2 and the continuous longitudinal sealing device 3.

[0027] During operation, the unwinding mechanism 12 drives the film to unwind and transports the film to the film forming device 2. During this process, the roll diameter detection mechanism 13 detects the roll diameter in real time. The unwinding mechanism 12 can adjust the unwinding speed of the roll according to the roll diameter. When the film moves to the film forming device 2, the film bends into a cylindrical shape under the action of the forming mechanism 22. At this time, the continuous longitudinal sealing device 3 seals it longitudinally to form a bag body that runs through the vertical direction. Then, the double crank chasing and cutting transverse sealing device 4 chases and cuts the bag body to seal it transversely. At the same time, the material to be packaged enters the bag body through the feeding mechanism 21, and finally forms a finished closed packaging bag.

[0028] As an optional implementation, the vertical packaging machine includes a machine body 5, and a film unwinding and feeding device 1, a film stretching and forming device 2, a continuous longitudinal sealing device 3, and a double-crank chasing and shearing transverse sealing device 4 are all mounted on the machine body 5.

[0029] As an optional implementation, the unwinding and film feeding device 1 includes a film feeding frame 11 and a web-correcting mechanism 16.

[0030] A sliding member 114 is fixedly installed on the film feeding frame 11, and a horizontal guide rod 19 is installed on the machine body 5. The sliding member 114 is slidably sleeved on the horizontal guide rod 19. Specifically, the sliding member 114 is set as a sliding seat, and the horizontal guide rod 19 is set as a guide shaft, and the two are slidably engaged.

[0031] The correction mechanism 16 includes a correction motor 162 and a correction actuator 161 connected to the correction motor 162. The correction motor 162 is equipped with an encoder, and the actuating end of the correction actuator 161 is connected to the film feeding frame 11.

[0032] During operation, when the film roll deviates, the correction motor 162 drives the correction actuator 161 to extend and retract, thereby causing the film feeder 11 and the sliding member 114 to move along the horizontal guide rod 19, thus realizing the correction of the film roll.

[0033] As an optional implementation, the film feeding frame 11 is provided with a first mounting rod 111, and the roll diameter detection mechanism 13 includes a first mounting bracket 131 and a roll diameter sensor 132.

[0034] The first mounting rod 111 is positioned above the unwinding mechanism 12; the first mounting bracket 131 is fixedly mounted on the first mounting rod 111; the roll diameter sensor 132 is mounted on the first mounting bracket 131, with the detection end of the roll diameter sensor 132 facing the unwinding mechanism 12.

[0035] The first mounting bracket 131 can stably support the roll diameter sensor 132, enabling the roll diameter sensor 132 to accurately and stably detect the roll diameter in real time, ensuring the accuracy of the unwinding speed adjustment.

[0036] As an optional implementation, the unwinding mechanism 12 includes an unwinding power assembly 121, a chuck 122, and an air shaft 123. The output end of the unwinding power assembly 121 is connected to the chuck 122 and can drive the chuck 122 to rotate. The unwinding power assembly 121 can adjust the rotation speed of the chuck 122 according to the diameter of the film roll. The air shaft 123 is rotatably mounted on the film feeder 11 through bearings, and the connecting end of the air shaft 123 is connected to the chuck 122.

[0037] The air expansion shaft 123 facilitates the installation and disassembly of the film roll. By inflating, the film roll can be firmly fixed, preventing it from slipping or shifting during unwinding.

[0038] The unwinding power assembly 121 is an electric power assembly that provides rotational power for the chuck to rotate, thereby driving the air shaft and the film to rotate to achieve unwinding. It can also adjust the chuck rotation speed according to the film diameter detected by the film diameter detection mechanism, so that the unwinding speed is matched with the film diameter, ensuring the stability and reliability of the unwinding process.

[0039] As an optional implementation, the film feeding frame 11 is provided with a film receiving mechanism 15, which includes a pneumatic telescopic assembly 151, a film receiving platform 152, and a film pressing rod 153.

[0040] The film splicing platform 152 is fixedly mounted on the film feeding frame 11 and located downstream of the unwinding mechanism 12. The film splicing platform 152 provides a platform for the stable stacking of new and old films.

[0041] The pressure rod 153 is located above the film receiving platform 152. Multiple first buffer rings 154 are sequentially spaced along the axial direction on the pressure rod 153. The pressure rod 153 is used to press the film roll. The first buffer rings 154 are made of nitrile rubber rings, which have good elasticity and prevent damage to the film roll during the pressing process.

[0042] The pneumatic telescopic assembly 151 uses a cylinder and is fixedly mounted on the film feeding frame 11. The telescopic end of the pneumatic telescopic assembly 151 is connected to the film pressing rod 153 and can drive the film pressing rod 153 to move. The pneumatic telescopic assembly 151 provides power for the movement of the film pressing rod 153.

[0043] As an optional implementation, the film bonding mechanism 15 includes a film bonding guide assembly 155, which includes a film bonding guide 1551 and a movable connector 1552. The film bonding guide 1551 is fixedly mounted on the film feeding frame 11. The movable connector 1552 is slidably mounted on the film bonding guide 1551. The movable connector 1552 is connected to the pressure rod 153 and moves synchronously with the pressure rod 153.

[0044] Specifically, the membrane guide 1551 is configured as a fixing bolt, and the movable connector 1552 is configured as a linkage plate. The linkage plate is provided with an elongated hole, through which the fixing bolt passes and slides in cooperation with the elongated hole.

[0045] The membrane guide 1551 and the movable connector 1552 cooperate with each other to effectively limit the movement trajectory of the membrane pressing rod 153, making its movement process more stable and reliable.

[0046] As an optional implementation, the film splicing mechanism 15 includes a pressing bracket 156, an adhesive tape bonding plate 157, and a film pressing shaft 158. The film pressing shaft 158, the pressing bracket 156, and the adhesive tape bonding plate 157 are all located above the film splicing platform 152. The pressing bracket 156 is swayably mounted on the film feeding frame 11, and the movable connector 1552 abuts against the pressing bracket 156. The adhesive tape bonding plate 157 is mounted on the pressing bracket 156. The film pressing shaft 158 ​​is fixedly mounted on the pressing bracket 156 and located above the film splicing platform 152. A plurality of second buffer rings 159 are sequentially spaced along the axial direction on the film pressing shaft 158.

[0047] The clamping bracket 156 is swayable and can drive the tape bonding plate 157 and the film pressing shaft 158 ​​to move under the action of the movable connector 1552. The tape bonding plate 157 makes it easy to use tape to fix the new and old bag films. The second buffer ring 159 on the film pressing shaft 158 ​​can press the bag film after the film is attached to ensure that the bag film is firmly connected and avoid separation during subsequent transportation.

[0048] As an optional implementation, the unwinding and film feeding device 1 includes a tension winding mechanism 14.

[0049] The tension feeding mechanism 14 includes a tensioning power assembly 141, a swing tensioning roller assembly 142, and an angle sensor 143.

[0050] The tensioning power assembly 141 is configured as a telescopic assembly, preferably using a cylinder. It is connected to the swing tension roller assembly 142 and can drive the swing tension roller assembly 142 to swing. The swing tension roller assembly 142 includes two opposing swing arms and multiple tension rollers connected between the two swing arms. The bag film passes around the tension rollers in sequence.

[0051] An angle sensor 143 is mounted on the film feeder 11 and is used to detect the swing angle of the swing tension roller assembly 142.

[0052] During the film feeding process, the angle sensor 143 detects the swing angle of the swing tension roller assembly 142 in real time, and the tensioning power assembly 141 acts according to the angle information to ensure the stability of the film tension.

[0053] As an optional implementation, the unwinding and film feeding device 1 includes a color mark assembly 17, which includes a second mounting bracket 172 and a color mark sensor 171. A second mounting rod 112 is provided on the film feeding frame 11, and the second mounting bracket 172 is provided on the second mounting rod 112; the color mark sensor 171 is provided on the second mounting bracket 172.

[0054] The color mark sensor 171 tracks the pre-printed color mark in real time and provides feedback on the color mark position to assist in subsequent bag sealing and cutting.

[0055] As an optional implementation, the unwinding and film feeding device 1 includes a bag length detection component 18, which includes a third mounting bracket 182 and a bag length detection encoder 181. A third mounting rod 113 is provided on the film feeding frame 11, and the third mounting bracket 182 is provided on the third mounting rod 113; the bag length detection encoder 181 is provided on the third mounting bracket 182.

[0056] The bag length detection encoder 181 can record the number of pulses to detect the bag length, which facilitates subsequent fixed-length cutting.

[0057] As an optional implementation, the feeding mechanism 21 includes a feeding hopper 211 and a feeding pipe 212, and the forming mechanism 22 includes a collar forming device 221. The top feeding port of the feeding hopper 211 is located on the upper side of the table of the machine body 5, and the bottom discharge port of the feeding hopper 211 is connected to the feeding pipe 212. The feeding pipe 212 is located inside the machine body 5, and the bottom discharge port of the feeding pipe 212 is provided with an opening and bag-supporting structure. The collar forming device 221 is located on the feeding pipe 212 and below the feeding hopper 211.

[0058] The feed pipe 212 is used for feeding the material to be packaged, and in conjunction with the collar forming device 221, it is used to form the bag film into an axially continuous bag body. It also has the function of conveying the bag body.

[0059] The film stretching forming device 2 also includes a vacuum film stretching mechanism 23. The vacuum film stretching mechanism 23 includes a clamping telescopic component 231 and two vacuum film stretching components 232. The two vacuum film stretching components 232 are symmetrically arranged on both sides of the feed pipe 212. The clamping telescopic component 231 is a pneumatic telescopic component, which can drive the two vacuum film stretching components 232 to move towards each other, thereby clamping the bag body formed on the outside of the feed pipe 212. The vacuum film stretching component 232 is a belt-type film stretching component, which is provided with a vacuum adsorption groove. When stretching the film, the belt-type film stretching component generates negative pressure, thereby driving the bag body to move.

[0060] As an optional implementation, the continuous longitudinal sealing device 3 adopts the existing steel belt longitudinal sealing device 31, which has the advantages of high heat transfer efficiency, stable sealing quality and low maintenance cost.

[0061] As an optional implementation, the double-crank cross-seal device 4 includes a double-crank cross-seal heat sealing mechanism 41, which includes a heat sealing power assembly 411, a double-crank connecting rod assembly 412, and a heat sealing assembly 413.

[0062] The heat sealing power assembly 411 includes two output ends that are symmetrically arranged and rotate synchronously. Both output ends are connected to a double crank connecting rod assembly 412. Both double crank connecting rod assemblies 412 are connected to the heat sealing assembly 413 for transmission. The heat sealing assembly 413 includes two heat sealing blades arranged opposite to each other.

[0063] When sealing the bag horizontally, the heat sealing power assembly 411 can drive the two heat sealing knives to move towards or away from each other through the two double crank connecting rod assemblies 412, thereby achieving sealing.

[0064] As an optional implementation, the heat-sealing power assembly 411 includes a vertical dual-output shaft steering motor 4111. The vertical dual-output shaft steering motor 4111 is provided with two coaxially arranged and synchronously rotating output shafts 4112. The two output shafts 4112 are respectively connected to two double crank connecting rod assemblies 412.

[0065] The vertical dual-output shaft steering motor 4111 is adopted, which can provide two synchronous and stable output ends to ensure sealing quality. On the other hand, the vertical structure can optimize the spatial layout of the equipment.

[0066] As an optional implementation, the double crank connecting rod assembly 412 includes a oscillating member 4121, a first crank connecting rod 4122, and a second crank connecting rod 4123.

[0067] The swing member 4121 is configured as a swing rod, with its middle part fixedly mounted on the corresponding output shaft 4112. The swing member 4121 rotates synchronously with the corresponding output shaft 4112. The first end of the first crank connecting rod 4122 and the first end of the second crank connecting rod 4123 are respectively hinged to the two ends of the swing member 4121. The second end of the first crank connecting rod 4122 and the second end of the second crank connecting rod 4123 are respectively connected to the two heat sealing knives.

[0068] During the operation, the swing component 4121 rotates with the output shaft 4112, and the two crank connecting rods drive the two heat sealing knives to move. This not only effectively drives the heat sealing knives to perform heat sealing actions and ensures the sealing quality, but also evenly distributes the power, avoids overload on local components, and ensures the service life of the components.

[0069] As an optional implementation, the double-crank transverse heat sealing mechanism 41 further includes two symmetrically arranged horizontal guide components 414. The horizontal guide components 414 include a horizontal guide seat 4141 and a sliding shaft 4142. The two heat sealing knives are respectively configured as a first heat sealing knife 4131 and a second heat sealing knife 4132.

[0070] Two horizontal guide seats 4141 are symmetrically arranged on both sides of the vertical double-output shaft steering motor 4111. The end of the output shaft 4112 is rotatably mounted on the side wall of the corresponding horizontal guide seat 4141 via a bearing. The first end of the sliding shaft 4142 is connected to the linkage beam 4143, and the second end of the sliding shaft 4142 slides through the corresponding horizontal guide seat 4141 and is connected to the first heat-sealing beam 4144. The second end of the first crank connecting rod 4122 is hinged to the linkage beam 4143. The first heat-sealing knife 4131 is mounted on the first heat-sealing beam 4144. The second end of the second crank connecting rod 4123 is hinged to the second heat-sealing beam 4145. The second heat-sealing beam 4145 is slidably arranged between the two horizontal guide seats 4141, and the second heat-sealing knife 4132 is mounted on the second heat-sealing beam 4145.

[0071] The horizontal guide component 414 can effectively constrain the movement direction of the two heat sealing blades, ensuring the horizontal opening and closing effect of the two heat sealing blades, and at the same time improving the stability of the action process.

[0072] As an optional implementation, the double-cranked trailing shear sealing device 4 includes a telescopic cutting mechanism 42, which is disposed on the first heat sealing beam 4144 and moves synchronously with the first heat sealing beam 4144.

[0073] The telescopic cutting mechanism 42 includes a telescopic cutting assembly 421 and a serrated cutter 422. The telescopic cutting assembly 421 is a pneumatic telescopic assembly and is fixedly mounted on the first heat-sealing beam 4144. The telescopic end of the telescopic cutting assembly 421 is connected to the serrated cutter 422. A guide groove is provided horizontally on the first heat-sealing cutter 4131. The guide groove passes through the first heat-sealing beam 4144, and the serrated cutter 422 passes through the guide groove and slides in cooperation with the guide groove.

[0074] After the horizontal sealing action is completed, the telescopic component 421 is telescopically extended, which drives the serrated cutter 422 to move, thereby completing the cutting of the bag opening.

[0075] During the cutting process, the guide groove can effectively limit the movement trajectory of the serrated cutter 422, ensuring the cutting effect.

[0076] As an optional implementation, the double-cranked trailing shear sealing device 4 includes a corner bag mechanism 43, which includes two corner bag assemblies disposed opposite to each other on both sides of the heat sealing assembly 413.

[0077] The corner pocket assembly includes a corner pocket telescopic assembly 431 and a corner plate assembly 432. The corner pocket telescopic assembly 431 is a pneumatic telescopic assembly. The telescopic end of the corner pocket telescopic assembly 431 is connected to the corner plate assembly 432 and can drive the corner plate assembly 432 to move back and forth.

[0078] Specifically, the corner plate assembly 432 includes an upper corner plate and a lower corner plate, which extend and retract synchronously and are arranged vertically.

[0079] As an optional implementation, the double-cranked chasing shearing horizontal sealing device 4 includes an anti-clamping mechanism 44, which includes two anti-clamping components arranged opposite to each other, and the two anti-clamping components respectively correspond to the two heat sealing knives.

[0080] The anti-pinch assembly includes a movable top block 441 and an elastic element 442 connected to the top block 441. The top block 441 is connected to a mounting shaft 443. A mounting seat is provided on the heat-sealing beam. The mounting shaft 443 is slidably mounted on the mounting seat. The elastic element 442 is a spring, sleeved on the mounting shaft 443, and its two ends abut against the mounting seat and the heat-sealing beam, respectively.

[0081] During heat sealing, the first heat sealing beam 4144 and the second heat sealing beam 4145 move toward each other, and the two top blocks 441 move toward each other to pre-compress the seal. As the movement proceeds toward each other, the top blocks 441 press against the elastic element 442, causing it to deform, and the first heat sealing blade 4131 and the second heat sealing blade 4132 close to complete the heat sealing.

[0082] The anti-clamping mechanism 44 is set up to pre-compress the material before heat sealing, which can effectively prevent the material from falling to the sealing position prematurely due to different falling speeds during feeding, thus solving the risk of material clamping by the heat sealing knife during high-speed sealing.

[0083] As an optional implementation, the double-cranked chasing shear horizontal sealing device 4 includes a crank swing arm lifting mechanism 45, which includes a lifting power component 451, a crank swing arm component 452, and a lifting frame 453.

[0084] The lifting power assembly 451 includes a lifting motor 4511, and the driving end of the lifting motor 4511 is provided with a drive shaft 4512. The number of crank-swing arm assemblies 452 is set to two, and the two crank-swing arm assemblies 452 are symmetrically arranged. The crank-swing arm assembly 452 includes a swing connecting block 4521 and a reciprocating crank 4522. The swing connecting block 4521 is fixedly mounted on the drive shaft 4512 and rotates synchronously with the drive shaft 4512. The first end of the reciprocating crank 4522 is hinged to the swing connecting block 4521, and the second end of the reciprocating crank 4522 is hinged to the lifting frame 453.

[0085] The double-crank horizontal sealing heat sealing mechanism 41 is mounted on the lifting frame 453 and rises and falls synchronously with the lifting frame 453.

[0086] During operation, the lifting power assembly 451 drives the lifting frame 453 to rise and fall through the two crank swing arm assemblies 452. The double crank horizontal sealing heat sealing mechanism 41, the telescopic cutting mechanism 42, the corner bag insertion mechanism 43, and the anti-pinch mechanism 44 rise and fall synchronously. During this process, the double crank horizontal sealing heat sealing mechanism 41 performs the heat sealing action to heat seal the bag opening, the telescopic cutting mechanism 42 completes the cutting of the bag opening, and the corner bag insertion mechanism 43 completes the corner bag forming of the bag body.

[0087] The double-crank horizontal sealing heat sealing mechanism 41, the telescopic cutting mechanism 42, the corner bag insertion mechanism 43, the anti-pinch mechanism 44, and the crank swing arm lifting mechanism 45 work together to achieve follow-up cutting and sealing, which can effectively ensure work efficiency and packaging effect.

[0088] As an optional implementation, the crank arm lifting mechanism 45 includes two vertical guide components 454, which are symmetrically arranged on both sides of the two crank arm components 452. The vertical guide assembly 454 includes a vertical guide shaft 4541 and a sliding seat 4542. The vertical guide shaft 4541 passes through the sliding seat 4542 and slides in cooperation with the sliding seat 4542. The lifting frame 453 is connected to the sliding seat 4542 and lifts and lowers synchronously.

[0089] The vertical guide component 454 can effectively constrain the lifting trajectory and improve the tracking accuracy.

[0090] As an optional implementation, the crank arm lifting mechanism 45 further includes a buffer cylinder 455. The number of buffer cylinders 455 is set to two. The buffer cylinders 455 are arranged above the sliding seat 4542. The telescopic end of the buffer cylinder 455 is connected to the sliding seat 4542. The rod chamber of the buffer cylinder 455 is connected to an air outlet pipe. The air outlet of the air outlet pipe faces the vertical guide assembly 454.

[0091] The buffer cylinder 455 serves two purposes: firstly, it acts as a buffer, effectively reducing the impact and load on the mechanism during high-speed ascent; secondly, during descent, the gas in the rod chamber of the buffer cylinder 455 is compressed and blown towards the vertical guide assembly 454 through the exhaust pipe, thus achieving the functions of cooling and dust removal.

[0092] As an optional implementation, the double-crank horizontal sealing device 4 also includes a discharge chute mechanism 46, which includes a discharge chute. The discharge chute is located directly below the double-crank horizontal sealing heat sealing mechanism 41, and the machine body 5 is provided with a discharge port corresponding to the position of the discharge chute.

[0093] During operation, the finished bags, after being horizontally sealed, are discharged from the machine body 5 sequentially through the discharge chute and discharge port.

[0094] In the description of this application, it should be understood that the terms "upper", "lower", "inner", "outer", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0095] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" or "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0096] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0097] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A vertical packaging machine, characterized in that, It includes an unwinding and film feeding device, a film stretching and forming device, a continuous longitudinal sealing device, and a double-crank chasing and shearing transverse sealing device, wherein: The unwinding and film feeding device includes an unwinding mechanism and a roll diameter detection mechanism. The unwinding mechanism can transport the bag film to the film stretching and forming device. The roll diameter detection mechanism detects the roll diameter in real time. The unwinding mechanism can adjust the unwinding speed of the roll according to the roll diameter. The film stretching and forming device and the continuous longitudinal sealing device are located downstream of the unwinding and feeding film device. The film stretching and forming device includes a feeding mechanism for filling the material to be packaged and a forming mechanism for forming the bag film. The continuous longitudinal sealing device corresponds to the forming mechanism. The continuous longitudinal sealing device longitudinally seals the formed bag film to form a bag that runs through the vertical direction. The double-crank follow-cut horizontal sealing device is located downstream of the film forming device and the continuous longitudinal sealing device. The double-crank follow-cut horizontal sealing device can perform horizontal sealing and follow-cutting on the bag body to form a closed packaging bag.

2. The vertical packaging machine according to claim 1, characterized in that, The vertical packaging machine includes a machine body, and the unwinding and film feeding device, the film stretching and forming device, the continuous longitudinal sealing device, and the double crank chasing and shearing transverse sealing device are all mounted on the machine body.

3. The vertical packaging machine according to claim 2, characterized in that, The vertical packaging machine includes a film feeding frame and a deviation correction mechanism, wherein: A sliding component is fixedly installed on the film feeding frame, and a guide component is installed on the machine body. The sliding component is slidably sleeved on the guide component. The correction mechanism includes a correction motor and a correction actuator connected to the correction motor. The correction motor is equipped with an encoder, and the actuating end of the correction actuator is connected to the film feeding frame.

4. The vertical packaging machine according to claim 3, characterized in that, The film feeding frame is equipped with a film-attaching mechanism, which includes a pneumatic telescopic assembly, a film-attaching platform, a pressure rod, a film-attaching guide assembly, a pressure bracket, an adhesive tape bonding plate, and a pressure shaft, wherein: The film splicing platform is mounted on the film feeding frame and is located downstream of the unwinding mechanism; The pressure rod is located above the film receiving platform, and a plurality of first buffer rings are sequentially spaced along the axial direction on the pressure rod; The pneumatic telescopic assembly is fixedly mounted on the film feeding frame. The telescopic end of the pneumatic telescopic assembly is connected to the film pressing rod and can drive the film pressing rod to move. The guiding assembly includes a guide member and a movable connector. The guide member is fixedly mounted on the film feeding frame. The movable connector is slidably mounted on the guide member and is connected to the film pressing rod. The pressing shaft, the pressing bracket, and the tape bonding plate are all located above the film receiving platform; the pressing bracket is swayably mounted on the film feeding frame, and the movable connecting piece abuts against the pressing bracket; The tape bonding plate is mounted on the clamping bracket; The pressure shaft is fixedly mounted on the clamping bracket and located above the film receiving platform. Multiple second buffer rings are arranged sequentially at intervals along the axial direction on the pressure shaft.

5. The vertical packaging machine according to claim 1, characterized in that, The double-crank shearing horizontal sealing device includes a double-crank horizontal sealing heat sealing mechanism, which comprises a heat sealing power assembly, a double-crank connecting rod assembly, and a heat sealing assembly, wherein: The heat sealing power assembly includes two output ends that are symmetrically arranged and rotate synchronously. Both output ends are connected to a double crank connecting rod assembly. Both double crank connecting rod assemblies are connected to the heat sealing assembly in a transmission manner. The heat sealing assembly includes two heat sealing blades arranged opposite to each other. The heat-sealing power assembly can drive the two heat-sealing blades to move towards or away from each other through the two double-crank connecting rod assemblies.

6. The vertical packaging machine according to claim 5, characterized in that, The heat-sealing power assembly includes a vertical dual-output shaft steering motor, which has two coaxially arranged and synchronously rotating output shafts, and the two output shafts are respectively connected to the two dual-crank connecting rod assemblies. The double crank connecting rod assembly includes a swing member, a first crank connecting rod, and a second crank connecting rod. The middle position of the swing member is fixedly mounted on the corresponding output shaft, and the swing member rotates synchronously with the corresponding output shaft. The first end of the first crank connecting rod and the first end of the second crank connecting rod are rotatably connected to the two ends of the swing member, and the second end of the first crank connecting rod and the second end of the second crank connecting rod are respectively connected to the two heat sealing knives. The double-crank horizontal sealing heat sealing mechanism further includes two symmetrically arranged horizontal guide components. Each horizontal guide component includes a horizontal guide seat and a sliding shaft. The two heat sealing knives are respectively configured as a first heat sealing knife and a second heat sealing knife. The two horizontal guide seats are symmetrically arranged on both sides of the vertical double-output shaft steering motor. The end of the output shaft is rotatably mounted on the outer wall of the corresponding horizontal guide seat. The first end of the sliding shaft is connected to the linkage beam, and the second end of the sliding shaft slides through the horizontal guide seat and is connected to the first heat sealing beam. The second end of the first crank connecting rod is rotatably connected to the linkage beam. The first heat sealing knife is mounted on the first heat sealing beam, and the second end of the second crank connecting rod is rotatably connected to the second heat sealing beam. The second heat sealing beam is slidably mounted between the two horizontal guide seats, and the second heat sealing knife is mounted on the second heat sealing beam.

7. The vertical packaging machine according to claim 6, characterized in that, The double-crank tracking shearing horizontal sealing device includes a telescopic cutting mechanism, which is mounted on the first heat sealing beam and moves synchronously with the first heat sealing beam; The telescopic cutting mechanism includes a telescopic cutting component and a serrated cutter. The telescopic cutting component is fixedly mounted on the first heat-sealing beam. The telescopic end of the telescopic cutting component is connected to the serrated cutter. A guide groove is provided through the first heat-sealing cutter in the horizontal direction. The serrated cutter passes through the guide groove and slides with the guide groove.

8. The vertical packaging machine according to claim 5, characterized in that, The double-crank tracking shearing horizontal sealing device includes a corner bag insertion mechanism, which includes two corner bag insertion assemblies arranged opposite to each other on both sides of the heat sealing assembly. The corner pocket assembly includes a corner pocket telescopic assembly and a corner plate assembly. The corner pocket telescopic assembly is connected to the corner plate assembly and can drive the corner plate assembly to move back and forth.

9. The vertical packaging machine according to claim 5, characterized in that, The double-crank tracking shearing horizontal sealing device includes an anti-pinch mechanism, which includes two anti-pinch components arranged opposite to each other, and the two anti-pinch components respectively correspond to the two heat sealing knives; The anti-pinch assembly includes a movable top block and an elastic element connected to the top block. The top block is used to pre-press the bag opening when the two heat-sealing knives heat-seal. When the top block pre-presses the bag opening, the elastic element deforms.

10. The vertical packaging machine according to claim 5, characterized in that, The dual-crank tracking shear horizontal sealing device includes a crank-swing arm lifting mechanism, which comprises a lifting power component, a crank-swing arm assembly, and a lifting frame, wherein: The driving end of the lifting power component is provided with a drive shaft; The number of crank-swing arm assemblies is set to two, and the two crank-swing arm assemblies are symmetrically arranged. Each crank-swing arm assembly includes a swing connecting block and a reciprocating crank. The swing connecting block is fixedly mounted on the drive shaft and rotates synchronously with the drive shaft. The first end of the reciprocating crank is rotatably connected to the swing connecting block, and the second end of the reciprocating crank is rotatably connected to the lifting frame. The double-crank horizontal sealing heat sealing mechanism is mounted on the lifting frame and moves up and down synchronously with the lifting frame.

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