Heat sealing film wrapping machine

Abstract

The invention discloses a heat-sealing film covering machine, which adopts an oversleeve packaging film (a pre-sealing barrel film with openings at two ends) as a basic material, continuously supplies materials through an unwinding assembly, and synchronously finishes fixed-length cutting and one-end pre-sealing on line through a cutting and sealing assembly, so that beat production close to continuous flow is realized; the follow-up bag opening assembly is matched with the material pushing assembly, accurate film sleeving and positioning are achieved, the bag opening assembly can stably and repeatedly open the open end of the oversleeve packaging film accurately to form channels with the same size, the material pushing assembly is matched with the conveying assembly, it is ensured that a folded finished product is stably and centrally pushed into the oversleeve packaging film along a straight line, and the packaging efficiency is improved. By means of the active pushing mode, the products are prevented from moving or inclining in the packaging film; and subsequently, through 90-degree rotating operation of the jacking rotating assembly, it is ensured that the opening end, finally needing heat sealing, of the packaging film is located at the optimal position, thorough gas exhaust and uniform heat sealing of the vacuumizing heat sealing assembly are facilitated, and the vacuum degree and the reliability of the sealing performance of a seal are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of automated packaging equipment technology, specifically to a heat-sealing sleeve machine. Background Technology

[0002] In high-value-added industries such as precision electronics and medical devices, the packaging process for products such as precision electronic components, medical devices, and semiconductors includes processes such as tray loading, die-cutting and lamination, appearance inspection, finished product palletizing, heat sealing, box opening, box sealing, and labeling.

[0003] Heat sealing is a crucial post-packaging process, where packaging film is used to wrap and heat-seal the product to form a sealed package. In existing technology, a single-sheet packaging film is used to seal stacked finished products using a sealing machine. A rotating roller continuously releases the rolled-up sheet of packaging film, which is then folded inwards by a folding assembly. The stacked product is placed between the folded sheets of film, and a cutting assembly cuts the film to the required length. The cut film is then conveyed to a heat-sealing assembly where both sides are heat-sealed, leaving only one side open. Finally, vacuuming and end sealing are performed to create a sealed package.

[0004] Existing heat-sealing and wrapping equipment for folded packaging films is prone to deviations or wrinkles during the folding process, resulting in asymmetry on both sides of the packaging film. Furthermore, the wrapping operation involves using upper and lower suction cups to hold the top and bottom sheets of the folded film, and then a robotic arm to place the folded product between the top and bottom sheets. This process cannot guarantee the accuracy of the product's placement or ensure its centered position within the film, affecting the quality and appearance of the sealed packaging. In addition, the entire process involves multiple sequential steps, including unwinding, folding, product placement, cutting, transfer, heat sealing (multi-sided), vacuuming, and end sealing. Each step requires high precision, and the cycle time must be strictly matched; even minor errors in any step can affect the final wrapping quality. Summary of the Invention

[0005] To address the problems existing in the background technology, the present invention provides a heat-sealing sleeve film machine, which uses sleeve packaging film. During the feeding process, the film is simultaneously pulled to a fixed length, heat-sealed at the end, and cut to form a packaging film with one open end. Then, the open end of the sleeve packaging film is opened by the bag-supporting assembly, and the stacked finished product is pushed smoothly and accurately into the packaging film and centered by the pushing assembly, simplifying the processing steps and forming a continuous and efficient production cycle.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides a heat-sealing sleeve machine, comprising a support frame, a first conveying assembly, a second conveying assembly, an unwinding assembly, a cutting and sealing assembly, a material clamping and traction assembly, a bag supporting assembly, a material pushing assembly, a lifting and rotating assembly, and a vacuum heat-sealing assembly; The support is equipped with a first conveying component and a second conveying component, a lifting and rotating component and a vacuum heat sealing component, all with the same conveying direction. The first conveying component transports the stacked finished product to the loading end of the second conveying component. The unwinding assembly and the cutting and sealing assembly are located above the second conveying assembly. The unwinding assembly is used to continuously unwind the sleeve packaging film along the length direction. The sleeve packaging film has a structure with open ends, sealed sides, and hollow interior along the length direction. The unwound sleeve packaging film enters the cutting and sealing assembly for simultaneous fixed-length cutting and end sealing operations. The clamping and traction assembly is installed on the side of the second conveying assembly. It pulls the sleeve packaging film, which has been sealed and cut at the end and has one open end, to the feeding end of the second conveying assembly, with the open end of the sleeve packaging film facing the first conveying assembly. The bag-supporting assembly is located at the feeding end of the second conveying assembly. It opens the opening end of the sleeve packaging film conveyed by the clamping and traction assembly. The pushing assembly pushes the stacked finished product conveyed to the feeding end of the second conveying assembly from the opening end of the sleeve packaging film into its interior for film covering operation. After being wrapped in film, the stacked packaged product is conveyed by the second conveying component to the lifting and rotating component. The lifting and rotating component rotates the wrapped packaged product by 90 degrees and conveys it to the vacuum heat sealing component to vacuum the inside of the sleeve packaging film and heat seal the open end of the sleeve packaging film.

[0007] The above technical solution is adopted: Using sleeve packaging film (pre-sealed tubular film with open ends) as the base material, the unwinding assembly continuously supplies material, and the cutting and sealing assembly simultaneously completes fixed-length cutting and one-end pre-sealing online, achieving near-continuous flow production. The subsequent bag-supporting assembly and pushing assembly work together to achieve precise film fitting and positioning. The bag-supporting assembly stably and repeatedly and precisely opens the open end of the sleeve packaging film, forming a channel of consistent size. The pushing assembly and conveying assembly work together to ensure that the stacked packaged product is smoothly and centrally pushed into the sleeve packaging film along a straight line. This active pushing method prevents the product from shifting or tilting within the packaging film. The subsequent 90-degree rotation of the lifting and rotating assembly ensures that the opening end of the packaging film to be heat-sealed is in the optimal position, facilitating thorough gas removal and uniform heat sealing by the vacuum heat-sealing assembly, greatly improving the reliability of the vacuum level and sealing performance.

[0008] Furthermore, the bag-supporting assembly includes a lower pressing film assembly and an upper clamping material assembly. The lower pressing film assembly is installed at the feeding end of the second conveying assembly to suck up and press down the lower piece of the single packaging film at the open end. The upper clamping material assembly is installed above the feeding end of the second conveying assembly to suck up and pull up the upper piece of the single packaging film at the open end. The upper clamping material assembly and the lower pressing film assembly cooperate to open the open end of the sleeve packaging film located at the feeding end of the second conveying assembly.

[0009] The first conveyor component sequentially transports the stacked packaged products to the loading end of the second conveyor component for loading. The clamping and traction component pulls the pre-cut and sealed single-piece sleeve packaging film to the loading end of the second conveyor component. The upper clamping component and the lower pressing component work together to open the opening of the single-piece packaging film at the loading end of the second conveyor component, forming a sufficiently large opening space for the stacked packaged products to enter. The pushing component then pushes the stacked packaged products from the opening of the single-piece packaging film into its interior. The entire operation is compact and smooth, accurately and smoothly pushing the stacked packaged products to the center position inside the packaging film, ensuring the quality of the sealed packaging.

[0010] The lower pressing assembly includes a horizontal support plate located at the feeding end of the second conveying assembly. A suction cup assembly for picking up the lower sheet of a single packaging film from its open end is mounted on the horizontal support plate. Two vertically fixed plates arranged side-by-side are mounted at the bottom of the horizontal support plate. A first lead screw is installed between the vertical fixed plates. Two sliding blocks are mounted on the first lead screw. Telescopic cylinders are mounted on the top of each sliding block. A horizontal pressing component is mounted on the driving end of each telescopic cylinder. The telescopic cylinder drives the pressing component to extend and press down and fix the lower sheet of the single packaging film from its open end on the horizontal support plate.

[0011] After the clamping and traction assembly pulls the single sleeve packaging film to the loading end of the second conveying assembly, the lower suction cup assembly is activated. The lower piece of the single packaging film at the open end is adsorbed onto the horizontal support plate. Simultaneously, the upper clamping assembly also starts working, adsorbing and moving the upper piece of the single sleeve packaging film at the open end upward. Then, the telescopic cylinder controls two pressing parts to extend towards the sleeve packaging film. The height of the pressing parts is slightly higher than the height of the horizontal support plate. The pressing parts cooperate with the horizontal support plate to press down and fix the lower piece of the single sleeve packaging film at the open end. When the stacked finished product is pushed inward from the open end of the single sleeve packaging film, the stacked finished product contacts the pressing parts, not directly contacts the lower piece of the single sleeve packaging film at the open end. This avoids the lower piece of the single sleeve packaging film at the open end from curling inward due to inward friction when pushing the stacked finished product inward, which would affect the film wrapping operation of the stacked finished product.

[0012] Preferably, the distance between the two sliding blocks is adjustable, and the top of the two pressing members is provided with side baffles on opposite sides for contacting and opening the lower sides of the opening end of the single packaging film. The two pressing members are provided with a guide plate on the side facing the first conveying assembly. The guide plate is an L-shaped outward expansion structure that matches the shape of the end of the pressing member.

[0013] Before use, adjust the distance between the two sliding blocks according to the size of the opening end of the sleeve packaging film to ensure the effective opening of the lower part of the opening end of the single sleeve packaging film by the pressing component. In addition, the side baffle and the pressing component cooperate to form an L-shaped opening structure. On the one hand, this provides better opening of the lower part of the opening end of the single sleeve packaging film; on the other hand, it also forms a protective structure when in contact with the lower part of the opening end of the sleeve packaging film, preventing the sharp edges of the side baffle from directly contacting the opening end of the sleeve packaging film and easily causing tearing. By setting an L-shaped outward-expanding guide plate on the outside of the pressing component, it is easy to push the stacked packaged product smoothly and orientably into the inside of the sleeve packaging film.

[0014] The upper clamping assembly includes a fixed frame, an upper suction cup assembly, and an upper bag clamping assembly. The fixed frame is mounted on the bracket, and the fixed frame is equipped with a vertically retractable upper suction cup assembly and an upper bag clamping assembly. The upper suction cup assembly sucks the upper piece of the single packaging film at the open end upwards, and the upper bag clamping assembly clamps both sides of the upper piece of the single packaging film at the open end to support the bag.

[0015] During operation, the clamping and traction assembly pulls the single sleeve packaging film to the feeding end of the second conveying assembly. Then, the lower suction cup assembly and the upper suction cup assembly work synchronously to separate the opening end of the sleeve packaging film. The upper suction cup assembly picks up the upper piece of the opening end of the sleeve packaging film and moves it close to the upper bag clamping assembly. The upper bag clamping assembly then clamps both sides of the upper piece of the opening end of the single sleeve packaging film to support the bag, forming a stable open structure at the opening end of the sleeve packaging film.

[0016] Specifically, the upper bag clamping assembly includes a horizontal sliding component, a first fixed plate, a second fixed plate, a connecting arm, a tray, and a pressure plate. The horizontal sliding component is mounted on the fixed frame. The first fixed plate is mounted on the driving end of the horizontal sliding component. A vertical sliding driving component is mounted on the first fixed plate. The second fixed plate is mounted on the driving end of the vertical sliding driving component. Two vertically arranged connecting arms with an adjustable distance between them are mounted on the second fixed plate. A tray and a pressure plate arranged side by side are mounted on the inner side of the bottom end of the connecting arm. The pressure plate is located directly above the tray and can move up and down. It cooperates with the tray to clamp the upper piece of the single packaging film at the opening end.

[0017] Through the above structural design, the spacing between the connecting arms is adjustable. The connecting arms can move laterally along the conveying direction of the second conveying component and can also move up and down vertically. During operation, after the upper suction cup component picks up the upper piece of the sleeve packaging film opening and lifts it upwards, the connecting arms are controlled to move until the upper piece of the sleeve packaging film opening is located between the tray and the pressure plate. The pressure plate is then controlled to move downwards and contact the tray for clamping. The upper suction cup component stops its suction operation and drives the connecting arms to move upwards to a specific position, thus realizing the upward pulling and opening operation of the upper two sides of the sleeve packaging film opening.

[0018] Furthermore, the clamping and traction assembly includes a linear drive assembly, a third fixed plate, a rotary cylinder, and a gripper cylinder. The second conveying assembly is equipped with linear drive assemblies on both sides along the conveying direction. The drive ends of the linear drive assemblies are respectively equipped with third fixed plates. The third fixed plates are equipped with rotary cylinders. The drive ends of the rotary cylinders are equipped with gripper cylinders. The two gripper cylinders respectively clamp the two sides of the single-piece packaging film feeding end and pull it to the feeding end of the second conveying assembly.

[0019] The above structural design enables the clamping and feeding of the sleeve packaging film, while not affecting the second conveying component's conveying of the stacked products after the sleeve film is applied.

[0020] Furthermore, the cutting and sealing assembly includes a fourth fixing plate, a downward traction assembly, a cutting blade assembly, a heat sealing assembly, and a pressing and pulling assembly. The downward traction assembly, the cutting blade assembly, and the pressing and pulling assembly are sequentially installed on the inner side of the fourth fixing plate from top to bottom. The heat sealing assembly is installed on the inner side of the fourth fixing plate. The heat sealing end of the heat sealing assembly is directly opposite the lower pressure plate of the cutting blade assembly. The cutting blade of the cutting blade assembly is located directly above the lower pressure plate. The cutting blade can move relative to the lower pressure plate and is in a retracted state and an extended state. The distance between the heat sealing assembly and the cutting blade assembly is adjustable. The downward traction component continuously pulls and conveys the unwound sleeve packaging film downwards. The sleeve packaging film passes downwards through the gap formed between the heat sealing component and the cutting component and enters the pressing and pulling component. The pressing and pulling component clamps the end of the sleeve packaging film and pulls it downwards to a specific position. There are three states between the heat sealing assembly and the cutting assembly: State mode 1: A gap is formed between the heat sealing assembly and the cutting assembly for the sleeve packaging film to pass downward; State mode 2: The heat sealing end of the heat sealing assembly contacts the lower pressure plate in the cutting assembly to perform a heat sealing operation on the sleeve packaging film, and the cutting blade is in a retracted state; State mode 3: The cutting blade is controlled to be in an extended state, and cuts at a position above the heat sealing point of the sleeve packaging film.

[0021] In this invention, a sleeve packaging film is directly used, which only requires heat sealing and cutting at one end, leaving an opening on one side for product insertion. The sleeve packaging film is continuously unwound by the unwinding assembly. Initially, the film is manually fed, pulling one end of the sleeve packaging film to the downward traction assembly. During the unwinding process, the heat sealing assembly and the cutting assembly are in state mode one: the cutter is in the retracted state, and the heat-sealing end of the heat sealing assembly separates from the lower pressure plate in the cutting assembly, forming a gap. The sleeve packaging film enters downward to the pressing and pulling assembly, which clamps the end of the sleeve packaging film and pulls it downward to a specific position (through the lower...). (The length of the packaging film can be controlled by pulling the length). At this time, the heat sealing assembly and the cutting assembly are in state mode two: the right push plate is pushed out, and the lower pressure plate in the cutting assembly contacts the heat sealing end of the heat sealing assembly to perform a heat sealing operation on the sleeve packaging film. After the heat sealing is completed, the heat sealing assembly and the cutting assembly are in state mode three: the right cutter is pushed out and cuts at the position above the heat sealing point of the sleeve packaging film. The above operation is repeated to realize continuous heat sealing and cutting of the packaging film. Moreover, the material pulling, cutting and heat sealing processes are almost synchronized, simplifying the material feeding process and forming a continuous and efficient production cycle.

[0022] The cutting assembly includes a push plate, a cutting blade, a pressure plate, a first mounting plate, and a second mounting plate. The first mounting plate and the second mounting plate are fixedly mounted on the inner side of the fourth fixing plate. A first telescopic drive assembly is mounted on the first mounting plate, and a second telescopic drive assembly is mounted on the second mounting plate. The drive end of the first telescopic drive assembly is provided with a push plate. A transverse pressure plate is mounted on the side of the push plate facing the heat sealing assembly. The cutting blade is located directly above the pressure plate and is connected to the drive end of the second telescopic drive assembly.

[0023] The cutter and pusher are driven by different drive mechanisms, enabling separate control of the cutter and the lower pressure plate on the pusher. Specifically, the first telescopic drive assembly consists of multiple first telescopic cylinders arranged side by side. These cylinders are mounted on a first mounting plate, with their drive ends passing through the mounting plate and connected to the side of the pusher away from the heat-sealing assembly. During operation, the first telescopic cylinders synchronously drive the pusher on the right side to extend or retract, achieving separation or contact between the lower pressure plate and the heat-sealing end of the heat-sealing assembly. The second telescopic drive assembly includes an adjusting plate, a second telescopic cylinder, and guide posts. The adjusting plate is located outside the second mounting plate, and the two are arranged side by side. The second telescopic cylinder is mounted on the side of the second mounting plate away from the heat-sealing assembly, with its drive end connected to the adjusting plate. Guide posts are located at both ends of the adjusting plate, with one end passing through both the second and first mounting plates and connected to both sides of the cutter end. During operation, the combination of the second telescopic cylinder, adjusting plate, and guide posts allows the cutter to extend smoothly for cutting or retract without affecting the passage of the packaging film.

[0024] Preferably, a first upper pressure plate is also installed on the side of the pusher plate facing the heat sealing assembly. The first upper pressure plate is located above the cutter. A second upper pressure plate is provided above the heat sealing end of the heat sealing assembly. Under the action of the first telescopic drive assembly, the first upper pressure plate extends and docks with the second upper pressure plate or the first upper pressure plate retracts and separates from the second upper pressure plate to form a gap for the sleeve packaging film to pass through downward.

[0025] During the movement of the push plate driven by the first telescopic drive assembly, the first upper pressure plate and the lower pressure plate can move synchronously. When the packaging film needs to be cut and heat-sealed, the push plate located on the right side is first pushed out by the first telescopic drive assembly. The first upper pressure plate and the lower pressure plate move synchronously toward the heat-sealing assembly. The first upper pressure plate contacts and presses the packaging film with the second upper pressure plate. At the same time, the end of the lower pressure plate contacts and presses the heat-sealing end of the heat-sealing assembly to perform a heat-sealing operation on the packaging film. Subsequently, when the cutter located on the right side is pushed out by the second telescopic drive assembly to cut the packaging film, the cutting is ensured to proceed smoothly and the cut is flatter. The problem of uneven cut caused by the cutting force of the cutter pulling the packaging film downward will not occur.

[0026] Preferably, a position sensor is installed on the push plate. Through the cooperation of the position sensor and the controller, the moving distance of the upper and lower pressure plates and the first upper pressure plate on the push plate can be precisely controlled, ensuring the heat-sealing effect of the heat-sealing end of the heat-sealing assembly with the lower pressure plate on the packaging film, as well as the pressing effect of the first and second upper pressure plates on the packaging film.

[0027] The pressing and pulling assembly includes a support plate, a U-shaped mounting plate, a linear lifting drive assembly, two clamping plates, and a third telescopic drive assembly. The support plate is installed on the inner side of the fourth fixed plate. The linear lifting drive assembly is mounted on the support plate. The output end of the linear lifting drive assembly is mounted on the U-shaped mounting plate. The clamping plates are arranged side by side between the two side arms of the U-shaped mounting plate. The third telescopic drive assembly is installed inside the groove of the U-shaped mounting plate. The third telescopic drive assembly is driven to the outer side of one of the clamping plates. Under the action of the third telescopic drive assembly, the two clamping plates separate to form a clamping position for the end of the sleeve packaging film to enter, or the two clamping plates are connected to press and close the end of the sleeve packaging film for subsequent pulling-down operations.

[0028] The pressing and pressing assembly has dual functions of pulling down and clamping. In the initial position, the linear lifting drive assembly is in the retracted state, and the two clamps are located close to the heat sealing assembly to avoid the sleeve packaging film from shifting position due to long-distance material feeding. When the sleeve packaging film is pulled down into the feeding position formed between the two clamps of the pressing and pulling assembly, under the action of the third telescopic drive assembly, the two clamps are joined together to press down the end of the sleeve packaging film. Then, the linear lifting drive assembly drives the two clamps to pull down the end of the sleeve packaging film to a specific length. The length of the packaging film bag can be controlled by the pull-down length of the linear lifting drive assembly. Subsequently, the packaging film is heat-sealed and cut to complete the processing of a sleeve packaging film bag.

[0029] Preferably, two inclined guide plates are installed on the top of the two side arms of the U-shaped mounting plate, and the two guide plates are respectively located directly above the two clamping plates.

[0030] Because the packaging film is lightweight, its ends may slightly deviate when being fed downwards. The guide plate guides the ends of the sleeve packaging film to the two clamping plates for clamping. The fixed-length cutting function of the cutting and sealing assembly allows it to quickly adapt to packaging needs of different lengths (corresponding to product heights), offering convenient adjustments and short changeover times.

[0031] The entire equipment is highly compatible with various finished product formats such as boxed, bagged, and regularly stacked block packaging, making it versatile.

[0032] The downward traction assembly includes a traction roller shaft and an eccentric rubber roller mounted side by side on the side of the fourth fixed plate. The unwound sleeve packaging film is pulled downward through the clamping gap formed between the traction roller shaft and the eccentric rubber roller.

[0033] The traction roller shaft is driven by a motor, providing downward traction force. The eccentric rubber roller, as the driven component, is movable. Under pressure, the rubber surface of the eccentric rubber roller contacts the surface of the traction roller shaft, forming a narrow clamping area (or bite-in), achieving stable and continuous downward traction. By rotating the eccentric shaft in the eccentric rubber roller through the handle, the position of the rubber roller relative to the fixed traction roller will change slightly. The operator can precisely control the force of the rubber roller pressing against the traction roller shaft to dynamically adjust the core performance of the entire downward traction assembly—the clamping force on the membrane material.

[0034] In order to better utilize the gravity of the packaging film to achieve the feeding of the packaging film, the working points of the downward traction component, the cutting component, the heat sealing component and the pressing pull-down component are all located on the same vertical line.

[0035] The unwinding assembly includes an unwinding roller shaft and multiple guide shafts mounted on the side of the fourth fixed plate. The outer side of the unwinding roller shaft is used to place the sleeve packaging film roll. The unwound sleeve packaging film is guided to the downward traction assembly by the multiple guide shafts.

[0036] The unwinding roller adopts an air-expanding shaft, which facilitates the feeding of roll material. The unwinding roller is driven by a motor and continuously releases the sleeve packaging film. The guide shaft then guides the film to the cutting and sealing assembly for subsequent length-fixing, heat-sealing, and cutting operations.

[0037] Furthermore, the pushing component is integrated into the first conveying component. Under normal conditions, the pushing component is located below the first conveying component. When the stacked finished product is conveyed to the end of the first conveying component, the pushing component extends upward through the gap of the first conveying component and pushes the stacked finished product toward the second conveying component.

[0038] The first conveying component has a stacking and packaging component at its loading end for stacking finished products from bottom to top. A pushing component is installed on the first conveying component near the unloading end. The conveying roller component on the first conveying component near the unloading end includes two oppositely arranged conveying roller shafts. A gap is reserved between the opposite ends of the two conveying roller shafts to facilitate the pushing end of the pushing component to smoothly pass through the gap between the front and rear of the conveying roller components and the gap between the ends of the conveying roller shafts when the pushing component is needed later. This structure is ingeniously designed, integrating the pushing component into a single unit. The structure is compact and synchronously automates the stacking and packaging of finished products, as well as the precise and directional delivery to a specific location for subsequent film wrapping operations.

[0039] The feeding assembly includes a linear sliding drive, a linear slide, a lifting cylinder, a mounting component, and a push plate. The linear slide is installed between the bracket and the second conveying assembly, and the length direction of the linear slide is consistent with the conveying direction of the second conveying assembly. The lifting cylinder is slidably installed on the linear slide and is driven to move along the length direction of the linear slide under the action of the linear sliding drive. The driving direction of the lifting cylinder is vertically upward, and a horizontally arranged mounting component is installed at the driving end of the lifting cylinder. A push plate is installed at the end of the mounting component.

[0040] In normal operation, the lifting cylinder lowers the mounting component and the push plate, which are hidden below the second conveying assembly. When the stacked packaged finished product is conveyed to the middle of the second conveying assembly or close to the unloading end, the lifting cylinder is controlled to raise the mounting component and the push plate. The mounting component and the push plate pass through the gap between the ends of the second conveying roller shaft and the gap between the front and rear of the conveying roller assembly, respectively. Then, through the cooperation of the linear sliding drive and the linear slide, the push plate is driven to move towards the film-coating platform. The push plate contacts the rear side of the stacked packaged finished product and pushes it forward from the unloading end of the second conveying assembly to a specific position on the film-coating platform.

[0041] Compared with the prior art, the present invention has the following beneficial effects: This invention uses sleeve packaging film (pre-sealed cylindrical film with open ends) as the base material. A continuous unwinding assembly feeds the film, and a cutting and sealing assembly simultaneously performs fixed-length cutting and one-end pre-sealing online, achieving near-continuous flow production. The subsequent bag-supporting assembly and pusher assembly work together to achieve precise film fitting and positioning. The bag-supporting assembly stably and repeatedly opens the open end of the sleeve packaging film precisely, forming a channel of consistent size. The pusher assembly and conveyor assembly work together to ensure that the stacked packaged product is smoothly and centrally pushed into the sleeve packaging film along a straight line. This active pushing method prevents the product from shifting or tilting within the packaging film. The subsequent 90-degree rotation of the lifting and rotating assembly ensures that the opening end of the packaging film, which will ultimately be heat-sealed, is in the optimal position, facilitating thorough gas removal and uniform heat sealing by the vacuum heat-sealing assembly, greatly improving the reliability of the vacuum level and sealing performance. The sealing on one side of the packaging film is completed under controlled conditions in the cutting and sealing assembly, ensuring stable quality; the sealing of the final open end is completed in a vacuum environment in the vacuum heat sealing assembly. Both heat sealing processes are carried out under optimal conditions, ensuring the overall sealing strength and consistency of the packaging and significantly reducing the leakage rate.

[0042] The heat-sealing and sleeve-wrapping machine provided by this invention successfully integrates three major advantages: high-efficiency continuous production, high-precision stable sleeve wrapping, and high-quality vacuum sealing by adopting an original technical route of "continuous sleeve film unwinding + online one-end pre-sealing + precise stretching and pushing + rotary vacuum final sealing". All components (conveyor, fixed-length cutting and heat sealing, traction, bag supporting, material pushing, rotation, and vacuum heat sealing) work collaboratively under the scheduling of a central control system, with actions interlocking and overlapping. For example, while pushing the film for sleeve wrapping, subsequent film materials may be being cut and sealed, greatly reducing idle time between processes and resulting in a compact and efficient overall production rhythm. Attached Figure Description

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0044] Figure 1This is a schematic diagram of the overall structure of the heat-sealing sleeve machine in this invention; Figure 2 This is a partial structural diagram of the second transmission component in this invention; Figure 3 This is a schematic diagram of the material pushing component in this invention; Figure 4 This is a schematic diagram of the unwinding assembly in this invention; Figure 5 This is a partial structural diagram of the cutting and sealing component in this invention; Figure 6 This is a schematic diagram of the eccentric rubber roller in this invention; Figure 7 This is a schematic diagram of the structure of the traction roller shaft in this invention; Figure 8 This is a schematic diagram of the internal structure of the cutting and sealing assembly in this invention; Figure 9 for Figure 8 Side view; Figure 10 This is a schematic diagram of the structure of the cutting assembly and the heat sealing assembly in this invention; Figure 11 This is a schematic diagram of the press-fit pull-down assembly in this invention; Figure 12 This is a schematic diagram of the structure of the upper clamping assembly and the lower pressing assembly in this invention; Figure 13 This is a partial structural diagram of the lower pressure film assembly in this invention; Figure 14 This is a partial structural schematic diagram of the upper bag clamping assembly in this invention; Figure 15 This is a schematic diagram of the material clamping and traction assembly in this invention; Figure 16 This is a schematic diagram of the lifting and rotating assembly in this invention.

[0045] The specific reference numerals in the attached figures are as follows: Bracket 1, First conveying assembly 2, conveying roller assembly 201, conveying roller shaft 202. Second transmission component 3, Stacked component 4, Material pushing assembly 5, linear sliding drive component 501, linear slide table 502, lifting cylinder 503, mounting component 504, push plate 505. Fourth fixing plate 6, Unwinding assembly 7, unwinding roller 701, guide shaft 702, Downward traction assembly 8, traction roller shaft 801, eccentric rubber roller 802. Cut and seal component 9, The components include: a cutter assembly 10, a cutter 1001, a pusher plate 1002, a position sensor 1003, a lower pressure plate 1004, a first upper pressure plate 1005, a first mounting plate 1006, a first telescopic drive assembly 1007, a first telescopic cylinder 1008, a second mounting plate 1009, a second telescopic drive assembly 1010, an adjusting plate 1011, a second telescopic cylinder 1012, and a guide column 1013. Heat sealing assembly 11, side plate 1101, heating plate 1102, heat sealing end 1103, mounting base 1104, elastic element 1105, heating rod 1106, second upper pressure plate 1107. The components include: a pressing and pulling assembly 12, a support plate 1201, a U-shaped mounting plate 1202, a linear lifting drive assembly 1203, a clamping plate 1204, a third telescopic drive assembly 1205, and a guide plate 1206. Material clamping and traction assembly 13, linear drive assembly 1301, third fixing plate 1302, first rotary cylinder 1303, gripper cylinder 1304. Bag support assembly 14, The components include: upper clamping assembly 15, fixing frame 1501, upper suction cup assembly 1502, upper bag clamping assembly 1503, lateral sliding assembly 1504, first fixing plate 1505, vertical sliding drive assembly 1506, second fixing plate 1507, connecting arm 1508, support plate 1509, and pressure plate 1510. The components include: lower pressing assembly 16, horizontal support plate 1601, lower suction cup assembly 1602, vertical fixing plate 1603, first lead screw 1604, sliding block 1605, telescopic cylinder 1606, lower pressing component 1607, side baffle 1608, and guide plate 1609. Lifting and rotating assembly 17, belt conveyor assembly 1701, mounting frame 1702, blocking cylinder 1703, blocking plate 1704, lifting cylinder 1705, second rotating cylinder 1706. Vacuum heat sealing assembly 18. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] An embodiment of the present invention discloses a heat-sealing sleeve machine, such as... Figure 1As shown, it includes a support 1, a first conveying assembly 2, a second conveying assembly 3, an unwinding assembly 7, a cutting and sealing assembly 9, a material clamping and traction assembly 13, a bag supporting assembly 14, a material pushing assembly 5, a lifting and rotating assembly 17, and a vacuum heat sealing assembly 18. The support 1 is equipped with a first conveying component 2 and a second conveying component 3, a lifting and rotating component 17 and a vacuum heat sealing component 18, all with the same conveying direction. The first conveying component 2 conveys the stacked finished products to the loading end of the second conveying component 3. The unwinding assembly 7 and the cutting and sealing assembly 9 are located above the second conveying assembly 3. The unwinding assembly 7 is used to continuously unwind the sleeve packaging film along the length direction. The sleeve packaging film has a structure with open ends, sealed sides and hollow interior along the length direction. The unwound sleeve packaging film enters the cutting and sealing assembly 9 for simultaneous fixed-length cutting and end sealing operations. The clamping and traction assembly 13 is installed on the side of the second conveying assembly 3. It pulls the sleeve packaging film with one open end after the end sealing and cutting operation to the feeding end of the second conveying assembly 3, and the open end of the sleeve packaging film faces the first conveying assembly 2. The bag-supporting assembly 14 is located at the feeding end of the second conveying assembly 3. It opens the opening end of the sleeve packaging film conveyed by the clamping and traction assembly 13. The pushing assembly 5 pushes the stacked finished product conveyed to the feeding end of the second conveying assembly 3 from the opening end of the sleeve packaging film into its interior for film covering operation. After being wrapped in film, the stacked packaged product is conveyed by the second conveying component 3 to the lifting and rotating component 17. The lifting and rotating component 17 rotates the wrapped packaged product by 90 degrees and conveys it to the vacuum heat sealing component 18 to vacuum the inside of the sleeve packaging film and heat seal the open end of the sleeve packaging film.

[0048] Using sleeve packaging film (pre-sealed cylindrical film with open ends) as the base material, the unwinding assembly 7 continuously supplies material, and the cutting and sealing assembly 9 simultaneously completes fixed-length cutting and one-end pre-sealing online, achieving near-continuous flow production. Subsequently, the bag-supporting assembly 14 and the pushing assembly 5 work together to achieve precise film fitting and positioning. The bag-supporting assembly 14 can stably and repeatedly and accurately open the open end of the sleeve packaging film to form a channel of consistent size. The pushing assembly 5 works with the conveying assembly to ensure that the stacked finished product is pushed smoothly and centrally into the sleeve packaging film along a straight line. This active pushing method avoids the product shifting or tilting inside the packaging film. Subsequently, the 90-degree rotation of the lifting and rotating assembly 17 ensures that the open end of the packaging film that needs to be heat-sealed is in the optimal position, which facilitates the vacuum heat-sealing assembly 18 to thoroughly remove gas and perform uniform heat sealing, greatly improving the reliability of vacuum degree and sealing performance.

[0049] Among them, such as Figure 12As shown, the bag support assembly 14 includes a lower pressing film assembly 16 and an upper clamping assembly 15. The lower pressing film assembly 16 is installed at the feeding end of the second conveying assembly 3 to suck up and press down the lower piece of the single packaging film at the open end. The upper clamping assembly 15 is installed above the feeding end of the second conveying assembly 3 to suck up and pull up the upper piece of the single packaging film at the open end. The upper clamping assembly 15 and the lower pressing film assembly 16 cooperate to open up the open end of the sleeve packaging film located at the feeding end of the second conveying assembly 3. The stacked finished products are sequentially conveyed to the loading end of the second conveyor component 3 by the first conveyor component 2. The single sleeve packaging film with one end cut and sealed is sequentially pulled to the loading end of the second conveyor component 3 by the clamping and traction component 13. Then, the upper clamping component 15 and the lower pressing component 16 cooperate to open the opening end of the single packaging film at the loading end of the second conveyor component 3 to form a sufficiently large opening space for the stacked finished products to enter. Then, the pushing component 5 pushes the stacked finished products from the opening end of the single packaging film into its interior. The whole action is compact and smooth, which can accurately and smoothly push the stacked finished products to the center position inside the packaging film, ensuring the quality of product sealing and packaging.

[0050] Specifically, such as Figure 12 and 13As shown, the lower film pressing assembly 16 includes a horizontal support plate 1601, which is located at the feeding end of the second conveying assembly 3. A lower suction cup assembly 1602 for picking up the lower piece of the single packaging film at the open end is installed on the horizontal support plate 1601. Two vertical fixing plates 1603 arranged side by side are installed at the bottom of the horizontal support plate 1601. A first lead screw 1604 is installed between the vertical fixing plates 1603. Two sliding blocks 1605 are installed on the first lead screw 1604. Telescopic cylinders 1606 are respectively installed on the top of the sliding blocks 1605. A horizontal pressing member 1607 is installed at the driving end of the telescopic cylinder 1606. The telescopic cylinder 1606 drives the pressing member 1607 to extend and press down and fix the lower piece of the single packaging film at the open end on the horizontal support plate 1601. After the clamping and traction assembly 13 pulls the single sleeve packaging film to the loading end of the second conveying assembly 3, the lower suction cup assembly 1602 is activated, and the lower piece of the single packaging film at the open end is adsorbed onto the horizontal support plate 1601. Simultaneously, the upper clamping assembly 15 also starts working, adsorbing and moving the upper piece of the single sleeve packaging film at the open end upward. Subsequently, the telescopic cylinder 1606 controls the two lower pressing parts 1607 to extend towards the sleeve packaging film. The height of the lower pressing parts 1607 is slightly higher than the horizontal support plate. At a height of 1601, the pressing component 1607 cooperates with the transverse support plate 1601 to press down and fix the lower piece of the single sleeve packaging film at the open end. When the subsequent stacked finished product is pushed inward from the open end of the single sleeve packaging film, the stacked finished product contacts the pressing component 1607, but does not directly contact the lower piece of the single sleeve packaging film at the open end. This avoids the lower piece of the single sleeve packaging film at the open end from curling inward due to inward friction when the stacked finished product is pushed inward, which would affect the film wrapping operation of the stacked finished product.

[0051] Preferably, the distance between the two sliding blocks 1605 is adjustable, and the tops of the two pressing members 1607 are provided with side baffles 1608 on opposite sides for contacting and opening the lower sides of the opening end of the single-piece packaging film. A guide plate 1609 is provided on the side of the two pressing members 1607 facing the first conveying assembly 2. The guide plate 1609 is an L-shaped outward-expanding structure matching the shape of the end of the pressing member 1607. Before use, the distance between the two sliding blocks 1605 is adjusted according to the size of the opening end of the sleeve packaging film to ensure the opening effect of the pressing member 1607 on the lower part of the opening end of the single-piece sleeve packaging film. Furthermore, the side baffles 1608 and the pressing members 1607 cooperate to form an L-shaped opening structure. On the one hand, this provides a better opening effect on the lower part of the opening end of the single-piece sleeve packaging film; on the other hand, it also forms a protective structure when in contact with the lower part of the opening end of the sleeve packaging film, preventing the sharp edges of the side baffles 1608 from directly contacting the opening end of the sleeve packaging film and easily causing tearing of the sleeve packaging film. By providing an L-shaped outward-expanding guide plate 1609 on the outside of the pressing member 1607, it is easy to push the stacked finished product through the pressing member 1607 and smoothly orient it into the sleeve packaging film.

[0052] Specifically, such as Figure 12 and 14 As shown, the upper clamping assembly 15 includes a fixed frame 1501, an upper suction cup assembly 1502, and an upper bag clamping assembly 1503. The fixed frame 1501 is mounted on the bracket 1. The fixed frame 1501 is equipped with the vertically retractable upper suction cup assembly 1502 and the upper bag clamping assembly 1503. The upper suction cup assembly 1502 sucks the upper piece of the single packaging film at the open end upwards, and the upper bag clamping assembly 1503 clamps the upper piece of the single packaging film at the open end on both sides to support the bag. During operation, the clamping and traction assembly 13 pulls the single sleeve packaging film to the loading end of the second conveying assembly 3. Then, the lower suction cup assembly 1602 and the upper suction cup assembly 1502 work synchronously to separate the opening end of the sleeve packaging film. The upper suction cup assembly 1502 picks up the upper piece of the opening end of the sleeve packaging film and moves it close to the upper bag clamping assembly 1503. The upper bag clamping assembly 1503 then clamps the upper piece of the opening end of the single sleeve packaging film on both sides to support the bag, forming a stable open structure at the opening end of the sleeve packaging film.

[0053] The upper bag clamping assembly 1503 includes a horizontal sliding component 1504, a first fixing plate 1505, a second fixing plate 1507, a connecting arm 1508, a tray 1509, and a pressure plate 1510. The horizontal sliding component 1504 is mounted on the fixed frame 1501. The first fixing plate 1505 is mounted on the driving end of the horizontal sliding component. A vertical sliding drive component 1506 is mounted on the first fixing plate 1505. The second fixing plate 1507 is mounted on the driving end of the vertical sliding drive component 1506. Two vertically arranged connecting arms 1508 with an adjustable distance between them are mounted on the second fixing plate 1507. The tray 1509 and the pressure plate 1510 are arranged side by side at the bottom inner side of the connecting arm 1508. The pressure plate 1510 is located directly above the tray 1509 and can move up and down. It cooperates with the tray 1509 to clamp the upper piece of the single packaging film at the opening end. Through the above structural design, the spacing between the connecting arms 1508 is adjustable. The connecting arms 1508 can move laterally along the conveying direction of the second conveying component 3 and can move up and down vertically. During operation, after the upper suction cup component 1502 picks up the upper piece of the sleeve packaging film opening and lifts it upward, the connecting arms 1508 are controlled to move until the upper piece of the sleeve packaging film opening is located between the tray 1509 and the pressure plate 1510. The pressure plate 1510 is then controlled to move downward and contact the tray 1509 for clamping. The upper suction cup component 1502 stops its suction operation and drives the connecting arms 1508 to move upward to a specific position, thereby realizing the upward pulling and opening operation of the upper two sides of the sleeve packaging film opening.

[0054] Among them, such as Figure 15As shown, the clamping and traction assembly 13 includes a linear drive assembly 1301, a third fixing plate 1302, a first rotary cylinder 1303, and a gripper cylinder 1304. The second conveying assembly 3 has linear drive assemblies 1301 mounted on both sides along the conveying direction. The driving ends of the linear drive assemblies 1301 are respectively mounted with the third fixing plate 1302. The first rotary cylinder 1303 is mounted on the third fixing plate 1302, and the driving end of the first rotary cylinder 1303 is mounted with a gripper cylinder 1304. The two gripper cylinders 1304 respectively clamp the two sides of the single-piece packaging film feeding end and pull it to the feeding end of the second conveying assembly 3. Through the above structural design, the clamping and feeding operation of the sleeve packaging film is realized, while not affecting the conveying of the stacked products after film wrapping by the second conveying assembly 3.

[0055] Among them, such as Figure 5 and Figure 8 As shown, the cutting and sealing assembly 9 includes a fourth fixing plate 6, a downward traction assembly 8, a cutter assembly 10, a heat sealing assembly 11, and a pressing and pulling assembly 12. The downward traction assembly 8, the cutter assembly 10, and the pressing and pulling assembly 12 are installed sequentially from top to bottom on the inner side of the fourth fixing plate 6. The heat sealing assembly 11 is installed on the inner side of the fourth fixing plate 6. The heat sealing end 1103 in the heat sealing assembly 11 is directly opposite to the lower pressure plate 1004 in the cutter assembly 10. The cutter 1001 in the cutter assembly 10 is located directly above the lower pressure plate 1004. The cutter 1001 can move relative to the lower pressure plate 1004 and is in a retracted state and an extended state. The distance between the heat sealing assembly 11 and the cutter assembly 10 is adjustable. The downward traction component 8 continuously pulls and conveys the unwound sleeve packaging film downwards. The sleeve packaging film passes through the gap formed between the heat sealing component 11 and the cutter component 10 and enters the pressing and pulling component 12. The pressing and pulling component 12 clamps the end of the sleeve packaging film and pulls it down to a specific position. There are three states between the heat sealing assembly 11 and the cutting assembly 10. State mode 1: A gap is formed between the heat sealing assembly 11 and the cutting assembly 10 for the sleeve packaging film to pass downward. State mode 2: The heat sealing end 1103 of the heat sealing assembly 11 contacts the lower pressure plate 1004 in the cutting assembly 10 to perform a heat sealing operation on the sleeve packaging film, and the cutting blade 1001 is in a retracted state. State mode 3: The cutting blade 1001 is controlled to be in an extended state and cuts at a position above the heat sealing point of the sleeve packaging film.

[0056] In this invention, a sleeve packaging film is directly used, which only requires heat sealing and cutting at one end, leaving an opening on one side for product insertion. The sleeve packaging film is continuously unwound by the unwinding assembly 7. Initially, the film is manually fed, pulling one end of the sleeve packaging film to the downward traction assembly 8. During the unloading process, the heat sealing assembly 11 and the cutting assembly 10 are in state mode one: the cutter 1001 is in a retracted state, and the heat-sealed end 1103 of the heat sealing assembly 11 separates from the lower pressure plate 1004 in the cutting assembly 10, forming a gap. The sleeve packaging film enters downward to the pressing and pulling assembly 12, which clamps the end of the sleeve packaging film and pulls it downward to a specific position (through the lower... (The length of the packaging film can be controlled by pulling the length). At this time, the heat sealing assembly 11 and the cutting assembly 10 are in state mode two: the right push plate 1002 is pushed out, and the lower pressure plate 1004 in the cutting assembly 10 contacts the heat sealing end 1103 of the heat sealing assembly 11 to perform a heat sealing operation on the sleeve packaging film. After the heat sealing is completed, the heat sealing assembly 11 and the cutting assembly 10 are in state mode three: the right cutter 1001 is pushed out and cuts at the position above the heat sealing point of the sleeve packaging film. The above operation is repeated to realize continuous heat sealing and cutting of the packaging film. Moreover, the material pulling, cutting and heat sealing processes are almost synchronized, simplifying the material feeding process and forming a continuous and efficient production cycle.

[0057] Specifically, such as Figure 8-10As shown, the cutter assembly 10 includes a push plate 1002, a cutter 1001, a lower pressure plate 1004, a first mounting plate 1006, and a second mounting plate 1009. The first mounting plate 1006 and the second mounting plate 1009 are fixedly mounted on the inner side of the fourth fixing plate 6. A first telescopic drive assembly 1007 is mounted on the first mounting plate 1006, and a second telescopic drive assembly 1010 is mounted on the second mounting plate 1009. The drive end of the first telescopic drive assembly 1007 has a push plate 1002. A transverse lower pressure plate 1004 is mounted on the side of the push plate 1002 facing the heat sealing assembly 11. The cutter 1001 is located directly above the lower pressure plate 1004 and is connected to the drive end of the second telescopic drive assembly 1010. The cutter 1001 and the push plate 1002 are driven by different drive mechanisms, realizing separate control of the lower pressure plate 1004 on the cutter 1001 and the push plate 1002. Specifically, the first telescopic drive assembly 1007 consists of multiple first telescopic cylinders 1008 arranged side by side. The first telescopic cylinders 1008 are mounted on the first mounting plate 1006, and their drive ends pass through the first mounting plate 1006 and are driven to connect with the push plate 1002 on the side opposite to the heat sealing assembly 11. During operation, the first telescopic cylinders 1008 synchronously drive the push plate 1002 on the right side to extend or retract, thereby achieving separation or contact between the lower pressure plate 1004 and the heat sealing end 1103 of the heat sealing assembly 11. The second telescopic drive assembly 1010 includes an adjusting plate 1011, a second telescopic cylinder 1012, and guide posts 1013. The adjusting plate 1011 is located outside the second mounting plate 1009, and the two are arranged side by side. The second telescopic cylinder 1012 is installed on the side of the second mounting plate 1009 away from the heat-sealing assembly 11, and its driving end is connected to the adjusting plate 1011. Guide posts 1013 are respectively provided at both ends of the adjusting plate 1011. One end of the guide post 1013 passes through the second mounting plate 1009 and the first mounting plate 1006, and is respectively connected to both sides of the end of the cutter 1001. During operation, through the structural cooperation of the second telescopic cylinder 1012, the adjusting plate 1011, and the guide posts 1013, the cutter 1001 can be driven to extend smoothly for cutting, or retract without affecting the passage of the packaging film.

[0058] Preferably, a first upper pressure plate 1005 is also installed on the side of the push plate 1002 facing the heat sealing assembly 11. The first upper pressure plate 1005 is located above the cutter 1001. A second upper pressure plate 1107 is provided above the heat sealing end 1103 of the heat sealing assembly 11. Under the action of the first telescopic drive assembly 1007, the first upper pressure plate 1005 extends and docks with the second upper pressure plate 1107 or the first upper pressure plate 1005 retracts and separates from the second upper pressure plate 1107 to form a gap for the sleeve packaging film to pass through downward. During the movement of the push plate 1002 driven by the first telescopic drive assembly 1007, the first upper pressure plate 1005 and the lower pressure plate 1004 can move synchronously. When the packaging film needs to be cut and heat-sealed, the push plate 1002 located on the right side is first pushed out by the first telescopic drive assembly 1007. The first upper pressure plate 1005 and the lower pressure plate 1004 move synchronously toward the heat-sealing assembly 11. The first upper pressure plate 1005 contacts and presses the packaging film with the second upper pressure plate 1107. At the same time, the end of the lower pressure plate 1004 contacts and presses the heat-sealing end 1103 of the heat-sealing assembly 11 to perform a heat-sealing operation on the packaging film. When the second telescopic drive assembly 1010 pushes out the cutter 1001 located on the right side to cut the packaging film, the cutting is ensured to proceed smoothly and the cut is flatter. The problem of uneven cut caused by the cutting force of the cutter 1001 pulling the packaging film downward will not occur.

[0059] Preferably, a position sensor 1003 is installed on the push plate 1002. Through the cooperation of the position sensor 1003 and the controller, the moving distance of the lower pressure plate 1004 and the first upper pressure plate 1005 on the push plate 1002 can be precisely controlled, ensuring the heat sealing effect of the heat sealing end 1103 of the heat sealing assembly 11 and the lower pressure plate 1004 on the packaging film, as well as the pressing effect of the first upper pressure plate 1005 and the second upper pressure plate 1107 on the packaging film.

[0060] The heat-sealing assembly includes a side plate 1101, a heating plate 1102, a heating rod 1106, and a second upper pressure plate 1107. The side plate 1101 is fixed to a fourth fixing plate 6. The heating plate 1102 and the second upper pressure plate 1107 are installed on the side of the side plate 1101 facing the cutter assembly 10. The heating rod 1106 is installed inside the heating plate 1102, and the second upper pressure plate 1107 is located directly above the heating plate 1102. The working principle of the heat-sealing assembly is as follows: the heating rod 1106 heats the heating plate 1102, and the heated heating plate 1102 contacts and presses against the lower pressure plate 1004, thus pressing and sealing the packaging film located between the two.

[0061] In a specific embodiment, the heating plate 1102 forms a tapered heat-sealing end 1103 on the side facing the lower pressure plate 1004. This design ensures the neatness and dimensional control of the heat-sealing pressing surface.

[0062] Multiple mounting seats 1104 are installed on the side of the heating plate 1102 away from the cutter assembly 10. The mounting seats 1104 are connected to the side plate 1101 by elastic elements 1105. Through the above structural design, when the heat sealing end 1103 of the heat sealing assembly comes into contact with the lower pressure plate 1004, it has a certain elastic buffer force, which ensures that the pressure of the packaging film during the heat sealing operation is moderate and uniform, thereby ensuring the heat sealing effect of the packaging film.

[0063] Specifically, such as Figure 8 , 9 As shown in Figure 11, the pressing and pulling assembly 12 includes a support plate 1201, a U-shaped mounting plate 1202, a linear lifting drive assembly 1203, two clamping plates 1204, and a third telescopic drive assembly 1205. The support plate 1201 is installed on the inner side of the fourth fixed plate 6. The linear lifting drive assembly 1203 is installed on the support plate 1201. The output end of the linear lifting drive assembly 1203 is installed with the U-shaped mounting plate 1202. The clamping plates 1204 are arranged side by side between the two side arms of the U-shaped mounting plate 1202. The third telescopic drive assembly 1205 is installed inside the groove of the U-shaped mounting plate 1202. The third telescopic drive assembly 1205 is driven to connect with the outer side of one of the clamping plates 1204. Under the action of the third telescopic drive assembly 1205, the two clamping plates 1204 separate to form a clamping position for the end of the sleeve packaging film to enter, or the two clamping plates 1204 are connected to press the end of the sleeve packaging film for subsequent pulling-down operation. The pressing and pressing assembly has dual functions of pulling down and clamping. In the initial position, the linear lifting drive assembly 1203 is in the retracted state, and the two clamping plates 1204 are located close to the heat sealing assembly 11 to avoid the sleeve packaging film from shifting position due to long-distance material feeding. When the sleeve packaging film is pulled down into the feeding position formed between the two clamping plates 1204 of the pressing and pulling assembly 12, under the action of the third telescopic drive assembly 1205, the two clamping plates 1204 are joined and pressed against the end of the sleeve packaging film. Then, the linear lifting drive assembly 1203 drives the two clamping plates 1204 to pull the end of the sleeve packaging film down to a specific length. The length of the packaging film bag can be controlled by the pull-down length of the linear lifting drive assembly 1203. Subsequently, the packaging film is heat-sealed and cut to complete the processing of a sleeve packaging film bag.

[0064] Preferably, two inclined guide plates 1206 are installed on the top of the two side arms of the U-shaped mounting plate 1202, with the two guide plates 1206 respectively located directly above the two clamping plates 1204. Because the packaging film is lightweight, its ends may deviate slightly when fed downwards. The guide plates 1206 guide the ends of the sleeve packaging film to be oriented between the two clamping plates 1204 for clamping. The fixed-length cutting function of the cutting and sealing assembly 9 allows it to quickly adapt to packaging requirements of different lengths (corresponding to product heights), with convenient adjustments and short changeover times. The entire equipment is highly compatible with various finished product forms such as boxed, bagged, and regularly stacked block packaging, demonstrating strong versatility.

[0065] Among them, such as Figure 5-7 As shown, the downward traction assembly 8 includes a traction roller shaft 801 and an eccentric rubber roller 802 mounted side-by-side on the side of the fourth fixed plate 6. The unwound sleeve packaging film is pulled downward through the clamping gap formed between the traction roller shaft 801 and the eccentric rubber roller 802. The traction roller shaft 801 is driven by a motor, providing downward traction force. The eccentric rubber roller 802, as a driven component, is movable. Under pressure, the rubber surface of the eccentric rubber roller 802 contacts the surface of the traction roller shaft 801, forming a narrow clamping area (or bite-in), achieving a stable and continuous downward traction action. By rotating the eccentric shaft in the eccentric rubber roller 802 through a handle, the position of the rubber roller will change slightly relative to the fixed traction roller. The operator can precisely control the force of the rubber roller pressing against the traction roller shaft 801 to dynamically adjust the core performance of the entire downward traction assembly 8—the clamping force on the film material.

[0066] In order to better utilize the gravity of the packaging film to achieve the feeding of the packaging film, the working points of the downward traction component 8, the cutting component 10, the heat sealing component 11, and the pressing and pulling component 12 are all located on the same vertical line.

[0067] Among them, such as Figure 1 and Figure 4 As shown, the unwinding assembly 7 includes an unwinding roller 701 and multiple guide shafts 702 mounted on the side of the fourth fixed plate 6. The outer side of the unwinding roller 701 is used to place the sleeve packaging film roll. The unwound sleeve packaging film is guided by the multiple guide shafts 702 to the downward traction assembly 8. The unwinding roller 701 is an air-expanding shaft, which facilitates the feeding of the roll. The unwinding roller 701 is driven by a motor and continuously unwinds the sleeve packaging film. The guide shafts 702 guide the film to the cutting and sealing assembly 9 for subsequent length fixing, heat sealing, and cutting operations.

[0068] Among them, such as Figure 2 and Figure 3As shown, the pushing component 5 is integrated into the first conveying component 2. Under normal conditions, the pushing component 5 is located below the first conveying component 2. When the stacked finished product is conveyed to the end of the first conveying component 2, the pushing component 5 passes through the gap of the first conveying component 2 and pushes the stacked finished product toward the second conveying component 3. The first conveying component 2 is equipped with a stacking component 4 at the loading end for stacking finished products from bottom to top (the stacking component 4 can be a structural component with the function of stacking finished products vertically, such as the combination of a vacuum generator and a lifting component to realize the stacking of two packaged finished products; or other structural components can be used to realize the vertical stacking of multiple packaged finished products). The pushing component 5 is installed near the unloading end of the first conveying component 2. The conveying roller component 201 near the unloading end of the first conveying component 2 includes two oppositely arranged conveying roller shafts 202. A gap is reserved between the opposite ends of the two conveying roller shafts 202 so that when the pushing component 5 is needed later, the pushing end of the pushing component 5 can smoothly pass through the gap between the front and rear of the conveying roller component 201 in the first conveying component 2 and the gap between the ends of the conveying roller shafts 202. This structure is ingeniously designed, integrating the pushing component 5 into a single unit. The structure is compact and synchronously automates the stacking and packaging of finished products, as well as the precise and directional delivery to a specific position for subsequent film wrapping operations.

[0069] Specifically, the feeding assembly 5 includes a linear sliding drive 501, a linear slide 502, a lifting cylinder 503, a mounting component 504, and a push plate 505. The linear slide 502 is installed between the bracket 1 and the second conveying assembly 3, and the length direction of the linear slide 502 is consistent with the conveying direction of the second conveying assembly 3. The lifting cylinder 503 is slidably installed on the linear slide 502. Under the action of the linear sliding drive 501, the lifting cylinder 503 is driven to move along the length direction of the linear slide 502. The driving direction of the lifting cylinder 503 is vertically upward, and a horizontally arranged mounting component 504 is installed at the driving end of the lifting cylinder 503. A push plate 505 is installed at the end of the mounting component 504. In normal operation, the lifting cylinder 503 lowers the mounting component 504 and the push plate 505, which are hidden below the second conveying assembly 3. When the packaged finished product after stacking is conveyed to the middle of the second conveying assembly 3 or close to the unloading end, the lifting cylinder 503 is controlled to raise the mounting component 504 and the push plate 505. The mounting component 504 and the push plate 505 pass through the gap between the ends of the second conveying roller shaft 202 and the gap between the front and rear of the conveying roller assembly 201, respectively. Then, through the cooperation of the linear sliding drive component 501 and the linear slide table 502, the push plate 505 is driven to move towards the film-coating platform. The push plate 505 contacts the rear side of the packaged finished product and pushes it forward from the unloading end of the second conveying assembly 3 to a specific position on the film-coating platform.

[0070] Among them, such as Figure 16As shown, the lifting and rotating assembly 17 is installed at the unloading end of the first conveying assembly 2. It includes two belt conveying assemblies 1701 arranged symmetrically front to back on the bracket 1. A gap is formed between the two belt conveying assemblies 1701. A blocking plate 1704 is provided on the side of the belt conveying assembly 1701 away from the first conveying assembly 2. A mounting frame 1702 is provided below the belt conveying assembly 1701. The mounting frame 1702 is mounted on the bracket 1. A lifting cylinder 1705 is mounted on the mounting frame 1702. A second rotating cylinder 1706 is mounted on the driving end of the lifting cylinder 1705. A receiving plate is mounted on the driving end of the second rotating cylinder 1706. The receiving plate can pass upward through the gap between the two belt conveying assemblies 1701. A blocking cylinder 1703 is mounted on the mounting frame 1702. A blocking plate 1704 is mounted on the output end of the blocking cylinder 1703. The laminated packaged product is conveyed to the first conveyor assembly 2. The blocking cylinder 1703 drives the blocking plate 1704 to rise, blocking the laminated packaged product. The lifting cylinder 1705 and the second rotating cylinder 1706 cooperate to lift the laminated packaged product and rotate it 90 degrees. Then, the lifting cylinder 1705 and the second rotating cylinder 1706 cooperate to lower the laminated packaged product and place it on the belt conveyor assembly 1701. The blocking cylinder 1703 drives the blocking plate 1704 to fall. The belt conveyor assembly 1701 transports the laminated packaged product to the vacuum heat sealing assembly 18 for vacuuming and end heat sealing of the packaging film.

[0071] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat-shrink sleeve applicator characterized by, The device comprises a support, a first conveying assembly, a second conveying assembly, a unwinding assembly, a cutting and sealing assembly, a clamping and pulling assembly, a bag opening assembly, a pushing assembly, a lifting and rotating assembly and a vacuum heat sealing assembly. The support is provided with the first conveying assembly, the second conveying assembly, the lifting and rotating assembly and the vacuum heat sealing assembly, which are arranged in the same conveying direction, the first conveying assembly conveying the stacked products to the feeding end of the second conveying assembly. The unwinding assembly and the cutting and sealing assembly are arranged above the second conveying assembly, the unwinding assembly continuously unwinding the sleeve packaging film along the length direction, the sleeve packaging film being of a structure with both ends open along the length direction, both sides sealed and the inside hollow through, the unwound sleeve packaging film entering the cutting and sealing assembly to be synchronously cut to a fixed length and sealed at the ends. The clamping and pulling assembly is arranged beside the second conveying assembly, the clamping and pulling assembly pulling the sleeve packaging film with one end open after the cutting and sealing operation to the feeding end of the second conveying assembly, and the open end of the sleeve packaging film facing the first conveying assembly. The bag opening assembly is arranged at the feeding end of the second conveying assembly, the bag opening assembly opening the open end of the sleeve packaging film conveyed by the clamping and pulling assembly, the pushing assembly pushing the stacked products conveyed to the feeding end of the second conveying assembly to the inside of the sleeve packaging film to be sleeved by the sleeve packaging film. The sleeved stacked products are conveyed by the second conveying assembly to the lifting and rotating assembly, the lifting and rotating assembly rotating the sleeved stacked products by 90 degrees and conveying the sleeved stacked products to the vacuum heat sealing assembly to vacuumize the inside of the sleeve packaging film and heat seal the open end of the sleeve packaging film.

2. The heat-shrink sleeve machine of claim 1, wherein, The bag opening assembly comprises a lower film pressing assembly and an upper clamping assembly, the feeding end of the second conveying assembly is provided with the lower film pressing assembly for sucking and pressing down the lower piece of the open end of the single packaging film, the upper part of the feeding end of the second conveying assembly is provided with the upper clamping assembly for sucking and pulling up the upper piece of the open end of the single packaging film, the upper clamping assembly and the lower film pressing assembly cooperate to open the open end of the sleeve packaging film at the feeding end of the second conveying assembly.

3. The heat-shrink sleeve machine of claim 2, wherein, The lower film pressing assembly comprises a transverse support plate arranged at the feeding end of the second conveying assembly, the transverse support plate is provided with a lower suction disc assembly for sucking the lower piece of the open end of the single packaging film, the bottom of the transverse support plate is provided with two vertically arranged fixed plates arranged side by side, the first screw rod is arranged between the two fixed plates, the first screw rod is provided with two sliding blocks, the top of the sliding blocks is provided with a telescopic cylinder, the driving end of the telescopic cylinder is provided with a transverse pressing piece, the telescopic cylinder drives the pressing piece to extend to press and fix the lower piece of the open end of the single packaging film on the transverse support plate.

4. The heat-shrink sleeve machine of claim 3, wherein, The distance between the two sliding blocks is adjustable, the top of the two pressing pieces is provided with a side baffle for contacting and opening the lower two sides of the open end of the single packaging film, the side of the two pressing pieces facing the first conveying assembly is provided with a guide plate, the guide plate is of an L-shaped outwardly expanded structure matching the shape of the end of the pressing piece.

5. The heat-shrink sleeve machine of claim 2, wherein, The upper clamping assembly comprises a fixed frame, an upper suction cup assembly and an upper bag clamping assembly, the fixed frame is installed on the support, the vertically retractable upper suction cup assembly and the upper bag clamping assembly are installed on the fixed frame, the upper suction cup assembly sucks the upper piece of the open end of the single piece of packaging film upward, and the upper bag clamping assembly clamps the two sides of the upper piece of the open end of the single piece of packaging film to support the bag.

6. The heat-shrink sleeve machine of claim 1, wherein, The cutting and sealing assembly comprises a fixed plate, a downward traction assembly, a cutter assembly, a heat sealing assembly and a pressing and downward pulling assembly, the downward traction assembly, the cutter assembly and the pressing and downward pulling assembly are sequentially installed on the inner side of the fixed plate from top to bottom, the heat sealing assembly is installed on the inner side of the fixed plate, the heat sealing end of the heat sealing assembly is opposite to the lower pressing plate of the cutter assembly, the cutter of the cutter assembly is located directly above the lower pressing plate, the cutter can move relative to the lower pressing plate and be in a retracted state and an extended state, and the spacing between the heat sealing assembly and the cutter assembly is adjustable. The downward traction assembly continuously pulls and conveys the unwound sleeve packaging film downward, the sleeve packaging film passes through the gap formed between the heat sealing assembly and the cutter assembly downward and enters the pressing and downward pulling assembly, and the pressing and downward pulling assembly clamps the end of the sleeve packaging film and pulls it downward to a specific position. The heat sealing assembly and the cutter assembly form three state modes, state mode one: a gap is formed between the heat sealing assembly and the cutter assembly for the sleeve packaging film to pass downward, state mode two: the heat sealing end of the heat sealing assembly is in contact with the lower pressing plate of the cutter assembly to perform pressing and heat sealing operation on the sleeve packaging film, and the cutter is in a retracted state, and state mode three: the cutter is controlled to be in an extended state to cut above the position of the pressing and heat sealing point of the sleeve packaging film.

7. The heat-shrink sleeve machine of claim 6, wherein, The cutter assembly comprises a push plate, a cutter, a lower pressing plate, a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate are fixedly installed on the inner side of the fixed plate, the first retractable drive assembly is installed on the first mounting plate, the second retractable drive assembly is installed on the second mounting plate, the drive end of the first retractable drive assembly is provided with the push plate, the push plate is installed on the side facing the heat sealing assembly and is provided with the transverse lower pressing plate, the cutter is located directly above the lower pressing plate, and the cutter is connected with the drive end of the second retractable drive assembly.

8. The heat-shrink sleeve machine of claim 7, wherein, The push plate is also installed on the side facing the heat sealing assembly and is provided with the transverse first upper pressing plate, the first upper pressing plate is located above the cutter, the heat sealing end of the heat sealing assembly is provided with the second upper pressing plate, under the action of the first retractable drive assembly, the first upper pressing plate is extended and is in butt joint and pressing with the second upper pressing plate or the first upper pressing plate is retracted and is separated from the second upper pressing plate to form a gap for the sleeve packaging film to pass downward.

9. The heat-shrink sleeve machine of claim 6, wherein, The pressing down-drawing assembly comprises a support plate, a U-shaped mounting plate, a linear lifting driving assembly, two clamping plates and a third telescopic driving assembly, the support plate is installed on the inner side of the fixed plate, the linear lifting driving assembly is installed on the support plate, the output end of the linear lifting driving assembly is provided with the U-shaped mounting plate, the two side arms of the U-shaped mounting plate are provided with the clamping plates arranged side by side, the third telescopic driving assembly is installed in the groove of the U-shaped mounting plate, and the third telescopic driving assembly is drivingly connected with the outer side of one of the clamping plates; under the action of the third telescopic driving assembly, the two clamping plates are separated to form a clamping position for the sleeve packaging film end to enter or the two clamping plates are butt-jointed to press the sleeve packaging film end to perform subsequent down-drawing operation.

10. The heat-shrink sleeve machine of claim 1, wherein, The pushing assembly is integrally installed in the first conveying assembly, and in the normal state, the pushing assembly is located below the first conveying assembly; when the stacked packaging products are conveyed to the end of the first conveying assembly, the pushing assembly is upwardly penetrated through the gap of the first conveying assembly, and the stacked packaging products are pushed towards the second conveying assembly.

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