Horizontal type plastic film thermoforming filling and sealing machine

Abstract

This utility model discloses a horizontal plastic film thermoforming filling and sealing machine, including a frame and a film feeding and folding mechanism and a servo bag pulling mechanism mounted on the frame. The servo bag pulling mechanism has a color mark detection mechanism, a heating mechanism, a cavity forming mechanism, a servo filling mechanism, a top sealing mechanism, and a cutting mechanism sequentially mounted on the frame along its traction path. The cavity forming mechanism includes an air blowing assembly and a pair of openable rear-heated cavity molds and a front-heated cavity mold respectively located on both sides of the air blowing assembly, forming a forming cavity with an open top. A roll of film printed with a bag pattern is folded into a plastic film after passing through the film feeding and folding mechanism. The plastic film is then heated and formed by the heating mechanism and the cavity forming mechanism to form a continuous bag. After filling and sealing, the bag is cut into finished products by the cutting mechanism. This utility model realizes the process of turning a roll of film into a finished product of irregularly shaped bags, improving production efficiency and offering greater flexibility.

Description

Technical Field

[0001] This utility model relates to the field of flexible packaging equipment technology, and in particular to a horizontal plastic film thermoforming filling and sealing machine. Background Technology

[0002] Flexible packaging technology uses plastic film or composite film as packaging material and employs heat sealing, thermoforming, and other methods to form packaging units. This type of packaging material is lightweight, easy to transport, and inexpensive, significantly reducing packaging expenses. It comes in various forms, and can be designed according to product characteristics, such as irregularly shaped bags, strip packs, and extruded packs. It can also integrate many functions such as tear-off, easy-extrusion design, and QR code printing. It has widely replaced traditional bottled, canned, and hard-box packaging and is rapidly gaining popularity in niche markets such as beverages, fruit purees, sauces, cheese sticks, energy gels, liquid medicines, and reagents.

[0003] Currently, the types of packaging equipment used in the domestic flexible packaging equipment market for filling liquids, pastes, small-dose or functional materials mainly include the following:

[0004] ① Vertical Roll Film Forming, Filling and Sealing Machine (VFFS): This type of equipment forms cylindrical bags longitudinally from roll film, suitable for liquids, powders, granules, and other materials. It is widely used in the dairy, condiment, sauce, and chemical raw material industries. The equipment has a relatively simple structure and high speed, making it suitable for continuous production. However, its disadvantages include its applicability only to regularly shaped bags, making it unsuitable for irregularly shaped packaging, poor bag size flexibility, requiring replacement of the entire forming unit and sealing mold when changing specifications, and inferior bag stability and aesthetics compared to thermoforming equipment.

[0005] ② Pre-made bag filling and sealing machine: This machine uses a robotic arm to pick up pre-made bags, open them, fill them, and seal them. It is mainly suitable for medium to large-sized bagged products. It has a clear structure and a high degree of automation, making it suitable for medium to large-sized bag packaging. Its disadvantages include reliance on pre-made bags, high packaging material costs, cumbersome specification changes, high inventory pressure, fixed equipment structure, limited compatibility with a limited number of bag types, difficulty in achieving multi-purpose functionality, and weak forming capacity, making it unable to create bag designs with differentiated appearances.

[0006] Chinese invention patent application CN113650863A discloses a fully servo-driven horizontal packaging machine, including a frame and, sequentially arranged on the frame, a film feeding device, a film splicing device, a bottom punching device, a servo film feeding device, a film forming device, a bottom sealing device, a vertical sealing device, a corner rounding device, an easy-tear opening device, a color mark detection device, a servo film pulling device, a first shearing device, a second shearing device, a bag opening device, a bag opening detection device, a feeding device, a bag spreading device, a top sealing device, and a servo bag conveying device. This machine achieves the process of turning a roll of film into a finished product, with one fully automatic machine completing the workflow of more than ten individual machines, significantly improving production efficiency. However, this equipment is only suitable for standard bag types and cannot be used for irregularly shaped bags. Furthermore, it uses a pre-cutting and then filling production method, which can only fill individual bags one by one. For some continuous bag types with small filling volumes, this severely restricts production efficiency. Therefore, further structural optimization is needed. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a horizontal plastic film thermoforming filling and sealing machine that can transform a roll of film into a finished product of irregularly shaped bags. The packaging process uses continuous bag filling, sealing and cutting, and can be cut into a single bag or multiple continuous bags as needed, making it more flexible to use.

[0008] The technical solution to achieve the purpose of this utility model is:

[0009] A horizontal plastic film thermoforming filling and sealing machine includes a frame and a film feeding and folding mechanism and a servo bag pulling mechanism mounted on the frame. The servo bag pulling mechanism has a color mark detection mechanism, a heating mechanism, a cavity forming mechanism, a servo filling mechanism, a top sealing mechanism, and a cutting mechanism mounted on the frame along its traction path. The cavity forming mechanism includes an air blowing assembly and a pair of openable rear-heated cavity molds and a front-heated cavity mold respectively located on both sides of the air blowing assembly, forming a forming cavity with an opening at the top. A roll of film printed with a bag pattern is formed into a folded plastic film after passing through the film feeding and folding mechanism. The plastic film is heated and formed by the heating mechanism and the cavity forming mechanism to form a continuous bag. After filling and sealing, it is cut into finished products by the cutting mechanism.

[0010] Furthermore, the film feeding and folding mechanism includes a film feeding mechanism located at the bottom of the frame, a film receiving mechanism and a film folding mechanism arranged sequentially along the film feeding path, and the film feeding mechanism includes a tensioning component and two sets of film feeding tensioning components sharing the tensioning component.

[0011] Furthermore, the film splicing mechanism includes a fixed plate fixed on the frame, a first pressure plate and a pair of parallel second pressure plates are provided on the fixed plate, and a roller is slidably provided between the two second pressure plates, the sliding direction of the roller is parallel to the second pressure plates.

[0012] Furthermore, the plastic film folding mechanism includes a folding guide assembly and a passive pressing assembly aligned in the horizontal direction; the folding guide assembly includes a first support fixed on the frame, a long shaft vertically fixed at the lower end of the first support, the axial length of the long shaft being half the axial length of the rolled film, and a roller rotatably mounted at the end of the long shaft, the outer circumferential surface of the roller being fitted with a pressure roller rotatably mounted on the first support; the passive pressing assembly includes a second support fixed on the frame, on which mutually parallel passive conveying rollers are rotatably mounted, and a pressing seam adapted to the folded plastic film is formed between the two passive conveying rollers.

[0013] Furthermore, the servo bag-pulling mechanism includes a servo module fixed on the frame and a crossbar driven by the servo module to reciprocate in the horizontal direction. The crossbar is fixed with a plurality of clamping parts that can be opened and closed.

[0014] Furthermore, the heating mechanism includes a fixed seat mounted on a frame, a third support seat that is adjustable in height on the fixed seat, an openable heating plate on the third support seat, and a first partition plate fixed on the third support seat between the two heating plates.

[0015] Furthermore, the cavity forming mechanism includes a fourth support base mounted on a frame. A drive motor is fixedly mounted on the top of the fourth support base, and a first guide shaft assembly is vertically provided on the side and slides through to the other side. The rear-heated cavity mold is slidably mounted on the first guide shaft assembly, and the front-heated cavity mold is fixedly mounted on the first guide shaft assembly. The output end of the drive motor is fixedly connected to a lead screw assembly that is vertically rotatably mounted on the bottom of the fourth support base. The moving end of the lead screw assembly is symmetrically hinged with connecting rods. The other ends of the two connecting rods are respectively hinged to a first connecting block and a second connecting block. The first connecting block is fixedly connected to the rear-heated cavity mold, and the second connecting block is fixedly connected to the first guide shaft assembly.

[0016] Furthermore, the servo filling mechanism is a straight-line multi-head servo filling machine.

[0017] Furthermore, the inlet of the cutting mechanism is provided with a bag guide. The cutting mechanism includes a fifth support fixed on the frame and a punching cutter, a clamping part and a slitting cutter provided on the fifth support and which can be opened and closed. The bag guide, punching cutter, clamping part and slitting cutter are aligned in the horizontal direction.

[0018] Furthermore, a tearing and cutting mechanism and a brush removal mechanism are sequentially provided between the color mark detection mechanism and the heating mechanism.

[0019] Furthermore, the top sealing mechanism is provided with a top sealing cold pressing and shaping mechanism on the rear side along the bag conveying direction.

[0020] Furthermore, a servo buffer mechanism is provided between the top sealing cold pressing and shaping mechanism and the cutting mechanism.

[0021] By adopting the above technical solution, this utility model has the following beneficial effects:

[0022] (1) This utility model changes the sealing method of the existing horizontal packaging machine. It adopts a combination of heating mechanism and cavity forming mechanism to realize the forming of various bag types, including irregular bags. The heating cavity mold is a detachable structure, which is convenient for product change. At the same time, it changes the traditional method of cutting before filling. The cutting mechanism is set after filling and sealing, so that the bag body is still continuous during filling, which lays the foundation for multi-head filling, improves the overall efficiency, and can be cut into a single bag or multiple continuous bag products according to needs, making it more flexible to use.

[0023] (2) This utility model uses a film feeding and folding mechanism with two sets of film feeding tensioning shafts and a film receiving mechanism to facilitate quick replacement when the roll of film is used up, thereby achieving continuous production and improving packaging efficiency.

[0024] (3) The servo bag-pulling mechanism of this utility model drives multiple clamping parts to achieve synchronous back and forth through a servo module, ensuring the accurate movement position of the bag-pulling at each workstation.

[0025] (4) The heating mechanism of this utility model sets the heating plate on the adjustable third support base, which facilitates installation and debugging, ensures that the plastic film is located in the center area of ​​the heating plate, and provides excellent heating effect.

[0026] (5) The cavity forming mechanism of this utility model drives the lead screw to rotate through the drive motor, thereby realizing the lifting of the moving end on it, and then drives the two heated cavity molds arranged opposite to each other to move closer and further away through the two connecting rods. The structure is simple and the positional accuracy is high.

[0027] (6) This utility model adopts a straight-line multi-head servo filling machine, which can fill multiple bags at one time, thereby improving filling efficiency.

[0028] (7) By setting a bag guide, this utility model enables the bag to enter the cutting section in the center, thereby further improving the cutting accuracy of the bag.

[0029] (8) By adding a tear-off cutting mechanism and a brush removal mechanism, this utility model forms an easy-tear opening on the bag body, making the bag opening design more diverse and combining both easy-tear opening and squeeze opening methods.

[0030] (9) By adding a top sealing cold pressing and shaping mechanism, the high temperature at the sealing position is subjected to cold pressing, and the temperature drops instantly, ensuring that the product shape is more beautiful and the sealing is more secure and does not leak.

[0031] (10) By setting up a servo cache mechanism, this utility model can greatly improve the production capacity of the equipment and does not require a longer equipment space to pre-store these uncut products. Attached Figure Description

[0032] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0033] Figure 1 This is a perspective view of the present utility model;

[0034] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0035] Figure 3 This is a front view of the film-folding mechanism of this utility model;

[0036] Figure 4 This is a side view of the film-folding mechanism of this utility model;

[0037] Figure 5 This is a schematic diagram of the membrane bonding mechanism of this utility model;

[0038] Figure 6 This is a schematic diagram of the servo-driven bag-pulling mechanism of this utility model;

[0039] Figure 7 This is a schematic diagram of the structure of the color mark detection mechanism of this utility model;

[0040] Figure 8 This is a side view of the tearing and cutting mechanism of this utility model;

[0041] Figure 9 This is a top view of the tearing and cutting mechanism of this utility model;

[0042] Figure 10 This is a schematic diagram of the heating mechanism of this utility model;

[0043] Figure 11 This is a schematic diagram of the cavity forming mechanism of this utility model;

[0044] Figure 12 This is a schematic diagram of the servo buffer mechanism of this utility model;

[0045] Figure 13 This is a schematic diagram of the cutting mechanism of this utility model;

[0046] Figure 14 This is a partial structural schematic diagram of the cutting mechanism of this utility model.

[0047] The labels in the attached diagram are:

[0048] Rack 1;

[0049] Film folding mechanism 2, film feeding mechanism 2-1, support shaft 2-1-1, support plate 2-1-2, tension wheel 2-1-3, film feeding motor 2-1-4, tensioning shaft 2-1-5, film receiving mechanism 2-2, fixing plate 2-2-1, first pressure plate 2-2-2, second pressure plate 2-2-3, second guide shaft assembly 2-2-4, lifting cylinder 2-2-5, control valve group 2-2-6, roller 2-2-7, plastic film folding mechanism 2-3, first support seat 2-3-1, long shaft 2-3-2, roller 2-3-3, pressure wheel 2-3-4, second support seat 2-3-5, passive conveying roller 2-3-6;

[0050] Servo bag-pulling mechanism 3, servo module 3-1, crossbar 3-2, clamping part 3-3, connecting plate 3-4;

[0051] Color mark detection mechanism 4, photoelectric support 4-1, color mark detection photoelectric device 4-2, guide seat 4-3;

[0052] 5. Tear-cutting mechanism, 5-1. Adjustment bracket, 5-2. Blade fixing seat, 5-3. Second partition, 5-4. Tear-cutting blade;

[0053] 6. Brush removal mechanism 6-1, brush holder 6-2, chip removal brush 6-2

[0054] Heating mechanism 7, fixed seat 7-1, third support seat 7-2, handwheel lifting and adjusting mechanism 7-3, cylinder drive mechanism 7-4, front push plate 7-5, rear push plate 7-6, heating plate 7-7;

[0055] Cavity forming mechanism 8, air blowing assembly 8-1, rear heated cavity mold 8-2, front heated cavity mold 8-3, fourth support base 8-4, drive motor 8-5, first guide shaft assembly 8-6, lead screw assembly 8-7, connecting rod 8-8, first connecting block 8-9, second connecting block 8-10;

[0056] Servo filling mechanism 9;

[0057] Top sealing mechanism 10;

[0058] Top sealing cold pressing and shaping mechanism 11;

[0059] Servo buffer mechanism 12, base plate 12-1, buffer motor 12-2, drive wheel 12-3, first passive wheel 12-4, second passive wheel 12-5, guide track 12-6;

[0060] Cutting mechanism 13, fifth support seat 13-1, punching cutter 13-2, clamping part 13-3, splitting cutter 13-4, bag guide part 13-5. Detailed Implementation

[0061] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0062] (Example 1)

[0063] like Figures 1 to 14 The horizontal plastic film thermoforming filling and sealing machine shown includes a frame 1 and a film feeding and folding mechanism 2 and a servo bag pulling mechanism 3 mounted on the frame 1. The traction path of the servo bag pulling mechanism 3 is provided with a color mark detection mechanism 4, a tearing and cutting mechanism 5, a brush removal mechanism 6, a heating mechanism 7, a cavity forming mechanism 8, a servo filling mechanism 9, a top sealing mechanism 10, a top sealing cold pressing and shaping mechanism 11, a servo buffer mechanism 12, and a cutting mechanism 13. The roll film printed with the bag pattern is folded into a plastic film after passing through the film feeding and folding mechanism 2. The plastic film is then folded into an easy-tear opening by the tear-off and cutting mechanism 5. The plastic film debris cut off by the tear-off and cutting mechanism 5 is removed by the brush removal mechanism 6. Subsequently, the plastic film passes through the heating mechanism 7 and the cavity forming mechanism 8 in sequence. After being heated and formed, the folded plastic film forms a continuous bag. After being filled and sealed by the servo filling mechanism 9 and the top sealing mechanism 10 in sequence, the top sealing is shaped by the top sealing cold pressing and shaping mechanism 11. After being buffered by the servo buffer mechanism 12, the cutting mechanism 13 cuts it into a single bag or a continuous bag according to the settings.

[0064] Specifically, the film feeding and folding mechanism 2 includes a film feeding mechanism 2-1 located at the lower part of the frame 1, and a film receiving mechanism 2-2 and a plastic film folding mechanism 2-3 arranged sequentially along the plastic film feeding path.

[0065] The film-laying mechanism 2-1 includes one tensioning assembly and two film-laying tensioning assemblies. The tensioning assembly includes a pair of vertically arranged support shafts 2-1-1 fixed to the frame 1 and a row of tensioning rollers 2-1-3 located above the support shafts 2-1-1. A support plate 2-1-2 is slidably connected between the two support shafts 2-1-1. A row of tensioning rollers 2-1-3 is also vertically rotatably mounted on the support plate 2-1-2. Photoelectric sensors fixed to the frame 1 are located on the upper and lower sides. The film-laying tensioning assembly consists of a film-laying motor 2-1-4 and a tensioning shaft 2-1-5 driven by the film-laying motor 2-1-4. The two film-laying tensioning assemblies share one tensioning assembly, allowing two rolls of film to be fixed simultaneously.

[0066] The film-attaching mechanism 2-2 includes a fixed plate 2-2-1 fixed on the frame 1. The top of the fixed plate 2-2-1 is provided with a first pressure plate 2-2-2, a pair of parallel second pressure plates 2-2-3, and a second guide shaft assembly 2-2-4. The bottom is provided with three sets of lifting cylinders 2-2-5 connected to the pressure plates respectively. The side is provided with a control valve assembly 2-2-6 for controlling the action of the lifting cylinders 2-2-5, so that the three sets of pressure plates can be lifted and lowered on the fixed plate 2-2-1. A roller cutter 2-2-7 is slidably provided between the two second pressure plates 2-2-3 through the second guide shaft assembly 2-2-4. The sliding direction of the roller cutter 2-2-7 is parallel to that of the second pressure plates 2-2-3 and is used to cut the plastic film.

[0067] The plastic film folding mechanism 2-3 includes a folding guide assembly and a passive pressing assembly aligned horizontally. The folding guide assembly includes a first support 2-3-1 fixedly mounted on the frame 1. A long shaft 2-3-2 is vertically fixedly mounted at the lower end of the first support 2-3-1. The axial length of the long shaft 2-3-2 is half the axial length of the rolled film, and a roller 2-3-3 is rotatably mounted at its end. A pressure roller 2-3-4 rotatably mounted on the first support 2-3-1 is fitted onto the outer circumference of the roller 2-3-3. The passive pressing assembly includes a second support 2-3-5 fixedly mounted on the frame 1. Parallel passive conveying rollers 2-3-6 are rotatably mounted on the second support 2-3-5, and a pressing seam is formed between the two passive conveying rollers 2-3-6 to fit the folded plastic film.

[0068] At the beginning of production, the paper tube of the plastic film roll is inserted into the tensioning shaft, thus fixing the paper tube in place. The plastic film is then pulled out and passes through the tensioning assembly 2-1-1. As the plastic film is continuously pulled by the subsequent process, it causes the support plate 2-1-2 to move up and down, thus contacting the upper photoelectric sensor. The external control system receives the instruction and instructs the film feeding motor 2-1-4 to drive the tensioning shaft to rotate in the film feeding direction, which is the film feeding action. When the support plate 2-1-2 contacts the lower photoelectric sensor, it indicates that the plastic film is loosened, and the control system receives the instruction and instructs the film feeding motor 2-1-4 to stop immediately. This cycle is repeated to control whether the film feeding motor 2-1-4 performs film feeding or stops, thus achieving tensioning. The plastic film is pressed by the pressure roller 2-3-4 onto the roller 2-3-3 to form a folding tendency, and then passes through the pressing seam, realizing the folding and shaping of the plastic film. As production continues, when the roll material is used up, the film unwinding tensioning assembly stops rotating and retracts, the roll material is removed, and the roll material from another set of film unwinding tensioning assemblies is used to replace it. The film is then spliced ​​using the film splicing mechanism 2-2, and the equipment can start a new round of production.

[0069] During production, the lifting cylinder 2-2-5 of the film splicing mechanism 2-2 is always in the open state. There is a large gap between the pressure plate and the fixed plate 2-2-1, through which the plastic film can pass smoothly. When the roll material is almost used up, the equipment issues a warning and stops. The operator presses the control valve group, and the lifting cylinder 2-2-5 performs a retraction action, which drives the three sets of pressure plates on the plate to press down simultaneously, pressing the plastic material still. The operator manually moves the roller 2-2-7 to cut a neat oblique section of the plastic film. The plastic film separates from this point. The operator manually presses the control valve group, and the left and middle sets of pressure plates open. The remaining roll material connected to the paper roll on the tensioning shaft is in a loose and free state, and the old roll material can be removed. Manually pull the first end of the new roll of film and guide it to the splicing mechanism. Pass it through the left and middle pressure plates, then press the control valve assembly again. The left and middle pressure plates will press down, fixing the roll in place. Manually pull the roller 2-2-7 to cut a neat beveled end face on the new roll. After this, the cut edges of the old and new rolls will match. Use tape to secure the end connection, thus completing the splicing process. This eliminates the need for complete equipment adjustments from start to finish each time when changing rolls; once this splicing mechanism completes the splicing action, roll replacement can be achieved, and production can be quickly restarted.

[0070] During breaks in equipment operation, workers can remove the previously used roll material and, following the same procedure, replace it with a new roll material onto the tensioning shaft.

[0071] The servo bag-pulling mechanism 3 includes a servo module 3-1 fixed on the frame 1 and a crossbar 3-2 driven by the servo module 3-1 to reciprocate horizontally. Multiple openable and closable clamping parts 3-3 are fixed on the crossbar 3-2. One servo module 3-1 can drive multiple clamping parts 3-3 to achieve synchronous reciprocating motion, ensuring precise bag-pulling position at each workstation. Specifically, a connecting plate 3-4 is fixed to the moving end of the servo module 3-1. The crossbar 3-2 is fixed to the top of the connecting plate 3-4 and is horizontally positioned. Five sets of clamping parts 3-3 are provided, three of which are located to the right of the color mark detection mechanism 4, the cavity forming mechanism 8, and the servo filling mechanism 9, respectively. Two sets are located at the top sealing mechanism 10 and the top sealing cold pressing and shaping mechanism 11, respectively. These sets employ a structure using cylinders and driven grippers, which will not be described in detail here.

[0072] The color mark detection mechanism 4 includes a photoelectric support 4-1, a color mark detection photoelectric sensor 4-2, and a guide seat 4-3. It is a conventional design, and its working principle is briefly described here. The photoelectric support 4-1 is fixed to the frame 1. The color mark detection photoelectric sensor 4-2 is locked to the adjusting screw of the photoelectric support 4-1. The adjusting screw of the photoelectric support 4-1 can adjust the horizontal movement of the color mark detection photoelectric sensor 4-2. When the folded plastic film roll passes through the above mechanism, the bottom of the plastic film roll passes through the guide seat 4-3 and is guided by the guide groove of the guide seat 4-3. The upper part of the plastic film roll passes through the clamping plate of the color mark photoelectric sensor support 4-1. When the plastic film moves horizontally, the color mark on the plastic film is detected by the color mark detection photoelectric sensor, thereby locating the moving distance of the plastic film and ensuring the accuracy of this moving distance.

[0073] The tear-off cutting mechanism 5 includes an adjusting bracket 5-1, a blade holder 5-2, a second partition 5-3, and tear blades 5-4. The blade holders 5-2 are provided in pairs and mounted on adjusting blocks of the adjusting bracket 5-1 to achieve height adjustment, allowing for adaptive adjustment according to the size of the roll material. Similarly, the tear blades 5-4 are provided in pairs and mounted on the two blade holders 5-2 respectively. The second partition 5-3 is fixed between the two tear blades 5-4. The plastic film roll passes through this mechanism, with the bottom of the roll passing through the blade holder 5-2. With the second partition 5-3 as the boundary, both sides of the tear blades 5-4 contact the plastic film body. When the plastic film is pulled horizontally, a horizontal easy-tear slit is formed. This slit can serve as the tear opening for the finished bag after filling and sealing, making it easy to tear open the packaging seal and use the material inside during actual use.

[0074] The brush removal mechanism 6 includes a pair of brush holders 6-1 fixed on the crossbars 3-3 of the servo bag pulling mechanism 3. Each brush holder 6-1 is equipped with a dredging brush 6-2. In use, the brush holders 6-1 reciprocate with the servo bag pulling mechanism 3, thereby scraping away the burrs and debris generated by the tearing and cutting mechanism 5 in the previous process, preventing the burrs and debris from affecting the work of the next process.

[0075] The heating mechanism 7 includes a fixed base 7-1, a third support base 7-2, a handwheel lifting adjustment mechanism 7-3, a cylinder drive mechanism 7-4, a front push plate 7-5, a rear push plate 7-6, and a pair of heating plates 7-7. The fixed base 7-1 is mounted on the frame 1. The third support base 7-2 is adjustablely mounted on the fixed base 7-1 via the handwheel lifting adjustment mechanism 7-3. The cylinder drive mechanism 7-4 is fixedly mounted on the third support base 7-2. One piston rod is fixedly connected to the rear push plate 7-6, and the other piston rod is fixedly connected to the front push plate 7-5 via a guide rod. The two heating plates 7-7 are fixedly mounted on the two push plates respectively, opening and closing to heat the passing plastic film. To prevent the folded plastic film from sticking together after heating, a first partition 7-8 fixedly mounted on the third support base 7-2 is provided between the two heating plates 7-7. When in use, the plastic film is pulled to this station. The front and rear heating plates are initially in the open state, and the plastic film can pass through the space between the front and rear heating plates. In the actual production process, the cylinder drive mechanism 7-4 receives the equipment control command and drives the heating plates to move closer and press against each other, thereby clamping the plastic film body for preheating, so that the plastic film body has a certain temperature and the film body becomes soft and can be shaped in the next process.

[0076] The cavity forming mechanism 8 includes an air blowing assembly 8-1 and a pair of openable rear-heated cavity molds 8-2 and a front-heated cavity mold 8-3 respectively located on both sides of the air blowing assembly 8-1, forming a forming cavity with an opening at the top, thereby shaping the heated mold body. Specifically, the cavity forming mechanism 8 also includes a fourth support base 8-4 mounted on the frame 1. A drive motor 8-5 is fixedly mounted on the top of the fourth support base 8-4, and a first guide shaft assembly 8-6 is vertically mounted on the side and slides through to the other side. The rear-heated cavity mold 8-2 is slidably mounted on the first guide shaft assembly 8-6, and the front-heated cavity mold 8-3 is fixedly mounted on the first guide shaft assembly 8-6. The output end of the drive motor 8-5 is fixedly connected to a lead screw assembly 8-7 that is vertically rotatably mounted at the bottom of the fourth support base 8-4. The moving end of the lead screw assembly 8-7 is symmetrically hinged to connecting rods 8-8. The other ends of the two connecting rods 8-8 are respectively hinged to a first connecting block 8-9 and a second connecting block 8-10. The first connecting block 8-9 is fixedly connected to the rear-heated cavity mold 8-2, and the second connecting block 8-10 is fixedly connected to the first guide shaft assembly 8-6. The softened plastic film is brought to this station. Initially, the heating cavity mold is open, allowing the film to pass through the space between the front and rear heating cavities. During production, the drive motor 8-5 receives equipment control commands, causing the connecting rod 8-8 to swing, resulting in the front and rear heating cavities pressing against each other until they adhere to the air blowing assembly 8-1, forming a molding cavity. At this time, the air blowing assembly 8-1 blows gas into the molding cavity, while the front and rear heating cavities clamp the film body for further heating. Under the influence of the blowing, the film expands within the cavity, shaping it into a pre-designed form. This pre-designed form is determined by the shape of the cavity mold and has a certain volume, allowing liquid materials to be poured in.

[0077] The servo filling mechanism 9 is a straight-flow multi-head servo filling machine, capable of filling multiple bags at once, improving filling efficiency. After filling, the bag is pulled to the sealing station, where the top sealing mechanism 10 seals it. By controlling the temperature of the sealing mold, the bag can be squeezed open from the sealing point. After sealing, the bag is further pulled to the top sealing cold pressing and shaping mechanism 11, where the high temperature at the sealing position is cooled and pressed down instantly, resulting in a more aesthetically pleasing product shape and a more secure seal that prevents leakage. The structures of the top sealing mechanism 10 and the top sealing cold pressing and shaping mechanism 11 are similar to those of the cavity forming mechanism 8. The sealing block of the top sealing mechanism 10 and the cold pressing block of the top sealing cold pressing and shaping mechanism 11 are designed according to the shape of the bag opening, a common practice in existing technologies, and will not be elaborated here.

[0078] After sealing and cold pressing, the bag body is conveyed by the servo buffer mechanism 12 and then enters the cutting mechanism 13. The servo buffer mechanism 12 includes a base plate 12-1, a buffer motor 12-2, a drive wheel 12-3, a first passive wheel 12-4, a second passive wheel 12-5, and a guide track 12-6. The buffer motor 12-2 is fixedly mounted on the bottom of the base plate 12-1 and connected to the drive wheel 12-3 to drive it to rotate. The first passive wheel 12-4 and the second passive wheel 12-5 are rotatably mounted on the base plate 12-1. Interconnected plastic film-formed products are introduced from guide track 12-6, pass through two passive wheels, and are introduced into drive wheel. The drive wheel has a cavity with the same shape as the product. The product is inserted into the cavity. Driven by buffer motor 12-2, the drive wheel rotates continuously, driving the plastic film-formed products to be output to the next mechanism in a continuous and coherent manner. In this process, due to the reasonable distribution and layout of the passive and drive wheels, this part of the product traction can play a buffering role, which can greatly improve the production capacity and speed of the equipment, and does not require a longer equipment space to pre-store these uncut products.

[0079] The cutting mechanism 13 includes a fifth support base 13-1 fixed on the frame 1, and a punching cutter 13-2, a clamping part 13-3, and a slitting cutter 13-4 that are provided on the fifth support base 13-1 and can be opened and closed. The punching cutter 13-2 and the clamping part 13-3 share a set of drive structures to achieve synchronous opening and closing. The drive structure adopts a structure similar to that of the cavity forming mechanism 8, which will not be described in detail here. The slitting cutter 13-4 adopts a structure in which a pair of cutters move independently driven by a cylinder. A bag guide part 13-5 is provided at the entrance of the cutting mechanism 13. The bag guide part 13-5, the punching cutter 13-2, the clamping part 13-3, and the slitting cutter 13-4 are aligned in the horizontal direction. The plastic film forming product is pulled to this station. The drive wheel of the servo buffer mechanism 12 drives the plastic film forming body according to the program. According to the program setting, it can move one at a time or multiple at a time. With the cooperation of the punching cutter 13-2, the clamping part 13-3 and the splitting cutter 13-4, it cuts one individual bag or one multi-pack at a time.

[0080] This invention changes the sealing method of existing horizontal packaging machines by combining a heating mechanism and a cavity forming mechanism to form various bag types, including irregularly shaped bags. The heating cavity mold is detachable for easy product changeover. It also changes the traditional method of cutting before filling by placing the cutting mechanism after filling and sealing, so that the bag remains continuous during filling, laying the foundation for multi-head filling, improving overall efficiency, and can be cut into single bag products or multiple continuous bag products as needed, making it more flexible to use.

[0081] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A horizontal form, film, thermoform, fill and seal machine characterized by: The device includes a frame and a film feeding and folding mechanism and a servo bag pulling mechanism mounted on the frame. The servo bag pulling mechanism has a color mark detection mechanism, a heating mechanism, a cavity forming mechanism, a servo filling mechanism, a top sealing mechanism, and a cutting mechanism mounted on the frame in sequence along its traction path. The cavity forming mechanism includes an air blowing assembly and a pair of openable rear-heated cavity molds and a front-heated cavity mold respectively located on both sides of the air blowing assembly, forming a forming cavity with an opening at the top. The roll film printed with the bag pattern is formed into a folded plastic film after passing through the film feeding and folding mechanism. The plastic film is heated and formed by the heating mechanism and the cavity forming mechanism in sequence to form a continuous bag. After filling and sealing, it is cut into finished products by the cutting mechanism.

2. A horizontal form, thermoform, fill and seal machine as claimed in claim 1, characterised in that: The film feeding and folding mechanism includes a film feeding mechanism located at the bottom of the frame, a film receiving mechanism and a film folding mechanism arranged sequentially along the film feeding path, and the film feeding mechanism includes a tensioning component and two sets of film feeding tensioning components sharing the tensioning component.

3. A horizontal form, thermo film, fill and seal machine as claimed in claim 1, wherein: The servo-driven bag-pulling mechanism includes a servo module fixed on the frame and a crossbar driven by the servo module to reciprocate in the horizontal direction. The crossbar is fixed with a plurality of clamping parts that can be opened and closed.

4. The horizontal plastic film thermoforming filling and sealing machine according to claim 1, characterized in that: The heating mechanism includes a fixed base mounted on a frame, a third support base that is adjustable in height on the fixed base, an openable heating plate on the third support base, and a first partition plate fixed on the third support base between the two heating plates.

5. A horizontal form, thermo film, fill and seal machine as claimed in claim 1, wherein: The cavity forming mechanism includes a fourth support base mounted on a frame. A drive motor is fixedly mounted on the top of the fourth support base, and a first guide shaft assembly is vertically provided on the side and slides through to the other side. The rear-heated cavity mold is slidably mounted on the first guide shaft assembly, and the front-heated cavity mold is fixedly mounted on the first guide shaft assembly. The output end of the drive motor is fixedly connected to a lead screw assembly that is vertically rotatably mounted on the bottom of the fourth support base. The moving end of the lead screw assembly is symmetrically hinged with connecting rods. The other ends of the two connecting rods are respectively hinged to a first connecting block and a second connecting block. The first connecting block is fixedly connected to the rear-heated cavity mold, and the second connecting block is fixedly connected to the first guide shaft assembly.

6. A horizontal form, thermo film, fill and seal machine as claimed in claim 1, wherein: The servo filling mechanism is a straight-line multi-head servo filling machine.

7. A horizontal form, thermo film, fill and seal machine as claimed in claim 1, wherein: The cutter mechanism has a bag guide at its entrance. The cutter mechanism includes a fifth support fixed on the frame and a punching cutter, a clamping part, and a slitting cutter that are mounted on the fifth support and can be opened and closed. The bag guide, punching cutter, clamping part, and slitting cutter are aligned in the horizontal direction.

8. A horizontal form, film and thermo form, fill and seal machine according to any one of claims 1 to 7, characterized in that: A tearing and cutting mechanism and a brush removal mechanism are sequentially provided between the color mark detection mechanism and the heating mechanism.

9. A horizontal form, film and thermo form, fill and seal machine according to any one of claims 1 to 7, characterized in that: The top sealing mechanism is equipped with a top sealing cold pressing and shaping mechanism on the rear side along the bag conveying direction.

10. A horizontal form, thermo film, fill and seal machine according to claim 9, wherein: A servo buffer mechanism is provided between the top sealing cold pressing and shaping mechanism and the cutting mechanism.

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