A heat shrink packaging machine and a packaging method thereof

Abstract

The application provides a heat shrinkage packaging machine and a packaging method thereof, the heat shrinkage packaging machine comprises a rack main body, the rack main body is sequentially provided with a feeding conveying device, a middle sealing device, a transverse sealing device and a discharging conveying device from left to right, a film supporting device and a film running device are arranged below the feeding end of the middle sealing device, a waste recycling turntable is further arranged on the middle sealing device, and the middle sealing device, the film running device and the discharging conveying device share a set of transmission devices. The middle sealing device, the film running device and the discharging conveying device share a set of transmission devices, and the transmission device only needs to be driven by one transmission driving motor, so that the use of the driving motor is reduced, the manufacturing cost is reduced, meanwhile, the steps of the transmission mechanisms are consistent, and the cooperation of the devices is smoother.

Description

Technical Field

[0001] This invention relates to the field of heat shrink packaging, and in particular to a heat shrink packaging machine and its packaging method. Background Technology

[0002] A heat shrink packaging machine is an automated device that uses heat to uniformly shrink and tightly adhere the heat shrink film surrounding a product, achieving a sealed, moisture-proof, impact-resistant, and aesthetically pleasing package. Heat shrink packaging machines include a center sealing device and a horizontal sealing device for sealing the packaging bags. For thicker packaging bags, a longer horizontal sealing time is required. However, typical horizontal sealing devices operate at fixed points, leading to pauses if the sealing time is too long. The center sealing process, on the other hand, does not require interruptions. This can result in a lack of smooth coordination between the center sealing and horizontal sealing operations, reducing production efficiency.

[0003] As society develops, the demand for product output is constantly increasing, and packaging products are becoming more and more diversified. However, traditional center-sealing and horizontal-sealing devices have fixed sealing positions and can generally only package smaller products, failing to package multiple sizes and models, resulting in low compatibility. In addition, for large packaging machines, the transmission components have long spans, requiring each transmission component to be equipped with a drive motor, which greatly increases manufacturing costs. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide a heat shrink packaging machine, which aims to solve the problems of low packaging efficiency and poor compatibility of traditional packaging machines.

[0005] Another object of the present invention is to provide a packaging method.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A heat shrink packaging machine includes a frame body. From left to right, the frame body is provided with a feeding conveyor, a center sealing device, a horizontal sealing device, and a discharge conveyor. Below the feeding end of the center sealing device, there is a film supporting device and a film feeding device. The center sealing device is also provided with a waste recycling turntable. The center sealing device, the film feeding device, and the discharge conveyor share a common transmission device.

[0008] Furthermore, the transmission device includes a transmission drive motor, a transmission synchronous pulley set, a main transmission sprocket, a first discharge transmission sprocket, a second discharge transmission sprocket, a first film-feeding transmission sprocket, a second film-feeding transmission sprocket, a third film-feeding transmission sprocket, a first center-sealing transmission sprocket, a second center-sealing transmission sprocket, a third center-sealing transmission sprocket, a center-sealing conveyor belt transmission sprocket, a first waste material turntable transmission sprocket, a second waste material turntable transmission sprocket, and a film tensioning wheel set;

[0009] The drive motor is fixedly mounted on the base plate of the frame body. The drive synchronous pulley group includes a driving synchronous pulley and a driven synchronous pulley. The driving synchronous pulley and the driven synchronous pulley are driven by a synchronous belt. The driving synchronous pulley is fixedly mounted on the output shaft of the drive motor. The main drive sprocket, the first discharge drive sprocket and the driven synchronous pulley are coaxially arranged and fixedly mounted on the base plate. The second discharge drive sprocket is fixedly mounted on one end of the discharge drive shaft of the discharge conveying device. The second discharge drive sprocket is driven by the first and second discharge drive sprockets through the discharge drive chain.

[0010] A transmission mounting plate is provided on one side of the sealing device. The first film-feeding transmission sprocket is mounted on the transmission mounting plate. The second film-feeding transmission sprocket is coaxially arranged with the first film-feeding transmission sprocket. The third film-feeding transmission sprocket is fixedly mounted on one end of the film-feeding drive shaft of the film-feeding device. The second transmission sprocket and the third film-feeding transmission sprocket are driven by a film-feeding transmission chain.

[0011] The first intermediate sealing drive sprocket is mounted on the transmission mounting plate. A first bearing slide rod is provided between the first and second intermediate sealing drive sprockets, and a second bearing slide rod is provided between the second and third intermediate sealing drive sprockets. The third intermediate sealing drive sprocket is mounted on one end of the sealing film drive main shaft of the intermediate sealing device. A pulley is provided on one side of the first and second intermediate sealing drive sprockets. The first and second intermediate sealing drive sprockets are driven by a belt, and the second and third intermediate sealing drive sprockets are driven by an intermediate sealing drive chain.

[0012] The drive sprocket of the sealing conveyor belt is installed at one end of the drive shaft of the sealing conveyor belt of the sealing device. The first waste turntable drive sprocket is coaxially arranged with the sealing conveyor belt drive sprocket. The second waste turntable drive sprocket is installed on the frame body. The film tensioning wheel group includes a first film roll wheel and a second film roll wheel. The first film roll wheel is coaxially arranged with the second waste turntable drive sprocket. The second film roll wheel is installed on the rotating shaft of the waste recycling turntable. The first waste turntable drive sprocket and the second waste turntable drive sprocket are driven by a turntable drive chain. The first film roll wheel and the second film roll wheel are driven by a film roll belt.

[0013] The main drive sprocket is driven by the main drive chain, the first film-carrying drive sprocket, the first center-sealing drive sprocket, and the center-sealing conveyor belt drive sprocket.

[0014] Furthermore, the transmission device also includes a first transition sprocket set and a second transition sprocket set, wherein the first transition sprocket set meshes with the discharge transmission chain, and the second transition sprocket set meshes with the main transmission chain.

[0015] Furthermore, the intermediate sealing device includes an intermediate sealing conveyor and an intermediate sealing film device. The intermediate sealing film device is positioned above the intermediate sealing conveyor and mounted on the main frame via a mounting bracket. The mounting bracket is also equipped with a lifting device for adjusting the height of the intermediate sealing film device. The horizontal sealing device includes a lifting platform and a horizontal pushing device and a horizontal sealing film device mounted on the lifting platform. The horizontal pushing device is connected to the horizontal sealing film device. An intermediate sealing opening and closing device is provided at one end of the intermediate sealing conveyor near the horizontal sealing device. The discharge conveyor is located near the horizontal sealing device. One end is equipped with a discharge opening and closing device. Both sides of one end of the middle sealing opening and closing device and the discharge opening and closing device are equipped with horizontal guide rails. The middle sealing opening and closing device slides with the middle sealing conveyor through the horizontal guide rails. The discharge opening and closing device slides with the discharge conveyor through the horizontal guide rails. The horizontal sealing film device is connected to the middle sealing opening and closing device and the discharge opening and closing device through a pull plate. When the horizontal pushing device drives the horizontal sealing film device to perform horizontal reciprocating motion, the middle sealing opening and closing device and the discharge opening and closing device move synchronously under the drive of the pull plate.

[0016] Furthermore, the lifting device includes a lifting drive motor, a lifting adjustment screw, and a transverse guide rail. The lifting drive motor is fixedly mounted on the mounting plate on the top of the mounting frame. One end of the lifting adjustment screw is fixedly engaged with the output shaft of the lifting drive motor, and the other end is threadedly engaged with the transverse guide rail. Both ends of the transverse guide rail are vertically slidably engaged with the mounting frame through guide plates. The middle sealing film device is slidably engaged with the transverse guide rail through a transverse sliding plate.

[0017] Furthermore, the sealing device includes a first guide film wheel assembly, a second guide film wheel assembly, a hot cutting blade, and the sealing drive spindle. The first guide film wheel assembly includes a first sealing drive wheel and a first sealing driven wheel. The second guide film wheel assembly includes a second sealing drive wheel and a second sealing driven wheel. An upper guide film belt and a lower guide film belt are provided between the first sealing drive wheel and the first sealing driven wheel, and between the second sealing drive wheel and the second sealing driven wheel. A first transmission gear and a first transmission sprocket are coaxially arranged on the first sealing drive wheel. A second transmission gear is coaxially arranged on the second sealing drive wheel. The first transmission gear and the second transmission gear mesh and drive each other. The other end of the sealing drive spindle is chain-driven with the first transmission sprocket. The upper and lower guide film belts of the first guide film wheel assembly and the upper and lower guide film belts of the second guide film wheel assembly are in contact with each other to form a guide film path. The hot cutting blade passes laterally through the guide film path through the gap between the upper and lower guide film belts.

[0018] Furthermore, the horizontal sealing device includes an upper horizontal sealing knife, a lower horizontal sealing knife, a knife holder guide rod, and an upper and lower sealing knife driving device. The upper horizontal sealing knife is fixedly mounted on the upper end of the knife holder guide rod via an upper knife holder, and the lower horizontal sealing knife slides in cooperation with the knife holder guide rod via a lower knife holder. The upper and lower sealing knife driving device is used to control the opening and closing of the upper and lower horizontal sealing knives.

[0019] Furthermore, the lifting platform includes an inverted U-shaped fixed plate, a horizontal sealing height adjusting seat, a horizontal sealing height adjusting screw, a horizontal sealing lifting plate, and a horizontal sealing lifting drive device. The inverted U-shaped fixed plate is fixedly installed on the frame base, and the horizontal sealing height adjusting seat is fixedly installed on the upper end of the inverted U-shaped fixed plate. One end of the horizontal sealing height adjusting screw is threadedly engaged with the horizontal sealing height adjusting seat, and the other end is rotatably engaged with the horizontal sealing lifting plate through a rotating bearing. A set of horizontal guide rods is provided on the horizontal sealing lifting plate, and the horizontal sealing film sealing device is slidably engaged with the horizontal guide rods through a horizontal pushing plate. A lifting plate height adjusting sprocket is fixedly installed on the horizontal sealing height adjusting screw, and the horizontal sealing lifting drive device is transmitted to the horizontal sealing height adjusting screw through a chain.

[0020] Furthermore, the sealing conveyor includes a bag-forming component, a main conveyor belt, and auxiliary conveyor belts disposed on both sides of the main conveyor belt, with the bag-forming component disposed at the starting end of the main conveyor belt.

[0021] Another objective of the present invention is achieved through the following technical solution: S1, adjusting the height dimensions of the center sealing film device and the horizontal sealing film device according to the size of the product to be packaged;

[0022] S2. The packaging film placed on the film support device enters the bag forming component through the film feeding device for initial bag forming. At the same time, the product to be packaged is conveyed to the bag forming component through the feeding conveyor and wrapped by the packaging film, and continues to move forward under the action of the center sealing conveyor.

[0023] S3. The packaging film is pulled into the sealing device by the traction wheel set after the area to be sealed.

[0024] S4, Center sealing operation: The first and second guide film roller groups guide and transport the packaging film. When the packaging film passes through the hot cutter, it will be cut into upper and lower parts. The upper part is led out by the upper guide film belt and transported to the waste recycling turntable for recycling. The lower part is first passed through the lower surface of the hot cutter for center sealing under the traction of the lower guide film belt, and then transported to the horizontal sealing device for horizontal sealing operation.

[0025] S5. Horizontal sealing operation: The upper and lower sealing knife driving device controls the upper and lower horizontal sealing knives to close and separate. While the upper and lower horizontal sealing knives are closing, the horizontal pushing device drives the horizontal sealing film device, the middle sealing opening and closing device and the material discharge opening and closing device to move horizontally as a whole. During this process, the packaging bag is moving relative to the entire production line, but it remains relatively stationary with respect to the upper and lower horizontal sealing knives, thereby increasing the sealing time and eliminating the need for periodic pauses.

[0026] S6. After being horizontally sealed by the horizontal sealing device, the packaged products enter the discharge conveyor to complete the discharge.

[0027] In summary, the beneficial effects of the present invention are as follows:

[0028] 1. The sealing device, film feeding device and material discharge conveying device of the present invention share a set of transmission devices, and the transmission device only needs one drive motor to drive it, which reduces the use of drive motors, reduces manufacturing costs, and ensures that the pace of each transmission mechanism is consistent, making the cooperation of each device smoother.

[0029] 2. The first and second guide film roller groups of the sealing device described in this invention provide full-process traction for the packaging film during the sealing process, ensuring that the packaging film will not fall off during the sealing process, thereby making the film feeding and sealing process of the sealing device more stable. Furthermore, the first and second guide film roller groups, in conjunction with the hot cutting blade, can simultaneously seal the packaging film and cut off excess packaging film, ensuring the flatness of the sealed area and improving processing efficiency. The cut-off excess packaging film is then conveyed to the waste recycling turntable via the upper guide film belt for recycling.

[0030] 3. The mounting frame of the present invention is provided with a lifting device for adjusting the height of the middle sealing film device. At the same time, the overall horizontal height of the horizontal sealing film device can be adjusted by the lifting platform, so that the sealing device can be adapted to packaging products of different heights and sizes, thereby improving the compatibility of the sealing device of the present invention.

[0031] 4. This invention changes the traditional top-feeding film device to a bottom-feeding film device. At the same time, the center-sealing conveyor device includes a main conveyor belt and auxiliary conveyor belts set on both sides of the main conveyor belt, which improves the load-bearing capacity of the center-sealing conveyor device, enabling the packaging machine to adapt to heavier and larger products and improving the versatility of the packaging machine. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the heat shrink packaging machine described in this invention;

[0033] Figure 2 This is a front view of the transmission device described in this invention;

[0034] Figure 3 This is a three-dimensional structural diagram of the transmission device described in this invention;

[0035] Figure 4 This is an assembly diagram of the sealing device, horizontal sealing device, and discharge conveying device in this invention;

[0036] Figure 5 This is a three-dimensional structural diagram of the present invention excluding the feeding conveyor device;

[0037] Figure 6 This is a three-dimensional structural diagram of the horizontal sealing device described in this invention;

[0038] Figure 7 This is a three-dimensional structural diagram of the transverse sealing film device described in this invention;

[0039] Figure 8 A three-dimensional structural schematic diagram of the sealing film device in this invention;

[0040] Figure 9 This is a front view of the sealing film device in this invention;

[0041] Figure 10 This is a schematic diagram of the structure of the first guide film wheel assembly of the present invention;

[0042] Figure 11 This is a schematic diagram of the structure of the second guide film wheel assembly of the present invention.

[0043] Reference numerals: 1-Frame body; 2-Feeding conveyor; 3-Sealing device; 301-Transmission mounting plate; 302-Sealing conveyor; 3021-Sealing conveyor belt drive shaft; 3022-Bag forming component; 3023-Main conveyor belt; 3024-Secondary conveyor belt; 303-Sealing and sealing device; 3031-Sealing drive shaft; 3032-First guide roller assembly; 30321-First sealing drive roller; 30322-First sealing driven roller; 30323-First transmission gear; 30324-First transmission sprocket; 3033-Second guide roller assembly; 30331-Second sealing drive roller; 30332-Second sealing driven roller; 30333-Second transmission gear; 3034-Hot cutting knife; 3035 3036 - Upper guide film belt; 304 - Lower guide film belt; 305 - Mounting bracket; 306 - Lifting device; 307 - Lifting drive motor; 308 - Lifting adjusting screw; 309 - Horizontal guide rail; 3004 - Mounting plate; 3055 - Guide plate; 3056 - Horizontal slide plate; 307 - Middle seal opening and closing device; 408 - Horizontal sealing device; 401 - Lifting platform; 4011 - Inverted U-shaped fixing plate; 4012 - Horizontal sealing height adjusting seat; 4013 - Horizontal sealing height adjusting screw; 4014 - Horizontal sealing lifting plate; 4015 - Horizontal sealing lifting drive device; 4016 - Rotary bearing; 4017 - Horizontal guide rod; 4018 - Lifting plate height adjusting sprocket; 402 - Horizontal pushing device; 4021 - Horizontal pushing plate; 403 - Horizontal sealing... Sealing device; 4031-Upper horizontal sealing knife; 4032-Lower horizontal sealing knife; 4033-Knife holder guide rod; 4034-Upper and lower sealing knife drive device; 4035-Upper knife holder; 4036-Lower knife holder; 5-Discharge conveying device; 501-Discharge drive shaft; 502-Discharge opening and closing device; 6-Film support device; 7-Film feeding device; 701-Film feeding drive shaft; 8-Waste recycling turntable; 801-Rotating shaft; 9-Transmission device; 901-Transmission drive motor; 902-Transmission synchronous pulley set; 903-Main transmission sprocket; 904-First discharge transmission sprocket; 905-Second discharge transmission sprocket; 906-First film feeding transmission sprocket; 907-Second film feeding transmission sprocket; 908-Third film feeding transmission sprocket; 909-First middle... 9010 - Second intermediate sealing drive sprocket; 9011 - First bearing slide bar; 9012 - Third intermediate sealing drive sprocket; 9013 - Intermediate sealing conveyor belt drive sprocket; 9014 - First waste turntable drive sprocket; 9015 - Second waste turntable drive sprocket; - Driving synchronous pulley; - Driven synchronous pulley; 9018 - Discharge drive chain; 9019 - Film feeding drive chain; 9020 - Intermediate sealing drive chain; 9021 - Turntable drive chain; 9022 - First film winding wheel; 9023 - Second film winding wheel; 9024 - Film winding belt; 9025 - Main drive chain; 9026 - First transition sprocket group; 9027 - Second transition sprocket group; 9028 - Second bearing slide bar; 10 - Horizontal guide rail; 11 - Pull plate. Detailed Implementation

[0044] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0045] like Figure 1 As shown, a heat shrink packaging machine includes a frame body 1. From left to right, the frame body 1 is provided with a feeding conveyor 2, a center sealing device 3, a horizontal sealing device 4, and a discharge conveyor 5. Below the feeding end of the center sealing device 3, there is a film supporting device 6 and a film feeding device 7. The center sealing device 3 is also provided with a waste recycling turntable 8. The center sealing device 3, the film feeding device 7, and the discharge conveyor 5 share a set of transmission devices 9.

[0046] like Figure 2 and Figure 3 As shown, the transmission device 9 includes a transmission drive motor 901, a transmission synchronous pulley set 902, a main transmission sprocket 903, a first discharge transmission sprocket 904, a second discharge transmission sprocket 905, a first film-feeding transmission sprocket 906, a second film-feeding transmission sprocket 907, a third film-feeding transmission sprocket 908, a first center-sealing transmission sprocket 909, a second center-sealing transmission sprocket 9010, a third center-sealing transmission sprocket 9012, a center-sealing conveyor belt transmission sprocket 9013, a first waste material turntable transmission sprocket 9014, a second waste material turntable transmission sprocket 9015, and a film tensioning wheel set;

[0047] The drive motor 901 is fixedly mounted on the base plate of the frame body 1. The drive synchronous pulley group 902 includes a driving synchronous pulley and a driven synchronous pulley. The driving synchronous pulley and the driven synchronous pulley are driven by a synchronous belt. The driving synchronous pulley is fixedly mounted on the output shaft of the drive motor 901. The main drive sprocket 903, the first discharge drive sprocket 904 and the driven synchronous pulley are coaxially arranged and fixedly mounted on the base plate. The second discharge drive sprocket 905 is fixedly mounted on one end of the discharge drive shaft 501 of the discharge conveying device 5. The second discharge drive sprocket 905 is driven by the first and second discharge drive sprockets 905 through the discharge drive chain 9018.

[0048] A transmission mounting plate 301 is provided on one side of the sealing device 3. The first film-feeding transmission sprocket 906 is mounted on the transmission mounting plate 301. The second film-feeding transmission sprocket 907 is coaxially arranged with the first film-feeding transmission sprocket 906. The third film-feeding transmission sprocket 908 is fixedly installed at one end of the film-feeding drive shaft 701 of the film-feeding device 7. The second transmission sprocket and the third film-feeding transmission sprocket 908 are driven by the film-feeding transmission chain 9019.

[0049] The first sealing drive sprocket 909 is mounted on the transmission mounting plate 301. A first bearing slide rod 9011 is provided between the first sealing drive sprocket 909 and the second sealing drive sprocket 9010. A second bearing slide rod 9028 is provided between the second sealing drive sprocket 9010 and the third sealing drive sprocket 9012. The third sealing drive sprocket 9012 is mounted on one end of the sealing film drive main shaft 3031 of the sealing device 3. A pulley is provided on one side of the first sealing drive sprocket 909 and the second sealing drive sprocket 9010. The first sealing drive sprocket 909 and the second sealing drive sprocket 9010 are driven by a belt. The second sealing drive sprocket 9010 and the third sealing drive sprocket 9012 are driven by a sealing drive chain 9020.

[0050] The central sealing conveyor belt drive sprocket 9013 is installed at one end of the central sealing conveyor belt drive shaft 3021 of the central sealing device 3. The first waste material turntable drive sprocket 9014 is coaxially arranged with the central sealing conveyor belt drive sprocket 9013. The second waste material turntable drive sprocket 9015 is installed on the frame body 1. The film tensioning wheel group includes a first film winding wheel 9022 and a second film winding wheel 9023. The first film winding wheel 9022 is coaxially arranged with the second waste material turntable drive sprocket 9015. The second film winding wheel 9023 is installed on the rotating shaft 801 of the waste recycling turntable 8. The first waste material turntable drive sprocket 9014 and the second waste material turntable drive sprocket 9015 are driven by the turntable drive chain 9021. The first film winding wheel 9022 and the second film winding wheel 9023 are driven by the film winding belt 9024.

[0051] The main drive sprocket 903 is driven by the main drive chain 9025, the first film-moving drive sprocket 906, the first central sealing drive sprocket 909, and the central sealing conveyor belt drive sprocket 9013.

[0052] The transmission device 9 further includes a first transition sprocket set 9026 and a second transition sprocket set 9027. The first transition sprocket set 9026 meshes with the discharge transmission chain 9018, and the second transition sprocket set 9027 meshes with the main transmission chain 9025. The first transition sprocket set 9026 and the second transition sprocket set 9027 are used to adjust the pressure angle between each sprocket, optimize the pressure distribution between the first film-carrying transmission sprocket 906, the first center-sealing transmission sprocket 909 and the center-sealing conveyor belt transmission sprocket 9013, reduce wear, and improve transmission efficiency.

[0053] The transmission process of the transmission device 9 is as follows: when the heat shrink packaging machine packages the product to be packaged, the transmission drive motor 901 is started. The transmission drive motor 901 drives the main transmission sprocket 903 and the first discharge transmission sprocket 904 to rotate synchronously through the transmission synchronous pulley group 902. The first discharge transmission sprocket 904 drives the second discharge transmission sprocket 905 through the discharge transmission chain 9018. The discharge drive shaft 501 rotates under the action of the second discharge transmission sprocket 905. Simultaneously, the main drive sprocket 903 drives the first film-feeding drive sprocket 906, the first middle sealing drive sprocket 909, and the middle sealing conveyor belt drive sprocket 9013 to rotate synchronously via the main drive chain 9025. The first film-feeding drive sprocket 906, the first middle sealing drive sprocket 909, and the middle sealing conveyor belt drive sprocket 9013, in turn, drive the film-feeding drive shaft 701, the sealing drive main shaft 3031, and the rotating shaft 801 of the waste recycling turntable 8 to rotate via the film-feeding drive chain 9019, the middle sealing drive chain 9020, and the turntable drive chain 9021, respectively.

[0054] like Figure 1 and Figures 4 to 10 As shown, the intermediate sealing device 3 includes an intermediate sealing conveyor 302 and an intermediate sealing film device 303. The intermediate sealing film device 303 is disposed above the intermediate sealing conveyor 302 and mounted on the frame body 1 via a mounting bracket 304. The mounting bracket 304 is also provided with a lifting device 305 for adjusting the height of the intermediate sealing film device 303. The horizontal sealing device 4 includes a lifting platform 401 and a horizontal pushing device 402 and a horizontal sealing film device 403 disposed on the lifting platform 401. The horizontal pushing device 402 is connected to the horizontal sealing film device 403. An intermediate sealing opening and closing device 306 is provided at one end of the intermediate sealing conveyor 302 near the horizontal sealing device 4. The discharge conveyor 5 is located near the horizontal sealing device. One end of the device 4 is provided with a discharge opening and closing device 502. Both sides of one end of the middle sealing opening and closing device 306 and the discharge opening and closing device 502 are provided with horizontal guide rails 10. The middle sealing opening and closing device 306 is slidably engaged with the middle sealing conveying device 302 through the horizontal guide rails 10. The discharge opening and closing device 502 is slidably engaged with the discharge conveying device 5 through the horizontal guide rails 10. The horizontal sealing film device 403 is connected to the middle sealing opening and closing device 306 and the discharge opening and closing device 502 through the pull plate 11. When the horizontal pushing device 402 drives the horizontal sealing film device 403 to perform horizontal reciprocating motion, the middle sealing opening and closing device 306 and the discharge opening and closing device 502 move synchronously under the drive of the pull plate 11.

[0055] like Figure 4As shown, conveying guide plates are fixedly installed on both sides of the middle sealing opening and closing device 306 and the discharge opening and closing device 502 near the horizontal sealing device 4. The conveying guide plates are provided with guide grooves that cooperate with and connect with the pull plate 11. The middle part of the pull plate 11 is fixedly installed on the lower knife seat 4036, and both ends are slidably engaged with the guide grooves in the conveying guide plates on the middle sealing opening and closing device 306 and the discharge opening and closing device 502, respectively.

[0056] like Figure 9 As shown, the lifting device 305 includes a lifting drive motor 3051, a lifting adjustment screw 3052, and a transverse guide rail 3053. The lifting drive motor 3051 is fixedly mounted on the mounting plate 3054 on the top of the mounting frame 304. One end of the lifting adjustment screw 3052 is fixedly engaged with the output shaft of the lifting drive motor 3051, and the other end is threadedly engaged with the transverse guide rail 3053. Both ends of the transverse guide rail 3053 are vertically slidably engaged with the mounting frame 304 through guide plates 3055. The guide plate 3055 is provided with a sealing film drive spindle mounting block. The sealing film drive spindle 3031 is mounted on the transverse guide rail 3053 through the sealing film drive spindle mounting block. During the lifting process, the transverse guide rail 3053 drives the sealing film drive spindle 3031 to lift synchronously. The middle sealing device 303 is slidably engaged with the transverse guide rail 3053 through a transverse sliding plate 3056.

[0057] like Figures 8 to 11As shown, the sealing device 303 includes a first guide roller assembly 3032, a second guide roller assembly 3033, a hot cutting blade 3034, and a sealing drive spindle 3031. The first guide roller assembly 3032 includes a first sealing drive roller 30321 and a first sealing driven roller 30322. The second guide roller assembly 3033 includes a second sealing drive roller 30331 and a second sealing driven roller 30332. An upper guide belt 3035 and a lower guide belt 3036 are provided between the first sealing drive roller 30321 and the first sealing driven roller 30322, and between the second sealing drive roller 30331 and the second sealing driven roller 30332. A first transmission belt is coaxially arranged on the first sealing drive roller 30321. The first transmission sprocket 30324 and the second sealing drive sprocket 30331 are coaxially mounted with a second transmission gear 30333. The first transmission gear 30323 meshes with the second transmission gear 30333. The other end of the sealing drive shaft 3031 is chain-driven with the first transmission sprocket 30324. The upper guide belt 3035 and lower guide belt 3036 of the first guide belt assembly 3032 and the upper guide belt 3035 and lower guide belt 3036 of the second guide belt assembly 3033 are in contact with each other to form a guide path. The hot cutting blade 3034 passes laterally through the guide path through the gap between the upper guide belt 3035 and the lower guide belt 3036. A rolling bearing is provided on the first guide belt assembly 3032. The rolling bearing is located at the front end of the hot cutting blade 3034. Before the packaging film reaches the hot cutting blade 3034 for cutting, the rolling bearing will hold the packaging film in place, so that the area of ​​the packaging film to be sealed is in a stretched state, which can ensure that the sealing area of ​​the packaging film remains flat.

[0058] like Figures 6 to 7 As shown, the horizontal sealing device 403 includes an upper horizontal sealing knife 4031, a lower horizontal sealing knife 4032, a knife holder guide rod 4033, and an upper and lower sealing knife driving device 4034. The upper horizontal sealing knife 4031 is fixedly mounted on the upper end of the knife holder guide rod 4033 via an upper knife holder 4035. The lower horizontal sealing knife 4032 is slidably engaged with the knife holder guide rod 4033 via a lower knife holder 4036. The upper and lower sealing knife driving device 4034 is used to control the opening and closing of the upper horizontal sealing knife 4031 and the lower horizontal sealing knife 4032. The upper and lower sealing knife drive device 4034 includes a horizontal sealing servo motor, a sealing swing arm, a connecting rod, and a push-pull plate 11. The horizontal sealing servo motor is fixedly installed in the middle of the horizontal push plate 4021. The knife holder guide rod 4033 slides up and down with the horizontal push plate through a linear bearing. The push-pull plate 11 is fixedly installed at the lower end of the knife holder guide rod 4033. The middle part of the sealing swing arm is fixedly connected to the output shaft of the horizontal sealing servo motor. The two ends of the sealing swing arm are respectively connected to the lower knife holder 4036 and the push-pull plate 11 through connecting rods.

[0059] The sealing arm swings under the drive of the horizontal sealing servo motor. During the clockwise swing from a horizontal to a vertical position, the lower knife holder 4036 moves upward under the push of the connecting rod, while the upper knife holder 4035 and the push-pull plate 11 move downward synchronously under the push of the connecting rod, until the upper horizontal sealing knife 4031 and the lower horizontal sealing knife 4032 close to horizontally seal the packaging bag. The clockwise swing of the sealing arm from a vertical to a horizontal position is the process of the upper and lower horizontal sealing knives 4031 and 4032 resetting. The upper and lower sealing knife drive device 4034 enables the upper and lower horizontal sealing knives 4031 and 4032 to perform synchronous closing and opening actions, improving sealing efficiency.

[0060] like Figure 6 As shown, the lifting platform 401 includes an inverted U-shaped fixing plate 4011, a horizontal sealing height adjusting seat 4012, a horizontal sealing height adjusting screw 4013, a horizontal sealing lifting plate 4014, and a horizontal sealing lifting drive device 4015. The inverted U-shaped fixing plate 4011 is fixedly installed on the frame base, and the horizontal sealing height adjusting seat 4012 is fixedly installed on the upper end of the inverted U-shaped fixing plate 4011. One end of the horizontal sealing height adjusting screw 4013 is threadedly engaged with the horizontal sealing height adjusting seat 4012. One end is rotatably engaged with the horizontal sealing lifting plate 4014 via a rotating bearing 4016. A set of horizontal guide rods 4017 are provided on the horizontal sealing lifting plate 4014. The horizontal sealing film sealing device 403 is slidably engaged with the horizontal guide rods 4017 via a horizontal pushing plate 4021. A lifting plate height adjusting sprocket 4018 is fixedly installed on the horizontal sealing height adjusting screw 4013. The horizontal sealing lifting drive device 4015 and the horizontal sealing height adjusting screw 4013 are driven by a chain.

[0061] The sealing conveyor device 302 includes a bag forming component 3022, a main conveyor belt 3023, and auxiliary conveyor belts 3024 disposed on both sides of the main conveyor belt 3023. The bag forming component 3022 is disposed at the starting end of the main conveyor belt 3023.

[0062] The method of using the heat shrink packaging machine described in this invention is as follows:

[0063] S1. Adjust the height of the center sealing film device 303 and the horizontal sealing film device 403 according to the size of the product to be packaged;

[0064] S2. The packaging film placed on the film support device 6 enters the bag forming component 3022 through the film feeding device 7 for initial bag forming. At the same time, the product to be packaged is conveyed to the bag forming component 3022 through the feeding conveyor 2 and wrapped by the packaging film. It continues to move forward under the action of the center sealing conveyor 302.

[0065] S3. The packaging film, after being pulled by the traction wheel set, enters the sealing device 303 for sealing operation.

[0066] S4, Center sealing operation: The first guide film roller group 3032 and the second guide film roller group 3033 guide and transport the packaging film. When the packaging film passes through the hot cutter 3034, it will be cut into upper and lower parts. The upper part is led out by the upper guide film belt 3035 and transported to the waste recycling turntable 8 for recycling. The lower part is first pulled by the lower guide film belt 3036 and passes through the lower surface of the hot cutter 3034 for center sealing, and then transported to the horizontal sealing device 4 for horizontal sealing operation.

[0067] S5. Horizontal sealing operation: The upper and lower sealing knife driving device 4034 controls the upper horizontal sealing knife 4031 and the lower horizontal sealing knife 4032 to perform closing and opening actions. While the upper horizontal sealing knife 4031 and the lower horizontal sealing knife 4032 are closing, the horizontal pushing device 402 drives the horizontal sealing film device 403, the middle sealing opening and closing device 306 and the discharge opening and closing device 502 to move horizontally as a whole. During this process, the packaging bag is moving relative to the entire production line, but it remains relatively stationary with respect to the upper horizontal sealing knife 4031 and the lower horizontal sealing knife 4032, thereby increasing the sealing time and eliminating the need for periodic pauses.

[0068] S6. After being horizontally sealed by the horizontal sealing device 4, the packaged product enters the discharge conveyor device 5 to complete the discharge.

[0069] The above description is merely the optimal embodiment of the present invention and is not intended to limit the present invention. Any modifications or substitutions made by those skilled in the art without departing from the essence and scope of protection of the present invention should also be within the scope of protection of the present invention.

Claims

1. A heat shrink packaging machine, characterized in that: The machine includes a frame body (1), which is provided with a feeding conveyor (2), a middle sealing device (3), a horizontal sealing device (4) and a discharge conveyor (5) from left to right. The middle sealing device (3) is provided with a film support device (6) and a film feeding device (7) below the feeding end. The middle sealing device (3) is also provided with a waste recycling turntable (8). The middle sealing device (3), the film feeding device (7) and the discharge conveyor (5) share a set of transmission devices (9).

2. The heat shrink packaging machine according to claim 1, characterized in that: The transmission device (9) includes a transmission drive motor (901), a transmission synchronous pulley set (902), a main transmission sprocket (903), a first discharge transmission sprocket (904), a second discharge transmission sprocket (905), a first film-moving transmission sprocket (906), a second film-moving transmission sprocket (907), a third film-moving transmission sprocket (908), a first center-sealing transmission sprocket (909), a second center-sealing transmission sprocket (9010), a third center-sealing transmission sprocket (9012), a center-sealing conveyor belt transmission sprocket (9013), a first waste turntable transmission sprocket (9014), a second waste turntable transmission sprocket (9015), and a film tensioning wheel set; The drive motor (901) is fixedly mounted on the base plate of the frame body (1). The drive synchronous pulley group (902) includes an active synchronous pulley and a driven synchronous pulley. The active synchronous pulley and the driven synchronous pulley are driven by a synchronous belt. The active synchronous pulley is fixedly mounted on the output shaft of the drive motor (901). The main drive sprocket (903), the first discharge drive sprocket (904) and the driven synchronous pulley are coaxially arranged and fixedly mounted on the base plate. The second discharge drive sprocket (905) is fixedly mounted on one end of the discharge drive shaft (501) of the discharge conveying device (5). The second discharge drive sprocket (905) and the first and second discharge drive sprockets (905) are driven by the discharge drive chain (9018). A transmission mounting plate (301) is provided on one side of the sealing device (3). The first film-moving transmission sprocket (906) is mounted on the transmission mounting plate (301). The second film-moving transmission sprocket (907) is coaxially arranged with the first film-moving transmission sprocket (906). The third film-moving transmission sprocket (908) is fixedly installed at one end of the film-moving drive shaft (701) of the film-moving device (7). The second transmission sprocket and the third film-moving transmission sprocket (908) are driven by the film-moving transmission chain (9019). The first sealing drive sprocket (909) is mounted on the transmission mounting plate (301). A first bearing slide rod (9011) is provided between the first sealing drive sprocket (909) and the second sealing drive sprocket (9010). A second bearing slide rod (9028) is provided between the second sealing drive sprocket (9010) and the third sealing drive sprocket (9012). The third sealing drive sprocket (9012) is mounted on one end of the sealing film drive spindle (3031) of the sealing device (3). A pulley is provided on one side of the first sealing drive sprocket (909) and the second sealing drive sprocket (9010). The first sealing drive sprocket (909) and the second sealing drive sprocket (9010) are driven by a belt. The second sealing drive sprocket (9010) and the third sealing drive sprocket (9012) are driven by a sealing drive chain (9020). The transmission sprocket (9013) of the sealing conveyor belt is installed at one end of the driving shaft (3021) of the sealing device (3). The first waste turntable transmission sprocket (9014) is coaxially arranged with the sealing conveyor belt transmission sprocket (9013). The second waste turntable transmission sprocket (9015) is installed on the frame body (1). The film tensioning wheel group includes a first film roller (9022) and a second film roller (9023). (9022) is coaxially arranged with the second waste turntable drive sprocket (9015), and the second film roll wheel (9023) is installed on the rotating shaft (801) of the waste recycling turntable (8). The first waste turntable drive sprocket (9014) and the second waste turntable drive sprocket (9015) are driven by the turntable drive chain (9021), and the first film roll wheel (9022) and the second film roll wheel (9023) are driven by the film roll belt (9024). The main drive sprocket (903) is driven by the main drive chain (9025) to the first film-moving drive sprocket (906), the first central sealing drive sprocket (909), and the central sealing conveyor belt drive sprocket (9013).

3. The heat shrink packaging machine according to claim 2, characterized in that: The transmission device (9) further includes a first transition sprocket set (9026) and a second transition sprocket set (9027). The first transition sprocket set (9026) meshes with the discharge transmission chain (9018), and the second transition sprocket set (9027) meshes with the main transmission chain (9025).

4. The heat shrink packaging machine according to claim 2, characterized in that: The sealing device (3) includes a sealing conveyor (302) and a sealing film device (303). The sealing film device (303) is located above the sealing conveyor (302) and is mounted on the frame body (1) via a mounting bracket (304). The mounting bracket (304) is also provided with a lifting device (305) for adjusting the height of the sealing film device (303). The horizontal sealing device (4) includes a lifting platform (401) and a horizontal pushing device (402) and a horizontal sealing film device (403) located on the lifting platform (401). The horizontal pushing device (402) is connected to the horizontal sealing film device (403). The sealing conveyor (302) is provided with a sealing opening and closing device (306) at one end near the horizontal sealing device (4). The discharge conveyor (5) is located near the horizontal sealing device (4). 4) One end is provided with a discharge opening and closing device (502). Both sides of one end of the middle sealing opening and closing device (306) and the discharge opening and closing device (502) are provided with horizontal guide rails (10). The middle sealing opening and closing device (306) is slidably engaged with the middle sealing conveying device (302) through the horizontal guide rail (10). The discharge opening and closing device (502) is slidably engaged with the discharge conveying device (5) through the horizontal guide rail (10). The horizontal sealing film device (403) is connected to the middle sealing opening and closing device (306) and the discharge opening and closing device (502) through the pull plate (11). When the horizontal pushing device (402) drives the horizontal sealing film device (403) to perform horizontal reciprocating motion, the middle sealing opening and closing device (306) and the discharge opening and closing device (502) move synchronously under the drive of the pull plate (11).

5. The heat shrink packaging machine according to claim 4, characterized in that: The lifting device (305) includes a lifting drive motor (3051), a lifting adjustment screw (3052), and a transverse guide rail (3053). The lifting drive motor (3051) is fixedly mounted on the mounting plate (3054) on the top of the mounting frame (304). One end of the lifting adjustment screw (3052) is fixedly engaged with the output shaft of the lifting drive motor (3051), and the other end is threadedly engaged with the transverse guide rail (3053). Both ends of the transverse guide rail (3053) are vertically slidably engaged with the mounting frame (304) through guide plates (3055). The middle sealing film device (303) is slidably engaged with the transverse guide rail (3053) through a transverse sliding plate (3056).

6. The heat shrink packaging machine according to claim 4, characterized in that: The sealing device (303) includes a first guide wheel assembly (3032), a second guide wheel assembly (3033), a hot cutting blade (3034), and a sealing drive spindle (3031). The first guide wheel assembly (3032) includes a first sealing drive wheel (30321) and a first sealing driven wheel (30322). The second guide wheel assembly (3033) includes a second sealing drive wheel (30331) and a second sealing driven wheel (30332). An upper guide belt (3035) and a lower guide belt (3036) are provided between the first sealing drive wheel (30321) and the first sealing driven wheel (30322), and between the second sealing drive wheel (30331) and the second sealing driven wheel (30332). A first transmission is coaxially provided on the first sealing drive wheel (30321). The gear (30323) and the first transmission sprocket (30324) are coaxially arranged with the second sealing film drive wheel (30331) and the second transmission gear (30333). The first transmission gear (30323) and the second transmission gear (30333) mesh and drive each other. The other end of the sealing film drive spindle (3031) is chain driven with the first transmission sprocket (30324). The upper guide film belt (3035) and the lower guide film belt (3036) of the first guide film wheel group (3032) are in contact with the upper guide film belt (3035) and the lower guide film belt (3036) of the second guide film wheel group (3033) to form a guide film path. The hot cutting knife (3034) passes laterally through the guide film path through the gap between the upper guide film belt (3035) and the lower guide film belt (3036).

7. The heat shrink packaging machine according to claim 1, characterized in that: The horizontal sealing device (403) includes an upper horizontal sealing knife (4031), a lower horizontal sealing knife (4032), a knife holder guide rod (4033), and an upper and lower sealing knife driving device (4034). The upper horizontal sealing knife (4031) is fixedly mounted on the upper end of the knife holder guide rod (4033) via an upper knife holder (4035). The lower horizontal sealing knife (4032) slides with the knife holder guide rod (4033) via a lower knife holder (4036). The upper and lower sealing knife driving device (4034) is used to control the opening and closing of the upper horizontal sealing knife (4031) and the lower horizontal sealing knife (4032).

8. The heat shrink packaging machine according to claim 1, characterized in that: The lifting platform (401) includes an inverted U-shaped fixing plate (4011), a horizontal sealing height adjusting seat (4012), a horizontal sealing height adjusting screw (4013), a horizontal sealing lifting plate (4014), and a horizontal sealing lifting drive device (4015). The inverted U-shaped fixing plate (4011) is fixedly installed on the frame base. The horizontal sealing height adjusting seat (4012) is fixedly installed on the upper end of the inverted U-shaped fixing plate (4011). One end of the horizontal sealing height adjusting screw (4013) is threaded into the horizontal sealing height adjusting seat (4012), and the other end... The end is rotatably engaged with the horizontal sealing lifting plate (4014) via a rotating bearing (4016). A set of horizontal guide rods (4017) is provided on the horizontal sealing lifting plate (4014). The horizontal sealing film device (403) is slidably engaged with the horizontal guide rods (4017) via a horizontal push plate (4021). A lifting plate height adjusting sprocket (4018) is fixedly installed on the horizontal sealing height adjusting screw (4013). The horizontal sealing lifting drive device (4015) and the horizontal sealing height adjusting screw (4013) are driven by a chain.

9. The heat shrink packaging machine according to claim 1, characterized in that: The sealing conveyor device (302) includes a bag forming component (3022), a main conveyor belt (3023), and auxiliary conveyor belts (3024) disposed on both sides of the main conveyor belt (3023). The bag forming component (3022) is disposed at the starting end of the main conveyor belt (3023).

10. A packaging method, characterized in that: Includes the following steps: S1. Adjust the height dimensions of the center sealing film device (303) and the horizontal sealing film device (403) according to the size of the product to be packaged; S2. The packaging film placed on the film support device (6) enters the bag forming component (3022) through the film feeding device (7) for initial bag forming. At the same time, the product to be packaged is transported to the bag forming component (3022) through the feeding conveyor (2) and wrapped by the packaging film, and continues to move forward under the action of the center sealing conveyor (302). S3. The packaging film to be sealed is pulled into the sealing device (303) by the traction wheel set for sealing operation; S4, middle sealing operation: The first guide film wheel group (3032) and the second guide film wheel group (3033) guide and transport the packaging film. When the packaging film passes through the hot cutter (3034), it will be cut into upper and lower parts. The upper part is led out by the upper guide film belt (3035) and transported to the waste recycling turntable (8) for recycling. The lower part is first passed through the lower surface of the hot cutter (3034) for middle sealing under the traction of the lower guide film belt (3036), and then transported to the horizontal sealing device (4) for horizontal sealing operation. S5, Horizontal sealing operation: The upper and lower sealing knife driving device (4034) controls the upper horizontal sealing knife (4031) and the lower horizontal sealing knife (4032) to perform closing and opening actions. While the upper horizontal sealing knife (4031) and the lower horizontal sealing knife (4032) are closing, the horizontal pushing device (402) drives the horizontal sealing film device (403), the middle sealing opening and closing device (306) and the discharge opening and closing device (502) to move horizontally as a whole. During this process, the packaging bag is moving relative to the entire production line, but it is relatively stationary with respect to the upper horizontal sealing knife (4031) and the lower horizontal sealing knife (4032), thereby increasing the sealing time and eliminating the need for periodic pauses. S6. After being horizontally sealed by the horizontal sealing device (4), the packaged product enters the discharge conveying device (5) to complete the discharge.

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