Water-soluble film back sealing machine

Abstract

The utility model relates to the technical field of packaging machines, in particular to a water-soluble film back sealing machine which comprises a machine box, a discharging mechanism used for quantitatively discharging materials, a bag conveying mechanism used for conveying packaging films and a heat sealing mechanism used for hot-pressing sewing and cutting of the packaging films, and the discharging mechanism, the bag conveying mechanism and the heat sealing mechanism are sequentially arranged on the machine box from top to bottom. A forming device used for forming a packaging film into a packaging bag is arranged on a discharging port of the discharging mechanism, and an adjusting assembly used for adjusting the bag forming size of the packaging film is arranged on the back side of the forming device. The adjusting assembly is arranged on one side of the forming device, so that the packaging film can be limited during bag forming, the problem that deformation and displacement are prone to occurring in the bag forming and cutting process is solved, meanwhile, the distance between stitches on the two sides of the packaging film can be adjusted according to the production requirement, the position of a sealing opening can be adjusted in real time, and the sealing effect is improved. And packaging bags with different sizes and specifications are sewn, so that continuous bag making of the packaging film is realized, and the packaging efficiency and the packaging quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging machines, in particular to a water-soluble film back sealing machine. Background Art

[0002] With the development of society, detergents are gradually transitioning from bagged laundry detergent or bottled laundry liquid to scouring pads or laundry scouring pads. These scouring pads are typically coated with a polyvinyl alcohol film, which quickly dissolves in water and can be used to package solid, liquid, or powdered cleaning materials. Polyvinyl alcohol film, also known as water-soluble film, is a new, environmentally friendly packaging material that undergoes a special process and rapidly degrades under natural conditions (water). It rapidly denatures, decomposes, and degrades into low-molecular-weight compounds under the action of natural factors (water), and has the effect of improving soil quality. Therefore, it is a new type of environmentally friendly packaging material. When using water-soluble film to package scouring pads or laundry scouring pads, they are typically packaged using a back-seal vertical packaging machine, making the bagged items more aesthetically pleasing, convenient, hygienic, and long-lasting.

[0003] The back-seal vertical packaging machine in the prior art usually adopts high-temperature hot pressing to sew the packaging film. However, due to the large plasticity of the water-soluble film material, it is easy to deform and shift during the unwinding and bag cutting process of the back-seal packaging machine, and the deformation and shift are irreversible, which in turn affects the stability of the packaging and the use effect of the product. At the same time, in the bag-making process, the former is generally of a fixed size, which determines the size of the packaging film and cannot be adapted to the requirements of various packaging specifications, resulting in poor product packaging effect and reduced packaging quality. Utility Model Content

[0004] In order to solve the technical defects raised in the above-mentioned background technology, the purpose of the present utility model is to provide a water-soluble film back-sealing machine, which aims to solve the problem that the back-sealing machine in the prior art is prone to deformation and displacement during the bag-making and bag-cutting processes, and cannot adjust the bag size according to actual production needs during the bag-making process. By setting an adjustment component to adjust the stitching spacing on both sides of the packaging film, it can adjust the sealing position in real time during stitching, thereby producing packaging bags of different sizes and improving packaging efficiency.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A water-soluble film back sealing machine comprises a chassis, a feeding mechanism for quantitatively discharging materials, a bag feeding mechanism for conveying packaging film, and a heat sealing mechanism for hot pressing and sewing and cutting packaging film, which are sequentially arranged on the chassis from top to bottom. A former for forming the packaging film into a packaging bag is provided on the discharge port of the feeding mechanism, and an adjusting component for adjusting the size of the packaging film bag is provided on the back side of the former; the adjusting component comprises a mounting bracket, a linear slide plate and a bag-making rod, and one end of the mounting bracket is fixedly connected to the top of the chassis One end is on the other end, and the other end is fixedly connected to the linear slide; one side of the linear slide plate is in contact with the side wall of the former, and a linear slide rail is provided on the linear slide plate along its length direction, and limit blocks are provided at both ends of the linear slide rail; the bag-making rod is axially symmetrically arranged on both sides of the former, and the bag-making rod is provided with a clamping groove for clamping and fixing the packaging film; a sliding sleeve is provided between the bag-making rod and the linear slide rail, the sliding sleeve is slidably connected to the linear slide rail, and one end of the sliding sleeve is transmission-connected to a driving member, and the driving member is fixed on the mounting bracket.

[0007] Preferably, the unloading mechanism includes a barrel, a hopper and a vibrator. The barrel is fixedly connected to the top of the chassis, and a plurality of unloading holes are distributed circumferentially on the barrel. The positions of the unloading holes in the hopper are connected to the bottom end of the barrel, and the bottom end of the hopper extends into the former; the vibrator is transmission-connected to the barrel and is used to drive the barrel to vibrate and unload.

[0008] Preferably, one end of the former is a curved fan-shaped structure, and the other end is a hollow cylindrical structure; and a plurality of restraining belts for guiding and positioning the packaging film are provided on the former, and a gap is formed between the plurality of restraining belts and the former for the packaging film to pass through and be cut into the heat sealing mechanism for sealing.

[0009] Preferably, the bag feeding mechanism includes a fixed bracket, a reeling roller arranged on the fixed bracket, and a tensioning adjustment assembly located below the reeling roller. The fixed bracket is fixed to the top of the chassis, and a driving motor is provided on the linkage bracket. The output end of the driving motor is connected to the reeling roller through a pulley assembly. The movable sleeve on the reeling roller is provided with an adjusting wheel for adjusting the width of the packaging film, and a locking rod is provided on the adjusting wheel.

[0010] Preferably, the tensioning adjustment assembly includes a connecting frame, a traction roller group, a guide roller and a tensioning roller, one end of the connecting frame is connected to the fixed bracket, and the other end is fixedly connected to the traction roller group, and the connecting frame is provided with a slide groove along its length direction, the guide roller and the tensioning roller are slidably connected in the slide groove, and a tensioning wheel is provided on the tensioning roller, and a correction assembly for positioning and preventing the water-soluble film from being offset is provided between the traction roller group and the guide roller.

[0011] Preferably, the heat sealing mechanism includes a back sealing assembly for hot-pressing and sewing the left and right sides of the packaging film, and a transverse sealing assembly for hot-pressing and sewing the two ends of the packaging film. The back sealing assembly is vertically arranged on the back side of the discharge barrel, and a pair of hot-melt edge gears for rolling, clamping and fixing the packaging film are arranged just below the bottom end of the back sealing assembly; the transverse sealing assembly is horizontally arranged below the discharge barrel, and a cutter assembly for cutting the water-soluble film packaging film is arranged in the transverse sealing assembly.

[0012] Preferably, the back seal assembly includes a back seal heating splint, a connecting plate and a movable support plate. The back seal heating splints are vertically arranged in a group, and the opposite sides of the back seal heating splints in one group are arranged as a striped structure; one side of the connecting plate is fixedly connected to the back seal heating splint, and the other side is connected to the movable support plate; the movable support plate extends into the chassis, and the movable support plate is transmission-connected with a transmission part for driving the back seal heating splint to move left and right for docking.

[0013] Preferably, the transverse sealing assembly includes a stack of parallel transverse sealing heating splints, guide plates arranged on both sides of a pair of transverse sealing heating splints, and guide rods for driving the transverse sealing heating splints to slide back and forth. A strip groove is provided at the middle position of the transverse sealing heating splint, and the cutter assembly is fixedly connected to the strip groove; both ends of the guide plate are sleeved on the guide rod; one end of the guide rod is fixedly connected to the limiting plate, and the other end is transmission-connected to the guide drive assembly.

[0014] In summary, the beneficial effects of the present invention are as follows:

[0015] The utility model provides an adjustment component on one side of the former, and utilizes the bag-making rod to assist in bending and stretching the packaging film, thereby limiting the packaging film when forming bags, so as to prevent the problem of deformation and displacement that is easy to occur during the bag-forming and bag-cutting processes. At the same time, the spacing between the seams on both sides of the packaging film can be adjusted according to production needs, so that the sealing position can be adjusted in real time, and packaging bags of different sizes and specifications can be sewn, thereby realizing continuous bag-making of the packaging film and improving packaging efficiency. In addition, the utility model has the advantages of low creation and modification cost, simplicity, and easy installation and maintenance, and is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the utility model water-soluble film back sealing machine;

[0017] Figure 2 yes Figure 1 A magnified view of the structure at a in the middle;

[0018] Figure 3 This is a front view of the water-soluble film back sealing machine of the utility model;

[0019] Figure 4 yes Figure 3 A magnified view of the structure at point b;

[0020] Figure 5 This is a cross-sectional view of the utility model water-soluble film back sealing machine;

[0021] Figure 6 yes Figure 5 Enlarged view of the structure at c in the middle.

[0022] Description of reference numerals in the figures:

[0023] 1. Chassis; 2. Feeding mechanism; 21. Feed barrel; 211. Feeding hole; 22. Feeding hopper; 23. Vibrator; 3. Bag feeding mechanism; 31. Fixed bracket; 32. Unwinding roller; 321. Adjusting wheel; 322. Locking lever; 33. Tensioning adjustment assembly; 331. Connecting frame; 3311. Slide; 332. Pulling roller assembly; 333. Guide roller; 334. Tensioning roller; 3341. Tensioning wheel; 34. Drive motor; 4. Heat sealing mechanism; 41. Back seal assembly; 411. Back seal heating clamp; 412. Connecting plate; 41 3. Movable bracket plate; 414. Transmission part; 42. Horizontal sealing assembly; 421. Horizontal sealing heating splint; 4211. Strip groove; 422. Guide plate; 423. Guide rod; 424. Limit plate; 425. Guide drive assembly; 43. Hot melt edge gear; 44. Cutter assembly; 5. Forming device; 6. Adjustment assembly; 61. Mounting bracket; 62. Linear slide plate; 63. Bag making rod; 631. Clamping groove; 64. Linear slide rail; 65. Limit block; 66. Sleeve; 67. Driving part; 7. Restraint belt; 8. Correction assembly. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0025] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0026] In the description of this utility model, if the word "several" or "several" is used, it means one or more, and "more" means two or more. "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of the words "first," "second," and "third" is only for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] The following is combined with Figure 1-6 , an embodiment of a water-soluble film back sealing machine of the utility model is further described in detail.

[0028] A water-soluble film back sealing machine, such as Figure 1 and Figure 4 As shown, it includes a chassis 1, a feeding mechanism 2 for quantitatively discharging materials, a bag feeding mechanism 3 for conveying packaging film, and a heat sealing mechanism 4 for hot pressing, sewing and cutting the packaging film, which are arranged on the chassis 1 from top to bottom. A former 5 for forming the packaging film into a packaging bag is provided on the discharge port of the feeding mechanism 2, and an adjusting component 6 for adjusting the size of the packaging film bag is provided on the back side of the former 5; the adjusting component 6 includes a mounting bracket 61, a linear slide plate 62 and a bag making rod 63, one end of the mounting bracket 61 is fixedly connected to the top of the chassis 1, and the other end is fixed to the linear slide One side of the linear slide plate 62 abuts against the side wall of the former 5, and a linear slide rail 64 is provided on the linear slide plate 62 along its length direction, and a limit block 65 is provided at both ends of the linear slide rail 64; the bag-making rod 63 is axially symmetrically arranged on both sides of the former 5, and the bag-making rod 63 is provided with a clamping groove 631 for clamping and fixing the packaging film; a sliding sleeve 66 is provided between the bag-making rod 63 and the linear slide rail 64, the sliding sleeve 66 is slidably connected to the linear slide rail 64, and one end of the sliding sleeve 66 is transmission-connected to a driving member 67, and the driving member 67 is fixed on the mounting bracket 61.

[0029] Specifically, when the packaging film is fed through the bag feeding mechanism 3, the former 5 can enclose the packaging film to form a bag structure, and perform heat-pressing and sewing on the enclosed edges and upper and lower ends through the heat sealing mechanism 4 to form a sealed packaging bag structure. When the packaging film is attached to the former 5, both sides of the packaging film pass through the clamping groove 631 on the bag making rod 63 at the same time. When the size of the packaging film bag needs to be adjusted, the bag making rod 63 is moved left and right to drive the packaging film to move synchronously, thereby adjusting the distance between the two sides of the packaging film, so that the sealing position can be adjusted in real time during sewing. The bag making rod 63 slides along the linear slide rail 64 during the movement, and the sliding distance is controlled by the driving member 67. The driving member 67 can adopt a driving motor 34, a cylinder or an electric cylinder.

[0030] In this embodiment, if Figure 2 As shown, the unloading mechanism 2 includes a barrel 21, a unloading hopper 22 and a vibrator 23. The barrel 21 is fixedly connected to the top of the chassis 1, and a plurality of unloading holes 211 are distributed circumferentially on the barrel 21. The position of the unloading holes 211 of the unloading hopper 22 is connected to the bottom end of the barrel 21, and the bottom end of the unloading hopper 22 extends into the former 5; the vibrator 23 is transmission-connected to the barrel 21 for driving the barrel 21 to vibrate and unload.

[0031] Specifically, the barrel 21 is used to store the materials to be packaged, and the materials are discharged through the discharge hopper 22 with a conical structure at the bottom. In order to prevent the materials from blocking the discharge port, a vibrator 23 is set to drive the barrel 21 to vibrate, so that the materials inside can be transmitted to the former 5 through the discharge hole 211.

[0032] In this embodiment, if Figure 1 As shown, one end of the former 5 is a curved fan-shaped structure, and the other end is a hollow cylindrical structure; and a plurality of restraining belts 7 for guiding and positioning the packaging film are provided on the former 5, and a gap is formed between the plurality of restraining belts 7 and the former 5 for the packaging film to pass through and be fed to the heat sealing mechanism 4 for sealing.

[0033] Specifically, the former 5 can position and shape the packaging film. One end of the former is set to a curved fan structure to better fit the structure of the lower hopper 22 so that it can be fixed on the lower hopper 22. The other end is set to a hollow cylindrical structure for better material unloading. The material is transferred to the packaging bag at the bottom through the hollow cylindrical structure. At the same time, in order to avoid the problem of deformation and displacement of the packaging film in the former 5, a restraining belt 7 is provided on the outer surface of the former 5. The position of the packaging film is limited by the restraining belt 7, and it can pass through the gap and extend down to the heat sealing mechanism 4 for heat sealing packaging.

[0034] In this embodiment, if Figure 3 and Figure 5 As shown, the bag feeding mechanism 3 includes a fixed bracket 31, an unwinding roller 32 mounted on the fixed bracket 31, and a tensioning adjustment assembly 633 located below the unwinding roller 32. The fixed bracket 31 is fixed to the top of the chassis 1, and a driving motor 34 is mounted on the linkage bracket. The output end of the driving motor 34 is connected to the unwinding roller 32 via a pulley assembly. An adjusting wheel 321 for adjusting the width of the packaging film is movably mounted on the unwinding roller 32. A locking rod 322 is mounted on the adjusting wheel 321. The adjusting wheels 321 on both sides are used to limit the position of the packaging film, and the locking rod 322 secures the adjusting wheels 321 to the unwinding roller 32. When changing to a packaging film of a different width, the locking rod 322 is simply released and the position of the adjusting wheel 321 is adjusted.

[0035] Specifically, the tensioning adjustment assembly 633 includes a connecting frame 331, a traction roller group 332, a guide roller 333 and a tensioning roller 334. One end of the connecting frame 331 is connected to the fixed bracket 31, and the other end is fixedly connected to the traction roller group 332. The connecting frame 331 is provided with a slide groove 3311 along its length direction. The guide roller 333 and the tensioning roller 334 are slidably connected in the slide groove 3311. The tensioning roller 334 is provided with a tensioning wheel 3341. A positioning device is provided between the traction roller group 332 and the guide roller 333 to prevent the water-soluble film from being offset. The correcting assembly 8 includes an L-shaped connecting plate 412, a correcting roller and a displacement sensor. The two ends of the L-shaped connecting plate 412 are fixed to the connecting frame 331, and a mounting hole is opened on the L-shaped connecting plate 412. The correcting roller is rotatably connected to the mounting hole. The displacement sensor is arranged at the bottom end of the L-shaped connecting plate 412, and it is arranged opposite to the correcting roller. The displacement sensor is used to detect the position of the packaging film when it passes through the correcting roller in real time, and the correcting roller is controlled to move left and right after deviation occurs to adjust the lower position of the packaging film to ensure that it always remains in the center position.

[0036] In this embodiment, if Figures 2 to 6 As shown, the heat sealing mechanism 4 includes a back sealing component 41 for heat-pressing and sewing the left and right sides of the packaging film, and a horizontal sealing component 42 for sealing and heat-pressing and sewing the two ends of the packaging film. The back sealing component 41 is vertically arranged on the back side of the discharge barrel, and a pair of hot-melt edge gears 43 for rolling, clamping and fixing the packaging film are arranged just below the bottom end of the back sealing component 41; the hot-melt edge gears 43 are arranged as a group, and a group of hot-melt edge gears 43 are arranged below the bottom end of the back sealing heating clamping plate 411, and the hot-melt edge gears 43 are meshed with each other; the hot-melt edge gears 43 are connected to a rotating shaft for transmission, one end of the rotating shaft extends into the chassis 1 and is connected to a motor for transmission, and the output end of the motor is rotatably connected to the rotating shaft with a transmission gear, and the transmission gears are meshed and rotatably connected to each other, and the rotating shaft is driven by the motor to rotate, thereby synchronously driving a group of hot-melt edge gears 43 to rotate in the opposite direction, so that the hot-melt edge gears 43 are used to clamp and fix the edges of both sides of the packaging film, and the back sealing component 41 is used for hot-pressing and fixing.

[0037] Specifically, such as Figure 2As shown, the back seal assembly 41 includes a back seal heating clamp 411, a connecting plate 412, and a movable support plate 413. The back seal heating clamp 411 is arranged in a group vertically, and the opposite sides of the back seal heating clamp 411 of the group are configured as a striped structure. One side of the connecting plate 412 is fixedly connected to the back seal heating clamp 411, and the other side is connected to the movable support plate 413. The movable support plate 413 extends into the chassis 1 and is connected to a transmission member 414 for driving the back seal heating clamp 411 to move left and right for docking. The transmission member 414 includes a motor and a pulley assembly. The output end of the motor is connected to the movable support plate 413 through the pulley assembly to drive the back seal heating clamp 411 to automatically complete the hot press sealing operation.

[0038] Among them, such as Figure 6 As shown, a transverse sealing assembly 42 is positioned transversely below the discharge barrel, and a cutter assembly 44 for cutting the water-soluble film packaging film is housed within the assembly. The assembly 42 comprises a pair of parallel transverse sealing and heating clamps 421, guide plates 422 positioned on either side of the pair of transverse sealing and heating clamps 421, and guide rods 423 for driving the transverse sealing and heating clamps 421 back and forth. Both ends of the guide plates 422 are sleeved onto the guide rods 423. One end of the guide rod 423 is fixedly connected to a limit plate 424, and the other end is connected to a guide drive assembly 425. The guide drive assembly 425 is driven by a stepper motor and an eccentric cam assembly, so that the transverse sealing and heating clamps 421 automatically return to their original position after completing the sealing of the packaging film, thereby achieving a continuous sealing operation.

[0039] Specifically, a strip groove 4211 is provided in the middle position of the horizontal sealing heating splint 421, and the cutter assembly 44 is fixedly connected in the strip groove 4211; the cutter assembly 44 includes a knife holder and a cutting blade, the knife holder is fixed in the strip groove 4211 on one side, and the cutting blade is fixed on the knife holder, one end of the cutting blade protrudes from the horizontal sealing heating splint 421, and the cutting blade is serrated. After the horizontal sealing heating splint 421 sews the packaging film, the cutting blade simultaneously cuts below the seal, so that the packaging bag is discharged as a single continuous material.

[0040] It is worth mentioning that the chassis 1 is also provided with a temperature control component for controlling the heating temperature of the heat sealing mechanism 4, and the temperature control component is electrically connected to the heat sealing mechanism 4; the temperature control component is used to detect and control the hot pressing temperature of the heat sealing mechanism 4 in real time to avoid deformation of the edge sealing of the water-soluble film due to excessive high temperature, resulting in the problem that it is difficult to dissolve or there is residue after dissolution, thereby improving the packaging effect.

[0041] The working principle of this utility model:

[0042] Before making packaging bags with water-soluble film, the packaging specifications of the materials to be bagged are first confirmed, and then the appropriate water-soluble film material is selected for bag making; then, according to the material sheet and operating parameter settings of the bag making, the heating temperature, heating time, and cutting length and other parameters are adjusted; then the prepared packaging film roll is loaded onto the fixed bracket 31 of the packaging machine, and the packaging film guided on the former 5 is adjusted to its bag size and bag guiding work through the adjustment component 6 to ensure that the packaging film can receive the material according to the feeding process and seal its bottom end, and then the items to be bagged are fed from the automatic measuring instrument in the feeding mechanism 2 into the former 5, and fed into the packaging film through the former 5; finally, the two sides of the packaging film are sewn together by the back sealing component 41 and the transverse sealing component 42, and after completing the sealing of both sides, the top and bottom heat seals are heated and heat sealed to form a sealed packaging bag structure; and after the entire packaging process is completed, the cutter component 44 set in the transverse sealing component 42 is cut at a certain length and queued for output of the whole box.

[0043] To sum up, the present invention sets an adjustment component 6 on one side of the former 5, and uses the bag-making rod 63 to assist in bending and stretching the packaging film, so as to limit the packaging film when it is bagged, so as to prevent deformation and displacement problems that are easy to occur during the bag-making and bag-cutting processes. At the same time, it can also adjust the distance between the stitches on both sides of the packaging film according to production needs, so that it can adjust the sealing position in real time, and then sew out packaging bags of different sizes, thereby realizing continuous bag making of the packaging film and improving packaging efficiency. In addition, the present invention has the advantages of low creation and modification cost, simplicity, easy installation and maintenance, etc., and is suitable for mass production.

[0044] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A water-soluble film back sealing machine, comprising a chassis, a feeding mechanism for quantitatively discharging materials, a bag feeding mechanism for conveying packaging film, and a heat sealing mechanism for hot-pressing and cutting packaging film, which are arranged on the chassis from top to bottom, characterized in that: The discharging port of the unloading mechanism is provided with a former for forming the packaging film into a packaging bag, and an adjusting component for adjusting the size of the packaging film into bags is provided on the back side of the former; the adjusting component includes a mounting bracket, a linear slide plate and a bag-making rod, one end of the mounting bracket is fixedly connected to the top of the chassis, and the other end is fixedly connected to the linear slide; one side of the linear slide plate abuts against the side wall of the former, and a linear slide rail is provided on the linear slide plate along its length direction, and limiting blocks are provided at both ends of the linear slide rail; the bag-making rod is axially symmetrically arranged on both sides of the former, and a clamping groove for clamping and fixing the packaging film is provided on the bag-making rod; a sliding sleeve is provided between the bag-making rod and the linear slide rail, the sliding sleeve is slidably connected to the linear slide rail, and one end of the sliding sleeve is transmission-connected to a driving member, and the driving member is fixed on the mounting bracket.

2. The water-soluble film back sealing machine according to claim 1, characterized in that: The unloading mechanism includes a barrel, a hopper and a vibrator. The barrel is fixedly connected to the top of the chassis, and a plurality of unloading holes are distributed circumferentially on the barrel. The positions of the unloading holes in the hopper are connected to the bottom end of the barrel, and the bottom end of the hopper extends into the former. The vibrator is transmission-connected to the barrel and is used to drive the barrel to vibrate and unload.

3. The water-soluble film back sealing machine according to claim 2, characterized in that: One end of the former is a curved fan-shaped structure, and the other end is a hollow cylindrical structure; and a plurality of restraining belts for guiding and positioning the packaging film are provided on the former, and a gap is formed between the plurality of restraining belts and the former for the packaging film to pass through and be cut into the heat sealing mechanism for sealing.

4. The water-soluble film back sealing machine according to claim 3, characterized in that: The bag feeding mechanism includes a fixed bracket, an unwinding roller arranged on the fixed bracket, and a tensioning adjustment assembly located below the unwinding roller. The fixed bracket is fixed to the top of the chassis, and a driving motor is arranged on the linkage bracket. The output end of the driving motor is connected to the unwinding roller through a pulley assembly. The movable sleeve on the unwinding roller is provided with an adjusting wheel for adjusting the width of the packaging film, and a locking rod is provided on the adjusting wheel.

5. The water-soluble film back sealing machine according to claim 4, characterized in that: The tensioning adjustment assembly includes a connecting frame, a traction roller group, a guide roller and a tensioning roller. One end of the connecting frame is connected to a fixed bracket, and the other end is fixedly connected to the traction roller group. The connecting frame is provided with a slide groove along its length direction. The guide roller and the tensioning roller are slidably connected in the slide groove. A tensioning wheel is provided on the tensioning roller. A correction assembly for positioning to prevent the water-soluble film from being offset is provided between the traction roller group and the guide roller.

6. The water-soluble film back sealing machine according to claim 1, characterized in that: The heat sealing mechanism includes a back sealing assembly for hot-pressing and sewing the left and right sides of the packaging film, and a transverse sealing assembly for hot-pressing and sewing the two ends of the packaging film. The back sealing assembly is vertically arranged on the back side of the discharge barrel, and a pair of hot-melt edge gears for rolling, clamping and fixing the packaging film are arranged just below the bottom end of the back sealing assembly; the transverse sealing assembly is horizontally arranged below the discharge barrel, and a cutter assembly for cutting the water-soluble film packaging film is arranged in the transverse sealing assembly.

7. The water-soluble film back sealing machine according to claim 6, characterized in that: The back seal assembly includes a back seal heating splint, a connecting plate and a movable support plate. The back seal heating splint is vertically arranged in a group, and the opposite sides of the back seal heating splints in one group are arranged as a striped structure; one side of the connecting plate is fixedly connected to the back seal heating splint, and the other side is connected to the movable support plate; the movable support plate extends into the chassis, and the movable support plate is transmission-connected with a transmission part for driving the back seal heating splint to move left and right for docking.

8. The water-soluble film back sealing machine according to claim 7, characterized in that: The transverse sealing assembly includes a stack of parallel transverse sealing heating splints, guide plates arranged on both sides of a pair of transverse sealing heating splints, and guide rods for driving the transverse sealing heating splints to slide back and forth. A strip groove is provided in the middle of the transverse sealing heating splint, and a cutter assembly is fixedly connected to the strip groove; both ends of the guide plate are sleeved on the guide rod; one end of the guide rod is fixedly connected to the limit plate, and the other end is transmission-connected to the guide drive assembly.

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