A fully automatic production line for large liquid bags

Abstract

The application provides a full-automatic production line for large liquid bags, and relates to the technical field of large liquid bag production, which comprises a workbench, a bag sleeving assembly, a film cutting assembly, a heat sealing assembly, a valve mounting assembly and a PP woven cloth sewing assembly are arranged on the workbench; a film placing roller is vertically connected to the workbench; the bag sleeving assembly comprises a PE double-layer film pulling, supporting and unfolding mechanism and a PE double-layer film folding and bag sleeving mechanism; a mold body stirring and gluing assembly is arranged on the PE double-layer film folding and bag sleeving mechanism. The film placing roller axis and the workbench table top are arranged to be perpendicular to each other, so that the PE double-layer cylindrical film is sleeved with the bag under the assistance of gravity, and is separated from the table top during the bag sleeving process, thereby avoiding the situation that the workbench is not clean, the liquid bag production hygiene is not up to standard, the work surface is uneven, the PE double-layer cylindrical film is easily scratched during the bag sleeving process, the liquid bag sealing performance is affected, the liquid bag is easily wrinkled due to the large volume, the liquid bag size precision is affected, and the liquid bag quality is reduced.

Description

Technical Field

[0001] This invention relates to the field of large liquid bag production technology, specifically a fully automated production line for large liquid bags. Background Technology

[0002] Large liquid bags are typically containers made of multiple layers of cylindrical PE film and PP woven fabric. They are generally used for transporting liquid materials. A valve is usually installed at the seal of the liquid bag for feeding and discharging liquid materials. The valve consists of two parts: a valve seat and a valve body. The valve seat is inside the liquid bag, and the valve body is outside the liquid bag. The valve seat and valve body are sealed to the main body of the liquid bag by the cooperation of flanges and bolts on them.

[0003] The production process of large liquid bags typically includes:

[0004] Material cutting—Cut the double-layer PE tubular film to the target length as needed;

[0005] Bagging—According to the drawing requirements, 2, 3 or 4 layers of PE double-layer tubular membrane are nested together (by setting multiple layers of PE double-layer tubular membrane, we can prevent damage to one layer of PE double-layer tubular membrane, which would cause leakage of the liquid inside).

[0006] Valve installation --- After the liquid bag is sealed, it becomes a closed container, which requires the installation of a valve for loading and unloading liquid;

[0007] Heat sealing—The openings at both ends of the PE double-layer cylindrical film are heat sealed, that is, the edges of multiple layers of PE double-layer cylindrical film are heat sealed together to form a sealed cavity under certain temperature, time and pressure.

[0008] The double-layer PE tubular membrane is not strong enough, so a high-strength PP woven fabric needs to be attached to the outer layer. This fabric is made of PP filaments and then woven. It cannot be connected to the PE membrane by heat sealing, so it can only be sewn together. The sewing thread falls outside the heat sealing line to ensure that the sewing process will not damage the sealing structure of the liquid bag.

[0009] Currently, the production of large liquid bags is usually a combination of manual and machine processing, mainly due to the following reasons:

[0010] 1. Due to the large volume of the liquid bags and the complicated bagging process, machine processing requires a large area.

[0011] 2. When using a machine for bagging, the double-layer PE tubular film needs to be laid flat on the workbench. This method of bagging has the following drawbacks:

[0012] (1) If the workbench is not clean, it is easy to cause the hygiene of liquid bag production to fail to meet the standards;

[0013] (2) If the working surface is not flat, the double-layer PE tubular membrane can be easily scratched during the bagging process, affecting the sealing performance of the liquid bag;

[0014] (3) Laying the liquid bag flat can easily cause wrinkles due to its large volume, which affects the dimensional accuracy of the liquid bag and reduces the quality of the liquid bag leaving the factory.

[0015] Therefore, this invention provides a fully automated production line for large liquid bags. Summary of the Invention

[0016] This invention provides a fully automated production line for large liquid bags, addressing at least one of the technical problems mentioned above: large footprint required for machine processing; unsanitary conditions during production if the workbench is not clean; uneven work surfaces easily scratching the double-layer PE tubular film during bagging, affecting the sealing performance of the liquid bag; and large volume of the liquid bag when laid flat, easily causing wrinkles that affect dimensional accuracy and reduce the quality of the finished product.

[0017] To solve the above-mentioned technical problems, the present invention discloses a fully automatic production line for large liquid bags, including a workbench, a bag-making and film-cutting area, a liquid bag sealing area and a liquid bag sewing area. The bag-making and film-cutting area is equipped with a bag-making assembly and a film-cutting assembly. The liquid bag sealing area is equipped with a heat-sealing assembly. The liquid bag sewing area is equipped with a PP woven fabric sewing assembly and a valve installation assembly.

[0018] A film feeding roller is rotatably connected to the worktable. The axis of the film feeding roller is perpendicular to the worktable surface. A double-layer PE cylindrical film is sleeved on the film feeding roller. The bagging assembly includes a double-layer PE film pulling and stretching mechanism and a double-layer PE film folding and bagging mechanism. A mold body pushing and gluing assembly is provided on the double-layer PE film folding and bagging mechanism. The film cutting assembly is located between the double-layer PE film pulling and stretching mechanism and the double-layer PE film folding and bagging mechanism.

[0019] Preferably, the PE double-layer film pulling and stretching mechanism includes a first mounting plate, which is fixedly connected to the worktable. An electric lifting screw is rotatably connected to the first mounting plate, and a lifting nut is threaded onto the electric lifting screw. A roller mounting plate is fixedly connected to the lifting nut. The end of the film-releasing roller away from the worktable is rotatably connected to the roller mounting plate. A first screw is rotatably connected to the roller mounting plate, and a pulling and stretching body is threaded onto the first screw.

[0020] Preferably, it further includes a drive motor, a first rotating shaft, and a second rotating shaft. The drive motor is fixedly connected to the roller mounting plate. The first rotating shaft is fixedly connected to the output end of the drive motor. A first gear and a first bevel gear are fixedly connected to the first rotating shaft. A second gear is fixedly connected to the first lead screw. The first gear and the second gear mesh with each other. The second rotating shaft is fixedly connected to the film feeding roller. A second bevel gear is slidably connected to the second rotating shaft. The second bevel gear is used to mesh with the first bevel gear. A first electromagnet is fixedly connected to the second bevel gear. A second electromagnet is fixedly connected to the roller mounting plate. A compression elastic element is sleeved on the second rotating shaft.

[0021] Preferably, the pulling and supporting body includes a nut ring, which is threadedly connected to a first lead screw. A carrier is threadedly connected to the nut ring, and a clamping plate is slidably connected to the carrier. A fixed shaft is fixedly connected inside the carrier, and two cross-arranged supporting rods are rotatably connected to the fixed shaft.

[0022] Preferably, the PE double-layer film folding bagging mechanism includes a second mounting plate, which is fixedly connected to the worktable. A Z-shaped guide rod is fixedly connected to the second mounting plate. The mold body actuation glue application assembly is slidably connected to the Z-shaped guide rod. A disc body adjustment column is slidably connected to the Z-shaped guide rod. An electric strip plate is rotatably connected to the end of the disc body adjustment column away from the Z-shaped guide rod. A fixed support rod is fixedly connected to the electric strip plate. A second lead screw is rotatably connected inside the electric strip plate. An adjusting support rod is threadedly connected to the second lead screw. An electric folding auxiliary plate is slidably connected up and down on the adjusting support rod.

[0023] Preferably, the disc adjustment column includes an electric sleeve, which is slidably connected to the Z-shaped guide rod. An electric strip height adjustment rod is slidably connected inside the electric sleeve, and the electric strip is rotatably connected to the electric strip height adjustment rod. A first transmission belt is provided directly below the electric folding auxiliary plate on the worktable.

[0024] Preferably, the film cutting assembly includes a vertical slide rail, a mounting slider is slidably connected to the vertical slide rail, a third lead screw is rotatably connected to the mounting slider, a horizontal adjusting ring is threaded onto the third lead screw, and a first laser cutter is fixedly connected to the horizontal adjusting ring.

[0025] Preferably, the heat sealing assembly includes an edge heat sealing machine and a second conveyor belt, the second conveyor belt being installed in the liquid bag sealing area of ​​the workbench, and the valve installation assembly includes an intelligent valve installation robot.

[0026] Preferably, the PP woven fabric sewing assembly includes a steering platform guide rail, two symmetrically arranged strip transmission belts, and a sewing assembly body. A steering platform is slidably connected inside the steering platform guide rail, and the strip transmission belts are disposed between the steering platform and the sewing assembly body.

[0027] Preferably, the sewing assembly body includes a first PP woven fabric roller, a second PP woven fabric roller, and an intermediate roller rotatably connected to the worktable. The PP woven fabric is wound around the first PP woven fabric roller and then wound across the intermediate roller onto the second PP woven fabric roller. A sewing needle body in the width direction is installed on the worktable, and automatic pressing blocks are installed on both sides of the sewing needle body in the width direction. A first take-up roller and a second take-up roller are rotatably connected inside the worktable.

[0028] The workbench is equipped with two sets of sewing tables along the length direction. A sewing needle and a second laser cutter are slidably connected to the sewing tables along the length direction. The valve installation assembly includes an intelligent valve installation robot, which is placed between the two sets of sewing tables along the length direction.

[0029] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. In the bagging process, the mold moves the glue application component to apply glue to the PE double-layer tubular film, which can play a role in positioning adjacent PE double-layer tubular films, avoiding misalignment between the two during the subsequent bagging process, which would lead to insufficient production precision of the liquid bag. By lifting the PE double-layer tubular film instead of laying it on the working surface, the PE double-layer tubular film will automatically flatten itself due to gravity during the lifting process, effectively avoiding the problem of wrinkles caused during the flattening process.

[0032] 2. By arranging the film-feeding roller axis perpendicular to the workbench surface, the double-layer PE tubular film is bagged under the assistance of gravity. During the bagging process, it is detached from the workbench, thus avoiding the situation where the workbench is not clean, resulting in substandard hygiene in liquid bag production, uneven working surface, and easy scratching of the double-layer PE tubular film during the bagging process, which would affect the sealing performance of the liquid bag. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This is a top view of the overall structure of the present invention;

[0035] Figure 2 Side view of the overall structure of the present invention;

[0036] Figure 3 For the present invention Figure 2 A magnified structural diagram of region B in the diagram;

[0037] Figure 4 This is a schematic diagram of the main structure of the pull-out support of the present invention;

[0038] Figure 5 For the present invention Figure 4 Sectional view at point C;

[0039] Figure 6 This is a schematic diagram of the disc body adjustment column structure of the present invention;

[0040] Figure 7 For the present invention Figure 2 A schematic diagram of the magnified structure of the DD region in the diagram;

[0041] Figure 8 This is a schematic diagram of the PP woven fabric sewing assembly structure of the present invention.

[0042] In the diagram: 1. Workbench; 100. Bag-cutting area; 101. Liquid bag sealing area; 102. Liquid bag sewing area; 103. Film feeding roller; 104. PE double-layer cylindrical film; 2. PE double-layer film pulling and spreading mechanism; 200. First mounting plate; 2000. Electric lifting screw; 2001. Lifting nut; 2002. Roller mounting plate; 2003. First screw; 2004. Drive motor; 2005. First rotating shaft; 2006. Second rotating shaft; 2007. First gear; 20 08. Second gear; 2009. First bevel gear; 201. Second bevel gear; 2010. First electromagnet; 2011. Second electromagnet; 2012. Compression elastic element; 202. Pulling and extending main body; 2020. Carrier; 2021. Clamping plate; 2022. Fixed shaft; 2023. Extending connecting rod; 2024. Nut ring; 3. PE double-layer film folding and bagging mechanism; 300. Mold body actuating glue application assembly; 3000. Second mounting plate; 3001. Z-shaped guide rod; 3 002, Electric strip plate; 3003, Fixed support rod; 3004, Second lead screw; 3005, Adjustable support rod; 3006, Electric folding auxiliary plate; 301, Disc adjustment column; 3010, Electric sleeve; 3011, Electric strip plate height adjustment rod; 3012, First transmission belt; 4, Film cutting assembly; 400, Vertical slide rail; 401, Mounting slider; 402, Third lead screw; 403, Horizontal adjustment ring; 404, First laser cutter; 5, Edge heat sealing machine; 500, Second transmission... 501. Belt feeding; 6. Intelligent valve installation robot; 7. Turning platform guide rail; 8. Turning platform; 9. Strip transmission belt; 10. Second PP woven fabric roller; 11. Intermediate roller; 12. PP woven fabric; 13. Sewing needle body in the width direction; 14. Automatic pressing block; 15. First take-up roller; 16. Second take-up roller; 17. First PP woven fabric roller; 18. Sewing table in the length direction; 19. Sewing needle body in the length direction; 20. Second laser cutter. Detailed Implementation

[0043] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0044] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0045] The present invention provides the following embodiments.

[0046] Example 1

[0047] This invention provides a fully automated production line for large liquid bags, such as... Figure 1-8 As shown, the system includes a workbench 1, which is provided with a bagging and film cutting area 100, a liquid bag sealing area 101, and a liquid bag sewing area 102. The bagging and film cutting area 100 is provided with a bagging assembly and a film cutting assembly 4. The liquid bag sealing area 101 is provided with a heat sealing assembly and a valve installation assembly. The liquid bag sewing area 102 is provided with a PP woven fabric sewing assembly.

[0048] A film feeding roller 103 is rotatably connected to the workbench 1. The axis of the film feeding roller 103 is perpendicular to the workbench 1 surface. A double-layer PE cylindrical film 104 is sleeved on the film feeding roller 103. The bagging assembly includes a double-layer PE film pulling and stretching mechanism 2 and a double-layer PE film folding and bagging mechanism 3. The double-layer PE film folding and bagging mechanism 3 is equipped with a mold body pushing and gluing assembly 300. The film cutting assembly 4 is arranged between the double-layer PE film pulling and stretching mechanism 2 and the double-layer PE film folding and bagging mechanism 3.

[0049] The working principle and beneficial effects of the above technical solution are as follows: In use, the PE double-layer film pulling and stretching mechanism 2 clamps the end of the PE double-layer tubular film 104 away from the film feeding roller 103, and then drags the PE double-layer tubular film 104 to the right to the right limit position of the PE double-layer film pulling and stretching mechanism 2. At this time, the front end of the PE double-layer tubular film 104, that is, the rightmost side of the PE double-layer tubular film 104, is fitted onto the PE double-layer film folding and bagging mechanism 3. Then, the mold body moves the glue coating component 300 down to contact the front end of the PE double-layer tubular film 104. Then, the mold body moves the glue coating component 300 to the right, driving the PE double-layer tubular film 104 to the right. When the PE double-layer tubular film 104 moves to the right to the target length, the film cutting component 4 is started to cut the PE double-layer tubular film 104 from top to bottom. After the cutting is completed, the first layer of the PE double-layer tubular film 104 is fitted onto the PE double-layer film folding and bagging mechanism 3.

[0050] Then, the PE double-layer film pulling and stretching mechanism 2 clamps the end of the PE double-layer cylindrical film 104 away from the film-releasing roller 103 again, and drags the front end of the PE double-layer cylindrical film 104 to the... Figure 2As shown, the front end of the PE double-layer tubular film 104 is aligned with the film cutting assembly 4. Then, the PE double-layer film stretching mechanism 2 expands the front end of the PE double-layer tubular film 104. Simultaneously, the PE double-layer film folding and bagging mechanism 3 lifts the bottom of the first layer of the PE double-layer tubular film 104 upwards, causing it to fold longitudinally. At the same time, the mold body moves the adhesive application assembly 300 to apply adhesive to the outside of the first layer of the PE double-layer tubular film 104. Then, the PE double-layer film folding and bagging mechanism 3 moves the first layer of the PE double-layer tubular film 104 to the left, allowing it to enter the PE double-layer tubular film 104 expanded by the PE double-layer film stretching mechanism 2. Afterward, the PE double-layer film folding and bagging mechanism 3 expands the folded first layer of the PE double-layer tubular film 104, causing the outside of the first layer of the PE double-layer tubular film 104 to adhere to the inner wall of its outer side. This is referred to as the first layer... The outermost layer of the PE double-layer tubular film 104 is the second layer of the PE double-layer tubular film 104. After the PE double-layer film folding and bagging mechanism 3 drives the first and second layers of the PE double-layer tubular film 104 to move to the right by the target length, the PE double-layer tubular film 104 is cut by the film cutting component 4, thus completing the bagging process of the PE double-layer tubular film 104. During the bagging process, the mold body moves the glue application component 300 to apply glue to the PE double-layer tubular film 104, which can play a role in positioning adjacent PE double-layer tubular films 104, avoiding misalignment between the two in the subsequent bagging process, which would lead to insufficient production precision of the liquid bag. The PE double-layer tubular film 104 is lifted instead of laid on the working surface. During the lifting process, the PE double-layer tubular film 104 will automatically flatten due to gravity, effectively avoiding the problem of wrinkles during the flattening process.

[0051] After bagging is completed, the PE double-layer film folding bagging mechanism 3 places the bagged PE double-layer tubular film 104 on the workbench 1. The workbench 1 then transfers the PE double-layer tubular film 104 to the liquid bag sealing area 101, where the liquid bag sealing area 101 seals one opening of the PE double-layer tubular film 104 to form a preliminary liquid bag.

[0052] The initial liquid bag is transferred to the liquid bag sewing area 102. A layer of PP woven fabric is placed on the outside of the initial liquid bag. The PP woven fabric is sewn onto the initial liquid bag to form the final liquid bag. The valve is then installed on the liquid bag.

[0053] This invention employs a method where the axis of the film-dispensing roller 103 is arranged perpendicularly to the surface of the workbench 1, allowing the double-layer PE tubular film 104 to complete the bagging process with the assistance of gravity. During the bagging process, the film detaches from the workbench, thus avoiding situations where the workbench is unclean, resulting in substandard hygiene in liquid bag production, uneven work surfaces, and easy scratches on the double-layer PE tubular film during bagging, affecting the sealing performance of the liquid bag, and the large volume of the liquid bag easily causing wrinkles, affecting the dimensional accuracy of the liquid bag, and reducing the quality of the liquid bag leaving the factory.

[0054] Example 2

[0055] Based on Embodiment 1, the PE double-layer film pulling and stretching mechanism 2 includes a first mounting plate 200, which is fixedly connected to the workbench 1. An electric lifting screw 2000 is rotatably connected to the first mounting plate 200, and a lifting nut 2001 is threadedly connected to the electric lifting screw 2000. A roller mounting plate 2002 is fixedly connected to the lifting nut 2001. One end of the film-dispensing roller 103 away from the workbench 1 is rotatably connected to the roller mounting plate 2002. A first screw 2003 is rotatably connected to the roller mounting plate 2002, and a pulling and stretching body 202 is threadedly connected to the first screw 2003.

[0056] It also includes a drive motor 2004, a first rotating shaft 2005 and a second rotating shaft 2006. The drive motor 2004 is fixedly connected to the roller mounting plate 2002. The first rotating shaft 2005 is fixedly connected to the output end of the drive motor 2004. A first gear 2007 and a first bevel gear 2009 are fixedly connected to the first rotating shaft 2005. A second gear 2008 is fixedly connected to the first lead screw 2003. The first gear 2007 and the second gear 2008 mesh with each other. The second rotating shaft 2006 is fixedly connected to the film feeding roller 103. A second bevel gear 201 is connected to the second rotating shaft 2006 via a sliding key. The second bevel gear 201 is used to mesh with the first bevel gear 2009. A first electromagnet 2010 is fixedly connected to the second bevel gear 201. A second electromagnet 2011 is fixedly connected to the roller mounting plate 2002. A compression elastic element 2012 is sleeved on the second rotating shaft 2006.

[0057] The working principle and beneficial effects of the above technical solution are as follows: When the PE double-layer cylindrical film 104 is installed on the film feeding roller 103, the electric lifting screw 2000 rotates and drives the lifting nut 2001 to move upward, thereby causing the roller mounting plate 2002 to move away from the film feeding roller 103. When the roller mounting plate 2002 is a certain distance from the film feeding roller 103, the PE double-layer cylindrical film 104 is placed on the film feeding roller 103. Then the roller mounting plate 2002 descends to the initial position, completing the installation of the PE double-layer cylindrical film 104.

[0058] When the stretching body 202 is pulled to move the PE double-layer cylindrical film 104, the drive motor 2004 drives the first rotating shaft 2005 to rotate, the first rotating shaft 2005 drives the first gear 2007 to rotate, the first gear 2007 drives the second gear 2008 to rotate, the second gear 2008 drives the first lead screw 2003 to rotate, and the rotation of the first lead screw 2003 causes the stretching body 202 to move left and right along the first lead screw 2003, thereby achieving the effect of moving the PE double-layer cylindrical film 104.

[0059] When a new PE double-layer tubular film 104 is installed, because the roll of PE double-layer tubular film 104 is large, simply pulling the stretching body 202 to unfold the PE double-layer tubular film 104 will deform the PE double-layer tubular film 104. In order to ensure that the PE double-layer tubular film 104 does not deform, the first electromagnet 2010 and the second electromagnet 2011 can be de-energized. At this time, the second bevel gear 201 and the first bevel gear 2009 mesh with each other. When the first lead screw 2003 drives the stretching body 202 to move left and right, the first bevel gear 2009 drives the second bevel gear 201 to rotate. The second bevel gear 201 drives the film feeding roller 103 to rotate. The rotation of the film feeding roller 103 drives the PE double-layer tubular film 104 on it to rotate, thereby assisting the stretching body 202 in realizing the film pulling action.

[0060] Example 3

[0061] Based on Embodiment 2, the pull-out support body 202 includes a nut ring 2024, which is threadedly connected to the first lead screw 2003. A carrier 2020 is threadedly connected to the nut ring 2024. A clamping plate 2021 is slidably connected to the carrier 2020. A fixed shaft 2022 is fixedly connected inside the carrier 2020. Two cross-arranged support rods 2023 are rotatably connected to the fixed shaft 2022.

[0062] The working principle and beneficial effects of the above technical solution are as follows: When the PE double-layer tubular film 104 is pulled to the right, the carrier 2020 extends into the PE double-layer tubular film 104, and the clamping plate 2021 is located outside the PE double-layer tubular film 104. Then the clamping plate 2021 moves downward so that the PE double-layer tubular film 104 is clamped by the pulling and stretching body 202, and moves to the right with the pulling and stretching body 202. When bagging, the PE double-layer tubular film 104 needs to be stretched open. At this time, the two stretching connecting rods 2023 rotate, thereby stretching the PE double-layer tubular film 104 open, making it easier for the first layer of PE double-layer tubular film 104 to be stretched open and put into the second layer of PE double-layer tubular film 104.

[0063] Example 4

[0064] Based on Example 1, the PE double-layer film folding bagging mechanism 3 includes a second mounting plate 3000, which is fixedly connected to the workbench 1. A Z-shaped guide rod 3001 is fixedly connected to the second mounting plate 3000. A mold body actuating glue application assembly 300 is slidably connected to the Z-shaped guide rod 3001. A disc body adjusting column 301 is slidably connected to the Z-shaped guide rod 3001. An electric strip plate 3002 is rotatably connected to one end of the disc body adjusting column 301 away from the Z-shaped guide rod 3001. A fixed support rod 3003 is fixedly connected to the electric strip plate 3002. A second lead screw 3004 is rotatably connected inside the electric strip plate 3002. An adjusting support rod 3005 is threadedly connected to the second lead screw 3004. An electric folding auxiliary plate 3006 is slidably connected up and down to the adjusting support rod 3005.

[0065] The disc adjustment column 301 includes an electric sleeve 3010, which is slidably connected to the Z-shaped guide rod 3001. An electric strip height adjustment rod 3011 is slidably connected up and down inside the electric sleeve 3010. An electric strip 3002 is rotatably connected to the electric strip height adjustment rod 3011. A first transmission belt 3012 is provided directly below the electric folding auxiliary plate 3006 on the workbench 1.

[0066] The working principle and beneficial effects of the above technical solution are as follows: When bagging, the electric sleeve 3010 slides left and right along the Z-shaped guide rod 3001. When it is necessary to open the PE double-layer tubular film 104, the second screw 3004 rotates to drive the adjusting support rod 3005 to move downward. When it is necessary to fold the PE double-layer tubular film 104 upward, the second screw 3004 rotates to drive the adjusting support rod 3005 to move upward. At the same time, the electric folding auxiliary plate 3006 also moves upward, lifting the bottom of the PE double-layer tubular film 104 upward. Then, the electric sleeve 3010 slides to the left along the Z-shaped guide rod 3001 to insert the PE double-layer tubular film 104 into the opened PE double-layer tubular film 104, thus completing the bagging.

[0067] After bagging is completed, the electric strip plate 3002 rotates 90 degrees, and at the same time, the electric strip plate height adjustment rod 3011 slides down to place the bagged PE double-layer cylindrical film 104 on the first transmission belt 3012. Then, the disc adjustment column 301 moves to the right, causing the fixed support rod 3003 and the adjusting support rod 3005 to be withdrawn from the PE double-layer cylindrical film 104. After that, the first transmission belt 3012 conveys the bagged PE double-layer cylindrical film 104 to the liquid bag sealing area 101.

[0068] Example 5

[0069] Based on embodiment 4, the film cutting assembly 4 includes a vertical slide rail 400, a mounting slider 401 that slides up and down in the vertical slide rail 400, a third lead screw 402 that is rotatably connected to the mounting slider 401, a horizontal adjusting ring 403 that is threaded onto the third lead screw 402, and a first laser cutter 404 that is fixedly connected to the horizontal adjusting ring 403.

[0070] The working principle and beneficial effects of the above technical solution are as follows: When cutting the PE double-layer tubular film 104, the third lead screw 402 rotates and drives the horizontal adjusting ring 403 to move towards the PE double-layer tubular film 104 to a preset distance. Then, the mounting slider 401 slides down the vertical slide rail 400 from top to bottom. At the same time, the first laser cutter 404 is started to complete the cutting of the PE double-layer tubular film 104.

[0071] Example 6

[0072] Based on Embodiment 1, the heat sealing assembly includes an edge heat sealing machine 5 and a second conveyor belt 500, which is installed in the liquid bag sealing area 101 of the workbench 1.

[0073] The working principle and beneficial effects of the above technical solution are as follows: The first conveyor belt 3012 conveys the bagged PE double-layer tubular film 104 to the second conveyor belt 500. The second conveyor belt 500 conveys the PE double-layer tubular film 104. During the conveying process, one edge of the PE double-layer tubular film 104 passes through the edge heat sealing machine 5. The edge is heat sealed by the edge heat sealing machine 5. Then, the second conveyor belt 500 transmits a preliminary liquid bag after edge heat sealing to the liquid bag sewing area 102.

[0074] Example 7

[0075] Based on Example 1, the PP woven fabric sewing assembly includes a steering table guide rail 6, two symmetrically arranged strip transmission belts 601 and a sewing assembly body. A steering table 600 is slidably connected inside the steering table guide rail 6, and the strip transmission belts 601 are disposed between the steering table 600 and the sewing assembly body.

[0076] The sewing assembly body includes a first PP woven fabric roller 609, a second PP woven fabric roller 602 and an intermediate roller 603 rotatably connected to the worktable 1. PP woven fabric 604 is wound around the first PP woven fabric roller 609 and across the intermediate roller 603 to be wound around the second PP woven fabric roller 602. A width-direction sewing needle body 605 is installed on the worktable 1. Automatic pressing blocks 606 are installed on both sides of the width-direction sewing needle body 605. A first take-up roller 607 and a second take-up roller 608 are rotatably connected inside the worktable 1.

[0077] The workbench 1 is provided with two sets of length-direction sewing tables 610. A length-direction sewing needle body 611 and a second laser cutter 612 are slidably connected on the length-direction sewing tables 610. The valve installation assembly includes an intelligent valve installation robot 501, which is placed between the two sets of length-direction sewing tables 610.

[0078] The working principle and beneficial effects of the above technical solution are as follows: The second conveyor belt 500 transmits the initial liquid bag to the turning table 600. Then the turning table 600 rotates 90 degrees, which simultaneously drives the initial liquid bag to turn. The seals on both sides change from left-right symmetry to front-back symmetry. Then the turning table guide rail 6 drives the turning table 600 to move to the right, thereby transmitting the initial liquid bag to the strip transmission belt 601. The strip transmission belt 601 transmits the initial liquid bag to the PP woven fabric 604.

[0079] In this process, the PP woven fabric 604 forms a "V" shape through the combined action of the first PP woven fabric roller 609, the second PP woven fabric roller 602, and the intermediate roller 603. The initial liquid bag is fed into this "V" shape and then fed under the width-direction sewing needles 605 on both sides. The width-direction sewing needles 605 sew the PP woven fabric 604 onto the initial liquid bag. During the sewing process, the automatic pressing block 606 can tightly press the upper and lower layers of PP woven fabric 604 and the initial liquid bag together, thereby ensuring the sewing quality of the width-direction sewing needles 605. After sewing, the liquid bag is wound around the second take-up roller 608 by the first take-up roller 607. When the second take-up roller 608 has finished winding, the liquid bag roll on the second take-up roller 608 is pulled out and conveyed to the area under the length-direction sewing needle 611 (e.g., ...). Figure 8 As shown by the dashed line (the dashed line represents the pulled-out liquid bag roll), the upper and lower layers of PP woven fabric in the length direction of the liquid bag are sewn together by two sewing needles 611. Then, the second laser cutter 612 cuts along the outside of the sewing line. At the same time, the intelligent valve installation robot 501 installs the valve at another edge of the PE double-layer cylindrical membrane 104 and heat-seals the other edge, thus completing the fully automated production of the liquid bag.

[0080] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A fully automated production line for large liquid bags, characterized in that: Includes a workbench (1), on which are provided a bagging and film cutting area (100), a liquid bag sealing area (101) and a liquid bag sewing area (102). The bagging and film cutting area (100) is provided with a bagging assembly and a film cutting assembly (4). The liquid bag sealing area (101) is provided with a heat sealing assembly. The liquid bag sewing area (102) is provided with a PP woven fabric sewing assembly and a valve installation assembly. A film feeding roller (103) is rotatably connected to the workbench (1). The axis of the film feeding roller (103) is perpendicular to the workbench (1) surface. A double-layer PE cylindrical film (104) is sleeved on the film feeding roller (103). The bagging assembly includes a double-layer PE film pulling and stretching mechanism (2) and a double-layer PE film folding and bagging mechanism (3). A mold body pushing and gluing assembly (300) is provided on the double-layer PE film folding and bagging mechanism (3). The film cutting assembly (4) is set between the double-layer PE film pulling and stretching mechanism (2) and the double-layer PE film folding and bagging mechanism (3). The PE double-layer film pulling and stretching mechanism (2) includes a first mounting plate (200), which is fixedly connected to the worktable (1). An electric lifting screw (2000) is rotatably connected to the first mounting plate (200), and a lifting nut (2001) is threadedly connected to the electric lifting screw (2000). A roller mounting plate (2002) is fixedly connected to the lifting nut (2001). The end of the film-releasing roller (103) away from the worktable (1) is rotatably connected to the roller mounting plate (2002). A first screw (2003) is rotatably connected to the roller mounting plate (2002), and a pulling and stretching body (202) is threadedly connected to the first screw (2003). It also includes a drive motor (2004), a first rotating shaft (2005), and a second rotating shaft (2006). The drive motor (2004) is fixedly connected to the roller mounting plate (2002). The first rotating shaft (2005) is fixedly connected to the output end of the drive motor (2004). A first gear (2007) and a first bevel gear (2009) are fixedly connected to the first rotating shaft (2005). A second gear (2008) is fixedly connected to the first lead screw (2003). The first gear (2007) and the second gear... (2008) mesh with each other, the second rotating shaft (2006) is fixedly connected to the film feeding roller (103), the second rotating shaft (2006) is connected to the second bevel gear (201) by a sliding key, the second bevel gear (201) is used to mesh with the first bevel gear (2009), the second bevel gear (2010) is fixedly connected to the second bevel gear (201), the roller mounting plate (2002) is fixedly connected to the second electromagnet (2011), and the second rotating shaft (2006) is fitted with a compression elastic element (2012). The main body for pulling and extending (202) includes a nut ring (2024), which is threadedly connected to the first lead screw (2003). A carrier (2020) is threadedly connected to the nut ring (2024). A clamping plate (2021) is slidably connected to the carrier (2020). A fixed shaft (2022) is fixedly connected inside the carrier (2020). Two cross-arranged extension connecting rods (2023) are rotatably connected to the fixed shaft (2022).

2. The fully automated production line for large liquid bags according to claim 1, characterized in that: The PE double-layer film folding bagging mechanism (3) includes a second mounting plate (3000), which is fixedly connected to the workbench (1). A Z-shaped guide rod (3001) is fixedly connected to the second mounting plate (3000). The mold body actuating glue application component (300) is slidably connected to the Z-shaped guide rod (3001). A disc body adjusting column (301) is rotatably connected to the end of the disc body adjusting column (301) away from the Z-shaped guide rod (3001). A motorized strip plate (3002) is rotatably connected to the end of the motorized strip plate (3002). A fixed support rod (3003) is fixedly connected to the motorized strip plate (3002). A second lead screw (3004) is rotatably connected inside the motorized strip plate (3002). An adjusting support rod (3005) is threadedly connected to the second lead screw (3004). An electric folding auxiliary plate (3006) is slidably connected up and down to the adjusting support rod (3005).

3. The fully automated production line for large liquid bags according to claim 2, characterized in that: The disc adjustment column (301) includes an electric sleeve (3010), which is slidably connected to the Z-shaped guide rod (3001). An electric strip height adjustment rod (3011) is slidably connected inside the electric sleeve (3010). An electric strip (3002) is rotatably connected to the electric strip height adjustment rod (3011). A first transmission belt (3012) is provided directly below the electric folding auxiliary plate (3006) on the worktable (1).

4. A fully automated production line for large liquid bags according to claim 3, characterized in that: The film cutting assembly (4) includes a vertical slide rail (400), a mounting slider (401) is slidably connected to the vertical slide rail (400), a third lead screw (402) is rotatably connected to the mounting slider (401), a horizontal adjusting ring (403) is threadedly connected to the third lead screw (402), and a first laser cutter (404) is fixedly connected to the horizontal adjusting ring (403).

5. A fully automated production line for large liquid bags according to claim 1, characterized in that: The heat sealing assembly includes an edge heat sealer (5) and a second conveyor belt (500), which is installed in the liquid bag sealing area (101) of the workbench (1).

6. A fully automated production line for large liquid bags according to claim 1, characterized in that: The PP woven fabric sewing assembly includes a steering platform guide rail (6), two symmetrically arranged strip transmission belts (601) and a sewing assembly body. A steering platform (600) is slidably connected inside the steering platform guide rail (6), and the strip transmission belts (601) are arranged between the steering platform (600) and the sewing assembly body.

7. A fully automated production line for large liquid bags according to claim 6, characterized in that: The sewing assembly body includes a first PP woven fabric roller (609), a second PP woven fabric roller (602), and an intermediate roller (603) rotatably connected to the worktable (1). PP woven fabric (604) is wound around the first PP woven fabric roller (609) and passes over the intermediate roller (603) to be wound around the second PP woven fabric roller (602). A width-direction sewing needle body (605) is installed on the worktable (1). Automatic pressing blocks (606) are installed on both sides of the width-direction sewing needle body (605). A first take-up roller (607) and a second take-up roller (608) are rotatably connected inside the worktable (1). The workbench (1) is provided with two sets of length direction sewing tables (610), and a length direction sewing needle body (611) and a second laser cutter (612) are slidably connected on the length direction sewing table (610). The valve installation assembly includes an intelligent valve installation robot (501), which is placed between the two sets of length direction sewing tables (610).

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