Laminating device for woven bag production

Abstract

The utility model provides a film laminating device for woven bag production, which comprises a group of vertical plates, a group of sleeve rollers mounted on one side of the group of vertical plates, a heating roller mounted between the group of vertical plates, a supporting roller mounted between the group of vertical plates and positioned below the heating roller, and a guide roller mounted between the group of vertical plates and flush with the bottom end of the heating roller, the guiding device is used for guiding plastic films; and the flattening assembly comprises two groups of U-shaped frames arranged between the group of vertical plates and a group of flattening rollers rotationally connected to the inner walls of each group of U-shaped frames. Through the arranged flattening assembly, when a plastic film is wrinkled in the conveying process, a flattening roller can pull the two side edges of the plastic film to extend outwards so that the plastic film can be fully unfolded, and the plastic film can be in a flattened state when passing through a gap between a heating roller and a supporting roller; therefore, the phenomena of bubbles, hollowing and the like when the plastic film is softened and attached to the woven bag are avoided, and the flatness of the film is further improved.

Description

Technical Field

[0001] This utility model relates to the field of woven bag coating technology, and in particular to a woven bag production coating device. Background Technology

[0002] Woven bags are a widely used packaging material in agriculture, industry, logistics and other fields. They are favored for their low cost, high strength and reusability. In the production process of woven bags, the lamination process is a key link to improve their performance and quality. By covering the surface of the woven bag with a layer of plastic film, the waterproofness, moisture resistance, wear resistance and printability of the woven bag can be significantly enhanced, and its service life can be extended.

[0003] Current laminating equipment typically employs a method of synchronously conveying plastic film and woven bags. During conveying, a heating device is used to heat the plastic film, softening it and allowing it to adhere to the surface of the woven bag, thus completing the laminating process. Existing unwinding and conveying mechanisms mostly use a single drive roller to provide tension, resulting in a difference in tension between the two sides and the middle of the plastic film. This causes wrinkles to accumulate in the middle area due to insufficient force. At the same time, the plastic film itself has a certain degree of flexibility, and during high-speed conveying, air resistance and inertia will exacerbate the deformation in the middle section. In the subsequent heating and pressing process, this can lead to the plastic film not adhering tightly to the surface of the woven bag, resulting in bubbles, voids, and other phenomena, which seriously affect the flatness of the lamination. To address this, we provide a laminating device for woven bag production. Utility Model Content

[0004] This utility model provides a woven bag production laminating device that can flatten the wrinkled plastic film in the middle part during the conveying process, thereby ensuring that the plastic film is tightly bonded to the surface of the woven bag in the subsequent heating and pressing process, preventing the occurrence of bubbles, voids and other phenomena, and further improving the flatness of the lamination.

[0005] The purpose and effect of this utility model of a woven bag production laminating device are achieved by the following specific technical means: A woven bag production laminating device includes a set of upright plates, a set of rollers installed on one side of the set of upright plates, heating rollers installed between the set of upright plates, and supporting rollers installed between the set of upright plates and located below the heating rollers, and further includes:

[0006] The guide roller, installed between a set of vertical plates and flush with the bottom of the heating roller, is used to guide the plastic film;

[0007] The flattening assembly is mounted on a set of uprights and includes two sets of U-shaped frames between the uprights, a set of flattening rollers rotatably connected to the inner wall of each set of U-shaped frames, a drive structure mounted on the U-shaped frames for driving the flattening rollers to rotate, and an adjustment structure mounted on the uprights for adjusting the spacing between the flattening rollers.

[0008] Preferably, in a set of rollers, the upper roller is used to cover the plastic film and the lower roller is used to cover the woven bag.

[0009] Preferably, the driving structure of the flattening assembly includes a motor installed on one side of each U-shaped frame, a first belt gear installed at the output end of each motor, a toothed belt sleeved on the outside of each first belt gear, a set of second belt gears sleeved inside each toothed belt, and each second belt gear being drivenly connected to one end of the flattening roller.

[0010] Preferably, the adjustment structure of the flattening component includes an L-shaped plate fixedly connected to one of the opposite sides of each group of U-shaped frames, and each group of L-shaped plates is threaded with a common threaded rod.

[0011] Preferably, the bottom end of each of the positive and negative threaded rods is rotatably connected to the outer surface of the positive and negative threaded rods, and one end of each set of connecting frames is connected to the outer side of the upright plate.

[0012] Preferably, each of the U-shaped frames is fixedly connected to a guide block on one side near the upright plate, and a guide frame is slidably connected to the outer surface of each group of guide blocks, with one side of each guide frame connected to the inner side of the upright plate.

[0013] Preferably, the adjustment structure of the flattening assembly further includes a motor fixedly connected to the front of one of the upright plates. The output end of the motor is equipped with a worm gear, and a set of worm wheels meshes with the outside of the worm gear. The bottom surface of each worm wheel is connected to the top end of a positive and negative threaded rod.

[0014] Preferably, the other end of the worm gear is rotatably connected to a frame plate, and the bottom end of the frame plate is connected to the outer side of another vertical plate.

[0015] Preferably, a set of lifting rods is fixedly connected to one side of each L-shaped plate, and the other end of each lifting rod is connected to the outer surface of the U-shaped frame.

[0016] Preferably, a support frame is fixedly connected to the bottom surface of a group of the upright plates.

[0017] Beneficial effects:

[0018] 1. With the flattening component, when the plastic film wrinkles during the conveying process, the flattening roller can pull the two sides of the plastic film outward to fully unfold it, so that the plastic film is in a flat state when passing through the gap between the heating roller and the holding roller. This avoids the plastic film softening and sticking to the woven bag, resulting in air bubbles, voids and other phenomena, and further improves the flatness of the film coating.

[0019] 2. Through the coordination of the motor, worm gear and worm wheel, the positive and negative threaded rods can be driven to rotate synchronously, ensuring that the flattening rollers on the L-shaped plate can simultaneously and equally approach or move away from the plastic film, ensuring that uniform tension is applied to both sides of the plastic film, effectively avoiding secondary deformation of the plastic film due to uneven force, and further ensuring the flattening effect of the plastic film. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0021] Figure 2 This is a three-dimensional structural schematic diagram of the side view of the upright plate of this utility model.

[0022] Figure 3 This is a three-dimensional structural schematic diagram of the guide roller of this utility model from a side view.

[0023] Figure 4 This is a three-dimensional structural diagram of the flattening component of this utility model.

[0024] Figure 5 This is a three-dimensional structural diagram of the flattening roller of this utility model.

[0025] Figure 6 This is a three-dimensional structural diagram of the L-shaped plate of this utility model.

[0026] Figure 1-6 In the diagram, the correspondence between component names and drawing numbers is as follows:

[0027] 1. Vertical plate; 2. Roller sleeve; 3. Heating roller; 4. Supporting roller; 5. Guide roller; 6. Flattening assembly; 601. U-shaped frame; 602. Flattening roller; 603. Motor; 604. First gear belt; 605. Toothed belt; 606. Second gear belt; 607. L-shaped plate; 608. Positive and negative threaded rod; 609. Connecting frame; 610. Guide block; 611. Guide frame; 612. Motor; 613. Worm gear; 614. Worm wheel; 615. Frame plate; 616. Lifting rod; 7. Support frame. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] First Embodiment

[0030] As attached Figure 1 To be continued Figure 3As shown: A woven bag production laminating device includes a set of upright plates 1, a set of sleeve rollers 2 installed on one side of the set of upright plates 1, heating rollers 3 installed between the set of upright plates 1, and supporting rollers 4 installed between the set of upright plates 1 and below the heating rollers 3. The set of sleeve rollers 2 includes an upper sleeve roller 2 for laminating plastic film and a lower sleeve roller 2 for laminating woven bags. A guide roller 5, installed between the set of upright plates 1 and flush with the bottom end of the heating rollers 3, is used to guide the plastic film. The bottom end of the guide roller 5 is flush with the bottom end of the heating rollers 3, ensuring that the plastic film between the guide roller 5 and the heating rollers 3 is in a horizontal state. First, the plastic film is... The rolled plastic film on the upper roller 2 is unrolled and passed horizontally under the guide roller 5, then passed between the flattening rollers 602, and finally passed through the gap between the heating roller 3 and the supporting roller 4. Then, the woven bag to be coated is directly passed through the gap between the heating roller 3 and the supporting roller 4. The plastic film and the woven bag will stick together in the gap between the heating roller 3 and the supporting roller 4. Then, the front ends of the plastic film and the woven bag are wound together on the take-up roller. When the take-up roller is working, it will drive the plastic film and the woven bag to be conveyed forward synchronously. During the conveying process, the heating roller 3 will heat and press the plastic film to stick it to the woven bag.

[0031] Second Embodiment

[0032] As attached Figure 1 Appendix Figure 2 Appendix Figure 4 Appendix Figure 5 With appendix Figure 6As shown: The flattening assembly 6 is mounted on a set of upright plates 1. It includes two sets of U-shaped frames 601 positioned between the upright plates 1, a set of flattening rollers 602 rotatably connected to the inner wall of each U-shaped frame 601, and a drive structure mounted on the U-shaped frames 601 for driving the flattening rollers 602 to rotate. The drive structure of the flattening assembly 6 includes a motor 603 mounted on one side of each U-shaped frame 601. Each motor 603 has a first gear 604 mounted at its output end. Each first gear 604 is fitted with a toothed belt 605, and each toothed belt 605 has a set of second gears 606 mounted inside it. Each second gear 606 is connected to one end of the flattening roller 602 for transmission, controlling the motors 603 on the adjacent U-shaped frames 601 to rotate. The motor 603 drives the first belt gear 604 to rotate, and through the toothed belt 605, it connects with the second belt gear 606 to drive the flattening roller 602 to rotate. Each set of flattening rollers 602 above and below the plastic film rotates in opposite directions. When wrinkles appear in the plastic film during transportation, the flattening roller 602 pulls the two sides of the plastic film outward through the friction between the plastic film and the plastic film to fully unfold it, so that the plastic film always remains flat. After being flattened, the plastic film continues to move forward under the traction of the take-up roller. After being heated and pressed by the high temperature of the heating roller 3, the plastic film quickly softens and adheres to the surface of the woven bag, which can avoid the formation of air bubbles and voids between the plastic film and the woven bag, and further improve the flatness of the film coating.

[0033] An adjustment structure, mounted on the upright plate 1, is used to adjust the spacing of the flattening rollers 602. The adjustment structure of the flattening assembly 6 includes L-shaped plates 607 fixedly connected to the opposite sides of each U-shaped frame 601. Each L-shaped plate 607 is threaded with two opposing threaded rods 608, whose threads are aligned. Rotating the opposing threaded rods 608 moves the L-shaped plates 607, causing them to move closer or further apart, thus enabling the flattening rollers 602 to adhere to the upper and lower surfaces of the plastic film. A connecting frame 609 is rotatably connected to the bottom and outer surface of each opposing threaded rod 608. One end of each connecting frame 609 is connected to the outer side of the upright plate 1, allowing the opposing threaded rods 608 to be connected to the upright plate 1. To further ensure the stability of the positive and negative threaded rods 608, a stable support can be formed for the U-shaped frame 601 and the flattening roller 602. Each U-shaped frame 601 has a guide block 610 fixedly connected to one side near the upright plate 1. Each set of guide blocks 610 has a guide frame 611 slidably connected to the outer surface of the outer surface of the guide block 610. One side of each guide frame 611 is connected to the inner side of the upright plate 1. The cooperation between the guide block 610 and the guide frame 611 can stabilize the U-shaped frame 601, thereby ensuring its smooth lifting and lowering. Each L-shaped plate 607 has a set of lifting rods 616 fixedly connected to one side. The other end of each lifting rod 616 is connected to the outer surface of the U-shaped frame 601. The lifting rods 616 can connect the U-shaped frame 601 and the L-shaped plate 607, forming a support for the U-shaped frame 601 and enhancing the stability of the U-shaped frame 601.

[0034] The adjustment structure of the flattening assembly 6 also includes a motor 612 fixedly connected to the front of one of the upright plates 1. A worm gear 613 is installed at the output end of the motor 612, and a set of worm wheels 614 are meshed on the outside of the worm gear 613. The bottom surface of each worm wheel 614 is connected to the top end of the positive and negative threaded rods 608. When the motor 612 works, the worm gear 613 will rotate at high speed. Driven by the worm gear 613, the worm wheels 614 rotate smoothly, thereby synchronously driving the positive and negative threaded rods 608 to rotate. This ensures that the flattening rollers 602 on the L-shaped plate 607 can simultaneously and equally approach or move away from the plastic film, guaranteeing uniform tension on both sides of the plastic film. This effectively prevents secondary deformation of the plastic film due to uneven force, further ensuring the flattening effect of the plastic film. The other end of the worm gear 613 is rotatably connected to a support plate 615. The bottom end of the support plate 615 is connected to the outer side of another vertical plate 1. The support plate 615 can be used to suspend and reinforce the other end of the worm gear 613, enhancing its stability during rotation.

[0035] Third Embodiment

[0036] As attached Figure 1 With appendix Figure 2As shown: A set of upright plates 1 are fixedly connected to a support frame 7 on their bottom surfaces. The support frame 7 can provide stable support between the upright plates 1, ensuring the stability of processes such as flattening and laminating the plastic film, and avoiding problems such as plastic film deviation and wrinkles caused by shaking of the upright plates 1, thus providing a guarantee for high-quality lamination production of woven bags.

[0037] Working principle: First, the rolled plastic film is unrolled and passed horizontally under the guide roller 5, then passed between the flattening rollers 602, and finally passed through the gap between the heating roller 3 and the supporting roller 4. Next, the woven bag to be coated is passed directly through the gap between the heating roller 3 and the supporting roller 4. The plastic film and the woven bag will adhere to each other in the gap between the heating roller 3 and the supporting roller 4. Then, the front ends of the plastic film and the woven bag are wound together on the take-up roller. When the take-up roller is working, it will drive the plastic film and the woven bag forward synchronously. Then, the motor 612 is controlled to work, and the worm gear 613 will rotate at high speed. Driven by the worm gear 613, the worm wheel 614 rotates smoothly and transmits power to the positive and negative threaded rods 608. The positive and negative threaded rods 608 will rotate on the L-shaped plates 607, and the L-shaped plates 607 will move away or closer synchronously, which can drive the flattening roller 602 to adhere the plastic film. At this time, the motors 603 on the upper and lower adjacent U-shaped frames 601 are controlled to rotate in opposite directions. The motors 603 drive the first belt gear 604 to rotate, and through the toothed belt 605 and the second belt gear 606, they drive the flattening rollers 602 to rotate. Each set of flattening rollers 602 above and below the plastic film rotates in opposite directions. When wrinkles appear in the plastic film during the conveying process, the flattening rollers 602 pull the two sides of the plastic film outward through the friction between them and the plastic film. The tension is used to fully unfold the wrinkles, so that the plastic film always remains flat. After being flattened, the plastic film continues to move forward under the traction of the receiving roller. After being heated and pressed by the high temperature of the heating roller 3, the plastic film quickly softens and adheres to the surface of the woven bag. This can avoid the formation of air bubbles and voids between the plastic film and the woven bag, and further improve the flatness of the film coating.

Claims

1. A woven bag production laminating device, comprising a set of upright plates (1), a set of rollers (2) mounted on one side of the set of upright plates (1), heating rollers (3) mounted between the set of upright plates (1), and a support roller (4) mounted between the set of upright plates (1) and located below the heating rollers (3), characterized in that, Also includes: The guide roller (5) is installed between a set of vertical plates (1) and is flush with the bottom end of the heating roller (3) to guide the plastic film; The flattening assembly (6) is mounted on a set of upright plates (1) and includes two sets of U-shaped frames (601) between the set of upright plates (1), a set of flattening rollers (602) rotatably connected to the inner wall of each set of U-shaped frames (601), a driving structure mounted on the U-shaped frames (601) for driving the flattening rollers (602) to rotate, and an adjustment structure mounted on the upright plates (1) for adjusting the spacing of the flattening rollers (602).

2. The woven bag production laminating device according to claim 1, characterized in that: A set of rollers (2) wherein the upper roller (2) is used to cover the plastic film and the lower roller (2) is used to cover the woven bag.

3. The woven bag production laminating device according to claim 1, characterized in that: The driving structure of the flattening assembly (6) includes a motor (603) installed on one side of each U-shaped frame (601). Each motor (603) has a first belt gear (604) installed at its output end. Each first belt gear (604) is fitted with a toothed belt (605). Each toothed belt (605) has a set of second belt gears (606) fitted inside it. Each second belt gear (606) is connected to one end of the flattening roller (602) for transmission.

4. The woven bag production laminating device according to claim 1, characterized in that: The adjustment structure of the flattening component (6) includes an L-shaped plate (607) fixedly connected to one side of each U-shaped frame (601) that is far apart from each other, and each L-shaped plate (607) is threaded with a common positive and negative thread rod (608).

5. The woven bag production laminating device according to claim 4, characterized in that: Each of the positive and negative threaded rods (608) has a connecting frame (609) rotatably connected to the bottom end of the positive and negative threaded rod (608) and the outer surface of the positive and negative threaded rod (608). One end of each set of connecting frames (609) is connected to the outer side of the upright plate (1).

6. The woven bag production laminating apparatus according to claim 1, characterized in that: Each of the U-shaped frames (601) is fixedly connected to a guide block (610) on one side near the upright plate (1), and a guide frame (611) is slidably connected to the outer surface of each group of guide blocks (610), and one side of each guide frame (611) is connected to the inner side of the upright plate (1).

7. The woven bag production laminating device according to claim 1, characterized in that: The adjustment structure of the flattening assembly (6) also includes a motor (612) fixedly connected to the front of one of the upright plates (1). The output end of the motor (612) is equipped with a worm gear (613). A set of worm wheels (614) are meshed on the outside of the worm gear (613). The bottom surface of each worm wheel (614) is connected to the top end of the positive and negative thread rod (608).

8. The woven bag production laminating apparatus according to claim 7, characterized in that: The other end of the worm (613) is rotatably connected to a frame plate (615), and the bottom end of the frame plate (615) is connected to the outer side of another upright plate (1).

9. The woven bag production laminating device according to claim 4, characterized in that: Each of the L-shaped plates (607) has a set of lifting rods (616) fixedly connected to one side, and the other end of each lifting rod (616) is connected to the outer surface of the U-shaped frame (601).

10. The woven bag production laminating apparatus according to claim 1, characterized in that: A support frame (7) is fixedly connected to the bottom surface of a group of the upright plates (1).

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