Paper stretching device

Abstract

The utility model belongs to the technical field of packaging processing, and discloses a paper stretching device which comprises a rack, feeding rollers, a stretching unit and a driving unit, the rack comprises a base, supports are fixedly connected to the tops of the two sides of the base, the feeding rollers comprise a die cutting paper roller and a lining paper roller, and the die cutting paper roller and the lining paper roller are movably connected to the tops of the supports; the die cutting paper roller is located on the rear side of the lining paper roller, the driving unit is in transmission connection with the stretching unit, the stretching unit comprises a first roller set and a second roller set which are movably connected into the base, the first roller set is located on the rear side, the second roller set is located on the front side, and the rotating speed of the second roller set is larger than that of the first roller set. Through the arrangement of the first roller set and the second roller set, die cutting paper is stretched and unfolded through the rotating speed difference between the two roller sets, honeycomb-shaped broaching holes are formed, an operator does not need to manually adjust damping and stretching strength of the material rollers, then the binding task can be rapidly completed, the labor intensity is reduced, and the production quality and efficiency are also greatly improved.

Description

Technical Field

[0001] This application relates to the field of packaging processing technology, and more specifically, to a paper stretching device. Background Technology

[0002] Many items are fragile, such as glassware, which can shatter with the slightest bump. Some items, like fruit, can be damaged by being squeezed together, causing them to deform and rot. Protecting the surface of these items is especially important during storage and transportation. Foamed plastics are commonly used to separate items; fruit netting is particularly widespread. Currently, fruit netting on the market is generally made of PE foam, a type of plastic product made from high-foam polyethylene extruded from low-density polyethylene. Its independent and dense bubble structure gives it high elasticity, toughness without brittleness, and a soft surface, effectively preventing damage caused by friction during packaging. It also has excellent shock absorption and impact resistance. It is mainly used for packaging fruits, vegetables, ceramics, and glass crafts. However, this type of netting is difficult to degrade and can cause significant environmental pollution.

[0003] Die-cut kraft paper is a cost-effective and environmentally friendly cushioning packaging material made from recyclable paper. By die-cutting rows of staggered, patterned slits on the surface of the kraft paper, it stretches to form a honeycomb mesh structure. It can not only be used to wrap items for cushioning and protection, but also as a filler to fill gaps in items, achieving a shock-absorbing effect and preventing damage caused by shaking during transportation. Furthermore, it is 100% recyclable after use and can replace bubble wrap, blister packs, polystyrene foam, and other foamed plastic cushioning packaging.

[0004] Die-cut packaging kraft paper is typically stretched using a stretching device to ensure that the decorative cuts on the honeycomb packaging paper remain open during use. However, existing paper stretching devices use rolls of die-cutting paper consumables, which are fixed by support rollers. The opening of the decorative cuts is achieved by adjusting the resistance between the support rollers and the core of the die-cutting paper consumable roll. Existing paper stretching devices require constant adjustment of the damping components on the support rollers to maintain a constant damping output due to the varying diameter of the paper roll. Furthermore, high resistance between the support rollers and the core of the die-cutting paper consumable roll can cause the stretching module to slip, preventing the paper roll from forming a honeycomb shape, making them inconvenient to use. Summary of the Invention

[0005] To address the aforementioned problems, this application provides a paper stretching device.

[0006] The paper stretching device provided in this application adopts the following technical solution:

[0007] A paper stretching device includes a frame, a feeding roller, a stretching unit, and a drive unit. The frame includes a base, with supports fixedly connected to the top of both sides of the base. The feeding roller includes a die-cutting roller and a liner roller, which are movably connected to the top of the supports. The die-cutting roller is located behind the liner roller. The drive unit is drivenly connected to the stretching unit. The stretching unit includes a first roller group and a second roller group, which are movably connected inside the base. The first roller group is located at the rear, and the second roller group is located at the front. The rotational speed of the second roller group is greater than that of the first roller group. Both the first roller group and the second roller group consist of two sets of identical cylindrical rollers distributed vertically. The surfaces of the rollers of the first roller group and the second roller group are evenly spaced with annular protrusions.

[0008] Furthermore, both the first and second roller groups are covered with baffle plates on their outer surfaces. Each baffle plate has a through groove corresponding to annular protrusions, so that the baffle plate is embedded in the gap between the annular protrusions.

[0009] Furthermore, the baffle plate located outside the roller body below the first roller group is also provided with a guide plate, which extends from the gap between the two roller bodies of the first roller group to the gap between the two roller bodies of the second roller group.

[0010] Furthermore, the two ends of the two roller shafts of the first roller group are movably connected to adjusting and fixing plates. The adjusting and fixing plates are movably connected to both sides of the base by bolts. The adjusting and fixing plates include two independent adjusting shaft plates, and a tension spring is provided between the two adjusting shaft plates.

[0011] Furthermore, the drive unit includes a drive motor, which is fixedly connected to the inside of the base. The output end of the drive motor is connected to one end of one of the roller shafts in the first roller group via a pulley. The other end of the roller shaft is connected to one of the roller shafts in the second roller group via a synchronous pulley. The diameter of the synchronous pulley on the first roller group is larger than that of the synchronous pulley on the second roller group. The two roller shafts of the second roller group are connected by two gears of the same size.

[0012] Furthermore, a cutting unit is horizontally arranged on the front of the base. The cutting unit includes a slide rail and a slider. The slide rail is fixedly connected to the base, and the slider is slidably connected to the slide rail. A cutting blade is detachably and fixedly connected to the bottom of the slider. The bottom surface of the slider and the gap between the two rollers of the second roller group are located on the same horizontal plane.

[0013] In summary, this application includes at least one of the following beneficial technical effects:

[0014] This application utilizes a first roller group and a second roller group. The two roller groups press the die-cut paper separately. Driven by the drive unit, due to the speed difference between the two roller groups (the second roller group rotates faster than the first roller group), a tensile force is generated, stretching the die-cut paper and forming honeycomb-shaped perforations. Simultaneously, the second roller group also pulls the liner paper roll, allowing the stretched die-cut paper to be fed out synchronously with the liner paper. This stretching device can automatically stretch the die-cut paper, eliminating the need for the operator to manually adjust the damping and stretching force of the rollers. This allows for rapid completion of the wrapping task, reducing labor intensity and significantly improving production quality and efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the appearance of this application;

[0016] Figure 2 This is a schematic diagram showing the structural breakdown of this application;

[0017] Figure 3 This is a side perspective view of this application.

[0018] Explanation of the labels in the diagram:

[0019] 1. Frame; 11. Base; 12. Support; 2. Feeding roller; 21. Die-cutting roller; 22. Liner roller; 3. Stretching unit; 31. First roller group; 32. Second roller group; 33. Annular protrusion; 34. Baffle plate; 35. Guide plate; 36. Adjusting and fixing plate; 37. Tension spring; 4. Drive unit; 41. Drive motor; 42. Pulley; 43. Synchronous pulley; 44. Gear; 5. Cutting unit; 51. Slide rail; 52. Slider; 53. Cutting blade. Detailed Implementation

[0020] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Example

[0023] The present application will be further described in detail below with reference to the accompanying drawings.

[0024] This application discloses a paper stretching device, including a frame 1, a feeding roller 2, a stretching unit 3, and a drive unit 4. The frame 1 includes a base 11, and supports 12 are fixedly connected to the top of both sides of the base 11. The feeding roller 2 includes a die-cutting roller 21 and a liner roller 22, which are movably connected to the top of the support 12. The die-cutting roller 21 is located behind the liner roller 22. The drive unit 4 is connected to the stretching unit 3. The stretching unit 3 includes a first roller group 31 and a second roller group 32, which are movably connected inside the base 11. The first roller group 31 is located at the rear, and the second roller group 32 is located at the front. The rotational speed of the second roller group 32 is greater than that of the first roller group 31. Both the first roller group 31 and the second roller group 32 are composed of two sets of identical cylindrical rollers distributed vertically. Annular protrusions 33 are evenly spaced on the surface of the rollers of the first roller group 31 and the second roller group 32.

[0025] Please see Figure 2 and Figure 3 Both the first roller group 31 and the second roller group 32 are covered with baffle plates 34. Each baffle plate 34 has a through groove corresponding to annular protrusions 33, so that the baffle plate 34 is embedded in the gap between the annular protrusions 33. The baffle plate 34 located on the outside of the roller body below the first roller group 31 is also provided with a guide plate 35, which extends from the gap between the two roller bodies of the first roller group 31 to the gap between the two roller bodies of the second roller group 32.

[0026] Please see Figure 2 and Figure 3 The two ends of the two roller shafts of the first roller group 31 are movably connected to the adjustment fixing plate 36. The adjustment fixing plate 36 is movably connected to both sides of the base 11 by bolts. The adjustment fixing plate 36 includes two independent adjustment shaft plates, and a tension spring 37 is provided between the two adjustment shaft plates.

[0027] Please see Figure 2 and Figure 3The drive unit 4 includes a drive motor 41, which is fixedly connected to the inside of the base 11. The output end of the drive motor 41 is connected to one end of one of the roller shafts of the first roller group 31 via a pulley 42. The other end of the roller shaft is connected to one of the roller shafts of the second roller group 32 via a synchronous pulley 43. The diameter of the synchronous pulley 43 on the first roller group 31 is larger than that of the synchronous pulley 43 on the second roller group 32. The two roller shafts of the second roller group 32 are connected by two gears 44 of the same size.

[0028] As a further preferred embodiment, a cutting unit 5 is horizontally arranged on the front side of the base 11. The cutting unit 5 includes a slide rail 51 and a slider 52. The slide rail 51 is fixedly connected to the base 11, and the slider 52 is slidably connected to the slide rail 51. A cutting blade 53 is detachably and fixedly connected to the bottom of the slider 52. The bottom surface of the slider 52 and the gap between the two rollers of the second roller group 32 are located on the same horizontal plane.

[0029] The implementation principle of the paper stretching device in this application embodiment is as follows: Through the arrangement of a first roller group 31 and a second roller group 32, the two roller groups respectively press the die-cut paper. Driven by the drive unit 4, due to the speed difference between the two roller groups (the second roller group 32 rotates faster than the first roller group 31), a stretching force is generated, stretching the die-cut paper and forming honeycomb-shaped holes. Simultaneously, the second roller group 32 also pulls the liner paper roll, allowing the stretched die-cut paper to be fed out synchronously with the liner paper. Furthermore, the annular protrusions 33 on the first roller group 31 and the second roller group 32 effectively prevent excessive compression damage to the die-cut paper during the stretching process. The baffle plate 34 prevents material jamming on the rollers. The guide plate 35 makes feeding the die-cut paper roll more convenient.

[0030] In use, the die-cut paper roll and the liner paper roll are first placed on the die-cutting paper roller 21 and the liner paper roller 22 respectively. The die-cutting paper head is inserted into the central slot of the first roller group 31 from the rear end, and the liner paper head is inserted into the central slot of the second roller group 32 from the rear end. The device is started, and the first roller group 31 drives the die-cutting paper roll forward. Then, the front end of the die-cutting paper moves from the rear end of the second roller group 32 into the central slot. At this time, the die-cutting paper and the liner paper extend together from the front end of the second roller group 32. After stretching to the required length, the liner paper of the die-cutting paper box can be cut by manually sliding the slider 52 of the cutting unit 5. Through this stretching device, the die-cutting paper can be automatically stretched by about 1.68 times. The operator does not need to manually adjust the damping and stretching force of the roller, thus quickly completing the wrapping task, which not only reduces labor intensity but also greatly improves production quality and efficiency.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A paper stretching device, characterized in that, The machine includes a frame (1), a feeding roller (2), a stretching unit (3), and a drive unit (4). The frame (1) includes a base (11), and brackets (12) are fixedly connected to the top of both sides of the base (11). The feeding roller (2) includes a die-cutting roller (21) and a liner roller (22). The die-cutting roller (21) and the liner roller (22) are movably connected to the top of the bracket (12). The die-cutting roller (21) is located behind the liner roller (22). The drive unit (4) is connected to the stretching unit (3). The stretching unit (3) is driven by the feed roller (21). The first roller group (31) and the second roller group (32) are movably connected inside the base (11). The first roller group (31) is located on the rear side and the second roller group (32) is located on the front side. The rotational speed of the second roller group (32) is greater than that of the first roller group (31). The first roller group (31) and the second roller group (32) are both composed of two sets of identical cylindrical rollers distributed vertically. The roller surfaces of the first roller group (31) and the second roller group (32) are provided with annular protrusions (33) at equal intervals.

2. The paper stretching device according to claim 1, characterized in that: The first roller group (31) and the second roller group (32) are both covered with baffle plates (34). Each baffle plate (34) has a through groove corresponding to the annular protrusion (33), so that the baffle plate (34) is embedded in the gap between each annular protrusion (33).

3. The paper stretching device according to claim 2, characterized in that: The baffle plate (34) located outside the roller body below the first roller group (31) is also provided with a guide plate (35), which extends from the gap between the two roller bodies of the first roller group (31) to the gap between the two roller bodies of the second roller group (32).

4. The paper stretching device according to claim 1, characterized in that: The two ends of the two roller shafts of the first roller group (31) are movably connected to the adjustment fixing plate (36). The adjustment fixing plate (36) is movably connected to both sides of the base (11) by bolts. The adjustment fixing plate (36) includes two independent adjustment shaft plates, and a tension spring (37) is provided between the two adjustment shaft plates.

5. A paper stretching device according to claim 1, characterized in that: The drive unit (4) includes a drive motor (41), which is fixedly connected to the inside of the base (11). The output end of the drive motor (41) is connected to one end of one of the roller shafts of the first roller group (31) via a pulley (42). The other end of the roller shaft is connected to one of the roller shafts of the second roller group (32) via a synchronous pulley (43). The diameter of the synchronous pulley (43) on the first roller group (31) is larger than the diameter of the synchronous pulley on the second roller group (32). The two roller shafts of the second roller group (32) are connected by two gears (44) of the same size.

6. The paper stretching apparatus according to any one of claims 1-5, characterized in that: A cutting unit (5) is horizontally arranged on the front of the base (11). The cutting unit (5) includes a slide rail (51) and a slider (52). The slide rail (51) is fixedly connected to the base (11). The slider (52) is slidably connected to the slide rail (51). A cutting blade (53) is detachably fixedly connected to the bottom of the slider (52). The bottom surface of the slider (52) and the gap between the two rollers of the second roller group (32) are located on the same horizontal plane.

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