A stretching device for a stretching film

Abstract

This utility model discloses a stretching film device with a bottom support. Two brackets are fixedly installed on the top surface of the bottom support, and a bearing seat is fixedly installed on the side of each bracket near the bottom. A main stretching roller is fixedly installed through the middle of the bearing seat. A drive mechanism connected to the main stretching roller is provided on the top surface of the bottom support. A second bearing seat is provided on one side of the bracket above the first bearing seat. The drive mechanism drives the main stretching roller to rotate, and a cylinder adjusts the pressure of the driven stretching roller. The difference in speed between the two rollers is used to achieve uniform stretching of the film, which is suitable for film materials of different thicknesses. When the main stretching roller rotates, the cleaning brush of the cleaning component is synchronously driven to rotate through the connecting mechanism. With the help of the negative pressure system, the cleaned impurities are sucked into the dust collection box to achieve real-time cleaning of the roller surface. This device completes the stretching and cleaning actions synchronously through a single power source, effectively avoiding film surface damage and uneven stretching caused by impurities.

Description

Technical Field

[0001] This utility model relates to the field of stretch film stretching technology, and in particular to a stretch film stretching device. Background Technology

[0002] Stretch film is a self-adhesive plastic film (commonly made of PE). When stretched, it tightly wraps items, utilizing its elastic recoil force to securely package them. It is widely used in logistics, warehousing, and other fields. In practice, stretch film stretching mainly takes the following forms: First, dual-roller stretching, consisting of a drive roller and a driven roller installed parallel to each other. The film is stretched by the speed difference between the two (the drive roller's speed is higher than the driven roller's). In some designs, the driven roller's height is adjustable to accommodate films of different thicknesses. Second, multi-roller progressive stretching devices, using three or more sets of stretching rollers, achieve higher ratios and more uniform stretching by gradually increasing the speed of subsequent roller sets, reducing film necking. Third, clamping roller-rewinding linkage stretching, where the film is fed by a front clamping roller, and the rear winding mechanism rewinds at a speed higher than the feeding speed, utilizing the speed difference between the two to complete the stretching. This method is suitable for low-ratio, continuous packaging scenarios.

[0003] In the stretching process of stretch film production, traditional roller stretching devices are widely used due to their simple structure and low cost. However, in actual operation, the stretching roller, as the core component that directly contacts the stretch film, is prone to the adhesion of various foreign objects during long-term continuous operation. These foreign objects include additive debris (such as slip residue) that falls off the surface of the stretch film, as well as tiny impurities scattered in the production environment, such as packaging material fibers. The attached foreign objects can easily disrupt the uniform contact between the stretch film and the roller surface, causing local deviations in the stress on the film during stretching. Thinner areas of the film are easily overstretched due to the pressure of foreign objects, which can easily produce pinholes or even breakage. Thicker areas are not stretched enough due to the obstruction of foreign objects, resulting in uneven film thickness and affecting the tightness of subsequent winding. If the attached foreign objects are hard particles, they will scratch the roller surface and the film surface when the stretching roller rotates (producing scratches), which not only reduces the transparency and appearance quality of the stretch film, but also weakens the tear resistance of the film.

[0004] Therefore, this application provides a stretching membrane stretching device. Utility Model Content

[0005] This utility model provides a stretch film stretching device that can solve the problem of foreign matter easily adhering to the surface of the stretching roller in traditional roller stretching devices. Specifically, it can promptly clean up additive debris, packaging material fibers scattered in the production environment, and hard particles such as hard plastic residue from the surface of the stretch film, avoiding damage to the film caused by these foreign objects adhering to the surface of the stretching roller for a long time.

[0006] This utility model provides a stretch film stretching device, including: a bottom support, two brackets fixedly installed on the top surface of the bottom support, and a bearing seat one fixedly installed on the side of each of the two brackets near the bottom end, a main stretching roller fixedly installed through the middle of the bearing seat one, a drive mechanism connected to the main stretching roller provided on the top surface of the bottom support, a bearing seat two provided on one side of the bracket above the bearing seat one, a driven stretching roller fixedly installed in the middle of the bearing seat two, and a cleaning component provided on the side of the bracket;

[0007] The cleaning assembly includes a fixed crossbar, an arc-shaped housing, a rotating shaft, cleaning brushes, a negative pressure tube, suction heads, and a connecting pipe. Two fixed crossbars are fixedly installed on the side of the support, and an arc-shaped housing is fixedly installed on the side of each of the two fixed crossbars near the support. The rotating shaft is rotatably connected to the interior of the arc-shaped housing near the center via a bearing. One end of the rotating shaft extends to the outside of the arc-shaped housing. A connecting mechanism connected to the rotating shaft is provided on the outer surface of the main stretching roller. Multiple cleaning brushes are installed in an evenly spaced array on the outer surface of the rotating shaft. A negative pressure tube is fixedly installed on the top and bottom surfaces of the inner sidewall of the arc-shaped housing. Multiple suction heads are installed in an evenly spaced array on the outer surface of the negative pressure tube. A connecting pipe is fixedly installed on one end of the negative pressure tube, and the end of the connecting pipe away from the negative pressure tube is connected to an external air pump.

[0008] According to one embodiment of the present invention, a stretching device for a stretching film includes a connecting mechanism comprising a first pulley, a second pulley, a transmission belt, a synchronous pulley, and a synchronous belt. The first pulley is fixedly mounted on the outer surface of one end of the main stretching roller, and the second pulley is fixedly mounted on the outer end of the rotating shaft extending to the outside of the arc-shaped housing. The outer surfaces of the first pulley and the second pulley are respectively fitted with transmission belts. The outer surface of the outer end of the rotating shaft extending to the outside of the arc-shaped housing is fixedly mounted with a synchronous pulley, and the outer surface of the synchronous pulley is provided with a synchronous belt.

[0009] According to one embodiment of the present invention, a stretching device for a stretching film includes a drive mechanism comprising a general-purpose motor, a first sprocket, and a second sprocket. The general-purpose motor is fixedly mounted on the top surface of the bottom support, the first sprocket is fixedly mounted on the drive end of the general-purpose motor, and the second sprocket, corresponding to the first sprocket, is fixedly mounted on one end of the main stretching roller. The first sprocket and the second sprocket are connected by a chain.

[0010] In one embodiment of the present invention, a stretching device for a stretching film is provided, wherein a cylinder is fixedly installed on the top surface of the support, the telescopic end of the cylinder extends into the interior of the support, and the telescopic end of the cylinder is fixed to the top surface of the bearing seat.

[0011] In one embodiment of the present invention, a stretching device for a stretching film is provided, wherein a connecting bracket is fixedly installed on the rear side of the bottom support, and multiple auxiliary rollers are rotatably connected inside the connecting bracket in a staggered manner.

[0012] In one embodiment of the present invention, a stretching device for a stretching film is provided, wherein a mounting base is fixedly installed on the front side of the support, and a plurality of fixing plates are symmetrically fixedly installed on the front side of the mounting base, and static elimination rods are fixedly installed on the sides of the plurality of fixing plates that are close to each other.

[0013] In a stretching device for a stretching film according to one embodiment of the present invention, the cleaning brush is made of nylon material.

[0014] In a stretching film stretching device according to one embodiment of the present invention.

[0015] The technical solution provided in this application embodiment can include the following beneficial effects: After the stretch film is drawn out from the unwinding mechanism, it first passes through an electrostatic eliminator to remove surface static electricity to reduce dust adsorption, and then enters between the main and driven stretching rollers. The drive mechanism drives the main stretching roller to rotate, while the cylinder adjusts the pressure of the driven stretching roller. The difference in speed between the two rollers is used to achieve uniform stretching of the film, which is suitable for film materials of different thicknesses. When the main stretching roller rotates, the cleaning brush of the cleaning component is driven to rotate synchronously through the connecting mechanism. With the help of the negative pressure system, the cleaned impurities are sucked into the dust collection box to achieve real-time cleaning of the roller surface. This device completes the stretching and cleaning actions synchronously through a single power source, effectively avoiding film surface damage and uneven stretching caused by impurity adhesion, improving the adaptability to different film materials, and ensuring the appearance quality and mechanical properties of the stretch film.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a stretching device for a stretching film provided in one embodiment of this application;

[0019] Figure 2 yes Figure 1 Schematic diagram of the structure of the mid-arc shell;

[0020] Figure 3 yes Figure 2 Enlarged structural diagram at point A;

[0021] Figure 4 yes Figure 2 Schematic diagram of the internal structure of the arc-shaped shell;

[0022] Figure 5 yes Figure 3 A schematic diagram of the structure of the cleaning brush. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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 or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] like Figures 1 to 5 As shown, this application provides a stretching film stretching device, comprising:

[0027] The bottom support 1 has an I-beam base 16 fixedly installed on its bottom surface. Two brackets 2 are fixedly installed on the top surface of the bottom support 1, and a bearing seat 3 is fixedly installed on the side of each bracket 2 near its bottom. A main stretching roller 4 is fixedly installed through the middle of the bearing seat 3. A second bearing seat 5 is set on one side of the bracket 2 above the bearing seat 3. A driven stretching roller 6 is fixedly installed in the middle of the second bearing seat 5. A cylinder 9 is fixedly installed on the top surface of the bracket 2. The telescopic end of the cylinder 9 extends into the interior of the bracket 2 and is fixed to the top surface of the second bearing seat 5. The I-beam base 16 enhances the overall structural rigidity and effectively counteracts vibration and impact during the stretching process, preventing equipment displacement from affecting the stretching accuracy. The main stretching roller 4 and the driven stretching roller 6 are set up vertically and vertically, and with the telescopic adjustment function of the cylinder 9, they can flexibly adapt to stretching films of different thicknesses. For thick films, the spacing can be increased to prevent crushing, and for thin films, the spacing can be decreased to ensure clamping force, ensuring uniform stress on the film.

[0028] A mounting base 13 is fixedly installed on the front side of the support 2. Multiple fixing plates 14 are symmetrically fixedly installed on the front side of the mounting base 13, and static elimination rods 15 are fixedly installed on the side of the multiple fixing plates 14 that are close to each other. A connecting bracket 11 is fixedly installed on the rear side of the bottom support 1. Multiple auxiliary rollers 12 are rotatably connected inside the connecting bracket 11 in a staggered manner. The static elimination rods 15 can reduce the static electricity on the surface of the stretch film, reduce the dust and fiber impurities adsorbed by static electricity, and reduce the risk of subsequent roller surface contamination. The staggered auxiliary rollers 12 can form a stable support and guide for the film, avoid tension fluctuations caused by the film sagging due to its own weight before and after stretching, and ensure continuous and stable stretching process.

[0029] The top surface of the bottom support 1 is provided with a drive mechanism 10 connected to the main stretching roller 4. The drive mechanism 10 includes a general-purpose motor 101, a first sprocket 102, and a second sprocket 103. The general-purpose motor 101 is fixedly installed on the top surface of the bottom support 1. The first sprocket 102 is fixedly installed on the drive end of the general-purpose motor 101. The second sprocket 103, corresponding to the first sprocket 102, is fixedly installed on one end of the main stretching roller 4. The first sprocket 102 and the second sprocket 103 are connected by a chain. Through the set sprocket transmission structure, the transmission efficiency is high and the speed is stable, which can ensure that the speed error of the main stretching roller 4 will not be too large. At the same time, by adjusting the general-purpose motor 101, the linear speed of the main roller and the stable speed difference formed by the driven roller can be flexibly controlled to meet the requirements of different stretching ratios.

[0030] A cleaning component 7 is provided on the side of the bracket 2. The cleaning component 7 includes a fixed crossbar 701, an arc-shaped housing 702, a rotating shaft 703, a cleaning brush 704, a negative pressure tube 705, a suction head 706, and a connecting pipe 707. Two fixed crossbars 701 are fixedly installed on the side of the bracket 2, and an arc-shaped housing 702 is fixedly installed on the side of each of the two fixed crossbars 701 near the bracket 2. The rotating shaft 703 is rotatably connected to the inside of the arc-shaped housing 702 near the center through a bearing. One end of the rotating shaft 703 extends to the outside of the arc-shaped housing 702. A connecting mechanism 8 connected to the rotating shaft 703 is provided on the outer surface of the main stretching roller 4. The arc-shaped housing 702 and the main stretching roller 4 can form a semi-enclosed structure, which can focus the cleaning area and prevent the cleaning debris from splashing and polluting the environment. The fixed crossbars 701 can ensure the relative position of the cleaning component 7 and the main roller is stable, so that the cleaning brush and the roller surface maintain good contact pressure and avoid fluctuations in cleaning effect due to vibration.

[0031] The connecting mechanism 8 includes a first pulley 801, a second pulley 802, a drive belt 803, a synchronous pulley 804, and a synchronous belt 805. The first pulley 801 is fixedly mounted on the outer surface of one end of the main tension roller 4. The second pulley 802 is fixedly mounted on the end of the rotating shaft 703 extending to the outside of the arc-shaped housing 702. Drive belts 803 are respectively fitted onto the outer surfaces of the first pulley 801 and the second pulley 802. The synchronous pulley 804 is fixedly mounted on the outer surface of the end of the rotating shaft 703 extending to the outside of the arc-shaped housing 702. The outer surface of the synchronous pulley 804 is provided with a synchronous belt 805; one end of one of the two rotating shafts 703 is equipped with a pulley 802. Through the transmission of the pulley, the main stretching roller 4 and the cleaning brush 704 can rotate in opposite directions (the main roller rotates clockwise and the brush rotates counterclockwise), forming relative friction and improving the cleaning effect of additive debris. At the same time, the synchronous pulley 804 and the synchronous belt 805 can ensure that the negative pressure system and the cleaning brush are linked to achieve a seamless connection between "sweeping and adsorption" and avoid impurities from being re-attached on the roller surface.

[0032] Multiple cleaning brushes 704, made of nylon, are evenly spaced arrayed on the outer surface of the rotating shaft 703. Negative pressure tubes 705 are fixedly installed on the top and bottom surfaces of the inner wall of the arc-shaped housing 702. Multiple suction heads 706 are evenly spaced arrayed on the outer surface of the negative pressure tubes 705. A connecting pipe 707 is fixedly installed at one end of the negative pressure tube 705, and the end of the connecting pipe 707 away from the negative pressure tube 705 is connected to an external air pump. The nylon cleaning brushes 704, with their combination of softness and wear resistance, effectively remove fibrous impurities and additive debris without scratching the chrome-plated surface of the main stretching roller. The negative pressure tubes 705 and suction heads 706 can suck up cleaning impurities in real time, which are then collected centrally through the connecting pipe, completely solving the problems of membrane scratches and uneven stretching caused by untimely manual cleaning in traditional devices.

[0033] The working process of the stretch film stretching device is as follows: The stretch film is first drawn out from the unwinding mechanism and passes through the static elimination bar 15 at the mounting base 13 to eliminate static electricity on the film surface to reduce dust adsorption. Then, the film body after eliminating static electricity enters between the main stretching roller 4 and the driven stretching roller 6. At this time, the general motor 101 in the drive mechanism 10 starts and drives the sprocket 102 to rotate. The power is transmitted to the main stretching roller 4 through the sprocket 102, the chain and the second sprocket 103, driving the main stretching roller 4 to rotate. At the same time, the cylinder 9 adjusts the pressure of the driven stretching roller 6. The film body is stretched evenly by using the speed difference between the two rollers, so as to adapt to the stretching requirements of film materials of different thicknesses.

[0034] When the main stretching roller 4 rotates, the synchronous pulley 804 and synchronous belt 805 are driven to rotate through the pulley 801, pulley 802 and transmission belt 803 in the connecting mechanism 8. This drives the rotating shaft 703 in the cleaning component 7 to rotate, so that the nylon cleaning brush 704 can clean the foreign matter attached to the surface of the main stretching roller 4. At the same time, the external air pump is started, so that the suction head 706 generates negative pressure, and the cleaned impurities are sucked into the dust collection box through the negative pressure pipe 705 and the connecting pipe 707 in sequence, realizing real-time cleaning of the roller surface. This device can drive the main stretching roller 4 to complete the stretching action through the universal motor 101 in the drive mechanism 10, and can also drive the cleaning brush 704 in the cleaning component 7 to rotate synchronously through the connecting mechanism 8, thereby effectively cleaning the impurities on the surface of the main stretching roller 4 and avoiding the long-term adhesion of impurities from affecting the stretching effect of the stretching film. It can effectively solve the problems of film surface damage and uneven stretching caused by foreign matter adhesion in traditional roller stretching, while improving the adaptability of the equipment to different film materials and ensuring the appearance quality and mechanical properties of the stretching film.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A stretching device for a stretching film, characterized in that, include: The bottom support has two brackets fixedly installed on its top surface, and a bearing seat one is fixedly installed on the side of each bracket near the bottom end. A main stretching roller is fixedly installed through the middle of the bearing seat one. A drive mechanism connected to the main stretching roller is provided on the top surface of the bottom support. A bearing seat two is provided on one side of the bracket above the bearing seat one. A driven stretching roller is fixedly installed in the middle of the bearing seat two. A cleaning component is provided on the side of the bracket. The cleaning assembly includes a fixed crossbar, an arc-shaped housing, a rotating shaft, cleaning brushes, a negative pressure tube, suction heads, and a connecting pipe. Two fixed crossbars are fixedly installed on the side of the support, and an arc-shaped housing is fixedly installed on the side of each of the two fixed crossbars near the support. The rotating shaft is rotatably connected to the interior of the arc-shaped housing near the center via a bearing. One end of the rotating shaft extends to the outside of the arc-shaped housing. A connecting mechanism connected to the rotating shaft is provided on the outer surface of the main stretching roller. Multiple cleaning brushes are installed in an evenly spaced array on the outer surface of the rotating shaft. A negative pressure tube is fixedly installed on the top and bottom surfaces of the inner sidewall of the arc-shaped housing. Multiple suction heads are installed in an evenly spaced array on the outer surface of the negative pressure tube. A connecting pipe is fixedly installed on one end of the negative pressure tube, and the end of the connecting pipe away from the negative pressure tube is connected to an external air pump.

2. The stretching device for a stretching film according to claim 1, characterized in that: The connecting mechanism includes a first pulley, a second pulley, a transmission belt, a synchronous pulley, and a synchronous belt. The first pulley is fixedly installed on the outer surface of one end of the main stretching roller. The second pulley is fixedly installed on the end of the rotating shaft that extends to the outside of the arc-shaped housing. The outer surfaces of the first pulley and the second pulley are respectively fitted with transmission belts. The outer surface of the end of the rotating shaft that extends to the outside of the arc-shaped housing is fixedly installed with a synchronous pulley. The outer surface of the synchronous pulley is provided with a synchronous belt.

3. The stretching device for a stretching film according to claim 1, characterized in that: The drive mechanism includes a general-purpose motor, a first sprocket, and a second sprocket. The general-purpose motor is fixedly installed on the top surface of the bottom support. The first sprocket is fixedly installed on the drive end of the general-purpose motor. The second sprocket, corresponding to the first sprocket, is fixedly installed on one end of the main stretching roller. The first sprocket and the second sprocket are connected by a chain.

4. The stretching device for a stretching film according to claim 1, characterized in that: A cylinder is fixedly installed on the top surface of the bracket, and the telescopic end of the cylinder extends into the interior of the bracket. The telescopic end of the cylinder is fixed to the top surface of the bearing seat.

5. The stretching device for a stretching film according to claim 1, characterized in that: A connecting bracket is fixedly installed on the rear side of the bottom support, and multiple auxiliary rollers are rotatably connected inside the connecting bracket in a staggered manner.

6. The stretching device for a stretching film according to claim 1, characterized in that: A mounting base is fixedly installed on the front side of the bracket, and multiple fixing plates are symmetrically fixedly installed on the front side of the mounting base. Static eliminator rods are fixedly installed on the sides of the multiple fixing plates that are close to each other.

7. The stretching device for a stretching film according to claim 1, characterized in that: The cleaning brush is made of nylon material.

8. The stretching device for a stretching film according to claim 1, characterized in that: An I-beam base is fixedly installed on the bottom surface of the bottom support.

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