Leveling device for plastic bag processing

Abstract

The utility model relates to the field of fabricated buildings, and particularly provides a flattening device for plastic bag processing. The air cooling device comprises a main support, an auxiliary support and a plastic film, a first conveying roller, a second conveying roller and a third conveying roller are rotationally arranged at the top of the main support through bearing seats, and an air cooling mechanism is arranged on the inner side of the main support. According to the plastic film cooling device, cold air can be directly and evenly blown to the surface of a plastic film through the arrangement of the air guide barrel, air blowing refrigeration on the plastic film is achieved, the efficient and even cooling effect is ensured, the plastic film is supported through the supporting rollers, the two refrigeration modes of air cooling and water cooling are combined, efficient and even cooling on the plastic film is achieved, and the service life of the plastic film is prolonged. The cooling effect is improved, and the flatness and quality of the film are ensured, so that the requirements of the plastic bag production industry on high-quality products are met.

Description

Technical Field

[0001] The utility model relates to the field of plastic bag processing, in particular to a flattening device for plastic bag processing. Background Art

[0002] The production process of plastic bags is a multi-step process that integrates raw material preparation, processing and molding, subsequent treatment and quality control. First, plastic resins such as polyethylene are selected and mixed with additives, and then processed into films by melt extrusion or film blowing. Subsequently, subsequent treatments such as cooling and hardening, printing, compounding and bag making are carried out to meet the needs of different customers. During the entire production process, the quality of raw materials is strictly controlled, production standards are implemented, equipment is regularly maintained, and technology is continuously innovated to improve product quality.

[0003] The inventor of this application found that there are the following problems in the practical use process:

[0004] At present, in the production process of plastic bags, plastic film is usually first extruded by a hot extruder, and then the plastic film is rolled up by a cooling device and a flattening device for subsequent use and placement. However, in actual use, the cooling device on the flattening device is mostly a cold water roller, etc., to avoid the situation in which the air flow of the air cooling device blows to the surface of the film and causes wrinkles on the surface of the film during the use of the air cooling device. Therefore, the air cooling device is avoided as much as possible in the cooling device. However, relying solely on water cooling mechanisms such as cold water rollers, the cooling efficiency of the film is difficult to cope with the current faster production efficiency of plastic bags, which is a major pain point in the industry. It is urgently necessary to design a flattening device that can use air cooling to improve the cooling effect on the film.

[0005] Therefore, it is necessary to provide a plastic bag processing flattening device to solve the above technical problems. Utility Model Content

[0006] The technical problem to be solved by the utility model is that it is difficult to use an air cooling mechanism for a film in the prior art, which reduces the cooling effect on the plastic film. In view of the above-mentioned defects of the prior art, a flattening device for plastic bag processing is provided.

[0007] To achieve the above-mentioned purpose, the technical solution of the utility model is: a flattening device for plastic bag processing, comprising a main bracket, a sub-bracket, and a plastic film, the top of the main bracket is rotatably provided with a first transport roller, a second transport roller, and a third transport roller through a bearing seat, the inner side of the main bracket is provided with an air cooling mechanism, the air cooling mechanism comprises a support roller, an air guide tube is provided on one side below the support roller, overflow ports are provided on both sides of the air guide tube, and an air inlet is provided on one side below the air guide tube.

[0008] By adopting the above technical solution, during the transportation of the plastic film, when it is wound around the surface of the support roller, the air-cooling machine starts. The external air-cooling machine blows the cooled air into the inside of the air guide cylinder through the air inlet. Subsequently, this cold air is evenly blown from the air guide cylinder to the surface of the plastic film, effectively reducing its temperature and achieving the effect of blowing and refrigerating.

[0009] Further set, the air guide cylinder is connected to the external air-cooling machine through the air inlet, and the air outlet of the air guide cylinder is opposite to the position of the support roller.

[0010] By adopting the above technical solution, it is ensured that the cold air can be continuously and stably supplied into the air guide cylinder. The cold air generated by the air-cooling machine enters the air guide cylinder through the air inlet, providing sufficient cold source for the subsequent blowing and refrigerating, not only improving the cooling efficiency, but also ensuring the continuity of the cooling process, thus ensuring the continuous cooling of the plastic film on the production line.

[0011] Further set, the opening directions of the overflow air outlets on both sides of the air guide cylinder are parallel to the axial direction of the support roller, which is used to avoid the influence of the discharged air flow on the plastic film.

[0012] By adopting the above technical solution, it is ensured that the air flow discharged from the overflow air outlet can be blown out from both sides of the plastic film, thus avoiding the air flow directly impacting the unsupported film surface. This not only reduces the shaking or offset of the film caused by the air flow impact, but also maintains the stability of the film during the cooling process, which helps to improve the overall quality of the product.

[0013] Further set, the support roller has two but not limited to two diameter size structural forms.

[0014] By adopting the above technical solution, support rollers with different diameters can be selected according to specific requirements, increasing the flexibility and applicability of the equipment, enabling the production line to easily adapt to the production requirements of plastic films with different specifications and thicknesses. For thinner films, support rollers with smaller diameters can be selected to reduce the oppression and damage to the film; while for thicker films, support rollers with larger diameters can be selected to ensure sufficient supporting force and stability.

[0015] Further set, a flattening roller and a limiting roller are rotatably arranged on one side of the main bracket through a bearing seat.

[0016] By adopting the above technical solution, the flattening roller can rotate and adjust flexibly according to production requirements. During the production process of the plastic film, the flattening roller plays a key role. It helps to flatten the film and remove wrinkles, ensuring the flatness and smoothness of the film. Through the rotational setting of the bearing seat, the flattening roller can easily adapt to films with different specifications and thicknesses, improving the versatility and flexibility of the equipment.

[0017] Further setting: Three groups of cold water rollers are arranged on the top of the auxiliary bracket, and the cold water rollers are connected to an external coolant storage device through a liquid pump.

[0018] By adopting the above technical solution, it is ensured that the plastic film can be fully cooled when passing through the cold water rollers. As the cooling element in direct contact with the film, the setting of the number and position of the cold water rollers is crucial for the cooling effect. The configuration of three groups of cold water rollers not only increases the contact area between the film and the cold water rollers but also prolongs the residence time of the film on the cold water rollers, thereby improving the cooling efficiency and uniformity.

[0019] Further setting: The three groups of cold water rollers are arranged in a staggered structure.

[0020] By adopting the above technical solution, each group of cold water rollers can independently cool the plastic film, and at the same time, the occurrence of cooling blind spots is avoided. The staggered arrangement means that the positions of each group of cold water rollers are not completely overlapped but have a certain offset. In this way, when the film passes through, each group of cold water rollers can contact the upper and lower surfaces of the film, thus realizing the comprehensive cooling of the film.

[0021] Compared with the related technology, a flattening device for plastic bag processing provided by the present utility model has the following beneficial effects:

[0022] The present utility model provides a flattening device for plastic bag processing. Through the air-cooling mechanism, as the plastic film is transported on the production line, it will be wound around the support rollers. During this process, the external air-cooling machine starts to work, and cold air is introduced into the inside of the air guide cylinder through the air inlet. The setting of the air guide cylinder enables the cold air to directly and evenly blow on the surface of the plastic film, thereby realizing blowing and refrigerating it, ensuring the high efficiency and uniformity of the cooling effect. At the same time, in order to avoid the adverse impact of the air flow on the film, overflow air outlets are arranged on both sides of the air guide cylinder. These overflow air outlets allow the air flow for heat replacement to be discharged smoothly without blowing to the unsupported plastic film area, thus effectively preventing the film from wrinkling. In addition, the existence of the support rollers provides stable support for the plastic film, ensuring that the film does not shake or wrinkle during the air-cooling process. This application supports the plastic film through the support rollers and combines two refrigeration methods of air-cooling and water-cooling to realize the efficient and uniform cooling of the plastic film, not only improving the cooling effect but also ensuring the flatness and quality of the film, thereby meeting the requirements of the plastic bag production industry for high-quality products. Description of the Drawings

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;

[0024] Figure 2 It is a front view structural schematic diagram of the present utility model;

[0025] Figure 3 is a schematic cross-sectional structure diagram of the present utility model;

[0026] Figure 4 for the present utility model Figure 1 is an enlarged structure diagram of part A in the present utility model.

[0027] Reference numerals in the figure: 1, main support; 2, auxiliary support; 3, cold water roller; 4, plastic film; 501, first transport roller; 502, second transport roller; 503, third transport roller; 504, flattening roller; 505, limiting roller; 6, air cooling mechanism; 601, support roller; 602, air guide cylinder; 603, overflow air outlet; 604, air inlet. Specific embodiments

[0028] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Typical embodiments of the present utility model are shown in the drawings.

[0029] Embodiment 1:

[0030] As Figures 1 - 4 shown, a flattening device for plastic bag processing of the present utility model includes a main support 1, an auxiliary support 2, and a plastic film 4. The top of the main support 1 is rotatably provided with a first transport roller 501, a second transport roller 502, and a third transport roller 503 through a bearing seat. An air cooling mechanism 6 is arranged inside the main support 1. The air cooling mechanism 6 includes a support roller 601. A side below the support roller 601 is provided with an air guide cylinder 602. Both sides of the air guide cylinder 602 are provided with overflow air outlets 603. A side below the air guide cylinder 602 is provided with an air inlet 604. During the transportation of the plastic film 4, when it is wound around the surface of the support roller 601, the air cooling machine starts. The external air cooling machine blows the cooled air into the inside of the air guide cylinder 602 through the air inlet 604. Subsequently, this cold air is evenly blown onto the surface of the plastic film 4 by the air guide cylinder 602, effectively reducing its temperature and achieving the effect of blowing and cooling. At the same time, in order to ensure that the air flow during the cooling process will not have a negative impact on the plastic film 4, especially to avoid generating wrinkles in the unsupported area, the air guide cylinder 602 is specially designed with overflow air outlets 603. These overflow air outlets 603 allow the air flow that has exchanged heat with the film to be discharged smoothly, preventing this air flow from continuing to blow on the unsupported film part. In addition, the stable support of the support roller 601 also plays a key role. It ensures that the plastic film 4 can remain stable during air cooling without shaking or wrinkling.

[0031] As Figure 4As shown, the air guide tube 602 is connected to an external air cooler through the air inlet 604. The air outlet of the air guide tube 602 is opposite to the position of the support roller 601, ensuring that cold air can be continuously and stably supplied into the air guide tube 602. The cold air generated by the air cooler enters the air guide tube 602 through the air inlet, providing sufficient cold source for subsequent blowing and cooling. This not only improves the cooling efficiency but also ensures the continuity of the cooling process, thereby ensuring the continuous cooling of the plastic film 4 on the production line. At the same time, the air outlet of the air guide tube 602 is opposite to the position of the support roller 601. This layout enables the cold air to directly and evenly blow onto the plastic film 4 on the surface of the support roller 601. Since the support roller 601 provides stable support for the plastic film 4, the cold air will not cause the film to shake or wrinkle during the blowing process, ensuring the uniformity of the cooling effect and improving the flatness and quality of the plastic film 4.

[0032] As Figure 4 shown, the opening directions of the overflow air outlets 603 on both sides of the air guide tube 602 are parallel to the axial direction of the support roller 601, which is used to avoid the influence of the discharged air flow on the plastic film 4, ensuring that the air flow discharged from the overflow air outlets 603 can blow out from both sides of the plastic film 4, thus avoiding the air flow directly impacting the unsupported film surface. This not only reduces the shaking or offset of the film caused by the air flow impact but also maintains the stability of the film during the cooling process, contributing to the improvement of the overall quality of the product. At the same time, the parallel opening of the overflow air outlets 603 also plays a role in diverting the air flow, enabling some excess air flow to be discharged orderly through these air outlets instead of forming eddy currents or turbulent flows inside the air guide tube. This orderly air flow discharge method not only reduces the air flow pressure inside the air guide tube 602 but also reduces the disorderly disturbance of the air flow on the film surface.

[0033] Embodiment 2:

[0034] As Figure 1 、 Figure 4 shown, the support roller 601 has two but not limited to two forms of diameter size structures, and the support roller 601 with different diameters can be selected according to specific requirements, increasing the flexibility and applicability of the equipment, enabling the production line to easily adapt to the production requirements of plastic films 4 with different specifications and thicknesses. For thinner films, a support roller with a smaller diameter can be selected to reduce the pressure and damage to the film; while for thicker films, a support roller with a larger diameter can be selected to ensure sufficient supporting force and stability. At the same time, the support rollers 601 with multiple diameter sizes also help to optimize the cooling effect during the production process. The relative positions of the support rollers with different diameters and the air outlet of the air guide tube 602 will be different, thus affecting the blowing angle and strength of the cold air on the film. By selecting the appropriate diameter of the support roller 601, the cold air can cover the film surface more evenly, improving the cooling efficiency and uniformity.

[0035] like Figure 1 , Figure 2 As shown, a flattening roller 504 and a limiting roller 505 are rotatably provided on one side of the main support 1 through a bearing seat, so that the flattening roller 504 can be flexibly rotated and adjusted according to production needs. In the production process of the plastic film 4, the flattening roller 504 plays a key role. It helps to flatten the film and remove wrinkles, ensuring the flatness and smoothness of the film. Through the rotation setting of the bearing seat, the flattening roller 504 can easily adapt to films of different specifications and thicknesses, thereby improving the versatility and flexibility of the equipment. At the same time, a limiting roller 505 is also rotatably provided on the main support 1. The main function of the limiting roller 505 is to limit the deviation and shaking of the film during the flattening process, ensuring that the film can stably pass through the flattening roller 504. By working in coordination with the flattening roller 504, the limiting roller 505 helps to further improve the flatness and quality of the film.

[0036] like Figure 1 , Figure 2 As shown, three groups of cold water rollers 3 are arranged on the top of the auxiliary bracket 2. The cold water rollers 3 are connected with the external coolant storage device through a liquid pump, ensuring that the plastic film 4 can be fully cooled when passing through the cold water rollers 3. The cold water rollers 3 are cooling elements that are in direct contact with the film, and the number and position of the cold water rollers 3 are crucial to the cooling effect. The configuration of three groups of cold water rollers 3 not only increases the contact area between the film and the cold water rollers 3, but also prolongs the residence time of the film on the cold water rollers 3, thereby improving the cooling efficiency and uniformity. At the same time, the cold water rollers 3 are connected with the external coolant storage device through a liquid pump, ensuring the continuous supply and circulation of the coolant. The liquid pump, as a power source, can extract the coolant from the storage device and transport it to the inside of the cold water rollers, providing continuous cooling capacity for the cold water rollers 3.

[0037] like Figure 1 , Figure 2 As shown, the three groups of cold water rollers 3 are arranged in a staggered structure, so that each group of cold water rollers 3 can independently cool the plastic film 4, while avoiding the occurrence of cooling blind spots. The staggered arrangement means that the positions between each group of cold water rollers 3 are not completely overlapping, but have a certain offset, so that when the film passes through, each group of cold water rollers 3 can contact the upper and lower surfaces of the film, thereby achieving comprehensive cooling of the film. At the same time, the staggered structure arrangement also helps to improve the cooling efficiency and uniformity. Since each group of cold water rollers 3 can act on the film independently, the cooling intensity and temperature can be controlled more accurately to ensure that the film can be evenly and fully cooled when passing through the cold water rollers 3.

[0038] In the implementation, the extruded plastic film 4 first bypasses three groups of cold water rollers 3, and then bypasses the first transport roller 501, the support roller 601, the second transport roller 502, and the third transport roller 503. Then, it is wound around the limiting rollers 505 on one side of the main bracket 1. After that, the existing film winding mechanism winds up the plastic film 4 for subsequent processing and placement. During this flattening process, first, a liquid pump is used to conduct the coolant in the external coolant storage device into the interiors of the three groups of cold water rollers 3. As the plastic film 4 is transported on the surfaces of the three groups of cold water rollers 3, heat exchange is carried out between the internal coolant and the heat on the plastic film 4 to achieve the water cooling operation of the plastic film 4. As the plastic film 4 is transported, for the plastic film 4 wound around the surface of the support roller 601, cold air is blown by an external air cooler through the air inlet 604 into the inside of the air guide cylinder 602 and blown from the air guide cylinder 602 onto the surface of the plastic film 4, thereby realizing the blowing and cooling of the plastic film 4 on the surface of the support roller 601. Subsequently, the air flow that has exchanged heat is discharged from the overflow port 603 to prevent the air flow from blowing onto the unsupported plastic film area and avoid the situation of film wrinkling. In this application, the support roller 601 supports the plastic film 4 to be air-cooled to prevent the plastic film 4 from shaking and wrinkling during the air-cooling process, thereby realizing a cooling method in which air cooling and water cooling coexist and cooperate with each other, and improving the cooling effect on the plastic film 4.

[0039] The advantages in practical applications of this technical solution include but are not limited to the following points:

[0040] This application realizes the coexistence and cooperation of two cooling methods, air cooling and water cooling. The supporting function of the support roller and the reasonable design of the air guide cylinder and the overflow port jointly ensure the flatness and cooling effect of the plastic film during the cooling process, thus meeting the requirements for high-quality plastic films on the production line.

[0041] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flattening device for plastic bag processing, characterized in that: It includes a main bracket (1), a sub-bracket (2), and a plastic film (4). At the top of the main bracket (1), a first transport roller (501), a second transport roller (502), and a third transport roller (503) are rotatably arranged through bearing seats. An air-cooling mechanism (6) is arranged inside the main bracket (1). The air-cooling mechanism (6) includes a support roller (601). On one side below the support roller (601), there is an air guide cylinder (602). Overflow air outlets (603) are provided on both sides of the air guide cylinder (602). On one side below the air guide cylinder (602), there is an air inlet (604).

2. The leveling device for plastic bag processing according to claim 1, characterized in that, The air guide cylinder (602) is connected to an external air cooler through the air inlet (604), and the air outlet of the air guide cylinder (602) is opposite to the position of the support roller (601).

3. A flattening device for plastic bag processing according to claim 1, characterized in that, The opening directions of the overflow air outlets (603) on both sides of the air guide cylinder (602) are parallel to the axial direction of the support roller (601) to avoid the discharged air flow affecting the plastic film (4).

4. The leveling device for plastic bag processing according to claim 1, characterized in that, The support roller (601) has two but not limited to two structural forms with different diameter sizes.

5. A flattening device for plastic bag processing according to claim 1, characterized in that, On one side of the main bracket (1), a flattening roller (504) and a limiting roller (505) are rotatably arranged through bearing seats.

6. A flattening device for plastic bag processing according to claim 1, characterized in that, On the top of the sub-bracket (2), there are three groups of cold water rollers (3). The cold water rollers (3) are connected to an external coolant storage device through a liquid pump.

7. The leveling device for plastic bag processing according to claim 6, characterized in that, The three groups of cold water rollers (3) are arranged in a staggered structure.

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