Film bubble blowing device of film blowing machine

Abstract

The utility model belongs to the technical field of film blowing machines, and particularly relates to a film bubble blowing device of a film blowing machine, which comprises an air ring shell, a plurality of air inlet pipes are mounted on the side wall of the air ring shell, filter boxes are mounted on the air inlet pipes, threaded holes are formed in a sealing plate and a top plate of each filter box, screw rods are assembled in the threaded holes, and the air ring shell and the air ring shell are integrally formed. A top plate and a sealing plate of the filter box are provided with sealing strips, air holes are formed in the side wall of the filter box, a collecting frame is placed in the filter box, a round hole is formed in the collecting frame, a filter plate is fixedly installed in the round hole, a screw is screwed out of a threaded hole in an air inlet pipe, then the sealing plate is opened, and the collecting frame clamped in the filter box is taken out. At the moment, accumulated dust can be collected on the collecting frame, the collecting frame can take out the dust together, then the collecting frame and the filter plate on the collecting frame are cleaned, rapid cleaning of the filter plate is achieved, the filter plate can be rapidly detached and cleaned through the structure, and the detaching convenience of the filter structure can be improved.

Description

Technical Field

[0001] This utility model relates to the field of blown film machine technology, specifically a blown film machine bubble inflation device. Background Technology

[0002] Film blowing machines are key equipment widely used in the film blowing industry. In order to meet the requirements of film blowing molding process, a film bubble inflation device needs to be set on the coaxial line of the die head to meet the requirements of film bubble cooling and molding.

[0003] Chinese patent CN 114789550 A discloses an air ring for a blown film machine, including a volute and several outlet rings. The volute has an air inlet and an air inlet channel, and an outlet gap is provided between adjacent two outlet rings. The air inlet, air inlet channel, and outlet gap are sequentially connected. Corresponding to the air inlet, the air inlet channel has several guide fins inclined towards the inner side of the air inlet channel. A guide gap is provided between adjacent two guide fins, or a guide gap is formed between the guide fins and the inner side of the air inlet channel. Airflow enters the air inlet channel through the air inlet and passes through the guide fins inclined towards the inner side of the air inlet channel. The airflow rotates and flows along the inner side of the outer wall of the volute, forming a vortex fluid. The vortex fluid flows out evenly from the outlet gap of each outlet ring. This invention, through the above arrangement, causes the air to rotate and flow along the inner side of the outer wall of the volute, forming a vortex. This slows down the speed of the airflow towards the outlet gap, reduces air volume loss, and ensures that the gas flows evenly to each outlet gap, resulting in natural and uniform airflow.

[0004] In the process of blowing the film bubble, the existing blown film machine blowing device needs to filter the cold air to ensure that the cold air is free of dust. However, the filter structure cannot be quickly disassembled and cleaned, resulting in poor disassembly convenience. Therefore, a blown film machine bubble blowing device is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve the problems existing in the existing technology, this utility model proposes a film bubble inflation device for a blown film machine.

[0006] The technical solution adopted by this utility model to solve its technical problem is a film blowing machine bubble inflation device, including an air ring shell, multiple air inlet pipes installed on the side wall of the air ring shell, a filter box installed on the air inlet pipes, a sealing plate rotatably connected to the top plate of the filter box via a hinge, threaded holes opened on the sealing plate and the top plate of the filter box, a screw installed in the threaded hole, a knob installed on the screw, a sealing strip installed on the top plate and the sealing plate of the filter box, air holes opened on the side wall of the filter box, a collection rack placed inside the filter box, a round hole opened on the collection rack, and a fixed installation in the round hole. The filter plate has a material passage hole in the middle of the air ring shell, and an air chamber is set inside the air ring shell. Multiple small gears are rotatably mounted on the bottom plate of the air ring shell via a rotating shaft. By turning the knob, the screw is driven to rotate and unscrewed from the threaded hole on the air inlet pipe. Then, the sealing plate is lifted, and the collection rack stuck in the filter box is taken out. At this time, the collection rack will collect accumulated dust, and the collection rack will carry the dust out. Then, the collection rack and the filter plate on it are cleaned, realizing the quick cleaning of the filter plate. This structure can quickly disassemble and clean the filter plate, which is beneficial to improving the convenience of disassembling the filter structure.

[0007] Preferably, multiple small gears are meshed with a large gear, which is rotatably connected to the bottom plate of the air ring housing. A drive motor is mounted on the bottom side of the air ring housing via a base. The output shaft of the drive motor is fixedly connected to the rotating shaft of one of the small gears. A rotating plate is fixedly connected to the large gear and rotatably connected to the inner wall of the air ring housing. Multiple air guide plates are mounted on the rotating plate, and multiple connecting rods are mounted on the rotating plate. An upper lip is mounted on each connecting rod and rotatably connected to the air ring housing. A lower lip is installed on the inner wall, and the air outlet is located between the lower lip and the upper lip. A rotating plate drives multiple air guide plates on it to rotate. The multiple air guide plates guide the cold air blown in by multiple air inlets, so that the cold air is blown out of the air outlet in a uniform manner, ensuring the uniformity of the air volume. After the molten plastic passes through the material passage, it is cooled and inflated by the cold air blown out of the air outlet, gradually forming a film bubble. This structure can ensure the uniformity of the air volume, which is beneficial to improving the stability of the film bubble and the uniformity of the film thickness.

[0008] The advantages of this utility model are:

[0009] 1. This utility model uses a knob to rotate a screw, which is then unscrewed from the threaded hole on the air inlet pipe. After that, the sealing plate is lifted, and the collection rack stuck in the filter box is taken out. At this time, the collection rack will collect accumulated dust, and the collection rack will carry the dust out with it. Then, the collection rack and the filter plate on it are cleaned, which realizes the quick cleaning of the filter plate. This structure can quickly disassemble and clean the filter plate, which is beneficial to improving the convenience of disassembling the filter structure.

[0010] 2. This utility model uses a rotating plate to drive multiple air guide plates to rotate. The multiple air guide plates guide the cold air blown in by multiple air inlets, so that the cold air is blown out evenly from the air outlet, ensuring the uniformity of the air volume. After the molten plastic passes through the material passage, it is cooled and inflated by the cold air blown out of the air outlet, gradually forming a film bubble. This structure can ensure the uniformity of the air volume, which is beneficial to improving the stability of the film bubble and the uniformity of the film thickness. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a first-person perspective 3D structural diagram;

[0013] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the filter box;

[0014] Figure 3 This is a schematic diagram of the three-dimensional structure of the large gear;

[0015] Figure 4 A schematic diagram of the internal three-dimensional structure of the wind ring shell;

[0016] Figure 5 This is a schematic diagram of the three-dimensional structure of the air guide plate.

[0017] In the diagram: 1. Air ring housing; 2. Air inlet pipe; 3. Filter box; 4. Sealing plate; 5. Screw; 6. Knob; 7. Sealing strip; 8. Collection rack; 9. Filter plate; 10. Material passage hole; 11. Air chamber; 12. Small gear; 13. Large gear; 14. Drive motor; 15. Rotating plate; 16. Connecting rod; 17. Upper lip; 18. Lower lip; 19. Air outlet; 20. Air guide plate. Detailed Implementation

[0018] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] Please see Figure 1-2As shown, a blown film machine bubble inflation device includes an air ring housing 1, multiple air inlet pipes 2 installed on the side wall of the air ring housing 1, a filter box 3 installed on the air inlet pipes 2, a sealing plate 4 rotatably connected to the top plate of the filter box 3 via a hinge, threaded holes opened on the sealing plate 4 and the top plate of the filter box 3, a screw 5 installed in the threaded hole, a knob 6 installed on the screw 5, a sealing strip 7 installed on the top plate of the filter box 3 and the sealing plate 4, air holes opened on the side wall of the filter box 3, a collection rack 8 placed inside the filter box 3, a round hole opened on the collection rack 8, a filter plate 9 fixedly installed in the round hole, a material passage hole 10 in the middle of the air ring housing 1, an air chamber 11 provided inside the air ring housing 1, and multiple small gears 12 rotatably installed on the bottom plate of the air ring housing 1 via a rotating shaft; during operation, existing blown film machine inflation devices require filtering of cold air to ensure that the cold air is not mixed with dust during the blowing process of the film bubble. Because the filter structure cannot be quickly disassembled and cleaned, the ease of disassembly is poor. By simultaneously guiding cold air into multiple air inlets 2, the filter plate 9 in the filter box 3 intercepts and filters the dust in the cold air as it passes through the air inlet 2. After that, the cold air enters the air cavity 11. After long-term use, a lot of dust will accumulate in the filter box 3, which needs to be cleaned to prevent the filter plate 9 from clogging. By turning the knob 6, the screw 5 is turned and unscrewed from the threaded hole on the air inlet 2. Then, the sealing plate 4 is lifted, and the collection rack 8 stuck in the filter box 3 is taken out. At this time, the collection rack 8 will collect the accumulated dust, and the collection rack 8 will carry the dust out. Then, the collection rack 8 and the filter plate 9 on it are cleaned, which realizes the quick cleaning of the filter plate 9. This structure can quickly disassemble and clean the filter plate 9, which helps to improve the ease of disassembly of the filter structure.

[0020] Please see Figure 3-5As shown, multiple small gears 12 are meshed with a large gear 13 on their periphery. The large gear 13 is rotatably connected to the bottom plate of the air ring housing 1. A drive motor 14 is mounted on the bottom side of the air ring housing 1 via a base. The output shaft of the drive motor 14 is fixedly connected to the rotating shaft of one of the small gears 12. A rotating plate 15 is fixedly connected to the large gear 13. The rotating plate 15 is rotatably connected to the inner wall of the air ring housing 1. Multiple air guide plates 20 are mounted on the rotating plate 15. Multiple connecting rods 16 are mounted on the rotating plate 15. An upper lip 17 is mounted on the connecting rod 16. The upper lip 17 is rotatably connected to the air ring housing 1. A lower lip 18 is mounted on the inner wall of the air ring housing 1. The air outlet 19 is located between the lower lip 18 and the upper lip 17. During operation, the existing blown film machine blowing device has difficulty ensuring uniform air volume during the blowing process of the film bubble. The uneven air volume and easy dispersion result in poor stability of the film bubble, affecting the thin film. The uniformity of the membrane thickness is achieved by cold air entering the air chamber 11, which is then driven by the motor 14. This motor drives one of the small gears 12 to rotate, which in turn drives the large gear 13 to rotate. The large gear 13 then drives multiple small gears 12 to rotate, ensuring the stable rotation of the large gear 13. The large gear 13 then drives the rotating plate 15 to rotate, which in turn drives multiple air guide plates 20 to rotate. The multiple air guide plates 20 guide the cold air blown in by multiple air inlets 2, ensuring that the cold air is blown out evenly from the air outlet 19 in a 360-degree pattern, thus ensuring the uniformity of the air volume. Afterward, the molten plastic extruded from the die passes through the material passage 10 and is cooled and inflated by the cold air blown out of the air outlet 19, gradually forming a membrane bubble. This structure ensures the uniformity of the air volume, which is beneficial to improving the stability of the membrane bubble and the uniformity of the membrane thickness.

[0021] Working principle: In the existing blown film machine, the blowing device needs to filter the cold air during the blowing process to ensure that the cold air is free of dust. However, the filter structure cannot be quickly disassembled and cleaned, resulting in poor ease of disassembly. By simultaneously guiding cold air into multiple air inlets 2, the filter plates 9 in the filter box 3 intercept and filter the dust in the cold air as it passes through the air inlets 2. The cold air then enters the air chamber 11. After prolonged use, a significant amount of dust accumulates in the filter box 3, requiring cleaning to prevent clogging of the filter plates 9. By turning the knob 6, the screw 5 rotates, unscrewing it from the threaded hole on the air inlet pipe 2. Then, the sealing plate 4 is lifted, and the collection rack 8, which is stuck inside the filter box 3, is removed. The collection rack 8 collects the accumulated dust and carries it out. The collection rack 8 and the filter plates 9 on it are then cleaned, achieving rapid cleaning of the filter plates 9. This structure allows for quick disassembly and cleaning of the filter plates 9, improving the ease of disassembly of the filter structure. During the blowing process of the film blowing machine's inflation device, it is difficult to ensure uniform airflow. Uneven airflow and easy dispersion lead to poor stability of the film bubble, affecting the uniformity of film thickness. Cold air enters the air chamber 11 and then drives the motor 14 to rotate one of the small gears 12. One of the small gears 12 drives the large gear 13 to rotate, which in turn drives multiple small gears 12 to rotate, achieving stable rotation of the large gear 13. Subsequently, the large gear 13 drives the rotating plate 15 to rotate. The rotating plate 15 drives multiple air guide plates 20 to rotate. The multiple air guide plates 20 guide the cold air blown in by multiple air inlets 2, so that the cold air is blown out evenly from the air outlet 19 in a 360-degree manner, ensuring the uniformity of the air volume. Then, the molten plastic extruded from the die head passes through the material passage 10 and is cooled and inflated by the cold air blown out of the air outlet 19, gradually forming a film bubble, thus realizing the inflation of the film bubble. This structure can ensure the uniformity of the air volume, which is beneficial to improving the stability of the film bubble and the uniformity of the film thickness.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A film bubble inflation device for a blown film machine, characterized in that: The device includes a wind ring housing (1), on which multiple air inlet pipes (2) are installed on the side wall. A filter box (3) is installed on the air inlet pipes (2). A sealing plate (4) is rotatably connected to the top plate of the filter box (3) via a hinge. Threaded holes are provided on the sealing plate (4) and the top plate of the filter box (3). A screw (5) is installed in the threaded hole. A knob (6) is installed on the screw (5). A sealing strip (7) is installed on the top plate of the filter box (3) and the sealing plate (4). An air hole is provided on the side wall of the filter box (3). A collection rack (8) is placed inside the filter box (3). A round hole is provided on the collection rack (8). A filter plate (9) is fixedly installed in the round hole. A material passage hole (10) is located in the middle of the wind ring housing (1). An air chamber (11) is provided inside the wind ring housing (1). Multiple small gears (12) are rotatably installed on the bottom plate of the wind ring housing (1) via a rotating shaft.

2. The film bubble inflation device for a blown film machine according to claim 1, characterized in that: Multiple small gears (12) are meshed with a large gear (13) on their periphery, and the large gear (13) is rotatably connected to the bottom plate of the wind ring shell (1).

3. The film bubble inflation device for a blown film machine according to claim 1, characterized in that: The bottom side of the air ring housing (1) is equipped with a drive motor (14) via a base, and the output shaft of the drive motor (14) is fixedly connected to the rotating shaft of one of the small gears (12).

4. The film bubble inflation device for a blown film machine according to claim 2, characterized in that: A rotating plate (15) is fixedly connected to the large gear (13). The rotating plate (15) is rotatably connected to the inner wall of the wind ring housing (1). Multiple air guide plates (20) are installed on the rotating plate (15).

5. The film bubble inflation device for a blown film machine according to claim 4, characterized in that: Multiple connecting rods (16) are installed on the rotating plate (15), and an upper lip (17) is installed on the connecting rod (16). The upper lip (17) is rotatably connected to the wind ring shell (1).

6. The film bubble inflation device for a blown film machine according to claim 1, characterized in that: The lower lip (18) is installed on the inner wall of the air ring shell (1), and the air outlet (19) is located between the lower lip (18) and the upper lip (17).

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