A cooling device for air ring of film blowing machine
By setting an enclosed protective structure and flexible contact sponge blocks on the blown film machine's air ring, the problems of uneven cooling and easy damage to the film bubble are solved, improving film quality and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN JIUSHENG PLASTIC MASCH CO LTD
- Filing Date
- 2025-08-01
- Publication Date
- 2026-06-26
AI Technical Summary
During the cooling process of the blown film machine's air ring, the film bubble is easily affected by external airflow disturbances and vibrations, resulting in uneven cooling, uneven film thickness, wrinkles, and cracks. Furthermore, the film bubble is easily damaged by external objects, affecting production quality and efficiency.
Design a blown film machine air ring cooling device, including a lower fixed protection structure and an upper telescopic protection structure. The device forms an enclosed protection by installing a base ring and a conical protective cylinder, combined with flexible contact of a sponge block to limit the swaying of the film bubble and isolate external objects, ensuring smooth cooling airflow.
It effectively prevents membrane bubble swaying and external collisions, ensures the uniformity of cooling air, improves film thickness uniformity, transparency and mechanical properties, reduces production costs and improves efficiency.
Smart Images
Figure CN224408215U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of blown film machine air rings, and in particular to a blown film machine air ring cooling device. Background Technology
[0002] In the field of plastic film production, blown film machines are key equipment for heating and melting plastic granules and then blowing them into films. The blown film machine's air ring, as one of its core components, primarily functions to blow uniform cooling air through an annular air duct onto the high-temperature film bubble just extruded from the die, allowing the film bubble to cool and solidify rapidly, thereby ensuring the film's thickness uniformity, transparency, and mechanical properties. The cooling effect and stability of the air ring directly affect the film production quality and efficiency, thus playing a crucial role in the film production process.
[0003] However, in actual production, the film bubble cooled by the air ring is easily disturbed by external airflow (such as airflow generated by the operation of the workshop ventilation system, the operation of surrounding equipment, or airflow caused by personnel movement) during the upward pulling and forming process. Vibrations generated by the operation of the blown film machine and surrounding auxiliary equipment are also transmitted to the film bubble via the frame or air. Furthermore, slight deviations in the pulling speed and tension control during the pulling process can lead to uneven internal tension, causing the film bubble to sway. When the swaying amplitude is large, it will disrupt the stable contact between the film bubble and the cooling air of the air ring, resulting in uneven cooling and causing problems such as uneven film thickness and wrinkles, directly affecting the production quality of the plastic film bags. In addition, without protection, the film bubble may be directly damaged by accidental contact with external objects (such as tools, equipment parts in the workshop, or accidental contact by operators), causing the film bubble to rupture or tear. This not only requires machine shutdown and increases production costs but also reduces production efficiency. Therefore, this application proposes an air ring cooling device for a blown film machine to solve the above problems. Utility Model Content
[0004] The main objective of this invention is to provide a blown film machine air ring cooling device, which can effectively solve the problems in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A blown film machine air ring cooling device includes a blown film machine air ring body. A lower fixed protection structure is fixedly installed at the upper end of the blown film machine air ring body. The lower fixed protection structure consists of a mounting base ring and a conical protective cylinder. The conical protective cylinder is fixedly installed at the upper end of the mounting base ring. Several upper telescopic protection structures are fixedly installed in a ring shape at the upper end of the conical protective cylinder. The upper telescopic protection structure consists of an arc-shaped fixed plate, a first sponge block, an arc-shaped moving plate, and a second sponge block. The first sponge block is fixedly installed on the inner wall of the arc-shaped fixed plate, the second sponge block is fixedly installed on the inner wall of the arc-shaped moving plate, and the arc-shaped moving plate is fixedly installed on the outer wall of the arc-shaped fixed plate by bolts.
[0007] Preferably, a number of air inlet pipes are symmetrically fixedly installed on the outer wall of the blown film machine air ring body.
[0008] Preferably, the mounting base ring on the lower fixed protective structure is fixedly installed on the upper end of the blown film machine air ring body by bolts, and the conical protective cylinder is provided with a number of ventilation holes, which penetrate through the inside and outside of the conical protective cylinder.
[0009] Preferably, the arc-shaped fixing plate on the upper telescopic protection structure is fixedly installed on the upper end of the conical protective cylinder on the lower fixed protection structure. The upper part of the arc-shaped fixing plate is provided with an installation hole, which penetrates the arc-shaped fixing plate inside and out.
[0010] Preferably, the arc-shaped movable plate on the upper telescopic protective structure is provided with a mounting guide groove, which runs through the inside and outside of the arc-shaped movable plate. The second sponge block is located above the mounting guide groove and is also located above the arc-shaped fixed plate.
[0011] Preferably, the bolts used to fix the arc-shaped fixed plate and the arc-shaped movable plate are installed in the mounting holes opened on the arc-shaped fixed plate and the mounting guide groove opened on the arc-shaped movable plate.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] By installing a lower fixed protection structure consisting of a mounting base ring and a conical protective cylinder at the upper end of the blown film machine's air ring body, and an upper telescopic protection structure consisting of an arc-shaped fixing plate, a first sponge block, an arc-shaped moving plate, and a second sponge block at the upper end of the lower fixed protection structure, the lower fixed protection structure and the upper telescopic protection structure can form a surrounding protection for the film bubble, limiting the film bubble and preventing large-scale shaking. The conical protective cylinder of the lower fixed protection structure is adapted to the shape of the lower part of the film bubble, and the upper telescopic protection structure, through the cooperation of the arc-shaped fixing plate and the arc-shaped moving plate, can adjust the surrounding range according to the required protection height range of the film bubble, enhancing adaptability. Meanwhile, the first and second sponge blocks are in flexible contact with the membrane bubble, which can further limit the swaying of the membrane bubble and avoid hard damage to the membrane bubble, ensuring that the membrane bubble cools and sets in a stable state, which is beneficial to improving the uniformity of film thickness, transparency and mechanical properties. At the same time, the lower fixed protection structure and the upper telescopic protection structure can block the membrane bubble from external objects, reducing the probability of the membrane bubble being accidentally touched by external objects, thereby reducing the probability of membrane bubble damage. In addition, the vent holes on the conical protective cylinder can ensure the flow of cooling air, avoiding the setting of the protective structure from affecting the cooling effect of the air ring, ensuring that the membrane bubble can be continuously subjected to uniform cooling air, improving production quality and efficiency. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the lower fixed protective structure and the upper telescopic protective structure of this utility model;
[0016] Figure 3 This is an exploded view of the upper telescopic protective structure of this utility model.
[0017] In the diagram: 1. Main body of the blown film machine air ring; 2. Lower fixed protection structure; 3. Upper telescopic protection structure; 4. Mounting base ring; 5. Conical protective cylinder; 6. Ventilation hole; 7. Arc-shaped fixing plate; 8. Mounting hole; 9. First sponge block; 10. Arc-shaped moving plate; 11. Mounting guide rail groove; 12. Second sponge block; 13. Air inlet pipe. Detailed Implementation
[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0019] Please see Figure 1 , Figure 2 , Figure 3As shown, a blown film machine air ring cooling device includes a blown film machine air ring body 1. A lower fixed protective structure 2 is fixedly installed at the upper end of the blown film machine air ring body 1. The lower fixed protective structure 2 consists of a mounting base ring 4 and a conical protective cylinder 5. The conical protective cylinder 5 is fixedly installed at the upper end of the mounting base ring 4. Several upper telescopic protective structures 3 are fixedly installed in a ring shape at the upper end of the conical protective cylinder 5. The upper telescopic protective structure 3 consists of an arc-shaped fixed plate 7, a first sponge block 9, an arc-shaped moving plate 10, and a second sponge block 12. The first sponge block 9... The first sponge block 9 is fixedly installed on the inner wall of the arc-shaped fixed plate 7, and the second sponge block 12 is fixedly installed on the inner wall of the arc-shaped moving plate 10. The arc-shaped moving plate 10 is fixedly installed on the outer wall of the arc-shaped fixed plate 7 by bolts. A lower fixed protection structure 2 consisting of a mounting base ring 4 and a conical protective cylinder 5 is set at the upper end of the blown film machine air ring body 1. An upper telescopic protection structure 3 consisting of an arc-shaped fixed plate 7, a first sponge block 9, an arc-shaped moving plate 10, and a second sponge block 12 is set at the upper end of the lower fixed protection structure 2. The upper telescopic protective structure 3 and the lower fixed protective structure 2 form a surrounding protection for the membrane bubble, limiting its movement and preventing significant swaying. The conical protective cylinder 5 of the lower fixed protective structure 2 is adapted to the shape of the lower part of the membrane bubble. The upper telescopic protective structure 3, through the cooperation of the arc-shaped fixed plate 7 and the arc-shaped moving plate 10, can adjust the surrounding range according to the required protection height of the membrane bubble, enhancing adaptability. At the same time, the first sponge block 9 and the second sponge block 12 are in flexible contact with the membrane bubble, which can further limit the swaying of the membrane bubble and avoid causing rigid damage to the membrane bubble. Damage is prevented, ensuring the membrane bubble cools and sets in a stable state, which helps improve the uniformity of film thickness, transparency, and mechanical properties. At the same time, the lower fixed protective structure 2 and the upper telescopic protective structure 3 can block the membrane bubble from external objects, reducing the probability of the membrane bubble being accidentally touched by external objects, thereby reducing the probability of membrane bubble damage. In addition, the vent holes 6 on the conical protective cylinder 5 can ensure the flow of cooling air, avoiding the impact of the cooling effect of the air ring due to the setting of the protective structure, ensuring that the membrane bubble can be continuously subjected to uniform cooling air, and improving production quality and efficiency.
[0020] Several air inlet pipes 13 are symmetrically fixed on the outer wall of the blown film machine air ring body 1. The mounting base ring 4 on the lower fixed protection structure 2 is fixedly installed on the upper end of the blown film machine air ring body 1 by bolts. Several ventilation holes 6 are opened on the conical protective cylinder 5, which penetrate through the inside and outside of the conical protective cylinder 5. The arc-shaped fixing plate 7 on the upper telescopic protection structure 3 is fixedly installed on the upper end of the conical protective cylinder 5 on the lower fixed protection structure 2. The upper part of the arc-shaped fixing plate 7 has a mounting hole 8, which penetrates through the inside and outside of the arc-shaped fixing plate 7. The arc-shaped moving plate 10 on the upper telescopic protection structure 3 has a mounting guide groove 11, which penetrates through the inside and outside of the arc-shaped moving plate 10. The second sponge block 12 is located above the mounting guide groove 11 and also above the arc-shaped fixing plate 7. Bolts are used to fix the arc-shaped fixing plate 7 and the arc-shaped moving plate 10. The inner diameter of the conical protective cylinder 5 is slightly larger than the diameter of the membrane bubble, installed in the mounting holes 8 on the arc-shaped fixed plate 7 and the mounting guide grooves 11 on the arc-shaped moving plate 10. This size setting allows the membrane bubble to pass smoothly through the inside of the conical protective cylinder 5, and also uses the inner wall of the conical protective cylinder 5 to initially limit the membrane bubble, reducing the swaying space of the membrane bubble in the lower region. At the same time, it will not squeeze the membrane bubble due to the inner diameter being too small, affecting its normal molding. The inner diameter of the ring formed by the first sponge block 9 and the second sponge block 12 on several upper telescopic protective structures 3 is slightly larger than the diameter of the membrane bubble, so that the first sponge block 9 and the second sponge block 12 can form a flexible surrounding ring around the membrane bubble. This can further limit the swaying amplitude of the membrane bubble, prevent the membrane bubble from shifting significantly, and also avoid hard contact with the membrane bubble and damage to the membrane bubble through the flexibility of the sponge block, ensuring that the membrane bubble cools and solidifies in a stable space.
[0021] First, adjust the position of the arc-shaped moving plate 10 in the upper telescopic protection structure 3 according to the required height range of the film bubble. At this time, first loosen the bolts between the arc-shaped fixed plate 7 and the arc-shaped moving plate 10, and then push the arc-shaped moving plate 10 to move along the mounting guide groove 11. When the height of the upper telescopic protection structure 3 matches the required height range of the film bubble, tighten the bolts to fix the arc-shaped moving plate 10 and the arc-shaped fixed plate 7 together. When producing film plastic bags, plastic granules are added to the hopper of the blown film machine, heated and melted by the screw, and then extruded through the die head to form a tubular film bubble. After the film bubble is extruded from the die head, the blown film machine air ring body 1 is vented. Cooling air is introduced through the air inlet pipe 13 to cool and shape the membrane bubble. At the same time, the vent holes 6 on the conical protective cylinder 5 ensure the flow of cooling air. During the rise of the membrane bubble, the lower fixed protective structure 2 and the upper telescopic protective structure 3 surround and protect the membrane bubble. The conical protective cylinder 5 of the lower fixed protective structure 2 limits the lower part of the membrane bubble. The first sponge block 9 and the second sponge block 12 of the upper telescopic protective structure 3 flexibly contact the membrane bubble to further limit the swaying of the membrane bubble and complete the stable cooling and shaping of the membrane bubble. After cooling, the membrane bubble is pulled upward by the traction device, and then the membrane bubble is flattened by the herringbone plate. Finally, the film is wound into a roll by the winding device.
[0022] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A blown film machine air ring cooling device, comprising a blown film machine air ring body (1), characterized in that: The upper end of the blown film machine air ring body (1) is fixedly installed with a lower fixed protection structure (2). The lower fixed protection structure (2) consists of an installation base ring (4) and a conical protective cylinder (5). The conical protective cylinder (5) is fixedly installed on the upper end of the installation base ring (4). The upper end of the conical protective cylinder (5) is fixedly installed with several upper telescopic protection structures (3) in a ring shape. The upper telescopic protection structure (3) consists of an arc-shaped fixed plate (7), a first sponge block (9), an arc-shaped moving plate (10), and a second sponge block (12). The first sponge block (9) is fixedly installed on the inner wall of the arc-shaped fixed plate (7). The second sponge block (12) is fixedly installed on the inner wall of the arc-shaped moving plate (10). The arc-shaped moving plate (10) is fixedly installed on the outer wall of the arc-shaped fixed plate (7) by bolts.
2. The blown film machine air ring cooling device according to claim 1, characterized in that: Several air inlet pipes (13) are symmetrically fixed on the outer wall of the blown film machine air ring body (1).
3. The blown film machine air ring cooling device according to claim 2, characterized in that: The mounting base ring (4) on the lower fixed protective structure (2) is fixedly installed on the upper end of the blown film machine air ring body (1) by bolts. The conical protective cylinder (5) has several ventilation holes (6) that penetrate the conical protective cylinder (5) inside and out.
4. The blown film machine air ring cooling device according to claim 3, characterized in that: The arc-shaped fixing plate (7) on the upper telescopic protective structure (3) is fixedly installed on the upper end of the conical protective cylinder (5) on the lower fixed protective structure (2). The upper part of the arc-shaped fixing plate (7) is provided with an installation hole (8), which penetrates the arc-shaped fixing plate (7) inside and out.
5. The blown film machine air ring cooling device according to claim 4, characterized in that: The upper telescopic protective structure (3) has an arc-shaped moving plate (10) with an installation guide groove (11) that runs through the inside and outside of the arc-shaped moving plate (10). The second sponge block (12) is located above the installation guide groove (11) and is also located above the arc-shaped fixing plate (7).
6. The blown film machine air ring cooling device according to claim 5, characterized in that: Bolts for fixing the arc-shaped fixed plate (7) and the arc-shaped moving plate (10) are installed in the mounting holes (8) on the arc-shaped fixed plate (7) and the mounting guide grooves (11) on the arc-shaped moving plate (10).