Improved structure of air ring of film blowing machine
The wind ring structure with a chromium coating and grooves addresses plastic adhesion issues by forming a liquid-gas-solid interface, improving film quality and efficiency.
Patent Information
- Application Number
- CN202422262295.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-14
AI Technical Summary
The air ring of the existing film blower is easy to adhere to plastic and is not easy to clean, which affects the film quality and equipment life.
Plating and grooves are provided on the surface of the air ring to reduce surface tension, form a liquid-gas-solid phase structure, reduce plastic adhesion, and use the plating and grooves to capture air to form a bubble layer to avoid direct contact.
It reduces the risk of adhesion between plastic and air ring, improves film quality and production efficiency, simplifies the cleaning process, and extends the service life of the equipment.
Smart Images
Figure CN223099940U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of plastic processing, and specifically relates to an improved structure of a wind ring of a film blowing machine. Background Art
[0002] The wind ring of a film blowing machine is a key component in plastic extrusion film blowing equipment, which is used to form and control the bubble of a plastic film. Its main function is to provide uniform cooling and stable air flow to ensure the quality and uniformity of the film. The wind ring is usually installed at the top of the film blowing machine and surrounds the die head. Its internal structure includes multiple air ducts and air outlets, and these designs enable cold air to be evenly blown onto the just extruded plastic melt. In this way, the plastic film forms bubbles during the cooling process, and these bubbles stretch the melt into a film shape. If plastic adhesion problems occur during the production process of the existing wind ring of a film blowing machine, and if not cleaned in time, it will seriously affect the effect of the next film blowing, and even damage the overall performance of the film blowing machine. When the equipment is shut down, the plastic melt remaining on the wind ring will quickly cool and agglomerate, forming a hard solid, which makes the cleaning work extremely difficult. These agglomerates not only increase the difficulty of subsequent cleaning, but may also interfere with the normal air flow of the wind ring, resulting in uneven cooling, thus having a negative impact on the quality of the film. Since the cooled plastic agglomerates are very firm, traditional cleaning methods such as scraping with a scraper are not only inefficient, but the effect is often not ideal. This manual cleaning method not only takes time and effort, but may also cause scratches or damage to the surface of the wind ring, further affecting the service life and production stability of the equipment.
[0003] In summary, the existing wind ring has the problems of being prone to plastic adhesion and inconvenient plastic cleaning. Summary of the Utility Model
[0004] In view of this, the utility model provides an improved structure of a wind ring of a film blowing machine, which can solve the problems that the existing wind ring is prone to plastic adhesion and inconvenient plastic cleaning.
[0005] The utility model is implemented as follows:
[0006] The utility model provides an improved structure of a wind ring of a film blowing machine, which includes a wind ring. The wind ring includes a wind ring body, wind ring pieces and air outlets. The wind ring body is of a cylindrical structure, and an air outlet is arranged at the center of the wind ring body. The wind ring body is fixedly connected to the air outlet. Wind ring pieces are arranged on the wind ring body. The wind ring pieces are formed by sequentially sleeving multiple coaxial rings, and the height of the outer ring in the adjacent coaxial rings of the wind ring pieces is higher than that of the inner ring. The wind ring pieces are fixedly connected to the wind ring body. A coating is arranged on the surfaces of the wind ring body and the wind ring pieces, and the coating is used to reduce the surface tension of the wind ring body and the wind ring pieces.
[0007] The technical effects of an improved structure of the air ring of a blown film machine provided by the present utility model are as follows: By setting the coating layer and the grooves, the surface tension of the air ring body and the air ring pieces can be reduced, so that there is air between the plastic and the air ring, and the plastic does not directly contact the surface of the air ring, but forms a liquid phase-gas phase-solid phase structure, greatly reducing the risk of adhesion. The low surface tension structure can improve the fluidity of the plastic melt, help reduce the adhesion of the plastic on the surface of the air ring, and improve the quality and production efficiency of the finished film.
[0008] On the basis of the above technical solution, an improved structure of the air ring of a blown film machine of the present utility model can be further improved as follows:
[0009] Among them, the coating layer is made of chromium.
[0010] The beneficial effects of adopting the above improvement scheme are: Chromium has good thermal stability, and heating will not affect the key dimensions of the air ring; excellent corrosion resistance and hardness make it more durable.
[0011] Further, the surface of the coating layer is provided with uniformly arranged grooves for sealing air.
[0012] Further, the grooves are of a cylindrical structure.
[0013] Further, the diameter range of the grooves is 0.5 - 10 mm.
[0014] Further, the height of the grooves is 0.5 - 1 times the diameter of the grooves.
[0015] Further, the liquid plastic adhered to the air ring pieces forms a liquid, gas, and solid three-phase region with the grooves.
[0016] Further, the grooves are filled with gas, and the line where the plastic meets the upper top surface of the air in the grooves is the liquid phase-gas phase boundary line.
[0017] Further, the line where the gas is flush with the lower bottom surface of the grooves is the solid phase-gas phase boundary line.
[0018] Further, the air ring body and the air ring pieces are made of aluminum alloy.
[0019] Compared with the prior art, the beneficial effects of an improved structure of the air ring of a blown film machine provided by the present utility model are: By setting the coating layer and the grooves, the surface tension of the air ring body and the air ring pieces can be reduced, so that there is air between the plastic and the air ring, and the plastic does not directly contact the surface of the air ring, but forms a liquid phase-gas phase-solid phase structure, greatly reducing the risk of adhesion. The low surface tension structure can improve the fluidity of the plastic melt, help reduce the adhesion of the plastic on the surface of the air ring, and improve the quality and production efficiency of the finished film. Description of the Drawings
[0020] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0021] Figure 1 It is a structural schematic diagram of an improved structure of a blown film machine air ring;
[0022] Figure 2 It is a top view of the coating layer of an improved structure of a blown film machine air ring;
[0023] Figure 3 It is a cross-sectional view of the coating layer of an improved structure of a blown film machine air ring;
[0024] In the drawings, the list of components represented by each reference numeral is as follows:
[0025] 10. Air ring body; 11. Air ring piece; 12. Air outlet; 13. Coating layer; 14. Groove. Specific embodiments
[0026] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model.
[0027] As Figures 1-3 shown, it is an embodiment of an improved structure of a blown film machine air ring provided by the present utility model. In this embodiment, it includes an air ring. The air ring includes an air ring body 10, an air ring piece 11 and an air outlet 12. The air ring body 10 is of a cylindrical structure. An air outlet 12 is provided at the center of the air ring body 10. The air ring body 10 is fixedly connected to the air outlet 12. An air ring piece 11 is provided on the air ring body 10. The air ring piece 11 is formed by sequentially sleeving multiple coaxial rings. And among the adjacent coaxial rings in the air ring piece 11, the height of the ring located on the outer side is higher than that of the ring located on the inner side. The air ring piece 11 is fixedly connected to the air ring body 10. A coating layer 13 is provided on the surfaces of the air ring body 10 and the air ring piece 11. The coating layer 13 is used to reduce the surface tension of the surfaces of the air ring body 10 and the air ring piece 11.
[0028] Surface tension refers to the contraction effect exhibited by the molecules on the liquid surface due to the intermolecular interaction forces. This effect makes the liquid surface seem to be tightened, showing a tendency for the liquid surface to contract and form the smallest surface area.
[0029] Among them, in the above technical solution, the coating layer 13 is made of chromium.
[0030] Further, in the above technical solution, grooves 14 are provided on the surface of the coating layer 13, and the grooves 14 are used for sealing air.
[0031] Further, in the above technical solution, the groove 14 is of a cylindrical structure.
[0032] Further, in the above technical solution, the diameter range of the groove 14 is 0.5 - 10 mm.
[0033] Further, in the above technical solution, the height of the groove 14 is 0.5 - 1 times the diameter of the groove 14.
[0034] Further, in the above technical solution, the liquid plastic adhered to the air ring piece 11 and the groove 14 form a liquid, gas, and solid three-phase region.
[0035] Further, in the above technical solution, the groove 14 is filled with gas, and the line where the plastic meets the upper top surface of the air in the groove 14 is the liquid-gas interface line.
[0036] Further, in the above technical solution, the line where the gas is flush with the lower bottom surface of the groove 14 is the solid-gas interface line.
[0037] Further, in the above technical solution, the air ring body 10 and the air ring piece 11 are made of aluminum alloy.
[0038] By laser texturing the surface of the air ring, specific grooves 14 are formed. These groove textures can capture and store air. When the plastic melt flows in these grooves 14, the air is trapped at the bottom of the grooves 14, forming a bubble layer. The presence of the coating layer 13 enables the plastic to contact the coating layer 13 instead of directly contacting the air ring, avoiding the adhesion of the plastic melt to the air ring. When cleaning the surface of the air ring, a scraper is no longer needed, saving cleaning time and improving work efficiency.
[0039] Specifically, the principle of the present utility model is: By laser texturing the surface of the air ring, specific grooves 14 are formed. These groove textures can capture and store air. When the plastic melt flows in these grooves 14, the air is trapped at the bottom of the grooves 14, forming a bubble layer. The presence of the coating layer 13 enables the plastic to contact the coating layer 13 instead of directly contacting the air ring, avoiding the adhesion of the plastic melt to the air ring. When cleaning the surface of the air ring, a scraper is no longer needed, saving cleaning time and improving work efficiency.
Claims
1. An improved structure of the air ring of a blown film machine, characterized in that, It includes an air ring, and the air ring includes an air ring body (10), air ring pieces (11) and air outlets (12). The air ring body (10) is of a cylindrical structure. An air outlet (12) is arranged at the center of the air ring body (10), and the air ring body (10) is fixedly connected to the air outlet (12). The air ring pieces (11) are arranged on the air ring body (10). The air ring pieces (11) are formed by sequentially sleeving a plurality of coaxial rings, and the height of the ring located on the outer side in adjacent coaxial rings of the air ring pieces (11) is higher than that of the ring located on the inner side. The air ring pieces (11) are fixedly connected to the air ring body (10). A coating layer (13) is arranged on the surfaces of the air ring body (10) and the air ring pieces (11), and the coating layer (13) is used to reduce the surface tension of the air ring body (10) and the air ring pieces (11).
2. The improved structure of the air ring of a blown film machine according to claim 1, wherein, The coating layer (13) is made of chromium.
3. An improved structure of the air ring of a blown film machine according to claim 2, characterized in that, Uniformly arranged grooves (14) are arranged on the surface of the coating layer (13), and the grooves (14) are used to seal air.
4. An improved structure of the air ring of a blown film machine according to claim 3, characterized in that, The grooves (14) are of a cylindrical structure.
5. An improved structure of the air ring of a blown film machine according to claim 4, characterized in that, The diameter range of the grooves (14) is 0.5 - 10 mm.
6. The improved structure of the air ring of a blown film machine according to claim 5, characterized in that, The height of the grooves (14) is 0.5 - 1 times the diameter of the grooves (14).
7. An improved structure of the air ring of a blown film machine according to claim 6, characterized in that, The liquid plastic adhered to the air ring pieces (11) and the grooves (14) form a liquid-gas-solid three-phase region.
8. An improved structure of the air ring of a blown film machine according to claim 7, characterized in that, Gas is enclosed in the grooves (14), and the line where the plastic and the upper top surface of the air in the grooves (14) are demarcated is the liquid-phase and gas-phase boundary line.
9. An improved structure of a blown film machine air ring according to claim 8, characterized in that, The line where the gas is flush with the lower bottom surface of the grooves (14) is the solid-phase and gas-phase boundary line.
10. The improved structure of the air ring of a blown film machine according to claim 9, characterized in that, The air ring body (10) and the air ring pieces (11) are made of aluminum alloy.