Center stabilizing rod
By designing a stabilizer bar that can control the opening and closing of the air outlet, the problem of film swaying caused by airflow impact in traditional blown film machines has been solved, improving the yield and film quality stability, and achieving improvements in film thickness uniformity and flatness.
Patent Information
- Application Number
- CN202520346303.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-28
AI Technical Summary
The airflow continuously blown from the bottom air outlet of the stabilizer bar in traditional blown film machines causes the film to shake during the later stages of film forming, which can easily lead to wrinkles and cracks, reducing the yield.
Design a centering rod, including a centering shaft, an inner shaft, and fasteners. The position of the inner shaft is controlled by loosening and tightening the fasteners, thereby opening and closing the air outlet and ensuring that the airflow is closed in the later stage of film forming to avoid airflow impact.
It effectively solves the problem of film shaking in the later stage of molding, improves the yield and quality stability of the film, ensures the uniformity of film thickness and flatness, and improves production efficiency.
Smart Images
Figure CN223821084U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of blown film machine technology, specifically to a core stabilizer. Background Technology
[0002] In the production process of blown film machines, the mandrel plays a crucial role. It stabilizes the position and direction of the blown film, assists in film shaping, and ensures that the film maintains a uniform thickness and stable shape during the blowing process, thereby improving film quality. Currently, most commercially available blown film machine mandrels are single-axis structures with air outlets at the bottom that communicate with a hollow core, such as the mandrel in the air ring structure of a biodegradable blown film machine described in application number CN2021213547479. During blown film operation, the continuous airflow from the air outlets at the bottom of the mandrel helps stabilize the shape and position of the film bubble in the early stages of film formation, playing a positive role in the initial film formation.
[0003] However, as the blown film process progresses into its later stages, the drawbacks of the continuous airflow from the bottom vents become increasingly apparent. Since the film bubble has largely stabilized by the later stages of formation, the sustained airflow impact causes the formed film to wobble. This wobble easily leads to wrinkles in the film, and in severe cases, even rupture, significantly reducing the product yield.
[0004] Based on the above background, this application proposes a novel stabilizing rod structure to solve the aforementioned problems. Utility Model Content
[0005] In view of the shortcomings of the prior art, this utility model provides a stabilizing rod.
[0006] The technical solution adopted in this utility model is: a stabilizing rod, comprising:
[0007] A centering shaft, wherein the centering shaft has a hollow hole inside, and an air outlet is provided at the bottom of the centering shaft that communicates with the hollow hole;
[0008] The inner shaft is fitted into the hollow hole of the centering shaft, and a vent hole is provided inside the inner shaft.
[0009] Fasteners for connecting the inner shaft and the centering shaft;
[0010] When the inner shaft and the centering shaft are fixedly connected by fasteners, the plug of the inner shaft separates from the vent hole, allowing the vent hole to communicate with the hollow hole. When the inner shaft separates from the centering shaft and the inner shaft falls, the plug of the inner shaft can block the vent hole, causing the vent hole to close with the hollow hole.
[0011] Furthermore, the bottom of the centering shaft has an external thread section for connection.
[0012] Furthermore, there are multiple air outlets, which are evenly spaced along the outer periphery of the centering shaft.
[0013] Furthermore, the hollow hole is divided into a coarse hole section, a medium hole section, and a fine hole section from top to bottom, and transition tapered holes are provided between the coarse hole section and the medium hole section, as well as between the medium hole section and the fine hole section.
[0014] Furthermore, the diameter of the coarse pore section is larger than that of the medium pore section, and the diameter of the medium pore section is larger than that of the fine pore section.
[0015] Furthermore, the top of the plug is chamfered.
[0016] Furthermore, the fastener is a pin, screw, or shaft.
[0017] Furthermore, it also includes a stabilizing sleeve fitted outside the centering shaft, the stabilizing sleeve being a frustoconical structure that is larger at the top and smaller at the bottom.
[0018] Furthermore, the stabilizing sleeve and the centering shaft are fixed together by screws.
[0019] Furthermore, an air gap is left between the inner shaft and the coarse hole section.
[0020] The beneficial effects of this utility model are:
[0021] 1. Effectively solves the problem of film swaying: In the later stage of blown film production, when the film has basically formed, the fasteners are loosened, the inner shaft falls, and its plug blocks the air outlet, preventing gas from continuing to blow out. This avoids the impact of continuous airflow on the formed film, thus effectively solving the film swaying phenomenon caused by continuous airflow from the bottom air outlet, reducing the risk of film wrinkles and cracks, and significantly improving the yield.
[0022] 2. Improved film quality stability: Traditional uniaxial mandrels cannot close the bottom vent holes, causing the film to be unstable due to airflow throughout the blowing process. This application, however, allows for flexible control of the vent opening and closing, enabling the vent holes to be closed after film formation. This ensures stable film formation at different stages, significantly improving film thickness uniformity, flatness, and stability, resulting in more consistent film quality and increased yield.
[0023] 3. Enhanced equipment adaptability and flexibility: Operators can decide whether to close the air outlet according to different stages of film blowing, achieving precise adjustment of the airflow to the stabilizer bar.
[0024] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of this utility model.
[0026] Figure 2 This is a side view of the present invention.
[0027] Figure 3 for Figure 2 A schematic diagram of the cross section of AA.
[0028] Figure 4 for Figure 3 Enlarged diagram of point B in the middle.
[0029] Figure 1-4 In the middle section: 1. Centering shaft; 2. Hole; 3. Vent hole; 4. Inner shaft; 5. Vent hole; 6. Fastener; 7. External thread section; 8. Coarse hole section; 9. Medium hole section; 10. Fine hole section; 11. Transition tapered hole; 12. Chamfer; 13. Centering sleeve; 14. Screw; 15. Air passage gap. Detailed Implementation
[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0032] This utility model provides a stabilizing rod.
[0033] In this embodiment, refer to Figure 1-4 The stabilizer includes:
[0034] A centering shaft 1, wherein the centering shaft 1 has a hollow hole 2 inside, and an air outlet 3 communicating with the hollow hole 2 is provided at the bottom of the centering shaft;
[0035] The inner shaft 4 is fitted into the hollow hole 2 of the centering shaft, and the inner shaft is provided with a vent hole 5.
[0036] Fastener 6, which is used to connect the inner shaft and the centering shaft;
[0037] When the inner shaft and the centering shaft are fixedly connected by fasteners, the plug of the inner shaft separates from the vent hole, allowing the vent hole to communicate with the hollow hole. When the inner shaft separates from the centering shaft and the inner shaft falls, the plug of the inner shaft can block the vent hole, causing the vent hole to close with the hollow hole.
[0038] In the above technical solution, the stabilizing rod includes a centering shaft, an inner shaft, and fasteners, enabling flexible opening and closing control of the vent holes at different stages of film blowing. In the early stage of film formation, the open vent holes can help stabilize the film bubble; in the later stage, closing the vent holes effectively avoids airflow interference with the formed film, significantly improving the quality and yield of the finished film, and solving the key technical problems of traditional stabilizing rods.
[0039] In practical use, the air vent is opened in the early stage of blown film. After the film has formed to a certain stage, the fasteners are loosened and the inner shaft falls naturally to block the air vent.
[0040] Specifically, the bottom of the centering shaft has an external thread section 7 for connection.
[0041] In this embodiment, the external threaded section at the bottom of the centering shaft facilitates connection with other components, such as the mold of a blown film machine.
[0042] Specifically, there are multiple air outlets 3, which are evenly spaced along the outer periphery of the centering shaft.
[0043] In this embodiment, multiple air outlets are evenly spaced along the outer periphery of the centering axis, which allows the airflow to act more evenly on the membrane bubble. Compared with a single air outlet, it can provide more balanced support and stability in the early stage of film formation, which helps the membrane bubble to expand evenly in the circumferential direction, ensuring the uniformity of film thickness and overall stability.
[0044] Specifically, the hollow hole is divided into a coarse hole section 8, a medium hole section 9, and a fine hole section 10 from top to bottom. Transition tapered holes 11 are provided between the coarse hole section and the medium hole section, as well as between the medium hole section and the fine hole section.
[0045] In this embodiment, the coarse, medium, and fine sections of the hollow hole, along with the transition conical hole, optimize the movement space and airflow channel of the inner shaft within the centering shaft. The transition conical hole guides the inner shaft to fall smoothly, preventing jamming and ensuring that the plug accurately blocks the air outlet.
[0046] Specifically, the diameter of the coarse pore section is larger than that of the medium pore section, and the diameter of the medium pore section is larger than that of the fine pore section.
[0047] In this embodiment, the diameter of the coarse orifice is larger than that of the medium orifice, and the diameter of the medium orifice is larger than that of the fine orifice. This orifice design not only works in conjunction with the movement of the inner shaft, but also enables the gradual buffering and regulation of airflow.
[0048] Specifically, the top of the plug is chamfered at 12.
[0049] In this embodiment, the chamfer on the top of the plug makes it easier to align the plug when it falls to block the air outlet, reducing the collision resistance between the plug and the air outlet, improving the smoothness and accuracy of the plug's action in blocking the air outlet, and ensuring that the air outlet can be closed in a timely and effective manner in the later stage of blown film production.
[0050] Specifically, the fastener is a pin, screw, or shaft.
[0051] In this embodiment, the fastener can be a pin, screw, or pin shaft, with a matching pin hole or screw hole provided at the end of the centering shaft and the inner shaft to facilitate the assembly and disassembly of both.
[0052] Specifically, it also includes a stabilizing sleeve 13 fitted outside the centering shaft, which has a frustum structure that is larger at the top and smaller at the bottom.
[0053] In this embodiment, the frustum-shaped stabilizing jacket, which is larger at the top and smaller at the bottom, fitted outside the centering shaft, provides additional guidance and stability for the membrane bubble. During the film's ascent, the frustum-shaped structure of the stabilizing jacket guides the membrane bubble to expand uniformly, reducing its swaying and displacement, and further improving the film's forming quality and stability.
[0054] Specifically, the stabilizing outer sleeve and the centering shaft are fixed together by screws 14.
[0055] In this embodiment, the stabilizing sleeve and the centering shaft are fixed together by screws, ensuring the firmness of the connection between the stabilizing sleeve and the centering shaft.
[0056] Specifically, an air gap of 15 is left between the inner shaft and the coarse hole section.
[0057] In this embodiment, the air gap between the inner shaft and the coarse hole section allows airflow to either pass through the gap or the air hole of the inner shaft during the initial stage of film formation.
[0058] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.
Claims
1. A stabilizing rod, characterized in that... include: A centering shaft, wherein the centering shaft has a hollow hole inside, and an air outlet is provided at the bottom of the centering shaft that communicates with the hollow hole; The inner shaft is fitted into the hollow hole of the centering shaft, and a vent hole is provided inside the inner shaft. Fasteners for connecting the inner shaft and the centering shaft; When the inner shaft and the centering shaft are fixedly connected by fasteners, the plug of the inner shaft separates from the vent hole, allowing the vent hole to communicate with the hollow hole. When the inner shaft separates from the centering shaft and the inner shaft falls, the plug of the inner shaft can block the vent hole, causing the vent hole to close with the hollow hole.
2. The stabilizing bar according to claim 1, characterized in that: The bottom of the centering shaft has an external thread section for connection.
3. The stabilizing bar according to claim 1, characterized in that: There are multiple air vents, which are evenly spaced along the outer periphery of the centering shaft.
4. The stabilizing bar according to claim 1, characterized in that: The hollow hole is divided into a coarse hole section, a medium hole section and a fine hole section from top to bottom. Transition tapered holes are provided between the coarse hole section and the medium hole section, as well as between the medium hole section and the fine hole section.
5. The stabilizing bar according to claim 4, characterized in that: The diameter of the coarse pore section is larger than that of the medium pore section, and the diameter of the medium pore section is larger than that of the fine pore section.
6. The stabilizing bar according to claim 1, characterized in that: The top of the plug is chamfered.
7. The stabilizing bar according to claim 1, characterized in that: The fastener is a pin, screw, or shaft.
8. The stabilizing bar according to claim 1, characterized in that: It also includes a stabilizing sleeve fitted outside the centering shaft, which is a frustum structure that is larger at the top and smaller at the bottom.
9. The stabilizing bar according to claim 8, characterized in that: The stabilizing outer sleeve and the centering shaft are fixed together by screws.
10. The stabilizing bar according to claim 5, characterized in that: An air passage gap is left between the inner shaft and the coarse hole section.