Film blowing machine and bubble stabilizing frame thereof

Abstract

The utility model discloses a film blowing machine and a bubble stabilizing frame thereof. The bubble stabilizing frame comprises a supporting frame and a bubble stabilizing assembly. The supporting frame comprises an annular fixing platform and supporting legs. The foam stabilizing assembly comprises a plurality of pairs of mounting rods, a plurality of connecting adjusting shafts and foam stabilizing semicircular rings; wherein the same pair of mounting rods are connected at the same height, the connecting adjusting shafts on each pair of mounting rods are arranged in a mutually pointing manner, one end of each connecting adjusting shaft is connected with the midpoint of the corresponding bubble stabilizing semicircular ring, and the connecting adjusting shafts can penetrate through the corresponding mounting rods in a front-back moving manner; each pair of bubble stabilizing semi-circular rings can move along with the connecting adjusting shaft to be close to each other and spliced to form a complete circular ring structure, the diameters of different pairs of bubble stabilizing semi-circular rings are different, and the bubble stabilizing semi-circular rings with the corresponding sizes can be selected according to the diameters of film bubbles generated by the film blowing machine to stabilize the film bubbles; and the bubble stabilizing semicircular ring can be well attached to the arc-shaped edge of the film bubble, so that the center position of the film bubble is kept stable, deformation caused by external disturbance is not likely to happen, and the quality of a thin film finished product is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of blown film technology, and in particular to blown film machine and its bubble stabilizer. Background Technology

[0002] A blown film machine is a device that heats and melts plastic granules and then blows them into a thin film. During the plastic granule processing, the plastic granules are fed into the screw extruder below using a feed hopper. The screw extruder melts the plastic granules, filters them from the die head, and then extrudes them through a heated die head. After being cooled by an air ring, the film is blown into a bubble and then passes through a bubble stabilizer, herringbone plate, traction roller, and winding device in sequence. Finally, a roll of plastic film is obtained at the winding device.

[0003] The vertical upward stroke of the extruded film bubble to the herringbone plate and traction rollers requires a considerable distance to cool and shape it. During this stroke, the center position of the film bubble needs to be controlled to prevent shifting or wobbling, ensuring smooth operation. The freshly extruded film bubble is at a high temperature and has strong plasticity; any disturbance in the horizontal direction, such as wind, will cause stretching deformation, resulting in uneven thickness and affecting the quality of the film product. Therefore, a bubble stabilizer is needed in this stroke to prevent abnormal disturbances from affecting film quality.

[0004] In some existing bubble stabilizing frames, the membrane bubble is primarily passed through an annular stabilizer, with the edge of the bubble contacting the stabilizer. The bubble is confined within the range of the annular stabilizer, fixing its center position at the center of the stabilizer. However, the annular stabilizer cannot accommodate membrane bubbles of different diameters. When the bubble diameter is smaller than the annular stabilizer diameter, the bubble edge cannot stably adhere to the stabilizer, resulting in issues such as center position oscillation and bubble deformation. Conversely, when the bubble diameter before passing through the annular stabilizer is larger than the stabilizer diameter, it is difficult to enter the stabilizer and deformation also occurs. Some existing bubble stabilizing frames consist of multiple stabilizing rollers mounted on the same horizontal plane, each tangential to the bubble and surrounding it centrally. However, the stabilizing rollers are straight and unsuitable for the curved edges of the bubble, failing to adhere well to the bubble edge, and the bubble is still prone to deformation.

[0005] Therefore, it is necessary to propose corresponding improvement solutions to address the problem that the existing blown film machine's bubble stabilizer cannot adapt to film bubbles of different diameters and fit them well together. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a blown film machine and its bubble stabilizer to solve the above problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This utility model provides a bubble stabilizing frame for a blown film machine, comprising a support frame and a bubble stabilizing assembly. The support frame includes an annular fixed platform and support feet connected to the edge of the annular fixed platform. The inner side of the annular fixed platform has a bubble channel for the film bubbles generated by the blown film machine to pass through. The bubble stabilizing assembly includes multiple pairs of mounting rods, multiple connecting adjustment shafts corresponding to each of the mounting rods, and multiple bubble stabilizing semicircular rings corresponding to each of the connecting adjustment shafts. The mounting rods of the same pair are connected at the same height on the annular fixed platform, so that the connecting adjustment shafts on the same pair of mounting rods are located on the same horizontal plane. The connecting adjustment shafts on each pair of mounting rods point towards each other. One end of each connecting adjustment shaft is connected to the midpoint of the corresponding bubble stabilizing semicircular ring. The connecting adjustment shaft can move back and forth through the corresponding mounting rod, so that the bubble stabilizing semicircular rings on each pair of connecting adjustment shafts can move closer to each other and merge to form a complete circular structure. The diameters of the bubble stabilizing semicircular rings on different pairs of connecting adjustment shafts are different.

[0009] Preferably, the mounting rod passes through the upper and lower end faces of the annular fixed platform and can be raised and lowered relative to the annular fixed platform.

[0010] Preferably, multiple mounting rods are arranged at intervals along the circumference of the annular fixing platform, and the center of each pair of bubble-stabilizing semicircular rings after assembly is located on the central axis of the membrane bubble channel opening of the annular fixing platform.

[0011] Preferably, the top and bottom ends of the mounting rod are provided with connecting holes for inserting and connecting the adjusting shaft.

[0012] Preferably, the connecting adjustment shaft is a screw, and a rotating handle is fixed on the other end of the connecting adjustment shaft away from the bubble-stabilizing semicircular ring.

[0013] Preferably, the outer periphery of the bubble-stabilizing semicircular ring is fitted with a sleeve, which can roll relative to the outer periphery of the bubble-stabilizing semicircular ring it covers.

[0014] This utility model also provides a blown film machine, characterized in that it includes an air ring and a bubble stabilizing frame as described above, wherein the annular fixing platform of the bubble stabilizing frame is mounted above the air ring for allowing the film bubbles generated from the air ring to pass through the film bubble channel opening of the annular fixing platform.

[0015] The main technical effects achieved by this utility model are as follows:

[0016] The bubble stabilizing frame of the blown film machine described above can be assembled into complete circular ring structures of different diameters using different pairs of bubble stabilizing semicircular rings to accommodate film bubbles of different diameters. The size of the bubble stabilizing semicircular ring can be selected to stabilize the film bubble based on the diameter of the film bubble generated by the blown film machine. Moreover, unlike the existing technology where the stabilizing roller is tangent to the film bubble and surrounds the film bubble in the center, the bubble stabilizing semicircular rings can be assembled into a circular ring structure that adapts to the circular cross-section of the film bubble. The bubble stabilizing semicircular rings can fit well with the arc edge of the film bubble, so that the center position of the film bubble remains stable on the central axis of the circular structure. It is not easily affected by external disturbances and does not undergo tensile deformation, thus avoiding the film bubble thickness uniformity being affected, thereby effectively ensuring the quality of the finished film. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the bubble stabilizing frame of the blown film machine provided by this utility model;

[0018] Figure 2 This is a schematic diagram showing the state of a pair of bubble-stabilizing semi-circular rings in the bubble stabilizer when they are disassembled.

[0019] Figure 3 For the corresponding Figure 2 A magnified view of the circular dashed box area A in the image.

[0020] The reference numerals in the above figures are as follows:

[0021] Support frame 1;

[0022] 10 membrane bubble channel opening, 11 annular fixing platform, and 12 support feet;

[0023] Bubble stabilizing component 2;

[0024] Mounting rod 21, connecting adjustment shaft 22, bubble stabilizing semi-circular ring 23, sleeve 231, rotating handle 24;

[0025] Wind ring 300. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the drawings. The embodiments of this utility model shown in and described with reference to the drawings are merely exemplary, and this utility model is not limited to these embodiments.

[0027] To avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not of great importance are omitted.

[0028] Combination Figure 1 and Figure 2As shown in the figure, this utility model embodiment provides a bubble stabilizing frame for a blown film machine, which includes a support frame 1 and a bubble stabilizing component 2.

[0029] The support frame 1 includes an annular fixed platform 11 and support feet 12 connected to the edge of the annular fixed platform 11. The inner side of the annular fixed platform 11 is provided with a membrane bubble channel 10 for the membrane bubble generated by the blown film machine to pass through.

[0030] The foam stabilizing component 2 includes multiple pairs of mounting rods 21, multiple connecting adjustment shafts 22 connected one-to-one with each of the mounting rods 21, and multiple foam stabilizing semi-circular rings 23 connected one-to-one with each of the connecting adjustment shafts 22.

[0031] In this configuration, the same pair of mounting rods 21 are connected at the same height on the annular fixed platform 11, so that the connecting adjustment shafts 22 on the same pair of mounting rods 21 are located on the same horizontal plane. The connecting adjustment shafts 22 on each pair of mounting rods 21 are arranged pointing towards each other, that is, each pair of connecting adjustment shafts 22 are located on the same straight line. One end of the connecting adjustment shaft 22 is connected to the midpoint of the corresponding bubble-stabilizing semicircular ring 23, which is the end of the connecting adjustment shaft 22 facing the membrane bubble channel opening 10. The connecting adjustment shaft 22 can move back and forth through the corresponding mounting rod 21, so that the bubble-stabilizing semicircular rings 23 on each pair of connecting adjustment shafts 22 can move closer to each other and merge together to form a complete circular structure. The diameters of the bubble-stabilizing semicircular rings 23 on different pairs of connecting adjustment shafts 22 are different.

[0032] The working process of the bubble stabilizing frame of the blown film machine is as follows: Based on the required diameter of the bubble, select the corresponding bubble stabilizing semi-circular ring 23. Locate the connecting adjustment shaft 22 corresponding to the required pair of bubble stabilizing semi-circular rings 23. Adjust the corresponding connecting adjustment shaft 22 to bring the pair of bubble stabilizing semi-circular rings 23 closer together and finally assemble them into a complete circular structure. Then, determine other bubble stabilizing semi-circular rings 23 with a diameter smaller than the required bubble stabilizing semi-circular ring 23. Adjust the connecting adjustment shaft 22 of these other bubble stabilizing semi-circular rings 23 away from the central axis of the bubble channel 10 until the other bubble stabilizing semi-circular rings 23 no longer obstruct the bubble passing through the required bubble stabilizing semi-circular ring 23. That is, the planar projection of the other bubble stabilizing semi-circular rings 23 needs to be moved outside the projection of the circular structure formed by the required bubble stabilizing semi-circular rings 23. At this point, the bubble can smoothly pass through the circular structure formed by the bubble stabilizing semi-circular rings 23 of the required diameter and continue upwards to the herringbone plate and traction roller of the blown film machine in a stable and non-offset state.

[0033] The bubble stabilizing frame of the blown film machine provided in this embodiment can be assembled into complete ring structures with different diameters by correspondingly assembling different pairs of bubble stabilizing semicircular rings 23. Thus, according to the diameter of the film bubble generated by the blown film machine, a matching size of bubble stabilizing semicircular ring 23 can be selected to adaptively stabilize the film bubble. The bubble stabilizing semicircular ring 23 can fit well with the arc edge of the film bubble, so that the center position of the film bubble remains stable and is not easily stretched or deformed by external disturbances, thus avoiding the film bubble thickness uniformity being affected, thereby ensuring the quality of the finished film.

[0034] The size and number of the bubble-stabilizing semicircular rings 23 shown in the figure are merely exemplary. The number of bubble-stabilizing semicircular rings 23 can be set according to the number of different types of membrane bubble radius parameters required during production. Multiple pairs of bubble-stabilizing semicircular rings 23 with the same radius can also be set simultaneously. Therefore, in this embodiment, the mounting rod 21 passes through the upper and lower end faces of the annular fixed platform 11 and can move up and down relative to the annular fixed platform 11. By adjusting the height of each mounting rod 21 on the annular fixed platform 11, different pairs of bubble-stabilizing semicircular rings 23 can be set at different height levels. This avoids structural obstruction between different pairs of bubble-stabilizing semicircular rings 23 at the same height. Pairs of bubble-stabilizing semicircular rings 23 with the same radius can be set at different height levels to provide multiple stabilizing aids for the membrane bubble. This facilitates the classification and clarification of different pairs of bubble-stabilizing semicircular rings 23, quickly completing the preparation for the blown film operation.

[0035] Specifically, multiple mounting rods 21 are arranged at intervals along the circumference of the annular fixed platform 11. The center of the annular structure formed by the splicing of each pair of bubble-stabilizing semicircular rings 23 is located on the central axis of the membrane bubble channel opening 10 of the annular fixed platform 11. That is, the annular structure formed by the splicing of each pair of bubble-stabilizing semicircular rings 23 is a concentric circle, so as to ensure that no matter which pair of bubble-stabilizing semicircular rings 23 is used, the center position of the membrane bubble can be concentrated at the central axis of the membrane bubble channel opening 10.

[0036] Furthermore, the top and bottom ends of the mounting rod 21 are provided with connecting holes for inserting the connecting adjustment shaft 22. Thus, the connecting adjustment shaft 22 can be installed in the space at the upper end face of the annular fixed platform 11 or in the space at the lower end face of the annular fixed platform 11, thereby increasing the usable space of the structure.

[0037] In this example, to facilitate the adjustment of the forward and backward movement of the connecting adjustment shaft 22 within the connecting hole of the mounting rod 21, the connecting adjustment shaft 22 is a screw. A rotating handle 24 is fixed on the other end of the connecting adjustment shaft 22 away from the bubble-stabilizing semicircular ring 23. The operator only needs to turn the rotating handle 24 to control the movement of the connecting adjustment shaft 22.

[0038] like Figure 3As shown, a sleeve 231 is fitted around the outer periphery of the bubble-stabilizing semicircular ring 23, and the sleeve 231 can roll relative to the outer periphery of the bubble-stabilizing semicircular ring 23 it covers. Therefore, the bubble-stabilizing semicircular ring 23 fits against the arc-shaped edge of the membrane bubble through the sleeve 231 on its outer periphery. As the membrane bubble moves upward, it rolls and contacts the sleeve 231, resulting in low friction. This helps to avoid wear on the surface of the membrane bubble and ensures the quality of film formation.

[0039] This utility model embodiment also provides a blown film machine, which includes an air ring 300 and a bubble stabilizing frame as described above. The annular fixing platform 11 of the bubble stabilizing frame is mounted above the air ring 300 and is used to allow the film bubble generated from the air ring 300 to pass through the film bubble channel 10 of the annular fixing platform 11. The annular structure composed of the bubble stabilizing semi-circular ring limits the position of the film bubble.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A bubble stabilizer for a blown film machine, characterized in that, include: The support frame (1) includes an annular fixed platform (11) and support feet (12) connected to the edge of the annular fixed platform (11). The inner side of the annular fixed platform (11) is provided with a membrane bubble channel (10) for the membrane bubble generated by the blown film machine to pass through. The foam stabilizing component (2) includes multiple pairs of mounting rods (21), multiple connecting adjustment shafts (22) connected one-to-one with each of the mounting rods (21), and multiple foam stabilizing semicircular rings (23) connected one-to-one with each of the connecting adjustment shafts (22); Among them, the same pair of mounting rods (21) are connected at the same height on the annular fixed platform (11), so that the connecting adjustment shafts (22) on the same pair of mounting rods (21) are located on the same horizontal plane. The connecting adjustment shafts (22) on each pair of mounting rods (21) are set to point towards each other. One end of the connecting adjustment shaft (22) is connected to the midpoint of the corresponding bubble-stabilizing semicircular ring (23). The connecting adjustment shaft (22) can move back and forth through the corresponding mounting rod (21), so that the bubble-stabilizing semicircular rings (23) on each pair of connecting adjustment shafts (22) can move closer to each other and splice together to form a complete circular structure. The diameters of the bubble-stabilizing semicircular rings (23) on different pairs of connecting adjustment shafts (22) are different.

2. The bubble stabilizer of the blown film machine according to claim 1, characterized in that, The mounting rod (21) passes through the upper and lower end faces of the annular fixed platform (11) and can be raised and lowered relative to the annular fixed platform (11).

3. The bubble stabilizer of the blown film machine according to claim 1, characterized in that, Multiple mounting rods (21) are arranged at intervals along the circumference of the annular fixed platform (11), and the center of the annular structure after the pair of bubble-stabilizing semi-circular rings (23) are assembled is located on the central axis of the membrane bubble channel opening (10) of the annular fixed platform (11).

4. The bubble stabilizer of the blown film machine according to claim 1, characterized in that, The top and bottom ends of the mounting rod (21) are provided with connection holes for inserting and connecting the adjusting shaft (22).

5. The bubble stabilizer of the blown film machine according to claim 1, characterized in that, The connecting adjustment shaft (22) is a screw, and a rotating handle (24) is fixed on the other end of the connecting adjustment shaft (22) away from the bubble stabilizing semi-circular ring (23).

6. The bubble stabilizer of the blown film machine according to claim 1, characterized in that, The outer periphery of the bubble-stabilizing semicircular ring (23) is fitted with a sleeve (231), which can roll relative to the outer periphery of the bubble-stabilizing semicircular ring (23) it covers.

7. A blown film machine, characterized in that, Includes an air ring (300) and a bubble stabilizer as described in any one of claims 1 to 6, wherein the annular fixing platform (11) of the bubble stabilizer is mounted above the air ring (300) for allowing the membrane bubbles generated from the air ring (300) to pass through the membrane bubble channel opening (10) of the annular fixing platform (11).

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