An automated ring gauge for a film blowing machine and method of use thereof

Abstract

The application relates to the technical field of film blowing equipment, in particular to an automatic annular thickness gauge for a film blowing machine and a use method thereof, which comprises an annular track fixed on the film blowing machine and close to a film channel, a thickness detection mechanism is arranged on the annular track, the thickness detection mechanism comprises a rotating ring installed on the annular track, a rack is arranged on the outer side wall of the rotating ring, a first gear is engaged with the position close to the rack on the outer side of the annular track, a second gear is engaged with the outer side of the first gear, and a reciprocating rotating gear is arranged at the lower end of the second gear. The thickness detection mechanism is arranged, the thickness of a film bubble is cyclically scanned and detected, the thickness of the extruded film is monitored in real time, the thickness of the film can be controlled in real time, the overall qualified rate of the extruded film of the film blowing machine is improved, and the possibility of reducing the overall qualified rate of the film due to the small thickness detection range and the fixed point is reduced.

Description

Technical Field

[0001] This application relates to the field of blown film equipment technology, specifically to an automated annular thickness gauge for blown film machines and its usage method. Background Technology

[0002] A thickness gauge for blown film machines is a device used to detect the thickness of the film during the blown film process. Blown film machines are commonly used in the production of plastic films, and thickness gauges are used to monitor the thickness distribution of the film in real time to ensure product quality during production.

[0003] Laser thickness measurement involves scanning the surface of a thin film with a laser beam and measuring the intensity changes of the reflected laser beam to estimate the film's thickness. This method allows for real-time, non-contact thickness measurement and is suitable for high-precision measurements.

[0004] X-ray transmission method calculates the thickness of a thin film by measuring the attenuation of X-rays as they pass through it. The thicker the film, the lower the X-ray transmittance. This method is applicable to various materials, especially non-metallic thin films.

[0005] Ultrasonic thickness measurement uses the change in the propagation speed of ultrasonic waves as they pass through a thin film to measure its thickness. The advantage of this method is that it can be used on various thin film materials and is suitable for relatively thick films.

[0006] Regarding the aforementioned technologies, during the production process of blown film machines, the extruded material is an annular cylindrical film bubble. The thickness gauge probe needs to be perpendicular to the surface of the film at all times. Due to the large outer diameter of the film bubble, it is difficult for a fixed-point thickness gauge to detect the thickness of the film bubble at other locations during the blown film process. Consequently, it is difficult to control the thickness of the entire film bubble, which can easily lead to a decline in film quality control and affect the normal use of the film. Summary of the Invention

[0007] To address the aforementioned shortcomings of existing technologies, this application provides an automated annular thickness gauge for a blown film machine, comprising an annular track fixed to the blown film machine and close to the film channel. A thickness detection mechanism is mounted on the annular track, comprising a rotating ring mounted on the annular track. A rack is mounted on the outer side wall of the rotating ring. A first gear meshes with the outer side of the annular track near the rack. A second gear meshes with the outer side of the first gear. A reciprocating gear is located at the lower end of the second gear. An inner half-gear meshes with the outer side of the reciprocating gear. An outer half-gear is also located on the outer side of the reciprocating gear. An outer protective plate is located on the outer side of the annular track near the outer half-gear. Multiple mounting components are mounted on the rotating ring, evenly distributed along the circumference of the rotating ring. A real-time thickness gauge is mounted on each mounting component.

[0008] Furthermore, the distance between two adjacent real-time thickness gauges is less than the length of the rack, the scanning ranges of two adjacent real-time thickness gauges overlap at the edge, and the scanning ranges of multiple real-time thickness gauges form a complete disk.

[0009] Furthermore, the mounting assembly includes a snap-fit ​​part mounted on a rotating ring. The snap-fit ​​part is provided with a clamping plate with a built-in clamping knob. A collar is provided on the snap-fit ​​part near the clamping plate. A first displacement plate is provided on the inner side of the clamping plate. One end of the first displacement plate is inserted into the inner side of the clamping plate, and the other end of the first displacement plate is inserted into the inner side of the collar. A second displacement plate is inserted into the end of the first displacement plate near the collar. A clamping knob is also provided on the upper end of the first displacement plate near the second displacement plate. One end of the second displacement plate is connected to a real-time thickness gauge.

[0010] Furthermore, the second displacement plate is provided with a U-shaped socket at one end connected to the real-time thickness gauge, the real-time thickness gauge is snapped into the socket, and a probe is provided at the end of the real-time thickness gauge away from the socket.

[0011] Furthermore, an electrostatic adsorption plate is provided on the outer wall of the real-time thickness gauge near the probe. The electrostatic adsorption plate is U-shaped, and the probe is fitted into the groove at the center of the electrostatic adsorption plate.

[0012] Furthermore, the locking part includes a central insert block, and an annular groove is provided on the upper end face of the rotating ring near the center. The lower end of the central insert block is inserted into the rectangular groove provided on the upper end of the rotating ring. An outer locking block is provided on one side of the central insert block, and an inner locking block is provided on the other end of the central insert block. The inner locking block and the outer locking block are locked onto the rotating ring.

[0013] Furthermore, the central insert block has a slot that passes through it, the outer snap-fit ​​block has a first fastener at one end near the central insert block, and the inner snap-fit ​​block has a second fastener at one end near the central insert block. The first fastener is inserted into the slot from one side of the central insert block, and the second fastener is inserted into the first fastener from the other side of the central insert block. The first fastener and the second fastener are engaged and connected.

[0014] A method for using an automated annular thickness gauge for a blown film machine, based on the above description, is characterized by comprising the following steps: S1. Installation: Insert the center plug into the groove on the upper surface of the rotating ring, insert the outer and inner snap-fit ​​blocks into the center plug, fix the center plug using the first and second fasteners, then fix the second displacement plate onto the rotating ring, and finally fix the real-time thickness gauge into the socket on the second displacement plate, so that the probe faces the central axis of the rotating ring. S2. Debugging: Based on the radius of the blown film bubble of the blown film machine, adjust the position of the first displacement plate at the clamping plate, then adjust the position of the second displacement plate significantly, then adjust the length of the second displacement plate extending outward from the first displacement plate, then adjust the position of the socket slightly, and then control the position of the real-time thickness gauge so that the probe can successfully detect the thickness of the film bubble. S3. During the film blowing process of the blown film machine, the output shaft of the motor drives the inner ring half gear and the outer ring half gear to rotate, which in turn causes the reciprocating gear to rotate back and forth. Then, the second gear fixedly connected to the reciprocating gear drives the first gear to rotate. The rack meshing with the first gear moves back and forth with the rotation of the first gear, which in turn controls the rotating ring to rotate back and forth, so that the probe of the real-time thickness gauge can scan the film bubble in a cycle. S4. Data analysis: Under the action of the rotating ring, multiple probes scan the membrane bubble in a cyclic manner. Each probe scans the membrane bubble thickness within a sector. The sectors scanned by multiple probes form a complete ring, thus presenting the overall thickness detection status of the membrane bubble on the monitoring screen.

[0015] The technical solution provided in this application has the following advantages compared with the known prior art: 1. This application sets up a thickness detection mechanism, which controls the reciprocating rotation of the gear through the inner and outer half gears, thereby controlling the reciprocating rotation of the rotating ring. This allows the probe of the real-time thickness gauge to always be perpendicular to the outer wall of the film bubble, and to perform cyclic scanning detection of the film bubble thickness. This enables real-time monitoring of the film extrusion thickness, facilitating real-time control of the film thickness, improving the overall pass rate of the extruded film from the blown film machine, and reducing the possibility of a decrease in the overall pass rate of the film due to a small thickness detection range and fixed points. 2. This application, by setting up an installation component, fixes the first displacement plate by clamping knobs on the clamping plate and adjusts the position of the first displacement plate. It also fixes the second displacement plate by clamping knobs on the first displacement plate and adjusts the position of the second displacement plate. By combining the first and second displacement plates, the distance between the probe and the outer wall of the membrane bubble is adjusted, ensuring the effectiveness of the real-time thickness gauge and thus improving the thickness detection effect of the thickness detection mechanism. At the same time, it also improves the applicability of the thickness detection mechanism. 3. This application, by setting a snap-fit ​​part, fixes the outer snap-fit ​​block and the inner snap-fit ​​block on the rotating ring through the central insert block, and uses the first fastener and the second fastener to snap-fit ​​the outer snap-fit ​​block and the inner snap-fit ​​block, which facilitates the operation of the real-time thickness gauge on the rotating ring, makes it easy to adjust the number and position of the real-time thickness gauge, improves the applicability of the thickness detection mechanism, and makes it easy to adjust the number of detection groups of the thickness gauge, thereby improving the accuracy of the thickness gauge. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure in the embodiments of this application; Figure 2 This is a schematic diagram of the thickness detection mechanism in an embodiment of this application; Figure 3 This is a schematic diagram of the rotating ring structure in an embodiment of this application; Figure 4 This is a schematic diagram of the connection of the outer ring half gear in an embodiment of this application; Figure 5 This is a schematic diagram of the snap-fit ​​portion in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the central insert block in an embodiment of this application; Figure 7 This is a schematic diagram of the socket structure in an embodiment of this application; Figure 8 This is a schematic diagram of the electrostatic adsorption plate in the embodiments of this application; Figure 9 for Figure 7 Enlarged view of point A in the middle; Figure 10 This is a schematic diagram showing the connection between the central insert block and the rotating ring in an embodiment of this application.

[0017] In the diagram: 1. Circular track; 2. Thickness detection mechanism; 21. Rotating ring; 22. Rack; 23. First gear; 24. Second gear; 25. Reciprocating gear; 26. Inner ring half gear; 27. Outer ring half gear; 28. Outer protective plate; 3. Mounting assembly; 31. Snap-fit ​​part; 311. Outer snap-fit ​​block; 312. Inner snap-fit ​​block; 313. Center insert block; 314. First fastener; 315. Second fastener; 316. Slot; 32. Clamping plate; 33. Collar; 34. First displacement plate; 35. Second displacement plate; 36. Socket; 4. Real-time thickness gauge; 41. Probe; 42. Electrostatic adsorption plate. Detailed Implementation

[0018] To better understand the above technical solution, the following will refer to the appendix to the instruction manual. Figure 1-10 The specific implementation methods are described in detail below for the above technical solutions.

[0019] refer to Figures 1 to 6 This application discloses an automated annular thickness gauge for a blown film machine, comprising an annular track 1 and a thickness detection mechanism 2. The thickness detection mechanism 2 is mounted on the annular track 1 and is used to detect the thickness of the film bubble inside the blown film machine.

[0020] The thickness detection mechanism 2 includes a rotating ring 21, a rack 22, a first gear 23, a second gear 24, a reciprocating gear 25, an inner half-gear 26, an outer half-gear 27, an outer protective plate 28, a mounting assembly 3, a real-time thickness gauge 4, a probe 41, and an electrostatic adsorption plate 42. The rotating ring 21 is mounted on an annular track 1 and is slidably connected to the annular track 1, allowing it to slide on the track with minimal vibration during sliding. The rack 22 is fixedly mounted on the outer wall of the rotating ring 21 near its edge. The outer protective plate 28 is fixedly mounted on the outer wall of the annular track 1 near the rack 22. The first gear 23 is fixedly mounted inside the outer protective plate 28 near the rack 22, and meshes with the rack 22. The second gear 24 is fixedly mounted inside the outer protective plate 28 near the first gear 23, and meshes with the first gear 23. The lower end of the second gear 24 is provided with a connecting rod. The reciprocating gear 25 is fixedly installed below the second gear 24, and the second gear 24 and the reciprocating gear 25 are fixedly connected by the connecting rod. The second gear 24 and the reciprocating gear 25 rotate synchronously, and the radius of the reciprocating gear 25 is smaller than the radius of the second gear 24. The inner ring half gear 26 is fixedly installed inside the outer protective plate 28 and close to the reciprocating gear 25, and the inner ring half gear 26 is meshed with the reciprocating gear 25. The outer ring half gear 27 is fixedly installed inside the outer protective plate 28 and close to the reciprocating gear 25, and the reciprocating gear 25 is meshed with the outer ring half gear 27. The inner ring half gear 26 and the outer ring half gear 27 are concentric and coaxial. The inner ring half gear 26 is driven by a drive motor. The mounting assembly 3 is installed on the upper end of the rotating ring 21, and multiple mounting assemblies 3 are evenly distributed along the circumference of the rotating ring 21. The real-time thickness gauge 4 is mounted on the mounting assembly 3, and is mounted on the rotating ring 21 via the mounting assembly 3. The probe 41 is fixedly mounted on the real-time thickness gauge 4, and the electrostatic adsorption plate 42 is fixedly mounted on the outer wall of the real-time thickness gauge 4 and close to the probe 41. The electrostatic adsorption plate 42 is designed with a U-shaped structure, and the probe 41 can be fitted into the groove at the center of the electrostatic adsorption plate 42.

[0021] The blown film machine blows the film. After the expanded film bubble stabilizes, the drive motor of the thickness detection mechanism 2 is activated. The output shaft of the drive motor rotates, which drives the inner ring half gear 26 and the outer ring half gear 27 to rotate. When the inner ring half gear 26 rotates to mesh with the reciprocating gear 25, the reciprocating gear 25 rotates in one direction, thereby driving the second gear 24 to rotate. The first gear 23, which meshes with the second gear 24, rotates, thereby driving the rack 22, which meshes with the first gear 23, to displace. The displacement of the rack 22 drives the rotating ring 21 to rotate. The mounting assembly 3 located on the rotating ring 21 rotates along the circumference of the rotating ring 21. The probe 41 located on the real-time thickness gauge 4 scans and detects the film bubble. The detection range of a single probe 41 is a sector, and the detection range of multiple probes 41 is a complete disk. When the inner half-gear 26 disengages from the reciprocating gear 25, the outer half-gear 27 engages with the reciprocating gear 25, causing the reciprocating gear 25 to rotate in the opposite direction. This, in turn, drives the second gear 24 and the first gear 23 to rotate in the opposite direction, using the rotation of the first gear 23 to drive the rack 22 to move in the opposite direction. When the rack 22 moves in the opposite direction, the rotating ring 21 rotates, thereby causing the probe 41 to return to its original position. Thus, the rotating ring 21 can reciprocate on the annular track 1, enabling the probe 41 of the real-time thickness gauge 4 to cyclically scan the membrane bubble. During the continuous extrusion of the membrane bubble, multiple probes 41 can scan the complete membrane bubble, thereby detecting the thickness data of the entire membrane bubble. Dust and other particles generated during the membrane bubble extrusion process are adsorbed by the electrostatic adsorption plate 42 next to the probe 41, reducing the amount of dust on the probe 41 and ensuring the accuracy of the detection data.

[0022] refer to Figures 5 to 10The mounting assembly 3 includes a snap-fit ​​part 31, a clamping plate 32, a collar 33, a first displacement plate 34, a second displacement plate 35, and a socket 36. The snap-fit ​​part 31 is mounted on the rotating ring 21. The snap-fit ​​part 31 includes an outer snap-fit ​​block 311, an inner snap-fit ​​block 312, a central insert block 313, a first fastener 314, and a second fastener 315. An annular groove is formed on the upper end face of the rotating ring 21, and the central insert block 313 is inserted into the groove on the upper end face of the rotating ring 21. A slot 316 is formed through the center of the central insert block 313. The outer snap-fit ​​block 311 is mounted on one side of the central insert block 313, and the first fastener 314 is fixedly mounted on the outer side wall of the outer snap-fit ​​block 311 and close to one end of the central insert block 313. The first fastener 314 is inserted into the slot 316 of the central insert block 313 from one side of the central insert block 313. The outer snap-fit ​​block 311 is engaged with the central insert block 313 via the first fastener 314. The inner snap-fit ​​block 312 is installed on the other side of the central insert block 313. The second fastener 315 is fixedly installed on the outer wall of the inner snap-fit ​​block 312 and close to one end of the central insert block 313. The second fastener 315 is inserted into the slot 316 of the central insert block 313 from the other end of the central insert block 313, and the second fastener 315 is inserted into the inner side of the first fastener 314 and engaged with it. The inner snap-fit ​​block 312 is engaged with the central insert block 313 via the second fastener 315, and the inner snap-fit ​​block 312 is connected to the outer snap-fit ​​block 311 via the first fastener 314 and the second fastener 315. A clamping plate 32 is fixedly installed on the upper surface of the outer clamping block 311 near its center. A clamping knob is provided on the upper surface of the clamping plate 32, and the clamping knob is connected to the clamping plate 32 via a threaded rod. A threaded hole is provided at the upper end of the clamping plate 32 for the threaded rod to pass through. A collar 33 is fixedly installed on the upper end of the inner clamping block 312. One end of a first displacement plate 34 is inserted into the inner side of the clamping plate 32, and the end of the first displacement plate 34 inserted into the clamping plate 32 passes through the clamping plate 32. The first displacement plate 34 can slide freely within the inner side of the clamping plate 32, and the clamping knob on the clamping plate 32 can fix the first displacement plate 34. The other end of the first displacement plate 34 is inserted into the inner side of the collar 33, and the end of the first displacement plate 34 inserted into the collar 33 passes through the collar 33. The first displacement plate 34 can slide freely within the collar 33, and the collar 33 is used to improve the stability of the first displacement plate 34. The second displacement plate 35 is inserted into the end of the first displacement plate 34 near the collar 33, and the second displacement plate 35 is slidably connected to the first displacement plate 34. A threaded hole is provided on the upper surface of the first displacement plate 34 near the second displacement plate 35, and a clamping knob is threaded into the threaded hole. The first displacement plate 34 can fix the second displacement plate 35 using the threaded rod of the clamping knob. A socket 36 is fixedly installed on the end of the second displacement plate 35 away from the first displacement plate 34, and the socket 36 is used to fix the real-time thickness gauge 4.

[0023] Before blowing the film in the blown film machine, the central insert block 313 is first inserted into the groove on the upper surface of the rotating ring 21. Then, one end of the outer snap-fit ​​block 311 with the first fastener 314 is inserted into the slot 316 in the center of the central insert block 313, and the first fastener 314 is inserted into the slot 316 of the central insert block 313. One end of the inner snap-fit ​​block 312 with the second fastener 315 is inserted into the slot 316 of the central insert block 313, and the second fastener 315 is inserted into the slot 316 of the central insert block 313, and the second fastener 315 is inserted into the first fastener 314, and the first fastener 314 and the second fastener 315 are engaged. Through the engagement of the first fastener 314 and the second fastener 315, the outer snap-fit ​​block 311 and the inner snap-fit ​​block 312 are fixed on both sides of the central insert block 313, thereby fixing the snap-fit ​​part 31 to the rotating ring 21. Multiple locking parts 31 are fixedly installed at equal intervals on the rotating ring 21, and the multiple locking parts 31 are evenly distributed along the circumference of the rotating ring 21 to ensure that the probes 41 of the multiple real-time thickness gauges 4 can form a complete, disc-shaped detection range. After the locking parts 31 are installed, the position of the first displacement plate 34 on the clamping plate 32 is adjusted by adjusting the clamping knob at the upper end of the outer locking block 311, thereby significantly controlling the extension amount of the first displacement plate 34. By adjusting the clamping knob at the upper end of the first displacement plate 34, the position of the second clamping plate 32 within the first displacement plate 34 is slightly adjusted, thereby controlling the extension amount of the second displacement plate 35. By adjusting the positions of the first displacement plate 34 and the second displacement plate 35, the positions of the socket 36 and the real-time thickness gauge 4 are adjusted, so that the distance between the probe 41 on the real-time thickness gauge 4 and the outer wall of the membrane bubble is maintained, ensuring the accuracy of the detection data of the probe 41 of the real-time thickness gauge 4.

[0024] A method for using an automated annular thickness gauge for a blown film machine, based on the above, includes the following steps: S1. Installation: Insert the center plug 313 into the groove on the upper surface of the rotating ring 21, insert the outer snap-fit ​​block 311 and the inner snap-fit ​​block 312 into the center plug 313, and use the first fastener 314 and the second fastener 315 to fix the center plug 313. Then fix the second displacement plate 35 onto the rotating ring 21, and then fix the real-time thickness gauge 4 into the socket 36 on the second displacement plate 35, so that the probe 41 faces the central axis of the rotating ring 21. S2. Adjustment: Based on the radius of the blown film bubble of the blown film machine, adjust the position of the first displacement plate 34 at the clamping plate 32, then adjust the position of the second displacement plate 35 by a large margin, then adjust the length of the second displacement plate 35 extending outward from the first displacement plate 34, then adjust the position of the socket 36 by a small margin, and then control the position of the real-time thickness gauge 4 so that the probe 41 can successfully detect the thickness of the film bubble. S3. During the film blowing process of the blown film machine, the output shaft of the motor drives the inner ring half gear 26 and the outer ring half gear 27 to rotate, which in turn causes the reciprocating gear 25 to rotate back and forth. Then, the second gear 24, which is fixedly connected to the reciprocating gear 25, drives the first gear 23 to rotate. The rack 22, which meshes with the first gear 23, moves back and forth following the rotation of the first gear 23, thereby controlling the rotating ring 21 to rotate back and forth, so that the probe 41 of the real-time thickness gauge 4 can scan the film bubble in a cycle. S4. Data analysis: Under the action of the rotating ring 21, multiple probes 41 scan the membrane bubble in a cyclic manner. Each probe 41 scans the membrane bubble thickness within a sector. The sectors scanned by multiple probes 41 form a complete ring, thereby presenting the overall thickness detection status of the membrane bubble on the monitoring screen.

[0025] The working principle of this application embodiment: Before the membrane bubble is extruded, the central insert 313 is inserted into the groove at the upper end of the rotating ring 21, and the outer clamping block 311 and the inner clamping block 312 are inserted into both sides of the central insert 313 to fix the clamping plate 32 and the collar 33. Then, the clamping part 31 is fixedly installed on the rotating ring 21 so that multiple clamping parts 31 are evenly distributed along the circumference of the rotating ring 21. The positions of the first displacement plate 34 and the second displacement plate 35 are adjusted according to the inner diameter of the membrane bubble, and the distance between the probe 41 and the outer wall of the membrane bubble is adjusted. The probe 41 of the real-time thickness gauge 4 is placed in a position that can accurately detect the thickness of the membrane bubble. During the extrusion process of the membrane bubble, the inner half gear 26 and the outer half gear 27 are driven to rotate by the drive gear on the inner half gear 26, which in turn drives the reciprocating gear 25 to rotate. When the inner half gear 26 meshes with the reciprocating gear 25, the reciprocating gear 25 rotates in one direction. When the outer half gear 27 meshes with the reciprocating gear 25, the reciprocating gear 25 rotates in the other direction. This method controls the forward and reverse rotation of the second gear 24 and the first gear 23, which in turn drives the rack 22 to move back and forth, realizing the reciprocating rotation of the rotating ring 21. When the rotating ring 21 reciprocates, the probe 41 of the real-time thickness gauge 4 located at its upper end performs cyclic scanning detection on the extruded membrane bubble.

[0026] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated annular thickness gauge for a blown film machine, characterized in that, The device includes an annular track (1) fixed to the blown film machine and close to the film channel. A thickness detection mechanism (2) is provided on the annular track (1). The thickness detection mechanism (2) includes a rotating ring (21) mounted on the annular track (1). A rack (22) is provided on the outer wall of the rotating ring (21). A first gear (23) meshes with the outer side of the annular track (1) near the rack (22). A second gear (24) meshes with the outer side of the first gear (23). The lower end of the second gear (24) is provided with… There is a reciprocating gear (25), and an inner ring half gear (26) meshes with the outer side of the reciprocating gear (25). An outer ring half gear (27) is also provided on the outer side of the reciprocating gear (25). An outer guard plate (28) is provided on the outer side of the annular track (1) and near the outer ring half gear (27). Multiple mounting components (3) are provided on the rotating ring (21). The multiple mounting components (3) are evenly distributed along the circumference of the rotating ring (21). A real-time thickness gauge (4) is provided on the mounting component (3). The mounting assembly (3) includes a snap-fit ​​part (31) mounted on a rotating ring (21). The snap-fit ​​part (31) is provided with a clamping plate (32) with a clamping knob. A collar (33) is provided on the snap-fit ​​part (31) and near the clamping plate (32). A first displacement plate (34) is provided on the inner side of the clamping plate (32). One end of the first displacement plate (34) is inserted into the inner side of the clamping plate (32), and the other end of the first displacement plate (34) is inserted into the inner side of the collar (33). A second displacement plate (35) is inserted into the end of the first displacement plate (34) near the collar (33). A clamping knob is also provided on the upper end of the first displacement plate (34) and near the second displacement plate (35). One end of the second displacement plate (35) is connected to a real-time thickness gauge (4). The snap-fit ​​part (31) includes a central insert (313). An annular groove is provided on the upper surface of the rotating ring (21) near the center. The lower end of the central insert (313) is inserted into the rectangular groove on the upper end of the rotating ring (21). An outer snap-fit ​​block (311) is provided on one side of the central insert (313), and an inner snap-fit ​​block (312) is provided on the other end of the central insert (313). The inner snap-fit ​​block (312) and the outer snap-fit ​​block (311) are snapped onto the rotating ring (21).

2. The automated annular thickness gauge for a blown film machine according to claim 1, characterized in that, The distance between two adjacent real-time thickness gauges (4) is less than the length of the rack (22), the scanning ranges of two adjacent real-time thickness gauges (4) overlap at the edge, and the scanning ranges of multiple real-time thickness gauges (4) form a complete disk.

3. An automated annular thickness gauge for a blown film machine according to claim 2, characterized in that, The second displacement plate (35) is connected to the real-time thickness gauge (4) at one end with a U-shaped socket (36). The real-time thickness gauge (4) is snapped into the socket (36). The real-time thickness gauge (4) is provided with a probe (41) at the end away from the socket (36).

4. An automated annular thickness gauge for a blown film machine according to claim 3, characterized in that, An electrostatic adsorption plate (42) is provided on the outer wall of the real-time thickness gauge (4) near the probe (41). The electrostatic adsorption plate (42) is U-shaped, and the probe (41) is fitted into the groove at the center of the electrostatic adsorption plate (42).

5. An automated annular thickness gauge for a blown film machine according to claim 4, characterized in that, The central insert (313) has a slot (316) that passes through it. The outer snap-fit ​​block (311) has a first fastener (314) at one end near the central insert (313), and the inner snap-fit ​​block (312) has a second fastener (315) at one end near the central insert (313). The first fastener (314) is inserted into the slot (316) from one side of the central insert (313), and the second fastener (315) is inserted into the first fastener (314) from the other side of the central insert (313). The first fastener (314) and the second fastener (315) are engaged and connected.

6. A method of using an automated annular thickness gauge for a blown film machine according to claim 5, characterized in that, Includes the following steps, S1. Installation: Insert the center plug (313) into the groove on the upper end face of the rotating ring (21), insert the outer snap-fit ​​block (311) and the inner snap-fit ​​block (312) into the center plug (313), fix the center plug (313) with the first fastener (314) and the second fastener (315), then fix the second displacement plate (35) on the rotating ring (21), and then fix the real-time thickness gauge (4) into the socket (36) on the second displacement plate (35), so that the probe (41) faces the central axis of the rotating ring (21); S2. Adjustment: Based on the radius of the blown film bubble of the blown film machine, adjust the position of the first displacement plate (34) at the clamping plate (32), then adjust the position of the second displacement plate (35) by a large margin, then adjust the length of the second displacement plate (35) extending outward from the first displacement plate (34), then adjust the position of the socket (36) by a small margin, and then control the position of the real-time thickness gauge (4) so ​​that the probe (41) can successfully detect the thickness of the film bubble; S3. During the blowing of the film by the blown film machine, the output shaft of the motor drives the inner ring half gear (26) and the outer ring half gear (27) to rotate, which in turn causes the reciprocating gear (25) to rotate back and forth. Then, the second gear (24) fixedly connected to the reciprocating gear (25) drives the first gear (23) to rotate. The rack (22) meshing with the first gear (23) moves back and forth following the rotation of the first gear (23), which in turn controls the rotating ring (21) to rotate back and forth, so that the probe (41) of the real-time thickness gauge (4) scans the film bubble in a cycle. S4. Data analysis: Under the action of the rotating ring (21), multiple probes (41) scan the membrane bubble in a cyclic manner. Each probe (41) scans the membrane bubble thickness within a sector. The sectors scanned by multiple probes (41) form a complete ring, thereby presenting the overall thickness detection status of the membrane bubble on the monitoring screen.

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