A film blowing machine thickness on-line detection device and a detection method thereof

Abstract

The application discloses a kind of film blowing machine thickness on-line detection device and its detection method, it is related to film detection technical field, including the guide rail being opened with film through hole, the support seat of connection detection instrument and adjusting assembly;Adjusting assembly contains two adjusting parts based on the symmetry of support seat, adjusting part includes the guide seat sliding in guide rail sliding slot, two guide seats are all hinged support arm and support arm other end is hinged support seat;By drive mechanism 1, double drive: two guide seats are all equipped with the driver A of gear and the meshing of guide rail gear slot;2, single drive+locking: one guide seat is equipped with driver A, the other is equipped with the locking assembly of gear tooth, drive guide seat relative movement, change support arm included angle to adjust the circumferential motion track of detection instrument;With adjusting rod, meshed linkage tooth A / B and limiting plate stable structure.A beneficial effect: trajectory adjustment and circumferential detection are realized using original driving source, reduce cost, improve synergy, adapt to different size film and ensure detection accuracy, reduce maintenance process.

Description

Technical Field

[0001] This invention relates to the field of thin film testing technology, and more specifically, to an online thickness detection device and method for blown film machines. Background Technology

[0002] With the rapid development of the film manufacturing industry, cylindrical films formed by blow molding need to undergo comprehensive quality inspection before leaving the factory to ensure that there are no defects such as damage or uneven thickness. Existing film inspection devices typically construct the inspection structure using guide rails and support bases. The guide rails have through holes for the film to pass through. After the inspection instrument is installed on the support base, it is driven by a drive mechanism to move in a circular motion along the guide rail, thereby achieving omnidirectional inspection of the cylindrical film. The inspection instrument must be in close contact with the film surface to ensure inspection accuracy, therefore it needs to be compatible with films of different diameters. In existing technologies, to adapt the detector to films of different sizes, an additional drive source is commonly used to adjust the detector's position on the guide rail through-hole, thereby changing its circular motion trajectory. This method not only increases the hardware procurement and subsequent maintenance costs of the equipment, but also easily leads to coordination errors because multiple drive sources (such as a circular drive source and a position adjustment drive source) need to work synchronously. For example, deviations in the start-stop timing of the drive sources or speed mismatches can cause the detector to fail to stably adhere to the film, affecting both detection efficiency and overall equipment stability. In addition, the operation process of multiple drive sources is complex, requiring operators to be proficient in the control logic and adjustment parameters of each drive source. If the operation is improper (such as deviation in adjustment range or incorrect start-up sequence of drive sources), it is very easy to cause the position of the detector to shift, thereby generating detection errors.

[0003] Therefore, in order to solve the above-mentioned technical problems, the present invention proposes an online thickness detection device and detection method for blown film machines. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide an online thickness detection device and method for blown film machines.

[0005] To achieve the above objectives, in a first aspect, the present invention provides the following technical solution: an online thickness detection device for a blown film machine, comprising a guide rail and a support base, wherein a through hole is provided in the guide rail for the film to pass through; the guide rail is connected to the support base via an adjustment component, a detector is mounted on the support base, and a drive mechanism is mounted on the adjustment component, the drive mechanism being able to drive the adjustment component to rotate circumferentially based on the guide rail, and the support base driving the detector to perform circumferential motion based on the through hole; The adjustment assembly includes two adjustment parts, which are symmetrically arranged based on the support base. Each adjustment part includes a guide seat that is slidably disposed on the guide rail. A support arm is rotatably disposed on the guide seat. One end of the support arm is rotatably disposed on the support base, and an adjustment rod is rotatably disposed on the support arm. The other end of the adjustment rod is rotatably disposed on the support base. The drive mechanism drives the two guide seats to move relative to each other, causing the two support arms to rotate relative to each other, thereby adjusting the trajectory of the detector's circular motion.

[0006] Furthermore, one of the support arms is provided with a linkage tooth A, and the other support arm is provided with a linkage tooth B. The linkage tooth A and the linkage tooth B mesh, and the two support arms shift synchronously.

[0007] Furthermore, a limit plate is provided on the guide rail, and a limit groove is provided on the limit plate for the support seat to slide.

[0008] Furthermore, the driving mechanism includes a driver A disposed on the guide seat, and a driver A is disposed on both guide seats. The driving end of the driver A is provided with a gear, and the guide rail is provided with a tooth groove that meshes with the gear. The driver A drives the gear to rotate, thereby causing the guide seat to move in a circular motion based on the guide rail.

[0009] Furthermore, the driving mechanism includes a driver A disposed on one of the guide seats, the driving end of the driver A is provided with a gear, and the guide rail is provided with a toothed groove that meshes with the gear. The driver A drives the gear to rotate, thereby causing the guide seat to move in a circular motion based on the guide rail. The other guide seat is provided with a locking component, which fixes the guide seat on the guide rail.

[0010] Furthermore, the locking assembly includes a driver B disposed on another of the guide seats, the driving end of the driver B being connected to a locking tooth, the locking tooth being nested with the tooth groove.

[0011] Secondly, the following technical solution is provided, including the following steps: The controller drives the two drivers A to move synchronously in opposite directions, causing the two guide seats to move closer to or further away from each other. The relative movement of the two guide seats drives the two support arms to deflect synchronously, adjusting the position of the detector in the through hole to adapt to the size of the film produced this time; The controller drives the two actuators A to move synchronously in the same direction, causing the guide seat to drive the detector to move in a circular motion through the support arm to detect the film thickness.

[0012] Thirdly, the following technical solution is provided, including the following steps: The controller causes the driver B to operate, causing the locking teeth to engage in the tooth groove, and fixing the guide seat with the locking teeth on the guide rail; The controller drives the driver A to operate, causing the guide seat on which the driver A is mounted to move in a circular motion based on the guide rail, causing the two support arms to deflect synchronously, adjusting the position of the detector in the through hole to adapt to the size of the film produced this time; The controller causes the driver B to operate, causing the locking teeth to disengage from the tooth slots; The controller drives the driver A to operate, causing the guide seat on which the driver A is mounted to move in a circular motion based on the guide rail, and driving the detector to move in a circular motion through the support arm to detect the film thickness.

[0013] Compared with the prior art, the present invention has the following beneficial effects: By optimizing the coordination between the adjustment components and the drive mechanism, the drive source (such as driver A), which was originally only used to drive the circular motion of the detector, also has the function of trajectory adjustment. There is no need to set up an additional position adjustment drive source, which greatly reduces the overall manufacturing cost and subsequent maintenance cost of the equipment. At the same time, trajectory adjustment and circular detection can be completed by a single drive group (single drive + lock) or two sets of coordinated drives (dual drive), avoiding the coordination problem between multiple drive sources, significantly improving the coordination and stability of equipment operation. Moreover, the operation only requires adjusting the drive direction and speed through the controller, simplifying the operation process and reducing the dependence on the operator's skill level. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the structure in this invention; Figure 3 This is a schematic diagram of the support arm installation structure in this invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the guide seat in this invention; Figure 5 This is a schematic diagram of the limiting plate installation structure in this invention; Figure 6 This is a schematic diagram of the limiting groove connection structure in this invention.

[0015] 1. Guide rail; 2. Support arm; 3. Guide seat; 4. Driver B; 5. Through hole; 6. Support seat; 7. Detector; 8. Slide groove; 9. Driver A; 10. Gear groove; 11. Adjusting rod; 12. Linkage gear A; 13. Linkage gear B; 14. Gear; 15. Clamping gear; 16. Limiting plate; 17. Limiting groove. Detailed Implementation

[0016] 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 a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0017] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0018] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0019] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0021] like Figures 1-6 As shown, the present invention provides an online thickness detection device and method for blown film machines, such as... Figure 1 , Figure 2 As shown, the device includes a guide rail 1 and a support base 6. The guide rail 1 has a through hole 5 for the thin film to pass through. The thin film, after being blown, is cylindrical and passes through the through hole 5. An adjustment assembly is installed on the guide rail 1, and the support base 6 is connected to the adjustment assembly. A detector 7 is bolted to the support base 6. The drive mechanism can drive the detector 7 to perform circular motion on the guide rail 1 via the adjustment assembly, thereby performing comprehensive inspection of the cylindrical thin film. To accommodate thin films of different sizes, the circular motion trajectory of the detector 7 needs to be adjusted so that it can closely adhere to the surface of the thin film.

[0022] Currently, the position of the detector 7 on the through hole 5 is usually adjusted by an additional drive source to meet different detection needs. This requires setting up an additional drive source, which not only increases the overall cost, but also results in poor coordination between multiple drive sources and tests the operator's skill level.

[0023] The adjustment assembly includes two adjustment parts symmetrically arranged based on the support base 6. Each adjustment part includes a guide seat 3 slidably mounted on a guide rail 1. A groove 8 is provided on the guide rail 1. Multiple rollers (not shown in the figure) can be arranged between the guide seat 3 and the groove 8 of the guide rail 1 to reduce friction during sliding between the guide seat 3 and the guide rail 1. Support arms 2 are rotatably mounted on both guide seats 3, and the support arms 2 are hinged to the support base 6. Figure 2 As shown, the two support arms 2 form an angle between them. If the two guide seats 3 are driven to move closer to each other, the two support arms 2 will rotate based on the guide seats 3, making the angle between the two support arms 2 smaller. The support arms 2 as a whole will move outward, thereby driving the detector 7 away from the center position of the through hole 5. This can expand the circumferential motion trajectory of the detector 7, which can accommodate large-sized films.

[0024] Similarly, if it is necessary to inspect a small-sized film, the two guide seats 3 are driven away from each other by the drive mechanism, and the two support arms 2 rotate based on the guide seats 3, so that the included angle between the two support arms 2 increases, and the support arms 2 move towards the guide rail 1 as a whole, thereby driving the detector 7 to move towards the center of the through hole 5, so that the detector 7 is closer to the film and the circular motion trajectory of the detector 7 is reduced.

[0025] Based on the above, the drive source, which was originally only used to drive the detector 7 to perform circular motion, can also adjust the motion trajectory of the detector 7 according to different production needs, thereby enabling the detection of films of different sizes. There is no need to set up drive sources in other directions, and the overall coordination is improved.

[0026] To prevent the support base 6 from deflecting when the support arm 2 rotates, an adjusting rod 11 is provided between each support arm 2 and the support base 6. The two ends of the adjusting rod 11 are respectively hinged to the support arm 2 and the support base 6, so that the support base 6 can be stabilized when the support arm 2 rotates.

[0027] To achieve relative movement between the two guide seats 3, one approach is to install driving mechanisms on each guide seat 3. These mechanisms include a driver A9 mounted on the guide seat 3, with a gear 14 at its driving end. A toothed groove 10 meshes with the gear 14 on the guide rail 1. The driver A9 drives the gear 14 to rotate, and the gear 14 meshes with the toothed groove 10. Under the reaction force of the toothed groove 10, the gear 14 moves in a circular motion along the groove 10. A controller can drive the two drivers A9 to move in the same or opposite directions, and the two drivers A9 can move at the same speed. When adjusting the position of the detector 7, if the size of the film to be detected is smaller than a preset standard size, the detector 7 needs to be moved closer to the center of the through hole 5 to reduce the circular motion trajectory of the detector 7, thus achieving the detection purpose. At this time, if... Figure 2 As shown, to increase the angle between the two support arms 2, the two guide seats 3 need to be moved away from each other. The controller drives the driver A9 on one guide seat 3 to rotate clockwise and the driver A9 on the other guide seat 3 to rotate counterclockwise, thereby moving the detector 7 closer to the center of the through hole 5. Then, the controller drives the two drivers A9 to rotate in the same direction and synchronously, thus completing the circular motion of the detector 7 and completing the detection.

[0028] Similarly, if the size of the film to be inspected is smaller than the preset standard size, the detector 7 needs to be moved away from the center of the through hole 5 to expand the circular motion trajectory of the detector 7. At this time, if... Figure 2 As shown, to reduce the angle of the two support arms 2, the two guide seats 3 need to be brought closer together. The controller drives the driver A9 on one guide seat 3 to rotate counterclockwise and the driver A9 on the other guide seat 3 to rotate clockwise, thereby moving the detector 7 away from the center of the through hole 5. Then, the controller drives the two drivers A9 to rotate in the same direction and synchronously, thus completing the circular motion of the detector 7 and completing the detection.

[0029] To achieve relative movement of the guide seats 3, secondly, unlike the above method which involves setting drive mechanisms on both guide seats 3, only one guide seat 3 needs a drive mechanism. The structure of the drive mechanism is the same as described above, and the driving principle is the same, so it will not be repeated here. A locking component is set on the other guide seat 3 to fix the guide seat 3 to the guide rail 1. The locking component includes a driver B4 set on the guide seat 3. The drive end of the driver B4 is connected to a locking tooth 15, which is nested with a tooth groove 10. The driver B4 can drive the locking tooth 15 to engage in the tooth groove 10, thereby fixing the locking tooth 15 to the guide rail 1, preventing the guide seat 3 from sliding on the guide rail 1. If it is necessary to adjust the position of the detector 7, simply activate the drive mechanism through the controller to move the guide seat 3. Since the other guide seat 3 is fixed by the locking component, relative movement of the two guide seats 3 can be achieved. Only the direction of movement of the drive mechanism needs to be controlled to adjust the angle of the support arm 2, thereby adjusting the position of the detector 7. The specific principle is the same as above, so it will not be repeated here. After adjustment, the controller drives the driver B4 to make the locking tooth 15 leave the tooth groove 10. At this time, the locking component no longer fixes the guide seat 3 on the guide rail 1. The controller controls the driver A9 to drive the detector 7 to perform circular motion to achieve the detection purpose.

[0030] Driver A9 can be a stepper motor, servo motor, etc., and driver B4 can be a solenoid valve driver, pneumatic or hydraulic driver, etc.

[0031] Furthermore, based on the two embodiments described above, one of the support arms 2 is provided with a linkage tooth A12, and the other support arm 2 is provided with a linkage tooth B13. The linkage tooth A12 and the linkage tooth B13 mesh. When one of the support arms 2 rotates, the other support arm 2 will rotate synchronously in the opposite direction, and the rotation angles are the same. This can make the support arms 2 rotate synchronously, which can avoid the two support arms 2 rotating at different amplitudes, causing the support seat 6 to shift, which in turn causes the detector 7 to shift, resulting in measurement errors. It can also further stabilize the overall structure.

[0032] To further stabilize the detector 7, based on the above scheme, a limiting plate 16 can be fixed to the guide rail 1 by bolts. The limiting plate 16 has a limiting groove 17, and the support base 6 is slidably disposed within the limiting groove 17. The limiting groove 17 restricts the movement range of the support base 6, ensuring that the support base 6 can only move in a straight line. Therefore, when adjusting the detector 7, it can only be adjusted in a straight line, preventing deflection, reducing manual maintenance procedures, and improving production efficiency.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. An online thickness detection device for a blown film machine, characterized in that: Includes a guide rail (1) and a support base (6). The guide rail (1) has a through hole (5) for the thin film to pass through. The guide rail (1) is connected to the support base (6) through an adjustment component. A detector (7) is provided on the support base (6). A drive mechanism is provided on the adjustment component. The drive mechanism can drive the adjustment component to rotate circumferentially based on the guide rail (1). The support base (6) drives the detector (7) to make circumferential motion based on the through hole (5). The adjustment assembly includes two adjustment parts, which are symmetrically arranged based on the support base (6). Each adjustment part includes a guide seat (3) that is slidably arranged on the guide rail (1). A support arm (2) is rotatably arranged on the guide seat (3). One end of the support arm (2) is rotatably arranged on the support base (6), and an adjustment rod (11) is rotatably arranged on the support arm (2). The other end of the adjustment rod (11) is rotatably arranged on the support base (6). The driving mechanism drives the two guide seats (3) to move relative to each other, causing the two support arms (2) to rotate relative to each other, and adjusting the trajectory of the detector (7) in a circular motion.

2. The online thickness detection device for blown film machine according to claim 1, characterized in that: One of the support arms (2) is provided with a linkage tooth A (12), and the other support arm (2) is provided with a linkage tooth B (13), wherein the linkage tooth A (12) and the linkage tooth B (13) mesh.

3. The online thickness detection device for blown film machine according to claim 2, characterized in that: The guide rail (1) is provided with a limiting plate (16), and the limiting plate (16) is provided with a limiting groove (17) for the support seat (6) to slide.

4. The online thickness detection device for blown film machine according to any one of claims 2 or 3, characterized in that: The driving mechanism includes a driver A (9) disposed on the guide seat (3). Both guide seats (3) are provided with driver A (9). The driving end of the driver A (9) is provided with a gear (14). The guide rail (1) is provided with a tooth groove (10) that meshes with the gear (14). The driver A (9) drives the gear (14) to rotate, thereby causing the guide seat (3) to move in a circular motion based on the guide rail (1).

5. The online thickness detection device for blown film machine according to any one of claims 2 or 3, characterized in that: The driving mechanism includes a driver A (9) disposed on one of the guide seats (3), the driving end of the driver A (9) is provided with a gear (14), and the guide rail (1) is provided with a tooth groove (10) that meshes with the gear (14). The driver A (9) drives the gear (14) to rotate, thereby causing the guide seat (3) to move in a circular motion based on the guide rail (1); the other guide seat (3) is provided with a locking component, which fixes the guide seat (3) on the guide rail (1).

6. The online thickness detection device for a blown film machine according to claim 5, characterized in that: The locking assembly includes a driver B (4) disposed on another guide seat (3), the driving end of the driver B (4) being connected to a locking tooth (15), the locking tooth (15) being nested with the tooth groove (10).

7. A method for online thickness detection of a blown film machine, using the online thickness detection device for a blown film machine as described in claim 4, characterized in that, Includes the following steps: The controller drives the two drivers A (9) to move synchronously in opposite directions, so that the two guide seats (3) move closer to each other or further away from each other; The two guide seats (3) move relative to each other, causing the two support arms (2) to deflect synchronously, adjusting the position of the detector (7) in the through hole (5) to adapt to the size of the film produced this time; The controller drives the two drivers A (9) to move synchronously in the same direction, so that the guide seat (3) drives the detector (7) to move in a circle through the support arm (2) to detect the film thickness.

8. A method for online thickness detection of a blown film machine, using the online thickness detection device for a blown film machine as described in claim 6, characterized in that, Includes the following steps: The controller drives the driver B (4) to run, so that the locking tooth (15) is embedded in the tooth groove (10), and the guide seat (3) with the locking tooth (15) is fixed on the guide rail (1); The controller drives the driver A (9) to run, so that the guide seat (3) on which the driver A (9) is located moves in a circle based on the guide rail (1), so that the two support arms (2) deflect synchronously, and adjust the position of the detector (7) in the through hole (5) to adapt to the size of the film produced this time. The controller causes the driver B (4) to operate, driving the tooth (15) to leave the tooth groove (10). The controller drives the driver A (9) to run, so that the guide seat (3) on which the driver A (9) is located moves in a circle based on the guide rail (1), and drives the detector (7) to move in a circle through the support arm (2) to detect the film thickness.

Images