Polyvinylidene fluoride (PVDF) membrane making device

Abstract

The invention relates to the technical field of high polymer material film making equipment, in particular to a polyvinylidene fluoride (PVDF) film making device which comprises a conveyor, a supporting beam seat is fixedly connected to the middle of a conveyor rack, obliquely-arranged mounting frames are mounted on the opposite sides of two vertical rods of the supporting beam seat, and obliquely-arranged scrapers are mounted in the two mounting frames. According to the PVDF film making device, real-time accurate correction of scraper offset and angle is achieved, the position offset and the angle offset of the scraper are monitored in real time through a detection head, a driving air cylinder is triggered to drive a linkage mechanism to act, offset correction is achieved by clamping a positioning block through an alignment clamping plate, and therefore the scraper can be accurately corrected in real time; and meanwhile, angle correction is completed through attaching and clamping of the guide plate and the positioning block, it is guaranteed that the scraper is in the optimal working posture all the time through a double correction mechanism, the thickness uniformity and surface flatness of the PVDF film are effectively improved, and the product reject ratio is remarkably reduced.

Description

Technical Field

[0001] This invention relates to the field of polymer film-forming equipment technology, specifically to a doctor blade film-forming device for the preparation of polyvinylidene fluoride (PVDF) films, and more particularly to a PVDF film-forming doctor blade positioning and stabilization device with automatic offset correction function. Background Technology

[0002] Polyvinylidene fluoride (PVDF), a polymer material with excellent corrosion resistance, high temperature resistance, and mechanical strength, has its film products widely used in high-end fields such as water treatment filtration, electronic device packaging, and medical consumables. In the PVDF membrane manufacturing process, the doctor blade coating process is the core step that determines the uniformity of film thickness and surface smoothness. The installation accuracy and operational stability of the doctor blade directly affect the performance indicators of the final membrane product.

[0003] However, existing PVDF film forming equipment has the following technical defects in actual operation:

[0004] The scraper is subjected to the impact of raw materials, equipment vibration and temperature changes over a long period of time, which can easily cause lateral deviation or angular tilting, resulting in quality problems such as uneven film thickness and edge wrinkling. This problem can significantly reduce the product qualification rate, especially in continuous large-scale production.

[0005] Traditional scraper correction methods rely heavily on manual periodic inspection and adjustment, which is not only inefficient but also subject to human judgment errors and cannot achieve real-time dynamic correction.

[0006] Some existing automatic correction devices have complex structures and are prone to instantaneous impact forces during the correction process, which can damage the scraper or the mounting structure. At the same time, the locking reliability after correction is insufficient, and secondary displacement is likely to occur.

[0007] The alignment mechanism and the scraper have poor adaptability, making it impossible to simultaneously correct both offset and angle. Furthermore, the linkage response is lagging, making it difficult to meet the process requirements of high-precision film making.

[0008] Therefore, developing a PVDF film-forming device that can detect in real time, automatically and accurately correct, clamp stably, and cause minimal damage to the equipment has become a key requirement to address the pain points of existing technologies. Summary of the Invention

[0009] The purpose of this invention is to provide a polyvinylidene fluoride (PVDF) film-forming device to solve the problem mentioned in the background art that existing PVDF film-forming devices are difficult to automatically correct. To achieve the above objective, this invention provides the following technical solution: a polyvinylidene fluoride (PVDF) film-forming device, including a conveyor, a support beam fixedly connected to the middle of the conveyor frame, and inclined mounting frames installed on opposite sides of the two vertical rods of the support beam, with inclined scrapers installed inside the two mounting frames;

[0010] It also includes two guide plates and four alignment plates. The two guide plates are respectively distributed on both sides of the scraper. Positioning blocks are fixedly installed on both sides of the scraper. The four alignment plates are arranged in parallel and symmetrical pairs. The two sets of alignment plates are respectively hinged to the two guide plates on the side facing the scraper. The two guide plates clamp the positioning blocks on both sides of the scraper through the four alignment plates, so as to achieve precise correction of the scraper offset.

[0011] Preferably, a fixed frame is fixedly installed at the bottom of the support beam, and an inverted U-shaped shell adapted to the tilt angle of the scraper is installed at the bottom of the fixed frame. The inverted U-shaped shell is set outside the scraper through an inverted U-shaped mask, and two guide plates are slidably set on the inner wall of the inverted U-shaped shell, and the sliding direction of the guide plates is perpendicular to the length direction of the scraper.

[0012] Preferably, a drive cylinder is fixedly installed on the top of the inner wall of the inverted U-shaped shell. The telescopic end of the drive cylinder extends into the inside of the inverted U-shaped shell and is fixedly connected to a push plate. Both ends of the push plate are hinged with deflection plates. The end of the deflection plate away from the push plate is hinged with a push plate. The push plate is hinged in a through groove opened on the side of the inverted U-shaped shell, and the push plate can deflect along the through groove.

[0013] Preferably, four offset plates are hinged to the side of the guide plate facing the scraper. The four offset plates are arranged in pairs in parallel. The alignment plate is hinged between the corresponding sets of offset plates. A transmission rod is hinged to the two inner offset plates of the four offset plates. The middle part of the transmission rod is rotatably connected to the hinge between the offset plate and the guide plate. A power plate is hinged to the end of the transmission rod away from the offset plate. An H-shaped plate is hinged between the four power plates. The H-shaped plate overlaps with the end of the push plate on its corresponding side. When the push plate deflects, it can push the H-shaped plate to move.

[0014] Preferably, a limiting telescopic rod is connected between the H-shaped plate and the guide plate to restrict the movement of the H-shaped plate in a direction perpendicular to the guide plate; a buffer block is provided on the side of the H-shaped plate facing the push plate to buffer the squeezing force applied by the push plate.

[0015] Preferably, both ends of the guide plate are provided with T-shaped guide grooves, and a slide plate is slidably connected in the T-shaped guide grooves. Two damping spring telescopic rods are hinged to the side of the slide plate. The two damping spring telescopic rods are distributed in a vertical "V" shape, and the end of the damping spring telescopic rod away from the slide plate is hinged to the guide plate.

[0016] The slide plate is held in place by two damping spring telescopic rods in slots on the inner wall of the inverted U-shaped housing. A roller is rotatably connected to the side of the slide plate at the end inserted into the slot to reduce sliding friction.

[0017] Preferably, a sliding plate is fixedly connected to the alignment plate, and a spring telescopic plate is fixedly connected to the sliding plate. The lower end of the inner rod of the spring telescopic plate abuts against the top of the guide plate to limit the relative displacement between the alignment plate and the guide plate.

[0018] Preferably, a ramp is fixedly connected to the side of the damping spring telescopic rod located on the upper side. The spring telescopic plate is adapted to the ramp. The spring telescopic plate squeezes the ramp, causing the damping spring telescopic rod to deflect, thereby pulling the slide plate to slide in the T-shaped guide groove.

[0019] Preferably, an F-shaped buckle plate is fixedly connected to the slide plate, and an L-shaped locking plate is provided on one side of the F-shaped buckle plate to engage with it. The L-shaped locking plate is fixed on the inner wall of the inverted U-shaped shell to lock the position of the guide plate.

[0020] Preferably, a detection head is fixedly connected to the side of the conveyor frame. The detection head is located on one side of the scraper and is electrically connected to the drive cylinder. It is used to detect the offset of the scraper and trigger the drive cylinder to operate.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] This invention achieves real-time and precise correction of scraper offset and angle: The detection head monitors the position and angle offset of the scraper in real time, triggering the drive cylinder to drive the linkage mechanism. The offset is corrected by clamping the positioning block with the alignment plate, and the angle is corrected by the fit and clamping of the guide plate with the positioning block. The dual correction mechanism ensures that the scraper is always in the optimal working posture, effectively improving the thickness uniformity and surface flatness of PVDF film, and significantly reducing the product defect rate.

[0023] This invention provides stable clamping and reliable locking: the alignment plate achieves synchronous clamping through a linkage structure including a bias plate and a transmission rod, while a spring telescopic plate restricts the displacement of the alignment plate, enhancing clamping stability; after the guide plate is attached to the positioning block, the damping spring telescopic rod drives the F-shaped buckle plate to engage and lock with the L-shaped locking plate, forming a double locking structure, completely eliminating the risk of secondary displacement of the scraper after correction and ensuring the stability of continuous production.

[0024] This invention offers strong buffering and protection, extending equipment lifespan: The mechanism incorporates buffer blocks, damping spring telescopic rods, and spring telescopic plates, effectively absorbing instantaneous impact forces during the correction process and reducing mechanical damage to the scraper, mounting frame, and linkage structure; the roller design at the end of the slide plate reduces sliding friction, and the cooperation between the inclined block and the spring telescopic plate achieves smooth transmission, further enhancing the smoothness and durability of the mechanism's operation.

[0025] This invention features a high degree of automation, which improves production efficiency: the entire correction process requires no manual intervention. The electrical connection between the detection head and the drive cylinder enables fully automated closed-loop control of "detection-triggering-correction-locking", which is responsive and precise. It avoids production interruptions caused by manual adjustments and greatly improves the continuity and efficiency of film production.

[0026] This invention features a compact and coordinated structure: the inverted U-shaped shell integrates functional modules such as drive, linkage, correction, and locking, resulting in a compact layout and small footprint; components such as push plate, deflection plate, H-shaped plate, and transmission rod form a highly efficient linkage, which, together with limit telescopic rod and limit telescopic plate, ensures the precise movement direction of each component, enabling multi-action coordinated correction and locking, simplifying the overall structural design and reducing equipment manufacturing costs. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a partial three-dimensional structural diagram of the present invention;

[0029] Figure 3 This is a three-dimensional structural diagram of the inverted U-shaped housing and the driving cylinder of the present invention;

[0030] Figure 4 This is a three-dimensional cross-sectional view of the inverted U-shaped shell of the present invention;

[0031] Figure 5 This is a three-dimensional structural diagram of the sliding plate and the spring telescopic plate of the present invention;

[0032] Figure 6 This is a three-dimensional structural diagram of the alignment plate and positioning block of the present invention;

[0033] Figure 7 This is a three-dimensional structural diagram of the offset plate and the alignment plate of the present invention;

[0034] Figure 8 This is a three-dimensional structural cross-section of the inverted U-shaped shell of the present invention. Figure 1 ;

[0035] Figure 9 This is a three-dimensional structural cross-section of the inverted U-shaped shell of the present invention. Figure 2 .

[0036] In the diagram: 1. Conveyor; 2. Support beam seat; 3. Mounting frame; 4. Scraper; 5. Fixing frame; 6. Inverted U-shaped shell; 61. Drive cylinder; 62. Push plate; 63. Deflection plate; 64. Pushing plate; 65. Through groove; 7. Guide plate; 71. T-shaped guide groove; 72. Slide plate; 73. Damping spring telescopic rod; 74. Slot; 75. Offset plate; 76. Alignment plate; 77. Positioning block; 78. H-shaped plate; 79. Transmission rod; 710. Power plate; 8. Sliding plate; 81. Spring telescopic plate; 82. F-shaped buckle plate; 83. L-shaped locking plate; 84. Inclined block; 85. Limiting telescopic plate; 9. Detection head. Detailed Implementation

[0037] 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.

[0038] Please see Figures 1 to 9 The present invention provides a technical solution: a polyvinylidene fluoride (PVDF) film forming device, including a conveyor 1, a support beam seat 2 fixedly connected to the middle of the frame of the conveyor 1, an inclined mounting frame 3 installed on the opposite sides of the two vertical rods of the support beam seat 2, and an inclined scraper 4 installed inside the two mounting frames 3.

[0039] A fixed frame 5 is installed at the bottom of the crossbeam of the support beam seat 2. An inverted U-shaped shell 6 is installed at the bottom of the fixed frame 5. The inverted U-shaped shell 6 is set outside the scraper 4 through the inverted U-shaped opening.

[0040] A drive cylinder 61 is installed on the top of the inner wall of the inverted U-shaped housing 6. The telescopic end of the drive cylinder 61 extends into the interior of the inverted U-shaped housing 6 and is fixedly connected to a push plate 62. Both ends of the push plate 62 are hinged to deflection plates 63. The end of the deflection plate 63 away from the push plate 62 is hinged to a push plate 64. The push plate 64 is hinged in the through groove 65 opened on the side of the inverted U-shaped housing 6.

[0041] Two guide plates 7 are slidably arranged on the inner wall of the inverted U-shaped housing 6, and the two guide plates 7 are respectively distributed on both sides of the scraper 4. T-shaped guide grooves 71 are opened at both ends of the guide plates 7. Slide plates 72 are slidably connected in the T-shaped guide grooves 71. Two damping spring telescopic rods 73 are hinged to the side of the slide plate 72, and the end of the damping spring telescopic rod 73 away from the slide plate 72 is hinged to the guide plate 7. The two damping spring telescopic rods 73 are arranged in a vertical "V" shape. The slide plate 72 abuts against the slot 74 opened in the inner wall of the inverted U-shaped housing 6 through the two damping spring telescopic rods 73. A roller is rotatably connected to the side of the end of the slide plate 72 that is inserted into the slot 74 to reduce the friction of the slide plate 72 sliding inside the slot 74.

[0042] Four offset plates 75 are hinged to the side of the guide plate 7 facing the scraper 4. The four offset plates 75 are arranged in pairs in parallel. Two alignment plates 76 are hinged to the end of the four offset plates 75 away from the guide plate 7. A positioning block 77 is arranged between the two alignment plates 76. The two positioning blocks 77 are respectively installed on both sides of the scraper 4. The two guide plates 7 clamp the positioning blocks 77 on both sides of the scraper 4 through the four alignment plates 76, with each pair of alignment plates 76 forming a group, thereby correcting the offset of the scraper 4.

[0043] Of the four bias plates 75 on the same side, the two inner bias plates 75 are each hinged with a transmission rod 79. The middle part of the transmission rod 79 is rotatably connected to the hinge between the bias plate 75 and the guide plate 7. The end of the transmission rod 79 away from the bias plate 75 is hinged with a power plate 710. An H-shaped plate 78 is hinged between the four power plates 710. A limit telescopic rod is connected between the H-shaped plate 78 and the guide plate 7 to limit the movement direction of the H-shaped plate 78 and ensure that it moves stably in a direction perpendicular to the guide plate 7. The H-shaped plate 78 overlaps with the end of the push plate 64 on its corresponding side, and a buffer block is provided on the side of the H-shaped plate 78 facing the push plate 64 to buffer the squeezing force applied by the push plate 64 to the H-shaped plate 78.

[0044] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, a sliding plate 8 is fixedly connected to the alignment plate 76, and a spring telescopic plate 81 is fixedly connected to the sliding plate 8. The lower end of the inner rod of the spring telescopic plate 81 abuts against the top of the guide plate 7.

[0045] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the damping spring telescopic rod 73 located on the upper side has a ramp block 84 fixedly connected to its side. The extension of the inner rod of the spring telescopic plate 81 squeezes the ramp block 84, causing the damping spring telescopic rod 73 to deflect, thereby pulling the slide plate 72 to slide in the T-shaped guide groove 71 and pulling the slide plate 72 out of the slot 74.

[0046] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, an F-shaped buckle plate 82 is fixedly connected to the slide plate 72. An L-shaped locking plate 83 is provided on one side of the F-shaped buckle plate 82 for fastening with it. The F-shaped buckle plate 82 and the L-shaped locking plate 83 are in a separated state. The L-shaped locking plate 83 is fixed on the inner wall of the inverted U-shaped housing 6.

[0047] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, a detection head 9 is fixedly connected to the side of the conveyor frame 1. The detection head 9 is located on one side of the scraper 4 and is electrically connected to the drive cylinder 61. After the scraper 4 is detected to be offset by the detection head 9, the drive cylinder 61 is controlled to run by the PLC controller connected to it. This is existing technology and will not be described in detail here.

[0048] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, a limiting telescopic plate 85 is fixedly connected between the guide plate 7 and the inner wall of the inverted U-shaped housing 6. The limiting telescopic plate 85 enhances the stability of the guide plate 7 sliding towards the scraper 4 inside the inverted U-shaped housing 6.

[0049] The method of use and advantages of this invention: The working process of this polyvinylidene fluoride (PVDF) film-forming device is as follows:

[0050] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the scraper 4 is installed at an angle on the support beam seat 2 through the mounting frame 3, and then the raw material of polyvinylidene fluoride (PVDF) is transported by the conveyor 1. The scraper 4 is used to scrape the raw material thin to achieve the purpose of film making.

[0051] When the scraper 4 scrapes the raw material thin, the detection head 9 periodically detects the positional and angular offset of the scraper 4. When the deflection angle of the scraper 4 is greater than the maximum limit angle or the offset distance is greater than the maximum limit distance, the detection head 9 sends a signal to cause the drive cylinder 61 to extend and push the push plate 62 to move down. The push plate 62 moves down and squeezes the deflection plate 63, causing the lower end of the push plate 64 to deflect and squeeze the H-shaped plate 78. The movement of the H-shaped plate 78 pushes the power plate 710 to deflect, causing the transmission rod 79 to drive the deflection plate 75 to deflect.

[0052] At this time, the deflection of the offset plate 75 causes the two alignment plates 76 on the same side to move relative to each other, clamping them on both sides of the positioning block 77, and correcting the offset distance of the positioning block 77.

[0053] Furthermore, when the alignment plate 76 moves to clamp the positioning block 77, the sliding plate 8 slides on the guide plate 7, causing the inner rod of the spring telescopic plate 81 to extend and abut against the side of the guide plate 7 facing the push plate 64, thus limiting the relative displacement between the alignment plate 76 and the guide plate 7, enhancing the stability of the clamping of the positioning block 77 by the two alignment plates 76, and further limiting the displacement of the positioning block 77 and the scraper 4 due to shaking.

[0054] Furthermore, when the spring telescopic plate 81 extends, its lower end presses against the inclined block 84, causing the inclined block 84 to drive the damping spring telescopic rod 73 to deflect, thereby causing the slide plate 72 to slide out of the slot 74, releasing the locking state of the slot 74 on the slide plate 72.

[0055] Then, the push plate 64 continues to push the two sets of H-shaped plates 78 and guide plates 7 on both sides of the scraper 4 to move closer to their corresponding positioning blocks 77, so as to fit and clamp the positioning blocks 77, thereby achieving the purpose of further correcting the angle of the scraper 4 between the two positioning blocks 77, and helping to further strengthen the stability of the connection between the mounting frame 3 and the scraper 4.

[0056] When the guide plate 7 comes into contact with the positioning block 77, the drive cylinder 61 stops extending. At this time, the damping spring telescopic rod 73 drives the F-shaped buckle plate 82 to fasten onto the L-shaped locking plate 83, locking the guide plate 7 that is attached to the positioning block 77, and further enhancing the stability of the guide plate 7 clamping the positioning block 77.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polyvinylidene fluoride (PVDF) film forming device, comprising a conveyor (1), a support beam seat (2) fixedly connected to the middle of the frame of the conveyor (1), and inclined mounting frames (3) installed on opposite sides of the two vertical rods of the support beam seat (2), with inclined scrapers (4) installed inside the two mounting frames (3). Its features are: It also includes two guide plates (7) and four alignment plates (76). The two guide plates (7) are respectively distributed on both sides of the scraper (4). Positioning blocks (77) are fixedly installed on both sides of the scraper (4). The four alignment plates (76) are arranged in parallel and symmetrically in pairs. The two sets of alignment plates (76) are respectively hinged to the two guide plates (7) on the side facing the scraper (4). The two guide plates (7) clamp the positioning blocks (77) on both sides of the scraper (4) through the four alignment plates (76) to achieve precise correction of the offset of the scraper (4).

2. The polyvinylidene fluoride (PVDF) film-forming device according to claim 1, characterized in that: A fixed frame (5) is fixedly installed at the bottom of the crossbeam of the support beam seat (2). An inverted U-shaped shell (6) adapted to the tilt angle of the scraper (4) is installed at the bottom of the fixed frame (5). The inverted U-shaped shell (6) is set outside the scraper (4) through an inverted U-shaped mask. Two guide plates (7) are slidably set on the inner wall of the inverted U-shaped shell (6), and the sliding direction of the guide plates (7) is perpendicular to the length direction of the scraper (4).

3. The polyvinylidene fluoride (PVDF) film-forming device according to claim 2, characterized in that: A drive cylinder (61) is fixedly installed on the top of the inner wall of the inverted U-shaped housing (6). The telescopic end of the drive cylinder (61) extends into the interior of the inverted U-shaped housing (6) and is fixedly connected to a push plate (62). Both ends of the push plate (62) are hinged to deflection plates (63). The end of the deflection plate (63) away from the push plate (62) is hinged to a push plate (64). The push plate (64) is hinged in the through groove (65) opened on the side of the inverted U-shaped housing (6), and the push plate (64) can deflect along the through groove (65).

4. A polyvinylidene fluoride (PVDF) film-forming device according to claim 3, characterized in that: The guide plate (7) has four offset plates (75) hinged to the side facing the scraper (4). The four offset plates (75) are arranged in pairs in parallel. The alignment plate (76) is hinged between the corresponding sets of offset plates (75). Two of the four bias plates (75) located on the inner side are hinged with transmission rods (79). The middle part of the transmission rod (79) is rotatably connected to the hinge between the bias plate (75) and the guide plate (7). The end of the transmission rod (79) away from the bias plate (75) is hinged with a power plate (710). An H-shaped plate (78) is hinged between the four power plates (710). The H-shaped plate (78) overlaps with the end of the push plate (64) on its corresponding side. When the push plate (64) deflects, it can push the H-shaped plate (78) to move.

5. A polyvinylidene fluoride (PVDF) film-forming device according to claim 4, characterized in that: A limit telescopic rod is connected between the H-shaped plate (78) and the guide plate (7) to limit the movement of the H-shaped plate (78) in a direction perpendicular to the guide plate (7); a buffer block is provided on the side of the H-shaped plate (78) facing the push plate (64) to buffer the squeezing force applied by the push plate (64).

6. A polyvinylidene fluoride (PVDF) film-forming device according to claim 1, characterized in that: T-shaped guide grooves (71) are provided at both ends of the guide plate (7). A slide plate (72) is slidably connected in the T-shaped guide groove (71). Two damping spring telescopic rods (73) are hinged to the side of the slide plate (72). The two damping spring telescopic rods (73) are arranged in a vertical "V" shape, and the end of the damping spring telescopic rod 73 away from the slide plate (72) is hinged to the guide plate (7). The slide (72) abuts against the slot (74) opened in the inner wall of the inverted U-shaped housing (6) through two damping spring telescopic rods (73). The side of the slide (72) inserted into the slot (74) is rotatably connected to a roller to reduce sliding friction.

7. A polyvinylidene fluoride (PVDF) film-forming device according to claim 6, characterized in that: A sliding plate (8) is fixedly connected to the alignment plate (76), and a spring telescopic plate (81) is fixedly connected to the sliding plate (8). The lower end of the inner rod of the spring telescopic plate (81) abuts against the top of the guide plate (7) to limit the relative displacement between the alignment plate (76) and the guide plate (7).

8. A polyvinylidene fluoride (PVDF) film-forming device according to claim 6, characterized in that: The damping spring telescopic rod (73) located on the upper side is fixedly connected to the inclined block (84). The spring telescopic plate (81) is adapted to the inclined block (84). The spring telescopic plate (81) squeezes the inclined block (84) to drive the damping spring telescopic rod (73) to deflect, thereby pulling the slide plate (72) to slide in the T-shaped guide groove (71).

9. A polyvinylidene fluoride (PVDF) film-forming device according to claim 2, characterized in that: An F-shaped buckle plate (82) is fixedly connected to the slide plate (72). An L-shaped locking plate (83) is provided on one side of the F-shaped buckle plate (82) to engage with it. The L-shaped locking plate (83) is fixed on the inner wall of the inverted U-shaped shell (6) to lock the position of the guide plate (7).

10. A polyvinylidene fluoride (PVDF) film-forming device according to claim 2, characterized in that: A detection head (9) is fixedly connected to the side of the conveyor (1) frame. The detection head (9) is located on one side of the scraper (4) and is electrically connected to the drive cylinder (61). It is used to detect the offset of the scraper (4) and trigger the drive cylinder (61) to move.

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