A kind of polyimide film production is with defect detection device

Abstract

The application relates to the technical field of transparency detection, and discloses a defect detection device for polyimide film production, which comprises a base A, clamping seats are fixedly connected to the top of the base A on both sides, a glass plate is fixedly connected to one side of the top of the base A close to a main detection head, a bearing frame is slidingly connected to the top of the base A, a limiting frame is fixedly connected to the top of the bearing frame, a sliding groove is formed in the inner top wall and the inner bottom wall of the limiting frame, two mounting frames are slidingly connected between the sliding grooves, a mounting frame is slidingly connected in the mounting frame, a mounting seat is fixedly connected to one side of the mounting frame close to the glass plate, two rotating rods are rotationally connected to one side of the mounting seat close to the glass plate in a clamping mode, and a belt is arranged between the two rotating rods. The defect detection device for polyimide film production can avoid the problem that, when a traditional device detects the light transmittance of a polyimide film, the polyimide film sample is easily deviated in position due to external factors, thereby affecting the final detection result.

Description

Technical Field

[0001] This invention relates to the field of transparent inspection technology, specifically to a defect detection device for polyimide film production. Background Technology

[0002] Polyimide film, also known as PI film, is mainly used in the production of cable insulation materials, heat insulation materials, radiation protection materials, recording carrier materials, and flexible printed circuit board materials. With the development of society, polyimide film has become an important material in the power, electrical appliance, microelectronics, and precision machinery industries. During the production process of polyimide film, multiple defect detections are required to ensure that the polyimide film is qualified and can be used normally.

[0003] When inspecting polyimide films for various defects, transmittance testing is generally performed to ensure their performance quality in applications such as optics and electronic devices. The main equipment used for transmittance testing of polyimide films is a transmittance meter. The transmittance meter is based on the principle of light transmission to measure the transmittance of the object being tested. The transmittance meter is generally equipped with a stand, two detection heads, and a main unit. One of the two detection heads is mainly used to emit light, while the other is mainly used to receive light. By fixing the two detection heads on both sides of the stand, the polyimide film sample to be tested is placed between the two detection heads. Then, light is emitted through one detection head, and the other detection head receives the light passing through the polyimide film sample and transmits the signal to the main unit. After analysis, the main unit displays the analysis results on the screen. At this time, the staff can directly know the transmittance of the polyimide film sample being tested and determine whether the polyimide film is a qualified product.

[0004] When using a transmittance meter to test the transmittance of polyimide film, it is necessary to ensure that the polyimide film is perpendicular to the light source. However, due to its lightness and thinness, when the polyimide film is placed vertically in the middle of the transmittance meter's support, it is easily shifted by external factors. This disrupts the perpendicularity between the polyimide film and the light source, affecting the final result of the transmittance test. Therefore, we propose a defect detection device for polyimide film production. Summary of the Invention

[0005] The purpose of this invention is to provide a defect detection device for polyimide film production, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a defect detection device for polyimide film production, comprising a base A, wherein clamps are fixedly connected to both sides of the top of the base A, and each clamp has a fixing opening. A main detection head and a secondary detection head are respectively inserted into the fixing openings of the two clamps. A glass plate is fixedly connected to the top of the base A near the main detection head. A load-bearing frame is slidably connected to the top of the base A. The load-bearing frame is located between the glass plate and the secondary detection head. A limit frame is fixedly connected to the top of the load-bearing frame. Sliding grooves are provided on the inner top wall and inner bottom wall of the limit frame. Two mounting frames are slidably connected between the sliding grooves.

[0007] A mounting frame is slidably connected inside the mounting frame. A mounting base is fixedly connected to the side of the mounting frame near the glass plate. Two rotating rods are rotatably connected to the side of the mounting base near the glass plate. A belt is provided between the two rotating rods.

[0008] Preferably, a docking frame is fixedly connected to the top of the limiting frame away from the glass plate, and a connecting groove is provided on the side of the docking frame close to the limiting frame. The connecting groove is interconnected with the sliding groove on the inner top wall of the limiting frame. A magnet is fixedly connected in the connecting groove, and a gap is provided between the magnet and the inner wall of the connecting groove.

[0009] Preferably, a fixing frame is fixedly connected to the top of the mounting frame near the docking frame, and a metal plate is fixedly connected to the end of the fixing frame away from the mounting frame. The metal plates on the two mounting frames are respectively located on both sides of the magnet block, and the gap width between the magnet block and the inner wall of the connecting groove is the same as the thickness of the metal plate.

[0010] Preferably, the inner wall of the docking frame is provided with a storage groove, a limiting block is slidably connected in the storage groove, a plurality of fixing springs are fixedly connected between the limiting block and the inner wall of the storage groove, both ends of the limiting block are provided with inclined guide surfaces, and the side of the limiting block away from the fixing springs is in contact with the magnet block and the metal plate.

[0011] Preferably, limit springs are fixedly connected to the inner walls of both ends of the slide, and the end of the limit spring away from the inner wall of the slide is fixedly connected to the mounting frame on the same side.

[0012] Preferably, a base B is rotatably connected to one side of the bottom of the base A, and an installation opening is provided on the base B, into which a fixed seat is rotatably connected.

[0013] Preferably, a host is slidably connected inside the fixed base. The host is connected to the main detection head and the auxiliary detection head respectively via data cables. The host is equipped with a display screen and control buttons.

[0014] Preferably, an arc-shaped limiting groove B is provided on one side of the base B, and a limiting rod is rotatably connected to the side of the base B near the limiting groove B. A slider is fixedly connected to the limiting rod, and the slider on the limiting rod is located in the limiting groove B and slidably connected to it.

[0015] Preferably, the base A has an arc-shaped limiting groove A on the side near the limiting groove B, the limiting groove A and the limiting groove B are connected to each other, and the arc center of the limiting groove A and the limiting groove B are aligned with the rotation axis of the limiting rod.

[0016] Preferably, the inner top wall of the fixing port is provided with a mounting groove, a rubber pad is slidably connected in the mounting groove, a screw is threadedly connected to the top of the clamp, the bottom end of the screw is fixedly connected to the rubber pad, and a knob is fixedly connected to the top end of the screw.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This invention involves attaching a polyimide film sample to a glass plate, then manually pushing the load-bearing frame to bring the limiting frame closer to the glass plate until the belt adheres to the polyimide film sample on the glass plate. Continued compression causes the metal plate and magnet to shift, at which point the magnet's attraction to the metal plate disappears, the limiting spring contracts, and the mounting frame moves to both sides of the limiting frame. Simultaneously, through the interaction of the rotating rod and belt, the polyimide film sample is smoothed during clamping, resulting in a more even surface. This avoids the problem in traditional devices where the polyimide film sample is easily displaced due to external factors, affecting the final test results.

[0019] 2. After the test is completed, the operator holds the two mounting frames by hand and pulls the load-bearing frame back. At this time, the load-bearing frame separates from the glass plate, and the two mounting frames are closed by applying force with the fingers. When the metal plate moves to both sides of the limiting block, it will be squeezed into the storage groove by the inclined surfaces at both ends of the limiting block. Then the metal plate and the limiting block are attached. After that, the fixing spring begins to rebound, driving the limiting block to extend out of the storage groove. The limiting block pushes the metal plate to both sides of the magnet block. At this time, the metal plate can be attracted by the magnet block, thereby limiting the mounting frame and facilitating the transmittance test of the next polyimide film sample. This effectively improves the auxiliary function of the device when testing multiple polyimide film samples.

[0020] 3. When using this device, the limiting rod can be rotated to move the slider on it into the limiting groove B. At this time, the limiting between base A and base B disappears. Rotate base B to make it parallel to base A. Then, the main unit can be placed on the fixed seat. The tilt angle of the main unit can be adjusted by rotating the fixed seat. This avoids the problem of the operator having to hold the main unit with one hand and operate the sample with the other when testing multiple polyimide film samples, which is quite troublesome. This further improves the auxiliary function of the device for operators when testing the transmittance of polyimide film samples. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the unfolded structure of base B of the present invention;

[0023] Figure 3 This is a schematic diagram of the bottom structure of base B of the present invention;

[0024] Figure 4 This is a schematic diagram of the limiting frame structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the connection structure between the mounting frame and the mounting base of the present invention;

[0026] Figure 6 This is a schematic diagram of the cross-sectional structure of the docking frame of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the storage slot of the present invention;

[0028] Figure 8 For the present invention Figure 5 A magnified structural diagram of area A is shown below;

[0029] Figure 9 For the present invention Figure 6 The diagram shows an enlarged view of area B.

[0030] Figure 10 For the present invention Figure 7 The diagram shows an enlarged view of region C.

[0031] In the diagram: 1. Base A; 11. Limiting groove A; 2. Base B; 21. Limiting groove B; 22. Limiting rod; 23. Mounting port; 24. Fixing seat; 3. Clamping seat; 31. Fixing port; 32. Mounting groove; 33. Screw; 34. Rubber pad; 35. Knob; 4. Main unit; 41. Main detection head; 42. Secondary detection head; 5. Glass plate; 6. Load-bearing frame; 61. Limiting frame; 62. Slide groove; 63. Limiting spring; 64. Mounting frame; 7. Connecting frame; 71. Connecting groove; 72. Magnet block; 73. Storage groove; 74. Limiting block; 75. Fixing spring; 8. Mounting frame; 81. Mounting seat; 82. Rotating rod; 83. Belt; 84. Fixing frame; 85. Metal plate. Detailed Implementation

[0032] 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.

[0033] Please see Figure 1-10This invention provides a technical solution: a defect detection device for polyimide film production, comprising a base A1, with clamps 3 fixedly connected to both sides of the top of the base A1. Each clamp 3 has a fixing opening 31. A main detection head 41 and a secondary detection head 42 are respectively inserted into the fixing openings 31 of the two clamps 3. The main detection head 41 is a light-receiving component, and the secondary detection head 42 is a light-emitting component. Light emitted through the secondary detection head 42 is received by the main detection head 41 when it passes through the polyimide film sample. At this time, the main detection head 41... The received light data can be transmitted to ultimately complete the detection of the transmittance of the polyimide film sample. A glass plate 5 is fixedly connected to the top of the base A1 near the main detection head 41. A load-bearing frame 6 is slidably connected to the top of the base A1. The load-bearing frame 6 is located between the glass plate 5 and the secondary detection head 42. A limit frame 61 is fixedly connected to the top of the load-bearing frame 6. Sliding grooves 62 are provided on the inner top and bottom walls of the limit frame 61. Two mounting frames 64 are slidably connected between the sliding grooves 62. A mounting frame 64 is slidably connected within the mounting frame 64. Mounting bracket 8, with mounting base 81 fixedly connected to the side of mounting bracket 8 near glass plate 5. Two rotating rods 82 are rotatably connected to the side of mounting base 81 near glass plate 5, and a belt 83 is provided between the two rotating rods 82. A docking bracket 7 is fixedly connected to the top of limiting bracket 61 away from glass plate 5. A connecting groove 71 is formed on the side of docking bracket 7 near limiting bracket 61, communicating with a sliding groove 62 on the inner top wall of limiting bracket 61. A magnet 72 is fixedly connected within the connecting groove 71. A gap is provided between the inner walls. A fixing frame 84 is fixedly connected to the top of the mounting frame 8 near the docking frame 7. A metal plate 85 is fixedly connected to the end of the fixing frame 84 away from the mounting frame 8. The metal plates 85 on the two mounting frames 8 are respectively located on both sides of the magnet block 72. The gap width between the magnet block 72 and the inner wall of the connecting groove 71 is the same as the thickness of the metal plate 85. Limiting springs 63 are fixedly connected to the inner walls of both ends of the slide groove 62. The end of the limiting spring 63 away from the inner wall of the slide groove 62 is fixedly docked with the mounting frame 64 on the same side.

[0034] Furthermore, when using the device, the main detection head 41 and the auxiliary detection head 42 are placed in the fixing ports 31 of the corresponding clamps 3 and fixed. Then, the polyimide film sample to be tested is attached to the glass plate 5. Then, the load-bearing frame 6 is manually pushed to move the limiting frame 61 toward the glass plate 5. When the belt 83 is attached to the polyimide film sample on the glass plate 5, the limiting frame 61 is pushed further to apply a certain pressure. At this time, the mounting frame 8 is under pressure and begins to move along the mounting frame 64. At this time, the mounting frame 8 will drive the metal plate 85 to move together. When the metal plate 85 is misaligned with the magnet 72, the attraction of the magnet 72 to the metal plate 85 disappears. At this time, the limiting spring 63 located on one side of the mounting frame 64 begins to contract, driving the mounting frame 64 connected to it to move along the slide 62, so that the two mounting frames 64 separate from each other. During this process, due to the belt 8 3. The polyimide film sample is bonded to the glass plate 5. During the movement of the mounting frame 64, the mounting bracket 8 will move, and the mounting bracket 8 will move the mounting base 81. At this time, the belt 83 starts to rotate along the two rotating rods 82. During this process, the belt 83 can stretch and smooth the polyimide film sample bonded to the glass plate 5. After the mounting frame 64 moves to the end of the slide groove 62, the belt 83 will bond to both sides of the polyimide film sample and cooperate with the glass plate 5 to clamp the polyimide film sample bonded to the glass plate 5, making it flat for light transmittance detection. Then, the secondary detection head 42 is opened, and the secondary detection head 42 emits light. After the light passes through the polyimide film sample and the glass plate 5, the main detection head 41 receives the light and detects the light transmittance of the polyimide film sample based on the result of the light.

[0035] Combined with appendix Figure 4 , Figure 6 , Figure 7 , Figure 9 and Figure 10 As shown, the inner wall of the docking frame 7 is provided with a storage groove 73, and a limiting block 74 is slidably connected in the storage groove 73. Several fixing springs 75 are fixedly connected between the limiting block 74 and the inner wall of the storage groove 73. Both ends of the limiting block 74 are provided with inclined guide surfaces. The side of the limiting block 74 away from the fixing springs 75 is in contact with the magnet block 72 and the metal plate 85.

[0036] Furthermore, when the mounting frame 8 is compressed, it will cause the metal plate 85 to move towards the limiting block 74 and compress the limiting block 74. At this time, the limiting block 74 will retract into the receiving groove 73, and the fixing spring 75 will retract. When the metal plate 85 moves away from the limiting block 74, the compressive force on the limiting block 74 will disappear, and the fixing spring 75 will begin to rebound, causing the limiting block 74 to extend out of the receiving groove 73. After the transmittance of the current polyimide film sample is tested, the operator pinches the two mounting frames 64 with their fingers, bringing the two mounting frames 64 closer together and stretching the limiting spring 63. When the mounting frames 64 move, they can drive the mounting frame 8 and the metal plate 85 to move synchronously. During the movement of the metal plate 85... The metal plate 85 can move towards the limiting block 74. When the metal plate 85 is attached to the inclined guide surfaces on both sides of the limiting block 74, it will press against the limiting block 74 along the guide surfaces, causing it to move towards the receiving groove 73. When the metal plate 85 is attached to the side of the limiting block 74 near the magnet block 72, the rebound force of the fixing spring 75 will push the metal plate 85 through the limiting block 74. At this time, the mounting frame 8 will slide along the mounting frame 64, and the metal plate 85 will be attached to both sides of the magnet block 72. At this time, the magnet block 72 will attract the metal plate 85 and limit the position of the mounting frame 64. At this time, the device can be reset, which is convenient for subsequent transmittance testing of polyimide film samples.

[0037] Combined with appendix Figure 1 , Figure 2 and Figure 3 As shown, a base B2 is rotatably connected to one side of the bottom of the base A1. A mounting opening 23 is provided on the base B2, and a fixed seat 24 is rotatably connected within the mounting opening 23. A main unit 4 is slidably connected within the fixed seat 24. Damping pads are added between the two sides of the fixed seat 24 and the inner wall of the mounting opening 23. The damping effect of the damping pads improves the stability of the fixed seat 24 when the main unit 4 is placed on it. The main unit 4 is connected to the main detection head 41 and the auxiliary detection head 42 via data cables. The main unit 4 is equipped with a display... The base B2 has an arc-shaped limiting groove B21 on one side. A limiting rod 22 is rotatably connected to the side of the base B2 near the limiting groove B21. A slider is fixedly connected to the limiting rod 22. The slider on the limiting rod 22 is located in the limiting groove B21 and is slidably connected to it. An arc-shaped limiting groove A11 is provided on the side of the base A1 near the limiting groove B21. The limiting groove A11 and the limiting groove B21 are interconnected. The arc centers of the limiting grooves A11 and B21 are aligned with the rotation axis of the limiting rod 22.

[0038] Furthermore, when using the device, rotate the limiting rod 22 so that the slider on it slides from the limiting groove A11 into the limiting groove B21. At this time, the limiting effect between the base A1 and the base B2 disappears, and the base B2 can be rotated so that it is horizontally unfolded with the base A1. Then, the base A1 and the base B2 are placed flat on the operating table. Then, the main unit 4 is clamped on the fixed base 24 and the fixed base 24 is rotated. The tilt angle of the main unit 4 is adjusted according to the operator's viewing height so that the angle is more convenient for the operator to view. When testing the polyimide film sample, the relevant operation control can be performed through the control buttons on the main unit 4. Then, the main detection head 41 will transmit the detection results to the main unit 4. The main unit 4 analyzes the data and displays the final light transmittance result on the display screen for the staff to view.

[0039] It is worth noting that damping pads are added between the two sides of the mounting base 24 and the inner wall of the mounting port 23. Through the damping effect of the damping pads, when the host 4 is placed on the mounting base 24, the mounting base 24 can be rotated without the mounting base 24 rotating on its own due to the shift of the center of gravity of the host 4, thus affecting the stability of the host 4.

[0040] Combined with appendix Figure 3 As shown, the inner top wall of the fixing port 31 is provided with a mounting groove 32, a rubber pad 34 is slidably connected in the mounting groove 32, a screw 33 is threadedly connected to the top of the clamp 3, the bottom end of the screw 33 is fixedly connected to the rubber pad 34, and a knob 35 is fixedly connected to the top end of the screw 33.

[0041] Furthermore, before using the device, the main detection head 41 and the auxiliary detection head 42 are respectively inserted into the fixing ports 31 of the two clamps 3. Then, the screw 33 is rotated by the knob 35. During the rotation of the screw 33, the rubber pad 34 is lowered. When the rubber pad 34 is attached to the top of the main detection head 41 and the auxiliary detection head 42, the main detection head 41 and the auxiliary detection head 42 are clamped, thus fixing the main detection head 41 and the auxiliary detection head 42 and making them more stable during operation. When it is necessary to disassemble the main detection head 41 and the auxiliary detection head 42, the screw 33 is rotated in the opposite direction, and the rubber pad 34 is raised by the screw 33, so that the rubber pad 34 is separated from the main detection head 41 and the auxiliary detection head 42. At this time, the limiting effect of the main detection head 41 and the auxiliary detection head 42 disappears, and the main detection head 41 and the auxiliary detection head 42 can be directly removed from the fixing port 31. The device should be properly stored for future use.

[0042] Working principle: When using this device, rotate the limiting rod 22 so that the slider on it slides from the limiting groove A11 into the limiting groove B21. At this time, the limiting effect between the base A1 and the base B2 disappears. Then, rotate the base B2 so that it is horizontally unfolded with the base A1. After that, the base A1 and the base B2 are placed flat on the operating table. Then, the main unit 4 is locked on the fixed base 24 and the fixed base 24 is rotated to adjust the tilt angle of the main unit 4 according to the operator's viewing height.

[0043] Then, the main detection head 41 and the auxiliary detection head 42 are placed in the fixing port 31 of the corresponding clamp 3. The screw 33 is rotated by the knob 35. During the rotation, the screw 33 can drive the rubber pad 34 to descend. When the rubber pad 34 is attached to the top of the main detection head 41 and the auxiliary detection head 42, the clamping work of the main detection head 41 and the auxiliary detection head 42 can be completed, thereby fixing the main detection head 41 and the auxiliary detection head 42.

[0044] Next, the polyimide film sample to be tested is attached to the glass plate 5. Then, the load-bearing frame 6 is manually pushed, causing the limiting frame 61 to move towards the glass plate 5. When the belt 83 is attached to the polyimide film sample on the glass plate 5, the limiting frame 61 is pushed further, applying a certain pressure. At this time, the mounting frame 8 is under pressure and begins to move along the mounting frame 64. Meanwhile, the mounting frame 8 will move the metal plate 85 together. When the metal plate 85 and the magnet 72 are misaligned, the attraction of the magnet 72 to the metal plate 85 disappears. At this time, the limiting spring 63 on one side of the mounting frame 64 begins to contract, causing the mounting frame 64 connected to it to move along the slide 62, separating the two mounting frames 64 from each other. During this process, because the belt 83 is attached to the polyimide film sample on the glass plate 5, the movement of the mounting frame 64 will cause the mounting frame 8 to move. The mounting frame 8 moves the mounting base 81, at which point the belt 83 starts to rotate along the two rotating rods 82. During this process, the belt 83 stretches and smooths the polyimide film sample attached to the glass plate 5. After the mounting frame 64 moves to the end of the slide 62, the belt 83 will fit against both sides of the polyimide film sample and cooperate with the glass plate 5 to clamp the polyimide film sample attached to the glass plate 5, making it flat for light transmittance testing. Then, the secondary detection head 42 is opened, emitting light. After the light passes through the polyimide film sample and the glass plate 5, the main detection head 41 receives the light and transmits the test results to the host 4. The host 4 analyzes the data and displays the final light transmittance result on the display screen for staff to view.

[0045] After the transmittance of the current polyimide film sample is tested, the operator pinches the two mounting frames 64 together, stretching the limiting spring 63. As the mounting frames 64 move, they drive the mounting bracket 8 and the metal plate 85 to move synchronously. During this movement, the metal plate 85 moves towards the limiting block 74. When the metal plate 85 comes into contact with the inclined guide surfaces on both sides of the limiting block 74, it presses against the guide surfaces, causing the limiting block 74 to move towards the receiving groove 73. When the metal plate 85 is attached to the side of the limiting block 74 near the magnet 72, the rebound force of the fixing spring 75 will push the metal plate 85 through the limiting block 74. At this time, the mounting frame 8 will slide along the mounting frame 64 and the metal plate 85 will be attached to both sides of the magnet 72. The magnet 72 will then attract the metal plate 85 and limit the position of the mounting frame 64. The device reset is then complete. The operation can be repeated to perform transmittance testing on subsequent polyimide film samples.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A defect detection device for polyimide film production, comprising a base A (1), wherein clamps (3) are fixedly connected to both sides of the top of the base A (1), and each clamp (3) has a fixing port (31), wherein a main detection head (41) and a secondary detection head (42) are respectively inserted into the fixing ports (31) of the two clamps (3), characterized in that: A glass plate (5) is fixedly connected to the top of the base A (1) near the main detection head (41). A load-bearing frame (6) is slidably connected to the top of the base A (1). The load-bearing frame (6) is located between the glass plate (5) and the auxiliary detection head (42). A limit frame (61) is fixedly connected to the top of the load-bearing frame (6). Slide grooves (62) are provided on the inner top wall and inner bottom wall of the limit frame (61). Two mounting frames (64) are slidably connected between the slide grooves (62). A docking frame (7) is fixedly connected to the top of the limiting frame (61) away from the glass plate (5). A connecting groove (71) is opened on the side of the docking frame (7) close to the limiting frame (61). The connecting groove (71) is connected to the sliding groove (62) on the inner top wall of the limiting frame (61). A magnet block (72) is fixedly connected in the connecting groove (71). A gap is provided between the magnet block (72) and the inner wall of the connecting groove (71). An installation frame (8) is slidably connected inside the installation frame (64). An installation base (81) is fixedly connected to the side of the installation frame (8) near the glass plate (5). Two rotating rods (82) are fitted and rotatably connected to the side of the installation base (81) near the glass plate (5). A belt (83) is provided between the two rotating rods (82). A fixing frame (84) is fixedly connected to the top of the installation frame (8) near the docking frame (7). A metal plate (85) is fixedly connected to the end of the fixing frame (84) away from the installation frame (8). The metal plates (85) on the two installation frames (8) are located on both sides of the magnet block (72). The gap width between the magnet block (72) and the inner wall of the connecting groove (71) is the same as the thickness of the metal plate (85). When the load-bearing frame (6) is pushed so that the belt (83) is attached to the polyimide film sample on the glass plate (5), the limiting frame (61) is pushed. At this time, the mounting frame (8) is under pressure. When the metal plate (85) and the magnet (72) are misaligned, the limiting spring (63) begins to contract, causing the two mounting frames (64) to separate from each other. During this process, since the belt (83) is attached to the polyimide film sample on the glass plate (5), the belt (83) can stretch and smooth the polyimide film sample attached to the glass plate (5) during the movement of the mounting frame (64).

2. The defect detection device for polyimide film production according to claim 1, characterized in that: The inner wall of the docking frame (7) is provided with a storage groove (73). A limiting block (74) is slidably connected in the storage groove (73). Several fixing springs (75) are fixedly connected between the limiting block (74) and the inner wall of the storage groove (73). Both ends of the limiting block (74) are provided with inclined guide surfaces. The side of the limiting block (74) away from the fixing springs (75) is in contact with the magnet block (72) and the metal plate (85).

3. The defect detection device for polyimide film production according to claim 1, characterized in that: Limiting springs (63) are fixedly connected to the inner walls of both ends of the slide (62), and the end of the limiting spring (63) away from the inner wall of the slide (62) is fixedly connected to the mounting frame (64) on the same side.

4. The defect detection device for polyimide film production according to claim 1, characterized in that: The bottom side of the base A (1) is rotatably connected to the base B (2), and the base B (2) has an installation port (23), and a fixed seat (24) is rotatably connected inside the installation port (23).

5. The defect detection device for polyimide film production according to claim 4, characterized in that: The host (4) is slidably connected inside the fixed base (24). The host (4) is connected to the main detection head (41) and the auxiliary detection head (42) respectively via data cables. The host (4) is equipped with a display screen and control buttons respectively.

6. The defect detection device for polyimide film production according to claim 4, characterized in that: An arc-shaped limiting groove B (21) is provided on one side of the base B (2). A limiting rod (22) is rotatably connected to the side of the base B (2) near the limiting groove B (21). A slider is fixedly connected to the limiting rod (22). The slider on the limiting rod (22) is located in the limiting groove B (21) and is slidably connected to it.

7. A defect detection device for polyimide film production according to claim 6, characterized in that: The base A (1) has an arc-shaped limiting groove A (11) on the side near the limiting groove B (21). The limiting groove A (11) and the limiting groove B (21) are connected to each other. The center of the arc of the limiting groove A (11) and the limiting groove B (21) are aligned with the rotation axis of the limiting rod (22).

8. The defect detection device for polyimide film production according to claim 1, characterized in that: The inner top wall of the fixing port (31) is provided with an installation groove (32), and a rubber pad (34) is slidably connected in the installation groove (32). A screw (33) is threadedly connected to the top of the clamp (3). The bottom end of the screw (33) is fixedly connected to the rubber pad (34), and a knob (35) is fixedly connected to the top end of the screw (33).

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