Foil surface quality detection device for collecting and releasing formed foil

Abstract

The invention discloses a foil surface quality detection device for formed foil winding and unwinding, and relates to the technical field of formed foils, the foil surface quality detection device for formed foil winding and unwinding comprises a machine body, and further comprises a stretching device, a cleaning device and a collecting device, a motor is fixedly installed on the surface of the machine body, a detection mechanism is arranged on the surface of the machine body, and the stretching device and the cleaning device are arranged on the surface of the machine body. Wherein the stretching device comprises a first rotating shaft, a first belt, a second rotating shaft, a second belt, a functional frame, a sliding box, a center shaft, a protruding block, a fixing plate, a second telescopic elastic rod and an inclined block, and the first rotating shaft rotationally penetrates through the surface of a first vertical frame. According to the foil surface detection device, the gap between the foil surface and the detection equipment can be eliminated, the measurement error caused by the looseness of the foil surface is reduced, the consistency of the foil surface in the whole detection process is kept, and reliable detection data can be obtained.

Description

Technical Field

[0001] The invention relates to the technical field of chemically formed foils, in particular to a foil surface quality detection device for collecting and releasing chemically formed foils. Background Art

[0002] Formed foil refers to foil that has undergone electrochemical treatment during the battery manufacturing process, and is usually used as the anode or cathode of the battery; foil winding refers to rolling the finished foil into a roll; and foil unwinding refers to releasing the rolled foil for subsequent processing.

[0003] The patent with the patent announcement number CN212134465U relates to a foil surface quality detection device for collecting and releasing chemical foil, including an inlet, a base, a support frame and a storage shaft, a detection box is arranged on one side of the top of the base, a detection lamp is arranged on the top of the detection box, a tensioning structure is arranged on the bottom of the detection box, an inlet is penetrated through the outer wall of one side of the detection box, an outlet is penetrated through the outer wall of the other side of the detection box, a dust removal mechanism is arranged on one side of the detection box, a support frame is arranged on one side of the top of the base, and a storage shaft is arranged at the middle position of the support frame. The patent is provided with a positioning structure, and the telescopic force of the second spring is used to drive the positioning block to move up and down, so as to play a certain positioning role on the stored chemical foil. At the same time, the damping block fixed at the bottom of the positioning block has a certain elasticity, so that the positioning effect is better.

[0004] In the above patent, a positioning structure is provided, and the expansion and contraction force of the second spring is used to drive the positioning block to move up and down, thereby playing a certain positioning role for the stored chemical foil. However, in the process of controlling the tension of the chemical foil, instantaneous excessive pressure may occur, which may lead to the rupture of the chemical foil. Therefore, a foil surface quality detection device for collecting and releasing chemical foil with the effect of alleviating the tension control of the chemical foil is designed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a foil surface quality detection device for forming foil collection and discharge, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a foil surface quality detection device for forming foil collection and release.

[0007] According to the above technical solution, the machine body also includes a stretching device, a motor is fixedly installed on the surface of the machine body, a detection mechanism is arranged on the surface of the machine body, a stand frame 1 is fixedly installed on the top of the machine body, a stand frame 2 is fixedly installed on the top of the machine body, the stretching device includes a rotating shaft 1, a belt 1, a rotating shaft 2, a belt 2, a functional frame, a sliding box, a central shaft, a convex block, a fixed plate, a telescopic elastic rod 2 and an inclined block, the rotating shaft 1 rotates and passes through the surface of the stand frame 1, the output end of the motor is connected to the end of the rotating shaft 1 close to the motor through a belt 1 transmission, and the rotating shaft 2 rotates and passes through the stand frame 2 The surface of the machine body, the rotating shaft 1 and the rotating shaft 2 are connected by belt 2 transmission, the functional frame is fixedly mounted on the top of the machine body, the surface of the machine body is provided with a slide groove 1, the sliding box is slidably mounted on the inner wall of the slide groove 1, the central axis rotates and penetrates the sliding box, the convex block is fixedly mounted on the surface of the sliding box, the fixed plate is fixedly mounted on the surface of the functional frame, the telescopic elastic rod 2 is fixedly mounted on the surface of the fixed plate, and the inclined block is fixedly mounted on the free end of the telescopic elastic rod 2. By pressing the formed foil, the gap between the foil surface and the detection equipment can be eliminated, thereby reducing the measurement error caused by the looseness of the foil surface.

[0008] According to the above technical solution, a telescopic elastic rod is fixedly installed on the top of the inner wall of the slide groove, and the sliding box is fixedly installed on the free end of the telescopic elastic rod, thereby reducing the measurement error caused by the looseness of the foil surface and maintaining the consistency of the foil surface during the entire detection process.

[0009] According to the above technical solution, the surface of the convex block is set as arc surface one, and the surface of the inclined block is set as arc surface two, which is helpful to obtain reliable detection data, especially in the detection of surface defects, thickness uniformity, etc.

[0010] According to the above technical scheme, it also includes a cleaning device and a collecting device, the cleaning device includes a fixed rod, a scraper, a placement plate, a sliding plate and an arc plate, the fixed rod is fixedly installed on the surface of the sliding box, the scraper is fixedly installed on the circumferential surface of the fixed rod, the placement plate is fixedly installed on the surface of the functional frame, the sliding plate is slidably installed on the surface of the functional frame, and the arc plate is fixedly installed on the top of the sliding plate to keep the chemical foil tidy during transportation, and the scraper can effectively remove dust and impurities on the foil surface to ensure that the detection instrument can accurately contact the foil surface.

[0011] According to the above technical solution, a telescopic elastic rod three is fixedly installed under the placement plate, the sliding plate is fixedly installed on the free end of the telescopic elastic rod three, the scraper is elastic, and the clean surface can improve the consistency of the detection data.

[0012] According to the above technical solution, a leakage groove is opened on the surface of the sliding plate, and the surface of the scraper is set to be a three-cambered surface, which ensures the reliability of each detection result and reduces the measurement error caused by contamination.

[0013] According to the above technical scheme, the collecting device includes a fixed frame, a reciprocating screw, a belt three, a scraper rod, a limit plate, a waste box and a waste drawer. The fixed frame is fixedly installed on the top of the sliding box, the reciprocating screw rod rotates and passes through the fixed frame, the central axis and the reciprocating screw rod are connected by a belt three transmission, the scraper rod is slidably installed on the circumferential surface of the reciprocating screw rod, the limit plate is fixedly installed on the surface of the scraper, the waste box is fixedly installed on the surface of the machine body, and the waste drawer is slidably installed inside the waste box. By regularly cleaning the dust and impurities on the scraper, it is ensured that the scraper always maintains a good working condition and improves its cleaning effect.

[0014] According to the above technical solution, the scraper rod is connected to the reciprocating screw rod through threads, and the surface of the scraper rod is set to be an arc surface 4, which avoids excessive accumulation of foreign matter such as dust and thus affects the work of the scraper 72 and the effect achieved.

[0015] The present invention provides a foil surface quality detection device for forming foil collection and discharge. It has the following beneficial effects: (1) The motor is started, and the motor output end rotates to drive belt 1 to rotate. The rotation of belt 1 drives shaft 1 to rotate. The rotation of shaft 1 drives the formed foil to move in the direction of shaft 2. When the telescopic spring rod 1 is restored to contact and squeeze the sliding box to move downward, the movement of the sliding box drives the central axis to move. At the same time, the telescopic spring rod 1 can move according to the tightness of the formed foil, so that the formed foil is always kept at its appropriate tightness. By pressing the formed foil, the gap between the foil surface and the detection equipment can be eliminated, the measurement error caused by the loose foil surface can be reduced, and the consistency of the foil surface can be maintained during the entire detection process, which is helpful to obtain reliable detection data.

[0016] (2) During the transportation of the chemical foil, the scraper will scrape off the dust or impurities attached to the top surface of the chemical foil. At this time, at the bottom of the chemical foil, the telescopic elastic rod three will always fit the bottom surface of the chemical foil according to the tightness of the chemical foil. At the same time, the movement of the telescopic elastic rod three drives the sliding plate to move. When the sliding plate moves, it drives the arc plate to move. During the transportation of the chemical foil, the arc plate will scrape off the dust or impurities attached to the bottom surface of the chemical foil, keeping the chemical foil clean during transportation. The scraper can effectively remove dust and impurities on the foil surface, ensuring that the detection instrument can accurately contact the foil surface. The clean surface can improve the consistency of the detection data.

[0017] (3) When the chemical foil is pressed by the central shaft, the scraper will rotate according to the pressing angle of the chemical foil. The rotation of the scraper drives the fixed rod to rotate. During the transportation of the chemical foil, the scraper will scrape off the dust or impurities attached to the top surface of the chemical foil. At the same time, the chemical foil will drive the central shaft to rotate during the transportation process. The central shaft rotates the belt three times. Driven by the reciprocating screw, the scraper rod slides in the opposite direction to scrape off the dust and impurities accumulated on its surface from the scraper, avoiding excessive accumulation of dust and other foreign matter, which will affect the work of the scraper and the effect achieved. By regularly cleaning the dust and impurities on the scraper, it is ensured that the scraper is always in good working condition and its cleaning effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall half-section structure of the present invention; Figure 3 It is a schematic diagram of the structure of the stretching device of the present invention; Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure in the middle; Figure 5 It is a schematic diagram of the structure of the cleaning device of the present invention; Figure 6 It is a partial structural schematic diagram of the collecting device of the present invention; Figure 7 This is a schematic diagram of the structure of the collecting device of the present invention; In the figure: 1, machine body; 2, motor; 3, detection mechanism; 4, stand one; 5, stand two; 61, shaft one; 62, belt one; 63, shaft two; 64, belt two; 65, function frame; 66, telescopic spring rod one; 67, sliding box; 68, center axis; 69, bump; 610, fixed plate; 611, telescopic spring rod two; 612, inclined block; 71, fixed rod; 72, scraper; 73, placement plate; 74, telescopic spring rod three; 75, sliding plate; 76, arc plate; 81, fixed frame; 82, reciprocating screw rod; 83, belt three; 84, scraper; 85, limit plate; 86, waste box; 87, waste drawer. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 7An embodiment of the present invention is as follows: a foil surface quality detection device for forming foil collection and release comprises a body 1, a stretching device, a motor 2 is fixedly installed on the surface of the body 1, a detection mechanism 3 is arranged on the surface of the body 1, a stand 4 is fixedly installed on the top of the body 1, a stand 2 5 is fixedly installed on the top of the body 1, the stretching device comprises a rotating shaft 1 61, a belt 1 62, a rotating shaft 2 63, a belt 2 64, a functional frame 65, a sliding box 67, a central shaft 68, a convex block 69, a fixed plate 610, a telescopic elastic rod 2 611 and an inclined block 612, the rotating shaft 1 61 rotates and penetrates the surface of the stand 1 4, the output end of the motor 2 is connected to the end of the rotating shaft 1 61 close to the motor 2 through the belt 1 62, the rotating shaft 2 63 rotates and penetrates the surface of the stand 2 5, the rotating shaft 1 61 The functional frame 65 is connected to the rotating shaft 63 through the belt 64, and the functional frame 65 is fixedly installed on the top of the body 1. A slide groove 1 is opened on the surface of the body 1. The sliding box 67 is slidably installed on the inner wall of the slide groove 1. The central shaft 68 rotates and passes through the sliding box 67. The protrusion 69 is fixedly installed on the surface of the sliding box 67. The fixed plate 610 is fixedly installed on the surface of the functional frame 65. The telescopic elastic rod 2 611 is fixedly installed on the surface of the fixed plate 610. The inclined block 612 is fixedly installed on the free end of the telescopic elastic rod 2 611. The rotation of the rotating shaft 1 61 drives the chemical foil to move in the direction of the rotating shaft 2 63. When the telescopic elastic rod 1 66 is restored to contact and squeeze the sliding box 67 to move downward, the movement of the sliding box 67 drives the central shaft 68 to move. At the same time, the downward movement of the central shaft 68 presses the loose chemical foil downward.

[0021] A telescopic elastic rod 66 is fixedly installed on the top of the inner wall of the slide groove 1, and the sliding box 67 is fixedly installed on the free end of the telescopic elastic rod 66. The rotation of the belt 2 64 drives the rotation shaft 2 63 to rotate. The rotation of the rotation shaft 2 63 tightens the formed foil. At the same time, the telescopic elastic rod 66 can move according to the tightness of the formed foil.

[0022] The surface of the protrusion 69 is set as arc surface 1, and the surface of the inclined block 612 is set as arc surface 2. When the inclined block 612 moves to contact and squeeze the telescopic elastic rod 2 611 to move, when the protrusion 69 is no longer in contact with the inclined block 612, the inclined block 612 is reset under the action of the telescopic elastic rod 2 611.

[0023] When the present embodiment is working: the motor 2 is started, the output end of the motor 2 rotates to drive the belt 1 62 to rotate, the belt 1 62 rotates to drive the shaft 1 61 to rotate, the shaft 1 61 rotates to drive the formed foil to move in the direction of the shaft 2 63 and reel the formed foil, and the integrity thereof is detected under the action of the detection mechanism 3. When the tension on the formed foil increases during the reeling process, the central shaft 68 moves upward under the action of the formed foil, the central shaft 68 moves upward to drive the sliding box 67 to move upward, the sliding box 67 moves upward to squeeze the telescopic elastic rod 1 66 to contract, so that the formed foil is always kept at its appropriate tightness, avoiding wrinkles caused by the surface of the formed foil being too loose, thereby causing inaccurate detection results, reducing measurement errors caused by loose foil surface, and maintaining consistency of the foil surface during the entire detection process, which is helpful to obtain reliable detection data, especially in terms of surface For the detection of surface defects, thickness uniformity, etc., the movement of the sliding box 67 drives the protrusion 69 to move, and then the protrusion 69 contacts and squeezes the inclined block 612 to move, slowing down the movement speed of the sliding box 67. At the same time, when the inclined block 612 moves, contacts and squeezes the telescopic elastic rod 611 to move, when the protrusion 69 is no longer in contact with the inclined block 612, the inclined block 612 is reset under the action of the telescopic elastic rod 611. If the movement amplitude of the sliding box 67 is too large, the chemical foil is prevented from being in a shaking state all the time, and the stability of the chemical foil during the detection process is maintained, and the chemical foil is prevented from being permanently deformed or even broken when the tension changes too much, affecting its physical properties and structural integrity. At the same time, long-term high pressure may cause material fatigue, accelerate the aging of the chemical foil, and reduce its service life. In addition, excessive pressing force may cause the sensor to be unable to accurately reflect the true state of the foil surface during detection, resulting in data deviation.

[0024] See also Figure 1-Figure 7 On the basis of the above embodiment, another embodiment of the present invention further includes a cleaning device and a collecting device, the cleaning device includes a fixed rod 71, a scraper 72, a placement plate 73, a sliding plate 75 and an arc plate 76, the fixed rod 71 is fixedly mounted on the surface of the sliding box 67, the scraper 72 is fixedly mounted on the circumferential surface of the fixed rod 71, the placement plate 73 is fixedly mounted on the surface of the functional frame 65, the sliding plate 75 is slidably mounted on the surface of the functional frame 65, and the arc plate 76 is fixedly mounted on the top of the sliding plate 75. When the sliding plate 75 moves, it drives the arc plate 76 to move. The arc plate 76 scrapes off dust or impurities attached to the bottom surface of the formed foil during the transportation of the formed foil.

[0025] A telescopic spring rod 3 74 is fixedly installed below the placement plate 73, and a sliding plate 75 is fixedly installed at the free end of the telescopic spring rod 3 74. The scraper 72 is elastic, and the telescopic spring rod 3 74 will always fit the bottom surface thereof according to the tightness of the formed foil. At the same time, the movement of the telescopic spring rod 3 74 drives the sliding plate 75 to move.

[0026] The surface of the sliding plate 75 is provided with a leakage groove, and the surface of the scraper 72 is set as an arc surface three. The movement of the telescopic elastic rod three 74 drives the sliding plate 75 to move, and when the sliding plate 75 moves, it drives the arc plate 76 to move.

[0027] The collecting device includes a fixed frame 81, a reciprocating screw 82, a belt three 83, a scraper rod 84, a limit plate 85, a waste box 86 and a waste drawer 87. The fixed frame 81 is fixedly installed on the top of the sliding box 67, the reciprocating screw 82 rotates and passes through the fixed frame 81, the central shaft 68 and the reciprocating screw 82 are connected by the belt three 83, the scraper rod 84 is slidably installed on the circumferential surface of the reciprocating screw 82, the limit plate 85 is fixedly installed on the surface of the scraper plate 72, the waste box 86 is fixedly installed on the surface of the body 1, and the waste drawer 87 is slidably installed inside the waste box 86. The reciprocating screw 82 and the scraper rod 84 are connected by a threaded connection. The rotation of the reciprocating screw 82 drives the scraper rod 84 to slide. When the scraper rod 84 approaches and contacts the limit plate 85, the scraper rod 84 slides in the opposite direction driven by the reciprocating screw 82.

[0028] The scraper rod 84 is connected to the reciprocating screw rod 82 by threads. The surface of the scraper rod 84 is set as an arc surface 4. Driven by the reciprocating screw rod 82, the scraper rod 84 slides in the opposite direction to the scraper plate 72 to scrape off the dust and impurities accumulated on the surface of the scraper plate 72.

[0029] When the present embodiment is working, the sliding box 67 moves upward and drives the fixed rod 71 to move upward, and the fixed rod 71 moves upward and drives the scraper 72 to move upward. The upward movement of the scraper 72 can make it always fit with the surface of the formed foil. At this time, the scraper 72 scrapes off the dust or impurities attached to the top surface of the formed foil. At this time, at the bottom of the formed foil, the telescopic elastic rod 3 74 will always fit the bottom surface of the formed foil according to the tightness of the formed foil. At the same time, the movement of the telescopic elastic rod 3 74 drives the sliding plate 75 to move. When the sliding plate 75 moves, it drives the arc plate 76 to move. The arc plate 76 scrapes off the dust or impurities attached to the bottom surface of the formed foil during the transportation of the formed foil, so as to keep the formed foil clean during transportation. The scraper 72 can effectively remove the dust and impurities on the foil surface, so as to ensure that the detection instrument can accurately contact the foil surface. The clean surface can improve the consistency of the detection data, ensure the reliability of each detection result, and reduce the measurement error caused by pollution.

[0030] When the formed foil is pressed by the central shaft 68, the scraper 72 will rotate according to the angle of the formed foil pressing, and the rotation of the scraper 72 drives the fixed rod 71 to rotate. In the process of conveying the formed foil, the scraper 72 scrapes off the dust or impurities attached to the top surface of the formed foil. At the same time, the central shaft 68 is driven to rotate during the conveying of the formed foil, and the central shaft 68 rotates the belt three 83, and the belt three 83 drives the reciprocating screw rod 82 to rotate. The reciprocating screw rod 82 is connected to the scraper rod 84 through a threaded connection, and the reciprocating screw rod 82 rotates to drive the scraper rod 84 to slide. When the scraper rod 84 approaches and contacts the limit plate 85, the scraper rod 84 moves in the reciprocating screw. The scraper 72 is driven by the rod 82 to slide in the opposite direction, and the dust and impurities accumulated on the surface of the scraper 72 are scraped off from the scraper 72, avoiding excessive accumulation of dust and other foreign matter and thus affecting the work and effect of the scraper 72. When the dust is scraped off, it falls into the waste drawer 87. When the waste in the waste drawer 87 accumulates to a certain amount, the staff will pull the waste drawer 87 out of the waste box 86, and then after the waste in the waste drawer 87 is cleaned, it will be inserted back into the waste box 86. By regularly cleaning the dust and impurities on the scraper 72, it is ensured that the scraper 72 is always in good working condition and its cleaning effect is improved.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foil surface quality detection device for forming foil collection and discharge, comprising a body (1), characterized in that: It also includes a stretching device, a cleaning device and a collecting device; A motor (2) is fixedly mounted on the surface of the machine body (1), a detection mechanism (3) is arranged on the surface of the machine body (1), a stand 1 (4) is fixedly mounted on the top of the machine body (1), and a stand 2 (5) is fixedly mounted on the top of the machine body (1); The stretching device comprises a rotating shaft (61), a belt (62), a rotating shaft (63), a belt (64), a functional frame (65), a sliding box (67), a central shaft (68), a protrusion (69), a fixing plate (610), a telescopic elastic rod (611) and an inclined block (612); the rotating shaft (61) is rotatably connected to the surface of the vertical frame (4); the output end of the motor (2) is connected to the end of the rotating shaft (61) close to the motor (2) through the belt (62); the rotating shaft (63) is rotatably connected to the surface of the vertical frame (5); the rotating shaft (61) is connected to the rotating shaft (2) 63) is connected by a belt 2 (64), the functional frame (65) is fixedly mounted on the top of the machine body (1), a slide groove 1 is opened on the surface of the machine body (1), the sliding box (67) is slidably mounted on the inner wall of the slide groove 1, the central axis (68) rotates and penetrates the sliding box (67), the protrusion (69) is fixedly mounted on the surface of the sliding box (67), the fixing plate (610) is fixedly mounted on the surface of the functional frame (65), the telescopic elastic rod 2 (611) is fixedly mounted on the surface of the fixing plate (610), and the inclined block (612) is fixedly mounted on the free end of the telescopic elastic rod 2 (611).

2. The device for detecting the surface quality of formed foil for collecting and releasing foil according to claim 1, characterized in that: A telescopic elastic rod (66) is fixedly mounted on the top of the inner wall of the slide groove (6), and the sliding box (67) is fixedly mounted on the free end of the telescopic elastic rod (66).

3. The device for detecting the surface quality of formed foil for collecting and releasing foil according to claim 2, characterized in that: The surface of the protruding block (69) is configured as arc surface one, and the surface of the inclined block (612) is configured as arc surface two.

4. The device for detecting the surface quality of formed foil for collecting and releasing foil according to claim 3, characterized in that: The cleaning device comprises a fixed rod (71), a scraper (72), a placement plate (73), a sliding plate (75) and an arc plate (76), wherein the fixed rod (71) is fixedly mounted on the surface of the sliding box (67), the scraper (72) is fixedly mounted on the circumferential surface of the fixed rod (71), the placement plate (73) is fixedly mounted on the surface of the functional frame (65), the sliding plate (75) is slidably mounted on the surface of the functional frame (65), and the arc plate (76) is fixedly mounted on the top of the sliding plate (75).

5. The device for detecting the surface quality of formed foil for collecting and releasing foil according to claim 4, characterized in that: A telescopic spring rod three (74) is fixedly mounted below the placement plate (73), the sliding plate (75) is fixedly mounted on the free end of the telescopic spring rod three (74), and the scraper (72) is elastic.

6. The device for detecting the surface quality of formed foil for collecting and releasing foil according to claim 5, characterized in that: The surface of the sliding plate (75) is provided with a drain groove, and the surface of the scraper (72) is configured as a three-arc surface.

7. The device for detecting the surface quality of formed foil for collecting and releasing foil according to claim 6, characterized in that: The collecting device comprises a fixed frame (81), a reciprocating screw rod (82), a belt three (83), a scraper rod (84), a limit plate (85), a waste box (86) and a waste drawer (87), wherein the fixed frame (81) is fixedly mounted on the top of the sliding box (67), the reciprocating screw rod (82) rotates and passes through the fixed frame (81), the central shaft (68) and the reciprocating screw rod (82) are connected to each other through the belt three (83), the scraper rod (84) is slidably mounted on the circumferential surface of the reciprocating screw rod (82), the limit plate (85) is fixedly mounted on the surface of the scraper plate (72), the waste box (86) is fixedly mounted on the surface of the machine body (1), and the waste drawer (87) is slidably mounted inside the waste box (86).

8. The device for detecting the surface quality of formed foil for collecting and releasing foil according to claim 7, characterized in that: The scraper rod (84) is connected to the reciprocating screw rod (82) via threads, and the surface of the scraper rod (84) is configured as a curved surface.

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