A device and method for detecting peeling of a polyethylene film in a carbon fiber prepreg

Abstract

This invention relates to the field of detection device technology, and discloses a device and method for detecting the peeling of polyethylene film in carbon fiber prepreg. The device includes a roller conveyor, a blue light detection component fixedly installed above the middle of the roller conveyor, a peeling platform located on the front right side of the roller conveyor, a flipping transfer component between the peeling platform and the roller conveyor, a negative pressure adsorption component connected to the left side of the flipping transfer component, a piston drive component located to the right side of the negative pressure adsorption component, a squeezing fixing component located in front of the peeling platform, and a peeling assembly penetrating through the left end of the peeling platform. When the carbon fiber prepreg passes under an arched frame, a blue light lamp illuminates the carbon fiber prepreg. The surface of the carbon fiber prepreg after the polyethylene film has been peeled off diffusely reflects the blue light, while the unpeeled polyethylene film reflects the blue light. A CCD camera is used to photograph the surface of the carbon fiber prepreg to detect whether there are reflective areas; thus achieving a simple and convenient detection process.

Description

Technical Field

[0001] This invention relates to the field of detection device technology, specifically to a device and method for detecting the peeling of polyethylene film in carbon fiber prepreg. Background Technology

[0002] The carbon fiber prepreg has release paper and release film bonded to both sides. The release paper is white, and the release film is a blue polyethylene film. The carbon fiber prepreg itself is black. When the carbon fiber prepregs are stacked and extruded together, the release film needs to be peeled off. However, some of the polyethylene film may not be completely removed and may become trapped between the carbon fiber prepregs, affecting the molding quality. Therefore, it is necessary to inspect the peeling condition of the polyethylene film on the carbon fiber prepregs.

[0003] Chinese Patent CN116577328A, filed on May 12, 2023, discloses a method and apparatus for detecting the peeling of polyethylene film from carbon fiber prepreg. The method includes: acquiring an image to be tested, including the polyethylene film; dividing the image into several regions to be tested; wherein adjacent regions overlap, and the area enclosed by all regions covers the area of ​​the polyethylene film; calculating the average pixel value of each region; and determining whether the polyethylene film in the carbon fiber prepreg has been completely peeled off based on the average pixel value of each region. This invention can determine whether the polyethylene film has been completely peeled off from the carbon fiber prepreg.

[0004] In this technical solution, the surface of the carbon fiber prepreg needs to be divided into sections, the pixel value of each region needs to be calculated, and the polyethylene film needs to be completely peeled off based on the average pixel value. The detection process is relatively complicated, and there is no subsequent processing structure for the carbon fiber prepreg that has not been completely peeled off from the polyethylene film, so further improvements can be made. Summary of the Invention

[0005] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a device and method for detecting the peeling of polyethylene film in carbon fiber prepreg. It has the advantages of simple and convenient detection process and peeling off residual polyethylene film, solving the problem that the detection process for whether polyethylene glass has been completely peeled off is relatively complicated and lacks a subsequent processing structure.

[0006] (II) Technical Solution To achieve a simple and convenient detection process and to remove residual polyethylene film, this invention provides the following technical solution: a device for detecting the peeling of polyethylene film in carbon fiber prepreg, comprising a roller conveyor, a blue light detection component fixedly installed above the middle of the roller conveyor, a peeling platform provided on the front right side of the roller conveyor, a flipping transfer component provided between the peeling platform and the roller conveyor, an array of clearance grooves on the front right side of the roller conveyor for avoiding the flipping transfer component; a negative pressure adsorption component connected to the left side of the flipping transfer component, a piston drive component provided on the right side of the negative pressure adsorption component, a squeezing fixing component provided on the front side of the peeling platform, and a peeling assembly penetrating through the left end of the peeling platform.

[0007] Preferably, the blue light detection device includes an arched frame fixedly installed on the top of the roller conveyor, a lamp holder fixedly installed on the inner top wall of the arched frame, blue lights arranged in an array at the bottom of the lamp holder, a light shield fixedly installed on the right side of the lamp holder, a support gimbal fixedly installed on the top of the arched frame, and a CCD camera fixedly installed on the right end of the support gimbal.

[0008] Preferably, the flipping and transferring component includes two supports, with a hollow shaft rotatably connected between the top ends of the two supports. Hollow support arms are fixedly arranged in an array on the circumferential surface of the hollow shaft. Adsorption holes are formed on the surface of the hollow support arms. A baffle plate is fixedly installed at one end of the adsorption hole near the hollow shaft. The hollow support arms are inserted into the clearance groove. A motor is fixedly installed on one of the supports. A sprocket is connected to the output end of the motor. A sprocket is connected to the right end of the hollow shaft. The sprocket and the sprocket are connected by a chain.

[0009] Preferably, an inclined guide plate is fixedly installed at the left end of the stripping table, an installation groove is provided through the top of the stripping table, and a through groove is provided through the top of the rear side of the stripping table to avoid the baffle plate.

[0010] Preferably, the negative pressure adsorption component includes a piston cylinder shell fixedly installed on the lower half of one of the supports. A hollow piston rod is slidably connected to the right end of the piston cylinder shell. A guide rod is fixedly installed on the other support, and the right end of the hollow piston rod is slidably connected to the guide rod. An air guide pipe is connected to the left end of the piston cylinder shell. A sealing cover is connected to the end of the air guide pipe away from the piston cylinder shell. An air inlet pipe is fixedly installed at the eccentric position of the left end of the sealing cover. An inner sleeve is fixedly installed at the left end of the hollow shaft. The sealing cover is sleeved on the outside of the inner sleeve and fixedly installed on the support. The air inlet pipe is attached to the left end of the inner sleeve. A through hole is opened at the eccentric position of the left end of the inner sleeve.

[0011] Preferably, the piston drive component includes a rotating cylinder fixedly installed at the center of a sprocket. The rotating cylinder has a spiral groove array on its circumferential surface. Both ends of the spiral groove are connected to an arc groove. The center of the arc groove coincides with the axis of the rotating cylinder. The rotating cylinder is rotatably connected inside a hollow piston rod. A sliding ball is fixed in an array on the inner wall of the right end of the hollow piston rod. The sliding ball is slidably connected in the spiral groove and the arc groove.

[0012] Preferably, the extrusion fixing component includes two supports two disposed on the front side of the stripping table, a drive shaft rotatably connected between the two supports two, a bushing disposed on the drive shaft, a deflection frame fixedly mounted on the circumferential surface of the bushing, a U-shaped pressure plate fixedly mounted on the deflection frame, the U-shaped pressure plate having a U-shaped cross-section; a transmission shaft is rotatably connected through one of the supports two, a sprocket three is fixedly mounted on the right end of the transmission shaft, a sprocket four is fixedly mounted on the right end of the drive shaft, the sprocket three and the sprocket four are connected by a chain two; a winding wheel one is fixedly mounted on the left end of the transmission shaft, a winding wheel two is connected to the right end of the drum, a wire rope is connected between the winding wheel two and the winding wheel one, and a coil spring is fixedly mounted between the transmission shaft and the support two.

[0013] Preferably, the peeling assembly includes a second motor fixedly installed at the bottom left end of the peeling table, the output end of the second motor is connected to a friction roller, the friction roller is rotatably connected through the mounting groove, and a scraper is provided below the friction roller.

[0014] Preferably, a first gear is fixedly installed at the front end of the friction roller, a second gear meshes below the first gear, a guide rail is provided below the drive shaft, a rack plate is slidably connected on the guide rail, the rack plate meshes with the bottom of the second gear, a connecting plate is fixedly installed at the top right end of the rack plate, a collar is fixedly installed at the top end of the connecting plate, the collar is rotatably connected to the bushing, the cross-section of the drive shaft is D-shaped, and the bushing is slidably connected to the drive shaft.

[0015] The method for detecting the peeling of polyethylene film in carbon fiber prepreg includes the following specific steps: S1. Place the carbon fiber prepreg to be tested sequentially on the roller conveyor, with the surface of the carbon fiber prepreg peeled off the polyethylene film facing upwards. When the carbon fiber prepreg passes under the arched frame, a blue light lamp shines blue light on the carbon fiber prepreg. The surface of the carbon fiber prepreg after peeling off the polyethylene film diffuses the blue light, while the unpeeled polyethylene film reflects the blue light. The surface of the carbon fiber prepreg is photographed by a CCD camera to detect whether there are reflective areas. S2. When the reflective carbon fiber prepreg passes over the hollow support arm, the roller conveyor stops conveying the carbon fiber prepreg. Then, the motor drives the sprocket to rotate. With the transmission action of sprocket one, sprocket two and chain one, the hollow shaft rotates 180°. The hollow support arm flips the carbon fiber prepreg and transfers it to the surface of the peeling table, so that the surface of the carbon fiber prepreg after peeling off the polyethylene film is placed face down on the peeling table. S3. When the sprocket rotates, it drives the rotating drum to rotate synchronously. The rotating drum is located on the inner wall of the spiral groove and squeezes the sliding ball, which drives the hollow piston rod to move to the right along the guide rod and makes the left half of the piston cylinder shell into a negative pressure state. With the connection of the air guide pipe, sealing cover, inner cylinder and through hole, the hollow shaft and hollow support arm are in a negative pressure state, so that the carbon fiber prepreg is adsorbed through the adsorption hole, and the prepreg slides relative to the hollow support arm during the deflection of the hollow support arm. S4. When the hollow shaft and hollow support arm deflect to nearly 180°, the through hole connects with the air inlet pipe, and the inside of the hollow shaft connects with the outside. The adsorption hole no longer adsorbs the carbon fiber prepreg, allowing the carbon fiber prepreg to fall smoothly onto the top of the stripping table. S5. When the hollow shaft deflects to transfer the carbon fiber prepreg, the drum drives the second winding wheel to rotate, so that the wire rope is wound on the second winding wheel. During this process, the wire rope pulls the first winding wheel to rotate, and the coil spring twists to accumulate elastic potential energy. With the transmission action of the third sprocket, the fourth sprocket and the second chain, the drive shaft and bushing deflect, the deflection frame and the U-shaped pressure plate deflect forward, and avoid the hollow support arm and the carbon fiber prepreg. S6. When the hollow shaft driven by motor one deflects backward to reset, the winding wheel two releases the wire rope. Under the elastic action of the coil spring, the drive shaft, bushing and deflection frame deflect backward, the winding wheel one winds up the wire rope, and the U-shaped pressure plate presses on the carbon fiber prepreg. S7. The friction roller is driven to rotate by motor 2, and gear 1 drives gear 2 to rotate, which drives the rack plate, connecting plate, collar and bushing to move to the left. The U-shaped pressure plate presses on the carbon fiber prepreg and moves to the left, so that the carbon fiber prepreg passes over the friction roller, and the residual polyethylene film on the carbon fiber prepreg sticks to the friction roller. After that, the carbon fiber prepreg moves along the inclined guide plate to the left side of the peeling table.

[0016] (III) Beneficial Effects Compared with the prior art, the present invention provides a device and method for detecting the peeling of polyethylene film in carbon fiber prepreg, which has the following beneficial effects: 1. The device for detecting the peeling of polyethylene film in carbon fiber prepreg involves a blue light lamp illuminating the carbon fiber prepreg as it passes under an arched frame. The surface of the carbon fiber prepreg after the polyethylene film is peeled off diffusely reflects the blue light, while the unpeeled polyethylene film reflects the blue light. The surface of the carbon fiber prepreg is then photographed by a CCD camera to detect any reflective areas, thus achieving a simple and convenient detection process. 2. The device for detecting the peeling of polyethylene film in the carbon fiber prepreg is driven by a second motor to rotate a friction roller. A first gear drives a second gear to rotate, which in turn moves the rack, connecting plate, collar, and bushing to the left. The U-shaped pressure plate presses against the carbon fiber prepreg and moves to the left, causing the carbon fiber prepreg to pass over the friction roller. This causes the residual polyethylene film on the carbon fiber prepreg to stick to the friction roller. Afterward, the carbon fiber prepreg moves along the inclined guide plate to the left side of the peeling table, thereby achieving the purpose of automatically peeling off the residual polyethylene film. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a device for detecting the peeling of polyethylene film in carbon fiber prepreg proposed in this invention. Figure 2 This is a schematic diagram of the structure of the flipping and transferring component and the extrusion fixing component after deflection in the peel detection device for polyethylene film in carbon fiber prepreg proposed in this invention. Figure 3 This is a schematic diagram of the blue light detection element structure of a peel detection device for polyethylene film in carbon fiber prepreg proposed in this invention; Figure 4 This is a three-dimensional structural diagram of the flipping and transferring component of a peel detection device for polyethylene film in carbon fiber prepreg proposed in this invention. Figure 5 This is a three-dimensional structural diagram of the flipping and transfer component and the negative pressure adsorption component of the peel detection device for polyethylene film in carbon fiber prepreg proposed in this invention. Figure 6 This is a three-dimensional structural diagram of the flipping and transferring component, the negative pressure adsorption component, and the piston driving component of the peeling detection device for polyethylene film in carbon fiber prepreg proposed in this invention.

[0018] Figure 7 This is a three-dimensional structural diagram of the drive component of a peel detection device for polyethylene film in carbon fiber prepreg proposed in this invention. Figure 8 This is a three-dimensional structural diagram of the extrusion fixing component of a peel detection device for polyethylene film in carbon fiber prepreg proposed in this invention; Figure 9 This is a three-dimensional structural diagram of the peeling component of a peeling detection device for polyethylene film in carbon fiber prepreg proposed in this invention. Figure 10 This is a three-dimensional structural diagram of the extrusion fixing component and the peeling assembly of a peeling detection device for polyethylene film in carbon fiber prepreg proposed in this invention.

[0019] In the diagram: 100, roller conveyor; 200, blue light detection component; 300, peeling table; 400, flipping and transferring component; 500, negative pressure adsorption component; 600, piston drive component; 700, extrusion fixing component; 800, peeling assembly; 101. Clearance groove; 201. Arched frame; 202. Lamp holder; 203. Blue light lamp; 204. Light shield; 205. Support gimbal; 206. CCD camera; 301. Inclined guide plate; 302. Mounting groove; 303. Through groove; 401. Support 1; 402. Hollow shaft; 403. Hollow support arm; 404. Adsorption hole; 405. Baffle plate; 406. Motor 1; 407. Sprocket 1; 408. Sprocket 2; 409. Chain 1; 501. Piston barrel shell; 502. Hollow piston rod; 503. Guide rod; 504. Air guide tube; 505. Sealing cover; 506. Air inlet pipe; 507. Inner sleeve; 508. Through hole; 601. Rotary drum; 602. Spiral groove; 603. Arc groove; 604. Slipper ball; 701. Support 2; 702. Drive shaft; 703. Bushing; 704. Deflector frame; 705. U-shaped pressure plate; 706. Transmission shaft; 707. Sprocket 3; 708. Sprocket 4; 709. Chain 2; 710. Winding reel 1; 711. Winding reel 2; 712. Wire rope; 713. Coil spring; 801. Motor 2; 802. Friction roller; 803. Scraper; 804. Gear 1; 805. Gear 2; 806. Guide rail; 807. Rack plate; 808. Connecting plate; 809. Collar. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-2A peeling detection device for polyethylene film in carbon fiber prepreg includes a roller conveyor 100, a blue light detection component 200 fixedly installed above the middle of the roller conveyor 100, a peeling table 300 provided on the front right side of the roller conveyor 100, a flipping transfer component 400 provided between the peeling table 300 and the roller conveyor 100, and an array of clearance grooves 101 provided on the front right side of the roller conveyor 100 for avoiding the flipping transfer component 400; a negative pressure adsorption component 500 connected to the left side of the flipping transfer component 400, a piston drive component 600 provided on the right side of the negative pressure adsorption component 500, a squeezing fixing component 700 provided on the front side of the peeling table 300, and a peeling assembly 800 penetratingly provided on the upper left side of the peeling table 300.

[0022] Please see Figures 1-3 The blue light detection component 200 includes an arched frame 201 fixedly installed on the top of the roller conveyor 100. A lamp holder 202 is fixedly installed on the inner top wall of the arched frame 201. The bottom of the lamp holder 202 is inclined and tilted from left to right. Blue lights 203 are arranged in an array at the bottom of the lamp holder 202. The blue lights 203 irradiate blue light to the lower right. A light shield 204 is fixedly installed on the right side of the lamp holder 202. A support gimbal 205 is fixedly installed on the top of the arched frame 201. A CCD camera 206 is fixedly installed on the right end of the support gimbal 205.

[0023] The blue light emitted by the blue lamp 203 is blocked by the light shield 204, preventing it from directly shining on the lens of the CCD camera 206. When the blue light shines on the surface of the carbon fiber prepreg, the prepreg diffuses the light, resulting in a weaker reflected light intensity. Any remaining polyethylene film that has not been completely peeled off reflects the blue light, causing bright blue areas to appear on the surface of the prepreg. The presence of these bright blue areas on the surface of the prepreg by the CCD camera 206 indicates whether the polyethylene film has been completely peeled off; the detection process is simple and convenient.

[0024] Please see Figures 1-2 and Figure 4 The flipping and transferring component 400 includes two supports 401, with a hollow shaft 402 rotatably connected between the top ends of the two supports 401. Hollow support arms 403 are fixedly arranged in an array on the circumferential surface of the hollow shaft 402. Adsorption holes 404 are opened on the surface of the hollow support arms 403. A baffle plate 405 is fixedly installed at one end of the adsorption hole 404 near the hollow shaft 402. The hollow support arms 403 are inserted into the clearance groove 101. Multiple conveying rollers are arranged equidistantly inside the roller conveyor 100. When the hollow support arms 403 deflect into the clearance groove 101, each hollow support arm 403 is located between two adjacent conveying rollers, and the top of the hollow support arm 403 is lower than the top of the hollow support arm 403 to avoid the hollow support arms 403 blocking the carbon fiber prepreg.

[0025] A motor 406 is fixedly mounted on one of the supports 401. A sprocket 407 is connected to the output end of the motor 406. A sprocket 408 is connected to the right end of the hollow shaft 402. Sprockets 407 and 408 are connected by a chain 409. The motor 406 drives sprocket 407 to rotate, and in conjunction with the transmission action of sprockets 407, 408, and chain 409, the hollow shaft 402 rotates, which in turn causes the hollow support arm 403 to deflect, thus transferring the carbon fiber prepreg.

[0026] Please see Figures 1-2 and Figure 9 An inclined guide plate 301 is fixedly installed on the left end of the peeling table 300. An installation groove 302 is opened through the top of the peeling table 300. A through groove 303 is opened through the top array of the rear side of the peeling table 300. The through groove 303 is used to avoid the baffle plate 405.

[0027] Please see Figures 4-5 The negative pressure adsorption component 500 includes a piston cylinder shell 501 fixedly installed on the lower half of one of the supports 401. The axis of the piston cylinder shell 501 is parallel to the axis of the hollow shaft 402, and the piston cylinder shell 501 is located directly below the left half of the hollow shaft 402. A hollow piston rod 502 is slidably connected to the right end of the piston cylinder shell 501. A guide rod 503 is fixedly installed on the other support 401, and the right end of the hollow piston rod 502 is slidably connected to the guide rod 503. The hollow piston rod 502 is guided by the piston cylinder shell 501 and the guide rod 503 to prevent the hollow piston rod 502 from rotating during sliding inside the piston cylinder shell 501.

[0028] A guide pipe 504 is connected to the left end of the piston cylinder shell 501. A sealing cover 505 is connected to the end of the guide pipe 504 away from the piston cylinder shell 501. An intake pipe 506 is fixedly installed at the eccentric position of the left end of the sealing cover 505. An inner sleeve 507 is fixedly installed at the left end of the hollow shaft 402. The sealing cover 505 is sleeved on the outside of the inner sleeve 507 and fixedly installed on the support 401. The length of the sealing cover 505 is greater than the length of the through hole 508. A communicating cavity is formed between the outer wall of the through hole 508 and the inner wall of the sealing cover 505. The intake pipe 506 fits against the left end of the inner sleeve 507. A through hole 508 is opened through the eccentric position of the left end of the inner sleeve 507. Thus, the hollow shaft 402 communicates with the communicating cavity through the through hole 508. When the hollow support arm 403 is located inside the clearance groove 101, the through hole 508 and the intake pipe 506 are located on the front and rear sides of the axis of the sealing cover 505, respectively. When the hollow shaft 402 and the hollow support arm 403 are deflected by 180°, the through hole 508 is aligned with the intake pipe 506, so that the through hole 508 is connected to the outside.

[0029] Please see Figures 6-7The piston drive component 600 includes a rotating cylinder 601 fixedly mounted at the center of the sprocket 407. The rotating cylinder 601 is rotatably connected inside the hollow piston rod 502, and the diameter of the rotating cylinder 601 is equal to the inner diameter of the hollow piston rod 502. The rotating cylinder 601 has a spiral groove 602 arrayed on its circumferential surface. Both ends of the spiral groove 602 are connected to arc-shaped grooves 603. The center of the arc of the arc-shaped groove 603 coincides with the axis of the rotating cylinder 601. The central angle between the spiral groove 602 and the arc-shaped groove 603 on the circumferential surface of the spiral groove 602 is 180°. A sliding ball 604 is fixedly arrayed on the inner wall of the right end of the hollow piston rod 502, and the sliding ball 604 is slidably connected within the spiral groove 602 and the arc-shaped groove 603. The sprockets 408 and 407 have the same diameter, which makes the rotation speed of the hollow shaft 402 and the rotating drum 601 equal. Before and after the transfer of carbon fiber prepreg by the hollow shaft 402 and the hollow support arm 403, the sliding ball 604 is located in the arc groove 603 at both ends of the spiral groove 602.

[0030] Please see Figure 8 The extrusion fixing component 700 includes two supports 701 disposed on the front side of the peeling table 300. A drive shaft 702 is rotatably connected between the two supports 701. A bushing 703 is disposed on the drive shaft 702. A deflection frame 704 is fixedly mounted on the circumferential surface of the bushing 703. A U-shaped pressure plate 705 is fixedly mounted on the deflection frame 704. The U-shaped pressure plate 705 has a U-shaped cross-section. By rotating the drive shaft 702, the bushing 703 and the deflection frame 704 are driven to rotate. When the deflection frame 704 deflects above the peeling table 300, the U-shaped pressure plate 705 presses against the top of the carbon fiber prepreg on the top of the peeling table 300. This extrudes and positions the carbon fiber prepreg, preventing the carbon fiber prepreg from moving relative to the peeling assembly 800 when the peeling assembly 800 peels off the residual polyethylene film on the surface of the carbon fiber prepreg.

[0031] A drive shaft 706 is rotatably connected through one of the supports 701. A sprocket 707 is fixedly installed on the right end of the drive shaft 706, and a sprocket 708 is fixedly installed on the right end of the drive shaft 702. The sprockets 707 and 708 are connected by a chain 709. A winding wheel 710 is fixedly installed on the left end of the drive shaft 706, and a winding wheel 711 is connected to the right end of the drum 601. A wire rope 712 is connected between the winding wheel 711 and the winding wheel 710. A coil spring 713 is fixedly installed between the drive shaft 706 and the support 701.

[0032] The elasticity of the coil spring 713 causes the first winding wheel 710 to tend to wind up the wire rope 712. When the drum 601 rotates, the second winding wheel 711 winds up the wire rope 712, while the first winding wheel 710 releases the wire rope 712; when the second winding wheel 711 releases the wire rope 712, the first winding wheel 710 winds it up. During this process, the second winding wheel 711 and the first winding wheel 710 rotate in the same direction. Combined with the transmission action of the third sprocket 707, the fourth sprocket 708, and the second chain 709, this causes the hollow shaft 402 and the drive shaft 702 to rotate in the same direction.

[0033] That is, when the hollow support arm 403 deflects forward, the deflection frame 704 deflects forward simultaneously to avoid the deflection frame 704 blocking the hollow support arm 403.

[0034] Please see Figures 9-10 The peeling assembly 800 includes a second motor 801 fixedly installed at the bottom left end of the peeling table 300. A friction roller 802 is connected to the output end of the second motor 801. The friction roller 802 is rotatably connected within the mounting groove 302. The surface of the friction roller 802 is adhesive. When the carbon fiber prepreg passes over the top of the friction roller 802, the friction roller 802 removes any residual polyethylene film from the carbon fiber prepreg. A scraper 803 is provided below the friction roller 802. A gap is reserved between the top of the scraper 803 and the circumferential surface of the friction roller 802 to prevent the scraper 803 from scraping off any adhesive or other substances from the friction roller 802.

[0035] In addition, the surface of the friction roller 802 may not be sticky. The friction roller 802 is made of rubber to increase the friction between the friction roller 802 and the polyethylene film. Through friction, the residual polyethylene film on the carbon fiber prepreg is removed.

[0036] A gear 804 is fixedly mounted at the front end of the friction roller 802. A gear 805 meshes below the gear 804. A guide rail 806 is provided below the drive shaft 702. A rack plate 807 is slidably connected to the guide rail 806, and the rack plate 807 meshes with the bottom of the gear 805. A connecting plate 808 is fixedly mounted on the top right end of the rack plate 807. A collar 809 is fixedly mounted on the top of the connecting plate 808. The collar 809 is rotatably connected to the bushing 703. The diameter of the gear 804 is smaller than the diameter of the gear 805. After the friction roller 802 rotates a certain number of times, the gear 805 rotates one revolution. That is, after the friction roller 802 rotates a certain number of times, the carbon fiber prepreg moves a relatively short distance relative to the friction roller 802, ensuring the contact time between the carbon fiber prepreg and the friction roller 802. The drive shaft 702 has a D-shaped cross-section, and the bushing 703 is slidably connected to the drive shaft 702. When the drive shaft 702 rotates, it can drive the bushing 703 to rotate, and during this process, the bushing 703 can slide relative to the drive shaft 702.

[0037] The method for detecting the peeling of polyethylene film in carbon fiber prepreg includes the following specific steps: S1. Place the carbon fiber prepreg to be tested sequentially on the roller conveyor 100 with the surface of the carbon fiber prepreg with the polyethylene film peeled off facing upwards. When the carbon fiber prepreg passes under the arched frame 201, the blue light lamp 203 irradiates the carbon fiber prepreg with blue light. The surface of the carbon fiber prepreg after the polyethylene film is peeled off diffusely reflects the blue light, while the unpeeled polyethylene film reflects the blue light. The surface of the carbon fiber prepreg is photographed by the CCD camera 206 to detect whether there are reflective areas. S2. When the reflective carbon fiber prepreg passes over the hollow support arm 403, the roller conveyor 100 stops conveying the carbon fiber prepreg. Then, the motor 406 drives the sprocket 407 to rotate. With the transmission action of the sprocket 407, the sprocket 408 and the chain 409, the hollow shaft 402 rotates 180°. The hollow support arm 403 flips the carbon fiber prepreg and transfers it to the surface of the peeling table 300, so that the surface of the carbon fiber prepreg after peeling off the polyethylene film is placed face down on the peeling table 300. S3. When the sprocket 407 rotates, it drives the rotating drum 601 to rotate synchronously. The rotating drum 601 is located on the inner wall of the spiral groove 602 and squeezes the sliding ball 604, which drives the hollow piston rod 502 to move to the right along the guide rod 503. This causes the left half of the piston cylinder shell 501 to be in a negative pressure state. With the connection of the air guide pipe 504, the sealing cover 505, the inner tube 507 and the through hole 508, the hollow shaft 402 and the hollow support arm 403 are in a negative pressure state. This allows the carbon fiber prepreg to be adsorbed through the adsorption hole 404, preventing the prepreg from sliding relative to the hollow support arm 403 during the deflection of the hollow support arm 403. S4. When the hollow shaft 402 and the hollow support arm 403 deflect to nearly 180°, the through hole 508 connects with the air inlet pipe 506, the interior of the hollow shaft 402 connects with the outside, and the adsorption hole 404 no longer adsorbs the carbon fiber prepreg, so that the carbon fiber prepreg can fall smoothly onto the top of the stripping table 300. S5. When the hollow shaft 402 deflects to transfer the carbon fiber prepreg, the drum 601 drives the take-up wheel 711 to rotate, so that the wire rope 712 is wound on the take-up wheel 711. During this process, the wire rope 712 pulls the take-up wheel 710 to rotate, and the coil spring 713 twists to accumulate elastic potential energy. With the transmission action of the sprocket 707, sprocket 708 and chain 709, the drive shaft 702 and bushing 703 are deflected. The deflection frame 704 and U-shaped pressure plate 705 deflect forward to avoid the hollow support arm 403 and the carbon fiber prepreg. S6. When the motor 406 drives the hollow shaft 402 to deflect backward for reset, the take-up reel 711 releases the wire rope 712. Under the elastic action of the coil spring 713, the drive shaft 702, bushing 703 and deflection frame 704 deflect backward, the take-up reel 710 winds up the wire rope 712, and the U-shaped pressure plate 705 presses it onto the carbon fiber prepreg. S7. The friction roller 802 is driven to rotate by the motor 801. The gear 804 drives the gear 805 to rotate, which in turn drives the rack plate 807, the connecting plate 808, the collar 809 and the bushing 703 to move to the left. The U-shaped pressure plate 705 presses on the carbon fiber prepreg and moves to the left, so that the carbon fiber prepreg passes over the friction roller 802, and the residual polyethylene film on the carbon fiber prepreg sticks to the friction roller 802. After that, the carbon fiber prepreg moves along the inclined guide plate 301 to the left side of the peeling table 300.

[0038] 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 device for detecting the peeling of polyethylene film in carbon fiber prepreg, comprising a roller conveyor (100), characterized in that: A blue light detection device (200) is fixedly installed above the middle part of the roller conveyor (100). A stripping table (300) is provided on the front right side of the roller conveyor (100). A flipping transfer device (400) is provided between the stripping table (300) and the roller conveyor (100). A clearance groove (101) is arrayed on the front right side of the roller conveyor (100). The clearance groove (101) is used to avoid the flipping transfer device (400). The flipping transfer component (400) is connected to a negative pressure adsorption component (500) on the left side, and a piston drive component (600) is provided on the right side of the negative pressure adsorption component (500). A squeezing and fixing component (700) is provided on the front side of the peeling table (300), and a peeling assembly (800) is provided through the left end of the peeling table (300). The flipping and transferring component (400) includes two supports (401), with a hollow shaft (402) rotatably connected between the top ends of the two supports (401). Hollow support arms (403) are fixedly arranged on the circumferential surface of the hollow shaft (402). Adsorption holes (404) are opened on the surface of the hollow support arms (403). A baffle plate (405) is fixedly installed at one end of the adsorption hole (404) near the hollow shaft (402). The hollow support arms (403) are inserted into the clearance groove (101). A motor (406) is fixedly installed on one of the supports (401). A sprocket (407) is connected to the output end of the motor (406). A sprocket (408) is connected to the right end of the hollow shaft (402). The sprocket (407) and the sprocket (408) are connected by a chain (409). The negative pressure adsorption component (500) includes a piston cylinder shell (501) fixedly installed on the lower half of one of the supports (401). A hollow piston rod (502) is slidably connected to the right end of the piston cylinder shell (501). A guide rod (503) is fixedly installed on the other support (401). The right end of the hollow piston rod (502) is slidably connected to the guide rod (503). An air guide pipe (504) is connected to the left end of the piston cylinder shell (501). The air guide pipe (504) is located away from the piston cylinder shell (501). A sealing cover (505) is connected to one end of the piston cylinder shell (501). An air inlet pipe (506) is fixedly installed at the eccentric position of the left end of the sealing cover (505). An inner sleeve (507) is fixedly installed at the left end of the hollow shaft (402). The sealing cover (505) is sleeved on the outside of the inner sleeve (507) and fixedly installed on the support (401). The air inlet pipe (506) is attached to the left end of the inner sleeve (507). A through hole (508) is opened through the eccentric position of the left end of the inner sleeve (507). The piston drive component (600) includes a rotating cylinder (601) fixedly installed at the center of a sprocket (407). The rotating cylinder (601) has a spiral groove (602) arrayed on its circumferential surface. Both ends of the spiral groove (602) are connected to an arc groove (603). The center of the arc groove (603) coincides with the axis of the rotating cylinder (601). The rotating cylinder (601) is rotatably connected inside a hollow piston rod (502). A sliding ball (604) is fixedly arranged on the inner wall of the right end of the hollow piston rod (502). The sliding ball (604) is slidably connected in the spiral groove (602) and the arc groove (603).

2. The peel detection device for polyethylene film in carbon fiber prepreg according to claim 1, characterized in that: The blue light detection device (200) includes an arched frame (201) fixedly installed on the top of the roller conveyor (100). A lamp holder (202) is fixedly installed on the inner top wall of the arched frame (201). Blue lights (203) are arranged in an array at the bottom of the lamp holder (202). A light shield (204) is fixedly installed on the right side of the lamp holder (202). A support gimbal (205) is fixedly installed on the top of the arched frame (201). A CCD camera (206) is fixedly installed on the right end of the support gimbal (205).

3. The peel detection device for polyethylene film in carbon fiber prepreg according to claim 2, characterized in that: An inclined guide plate (301) is fixedly installed on the left end of the peeling table (300). An installation groove (302) is provided through the top of the peeling table (300). A through groove (303) is provided through the top of the rear side of the peeling table (300). The through groove (303) is used to avoid the baffle plate (405).

4. The peel detection device for polyethylene film in carbon fiber prepreg according to claim 3, characterized in that: The extrusion fixing component (700) includes two supports (701) disposed on the front side of the stripping table (300), and a drive shaft (702) is rotatably connected between the two supports (701). A bushing (703) is disposed on the drive shaft (702), and a deflection frame (704) is fixedly installed on the circumferential surface of the bushing (703). A U-shaped pressure plate (705) is fixedly installed on the deflection frame (704), and the U-shaped pressure plate (705) has a U-shaped cross-section. A drive shaft (706) is rotatably connected through one of the supports (701). A sprocket (707) is fixedly installed on the right end of the drive shaft (706). A sprocket (708) is fixedly installed on the right end of the drive shaft (702). The sprocket (707) and the sprocket (708) are connected by a chain (709). A take-up reel 1 (710) is fixedly installed on the left end of the drive shaft (706), and a take-up reel 2 (711) is connected to the right end of the drum (601). A wire rope (712) is connected between the take-up reel 2 (711) and the take-up reel 1 (710). A coil spring (713) is fixedly installed between the drive shaft (706) and the support 2 (701).

5. The peel detection device for polyethylene film in carbon fiber prepreg according to claim 4, characterized in that: The peeling assembly (800) includes a second motor (801) fixedly installed at the bottom left end of the peeling table (300). The output end of the second motor (801) is connected to a friction roller (802). The friction roller (802) is rotatably connected through the mounting groove (302). A scraper (803) is provided below the friction roller (802).

6. The peel detection device for polyethylene film in carbon fiber prepreg according to claim 5, characterized in that: Gear 1 (804) is fixedly installed at the front end of the friction roller (802). Gear 2 (805) meshes below gear 1 (804). A guide rail (806) is provided below the drive shaft (702). A rack plate (807) is slidably connected on the guide rail (806). The rack plate (807) meshes with the bottom of gear 2 (805). A connecting plate (808) is fixedly installed at the top right end of the rack plate (807). A collar (809) is fixedly installed at the top end of the connecting plate (808). The collar (809) is rotatably connected to the bushing (703). The cross-section of the drive shaft (702) is D-shaped. The bushing (703) is slidably connected to the drive shaft (702).

7. The peel detection device for polyethylene film in carbon fiber prepreg according to claim 6, characterized in that, The method for detecting the peeling of polyethylene film in carbon fiber prepreg is as follows: S1. Place the carbon fiber prepreg to be tested on the roller conveyor (100) in sequence, with the surface of the carbon fiber prepreg peeled off the polyethylene film facing upward. When the carbon fiber prepreg passes under the arch frame (201), the blue light lamp (203) irradiates the carbon fiber prepreg with blue light. The surface of the carbon fiber prepreg after peeling off the polyethylene film diffuses the blue light, while the unpeeled polyethylene film reflects the blue light. The surface of the carbon fiber prepreg is photographed by the CCD camera (206) to detect whether there is a reflective area. S2. When the reflective carbon fiber prepreg passes over the hollow support arm (403), the roller conveyor (100) stops conveying the carbon fiber prepreg and then drives the sprocket (407) to rotate through the motor (406). With the transmission action of the sprocket (407), sprocket (408) and chain (409), the hollow shaft (402) rotates 180°. The hollow support arm (403) flips the carbon fiber prepreg and transfers it to the surface of the peeling table (300), so that the surface of the carbon fiber prepreg after peeling off the polyethylene film is placed face down on the peeling table (300). S3. When the sprocket (407) rotates, it drives the rotating drum (601) to rotate synchronously. The rotating drum (601) is located on the inner wall of the spiral groove (602) and squeezes the ball (604), which drives the hollow piston rod (502) to move to the right along the guide rod (503) and makes the left half of the piston cylinder shell (501) in a negative pressure state. With the connection of the air guide pipe (504), the sealing cover (505), the inner tube (507) and the through hole (508), the hollow shaft (402) and the hollow support arm (403) are in a negative pressure state, so that the carbon fiber prepreg is adsorbed through the adsorption hole (404) to avoid the prepreg sliding relative to the hollow support arm (403) during the deflection process. S4. When the hollow shaft (402) and hollow support arm (403) deflect to nearly 180°, the through hole (508) connects with the air inlet pipe (506), the interior of the hollow shaft (402) connects with the outside, and the adsorption hole (404) no longer adsorbs the carbon fiber prepreg, so that the carbon fiber prepreg can fall smoothly onto the top of the stripping table (300). S5. When the hollow shaft (402) deflects to transfer the carbon fiber prepreg, the drum (601) drives the take-up wheel two (711) to rotate, so that the wire rope (712) is wound on the take-up wheel two (711). During this process, the wire rope (712) pulls the take-up wheel one (710) to rotate, and the coil spring (713) twists to accumulate elastic potential energy. With the transmission action of the sprocket three (707), sprocket four (708) and chain two (709), the drive shaft (702) and bushing (703) deflect. The deflection frame (704) and U-shaped pressure plate (705) deflect forward to avoid the hollow support arm (403) and the carbon fiber prepreg. S6. When the motor (406) drives the hollow shaft (402) to deflect backward for reset, the take-up wheel (711) releases the wire rope (712). Under the elastic action of the coil spring (713), the drive shaft (702), bushing (703) and deflector (704) deflect backward, and the take-up wheel (710) winds up the wire rope (712). The U-shaped pressure plate (705) presses against the carbon fiber prepreg. S7. The friction roller (802) is driven to rotate by the motor (801), and the gear (804) drives the gear (805) to rotate, which drives the rack (807), connecting plate (808), collar (809) and bushing (703) to move to the left. The U-shaped pressure plate (705) presses on the carbon fiber prepreg and moves to the left, so that the carbon fiber prepreg passes over the friction roller (802) and the residual polyethylene film on the carbon fiber prepreg sticks to the friction roller (802). After that, the carbon fiber prepreg moves along the inclined guide plate (301) to the left side of the peeling table (300).

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