Composite equipment for RFID antenna production

Abstract

The invention belongs to the technical field of RFID (radio frequency identification) antennas, in particular to compound equipment for RFID antenna production, and provides the following scheme that the compound equipment comprises a compound table, a press fitting piece and a hot pressing chamber are arranged on the compound table, the press fitting piece is provided with a horizontally placed fixing shaft, and the outer wall of the fixing shaft is rotationally connected with a press fitting block through a torsion spring; and a magnetic suction strip is embedded in the side, close to the hot pressing chamber, of the pressing block, and first electromagnetic blocks are installed at the two ends of the top of the composite table correspondingly. According to the invention, the intensity of downward deflection pressure applied by the pressing block can be more accurately adjusted by adjusting the magnitude of the current of the first electromagnetic block, so that the accuracy of antenna composite pressure control is ensured, and the composite operation effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of RFID antennas, and particularly relates to a composite device for producing RFID antennas. Background Art

[0002] An RFID antenna is a communication induction antenna, generally composed with a chip to form a complete RFID electronic tag transponder.

[0003] Referring to the Chinese patent with the publication number CN111370844A, it discloses a production device and manufacturing process for RFID ultra-high frequency antennas. The RFID ultra-high frequency antenna production device includes a PET film unwinding device, an aluminum foil unwinding device, a PET film surface gluing device, a PET film and aluminum foil composite device, a UV curing device, a hob die-cutting device, and a winding device. The aluminum foil on the aluminum foil unwinding device is introduced into the PET film and aluminum foil composite device, and the PET film on the PET film unwinding device is introduced into the PET film and aluminum foil composite device through the PET film surface gluing device. The composite film of the aluminum foil and the PET film sequentially passes through the UV curing device and the hob die-cutting device and then is wound through the winding device.

[0004] However, during the composite process of the PET film and the aluminum foil, the pressing depth or pressing force is often dynamically adjusted according to the actual situation. However, the composite structure of the conventional roller has a low adjustment accuracy, which will affect the composite effect. Summary of the Invention

[0005] Based on the technical problems in the background art, the present invention proposes a composite device for producing RFID antennas.

[0006] A composite device for producing RFID antennas proposed by the present invention includes a composite table, on which a pressing member and a hot pressing chamber are arranged. The pressing member is provided with a horizontally placed fixed shaft, and the outer wall of the fixed shaft is rotationally connected with a pressing block through a torsion spring. A magnetic attraction strip is embedded and installed on the side of the pressing block close to the hot pressing chamber. Electromagnetic blocks I are installed at both ends of the top of the composite table.

[0007] Preferably, the sides of the composite table and the pressing block away from the hot pressing chamber are both arranged as arc-shaped structures arched outwards. Two guide pieces I are installed on the side of the composite table away from the hot pressing chamber, and two guide pieces III are installed on the side of the pressing block away from the hot pressing chamber.

[0008] Preferably, two limiting mechanisms are arranged above the pressing member. The limiting mechanism includes a guiding frame, in which a slider is slidably limited. A limiting ball is connected to the bottom of the slider. A limiting groove is opened at the position corresponding to the limiting ball on the top of the pressing block. The depth of the limiting groove gradually decreases towards the direction close to the hot pressing chamber, and the outer wall of the bottom of the limiting ball is in sliding contact with the inner wall of the limiting groove.

[0009] Preferably, a first spring is connected between the slider and the inner wall of one side of the guiding frame. An electromagnetic block two is installed on the side of the guiding frame away from the first spring. After being energized, the electromagnetic block two and the slider are magnetically adsorbed to each other.

[0010] Preferably, a thickness detection module is arranged at the position between the pressing member and the hot pressing chamber on the composite table for obtaining the thickness of the film body after lamination in real time.

[0011] Preferably, a torsion monitoring module is arranged in the pressing block. The torsion monitoring module is used to obtain the torsion of the torsion spring in real time, upload the data monitored by the torsion monitoring module and the thickness detection module to the central processor for comprehensive analysis, and adjust the magnitude of the current supplied to the electromagnetic block one according to the analysis result.

[0012] Preferably, a rotatable hot pressing member is arranged in the hot pressing chamber. The hot pressing member is provided with a column. Four hot pressing rods are connected to the bottom end of the column, and adjacent two hot pressing rods are vertically arranged.

[0013] Preferably, a driving rod is rotatably connected to the top of the hot pressing chamber. The top end of the driving rod is drivingly connected to a motor. A sliding column with a rectangular cross section is installed at the bottom end of the driving rod. A sliding groove is formed at the top end of the column, and the outer wall of the sliding column is in sliding contact with the inner wall of the sliding groove. A fixing ring is installed on the outer wall of the driving rod, and a second spring is connected between the fixing ring and the column.

[0014] Preferably, a magnet is detachably connected to the bottom end of the sliding groove, and an electromagnetic block three is installed at the bottom end of the sliding column. After the electromagnetic block three is energized, it is magnetically repelled by the magnet.

[0015] Preferably, a tensile force monitoring module is arranged on the fixing ring. The tensile force monitoring module monitors the tensile force in the stretched state of the second spring in real time and uploads it to the central processor. The central processor comprehensively analyzes the tensile force monitoring module and the thickness detection module, and controls and adjusts the magnitude of the current supplied to the electromagnetic block three.

[0016] The beneficial effects of the present invention are as follows: 1. In the present invention, by adjusting the magnitude of the current supplied to the electromagnetic block one, the downward deflection pressure of the pressing block can be adjusted more precisely, so as to ensure the accuracy of the antenna composite pressure control and improve the composite operation effect. And through the adjustment setting that the pressing block deflects around the fixed axis, the initially laminated part is gradually pressed down, avoiding omission due to the mobility of the pressing block, and effectively avoiding jamming because the pressing block deflects and the downward pressing depth gradually increases in the film moving direction, thereby further improving the continuity and effectiveness of the lamination.

[0017] 2. In the present invention, the limiting ball is vertically limited by the slider in the guiding frame, so that most of the upward force applied to the composite film is offset, and only a small part will become the horizontal movement of the limiting ball, thereby effectively ensuring the effectiveness of the pressing, improving the limiting stability effect of the limiting structure on the movable pressing block, and enhancing the pressing effectiveness.

[0018] 3. In the present invention, the rotating hot pressing rod can assist in smoothing the composite film body, and the magnetic repulsive force between the third electromagnetic block and the magnet is adjusted by the magnitude of the current when the third electromagnetic block is energized, thereby adjusting the magnitude of the downward acting force of the hot pressing member and providing the accuracy of hot pressing adjustment.

[0019] 4. In the present invention, the data monitored by the torque monitoring module and the thickness detection module at the position of the torsion spring are uploaded to the central processing unit for comprehensive analysis, and the magnitude of the current for energizing the first electromagnetic block is adjusted according to the analysis result to improve the timeliness and accuracy of the pressure control of the pressing block.

[0020] 5. In the present invention, the monitoring data of the thickness detection module and the tension monitoring module at the position of the second spring are comprehensively analyzed, thereby controlling and adjusting the magnitude of the current when the third electromagnetic block is energized to realize the adjustment of the downward pressure of the hot pressing member, and improving the accuracy and effectiveness of the repair of the composite and the hot pressing control. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a composite device for producing RFID antennas proposed by the present invention; Figure 2 It is a schematic diagram of the distribution structure of the pressing member and the first electromagnetic block of a composite device for producing RFID antennas proposed by the present invention; Figure 3 It is a schematic diagram of the distribution structure of the first guide piece and the second guide piece of a composite device for producing RFID antennas proposed by the present invention; Figure 4 It is a schematic diagram of the structure of the pressing member of a composite device for producing RFID antennas proposed by the present invention; Figure 5 It is a schematic diagram of the structure of the limiting mechanism of a composite device for producing RFID antennas proposed by the present invention; Figure 6 It is a schematic diagram of the structure of the hot pressing chamber of a composite device for producing RFID antennas proposed by the present invention; Figure 7 It is a schematic diagram of the first use state of the hot pressing member of a composite device for producing RFID antennas proposed by the present invention; Figure 8 It is a schematic diagram of the second use state of the hot pressing member of a composite device for producing RFID antennas proposed by the present invention; Figure 9Schematic structural diagram of a hot pressing component of a composite device for RFID antenna production proposed by the present invention; Figure 10 Schematic internal structure diagram of a chute of a composite device for RFID antenna production proposed by the present invention.

[0022] In the figure: 1 first unwinding roller, 101 aluminum foil, 102 leveling roller, 2 second unwinding roller, 201 PET film, 3 coating roller, 301 carrier roller, 4 composite table, 401 mounting frame, 402 first electromagnetic block, 403 first guide piece, 404 second guide piece, 5 pressing component, 501 fixed shaft, 502 pressing block, 503 magnetic attraction strip, 504 third guide piece, 505 limiting groove, 6 hot pressing chamber, 7 limiting mechanism, 701 fixed frame, 702 guiding frame, 703 slider, 704 first spring, 705 extending rod, 706 limiting ball, 707 second electromagnetic block, 8 hot pressing component, 801 column, 802 hot pressing rod, 803 chute, 804 magnet, 9 driving rod, 901 sliding column, 902 third electromagnetic block, 903 fixed ring, 904 second spring, 10 motor, 11 thickness detection module. Specific implementation manners

[0023] Example 1: Refer to Figures 1 - 5, a composite device for manufacturing RFID antennas, comprising a composite table 4, on which a pressing member 5 and a hot pressing chamber 6 are arranged. At a position of the composite table 4 away from the hot pressing chamber 6, a first unwinding roller 1 and a second unwinding roller 2 are arranged. The first unwinding roller 1 is used for unwinding a copper foil 101, and the second unwinding roller 2 is used for unwinding a PET film 201. Between the first unwinding roller 1 and the composite table 4, a flattening roller 102 is arranged. The flattening roller 102 is used for flattening the copper foil 101 and guiding the copper foil 101 to the position of the composite table 4 through turning. Between the second unwinding roller 2 and the composite table 4, a glue coating roller 3 is arranged. The glue coating roller 3 is used for performing a glue coating operation on the side of the PET film 201 that will contact the copper foil 101. Below the glue coating roller 3, a carrier roller 301 is arranged, which is used for carrying the leaked glue and assisting in extruding the corresponding position of the PET film to perform glue coating. At positions corresponding to the pressing member 5 at both ends of the composite table 4, mounting frames 401 are fixed. The pressing member 5 is provided with a horizontally placed fixed shaft 501. Both ends of the fixed shaft 501 are fixedly connected to the two mounting frames 401 respectively. The outer wall of the fixed shaft 501 is rotationally connected with a pressing block 502 through a torsion spring. The pressing block 502 extends towards the side of the fixed shaft 501 close to the hot pressing chamber 6. A magnetic strip 503 is embedded on the side of the pressing block 502 close to the hot pressing chamber 6. The magnetic strip 503 is arranged parallel to the fixed shaft 501. Embedding grooves are opened at both ends of the top of the composite table 4, and an electromagnetic block 402 corresponding to the position of the magnetic strip 503 is installed in the embedding grooves. It should be noted that in the normal state, the bottom of the pressing block 502 can be in a horizontal state through the torsion force of the torsion spring; during use, the PET film 201 and the copper foil 101 are sent between the composite table 4 and the pressing member 5 for pressing operation. And during the long-term continuous pressing process, through the magnetic attraction operation between the two energized electromagnetic blocks 402 and both ends of the magnetic strip 503, the pressing block 502 deflects downward to assist in applying pressure: on the one hand, through adjusting the magnitude of the current when the electromagnetic block 402 is energized, the downward deflection pressure of the pressing block 502 can be adjusted more precisely, so as to ensure the accuracy of the antenna composite pressure control and improve the composite operation effect; on the other hand, through the adjustment setting of the deflection of the pressing block 502 around the fixed shaft 501, not only can the adjustment of the maximum pressure be realized, but also the maximum limit of the pressing distance can be achieved through the fixed state of the corresponding position between the pressing block 502 and the fixed shaft 501, that is, the PET film 201 and the copper foil 101 will first be preliminarily pressed at the corresponding position between the pressing block 502 and the fixed shaft 501 with a fixed pressing distance to ensure the upper limit of the restricted pressing, and then the pressing block 502 deflects to gradually press down the preliminarily pressed part, so as to ensure the pressing effect and avoid omission due to the mobility of the pressing block 502. And because the pressing block 502 deflects and the downward pressing depth gradually increases in the film moving direction, it effectively avoids jamming, thereby further improving the continuity and effectiveness of the composite operation.

[0024] In the present invention, the sides of the composite table 4 and the pressing block 502 away from the hot pressing chamber 6 are both provided with an arc-shaped structure that bulges outwards. The sides of the composite table 4 and the pressing block 502 away from the hot pressing chamber 6 are flush. Two first guide pieces 403 are installed on the side of the composite table 4 away from the hot pressing chamber 6, and the two first guide pieces 403 are distributed at both ends of the PET film 201. Two third guide pieces 504 are installed on the side of the pressing block 502 away from the hot pressing chamber 6, and the two third guide pieces 504 are distributed at both ends of the copper foil 101. Second guide pieces 404 are installed at the positions corresponding to the first guide pieces 403 on the top of the composite table 4, and the second guide pieces 404 are distributed at both ends of the composite film. Thus, during the continuous conveying composite operation process, the limiting function of the guide pieces is utilized to ensure the accuracy and anti-offset effect of the movement and feeding of the PET film 201, the copper foil 101, and the composite film, so as to ensure the composite operation effect.

[0025] In the present invention, two limiting mechanisms 7 are provided above the pressing member 5. The limiting mechanism 7 includes a guiding frame 702 that is vertically arranged perpendicular to the fixed shaft 501. The guiding frame 702 is horizontally placed, and a fixing frame 701 is fixed between the guiding frame 702 and the mounting frame 401. A slider 703 is limited and slides in the guiding frame 702. The bottom of the slider 703 is connected with an extension rod 705 that extends vertically downwards. A limiting ball 706 is installed at the bottom end of the extension rod 705. A limiting groove 505 is opened at the position corresponding to the limiting ball 706 on the top of the pressing block 502. The depth of the limiting groove 505 gradually decreases towards the direction close to the hot pressing chamber 6, and the outer wall of the bottom of the limiting ball 706 is in sliding contact with the inner wall of the limiting groove 505. By moving the limiting ball 706 towards the direction close to the hot pressing chamber 6 with the slider 703, the position limit of the upward deflection of the pressing block 502 can be adjusted. When the pressing block 502 is pressed down by the magnetic attraction between the first electromagnetic block 402 and the magnetic attraction strip 503, and when the composite film rebounds and applies a force upwards to the pressing block 502 due to the influence of the wrinkles of the copper foil 101 or the air cavity between the copper foil 101 and the PET film 201, on the one hand, the vertical limit can be carried out by using the limiting ball 706, and on the other hand, due to the vertical limit of the limiting ball 706 in the guiding frame 702 by the slider 703, most of the upward force applied by the composite film is offset, and only a small part will become the horizontal movement of the limiting ball 706. Thus, the effectiveness of the pressing can be effectively ensured, thereby improving the limiting stability effect of the limiting structure 7 on the movable pressing block 502 and improving the pressing effectiveness.

[0026] In the present invention, a first spring 704 is connected between the slider 703 and the inner wall of one side of the guide frame 702. An electromagnetic block two 707 is installed on the side of the guide frame 702 away from the first spring 704. After being energized, the electromagnetic block two 707 is magnetically adsorbed to the slider 703. The magnetic attraction difference between the energized electromagnetic block two 707 and the slider 703 is used to overcome the acting force of the first spring 704, thereby adjusting the position of the limit ball 706 in the limit groove 505. And the position of the limit ball 706 is accurately and timely adjusted by adjusting the magnitude of the current applied to the electromagnetic block two 707, so as to accurately adjust the position of the limit ball 706 when the pressing block 502 deflects and presses in different states.

[0027] Embodiment 2: Refer to Figures 1 - 10 , a composite device for producing RFID antennas. On the basis of Embodiment 1, a rotatable hot pressing member 8 is arranged in the hot pressing chamber 6. The hot pressing member 8 is provided with a column 801. Four hot pressing rods 802 are connected to the bottom end of the column 801. Adjacent two hot pressing rods 802 are vertically arranged. A heating component is arranged inside the hot pressing rods 802. The hot pressing rods 802 are made of heat-conducting materials, and the column 801 is made of heat-insulating materials; so as to perform hot pressing operations on the top of the composite film body through the rotating hot pressing rods 802 in the hot pressing chamber 6, and the composite film body can be assisted in flattening through the rotating hot pressing rods 802; It should be noted that, as Figure 7 shown: Two of the hot pressing rods 802 are arranged parallel to the moving direction of the composite film body, and the other two hot pressing rods 802 are arranged perpendicular to the moving direction of the film body. At this time, it is in the state where the covering width area of the hot pressing rods 802 is the largest; and as Figure 8 shown: The four hot pressing rods 802 form an X-shaped structure in the moving direction of the composite film body. At this time, the covering width area of the hot pressing rods 802 is the smallest; and in the state as Figure 8 shown, the hot pressing rods 802 can still completely cover the width direction range of the composite film body, so as to ensure the completeness of the hot pressing of the continuously conveyed composite film body by the rotating hot pressing member 8; and after the hot pressing member 8 rotates 180 degrees from the state as Figure 7 shown, one of the hot pressing rods 802 can move from one side of the composite film body to the other side for flattening, and then the hot pressing member 8 rotates 180 degrees in the reverse direction for hot pressing and flattening, thereby ensuring the completeness of the hot pressing and improving the hot pressing efficiency.

[0028] In the present invention, a driving rod 9 extending vertically downward is rotatably connected to the top of the hot pressing chamber 6 through a bearing. The top end of the driving rod 9 is drivingly connected to a motor 10. A sliding column 901 with a rectangular cross-section is installed at the bottom end of the driving rod 9. A sliding groove 803 is formed at the top end of the upright column 801. The outer wall of the sliding column 901 is in sliding contact with the inner wall of the sliding groove 803. A fixing ring 903 is installed on the outer wall of the driving rod 9 above the upright column 801. A second spring 904 is connected between the fixing ring 903 and the upright column 801. A magnet 804 is detachably connected to the bottom end of the sliding groove 803. An electromagnetic block three 902 is installed at the bottom end of the sliding column 901. After the electromagnetic block three 902 is energized, it is magnetically repulsive to the magnet 804. Thus, the magnetic repulsive force between the electromagnetic block three 902 and the magnet 804 is adjusted by the magnitude of the current passing through the electromagnetic block three 902 when it is energized, so as to adjust the acting force of the hot pressing member 8 when it presses downward, and provide the accuracy of hot pressing adjustment.

[0029] Embodiment 3: Refer to Figures 1 - 5 , a composite device for producing RFID antennas. On the basis of Embodiment 1, a thickness detection module 11 is arranged at the position between the pressing member 5 and the hot pressing chamber 6 on the composite table 4 for obtaining the thickness of the film body after lamination in real time; It should be noted that the thickness detection module can use a laser scanning thickness measurement system, which is provided with a laser emitter: emitting a laser beam to the strip-shaped RFID antenna. Generally, a line laser emitter is selected, which can form a laser line in the width direction of the antenna to obtain the thickness information in the width direction of the antenna; a laser receiver: receiving the laser signal reflected from the surface of the antenna and converting it into an electrical signal; a data processing unit: analyzing and processing the electrical signal transmitted by the laser receiver to calculate the thickness value of the antenna; working process: during the transportation of the strip-shaped RFID antenna, the laser beam emitted by the laser emitter irradiates the surface of the antenna. The laser is reflected on the upper and lower surfaces of the antenna. After the laser receiver captures the reflected light, according to the triangulation principle, by measuring the angle and distance of the reflected light, the thickness of the antenna at this point is calculated; It should be noted that the thickness detection module can also use an ultrasonic on-line thickness measurement system, which is provided with an ultrasonic transmitting probe: generating ultrasonic pulses and transmitting them to the strip-shaped RFID antenna; an ultrasonic receiving probe: receiving the ultrasonic signals passing through the antenna or reflected from the bottom surface of the antenna; a signal processing circuit: amplifying, filtering and other processing of the ultrasonic signals transmitted by the receiving probe, and extracting the characteristic signals related to the antenna thickness; a controller: coordinating the work of the transmitting probe and the receiving probe, controlling the measurement frequency and time interval, and converting the processed signals into antenna thickness data; working process: when the strip-shaped RFID antenna is continuously conveyed, the ultrasonic transmitting probe transmits ultrasonic pulses to the antenna, the ultrasonic waves propagate in the antenna, and reflection occurs when encountering the bottom surface of the antenna or different medium interfaces inside the antenna. After the receiving probe receives the reflected wave, the signal processing circuit calculates the thickness of the antenna according to the propagation speed and propagation time of the ultrasonic waves in the antenna material; It should be noted that the thickness detection module can also use a machine vision thickness measurement system, which is provided with an industrial camera: used to capture images of the strip-shaped RFID antenna, usually a high-resolution, high-speed line array camera or area array camera is adopted to obtain a clear image of the antenna surface; a light source: providing uniform and stable illumination for the camera to capture images, ensuring that the surface features of the antenna are clearly visible, and different types of light sources can be selected according to the material and surface characteristics of the antenna, such as white light source, infrared light source, etc.; an image processing unit: processing and analyzing the images captured by the camera, and extracting the edge and thickness features of the antenna; measurement software: based on image processing algorithms, calculating and analyzing the extracted features, obtaining the thickness value of the antenna, and realizing real-time display and data recording; working process: during the continuous conveyance of the strip-shaped RFID antenna, the industrial camera captures images of the antenna at a certain frequency in cooperation with the light source; the image processing unit performs processing such as grayscale conversion, filtering, and edge detection on the captured images, extracts the upper and lower edge contours of the antenna, and then calculates the thickness of the antenna by measuring the pixel distance between the upper and lower edges and combining the imaging parameters of the camera and the calibration relationship of the actual physical size; It should be noted that the thickness detection module can adopt other thickness measurement components that can routinely and real-time monitor the thickness of the conforming rear film body in the prior art to realize the monitoring function of the thickness of the conforming rear film body.

[0030] In the present invention, a torsion monitoring module is provided in the pressing block 502. The torsion monitoring module is used to obtain the torsion of the torsion spring connecting the pressing block 502 and the fixed shaft 501 in real time, upload the data monitored by the torsion monitoring module and the thickness detection module 11 to the central processor for comprehensive analysis, and adjust the magnitude of the current energizing the electromagnetic block 402 according to the analysis result. The control logic is as follows: Step 1: Set a comprehensive value in the central processor according to the product quality requirements standard range ; Step 2: In the central processing unit, preset the weight coefficient of the torsion according to the importance of the influence of torsion and thickness on product quality in the process and the weight coefficient of the thickness , and satisfy ; Step 3: The torsion monitoring module obtains the torsion value of the torsion spring connecting the pressing block 502 and the fixed shaft 501 in real time , and the thickness detection module 11 obtains the thickness value of the composite film body in real time , and synchronously uploads these two data to the central processing unit; Step 4: The central processing unit uses the set weight coefficient and the collected real-time data to calculate a comprehensive value , which reflects the comprehensive situation of torsion and thickness in the current pressing state. The calculation formula is: , where is the standard range of the preset torsion in the central processing unit, the standard range of the composite film thickness. In the formula, is to normalize the torsion value to the interval , is to normalize the thickness value to the interval , and then obtains the comprehensive value through weighted summation with the weight coefficient. The range of is also ; Step 5: Compare the calculated comprehensive value with the standard range : If , it indicates that the current pressing state is normal, and the current magnitude of the energized electromagnetic block 402 is maintained ; if , it means that the overall pressing effect does not meet the requirements, which may be due to insufficient pressure or insufficient thickness, etc., and the energized current of the electromagnetic block 402 needs to be increased; if , it indicates that the overall pressing is excessive, and the energized current of the electromagnetic block 402 needs to be decreased; Step 6: According to the result of the analysis and judgment, the central processing unit adjusts the energized current magnitude of the electromagnetic block 402 according to the rule. When the current needs to be increased, calculate the new current value according to the formula , and send an instruction to the power control circuit to adjust the energized current of the electromagnetic block 1 to ; when the current needs to be decreased, use the formula ; where the current adjustment amount The calculation formula is: , in the formula, ​It is an adjustment coefficient set according to the actual production situation and is used to control the amplitude of current adjustment. This formula determines the current adjustment amount based on the absolute value of the deviation between the comprehensive value and the average value of the standard range. The greater the deviation, the greater the current adjustment amount. Step 7: The torque monitoring module and the thickness detection module 11 continuously monitor the torque value and the thickness value in the new state and feedback them to the central processing unit. The central processing unit conducts analysis and judgment again. If the values still do not reach the standard range, the current is continuously adjusted until both the torque value and the thickness value are within the set standard range.

[0031] Example 4: Refer to Figures 1 - 10 , a composite device for producing RFID antennas. On the basis of Example 2, a thickness detection module 11 is provided at the position between the pressing member 5 and the hot pressing chamber 6 on the composite table 4 for obtaining the thickness of the film body in real time after lamination. It should be noted that the thickness detection module can use a laser scanning thickness measurement system, which is provided with a laser emitter: emitting a laser beam to the strip-shaped RFID antenna. Generally, a line laser emitter is selected, which can form a laser line in the width direction of the antenna to obtain the thickness information in the width direction of the antenna; a laser receiver: receiving the laser signal reflected from the antenna surface and converting it into an electrical signal; a data processing unit: analyzing and processing the electrical signal transmitted by the laser receiver to calculate the thickness value of the antenna. Working process: During the conveying process of the strip-shaped RFID antenna, the laser beam emitted by the laser emitter irradiates the antenna surface. The laser is reflected on the upper and lower surfaces of the antenna. After the laser receiver captures the reflected light, according to the triangulation principle, by measuring the angle and distance of the reflected light, the thickness of the antenna at this point is calculated. It should be noted that the thickness detection module can also use an ultrasonic on-line thickness measurement system, which is provided with an ultrasonic transmitting probe: generating an ultrasonic pulse and transmitting it to the strip-shaped RFID antenna; an ultrasonic receiving probe: receiving the ultrasonic signal passing through the antenna or reflected from the bottom surface of the antenna; a signal processing circuit: amplifying, filtering, etc. the ultrasonic signal transmitted by the receiving probe to extract the characteristic signal related to the antenna thickness; a controller: coordinating the work of the transmitting probe and the receiving probe, controlling the measurement frequency and time interval, and converting the processed signal into the antenna thickness data. Working process: When the strip-shaped RFID antenna is continuously conveyed, the ultrasonic transmitting probe emits an ultrasonic pulse to the antenna. The ultrasonic wave propagates in the antenna and is reflected when it encounters the bottom surface of the antenna or the interface of different media inside the antenna. After the receiving probe receives the reflected wave, the signal processing circuit calculates the thickness of the antenna according to the propagation speed and propagation time of the ultrasonic wave in the antenna material. It should be noted that the thickness detection module can also use a machine vision thickness measurement system, which is equipped with an industrial camera: used to capture images of the strip-shaped RFID antenna. Usually, a high-resolution, high-speed line array camera or area array camera is adopted to obtain a clear image of the antenna surface; a light source: provides uniform and stable lighting for the camera to capture images, ensuring that the surface features of the antenna are clearly visible. Different types of light sources can be selected according to the material and surface characteristics of the antenna, such as white light sources, infrared light sources, etc.; an image processing unit: processes and analyzes the images captured by the camera, extracts the edges and thickness features of the antenna; a measurement software: based on image processing algorithms, calculates and analyzes the extracted features, obtains the thickness value of the antenna, and realizes real-time display and data recording; working process: during the continuous conveying process of the strip-shaped RFID antenna, the industrial camera, in cooperation with the light source, captures images of the antenna at a certain frequency; the image processing unit performs processing such as grayscale conversion, filtering, and edge detection on the captured images, extracts the upper and lower edge contours of the antenna, and then calculates the thickness of the antenna by measuring the pixel distance between the upper and lower edges and combining the imaging parameters of the camera and the calibration relationship of the actual physical dimensions. It should be noted that the thickness detection module can adopt other thickness measurement components that can conventionally monitor the thickness of the composite rear film body in real time in the prior art to realize the monitoring function of the thickness of the composite rear film body.

[0032] In the present invention, a tensile force monitoring module is provided on the fixed ring 903. The tensile force monitoring module monitors the tensile force in the stretched state of the second spring 904 in real time and uploads it to the central processing unit. The central processing unit comprehensively analyzes the tensile force monitoring module and the thickness detection module, and controls and adjusts the magnitude of the current passing through the electromagnetic block three 902. The control logic is as follows: Step 1: Preset the target thickness value of the composite rear film body in the central processing unit and the target value of the tensile force of the second spring , and at the same time set the allowable fluctuation ranges of the thickness and the tensile force. The thickness fluctuation range is , and the tensile force fluctuation range is ; The tensile force monitoring module collects the tensile force value in the stretched state of the second spring in real time , and the thickness detection module 11 collects the thickness value of the composite rear film body in real time , and quickly uploads the data to the central processing unit; Step 2: First, compare the real-time thickness value with the allowable thickness fluctuation range: If , it indicates that the thickness of the film body is insufficient. At this time, regardless of the state of the tensile force, priority is given to increasing the pressure of the hot pressing member 8, that is, increasing the current passing through the electromagnetic block three 902, in order to expect to increase the hot pressing degree to make the thickness of the film body reach the standard; if , it indicates that the thickness of the film body is too large, and it is necessary to reduce the energizing current of the electromagnetic block three 902 and lower the pressure of the hot pressing part 8; When the thickness value is within the allowable fluctuation range, then compare the real-time tensile force value with the allowable fluctuation range of the tensile force: If , it means that the tensile force of the second spring 904 is too small, which may affect the stability and uniformity of hot pressing. At this time, appropriately increase the energizing current of the electromagnetic block three 902 to increase the downward acting force of the hot pressing part 8, and then adjust the tensile force; If , then reduce the energizing current of the electromagnetic block three 902; Step Three: According to the above judgment results, the central processing unit changes the energizing current of the electromagnetic block three 902 according to different adjustment coefficients; When the thickness does not meet the standard, if it is necessary to increase the pressure, that is, increase the current, use the adjustment coefficient , and calculate the new current value according to the formula ; if it is necessary to reduce the pressure, that is, reduce the current, use the adjustment coefficient , and calculate according to the formula ; When the thickness meets the standard but the tensile force does not meet the standard, if it is necessary to increase the tensile force, that is, increase the current, use the adjustment coefficient , and calculate according to the formula ; if it is necessary to reduce the tensile force, that is, reduce the current, use the adjustment coefficient , and calculate according to the formula ; Among them, each adjustment coefficient , , , can be set according to the actual performance of the equipment and production experience; Step Four: The tensile force monitoring module and the thickness detection module 11 continuously monitor the tensile force value and the thickness value, and feedback them to the central processing unit in real time. The central processing unit makes judgments and adjustments again according to the new data. If the current adjustment makes the thickness or the tensile force close to but not fully reach the target range, a smaller adjustment coefficient is used for fine-tuning to ensure the stability of the hot pressing state and the product quality meets the requirements; If abnormal fluctuations occur during the adjustment process, such as the thickness or the tensile force changes too fast, the central processing unit suspends the adjustment and issues an alarm, waiting for manual inspection and intervention.

[0033] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A composite device for producing RFID antennas, comprising a composite table (4), a pressing member (5) and a hot pressing chamber (6) are arranged on the composite table (4), characterized in that, The pressing member (5) is provided with a horizontally placed fixed shaft (501). The outer wall of the fixed shaft (501) is rotationally connected with a pressing block (502) through a torsion spring. A magnetic strip (503) is embedded on the side of the pressing block (502) close to the hot pressing chamber (6). At both ends of the top of the composite table (4), an electromagnet block one (402) is installed.

2. The composite device for producing an RFID antenna according to claim 1, wherein The sides of the composite table (4) and the pressing block (502) away from the hot pressing chamber (6) are both set to be arc-shaped structures arched outwards. Two guide pieces one (403) are installed on the side of the composite table (4) away from the hot pressing chamber (6). Two guide pieces three (504) are installed on the side of the pressing block (502) away from the hot pressing chamber (6).

3. The composite device for producing RFID antennas according to claim 1, characterized in that, Above the pressing member (5), two limiting mechanisms (7) are provided. The limiting mechanism (7) includes a guiding frame (702). A slider (703) is slidably limited in the guiding frame (702). A limiting ball (706) is connected to the bottom of the slider (703). A limiting groove (505) is opened at the position corresponding to the limiting ball (706) on the top of the pressing block (502). The depth of the limiting groove (505) gradually decreases towards the direction close to the hot pressing chamber (6). The outer wall of the bottom of the limiting ball (706) is in sliding contact with the inner wall of the limiting groove (505).

4. A composite device for manufacturing an RFID antenna according to claim 3, wherein, A spring one (704) is connected between the slider (703) and one side inner wall of the guiding frame (702). An electromagnet block two (707) is installed on the side of the guiding frame (702) away from the spring one (704). After being electrified, the electromagnet block two (707) is magnetically adsorbed to the slider (703).

5. A composite device for producing an RFID antenna according to any one of claims 1 to 4, characterized in that, A thickness detection module (11) is provided at the position on the composite table (4) between the pressing member (5) and the hot pressing chamber (6) for obtaining the thickness of the composite film body in real time.

6. The composite device for producing an RFID antenna according to claim 5, wherein, A torsion monitoring module is arranged in the pressing block (502). The torsion monitoring module is used to obtain the torsion of the torsion spring in real time. The data monitored by the torsion monitoring module and the thickness detection module (11) are uploaded to the central processor for comprehensive analysis, and the magnitude of the current for energizing the electromagnet block one (402) is adjusted according to the analysis result.

7. The composite device for producing RFID antennas according to claim 5, characterized in that, A rotatable hot pressing member (8) is arranged in the hot pressing chamber (6). The hot pressing member (8) is provided with a column (801). Four hot pressing rods (802) are connected to the bottom end of the column (801). Adjacent two hot pressing rods (802) are perpendicular to each other.

8. The composite device for producing an RFID antenna according to claim 7, characterized in that, A driving rod (9) is rotationally connected to the top of the hot pressing chamber (6). The top end of the driving rod (9) is drivingly connected with a motor (10). A sliding column (901) with a rectangular cross-section is installed at the bottom end of the driving rod (9). A sliding groove (803) is opened at the top end of the column (801). The outer wall of the sliding column (901) is in sliding contact with the inner wall of the sliding groove (803). A fixing ring (903) is installed on the outer wall of the driving rod (9). A spring two (904) is connected between the fixing ring (903) and the column (801).

9. The composite device for producing an RFID antenna according to claim 8, wherein, A magnet (804) is detachably connected to the bottom end of the sliding groove (803). An electromagnet block three (902) is installed at the bottom end of the sliding column (901). After the electromagnet block three (902) is electrified, it is magnetically repelled by the magnet (804).

10. A composite device for manufacturing an RFID antenna according to claim 9, wherein, A tensile force monitoring module is provided on the fixed ring (903). The tensile force monitoring module monitors the tensile force in the stretching state of the second spring (904) in real time and uploads it to the central processing unit. The central processing unit comprehensively analyzes the tensile force monitoring module and the thickness detection module, and controls and adjusts the magnitude of the current applied to the third electromagnet (902).

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