A composite device for RFID antenna production

Abstract

The application belongs to the technical field of RFID antennas, and particularly relates to a composite device for RFID antenna production, which comprises a composite table, a pressing piece and a hot pressing chamber arranged on the composite table, a fixed shaft arranged horizontally on the pressing piece, a pressing block rotatably connected to the outer wall of the fixed shaft through a torsion spring, and a magnetic attraction strip embeddedly arranged on the side of the pressing block close to the hot pressing chamber, and an electromagnetic block one arranged at the top of the composite table. The current size of the electromagnetic block one is adjusted, the intensity of the pressure applied to the downward deflection of the pressing block is adjusted more accurately, the accuracy of the antenna composite pressure control is ensured, and the composite operation effect is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of RFID antennas, and in particular to a composite device for RFID antenna production. BACKGROUND

[0002] The RFID antenna is a communication induction antenna, and generally forms an RFID electronic tag transponder together with a chip.

[0003] Referring to the Chinese patent CN111370844A, a kind of RFID ultra-high frequency antenna production equipment and manufacturing process are disclosed, the RFID ultra-high frequency antenna production equipment includes PET film unwinding device, aluminum foil unwinding device, PET film surface gluing device, PET film and aluminum foil composite device, UV curing device, hob die cutting device and winding device, aluminum foil on aluminum foil unwinding device is introduced into PET film and aluminum foil composite device, PET film on PET film unwinding device is introduced into PET film and aluminum foil composite device by PET film surface gluing device, the composite film of aluminum foil and PET film is sequentially passed through UV curing device and hob die cutting device and is wound by winding device.

[0004] But in the process of PET film and aluminum foil composite, the pressing depth or pressing strength is often dynamically adjusted according to the actual situation, and the composite structure of the conventional roller body is low in adjustment precision, which will affect the composite effect. SUMMARY

[0005] Based on the technical problems in the background art, the application provides a composite device for RFID antenna production.

[0006] The composite device for RFID antenna production provided by the application comprises a composite table, a pressing part and a hot pressing chamber are arranged on the composite table, the pressing part is provided with a fixed shaft arranged horizontally, a pressing block is rotatably connected to the outer wall of the fixed shaft 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, and an electromagnetic block one is installed at the two ends of the top of the composite table.

[0007] Preferably, the side of the composite table and the pressing block away from the hot pressing chamber is arranged in an arc shape that arches outward, two guide plates one are installed on the side of the composite table away from the hot pressing chamber, and two guide plates three 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 part, the limiting mechanism comprises a guide frame, a sliding block is slidingly arranged in the guide frame, a limiting ball is connected to the bottom of the sliding block, a limiting groove is formed in the top of the pressing block and corresponds to the limiting ball, the depth of the limiting groove gradually decreases towards the hot pressing chamber, and the outer wall of the bottom of the limiting ball slidingly contacts the inner wall of the limiting groove.

[0009] Preferably, a spring one is connected between the sliding block and the inner wall of one side of the guide frame, an electromagnetic block two is installed on the side of the guide frame away from the spring one, and the electromagnetic block two is magnetically adsorbed with the sliding block after being electrified.

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

[0011] Preferably, a torsion monitoring module is arranged in the pressing block, and is used for acquiring the torsion of the torsion spring in real time, uploading the data monitored by the torsion monitoring module and the thickness detection module to the central processor for comprehensive analysis, and adjusting the current size of the electromagnetic block one according to the analysis structure.

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

[0013] Preferably, a driving rod is rotatably connected to the top of the hot pressing chamber, a motor is drivingly connected to the top end of the driving rod, a slide 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 stand column, the outer wall of the slide 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 spring two is connected between the fixing ring and the stand column.

[0014] Preferably, a magnet is detachably connected to the bottom end of the sliding groove, an electromagnetic block three is installed at the bottom end of the slide column, and the electromagnetic block three is repelled magnetically after being electrified.

[0015] Preferably, a tension monitoring module is arranged on the fixing ring, the tension monitoring module monitors the tension of the stretched state of the spring two in real time, and uploads the tension to the central processor, the central processor comprehensively analyzes the tension monitoring module and the thickness detection module, and controls and adjusts the current size of the electromagnetic block three.

[0016] The beneficial effects in the application are as follows:

[0017] 1、In the application, the current size of the electromagnetic block one is adjusted, the intensity of the pressure applied by the deflection of the pressing block downward can be more accurately adjusted, the accuracy of the antenna compounding pressure control is ensured, the compounding operation effect is improved, the part preliminarily pressed is gradually pressed downward through the adjustment and setting of the deflection of the pressing block around the fixed shaft, the omission caused by the movability of the pressing block is avoided, the jamming is effectively avoided because the deflection of the pressing block gradually increases the downward pressure depth in the film moving direction, and the continuity and effectiveness of the compounding are further improved.

[0018] 2、The limiting ball is vertically limited in the guide frame through the sliding block, so that the upward force of the composite film is mostly offset, and only a small part becomes the horizontal movement of the limiting ball, thereby effectively ensuring the effectiveness of the pressing, thereby improving the limiting stability effect of the limiting structure on the movable pressing block and improving the pressing effectiveness.

[0019] 3、The film body after compounding is assisted to be smoothed through the rotating hot pressing rod, the magnetic repulsion force between the electromagnetic block three and the magnet is adjusted through the current size of the electromagnetic block three, thereby adjusting the size of the downward pressing force of the hot pressing part, and the accuracy of the hot pressing adjustment is provided.

[0020] 4、The data monitored by the torsional spring position torsional force monitoring module and the thickness detection module are uploaded to the central processor for comprehensive analysis, and the current size of the electromagnetic block one is adjusted according to the analysis structure, so as to improve the timeliness and accuracy of the pressure control of the pressing block.

[0021] 5、The monitoring data of the spring two position tension monitoring module of the thickness detection module are comprehensively analyzed, so as to control and adjust the current size of the electromagnetic block three to realize the adjustment of the downward pressing force of the hot pressing part, and the accuracy and effectiveness of the compounding repair and hot pressing control are improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is an overall structure schematic view of a composite equipment for RFID antenna production provided by the present application;

[0023] Figure 2 It is a pressing part and electromagnetic block one distribution structure schematic view of a composite equipment for RFID antenna production provided by the present application;

[0024] Figure 3 It is a guide piece one and guide piece two distribution structure schematic view of a composite equipment for RFID antenna production provided by the present application;

[0025] Figure 4 It is a pressing part structure schematic view of a composite equipment for RFID antenna production provided by the present application;

[0026] Figure 5 It is a limiting mechanism structure schematic view of a composite equipment for RFID antenna production provided by the present application;

[0027] Figure 6 It is a hot pressing chamber structure schematic view of a composite equipment for RFID antenna production provided by the present application;

[0028] Figure 7 It is a hot pressing part use state one structure schematic view of a composite equipment for RFID antenna production provided by the present application;

[0029] Figure 8 A heat pressing piece using state structure diagram of a composite equipment for RFID antenna production is provided in the present application;

[0030] Figure 9 A heat pressing piece structure diagram of a composite equipment for RFID antenna production is provided in the present application;

[0031] Figure 10 A chute internal structure diagram of a composite equipment for RFID antenna production is provided in the present application.

[0032] In the figure: 1, a first unwinding roller, 101, aluminum foil, 102, a leveling roller, 2, a second unwinding roller, 201, PET film, 3, a glue applying roller, 301, a carrier roller, 4, a composite station, 401, a mounting frame, 402, an electromagnetic block, 403, a guide sheet, 404, a second guide sheet, 5, a pressing piece, 501, a fixed shaft, 502, a pressing block, 503, a magnetic attraction strip, 504, a third guide sheet, 505, a limiting groove, 6, a heat pressing chamber, 7, a limiting mechanism, 701, a fixed frame, 702, a guide frame, 703, a sliding block, 704, a first spring, 705, an extension rod, 706, a limiting ball, 707, a second electromagnetic block, 8, a heat pressing piece, 801, a vertical column, 802, a heat pressing rod, 803, a chute, 804, a magnet, 9, a driving rod, 901, a sliding column, 902, a third electromagnetic block, 903, a fixed ring, 904, a second spring, 10, a motor, 11, a thickness detection module. DETAILED DESCRIPTION

[0033] Example 1: Refer to Figures 1-5The utility model provides a kind of composite equipment for RFID antenna production, including composite table 4, composite table 4 is provided with press fitting 5 and hot pressing chamber 6, composite table 4 is provided with unwinding roller one 1 and unwinding roller two 2 away from hot pressing chamber 6, unwinding roller one 1 is used for unwinding copper foil 101, unwinding roller two 2 is used for unwinding PET film 201, unwinding roller one 1 is provided with flattening roller 102 between, flattening roller 102 is used for flattening copper foil 101 and is introduced to the position of composite table 4 to copper foil 101 with steering direction, it is provided with glue coating roller 3 between unwinding roller two 2 and composite table 4, glue coating roller 3 is used for the side of PET film 201 to be contacted with copper foil 101 carries out gluing operation, glue coating roller 3 is provided with carrier roller 301 below, for carrying the missed gluing and auxiliary extrusion corresponding position PET film to carry out gluing, the both ends of composite table 4 are fixed with mounting bracket 401 in the position corresponding with press fitting 5, press fitting 5 is provided with fixed shaft 501 placed horizontally, the both ends of fixed shaft 501 are fixedly connected between two mounting brackets 401, fixed shaft 501 is rotatably connected with press block 502 on the outer wall by torsional spring, press block 502 extends towards the side of fixed shaft 501 close to hot pressing chamber 6, press block 502 is embedded with magnetic attraction strip 503 close to hot pressing chamber 6, magnetic attraction strip 503 is parallelly arranged with fixed shaft 501, both ends of the top of composite table 4 are provided with embedding slot, embedding slot is installed with electromagnetic block one 402 corresponding with the position of magnetic attraction strip 503, it needs to be explained that, in normal state, the bottom of press block 502 can be horizontal by the torsional force of torsional spring, in the process of using, PET film 201 and copper foil 101 are sent to between composite table 4 and press fitting 5 and carry out pressing operation, and in the process of long time continuous pressing, the magnetic attraction operation of both ends of magnetic attraction strip 503 is carried out after two electromagnetic blocks one 402 are electrified, so that press block 502 is deflected downward to assist to apply pressure: on the one hand, the current size adjustment of electromagnetic block one 402 electrification can more accurately adjust the intensity of press block 502 deflected downward and press, to ensure the accuracy of antenna composite pressure control and improve the effect of composite operation, on the other hand, the adjustment setting of press block 502 deflection around fixed shaft 501 can not only realize the adjustment of maximum pressure application, but also can limit the maximum distance of pressure application by the fixed state of corresponding position of press block 502 and fixed shaft 501, that is, PET film 201 and copper foil 101 will be preliminarily pressed with fixed extrusion distance in the corresponding position of press block 502 and fixed shaft 501, to ensure the upper limit of limit pressing, and then gradually press the part of preliminary pressing by the deflection of press block 502, to ensure the pressing effect and avoid omission caused by the movability of press block 502, and effectively avoid jam by gradually increasing the depth of downward pressure in the direction of film movement, to further improve the continuity and effectiveness of composite.

[0034] In the application, the composite platform 4 and the pressing block 502 are provided with arc-shaped structures which are arched outward away from the side of the hot pressing chamber 6, the side of the composite platform 4 and the pressing block 502 away from the hot pressing chamber 6 is flush, two guide plates one 403 are installed on the side of the composite platform 4 away from the hot pressing chamber 6, the two guide plates one 403 are distributed at the two ends of the PET film 201, two guide plates three 504 are installed on the side of the pressing block 502 away from the hot pressing chamber 6, the two guide plates three 504 are distributed at the two ends of the copper foil 101, a guide plate two 404 is installed on the top of the composite platform 4 corresponding to the guide plate one 403, the guide plate two 404 is distributed at the two ends of the composite film, so that the positioning of the guide plates is used to ensure the accuracy of the movement of the PET film 201 and the copper foil 101 and the composite film after the pressing and to prevent the deviation effect during the continuous conveying and pressing operation, so as to ensure the pressing effect.

[0035] In the application, two limiting mechanisms 7 are arranged above the pressing member 5, the limiting mechanism 7 comprises a guide frame 702 which is arranged vertically with the fixed shaft 501, the guide frame 702 is horizontally placed, a fixed frame 701 is fixed between the guide frame 702 and the mounting frame 401, a sliding block 703 is slidingly arranged in the guide frame 702, a vertical downward extending extension rod 705 is connected to the bottom of the sliding block 703, a limiting ball 706 is installed at the bottom end of the extension rod 705, a limiting groove 505 is arranged 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 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, the limiting ball 706 is moved towards the hot pressing chamber 6 by the sliding block 703, so as to adjust the position limitation of the upward deflection of the pressing block 502, when the pressing block 502 is pressed downwards by the magnetic attraction between the electromagnetic block one 402 and the magnetic attraction strip 503, the composite film may rebound and apply force to the pressing block 502 upwards due to 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 limiting ball 706 is vertically limited, on the other hand, the limiting ball 706 is vertically limited in the guide frame 702 by the sliding block 703, so that most of the upward force of the composite film is offset and only a small part becomes the horizontal movement of the limiting ball 706, so as to effectively ensure the pressing effectiveness, thereby improving the limiting stability effect of the limiting mechanism 7 on the movable pressing block 502 and improving the pressing effectiveness.

[0036] In the application, the spring one 704 is connected between the sliding block 703 and the inner wall of one side of the guide frame 702, the electromagnetic block two 707 is installed on the side of the guide frame 702 away from the spring one 704, the electromagnetic block two 707 is magnetically adsorbed with the sliding block 703 after being electrified, the magnetic attraction difference between the electromagnetic block two 707 and the sliding block 703 after being electrified is used to overcome the force of the spring one 704, so as to adjust the position of the limiting ball 706 in the limiting groove 505, and the position of the limiting ball 706 is accurately and timely adjusted when the pressing block 502 is deflected and pressed in different states by adjusting the current size of the electromagnetic block two 707.

[0037] Embodiment 2: Refer to Figures 1-10 A composite device for RFID antenna production, on the basis of embodiment 1, the hot pressing chamber 6 is provided with a rotatable hot pressing part 8, the hot pressing part 8 is provided with a vertical column 801, the bottom end of the vertical column 801 is connected with four hot pressing rods 802, adjacent two hot pressing rods 802 are vertically arranged, the hot pressing rod 802 is internally provided with a heating assembly, the hot pressing rod 802 is made of heat-conducting material, and the vertical column 801 is made of heat-insulating material; the top of the composite film body is hot pressed in the hot pressing chamber 6 by the rotating hot pressing rod 802, and the composite film body is assisted to be smoothed by the rotating hot pressing rod 802.

[0038] It should be noted that, as Figure 7 shown: two hot pressing rods 802 are arranged in parallel with 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, the hot pressing rod 802 is in the state of maximum coverage width area; and as Figure 8 shown: the four hot pressing rods 802 are arranged in an X-shaped structure in the moving direction of the composite film body, at this time, the hot pressing rod 802 is in the state of minimum coverage width area; and in the state as Figure 8 shown, the hot pressing rod 802 can completely cover the width direction range of the composite film body, so as to ensure that the rotating hot pressing part 8 can completely hot press the continuously conveyed composite film body; and the hot pressing part 8 is rotated by one hundred and eighty degrees from the state as Figure 7 shown, so that one of the hot pressing rods 802 can move from one side of the composite film body to the other side for smoothing, and then the hot pressing part 8 is reversely rotated by one hundred and eighty degrees for hot pressing and smoothing, thereby ensuring the completeness of hot pressing and improving the hot pressing efficiency.

[0039] In the application, the top of the hot pressing chamber 6 is rotatably connected with a vertically downward extending driving rod 9 through a bearing, the top end of the driving rod 9 is drivingly connected with a motor 10, the bottom end of the driving rod 9 is provided with a rectangular cross-section slide column 901, the top end of the stand column 801 is provided with a sliding groove 803, the outer wall of the slide column 901 is in sliding contact with the inner wall of the sliding groove 803, the outer wall of the driving rod 9 above the stand column 801 is provided with a fixing ring 903, the fixing ring 903 and the stand column 801 are connected with a spring 904, the bottom end of the sliding groove 803 is detachably connected with a magnet 804, the bottom end of the slide column 901 is provided with an electromagnetic block 902, the electromagnetic block 902 repels the magnet 804 after being electrified, so that the magnetic repulsion force between the electromagnetic block 902 and the magnet 804 is adjusted by the current size of the electromagnetic block 902, so as to adjust the force of the hot pressing piece 8, and the accuracy of the hot pressing adjustment is provided.

[0040] Embodiment 3: refer to Figures 1-5 A composite device for RFID antenna production, on the basis of embodiment 1, a thickness detection module 11 is arranged between the pressing piece 5 and the hot pressing chamber 6 on the composite table 4, which is used for real-time acquisition of the thickness of the composite film body;

[0041] 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 selecting a line laser emitter, which can form a laser line in the width direction of the antenna, so as 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 electric signal; a data processing unit: analyzing and processing the electric 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 surface of the antenna, the laser is reflected on the upper and lower surfaces of the antenna, and after the laser receiver captures the reflected light, according to the principle of triangulation, the thickness of the antenna at the point is calculated by measuring the angle and distance of the reflected light;

[0042] It should be noted that the thickness detection module can also use an ultrasonic online thickness measurement system, which is provided with an ultrasonic transmitting probe: generates ultrasonic pulses and transmits them to the strip RFID antenna; an ultrasonic receiving probe: receives ultrasonic signals that pass through the antenna or are reflected from the bottom surface of the antenna; a signal processing circuit: amplifies, filters, and processes the ultrasonic signals transmitted by the receiving probe to extract characteristic signals related to the thickness of the antenna; a controller: coordinates the work of the transmitting probe and the receiving probe, controls the frequency and time interval of the measurement, and converts the processed signals into antenna thickness data; working process: when the strip RFID antenna is continuously transported, the ultrasonic transmitting probe transmits ultrasonic pulses to the antenna, and the ultrasonic waves propagate in the antenna. When encountering the bottom surface of the antenna or the interface between different media inside, they will be reflected. After the receiving probe receives the reflected wave, the signal processing circuit calculates the thickness of the antenna based on the propagation speed and propagation time of the ultrasonic waves in the antenna material;

[0043] 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 RFID antenna, usually using a high-resolution, high-speed linear array camera or area array camera to obtain a clear image of the antenna surface; light source: provides uniform and stable lighting for camera shooting to ensure that the antenna surface features 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 source, infrared light source, etc.; image processing unit: processes and analyzes the images captured by the camera to extract the edge and thickness features of the antenna; measurement software: based on the image processing algorithm, calculates and analyzes the extracted features to obtain the thickness value of the antenna, and realizes real-time display and data recording; working process: during the continuous conveying of the strip RFID antenna, the industrial camera, in cooperation with the light source, captures the image of the antenna at a certain frequency; the image processing unit performs grayscale, filtering, edge detection and other processing on the captured image to extract 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 calibration relationship between the camera's imaging parameters and the actual physical size;

[0044] It should be noted that the thickness detection module can adopt other conventional thickness measuring components in the prior art that can monitor the thickness of the film body in real time to achieve the function of monitoring the thickness of the film body.

[0045] In the present invention, a torque monitoring module is provided in the pressing block 502. The torque monitoring module is used to obtain the torque of the torsion spring connecting the pressing block 502 and the fixed shaft 501 in real time. The data monitored by the torque monitoring module and the thickness detection module 11 are uploaded to the central processing unit for comprehensive analysis. The current of the electromagnetic block 1 402 is adjusted according to the analysis results. The control logic is as follows:

[0046] Step one, according to the product quality requirements, set the integrated value in the central processor standard range ;

[0047] Step two, in the central processor, according to the importance of the torsion and thickness in the process of the product quality, the weight coefficient of the torsion and the weight coefficient of the thickness , and meet ;

[0048] Step three, the torsion monitoring module real-time acquisition of the torsion value of the torsion spring between the pressing block 502 and the fixed shaft 501 , the thickness detection module 11 real-time acquisition of the thickness value of the composite film body , and synchronously upload the two data to the central processor;

[0049] Step four, the central processor uses the set weight coefficient and the collected real-time data to calculate an integrated value , which reflects the comprehensive situation of the torsion and thickness under the current pressing state, the calculation formula is: , wherein, is the standard range of the torsion in the central processor, the standard range of the composite film thickness, in the formula, is the torsion value normalized to the interval , is the thickness value normalized to the interval , and the integrated value is obtained by weighted summation through the weight coefficient, the range of ;

[0050] Step five, compare the calculated integrated value with the standard range : if , the current pressing state is normal, and the current current size of the electromagnetic block one 402 is maintained ; if , the overall pressing effect does not meet the requirements, which may be due to insufficient pressure or insufficient thickness, etc., and the current of the electromagnetic block one 402 needs to be increased; if , the overall pressing is excessive, and the current of the electromagnetic block one 402 needs to be reduced;

[0051] Step six, according to the results of analysis and judgment, the central processor adjusts the current size of the electromagnetic block one 402 according to the rules, when the current needs to be increased, according to the formula The new current value is calculated and a command is sent to the power control circuit to adjust the energizing current of the electromagnetic block one to When the current needs to be reduced, the formula is used; wherein the current adjustment amount The calculation formula is: , wherein, is an adjustment coefficient set according to actual production conditions, used to control the amplitude of current adjustment; the formula determines the current adjustment amount according to the absolute value of the deviation of the comprehensive value from the average value of the standard range; the greater the deviation, the greater the current adjustment amount;

[0052] Step seven, the torsion monitoring module and the thickness detection module 11 continuously monitor the torsion value and the thickness value in the new state and feed back to the central processor; the central processor analyzes and judges again, if the standard range has not been reached, the current is continuously adjusted until the torsion value and the thickness value are within the set standard range.

[0053] Example 4: refer to Figures 1-10 A composite device for RFID antenna production, on the basis of example 2, a thickness detection module 11 is arranged at a position between the pressing member 5 and the hot pressing chamber 6 on the composite table 4, for real-time acquisition of the thickness of the composite film body;

[0054] 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 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 principle of triangulation, the thickness of the antenna at the point is calculated by measuring the angle and distance of the reflected light;

[0055] It should be noted that the thickness detection module can also use an ultrasonic online thickness measurement system, which is provided with an ultrasonic transmitting probe that generates ultrasonic pulses and transmits them to the strip-shaped RFID antenna, an ultrasonic receiving probe that receives ultrasonic signals reflected back from the bottom surface of the antenna, a signal processing circuit that amplifies, filters, and processes ultrasonic signals received from the receiving probe, extracts characteristic signals related to the thickness of the antenna, a controller that coordinates the operation of the transmitting probe and the receiving probe, controls the frequency and time interval of the measurement, and converts the processed signals into antenna thickness data, and a 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 when they encounter the bottom surface or internal interfaces of different media, they are reflected, the receiving probe receives the reflected waves, and the signal processing circuit calculates the thickness of the antenna based on the propagation speed and time of the ultrasonic waves in the antenna material.

[0056] 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 for capturing images of the strip-shaped RFID antenna, usually using a high-resolution, high-speed linear array camera or area array camera to obtain clear antenna surface images, a light source for providing uniform and stable illumination for camera shooting to ensure that the antenna surface features 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 sources, infrared light sources, etc., an image processing unit that processes and analyzes the images captured by the camera to extract the edge and thickness features of the antenna, and a measurement software that calculates and analyzes the extracted features based on image processing algorithms to obtain the thickness value of the antenna and realize real-time display and data recording, and a working process: during the continuous conveying of the strip-shaped RFID antenna, the industrial camera captures images of the antenna at a certain frequency under the cooperation of the light source, the image processing unit processes the captured images through grayscale, filtering, edge detection, etc., extracts the upper and lower edge profiles 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 between the actual physical size.

[0057] It should be noted that the thickness detection module can use other thickness measurement components that can monitor the thickness of the composite back film body in real time according to existing technology to realize the monitoring function of the thickness of the composite back film body.

[0058] In the present application, the fixed ring 903 is provided with a tension monitoring module that monitors the tension of the stretched state of the spring 904 in real time and uploads it to the central processor, the central processor comprehensively analyzes the tension monitoring module and the thickness detection module, and controls the current size of the electromagnetic block 902, and the control logic is as follows:

[0059] Step one, set the target thickness value of the composite back film body in the central processor in advance And the target value of spring two tension , the thickness fluctuation range is , and the tension fluctuation range is ;

[0060] The tension monitoring module collects the tension value of the spring two tension state in real time , the thickness detection module 11 collects the thickness value of the composite film body in real time , and uploads the data to the central processor quickly;

[0061] Step two, first compare the real-time thickness value with the thickness fluctuation range: if , the film thickness is insufficient, at this time, no matter what state the tension is in, the pressure of the hot pressing part 8 is increased, that is, the current of the electromagnetic block three 902 is increased, in order to increase the hot pressing degree and make the film thickness meet the standard; if , the film thickness is too large, and the current of the electromagnetic block three 902 needs to be reduced to reduce the pressure of the hot pressing part 8;

[0062] When the thickness value is within the allowable fluctuation range, compare the real-time tension value with the tension fluctuation range: if , the spring two 904 tension is too small, which may affect the stability and uniformity of hot pressing, at this time, the current of the electromagnetic block three 902 is appropriately increased, so that the downward force of the hot pressing part 8 is increased, and then the tension is adjusted; if , the current of the electromagnetic block three 902 is reduced;

[0063] Step three, according to the above judgment result, the central processor changes the current of the electromagnetic block three 902 according to different adjustment coefficients;

[0064] When the thickness does not meet the standard, if the pressure needs to be increased, that is, the current is increased, the adjustment coefficient is used, and the new current value is calculated according to the formula ; if the pressure needs to be reduced, that is, the current is reduced, the adjustment coefficient is used, and the calculation is performed according to the formula ;

[0065] When the thickness meets the standard but the tension does not meet the standard, if the tension needs to be increased, that is, the current is increased, the adjustment coefficient is used, and the calculation is performed according to the formula ; if the tension needs to be reduced, that is, the current is reduced, the adjustment coefficient is used, and the calculation is performed according to the formula ;

[0066] Wherein, the adjustment coefficients , 、 、 All can be set according to the actual performance of the equipment and production experience;

[0067] Step four, the tension monitoring module and the thickness detection module 11 continuously monitor the tension value and the thickness value, and feedback to the central processor in real time, the central processor judges and adjusts again according to the new data, if the current adjustment makes the thickness or tension close to but not completely reach the target range, use smaller adjustment coefficient to fine-tune, ensure that the hot pressing state is stable and the product quality meets the requirements, if abnormal fluctuation occurs during the adjustment process, such as the thickness or tension changes too fast, the central processor suspends the adjustment and sends out an alarm, waiting for manual inspection and intervention.

[0068] The above describes only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art within the technical range disclosed by the present application, according to the technical scheme and the inventive concept of the present application, equivalent replacement or change, should be covered within the protection scope of the present application.

Claims

1. A composite device for producing RFID antennas, comprising a composite table (4), on which a pressing part (5) and a hot pressing chamber (6) are arranged, characterized in that: Mounting frames (401) are fixed at positions corresponding to the pressing member (5) at both ends of the composite platform (4). 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). The outer wall of the fixed shaft (501) is rotatably connected to a pressing block (502) via a torsion spring. The pressing block (502) extends toward a side of the fixed shaft (501) close to the hot pressing chamber (6). A magnetic strip (503) is embedded and installed on the side of the pressing block (502) close to the hot pressing chamber (6). The magnetic strip (503) is connected to the fixed shaft. (501) are arranged in parallel, and both ends of the top of the composite table (4) are provided with an embedding groove, and an electromagnetic block (402) corresponding to the position of the magnetic strip (503) is installed in the embedding groove. Under normal conditions, the torsion force of the torsion spring can make the bottom of the pressing block (502) horizontal; the PET film and the copper foil are fed between the composite table (4) and the pressing piece (5) for pressing operation, and during the long-term continuous pressing process, the two electromagnetic blocks (402) are energized and magnetically attracted to the two ends of the magnetic strip (503), so that the pressing block (502) is deflected downward to assist in applying pressure.

2. The composite equipment for producing RFID antennas according to claim 1, characterized in that: The side of the composite platform (4) and the pressing block (502) away from the hot pressing chamber (6) are both configured to be an outwardly arched arc structure. The side of the composite platform (4) away from the hot pressing chamber (6) is equipped with two guide pieces (403), and the side of the pressing block (502) away from the hot pressing chamber (6) is equipped with two guide pieces (504).

3. The composite equipment for producing RFID antennas according to claim 1, characterized in that: Two limiting mechanisms (7) are provided above the pressing piece (5), and the limiting mechanism (7) includes a guide frame (702), a slider (703) is provided in the guide frame (702) for limiting sliding, and the bottom of the slider (703) is connected to a limiting ball (706), and a limiting groove (505) is provided at a position corresponding to the limiting ball (706) on the top of the pressing block (502), and the depth of the limiting groove (505) gradually decreases toward 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).

4. The composite equipment for producing RFID antennas according to claim 3, characterized in that: A spring 1 (704) is connected between the slider (703) and an inner wall of one side of the guide frame (702), and an electromagnetic block 2 (707) is installed on the side of the guide frame (702) away from the spring 1 (704). When energized, the electromagnetic block 2 (707) and the slider (703) are magnetically attracted to each other.

5. The composite equipment for producing RFID antennas according to any one of claims 1 to 4, characterized in that: A thickness detection module (11) is provided on the composite platform (4) between the pressing piece (5) and the hot pressing chamber (6) for obtaining the thickness of the composite film in real time.

6. The composite equipment for producing RFID antennas according to claim 5, characterized in that: The pressing block (502) is provided with a torque monitoring module, which is used to obtain the torque of the torsion spring in real time, upload the data monitored by the torque monitoring module and the thickness detection module (11) to the central processing unit for comprehensive analysis, and adjust the current of the electromagnetic block (402) according to the analysis structure.

7. The composite equipment for producing RFID antennas according to claim 5, characterized in that: A rotatable hot pressing part (8) is provided in the hot pressing chamber (6), and the hot pressing part (8) is provided with a column (801). Four hot pressing rods (802) are connected to the bottom ends of the columns (801), and adjacent hot pressing rods (802) are vertically arranged between each other.

8. The composite equipment for producing RFID antennas according to claim 7, characterized in that: The top of the hot pressing chamber (6) is rotatably connected to a driving rod (9), the top end of the driving rod (9) is transmission-connected to a motor (10), the bottom end of the driving rod (9) is provided with a sliding column (901) with a rectangular cross-section, the top end of the column (801) is provided with a sliding groove (803), the outer wall of the sliding column (901) is in sliding contact with the inner wall of the sliding groove (803), the outer wall of the driving rod (9) is provided with a fixing ring (903), and a spring 2 (904) is connected between the fixing ring (903) and the column (801).

9. The composite equipment for producing RFID antennas according to claim 8, characterized in that: The bottom end of the slide groove (803) is detachably connected to a magnet (804), and the bottom end of the slide column (901) is installed with an electromagnetic block three (902). After the electromagnetic block three (902) is energized, it magnetically repels the magnet (804).

10. The composite equipment for producing RFID antennas according to claim 9, characterized in that: The fixing ring (903) is provided with a tension monitoring module, which monitors the tension of the spring 2 (904) in a stretched state in real time and uploads the information to the central processing unit. The central processing unit performs a comprehensive analysis on the tension monitoring module and the thickness detection module, and controls and adjusts the current of the electromagnetic block 3 (902).

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