On-line automatic thickness measuring device for copper-clad plate

Abstract

The invention provides an online automatic thickness measuring device for a copper-clad plate, and relates to the technical field of laser measurement, the online automatic thickness measuring device comprises a conveying frame, and a conveying device is arranged on the conveying frame to convey the copper-clad plate; the measuring frame is provided with a laser measuring device so as to measure the thickness of the copper-clad plate; wherein the conveying frame and the measuring frame are independently arranged, and the measuring frame can move relative to the conveying frame. Compared with the prior art, the copper-clad plate thickness detection device has the advantages that thickness detection can be carried out in a real-time and non-contact mode in the copper-clad plate conveying process, the influence of artificial factors on the detection precision is effectively avoided, and the detection accuracy is improved. And meanwhile, the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of laser measurement, and in particular to an online automatic thickness measurement device for a copper clad laminate. Background Art

[0002] Copper clad laminate is a laminate made of a reinforcing material (such as wood pulp paper or glass fiber cloth) impregnated with resin and then combined with copper foil through a hot pressing process. As a basic raw material in the electronics industry, it is widely used in the manufacture of printed circuit boards (PCBs). Copper clad laminates are widely used in electronic products such as televisions, radios, computers, and mobile communication devices, playing a key role in support and conductivity. In order to ensure the high performance and reliability of the circuit board, the quality requirements of copper clad laminates are very strict, especially in terms of thickness uniformity.

[0003] At present, the thickness of copper clad laminates is mostly measured by mechanical contact measuring instruments (such as micrometers), but they are greatly affected by human factors and have large measurement errors. Especially in the middle area of ​​the plate, contact measurement is inconvenient and inefficient, and cannot meet the production needs of high precision and high efficiency. Summary of the invention

[0004] In order to solve the above problems, the present application provides an online automatic thickness measurement device for copper clad laminates.

[0005] The present application provides an online automatic thickness measurement device for copper clad laminates, which adopts the following technical solution: An online automatic thickness measuring device for a copper clad laminate, comprising: A conveying rack, wherein a conveying device is provided on the conveying rack to convey the copper-clad laminate; A measuring frame, wherein a laser measuring device is provided on the measuring frame to measure the thickness of the copper clad laminate; The conveying frame and the measuring frame are independently arranged, and the measuring frame can move relative to the conveying frame.

[0006] Preferably, the conveying device comprises a first roller and a second roller rotatably arranged on the conveying frame, the first roller and the second roller are used to press the copper clad laminate between the first roller and the second roller, and at least one of the first roller and the second roller can be actively rotated; And / or, the conveying device includes a third roller and a fourth roller rotatably arranged on the conveying frame, the third roller and the fourth roller are used to press the copper clad laminate between the third roller and the fourth roller, and the third roller and the fourth roller are both passive rotating rollers, so as to drive the third roller and the fourth roller to rotate when the copper clad laminate passes between the third roller and the fourth roller.

[0007] Preferably, at least one of the third roller and the fourth roller is provided with a damping structure to increase the rotation resistance of at least one of the third roller and the fourth roller; And / or, the first roller and the second roller form a driving roller group, the third roller and the fourth roller form a passive roller group, the laser measuring device is located in the area between the driving roller group and the passive roller group, and the laser measuring device is arranged close to the driving roller group or the passive roller group.

[0008] Preferably, the laser measuring device includes a first laser displacement sensor and a second laser displacement sensor arranged on the measuring frame, one of the first laser displacement sensor and the second laser displacement sensor is located in the area below the copper clad laminate, and the other is located in the area above the copper clad laminate, and the first laser displacement sensor and the second laser displacement sensor are coaxially arranged in a direction perpendicular to the first plane.

[0009] Preferably, the measuring frame includes a first frame and a second frame, the first frame is located on one side of the copper clad laminate, and the second frame is located on the other side of the copper clad laminate, one of the first frame and the second frame is provided with a laser emitting component, and the other is provided with a laser receiving component, the laser emitting component is used to emit laser to be received by the laser receiving component; in the width direction of the copper clad laminate, the laser beam emitted by the laser emitting component is parallel to and in contact with the surface of the copper clad laminate.

[0010] Preferably, the conveyor rack is provided with a bonding portion, which has a bonding surface for bonding with the surface of the copper clad laminate, so that the copper clad laminate can be bonded with the bonding surface during transportation, and the laser emitting component and the laser receiving component are located on both sides of the copper clad laminate bonded with the bonding surface.

[0011] Preferably, the bonding portion is provided with a recessed groove, the recessed groove is recessed in a direction perpendicular to the first plane, and the recessed groove passes through the bonding portion along the width direction of the copper clad laminate, the laser emitting assembly includes a first laser emitter and a second laser emitter, the light beam emitted by the first laser emitter is located in the copper clad laminate area corresponding to the recessed groove, and the light beam emitted by the second laser emitter is located in an area outside the copper clad laminate area corresponding to the recessed groove.

[0012] Preferably, a guide surface is provided between the recessed groove and the bonding surface; in the conveying direction of the copper-clad laminate, an angle between the guide surface and the first plane is an acute angle.

[0013] Preferably, the conveyor rack is provided with a negative pressure cleaning mechanism to remove dust particles on the surface of the copper clad laminate, the negative pressure cleaning mechanism includes a negative pressure shell, the negative pressure shell extends and is distributed along the width direction of the copper clad laminate, and the extension length of the negative pressure shell in the width direction of the copper clad laminate is not greater than the width of the copper clad laminate, the negative pressure shell is provided with an inlet and an outlet, the flow area of ​​the outlet is greater than the flow area of ​​the inlet, so that the negative pressure shell is adsorbed on the surface of the copper clad laminate, and the outlet is connected to a negative pressure device.

[0014] Preferably, the negative pressure housing is used to be adsorbed on the surface of the copper-clad laminate, and the negative pressure in the cavity formed between the negative pressure housing and the copper-clad laminate is greater than the rupture pressure of the copper film on the surface of the copper-clad laminate; And / or, there are two negative pressure shells, the copper clad board includes a first surface and a second surface relative to each other, one of the negative pressure shells is used to be adsorbed on the first surface, and the other negative pressure shell is used to be adsorbed on the second surface, and the two negative pressure shells do not overlap in the direction perpendicular to the first plane.

[0015] The present invention has the following advantages and beneficial effects: The present invention can perform real-time, non-contact thickness detection of copper-clad laminates during transmission by providing a laser measuring device, effectively avoiding the influence of artificial factors on detection accuracy, while improving detection efficiency. By installing the laser measuring device on a measuring frame independent of the conveying frame, the present invention can effectively avoid the influence of external factors such as vibration and impact during the transmission process on the laser measuring device, and to a certain extent prevent the shaking of the measuring device caused by the vibration of the conveying frame, thereby causing measurement errors. This design not only ensures stability and accuracy during the measurement process, but also ensures efficient, dynamic and real-time monitoring, thereby meeting high-precision and high-efficiency production requirements. Through the reasonable configuration of the structure, the present invention significantly improves the accuracy and stability of copper-clad laminate thickness detection, and to a certain extent solves the detection error problem caused by contact measurement or vibration in traditional measurement methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application along the transmission direction of the copper-clad laminate.

[0018] Figure 2 It is a schematic diagram of the structure of an embodiment of the present application along the width direction of the copper clad laminate.

[0019] Figure 3 It is a structural diagram of the measuring frame.

[0020] The markings in the figure are: 10. Copper clad laminate; 100. Conveying rack; 110. Conveying device; 111. First roller; 112. Second roller; 113. Third roller; 114. Fourth roller; 120. Laminating portion; 121. Laminating surface; 122. Concave groove; 123. Guide surface; 130. Negative pressure cleaning mechanism; 131. Negative pressure shell; 131a. Inlet; 131b. Outlet; 200. Measuring rack; 210. Laser measuring device; 211. First laser displacement sensor; 212. Second laser displacement sensor; 220. First frame; 221. Laser emitting assembly; 221a. First laser emitter; 221b. Second laser emitter; 230. Second frame; 231. Laser receiving assembly. DETAILED DESCRIPTION

[0021] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0022] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0023] With the continuous advancement of science and technology, especially the increasing miniaturization of electronic products, the precision requirements of copper clad laminates are getting higher and higher. Copper clad laminates are increasingly used in electronic products, especially in high-precision fields. Once the precision of copper clad laminates is insufficient, it will not be able to meet the needs of specific applications, which will seriously affect its use in these fields. For example, copper clad laminates are often used in high-frequency circuits, precision electronic devices and other fields, which have very strict requirements on the thickness, flatness and other quality indicators of copper clad laminates. Therefore, ensuring that the production process of copper clad laminates can be accurately controlled and its defects can be detected in time has become the key to the current technological development.

[0024] At present, although there are many methods for measuring the thickness of copper clad laminates, the existing technology mainly focuses on the measurement of specific positions and cannot comprehensively detect the overall quality of copper clad laminates, especially it is difficult to identify common defects such as delamination, peeling, bulging, and depression. As a composite material made of copper foil and other materials pressed together, copper clad laminates are prone to these defects during the production process, especially in the hot pressing process. Due to factors such as improper pressure and temperature control or uneven materials, the adhesion between the copper foil and the substrate may be insufficient, resulting in peeling or delamination. In addition, mechanical stress and environmental changes may also cause bulging of the copper foil or depression of the substrate. Most of the existing detection methods rely on local manual inspection or contact measurement. These methods are not only inefficient, but also easily affected by manual operation, making it difficult to achieve efficient, accurate and comprehensive detection.

[0025] In order to solve this problem, the present application provides an online automatic thickness measurement device for copper clad laminates. The device adopts laser measurement technology and can realize high-precision online measurement of the thickness of copper clad laminates during the production process of copper clad laminates. Unlike the traditional contact measurement method, the laser measurement device of the present device can perform high-precision thickness detection without contacting the surface of the copper clad laminate, avoiding the interference of artificial factors and improving the accuracy and reliability of the measurement. At the same time, the surface of the copper clad laminate can be fully scanned through the laser emission component to effectively identify potential defects such as peeling, delamination, bulging and depression, thereby ensuring that the quality of the copper clad laminate meets the requirements of high-precision production and providing effective guarantee for high-precision production.

[0026] The following is a detailed description of an online automatic thickness measurement device for a copper clad laminate provided in an embodiment of the present application through specific embodiments and application scenarios.

[0027] Reference Figure 1 , Figure 2 , an embodiment of the present application provides an online automatic thickness measurement device for a copper clad laminate 10, the device comprising a conveying frame 100 and a measuring frame 200 which are independently arranged. The so-called "independently arranged" means that there is no direct physical connection between the conveying frame 100 and the measuring frame 200, thereby being able to effectively isolate the vibrations generated by the vibrations on the conveying frame 100 or other external factors from being transmitted to the measuring frame 200. This structural design is beneficial to improving the stability during the measurement process, avoiding errors in the laser measuring device 210 caused by vibration, thereby improving the accuracy and reliability of the measurement. Exemplarily, the conveying frame 100 is fixed to the ground, and the measuring frame 200 is also fixed to the ground. Such a setting can eliminate the dynamic influence caused by the operation of the conveying system to a certain extent.

[0028] The conveyor rack 100 is provided with a conveying device 110, which can convey the copper clad laminate 10 from the production line to the measuring area, thereby completing the online measurement. Exemplarily, the conveyor rack 100 is connected to the production line of the copper clad laminate 10. Here, "connected" means that during the production process, the conveyor rack 100, as one of the conveying devices of the copper clad laminate 10, can accurately convey the produced copper clad laminate 10 to the location of the measuring rack 200. Through this structure, the conveyor rack 100 and the conveying device 110 effectively undertake the task of conveying the copper clad laminate 10, ensuring that the copper clad laminate 10 smoothly enters the measuring area, and then performs thickness measurement.

[0029] In some embodiments, a laser measuring device 210 is provided on the measuring frame 200 for real-time, non-contact measurement of the thickness of the copper clad laminate 10. The design of the laser measuring device 210 can use multiple laser sensors to simultaneously measure the thickness at different positions. The setting of multiple laser sensors can cover a wider area, thereby further improving the accuracy of the thickness detection of the copper clad laminate 10, especially when measuring a large area of ​​the copper clad laminate 10, more measurement data can be obtained, thereby reducing the overall error caused by local measurement errors.

[0030] The laser measuring device 210 in the present application uses a non-contact measurement method, which not only reduces the error that may be caused by contact, but also effectively avoids damage to the surface of the copper clad laminate 10. The laser sensor accurately calculates the distance between the surface of the copper clad laminate 10 and the sensor by emitting a laser beam and receiving the reflected light signal, thereby obtaining its thickness. This process can improve the measurement efficiency and accuracy to a certain extent, and is particularly suitable for production lines with high quality requirements.

[0031] It is understood that the conveying frame 100 and the measuring frame 200 can be respectively composed of a plurality of different frames. Specifically, the conveying frame 100 can be composed of a plurality of supporting frames and conveying devices, which are arranged independently of each other to support and guide the conveying of the copper clad laminate. The conveying device can include a plurality of roller sets, a conveying motor, etc., through which the copper clad laminate is stably conveyed.

[0032] Similarly, the measuring frame 200 may also include multiple frames and measuring devices, and each frame may have different functions, such as supporting the laser measuring device, providing measurement support, etc. The design of multiple frames makes the measuring frame more flexible, and the position or angle of the frame can be adjusted as needed to adapt to different types of copper clad laminates for accurate measurement.

[0033] This frame combination design is beneficial to increasing the adaptability of the equipment and facilitating configuration and adjustment in actual production. It also helps to reduce the complexity of the mechanical structure and improve the reliability and maintainability of the overall system.

[0034] Reference Figure 1, Figure 2 According to an optional embodiment, the conveying device 110 includes a first roller 111 and a second roller 112 rotatably disposed on the conveying frame 100, and the first roller 111 and the second roller 112 are used to press the copper clad laminate 10 between the first roller 111 and the second roller 112, and at least one of the first roller 111 and the second roller 112 can be actively rotated. Through the cooperation of the first roller 111 and the second roller 112, the copper clad laminate 10 can be effectively conveyed, and at the same time, the shaking or deviation of the copper clad laminate 10 during the conveying process can be avoided, and the stability of the copper clad laminate 10 during the conveying process can be ensured. Through appropriate pressing, it can ensure that the copper clad laminate 10 remains flat, reduce uneven vibration and displacement, and thus facilitate subsequent thickness measurement.

[0035] According to an optional embodiment, the conveying device 110 includes a third roller 113 and a fourth roller 114 rotatably disposed on the conveying frame 100, and the third roller 113 and the fourth roller 114 are used to press the copper clad laminate 10 between the third roller 113 and the fourth roller 114, and the third roller 113 and the fourth roller 114 are both passive rotating rollers, so as to drive the third roller 113 and the fourth roller 114 to rotate when the copper clad laminate 10 passes between the third roller 113 and the fourth roller 114. When the copper clad laminate 10 passes between the third roller 113 and the fourth roller 114, the passively rotating third roller 113 and the fourth roller 114 rotate accordingly under the active traction of the first roller 111 and the second roller 112. In this way, the rotation of the third roller 113 and the fourth roller 114 can drive the copper clad laminate 10 to be smoothly conveyed, and at the same time, the tension formed between the first roller 111 and the third roller 113 makes the copper clad laminate 10 more flat and stable during the conveying process. Such a design can effectively prevent the copper clad laminate 10 from shaking during the transportation process, which is beneficial to improving the measurement accuracy and ensuring the flatness of the surface of the copper clad laminate 10 during the subsequent laser measurement process to obtain more accurate measurement data.

[0036] According to an optional embodiment, at least one of the third roller 113 and the fourth roller 114 is provided with a damping structure to increase the rotational resistance of at least one of the third roller 113 and the fourth roller 114. By increasing the rotational resistance of the third roller 113 or the fourth roller 114, the flattening effect on the copper clad laminate 10 can be enhanced, so that the surface of the copper clad laminate 10, especially in the measurement area, is smoother and more stable during the transmission process, and the measurement error caused by the ups and downs or unevenness of the copper clad laminate 10 is reduced. For example, the damping structure can be realized by providing a rubber friction sheet on the surface of the third roller 113 or the fourth roller 114. This design can effectively increase the pulling force on the copper clad laminate 10, so that the copper clad laminate 10 is more stable when passing through the measurement area, and further ensure that the laser measurement device 210 obtains accurate measurement results.

[0037] It is understandable that the first roller 111 and the second roller 112 of the conveyor 110 can adapt to copper clad laminates 10 of different sizes by adjusting their relative positions. Specifically, the first roller 111 or the second roller 112 can be slid and adjusted on the conveyor frame 100 through a slider, and the first roller 111 and the second roller 112 are actively set on the slider, so as to adjust the position of the first roller 111 or the second roller 112 while continuing to rotate. Through this design, the spacing between the rollers can be flexibly adjusted without affecting the conveying function to adapt to copper clad laminates 10 of different thicknesses and widths, thereby ensuring the stability of the conveying process.

[0038] Similarly, the third roller 113 and the fourth roller 114 can also be adjusted in a similar manner. Specifically, the adjustment of the first roller 111 and the second roller 112 and the third roller 113 and the fourth roller 114 can be achieved through a screw transmission structure. The screw transmission structure has precise adjustment capabilities and can adjust the relative positions between the rollers when necessary, thereby ensuring that the copper clad laminate 10 can pass smoothly during the transmission process. Specifically, the screw transmission structure can flexibly adjust the spacing between the rollers according to the size or thickness of the copper clad laminate 10, so that the conveying device 110 can adapt to copper clad laminates 10 of different specifications, while avoiding unstable transportation caused by the copper clad laminate 10 being too wide or too narrow.

[0039] Reference Figure 1 , Figure 2 According to an optional embodiment, the first roller 111 and the second roller 112 form a driving roller group, the third roller 113 and the fourth roller 114 form a passive roller group, and the laser measuring device 210 is located in the area between the driving roller group and the passive roller group, and the laser measuring device 210 is arranged close to the driving roller group or the passive roller group. Through this arrangement, the laser measuring device 210 can perform real-time measurement when the copper clad laminate 10 passes between the driving roller group and the passive roller group, thereby ensuring the accuracy of the measurement data. Since the laser measuring device 210 is located between the driving roller group and the passive roller group, the influence of vibration or deviation of the copper clad laminate 10 during the transmission process on the measurement result can be minimized, and the error caused thereby can be reduced, thereby improving the overall measurement accuracy.

[0040] When the laser measuring device 210 is arranged close to the driving roller group or the passive roller group, the copper clad laminate 10 located close to the driving roller group or the passive roller group is more stable during the conveying process, avoiding the unevenness of the copper clad laminate 10 caused by shaking or offset, and ensuring that the surface of the copper clad laminate 10 in the measuring area maintains high flatness and stability. This design is beneficial to improving the measurement accuracy and ensuring that the thickness data obtained is more accurate, thereby better meeting the needs of high-precision production.

[0041] Specifically, a rotating motor is connected to the first roller 111 or the second roller 112, and the motor drives the roller to rotate to achieve effective transmission of the copper clad laminate 10. The rotating motor can provide a stable torque as needed to ensure that the first roller 111 or the second roller 112 can rotate continuously and smoothly.

[0042] According to an optional embodiment, the laser measuring device 210 includes a first laser displacement sensor 211 and a second laser displacement sensor 212 disposed on the measuring frame 200, one of the first laser displacement sensor 211 and the second laser displacement sensor 212 is located in the area below the copper clad laminate 10, and the other is located in the area above the copper clad laminate 10, and the first laser displacement sensor 211 and the second laser displacement sensor 212 are coaxially disposed in a direction perpendicular to the first plane. Through this structural design, the first laser displacement sensor 211 and the second laser displacement sensor 212 can be accurately aligned with the upper and lower surfaces of the copper clad laminate 10, thereby obtaining a more accurate thickness measurement result.

[0043] Specifically, the first laser displacement sensor 211 can detect the distance from the upper surface of the copper clad laminate 10 to its sensor, while the second laser displacement sensor 212 measures the distance from the lower surface of the copper clad laminate 10 to its sensor. Since the distance between the first laser displacement sensor 211 and the second laser displacement sensor 212 is known, the actual thickness of the copper clad laminate 10 can be accurately obtained by calculating the distance difference between the upper and lower surfaces. This structure effectively copes with the possible shaking or slight deviation of the copper clad laminate 10, and relatively accurate thickness data can still be obtained through difference calculation.

[0044] The first plane is parallel to the transmission plane of the copper clad laminate 10, that is, the copper clad laminate 10 is transported in a direction parallel to the first plane. By setting the laser displacement sensor to coaxial alignment and measuring the upper and lower surfaces of the copper clad laminate 10 respectively, the measurement error can be minimized, the stability and accuracy of the measurement can be improved, thereby ensuring more reliable thickness data to meet the needs of high-precision production.

[0045] Reference Figure 2 , Figure 3According to an optional embodiment, the measuring frame 200 includes a first frame 220 and a second frame 230, the first frame 220 is located on one side of the copper clad laminate 10, and the second frame 230 is located on the other side of the copper clad laminate 10, one of the first frame 220 and the second frame 230 is provided with a laser emitting assembly 221, and the other is provided with a laser receiving assembly 231, the laser emitting assembly 221 is used to emit laser light to be received by the laser receiving assembly 231; in the width direction of the copper clad laminate 10, the laser beam emitted by the laser emitting assembly 221 is parallel to and in contact with the surface of the copper clad laminate 10. The laser beam emitted by the laser emitting assembly 221 is parallel to and in contact with the surface of the copper clad laminate 10, thereby effectively avoiding measurement errors caused by the uneven surface of the copper clad laminate 10.

[0046] The first frame 220 can be installed from one side of the copper clad laminate 10, and the second frame 230 can be installed from the other side of the copper clad laminate 10. This structural design helps to simplify the installation process of the measuring frame 200, reduce the installation difficulty, and is beneficial to improving production efficiency.

[0047] Through the cooperation of the laser emitting component 221 and the laser receiving component 231, it is possible to determine in real time whether there are protrusions or other uneven defects on the surface of the copper clad laminate 10. For example, when the copper clad laminate 10 has a bulge between the two, the light beam emitted by the laser emitting component 221 will be blocked by the bulge, causing the laser receiving component 231 to be unable to receive the laser signal. At this time, the laser receiving component 231 will transmit the signal to the control system to remind the production personnel that there is a defect in the area. This structural design can effectively monitor various positions on the surface of the copper clad laminate 10, which helps to detect and identify defective areas of the copper clad laminate 10 in real time.

[0048] Combined with the thickness measurement result of the laser measuring device 210, the detection accuracy can be further improved, thereby providing more reliable data support for the quality control of the copper clad laminate 10. Through the above-mentioned structural setting, the measurement error caused by the uneven surface or other defects of the copper clad laminate 10 can be reduced to a certain extent, while improving the stability and accuracy of the equipment to meet the needs of high-precision production.

[0049] Reference Figure 1 , Figure 2According to an optional embodiment, the conveying frame 100 is provided with a bonding portion 120, and the bonding portion 120 has a bonding surface 121 for bonding with the surface of the copper clad laminate 10, so that the copper clad laminate 10 is bonded with the bonding surface 121 during transportation, and the laser emitting component 221 and the laser receiving component 231 are located on both sides of the copper clad laminate 10 bonded with the bonding surface 121. Through the design of the bonding portion 120, the portion of the copper clad laminate 10 in contact with the bonding surface 121 during transportation can be made more stable, thereby reducing the shaking or deviation of the portion of the copper clad laminate 10 in contact with the bonding portion 120 during transportation.

[0050] This stable contact method helps to avoid abnormal blocking of the laser beam emitted by the laser emitting assembly 221 due to shaking during the transportation of the copper clad laminate 10, thereby ensuring the accuracy of the data during the laser measurement process. By maintaining the smooth transportation of the copper clad laminate 10, the measurement error caused by unstable factors during the transportation process can be effectively reduced, and the accuracy and stability of the measurement can be further improved to meet the needs of high-precision detection.

[0051] Specifically, a laser emitting component 221 and a laser receiving component 231 are provided on the measuring frame 200. The laser emitting component 221 and the laser receiving component 231 are located on both sides of the copper clad laminate 10 bonded to the bonding surface 121. The laser beam emitted by the laser emitting component 221 is exactly parallel to and bonded to the surface of the copper clad laminate 10. In this way, when there are quality defects on the surface of the copper clad laminate 10, the laser beam can be blocked, thereby facilitating the judgment of the defects.

[0052] It is understandable that the bonding surface 121 is made of a wear-resistant and smooth material. For example, the bonding surface 121 can be formed by coating a polytetrafluoroethylene (PTFE) layer. Specifically, coating a polytetrafluoroethylene coating at the location of the bonding surface 121 of the bonding portion 120 can effectively form the bonding surface 121. The advantage of this design is that when the copper clad laminate 10 contacts the bonding surface 121, the smooth surface of the polytetrafluoroethylene can effectively reduce the friction with the surface of the copper clad laminate, thereby avoiding scratches or damage to the surface of the copper clad laminate 10 due to excessive friction.

[0053] To further improve the protection effect of the system, illustratively, the bonding portion 120 can be made of a resin material with a lower hardness. This resin material can provide a certain buffering capacity, thereby reducing the mechanical impact force on the copper clad laminate 10, which is beneficial to avoid damage to the copper clad laminate 10 due to physical contact or pressure changes during operation. Through this structural design, the service life of the copper clad laminate 10 can be improved to a certain extent, and its surface can be effectively protected from external damage.

[0054] In addition, during the production process of the copper clad laminate 10, the surface is often uneven, especially when there is a bulge or protrusion on one side. Specifically, when the bulge of the copper clad laminate 10 is located on its lower surface and the bonding portion 120 is located on the lower side of the copper clad laminate 10, if the bulge contacts the bonding surface 121, the upper surface of the copper clad laminate 10 will be lifted, that is, the upper surface will be displaced to a certain extent, which may block the laser beam emitted by the laser emitting component 221. This change can effectively reflect the quality of the surface of the copper clad laminate 10, especially when the surface is uneven.

[0055] Similarly, when a bulge appears on the upper surface of the copper clad laminate 10 and faces away from the bonding surface 121, the bulge itself directly blocks the propagation of the laser beam when passing through the beam path emitted by the laser emitting assembly 221. This phenomenon can also help determine whether there are irregularities or quality defects on the surface of the copper clad laminate 10. By monitoring the obstruction of the laser beam, it is possible to quickly and effectively identify possible quality problems on the surface of the copper clad laminate 10 and further locate the specific defective area.

[0056] This method can help identify and evaluate the production quality of the copper clad laminate 10 to a certain extent, and promptly discover possible defects or uneven areas, thereby improving the quality control level in the production process.

[0057] Reference Figure 1 , Figure 3 According to an optional embodiment, the bonding portion 120 is provided with a recessed groove 122, the recessed groove 122 is recessed in a direction perpendicular to the first plane, and the recessed groove 122 passes through the bonding portion 120 along the width direction of the copper clad laminate 10, the laser emitting assembly 221 includes a first laser emitter 221a and a second laser emitter 221b, the light beam emitted by the first laser emitter 221a is located in the area of ​​the copper clad laminate 10 corresponding to the recessed groove 122, and the light beam emitted by the second laser emitter 221b is located in an area outside the area of ​​the copper clad laminate 10 corresponding to the recessed groove 122.

[0058] During the production process of the copper clad laminate 10, the surface is often uneven, for example, there may be bulges or protrusions on one side. In order to effectively distinguish the locations where different defects of the copper clad laminate 10 occur, this embodiment achieves this function by providing a recessed groove 122. Specifically, when the bulge of the copper clad laminate 10 is located on the lower surface and the fitting portion 120 is located on the lower side of the copper clad laminate 10, the bulge will move to the position of the recessed groove 122 and be accommodated by the recessed groove 122. At this time, the upper surface of the copper clad laminate 10 remains smooth and will not block the laser beam emitted by the laser transmitter, thereby ensuring that the laser receiver can receive the complete laser signal.

[0059] On the other hand, when a bulge appears on the lower surface of the copper clad laminate 10 and the bulge moves to the position of the bonding surface 121, the bonding surface 121 will cause the upper surface of the copper clad laminate 10 to be lifted due to the effect of the bulge, resulting in the laser beam being blocked and the laser receiver being unable to receive the signal. If the bulge is located on the upper surface of the copper clad laminate 10, the laser beam will also be blocked, resulting in the laser receiver being unable to receive the signal. Through the changes in the laser beams emitted by the first laser emitter 221a and the second laser emitter 221b, it can be accurately determined whether the bulge appears on the upper surface or the lower surface of the copper clad laminate 10. It should be noted that the "upper surface of the copper clad laminate 10" mentioned here means that due to the appearance of a bulge on the other side of the copper clad laminate 10, when the bulge contacts the bonding surface 121, the pressure applied by the bonding surface 121 to the copper clad laminate 10 will cause the copper clad laminate 10 in the bulge area to move a certain distance away from the bonding surface 121, thereby showing that the upper surface of the copper clad laminate 10 is offset relative to the original position, and it looks like it is "lifted".

[0060] In addition, the first laser emitter 221a and the second laser emitter 221b are used in conjunction with the first laser receiver and the second laser receiver respectively, the first laser receiver is opposite to the first laser emitter 221a, and the second laser receiver is opposite to the second laser emitter 221b, so that when the copper clad laminate 10 passes through the measurement area, the surface condition of the copper clad laminate 10 can be detected and judged in real time and accurately. This design effectively realizes the distinction between different types of defects of the copper clad laminate 10, especially when facing the situation of irregular surface, it can accurately identify defects such as bulges and protrusions, thereby improving the accuracy of measurement and quality monitoring, and ensuring that the quality of the copper clad laminate 10 in the production process is fully controlled.

[0061] According to an optional embodiment, a guide surface 123 is provided between the recessed groove 122 and the bonding surface 121; in the conveying direction of the copper clad laminate 10, the included angle between the guide surface 123 and the first plane is an acute angle. The guide surface 123 can effectively guide the bulge position on the surface of the copper clad laminate 10 to move to the bonding surface 121, thereby preventing the copper clad laminate 10 from being stuck or blocked during the conveying process due to the bulge or protrusion.

[0062] Specifically, during the transportation of the copper clad laminate 10, when the bulge first enters the recessed groove 122, the bulge will be contained by the recessed groove 122, and the surface of the copper clad laminate 10 will remain flat. As the copper clad laminate 10 continues to be transported, the bulge may move from the recessed groove 122 to the notch area. If there is no proper guidance at the notch, the bulge may be stuck at the notch of the recessed groove 122, causing the copper clad laminate 10 to be obstructed during transportation.

[0063] To avoid this situation, the design of the guide surface 123 in this embodiment plays a key role. The guide surface 123 is designed with an acute angle with the first plane, so that the bulge can slide smoothly along the guide surface 123 during movement, preventing the bulge from getting stuck with the notch of the recessed groove 122. The function of the guide surface 123 is to provide an effective path so that the bulge can move smoothly to the fitting surface 121, thereby avoiding the stuck phenomenon and ensuring that the copper clad laminate 10 can be smoothly transported.

[0064] Through the cooperation of the guide surface 123 and the recessed groove 122, not only the smooth conveying process of the copper clad laminate 10 is ensured, but also the conveying resistance caused by bulges or protrusions can be effectively reduced, and the stability and reliability of the overall system can be improved, thereby providing a flat and stable surface for subsequent laser measurement.

[0065] Reference Figure 1 , Figure 2 According to an optional embodiment, the conveyor rack 100 is provided with a negative pressure cleaning mechanism 130 to remove dust particles on the surface of the copper clad laminate 10. The negative pressure cleaning mechanism 130 includes a negative pressure housing 131. The negative pressure housing 131 extends and distributes along the width direction of the copper clad laminate 10, and the extension length of the negative pressure housing 131 in the width direction of the copper clad laminate 10 is not greater than the width of the copper clad laminate 10. The negative pressure housing 131 is provided with an inlet 131a and an outlet 131b. The flow area of ​​the outlet 131b is greater than the flow area of ​​the inlet 131a, so that the negative pressure housing 131 is adsorbed on the surface of the copper clad laminate 10, and the outlet 131b is connected to a negative pressure device. The flow area of ​​the outlet 131b is greater than the flow area of ​​the inlet 131a, so that the negative pressure housing 131 can be connected to the negative pressure device through the outlet 131b to form a negative pressure adsorption effect to remove dust and particles on the surface of the copper clad laminate 10.

[0066] Specifically, the negative pressure device extracts the gas in the negative pressure housing 131 through the outlet 131b, and the outside air enters through the inlet 131a. A filtering structure, such as a filter cotton plug, can be provided at the inlet 131a to prevent large particles in the air from entering the negative pressure housing 131. Through the effect of negative pressure, the negative pressure housing 131 can be tightly adsorbed on the surface of the copper clad laminate 10, thereby removing dust and particles attached to the copper clad laminate 10 and ensuring the surface of the copper clad laminate 10 is clean. This cleaning process not only helps to improve the accuracy of subsequent laser measurement, but also prevents dust from adversely affecting the storage and subsequent processing of the copper clad laminate 10.

[0067] In order to enhance the cleaning effect, a negative pressure port that can fit the surface of the copper clad laminate 10 is provided on the side of the negative pressure housing 131 facing the copper clad laminate 10, and a seal, such as a sealing rubber, is provided at the negative pressure port to ensure that the negative pressure housing 131 can be firmly adsorbed on the surface of the copper clad laminate 10. Considering the smooth transmission of the copper clad laminate 10, the sealing rubber should be made of hard rubber material to reduce friction. In addition, a lubricating layer such as Teflon can be coated on the surface of the sealing rubber to further reduce friction and ensure that the copper clad laminate 10 is stable and smooth during the transmission process.

[0068] Through this design, the negative pressure cleaning mechanism 130 can not only efficiently remove dust particles on the surface of the copper clad laminate 10, but also effectively avoid measurement errors caused by surface contamination, further improving the quality control accuracy of the copper clad laminate 10 during the production process.

[0069] Reference Figure 1 , Figure 2 According to an optional embodiment, the negative pressure shell 131 is used to be adsorbed on the surface of the copper clad laminate 10, and the negative pressure in the cavity formed between the negative pressure shell 131 and the copper clad laminate 10 is greater than the rupture pressure of the copper film on the surface of the copper clad laminate 10. When delamination occurs in the copper clad laminate 10, the negative pressure shell 131 can adsorb the surface of the copper clad laminate 10 through negative pressure, and when the pressure increases, the copper film on the surface of the copper clad laminate 10 is stretched and bulged to a certain extent. With the continuous action of the negative pressure, the copper film will eventually rupture locally, thereby clearly exposing the delamination area. This rupture phenomenon helps to identify defects of the copper clad laminate 10 in a timely manner, avoid the use of copper clad laminates 10 with delamination problems in subsequent production, thereby reducing the risk of damage to electronic components and improving the quality of the final product.

[0070] According to an optional embodiment, the number of negative pressure housings 131 is two, and the copper clad laminate 10 includes a first surface and a second surface relative to each other. One negative pressure housing 131 is used to be adsorbed on the first surface, and the other negative pressure housing 131 is used to be adsorbed on the second surface, and the two negative pressure housings 131 do not overlap in the direction perpendicular to the first plane. The two negative pressure housings 131 are respectively located on the first surface and the second surface of the copper clad laminate 10. By staggering the two negative pressure housings 131 on the perpendicular first plane, damage to the copper clad laminate 10 caused by excessive local negative pressure during the negative pressure cleaning process can be effectively avoided. Specifically, the two negative pressure housings 131 do not overlap in the direction perpendicular to the first plane. By designing the staggered positions, it can be ensured that the negative pressure effect is evenly distributed, and a single position is prevented from being subjected to excessive negative pressure, thereby reducing the risk of damage to the copper clad laminate 10. This design not only ensures that the copper clad laminate 10 is not damaged during the cleaning process, but also effectively identifies and handles potential quality problems, further improving production efficiency and quality control levels.

[0071] Reference Figure 1 , Figure 2In some schemes, a negative pressure cleaning mechanism 130, a laminating unit 120 and a laser measuring device 210 are sequentially arranged along the transmission direction of the copper clad laminate 10. In this embodiment, the negative pressure cleaning mechanism 130 is located on the upstream side of the copper clad laminate 10 in the transmission direction, the laminating unit 120 is located in the middle position, and the laser measuring device 210 is located on the downstream side of the copper clad laminate 10 in the transmission direction. This arrangement sequence can ensure that before the copper clad laminate 10 reaches the laser measuring device 210, the dust and impurities on the surface are first removed by the negative pressure cleaning mechanism 130 to prevent these impurities from affecting the accuracy of laser measurement. After the surface of the copper clad laminate 10 is cleaned by negative pressure cleaning, it enters the laminating unit 120 to ensure that the copper clad laminate 10 remains stable during the transmission process and avoids measurement errors caused by surface unevenness or protrusions. Finally, the cleaned and laminating copper clad laminate 10 reaches the laser measuring device 210 for high-precision thickness detection to ensure the measurement accuracy and data accuracy of the entire process.

[0072] The advantage of this sequential arrangement is that, through the cooperation of negative pressure cleaning and the laminating portion 120, the measurement error caused by factors such as surface dirt, bulging or unevenness can be effectively reduced, thereby improving the reliability of the final measurement result. In practical applications, this structural design can provide effective protection for the production process with high precision requirements, especially when the production speed is fast and the surface of the copper clad laminate 10 is easily contaminated, it can ensure that each copper clad laminate 10 can be fully cleaned and stabilized before measurement, thereby avoiding the overall quality of the production line being affected by surface defects.

[0073] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An online automatic thickness measurement device for copper clad laminate, characterized in that: include: A conveying frame (100), wherein a conveying device (110) is provided on the conveying frame (100) to convey the copper-clad laminate (10); A measuring frame (200), wherein a laser measuring device (210) is arranged on the measuring frame (200) to measure the thickness of the copper-clad laminate (10); The conveying frame (100) and the measuring frame (200) are independently arranged, and the measuring frame (200) is movable relative to the conveying frame (100).

2. The on-line automatic thickness measuring device for copper clad laminate according to claim 1 is characterized in that: The conveying device (110) comprises a first roller (111) and a second roller (112) rotatably arranged on the conveying frame (100), the first roller (111) and the second roller (112) being used to press the copper-clad laminate (10) between the first roller (111) and the second roller (112), and at least one of the first roller (111) and the second roller (112) can be actively rotated; And / or, the conveying device (110) includes a third roller (113) and a fourth roller (114) rotatably arranged on the conveying frame (100), the third roller (113) and the fourth roller (114) are used to press the copper clad laminate (10) between the third roller (113) and the fourth roller (114), and the third roller (113) and the fourth roller (114) are both passive rotating rollers, so as to drive the third roller (113) and the fourth roller (114) to rotate when the copper clad laminate (10) passes between the third roller (113) and the fourth roller (114).

3. The on-line automatic thickness measuring device for copper clad laminate according to claim 2 is characterized in that: At least one of the third roller (113) and the fourth roller (114) is provided with a damping structure to increase the rotation resistance of at least one of the third roller (113) and the fourth roller (114); And / or, the first roller (111) and the second roller (112) form a driving roller group, the third roller (113) and the fourth roller (114) form a passive roller group, the laser measuring device (210) is located in a region between the driving roller group and the passive roller group, and the laser measuring device (210) is arranged close to the driving roller group or the passive roller group.

4. The on-line automatic thickness measuring device for copper clad laminate according to claim 1 is characterized in that: The laser measuring device (210) comprises a first laser displacement sensor (211) and a second laser displacement sensor (212) arranged on the measuring frame (200), one of the first laser displacement sensor (211) and the second laser displacement sensor (212) being located in a region below the copper clad laminate (10), and the other being located in a region above the copper clad laminate (10), and the first laser displacement sensor (211) and the second laser displacement sensor (212) being coaxially arranged in a direction perpendicular to a first plane.

5. The on-line automatic thickness measuring device for copper clad laminate according to claim 1 is characterized in that: The measuring frame (200) comprises a first frame (220) and a second frame (230), wherein the first frame (220) is located on one side of a copper-clad laminate (10), and the second frame (230) is located on the other side of the copper-clad laminate (10), and one of the first frame (220) and the second frame (230) is provided with a laser emitting component (221), and the other is provided with a laser receiving component (231), wherein the laser emitting component (221) is used to emit a laser so as to be received by the laser receiving component (231); in the width direction of the copper-clad laminate (10), the laser beam emitted by the laser emitting component (221) is parallel to and in contact with the surface of the copper-clad laminate (10).

6. The device for automatically measuring the thickness of a copper-clad laminate online according to claim 5, characterized in that: The conveyor frame (100) is provided with a bonding portion (120), and the bonding portion (120) has a bonding surface (121) for bonding with the surface of the copper clad laminate (10), so that the copper clad laminate (10) is bonded with the bonding surface (121) during transportation, and the laser emitting component (221) and the laser receiving component (231) are located on both sides of the copper clad laminate (10) bonded with the bonding surface (121).

7. The on-line automatic thickness measuring device for copper clad laminate according to claim 6 is characterized in that: The bonding portion (120) is provided with a recessed groove (122), the recessed groove (122) is recessed in a direction perpendicular to the first plane, and the recessed groove (122) passes through the bonding portion (120) in a width direction of the copper clad laminate (10), the laser emitting assembly (221) comprises a first laser emitter (221a) and a second laser emitter (221b), the light beam emitted by the first laser emitter (221a) is located in a region of the copper clad laminate (10) corresponding to the recessed groove (122), and the light beam emitted by the second laser emitter (221b) is located in a region outside the region of the copper clad laminate (10) corresponding to the recessed groove (122).

8. The on-line automatic thickness measuring device for copper clad laminate according to claim 7 is characterized in that: A guide surface (123) is provided between the recessed groove (122) and the bonding surface (121); in the conveying direction of the copper-clad laminate (10), the included angle between the guide surface (123) and the first plane is an acute angle.

9. The on-line automatic thickness measuring device for copper clad laminate according to claim 1, characterized in that: The conveyor rack (100) is provided with a negative pressure cleaning mechanism (130) to remove dust particles on the surface of the copper clad laminate (10). The negative pressure cleaning mechanism (130) comprises a negative pressure shell (131). The negative pressure shell (131) is extended and distributed along the width direction of the copper clad laminate (10), and the extension length of the negative pressure shell (131) in the width direction of the copper clad laminate (10) is not greater than the width of the copper clad laminate (10). The negative pressure shell (131) is provided with an inlet (131a) and an outlet (131b). The flow area of ​​the outlet (131b) is greater than the flow area of ​​the inlet (131a), so that the negative pressure shell (131) is adsorbed on the surface of the copper clad laminate (10). The outlet (131b) is connected to a negative pressure device.

10. The on-line automatic thickness measuring device for copper clad laminate according to claim 9, characterized in that: The negative pressure housing (131) is used to be adsorbed on the surface of the copper-clad laminate (10), and the negative pressure in the cavity formed between the negative pressure housing (131) and the copper-clad laminate (10) is greater than the rupture pressure of the copper film on the surface of the copper-clad laminate (10); And / or, there are two negative pressure shells (131), the copper-clad board (10) includes a first surface and a second surface relative to each other, one of the negative pressure shells (131) is used to be adsorbed on the first surface, and the other negative pressure shell (131) is used to be adsorbed on the second surface, and the two negative pressure shells (131) do not overlap in a direction perpendicular to the first plane.

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