Circuit board pressing equipment and circuit board pressing process

Abstract

The invention discloses circuit board pressing equipment and a circuit board pressing process. The pressing equipment comprises a pressing unit; the detection unit comprises a first detection module and a second detection module, the first detection module is used for acquiring first image information of the kraft paper, the first image information is deformation image parameters of the kraft paper, the second detection module is used for acquiring second image information of the kraft paper, and the second image information comprises surface particulate matter image information of the kraft paper; the wrinkle removing unit comprises a transfer device, a softening device, a wrinkle removing roller set and a drying device, the softening device is used for softening the kraft paper and eliminating warping angles of the kraft paper, the drying device is used for drying the kraft paper subjected to wrinkle removing, and the transfer device can transfer the kraft paper with wrinkles to the softening device according to the first image information; kraft paper is output from the softening device and then conveyed to the drying device; and the cleaning unit can remove particulate matters on the kraft paper according to the second image information. The pressing process is applied to the pressing equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit board production, in particular to a circuit board pressing equipment and a circuit board pressing process. BACKGROUND

[0002] In the pressing process of a multilayer circuit board, kraft paper is placed below the bottom layer and above the top layer of the circuit board as a buffer medium. As a key auxiliary material in the pressing process, the performance of kraft paper directly affects the pressing quality of the circuit board. In actual production, the kraft paper often has surface contamination and structural deformation problems when it is transported to the pressing equipment. Surface contaminants include dust, particles and other impurities, which can form white spots and other defects on the surface of the circuit board during the pressing process. At the same time, kraft paper is prone to deformation such as wrinkles and angles during transportation and storage, which can cause uneven pressure distribution during pressing and affect the interlayer bonding strength and dimensional stability of the circuit board. The existing technology lacks effective detection and processing means for the quality of kraft paper, and cannot timely discover and solve the surface contamination and structural deformation problems of kraft paper before pressing, which affects the quality of the circuit board after pressing. In addition, the existing equipment has low processing efficiency for kraft paper with problems, often requiring manual intervention, which not only increases production costs but also affects production efficiency. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a circuit board pressing equipment and a circuit board pressing process, wherein the circuit board pressing process applies the pressing equipment provided by the present application, which has the advantages of improving the pressing quality of the circuit board, reducing surface defects, improving production efficiency and reducing the cost of manual intervention.

[0004] In a first aspect, a circuit board pressing equipment according to an embodiment of the present application comprises: a pressing unit for carrying a circuit board to be pressed and kraft paper; a detection unit arranged on the pressing unit, the detection unit comprising a first detection module and a second detection module, the first detection module being configured to acquire first image information of the kraft paper, the first image information being deformation image parameters of the kraft paper, and the second detection module being configured to acquire second image information of the kraft paper, the second image information comprising surface particle image information of the kraft paper; a wrinkle removal unit comprising a transfer device, a softening device, a wrinkle removal roller set and a drying device, the softening device being configured to soften the kraft paper and eliminate the angle of the kraft paper, the drying device being configured to dry the kraft paper after the wrinkle removal, and the transfer device being configured to transfer the kraft paper with wrinkles to the softening device according to the first image information, and the kraft paper is transported to the drying device after being output from the softening device and winding around the wrinkle removal roller set; The cleaning unit is capable of removing the particles on the kraft paper according to the second image information.

[0005] According to the circuit board pressing device, the following advantages are achieved: the circuit board and the kraft paper are carried by the pressing unit, and the deformation and the surface particles of the kraft paper are detected by the detection unit, so that the wrinkles, the angle and the foreign matter defects are accurately identified. The first detection module of the detection unit captures the wrinkles and the angle of the kraft paper by the deformation image parameters, and the second detection module locates the contaminants by the surface particle image information, so that the defect classification detection mechanism is formed. The wrinkles are removed by the wrinkles removing unit according to the deformation data of the first detection module, and the wrinkles and the angle are removed by the softening device. The wrinkles are flattened by the wrinkles removing roller group, and the flatness of the kraft paper is recovered by the drying device, so that the wrinkles and the angle are cooperatively processed. The cleaning unit removes the foreign matters on the surface of the kraft paper according to the particle information of the second detection module, so that the particles are prevented from being embedded into the circuit board during the pressing process. The units are linked by the detection data to perform corresponding processing actions, so that the kraft paper is in the state of no wrinkles, no angle and no contaminants before the pressing, and the yield of the circuit board pressing is improved.

[0006] According to the circuit board pressing device, the first detection module is any one of a laser scanning device and a structured light scanning device.

[0007] According to the circuit board pressing device, the first detection module is a laser scanning device, the laser scanning device includes a laser emitter and a laser receiver, the laser emitter emits a detection signal along the normal direction of the surface of the kraft paper, and the laser receiver is used to receive the light beam emitted by the laser emitting assembly.

[0008] According to the circuit board pressing device, the laser scanning device further includes a moving mechanism, the moving mechanism includes a first driving member and a moving seat connected to the output end of the first driving member, the laser emitter and the laser receiver are respectively installed at two ends of the moving seat, and the first driving member can drive the moving seat to move along the radial direction of the kraft paper, so that the laser emitter and the laser receiver can synchronously move and scan the surface of the kraft paper.

[0009] According to the circuit board pressing device, the first detection module is a structured light scanning device, the structured light scanning device includes a structured light emitter and a CCD camera, the structured light emitter is used to project a grating on the surface of the kraft paper, and the CCD camera is used to acquire the surface deformation image of the kraft paper after the grating is projected.

[0010] According to the circuit board pressing device, the cleaning unit comprises a dust sticking roller and an ion wind knife, the ion wind knife is arranged on one side of the dust sticking roller, the dust sticking roller comprises a roller body and a layer, a conductive silica gel layer is wrapped on the circumferential outer wall of the roller body, and the dust sticking roller and the ion wind knife are used for removing the particulate matters on the surface of the kraft paper.

[0011] According to the circuit board pressing device, the softening device comprises a second bearing table, an ironing mechanism and a corner removing mechanism, the second bearing table is used for supporting the kraft paper to be removed of wrinkles, the ironing mechanism is arranged above the bearing table, the corner removing mechanism is arranged on the second bearing table, the corner removing mechanism is used for removing the corners of the kraft paper, and the ironing mechanism is used for softening and ironing the kraft paper after the corners are removed.

[0012] According to the circuit board pressing device, the corner removing mechanism comprises a suction accessory, a translation assembly and a flattening piece, the suction accessory is arranged above the second bearing table, the suction accessory is used for sucking the corners on the kraft paper, the flattening piece is connected with the translation assembly, the translation assembly can drive the flattening piece to move on the second bearing table to expand the corners on the kraft paper, and the flattening piece is a round rod.

[0013] In a second aspect, the circuit board pressing process is applied to the circuit board pressing device, and comprises the following steps. S1: loading the bottom kraft paper, the bottom kraft paper is fixed on the first bearing table; S2: acquiring image information for the first time, the first detection module and the second detection module acquire first image information and second image information of the kraft paper located at the bottom of the circuit board, the first image information is a deformation image parameter of the kraft paper, and the second image information is surface particulate matter image information of the kraft paper; S3: processing the kraft paper, according to the first image information, if the kraft paper has wrinkles or corners, the kraft paper is replaced, the wrinkle removing unit removes the wrinkles and corners of the replaced kraft paper, and if the kraft paper does not have wrinkles or corners, according to the second image information, the cleaning unit removes the particulate matters on the kraft paper; S4: stacking the circuit board to be pressed on the bottom kraft paper; S5: loading the top kraft paper, the top kraft paper is fixed on the top circuit board; S6: acquiring image information for the second time, the first detection module and the second detection module acquire first image information and second image information of the kraft paper located at the top of the circuit board, the first image information is a deformation image parameter of the kraft paper, and the second image information is surface particulate matter image information of the kraft paper; S7: repeating S3; S8: pressing the circuit board.

[0014] According to the circuit board pressing process of the embodiment of the present application, at least the following beneficial effects are achieved: the circuit board pressing process provided by the present application ensures the pressing quality by detecting and processing the wrinkles, the corner angles and the particle problems of the kraft paper in stages. After the bottom kraft paper is fed, the deformation parameters and the surface particle information are obtained by the first detection module and the second detection module respectively, and it is determined whether the kraft paper needs to be replaced or cleaned, so as to avoid the influence of wrinkles or particles on the pressing effect. If there are wrinkles or corner angles, the replaced kraft paper is subjected to softening, flattening and drying treatment by the wrinkle removing unit to eliminate the defects. If there are no wrinkles or corner angle defects, only the surface has particles, and the particles are directly removed by the cleaning unit. After the plates are stacked, the kraft paper located on the top layer of the circuit board is subjected to repeated detection and processing, so as to ensure that the kraft papers located on the bottom layer and the top layer of the circuit board meet the pressing requirements. Through the two image detection and processing steps, the defects of the kraft paper are investigated, and the circuit board pressing problem caused by the quality problem of the kraft paper is systematically solved.

[0015] According to the circuit board pressing device and process of the embodiment of the present application, the softening device comprises a second bearing table, an ironing mechanism and a corner angle removing mechanism. The second bearing table is used for supporting the kraft paper to be removed from wrinkles. The ironing mechanism is arranged above the second bearing table. The corner angle removing mechanism is arranged on the second bearing table and is used for eliminating the corner angle of the kraft paper. The ironing mechanism is used for softening and ironing the kraft paper after the corner angle is eliminated. S3: According to the first image information, the wrinkle removing unit removes the wrinkles and corner angles of the replaced kraft paper, including that after the corner angle removing mechanism removes the corner angle of the kraft paper, the ironing mechanism softens and irons the kraft paper after the corner angle is removed.

[0016] Additional aspects and advantages of the present application will be described in part in the following description, will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the following drawings, in which: Figure 1 FIG. 1 is a structural schematic diagram of a circuit board pressing device according to an embodiment of the present application; Figure 2 FIG. 2 is a schematic diagram of the working principle of a flattening piece and a suction accessory according to an embodiment of the present application; Figure 3 FIG. 3 is a flowchart of a circuit board pressing process according to an embodiment of the present application.

[0018] DETAILED DESCRIPTION Kraft paper 1; First bearing table 100; The first detection module 200; the laser transmitter 210; the laser receiver 220; the moving seat 230; The second detection module 300; The transfer device 400; The softening device 500; the second bearing table 510; the supporting plate 512; the vacuum adsorption channel 511; the ironing mechanism 520; the suction accessory 530; the flattening piece 540; the translation assembly 550; The cleaning unit 600; the dust sticking roller 610; the ion wind knife 620; The wrinkle removing roller group 700; The drying device 800. DETAILED DESCRIPTION

[0019] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0020] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0021] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0022] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0023] Reference Figures 1 to 2The embodiment of the present application provides a circuit board pressing equipment, which comprises a pressing unit, a detection unit, a wrinkle removing unit and a cleaning unit 600. The pressing unit is provided with a first bearing table 100 for bearing a circuit board and kraft paper; the detection unit comprises a first detection module 200 and a second detection module 300, which respectively acquire deformation image parameters and surface particle image information of the kraft paper 1; the wrinkle removing unit is provided with a transfer device 400, a softening device 500, a wrinkle removing roller group 700 and a drying device 800, and the kraft paper with defects is processed in a targeted manner according to the detection data; and the cleaning unit 600 removes foreign matters based on the particle information.

[0024] It can be understood that when the kraft paper 1 located at the bottom layer of the circuit board is placed on the first bearing table 100, or the kraft paper located at the top layer of the circuit board is placed on the top layer of the circuit board, the first detection module 200 scans the surface to generate a three-dimensional deformation map, and identifies the position and degree of the wrinkle and the angle. The second detection module 300 synchronously shoots a surface image, and locates a particle distribution area through an image processing algorithm. If the wrinkle or the angle is detected, the transfer device 400 moves the kraft paper with defects to the softening device 500. If the kraft paper 1 has the wrinkle and the angle, the softening device eliminates the angle of the kraft paper 1 or the angle, and then softens the kraft paper with the eliminated angle. After being heated and softened, the kraft paper is mechanically flattened by the wrinkle removing roller group 700, and finally the flatness of the paper is recovered by the drying device 800. For the detected particles, the cleaning unit 600 is started to remove the particles on the kraft paper. The processed kraft paper can be reused to avoid waste. Alternatively, the processed kraft paper can be transferred to the pressing unit by the transfer device 400 to re-enter the pressing process, or the processed kraft paper can be transferred to a dustproof box by the transfer device 400 to be stored to wait for the next reuse.

[0025] The pressing equipment provided by the present application can effectively eliminate the uneven pressing problem caused by the kraft paper wrinkle and the angle, and remove the surface particles to avoid the pressing white spot defect. The synergistic effect of the detection unit and the processing unit ensures that the kraft paper reaches the best state before pressing, improves the surface flatness and insulation performance of the circuit board, and thus improves the yield of the pressing process.

[0026] According to some other embodiments of the present application, the first detection module 200 can be a laser scanning device. Specifically, the laser scanning device comprises a moving mechanism, a laser emitter 210 and a laser receiver 220. The moving mechanism comprises a first driving member and a moving seat 230 connected to the output end of the first driving member. The laser emitter 210 and the laser receiver 220 are respectively installed at the two ends of the moving seat 230. The first driving member can drive the moving seat 230 to move along the radial direction of the kraft paper, so that the laser emitter 210 and the laser receiver 220 can move synchronously and scan the surface of the kraft paper. The laser emitter 210 and the laser receiver 220 are arranged above the first bearing table 100. The laser emitter 210 emits a detection signal along the normal direction of the surface of the kraft paper. The laser receiver 220 is used to receive the light beam emitted by the laser emitter.

[0027] Specifically, when the kraft paper is placed on the first bearing table 100, the laser beam is projected on the surface of the kraft paper at a preset angle. After the first driving member receives the control signal, the rotary motion is converted into the linear displacement of the moving seat 230 through the ball screw. The laser emitter 210 and the receiver maintain a fixed distance between the two ends of the moving seat 230 and move synchronously along the width direction of the kraft paper. During the movement, the laser beam continuously projects onto the surface of the kraft paper, and the laser receiver 220 collects the reflected light signal in real time. Through the preset moving speed and scanning interval parameters, the detection system of the control unit can continuously obtain the surface deformation data at different positions. The moving stroke is automatically adjusted according to the size of the kraft paper to ensure that the detection area is covered without omission. After the detection is completed, the moving seat 230 is automatically reset to the initial position to wait for the next working cycle.

[0028] It can be understood that, in the ideal flat state, the receiver will receive a complete and uniform light signal distribution. If the kraft paper has wrinkles, the surface deformation will cause the laser beam to scatter or deviate from the path, and the light intensity distribution detected by the receiver will change characteristically. The control unit can accurately calculate the deformation parameters such as the depth and area of the wrinkles by comparing the preset standard parameters with the real-time detection data. The opposite arrangement of the laser emitter 210 and the laser receiver 220 forms a stable optical detection field, which ensures that the detection signal covers the entire working surface of the kraft paper and avoids the edge blind area problem existing in the traditional lateral detection. The present application realizes the automatic and comprehensive detection of the surface deformation of the kraft paper by using the first detection module 200, and solves the problem of low detection efficiency caused by manual adjustment. The laser scanning device completes continuous scanning under the driving of the moving mechanism, which can cover the entire kraft paper without interrupting the detection process, thereby effectively improving the continuity of the detection operation and the data acquisition efficiency. The synchronous movement mechanism ensures the constant relative position of the emitting end and the receiving end, avoids the detection error caused by the displacement deviation of the components, and ensures the accuracy of the deformation detection data.

[0029] The second detection module 300 is an image acquisition device, and a CCD camera can be specifically selected.

[0030] According to some other embodiments of the present application, the first detection module 200 is a structured light scanning device, which includes a structured light emitter and a CCD camera arranged above the first bearing table 100. The structured light emitter is used to project a grating onto the surface of the kraft paper, and the CCD camera is used to acquire a surface deformation image of the kraft paper after the grating is projected.

[0031] It can be understood that the structured light emitter projects a preset grating pattern onto the surface of the kraft paper. When the kraft paper has wrinkles or warping, the grating fringes will be locally distorted or displaced due to the surface concave-convex. The CCD camera shoots the surface of the kraft paper covered by the grating at a fixed angle to acquire an image containing deformation information. The detection system of the control unit can reconstruct the three-dimensional deformation distribution data of the surface of the kraft paper by analyzing the phase shift and spatial frequency change of the grating fringes, so as to quantitatively evaluate the degree and position of the wrinkles and provide accurate coordinate parameters for subsequent wrinkle removal operations. That is, when it is detected that the grating fringes have a phase mutation exceeding a threshold value in a specific area, it is determined that there is a wrinkle defect to be processed in the area. According to the present application, the non-contact structured light scanning can realize full-field deformation detection with millimeter-level precision without contacting the material, avoid paper deformation caused by mechanical contact, accurately identify the slight deformation of the surface of the kraft paper caused by wrinkles or warping, and avoid uneven stress distribution in the pressing process due to missed detection. The wrinkle removal unit can perform targeted treatment on the defect area according to the detection result, eliminate the white spot defects of the circuit board caused by the unevenness of the kraft paper, and improve the yield of the pressing.

[0032] According to some embodiments of the present application, the cleaning unit 600 includes a dust sticking roller 610 and an ion wind knife 620 arranged on one side of the dust sticking roller 610. The dust sticking roller 610 includes a roller body and a conductive silica gel layer covering the circumferential outer wall of the roller body. The dust sticking roller 610 and the ion wind knife 620 are used to remove particulate matter on the surface of the kraft paper.

[0033] It can be understood that when the detection unit detects that the kraft paper is wrinkle-free or warped, and only particles exist on the surface, the cleaning unit 600 cleans the surface of the kraft paper according to the instruction. Among them, the surface of the dust sticking roller 610 is coated with a conductive silicone layer, when the conductive silicone layer contacts the surface of the kraft paper, the adhesion of the silicone material directly adsorbs large particle pollutants such as metal debris and fiber dust, and the conductive property forms an electrostatic discharge path between the roller body and the kraft paper, avoiding the retention of particles due to electrostatic adsorption. Further, the ion wind knife 620 is arranged on one side of the dust sticking roller 610, and by releasing a high-speed airflow containing positive and negative ions, on the one hand, it blows off micron-sized particles attached to the surface of the kraft paper, and on the other hand, it neutralizes the static charge generated on the surface of the kraft paper due to friction, eliminating the electrostatic adsorption effect. The dust sticking roller 610 and the ion wind knife 620 form a dual cleaning mechanism of physical adhesion and ion flushing, covering the pollution removal needs of different particle size ranges. Among them, the dust sticking roller 610 and the ion wind knife 620 are both installed on the translation device and are moved synchronously on the kraft paper by the translation device. Through the synergistic effect of the conductive silicone layer and the ion wind knife 620, the application can simultaneously remove large particle pollutants and micron-sized particles adsorbed by static electricity on the surface of the kraft paper, avoid the particles being pressed into the board during the pressing process of the circuit board to form white spot defects, and improve the surface quality of the circuit board.

[0034] According to some embodiments of the application, the softening device 500 comprises a second bearing table 510 for supporting the kraft paper to be removed from the wrinkles, an ironing mechanism 520 arranged above the second bearing table 510, and a corner removing mechanism arranged on the second bearing table 510, the corner removing mechanism is used to eliminate the corners of the kraft paper, and the ironing mechanism 520 is used to soften and iron the kraft paper after the corners are eliminated.

[0035] Specifically, the corner removing mechanism comprises a suction accessory 530, a translation assembly 550 and a flattening piece 540, the suction accessory 530 is arranged above the second bearing table 510, and the suction accessory 530 is used to suck the corners on the kraft paper, the flattening piece 540 is connected with the translation assembly 550, and the translation assembly 550 can drive the flattening piece 540 to move on the second bearing table 510 to unfold the corners on the kraft paper. Among them, the ironing mechanism 520 comprises a steam heating plate and a hydraulic assembly, and the hydraulic assembly can drive the steam heating plate to abut on the kraft paper.

[0036] It can be understood that after the kraft paper is placed on the second supporting table 510, the suction accessory 530 first suctions and pulls up the local warped area of the edge of the paper and fixes it to avoid displacement deviation during the flattening process. The suction accessory 530 can be a vacuum suction cup, and the suction accessory 530 can be installed on a three-axis moving device (not shown in the figure) or the suction accessory 530 is installed on a six-degree-of-freedom mechanical arm (not shown in the figure), and the suction accessory 530 is moved to the corresponding warped position according to the first image information. Then the flattening piece 540 is driven by the translation assembly 550 to move in the plane direction, and the flattening piece 540 moves under the continuous driving of the translation assembly 550, cooperates with the suction accessory 530 to flatten the warped area to be in close contact with the surface of the second supporting table 510. It should be noted that the suction force of the suction accessory 530 on the kraft paper warped angle is less than the pushing force of the flattening piece 540 on the kraft paper, so as to avoid tearing and damage of the kraft paper, and when the flattening piece 540 continuously moves to flatten the warped part of the kraft paper, the suction accessory 530 also moves in the same direction synchronously.

[0037] Alternatively, after the suction accessory 530 is moved to the corresponding warped position according to the first image information, the suction accessory 530 suctions and pulls up the warped part of the kraft paper to form a gap between the warped part and the main body of the kraft paper, and the angle of the gap is greater than the diameter of the flattening piece 540 so that the flattening piece 540 can be smoothly inserted into the gap. The translation assembly 550 drives the flattening piece 540 to move in the plane direction and inserts it into the gap, and the flattening piece 540 moves under the continuous driving of the translation assembly 550 to push the warped part to flip towards the second supporting table 510, so that the warped area is flattened to be in close contact with the surface of the second supporting table 510.

[0038] After the kraft paper is flattened, it enters the ironing process stage, and the steam heating plate uniformly heats the whole paper to fully soften the fiber structure, and the hydraulic pressing plate synchronously applies vertical pressure to force the softened kraft paper to recover to a flat state under the action of heat and pressure. It should be noted that the moving path of the flattening piece 540 is adjusted according to the size of the warped angle. It should be noted that when the flattening piece 540 flattens the warped part of the kraft paper to be in close contact with the second supporting table 510, the translation assembly 550 drives the flattening piece 540 to move to the ironing range outside the ironing mechanism 520 to avoid interference between the flattening piece 540 and the steam heating plate. Further, the translation assembly 550 is provided with a lifting cylinder, and the flattening piece 540 is arranged on the lifting cylinder, and the flattening piece 540 and the lifting cylinder are rotatably connected, and the flattening piece 540 is driven by the lifting cylinder to approach the second supporting table 510.

[0039] After the kraft paper is softened and flattened, it is horizontally conveyed to the wrinkle removing roller group 700, and after passing through the wrinkle removing roller group 700, it is horizontally conveyed to the drying device 800 for drying. The drying device 800 can be a voltage hot plate.

[0040] The scheme avoids the influence of superimposed composite deformation on the processing effect by a phased processing mechanism, eliminates local warpage first and then implements overall ironing, shortens the single processing cycle, realizes the synchronous elimination of kraft paper creases and warpage, effectively prevents the uneven pressing of the circuit board caused by local deformation, and significantly reduces the occurrence rate of white spot defects on the circuit board surface.

[0041] Preferably, the flattening piece 540 is a round rod. When the cylindrical outer surface of the round rod contacts the warpage area of the kraft paper, the curved surface contact characteristic of the round rod avoids the cutting effect of sharp edges on the paper, and can avoid scratching the paper surface or tearing the paper.

[0042] According to some embodiments of the present application, the first bearing table 100 and the second bearing table 510 are structurally identical, specifically, the first bearing table 100 and the second bearing table 510 each include a supporting plate 512 and a vacuum suction channel 511 arranged on the supporting plate 512, and the vacuum suction channels 511 are uniformly distributed on the supporting plate 512, wherein the vacuum suction channels 511 are connected with an external negative pressure device. The kraft paper 1 is fixed by vacuum negative pressure suction, which can avoid damage to the kraft paper compared with mechanical fixation.

[0043] Further, before the kraft paper is placed on the first bearing table 100, the first bearing table 100 can also be subjected to surface particulate matter detection by the second detection module 300, and if particulate matter exists on the first bearing table 100, the first bearing table 100 can be subjected to surface cleaning by the cleaning unit 600, which can not only reduce the cost of the equipment, but also further ensure the pressing quality of the circuit board.

[0044] As shown in Figure 3 The present application also provides a circuit board pressing process, which is realized by using the above-mentioned circuit board pressing equipment, specifically including the following steps: S1: bottom kraft paper loading, the bottom kraft paper is fixed on the first bearing table 100; S2: first image information acquisition, the first detection module 200 and the second detection module 300 acquire first image information and second image information of the kraft paper located at the bottom of the circuit board, respectively, the first image information is a deformation image parameter of the kraft paper, and the second image information is surface particulate matter image information of the kraft paper; S3: kraft paper processing, according to the first image information, if the kraft paper has creases or warpage, the kraft paper is replaced, the crease eliminating unit eliminates the creases and warpage of the replaced kraft paper, and if the kraft paper does not have creases or warpage, the cleaning unit 600 removes the particulate matter on the kraft paper according to the second image information; S4: board stacking, the circuit board to be pressed is stacked on the bottom kraft paper; S5: top kraft paper loading, the top kraft paper is fixed on the top circuit board; S6: Second time to obtain image information, the first detection module 200 and the second detection module 300 respectively obtain the first image information and the second image information of the kraft paper located on the top layer of the circuit board, the first image information is the deformation image parameter of the kraft paper, and the second image information is the surface particulate image information of the kraft paper; S7: Repeat S3; S8: Circuit board pressing.

[0045] It can be understood that, Figure 1 、 Figure 2 Combined Figure 3 As shown in FIG. 1, when the first kraft paper 1, i.e. the kraft paper 1 placed on the bottom of the bottom layer of the circuit board, is fixed on the first bearing table 100, the first detection module 200 obtains the first image information of the current kraft paper 1, and judges whether the current kraft paper 1 has defects, i.e. whether the current kraft paper 1 has wrinkles or warping, according to the first image information. If the surface of the current kraft paper 1 is complete and does not have wrinkles or warping, the second detection module 300 is started, the second image information of the current kraft paper 1 is obtained, and it is judged whether the surface of the current kraft paper 1 has particulate matter through the second image information. If the surface of the current kraft paper 1 is clean and does not have particulate matter, the pressing unit starts to stack the circuit board to be pressed on the kraft paper 1.

[0046] If the first detection module 200 detects that the current kraft paper 1 has wrinkles or warping, the transfer device 400 takes the current kraft paper 1 away from the first bearing table 100, and replaces a new kraft paper 1. The first detection module 200 and the second detection module 300 repeat the foregoing steps until the kraft paper 1 meets the pressing requirements. The replaced kraft paper 1 is transferred to the wrinkle removing unit by the transfer device 400 for wrinkle removing treatment, and the kraft paper 1 after completing the wrinkle removing treatment can be reused. When the quality of the replaced kraft paper 1 meets the pressing requirements, the pressing unit starts to stack the circuit board to be pressed on the kraft paper 1.

[0047] After the pressing unit starts to complete the stacking of the circuit board, the pressing unit stacks the second kraft paper 1 on the top of the top layer of the circuit board. At this time, the first detection module 200 and the second detection module 300 repeat the foregoing steps until the second kraft paper 1 meets the pressing requirements, and the pressing unit starts the pressing process. Similarly, the replaced second kraft paper 1 is also transported to the wrinkle removing unit by the transfer device 400 for wrinkle removing treatment.

[0048] After the laminating unit finishes the laminating of the circuit board, the laminating unit places the second kraft paper on the top of the top layer of the circuit board. At this time, the first detection module and the second detection module repeat the aforementioned steps until the second kraft paper meets the laminating requirements, and then the laminating unit starts the laminating process. Similarly, the replaced second kraft paper is also transported to the wrinkle removing unit by the transfer device for wrinkle removing treatment.

[0049] Beneficially, after the bottom layer of kraft paper is fixed, the deformation detection and the particle detection are performed synchronously. If a wrinkle or a corner is detected, the automatic replacement process is triggered, and the problem kraft paper is transferred to the wrinkle removing unit for softening and flattening treatment. If no deformation defect is detected, only the particles on the surface of the kraft paper are detected, and the cleaning unit 600 is started to remove the particles. After the laminating, the detection process and the treatment process of the kraft paper on the top layer of the circuit board are repeated to ensure that the kraft paper is in a flat and clean state. Through the phased detection and treatment mechanism, the quality problems of the kraft paper are eliminated before laminating, avoiding the generation of white spots on the circuit board after laminating due to uneven local stress or foreign matter embedded. The laminating quality decline problem caused by the existence of wrinkles, corners and surface particles of the kraft paper is effectively solved, the flatness and cleanliness of the kraft paper during the laminating process are ensured, the adverse phenomenon of white spots on the surface of the circuit board caused by kraft paper defects is avoided, and the laminating yield is improved.

[0050] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A circuit board press device characterized by comprising: The application relates to a kraft paper crease removing device. The device comprises a pressing unit for carrying a circuit board to be pressed and kraft paper, a detection unit arranged on the pressing unit, the detection unit comprising a first detection module and a second detection module, the first detection module being used for acquiring first image information of the kraft paper, the first image information being deformation image parameters of the kraft paper, the second detection module being used for acquiring second image information of the kraft paper, the second image information comprising surface particle image information of the kraft paper, a crease removing unit comprising a transfer device, a softening device, a crease removing roller set and a drying device, the softening device being used for softening the kraft paper and eliminating the angle of the kraft paper, the drying device being used for drying the kraft paper after the crease removing, the transfer device being capable of transferring the kraft paper with creases to the softening device according to the first image information, the kraft paper being conveyed to the drying device after being output from the softening device and winding around the crease removing roller set, and a cleaning unit capable of removing particles on the kraft paper according to the second image information. The first detection module is any one of a laser scanning device and a structured light scanning device. The first detection module is a laser scanning device, the laser scanning device comprising a laser emitter and a laser receiver, the laser emitter emitting detection signals along the normal direction of the surface of the kraft paper, and the laser receiver being used for receiving the light beams emitted by the laser emitting assembly. The laser scanning device further comprises a moving mechanism, the moving mechanism comprising a first driving member and a moving seat connected to the output end of the first driving member, the laser emitter and the laser receiver being respectively installed at two ends of the moving seat, and the first driving member being capable of driving the moving seat to move along the radial direction of the kraft paper, so that the laser emitter and the laser receiver can synchronously move and scan the surface of the kraft paper.

2. The circuit board press apparatus according to claim 1, wherein The first detection module is a structured light scanning device, the structured light scanning device comprising a structured light emitter and a CCD camera, the structured light emitter being used for projecting a grating to the surface of the kraft paper, and the CCD camera being used for acquiring the surface deformation image of the kraft paper after the projection of the grating.

3. The circuit board press apparatus according to claim 2, wherein The cleaning unit comprises a dust sticking roller and an ion wind knife, the ion wind knife being arranged on one side of the dust sticking roller, the dust sticking roller comprising a roller body and a conductive silica gel layer, the conductive silica gel layer covering the circumferential outer wall of the roller body, and the dust sticking roller and the ion wind knife being used for removing particles on the surface of the kraft paper.

4. The circuit board press apparatus according to claim 3, wherein The softening device comprises a second carrying table, an ironing mechanism and an angle eliminating mechanism, the second carrying table being used for supporting the kraft paper to be crease removed, the ironing mechanism being arranged above the second carrying table, and the angle eliminating mechanism being arranged on the second carrying table and being used for eliminating the angle of the kraft paper, the ironing mechanism being used for softening and ironing the kraft paper after the elimination of the angle.

5. The circuit board press apparatus according to claim 1, wherein ​ 6. The circuit board press apparatus according to claim 1, wherein ​ 7. The circuit board press apparatus of claim 1, wherein ​ 8. The circuit board press apparatus according to claim 7, wherein The angle-eliminating mechanism comprises a suction accessory, a translation assembly and a flattening piece, the suction accessory is arranged above the second bearing table, the suction accessory is used to suck the angle of the kraft paper, the flattening piece is connected with the translation assembly, the translation assembly can drive the flattening piece to move on the second bearing table to unfold the angle of the kraft paper, and the flattening piece is a round rod.

9. A circuit board pressing process applied to the circuit board pressing apparatus according to any one of claims 1 to 8, characterized by, The method comprises the following steps: S1: loading the bottom kraft paper, the bottom kraft paper is fixed on the first bearing table; S2: acquiring image information for the first time, the first detection module and the second detection module acquire first image information and second image information of the bottom kraft paper on the circuit board, the first image information is a deformation image parameter of the kraft paper, and the second image information is surface particle image information of the kraft paper; S3: kraft paper processing, according to the first image information, if the kraft paper has wrinkles or angles, the kraft paper is replaced, the wrinkle-eliminating unit eliminates wrinkles and angles of the replaced kraft paper, and if the kraft paper does not have wrinkles or angles, according to the second image information, the cleaning unit removes particles on the kraft paper; S4: stacking, the circuit board to be pressed is stacked on the bottom kraft paper; S5: loading the top kraft paper, the top kraft paper is fixed on the top circuit board; S6: acquiring image information for the second time, the first detection module and the second detection module acquire first image information and second image information of the kraft paper on the top circuit board, the first image information is a deformation image parameter of the kraft paper, and the second image information is surface particle image information of the kraft paper; S7: repeating S3; S8: pressing the circuit board.

10. The circuit board pressing process according to claim 9, wherein The softening device comprises a second bearing table, an ironing mechanism and an angle-eliminating mechanism, the second bearing table is used to support the kraft paper to be wrinkle-eliminated, the ironing mechanism is arranged above the second bearing table, the angle-eliminating mechanism is arranged on the second bearing table, the angle-eliminating mechanism is used to eliminate the angle of the kraft paper, and the ironing mechanism is used to soften and iron the kraft paper after the angle is eliminated; S3: according to the first image information, the wrinkle-eliminating unit eliminates wrinkles and angles of the replaced kraft paper, after the angle-eliminating mechanism eliminates the angle of the kraft paper, the ironing mechanism softens and irons the kraft paper after the angle is eliminated.

Images