Printed circuit board production line

Abstract

The disclosed embodiments relate to the technical field of circuit boards, and specifically to a printed circuit board production line, which is used to solve the technical problem of low production efficiency of printed circuit boards in related technologies, and comprises a matching device, a punching device, a stacking device and a pressing device arranged in sequence along the production direction; the matching device comprises a storage device and a transfer device, the storage device comprises a plurality of storage spaces arranged in sequence along the vertical direction, each storage space being used to store a type of inner core boards; the transfer device is used to transport the inner core boards in each storage space to the punching device in a preset order; the punching device is used to punch the inner core boards in sequence; the stacking device is used to stack the inner core boards output by the punching device in sequence together, and the pressing device is used to press the inner core boards stacked by the stacking device together, thereby eliminating the need for manual sorting of the inner core boards, and effectively solving the technical problem of printed circuit board production efficiency in related technologies.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the technical field of circuit boards, and in particular, relate to a printed circuit board production line. Background Art

[0002] Multilayer circuit boards have been widely used in various electronic devices due to their advantages such as high wiring density and small size. In the related art, during production, holes are usually punched on each inner core board by a punching device, and then the inner core boards are stacked together and pressed together to form a multilayer circuit board.

[0003] However, the circuit images on each inner core board may be different, so the inner core boards are usually stacked together in a specific order manually, resulting in low production efficiency of multi-layer circuit boards. Summary of the invention

[0004] The embodiment of the present disclosure provides a printed circuit board production line to solve the technical problem of low production efficiency of printed circuit boards in the related art.

[0005] The solution of the embodiment of the present disclosure to solve the above technical problems is as follows:

[0006] A printed circuit board production line comprises a printing device, a punching device, a stacking device and a pressing device arranged in sequence along a production direction;

[0007] The matching device includes a storage device and a transfer device. The storage device includes a plurality of storage spaces arranged in sequence along the vertical direction, and each storage space is used to store a type of inner core board; the transfer device is used to transport the inner core boards in each storage space to the punching device in a preset order; the punching device is used to punch the inner core boards in sequence;

[0008] The stacking device is used to stack the inner core panels output by the punching device in sequence, and the pressing device is used to press the inner core panels stacked by the stacking device together.

[0009] The beneficial effects of the embodiments of the present disclosure are as follows: by sequentially arranging matching equipment, punching equipment, stacking equipment and pressing equipment along the direction of production, and the matching equipment includes storage equipment and transfer equipment, the storage equipment is used to store different types of inner core boards, the transfer equipment transports different types of inner core boards to the punching equipment in a preset order, the punching equipment transports the inner core boards to the stacking equipment in sequence in a certain order, the stacking equipment only needs to stack the inner core boards in sequence in a certain order, and multiple inner core boards can be stacked together in a preset order and transported to the pressing equipment, at this time, the inner core boards transported to the pressing equipment are arranged in a preset order, thereby eliminating the need for manual sorting of the inner core boards, thereby effectively improving the production efficiency of printed circuit boards, and solving the technical problem of printed circuit board production efficiency in related technologies.

[0010] Based on the above technical solution, the embodiment of the present disclosure may also be improved as follows.

[0011] In a possible implementation, the transfer device includes a first manipulator and a conveying device, wherein the first manipulator is used to grab the inner core board in the storage space to the conveying device, and the conveying device is used to convey the inner core board to the punching device.

[0012] In a possible implementation, a suction cup is provided at the end of the first manipulator, and the suction cup is used to absorb the inner core board; the conveying equipment includes a plurality of conveying shafts and a conveying motor arranged in sequence along the production direction, and each of the conveying shafts is provided with a plurality of conveying rollers spaced apart along its axial direction; the conveying motor is connected to each of the conveying shafts in a transmission manner.

[0013] In a possible implementation, the storage device includes a frame and a plurality of partitions, the frame having a receiving cavity, a plurality of partitions being arranged in parallel and at intervals in the receiving cavity, and the plurality of partitions dividing the receiving cavity into a plurality of storage spaces; the partitions are slidably connected to the frame;

[0014] The transfer device also includes a lifting device and a pulling device arranged on the lifting device, the lifting device is used to drive the pulling device to lift and lower so that the pulling device is aligned with the partition, and the pulling device is used to pull the partition out of the accommodating cavity.

[0015] In a possible implementation, the printed circuit board production line further includes a browning device disposed between the punching device and the stacking device, and the browning device is used to perform a browning treatment on the inner core board.

[0016] In a possible implementation, the browning equipment includes a medicine tank, a browning moving device, a detection device and a dosing device, wherein the browning moving device is used to drive the inner core plate to move in the medicine tank; the detection device is arranged at the feed end of the medicine tank, and is used to detect the number of the inner core plates entering the medicine tank; the dosing device is connected to the detection device, and the dosing device is used to add liquid medicine into the medicine tank according to the number of the inner core plates entering the medicine tank.

[0017] In a possible implementation, the dosing device includes a controller, a medicine storage cylinder, a delivery pump, a detection cylinder and a control valve. The medicine storage cylinder is connected to the detection cylinder through the delivery pump. A liquid level gauge is provided in the detection cylinder. The detection cylinder is connected to the medicine cylinder through the control valve; the controller is electrically connected to the delivery pump, the liquid level gauge, the control valve and the detection device. The controller is used to control the delivery pump to stop working and control the control valve to open when the liquid level gauge detects that the medicine liquid in the detection cylinder reaches a set amount.

[0018] In a possible implementation, the punching device also includes a blowing device, which is located at the discharge end of the punching device. The blowing device is used to blow air onto the inner core board after punching. The blowing direction has a preset angle with the inner core board and is opposite to the production direction.

[0019] In a possible implementation, the punching device includes: a mounting plate, on which a plurality of punching needles are arranged, and the punching needles are used to punch holes in the inner core board.

[0020] In a possible implementation, the preset angle is 30-60°. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of a partial structure of a printed circuit board production line provided in an embodiment of the present disclosure;

[0023] Figure 2 A top view of a device provided in accordance with an embodiment of the present disclosure;

[0024] Figure 3 A schematic diagram of the structure of a storage device provided in an embodiment of the present disclosure;

[0025] Figure 4 A right side view of a storage device provided by an embodiment of the present disclosure;

[0026] Figure 5 A schematic diagram of the structure of a first manipulator provided in an embodiment of the present disclosure;

[0027] Figure 6 A schematic diagram of the structure of a second manipulator provided in an embodiment of the present disclosure;

[0028] Figure 7 A top view of a punching device provided in an embodiment of the present disclosure;

[0029] Figure 8 A top view of a browning device provided in an embodiment of the present disclosure;

[0030] Fig. 9 A schematic diagram of the structure of a dosing device provided in an embodiment of the present disclosure;

[0031] Fig.10 A top view of a stacking device provided in an embodiment of the present disclosure.

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 100. Match this equipment;

[0034] 110, storage device; 111, first support plate; 112, second support plate; 113, third support plate; 114, partition; 115, handle; 116, storage space;

[0035] 120, first manipulator; 121, manipulator arm; 122, mounting plate; 123, suction cup;

[0036] 130, conveying equipment; 131, first support platform; 132, second support platform; 133, conveying shaft; 134, conveying roller;

[0037] 140. Lifting equipment;

[0038] 150, pulling device; 151, second cylinder; 152, second manipulator; 1521, first clamping claw; 1522, first clamping slot; 1523, second clamping claw; 1524, second clamping slot;

[0039] 200. Punching equipment;

[0040] 210, first punching conveying platform; 220, second punching conveying platform;

[0041] 300. Browning equipment;

[0042] 310. Mobile device;

[0043] 320, medicine tank; 321, acid medicine tank; 322, first water washing tank; 323, alkaline medicine tank; 324, second water washing tank; 325, pre-cleaning tank; 326, browning tank; 327, third water washing tank; 328, pure water tank;

[0044] 330, oven;

[0045] 340, dosing device; 341, dosing table; 342, drug storage tank; 343, delivery pump; 344, detection tank; 345, control valve;

[0046] 400, stacking equipment;

[0047] 410, stacking conveying platform; 420, stacking carrying platform. DETAILED DESCRIPTION

[0048] Multilayer circuit boards have been widely used in various electronic devices due to their advantages such as high wiring density and small size. In the related art, during production, holes are usually punched on each inner core board by a punching device, and then the inner core boards are stacked together and pressed together to form a multilayer circuit board.

[0049] However, the circuit images on each inner core board may be different, so the inner core boards are usually stacked together in a specific order manually, resulting in low production efficiency of multi-layer circuit boards.

[0050] In view of this, the embodiment of the present disclosure provides a printed circuit board production line, by sequentially arranging matching equipment, punching equipment, stacking equipment and pressing equipment along the production direction, and the matching equipment includes storage equipment and transfer equipment, the storage equipment is used to store different types of inner core boards, the transfer equipment transports different types of inner core boards to the punching equipment in a preset order, the punching equipment transports the inner core boards to the stacking equipment in sequence, the stacking equipment only needs to stack the inner core boards in sequence, and multiple inner core boards can be stacked together in a preset order and transported to the pressing equipment, at this time, the inner core boards transported to the pressing equipment are arranged in a preset order, so there is no need to manually sort the inner core boards, thereby effectively improving the production efficiency of the printed circuit boards, and solving the technical problem of low production efficiency of printed circuit boards in related technologies.

[0051] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present disclosure more obvious and understandable, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0052] Reference Figures 1 to 10 The embodiment of the present disclosure discloses a printed circuit board production line, which includes a matching device 100, a punching device 200, a stacking device 400 and a pressing device arranged in sequence along a production direction.

[0053] The equipment 100 includes a storage device 110 and a transfer device. The storage device 110 includes a plurality of storage spaces 116 arranged in sequence and spaced apart in a vertical direction. Each storage space 116 is used to store a type of inner core board.

[0054] Exemplarily, the matching device 100 may include a matching frame, which includes a first support beam and a second support beam that are relatively arranged, the first support beam and the second support beam are both vertically arranged, and a first cross beam is arranged between the first support beam and the second support beam, one end of the first cross beam is connected to the first support beam, and the other end thereof is connected to the second support beam, and there is an open space under the first cross beam, and this open space can be used to place the storage device 110, thereby effectively reducing the space occupied by the matching device 100.

[0055] Exemplarily, the storage device 110 may include a frame, which may include a first support plate 111, a second support plate 112, and a third support plate 113 connected in sequence, the first support plate 111 and the second support plate 112 are arranged oppositely and vertically, the third support plate 113 is arranged between the first support plate 111 and the second support plate 112 in the horizontal direction, and one end of the third support plate 113 is connected to the bottom of the first support plate 111, and the other end is connected to the bottom of the second support plate 112, so that the first support plate 111, the second support plate 112, and the third support plate 113 are connected to form a receiving cavity. A plurality of partitions 114 may be arranged in the receiving cavity, and the plurality of partitions 114 are arranged parallel and spaced in the vertical direction to divide the receiving cavity into a plurality of storage spaces, that is, the plurality of partitions 114 divide the receiving space into a plurality of storage spaces 116 in the horizontal direction, and the inner core plate may be placed in the storage space 116 and located on the partitions.

[0056] Furthermore, each storage space is used to store a type of inner core board, wherein the type of inner core board can be the inner core boards at the same position in the printed circuit board, thereby realizing classified storage of different types of inner core boards; that is, the inner core boards at the same position in the printed circuit board are placed in the same storage space. Of course, this embodiment is not limited to this, and in some implementations, the inner core boards with the same circuit patterns can also be placed in the same storage space to realize classified storage of the inner core boards.

[0057] The transfer device is used to transport the inner core panels in each storage space 116 to the punching device 200 in a preset order. For example, the transfer device may include a moving arm, one end of which may be slidably arranged on the first beam, and the other end of which may be provided with a clamping claw, which is used to clamp the inner core panel. At the same time, the moving arm may have a certain length, that is, the moving arm may extend from the first beam to the punching device 200. Thus, when the inner core panel needs to be transported to the punching device 200 in a preset order, the moving arm may slide along the first beam to the corresponding inner core panel, and clamp the inner core panel by the clamping claw, and then the inner core panel is sequentially transported to the punching device 200 by the moving arm. For example, a slideway may be provided on the first beam, and the slideway extends from one end of the first beam to the other end along the length direction of the first beam, and a slider may be provided on the moving arm, and the slider is slidably arranged on the slideway of the first beam, so that the moving arm can slide along the first beam.

[0058] The punching device 200 is used to punch holes in the inner core board. For example, the punching device 200 can be an OPE (OPTILINE PE) punching machine. This OPE punching machine can punch out multiple positioning holes at one time, and can also perform compensatory punching if there is a difference in expansion and contraction of the inner core board, which has the advantage of high punching accuracy. The inner core board is provided with a positioning cursor point and a positioning PAD (the positioning PAD is a pad, which is the part where the printed circuit board and the component pins are welded to each other). The positioning cursor point is set on the edge of the inner core board. This positioning cursor point is used for positioning the OPE punching machine, that is, after positioning by identifying the positioning cursor point through X-RAY (X-ray), multiple positioning PADs are punched at one time.

[0059] Exemplarily, the punching device 200 includes a punching support frame and a first punching conveyor 210. The punching support frame may include a second crossbeam and a third support beam and a fourth support beam arranged opposite to each other. The third support beam and the fourth support beam are arranged vertically, one end of the second crossbeam is connected to the third support beam, and the other end thereof is connected to the fourth support beam. A telescopic cylinder may be arranged on the second crossbeam, the center line of which is arranged vertically, and a punching needle is connected to the telescopic cylinder, and the punching needle can punch holes in the inner core plate under the drive of the telescopic cylinder.

[0060] In addition, one end of the first punching conveying platform 210 is arranged adjacent to the matching equipment 100, and the other end of the first punching conveying platform 210 extends between the third support beam and the fourth support beam, and the first punching conveying platform 210 is located below the third support beam, that is, the first punching conveying platform 210 is located below the punching needle, so that the inner core panel can be transported to the bottom of the punching needle to realize the punching of the inner core panel by the punching needle.

[0061] It is worth noting that a conveyor belt or a conveyor belt may be provided on the first punching transfer platform 210, and the inner core board is transferred to the bottom of the punching needle by the conveyor belt or the conveyor belt for punching.

[0062] The stacking device 400 is arranged on one side of the punching device 200, and is used to stack the inner core panels delivered by the punching device 200 in sequence. Exemplarily, the stacking device 400 may include a stacking conveyor 410, a third manipulator and a stacking carrier 420, one end of the stacking conveyor 410 is connected to the discharge end of the punching device 200, and the other end thereof extends to the stacking carrier 420 along the production direction. At the same time, the third manipulator may be arranged at one end of the first stacking conveyor 410 close to the stacking conveyor 410, so that the third manipulator can stack the inner core panels from bottom to top on the stacking carrier 420 in a sequential order. Therefore, by adopting the above structure, multiple inner core panels can be stacked together in a preset order; and the automation of receiving panels is realized, which reduces the factory's demand for manpower and labor costs, and at the same time reduces the work of transporting the inner core between workstations, reduces the risk of scratches on the inner core panels, and improves the quality rate.

[0063] The pressing device can be arranged on one side of the stacking device 400, and a pressing conveying platform can be arranged between the stacking device 400 and the pressing device, through which the inner core panels on the stacking support platform 420 can be transported to the pressing device. A transport robot can also be arranged between the pressing device and the stacking device 400, through which the stacked inner core panels are transported to the pressing device. When the stacked inner core panels are transported to the pressing device, the staff only needs to place them in the pressing device from top to bottom in sequence, and press them together through the pressing device, thereby eliminating the need for manual rearrangement of multiple inner core panels at this process, and since multiple inner core panels have been stacked together, they occupy less space, thereby avoiding the need for a large amount of manpower and a large working space.

[0064] In addition, the pressing equipment may include hot-melt and riveting equipment, which are commonly used in printed circuit boards and will not be described in detail here.

[0065] The printed circuit board production line provided in this embodiment is provided with a matching device 100, a punching device 200, a stacking device 400 and a pressing device in sequence along the direction of the production line, and the matching device 100 includes a storage device 110 and a transfer device, wherein a plurality of storage spaces 116 are provided on the storage device 110, each storage space 116 is used to place a type of inner core board, and the inner core board on the storage device 110 can be transported to the punching device 200 in a preset order through the transfer device, the punching device 200 punches the inner core board in sequence, and transports the inner core board to the stacking device 400 in sequence, the stacking device 400 stacks a plurality of inner core boards in sequence from bottom to top, and transports the stacked inner core boards to the pressing device, at this time, the inner core boards transported to the pressing device are arranged in a preset order, thereby eliminating the need to manually sort the inner core boards, thereby effectively improving the production efficiency of the printed circuit boards, and solving the technical problem of the production efficiency of the printed circuit boards in the related art.

[0066] Continue to refer to Figure 3 The storage device 110 includes a frame and a plurality of partitions 114. The frame has a receiving cavity. The plurality of partitions 114 are arranged in parallel and at intervals in the receiving cavity. The plurality of partitions 114 divide the receiving cavity into a plurality of storage spaces 116, and the partitions 114 are slidably connected to the frame.

[0067] Exemplarily, the frame includes a first support plate 111, a second support plate 112 and a third support plate 113 connected in sequence, and the first support plate 111, the second support plate 112 and the third support plate 113 are all arranged vertically, so that the above-mentioned accommodating cavity is formed between the first support plate 111, the second support plate 112 and the third support plate 113. At the same time, a plurality of partitions 114 are arranged in the accommodating cavity, such as four or six, and the number of partitions 114 can be set according to actual needs. The plurality of partitions 114 are all arranged horizontally in the accommodating cavity, and there is a certain space between adjacent partitions 114 in the vertical direction, and the space forms a storage space 116, thereby dividing the space of the accommodating cavity in the vertical direction into a plurality of storage spaces 116 by arranging a plurality of partitions 114, so that a variety of different types of inner core boards can be placed in the accommodating cavity, and the inner core boards can be placed on the storage device 110 in a certain preset order.

[0068] In some embodiments, a first slide is provided on the first support plate 111, and the first slide is provided in the horizontal direction; a second slide is provided on the second support plate 112, and the first slide and the second slide are provided opposite to each other, wherein one end of the partition 114 is slidably provided on the first slide, and the other end of the partition 114 is slidably provided on the second slide, thereby realizing a sliding connection between the partition 114 and the frame. In addition, the first slide and the second slide are both multiple and the number is the same, that is, the number of the first slide and the second slide are respectively consistent with the number of the partitions 114, so that each partition 114 can be slidably provided on the frame, thereby facilitating the partition 114 to be pulled out of the accommodating cavity or pushed into the accommodating cavity under the action of external force.

[0069] For example, Figure 4 As shown, a handle 115 is provided on the end surface of the partition 114 facing the production direction. The handle 115 can be an annular structure, and can be an integral structure with the partition 114, or can be fixedly connected to the partition 114 by welding.

[0070] In addition, the heights of the first support plate 111, the second support plate 112 and the third support plate 113 can be set to be lower than the height of the open space below the beam in the frame, so that the rack can be placed in this open space, thereby reducing the space occupied by the storage device 110.

[0071] In some embodiments, rolling wheels are provided on the bottom surfaces of the first support plate 111 and the second support plate 112, and the number of rolling wheels can be set to one or more. By setting the rolling wheels, it is convenient for staff to change the position of the storage device 110 so that the storage device 110 can be adjusted to the desired position.

[0072] In addition, there can be multiple storage devices 110, and multiple storage devices 110 can be arranged side by side in the open space below the beam in the matching frame, and more types of inner core boards can be placed therein, so that the matching device 100 can be suitable for production lines of circuit boards with more layers.

[0073] The transfer device may include a first robot 120 and a conveying device 130 , wherein the first robot 120 is used to grab the inner core panel in the storage space 116 to the conveying device 130 , and the conveying device 130 is used to convey the inner core panel to the punching device 200 .

[0074] For example, Figure 5As shown, a suction cup 123 is provided at the end of the first manipulator 120, and the suction cup 123 is used to absorb the inner core board. It can be understood that the first manipulator 120 may include a robot arm 121, one end of which is slidably set on the first beam and can slide back and forth along the length direction of the first beam, and the other end of the robot arm 121 is provided with a mounting plate 122, and the mounting plate 122 is provided with a suction cup 123. Among them, the robot arm 121 may include a first branch arm and a second branch arm, one end of the first branch arm is slidably set on the first beam of the matching frame, and the first branch arm can rotate around the first beam, and the other end of the first branch arm is rotatably connected to the second branch arm, thereby enabling the robot arm 121 to bend and move, so as to facilitate the grasping of the inner core board.

[0075] In addition, the size of the mounting plate 122 can be matched with the size of the inner core board, that is, the size of the mounting plate 122 can be close to the size of the inner core board, and at the same time, a plurality of suction cups 123 are arranged on the mounting plate 122, and the plurality of suction cups 123 are evenly arranged on the mounting plate 122. By setting the size of the mounting plate 122 to be close to the size of the inner core board and the suction cups 123 are evenly distributed on the mounting plate 122, the first manipulator 120 can stably adsorb the inner core board and stably transport the new inner board to the conveying equipment 130.

[0076] The conveying device 130 may include a plurality of conveying shafts 133 and a conveying motor which are sequentially arranged at intervals along the production direction. A plurality of conveying rollers 134 are arranged at intervals along the axial direction of each conveying shaft 133 , and the conveying motor is drivingly connected to each conveying shaft 133 .

[0077] Exemplarily, the conveying device 130 can be arranged between the matching frame and the punching device 200, and it can include a first support platform 131 and a second support platform 132 that are arranged oppositely and at intervals, and the first support platform 131 and the second support platform 132 both extend from the matching frame to the punching device 200. At the same time, a plurality of conveying shafts 133 are arranged between the first support platform 131 and the second support platform 132, and the plurality of conveying shafts 133 are arranged in sequence and at intervals along the production direction. That is, one end of each conveying shaft 133 is fixedly connected to the first support platform 131, and the other end thereof is fixedly connected to the second support platform 132, and the length dimension of each conveying shaft 133 is greater than the length and width dimensions of the inner core plate, so that the inner core plate can be placed on the conveying shaft 133. In addition, the conveying motor can be arranged on the first support platform 131 or the second support platform 132, and the power output end of the conveying motor can be connected to a transmission chain, which extends along the length direction of the first support platform 131 or the second support platform 132, and the transmission chain is connected to each conveying shaft 133, so that each conveying shaft 133 can rotate with the motor, thereby driving the inner core plate to move toward the punching device 200.

[0078] For example, the conveying roller 134 may be in the shape of a roller, and the conveying roller 134 may be made of plastic with excellent properties such as wear resistance and corrosion resistance. By arranging a plurality of conveying rollers 134 on the conveying shaft 133, the movement resistance of the inner core board can be reduced, thereby reducing the wear of the inner core board during transportation, thereby playing a certain protective role on the inner core board.

[0079] In some embodiments, the transfer device also includes a lifting device 140 and a pulling device 150 arranged on the lifting device 140, wherein the lifting device 140 is used to drive the pulling device 150 to lift and lower so that the pulling device 150 is aligned with the partition 114, and the pulling device 150 is used to pull the partition 114 out of the accommodating cavity.

[0080] Exemplarily, the lifting device 140 may include a lifting frame and a first cylinder, the first cylinder is connected to the lifting frame, and the lifting frame is arranged corresponding to the storage device 110. The lifting frame may include a first rod, a second rod, a third rod and a fourth rod, and the four rods are sequentially connected to form a frame, wherein the first rod and the second rod are parallel and oppositely arranged, the third rod and the fourth rod are parallel and oppositely arranged, and the length extension direction of the first rod and the second rod is the same as the production direction.

[0081] At the same time, a connecting beam is arranged on the frame, and one end of the connecting beam is fixedly connected to the third rod body, and the other end thereof is fixedly connected to the fourth rod body, so that the connecting beam is fixedly arranged on the frame, and the connecting beam can be arranged in the middle position of the frame.

[0082] The first cylinder can be arranged below the lifting frame, and the driving end of the first cylinder is connected to the connecting beam, so that the connecting beam can move up and down along the vertical direction with the first cylinder. At the same time, since the connecting beam is connected to the frame, the frame can also move up and down in the vertical direction. Moreover, since the connecting beam is arranged in the middle position of the frame, the frame can move up and down in the vertical direction more stably.

[0083] In some embodiments, a first rod body is provided with a plurality of first rolling axes on one side facing the second rod body, and the plurality of first rolling axes are sequentially arranged along the length direction of the first rod body; a second rod body is also provided with a plurality of second rolling axes on one side facing the first rod body, and the plurality of second rolling axes are sequentially arranged along the length direction of the second rod body. In addition, the first rolling axis and the second rolling axis are located in the same horizontal plane, and the horizontal plane where the first rolling axis and the second rolling axis are located is higher than the horizontal plane where the connecting beam is located, and this horizontal plane can be arranged corresponding to the corresponding partition 114.

[0084] The pulling device 150 is disposed on the lifting frame, and may be disposed at one end of the lifting frame away from the storage device 110 .

[0085] Exemplarily, the pulling device 150 may include a second cylinder 151 and a second manipulator 152, the second cylinder 151 is arranged at one end of the lifting frame away from the storage device 110, and the driving end of the second cylinder 151 is connected to the second manipulator 152, and the second cylinder 151 can drive the second manipulator 152 to move in a horizontal direction, that is, under the action of the second cylinder 151, the second manipulator 152 can move to the storage device 110. In addition, the structure of the second manipulator 152 cooperates with the structure of the handle 115 on the partition 114, so that the second manipulator 152 can hold the handle 115 to pull one end of the partition 114 out of the accommodating cavity, and this end of the partition 114 is pulled from the accommodating cavity to the lifting frame, and one side of the partition 114 is connected to the first rolling axis on the first rod body, and the other side is connected to the second rolling axis on the second rod body. Under the action of the first rolling axis and the second rolling axis, the movement resistance of the partition 114 can be effectively reduced, so that the partition 114 can be pulled more smoothly.

[0086] For example, Figure 6As shown, the second manipulator 152 may include a connecting plate, an electromagnet, a first clamping claw 1521 and a second clamping claw 1523. The connecting plate is connected to the driving end of the second cylinder 151, and the electromagnet is arranged on the connecting plate. The first clamping claw 1521 and the second clamping claw 1523 are both movably arranged on the connecting plate, and the first clamping claw 1521 and the second clamping claw 1523 are both connected to the electromagnet. At the same time, the first clamping claw 1521 and the second clamping claw 1523 are arranged opposite to each other, and the first clamping claw 1521 and the second clamping claw 1523 may be in a rod shape, and the first clamping claw 1521 is provided with a first clamping groove 1522 on the side facing the second clamping claw 1523, and the opening of the first clamping groove 1522 faces the second clamping claw 1523; the second clamping claw 1523 is provided with a second clamping groove 1524 on the side facing the first clamping claw 1521, and the opening of the second clamping groove 1524 is arranged opposite to the opening of the first clamping groove 1522. Since the first clamping claw 1521 and the second clamping claw 1523 are both connected to the electromagnet, the first clamping claw 1521 and the second clamping claw 1523 can move in the direction of approaching or moving away from each other by controlling the electromagnet. That is, when the second robot needs to pull the handle 115 on the partition 114, the first clamping claw 1521 and the second clamping claw 1523 are moved in the direction of approaching the handle 115 by controlling the electromagnet until the first clamping groove 1522 is clamped on one side of the handle 115 and the second clamping groove 1524 is clamped on the other side of the handle 115, that is, the handle 115 is clamped between the first clamping groove 1522 and the second clamping groove 1524, so that the second robot 152 can clamp the handle 115; when the partition 114 is pushed into the accommodating cavity, the electromagnet is controlled to move the first clamping claw 1521 and the second clamping claw 1523 in the direction of moving away from the handle 115, that is, the handle 115 is released. Therefore, by providing the above structure, the partition 114 can be pulled out or pushed into the accommodating cavity.

[0087] In this embodiment, there are two storage devices 110, which are respectively arranged at the two ends of the open space. Each storage device 110 is correspondingly provided with a first manipulator 120, a lifting device 140 and a pulling device 150. There can be only one conveying device 130, that is, the conveying device 130 can be arranged between the two lifting devices 140.

[0088] In summary, the working process of the above conveying equipment 130 and transfer equipment is as follows: first, the lifting frame moves to the horizontal height of the corresponding partition 114 under the driving action of the first cylinder, and then the second manipulator 152 moves to the partition 114 under the action of the second cylinder 151, and controls the electromagnet to make the first claw 1521 and the second claw 1523 move toward the direction close to the handle 115 on the partition 114 until the handle 115 is stuck between the first slot 1522 and the second slot 1524. At this time, the second manipulator 152 clamps the handle 115, and then under the action of the second cylinder 151, the second manipulator 152 pulls the partition 114 out of the corresponding storage space 116. At this time, the inner core board on the partition 114 is also pulled out along with the partition 114, and the first manipulator 120 moves to the top of the inner core board, and sucks the inner core board through the suction cup 123 and sends it to the conveying device 130, and the inner core board is conveyed to the punching device 200 through the conveying device 130. Then the second manipulator 152 pushes the partition 114 into the accommodating cavity of the storage device 110, and the solenoid valve controls the first claw 1521 and the second claw 1523 to move in a direction away from the handle 115, that is, to release the handle 115, thereby completing the transfer of a type of inner core board. Then, the height of the lifting frame is adjusted by the first cylinder so that the second manipulator 152 can be aligned with the next partition 114, and the second manipulator 152 is pushed to the handle 115 of the partition 114 by the second cylinder 151 again. The second manipulator 152 holds the handle 115 to pull the partition 114 onto the lifting frame, and then the first manipulator 120 moves to transport the inner core board on the partition 114 to the conveying equipment 130; this reciprocating operation is performed until all the inner core boards are transported to the conveying equipment 130 in a preset order.

[0089] Exemplarily, the punching device 200 may include a mounting plate with a plurality of punching needles on the mounting plate, and the punching needles are used to punch holes in the inner core board.

[0090] In this embodiment, the mounting plate 122 is arranged at the driving end of the telescopic cylinder, and a plurality of punching needles are arranged on the mounting plate. The positions of the plurality of punching needles can be designed according to the positions of the required punching holes on the inner core plate. The inner core plate is generally designed with 6-12 PAD positioning holes, for example, 6, 8 or 12, so that the punching device 200 can complete the punching of multiple positioning holes on the inner core plate at one time. Thus, the phenomenon that the PAD positioning holes on the same inner core plate cannot be punched out at one time in the related art, thereby causing the offset between different positioning holes on the same inner core plate, is avoided.

[0091] In some embodiments, the punching device 200 may also include a blowing device, which is located at the discharge end of the punching device 200. The blowing device is used to blow air onto the inner core board after punching. The blowing direction has a preset angle with the inner core board and is opposite to the production direction. The preset angle can be set to 30-60°, such as 30°, 45° or 60°. The blowing device may be an air knife. By setting this structure, the debris after the inner core board is punched can be blown away from the production direction, thereby preventing the debris from being brought into the next process.

[0092] In some embodiments, the punching device 200 may further include a second punching conveying platform 220 , which is disposed at the discharge end of the punching device 200 and is used to convey the punched inner core board to the next process.

[0093] In some embodiments, a browning device 300 is further disposed between the punching device 200 and the stacking device 400 , and the browning device 300 is used to perform browning treatment on the inner core board.

[0094] It should be noted that browning is an important step in the manufacturing process of printed circuit boards. It mainly allows the inner core board to react with the browning solution. The solution will slightly etch the copper surface of the inner core board, increase the roughness of the copper surface of the inner core board, and enhance the bonding force between the inner core board and the PP sheet (semi-cured sheet).

[0095] Exemplarily, the browning equipment 300 includes a medicine tank, a browning moving device 310, a detection device and a dosing device 340. The browning moving device 310 is used to drive the inner core plate to move in the medicine tank. The detection device is arranged at the feed end of the medicine tank and is used to detect the number of inner core plates entering the medicine tank. The dosing device 340 is connected to the detection device so that the dosing device 340 can add medicine liquid into the medicine tank according to the number of inner core plates entering the medicine tank.

[0096] like Figure 8 As shown, the medicine tank may include an acid medicine tank 321, a first water washing tank 322, an alkaline medicine tank 323, a second water washing tank 324, a pre-cleaning tank 325, a browning tank 326, a third water washing tank 327, and a pure water tank 328 arranged in sequence along the production line. The acid medicine tank 321 and the alkaline medicine tank 323 are used to remove oil stains and impurities on the surface of the inner core board, the pre-cleaning tank 325 is used to improve the activity of the copper plate on the surface of the inner core board, and the browning tank 326 is used to micro-etch the copper plate on the surface of the inner core board to increase the roughness of the copper surface. The first water washing tank 322 is used to remove the acid medicine on the inner core board, the second water washing tank 324 is used to remove the alkaline medicine on the inner core board, the third water washing tank 327 is used to remove the browning medicine on the surface of the inner core board, and the pure water tank 328 is used to remove the tap water on the surface of the inner core board to prevent the ions in the tap water from affecting the inner core board.

[0097] In addition, one end of the browning mobile device 310 is arranged adjacent to the second punching conveying table 220 of the punching equipment 200, and the other end thereof passes through the acidic medicine tank 321, the first water washing tank 322, the alkaline medicine tank 323, the second water washing tank 324, the pre-cleaning tank 325, the browning tank 326, the third water washing tank 327, and the pure water tank 328 in sequence, so that the inner core board can be transported from the punching equipment 200 to the medicine tank 320 for browning treatment.

[0098] Exemplarily, the browning moving device 310 may include a first transmission member and a second transmission member, the second transmission member is arranged above the first transmission member, and the transmission directions of the first transmission member and the second transmission member are consistent with the production direction. At the same time, the inner core plate is sandwiched between the first transmission member and the second transmission member, and the inner core plate can move in the same direction as the first transmission member and the second transmission member.

[0099] In this embodiment, the first transmission member includes multiple first rotating shafts, and the multiple rotating shafts are arranged in sequence at intervals along the production direction. Each first rotating shaft is provided with multiple first rotating rollers at intervals along its axial direction. At the same time, first chains are provided on both sides of the first rotating shaft. The length extension direction of the first chain is the same as the production direction, and the first chain is connected to the end of each first rotating shaft, so that the first chain can drive the first rotating shaft to rotate.

[0100] The second transmission member includes a plurality of second rotating shafts, which are arranged in sequence along the direction of production. A plurality of second rotating rollers are arranged in sequence along the axial direction of each second rotating shaft. At the same time, a second chain is arranged on both sides of the second rotating shaft. The length extension direction of the second chain is the same as the production direction, and the second chain is connected to the end of each second rotating shaft, so that the second chain can drive the second rotating shaft to rotate. Therefore, by setting the first transmission member and the second transmission member, the inner core plate can be moved along the direction of the production line, and then the inner core plate can be moved to the acidic medicine tank 321, the first water washing tank 322, the alkaline medicine tank 323, the second water washing tank 324, the pre-cleaning tank 325, the browning tank 326, the third self-opening water tank, and the pure water tank 328 in sequence, and finally moved to the discharge end of the browning equipment 300 after being dried in the oven 330 and entering the next process.

[0101] For example, Fig. 9As shown, the dosing device 340 may include a controller, a drug storage cylinder 342, a delivery pump 343, a detection cylinder 344 and a control valve 345. The drug storage cylinder 342 is connected to the detection cylinder 344 through the delivery pump 343. A liquid level gauge is provided in the detection cylinder 344. The detection cylinder 344 is connected to the drug cylinder in the browning equipment 300 through the control valve 345; the controller is electrically connected to the delivery pump 343, the liquid level gauge, the control valve 345, and the detection device. The controller is used to control the delivery pump 343 to stop working and control the control valve 345 to open when the liquid level gauge detects that the drug liquid in the detection cylinder 344 reaches a set amount.

[0102] Exemplarily, the dosing device 340 may include a dosing table 341, on which a drug storage cylinder 342 is disposed. There may be multiple drug storage cylinders 342, which are arranged side by side on the dosing table 341. When the drug liquid in one of the storage cylinders is used up, other drug cylinders can be activated, thereby ensuring the continuity of dosing and further ensuring the efficiency of the production line.

[0103] In some embodiments, a plurality of dosing devices 340 are provided on one side of the browning equipment 300, that is, the plurality of dosing devices 340 are arranged in sequence along the production direction. For example, dosing devices 340 can be provided at locations corresponding to the acidic medicine tank 321, the first water washing tank 322, the alkaline medicine tank 323, the second water washing tank 324, the pre-cleaning tank 325, the browning tank 326, the third self-opening water tank and the pure water tank 328. The dosing devices 340 can be used to automatically dosing the medicine, thereby eliminating the need for manual dosing and further improving production efficiency.

[0104] For example, the detection device can be an infrared sensor. By arranging the infrared sensor at the feeding end of the browning line, the number of inner core plates entering the medicine tank can be accurately detected, so that the dosing device 340 can accurately obtain the amount of liquid medicine added to the medicine tank, thereby further ensuring the continuity of the production line and improving production efficiency.

[0105] In addition, the browning speed of the browning device 300 is the same as that of the punching device 200, so as to ensure that the inner core plates can be transported from the punching device 200 to the browning device 300 in an orderly manner. Because, if the browning speed of the browning device 300 is too slow, the inner core plates will be piled up on the browning line, and the orderliness of the inner core plates cannot be guaranteed. If the browning speed of the browning device 300 is too fast, there may be no inner core plates in the medicine tank, which will cause the browning device 300 to run idle, resulting in a waste of resources.

[0106] At the same time, since the punching device 200 is provided with an air blowing device, it is prevented that the debris after the inner core plate is punched is brought into the browning tank 326 to contaminate the liquid medicine.

[0107] It should be noted that the printed circuit board production line also includes inner layer etching and inner layer AOI inspection. Among them, inner layer etching is to remove the unnecessary copper foil by chemical reaction to form the required circuit pattern. The inner core board after inner layer etching is then inspected by AOI (automatic optical inspection machine), which uses a digital image capture device (such as a CCD camera) to obtain the image of the object to be tested, and uses the image comparison method to find out whether there is a difference between the image of the circuit diagram of the inner core board to be tested and the image of the designed circuit diagram. If there is a difference, the circuit on the inner core board needs to be modified. Therefore, this process can ensure the accuracy of the circuit on the inner core board. The inner core board with accurate circuit is placed in the storage device in a preset order for the next process.

[0108] Based on the above printed circuit board production line, the working principle is further explained as follows:

[0109] The inner layer core board that has undergone inner layer etching and AOI inspection is placed on the storage device 110 in a preset order. The lifting frame moves to the horizontal height of the corresponding partition 114 under the drive of the first cylinder, and then the second manipulator 152 moves to the partition 114 under the action of the second cylinder 151, and controls the electromagnet to make the first claw 1521 and the second claw 1523 move toward the direction close to the handle 115 on the partition 114 until the handle 115 is stuck between the first slot 1522 and the second slot 1524. At this time, the second manipulator 152 clamps the handle 115, and then under the action of the second cylinder 151, the second manipulator 152 pulls the partition 114 out of the corresponding storage space 116. At this time, the inner core board on the partition 114 is also pulled out along with the partition 114, and the first manipulator 120 moves to the top of the inner core board, and sucks the inner core board through the suction cup 123 and sends it to the conveying device 130, and the inner core board is conveyed to the punching device 200 through the conveying device 130. Then, the second manipulator 152 pushes the partition 114 into the accommodating cavity of the storage device 110, and the solenoid valve controls the first claw 1521 and the second claw 1523 to move in a direction away from the handle 115, that is, to release the handle 115, thereby completing the transfer of a type of inner core board. Then, the height of the lifting frame is adjusted by the first cylinder so that the second manipulator 152 can be aligned with the next partition 114, and the second manipulator 152 is pushed to the handle 115 of the partition 114 by the second cylinder 151 again. The second manipulator 152 pulls the handle 115 to pull the partition 114 onto the lifting frame, and then the first manipulator 120 moves to transport the inner core board on the partition 114 to the conveying device 130; this reciprocating operation is performed until all the inner core boards are transported to the conveying device 130 in a preset order. It should be noted that the second manipulator 152 pulls the corresponding partitions 114 in sequence according to the preset order.

[0110] The conveying device 130 transports the inner core boards to the punching device 200 in sequence for punching. After punching, the inner core boards are transported to the medicine tank 320 for browning treatment through the browning moving device 310. As the browning reaction proceeds, the dosing device 340 will automatically add medicine to the corresponding medicine tank 320 according to the number of inner core boards detected by the detection device, thereby ensuring that there is sufficient medicine in the medicine tank 320, thereby ensuring the efficiency of the production line.

[0111] After the browning is completed, the inner core board is transported to the stacking device 400. Since the inner core board is transported to the punching device 200 and the browning device 300 in a preset order at the matching device 100, it is only necessary to stack the inner core board on the stacking support platform 420 in order through the third manipulator. Then, the stacked inner core board is transported to the pressing device.

[0112] The stacked inner core boards transported to the laminating equipment only need to be manually placed from top to bottom on the laminating equipment, and the PP sheets are placed between the two inner core boards in sequence. Therefore, there is no need to lay different core boards and PP separately, and there is no need to manually sort the inner core boards, that is, there is no need for a large working space and more auxiliary tools, thereby reducing the manpower matching operation and time of hot melting or riveting, releasing the production capacity of the laminating equipment, and improving the working efficiency of the hot melting machine and the riveting machine equipment. At the same time, combining the three independent workstation equipment of the matching equipment 100, the punching equipment 200 and the browning equipment 300 together can effectively save the time and manpower for the transportation of the inner core boards between different processes. Therefore, by adopting this production line, the production efficiency of the printed circuit board is effectively improved.

[0113] In the description of the embodiments of the present disclosure, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present disclosure.

[0114] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second" or "third" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present disclosure, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0115] In the embodiments of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0116] In the embodiments of the present disclosure, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0117] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the disclosed embodiments. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0118] Although embodiments of the present disclosure have been shown and described above, it will be appreciated that the above embodiments are exemplary and are not to be construed as limitations on the present disclosure, and that a person of ordinary skill in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A printed circuit board production line, characterized in that: It includes arranging the matching equipment, punching equipment, browning equipment, stacking equipment and pressing equipment in sequence along the production direction; The matching device includes a matching frame, a storage device, and a transfer device. The matching frame includes a first support beam and a second support beam that are relatively arranged. The first support beam and the second support beam are both vertically arranged, and a cross beam is arranged between the first support beam and the second support beam. One end of the cross beam is connected to the first support beam, and the other end of the cross beam is connected to the second support beam. There is an open space under the first cross beam. The matching frame is used to obtain an open space for setting the storage device. The storage device includes a plurality of storage spaces that are arranged in sequence and spaced apart in the vertical direction, and each storage space is used to store a type of inner core panels. The storage devices are arranged side by side in the open space obtained by the matching frame; the transfer device includes a first manipulator and a conveying device. The transfer device is used to convey the inner core panels in each of the storage spaces to the punching device in a preset order; The end of the first manipulator is provided with a suction cup, and the suction cup is used to absorb the inner core plate; the conveying equipment includes a plurality of conveying shafts and a conveying motor which are sequentially arranged at intervals along the production direction, and each of the conveying shafts is provided with a plurality of conveying rollers which are spaced at intervals along the axial direction thereof, and the conveying motor is drivingly connected with each of the conveying shafts; The punching device includes a blowing device and a mounting plate, and the punching device is used to punch holes in the inner core plate in sequence; The browning equipment includes a medicine tank, a browning moving device, a detection device and a medicine adding device, and the browning equipment is used to perform browning treatment on the inner core board; The stacking device is arranged on one side of the punching device, and the stacking device is used to stack the inner core panels output by the punching device in sequence. The pressing device is arranged on one side of the stacking device, and the pressing device is used to press the inner core panels stacked by the stacking device together. A pressing conveying table or a transport robot is arranged between the stacking device and the pressing device, and the pressing conveying table and the transport robot are used to transport the stacked inner core panels to the pressing device.

2. The printed circuit board production line according to claim 1, characterized in that: The first robot is used to grab the inner core board in the storage space and bring it to the conveying device, and the conveying device is used to convey the inner core board to the punching device.

3. The printed circuit board production line according to any one of claims 1-2, characterized in that: The storage device comprises a frame and a plurality of partitions, wherein the frame has a receiving cavity, and the plurality of partitions are arranged in parallel and at intervals in the receiving cavity, and the plurality of partitions divide the receiving cavity into a plurality of storage spaces; the partitions are slidably connected to the frame; The transfer device also includes a lifting device and a pulling device arranged on the lifting device, the lifting device is used to drive the pulling device to lift and lower so that the pulling device is aligned with the partition, and the pulling device is used to pull the partition out of the accommodating cavity.

4. The printed circuit board production line according to claim 1, characterized in that: The browning moving device is used to drive the inner core plate to move in the medicine tank; the detection device is arranged at the feeding end of the medicine tank, and is used to detect the number of the inner core plates entering the medicine tank; the dosing device is connected to the detection device, and the dosing device is used to add liquid medicine into the medicine tank according to the number of the inner core plates entering the medicine tank.

5. The printed circuit board production line according to claim 4, characterized in that: The dosing device includes a controller, a medicine storage cylinder, a delivery pump, a detection cylinder and a control valve. The medicine storage cylinder is connected to the detection cylinder through the delivery pump. A liquid level gauge is provided in the detection cylinder. The detection cylinder is connected to the medicine cylinder through the control valve. The controller is electrically connected to the delivery pump, the liquid level gauge, the control valve and the detection device. The controller is used to control the delivery pump to stop working and control the control valve to open when the liquid level gauge detects that the medicine liquid in the detection cylinder reaches a set amount.

6. The printed circuit board production line according to claim 1, characterized in that: The blowing device is located at the discharge end of the punching device, and is used to blow air onto the punched inner core board. The blowing direction has a preset angle with the inner core board and is opposite to the production direction.

7. The printed circuit board production line according to claim 1, characterized in that: A plurality of punching needles are arranged on the mounting plate, and the punching needles are used to punch holes in the inner core board.

8. The printed circuit board production line according to claim 6, characterized in that: The preset angle is 30-60°.

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