A multi-azimuth gradient positioning automobile multi-layer PCB etching system

Abstract

The application relates to the field of PCB etching technology and discloses a multi-azimuth gradient positioning automobile multilayer PCB etching system which comprises a device box with a visible sealing cover installed at the upper end, an etching bin is installed on the inner wall of the device box, a cleaning bin is further installed at the right end of the device box, a conveying positioning part is arranged on the device box and the etching bin, and an etching part is further arranged on the device box and the etching bin. The multi-azimuth gradient positioning automobile multilayer PCB etching system can effectively solve the problems in the prior art that the etching time is mainly determined by the conveying belt speed and the etching chamber length, the bottom layer cannot be sprayed and etched, the back surface etching needs to be carried out after the automobile multilayer PCB is turned over, and when the automobile multilayer PCB which is not fixed is etched, the automobile multilayer PCB will have problems such as position deviation and vibration, which causes excessive or insufficient etching and further causes the problems of residual copper short circuit of the automobile multilayer PCB.

Description

TECHNICAL FIELD

[0001] The application relates to the field of PCB etching technology, and particularly relates to a multi-azimuth gradient positioning automobile multilayer PCB etching system. BACKGROUND

[0002] Automobile electronics has extremely strict requirements on the reliability, temperature resistance and signal integrity of printed PCBs, and the manufacturing process of automobile multilayer PCBs is much more complex than that of ordinary consumer electronic products. The core production process of automobile multilayer PCBs covers multiple precision links, and the quality control of each link directly affects the performance of the final product in harsh environments such as vibration, high temperature and humidity. The core production process of multilayer PCBs includes substrate preparation, inner layer manufacturing, lamination and drilling process. The outer layer etching of the multilayer PCB is a key process after lamination, which directly determines the circuit performance and reliability. If the outer layer of the multilayer PCB is etched in advance, it will lead to structural failure, misalignment and yield collapse. In addition, the etching precision and etching time of automobile multilayer PCBs are much higher than those of ordinary PCBs.

[0003] To this end, the application designs a multi-azimuth gradient positioning automobile multilayer PCB etching system. The etching time of the existing etching and cleaning machine is mainly determined by the speed of the conveying belt and the length of the etching chamber, which occupies a large space. The conventional etching method is to place the ordinary PCB flat on the conveying belt, which cannot spray and etch the bottom layer, and needs to be flipped for reverse etching. Since the etching precision and etching time of ordinary PCBs are relatively low, they do not need to be clamped and fixed. When etching the unfixed automobile multilayer PCB, the automobile multilayer PCB may have problems such as position deviation and vibration, which may cause excessive or insufficient etching, and further cause the automobile multilayer PCB to have residual copper short circuit problems. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the application provides a multi-azimuth gradient positioning automobile multilayer PCB etching system, which can effectively solve the problems in the prior art that the etching time is mainly determined by the speed of the conveying belt and the length of the etching chamber, the bottom layer cannot be sprayed and etched, and the reverse etching needs to be flipped. When etching the unfixed automobile multilayer PCB, the automobile multilayer PCB may have problems such as position deviation and vibration, which may cause excessive or insufficient etching, and further cause the automobile multilayer PCB to have residual copper short circuit problems.

[0005] To achieve the above-mentioned purposes, the application is implemented by the following technical solutions:

[0006] The application provides a multi-azimuth gradient positioning automobile multilayer PCB etching system, which comprises:

[0007] The equipment box with a visual sealing cover is installed at the upper end, an etching bin is installed on the inner wall of the equipment box, and a cleaning bin is further installed at the right end of the equipment box; the equipment box and the etching bin are provided with a conveying positioning part in common, and the equipment box and the etching bin are further provided with an etching part in common;

[0008] The conveying positioning part comprises support frames which are symmetrically installed in front of and behind the left and right ends of the inner walls of the equipment box and the etching bin; the upper end of the support frame is provided with an avoiding groove; the equipment box is provided with a conveying group corresponding to the support frame; the upper end of the support frames on the left and right sides is symmetrically provided with a tool plate which is slidably arranged; the tool plate has a character-shaped structure; the inner walls of the front and rear ends of the etching bin are symmetrically provided with a matching plate; the matching plates on the left and right sides and the tool plate are provided with a positioning group in common.

[0009] The etching part comprises nozzle groups which are symmetrically arranged on the inner walls of the front and rear ends of the equipment box; a rotating shaft is installed on the upper end of the equipment box through a bearing seat; a forward and reverse motor is installed on the lower side of the rotating shaft at the front end of the equipment box through a motor seat.

[0010] Further, the inner walls of the front and rear ends of the tool plate are provided with a limiting group; the limiting group comprises slide holes which are symmetrically arranged on the inner walls of the tool plate; the slide holes have a T-shaped design; a limiting plate is slidably installed on the inner wall of the slide hole through a spring; the limiting plate has a T-shaped structure; one end of the limiting plate which faces the outer side of the tool plate is a magnetic attraction structure; the other end of the limiting plate which faces the inner side of the tool plate is rounded; support crosspieces are installed on the lower sides of the inner walls of the left and right ends of the tool plate; a plurality of filter holes are arranged on the support crosspieces and are uniformly distributed from front to back.

[0011] Further, a plurality of butt joints are symmetrically arranged on the inner walls of the front and rear ends of the tool plate; the butt joints are uniformly distributed from left to right; a guide groove is arranged on one end of the matching plate which faces the tool plate and corresponds to the plurality of butt joints; a discharge cavity is arranged in the matching plate and is communicated with the plurality of guide grooves; a discharge pipe is communicated with one end of the matching plate which is away from the tool plate; the discharge pipe is composed of a plurality of connecting pipes and a main pipe; the main pipe of the discharge pipe penetrates the etching bin and the equipment box at the same time.

[0012] Further, the positioning group comprises alignment magnets which are symmetrically embedded on the front and rear ends of the tool plate; electromagnets are embedded on one end of the matching plate which faces the tool plate and correspond to the alignment magnets and the limiting plate.

[0013] Further, the nozzle group comprises a conveying pipe which is symmetrically arranged on the front end of the equipment box through two mounting plates; connecting plates are arranged on the upper and lower sides of the conveying pipe; the front end of the connecting plate is communicated with the conveying pipe through a plurality of adapter elbows which are uniformly distributed from left to right; spray pipes are rotatably installed on the connecting plate and correspond to the plurality of adapter elbows; the front ends of the plurality of spray pipes are rotatably penetrated into the etching bin and the equipment box at the same time, and are communicated with the corresponding adapter elbows through a rotary joint.

[0014] Further, the output shaft of the reversing motor rotates through the front end of the equipment box and is fixedly connected with a rotating shaft, a plurality of spray pipes on the upper and lower sides and the corresponding rotating shafts are connected through transmission belts, and the upper and lower rotating shafts are also connected through transmission belts.

[0015] Further, the conveying group comprises chain wheels symmetrically arranged on the lower sides of each support frame, a roller chain is commonly sleeved on the chain wheels on the left and right sides, transmission shafts are commonly and symmetrically rotatably installed on the inner walls of the front and rear ends of the etching bin, a plurality of chain wheels are respectively fixedly sleeved on the corresponding transmission shafts, a servo motor is installed on the front end of the equipment box through a motor base, the output shaft of the servo motor rotates through the outer wall of the equipment box and is fixedly connected to any one of the transmission shafts.

[0016] Further, collection bins are symmetrically installed on the inner walls of the bottom ends of the equipment box, the collection bin on the left side is communicated with the etching bin through a communication pipe, the collection bin on the right side is communicated with the cleaning bin through a communication pipe, two support bars are commonly installed on the inner walls of the right ends of the equipment box and the cleaning bin and correspond to the front and rear support frames, a nozzle group for spraying clean water is further arranged on the cleaning bin, and the front and rear ends of the equipment box and the cleaning bin are provided with avoiding openings corresponding to the tooling plates.

[0017] Compared with the prior art, the technical scheme provided by the application has the following beneficial effects:

[0018] The multi-azimuth gradient positioning automobile multi-layer PCB etching system provided by the application is used for loading, first controls the synchronous rotation of the front and rear chain wheels through the servo motor, and then is conveyed to the front and rear support frames through the avoiding opening on the left end of the equipment box, under the conveying action of the front and rear chain wheels, the tooling plate and the automobile multi-layer PCB are uniformly slid to the right at a constant speed, until the tooling plate and the automobile multi-layer PCB slide along the front and rear support frames to the middle position of the etching bin, at this time, the external reflow device also places the tooling plate on which the automobile multi-layer PCB is placed on the front and rear support frames again and uniformly slides from left to right, the step-by-step conveying can adapt to any etching time length and is not affected by the conveying belt speed and the length of the etching chamber, and the occupied space is reduced.

[0019] When the tooling plate and the automobile multi-layer PCB plate slide to the middle position of the etching bin along the front and rear support frames, the servo motor controls the front and rear chain wheels to stop rotating, and then controls the electromagnets on the front and rear matching plates to start working. The front and rear electromagnets are respectively magnetically connected to the corresponding alignment magnets, so as to realize the butt joint of the tooling plate and the front and rear matching plates, and the magnetic attraction connection effect. At this time, the plurality of flow guide grooves on the front and rear matching plates are respectively connected to the corresponding butt joint holes on the tooling plate. During this period, the front and rear electromagnets also generate repulsive force on one end of the magnetic attraction structure of the same side left and right limiting plates. The plurality of limiting plates will again respectively extend into the corresponding sliding holes, so as to realize the effect of clamping and limiting the automobile multi-layer PCB plate. The problems of position deviation and vibration of the automobile multi-layer PCB plate during subsequent etching of the automobile multi-layer PCB plate are effectively avoided, which causes excessive or insufficient etching, and further causes the problem of copper short circuit of the automobile multi-layer PCB plate. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creating laborious work.

[0021] Figure 1 The figure is a schematic diagram of the three-dimensional structure in the embodiment of the present application.

[0022] Figure 2 The figure is a schematic diagram of the multi-angle three-dimensional structure in the embodiment of the present application.

[0023] Figure 3 The figure is a schematic diagram of the three-dimensional structure of the etching bin, the conveying and positioning part and the collection bin in the embodiment of the present application.

[0024] Figure 4 The figure is a schematic diagram of the three-dimensional structure of the nozzle group in the embodiment of the present application.

[0025] Figure 5 The figure is a schematic diagram of the three-dimensional structure of the conveying and positioning part in the embodiment of the present application.

[0026] Figure 6 The figure is a schematic diagram of the three-dimensional structure of the tooling plate and the limiting plate in the embodiment of the present application.

[0027] Figure 7 The figure is a schematic diagram of the three-dimensional structure of the matching plate and the discharge pipe in the embodiment of the present application.

[0028] Figure 8 The figure is a schematic diagram of the three-dimensional structure of the matching plate and the electromagnet in the embodiment of the present application.

[0029] Figure 9 Fig. 1 is a schematic view of the conveying position changing structure of the jig plate, the limiting plate and the matching plate in the embodiment of the present application.

[0030] The reference numerals in the figure represent respectively: 1, the equipment box; 2, the visual sealing cover; 3, the etching bin; 4, the cleaning bin; 5, the conveying positioning part; 51, the support frame; 52, the conveying group; 521, the chain wheel; 522, the roller chain; 523, the transmission shaft; 524, the servo motor; 53, the jig plate; 531, the limiting plate; 532, the support crosspiece; 54, the matching plate; 541, the discharge pipe; 55, the positioning group; 551, the alignment magnet; 552, the electromagnet; 6, the etching part; 61, the nozzle group; 611, the conveying pipe; 612, the connecting plate; 613, the spray pipe; 62, the rotating shaft; 63, the forward-reverse motor; 7, the collection bin. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiment of the present application more clear, the technical scheme in the embodiment of the present application will be described clearly and completely below in combination with the drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0032] The present application will be further described below in combination with the embodiments.

[0033] Embodiment:

[0034] Please refer to Figures 1-9 The present application provides a technical scheme: a multi-directional gradient positioning automobile multi-layer PCB etching system, comprising:

[0035] The equipment box 1 is provided with a visual sealing cover 2 at the upper end, and the etching bin 3 is installed on the inner wall of the equipment box 1. The cleaning bin 4 is also installed at the right end of the equipment box 1. The conveying positioning part 5 is provided on the equipment box 1 and the etching bin 3, and the etching part 6 is also provided on the equipment box 1 and the etching bin 3.

[0036] The conveying and positioning unit 5 includes a support frame 51 that is symmetrically installed at both ends of the inner walls of the equipment box 1 and the etching chamber 3. The upper end of the support frame 51 has a clearance groove. The equipment box 1 is provided with a conveying group 52 corresponding to the support frame 51. The upper ends of the support frames 51 on both the front and rear sides are slidably provided with a tooling plate 53. The tooling plate 53 has a U-shaped structure, and the two right angles on the right side of the tooling plate 53 are chamfered. The inner walls of the front and rear ends of the etching chamber 3 are symmetrically installed with mating plates 54. The right angles on the left side of the opposite ends of the two mating plates 54 are chamfered. The mating plates 54 on both the front and rear sides and the tooling plate 53 are provided with a positioning group 55.

[0037] The etching section 6 includes a nozzle assembly 61 located on the inner walls of the front and rear ends of the equipment box 1. A rotating shaft 62 is mounted on the upper end of the equipment box 1 via a bearing seat, and a forward and reverse motor 63 is mounted on the front end of the equipment box 1 below the rotating shaft 62 via a motor seat.

[0038] Limiting groups are provided on the inner walls of both the front and rear ends of the tooling plate 53. The limiting groups include sliding holes symmetrically opened on the inner wall of the tooling plate 53. The sliding holes are T-shaped. A limiting plate 531 is slidably installed on the inner wall of the sliding hole by a spring. The limiting plate 531 is T-shaped, and the end of the limiting plate 531 facing the outside of the tooling plate 53 is magnetically attached, while the end facing the inside of the tooling plate 53 is rounded. Supporting crossbars 532 are installed on the lower side of the inner walls of both the left and right ends of the tooling plate 53. Multiple filter holes are evenly distributed from front to back on the supporting crossbars 532.

[0039] The tooling plate 53 has multiple docking holes symmetrically opened on the inner walls of both the front and rear ends. The multiple docking holes are evenly distributed from left to right. The mating plate 54 has a guide groove opened on the end facing the tooling plate 53 corresponding to the multiple docking holes. The mating plate 54 also has a discharge cavity connected to the multiple guide grooves. The end of the mating plate 54 away from the tooling plate 53 is connected to a discharge pipe 541. The discharge pipe 541 consists of multiple connecting pipes and a main pipe. The main pipe of the discharge pipe 541 passes through both the etching chamber 3 and the equipment box 1.

[0040] The positioning group 55 includes alignment magnets 551 that are symmetrically embedded at both ends of the tooling plate 53. An electromagnet 552 is embedded at one end of the mating plate 54 facing the tooling plate 53, corresponding to the alignment magnets 551 and the limiting plate 531.

[0041] The nozzle group 61 comprises a conveying pipe 611 commonly installed at the front end of the equipment box 1 through two mounting plates, and the conveying pipe 611 is provided with connecting plates 612 on the upper and lower sides, respectively. The front end of the connecting plate 612 is communicated with the conveying pipe 611 through a plurality of adapter elbows uniformly distributed from left to right, and the corresponding positions of the plurality of adapter elbows on the connecting plate 612 are rotatably penetrated and mounted with spray pipes 613. The front ends of the plurality of spray pipes 613 are rotatably penetrated into the etching bin 3 and the equipment box 1 at the same time, and are communicated with the corresponding adapter elbows through rotary joints.

[0042] The output shaft of the forward and reverse motor 63 is rotatably penetrated into the front end of the equipment box 1 and fixedly connected with the rotating shaft 62. The plurality of spray pipes 613 on the upper and lower sides and the corresponding rotating shafts 62 are connected through transmission belts. The two rotating shafts 62 are also connected through transmission belts.

[0043] The conveying group 52 comprises chain wheels 521 symmetrically arranged on the left and right sides of each support frame 51. The chain wheels 521 on the left and right sides are commonly sleeved with a roller chain 522. Drive shafts 523 are rotatably penetrated and mounted on the inner walls of the front and rear ends of the etching bin 3. The plurality of chain wheels 521 are fixedly sleeved on the corresponding drive shafts 523. A servo motor 524 is installed on the front end of the equipment box 1 through a motor base. The output shaft of the servo motor 524 is rotatably penetrated into the outer wall of the equipment box 1 and fixedly connected to any one of the drive shafts 523.

[0044] The collecting bins 7 are symmetrically installed on the inner walls of the bottom ends of the equipment box 1. The left collecting bin 7 is communicated with the etching bin 3 through a communication pipe. The right collecting bin 7 is communicated with the cleaning bin 4 through a communication pipe. Two support bars are commonly installed on the inner walls of the right ends of the equipment box 1 and the cleaning bin 4 corresponding to the front and rear support frames 51. The cleaning bin 4 is also provided with a nozzle group 61 for spraying clean water. The front and rear ends of the equipment box 1 and the cleaning bin 4 are provided with avoiding openings corresponding to the tool plates 53.

[0045] In specific implementation:

[0046] Firstly, the conveying and positioning part 5 and the etching part 6 in the present application adopt a step-by-step conveying + nozzle independent swinging cooperation mode to intermittently spray and etch the automobile multi-layer PCB board. It should be noted that in the production process of the automobile multi-layer PCB board, the etched inner layer core plate, prepreg and outer layer copper foil are first laminated, and are fused to form a multi-layer structure under high temperature and high pressure. The whole plate after pressing is subjected to drilling, copper sinking and electroplating operations, and finally the surface circuit is formed through outer layer pattern transfer and etching.

[0047] When feeding, first control the connected transmission shaft 523 to drive the corresponding front and rear two sprockets 521 to rotate synchronously through the servo motor 524, and drive the other side of the front and rear two sprockets 521 and the transmission shaft 523 to rotate synchronously under the transmission action of the roller chain 522. It should be noted that the device box 1 outside is externally provided with a backflow device for recycling the tool plate 53. Since the backflow device is prior art, it will not be described in detail here. The backflow tool plate 53, which has the automobile multi-layer PCB board to be etched in advance, is placed by the externally provided backflow device. It should be further noted that the plurality of limiting plates 531 and the left and right two supporting cross bars 532 are made of corrosion-resistant rubber material to avoid damaging the automobile multi-layer PCB board, and the plurality of limiting plates 531 are initially only partially protruding into the corresponding sliding hole with a round corner treatment. During this period, the automobile multi-layer PCB board will extrude the corresponding plurality of limiting plates 531 to make them retract into the corresponding sliding hole, and they will be supported by the left and right two supporting cross bars 532. Then the plurality of limiting plates 531 will again protrude into the corresponding sliding hole under the action of the spring, thereby achieving the effect of preliminarily limiting and clamping the automobile multi-layer PCB board, and being conveyed to the front and rear two supporting frames 51 through the avoidance opening at the left end of the device box 1. Under the conveying action of the front and rear two sprockets 521, the tool plate 53 and the automobile multi-layer PCB board slide uniformly to the right until the tool plate 53 and the automobile multi-layer PCB board slide along the front and rear two supporting frames 51 to the middle position of the etching bin 3. At this time, the externally provided backflow device will again place the tool plate 53 with the automobile multi-layer PCB board placed in advance on the front and rear two supporting frames 51 and slide uniformly from left to right. The step-by-step conveying can adapt to any etching time, and is not affected by the speed of the conveyor belt and the length of the etching chamber, thereby reducing the occupied space.

[0048] When the tool plate 53 and the automobile multi-layer PCB board slide along the front and rear two supporting frames 51 to the middle position of the etching bin 3, the front and rear two sprockets 521 are controlled to stop rotating by the servo motor 524, and then the electromagnets 552 on the front and rear two matching plates 54 are controlled to start working. The front and rear two electromagnets 552 are respectively magnetically attracted to the corresponding alignment magnets 551, thereby achieving the effect of butt joint of the tool plate 53 and the front and rear two matching plates 54 and magnetic attraction connection. At this time, the plurality of flow guide grooves on the front and rear two matching plates 54 are respectively communicated with the corresponding butt joint holes on the tool plate 53. During this period, the front and rear two electromagnets 552 also generate a repulsive force on one end of the magnetic attraction structure of the same side left and right two limiting plates 531. The plurality of limiting plates 531 will again respectively protrude into the corresponding sliding hole, thereby achieving the effect of clamping and limiting the automobile multi-layer PCB board, effectively avoiding the problems of position deviation and vibration of the automobile multi-layer PCB board during subsequent etching of the automobile multi-layer PCB board, causing excessive or insufficient etching, and further causing the problem of residual copper short circuit of the automobile multi-layer PCB board.

[0049] When spray etching, under the driving of the transmission belt, the upper and lower rotating shafts 62 are controlled by the forward and reverse motor 63 to synchronously rotate forward and backward, the upper and lower rotating shafts 62 will drive the plurality of spray pipes 613 connected thereto to synchronously rotate forward and backward, so as to realize the effect that the plurality of spray pipes 613 on the upper and lower sides reciprocate forward and backward uniformly. Then, the etching liquid is delivered into the conveying pipe 611 by the external conveying pump, and the etching liquid is delivered into the plurality of spray pipes 613 on the upper and lower sides from the conveying pipe 611, and is sprayed onto the upper and lower end faces of the automobile multilayer PCB board by the plurality of nozzles on the spray pipes 613. During the spray etching, the plurality of spray pipes 613 on the lower side can avoid the generation of bubbles in the through holes during etching, and the reverse liquid flow is more likely to wash away the residues in the drill holes. Unlike the conventional frame type swing spray method, the upper and lower ends of the automobile multilayer PCB board can be etched simultaneously, and the swing amplitude and frequency can be controlled according to different areas to avoid local etching unevenness. In combination with the automobile multilayer PCB board in a stationary state, the etching accuracy is effectively improved.

[0050] In addition, when the plurality of nozzles spray the etching liquid onto the upper and lower end faces of the automobile multilayer PCB board, the front and rear vacuum pumps are respectively controlled to control the corresponding exhaust pipes 541, and the etching liquid on the upper and lower end faces of the automobile multilayer PCB board is sequentially subjected to negative pressure adsorption effect through the exhaust chamber, the plurality of flow guide grooves and the plurality of butt joints. For the etching liquid on the upper side of the automobile multilayer PCB board, the surface liquid can be quickly removed to reduce the risk of over-etching. For the etching liquid on the lower side of the automobile multilayer PCB board, because the residence time of the upper side spray etching liquid on the automobile multilayer PCB board is much longer than that of the lower side spray etching liquid, the negative pressure suction force generated by the plurality of butt joints can extract the etching liquid sprayed on the lower end face of the automobile multilayer PCB board, so as to increase the contact time of the etching liquid with the lower end face of the automobile multilayer PCB board as much as possible during the process of entering the butt joint, reduce the difference between the upper and lower sides of the spray etching, and effectively improve the etching efficiency of the automobile multilayer PCB board.

[0051] It should be noted that part of the waste liquid generated on the upper and lower sides will directly drop into the etching bin 3 under the action of sputtering or flow, and will be delivered into the left collection bin 7 through the communication pipe for centralized treatment. The waste liquid extracted by the front and rear exhaust pipes 541 through the corresponding exhaust chamber and the plurality of flow guide grooves will also be delivered into the left collection bin 7 through the external vacuum pump and the gas-liquid separation device.

[0052] After the spray etching is completed, the forward and reverse motors 63, the external conveying pump, and the front and rear electromagnets 552 are controlled to stop working in turn. After the multiple limiting plates 531 lose the repulsive force of the corresponding electromagnets 552, they will be retracted into the corresponding sliding holes under the action of the springs to restore to the original position. Then, the front and rear roller chains 522 are controlled to rotate synchronously again by the servo motor 524, so as to drive the spray-finished tool plate 53 and the automobile multi-layer PCB to continue to slide to the right until the next tool plate 53 and the automobile multi-layer PCB to be etched slide to the middle of the etching bin 3. The above-mentioned magnetic attraction positioning and spray etching steps are repeated, so that the upper and lower end faces of the automobile multi-layer PCB can be etched at the same time. The tool plate 53 and the automobile multi-layer PCB that have completed the spray etching will slide to the cleaning bin 4 during the sliding to the right. The clean water is conveyed into the conveying pipe 611 by the external conveying pump. The clean water is conveyed into the multiple spray pipes 613 on the upper and lower sides from the conveying pipe 611, and is sprayed onto the upper and lower end faces of the automobile multi-layer PCB from the multiple nozzles on the spray pipes 613, so as to clean the upper and lower end faces of the automobile multi-layer PCB. The generated wastewater is conveyed into the right collecting bin 7 through the communication pipe for centralized treatment. After cleaning, the tool plate 53 drives the automobile multi-layer PCB to be discharged from the avoiding opening at the right end of the cleaning bin 4, enters the external backflow device, and is taken out from below to above by the artificial or mechanical arm, so as to obtain the automobile multi-layer PCB that has completed the etching.

[0053] It should be noted that all parts in contact with the etching liquid in the present application are made of corrosion-resistant materials. The visible sealing cover 2 can close the two side covers during spray etching to achieve the effect of sealing and preventing the etching liquid from splashing and leaking.

[0054] In summary, the present application has the following advantages:

[0055] Advantage one: the multiple limiting plates 531 and the left and right two supporting horizontal bars 532 are made of corrosion-resistant rubber materials, so as to avoid damaging the automobile multi-layer PCB. When the automobile multi-layer PCB is placed, the multiple limiting plates 531 are retracted into the corresponding sliding holes by being pressed, and are supported by the left and right two supporting horizontal bars 532. The multiple limiting plates 531 are extended into the corresponding sliding holes again, so as to achieve the effect of preliminarily limiting and clamping the automobile multi-layer PCB.

[0056] Advantage two: during feeding, the front and rear roller chains 522 are controlled to rotate synchronously by the servo motor 524, so as to be conveyed to the front and rear supporting frames 51 from the avoiding opening at the left end of the equipment box 1, and drive the tool plate 53 and the automobile multi-layer PCB to slide to the right at a constant speed until the tool plate 53 and the automobile multi-layer PCB slide to the middle of the etching bin 3 along the front and rear supporting frames 51. The step-by-step conveying can adapt to any etching time, and is not affected by the conveying belt speed and the length of the etching chamber, so as to reduce the occupied space.

[0057] The third advantage is that when the tool plate 53 and the automobile multi-layer PCB plate slide to the middle position of the etching bin 3 along the front and rear support frames 51, the servo motor 524 controls the front and rear chain wheels 521 to stop rotating, and then controls the electromagnets 552 on the front and rear matching plates 54 to start working. The front and rear electromagnets 552 are respectively magnetically attracted to the corresponding alignment magnets 551, so as to realize the butt joint of the tool plate 53 and the front and rear matching plates 54, and the magnetic attraction effect. During this period, the front and rear electromagnets 552 also generate a repulsive force at one end of the magnetic attraction structure of the same side left and right limiting plates 531. The plurality of limiting plates 531 will again respectively extend into the corresponding sliding holes, so as to realize the effect of clamping and limiting the automobile multi-layer PCB plate, effectively avoiding the problems of position deviation and vibration of the automobile multi-layer PCB plate during subsequent etching of the automobile multi-layer PCB plate, causing excessive or insufficient etching, and further causing the problem of residual copper short circuit of the automobile multi-layer PCB plate.

[0058] The fourth advantage is that during the spraying etching, the forward and reverse motor 63 controls the upper and lower rotating shafts 62 to synchronously forward and reverse, so as to realize the effect of uniform forward and reverse reciprocating swing of the plurality of spraying pipes 613 on the upper and lower sides. Then, the plurality of nozzles on the spraying pipes 613 spray onto the upper and lower end faces of the corresponding automobile multi-layer PCB plate. During the spraying of the etching liquid, the plurality of spraying pipes 613 on the lower side can avoid the generation of bubbles in the holes during etching, and the reverse flow is more easy to wash away the residues in the holes. Unlike the conventional frame type swing spraying method, the upper and lower ends of the automobile multi-layer PCB plate can be sprayed and etched at the same time. The swing amplitude and frequency can be controlled according to different areas to avoid the problem of uneven local etching. In combination with the automobile multi-layer PCB plate in a stationary state, the etching precision is effectively improved.

[0059] The fifth advantage is that the front and rear vacuum pumps of the external device respectively control the corresponding discharge pipes 541, and sequentially pass through the discharge cavity, the plurality of flow guide grooves and the plurality of butt joint holes to generate a negative pressure adsorption effect on the etching liquid on the upper and lower end faces of the automobile multi-layer PCB plate. For the etching liquid on the upper side of the automobile multi-layer PCB plate, the surface liquid can be quickly removed to reduce the risk of over-etching. For the etching liquid on the lower side of the automobile multi-layer PCB plate, the etching liquid sprayed on the lower end face of the automobile multi-layer PCB plate can be extracted, so that the contact time of the etching liquid with the lower end face of the automobile multi-layer PCB plate is as long as possible during the passage into the butt joint hole, the difference between the upper and lower side spraying etching is reduced, and the etching efficiency of the automobile multi-layer PCB plate is effectively improved.

[0060] The sixth advantage is that after the spray etching is completed, the forward and reverse motors 63, the external conveying pump and the front and rear electromagnets 552 are controlled to stop working in sequence, then the front and rear roller chains 522 are controlled to rotate synchronously by the servo motor 524 again, the spray completed tool plate 53 and the automobile multi-layer PCB board are driven to continue to slide to the right, and the spray etched tool plate 53 and the automobile multi-layer PCB board will slide into the cleaning bin 4 during the sliding to the right, so that the upper and lower end surfaces of the automobile multi-layer PCB board can be cleaned by the multiple nozzles of the spray pipe 613.

[0061] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-azimuth gradient positioning automotive multi-layer PCB etching system, characterized by, The utility model relates to a kind of etching equipment, including: The equipment box (1) is equipped with etching bin (3) on the inner wall, and the right end of the equipment box (1) is also equipped with cleaning bin (4), and the equipment box (1) and etching bin (3) are provided with conveying positioning part (5) on the common, and the equipment box (1) and etching bin (3) are also provided with etching part (6) on the common; Wherein, the conveying positioning part (5) includes the support frame (51) that is symmetrically installed in front and back on the inner wall of the equipment box (1) and etching bin (3) left and right two ends, and the support frame (51) is left with a avoiding slot on the upper end, and the equipment box (1) is provided with conveying group (52) corresponding to the support frame (51), and the upper end of the support frame (51) on the front and back two sides is slidably provided with tool plate (53), and the tool plate (53) is the structure of back-shaped, and the inner wall of the etching bin (3) is symmetrically installed with cooperation plate (54) in the middle of the front and back two ends, and the cooperation plate (54) on the front and back two sides and tool plate (53) are provided with positioning group (55) on the common; Wherein, the etching part (6) includes nozzle group (61) located on the inner wall of the equipment box (1) on the common of front and back two ends, and the equipment box (1) is installed with rotating shaft (62) on the upper end through bearing seat, and the equipment box (1) is installed with forward and reverse motor (63) on the lower side of rotating shaft (62) through motor base on the front end; Wherein, the inner wall of the front and back two ends of the tool plate (53) is provided with limiting group, and the limiting group includes the sliding hole that is symmetrically opened on the inner wall of the tool plate (53) left and right, and the sliding hole is designed as T shape, and the limiting plate (531) is slidably installed on the inner wall of the sliding hole through spring, and the limiting plate (531) is T-shaped structure, and the end of the limiting plate (531) towards the outside of the tool plate (53) is magnetic attraction structure, and the end towards the inside of the tool plate (53) is rounded, and the inner wall of the left and right two ends of the tool plate (53) is installed with support cross strip (532) on the lower side, and a plurality of filter holes are opened on the support cross strip (532) and are evenly distributed from front to back; Wherein, the inner wall of the front and back two ends of the tool plate (53) is symmetrically opened with a plurality of butt joint holes, and the plurality of butt joint holes are evenly distributed from left to right, and the end of the cooperation plate (54) towards the tool plate (53) is provided with flow guide groove corresponding to the plurality of butt joint holes, and the cooperation plate (54) is further provided with discharge cavity communicated with the plurality of flow guide grooves, and the end of the cooperation plate (54) away from the tool plate (53) is communicated with discharge pipe (541), and the discharge pipe (541) is composed of a plurality of connecting pipelines and a main pipeline, and the main pipeline of the discharge pipe (541) penetrates the etching bin (3) and the equipment box (1) on the common.

2. The multi-azimuth gradient positioning automotive multi-layer PCB etching system of claim 1, wherein: The positioning group (55) includes the alignment magnet (551) that is symmetrically embedded on the front and back two ends of the tool plate (53), and the end of the cooperation plate (54) towards the tool plate (53) is embedded with electromagnet (552) corresponding to the alignment magnet (551) and limiting plate (531).

3. The multi-azimuth gradient positioning automotive multi-layer PCB etching system of claim 1, wherein: The nozzle group (61) comprises a conveying pipe (611) which is jointly installed at the front end of the equipment box (1) through two mounting plates, and the conveying pipe (611) is provided with connecting plates (612) on the upper and lower sides, respectively, the front end of the connecting plate (612) is communicated with the conveying pipe (611) through a plurality of adapter elbows which are uniformly distributed from left to right, and the corresponding positions of the plurality of adapter elbows on the connecting plate (612) are rotatably penetrated and mounted with spray pipes (613), the front ends of the plurality of spray pipes (613) are rotatably penetrated in the etching bin (3) and the equipment box (1), and are communicated with the corresponding adapter elbows through rotary joints.

4. The multi-azimuth gradient positioning automotive multi-layer PCB etching system of claim 1, wherein: The output shaft of the forward and reverse motor (63) is rotatably penetrated in the front end of the equipment box (1), and is fixedly connected with a rotating shaft (62), the plurality of spray pipes (613) on the upper and lower sides and the corresponding rotating shafts (62) are connected through transmission belts, and the upper and lower rotating shafts (62) are also connected through transmission belts.

5. The multi-azimuth gradient positioning automotive multi-layer PCB etching system of claim 1, wherein: The conveying group (52) comprises chain wheels (521) which are symmetrically arranged on the left and right sides of the lower side of each support frame (51), the chain wheels (521) on the left and right sides are jointly sleeved with roller chains (522), drive shafts (523) are rotatably penetrated and installed on the inner walls of the front and rear ends of the etching bin (3), the plurality of chain wheels (521) are fixedly sleeved on the corresponding drive shafts (523), a servo motor (524) is installed on the front end of the equipment box (1) through a motor base, the output shaft of the servo motor (524) is rotatably penetrated in the outer wall of the equipment box (1), and is fixedly connected to any one of the drive shafts (523).

6. The multi-azimuth gradient positioning automotive multi-layer PCB etching system of claim 5, wherein: The equipment box (1) is provided with collecting bins (7) which are symmetrically installed on the inner walls of the bottom ends, the left collecting bin (7) is communicated with the etching bin (3) through a communication pipe, the right collecting bin (7) is communicated with the cleaning bin (4) through a communication pipe, the front and rear support frames (51) are jointly installed on the inner walls of the right end of the equipment box (1) and the right end of the cleaning bin (4), the cleaning bin (4) is further provided with a nozzle group (61) for spraying clean water, and the front and rear ends of the equipment box (1) and the cleaning bin (4) are provided with avoiding openings corresponding to the tool plates (53).

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