Production and processing method of PCB (printed circuit board)
阅读说明:本技术 一种pcb印制电路板生产加工方法 (Production and processing method of PCB (printed circuit board) ) 是由 张波 周乾松 张同庆 于 2019-11-14 设计创作,主要内容包括:本发明属于PCB生产技术领域,具体的说是一种PCB印制电路板生产加工方法,该加工方法采用的水洗装置包括水池,水池中装有洗涤液和纯净水;水池上方设有一对轨道槽,轨道槽位于水池上方的部位向下凹陷呈弓形结构;轨道槽内设有行走小车,行走小车通过橡胶滚轮在轨道槽中滚动;橡胶滚轮通过其内部设置轮毂电机驱动,轮毂电机通过控制器连接电源;行走小车底部通过一组绳索固定有电路板;本发明通过行走小车向靠近水池的方向移动,进而通过绳索带动电路板移动,由于轨道槽位于水池上方的部位向下凹陷呈弓形结构,使得电路板呈倾斜状态进入水池中,进而加快电路板进入水池的速度,进而增加电路板的清洗效率。(The invention belongs to the technical field of PCB production, in particular to a PCB production processing method, wherein a water washing device adopted by the processing method comprises a water tank, and washing liquid and purified water are filled in the water tank; a pair of track grooves are arranged above the water pool, and the parts of the track grooves above the water pool are downwards sunken to form an arch structure; a walking trolley is arranged in the track groove and rolls in the track groove through a rubber roller; the rubber roller is driven by a hub motor arranged in the rubber roller, and the hub motor is connected with a power supply through a controller; the bottom of the walking trolley is fixed with a circuit board through a group of ropes; the circuit board is driven to move by the rope through the movement of the walking trolley in the direction close to the water pool, and the circuit board enters the water pool in an inclined state due to the fact that the part, above the water pool, of the track groove is sunken downwards to form an arch structure, so that the speed of the circuit board entering the water pool is increased, and the cleaning efficiency of the circuit board is improved.)
1. A PCB printed circuit board production processing method is characterized in that: the method comprises the following steps:
s1: baking the PCB after copper plating through an UV baking furnace, and then guiding the PCB into an oil removing groove for removing oil;
s2: guiding the PCB after oil removal into a washing device for multilevel washing treatment, then guiding the PCB into a microetching groove for microetching treatment, and then performing multilevel washing treatment again;
s3: guiding the PCB printed circuit board washed by the water in the step S2 into a pre-soaking tank for treatment, and then guiding the PCB printed circuit board into a silver-containing tin-depositing tank to form a tin-silver alloy layer on the surface of the copper layer of the PCB printed circuit board;
s4: introducing the PCB into a rinsing bath, rinsing the PCB at least once by utilizing thiourea, then introducing the PCB into a pure tin immersion bath, and forming a pure tin layer on the surface of a tin-silver alloy layer of the PCB;
s5: introducing the PCB into a post-tinning tank for treatment and carrying out multi-stage water washing;
s6: guiding the washed PCB into a post-soaking tank, performing post-soaking treatment by using a post-soaking agent, then performing two-stage washing treatment, and then continuously treating the PCB by using a tin-soaked post-soaking agent;
s7: carrying out multi-stage washing treatment on the PCB, and then drying and leading out to obtain a PCB tin-deposited product;
the water washing device adopted by the invention comprises a water tank (1), wherein washing liquid and purified water are filled in the water tank (1); a pair of track grooves (11) is arranged above the water pool (1), and the parts of the track grooves (11) above the water pool (1) are downwards sunken to form an arch structure; a walking trolley (12) is arranged in the track groove (11), and the walking trolley (12) rolls in the track groove (11) through a rubber roller (13); the rubber roller (13) is driven by a hub motor arranged in the rubber roller, and the hub motor is connected with a power supply through a controller; a circuit board (15) is fixed at the bottom of the walking trolley (12) through a group of ropes (14); the circuit board (15) enters the water tank (1) in an inclined mode and is immersed in the water tank (1) through the fact that the walking trolley (12) is matched with the track groove (11), the speed of the circuit board (15) entering the water tank (1) is increased, and then the cleaning efficiency of the circuit board (15) is improved.
2. The method for manufacturing a PCB according to claim 1, wherein the method comprises the following steps: a main water pipe (16) is arranged on one side of the water pool (1), the main water pipe (16) penetrates through the side wall of the water pool (1) and extends to the outside of the water pool (1), and one end, located outside the water pool (1), of the main water pipe (16) is communicated with a low-pressure water pipe (17); one end of the main water pipe (16) positioned in the water pool (1) is communicated with a group of spray pipes (18), and the spray pipes (18) are horizontally arranged and face the middle part of the water pool (1); purified water is sprayed out through the spray pipe (18) to impact the rope (14), so that the circuit board (15) swings, and the cleaning efficiency of the circuit board (15) is further improved.
3. The PCB production and processing method of claim 2, wherein: a water pump (2) is fixedly connected to one side of the outside of the water pool (1) far away from the main water pipe (16), and the water pump (2) is connected with a power supply through a controller; a water inlet pipe (21) of the water pump (2) penetrates through the side wall of the water pool (1) and goes deep into the water pool (1), and the axis of the water inlet pipe (21) is flush with the liquid level in the water pool (1); one end of the water inlet pipe (21) far away from the water pump (2) is fixedly connected with a flared opening (22), and an oil absorption filter screen (23) is arranged on the water inlet pipe (21) between the flared opening (22) and the water pump (2); a water outlet pipe (24) of the water pump (2) is communicated with the bottom of the water pool (1); the circulation of the washing liquid in the water tank (1) is increased through the water pump (2), and meanwhile, oil drops floating on the liquid surface are filtered, so that the cleaning efficiency of the circuit board (15) is further increased.
4. The PCB production and processing method of claim 2, wherein: the main water pipe (16) is connected with the water pool (1) in a sliding and sealing manner; one end of the low-pressure water pipe (17) close to the main water pipe (16) is communicated with a water-passing slip ring (25), and the water-passing slip ring (25) is connected with the main water pipe (16) in a sliding and sealing manner; the bottom of the water pool (1) on one side of the circuit board (15) far away from the spray pipe (18) is hinged with a baffle plate (26), and the middle part of the baffle plate (26) is fixedly connected with a pull rope (27); a guide wheel (28) is rotatably connected inside the water tank (1) below the main water pipe (16), and one end of the pull rope (27) far away from the baffle plate (26) bypasses the guide wheel (28) and then is fixedly connected with the spray pipe (18); a reverse punching hole (29) is arranged below the spray pipe (18), and the reverse punching hole (29) is used for assisting the spray pipe (18) to restore to the horizontal position; the circuit board (15) impacts the baffle (26) to drive the spray pipe (18) to rotate downwards, so that purified water sprayed out of the spray pipe (18) is driven to stir washing liquid, and the washing efficiency of the circuit board (15) is further improved.
5. The method for manufacturing a PCB according to claim 1, wherein the method comprises the following steps: a group of wavy bulges (3) are arranged in the section, sunken downwards, of the track groove (11), and the circuit board (15) is driven to move up and down through the walking trolley (12) when passing through the bulges (3), so that the cleaning efficiency of the circuit board (15) is further improved.
6. The PCB manufacturing method of claim 5, wherein: a sliding hole (31) is formed in the position, close to the water pump (2), of the track groove (11); the water-passing slip ring (25) is communicated with a high-pressure water pipe (32) through a one-way valve, and high-pressure water is passed through the high-pressure water pipe (32); the low-pressure water pipe (17) is provided with a one-way valve for preventing water return; a valve is arranged at the position of the high-pressure water pipe (32) corresponding to the sliding hole (31), and a control rod (33) of the valve is connected with the sliding hole (31) in a sliding manner; one end of the control rod (33) positioned in the sliding track groove (11) is fixedly connected with a first plate (34), and the first plate (34) is parallel to the track groove (11); two sides of the first plate (34) are connected with the rail groove (11) through inclined elastic rails (35); a plate (34) is extruded through the rubber roller (13) so that high-pressure water is introduced into the main water pipe (16), and then the circuit board (15) separated from the water pool (1) is washed, water is saved, and the cleaning efficiency of the circuit board (15) is further improved.
Technical Field
The invention belongs to the technical field of PCB production, and particularly relates to a PCB production and processing method.
Background
Disclosure of Invention
The invention provides a PCB printed circuit board production processing method, which aims to make up the defects of the prior art and solve the problems that tin melting products in the prior art are frequently controlled and poor in soldering tin, and meanwhile, the PCB printed circuit board production processing method has the problems of low washing efficiency, high water consumption and difficulty in reducing production cost.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a PCB printed circuit board production processing method, which comprises the following steps:
s1: baking the PCB after copper plating through an UV baking furnace, and then guiding the PCB into an oil removing groove for removing oil;
s2: guiding the PCB after oil removal into a washing device for multilevel washing treatment, then guiding the PCB into a microetching groove for microetching treatment, and then performing multilevel washing treatment again;
s3: guiding the PCB printed circuit board washed by the water in the step S2 into a pre-soaking tank for treatment, and then guiding the PCB printed circuit board into a silver-containing tin-depositing tank to form a tin-silver alloy layer on the surface of the copper layer of the PCB printed circuit board;
s4: introducing the PCB into a rinsing bath, rinsing the PCB at least once by utilizing thiourea, then introducing the PCB into a pure tin immersion bath, and forming a pure tin layer on the surface of a tin-silver alloy layer of the PCB;
s5: introducing the PCB into a post-tinning tank for treatment and carrying out multi-stage water washing;
s6: guiding the washed PCB into a post-soaking tank, performing post-soaking treatment by using a post-soaking agent, then performing two-stage washing treatment, and then continuously treating the PCB by using a tin-soaked post-soaking agent;
s7: carrying out multi-stage washing treatment on the PCB, and then drying and leading out to obtain a PCB tin-deposited product;
the water washing device adopted by the invention comprises a water tank, wherein washing liquid and purified water are filled in the water tank; a pair of track grooves is arranged above the water pool, and the parts of the track grooves above the water pool are downwards sunken to form an arch structure; a walking trolley is arranged in the track groove and rolls in the track groove through a rubber roller; the rubber roller is driven by a hub motor arranged in the rubber roller, and the hub motor is connected with a power supply through a controller; the bottom of the walking trolley is fixed with a circuit board through a group of ropes; the circuit board is obliquely entered into and immersed in the water pool by matching the walking trolley with the rail groove, so that the speed of the circuit board entering the water pool is increased, and the cleaning efficiency of the circuit board is further increased; during the use, rotate through controller control in-wheel motor, drive the walking dolly and remove to the direction that is close to the pond, and then drive the circuit board through the rope and remove, because the position undercut of track groove position in pond top is bow-shaped structure for the circuit board is the inclined state and gets into in the pond, and then accelerates the speed that the circuit board got into the pond, and then increases the cleaning efficiency of circuit board.
Preferably, a main water pipe is arranged on one side of the water pool, penetrates through the side wall of the water pool and extends to the outside of the water pool, and one end, located outside the water pool, of the main water pipe is communicated with the low-pressure water pipe; one end of the main water pipe, which is positioned in the water tank, is communicated with a group of spray pipes, and the spray pipes are horizontally arranged and face the middle part of the water tank; pure water is sprayed out through the spray pipe to impact the rope, so that the circuit board swings, and the cleaning efficiency of the circuit board is further increased; after the circuit board got into the pond through the drive of walking dolly, wasing the circuit board through the detergent, let in the pure water through low pressure water pipe to main water pipe this moment, the pure water is through the spray tube blowout, and the pure water strikes the rope for the rope drives the swing back and forth of circuit board in the pond, and the detergent in the pure water drive pond of blowout simultaneously constantly stirs, further increases the cleaning performance of detergent to the circuit board.
Preferably, one side of the outside of the water pool, which is far away from the main water pipe, is fixedly connected with a water pump, and the water pump is connected with a power supply through a controller; a water inlet pipe of the water pump penetrates through the side wall of the water tank and extends into the water tank, and the axis of the water inlet pipe is flush with the liquid level in the water tank; one end of the water inlet pipe, which is far away from the water pump, is fixedly connected with a flared opening in a horn shape, and an oil absorption filter screen is arranged on the water inlet pipe between the flared opening and the water pump; a water outlet pipe of the water pump is communicated with the bottom of the water pool; the circulation of the washing liquid in the water tank is increased through the water pump, and meanwhile, oil drops floating on the liquid surface are filtered, so that the washing efficiency of the circuit board is further increased; the controller controls the water pump to work, the water pump pumps the detergent in the water tank through the water inlet pipe and then flows back into the water tank through the water outlet pipe, the circulation speed of the detergent in the water tank is further increased, the content of impurities in the detergent near the circuit board is further reduced, and the cleaning efficiency of the circuit board is further increased; meanwhile, oil stains adhered to the circuit board float on the surface of the detergent after being cleaned by the detergent, are sucked into the water inlet pipe through the flaring and then are adsorbed by the oil absorption filter screen, so that the content of floating oil drops in the water tank is reduced, and the cleaning efficiency of the circuit board is further improved.
Preferably, the main water pipe is connected with the pool in a sliding and sealing manner; one end of the low-pressure water pipe close to the main water pipe is communicated with a water-through slip ring, and the water-through slip ring is connected with the main water pipe in a sliding and sealing manner; the bottom of the water pool on one side of the circuit board, which is far away from the spray pipe, is hinged with a baffle, and the middle part of the baffle is fixedly connected with a pull rope; the interior of the water tank below the main water pipe is rotatably connected with a guide wheel, and one end of the pull rope, which is far away from the baffle plate, is fixedly connected with the spray pipe after bypassing the guide wheel; a back-flushing hole is arranged below the spray pipe and used for assisting the spray pipe to restore to the horizontal position; the circuit board impacts the baffle plate to drive the spray pipe to rotate downwards, so that purified water sprayed out of the spray pipe is driven to stir the washing liquid, and the washing efficiency of the circuit board is further improved; when the circuit board during the drive of spray tube spun rivers swings in the pond, circuit board striking baffle, pulling stay cord when the baffle rotates, and then drive the main water pipe and rotate, make the spray tube rotate downwards, make the spray tube rotate the back and drive the downward blowout of rivers slant, increase the impact of rivers to washing liquid in the pond, further increase the cleaning efficiency of circuit board, spray tube spun rivers accelerate on the surface of water that the superficial oil drips to the speed of being close to flaring direction motion simultaneously, further increase the adsorption rate that the superficial oil drips in the pond, and then further increase the cleaning efficiency of circuit board.
Preferably, a group of wavy bulges are arranged in the section of the track groove which is sunken downwards, and the circuit board is driven to move up and down by the walking trolley when passing through the bulges, so that the cleaning efficiency of the circuit board is further improved; when the walking trolley passes through the protrusion, the walking trolley drives the circuit board to move up and down in the water pool, so that the flowing speed of the detergent on the surface of the circuit board is further increased, and the cleaning efficiency of the circuit board is further increased.
Preferably, a sliding hole is formed in the position, close to the water pump, of the track groove; the water-passing slip ring is communicated with a high-pressure water pipe through a one-way valve, and high-pressure water is introduced into the high-pressure water pipe; the low-pressure water pipe is provided with a one-way valve for preventing water return; a valve is arranged at the position of the high-pressure water pipe corresponding to the sliding hole, and a control rod of the valve is connected with the sliding hole in a sliding manner; one end of the control rod, which is positioned in the sliding rail groove, is fixedly connected with a first plate, and the first plate is parallel to the rail groove; two sides of the first plate are connected with the track grooves through inclined elastic tracks; the first plate is extruded by the rubber roller, so that high-pressure water is introduced into the main water pipe, the circuit board separated from the water tank is washed, water is saved, and the cleaning efficiency of the circuit board is further improved; after the circuit board washs in the pond, bring out the circuit board from the pond through walking dolly cooperation track groove, rubber roller extrudees a board this moment, and then drive the control lever and slide down and open high-pressure water pipe, high pressure water in the high-pressure water pipe is from the spray tube blowout behind water slip ring and the main water pipe, highly compressed water spouts the circuit board after the spray tube blowout, further increase the washing to the circuit board, the washing to the circuit board through the high pressure water of short time, when guaranteeing the cleanliness factor of circuit board, practice thrift the water consumption of washing the circuit board, further increase the cleaning efficiency of circuit board.
The invention has the following beneficial effects:
1. according to the PCB production processing method, the controller controls the hub motor to rotate, the walking trolley is driven to move towards the direction close to the water pool, the circuit board is driven to move through the rope, and the part of the track groove above the water pool is sunken downwards to form an arch structure, so that the circuit board enters the water pool in an inclined state, the speed of the circuit board entering the water pool is increased, and the cleaning efficiency of the circuit board is increased.
2. According to the PCB production processing method, when the walking trolley passes through the protrusion, the walking trolley drives the circuit board to move up and down in the water pool, so that the flowing speed of the detergent on the surface of the circuit board is further increased, and the cleaning efficiency of the circuit board is further increased.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a perspective view of a water washing apparatus used in the present invention;
FIG. 3 is a partial cross-sectional view of a water wash apparatus for use with the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is an enlarged view of a portion of FIG. 3 at B;
FIG. 6 is an enlarged view of a portion of FIG. 3 at C;
FIG. 7 is an enlarged view of a portion of FIG. 3 at D;
in the figure: the water tank comprises a
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 7, the method for manufacturing and processing a PCB according to the present invention comprises the following steps:
s1: baking the PCB after copper plating through an UV baking furnace, and then guiding the PCB into an oil removing groove for removing oil;
s2: guiding the PCB after oil removal into a washing device for multilevel washing treatment, then guiding the PCB into a microetching groove for microetching treatment, and then performing multilevel washing treatment again;
s3: guiding the PCB printed circuit board washed by the water in the step S2 into a pre-soaking tank for treatment, and then guiding the PCB printed circuit board into a silver-containing tin-depositing tank to form a tin-silver alloy layer on the surface of the copper layer of the PCB printed circuit board;
s4: introducing the PCB into a rinsing bath, rinsing the PCB at least once by utilizing thiourea, then introducing the PCB into a pure tin immersion bath, and forming a pure tin layer on the surface of a tin-silver alloy layer of the PCB;
s5: introducing the PCB into a post-tinning tank for treatment and carrying out multi-stage water washing;
s6: guiding the washed PCB into a post-soaking tank, performing post-soaking treatment by using a post-soaking agent, then performing two-stage washing treatment, and then continuously treating the PCB by using a tin-soaked post-soaking agent;
s7: carrying out multi-stage washing treatment on the PCB, and then drying and leading out to obtain a PCB tin-deposited product;
the water washing device adopted by the invention comprises a
As an embodiment of the invention, one side of the
As an embodiment of the invention, one side of the outside of the
In one embodiment of the present invention, the
As an embodiment of the invention, a group of
In one embodiment of the present invention, a
When the cleaning device is used, the controller controls the hub motor to rotate, the
The front, the back, the left, the right, the upper and the lower are all based on the figure 2 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
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