CN110708882A - Production and processing method of PCB (printed circuit board) - Google Patents
Production and processing method of PCB (printed circuit board) Download PDFInfo
- Publication number
- CN110708882A CN110708882A CN201911110426.1A CN201911110426A CN110708882A CN 110708882 A CN110708882 A CN 110708882A CN 201911110426 A CN201911110426 A CN 201911110426A CN 110708882 A CN110708882 A CN 110708882A
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- Prior art keywords
- water
- circuit board
- pcb
- pipe
- pool
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/26—Cleaning or polishing of the conductive pattern
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/24—Reinforcing the conductive pattern
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/07—Treatments involving liquids, e.g. plating, rinsing
- H05K2203/0756—Uses of liquids, e.g. rinsing, coating, dissolving
- H05K2203/0766—Rinsing, e.g. after cleaning or polishing a conductive pattern
Abstract
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.
Description
Technical Field
The invention belongs to the technical field of PCB production, and particularly relates to a PCB production and processing method.
Background
In the prior art, a tin melting liquid medicine is added with a silver-containing additive at a full tin precipitation tank section to form a tin-silver alloy layer, and the purpose of silver is to inhibit tin whisker growth; compared with a pure tin layer, the tin-silver alloy layer has the risk of accidental tin shrinkage and influences the soldering capacity, but the pure tin layer cannot inhibit the growth of tin whiskers.
The tin melting product in the prior art is occasionally generated on the problems of tin whisker control and poor soldering. The problem of sinking tin product among the prior art, need solve tin palpus suppression and soldering tin harmfully simultaneously, both need restrain the tin palpus, also reduce the tin risk of contracting, improve the soldering tin nature of tin product, become the problem that awaits a urgent solution, simultaneously, the washing efficiency is lower in PCB printed circuit board production process, and the water consumption is great, is difficult to reduction in production cost.
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 water tank 1, a track groove 11, a walking trolley 12, rubber rollers 13, a rope 14, a circuit board 15, a main water pipe 16, a low-pressure water pipe 17, a spray pipe 18, a water pump 2, a water inlet pipe 21, a flaring 22, an oil absorption filter screen 23, a water outlet pipe 24, a water through slip ring 25, a baffle 26, a pull rope 27, a guide wheel 28, a reverse punching hole 29, a protrusion 3, a sliding hole 31, a high-pressure water pipe 32, a control rod 33, a first plate 34 and an elastic track 35.
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 water tank 1, wherein washing liquid and purified water are filled in the water tank 1; a pair of track grooves 11 are 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 obliquely enters and is immersed in the water pool 1 by matching the walking trolley 12 with the track groove 11, so that the speed of the circuit board 15 entering the water pool 1 is increased, and the cleaning efficiency of the circuit board 15 is further increased; during the use, rotate through controller control in-wheel motor, drive walking dolly 12 and remove to the direction that is close to pond 1, and then drive circuit board 15 through rope 14 and remove, because the position undercut that track groove 11 is located pond 1 top is bow-shaped structure for circuit board 15 is the tilt state and gets into in the pond 1, and then accelerates circuit board 15 to get into the speed in pond 1, and then increases circuit board 15's cleaning efficiency.
As an embodiment of the invention, one side of the pool 1 is provided with a main water pipe 16, the main water pipe 16 penetrates through the side wall of the pool 1 and extends to the outside of the pool 1, and one end of the main water pipe 16, which is positioned outside the pool 1, is communicated with a low-pressure water pipe 17; one end of the main water pipe 16, which is 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; pure 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; after circuit board 15 gets into pond 1 through the drive of walking dolly 12, wash circuit board 15 through the detergent, let in the pure water through low pressure water pipe 17 to main water pipe 16 this moment, the pure water is spout through spray tube 18, and pure water impact rope 14 for rope 14 drives circuit board 15 and makes a round trip to swing in pond 1, and the pure water of blowout simultaneously drives the detergent in pond 1 and constantly stirs, further increases the cleaning performance of detergent to circuit board 15.
As an embodiment of the invention, one side of the outside of the pool 1, which is far away from the main water pipe 16, is fixedly connected with a water pump 2, 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 extends 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, which is 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 washing efficiency of the circuit board 15 is further increased; the water pump 2 is controlled by the controller to work, the water pump 2 pumps the detergent in the water tank 1 through the water inlet pipe 21 and then flows back into the water tank 1 through the water outlet pipe 24, the circulation speed of the detergent in the water tank 1 is further increased, the content of impurities in the detergent near the circuit board 15 is further reduced, and the cleaning efficiency of the circuit board 15 is further increased; meanwhile, oil stains adhered to the circuit board 15 float on the surface of the detergent after being cleaned by the detergent, are sucked into the water inlet pipe 21 through the flaring 22 and then are adsorbed by the oil absorption filter screen 23, so that the content of the floating oil drops in the water tank 1 is reduced, and the cleaning efficiency of the circuit board 15 is further improved.
In one embodiment of the present invention, the main water pipe 16 is connected with the 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-through slip ring 25, and the water-through 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, which is far away from the spray pipe 18, is hinged with a baffle 26, and the middle part of the baffle 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 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 the washing liquid, and the washing efficiency of the circuit board 15 is further improved; when circuit board 15 during the swing in pond 1 under the drive of spray tube 18 spun water stream, circuit board 15 striking baffle 26, pulling stay cord 27 when baffle 26 rotates, and then drive main water pipe 16 and rotate, make spray tube 18 rotate downwards, make spray tube 18 rotate the back and drive the downward blowout of rivers slant, increase the impact of rivers to washing liquid in the pond 1, further increase circuit board 15's cleaning efficiency, spray tube 18 spun rivers accelerate on the surface of water that floated oil drips to the speed of being close to the motion of flaring 22 direction, further increase the adsorption velocity of floated oil drip in the pond 1, and then further increase circuit board 15's cleaning efficiency.
As an embodiment of the invention, a group of wavy protrusions 3 is arranged in a section of the track groove 11 recessed downwards, and the circuit board 15 is driven to move up and down by the walking trolley 12 passing through the protrusions 3, so that the cleaning efficiency of the circuit board 15 is further increased; when the walking trolley 12 passes through the protrusion 3, the walking trolley 12 drives the circuit board 15 to move up and down in the water tank 1, so that the flowing speed of the detergent on the surface of the circuit board 15 is further increased, and the cleaning efficiency of the circuit board 15 is further increased.
In one embodiment of the present invention, a sliding hole 31 is provided at a position of the track groove 11 close to the water pump 2; 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 communicated in 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 slide hole 31, and a control rod 33 of the valve is connected with the slide hole 31 in a sliding manner; one end of the control rod 33, which is positioned in the sliding track groove 11, is fixedly connected with a first plate 34, and the first plate 34 is parallel to the sliding track groove 11; two sides of the first plate 34 are connected with the rail groove 11 through inclined elastic rails 35; the first plate 34 is extruded by the rubber roller 13, so that high-pressure water is introduced into the main water pipe 16, the circuit board 15 separated from the water tank 1 is washed, water is saved, and the cleaning efficiency of the circuit board 15 is further improved; after the circuit board 15 is cleaned in the water tank 1, the circuit board 15 is taken out from the water tank 1 through the walking trolley 12 matched with the rail groove 11, the rubber roller 13 extrudes the first plate 34 at the moment, the control rod 33 is further driven to slide downwards, the high-pressure water pipe 32 is opened, high-pressure water in the high-pressure water pipe 32 is sprayed out from the spray pipe 18 after passing through the water-passing sliding ring 25 and the main water pipe 16, the high-pressure water is sprayed out from the spray pipe 18 and then sprayed onto the circuit board 15, the washing of the circuit board 15 is further increased, the circuit board 15 is washed through the high-pressure water in a short time, the cleanliness of the circuit board 15 is guaranteed, the water consumption for washing the circuit board 15 is saved, and the cleaning efficiency.
When the cleaning device is used, the controller controls the hub motor to rotate, the walking trolley 12 is driven to move towards the direction close to the water pool 1, the circuit board 15 is driven to move through the rope 14, and the part, above the water pool 1, of the track groove 11 is downwards sunken to form an arch structure, so that the circuit board 15 enters the water pool 1 in an inclined state, the speed of the circuit board 15 entering the water pool 1 is increased, and the cleaning efficiency of the circuit board 15 is increased; after the circuit board 15 enters the water tank 1 under the driving of the walking trolley 12, the circuit board 15 is cleaned by detergent, purified water is introduced into a main water pipe 16 through a low-pressure water pipe 17, the purified water is sprayed out through a spray pipe 18, the purified water impacts a rope 14, so that the rope 14 drives the circuit board 15 to swing back and forth in the water tank 1, meanwhile, the sprayed purified water drives the detergent in the water tank 1 to turn over continuously, and the cleaning effect of the detergent on the circuit board 15 is further improved; the water pump 2 is controlled by the controller to work, the water pump 2 pumps the detergent in the water tank 1 through the water inlet pipe 21 and then flows back into the water tank 1 through the water outlet pipe 24, the circulation speed of the detergent in the water tank 1 is further increased, the content of impurities in the detergent near the circuit board 15 is further reduced, and the cleaning efficiency of the circuit board 15 is further increased; meanwhile, oil stains adhered to the circuit board 15 float on the surface of the detergent after being cleaned by the detergent, are sucked into the water inlet pipe 21 through the flaring 22 and then are adsorbed by the oil absorption filter screen 23, so that the content of the floating oil drops in the water tank 1 is reduced, and the cleaning efficiency of the circuit board 15 is further improved; when the circuit board 15 swings in the water tank 1 under the driving of water flow sprayed by the spray pipe 18, the circuit board 15 impacts the baffle 26, the pull rope 27 is pulled when the baffle 26 rotates, and then the main water pipe 16 is driven to rotate, so that the spray pipe 18 rotates downwards, and the water flow is driven to spray downwards obliquely after the spray pipe 18 rotates, so that the impact effect of the water flow on washing liquid in the water tank 1 is increased, the washing efficiency of the circuit board 15 is further increased, meanwhile, the water flow sprayed by the spray pipe 18 accelerates the speed of oil drops floating on the water surface to move towards the direction close to the flared opening 22, the adsorption speed of the oil drops floating in the water tank 1 is further increased, and the washing efficiency of the circuit; when the walking trolley 12 passes through the protrusion 3, the walking trolley 12 drives the circuit board 15 to move up and down in the water pool 1, so that the flowing speed of the detergent on the surface of the circuit board 15 is further increased, and the cleaning efficiency of the circuit board 15 is further increased; after the circuit board 15 is cleaned in the water tank 1, the circuit board 15 is taken out from the water tank 1 through the walking trolley 12 matched with the rail groove 11, the rubber roller 13 extrudes the first plate 34 at the moment, the control rod 33 is further driven to slide downwards, the high-pressure water pipe 32 is opened, high-pressure water in the high-pressure water pipe 32 is sprayed out from the spray pipe 18 after passing through the water-passing sliding ring 25 and the main water pipe 16, the high-pressure water is sprayed out from the spray pipe 18 and then sprayed onto the circuit board 15, the washing of the circuit board 15 is further increased, the circuit board 15 is washed through the high-pressure water in a short time, the cleanliness of the circuit board 15 is guaranteed, the water consumption for washing the circuit board 15 is saved, and the cleaning efficiency.
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.
Claims (6)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911110426.1A CN110708882A (en) | 2019-11-14 | 2019-11-14 | Production and processing method of PCB (printed circuit board) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911110426.1A CN110708882A (en) | 2019-11-14 | 2019-11-14 | Production and processing method of PCB (printed circuit board) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110708882A true CN110708882A (en) | 2020-01-17 |
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ID=69205977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911110426.1A Withdrawn CN110708882A (en) | 2019-11-14 | 2019-11-14 | Production and processing method of PCB (printed circuit board) |
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| Country | Link |
|---|---|
| CN (1) | CN110708882A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112040663A (en) * | 2020-09-01 | 2020-12-04 | 广州共望贸易有限公司 | Multistage deoiling washing integrated device of PCB printed circuit board |
| CN115125593A (en) * | 2022-06-01 | 2022-09-30 | 生益电子股份有限公司 | Application of chelating agent in PCB preparation |
-
2019
- 2019-11-14 CN CN201911110426.1A patent/CN110708882A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112040663A (en) * | 2020-09-01 | 2020-12-04 | 广州共望贸易有限公司 | Multistage deoiling washing integrated device of PCB printed circuit board |
| CN115125593A (en) * | 2022-06-01 | 2022-09-30 | 生益电子股份有限公司 | Application of chelating agent in PCB preparation |
| CN115125593B (en) * | 2022-06-01 | 2023-12-05 | 生益电子股份有限公司 | Application of chelating agent in PCB preparation |
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