Immersion gold sandblasting device and immersion gold sandblasting method for circuit board

Abstract

The present invention belongs to the technical field of gold immersion blasting of circuit boards, specifically a gold immersion blasting device for circuit boards, comprising a frame and two sets of chains, two sets of transmission shafts rotating in the frame, two sets of sprockets being installed on the transmission shafts, each set of chains meshing with the two sets of sprockets, a number of discharge components being arranged around the chains, a sandblasting mechanism being arranged above the frame, and a conveyor belt being arranged below the frame, the sandblasting mechanism comprising a transparent cover, side plates being fixed at both ends of the transparent cover, the lower ends of the side plates being fixedly connected to the frame, a feeding chute for the discharge component to pass through being provided at the lower ends of the side plates, a rectangular slot being provided on the discharge component, and during the process of the discharge component continuously passing through the sandblasting mechanism, a closed space is formed by multiple sets of discharge components, two sets of side plates, the transparent cover, two sets of sealing edge strips and a dust filter bag, so that sand splashed in the closed space will only fall into the dust filter bag, thereby greatly reducing the sand splashing to the outside, not only reducing the waste of sand, but also greatly reducing the pollution of the sand to the external environment.

Description

Technical Field

[0001] The invention belongs to the technical field of immersion gold sandblasting of circuit boards, in particular to an immersion gold sandblasting device and a immersion gold sandblasting method for circuit boards. Background Art

[0002] The immersion gold process of circuit boards is also called the gold plating process. Before gold plating the circuit boards, the surface of the circuit boards needs to be cleaned of debris and the roughness needs to be increased. Currently, the surface of the circuit boards is sandblasted by a sandblasting machine, which can not only quickly clean the debris on the surface of the circuit boards, but also create tiny bumps on the surface of the circuit boards, thereby increasing the surface roughness and actual surface area. This helps to increase the contact area between the gold-plated layer and the substrate and enhance adhesion. Therefore, sandblasting is an important step before gold plating of circuit boards.

[0003] The patent with announcement number CN217619992U discloses a sandblasting machine for immersion gold printing of circuit boards, which includes a frame with a support plate on the top; a flat shell is provided on the support plate, a hopper is provided on the flat shell, the lower end of the hopper is connected to a feeding mechanism, the feeding mechanism is connected to a sandblasting pipeline, two sets of recovery hoppers are symmetrically provided below the flat shell, and multiple sets of rollers are rotatably installed on the support plate. The setting of the feeding mechanism solves the problem that the hopper is prone to blockage and affects the normal operation of the sandblasting machine. Secondly, the sand sprayed out by the sandblasting gun for grinding the circuit board will fall into the recovery hopper, thereby realizing the recycling and reuse of the grinding sand.

[0004] In the above scheme, during the process of sandblasting the circuit board with a sandblasting gun, since the area where the circuit board and the sandblasting gun are located is not sealed, some of the frosted sand will fly out of the frame with the airflow, which will not only make the surrounding environment dusty and affect the work and health of the staff, but also cause a large amount of frosted sand to be wasted; for this reason, the present invention provides a circuit board immersion gold sandblasting device and an immersion gold sandblasting method. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a circuit board immersion gold sandblasting device described in the present invention comprises a frame and two sets of chains, two sets of transmission shafts are rotated in the frame, two sets of sprockets are installed on the transmission shaft, and each set of chains meshes with the two sets of sprockets, and several sets of discharge assemblies are arranged around the chains. A sandblasting mechanism is arranged above the frame, and a conveyor belt is arranged under the frame. The sandblasting mechanism comprises a transparent cover, side plates are fixed at both ends of the transparent cover, and the lower end of the side plates is fixedly connected to the frame, and a material passing chute for the discharge assembly to pass through is provided at the lower end of the side plates. A rectangular slot is provided on the discharge assembly, dust filter bags are provided on both sides of the lower end of the transparent cover, and two sets of spray guns are fixedly installed on the upper end of the transparent cover, and the upper ends of the two sets of spray guns are connected to air pipes, and the two sets of lower ports of the storage barrel are respectively connected to the two sets of sand feeding mechanisms, and the sand feeding mechanisms are connected to the spray guns, and two sets of sealing edge strips for guiding the discharge assembly are provided between the two sets of side plates;

[0007] During the continuous passing of the discharge assembly through the sandblasting mechanism, a closed space is formed by multiple discharge assemblies, two sets of side panels, a transparent cover, two sets of sealing edge strips, and a dust filter bag. The abrasive splashed in the closed space will only fall into the dust filter bag, greatly reducing the abrasive splashing to the outside world, which not only reduces the waste of abrasive, but also greatly reduces the pollution of the abrasive to the external environment.

[0008] Preferably, the discharge assembly includes a base, two sets of chains are fixedly connected to the bottom of the base, two sets of guide blocks movably installed on the base, a movable block fixedly connected to the guide blocks, the two sets of movable blocks are merged into a rectangular groove, the two sets of movable blocks are both plugged into the movable plate, a movable column fixedly connected to the lower end of the movable plate, a spring sleeved on the movable column, a guide groove is provided on the base, the two sets of guide blocks are slidably connected to the guide groove, two sets of oblique grooves are provided on the movable plate, a pin is provided in the oblique groove, the pin is fixedly installed in the guide block, a guide plate is provided between the two sets of transmission shafts, an oblique surface and a step are provided on the outer ring of the guide plate, a roller is rotatably installed on the lower end of the movable column, and the roller is rotatably connected to the outer ring of the guide plate;

[0009] Under the guidance of the oblique groove, the two sets of pins drive the two sets of guide blocks to move toward each other along the guide groove. The two sets of guide blocks merge the two sets of movable blocks, so that the edge of the circuit board is close to the inner wall of the rectangular groove, preventing fine frosting from entering between the edge of the circuit board and the inner wall of the rectangular groove. When the roller rolls to the step, the two sets of movable blocks are separated by the rebound force of the spring, which not only allows the circuit board to fall smoothly onto the conveyor belt, but also further reduces the waste of frosting.

[0010] Preferably, a turning mechanism is further provided below the frame, the turning mechanism comprising a blanking frame, the upper end of the blanking frame is fixedly connected to the frame, a limit cover is fixedly mounted on the blanking frame, a fan-shaped block is rotatably mounted at the lower end of the blanking frame, a plurality of groups of rollers are rotatably mounted in the blanking frame, a stopper for blocking the circuit board is provided on the fan-shaped block, and a conveyor belt is located below the lower end of the blanking frame;

[0011] The motor drives the sector block to rotate toward the conveyor belt, so that the sector block drives the circuit board to rotate. When the circuit board is turned over, it will automatically fall onto the conveyor belt, thereby realizing the turning of the circuit board and improving the processing efficiency of the next set of processes for the circuit board.

[0012] Example 3

[0013] A method for sandblasting a circuit board using immersion gold, the method comprising the following steps:

[0014] Step 1: Place the circuit board to be sandblasted onto a set of empty unloading components;

[0015] Step 2: The motor drives the transmission shaft to rotate, causing several groups of unloading assemblies to slowly move in a circular motion, and the unloading assemblies carrying the circuit boards are moved into the sandblasting mechanism, and the spray gun on the sandblasting mechanism is used to sandblast the slowly moving circuit boards;

[0016] Step 3: As several groups of unloading components slowly make circular motions, the staff continues to place the circuit boards to be sandblasted onto the next group of unloading components;

[0017] Step 4: Transfer the PCB after sandblasting in step 2 to the conveyor belt below, and then transfer the PCB to the next set of immersion gold process through the conveyor belt;

[0018] Step 5: Perform immersion gold treatment on the circuit board;

[0019] After sandblasting, the circuit board first falls into the turning mechanism, and then the turning mechanism turns the circuit board over, and the turned circuit board is conveyed to the conveyor belt.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. When the discharge assembly continuously passes through the sandblasting mechanism, a closed space is formed by multiple sets of discharge assemblies, two sets of side panels, a transparent cover, two sets of sealing edge strips, and a dust filter bag. The abrasive splashed in the closed space will only fall into the dust filter bag, greatly reducing the abrasive splashing to the outside world, which not only reduces the waste of abrasive, but also greatly reduces the pollution of abrasive to the external environment.

[0022] 2. The roller will be squeezed by the oblique surface, causing the roller to drive the movable column and the movable plate to move upward, and the movable column compresses the spring. As the movable plate moves upward, the two sets of pins will slide along the two sets of oblique grooves. Under the guidance of the oblique grooves, the two sets of pins drive the two sets of guide blocks to move toward each other along the guide grooves. The two sets of guide blocks merge the two sets of movable blocks, so that the edge of the circuit board is close to the inner wall of the rectangular groove, preventing fine frosting from entering between the edge of the circuit board and the inner wall of the rectangular groove. When the roller rolls to the step, the rebound force of the spring separates the two sets of movable blocks, which not only allows the circuit board to fall smoothly onto the conveyor belt, but also further reduces the waste of frosting.

[0023] 3. After sandblasting, the circuit board will fall into the unloading rack and slide obliquely downward along the rollers in the unloading rack, so that the circuit board passes through the limit cover until it is blocked by the block on the fan-shaped block. Then the motor drives the fan-shaped block to rotate toward the conveyor belt, so that the fan-shaped block drives the circuit board to rotate. When the circuit board is turned over, it will automatically fall onto the conveyor belt, thereby realizing the turning of the circuit board and improving the processing efficiency of the next set of processes for the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 It is a partial schematic diagram of the structure of the present invention.

[0026] Figure 2 It is a cross-sectional schematic diagram of the frame, transmission shaft, sprocket, chain, discharge assembly and sandblasting mechanism of the present invention.

[0027] Figure 3 It is a cross-sectional schematic diagram of the transparent cover, side panels, dust filter bag, sealing edge strips, and discharge assembly of the present invention.

[0028] Figure 4 It is a schematic diagram of the combination of the chain and the discharge component of the present invention.

[0029] Figure 5 It is a cross-sectional schematic diagram of the discharge assembly of the present invention.

[0030] Figure 6 It is a schematic diagram of the combination of the transmission shaft, guide plate and discharge assembly of the present invention.

[0031] Figure 7 It is a schematic diagram of the combination of the frame, unloading assembly, unloading mechanism and conveyor belt of the present invention.

[0032] Figure 8 It is a schematic diagram of the blanking mechanism of the present invention.

[0033] Figure 9 It is a schematic diagram of the overall structure of the present invention.

[0034] Figure: 1, frame; 2, drive shaft; 201, guide plate; 2011, inclined surface; 2012, step; 3, sprocket; 4, chain; 5, unloading assembly; 51, rectangular trough; 6, sandblasting mechanism; 7, turning mechanism; 8, conveyor belt; 601, transparent cover; 602, side panel; 6021, feed chute; 603, dust filter bag; 604, spray gun; 605, air pipe; 606, storage barrel ; 607, sand feeding mechanism; 608, sealing edge strip; 501, base; 5011, guide groove; 502, movable block; 503, guide block; 504, movable plate; 5041, oblique groove; 5042, pin shaft; 505, movable column; 5051, roller; 506, spring; 701, unloading rack; 702, roller; 703, limit cover; 704, fan-shaped block; 7041, stop block. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0036] Example 1

[0037] like Figures 1 to 9 As shown, a circuit board immersion gold sandblasting device according to an embodiment of the present invention includes a frame 1 and two sets of chains 4. Two sets of transmission shafts 2 rotate in the frame 1, and two sets of sprockets 3 are installed on the transmission shafts 2. Each set of chains 4 engages with two sets of sprockets 3. Several sets of discharge components 5 are arranged around the chains 4. A sandblasting mechanism 6 is arranged above the frame 1, and a conveyor belt 8 is arranged below the frame 1. The sandblasting mechanism 6 includes a transparent cover 601, and side plates 602 are fixed at both ends of the transparent cover 601. The lower ends of the side plates 602 are fixedly connected to the frame 1. A material chute 6021 is provided at the lower end for the discharge component 5 to pass through, a rectangular groove 51 is provided on the discharge component 5, dust filter bags 603 are provided on both sides of the lower end of the transparent cover 601, two groups of spray guns 604 are fixedly installed on the upper end of the transparent cover 601, the upper ends of the two groups of spray guns 604 are connected to the air pipe 605, the two groups of lower ports of the storage barrel 606 are respectively connected to two groups of sand feeding mechanisms 607, the sand feeding mechanisms 607 are connected to the spray guns 604, and two groups of sealing edge strips 608 for guiding the discharge component 5 are provided between the two groups of side panels 602.

[0038] Specifically, the thickness of the side plate 602 is greater than the gap between the discharge components 5, the end of the air pipe 605 is connected to the air pump, the storage barrel 606 is filled with frosted sand, and the sand feeding mechanism 607 adopts the patent with the above-mentioned announcement number CN217619992U, which discloses the unloading mechanism in the sandblasting machine for circuit board immersion gold. When the circuit board needs to be sandblasted, the circuit board is placed in the rectangular groove 51 on a set of discharge components 5, and then a set of motors drives a set of transmission shafts 2 to rotate, a set of transmission shafts 2 drives two sets of sprockets 3 to rotate, and the two sets of sprockets 3 drive two sets of chains 4 together with several sets of discharge components 5 to slowly make a circular motion. Figure 1 The direction indicated by the middle arrow is the direction of circular motion. At the same time, the discharge component 5 carrying the circuit board enters the interior of the structure composed of the side panel 602 and the transparent cover 601 through the material trough 6021 on one set of side panels 602, and the two sides of the discharge component 5 slide against the two sets of sealing edge strips 608 respectively. At this time, the frosting in the storage barrel 606 is transported into the spray gun 604 through the sand feeding mechanism 607, and then the air is transported into the spray gun 604 through the air pipe 605 by the air pump. The air entering the spray gun 604 sprays the frosting on the circuit board, and the sputtered frosting will fall into the dust filter bag 603 with the air flow, thereby realizing the sandblasting of the circuit board, until the discharge component 5 carrying the circuit board passes through the material trough on another set of side panels 602. The slot 6021 moves out of the sandblasting mechanism 6. During this process, the staff continues to place the circuit boards to be sandblasted onto the next set of discharge components 5. The sandblasted circuit boards will fall onto the conveyor belt 8 as the discharge components 5 move in a circle, and will be transported to the next process through the conveyor belt 8. The above operations are repeated in a cycle. Compared with the prior art, during the process of the discharge components 5 continuously passing through the sandblasting mechanism 6, a closed space is formed by multiple sets of discharge components 5, two sets of side panels 602, a transparent cover 601, two sets of sealing edge strips 608, and a dust-proof filter bag 603. The sand splashed in the closed space will only fall into the dust-proof filter bag 603, which greatly reduces the sand splashing to the outside world, not only reducing the waste of sand, but also greatly reducing the pollution of the sand to the external environment.

[0039] like Figures 4 to 6As shown, the discharge assembly 5 includes a base 501, the bottom of the base 501 is fixedly connected to two groups of chains 4, two groups of guide blocks 503 movably mounted on the base 501, a movable block 502 fixedly connected to the guide block 503, the two groups of movable blocks 502 are combined into a rectangular groove 51, the two groups of movable blocks 502 are both plugged into a movable plate 504, a movable column 505 fixedly connected to the lower end of the movable plate 504, a spring 506 sleeved on the movable column 505, a guide groove 5011 is opened on the base 501, and the two The guide blocks 503 are all slidably connected to the guide grooves 5011. Two groups of oblique grooves 5041 are provided on the movable plate 504. Pins 5042 are provided in the oblique grooves 5041. The pins 5042 are fixedly installed in the guide blocks 503. A guide plate 201 is provided between the two groups of transmission shafts 2. An oblique surface 2011 and a step 2012 are provided on the outer ring of the guide plate 201. A roller 5051 is rotatably installed at the lower end of the movable column 505. The roller 5051 is rollingly connected to the outer ring of the guide plate 201.

[0040] Specifically, if the size of the rectangular groove 51 is compact with the design of the circuit board, when the circuit board is sandblasted, fine frosting will enter between the edge of the circuit board and the inner wall of the rectangular groove 51, resulting in increased friction between the edge of the circuit board and the inner wall of the rectangular groove 51, causing the circuit board to be stuck in the rectangular groove 51 and unable to fall smoothly onto the conveyor belt 8. The rectangular groove 51 is designed to be large in size, and the rectangular groove 51 will bring out more frosting, resulting in waste of frosting. Therefore, in the initial state, the two sets of movable blocks 502 are in a separated state, so that it is convenient for the staff to put the circuit board into the rectangular groove 51. Then, during the circular motion of the discharge component 5, the roller 5051 on the discharge component 5 will roll along the outer ring of the guide plate 201, and the roller 5051 will be squeezed by the inclined surface 2011, causing the roller 5 051 drives the movable column 505 and the movable plate 504 to move upward, and the movable column 505 compresses the spring 506. As the movable plate 504 moves upward, the two groups of pins 5042 will slide along the two groups of oblique grooves 5041. Under the guidance of the oblique grooves 5041, the two groups of pins 5042 drive the two groups of guide blocks 503 to move toward each other along the guide grooves 5011. The two groups of guide blocks 503 merge the two groups of movable blocks 502, so that the edge of the circuit board is close to the inner wall of the rectangular groove 51, preventing fine frosting from entering between the edge of the circuit board and the inner wall of the rectangular groove 51. When the roller 5051 rolls to the step 2012, the two groups of movable blocks 502 are separated under the rebound force of the spring 506, which not only allows the circuit board to fall smoothly onto the conveyor belt 8, but also further reduces the waste of frosting.

[0041] Example 2

[0042] like Figure 7 and Figure 8As shown, compared with Example 1, another embodiment of the present invention is: a turning mechanism 7 is further provided under the frame 1, the turning mechanism 7 includes a discharge rack 701, the upper end of the discharge rack 701 is fixedly connected to the frame 1, a limit cover 703 is fixedly installed on the discharge rack 701, a fan-shaped block 704 is rotatably installed at the lower end of the discharge rack 701, and a plurality of groups of rollers 702 are rotatably installed in the discharge rack 701, and a block 7041 for blocking the circuit board is provided on the fan-shaped block 704, and the conveyor belt 8 is located below the lower end of the discharge rack 701.

[0043] Specifically, the sandblasted surface of the circuit board dropped onto the conveyor belt 8 is facing downward. Since the next process needs to process the sandblasted surface of the circuit board, the circuit board needs to be turned over, which affects the processing efficiency of the next set of processes for the circuit board. The sandblasted circuit board will fall into the unloading rack 701 and will slide obliquely downward along the roller 702 in the unloading rack 701, so that the circuit board passes through the limit cover 703 until it is blocked by the block 7041 on the fan block 704, and then the fan block 704 is driven by the motor to rotate toward the conveyor belt 8, so that the fan block 704 drives the circuit board to rotate. When the circuit board is turned over, it will automatically fall onto the conveyor belt 8, thereby realizing the turning over of the circuit board and improving the processing efficiency of the circuit board in the next set of processes.

[0044] Example 3

[0045] A method for immersion gold sandblasting of a circuit board, the method using the above-mentioned immersion gold sandblasting device for a circuit board, comprising the following steps:

[0046] Step 1: Place the circuit board to be sandblasted onto a set of empty discharge components 5;

[0047] Step 2: The motor drives the transmission shaft 2 to rotate, causing the plurality of discharge assemblies 5 to slowly perform circular motion, and the discharge assemblies 5 carrying the circuit boards are moved into the sandblasting mechanism 6, and the spray gun 604 on the sandblasting mechanism 6 sandblasts the slowly moving circuit boards;

[0048] Step 3: While several groups of discharge components 5 are slowly moving in a circular motion, the staff continues to place the circuit boards to be sandblasted onto the next group of discharge components 5;

[0049] Step 4: The circuit board after sandblasting in step 2 is transferred to the conveyor belt 8 below, and the conveyor belt 8 transfers the circuit board to the next set of gold deposition process;

[0050] Step 5: Perform immersion gold treatment on the circuit board.

[0051] Furthermore, the sandblasted circuit board first falls into the turning mechanism 7 , and then the turning mechanism 7 turns the circuit board over, and the turned circuit board is conveyed to the conveyor belt 8 .

[0052] Working principle: Place the circuit board in the rectangular slot 51 on a set of discharge components 5, then use a set of motors to drive a set of transmission shafts 2 to rotate, and a set of transmission shafts 2 drives two sets of sprockets 3 to rotate, and the two sets of sprockets 3 drive two sets of chains 4 together with several sets of discharge components 5 to slowly make circular motions. At the same time, the discharge components 5 carrying the circuit board pass through the material trough 6021 on a set of side panels 602 into the structure composed of the side panels 602 and the transparent cover 601, and the two sides of the discharge components 5 slide against the two sets of sealing edge strips 608 respectively. At this time, the frosted sand in the storage barrel 606 is transported into the spray gun 604 through the sand feeding mechanism 607. Then, the air is pumped into the spray gun 604 through the air pipe 605. The air entering the spray gun 604 sprays the frosted sand onto the circuit board, and the splashed frosted sand falls into the dust filter bag 603 along with the air flow, thus completing the sandblasting of the circuit board. The discharge assembly 5 carrying the circuit board is then moved out of the sandblasting mechanism 6 through the feed chute 6021 on the other set of side panels 602. During this process, the staff continues to place the circuit board to be sandblasted onto the next set of discharge assemblies 5. The sandblasted circuit board falls onto the conveyor belt 8 as the discharge assembly 5 moves in a circle, and is then conveyed to the next process via the conveyor belt 8. The above operation is repeated in a cycle.

[0053] In the initial state, the two sets of movable blocks 502 are in a separated state, which makes it easy for the staff to put the circuit board into the rectangular groove 51. Then, when the discharge component 5 makes a circular motion, the roller 5051 on the discharge component 5 will roll along the outer ring of the guide plate 201, and the roller 5051 will be squeezed by the inclined surface 2011, so that the roller 5051 drives the movable column 505 and the movable plate 504 to move upward, and the movable column 505 compresses the spring 506. As the movable plate 504 moves upward, the two sets of pins 5042 will move along the two sets of inclined surfaces. The two sets of movable blocks 502 slide toward the groove 5041. Guided by the oblique groove 5041, the two sets of pins 5042 drive the two sets of guide blocks 503 to move toward each other along the guide groove 5011. The two sets of guide blocks 503 merge the two sets of movable blocks 502, so that the edge of the circuit board is close to the inner wall of the rectangular groove 51, preventing fine frosting from entering between the edge of the circuit board and the inner wall of the rectangular groove 51. When the roller 5051 rolls to the step 2012, the rebound force of the spring 506 separates the two sets of movable blocks 502, allowing the circuit board to fall smoothly onto the conveyor belt 8.

[0054] After sandblasting, the circuit board will fall into the unloading rack 701 and will slide obliquely downward along the roller 702 in the unloading rack 701, so that the circuit board passes through the limit cover 703 until it is blocked by the block 7041 on the fan block 704. Then, the fan block 704 is driven by the motor to rotate toward the conveyor belt 8, so that the fan block 704 drives the circuit board to rotate. When the circuit board is turned over, it will automatically fall onto the conveyor belt 8.

[0055] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit board immersion gold sandblasting device, comprising a frame (1) and two sets of chains (4), characterized in that: Two sets of transmission shafts (2) are rotated in the frame (1), two sets of sprockets (3) are installed on the transmission shafts (2), each set of chains (4) engages with two sets of sprockets (3), and a plurality of sets of discharge components (5) are arranged around the chains (4). A sandblasting mechanism (6) is arranged above the frame (1), and a conveyor belt (8) is arranged below the frame (1); The sandblasting mechanism (6) includes a transparent cover (601), side panels (602) are fixed at both ends of the transparent cover (601), the lower ends of the side panels (602) are fixedly connected to the frame (1), and a material trough (6021) for the discharge assembly (5) to pass through is provided at the lower end of the side panels (602), and a rectangular groove (51) is provided on the discharge assembly (5); Dust-proof filter bags (603) are provided on both sides of the lower end of the transparent cover (601), and two sets of spray guns (604) are fixedly installed on the upper end of the transparent cover (601); An air pipe (605), the upper ends of the two groups of spray guns (604) are connected to the air pipe (605); A material storage barrel (606), wherein two groups of lower ports of the material storage barrel (606) are respectively connected to two groups of sand delivery mechanisms (607), and the sand delivery mechanisms (607) are connected to the spray gun (604). Two groups of sealing edge strips (608) for guiding the discharge assembly (5) are provided between the two groups of side plates (602); The discharge assembly (5) comprises: A base (501), wherein the bottom of the base (501) is fixedly connected to the two sets of chains (4); Two sets of guide blocks (503) movably mounted on the base (501); A movable block (502) fixedly connected to the guide block (503), wherein two groups of movable blocks (502) are combined to form the rectangular groove (51); The two groups of movable blocks (502) are both plugged into the movable plate (504); A movable column (505) fixedly connected to the lower end of the movable plate (504); a spring (506) sleeved on the movable column (505); A guide groove (5011) is provided on the base (501), and the two groups of guide blocks (503) are slidably connected to the guide groove (5011); Two groups of oblique grooves (5041) are provided on the movable plate (504), pins (5042) are provided in the oblique grooves (5041), and the pins (5042) are fixedly installed in the guide block (503); A guide plate (201) is provided between the two groups of transmission shafts (2), and an outer ring of the guide plate (201) is provided with an inclined surface (2011) and a step (2012).

2. The circuit board immersion gold sandblasting device according to claim 1, characterized in that: A roller (5051) is rotatably mounted on the lower end of the movable column (505), and the roller (5051) is rollingly connected to the outer ring of the guide plate (201).

3. The circuit board immersion gold sandblasting device according to claim 2, characterized in that: A material turning mechanism (7) is further provided below the machine frame (1), and the material turning mechanism (7) comprises a material unloading frame (701), and the upper end of the material unloading frame (701) is fixedly connected to the machine frame (1); A limiting cover (703) fixedly mounted on the unloading rack (701); A fan-shaped block (704) is rotatably mounted at the lower end of the unloading rack (701), and a plurality of groups of rollers (702) are rotatably mounted inside the unloading rack (701).

4. The circuit board immersion gold sandblasting device according to claim 3, characterized in that: A stopper (7041) for blocking a circuit board is provided on the fan-shaped block (704), and the conveyor belt (8) is located below the lower end of the unloading rack (701).

5. A method for immersion gold blasting of a circuit board based on the immersion gold blasting device according to any one of claims 1 to 4, characterized in that: The method comprises the following steps: Step 1: placing the circuit board to be sandblasted onto a set of empty discharge components (5); Step 2: The motor drives the transmission shaft (2) to rotate, causing the plurality of discharge assemblies (5) to slowly perform circular motion, and the discharge assemblies (5) carrying the circuit boards are moved into the sandblasting mechanism (6), and the spray gun (604) on the sandblasting mechanism (6) is used to sandblast the slowly moving circuit boards; Step 3: While the plurality of discharge components (5) are performing circular motion, the staff continues to place the circuit boards to be sandblasted onto the next set of discharge components (5); Step 4: The circuit board after sandblasting in step 2 is transferred to the conveyor belt (8) below, and the circuit board is transferred to the next set of gold deposition process via the conveyor belt (8); Step 5: Perform immersion gold treatment on the circuit board.

6. The immersion gold sandblasting method according to claim 5, characterized in that: The circuit board after sandblasting in step 4 falls into the turning mechanism (7), the turning mechanism (7) turns the circuit board over, and the turned circuit board is conveyed to the conveyor belt (8).

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