A device for prolonging the life of a copper flat

Abstract

This utility model relates to the field of circuit board electroplating technology, and provides a device for extending the life of copper flat plates. The device includes a flybar fixture, which comprises a square tube beam and a copper flat plate, and further includes a protective cover and a spray assembly. The protective cover is fixedly connected to the square tube beam and is located above the square tube beam, extending along the length of the square tube beam and covering the copper flat plate. The spray assembly includes a water washing tank, a water spray pipe, and spray nozzles; the spray nozzles are aimed at the protective cover. Beneficial effects: Residual acid from the circuit board drips downwards onto the protective cover, preventing the acid from dripping onto the square tube beam and then flowing down its edges onto the copper flat plate. The flybar fixture is then placed in the water washing tank of the water washing process, and the spray assembly sprays water onto the protective cover, removing the acid from the cover. This not only effectively prevents the copper flat plate from being corroded by acid and extends its lifespan, but also helps clean the protective cover.

Description

Technical Field

[0001] This utility model relates to the field of circuit board electroplating technology, and specifically to a device for extending the life of copper flat plates. Background Technology

[0002] The electroplating process for printed circuit boards (PCBs) mainly involves placing the PCB, after pattern transfer, into an electroplating bath, plating a sufficiently thick layer of copper onto the surface, and then plating tin as a resist. The main electroplating process flow is as follows: board loading → degreasing → water rinsing → micro-etching → water rinsing → copper bath pre-immersion → copper plating → water rinsing → tin bath pre-immersion → tin plating → water rinsing → board unloading.

[0003] like Figure 1 As shown, the Flybar fixture 1 is a device used on the electroplating equipment to clamp the circuit board. The Flybar fixture 1 includes a square tube beam 11 and a copper flat plate 12. The copper flat plate 12 is fixedly connected to the square tube beam 11 and is located below the square tube beam 11. The copper flat plate is a custom-made brass component used on the electroplating equipment to conduct electroplating current. Clips 13 are evenly distributed on the copper flat plate 12. The clips 13 are used to clamp the circuit board 14 and facilitate rapid loading and unloading. When the Flybar fixture is placed in the electroplating tank for copper plating, the circuit board is immersed in the electroplating solution for copper plating. The anodic current of the electroplating tank is conducted to the copper flat plate through the circuit board and the clips. Then, the copper triangular heads at both ends of the copper flat plate are connected to the copper V-seat. The current is then returned to the cathode of the rectifier through the power supply wire for cyclic high-frequency DC electroplating. After the process equipment automatically completes the precise control of the unit time and unit current, copper ions are evenly adsorbed on the circuit board.

[0004] The overhead crane transports the fly bar fixtures and places them sequentially into the electroplating tanks. Because the electroplating equipment operates automatically, many fly bar fixtures are constantly being rotated during production, and the overhead crane automatically handles the alternating loading and unloading of these fixtures. Figures 1 to 3 As shown, in the copper plating process, for example, two flybar fixtures (first flybar fixture 16 and second flybar fixture 17) are placed alternately in the electroplating tank for copper plating. When the trolley moves the first flybar fixture 16, which is located at the front, to the next water washing process, the residual electroplating solution on the circuit board 14 clamped by the first flybar fixture 16 will drip onto the square tube beams 11 of the other flybar fixtures it passes through. The electroplating solution for copper plating is acidic. The acid dripping onto the square tube beams of the other flybar fixtures flows down along the edges of the square tube beams and drips onto the copper flat plate below, causing the copper flat plate to be severely corroded by the acid. This affects the current uniformity of the copper flat plate and accelerates the breakage and scrapping of the copper flat plate, reducing the service life of the copper flat plate.

[0005] Therefore, how to set up a protective cover in the Flybar tooling to shield the acid from dripping onto the copper flat plate, and how to remove the acid located on the protective cover, is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a device for extending the life of copper flat plates. A protective cover is set in the flybar tooling to shield the copper flat plate from acid dripping and to remove the acid located on the protective cover.

[0007] The technical solution adopted in this utility model is: a device for extending the life of copper flat plates, comprising:

[0008] The flybar fixture includes a square tube beam and a copper flat plate, the copper flat plate being fixedly connected to the square tube beam and located below the square tube beam, and further includes:

[0009] Protective cover and spray assembly;

[0010] The protective cover is fixedly connected to the square tube beam, and the protective cover is located above the square tube beam. The protective cover is arranged along the length of the square tube beam and covers the copper flat plate.

[0011] The spray assembly includes a water washing tank, a water spray pipe, and spray nozzles. The water spray pipe is fixedly installed on the top of the water washing tank. The pipe wall is provided with a water outlet. The spray nozzles are installed in the water outlet. Multiple spray nozzles are arranged at intervals along the length of the water pipe. When the fly bar fixture is placed in the water washing tank, the spray nozzles are aligned with the protective cover.

[0012] Furthermore, the protective cover is V-shaped.

[0013] Furthermore, the square tube beam and the copper flat plate are connected by a clamping assembly, the protective cover is provided with a clearance groove, and the upper end of the clamping assembly is located in the clearance groove.

[0014] Furthermore, the spray assembly also includes a water pump and a suction pipe. The inlet of the suction pipe is connected to the bottom outlet of the washing tank, the outlet of the suction pipe is connected to the inlet of the water pump, and the outlet of the water pump is connected to the inlet of the spray pipe.

[0015] Furthermore, the spray assembly also includes a timer, which is electrically connected to the starting circuit of the water pump.

[0016] Compared with the prior art, the beneficial effects or advantages of this utility model are as follows:

[0017] A protective cover for shielding against acid is placed above the square tube beam of the flybar fixture. Acid residue from the circuit boards of other moving flybar fixtures drips down onto the protective cover, preventing the acid from dripping onto the square tube beam and then flowing down its edges onto the copper flat plate. The flybar fixture is then placed in the water washing tank of the water washing process, and the spray unit sprays water onto the protective cover to remove the acid located on the cover. This not only effectively prevents the copper flat plate from being corroded by acid and extends its service life, but also helps to clean the protective cover. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the Flybar tooling in the background technology.

[0020] Figure 2 This is a schematic diagram of the first and second flybar fixtures located in the electroplating tank in the background art.

[0021] Figure 3 This is a schematic diagram showing residual acid from the circuit board of the first flying tool in the background art dripping onto the square tube beam of the second flying tool.

[0022] Figure 4 This is a schematic diagram of the device for extending the lifespan of copper flat plates according to this utility model.

[0023] Figure 5 This is a schematic diagram of acid droplets falling onto the protective cover in this utility model.

[0024] Figure 6 This is a schematic diagram of the connection between the protective cover and the square tube beam in this utility model.

[0025] Figure 7 This is a three-dimensional structural diagram of the protective cover in this utility model.

[0026] Figure 8 This is a schematic diagram showing the upper end of the clip assembly in this utility model located in the avoidance groove.

[0027] Figure 9 This is a schematic diagram showing the connection between the water spray pipe, water pump, water suction pipe, and water washing tank in this utility model.

[0028] Reference numerals: Flybar fixture 1; Square tube beam 11; Copper flat plate 12; Clip 13; Circuit board 14; Clip assembly 15; First clip 151; Second clip 152; First flybar fixture 16; Second flybar fixture 17; Protective cover 2; Clearance groove 21; Spray assembly 3; Water washing tank 31; Spray pipe 32; Spray nozzle 33; Water pump 34; Suction pipe 35; Acid solution 4; Electroplating tank 5. Detailed Implementation

[0029] This utility model provides a device for extending the lifespan of copper flat plates. The overall technical concept is as follows:

[0030] The flybar fixtures are equipped with protective covers located above the square tube beams, shielding both the beams and the copper flats. In the copper plating process of the circuit board electroplating, multiple flybar fixtures clamp the circuit board and place it in the electroplating tank. After copper plating, the flybar fixtures at the front are moved to the next water washing process. During this movement, residual acid on the circuit board drips onto the protective cover of the flybar fixture below, preventing acid from dripping onto the square tube beams and flowing down the edges to the copper flats. This effectively prevents corrosion of the copper flats and extends their lifespan. The acid dripping from the protective cover returns to the electroplating tank. When the flybars are moved to the water washing tank after the tin tank according to the automatic rotation process, the spray assembly in the water washing tank sprays water onto the protective cover, rinsing away the acid and preventing the formation of copper sulfate deposits, thus aiding in the cleaning of the protective cover.

[0031] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0032] See Figures 1 to 9 The preferred embodiment of this utility model.

[0033] A device for extending the lifespan of copper flat plates, comprising:

[0034] The flying bar fixture 1 includes a square tube beam 11 and a copper flat plate 12. The copper flat plate 12 is fixedly connected to the square tube beam 11 and is located below the square tube beam 11. It also includes:

[0035] Protective cover 2 and spray assembly 3;

[0036] The protective cover 2 is fixedly connected to the square tube beam 11, and the protective cover 2 is located above the square tube beam 11. The protective cover 2 is arranged along the length direction of the square tube beam 11 and covers the copper flat 12.

[0037] The spray assembly 3 includes a washing tank 31, a spray pipe 32, and spray nozzles 33. The spray pipe 32 is fixedly installed on the top of the washing tank 31. The pipe wall of the spray pipe 32 is provided with a water outlet hole. The spray nozzles 33 are installed in the water outlet hole. Multiple spray nozzles 33 are arranged at intervals along the length of the spray pipe 32. When the fly bar fixture 1 is placed in the washing tank 31, the spray nozzles 33 are aligned with the protective cover 2.

[0038] The beneficial effects or advantages of this utility model are as follows: The protective cover 2 for shielding the acid liquid 4 is set above the square tube beam 11 of the flybar fixture 1. The acid liquid 4 remaining on the circuit board 14 of the other moving flybar fixture 1 drips down onto the protective cover 2, which avoids the acid liquid 4 dripping onto the square tube beam 11 and then flowing down along the edges of the square tube beam 11 and dripping onto the copper flat plate 12. Then, after the flybar fixture 1 is placed in the tin bath, the water washing tank 31 of the water washing process sprays water onto the protective cover 2 to remove the acid liquid 4 located on the protective cover 2. This not only effectively prevents the copper flat plate 12 from being corroded by the acid liquid 4 and extends the service life of the copper flat plate 12, but also helps to clean the protective cover 2.

[0039] Based on the structure of the Flybar fixture 1, a set of protective covers 2 is customized and installed above the square tube beam 11. The square tube beam 11 is a hollow beam with a square cross section. The protective cover 2 not only covers the square tube beam 11 and the copper flat plate 12, but also covers the clip 13 set on the copper flat plate 12 and the circuit board 14 clamped by the clip 13.

[0040] Electroplating tank, also known as electroplating bath; the main components of the electroplating solution used for copper plating include copper sulfate and sulfuric acid. It adopts a high acid and low copper formula to ensure the uniformity of the thickness distribution on the plate surface during electroplating and the ability to plate deep holes and small holes. The sulfuric acid content is mostly 180 g / L, and some reach 240 g / L. The copper sulfate content is generally around 75 g / L. In addition, a trace amount of chloride ions is added to the bath solution as an auxiliary gloss agent.

[0041] In this embodiment, the spray assembly 3 can be installed in the water washing tank 31 only in the final water washing process of the electroplating process, that is, the water washing process after tin plating, to uniformly rinse the various solutions remaining on the protective cover 2.

[0042] Furthermore, the protective cover 2 is V-shaped.

[0043] The beneficial effects of this technical solution are: the V-shaped protective cover 2 is to add shielding fins on the front and back sides of the square tube beam 11 to shield the acid liquid 4 dripping from the moving circuit board 14. The acid liquid 4 drips directly onto the electroplating tank 5 along the fins of the protective cover 2.

[0044] Furthermore, the square tube beam 11 and the copper flat plate 12 are connected by a clamping assembly 15, and the protective cover 2 is provided with a clearance groove 21, with the upper end of the clamping assembly 15 located in the clearance groove 21.

[0045] The beneficial effects of this technical solution are: the avoidance groove 21 of the protective cover 2 avoids contact with the clamping plate assembly 15, preventing interference with the connection stability of the clamping plate assembly 15. The clamping plate assembly 15 includes a first clamping plate 151 and a second clamping plate 152. The first clamping plate 151 and the second clamping plate 152 clamp the square tube beam 11 from both sides. The upper ends of the first clamping plate 151 and the upper ends of the second clamping plate 152 are locked together by a first bolt (not shown) and a first nut (not shown). The lower ends of the first clamping plate 151, the copper flat plate 12, and the lower ends of the second clamping plate 152 are locked together by a second bolt (not shown) and a second nut (not shown).

[0046] Furthermore, the spray assembly 3 also includes a water pump 34 and a suction pipe 35. The inlet of the suction pipe 35 is connected to the bottom outlet of the washing tank 31, the outlet of the suction pipe 35 is connected to the inlet of the water pump 34, and the outlet of the water pump 34 is connected to the inlet of the spray pipe 32.

[0047] The beneficial effects of this technical solution are: the water pump 34 draws water from the water washing tank 31 to the water spray pipe 32, and the water sprayed from the spray nozzle 33 of the water spray pipe 32 cleans the protective cover 2. The water then flows down along the protective cover 2 into the water washing tank 31 for cyclic cleaning.

[0048] Furthermore, the spray assembly 3 also includes a timer (not shown), which is electrically connected to the starting circuit of the water pump 34. The timer is based on the PLC controller with added interlocking and timing instructions. The PLC controller's I / O interface outputs electrical signals to control the starting circuit of the water pump, thereby realizing and completing automatic spraying.

[0049] The beneficial effects of this technical solution are as follows: When the Flybar fixture 1 is placed in the water washing tank 31, the water pump 34 is started and the spray nozzle 33 sprays water to rinse the protective cover 2. After the set time has elapsed, the timer sends a signal to the starting circuit device of the water pump 34, and the starting circuit device cuts off the power to the water pump 34, thereby automatically stopping the spraying operation. The starting circuit device is existing technology.

[0050] The device for extending the life of copper flat plates of this utility model is to install a protective cover 2 on the existing fly bar tool 1, which can specifically solve the corrosion problem of most of the dripping acid liquid 4 on the copper flat plate 12, effectively extending the life of the copper flat plate 12. In addition, a spray component 3 is installed in the water washing tank 31 to effectively remove the acid liquid 4 on the protective cover 2, which helps to clean the protective cover 2 and also increases the service life of the protective cover 2.

[0051] For example, in the copper plating process of the circuit board 14 electroplating process, three flybar fixtures clamp the circuit board 14 and place it in the electroplating tank 5 for copper plating. After the copper plating is completed, the square tube beam of the first flybar fixture 16 is lifted. During the process of the first flybar fixture 16 moving above the second flybar fixture 17 to the water washing process, the residual acid 4 of the circuit board clamped by the first flybar fixture 16 drips onto the protective cover 2 of the second flybar fixture 17. The acid 4 adheres to the protective cover 2, preventing the dripping acid 4 from corroding the copper flat 12 of the second flybar fixture 17. Then the second flybar fixture 17 is moved to the water washing tank 31 of the water washing process. The spray assembly 3 located in the water washing tank 31 sprays water onto the protective cover 2 through the spray nozzle 33 to rinse the acid 4 adhering to the protective cover 2.

[0052] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A device for extending the lifespan of copper flat plates, comprising: A flybar fixture, comprising a square tube beam and a copper flat plate, wherein the copper flat plate is fixedly connected to the square tube beam and is located below the square tube beam, characterized in that it further comprises: Protective cover and spray assembly; The protective cover is fixedly connected to the square tube beam, and the protective cover is located above the square tube beam. The protective cover is arranged along the length of the square tube beam and covers the copper flat plate. The spray assembly includes a water washing tank, a water spray pipe, and spray nozzles. The water spray pipe is fixedly installed on the top of the water washing tank. The pipe wall is provided with a water outlet. The spray nozzles are installed in the water outlet. Multiple spray nozzles are arranged at intervals along the length of the water pipe. When the fly bar fixture is placed in the water washing tank, the spray nozzles are aligned with the protective cover.

2. The device for extending the lifespan of copper flat plates according to claim 1, characterized in that, The protective cover is V-shaped.

3. The device for extending the lifespan of copper flat plates according to claim 2, characterized in that, The square tube beam and the copper flat plate are connected by a clamping assembly. The protective cover is provided with a clearance groove, and the upper end of the clamping assembly is located in the clearance groove.

4. The device for extending the lifespan of copper flat plates according to claim 1, characterized in that, The spray assembly also includes a water pump and a suction pipe. The inlet of the suction pipe is connected to the outlet at the bottom of the washing tank, the outlet of the suction pipe is connected to the inlet of the water pump, and the outlet of the water pump is connected to the inlet of the spray pipe.

5. The device for extending the lifespan of copper flat plates according to claim 4, characterized in that, The spray assembly also includes a timer, which is electrically connected to the starting circuit of the water pump.

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