Device for preventing crystallization at end of guide roll for surface treatment of copper foil

Abstract

The utility model relates to copper foil technical field, especially a kind of device for preventing crystallization of guide roller end in copper foil surface treatment, including press roll, guide roller and water jet pipe;The press roll and guide roller are arranged in the upper and lower sides of copper foil, and the press roll is arranged above the copper foil, the guide roller is arranged below the copper foil, the press roll and guide roller are combined to extrude the copper foil on the guide roller;The water jet pipe is arranged on the side surface of the two ends of the press roll and the guide roller.The device for preventing crystallization of guide roller end provided by the utility model can effectively avoid the formation of crystallization at the end of guide roller during copper foil surface treatment, and further effectively avoid the appearance abnormal problems such as copper foil pressure pit, surface scratch and even hole caused by crystallization falling.

Description

Technical Field

[0001] This utility model relates to the field of copper foil technology, and in particular to a device for preventing crystallization at the end of a guide roller in copper foil surface treatment. Background Technology

[0002] Copper foil is a primary material for manufacturing printed circuit boards, with electrolytic copper foil and rolled copper foil being the most common. Typically, copper foil is pressed against a resin substrate under specific temperature and pressure conditions. To ensure sufficient bonding strength between the copper foil and the insulating substrate, while also guaranteeing excellent heat resistance, oxidation resistance, and etching characteristics, a series of surface treatments are required for the copper foil.

[0003] Copper foil surface treatment is a continuous process completed on a surface treatment production line. The typical copper foil surface treatment process is as follows: pickling – roughening – curing – heat-resistant barrier layer treatment – ​​anti-oxidation treatment – ​​organic treatment – ​​drying. Because different treatment steps use different solutions, to reduce waste and prevent cross-contamination, pressure rollers and guide rollers are usually installed at the exit of the electroplating tank. These rollers work together to squeeze the copper foil, forcing the solution carried out of the copper foil surface back into the electroplating tank. Simultaneously, a water washing tank is installed after the electroplating tank to clean the electroplating solution from the copper foil surface.

[0004] Both the roughening and curing solutions primarily consist of copper sulfate and sulfuric acid, but at different concentrations. The roughening solution is low in copper and high in acid, while the curing solution is high in copper and low in acid. The sulfuric acid-copper sulfate system is highly prone to forming copper sulfate crystals during use, a well-known problem among technicians in the copper foil industry.

[0005] During the surface treatment process, the pressure roller and guide roller work together to squeeze the copper foil on the guide roller. After being squeezed, most of the electroplating solution carried out from the copper foil surface flows back into the electroplating tank, while a small portion diffuses laterally along the pressure roller and guide roller, especially at the edges of the copper foil, until it reaches the very edge of the pressure roller and guide roller, where it flows downwards under gravity. The electroplating solution on the end face continues to diffuse laterally along the rotation axis after flowing to the rotation axis. Because the flow of the electroplating solution at the end face and rotation axis is very slow, the electroplating solution at this location gradually loses water and precipitates copper sulfate crystals, which accumulate over time. Because the pressure roller is positioned above the guide roller, the electroplating solution on the end face mainly flows downwards towards the guide roller, and most of the crystals form on the end face of the guide roller and the rotation axis of the guide roller, with a small portion forming on the end face of the pressure roller. When the crystals accumulate to a certain amount, they will detach and fall into the electroplating tank. If the crystals fall to the position of the submerged roller, they will be squeezed by the copper foil driven on the submerged roller, causing dents, scratches or even holes on the surface of the copper foil, resulting in the copper foil being scrapped.

[0006] Therefore, it is necessary to develop a device for preventing crystallization at the ends of guide rollers in copper foil surface treatment to solve the above problems. Utility Model Content

[0007] In order to solve the above-mentioned technical problems in the prior art, the present invention provides a device for preventing crystallization at the end of a guide roller for copper foil surface treatment.

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0009] This utility model provides a device for preventing crystallization at the end of a guide roller in copper foil surface treatment, comprising a pressure roller, a guide roller, and a water spray pipe; the pressure roller and the guide roller are disposed on the upper and lower sides of the copper foil, with the pressure roller disposed above the copper foil and the guide roller disposed below the copper foil, the pressure roller and the guide roller working together to press the copper foil on the guide roller; the water spray pipe is disposed on the sides of both ends of the pressure roller and the guide roller.

[0010] The beneficial effects of adopting the above technical solution are as follows: the mechanical extrusion structure formed by the upper and lower pressure rollers and guide rollers effectively removes residual electroplating solution from the surface of copper foil, and the side-mounted water spray pipe can directly act on the end of the roller body, specifically solving the end face crystallization problem.

[0011] Based on the above technical solution, in order to achieve ease of use and stability of the equipment, the present invention can further improve the above technical solution as follows:

[0012] Furthermore, the outlet of the water spray pipe is aligned with the end faces of the pressure roller and the guide roller.

[0013] The beneficial effect of adopting the above-mentioned further technical solutions is that it controls the direction of the jet and ensures that the water flow directly impacts the area prone to crystallization.

[0014] Furthermore, the pressure roller is provided with a first rubber ring at both ends, and the guide roller is provided with a second rubber ring at both ends.

[0015] The beneficial effect of adopting the above-mentioned further technical solution is that the rubber ring physically blocks the radial diffusion path of the electroplating solution.

[0016] Furthermore, the pressure roller has a first rotation center shaft at both ends, and the guide roller has a second rotation center shaft at both ends. The first rubber ring is sleeved on the outer circumference of the first rotation center shaft, and the second rubber ring is sleeved on the outer circumference of the second rotation center shaft.

[0017] Furthermore, the first rubber ring has a gap with the end face of the pressure roller on the same side; the second rubber ring has a gap with the end face of the guide roller on the same side.

[0018] Furthermore, the distance between the first rubber ring and the end face of the pressure roller is 2-15cm, and the distance between the second rubber ring and the end face of the guide roller is also 2-15cm.

[0019] Furthermore, the device for preventing crystallization at the end of the guide roller for copper foil surface treatment also includes two drainage grooves, which are located below both ends of the guide roller to receive washing liquid from the end face of the pressure roller, the first rubber ring, the end face of the guide roller, and the second rubber ring.

[0020] Furthermore, the length of the drainage groove is greater than the horizontal distance between the end face of the pressure roller and the first rubber ring, and greater than the horizontal distance between the end face of the guide roller and the second rubber ring; the width of the drainage groove is greater than the diameter of the guide roller, the pressure roller, the first rubber ring, and the second rubber ring.

[0021] Furthermore, the diameter of the pressure roller is smaller than the diameter of the guide roller.

[0022] The beneficial effects of this utility model are:

[0023] (1) The water spray pipe sprays water onto the end faces of the pressure roller and guide roller to clean the electroplating solution on the end faces, effectively preventing copper sulfate crystals from precipitating on the end faces. The water washing solution on the end faces flows to the rotating central shaft, simultaneously cleaning the rotating central shaft, effectively preventing copper sulfate crystals from precipitating on the rotating central shaft;

[0024] (2) The first and second rubber rings can control most of the washing liquid that diffuses along the rotation center axis within the distance between the rubber ring and the end face, so that the diffused washing liquid drips down along the rubber ring.

[0025] (3) The washing liquid dripping along the end face of the pressure roller, the end face of the guide roller, and the first and second rubber rings falls into the drainage grooves below both ends of the guide roller and is discharged, reducing the flow of water into the electroplating tank and thus reducing the impact on the concentration of the treatment solution in the electroplating tank.

[0026] (4) This utility model can effectively avoid the precipitation of crystals, thereby avoiding the quality abnormality problems of dents, scratches or even holes on the copper foil surface caused by crystal shedding. Attached Figure Description

[0027] Figure 1 This is a front view of the device for preventing crystallization at the end of the guide roller in copper foil surface treatment according to this utility model;

[0028] Figure 2 This is a side view of the device for preventing crystallization at the end of the guide roller in copper foil surface treatment according to the present invention.

[0029] Figure label:

[0030] 1. Pressure roller; 2. Guide roller; 3. Water spray pipe; 4. First rubber ring; 5. Second rubber ring; 6. Drainage groove; 7. Copper foil; 8. First rotating center shaft; 9. Second rotating center shaft. Detailed Implementation

[0031] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0032] like Figures 1 to 2 As shown, this utility model discloses a device for preventing crystallization at the end of a guide roller in copper foil surface treatment, which includes a pressure roller 1, a guide roller 2, and a water spray pipe 3; the pressure roller 1 and the guide roller 2 are disposed on the upper and lower sides of the copper foil 7, with the pressure roller 1 disposed above the copper foil 7 and the guide roller 2 disposed below the copper foil 7, and the pressure roller 1 and the guide roller 2 press the copper foil 7 on the guide roller 2 together; the water spray pipe 3 is disposed on the sides of both ends of the pressure roller 1 and the guide roller 2.

[0033] In a preferred embodiment, the outlet of the water spray pipe 3 is aligned with the end faces of the pressure roller 1 and the guide roller 2. Figure 2 The direction of the middle arrow indicates the transmission direction of the copper foil. The water spray pipe 3 sprays water onto the end faces of the pressure roller 1 and guide roller 2 to clean the electroplating solution on the end faces, effectively preventing copper sulfate crystals from precipitating on the end faces. The water washing solution on the end faces flows to the rotating central shaft, simultaneously cleaning the rotating central shaft and effectively preventing copper sulfate crystals from precipitating on the rotating central shaft.

[0034] In a preferred embodiment, the pressure roller 1 is provided with a first rubber ring 4 at both ends, and the guide roller 2 is provided with a second rubber ring 5 at both ends.

[0035] In an optional embodiment, the pressure roller 1 is provided with a first rotation center shaft 8 at both ends, the guide roller 2 is provided with a second rotation center shaft 9 at both ends, the first rubber ring 4 is sleeved on the outer periphery of the first rotation center shaft 8, and the second rubber ring 5 is sleeved on the outer periphery of the second rotation center shaft 9.

[0036] The first rubber ring 4 has a gap of 2-15cm between it and the end face of the pressure roller 1 on the same side; the second rubber ring 5 has a gap of 2-15cm between it and the end face of the guide roller 2 on the same side.

[0037] In this embodiment, the device for preventing crystallization at the end of the guide roller 2 for surface treatment of copper foil 7 further includes two drainage grooves 6, which are located below both ends of the guide roller 2 to receive washing liquid from the end face of the pressure roller 1, the first rubber ring 4, the end face of the guide roller 2 and the second rubber ring 5.

[0038] In this embodiment, the length of the drainage groove 6 is greater than the horizontal distance between the end face of the pressure roller 1 and the first rubber ring 4, and greater than the horizontal distance between the end face of the guide roller 2 and the second rubber ring 5. The width of the drainage groove 6 is greater than the diameter of the guide roller 2, the pressure roller 1, the first rubber ring 4, and the second rubber ring 5.

[0039] In this embodiment, the diameter of the pressure roller 1 is smaller than the diameter of the guide roller 2.

[0040] The washing liquid dripping along the end face of the pressure roller 1, the end face of the guide roller 2, and the first rubber ring 4 and the second rubber ring 5 falls into the drainage groove 6 below both ends of the guide roller 2 and is discharged, which can reduce the flow of water into the electroplating tank and thus reduce the impact on the concentration of the treatment solution in the electroplating tank.

[0041] The first rubber ring 4 can control most of the washing liquid that diffuses along the rotation center axis of the pressure roller 1 within the distance range between the first rubber ring 4 and the end face of the pressure roller 1, so that the diffused washing liquid drips down along the first rubber ring 4; the second rubber ring 5 can control most of the washing liquid that diffuses along the rotation center axis of the guide roller 2 within the distance range between the second rubber ring 5 and the end face of the guide roller 2, so that the diffused washing liquid drips down along the second rubber ring 5.

[0042] This embodiment can effectively avoid the precipitation of crystals at the end of the guide roller during the copper foil surface treatment process, thereby avoiding quality abnormalities such as pits, scratches, or even holes on the copper foil surface caused by crystal shedding.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for preventing crystallization at the end of a guide roller in copper foil surface treatment, characterized in that, It includes a pressure roller (1), a guide roller (2), and a water spray pipe (3); the pressure roller (1) and the guide roller (2) are disposed on the upper and lower sides of the copper foil (7), with the pressure roller (1) disposed above the copper foil (7) and the guide roller (2) disposed below the copper foil (7). The pressure roller (1) and the guide roller (2) work together to squeeze the copper foil (7) on the guide roller (2); the water spray pipe (3) is disposed on the sides of both ends of the pressure roller (1) and the guide roller (2).

2. The device for preventing crystallization at the end of the guide roller for copper foil surface treatment according to claim 1, characterized in that, The outlet of the water spray pipe (3) is aligned with the end faces of the pressure roller (1) and the guide roller (2).

3. The device for preventing crystallization at the end of a guide roller for copper foil surface treatment according to claim 1, characterized in that, The pressure roller (1) is provided with a first rubber ring (4) at both ends, and the guide roller (2) is provided with a second rubber ring (5) at both ends.

4. The device for preventing crystallization at the end of the guide roller for copper foil surface treatment according to claim 3, characterized in that, The pressure roller (1) has a first rotation center shaft (8) at both ends, and the guide roller (2) has a second rotation center shaft (9) at both ends. The first rubber ring (4) is sleeved on the outer circumference of the first rotation center shaft (8), and the second rubber ring (5) is sleeved on the outer circumference of the second rotation center shaft (9).

5. The device for preventing crystallization at the end of the guide roller for copper foil surface treatment according to claim 4, characterized in that, The first rubber ring (4) has a gap with the end face of the pressure roller (1); the second rubber ring (5) has a gap with the end face of the guide roller (2).

6. The apparatus for preventing crystallization at the end of a guide roller for copper foil surface treatment according to claim 5, characterized in that, The distance between the first rubber ring (4) and the end face of the pressure roller (1) is 2-15cm, and the distance between the second rubber ring (5) and the end face of the guide roller (2) is also 2-15cm.

7. The device for preventing crystallization at the end of a guide roller for copper foil surface treatment according to claim 1, characterized in that, It also includes two drainage channels (6), which are located below the two ends of the guide roller (2).

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