Preimpregnation box for copper deposition of circuit board

Abstract

The utility model discloses a preimpregnation box for copper deposition of a circuit board, which comprises a box body, a cleaning plate is arranged in the box body in a sliding manner, cleaning tanks are arranged on four side edges of the cleaning plate, a plurality of nozzles are arranged in the cleaning tanks at equal intervals, the cleaning plate is of a hollow structure, the nozzles are communicated with the inside of the cleaning plate, and the cleaning plate is of a hollow structure. The cleaning device comprises a box body, a cleaning plate is arranged in the box body, a floating plate is arranged at the bottom of the cleaning plate, a round hole is formed in the floating plate, and a locking ring and a locking assembly are arranged in the round hole. Therefore, copper hydroxide attached to the inner wall of the box body is flushed through water flow ejected from the nozzles on the side edge of the cleaning plate, an operator does not need to hold a water pipe by hand to flush the inner wall of the presoaking box, the cleaning operation of the presoaking box is simplified, and cleaning is more convenient.

Description

Technical Field

[0001] The utility model relates to a prepreg box used for copper deposition of a circuit board. Background Art

[0002] Pre-preg is an important step in the copper plating process of circuit boards. It removes slight oxides on the surface of circuit boards by immersing the circuit boards in a weakly acidic solution, so that copper ions can be retained in the pre-preg solution as much as possible to avoid contamination of subsequent activation by copper ions. During the pre-preg process, the copper ion concentration of the pre-preg solution in the pre-preg tank will gradually increase. When the copper ion concentration is high, the pre-preg solution needs to be replaced and the pre-preg tank needs to be cleaned with an alkaline solution to remove the residual copper ions in the tank. However, when many existing pre-preg tanks are cleaned with an alkaline solution, the residual copper ions react with the alkaline solution to produce copper hydroxide precipitates that will partially adhere to the inner wall of the pre-preg tank, requiring the operator to use a handheld water pipe to rinse the inner wall of the pre-preg tank, which makes the cleaning of the pre-preg tank inconvenient. Therefore, it is necessary to develop a pre-preg tank for copper plating of circuit boards to solve the above problems. Utility Model Content

[0003] The utility model aims to provide a prepreg box for copper deposition of circuit boards to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] A prepreg box for copper deposition of circuit boards comprises a box body, a cleaning plate is slidably arranged in the box body, cleaning grooves are arranged on the four sides of the cleaning plate, a plurality of nozzles are arranged at equal intervals in the cleaning grooves, the cleaning plate is a hollow structure, the nozzles are connected with the interior of the cleaning plate, a floating plate is arranged at the bottom of the cleaning plate, a circular hole is arranged on the floating plate, a locking ring and a locking assembly are arranged in the circular hole, the locking ring is fixed to the bottom of the cleaning plate, the locking assembly is arranged at the bottom of the box body, and a discharge pipe is arranged at the bottom of the side wall of the box body.

[0006] Preferably, the locking assembly includes a locking cylinder, which is arranged on the inner side of the locking ring, a support column is connected between the locking cylinder and the bottom wall in the box body, an electromagnet is fixed in the locking cylinder, locking rods are slidably arranged on both sides of the electromagnet, a spring is connected between the locking rod and the electromagnet, a locking hole corresponding to the locking rod is provided on the inner wall of the locking ring, and the locking rod is plugged into the locking hole.

[0007] Preferably, the locking rod is made of epoxy resin, and an iron block is provided on the end of the locking rod close to the electromagnet.

[0008] Preferably, two water inlets are provided on the top of the cleaning plate, the water inlets are connected to the interior of the cleaning plate, a water hose 1 is provided on the two water inlets, a three-way joint is connected between the two water hoses 1, and a water hose 2 is provided on the three-way joint.

[0009] Preferably, the floating plate is made of pearl cotton, and a gap is left between the floating plate and the inner wall of the box body.

[0010] The beneficial effect of the utility model is that during the cleaning process of replacing the prepreg liquid for the prepreg box, the cleaning plate can move from top to bottom as the cleaning liquid in the box is discharged, so that the copper hydroxide attached to the inner wall of the box is washed by the water flow ejected from the nozzle on the side of the cleaning plate, and the operator does not need to hold the water pipe to wash the inner wall of the prepreg box, so that the cleaning operation of the prepreg box is simplified and the cleaning is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below, but this does not limit the protection scope of the utility model.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 For this utility model Figure 1 The structural diagram of the cleaning plate;

[0014] Figure 3 For this utility model Figure 1 The enlarged schematic diagram at A in the middle;

[0015] Figure 4 For this utility model Figure 1 The enlarged schematic diagram of point B in the middle;

[0016] Figure 5 For this utility model Figure 4 A schematic diagram of the structure of the locking ring;

[0017] Figure 6 For this utility model Figure 4 Schematic diagram of the structure of the locking component.

[0018] In the figure: 11, box body; 12, cleaning plate; 13, floating plate; 14, water hose 1; 15, three-way connector; 16, water hose 2; 17, cleaning tank; 18, nozzle; 19, water inlet; 20, discharge pipe; 21, locking ring; 22, locking assembly; 23, locking hole; 24, locking cylinder; 25, support column; 26, electromagnet; 27, locking rod. DETAILED DESCRIPTION

[0019] See also Figures 1 to 6 A prepreg box for copper deposition of circuit boards shown in the figure comprises a box body 11, a cleaning plate 12 is slidably arranged in the box body 11, cleaning grooves 17 are arranged on the four sides of the cleaning plate 12, a plurality of nozzles 18 are arranged at equal intervals in the cleaning grooves 17, the cleaning plate 12 is a hollow structure, the nozzles 18 are connected with the inside of the cleaning plate 12, a floating plate 13 is arranged at the bottom of the cleaning plate 12, a circular hole is arranged on the floating plate 13, a locking ring 21 and a locking assembly 22 are arranged in the circular hole, the locking ring 21 is fixed to the bottom of the cleaning plate 12, the locking assembly 22 is arranged at the bottom of the box body 11, and a discharge pipe 20 is arranged at the bottom of the side wall of the box body 11; a solenoid valve is arranged in the discharge pipe 20, and the liquid in the box body 11 can be discharged from the discharge pipe 20 by opening the solenoid valve; the locking ring 21 is fixed to the bottom of the cleaning plate 12, and the locking assembly 22 is arranged at the bottom of the box body 11; the bottom of the side wall of the box body 11 is provided with a discharge pipe 20 ... The component 22 locks the cleaning plate 12 at the bottom of the box body 11. When the locking component 22 releases the lock on the box body 11, the cleaning plate 12 can use the floating plate 13 to float in the solution contained in the box body 11. As the liquid in the box body 11 is discharged, the cleaning plate 12 gradually moves downward. During the movement, water is injected into the cleaning plate 12, and water is sprayed from each nozzle 18, thereby flushing the copper hydroxide precipitates attached to the inner wall of the box body 11, and making these copper hydroxide precipitates flow along the inner wall of the box body 11 to the bottom of the box body 11, and finally discharged from the discharge pipe 20. During the cleaning process, for the copper hydroxide precipitates attached to the inner wall of the box body 11, there is no need for the operator to hold the water pipe to flush the inner wall of the prepreg box, so that the cleaning operation of the prepreg box is simplified and the cleaning is more convenient.

[0020] Furthermore, the locking assembly 22 includes a locking cylinder 24, which is arranged on the inner side of the locking ring 21, and a support column 25 is connected between the locking cylinder 24 and the bottom wall in the box body 11, and an electromagnet 26 is fixed in the locking cylinder 24, and locking rods 27 are slidably arranged on both sides of the electromagnet 26, and a spring is connected between the locking rod 27 and the electromagnet 26, and a locking hole 23 corresponding to the locking rod 27 is provided on the inner wall of the locking ring 21, and the locking rod 27 is plugged into the locking hole 23; the locking rod 27 is inserted into the locking hole 23 under the action of the spring, so that the locking ring 21 is locked with the locking assembly 22, and then the cleaning plate 12 is locked at the bottom of the box body 11, and when cleaning is not needed, the cleaning plate 12 is stably located at the bottom of the box body 11, so as to prevent the cleaning plate 12 from affecting the circuit board from extending into the box body 11 for pre-impregnation.

[0021] Furthermore, the locking rod 27 is epoxy resin, and an iron block is provided on the end of the locking rod 27 near the electromagnet 26; the epoxy resin locking rod 27 has strong acid and alkali resistance, and can resist the corrosion of the pre-impregnation liquid or the cleaning liquid in the box body 11. When the electromagnet 26 is started, the electromagnet 26 absorbs the iron block at the end of the locking rod 27 through magnetic force, so that the locking rod 27 moves into the locking cylinder 24, thereby separating the locking rod 27 from the locking hole 23, thereby releasing the lock of the locking assembly 22 on the cleaning plate 12.

[0022] Furthermore, two water injection ports 19 are provided on the top of the cleaning plate 12, and the water injection ports 19 are connected to the interior of the cleaning plate 12. A water hose 14 is provided on the two water injection ports 19, and a three-way joint 15 is connected between the two water hoses 14. A water hose 2 16 is provided on the three-way joint 15; the water hose 2 16 is externally connected to a water pump and a water source. When the water pump is started, water can be injected into the cleaning plate 12, so that water is ejected from each nozzle 18 to wash the inner wall of the box body 11.

[0023] Furthermore, the float plate 13 is pearl cotton, and a gap is left between the float plate 13 and the inner wall of the box body 11; the float plate 13 of pearl cotton has good acid and alkali resistance and is not easy to corrode, and can provide sufficient buoyancy for the cleaning plate 12; a gap is left between the float plate 13 and the box body 11 to prevent the float plate 13 from hindering the copper hydroxide precipitate from being discharged from the discharge pipe 20.

[0024] The working principle of the utility model is that when the copper ion concentration of the pre-soak in the box 11 is too high and the pre-soak needs to be replaced, the solenoid valve in the discharge pipe 20 is first opened to drain the pre-soak in the box 11, and then the solenoid valve is closed and a weakly alkaline cleaning solution is injected into the box 11, so that the residual copper ions in the box 11 are converted into copper hydroxide precipitates. After a period of time, the solenoid valve is opened to discharge the cleaning solution and most of the copper hydroxide precipitates in the box 11 from the discharge pipe 20.

[0025] After the initial cleaning is completed, the solenoid valve is closed, and weak alkaline cleaning liquid is injected into the box body 11 again, and the electromagnet 26 is started. The electromagnet 26 attracts the iron block at the end of the locking rod 27 through magnetic force, so that the locking rod 27 moves into the locking cylinder 24, so that the locking rod 27 is separated from the locking hole 23, thereby releasing the lock of the locking assembly 22 on the cleaning plate 12. The cleaning plate 12 floats on the top of the cleaning liquid under the buoyancy of the floating plate 13, and the water delivery hose 16 is connected to an external water pump and a water source. Water is injected into the cleaning plate 12 by the water pump, so that water flows out from each nozzle 18 to wash the inner wall of the box body 11, and the solenoid valve in the discharge pipe 20 is opened. , so that the cleaning liquid in the box 11 is gradually discharged, and the cleaning plate 12 gradually moves downward with the discharge of the cleaning liquid, thereby flushing the inner wall of the box 11 from top to bottom, and the copper hydroxide precipitate attached to the inner wall of the box 11 is flushed down and discharged from the discharge pipe 20. When the cleaning liquid in the box 11 is drained, clean water is injected into the box 11, and the above process is repeated to clean the residual cleaning liquid in the box 11, and then the electromagnet 26 is turned off, and the locking rod 27 is inserted into the locking hole 23 again under the action of the spring, and the cleaning plate 12 is locked at the bottom of the box 11, thereby completing the cleaning, and then new infiltration liquid is injected into the box 11.

[0026] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A prepreg box for copper deposition on circuit boards, characterized in that: It includes a box body, in which a cleaning plate is slidably arranged, four sides of the cleaning plate are provided with cleaning grooves, a plurality of nozzles are arranged at equal intervals in the cleaning grooves, the cleaning plate is a hollow structure, the nozzles are connected with the interior of the cleaning plate, a floating plate is arranged at the bottom of the cleaning plate, a circular hole is arranged on the floating plate, a locking ring and a locking assembly are arranged in the circular hole, the locking ring is fixed to the bottom of the cleaning plate, the locking assembly is arranged at the bottom of the box body, and a discharge pipe is arranged at the bottom of the side wall of the box body.

2. A prepreg tank for copper deposition of circuit boards according to claim 1, characterized in that: The locking assembly includes a locking cylinder, which is arranged on the inner side of a locking ring. A support column is connected between the locking cylinder and the bottom wall in the box body. An electromagnet is fixed in the locking cylinder. Locking rods are slidably arranged on both sides of the electromagnet. A spring is connected between the locking rod and the electromagnet. A locking hole corresponding to the locking rod is provided on the inner wall of the locking ring, and the locking rod is plugged into the locking hole.

3. A prepreg tank for copper deposition of circuit boards according to claim 2, characterized in that: The locking rod is made of epoxy resin, and an iron block is arranged at the end of the locking rod close to the electromagnet.

4. A prepreg tank for copper deposition of circuit boards according to claim 1, characterized in that: The top of the cleaning plate is provided with two water inlets, which are communicated with the interior of the cleaning plate, and the two water inlets are provided with a water hose 1, a three-way joint is connected between the two water hoses 1, and a water hose 2 is provided on the three-way joint.

5. The prepreg box for copper deposition of circuit boards according to claim 1, characterized in that: The floating plate is made of pearl cotton, and a gap is left between the floating plate and the inner wall of the box body.

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