Defoaming device for circuit board processing

Abstract

The utility model discloses a defoaming device for circuit board processing, which belongs to the field of circuit board processing and comprises a developing box, a reciprocating screw rod and a sucker are adjacently arranged at the top of the developing box, a defoaming plate is movably connected to the outer wall of the reciprocating screw rod, a plurality of defoaming thorns are fixedly arranged on the outer wall of the defoaming plate, and the sucker is communicated and connected with a vacuum pump through a conveying pipe. A filter screen is arranged in the conveying pipe, an electric spray head is arranged at the top of the side, away from the suction cup, of the filter screen, the electric spray head is communicated and connected with the solvent box, and an exhaust pipe and a liquid conveying pipe are further arranged at the top end and the bottom end of the conveying pipe correspondingly; and a liquid level meter and a liquid medicine concentration detector are respectively arranged in the developing box and the temporary storage box. The whole operation process can be automatically operated under the control of a control panel, multiple means are used for defoaming, the defoaming effect is good, and it can be guaranteed that the concentration of developing liquid flowing back into the developing box is consistent.

Description

Technical Field

[0001] The utility model relates to the field of circuit board processing, in particular to a defoaming device for circuit board processing. Background Art

[0002] Circuit boards, also known as printed circuit boards (PCBs), support electronic components and serve as the bridge connecting circuits. The design and manufacture of circuit boards is a critical step in electronic product development, and their quality directly impacts the performance and reliability of the entire device. Circuit boards can be categorized into various types based on their structure, including single-sided, double-sided, and multi-layer boards. Each type has its own specific application scenarios and manufacturing processes.

[0003] Defoaming devices for PCB processing are primarily used to address foaming issues that arise during PCB production. Foam generation can negatively impact PCB quality and production efficiency, so effective defoaming measures are crucial.

[0004] After the circuit is exposed, the image transfer is completed by development. During the development process, sodium carbonate solution is used to develop the dry film in the non-circuit area. Sodium carbonate circulates back and forth through the equipment, which will produce a large amount of foam, resulting in unclean board surface development. In order to reduce the generation of foam, defoaming agents are currently widely used in the industry to eliminate foam. However, adding defoaming agents directly into the developing box will affect the concentration of the developer and make it impossible to keep it consistent, and may cause circuit gap problems. In addition, most of the current defoaming methods add defoaming agents to the defoaming box through pipes at regular intervals. However, since the defoaming agent is only added from one corner, the defoaming agent does not come into sufficient contact with the foam, which often leads to incomplete foam elimination. Without filtering the foam and defoaming by multiple means, the defoaming effect is average. Utility Model Content

[0005] In order to solve the above-mentioned problem that directly adding defoaming agent into the developing box will affect the concentration of the developing solution, making it impossible to keep it consistent and possibly causing circuit gaps, and the current defoaming method mostly adds defoaming agent to the defoaming box through a pipe at regular intervals, but because the defoaming agent is only added from one corner, the defoaming agent and the foam are not in sufficient contact, which often leads to incomplete elimination of the foam, and the technical problem that the foam is not filtered and defoamed by multiple means, the utility model provides a defoaming device for circuit board processing.

[0006] A defoaming device for circuit board processing includes a developing box, a reciprocating screw and a suction cup are adjacently arranged on the top of the developing box, a defoaming plate is movably connected to the outer wall of the reciprocating screw, a plurality of defoaming thorns are fixedly arranged on the outer wall of the defoaming plate, the suction cup is connected to a vacuum pump through a conveying pipe, a filter is provided inside the conveying pipe, an electric nozzle is provided on the top of the side of the filter away from the suction cup, the electric nozzle is connected to the solvent box, an exhaust pipe, an infusion pipe and a waste residue bucket are respectively provided at the top and bottom of the conveying pipe, the infusion pipe is connected to the temporary storage box, and a liquid level meter and a chemical concentration detector are respectively provided inside the developing box and the temporary storage box.

[0007] More preferably, an opening is provided at the top of the developing box, a vertical plate is fixedly provided on the top wall next to the opening, two L-shaped plates, a control panel, an observation window and a servo motor are provided on the outer wall of the developing box, and a slide groove is fixedly provided on the opposite inner wall of the developing box.

[0008] More preferably, one end of the reciprocating screw is rotatably set on the side wall of the vertical plate, and the other end passes through the side wall of the developing box and is set at the output end of the servo motor. The defoaming plate includes a movable seat threadedly connected to the outer wall of the reciprocating screw, and a U-shaped push plate is fixedly set at the bottom end of the movable seat. A number of fine water filtering holes are set through the side wall of the U-shaped push plate, and a number of defoaming thorns are fixed on the outer wall of the U-shaped push plate. The two ends of the U-shaped push plate can move back and forth in the slide groove.

[0009] More preferably, the suction cup is arranged through the top wall of the developing box, the liquid level meter is arranged below the suction cup mouth of the suction cup and above the lowest end of the U-shaped push plate, which can sense the liquid level of the foam, and the chemical concentration detector is fixedly arranged inside the temporary storage box, which can detect the concentration of the internal developing solution.

[0010] More preferably, the filter screen is detachably arranged inside the conveying pipe, and the waste residue bucket is arranged on the side of the filter screen close to the suction cup to collect the waste residue filtered out by the filter screen, and a movable cover is provided at the bottom end of the waste residue bucket.

[0011] More preferably, the solvent box is fixedly arranged on the top wall of the delivery pipe and is provided with a feed pipe, into which defoaming agent can be added. The electric nozzle is arranged through the top wall of the delivery pipe, and electromagnetic valves are provided inside the exhaust pipe and the infusion pipe.

[0012] More preferably, the infusion pipe is arranged through the L-shaped plate located above, the temporary storage box is fixedly arranged on the top wall of the L-shaped plate located below, a feed pipe is also arranged through the outer wall of the temporary storage box, and a return pipe is arranged through the bottom wall of the temporary storage box, and the bottom end of the return pipe is connected to the bottom of the developing box.

[0013] More preferably, the control panel is electrically connected to the vacuum pump, the electric spray head, the liquid level meter, the liquid medicine concentration detector, the servo motor and the solenoid valve.

[0014] Compared with the prior art, the beneficial effect of the present invention is that after sensing the foam through the liquid level meter or seeing the amount of foam through the observation window, the defoaming plate is first used to defoam the foam and push it to the bottom of the suction cup. After starting the vacuum pump, the suction cup is used to adsorb the foam onto the conveying pipe, and the foam is first filtered through the filter and then sprayed with defoaming agent through the electric nozzle. The defoamed liquid flows into the temporary storage box, and an appropriate amount of defoaming agent is added to the temporary storage box according to the detection result of the medicine concentration detector to ensure that the concentration is consistent with the concentration inside the developing box. The entire operation process can be automated under the control of the control panel, and multiple means are used for defoaming, which not only has a good defoaming effect, but also can ensure that the concentration of the developer flowing back into the developing box is consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic top view of the structure of the utility model;

[0017] Figure 3 This is a schematic diagram of part structure A of the utility model;

[0018] Figure 4 This is a schematic diagram of part structure B of the utility model.

[0019] In the figure: 1. developing box; 2. reciprocating screw; 3. suction cup; 4. defoaming plate; 5. defoaming barb; 6. conveying pipe; 7. vacuum pump; 8. filter screen; 9. electric nozzle; 10. solvent tank; 11. exhaust pipe; 12. infusion pipe; 13. waste residue hopper; 14. temporary storage box; 15. liquid level gauge; 16. chemical solution concentration detector; 17. vertical plate; 18. L-shaped plate; 19. control panel; 20. observation window; 21. servo motor; 22. slide; 23. moving seat; 24. U-shaped push plate; 25. fine water filter hole; 26. solenoid valve; 27. feed pipe; 28. return pipe. DETAILED DESCRIPTION

[0020] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0021] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate for the embodiments of the present invention described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatuses.

[0022] In this utility model, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe the utility model and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0023] Furthermore, some of the above terms may be used to express other meanings besides orientation or positional relationships. For example, the term "on" may also be used in certain circumstances to indicate a dependency or connection. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances. Furthermore, the term "plurality" should mean two or more.

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. Figures 1-4 The present invention is described in detail with reference to the embodiments.

[0025] A defoaming device for circuit board processing includes a developing box 1. A reciprocating screw 2 and a suction cup 3 are adjacently disposed on the top of the developing box 1. Rotating the reciprocating screw 2 can move a defoaming plate 4 to the side of the suction cup 3, pushing the foam beneath the suction cup 3 for easier absorption by the suction cup 3. The top of the developing box 1 has an opening through which both the circuit board and the developer can be placed. A vertical plate 17 is fixedly disposed on the top wall adjacent to the opening. One end of the reciprocating screw 2 is rotatably mounted on the side wall of the vertical plate 17, while the other end extends through the side wall of the developing box 1 and is mounted on the output terminal of a servo motor 21. Activating the servo motor 21 rotates the reciprocating screw 2, which in turn drives the defoaming plate 4 to move left and right.

[0026] The outer wall of the reciprocating screw 2 is movably connected with a defoaming plate 4, and a number of defoaming thorns 5 are fixedly provided on the outer wall of the defoaming plate 4. The defoaming plate 4 includes a movable seat 23 threadedly connected to the outer wall of the reciprocating screw 2, and a U-shaped push plate 24 is fixedly provided at the bottom end of the movable seat 23. A number of fine water filtering holes 25 are provided through the side wall of the U-shaped push plate 24, and a number of defoaming thorns 5 are fixedly provided on the outer wall of the U-shaped push plate 24. A slide groove 22 is fixedly provided on the opposite inner wall of the developing box 1, and the two ends of the U-shaped push plate 24 can move back and forth in the slide groove 22.

[0027] The movable seat 23 moves to the right, driving the U-shaped push plate 24 to move to the right, and the developer is filtered out from the fine water filter holes 25. The foam is pushed by the U-shaped push plate 24 to approach the bottom of the suction cup 3. The slide groove 22 can ensure the stability of the U-shaped push plate 24 when it moves. The foam is pushed to the bottom of the suction cup 3, which is convenient for the adsorption of the suction cup 3. The defoaming thorns 5 can also defoam the foam at the same time when the U-shaped push plate 24 moves, and can puncture the foam.

[0028] The suction cup 3 is set through the top wall of the developing box 1. The suction cup 3 is connected to the vacuum pump 7 through the conveying pipe 6. A liquid level gauge 15 is set inside the developing box 1. The liquid level gauge 15 is set below the suction cup mouth of the suction cup 3 and above the lowest end of the U-shaped push plate 24. It can sense the liquid level of the foam. The liquid level gauge 15 is a foam liquid level sensor commonly used in the prior art. It can transmit the sensed foam liquid level to the control system inside the control panel 19. After the control panel 19 receives the message, it will initiate a start command to the servo motor 21 if it matches the preset value, and repeat the above steps to facilitate the suction cup 3 to absorb the foam.

[0029] A filter screen 8 is provided inside the conveying pipe 6, and the filter screen 8 is detachably provided inside the conveying pipe 6. A waste residue bucket 13 is provided at the bottom end of the conveying pipe 6. The waste residue bucket 13 is provided on the side of the filter screen 8 close to the suction cup 3, and can collect the waste residue filtered out by the filter screen 8. A movable cover is provided at the bottom end of the waste residue bucket 13.

[0030] Start the vacuum pump 7 to drive the suction cup 3 to generate adsorption force, and the foam enters the conveying pipe 6 from the suction cup 3. The impurities in the foam are filtered out by the filter 8, and the filtered impurities fall into the waste slag hopper 13 below. The movable cover can be opened regularly to clean the waste slag, and the foam filtered out by the impurities enters the other side of the filter 8.

[0031] An electric nozzle 9 is provided on the top of the side of the filter screen 8 away from the suction cup 3. The electric nozzle 9 is connected to the solvent tank 10. The solvent tank 10 is fixedly set on the top wall of the conveying pipe 6 and is provided with a feed pipe 27. Defoaming agent can be added to the inside of the solvent tank 10. The electric nozzle 9 is set through the top wall of the conveying pipe 6. When the electric nozzle 9 is started, the defoaming agent inside the solvent tank 10 is sprayed onto the foam below.

[0032] An exhaust pipe 11 and a liquid infusion pipe 12 are respectively provided at the top and bottom ends of the delivery pipe 6. Solenoid valves 26 are provided inside the exhaust pipe 11 and the liquid infusion pipe 12. Two L-shaped plates 18, a control panel 19, an observation window 20 and a servo motor 21 are provided on the outer wall of the developing box 1. The amount of foam and the liquid level inside the developing box 1 can be observed through the observation window 20. The solenoid valve 26 inside the liquid infusion pipe 12 is opened, and the developer liquid that has eliminated the foam and returned to liquid state flows into the temporary storage box 14 along the liquid infusion pipe 12.

[0033] The infusion tube 12 is connected to the temporary storage box 14. A chemical concentration detector 16 is provided inside the temporary storage box 14. The chemical concentration detector 16 is fixedly arranged inside the temporary storage box 14. The chemical concentration detector 16 is a technology in the prior art and has the same function as the developer solution addition concentration monitoring device in CN216144751 U, and can detect the concentration of the internal developer solution.

[0034] The infusion pipe 12 is set through the L-shaped plate 18 located above, and the temporary storage box 14 is fixedly set on the top wall of the L-shaped plate 18 located below. A feed pipe 27 is also set through the outer wall of the temporary storage box 14, and a return pipe 28 is set through the bottom wall of the temporary storage box 14. The bottom end of the return pipe 28 is connected to the bottom of the developing box 1.

[0035] Based on the developer concentration detected by the developer concentration detector 16, an appropriate amount of developer is added to the temporary storage tank 14 through the feed pipe 27 to make the concentration consistent with that inside the developing tank 1, thereby preventing dilution from affecting the developing effect. The developer is then transported to the developing tank 1 through the return pipe 28 for reuse, thus avoiding waste. By opening the solenoid valve 26 inside the exhaust pipe 11, the gas can be discharged from the exhaust pipe 11 to the outside air.

[0036] The control panel 19 is electrically connected to the vacuum pump 7, the electric nozzle 9, the liquid level meter 15, the chemical concentration detector 16, the servo motor 21 and the solenoid valve 26. The operation procedures and preset values of all components can be preset inside the control panel 19 to achieve the purpose of automatic defoaming and improve the work efficiency of circuit board production.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A defoaming device for circuit board processing, comprising a developing box (1), characterized in that: A reciprocating screw (2) and a suction cup (3) are adjacently arranged on the top of the developing box (1); a defoaming plate (4) is movably connected to the outer wall of the reciprocating screw (2); a plurality of defoaming thorns (5) are fixedly arranged on the outer wall of the defoaming plate (4); the suction cup (3) is connected to a vacuum pump (7) through a delivery pipe (6); a filter screen (8) is arranged inside the delivery pipe (6); an electric nozzle (9) is arranged on the top of the side of the filter screen (8) away from the suction cup (3); the electric nozzle (9) is connected to a solvent box (10); an exhaust pipe (11), a liquid delivery pipe (12), and a waste residue bucket (13) are respectively arranged at the top and bottom ends of the delivery pipe (6); the liquid delivery pipe (12) is connected to a temporary storage box (14); a liquid level meter (15) and a liquid concentration detector (16) are respectively arranged inside the developing box (1) and the temporary storage box (14).

2. A defoaming device for circuit board processing according to claim 1, characterized in that: The top of the developing box (1) is provided with an opening, and a vertical plate (17) is fixedly provided on the top wall next to the opening. The outer wall of the developing box (1) is provided with two L-shaped plates (18), a control panel (19), an observation window (20) and a servo motor (21), and the inner wall opposite to the developing box (1) is fixedly provided with a slide groove (22).

3. A defoaming device for circuit board processing according to claim 2, characterized in that: One end of the reciprocating screw (2) is rotatably arranged on the side wall of the vertical plate (17), and the other end penetrates the side wall of the developing box (1) and is arranged on the output end of the servo motor (21). The defoaming plate (4) includes a movable seat (23) threadedly connected to the outer wall of the reciprocating screw (2). A U-shaped push plate (24) is fixedly arranged at the bottom end of the movable seat (23). A plurality of fine water filtering holes (25) are arranged through the side wall of the U-shaped push plate (24). A plurality of defoaming thorns (5) are fixedly arranged on the outer wall of the U-shaped push plate (24). Both ends of the U-shaped push plate (24) can reciprocate in the slide groove (22).

4. A defoaming device for circuit board processing according to claim 3, characterized in that: The suction cup (3) is arranged through the top wall of the developing box (1), the liquid level meter (15) is arranged below the suction cup opening of the suction cup (3) and above the lowest end of the U-shaped push plate (24), and can sense the liquid level of the foam; the liquid concentration detector (16) is fixedly arranged inside the temporary storage box (14), and can detect the concentration of the internal developer liquid.

5. The defoaming device for circuit board processing according to claim 3, characterized in that: The filter screen (8) is detachably arranged inside the delivery pipe (6); the waste residue bucket (13) is arranged on a side of the filter screen (8) close to the suction cup (3) and can collect the waste residue filtered out by the filter screen (8); and a movable cover is arranged at the bottom end of the waste residue bucket (13).

6. A defoaming device for circuit board processing according to claim 5, characterized in that: The solvent box (10) is fixedly arranged on the top wall of the delivery pipe (6) and is provided with a feed pipe (27) for adding defoaming agent. The electric nozzle (9) is arranged through the top wall of the delivery pipe (6). The exhaust pipe (11) and the infusion pipe (12) are both provided with electromagnetic valves (26).

7. A defoaming device for circuit board processing according to claim 6, characterized in that: The liquid delivery pipe (12) is arranged through the upper L-shaped plate (18), the temporary storage box (14) is fixedly arranged on the top wall of the L-shaped plate (18) located below, a feed pipe (27) is also arranged through the outer wall of the temporary storage box (14), and a return pipe (28) is arranged through the bottom wall of the temporary storage box (14), and the bottom end of the return pipe (28) is connected to the bottom of the developing box (1).

8. A defoaming device for circuit board processing according to claim 4 or 6, characterized in that: The control panel (19) is electrically connected to the vacuum pump (7), the electric spray head (9), the liquid level meter (15), the liquid medicine concentration detector (16), the servo motor (21) and the electromagnetic valve (26).

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