Fixed-point spraying device and etching liquid spraying system

Abstract

The utility model provides a fixed-point spraying device. An air pipe joint is connected with a pneumatic component to receive an air source; the air valve adjusts airflow to form controllable air pressure; the piston push rod is driven by air pressure to abut against the rubber plug. The rubber plug is mounted in the cavity and used for plugging the liquid inlet and outlet joint; the cavity comprises an etching liquid inlet and an etching liquid outlet which are communicated with each other; during air supply, air pressure pushes the piston push rod to abut against the rubber plug, and a liquid path is blocked; and after gas is cut off, the piston is released, the etching liquid hydraulically jacks the rubber plug to realize liquid path conduction, and directional spraying is carried out through the nozzle. The utility model also provides an etching liquid spraying system. Therefore, the etching liquid can be controlled to be uniformly sprayed, the etching liquid medicine can be accurately sprayed, the etching liquid medicine is ensured to be sprayed to a specified position, and the cost of the liquid medicine is saved; and spraying parameters can be automatically adjusted, the spraying precision and flexibility are improved, and the production efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of circuit board manufacturing, and in particular to a fixed-point spraying device and an etching solution spraying system. Background Technology

[0002] Uneven copper thickness can lead to uneven etching, where thinner sections may be etched through prematurely, while thicker sections may not reach the required depth, resulting in inconsistent copper thickness across the entire component. Therefore, in the manufacturing of printed circuit boards (PCBs) and IC substrates, the etching process must ensure uniform copper layer thickness. Etching line compensation systems can improve etching uniformity. Given the vast differences in copper thickness across PCB dimensions, conventional compensation systems using manual nozzle blocking are insufficient to meet diverse requirements. Especially with advancements in technology and increasingly precise PCB circuit designs, automatic compensation spraying based on copper thickness differences on each board is necessary to meet these high demands.

[0003] Traditional etching systems employ a fixed spray pattern, which cannot effectively compensate for differences in copper thickness: thinner areas are prone to over-etching, while thicker areas are under-etched, resulting in inconsistent finished product quality. While existing technologies offer compensation methods by manually blocking nozzles, these are cumbersome, lack flexibility, and are ill-suited to the demands of high-precision, diverse production. Especially with increasingly sophisticated circuit designs, there is an urgent need for a device that can automatically adjust spray parameters and precisely control the distribution of the etching solution. Utility Model Content

[0004] To address the aforementioned shortcomings, the present invention aims to provide a fixed-point spraying device and an etching solution spraying system that can control the uniform spraying of etching solution, precisely spray the etching solution, ensure that the etching solution is sprayed to the designated location, and save on the cost of the solution; it can also automatically adjust the spraying parameters to improve the accuracy and flexibility of the spraying, thereby improving production efficiency.

[0005] To achieve the above objectives, on the one hand, this utility model provides a fixed-point spraying device, comprising:

[0006] An air hose connector, one end of which is connected to a pneumatic component to receive gas delivered by the pneumatic component;

[0007] An air valve, connected to the other end of the air pipe connector, is used to adjust the gas flow rate output by the air pipe connector to form air pressure;

[0008] A piston push rod is installed at the output end of the air valve to press the rubber plug against the air pressure generated by the air valve.

[0009] The rubber stopper is installed inside a cavity to block the connection between the liquid inlet and outlet pipes of the cavity under the pressing action of the piston rod.

[0010] The cavity has a liquid inlet pipe and a liquid outlet pipe inside, and the connection between the liquid inlet pipe and the liquid outlet pipe is provided with the rubber plug; the inlet of the liquid inlet pipe is used to receive the etching solution, and the outlet of the liquid outlet pipe is used to install a nozzle.

[0011] When the pneumatic component stops supplying gas to the air pipe joint, the piston rod releases its pressing action on the rubber plug. Under the hydraulic pressure of the etching liquid supplied by the liquid inlet pipe, the rubber plug releases its blockage at the connection between the liquid inlet and outlet pipes of the cavity, so that the liquid inlet pipe and the liquid outlet pipe are connected.

[0012] Optionally, the output end of the air valve is provided with a groove, and the bottom of the inner groove is connected to the airflow pipe of the air valve. The piston push rod is located in the groove and the outer end face of the piston push rod is in contact with the rubber plug.

[0013] Optionally, the inlet of the liquid inlet pipe is located at the top of the cavity, and the outlet of the liquid outlet pipe is located at the bottom of the cavity. Both the liquid inlet pipe and the liquid outlet pipe have an L-shaped structure, and the connection between the liquid inlet pipe and the liquid outlet pipe is located at the side end opening of the cavity. The side end opening is connected to the air valve assembly, and the piston push rod and the rubber plug are located at the connection between the air valve and the side end opening.

[0014] Optionally, the air valve is fixed to the side opening of the cavity by a screw cap.

[0015] Optionally, the outlet of the liquid outlet pipe is screwed to a nozzle base, and the nozzle is mounted on the nozzle base.

[0016] Optionally, the piston push rod is provided with at least one sealing ring, which is used to seal the gas at the bottom of the groove from leaking to the rubber plug.

[0017] Optionally, the piston push rod has at least one annular groove, and the sealing ring is nested in the annular groove and contacts the groove wall.

[0018] Optionally, the air pipe connector is connected to the air inlet of the pneumatic component via an air pipe.

[0019] On the other hand, the present invention also provides an etching solution spraying system, the etching solution spraying system including at least one fixed-point spraying device as described in any of the above claims.

[0020] The fixed-point spraying device of this utility model receives an air source via a pneumatic component connected to an air pipe connector; an air valve regulates the airflow to form a controllable air pressure; a piston rod, driven by air pressure, presses against a rubber stopper; the rubber stopper is installed inside the cavity to seal the connection between the liquid inlet and outlet; the cavity includes a conductive etching solution inlet and an etching solution outlet; when air is supplied, the air pressure pushes the piston rod to press against the rubber stopper, blocking the liquid path; after the air is cut off, the piston releases, and the etching solution hydraulically pushes open the rubber stopper to restore the liquid path, allowing for directional spraying through the nozzle. Therefore, this utility model exhibits significant advantages in several aspects, including improved efficiency, resource conservation, improved spraying flexibility, precise control of the spraying location and flow rate, and shortened production cycle; with the continuous development of PCB manufacturing technology, fixed-point spraying technology will play an even more important role in the future. Attached Figure Description

[0021] Figure 1 This is a connection diagram of the fixed-point spraying device provided in an embodiment of the present invention;

[0022] Figure 2 This is a structural cross-sectional view of the fixed-point spraying device provided in an embodiment of the present invention;

[0023] Figure 3 An exploded view of the fixed-point spraying device provided in an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the etching solution spraying system provided in one embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of regions with different copper thicknesses on a circuit board. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] It should be noted that references to "an embodiment," "embodiment," "example embodiment," etc., in this specification refer to the described embodiment including specific features, structures, or characteristics, but not every embodiment must include these specific features, structures, or characteristics. Furthermore, such expressions do not refer to the same embodiment. Moreover, when describing specific features, structures, or characteristics in conjunction with embodiments, whether or not explicitly described, it is indicated that incorporating such features, structures, or characteristics into other embodiments is within the knowledge of those skilled in the art.

[0028] Before describing the various embodiments of this application in detail, the technical concept of this application is first briefly described: The fixed-point spraying device provided by this utility model uses pneumatic components to drive a piston pusher rod, precisely controlling the opening and closing of the rubber stopper at the liquid inlet and outlet of the cavity, thereby achieving dynamic adjustment of the etching solution spraying; specifically, when the pneumatic system stops supplying air, the etching solution hydraulically pushes the rubber stopper away from the cavity connection, and the liquid is sprayed to the designated area through the nozzle; when air is supplied, the air pressure drives the piston pusher rod to press the rubber stopper tightly, blocking the liquid flow; that is, this device can automatically compensate the spraying parameters for areas with different copper thicknesses by independently controlling the opening and closing time and flow rate of each nozzle, ensuring etching uniformity. Thus, this solution replaces the traditional manual nozzle blocking method with pneumatic-hydraulic linkage control, solving the pain points of low efficiency and insufficient precision, and has the advantages of automation, high flexibility and energy saving, making it suitable for the field of high-precision PCB manufacturing.

[0029] The specific principle of the fixed-point spraying device of this application will be described below with reference to specific embodiments.

[0030] Figure 1 This invention illustrates a fixed-point spraying device according to an embodiment of the present invention, comprising an air pipe connector 1, an air valve 3, a piston rod 5, a rubber stopper 6, a cavity 7, and a nozzle 9, wherein:

[0031] One end of the air pipe connector 1 is connected to the pneumatic component 10 to receive the gas supplied by the pneumatic component 10; the air valve 3 is connected to the other end of the air pipe connector 1 to adjust the gas flow rate output by the air pipe connector 1 to form air pressure; the piston push rod 5 is installed at the output end of the air valve 3 to press the rubber plug 6 under the pushing action of the air pressure generated by the air valve 3; the rubber plug 6 is installed inside a cavity 7 to block the connection of the liquid inlet and outlet pipes of the cavity 7 under the pressing action of the piston push rod 5; the cavity 7 is provided with a liquid inlet pipe and a liquid... The outlet pipe has a rubber plug 6 at the connection between the liquid inlet pipe and the liquid outlet pipe; the inlet of the liquid inlet pipe is used to receive the etching solution, and the outlet of the liquid outlet pipe is used to install the nozzle 9; when the pneumatic component 10 stops supplying gas to the air pipe joint 1, the piston rod 5 releases its pressing action on the rubber plug 6, and the rubber plug 6 releases its blockage at the connection between the liquid inlet and outlet pipes of the cavity 7 under the hydraulic action of the etching solution supplied by the liquid inlet pipe, so that the liquid inlet pipe and the liquid outlet pipe are connected.

[0032] See Figure 2In this embodiment, the connection between the liquid inlet and outlet pipes of the cavity 7 refers to the connection point where the liquid inlet pipe and the liquid outlet pipe inside the cavity 7 are connected. When the rubber stopper 6 is not blocking this connection point, the etching solution in the liquid inlet pipe will flow from the inlet to the connection point, then transfer at the connection point and flow into the liquid outlet pipe, and finally flow out from the outlet of the liquid outlet pipe. That is, this embodiment controls the pipe continuity state inside the cavity 7 by controlling whether the rubber stopper 6 blocks or releases the blockage at the connection point.

[0033] Specifically, the fixed-point spraying device has the following two working states:

[0034] 1. When the pneumatic component 10 is turned on, gas is continuously supplied to the air pipe connector 1. The air valve 3 generates air pressure to push the piston rod 5 to tighten the rubber plug 6. Under the tightening action of the piston rod 5, the rubber plug 6 blocks the connection between the liquid inlet pipe and the liquid outlet pipe in the cavity 7, thereby blocking the flow of etching liquid in the liquid inlet pipe to the liquid outlet pipe, so that the etching liquid cannot flow to the nozzle 9, thus achieving the function of shutting off the nozzle spraying etching liquid.

[0035] Second, when the pneumatic component 10 is turned off, the gas supply to the air pipe joint 1 stops. At this time, the air pressure cannot be generated to push the piston rod 5 to tighten the rubber stopper 6. Meanwhile, the liquid inlet pipe of the cavity 7 continuously inputs etching liquid to the connection between the liquid inlet pipe and the liquid outlet pipe, causing the rubber stopper 6 to release its blocking effect on the connection under the hydraulic action of the etching liquid. This allows the etching liquid to flow from the connection to the liquid outlet pipe and finally to the nozzle 9 at the bottom, from which the etching liquid can be sprayed outward.

[0036] The fixed-point spraying device controls the opening and closing of the etching solution spraying through a gas-liquid linkage, achieving an automated and controllable spraying effect and effectively improving production efficiency.

[0037] As shown in the figure, in this embodiment, the air pipe connector 1 is connected to the air inlet of the pneumatic component 10 through an air pipe 11; when the pneumatic component 10 starts working, gas is input into the air pipe connector 1 through the air pipe 11; and the pneumatic component 10 can be automatically triggered to start or stop by the control unit or computer, thereby achieving precise control of the spraying of the fixed-point spraying device.

[0038] In this embodiment, the output end of the air valve 3 is provided with a groove, and the bottom of the inner groove is connected to the airflow pipe of the air valve 3. The piston push rod 5 is located in the groove and the outer end face of the piston push rod is in contact with the rubber stopper 6. Specifically, the piston push rod 5 has a certain mobility in this groove, that is, the piston push rod 5 can be pushed outward a certain distance under the push of air pressure. This pushing distance is just enough to press the rubber stopper 6 tightly and make the rubber stopper 6 block the connection between the liquid inlet pipe and the liquid outlet pipe inside the cavity 7.

[0039] join Figure 3 The piston rod 5 is provided with at least one sealing ring 4, which is used to seal the gas at the bottom of the groove from leaking to the rubber plug 6. Specifically, the piston rod 5 is provided with at least one annular groove, and the sealing ring 4 is nested in the annular groove and contacts the groove wall.

[0040] In this embodiment, the inlet of the liquid inlet pipe is located at the top of the cavity 7, and the outlet of the liquid outlet pipe is located at the bottom of the cavity 7. Both the liquid inlet pipe and the liquid outlet pipe have an L-shaped structure, and the connection between the liquid inlet pipe and the liquid outlet pipe is located at the side end opening of the cavity 7. The side end opening is connected to the air valve 3, and the piston push rod 5 and the rubber plug 6 are located at the connection between the air valve 3 and the side end opening.

[0041] Furthermore, the air valve 3 is connected and fixed to the side opening of the cavity 7 by a screw cap 2.

[0042] Furthermore, the outlet of the liquid outlet pipe is screwed to a nozzle base 8, and the nozzle 9 is installed on the nozzle base 8.

[0043] The fixed-point spraying device provided in this embodiment realizes controlled spraying, effectively and accurately spraying etching solution, ensuring that the etching solution is evenly sprayed to the designated position, saving the cost of the solution; it can also automatically adjust the spraying parameters and time according to conditions and needs; and improve the accuracy and flexibility of spraying, greatly reducing errors caused by human intervention; thus improving production efficiency.

[0044] Figure 4 This invention illustrates an etching solution spraying system according to another embodiment of the present invention, the etching solution spraying system including at least one fixed-point spraying device as described in the above embodiments.

[0045] In this etching solution spraying system, an air pipe connector can be connected to multiple fixed-point spraying devices via a pneumatic component, and the corresponding air pipe can be controlled by a controllable switch valve to control the air supply or shut-off of the corresponding fixed-point spraying device; thus, this embodiment can automatically and controllably adjust the working state of the corresponding fixed-point spraying device.

[0046] Specifically, this system has several nozzles installed perpendicular to the working direction. Each nozzle can be independently controlled, and each nozzle is equipped with a different number of fixed-point spray devices, each of which can also be individually controlled. For example... Figure 5 The copper thickness in area A is greater than that in area B. Based on the copper thickness location, the etching time can be compensated by controlling the area corresponding to the copper thickness of a single nozzle to remove excess copper and achieve a uniform thickness on the board surface before etching.

[0047] In summary, the fixed-point spraying device of this utility model receives an air source via a pneumatic component connected to an air pipe connector; an air valve regulates the airflow to form controllable air pressure; a piston push rod, driven by air pressure, presses against a rubber stopper; the rubber stopper is installed inside the cavity to seal the connection between the liquid inlet and outlet; the cavity includes a conductive etching solution inlet and an etching solution outlet; when air is supplied, the air pressure pushes the piston push rod to press against the rubber stopper, blocking the liquid path; after the air is cut off, the piston releases, and the etching solution hydraulically pushes open the rubber stopper to restore the liquid path, allowing for directional spraying through the nozzle. Therefore, this utility model exhibits significant advantages in several aspects, including improved efficiency, resource conservation, enhanced spraying flexibility, precise control of the spraying location and flow rate, and shortened production cycle; with the continuous development of PCB manufacturing technology, fixed-point spraying technology will play an even more important role in the future.

[0048] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A fixed-point spraying device, characterized in that, Including: An air hose connector, one end of which is connected to a pneumatic component to receive gas delivered by the pneumatic component; An air valve, connected to the other end of the air pipe connector, is used to adjust the gas flow rate output by the air pipe connector to form air pressure; A piston push rod is installed at the output end of the air valve to press the rubber plug against the air pressure generated by the air valve. The rubber stopper is installed inside a cavity to block the connection between the liquid inlet and outlet pipes of the cavity under the pressing action of the piston rod. The cavity has a liquid inlet pipe and a liquid outlet pipe inside, and the connection between the liquid inlet pipe and the liquid outlet pipe is provided with the rubber plug; the inlet of the liquid inlet pipe is used to receive the etching solution, and the outlet of the liquid outlet pipe is used to install a nozzle. When the pneumatic component stops supplying gas to the air pipe joint, the piston rod releases its pressing action on the rubber plug. Under the hydraulic pressure of the etching liquid supplied by the liquid inlet pipe, the rubber plug releases its blockage at the connection between the liquid inlet and outlet pipes of the cavity, so that the liquid inlet pipe and the liquid outlet pipe are connected.

2. The fixed-point spraying device according to claim 1, characterized in that, The output end of the air valve is provided with a groove, and the bottom of the inner groove is connected to the airflow pipe of the air valve. The piston push rod is located in the groove and the outer end face of the piston push rod is in contact with the rubber plug.

3. The fixed-point spraying device according to claim 1, characterized in that, The inlet of the liquid inlet pipe is located at the top of the cavity, and the outlet of the liquid outlet pipe is located at the bottom of the cavity. Both the liquid inlet pipe and the liquid outlet pipe are L-shaped. The connection between the liquid inlet pipe and the liquid outlet pipe is located at the opening on one side of the cavity. The opening on the side is connected to the air valve. The piston push rod and the rubber plug are located at the connection between the air valve and the opening on the side.

4. The fixed-point spraying device according to claim 3, characterized in that, The air valve is fixed to the side opening of the cavity by a screw cap.

5. The fixed-point spraying device according to claim 1, characterized in that, The outlet of the liquid outlet pipe is screwed to a nozzle base, and the nozzle is mounted on the nozzle base.

6. The fixed-point spraying device according to claim 2, characterized in that, The piston push rod is provided with at least one sealing ring, which is used to prevent gas at the bottom of the groove from leaking into the rubber plug.

7. The fixed-point spraying device according to claim 6, characterized in that, The piston push rod has at least one annular groove, and the sealing ring is nested in the annular groove and contacts the groove wall.

8. The fixed-point spraying device according to claim 1, characterized in that, The air pipe connector is connected to the air inlet of the pneumatic component via an air pipe.

9. An etching solution spraying system, characterized in that, The etching solution spraying system includes at least one fixed-point spraying device as described in any one of claims 1 to 8.

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