A PCB etching machine
By integrating a stirring plate and a bubble plate into the etching chamber, the problem of insufficient mixing in existing etching machines is solved, achieving uniform etching of the solution and efficient production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU JIERIJIA TECHNOLOGY CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-05
AI Technical Summary
Existing etching machines take a long time to mix the etchant and water, resulting in insufficient mixing and low etching efficiency. Furthermore, the fixed bottom of the jet pipe heating rod affects the mixing effect.
Design a PCB etching machine that uses a single etching chamber for chemical preparation, mixing, and etching. Utilize a combination of a stirring plate and a bubble plate, driven by a motor to rotate the stirring plate and bubble plate, combined with a heating rod for uniform heating and stirring, reducing the need for an additional mixing chamber.
It achieves thorough mixing and uniform etching of the solution, improves etching efficiency, reduces container usage, and enhances the mixing effect.
Smart Images
Figure CN224329673U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of etching machine technology, and in particular to an etching machine for PCB boards. Background Technology
[0002] Etching is an essential step in PCB manufacturing, and it is performed by an etching machine. Existing etching machines typically have three etching tanks, requiring the addition of etchant and water to each tank, necessitating manual mixing. Generally, the mixture is directly added to the etching tank and an air pump is activated for automatic dissolution and mixing. This process is time-consuming, results in insufficient mixing, and leads to low etching efficiency. Therefore, this application provides a PCB etching machine that improves etching uniformity to meet this need. An existing application (CN202221143508.3) describes a PCB etching machine that improves etching uniformity, relating to the field of etching machines… It involves thoroughly mixing water and etchant, with a first water pump drawing the mixed etching solution into an etching tank. A heating element is activated to adjust the temperature, and then an air pump is activated to inject air bubbles into the etching tank, effectively etching the PCB board uniformly and improving etching efficiency. However, this device uses a mixing tank and an etching tank for mixing, which is wasteful, and the air jet and heating element are fixed to the bottom, preventing proper mixing and affecting time and effectiveness. Utility Model Content
[0003] The purpose of this invention is to address the shortcomings of existing technologies, such as the wastefulness of using mixing and etching boxes for mixing, and the inability to mix properly due to the fixed bottom of the jet pipe heating rod, which affects the timing and effect. Therefore, this invention proposes a PCB etching machine.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] Design a PCB etching machine, including a frame, an etching solution tank, and a water tank. The water tank, etching solution tank, and hydraulic cylinder are fixedly mounted on the top plate of the frame. The telescopic rod of the hydraulic cylinder passes through the top plate and is fixedly connected to a sealing cover. An etching chamber is fixedly mounted at the bottom of the sealing cover, and a ejector pin is fixedly mounted at the bottom of the etching chamber. A circular hole is formed in the middle plate of the frame, and the etching chamber is fixedly mounted inside the circular hole. A circular hole is formed at the bottom of the etching chamber, and a disc is rotatably mounted inside the circular hole via a sealed bearing. Several insertion holes are formed on the upper surface of the disc, and insertions are made into these holes. The device comprises several stirring plates and a bubble tube driven by a driving device located at the center. The lower ends of the stirring plates and the bubble tube are fixedly connected to a chassis, and the bottom of the chassis is supported by a lifting device. The top of the bubble tube is fixedly provided with a bubble plate that abuts against a pin, and the top of the bubble plate has several bubble holes. The interior of the etching chamber is fixedly provided with heating rods located on both sides of the etching chamber and between the stirring plates and the two small plates through two small plates. The etching chamber and the water tank are connected to the etching chamber through pipes and valves. The surface of the etching chamber has air holes.
[0006] Preferably, a waste liquid tank is fixed on the base plate of the frame, and the waste liquid tank is connected to the etching tank through a pipe.
[0007] Preferably, the stirring plates include two sets of stirring plates arranged in a circumferential array, with the two sets of stirring plates tilting in opposite directions. The bubble plate is shaped like a cross, with the center of the cross abutting against a pin.
[0008] Preferably, the steam injection device includes a fixed plate and a connector. The upper end of the connector is rotatably connected to the lower end of the bubble tube through a sealed bearing. The lower end of the connector is connected to the air pump through a pipe. The outer wall of the connector is fixedly connected to the fixed plate, and the other end of the fixed plate is fixedly connected to the support column.
[0009] Preferably, the driving device includes a motor and a gear. The motor is fixedly mounted on the base plate of the frame by a bracket. The output shaft of the motor is fixedly mounted on a gear, and the gear meshes with a large gear fixedly mounted on the outer wall of the lower end of the bubble tube.
[0010] Preferably, the lifting device includes a column and a spring. The column is fixed on the base plate of the frame, a support is sleeved on the upper outer wall of the column, and a spring is sleeved on the outer wall of the column, with the upper end of the spring abutting against the support.
[0011] Preferably, the top of the support column is provided with a spherical groove, and a ball bearing is rotatably disposed in the spherical groove, the top of the ball bearing being rotatably connected to the chassis.
[0012] The etching machine for plates proposed in this utility model has the following advantages: the etching machine can not only carry out the proportioning, mixing and etching of the chemical solution and the etching of the plate in one etching box without the need for an additional box for mixing, thus reducing the use of containers, but also can stir through the bubble plate during etching, making the bubbles and heating more uniform. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of an etching machine for a PCB board according to the present invention;
[0014] Figure 2 This is a schematic diagram of a PCB etching machine board placement mesh box structure proposed in this utility model;
[0015] Figure 3 This is a schematic diagram of the drive structure of an etching machine for a PCB board proposed in this utility model;
[0016] Figure 4 This is a schematic diagram of the bubble device structure of an etching machine for a PCB board according to the present invention.
[0017] Figure 5 This is a schematic diagram of the ball bearing structure of an etching machine for a PCB board according to the present invention.
[0018] In the diagram: 1. Frame; 2. Etching box; 3. Plate placement cage; 4. Water tank; 5. Hydraulic cylinder; 6. Etching solution tank; 7. Stirring plate; 8. Chassis; 9. Motor; 10. Support column; 11. Vertical column; 12. Spring; 13. Fixing plate; 14. Waste liquid tank; 15. Ejector pin; 16. Air hole, bubble tube; 17. Connector; 18. Disc; 19. Heating rod; 20. Bubble plate; 21. Ball bearing. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0020] Reference Figure 1-5An etching machine for PCB boards includes a frame 1, an etching solution tank 6, and a water tank 4. The water tank 4, etching solution tank 6, and hydraulic cylinder 5 are fixedly mounted on the top plate of the frame 1. The telescopic rod of the hydraulic cylinder 5 passes through the top plate and is fixedly connected to a sealing cover. An etching chamber 2 is fixedly mounted at the bottom of the sealing cover, and a ejector pin 15 is fixedly mounted at the bottom of the etching chamber 2. A circular hole is opened in the middle plate of the frame 1, and the etching chamber 2 is fixedly mounted inside the circular hole. A circular hole is opened at the bottom of the etching chamber 2, and a disc 19 is rotatably mounted inside the circular hole via a sealed bearing. Several insertion holes are opened on the upper surface of the disc 19, and several stirring plates are inserted into the insertion holes. 7 and a bubble tube 17 driven by a driving device located at the center, several stirring plates 7 and the lower end of the bubble tube 17 are fixedly connected to a base plate 8, and the bottom of the base plate 8 is provided with a support column 10 through a lifting device. The top of the bubble tube 17 is fixedly provided with a bubble plate 21 that abuts against the top of the ejector pin 15, and several bubble holes are opened on the top of the bubble plate 21. The interior of the etching box 2 is fixedly provided with heating rods 20 located on both sides of the etching box 2 and between several rotating stirring plates 7 through two small plates. The etching box 2 and the water tank 4 are connected to the etching box 2 through pipes and valves. The surface of the etching box 2 is provided with air holes 16.
[0021] Waste liquid tank 14 is fixed on the base plate of frame 1, and waste liquid tank 14 is connected to etching tank 2 through a pipe.
[0022] The stirring plates 7 include two sets of stirring plates 7 arranged in a circumferential array, with the two sets of stirring plates 7 tilted in opposite directions. The bubble plate 21 is shaped like a cross, and the center of the cross abuts against the ejector pin 15.
[0023] The steam injection device includes a fixed plate 13 and a connector 18. The upper end of the connector 18 is rotatably connected to the lower end of the bubble tube 17 through a sealed bearing. The lower end of the connector 18 is connected to the air pump through a pipe. The fixed plate 13 is fixedly connected to the outer wall of the connector 18, and the other end of the fixed plate 13 is fixedly connected to the support column 10.
[0024] The drive device includes a motor 9 and a gear. The motor 9 is fixed on the base plate of the frame 1 by a bracket. The output shaft of the motor 9 is fixed with a gear, and the gear meshes with a large gear fixed on the lower outer wall of the bubble tube 17.
[0025] The lifting device includes a column 11 and a spring 12. The column 11 is fixed on the base plate of the frame 1. The upper outer wall of the column 11 is fitted with a support column 10. The outer wall of the column 11 is fitted with a spring 12, and the upper end of the spring 12 abuts against the support column 10.
[0026] The top of the support column 10 is provided with a spherical groove, and a ball bearing 22 is rotatably provided in the spherical groove. The top of the ball bearing 22 is rotatably connected to the chassis 8.
[0027] Working principle: After opening etching tank 2 and water tank 4 and injecting water into etching tank 2 according to the ratio, start the motor to drive the stirring plate 7 and the base plate 8 to rotate and mix. After mixing, the hydraulic cylinder 5 drives the PCB board to be placed in the mesh box 3 and descends. The stirring plate 7 and the bubble plate 21 are pressed down by the ejector pin 15 to reach the bottom. The air pump injects air into the bubble tube 17 and the bubble plate 21 through the connector 18 to generate bubbles. The liquid is heated by the heating rod 20. The motor drives the stirring plate 7 and the bubble plate 21 to rotate, so that the bubbles are released and the heated liquid flows and mixes evenly.
[0028] This etching machine can not only perform the preparation, mixing, and etching of PCB boards in one etching chamber 2 without the need for an additional chamber for mixing, thus reducing the use of containers, but also can stir through the bubble plate 21 during etching, making the bubbles and heating more uniform.
[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A PCB etching machine, comprising a frame (1), an etching solution tank (6), and a water tank (4), characterized in that, A water tank (4), an etching solution tank (6), and a hydraulic cylinder (5) are fixedly mounted on the top plate of the frame (1). The telescopic rod of the hydraulic cylinder (5) passes through the top plate and is fixedly connected to the sealing cover. An etching box (2) is fixedly mounted at the bottom of the sealing cover. A pin (15) is fixedly mounted at the bottom of the etching box (2). A circular hole is opened on the middle plate of the frame (1), and an etching box (2) is fixedly mounted inside the circular hole. A circular hole is opened at the bottom of the etching box (2), and a disc (19) is rotatably mounted inside the circular hole through a sealed bearing. Several insertion holes are opened on the upper surface of the disc (19), and several stirring plates (7) and a gas driven by a driven device located at the center are inserted into the insertion holes. The bottom of the bubble tube (17), several stirring plates (7) and the bubble tube (17) are fixedly connected to a base plate (8), and the bottom of the base plate (8) is provided with a support column (10) through a lifting device. The top of the bubble tube (17) is fixedly provided with a bubble plate (21) that abuts against the top pin (15), and several bubble holes are opened on the top of the bubble plate (21). The inside of the etching box (2) is fixedly provided with heating rods (20) located on both sides of the etching box (2) and in the gap between several rotating stirring plates (7) through two small plates. The etching box (2) and the water tank (4) are connected to the etching box (2) through pipes and valves. The surface of the etching box (2) is provided with air holes (16).
2. The PCB etching machine according to claim 1, characterized in that, Waste liquid tank (14) is fixed on the base plate of the frame (1), and the waste liquid tank (14) is connected to the etching tank (2) through a pipe.
3. The PCB etching machine according to claim 1, characterized in that, The stirring plates (7) include two sets of stirring plates (7) arranged in a circumferential array, with the two sets of stirring plates (7) tilting in opposite directions. The bubble plate (21) is shaped like a cross, with the center of the cross abutting the ejector pin (15).
4. The PCB etching machine according to claim 1, characterized in that, The steam injection device includes a fixed plate (13) and a connector (18). The upper end of the connector (18) is rotatably connected to the lower end of the bubble tube (17) through a sealed bearing. The lower end of the connector (18) is connected to the air pump through a pipe. The outer wall of the connector (18) is fixedly connected to the fixed plate (13), and the other end of the fixed plate (13) is fixedly connected to the support column (10).
5. The PCB etching machine according to claim 1, characterized in that, The driving device includes a motor (9) and a gear. The motor (9) is fixed on the bottom plate of the frame (1) by a bracket. The output shaft of the motor (9) is fixed with a gear, and the gear meshes with a large gear fixed on the lower outer wall of the bubble tube (17).
6. The PCB etching machine according to claim 1, characterized in that, The lifting device includes a column (11) and a spring (12). The column (11) is fixed on the bottom plate of the frame (1). The upper outer wall of the column (11) is fitted with a support column (10). The outer wall of the column (11) is fitted with a spring (12), and the upper end of the spring (12) abuts against the support column (10).
7. The PCB etching machine according to claim 1, characterized in that, The top of the support column (10) is provided with a spherical groove, and a ball bearing (22) is rotatably provided in the spherical groove. The top of the ball bearing (22) is rotatably connected to the chassis (8).