Etching apparatus for printed wiring board development

Abstract

The utility model discloses an etching equipment for printed circuit board development, including frame, conveying roller and be in the etching box and liquid collecting hopper of frame upper and lower two sides, be equipped with liquid storage tank on the etching box, and be equipped with the spray frame in the etching box, install the spray mechanism in this spray frame, the spray mechanism is linked together with the liquid storage tank through the liquid guide hard pipe, liquid guide hose and pump, the pump is fixed on the support of mounting frame, and the support still is equipped with the reduction motor and eccentric wheel under, the liquid guide hard pipe outside fixed mounting has the swing disc, and the swing disc is hinged with the connecting rod between eccentric wheel, be equipped with the protective soft cover between the mounting frame and the spray frame. The utility model discloses a drive mechanism that reduction motor, eccentric wheel and connecting rod constitute, drive whole spray frame and its inside spray mechanism to carry out reciprocating swing, make the etching liquid beam that nozzle sprays is with certain angle periodically sweep circuit board surface, has guaranteed that each corner of circuit board can be fully, evenly etched.

Description

Technical Field

[0001] This utility model relates to the technical field of printed circuit board processing equipment, and in particular to an etching device for the development of printed circuit boards. Background Technology

[0002] Etching is a critical process in the research, development, and small-batch production of printed circuit boards (PCBs). Traditional etching equipment typically uses a fixed spray system, where the etching solution is sprayed vertically onto the board surface through nozzles.

[0003] However, this static spraying method can easily produce a "shadowing effect" on boards with complex circuits or tiny depressions, resulting in uneven etching, with some areas being over-etched and others under-etched. Secondly, since the nozzles are relatively stationary with respect to the board surface, they can easily form fixed liquid flow tracks on the board surface, affecting the uniformity of etching quality.

[0004] To address these issues, we propose an etching equipment for printed circuit board manufacturing. Utility Model Content

[0005] The purpose of this invention is to provide an etching device for the development of printed circuit boards, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An etching device for printed circuit board manufacturing includes a frame, a conveyor roller, and etching chambers and liquid collection hoppers located on the upper and lower sides of the frame. The etching chambers are equipped with a liquid storage tank and a spray frame. A spraying mechanism is installed inside the spray frame. The spraying mechanism is connected to the liquid storage tank through a liquid guiding hard pipe, a liquid guiding soft pipe, and a liquid pump. The liquid pump is fixed on a bracket of the mounting frame, and a geared motor and an eccentric wheel are also installed under the bracket. A rocking plate is fixedly installed outside the liquid guiding hard pipe, and a connecting rod is hinged between the rocking plate and the eccentric wheel. A protective soft cover is installed between the mounting frame and the spray frame.

[0008] In a further embodiment, the spraying mechanism includes a plurality of annular tubes arranged in concentric circles, the annular tubes being connected by straight tubes, and a plurality of nozzles being uniformly arranged below the annular tubes.

[0009] In a further embodiment, the nozzles of adjacent annular tubes are staggered.

[0010] In a further embodiment, the tray adopts an L-shaped structure, with the vertical plate of the tray fixed to the bracket, and the horizontal plate of the tray rotatably connected to the shaft of the eccentric wheel through a bearing.

[0011] In a further embodiment, a slide rail is also installed under the bracket via a hanger, and a slider is slidably connected under the slide rail, the slider being fixed to the top of the spray frame.

[0012] In a further embodiment, the inner edges of the lower port of the protective soft cover are connected to the outer edges of the spray frame by sealant, and the inner edges of the upper port of the protective soft cover are connected to the outer edges of the mounting frame by sealant.

[0013] In a further embodiment, the protective soft cover adopts a bucket-shaped structure that is wider at the top and narrower at the bottom.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention uses a drive mechanism consisting of a geared motor, an eccentric wheel, and a connecting rod to drive the entire spray frame and its internal spray mechanism to reciprocate and swing, so that the etching liquid jet sprayed from the nozzles periodically sweeps across the surface of the circuit board at a certain angle, ensuring that all corners of the circuit board can be fully and evenly etched, which is particularly suitable for the development of fine circuits.

[0016] This utility model integrates the drive components on top using an mounting frame and connects them to the spray frame below via a protective soft cover. The structure is reasonable and saves space. The protective soft cover adopts a bucket-shaped structure and is connected at both ends with sealant, forming a reliable sealing barrier that effectively prevents corrosive etching solution mist from eroding the precision drive components above and extends the service life of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the etching box of this utility model;

[0019] Figure 3 This is a schematic diagram of the installation structure of the protective soft cover and spraying mechanism of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the protective soft cover of this utility model.

[0021] In the diagram: 1. Frame; 2. Conveyor roller; 3. Etching box; 4. Liquid collection hopper; 5. Spray frame; 6. Spraying mechanism; 61. Annular pipe; 62. Straight pipe; 63. Nozzle; 7. Liquid storage tank; 8. Liquid guiding rigid pipe; 9. Liquid guiding flexible pipe; 10. Liquid pump; 11. Swing plate; 12. Connecting rod; 13. Eccentric wheel; 14. Gear motor; 15. Bracket; 16. Mounting frame; 17. Support plate; 18. Hanging rod; 19. Slide rail; 20. Slider; 21. Protective soft cover. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 An etching apparatus for developing printed circuit boards includes a frame 1, conveyor rollers 2, an etching box 3, and a collection hopper 4. The conveyor rollers 2 are equidistantly distributed within the frame 1 along the conveying direction for conveying the printed circuit boards to be etched. The etching box 3 is mounted on the frame 1, and a storage tank 7 is provided above the etching box 3 for temporarily storing etching solution. The storage tank 7 is connected to an external etching solution production device (not shown in the figure) via a pipe. The collection hopper 4 is installed below the frame 1 for collecting the etched liquid, and the collection hopper 4 is connected to an external etching solution recovery device (not shown in the figure) via a pipe.

[0026] The etching chamber 3 is equipped with a spray frame 5, and a spray mechanism 6 is fixedly installed inside the spray frame 5. The spray mechanism 6 consists of multiple annular tubes 61 arranged in concentric circles. The annular tubes 61 are connected by straight tubes 62 to form a complete flow channel network. Multiple nozzles 63 for spraying etching liquid are evenly installed on the lower surface of all annular tubes 61. In order to optimize the coverage effect, the nozzles 63 on adjacent annular tubes 61 adopt an interlaced layout to improve the uniformity of liquid spraying.

[0027] The spraying mechanism 6 is connected to the storage tank 7 via a liquid guiding rigid pipe 8, a liquid guiding flexible pipe 9, and a liquid pump 10. After the liquid pump 10 is started, it pumps the etching solution out of the storage tank 7, which is then transported to the spraying mechanism 6 via the liquid guiding flexible pipe 9 and the liquid guiding rigid pipe 8, and finally sprayed out from the nozzle 63.

[0028] The pump 10 is fixed on a bracket 15, which is fixed inside a mounting frame 16. Below the bracket 15, a geared motor 14 is mounted via an L-shaped support plate 17. The vertical plate of the support plate 17 is fixed to the bracket 15, and its horizontal plate is rotatably connected to the shaft of the eccentric wheel 13 via a bearing. The output shaft of the geared motor 14 is connected to this shaft to drive the eccentric wheel 13 to rotate.

[0029] The liquid guiding tube 8 is fixed at the position where it passes through the spray frame 5. A swing disk 11 is fixedly installed on its outside. The swing disk 11 is hinged to the eccentric wheel 13 through the connecting rod 12. When the reduction motor 14 drives the eccentric wheel 13 to rotate, the circular motion is converted into the reciprocating swing of the swing disk 11 through the connecting rod 12, thereby driving the entire liquid guiding tube 8 and the spray frame 5 and spray mechanism 6 fixed thereto to swing left and right together.

[0030] In order to support and guide the swaying motion of the spray frame 5, a slide rail 19 is installed below the support 15 via a hanger 18. The slider 20 is slidably connected to the slide rail 19, and the slider 20 is fixed to the top of the spray frame 5, so that the spray frame 5 moves smoothly and steadily when swaying.

[0031] Between the mounting frame 16 and the spray rack 5, a bucket-shaped protective soft cover 21, which is wider at the top and narrower at the bottom, is installed. The inner edge of the upper port of the protective soft cover 21 is connected to the outer edge of the mounting frame 16, and the inner edge of the lower port is connected to the outer edge of the spray rack 5, thereby forming a sealed space that isolates the drive components from the etching environment below, thus providing good corrosion protection.

[0032] Workflow: The entire equipment is powered by an external power supply. First, the printed circuit board to be etched is placed on the conveyor roller 2, which is then fed into the processing area inside the etching chamber 3. The liquid pump 10 is started to continuously pump the etching solution from the storage tank 7 into the spray mechanism 6. At the same time, the geared motor 14 is started to drive the eccentric wheel 13 to rotate. Through the connecting rod 12, the oscillating disk 11 and the liquid guiding hard pipe 8 are driven to oscillate back and forth. The oscillation is transmitted to the entire spray mechanism 6 through the spray frame 5, so that all the nozzles 63 oscillate while spraying, thus dynamically and uniformly etching the circuit board below. The used etching solution and reaction products drip into the collection hopper 4 below, where they are collected for recycling or discharge. After etching is completed, the geared motor 14 is stopped, the spray mechanism 6 stops oscillating, and the liquid pump 10 is stopped after a short delay to flush the pipeline. Finally, the etched circuit board is sent out of the equipment.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An etching apparatus for printing circuit board fabrication, comprising a frame (1), a conveyor roller (2), and etching chambers (3) and a liquid collection hopper (4) located on the upper and lower sides of the frame (1), characterized in that: The etching box (3) is provided with a liquid storage tank (7) and a spray rack (5) is provided inside the etching box (3). A spraying mechanism (6) is installed inside the spray rack (5). The spraying mechanism (6) is connected to the liquid storage tank (7) through a liquid guiding hard pipe (8), a liquid guiding soft pipe (9) and a liquid pump (10). The liquid pump (10) is fixed on the bracket (15) of the mounting frame (16). A reduction motor (14) and an eccentric wheel (13) are also installed under the bracket (15). A swing plate (11) is fixedly installed outside the liquid guiding hard pipe (8). A connecting rod (12) is hinged between the swing plate (11) and the eccentric wheel (13). A protective soft cover (21) is installed between the mounting frame (16) and the spray rack (5).

2. The etching equipment for printed circuit board fabrication according to claim 1, characterized in that: The spraying mechanism (6) includes a plurality of annular pipes (61) arranged in concentric circles. The annular pipes (61) are connected to each other by straight pipes (62), and a plurality of nozzles (63) are evenly distributed under the annular pipes (61).

3. The etching equipment for printed circuit board fabrication according to claim 2, characterized in that: The nozzles (63) of adjacent annular pipes (61) are staggered.

4. The etching equipment for printed circuit board fabrication according to claim 1, characterized in that: The tray (17) adopts an L-shaped structure. The vertical plate of the tray (17) is fixed to the bracket (15), and the horizontal plate of the tray (17) is rotatably connected to the shaft of the eccentric wheel (13) through the bearing.

5. The etching equipment for printed circuit board fabrication according to claim 1, characterized in that: The bracket (15) is also equipped with a slide rail (19) via a hanger (18), and a slider (20) is slidably connected to the slide rail (19). The slider (20) is fixed to the top of the spray frame (5).

6. The etching equipment for printed circuit board fabrication according to claim 1, characterized in that: The inner edge of the lower port of the protective soft cover (21) is connected to the outer edge of the spray frame (5) by sealant, and the inner edge of the upper port of the protective soft cover (21) is connected to the outer edge of the mounting frame (16) by sealant.

7. The etching equipment for printed circuit board fabrication according to claim 1, characterized in that: The protective soft cover (21) adopts a bucket-shaped structure that is wider at the top and narrower at the bottom.

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