Inclined non-contact conveying mechanism

Abstract

The utility model provides an inclined non-contact transmission mechanism, which comprises a PCB (printed circuit board) carrier plate, a roller component and a spraying device, the PCB carrier plate is obliquely limited on the roller component, the roller component drives the PCB carrier plate, and the transmission direction is perpendicular to the inclination direction of the PCB carrier plate; the spraying device comprises a plurality of nozzles which are distributed on the upper portion and the lower portion of the PCB carrier plate, and the nozzles are inclined and are perpendicular to the surface of the PCB carrier plate. Therefore, according to the utility model, the'pool 'effect of the PCB surface can be effectively solved, and meanwhile, the condition that the circuit is damaged in the transmission process can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of circuit board packaging, and in particular to an inclined non-contact conveying mechanism. Background Technology

[0002] In current double-sided simultaneous spray etching processes for PCB boards, the etching speed and uniformity are clearly better on the lower surface than on the upper surface, with the etching speed around the edges of the upper surface being faster than in the center. This is mainly because a "pool" of etching solution forms on the upper surface of the PCB board during typical spray etching, affecting etching uniformity and causing lateral etching. Although improving the nozzle structure and spray bar oscillation method can reduce the number of "pools" on the board surface and improve etching uniformity, the "pools" still exist, negatively impacting the etching precision of fine lines and thick steel foil.

[0003] With the development of semiconductor electronics technology, the precision requirements for circuit boards are becoming increasingly stringent, reaching line widths and spacings of 15 micrometers or even finer lines. New additive manufacturing processes are also being adopted. However, the traditional roller-based pressing method can damage the circuit board's lines, especially during development. The pressure of the rollers can damage the developing film on the circuit board, leading to development defects and potentially causing open circuits or broken circuits.

[0004] Therefore, it is urgent to improve the existing circuit board transmission mechanism. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this invention is to provide an inclined non-contact conveying mechanism to solve the "pool" effect on the PCB board surface and to prevent the circuit from being damaged during the conveying process.

[0006] To achieve the above objectives, this utility model provides an inclined non-contact conveying mechanism, including a PCB carrier board, a roller assembly, and a spraying device. The PCB carrier board is inclined and limited on the roller assembly, and the roller assembly drives the PCB carrier board in a direction perpendicular to the inclination direction of the PCB carrier board. The spraying device includes a plurality of nozzles distributed on the upper and lower sides of the PCB carrier board, and the nozzles are inclined and perpendicular to the surface of the PCB carrier board.

[0007] Furthermore, the roller assembly includes a wheel, a wheel rubber ring, and a shaft core. The shaft core includes an upper shaft core and a lower shaft core, and multiple shaft cores are spaced apart. The PCB carrier board is located between the upper shaft core and the lower shaft core. The wheel is mounted on the shaft core and contacts the surface of the PCB carrier board through the wheel rubber ring. When the wheel rotates, the PCB carrier board is moved by the transmission of the wheel rubber ring.

[0008] Furthermore, the end of the shaft is mounted on a PEEK bearing for positioning and fixation by the PEEK bearing.

[0009] Furthermore, each of the shaft cores is equipped with three of the wheel pieces, and the wheel pieces are positioned in a designated area of ​​the PCB carrier board, the designated area corresponding to the invalid area of ​​the PCB board.

[0010] Furthermore, the spraying device also includes a pump, a filter, and a ball valve, with the pump connected in pipeline to the filter, the ball valve, and the nozzle in sequence.

[0011] Furthermore, a pressure gauge is provided in the pipeline between the ball valve and the nozzle.

[0012] Furthermore, it also includes a power assembly that is drively connected to the roller assembly for driving the roller assembly.

[0013] The tilted non-contact conveying mechanism of this utility model mainly consists of a tilted PCB carrier, a roller assembly, and a spraying device. The PCB carrier is limited by upper and lower shafts distributed vertically. The ends of the shafts are fixed with PEEK bearings, and the surfaces are fitted with wheels equipped with rubber rings. Friction transmission causes the PCB to move along a horizontal path perpendicular to the tilt direction. The wheels are arranged in ineffective areas of the PCB, with three wheels on each shaft to reduce contact damage. The spraying system includes upper and lower nozzle assemblies tilted perpendicular to the PCB surface. A circulation pipeline is formed by a pump, filter, and ball valve, and a pressure gauge is provided for real-time monitoring. The mechanism, combined with a power component, drives the rollers to achieve continuous conveying. Its tilted design effectively solves the "pool" effect on the PCB surface through gravity; it also assists in non-contact transmission and optimizes the uniformity of spray coverage. It is particularly suitable for cleaning or surface treatment stages in PCB manufacturing, effectively avoiding scratches and contamination problems caused by traditional contact conveying. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the inclined non-contact conveying mechanism provided in an embodiment of the present invention;

[0015] Figure 2 A schematic diagram of the main structure of the inclined non-contact conveying mechanism provided in an embodiment of the present utility model;

[0016] Figure 3 A partial structural schematic diagram of the inclined non-contact conveying mechanism provided in an embodiment of the present utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the inclined non-contact conveying mechanism provided in an embodiment of the present invention. Detailed Implementation

[0018] 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.

[0019] 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.

[0020] The embodiments described below mainly involve a tilted non-contact conveyor mechanism in vertical developing DES (Developing Etching Stripping) production. The purpose is to address the negative impact of the "pool" on the board surface on the etching accuracy of fine lines and thick steel foil. Furthermore, the non-contact conveyor method solves the problem that traditional roller-based transmission methods can damage the circuitry of some high-precision circuit boards.

[0021] Figures 1-4 This invention illustrates an embodiment of a tilting non-contact conveying mechanism, comprising a PCB carrier board 2, a roller assembly, and a spraying device. The PCB carrier board 2 is tilted and limited on the roller assembly, which drives the PCB carrier board 2 in a direction perpendicular to the tilting direction of the PCB carrier board. The spraying device includes a plurality of nozzles 11 distributed on the upper and lower sides of the PCB carrier board 2, the nozzles 11 being tilted and perpendicular to the surface of the PCB carrier board 2. By utilizing the lateral tilt of the PCB carrier board 2, combined with the structural design of the nozzles 11 tilted towards the surface of the PCB carrier board 2, the chemical solution sprayed onto the PCB carrier board 2 reacts and then quickly slides off the side under gravity, thus avoiding the formation of pools on the PCB surface. Simultaneously, the synchronous tilting structure of the nozzles 11 ensures that the chemical solution (etching solution) is evenly sprayed onto the PCB surface.

[0022] The roller assembly includes a wheel 1, a wheel rubber ring 4, and a shaft core 5. The shaft core 5 includes an upper shaft core and a lower shaft core, and multiple shaft cores 5 are spaced apart, such as... Figure 4As shown, the PCB carrier board 2 is located between the upper and lower shaft cores. A wheel 1 is mounted on the shaft core 5 and contacts the surface of the PCB carrier board 2 via a wheel rubber ring 4. When the wheel 1 rotates, the PCB carrier board 2 moves via the wheel rubber ring 4. Multiple shaft cores 5 are spaced apart. Etching liquid sprayed from the nozzle 11 falls onto the PCB carrier board 2 through the gaps between the shaft cores 5. When the wheel 1 rotates, it rolls on the surface of the PCB carrier board 2 via the wheel rubber ring 4, thereby causing the PCB carrier board 2 to slide within the limited area between the upper and lower shaft cores through friction.

[0023] The wheel rubber ring 4 is specifically ring-shaped and sleeved on the outermost ring of the wheel 1. The wheel 1 contacts the surface of the PCB carrier board 2 through the outer ring of the wheel rubber ring 4. When the wheel 1 rotates, it will cause the wheel rubber ring 4 to roll and rub against the surface of the PCB carrier board 2, thereby driving the PCB carrier board 2 to move.

[0024] In this embodiment, the shaft core 5 is tilted, and its two ends are at different heights; the PCB carrier board 2 is also tilted under the limitation of the shaft core 5; specifically, the end of the shaft core 5 is mounted on the PEEK (Polyether Ether Ketone) bearing 10 to be fixed by the PEEK bearing 10.

[0025] Specifically, each shaft core 5 is equipped with three wheel pieces 1, and the wheel pieces 1 are positioned in designated areas of the PCB carrier board 2, which correspond to the invalid areas of the PCB board. That is, in this embodiment, through the three-point support on the shaft core 5, the three support points (wheel piece rubber rings 4) on the shaft core 5 only contact the invalid areas of the PCB board, thereby solving the problem that the circuit board is easily damaged during the transmission process. In particular, during development, the pressure of the rollers can damage the developing film of the circuit board, leading to developing defects and causing circuit board open circuits or open circuits.

[0026] Through the three-point transmission of wheel 1, during the transmission process, the rubber ring 4 of the wheel contacts the PCB carrier 2, and the limiting bearing 3 limits the downward sliding tendency of the PCB carrier 2 due to gravity, without contacting the upper and lower effective areas of the PCB carrier 2 circuitry; the PEEK bearing 10 limits the downward sliding tendency of the shaft core 5 due to gravity. This solves the problem of the "pool" on the board surface and effectively achieves the purpose of non-contact rolling of the PCB carrier (serial number 2).

[0027] The spray device in this embodiment also includes a pump 6, a filter 7, and a ball valve 9. The pump 6 is sequentially connected to the filter 7, the ball valve 9, and the nozzle 11 via pipelines. Specifically, etching solution is stored in the tank 12. The pump 6 pumps the etching solution from the tank 12 and outputs it. After being pumped into the filter 7, the etching solution is transferred to the ball valve 9 and then output to the nozzle 11 for spraying onto the PCB board surface. A pressure gauge 8 is installed in the pipeline between the ball valve 9 and the nozzle 11.

[0028] Preferably, it further includes a power component that is drively connected to the roller assembly for driving the roller assembly.

[0029] In summary, the tilted non-contact conveying mechanism of this utility model mainly consists of a tilted PCB carrier, a roller assembly, and a spraying device. The PCB carrier is limited by upper and lower shafts distributed vertically. The ends of the shafts are fixed with PEEK bearings, and the surfaces are fitted with wheels equipped with rubber rings. Friction transmission causes the PCB to move along a horizontal path perpendicular to the tilt direction. The wheels are arranged in ineffective areas of the PCB, with three wheels per shaft to reduce contact damage. The spraying system includes upper and lower nozzle assemblies tilted vertically to the PCB surface. A circulation pipeline is formed by a pump, filter, and ball valve, and a pressure gauge is provided for real-time monitoring. The mechanism, combined with a power component, drives the rollers to achieve continuous conveying. Its tilted design effectively solves the "pool" effect on the PCB surface through gravity; it also assists in non-contact transmission and optimizes the uniformity of spray coverage. It is particularly suitable for cleaning or surface treatment stages in PCB manufacturing, effectively avoiding the scratch and contamination problems caused by traditional contact conveying.

[0030] 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 tilting non-contact conveying mechanism, characterized in that, The device includes a PCB carrier board, a roller assembly, and a spraying device. The PCB carrier board is tilted and limited on the roller assembly. The roller assembly drives the PCB carrier board in a direction perpendicular to the tilt direction of the PCB carrier board. The spraying device includes a plurality of nozzles distributed on the upper and lower sides of the PCB carrier board. The nozzles are tilted and perpendicular to the surface of the PCB carrier board.

2. The tilting non-contact conveying mechanism according to claim 1, characterized in that, The roller assembly includes a wheel, a wheel rubber ring, and a shaft. The shaft includes an upper shaft and a lower shaft, and multiple shafts are spaced apart. The PCB carrier is located between the upper shaft and the lower shaft. The wheel is mounted on the shaft and contacts the surface of the PCB carrier through the wheel rubber ring. When the wheel rotates, the PCB carrier is moved by the transmission of the wheel rubber ring.

3. The tilting non-contact conveying mechanism according to claim 2, characterized in that, The end of the shaft is mounted on a PEEK bearing for positioning and fixation by the PEEK bearing.

4. The tilting non-contact conveying mechanism according to claim 2, characterized in that, Each of the aforementioned shaft cores is equipped with three of the aforementioned wheel pieces, and the wheel pieces are positioned in a designated area of ​​the PCB carrier board, the designated area corresponding to an invalid area of ​​the PCB board.

5. The tilting non-contact conveying mechanism according to claim 1, characterized in that, The spraying device also includes a pump, a filter, and a ball valve, with the pump connected in pipeline to the filter, the ball valve, and the nozzle in sequence.

6. The tilting non-contact conveying mechanism according to claim 5, characterized in that, A pressure gauge is installed in the pipeline between the ball valve and the nozzle.

7. The tilting non-contact conveying mechanism according to any one of claims 1 to 6, characterized in that, It also includes a power assembly that is drively connected to the roller assembly for driving the roller assembly.

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