Compensation etching device and vacuum developing, etching and film removing production line

Abstract

The utility model provides a compensation etching device and vacuum developing etching defilming production line, the compensation etching device comprises a frame, a conveying roller group, a spraying assembly, a liquid storage tank and a liquid conveying assembly, the frame is provided with a sealing cavity with an outlet and an inlet, the conveying roller group and the spraying assembly are both arranged in the sealing cavity, and the liquid conveying assembly is arranged in the sealing cavity. The spraying assembly is arranged on the upper side and / or the lower side of the conveying roller set, the liquid conveying assembly is connected between the liquid storage tank and the spraying assembly, the spraying assembly comprises a plurality of spraying pipes and a plurality of control valves, and the control valves correspond to the spraying pipes one to one and can control the corresponding spraying pipes to be connected or disconnected. A plurality of spraying nozzles and a plurality of blind hole nozzles are detachably connected to the spraying pipe, and the mounting positions of the spraying nozzles and the blind hole nozzles are adjustable; a water curtain sealing assembly is arranged at the inlet and / or the outlet of the rack; the vacuum developing, etching and film removing production line comprises a compensation etching device. The device can be compatible with printed circuit boards of different specifications to carry out compensation etching and can avoid chlorine leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of printed circuit board production equipment, in particular to a compensation etching device and a vacuum developing etching and film removal production line. Background Art

[0002] Printed circuit boards are providers of electrical connections for electronic components. Their design is mainly layout design. The main advantage of using printed circuit boards is that they greatly reduce wiring and assembly errors, and improve the level of automation and production labor rate.

[0003] During the production and processing of printed circuit boards, the printed circuit boards after copper plating need to be etched. Due to the unreasonable structural design of the equipment, the etching liquid flows out of the board from the edge area of ​​the circuit board, and the etching liquid accumulates in the central area of ​​the circuit board to form a pool, which is prone to produce a pool effect, hindering spraying and reducing the etching speed, thereby forming a "copper mountain", affecting its etching effect and causing uneven etching on the circuit board.

[0004] In order to improve this problem, a compensating etching device is generally set after the etching device. The existing compensating etching device has a poor spraying effect and cannot completely remove the "copper mountain". In addition, since the spraying range of the compensating etching device is fixed, for printed circuit boards with larger specifications, the spraying may not be in place, and for printed circuit boards with smaller specifications, the spraying may exceed the range, resulting in the problem of wasting etching liquid.

[0005] In addition, the existing compensation etching device generally uses acidic copper chloride etching solution, and chlorine gas is introduced into the sealed chamber during the etching process to oxidize Cu1+ in the etching solution into Cu2+ to maintain the etching ability. However, it is difficult for all the chlorine gas to participate in the reaction, and excess chlorine gas will leak from the inlet or outlet of the sealed chamber, which will pollute the environment. Utility Model Content

[0006] The first purpose of the utility model is to provide a compensating etching device which is compatible with printed circuit boards of different specifications and can avoid chlorine leakage.

[0007] The second purpose of the utility model is to provide a vacuum developing and etching film removal production line including the above-mentioned compensation etching device.

[0008] To achieve the first purpose of the utility model, the utility model provides a compensating etching device, including a frame, a conveying roller group, a spray assembly, a liquid storage tank and an infusion assembly. A sealed cavity is arranged in the frame, and the sealed cavity is respectively provided with an outlet and an inlet on two opposite sides thereof. The conveying roller group and the spray assembly are both arranged in the sealed cavity, and the two ends of the conveying roller group extend toward the inlet and the outlet respectively. The spray assembly is arranged on the upper side and / or the lower side of the conveying roller group, the liquid storage tank is arranged at the lower part of the frame, and the infusion assembly is connected between the liquid storage tank and the spray assembly. The spray assembly includes a plurality of spray pipes and a plurality of control valves, and the plurality of spray pipes are arranged along the conveying direction of the conveying roller group. The control valves are arranged one by one with the spray pipes, and the control valves can control the corresponding spray pipes to be connected or shut off. A plurality of spray nozzles and a plurality of blind hole nozzles are detachably connected to the spray pipe, and the installation positions of the spray nozzles and the blind hole nozzles on the spray pipes are adjustable; a water curtain sealing assembly is arranged at the inlet and / or the outlet of the frame.

[0009] It can be seen from the above scheme that by setting the installation positions of the spray nozzle and the blind hole nozzle on the upper spray pipe to be adjustable, the installation positions of the spray nozzle and the blind hole nozzle can be adjusted according to actual needs, which is conducive to compatibility with printed circuit boards of different specifications for compensatory etching operations; by setting a control valve, the corresponding spray pipe can be controlled to be connected or disconnected, which is conducive to controlling each spray pipe to perform spraying or shutdown, and is conducive to adjusting the spray position according to the position of the "copper mountain" on the printed circuit board, which is conducive to improving the etching effect and ensuring uniform etching of the printed circuit board; by setting a water curtain sealing assembly at the inlet and / or outlet, it is conducive to avoiding leakage of chlorine in the sealing cavity and preventing environmental pollution.

[0010] A further solution is that multiple spray nozzles are connected to the middle of the spray pipe, and multiple blind hole nozzles are arranged at both ends of the spray pipe. Along the conveying direction of the conveying roller group, the number of spray nozzles on the multiple spray pipes gradually increases.

[0011] It can be seen from the above scheme that by gradually increasing the number of spray nozzles on multiple spray pipes, it is convenient to etch the "copper mountain" on the printed circuit board layer by layer and increase the etching range layer by layer, which is beneficial to improve the etching effect and ensure etching uniformity.

[0012] A further solution is that the spray assembly includes an upper spray assembly and a lower spray assembly, the upper spray assembly includes multiple upper spray pipes and multiple upper control valves, and the upper spray pipes are provided with upper spray nozzles and upper blind hole nozzles; the lower spray assembly includes multiple lower spray pipes and multiple lower control valves, the upper spray pipes and the lower spray pipes are staggered in the up and down directions, and the lower spray pipes are provided with lower spray nozzles and lower blind hole nozzles.

[0013] A further solution is that the upper spray pipe is provided with multiple upper mounting holes along its extension direction, and the upper spray nozzle and the upper blind hole nozzle are respectively detachably arranged in the corresponding upper mounting holes; the lower spray pipe is provided with multiple lower mounting holes along its extension direction, and the lower spray nozzle and the lower blind hole nozzle are respectively detachably arranged in the corresponding lower mounting holes.

[0014] A further solution is that, in the up-down direction, the upper spray nozzle and the lower spray nozzle are arranged correspondingly, or the upper spray nozzle and the lower spray nozzle are arranged in a staggered manner.

[0015] A further solution is that a reinforcement strip is provided on the upper spray pipe and / or the lower spray pipe, and the reinforcement strip extends along the extension direction of the upper spray pipe and / or the lower spray pipe.

[0016] It can be seen from the above solution that the provision of the reinforcement strip is beneficial to improving the strength of the upper spray pipe and / or the lower spray pipe.

[0017] A further solution is that a plurality of upper pressure gauges and a plurality of lower pressure gauges are arranged on the frame, the upper pressure gauges are arranged corresponding to the upper spray pipes, and the lower pressure gauges are arranged corresponding to the lower spray pipes.

[0018] A further solution is that the water curtain sealing assembly is arranged above and / or below the conveying roller group, and the water curtain sealing assembly includes a spray head, which can spray a water curtain toward the conveying roller group, and the water curtain can seal the inlet or outlet.

[0019] It can be seen from the above scheme that by setting a water curtain sealing assembly to spray a water curtain to the conveying roller group to seal the inlet or outlet of the sealing cavity, the water curtain can react with the chlorine gas leaked from the sealing cavity, which is beneficial to avoid the discharge of chlorine gas, achieve sealing effect, and ensure the safety of etching operation.

[0020] To achieve the second purpose of the utility model, the utility model provides a vacuum developing, etching and film removing production line, including a loading device, a developing device, a vacuum etching device, a film removing device, an air drying device, a unloading device and the above-mentioned compensating etching device, the loading device, the developing device, the vacuum etching device, the film removing device, the air drying device and the unloading device are arranged in sequence according to the processing order, and the compensating etching device is arranged in front of or behind the vacuum etching device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of an embodiment of the compensating etching device of the utility model.

[0022] Figure 2 It is a side view of an embodiment of the compensating etching device of the utility model.

[0023] Figure 3 It is a structural diagram of the upper spray pipe in the embodiment of the compensating etching device of the utility model.

[0024] Figure 4 It is a structural diagram of the lower spray pipe in the embodiment of the compensating etching device of the utility model.

[0025] Figure 5 It is a structural diagram of a water curtain sealing assembly in an embodiment of the compensating etching device of the utility model.

[0026] Figure 6 It is a schematic diagram of an embodiment of the vacuum developing, etching and film removing production line of the utility model.

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0028] Compensation etching device embodiment:

[0029] See also Figures 1 to 5 The compensating etching device 70 provided by the utility model includes a frame 1, a conveying roller group 2, a spray component 3, a liquid storage tank 18 and an infusion component 4.

[0030] A sealed cavity 11 is provided at the upper part of the frame 1, and an outlet 12 and an inlet 13 are respectively provided at opposite sides of the sealed cavity 11; the conveying roller group 2 and the spray assembly 3 are both arranged in the sealed cavity 11, and the two ends of the conveying roller group 2 extend toward the inlet 13 and the outlet 12 respectively. The spray assembly 3 is arranged on the upper side and / or the lower side of the conveying roller group 2. The liquid storage tank 18 is arranged at the lower part of the frame 1. The infusion assembly 4 is connected between the liquid storage tank 18 and the spray assembly 3, and is used to transport the etching liquid in the liquid storage tank 18 to the spray assembly 3.

[0031] The infusion assembly 4 includes a spray pump 41, a spray main pipe 42, a plurality of upper spray branch pipes 43 and a plurality of lower spray branch pipes 44. The suction end of the spray pump 41 is arranged in the liquid storage tank 18, and the output end of the spray pump 41 is connected to the spray main pipe 42. The spray main pipe 42 is simultaneously connected to the respective first ends of the plurality of upper spray branch pipes 43 and the plurality of lower spray branch pipes 44. The spray assembly 3 includes an upper spray assembly and a lower spray assembly, and the upper spray assembly and the lower spray assembly are respectively arranged on the upper and lower sides of the conveying roller group 2. The second end of the upper spray branch pipe 43 is connected to the upper spray assembly, and the second end of the lower spray branch pipe 44 is connected to the lower spray assembly.

[0032] The upper spray assembly includes eight upper spray pipes 31 and eight upper control valves 32. The eight upper spray pipes 31 are arranged along the conveying direction of the conveying roller group 2. The upper spray pipes 31 extend vertically or obliquely in the horizontal direction. In this embodiment, the horizontal direction is perpendicular to the conveying direction of the conveying roller group 2. The upper control valves 32 are arranged in a one-to-one correspondence with the upper spray pipes 31. Preferably, the upper control valves 32 are connected to the corresponding upper spray branch pipes 43. The upper control valves 32 can independently control the connection or disconnection of the corresponding upper spray pipes 31. The upper control valves 32 are preferably pneumatic valves. A plurality of upper spray nozzles 33 and a plurality of upper blind hole nozzles 34 are detachably provided on the upper spray pipes 31, and the installation positions of the upper spray nozzles 33 and the plurality of upper blind hole nozzles 34 on the upper spray pipes 31 are adjustable.

[0033] The lower spray assembly includes eight lower spray pipes 35 and eight lower control valves 36. The eight lower spray pipes 35 are arranged along the conveying direction of the conveying roller group 2, and the upper spray pipe 31 and the lower spray pipe 35 are staggered in the vertical direction. The lower control valves 36 are arranged one by one with the lower spray pipes 35. Preferably, the lower control valves 36 are connected to the corresponding lower spray branch pipes 43. The lower control valves 36 can independently control the connection or disconnection of the corresponding lower spray pipes 35. The lower control valves 36 are preferably pneumatic valves. A plurality of lower spray nozzles 37 and a plurality of lower blind hole nozzles 38 are detachably arranged on the lower spray pipes 35, and the installation positions of the lower spray nozzles 37 and the lower blind hole nozzles 38 on the lower spray pipes 35 are adjustable.

[0034] Generally, on the spray pipe, multiple spray nozzles are connected to the middle of the spray pipe, and multiple blind hole nozzles are arranged at both ends of the spray pipe. Along the conveying direction of the conveying roller group 2, the number of spray nozzles on the multiple spray pipes gradually increases. Preferably, the increased spray nozzles are respectively arranged on both sides of the middle spray nozzle, so that the multiple spray nozzles are arranged in an isosceles triangle. Of course, the multiple spray nozzles can also be in other shapes or distributed separately.

[0035] When the printed circuit board moves along the conveying direction, the printed circuit board first passes through the spray pipe with a smaller number of spray nozzles, and gradually moves to the spray pipe with a larger number of spray nozzles; generally, the middle part of the "copper mountain" is thickest, and the spray pipe that passes first sprays the etching liquid onto the middle part of the printed circuit board, and etching starts from the middle part of the "copper mountain" to etch the first layer of the "copper mountain". Then, the next spray pipe sprays the etching liquid onto the printed circuit board to etch the second layer of the "copper mountain", and so on, etching layer by layer, and the etching range of the next layer is slightly larger than the etching range of the previous layer, ensuring that the "copper mountain" is completely and evenly etched, which is conducive to improving etching quality.

[0036] Since the positions of the spray nozzle and the blind hole nozzle are adjustable, in actual operation, the position of the spray nozzle can be adaptively adjusted according to the position and thickness of the "copper mountain" on the printed circuit board to ensure that the spray nozzle can spray every corner of the "copper mountain".

[0037] Furthermore, the upper spray pipe 31 is provided with a plurality of upper mounting holes evenly spaced along its extension direction, and the upper spray nozzle 33 and the upper blind hole nozzle 34 are respectively detachably disposed in the corresponding upper mounting holes. The lower spray pipe 35 is provided with a plurality of lower mounting holes evenly spaced along its extension direction, and the lower spray nozzle 37 and the lower blind hole nozzle 38 are respectively detachably disposed in the corresponding lower mounting holes. In the up-down direction, the upper spray nozzle 33 is disposed correspondingly to the lower spray nozzle 37, or the upper spray nozzle 33 and the lower spray nozzle 37 are disposed staggered, and the latter is preferred in this embodiment.

[0038] In order to improve the structural strength of the upper spray pipe 31 and the lower spray pipe 35, a reinforcing strip 39 is provided on the upper spray pipe 31 and the lower spray pipe 35. The reinforcing strip 39 extends along the extension direction of the upper spray pipe 31 or the lower spray pipe 35, and the reinforcing strip 39 is provided on a side facing away from the upper spray nozzle 33 and the lower spray nozzle 37. The reinforcing strip 39 may be a metal strip, and the reinforcing strip 39 is connected to the upper spray pipe 31 and the lower spray pipe 35 by welding, screws, clamping, etc.

[0039] The frame 1 is provided with a plurality of upper pressure gauges 14 and a plurality of lower pressure gauges 15, wherein the upper pressure gauges 14 are provided in one-to-one correspondence with the upper spray pipes 31, and the lower pressure gauges 15 are provided in one-to-one correspondence with the lower spray pipes 35. Preferably, the respective detection ends of the upper pressure gauges 14 and the lower pressure gauges 15 are respectively connected to the corresponding spray branch pipes 43, so as to detect the air pressure in the spray branch pipes 43, so as to facilitate the separate control of the spray pressures of the corresponding upper spray pipes 31 and the lower spray pipes 35.

[0040] Combination Figure 1 and Figure 5 The frame 1 is provided with a water curtain sealing assembly at the inlet 13 and / or the outlet 12 of the sealing chamber 11. This embodiment takes the water curtain sealing assembly being provided at the inlet 13 as an example.

[0041] The water curtain sealing assembly 5 is arranged above and / or below the conveying roller set 2. The water curtain sealing assembly 5 includes a spray head 51 arranged in the sealing chamber 11. The spray head 51 is connected to the water curtain water storage tank (not shown in the figure) through a water pipe. The water curtain sealing assembly 5 can spray a water curtain to the conveying roller set 2. The water curtain can seal the inlet or outlet to prevent gas leakage in the sealing chamber. The water used for the water curtain can be pure water, tap water, etc.

[0042] In this embodiment, the water curtain sprayed by the spray head 51 can react with the chlorine gas leaking from the sealed cavity 11 to prevent the chlorine gas from being discharged out of the sealed cavity 11 and polluting the environment.

[0043] exist Figure 1 In the embodiment, a first water receiving tank 16 is provided below the spray assembly 3, and the first water receiving tank 16 is connected to the liquid storage tank 18 to realize the recycling and reuse of the etching liquid. Of course, a filtering device is generally provided between the first water receiving tank 16 and the liquid storage tank 18, and the etching liquid enters the liquid storage tank 18 after being filtered.

[0044] A second water receiving trough 17 is provided below the water curtain sealing assembly 5, and the second water receiving trough 17 can be connected to the first water receiving trough 16, or the second water receiving trough 17 is connected to the water curtain water storage tank, so as to facilitate the recycling of sealing water.

[0045] Vacuum development and etching film removal production line example:

[0046] See also Figure 6 The vacuum developing, etching and film removing production line provided in this embodiment includes a feeding device 10, a developing device 20, a vacuum etching device 30, a film removing device 40, an air drying device 50, a feeding device 60 and a compensating etching device 70 of the above embodiment. The feeding device 10, the developing device 20, the vacuum etching device 30, the film removing device 40, the air drying device 50 and the feeding device 60 are arranged in sequence according to the processing sequence of the printed circuit board, and the compensating etching device 70 is arranged in front of or behind the vacuum etching device 30. A water washing device 80 is arranged at the rear of the developing device 20, the vacuum etching device 30 and the film removing device 40.

[0047] In summary, it can be seen that the utility model can adjust the installation positions of the spray nozzle and the blind hole nozzle on the upper spray pipe in an adjustable manner, and can adjust the installation positions of the spray nozzle and the blind hole nozzle according to actual needs, which is conducive to compatibility with printed circuit boards of different specifications for compensatory etching operations; by setting a control valve, the corresponding spray pipe can be controlled to be connected or disconnected, which is conducive to controlling each spray pipe to perform spraying or shutting down, and is conducive to adjusting the spray position according to the position of the "copper mountain" on the printed circuit board, which is conducive to improving the etching effect and ensuring uniform etching of the printed circuit board; by setting a water curtain sealing assembly at the inlet and / or outlet, it is conducive to avoiding leakage of chlorine in the sealing cavity and preventing environmental pollution.

[0048] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A compensating etching device, comprising a frame, a conveying roller group, a spray assembly, a liquid storage tank and an infusion assembly, wherein a sealed cavity is arranged in the frame, and an outlet and an infusion assembly are respectively opened on opposite sides of the sealed cavity, the conveying roller group and the spray assembly are both arranged in the sealed cavity, and the two ends of the conveying roller group extend toward the infusion assembly and the outlet, respectively, the spray assembly is arranged on the upper side and / or the lower side of the conveying roller group, the liquid storage tank is arranged at the lower part of the frame, and the infusion assembly is connected between the liquid storage tank and the spray assembly, characterized in that: The spray assembly includes a plurality of spray pipes and a plurality of control valves, wherein the plurality of spray pipes are arranged along the conveying direction of the conveying roller group, the control valves are arranged in one-to-one correspondence with the spray pipes, and the control valves can control the corresponding spray pipes to be connected or disconnected, and the spray pipes are detachably connected with a plurality of spray nozzles and a plurality of blind hole nozzles, and the installation positions of the spray nozzles and the blind hole nozzles on the spray pipes are adjustable; The frame is provided with a water curtain sealing assembly at the inlet and / or the outlet.

2. The compensating etching device according to claim 1, characterized in that: The plurality of spray nozzles are connected to the middle of the spray pipe, and the plurality of blind hole nozzles are arranged at both ends of the spray pipe. Along the conveying direction of the conveying roller group, the number of spray nozzles on the plurality of spray pipes gradually increases.

3. The compensating etching device according to claim 1, characterized in that: The spray assembly comprises an upper spray assembly and a lower spray assembly, the upper spray assembly comprises a plurality of upper spray pipes and a plurality of upper control valves, and the upper spray pipes are provided with an upper spray nozzle and an upper blind hole nozzle; The lower spray assembly comprises a plurality of lower spray pipes and a plurality of lower control valves, and the lower spray pipes are provided with lower spray nozzles and lower blind hole nozzles.

4. The compensating etching device according to claim 3, characterized in that: The upper spray pipe is provided with a plurality of upper mounting holes along its extending direction, and the upper spray nozzle and the upper blind hole nozzle are respectively detachably arranged in the corresponding upper mounting holes; The lower spray pipe is provided with a plurality of lower mounting holes along its extending direction, and the lower spray nozzle and the lower blind hole nozzle are respectively detachably arranged in the corresponding lower mounting holes.

5. The compensating etching device according to claim 3, characterized in that: In the up-down direction, the upper spray nozzle and the lower spray nozzle are arranged correspondingly, or the upper spray nozzle and the lower spray nozzle are arranged in a staggered manner.

6. The compensating etching device according to claim 3, characterized in that: The upper spray pipe and / or the lower spray pipe are provided with reinforcement strips, and the reinforcement strips extend along the extension direction of the upper spray pipe and / or the lower spray pipe.

7. The compensating etching device according to claim 3, characterized in that: The frame is provided with a plurality of upper pressure gauges and a plurality of lower pressure gauges, wherein the upper pressure gauges are provided corresponding to the upper spray pipes, and the lower pressure gauges are provided corresponding to the lower spray pipes.

8. The compensating etching device according to claim 1, characterized in that: The water curtain sealing assembly is arranged above and / or below the conveying roller group. The water curtain sealing assembly includes a spray head. The spray head can spray a water curtain toward the conveying roller group. The water curtain can seal the inlet or the outlet.

9. Vacuum development and etching film removal production line, characterized by: It comprises a loading device, a developing device, a vacuum etching device, a film removing device, an air drying device, a loading device and the compensating etching device according to any one of claims 1 to 8, wherein the loading device, the developing device, the vacuum etching device, the film removing device, the air drying device and the loading device are arranged in sequence according to a processing sequence, and the compensating etching device is arranged at the front side or the rear side of the vacuum etching device.

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