PCB (printed circuit board) degumming circulating filtering device
By designing a PCB degumming circulation filtration device and using interconnecting pipelines to achieve liquid medicine circulation filtration, the problems of increased liquid medicine viscosity and frequent clogging of the filtration device were solved, thereby improving the degumming effect and production efficiency.
Patent Information
- Application Number
- CN202422357529.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-09-26
AI Technical Summary
Existing PCB degumming tanks lack an effective filtration system, which causes the viscosity of the solution to increase and debris to clog the holes, affecting the degumming effect and efficiency. Frequent maintenance of the filtration device requires downtime, affecting production line capacity.
A PCB degumming circulation and filtration device is designed, which includes at least two degumming units. Each unit has a degumming chamber, a first filter and a second filter. The chemical solution is circulated and filtered through a connecting pipeline, and maintenance is performed alternately to ensure production continuity.
Realize the reuse of chemicals, reduce consumption, improve the degumming effect and efficiency, avoid downtime for maintenance, and improve production efficiency.
Smart Images
Figure CN223366428U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit board production, in particular to a PCB glue removal circulation filtering device. Background Art
[0002] During the PCB production process, drilling is required, and drilling will generate high friction heat. When its temperature exceeds the Tg of the resin, the resin will soften or even become fluid and coat the hole wall with the rotation of the drill bit. After cooling, fixed glue residue is formed (that is, glue residue produced by high temperature burning during drilling), which creates a barrier between the inner copper hole ring and the copper hole wall made later, thereby affecting the connection between the circuits of each layer. Therefore, after the drilling of the circuit board is completed, the circuit board needs to be de-glueed to remove the residual glue residue in the hole to ensure the normal use of the circuit board.
[0003] The traditional degumming process tank does not have a filtration system. It only uses a pressure pump to transport the solution to the degumming tank in the degumming section. The circuit board is immersed in the solution in the degumming tank for degumming. The by-products generated in the degumming process precipitate to form glue residue sludge. At the same time, while removing the glue residue, the solution also removes a small part of the resin on the circuit board, resulting in more debris in the solution in the degumming tank, which increases the viscosity of the solution. The glue residue sludge and debris will in turn clog the holes on the circuit board, reducing the through-hole ability of the solution, thereby reducing the degumming effect and degumming efficiency. Therefore, some existing degumming tanks are equipped with a filtering device to help remove the degumming by-products in the solution. However, the filter element of the filtering device is very easy to clog, and the filtering device needs to be maintained frequently. Since the filtering work cannot be performed normally during maintenance, the entire production line needs to be shut down for waiting. Frequent maintenance work cannot make the production line continue to produce for a long time, which seriously affects the production capacity and production efficiency of the production line. Utility Model Content
[0004] In view of this, in order to solve at least one of the problems existing in the above-mentioned prior art, the utility model provides a PCB glue removal circulation filtering device.
[0005] The purpose of this utility model is achieved through the following technical solutions:
[0006] A PCB degumming circulation and filtration device comprises at least two degumming units, wherein the degumming unit comprises a degumming chamber, a first filter and a second filter, wherein the first filter and the second filter are connected, the degumming chamber and the first filter are connected via a feed pipe, and the second filter and the degumming chamber are connected via a discharge pipe. Each of the degumming units is connected to another degumming unit via a connecting pipe, and both ends of the connecting pipe are respectively connected to the discharge pipes of the two degumming units, and a connecting valve is provided on the connecting pipe.
[0007] In the above technical solution, a degumming circulation filtration device suitable for PCB is provided, which is arranged in the degumming section of the PCB production line and is used for degumming the PCB. It includes at least two degumming units, each of which is provided with a degumming chamber. The degumming chamber is used to hold the degumming solution. The PCB board is immersed in the solution for degumming. When degumming is performed, the solution in the degumming chamber enters the first filter through the feed pipe, is filtered by the first filter, and then enters the second filter for filtration, and then returns to the degumming chamber through the discharge pipe, forming a circulation filtration, so that the solution can be reused, reducing the consumption and waste of the solution. The first filter performs coarse filtration on the solution, and the second filter performs fine filtration on the solution. The coarse and fine secondary filtration can effectively remove Various glue residues and sludge in the solution are removed to obtain cleaner solution, which improves the problem of debris clogging the holes during the degumming process. In addition, each degumming unit is maintained alternately, and the maintenance work mainly involves cleaning and maintenance of the first filter and the second filter (such as cleaning or replacing the filter element). Taking two adjacent degumming units as an example, when no maintenance is performed, the connecting valve on the connecting pipeline is in a closed state. When one of the degumming units needs to be maintained, the connecting valve on the connecting pipeline is opened. At this time, a part of the solution that has been filtered in the other degumming chamber can be introduced through the connecting pipeline, so that the degumming chamber whose filter is in maintenance can still perform degumming work normally, without stopping the production line for maintenance work, thus avoiding affecting the production capacity of the production line and improving production efficiency.
[0008] Optionally, in a possible implementation, a linking pipeline is provided between the first filter and the second filter, and the first filter is connected to the second filter through the linking pipeline.
[0009] In the above technical solution, one end of the linking pipeline is connected to the outlet of the first filter, and the other end is connected to the inlet of the second filter. The medicine coarsely filtered by the first filter enters the second filter through the linking pipeline.
[0010] Optionally, in a possible implementation, the filtering accuracy of the first filter is greater than that of the second filter.
[0011] In the above technical solution, the first filter has a higher filtration accuracy and can block particles with larger particle sizes from passing through, and is used for coarse filtration of the medicine. The second filter has a lower filtration accuracy and can block particles with smaller particle sizes, and is used for fine filtration of the medicine. After coarse and fine filtration, a cleaner medicine can be obtained, which improves the phenomenon of pore clogging by debris and enhances the degumming effect and efficiency.
[0012] Optionally, in a possible implementation, a pressure pump is installed on the feed pipeline.
[0013] In the above technical solution, the pressure pump is used to provide power to make the medicine flow.
[0014] Optionally, in a possible implementation, a control valve is provided on the discharge pipeline, and the control valve is located at the front section where the discharge pipeline is connected to the communication pipeline.
[0015] In the above technical solution, the control valve is provided on the discharge pipeline and is located at the front section of the connection with the connecting pipeline. When performing maintenance, the connecting valve is opened and the control valve in the degumming unit being maintained is closed at the same time to ensure that the medicine enters the degumming chamber through the discharge pipeline to prevent the medicine from flowing back into the second filter.
[0016] Optionally, in a possible implementation, a plurality of branch pipelines are provided on the discharge pipeline, and the branch pipelines are all connected to the degumming chamber.
[0017] In the above technical solution, the medicine after filtration is dispersed into the degumming chamber through multiple diversion pipes. Entering through multiple diversion pipes can increase the fluidity of the medicine in the degumming chamber and enhance the perforation ability of the medicine, thereby improving the degumming effect and efficiency.
[0018] Compared with the prior art, this application has the following beneficial effects:
[0019] The present application realizes the circulation filtration and practical use of the degumming solution by sequentially arranging and connecting the degumming chamber, the first filter and the second filter, thereby reducing the consumption and waste of the solution, and performing coarse and fine filtration on the solution through the first filter and the second filter, effectively removing various glue residues and sludge in the solution, improving the problem of debris clogging the holes during the degumming process, and improving the degumming effect; in addition, a connecting pipeline is provided between adjacent degumming units, and the connecting pipeline can be used to realize the maintenance work of each degumming unit without affecting the normal progress of the degumming work, without the need to frequently shut down the production line, avoiding affecting the production capacity of the production line, and effectively improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.
[0021] Figure 1 A three-dimensional diagram of a PCB degumming circulation and filtering device according to one embodiment.
[0022] Figure 2 for Figure 1Left view of the PCB degumming circulation and filtration device.
[0023] Description of reference numerals in the figures:
[0024] 1-Glue removal chamber; 2-First filter; 3-Second filter; 4-Feed pipeline; 41-Pressure pump; 5-Discharge pipeline; 51-Control valve; 52-Diversion pipeline; 6-Connecting pipeline; 7-Connecting pipeline; 71-Connecting valve. DETAILED DESCRIPTION
[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.
[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings. Example 1
[0028] Please refer to Figure 1 In a preferred embodiment of the present application, a degumming circulation and filtration device suitable for PCB is provided, which is arranged in the degumming section of the PCB production line and is used for degumming the PCB. It includes two degumming units, each degumming unit includes a degumming chamber 1, a first filter 2 and a second filter 3, the first filter 2 and the second filter 3 are connected, the degumming chamber 1 and the first filter 2 are connected through a feed pipe 4, the second filter 3 and the degumming chamber 1 are connected through a discharge pipe 5, and a connecting pipe 7 is provided between the two degumming units. The two ends of the connecting pipe 7 are respectively connected to the discharge pipes 5 of the two degumming units, and a connecting valve 71 with a controllable switch is provided on the connecting pipe 7.
[0029] In this embodiment, two degumming units are arranged adjacent to each other, and each degumming unit is provided with a degumming chamber 1, which is used to hold the degumming solution. The PCB board is immersed in the solution for degumming. When the degumming work is carried out, the solution in the degumming chamber 1 enters the first filter 2 through the feed pipe 4, is filtered by the first filter 2, and then enters the second filter 3 for filtration, and then returns to the degumming chamber 1 through the discharge pipe 5, forming a circulating filtration, so that the solution can be reused, reducing the consumption and waste of the solution. Among them, the first filter 2 performs coarse filtration on the solution, and the second filter 3 performs fine filtration on the solution. The coarse and fine secondary filtration can effectively remove various glue residues, sludge and by-products in the solution, obtain cleaner solution, and improve the problem of debris clogging the holes during the degumming process; in addition, each degumming unit performs maintenance work alternately. Specifically, the maintenance work is cleaning and maintenance of the first filter 2 and the second filter 3 (such as cleaning or replacing the filter element), such as Figure 1 As shown, when no maintenance is performed, the connecting valve 71 on the connecting pipe 7 is in a closed state. When maintenance is required on the first filter 2 and the second filter 3 on the left, the connecting valve 71 on the connecting pipe 7 is opened. At this time, a part of the liquid medicine that has completed filtration in the degumming chamber on the right can be introduced into the degumming chamber 1 on the left through the connecting pipe 7, so that the degumming chamber 1 on the left can still perform the degumming work normally. The same is true when the degumming unit on the right is maintained. Through the above method, there is no need to shut down the production line to wait for the maintenance work to be completed, thereby avoiding affecting the production capacity of the production line and improving production efficiency.
[0030] Furthermore, in this embodiment, a connecting pipe 6 is provided between the first filter 2 and the second filter, one end of the connecting pipe 6 is connected to the outlet of the first filter 2, and the other end is connected to the inlet of the second filter 3. The medicine coarsely filtered by the first filter 2 enters the second filter 3 through the connecting pipe 6.
[0031] Furthermore, in this embodiment, the filtration accuracy of the first filter 2 is greater than that of the second filter 3. The filtration accuracy of the first filter 2 is greater, and it can block the passage of particles with larger particle sizes, and is used for coarse filtration of the medicine. The filtration accuracy of the second filter 3 is smaller, and it can block the passage of particles with smaller particle sizes, and is used for fine filtration of the medicine. After coarse and fine filtration, cleaner medicine can be obtained, the phenomenon of pore clogging by debris can be improved, and the glue removal effect and efficiency can be improved.
[0032] Preferably, a high-temperature resistant polymer polypropylene filter bag is installed in the first filter 2, and the filter bag density specification is 15μm±5μm. A high-temperature resistant polymer polypropylene filter core is installed in the second filter 3, and the filter core density specification is 5-8μm.
[0033] Furthermore, in this embodiment, a pressure pump 41 is installed on the feed pipeline 4, and the pressure pump 41 is used to provide power to guide the liquid medicine from the degumming chamber 1 into the first filter 2, and provide driving force for the subsequent movement of the liquid medicine.
[0034] Furthermore, in this embodiment, a control valve 51 is provided on the discharge pipeline 5, and the control valve 51 is located at the front section of the connection between the discharge pipeline 5 and the connecting pipeline 7. Specifically, when maintaining the left-side degumming unit, the connecting valve 71 is opened and the control valve 51 in the left-side degumming unit is closed. At this time, part of the filtered medicine on the right side enters the right-side degumming chamber 1 through the right-side discharge pipeline 5, and the other part enters the left-side degumming chamber 1 through the connecting pipeline 7 and the left-side discharge pipeline 5. By setting the control valve 51, it is ensured that the medicine enters the degumming chamber 1 correctly.
[0035] It should be noted that some types of filters have built-in switch valves, and such filters can be selected as the second filter 3 to achieve the above-mentioned technical effects.
[0036] Furthermore, in this embodiment, a plurality of branch pipes 52 are provided on the discharge pipe 5, and the branch pipes 52 are all connected to the degumming chamber 1. The medicine after filtration is dispersed into the degumming chamber 1 through the plurality of branch pipes 52. Entering through the plurality of branch pipes 52 can increase the fluidity of the medicine in the degumming chamber 1 and enhance the perforation ability of the medicine, thereby improving the degumming effect and degumming efficiency. Example 2
[0037] Please refer to Figure 2 In the non-limiting embodiment of the present embodiment, the structure and principle of the present embodiment are basically the same as those of the embodiment 1. The difference is that, in the present embodiment, three glue removal units are provided, among which a connecting pipe 7 is provided between the left glue removal unit and the middle glue removal unit, and a connecting pipe 7 is also provided between the middle glue removal unit and the right glue removal unit. A connecting valve 71 is provided on both connecting pipes 7; specifically, when performing maintenance work on the middle glue removal unit, the connecting valve 71 of the right connecting pipe 7 can be opened to introduce the filtered medicine in the right glue removal unit, or the connecting valve 71 of the left connecting pipe 7 can be opened to introduce the filtered medicine in the left glue removal unit. Both can produce the same technical effect, and can be selected according to actual needs.
[0038] It should be noted that in some embodiments, when there are 4 or more glue removal units, the glue removal units can be grouped into two, and each group of glue removal units can be provided with a connecting pipe 7, or connecting pipes 7 can be provided for adjacent glue removal units in turn. It is only necessary to ensure that each glue removal unit is connected to at least one glue removal unit through the connecting pipe 7. The specific setting can be flexibly made according to actual needs.
[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
[0040] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.
[0042] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
Claims
1. A PCB degumming circulation and filtering device, characterized in that: It includes at least two glue removal units, and the glue removal unit includes a glue removal chamber, a first filter and a second filter. The first filter and the second filter are connected. The glue removal chamber and the first filter are connected through a feed pipeline. The second filter and the glue removal chamber are connected through a discharge pipeline. Each of the glue removal units is connected to another glue removal unit through a connecting pipeline. The two ends of the connecting pipeline are respectively connected to the discharge pipelines of the two glue removal units. A connecting valve is provided on the connecting pipeline.
2. The PCB degumming circulation and filtering device according to claim 1, characterized in that: A linking pipeline is provided between the first filter and the second filter, and the first filter is connected to the second filter through the linking pipeline.
3. The PCB degumming circulation and filtering device according to claim 1, characterized in that: The filtering accuracy of the first filter is greater than that of the second filter.
4. The PCB degumming circulation and filtering device according to claim 1, characterized in that: A pressure pump is installed on the feed pipeline.
5. The PCB glue removal circulation filtering device according to claim 1, characterized in that: A control valve is provided on the discharge pipeline, and the control valve is located at the front section of the connection between the discharge pipeline and the communication pipeline.
6. The PCB degumming circulation and filtering device according to claim 1, characterized in that: The discharge pipeline is provided with a plurality of branch pipelines, and the branch pipelines are all connected to the degumming chamber.