Two-fluid cleaning device for circuit board

By designing a two-fluid cleaning device using gas-water mixing, the problem of difficulty in thoroughly cleaning small particles and impurities on circuit boards in traditional cleaning methods is solved, and high-precision and efficient cleaning effect is achieved, suitable for fine manufacturing of circuit boards .

CN222288096UActive Publication Date: 2025-01-03SUZHOU XUAN MINGSHI SEMICON EQUIP TECH CO LTD
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Patent Information

Application Number
CN202421077862.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-17
Publication Date
2025-01-03
Estimated Expiration
2034-05-17

AI Technical Summary

Technical Problem

The traditional single-stage nozzle cleaning method is prone to water drop effect and pool effect when cleaning circuit boards, making it difficult to thoroughly clean small particles of impurities, especially the poor cleaning effect on the fine parts on the circuit boards, which may lead to impurities residues and conductivity in subsequent processes. Line short circuit.

Method used

Design a circuit board's second fluid cleaning device, adopting fixtures and symmetrically arranged nozzle assembly, nozzle one is an air flow channel pipe, nozzle two is a water flow channel pipe, and the nozzle is equipped with air intake pipe and nozzle, and the air flow is The water flow is mixed and sprayed in a mist, and high-precision cleaning is achieved by vertically moving the nozzle assembly and adjusting the spray distance and pressure.

Benefits of technology

It effectively avoids the residual cleaning liquid and the water tank effect, and refines the cleaning particles, with a particle size of up to 10um, ensuring high accuracy and thorough cleaning of the circuit board, and is suitable for manufacturing and production in fine areas.

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Abstract

The utility model provides a two-fluid cleaning device for a circuit board, which comprises a clamp and two groups of spray pipe components symmetrically arranged by taking the clamp as a center, and the clamp vertically moves between the two spray pipe components through a conveying mechanism; the spray pipe assembly comprises a plurality of first spray pipes and second spray pipes which are evenly distributed in the conveying direction of the clamp, the first spray pipes are arranged on the outer sides of the second spray pipes, and the first spray pipes and the second spray pipes are arranged in a one-to-one correspondence mode. The first spraying pipe is an airflow runner pipe, the second spraying pipe is a water flow runner pipe, a plurality of evenly-distributed nozzles are arranged on the second spraying pipe, a plurality of air inlet pipes corresponding to the nozzles are arranged on the first spraying pipe, and the air inlet pipes are communicated with the corresponding nozzles. Air flow in the first spraying pipe enters the nozzle through the air inlet pipe and is sprayed out in a mist shape from the spraying opening after being mixed with water flow in the nozzle. According to the circuit board cleaning device, a gas-water mixed two-fluid cleaning mechanism is adopted, cleaning particles can be refined, fine positions on a circuit board can be effectively cleaned, and the cleaning effect is good.
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Description

Technical Field

[0001] The utility model relates to the technical field of circuit board manufacturing, in particular to a two-fluid cleaning device for a circuit board. Background Art

[0002] The production of circuit boards usually adopts the process of substrate dry film → exposure → development → etching → film stripping. Among them, water washing process is required after development, etching and film stripping. The circuit board (PCB) water washing process is a key step in the manufacturing process of printed circuit boards. It helps to remove any contaminants or residues left in the manufacturing process. The water washing process ensures that the final product meets the required quality standards and is free of any impurities.

[0003] The traditional water washing process uses a single-stage, one-fluid nozzle to spray cleaning liquid onto the surface of the circuit board for cleaning. The sprayed cleaning liquid easily forms water droplets, causing a water droplet effect, and cannot clean small particle impurities, especially for the fine lines and small line spacing on the circuit board. The cleaning effect is poor and it is difficult to clean thoroughly. In addition, some circuit boards are cleaned horizontally. The cleaning liquid at the bottom of the circuit board flows too fast, and the cleaning liquid at the top is not easy to flow away, which easily leads to a pool effect, poor cleaning effect, and incomplete cleaning. The residual liquid on the circuit board may flow to the surface of the printed circuit board in the subsequent process, and further etch the surface of the printed circuit board, and may even cause a short circuit in the conductive line. Utility Model Content

[0004] The utility model aims to provide a two-fluid cleaning device for a circuit board to overcome the deficiencies in the prior art.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a two-fluid cleaning device for a circuit board, comprising a fixture and two groups of relatively arranged nozzle assemblies, the two groups of the nozzle assemblies are symmetrically arranged with the fixture as the center, the fixture clamps the circuit board, and moves vertically between the two nozzle assemblies through a conveying mechanism; the nozzle assembly comprises a plurality of nozzles one and two uniformly arranged along the conveying direction of the fixture, the nozzle one is arranged on the outside of the nozzle two, and the nozzle one and the nozzle two are arranged one by one; the nozzle one is an air flow channel pipe, and the nozzle two is a water flow channel pipe, which is provided with a plurality of uniformly arranged nozzles, the nozzle one is provided with a plurality of air intake pipes corresponding to the nozzles, the air intake pipes are connected to the corresponding nozzles, the airflow in the nozzle one enters the nozzle through the air intake pipe and mixes with the water flow in the nozzle and is sprayed out from the nozzle in a mist form.

[0006] Furthermore, in the above-mentioned two-fluid cleaning device for the circuit board, the nozzle assembly also includes a nozzle fixing seat 1 and a nozzle fixing seat 2, the nozzle fixing seat 1 and the nozzle fixing seat 2 are arranged in parallel, and the nozzle fixing seat 1 is arranged on the outside of the nozzle fixing seat 2; the nozzle fixing seat 1 is provided with an air inlet at the bottom, and a plurality of the nozzles 1 are fixed on the nozzle fixing seat 1; the nozzle fixing seat 2 is provided with a liquid inlet at the bottom, and a plurality of the nozzles 2 are fixed on the nozzle fixing seat 2.

[0007] Furthermore, in the above-mentioned two-fluid cleaning device for the circuit board, a quick-release joint is provided at the bottom of the first nozzle, and is connected to the flow channel provided inside the first nozzle fixing seat through the quick-release joint; a quick-release joint is also provided at the bottom of the second nozzle, and is connected to the flow channel provided inside the second nozzle fixing seat through the quick-release joint.

[0008] Furthermore, in the above-mentioned two-fluid cleaning device for the circuit board, the nozzle assembly also includes a support plate, and the support plate is provided with a through hole 1 corresponding to the nozzle 1 and a through hole 2 corresponding to the nozzle 2, and the tops of the nozzles 1 and 2 are both provided with plugs, the plug located at the top of the nozzle 1 is inserted in the through hole 1 and extends above the support plate, and the plug located at the top of the nozzle 2 is inserted in the through hole 2 and extends above the support plate.

[0009] Furthermore, in the above-mentioned two-fluid cleaning device for the circuit board, the air inlet pipe includes an air guide pipe and adapter 1 and adapter 2 arranged at both ends of the air guide pipe, the air guide pipe is a hose, adapter 1 is connected to nozzle 1, and adapter 2 is connected to the nozzle; the nozzle is connected to nozzle 2 through an extension pipe, the airflow in nozzle 1 enters the nozzle through the air inlet pipe, and is mixed with the water flow entering the nozzle through the extension pipe at the front end of the nozzle outlet and is sprayed out from the nozzle in a mist form.

[0010] Furthermore, in the above-mentioned two-fluid cleaning device for circuit boards, the nozzles on the adjacent two nozzle pipes are staggered.

[0011] Furthermore, in the above-mentioned two-fluid cleaning device for circuit boards, the spraying distance from the nozzle to the circuit board is 55-75 mm.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: during cleaning, the circuit board passes through the fixture in a vertical state between the two nozzle assemblies, which can avoid cleaning liquid residue and pool effect, and the cleaning effect is good; in addition, the use of a two-fluid cleaning mechanism mixed with air and water can refine the cleaning particles, and the minimum particle size can reach 10um, which can effectively clean the fine parts on the circuit board, ensure clean and thorough cleaning, and realize high-precision, high-requirement, and wide-applicability manufacturing and production of circuit boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 This is a schematic diagram of the structure of the two-fluid cleaning device for circuit boards of the utility model;

[0015] Figure 2 It is a partial structural schematic diagram of the two-fluid cleaning device for circuit boards of the utility model;

[0016] Figure 3 for Figure 2 A top view of

[0017] Figure 4 The schematic diagram of the structure of the nozzle assembly of the two-fluid cleaning device for circuit boards of the utility model Figure 1 ;

[0018] Figure 5 The schematic diagram of the structure of the nozzle assembly of the two-fluid cleaning device for circuit boards of the utility model Figure 2 ;

[0019] Figure 6 It is a schematic diagram of the connection between the nozzle 1 and the nozzle 2 of the two-fluid cleaning device for circuit boards of the utility model;

[0020] In the figure: 1. fixture;

[0021] 2. Nozzle assembly; 21. Nozzle fixing seat 1; 211. Air inlet; 22. Nozzle fixing seat 2; 221. Liquid inlet; 23. Nozzle 1; 24. Nozzle 2; 25. Nozzle; 26. Air inlet pipe; 261. Air guide pipe; 262. Adapter 1; 263. Adapter 2; 27. Support plate; 28. Extension tube; 29. ​​Quick release connector; 210. Plug. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example 1

[0024] like Figure 1-6As shown, a two-fluid cleaning device for a circuit board comprises a fixture 1 and two groups of nozzle assemblies 2 arranged opposite to each other, the two groups of nozzle assemblies 2 are symmetrically arranged with the fixture 1 as the center, the fixture 1 clamps the circuit board and moves vertically between the two nozzle assemblies 2 through a conveying mechanism (not shown in the figure); the nozzle assembly 2 comprises a plurality of nozzles 1 23 and nozzles 2 24 evenly arranged along the conveying direction of the fixture 1, the nozzles 1 23 are arranged outside the nozzles 24, and the nozzles 1 23 and the nozzles 2 24 are arranged one by one; the nozzles 1 23 are air flow channel pipes, the nozzles 2 24 are water flow channel pipes, and a plurality of evenly arranged nozzles 25 are arranged thereon, the nozzles 1 23 are provided with a plurality of air inlet pipes 26 arranged corresponding to the nozzles 25, the air inlet pipes 26 are connected to the corresponding nozzles 25, the air flow in the nozzles 1 23 enters the nozzles 25 through the air inlet pipes 26 and mixes with the water flow in the nozzles 25 and is sprayed out from the nozzles in a mist form. During cleaning, the circuit board passes through the fixture 1 in a vertical state between the two nozzle assemblies, which can avoid cleaning liquid residue and pool effect, and the cleaning effect is good; in addition, the two-fluid cleaning mechanism of air-water mixture can refine the cleaning particles, and the minimum particle size can reach 10um, which can effectively clean the fine parts on the circuit board, ensure clean and thorough cleaning, and realize high-precision, high-requirement, and wide-application manufacturing and production of circuit boards.

[0025] In the above structure, if Figure 1 , 4 As shown, the nozzles 25 on the adjacent nozzles 24 are arranged in a staggered manner; and the spraying distance from the nozzles 25 to the circuit board is 55-75mm. Through this arrangement, it is ensured that the spraying range of the nozzles 25 can completely cover the circuit board, and according to the process requirements, the spraying distance and the spraying pressure of the gas and liquid are adjusted and controlled, and the spraying particle size is controlled to achieve the best cleaning effect.

[0026] Example 2

[0027] Based on the structure of Example 1, Figure 2-5 As shown, the nozzle assembly 2 further includes a nozzle fixing seat 1 21 and a nozzle fixing seat 2 22. The nozzle fixing seat 1 21 and the nozzle fixing seat 2 22 are arranged in parallel, and the nozzle fixing seat 1 21 is arranged outside the nozzle fixing seat 2 22; the nozzle fixing seat 1 21 is provided with an air inlet 211 at the bottom, and a plurality of nozzles 1 23 are fixed on the nozzle fixing seat 1 21; the nozzle fixing seat 2 22 is provided with a liquid inlet 221 at the bottom, and a plurality of nozzles 24 are fixed on the nozzle fixing seat 2 22. The water flow rate, pressure and air intake pressure of one nozzle assembly 2 are controlled by the air inlet 211 and the liquid inlet 221, so as to facilitate control.

[0028] To achieve rapid installation of nozzle 1 23 and nozzle 2 24, Figure 2-5As shown, a quick-release joint 29 is provided at the bottom of the nozzle 1 23, and is connected to the flow channel provided inside the nozzle fixing seat 1 21 through the quick-release joint 29; a quick-release joint 29 is also provided at the bottom of the nozzle 2 24, and is connected to the flow channel provided inside the nozzle fixing seat 2 22 through the quick-release joint 29.

[0029] In order to improve the structural stability of the nozzle assembly 2, as Figure 2-5 As shown, the nozzle assembly 2 further includes a support plate 27, on which a through hole 1 corresponding to the nozzle 1 23 and a through hole 2 corresponding to the nozzle 2 24 are provided, and plugs 210 are provided at the tops of the nozzle 1 23 and the nozzle 2 24. The plugs 210 at the top of the nozzle 1 23 are inserted in the through hole 1 and extend above the support plate 27, and the plugs 210 at the top of the nozzle 2 24 are inserted in the through hole 2 and extend above the support plate 27. During installation, the nozzle assembly 2 is installed on the cleaning device through the nozzle fixing seat 21, the nozzle fixing seat 3 22, and the support plate 27. The support plate 27 plays the role of supporting the nozzle 1 23 and the nozzle 2 24, and has a simple structure and is easy to install.

[0030] In the above structure, if Figure 6 As shown, the air intake pipe 26 includes an air guide pipe 261 and an adapter 1 262 and an adapter 2 263 provided at both ends of the air guide pipe 261. The air guide pipe 261 is a hose, and the adapter 1 262 and the adapter 2 263 are right-angle adapters. The adapter 1 262 is connected to the nozzle 1 23, and the adapter 2 263 is connected to the nozzle 25. The nozzle 25 is connected to the nozzle 2 24 through the extension pipe 28. The airflow in the nozzle 1 23 enters the nozzle 25 through the air intake pipe 26, and is mixed with the water flow entering the nozzle 25 through the extension pipe 28 at the front end of the nozzle of the nozzle 25 and then sprayed out from the nozzle in a mist form. In this embodiment, the axis of the air intake pipe 26 and the axis of the nozzle 25 are on the same horizontal plane, the air intake pipe 26 and the nozzle 25 are arranged one by one, and the air intake pipe 26 has a simple structure and is easy to install.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A two-fluid cleaning device for a circuit board, characterized in that: It includes a fixture and two groups of nozzle assemblies arranged opposite to each other, the two groups of nozzle assemblies are symmetrically arranged with the fixture as the center, the fixture clamps the circuit board and moves vertically between the two nozzle assemblies through a conveying mechanism; the nozzle assembly includes a plurality of nozzles 1 and 2 evenly arranged along the conveying direction of the fixture, the nozzle 1 is arranged on the outside of the nozzle 2, and the nozzle 1 and the nozzle 2 are arranged one by one; the nozzle 1 is an air flow channel pipe, and the nozzle 2 is a water flow channel pipe, which is provided with a plurality of evenly arranged nozzles, the nozzle 1 is provided with a plurality of air inlet pipes arranged corresponding to the nozzles, the air inlet pipes are connected to the corresponding nozzles, the air flow in the nozzle 1 enters the nozzle through the air inlet pipe and mixes with the water flow in the nozzle and is sprayed out from the nozzle in a mist form.

2. The two-fluid cleaning device for a circuit board according to claim 1, characterized in that: The nozzle assembly also includes a nozzle fixing seat 1 and a nozzle fixing seat 2. The nozzle fixing seat 1 and the nozzle fixing seat 2 are arranged in parallel, and the nozzle fixing seat 1 is arranged on the outside of the nozzle fixing seat 2; the nozzle fixing seat 1 is provided with an air inlet at the bottom, and a plurality of nozzles 1 are fixed on the nozzle fixing seat 1; the nozzle fixing seat 2 is provided with a liquid inlet at the bottom, and a plurality of nozzles 2 are fixed on the nozzle fixing seat 2.

3. The two-fluid cleaning device for circuit boards according to claim 2, characterized in that: A quick-release joint is provided at the bottom of the nozzle 1, and is communicated with the flow channel provided inside the nozzle fixing seat 1 through the quick-release joint; a quick-release joint is also provided at the bottom of the nozzle 2, and is communicated with the flow channel provided inside the nozzle fixing seat 2 through the quick-release joint.

4. The two-fluid cleaning device for a circuit board according to claim 2, characterized in that: The nozzle assembly also includes a support plate, on which a through hole 1 is provided corresponding to nozzle 1 and a through hole 2 is provided corresponding to nozzle 2. Plugs are provided on the tops of nozzles 1 and 2. The plug at the top of nozzle 1 is inserted in through hole 1 and extends above the support plate, and the plug at the top of nozzle 2 is inserted in through hole 2 and extends above the support plate.

5. The two-fluid cleaning device for circuit boards according to claim 1, characterized in that: The air intake pipe includes an air guide pipe and adapter 1 and adapter 2 arranged at both ends of the air guide pipe. The air guide pipe is a hose. Adapter 1 is connected to nozzle 1, and adapter 2 is connected to the nozzle. The nozzle is connected to nozzle 2 through an extension pipe. The airflow in nozzle 1 enters the nozzle through the air intake pipe, and is mixed with the water flow entering the nozzle through the extension pipe at the front end of the nozzle outlet and is sprayed out from the nozzle outlet in a mist form.

6. The two-fluid cleaning device for a circuit board according to claim 1, characterized in that: The nozzles on the adjacent second nozzle pipes are arranged in a staggered manner.

7. The two-fluid cleaning device for a circuit board according to claim 1 or 6, characterized in that: The spraying distance from the nozzle to the circuit board is 55-75 mm.