Circuit board tin spraying post-processing device

Abstract

The utility model relates to the technical field of tin-spraying post-processing devices, in particular to a circuit board tin-spraying post-processing device which comprises a shell, a conveying assembly and filtering assemblies, the conveying assembly is rotatably installed in the shell, the filtering assemblies are arranged in the shell in a penetrating mode, and a plurality of blowing-off assemblies are fixedly arranged on the edge of the top of the shell. The conveying assembly comprises a conveying belt and a gear motor, the conveying belt is rotatably installed in the shell, the gear motor is fixedly arranged on the outer wall of the shell, and the conveying belt is in driving connection with the gear motor; a plurality of cleaning grooves are formed in the top of the shell, the circuit board is continuously cleaned through the multi-stage cleaning grooves, the multiple steps of pre-cleaning, main cleaning, post-cleaning and the like are achieved, the cleaning effect is improved, each cleaning groove is provided with a filtering assembly for continuous filtering, the cleaning pressure of the follow-up cleaning grooves can be sequentially reduced, and the cleaning efficiency is improved. And the subsequent cleaning tank is kept higher in cleanliness, the cleaning quality of the circuit board is guaranteed, and the service life of the cleaning liquid is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of post-soldering treatment devices, specifically a post-soldering treatment device for circuit boards. Background Technology

[0002] The post-tin plating process for circuit boards includes cleaning, inspection, reflow soldering (if necessary), coating with a protective layer, and packaging and storage. These processes ensure that the tin layer is uniform and defect-free, and improve the corrosion resistance and insulation performance of the circuit board, ultimately protecting the integrity of the circuit board during transportation and storage. Each step is adjusted according to the design and production standards of the circuit board to ensure product quality.

[0003] The post-processing steps for PCB solder plating are numerous, among which cleaning is crucial. It effectively removes flux residue, prevents corrosion and electrical faults, improves the reliability and appearance quality of the PCB, and prepares it for subsequent processes. However, it still has certain problems: 1) Over time, contaminants accumulate in the cleaning solution, which may require frequent replacement of the cleaning solution, increasing costs and maintenance workload; 2) Contaminants in the cleaning solution can contaminate the cleaned PCB, thus affecting the cleaning quality. Therefore, in view of the above situation, there is an urgent need to develop a PCB solder plating post-processing device to overcome the shortcomings in current practical applications and meet current needs. Summary of the Invention

[0004] The purpose of this invention is to provide a post-soldering treatment device for circuit boards to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a circuit board tin plating post-processing device, comprising a housing, a conveying assembly and a filtering assembly, wherein the conveying assembly is rotatably installed inside the housing, multiple sets of filtering assemblies are inserted inside the housing, and multiple sets of blowing assemblies are fixedly provided on the top edge of the housing.

[0006] The conveying assembly includes a conveyor belt and a geared motor. The conveyor belt is rotatably mounted inside the housing, and the geared motor is fixed to the outer wall of the housing. The conveyor belt is driven by the geared motor.

[0007] The top of the housing has multiple cleaning slots, and the inside of the housing has multiple mounting slots for installing filter components.

[0008] The filter assembly includes a bottom chamber, a drain pipe, a circulation pump, and a return pipe. The bottom chamber is fixed in the mounting groove, the circulation pump is installed in the bottom chamber, the inlet of the drain pipe is connected to and fixed in the cleaning tank, the bottom end of the return pipe is connected to and fixed in the drain outlet of the circulation pump, and the top end of the return pipe is connected to and fixed in the cleaning tank.

[0009] Preferably, the cleaning tank, the filter assembly, and the blowing assembly are all provided in three sets. Specifically, the filter assembly circulates and filters the cleaning liquid in the cleaning tank to prevent the cleaning liquid from becoming turbid and affecting the subsequent circuit board cleaning quality. The blowing assembly can blow away the cleaning liquid and impurities attached to the conveyor belt and the circuit board on it after the conveyor belt leaves the cleaning tank, so as to avoid contaminating the cleaning liquid in the next cleaning tank.

[0010] Preferably, a filter tank is detachably installed in the bottom compartment. Specifically, the filter tank has perforated holes and is filled with filter cotton material for filtering impurities.

[0011] Preferably, the blowing assembly includes a universal air pipe and a baffle. Both the universal air pipe and the baffle are fixed to the top edge of the housing, and the universal air pipe and the baffle are distributed opposite to each other. Specifically, the universal air pipe is used to blow away impurities and cleaning fluid from the conveyor belt and circuit board coming out of the cleaning tank. The baffle can prevent impurities and cleaning fluid from splashing. The universal air pipe can be freely adjusted in angle to blow impurities and cleaning fluid toward the next cleaning tank.

[0012] Preferably, a bottom suction pipe and a surface suction pipe are installed at the top of the drain pipe. The inlet of the bottom suction pipe is connected to the bottom edge of the cleaning tank, and the outlet of the bottom suction pipe is connected to the drain pipe. The outlet height of the bottom suction pipe is 10-30mm lower than the liquid level in the cleaning tank. The axial height of the surface suction pipe is the same as the liquid level. Specifically, when the liquid level in the cleaning tank is higher than the outlet of the bottom suction pipe, the cleaning liquid will overflow through the bottom suction pipe. At this time, the cleaning liquid at the bottom of the cleaning tank is discharged first, while the cleaning liquid on the surface of the cleaning tank is discharged through the surface suction pipe, which can discharge impurities with maximum efficiency.

[0013] Compared with the prior art, the present invention provides a circuit board tin plating post-processing device, which has the following beneficial effects:

[0014] It employs multi-stage cleaning tanks for continuous cleaning of circuit boards, incorporating pre-cleaning, main cleaning, and post-cleaning steps to improve cleaning effectiveness. Each cleaning tank is equipped with a filter assembly for continuous filtration, which sequentially reduces the cleaning pressure of subsequent tanks, maintaining a higher level of cleanliness and ensuring the quality of circuit board cleaning. This extends the service life of the cleaning solution. When the cleaning solution in the leftmost tank becomes unusable, it is removed, and the cleaning solution in the rightmost tank is moved to the left. Finally, new cleaning solution is added to the rightmost tank. Each maintenance only requires replacing the cleaning solution in one tank, reducing operating costs. Maintenance is simple and quick, requiring only the replacement of the filter cotton in the filter tank. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0017] Figure 2 This is one of the side longitudinal sectional views of the housing of this utility model;

[0018] Figure 3 This is the second longitudinal sectional view of the casing of this utility model;

[0019] Figure 4 This utility model Figure 3 Enlarged schematic diagram of part A.

[0020] In the diagram: 10, housing; 101, cleaning tank; 102, mounting slot; 20, conveying assembly; 201, conveyor belt; 202, geared motor; 30, blowing assembly; 301, universal air pipe; 302, baffle; 40, filter assembly; 401, bottom compartment; 402, drain pipe; 4021, bottom suction pipe; 4022, surface suction pipe; 403, filter tank; 404, circulation pump; 405, return pipe. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0023] Please see Figures 1-4This utility model provides a technical solution: a circuit board tin plating post-processing device, including a housing 10, a conveying component 20 and a filtering component 40. The conveying component 20 is rotatably installed inside the housing 10, and multiple sets of filtering components 40 are inserted inside the housing 10. Multiple sets of blowing components 30 are fixed on the top edge of the housing 10.

[0024] The conveying assembly 20 includes a conveyor belt 201 and a geared motor 202. The conveyor belt 201 is rotatably mounted inside the housing 10, and the geared motor 202 is fixed to the outer wall of the housing 10. The conveyor belt 201 is driven by the geared motor 202.

[0025] The top of the housing 10 is provided with multiple cleaning grooves 101, and the inside of the housing 10 is provided with multiple mounting grooves 102 for mounting the filter assembly 40.

[0026] The filter assembly 40 includes a bottom chamber 401, a drain pipe 402, a circulation pump 404, and a return pipe 405. The bottom chamber 401 is fixed in the mounting groove 102. The circulation pump 404 is installed in the bottom chamber 401. The inlet of the drain pipe 402 is connected to and fixed in the cleaning tank 101. The bottom end of the return pipe 405 is connected to and fixed in the drain outlet of the circulation pump 404. The top end of the return pipe 405 is connected to and fixed in the cleaning tank 101.

[0027] Preferably, the cleaning tank 101, the filter assembly 40, and the blow-off assembly 30 are all provided in three sets. Specifically, the filter assembly 40 circulates and filters the cleaning liquid in the cleaning tank 101 to prevent the cleaning liquid from becoming turbid and affecting the subsequent circuit board cleaning quality. The blow-off assembly 30 can blow off the cleaning liquid and impurities attached to the conveyor belt 201 and the circuit board on it after the conveyor belt 201 leaves the cleaning tank 101, so as to avoid contaminating the cleaning liquid in the next cleaning tank 101.

[0028] Preferably, a filter tank 403 is detachably installed in the bottom compartment 401. Specifically, the filter tank 403 has hollow holes and is filled with filter cotton material for filtering impurities.

[0029] Preferably, the blowing assembly 30 includes a universal air pipe 301 and a baffle 302. Both the universal air pipe 301 and the baffle 302 are fixed to the top edge of the housing 10, and the universal air pipe 301 and the baffle 302 are distributed opposite to each other. Specifically, the universal air pipe 301 is used to blow away impurities and cleaning fluid from the conveyor belt 201 and circuit board coming out of the cleaning tank 101. The baffle 302 can prevent impurities and cleaning fluid from splashing. The universal air pipe 301 can be freely adjusted in angle to blow impurities and cleaning fluid toward the next cleaning tank 101.

[0030] Preferably, the top of the drain pipe 402 is equipped with a bottom suction pipe 4021 and a surface suction pipe 4022 connected thereto. The inlet of the bottom suction pipe 4021 is connected to the bottom edge of the cleaning tank 101, and the outlet of the bottom suction pipe 4021 is connected to the drain pipe 402. The height of the outlet of the bottom suction pipe 4021 is 10-30mm lower than the liquid level in the cleaning tank 101. The axial height of the surface suction pipe 4022 is the same as the liquid level. Specifically, when the liquid level in the cleaning tank 101 is higher than the outlet of the bottom suction pipe 4021, the cleaning liquid will overflow through the bottom suction pipe 4021. At this time, the cleaning liquid at the bottom of the cleaning tank 101 is discharged first, while the cleaning liquid on the surface of the cleaning tank 101 is discharged through the surface suction pipe 4022, which can discharge impurities with maximum efficiency.

[0031] Working principle: The circuit board to be cleaned is placed on the starting section of the conveyor belt 201. The geared motor 202 drives the conveyor belt 201 to rotate, continuously conveying the circuit board to the other end. During this process, the circuit board will pass through three cleaning tanks 101 in sequence. The cleaning tanks 101 are filled with cleaning fluid of a specific depth and are equipped with cleaning equipment (such as ultrasonic cleaners, spray cleaners, etc.). After passing through the three cleaning tanks 101 for cleaning, the cleaned circuit board is output from the rightmost end, realizing continuous cleaning of the circuit board. When the circuit board is driven away from the cleaning tank 101 by the conveyor belt 201, it will pass through the blowing assembly 30. The universal air pipe 301 is connected to high-pressure gas to blow away the impurities and cleaning fluid adhering to the surface of the circuit board. During the cleaning process, the filter assembly 40 continuously cleans the cleaning tanks 101. The cleaning solution in 01 is filtered. The filtered cleaning solution in the bottom tank 401 is transported to the cleaning tank 101 through the circulation pump 404 and the return pipe 405. The cleaning solution in the cleaning tank 101 is then introduced into the drain pipe 402 through the bottom suction pipe 4021 and the surface suction pipe 4022, and then into the filter tank 403 through the drain pipe 402. After being filtered by the filter cotton in the filter tank 403, it falls into the bottom tank below. It should be noted that during the circulation filtration process, the cleaning solution at the bottom of the cleaning tank 101 will be discharged first through the bottom suction pipe 4021, and the cleaning solution on the surface of the cleaning tank 101 will be discharged first through the surface suction pipe 4022. The contaminants that are washed off the circuit board are usually suspended on the surface of the cleaning solution or settled at the bottom of the cleaning tank 101. This filtration method can achieve the best filtration effect under the same flow rate.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A post-treatment apparatus for a circuit board after tin spraying, characterized by: Including shell (10), conveying assembly (20) and filter assembly (40), the conveying assembly (20) rotatable installation is in shell (10), multiple groups of the filter assembly (40) are worn in shell (10), and the top edge of the shell (10) is fixed with multiple groups of blowing assembly (30); The conveying assembly (20) includes a conveyor belt (201) and a reduction motor (202), the conveyor belt (201) is rotatably mounted in the shell (10), and the reduction motor (202) is fixedly arranged on the outer wall of the shell (10), and the conveyor belt (201) is drivingly connected with the reduction motor (202); A plurality of cleaning grooves (101) are formed in the top of the shell (10), and a plurality of mounting grooves (102) for mounting the filter assembly (40) are formed in the interior of the shell (10); The filter assembly (40) includes a bottom bin (401), a sewer pipe (402), a circulating pump (404) and a backflow pipe (405), the bottom bin (401) is fixedly arranged in the mounting groove (102), the circulating pump (404) is mounted in the bottom bin (401), the water inlet of the sewer pipe (402) is communicated with and fixed to the cleaning groove (101), the bottom end of the backflow pipe (405) is communicated with and fixed to the water outlet of the circulating pump (404), and the top end of the backflow pipe (405) is communicated with and fixed to the cleaning groove (101).

2. The apparatus according to claim 1, wherein: The cleaning groove (101), the filter assembly (40) and the blowing assembly (30) are each provided with three groups.

3. The apparatus according to claim 1, wherein: The bottom bin (401) is detachably mounted with a filter groove (403).

4. The apparatus according to claim 1, wherein: The blowing assembly (30) includes a universal air pipe (301) and a baffle (302), the universal air pipe (301) and the baffle (302) are fixedly arranged on the top edge of the shell (10), and the universal air pipe (301) and the baffle (302) are oppositely distributed.

5. The apparatus according to claim 1, wherein: The top end of the sewer pipe (402) is mounted with a bottom suction pipe (4021) and a surface suction pipe (4022) communicated therewith, the water inlet of the bottom suction pipe (4021) is communicated with the bottom edge of the cleaning groove (101), the water outlet of the bottom suction pipe (4021) is communicated with the sewer pipe (402), and the height of the water outlet of the bottom suction pipe (4021) is 10-30mm lower than the liquid level height in the cleaning groove (101), and the axial height of the surface suction pipe (4022) is consistent with the liquid level height.

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