CN216460551U

CN216460551U - PCB surface cleaning equipment used before printing

Info

Publication number: CN216460551U
Application number: CN202122390536.7U
Authority: CN
Inventors: 赵越; 晏海军; 杨行豪; 舒适
Original assignee: Junling Electronics Suzhou Co ltd
Current assignee: Junling Electronics Suzhou Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-05-10
Anticipated expiration: 2031-09-30

Abstract

The utility model provides equipment for cleaning the surface of a PCB (printed Circuit Board) before printing, which is provided with a production line corresponding to the equipment; the equipment comprises a cleaning unit arranged above a production line, a position sensor, a programmable logic controller, an air compressor and a vacuum suction pump; the bottom of the cleaning unit forms a working plane, a strip-shaped air blowing opening is formed in the working plane, and strip-shaped air suction ports are respectively arranged on two sides of the air blowing opening; an air blowing channel and an air suction channel are arranged in the cleaning unit, the upper end of the air blowing channel is communicated with an air inlet, and the upper end of the air suction channel is communicated with an air outlet; the air inlet is communicated with the blowing end of the air compressor, and the exhaust port is communicated with the suction end of the vacuum suction pump; the air compressor and the vacuum suction pump are controlled by a programmable logic controller to be switched on and off; the position sensor is arranged at the upstream position of the production line and is electrically connected with the programmable logic controller. This equipment can carry out self-cleaning to PCB board surface before the printing step of SMT paster production line to effectively prevent secondary pollution.

Description

PCB surface cleaning equipment used before printing

Technical Field

The utility model relates to the technical field of surface assembly, in particular to equipment for cleaning the surface of a PCB (printed circuit board) before printing.

Background

In the process of SMT (surface mount technology) factory patch production, dust or other foreign matters exist on a PCB (printed circuit board) inevitably, so that the situations of steel mesh blocking, missing printing and the like are easily caused in the production process, and the welding defects of element insufficient soldering (particularly the insufficient soldering of BGA elements) and the like are often caused.

At present, before the printing step of SMT paster production line, the equipment that can self-cleaning PCB board still not has, can only clean through the manual work, and the work of manual cleaning PCB board surface is wasted time and energy, and the PCB board after the manual cleaning need be through processes such as transport moreover to cost just can get into the printing step after the longer time, this in-process is easily by secondary pollution, and this quality control who gives the SMT product has brought the difficulty.

Therefore, it is desirable to provide an apparatus capable of automatically cleaning the surface of the PCB board before the printing step of the SMT pick and place line.

Disclosure of Invention

In view of the above problems, the present invention provides an apparatus for cleaning a surface of a PCB before printing.

In order to achieve the purpose, the utility model adopts the technical scheme that: a device for cleaning the surface of a PCB before printing is provided with a production line corresponding to the device; the equipment comprises a cleaning unit arranged above the production line, a position sensor, a programmable logic controller, an air compressor and a vacuum suction pump;

the bottom of the cleaning unit forms a working plane, a strip-shaped air blowing port is formed in the working plane, strip-shaped air suction ports are respectively arranged on two sides of the air blowing port, and the air blowing port and the air suction ports extend along the width direction of the assembly line and are arranged corresponding to the width position of the assembly line;

an air blowing channel and an air suction channel are arranged in the cleaning unit, the upper end of the air blowing channel is communicated with an air inlet, the lower end of the air blowing channel is communicated with the air blowing port, the upper end of the air suction channel is communicated with an air outlet, and the lower end of the air suction channel is communicated with the air suction port; the air inlet is communicated with the blowing end of the air compressor, and the exhaust port is communicated with the suction end of the vacuum suction pump; the air compressor and the vacuum suction pump are both electrically connected with the output end of the programmable logic controller, and the switch is controlled by the programmable logic controller;

the position sensor is arranged at the upstream position on the assembly line relative to the cleaning unit and is electrically connected with the input end of the programmable logic controller.

Preferably, the air conditioner further comprises a pressure regulating filter, and the blowing end of the air compressor is communicated to the air inlet after passing through the pressure regulating filter.

Further, the pressure regulating filter regulates the pressure of the compressed air output by the air compressor to 0.25-0.3 Mpa.

Furthermore, the air compressor also comprises an ion generator, and the air blowing end of the air compressor is communicated with the air inlet finally after passing through the pressure regulating filter and the ion generator in sequence.

Preferably, when the cleaning device works, the distance from the working plane of the cleaning unit to the cleaning surface is 1.5-2.0 mm.

Preferably, the work plane is an inclined plane facing in an upstream direction of the flow line.

Further, the included angle between the working plane and the horizontal plane is 10 degrees.

Preferably, the position sensor is an infrared sensor.

The utility model has the beneficial effects that: the equipment for cleaning the surface of the PCB before printing is arranged in a production line before the PCB printing step, the position sensor is triggered when the PCB passes through, then the position sensor sends a signal to the programmable logic controller, the programmable logic controller starts the air compressor and the vacuum suction pump according to the signal, so that the cleaning unit arranged above the production line blows air downwards through the air blowing port to blow up dust and foreign matters adhered to the PCB, and the blown dust and foreign matters are sucked away through the air suction ports on the two sides of the air blowing port, thereby ensuring the cleanness of the board surface, effectively collecting the dust and the foreign matters and preventing the generation of secondary pollution; this equipment can carry out self-cleaning to PCB board surface before the printing step of SMT paster production line to effectively prevent secondary pollution.

Drawings

FIG. 1 is a block diagram of the architecture of one embodiment of the present invention;

FIG. 2 is a schematic structural view of a cleaning unit in the embodiment shown in FIG. 1;

fig. 3 is a top view of the cleaning unit in the embodiment of fig. 1.

In the above drawings: 1. a cleaning unit; 11. a working plane; 12. an air blowing port; 13. an air suction port; 14. a blowing channel; 15. an air suction passage; 16. an air inlet; 17. an exhaust port; 2. a position sensor; 3. a programmable logic controller; 4. an air compressor; 5. a vacuum getter pump; 6. a pressure regulating filter; 7. an ion generator; 8. a pipeline; and 9, PCB board.

Detailed Description

The utility model is further described with reference to the following figures and examples:

the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure may be shown and described, and which, when modified and varied by the techniques taught herein, can be made by those skilled in the art without departing from the spirit and scope of the disclosure.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms "a", "an", "the" and "the", as used herein, also include the plural forms.

The terms "first," "second," and the like, as used herein, are not intended to be limited to a particular order or sequence, nor are they intended to be used to limit the scope of the present disclosure, but only to distinguish components or operations described by the same terms.

As used herein, "connected" or "positioned" refers to two or more elements or devices being in direct physical contact with each other or in indirect physical contact with each other, and may also refer to two or more elements or devices being in operation or acting on each other.

As used herein, the terms "comprising," "including," "having," and the like are open-ended terms that mean including, but not limited to.

As used herein, the term (terms), unless otherwise indicated, shall generally have the ordinary meaning as commonly understood by one of ordinary skill in the art, in this written description and in the claims. Certain words used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the disclosure.

The terms "front", "rear", "upper", "lower", "left" and "right" used herein are directional terms, and are used only for describing the positional relationship between the structures, and are not intended to limit the scope of protection and the actual direction of the present invention.

In the embodiment shown in fig. 1 to 3, an apparatus for cleaning the surface of a PCB before printing is provided, and a flow line 8 is arranged corresponding to the apparatus, and a PCB board 9 flows on the flow line 8; the apparatus comprises a cleaning unit 1, a position sensor 2, a programmable logic controller 3, an air compressor 4 and a vacuum sorption pump 5.

The cleaning unit 1 is arranged above the production line 8, a working plane 11 is formed at the bottom of the cleaning unit 1, a strip-shaped air blowing port 12 is formed in the working plane 11, strip-shaped air suction ports 13 are respectively arranged on two sides of the air blowing port 12, the air blowing port 12 and the air suction ports 13 extend along the width direction of the production line 8 and correspond to the width position of the production line 8, and the action range of the cleaning unit 1 covers the whole width of the production line 8.

An air blowing channel 14 and an air suction channel 15 are arranged in the cleaning unit 1, the upper end of the air blowing channel 14 is communicated with an air inlet 16, the lower end of the air blowing channel 14 is communicated with the air blowing port 12, the upper end of the air suction channel 15 is communicated with an air outlet 17, and the lower end of the air suction channel is communicated with the air suction port 13; the air inlet 16 is communicated with the air blowing end of the air compressor 4, the exhaust port 17 is communicated with the air suction end of the vacuum air suction pump 5, the air compressor 4 is a power source for blowing air, and the vacuum air suction pump 5 is a power source for sucking air.

The air compressor 4 and the vacuum suction pump 5 are both electrically connected with the output end of the programmable logic controller 3, and the programmable logic controller 3 controls the switch.

The position sensor 2 is arranged at an upstream position on the production line 8 relative to the cleaning unit 1, and the position sensor 2 is triggered when a PCB 9 passes by; the position sensor 2 is electrically connected to the input end of the programmable logic controller 3, and sends a signal to the programmable logic controller 3 when triggered.

Therefore, the equipment for cleaning the PCB surface before printing is arranged in a production line before the PCB printing step, when a PCB 9 passes by, the position sensor 2 is triggered, then the position sensor 2 sends a signal to the programmable logic controller 3, the programmable logic controller 3 starts the air compressor 4 and the vacuum suction pump 5 according to the signal, so that the cleaning unit 1 arranged above the production line 8 blows downwards through the blowing port 12 to blow up dust and foreign matters adhered to the PCB 9, and sucks away the blown dust and foreign matters through the air suction ports 13 on the two sides of the blowing port 12, thereby ensuring the cleanness of the board surface, effectively collecting the dust and the foreign matters and preventing the generation of secondary pollution; this equipment can carry out self-cleaning to PCB board 9 surface before the printing step of SMT paster production line to effectively prevent secondary pollution.

In this embodiment, the air blowing device further comprises a pressure regulating filter 6 and an ion generator 7, and the air blowing end of the air compressor 4 is communicated with the air inlet 16 after sequentially passing through the pressure regulating filter 6 and the ion generator 7.

The pressure regulating filter 6 is used for regulating the pressure of the compressed air output by the air compressor 4 to output the compressed air at a stable pressure, and finally, the air speed output by the air blowing port 12 is proper and stable; meanwhile, the pressure regulating filter 6 can also have the effect of filtering impurities; in this embodiment, the pressure regulating filter 6 regulates the pressure of the compressed air output by the air compressor 4 to 0.25 to 0.3Mpa, and the air blown out under the pressure is suitable for cleaning the PCB 9.

The ion generator 7 is used for converting wind output by the air blowing port 12 into ion wind, and can play a role in static electricity removal on the PCB 9, so that impurities and dust are prevented from being contaminated on the PCB 9 due to electrostatic adsorption in the subsequent steps, and the subsequent patch quality is ensured.

In the embodiment, the distance from the working plane 11 of the cleaning unit 1 to the cleaning surface is 1.5-2.0 mm; wherein, the cleaning surface is the surface of the PCB 9 to be cleaned in the cleaning process; under this distance, can play better clean effect and inhale grey effect.

In this embodiment, the working plane 11 is an inclined plane facing the upstream direction of the assembly line 8, so as to prevent the blown dust and foreign matters from drifting downstream of the assembly line 8; specifically, the included angle between the working plane 11 and the horizontal plane is 10 degrees, and under this angle, better cleaning effect, dust suction effect and the effect of preventing dust and foreign matters from drifting towards the assembly line 8 downstream can be obtained.

In this embodiment, the position sensor 2 is an infrared sensor, and infrared rays are used as a medium, so that the response time is short, and a better sensing effect is achieved.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A device for cleaning the surface of a PCB before printing is provided with a production line (8) corresponding to the device;

the method is characterized in that: the equipment comprises a cleaning unit (1) arranged above a production line (8), and further comprises a position sensor (2), a programmable logic controller (3), an air compressor (4) and a vacuum suction pump (5);

a working plane (11) is formed at the bottom of the cleaning unit (1), a strip-shaped air blowing port (12) is formed in the working plane (11), strip-shaped air suction ports (13) are respectively arranged on two sides of the air blowing port (12), the air blowing port (12) and the air suction ports (13) extend along the width direction of the production line (8), and the air blowing port and the air suction ports are arranged corresponding to the width position of the production line (8);

an air blowing channel (14) and an air suction channel (15) are arranged in the cleaning unit (1), the upper end of the air blowing channel (14) is communicated with an air inlet (16), the lower end of the air blowing channel is communicated with the air blowing opening (12), the upper end of the air suction channel (15) is communicated with an air outlet (17), and the lower end of the air suction channel is communicated with the air suction opening (13); the air inlet (16) is communicated with the blowing end of the air compressor (4), and the exhaust port (17) is communicated with the suction end of the vacuum suction pump (5); the air compressor (4) and the vacuum air suction pump (5) are both electrically connected with the output end of the programmable logic controller (3), and the programmable logic controller (3) controls the switch;

the position sensor (2) is arranged at the upstream position of the assembly line (8) relative to the cleaning unit (1), and the position sensor (2) is electrically connected with the input end of the programmable logic controller (3).

2. An apparatus for pre-print PCB surface cleaning according to claim 1, wherein: the air compressor is characterized by further comprising a pressure regulating filter (6), and the air blowing end of the air compressor (4) is communicated to the air inlet (16) after passing through the pressure regulating filter (6).

3. An apparatus for pre-print PCB surface cleaning according to claim 2, wherein: the pressure regulating filter (6) regulates the pressure of the compressed air output by the air compressor (4) to 0.25-0.3 Mpa.

4. An apparatus for pre-print PCB surface cleaning according to claim 2, wherein: the air compressor is characterized by further comprising an ion generator (7), and the air blowing end of the air compressor (4) sequentially passes through the pressure regulating filter (6) and the ion generator (7) and is finally communicated to the air inlet (16).

5. An apparatus for pre-print PCB surface cleaning according to claim 1, wherein: when the cleaning unit works, the distance from the working plane (11) of the cleaning unit (1) to the cleaning face is 1.5-2.0 mm.

6. An apparatus for pre-print PCB surface cleaning according to claim 1, wherein: the work plane (11) is an inclined plane facing the upstream direction of the assembly line (8).

7. An apparatus for pre-print PCB surface cleaning according to claim 6, wherein: and an included angle between the working plane (11) and the horizontal plane is 10 degrees.

8. An apparatus for pre-print PCB surface cleaning according to claim 1, wherein: the position sensor (2) is an infrared sensor.