Multi-section suction device

Abstract

The utility model belongs to the technical field of PCB (printed circuit board) production, and discloses a multi-section suction device, which is used for sucking liquid on the surface of a board and comprises a negative pressure generating component, a pipeline component, a suction component and a communicating valve. The pipeline assembly is arranged between the negative pressure generation assembly and the suction assembly, the suction assembly comprises a normally-open suction cavity and a gating suction cavity, a normally-open suction face is arranged at the end of the normally-open suction cavity, the normally-open suction cavity is communicated with the negative pressure generation assembly through the pipeline assembly, and a gating suction face is arranged at the end of the gating suction cavity. And the normally-open suction surface and the gating suction surface are positioned on the same plane. The communicating valve is arranged on the pipeline assembly and used for controlling the gating suction cavity to be communicated with or separated from the negative pressure generation assembly. The suction area can be controlled by controlling the connection and disconnection of the communication valves in the multi-section suction device, so that all the suction surfaces of the plates with different specifications and sizes can be covered, and the suction effect is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to PCB board production technical field especially relates to a multi -section type sucking device. BACKGROUND

[0002] In the production process of PCB board, need using sucking device to suck the liquid medicine on the surface of PCB board in etching stage, to avoid the water pool effect influence etching effect. And in PCB industry, to further improve production efficiency, board specification compared with before has had big change, after many year's development, relevant process equipment performance, technical ability has tended to mature, part production party needs to produce small board on the unit of large conveying surface.

[0003] In prior art, the sucking device used in etching stage is designed and made with the specification of super large board, and when sucking, the sucking surface of the sucking device needs to be fully covered by the workpiece under the premise of ensuring the sucking area, to ensure the pressure difference between the inside and outside of the sucking device and then ensure the suction effect. At this time, the small board cannot fully cover the sucking surface of the sucking device, and due to the limitation of the suction knife structure, the suction force of the sucking device on the liquid medicine on the surface of the small board is poor, which reduces the production efficiency. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a multi -section type sucking device to adapt to different specifications of PCB board according to specific needs, to suck the liquid medicine on the PCB board.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] A multi -section type sucking device, wherein, including:

[0007] Negative pressure generating assembly;

[0008] Pipeline assembly;

[0009] Sucking assembly, the pipeline assembly is arranged between the negative pressure generating assembly and the sucking assembly, the sucking assembly includes always -on sucking cavity and selected -on sucking cavity, the end of the always -on sucking cavity is provided with always -on sucking surface, and the always -on sucking cavity is kept in communication with the negative pressure generating assembly through the pipeline assembly, the end of the selected -on sucking cavity is provided with selected -on sucking surface, the always -on sucking surface and the selected -on sucking surface are located in the same plane;

[0010] Communication valve, the communication valve is arranged in the pipeline assembly, be used for controlling the selected -on sucking cavity and the negative pressure generating assembly intercommunication or mutual isolation.

[0011] As preferably, the pipeline assembly includes main flow channel and branch flow channel, the main flow channel is connected to the negative pressure generating assembly, and the branch flow channel is used to communicate the main flow channel and the sucking assembly.

[0012] As preferred, the gated suction cavity comprises a first side suction cavity and a second side suction cavity respectively located on both sides of the normally-on suction cavity along the length direction of the main flow channel.

[0013] As preferred, the first side suction cavity and the second side suction cavity are symmetrically arranged with respect to the normally-on suction cavity.

[0014] As preferred, the first side suction cavity is located on the side of the normally-on suction cavity away from the negative pressure generating assembly, the first side suction cavity and the second side suction cavity are communicated through a communication pipeline, the first side suction cavity is communicated with the main flow channel through the branch flow channel, and the communication valve is arranged in the pipeline assembly between the normally-on suction cavity and the first side suction cavity.

[0015] As preferred, the second side suction cavity is located on the side of the normally-on suction cavity close to the negative pressure generating assembly, the first side suction cavity and the second side suction cavity are communicated through a communication pipeline, the second side suction cavity is communicated with the main flow channel through the branch flow channel, and the communication valve is arranged in the branch flow channel between the second side suction cavity and the main flow channel.

[0016] As preferred, the first side suction cavity comprises a plurality of first isolation cavities arranged along the length direction of the main flow channel and separated from each other, the second side suction cavity comprises a plurality of second isolation cavities symmetrically arranged with respect to the normally-on suction cavity with the plurality of first isolation cavities, the symmetrically arranged first isolation cavities and the second isolation cavities are communicated through the communication pipeline, each of the first isolation cavities is communicated with the main flow channel through a branch flow channel, and the communication valve is arranged in the main flow channel between adjacent branch flow channels.

[0017] As preferred, the negative pressure generating assembly comprises a fluidic device, and the fluidic device is communicated with the end of the main flow channel.

[0018] As preferred, the fluid direction in the fluidic device is perpendicular to the main flow channel.

[0019] As preferred, the communication valve is a ball valve.

[0020] Beneficial effects:

[0021] The embodiment provides a multi-section suction device for sucking liquid on the surface of a plate, which comprises a negative pressure generating component, a pipeline component, a suction component and a communication valve. The negative pressure generating component is used for generating negative pressure to provide suction force. The suction component is used for directly sucking liquid on the surface of the plate and discharging the liquid. The pipeline component is arranged between the negative pressure generating component and the suction component. The suction component comprises a normally-on suction cavity and a gated suction cavity. An end of the normally-on suction cavity is provided with a normally-on suction surface and is kept in communication with the negative pressure generating component through the pipeline component. An end of the gated suction cavity is provided with a gated suction surface. The normally-on suction surface and the gated suction surface are located in the same plane. When a small plate with a size greater than the normally-on suction surface but smaller than the sum of the normally-on suction surface and the gated suction surface is processed, only the normally-on suction surface works to completely suck the liquid; when a large plate with a size greater than the sum of the normally-on suction surface and the gated suction surface is processed, the normally-on suction surface and the gated suction surface work together to suck the liquid on the surface of the plate, so that a large suction area and a proper suction force are ensured. The communication valve is arranged in the pipeline component and is used for controlling the communication or isolation of the gated suction cavity and the negative pressure generating component. The communication valve is controlled to be on or off, so that the control of the suction area is realized, the suction device is suitable for plates with different specifications and the suction effect is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Fig. 1 is a first state working schematic view of the multi-section suction device provided by the utility model;

[0023] Figure 2 Fig. 2 is a second state working schematic view of the multi-section suction device provided by the utility model.

[0024] In the figure: 1, negative pressure generating component; 2, pipeline component; 21, main flow channel; 22, branch flow channel; 3, suction component; 31, normally-on suction cavity; 32, first side suction cavity; 33, second side suction cavity; 4, communication valve. DETAILED DESCRIPTION

[0025] The utility model will be further described in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used for explaining the utility model and are not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings rather than all the structures.

[0026] In the description of the utility model, unless another definite provision and limitation, the term "link", "connection", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements internal communication or two element's mutual action relation. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional feature between them. Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the first feature horizontal height is higher than the second feature. The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the first feature horizontal height is less than the second feature.

[0028] In the description of the embodiment, the term "on", "under", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawing, just for easy description and simplification operation, and not indicate or imply the device or element referred to must have a particular orientation, with a particular orientation configuration and operation, therefore cannot be understood as the limitation of the utility model. In addition, the term "first", "second" is just used to distinguish in the description, and has no special meaning.

[0029] As Figure 1 And Figure 2As shown, the embodiment provides a multi-section suction device for sucking liquid on the surface of a plate, which comprises a negative pressure generating component 1, a pipeline component 2, a suction component 3 and a communication valve 4. The negative pressure generating component 1 is used to generate negative pressure to provide suction force. The suction component 3 is used to directly suck liquid on the surface of the plate and discharge the liquid. The pipeline component 2 is arranged between the negative pressure generating component 1 and the suction component 3. The suction component 3 comprises a normally-on suction cavity 31 and a gated suction cavity. The normally-on suction cavity 31 is provided with a normally-on suction surface at the end thereof and is kept in communication with the negative pressure generating component 1 through the pipeline component 2. The gated suction cavity is provided with a gated suction surface at the end thereof. The normally-on suction surface and the gated suction surface are located in the same plane. When a small plate with a size greater than the normally-on suction surface but less than the sum of the normally-on suction surface and the gated suction surface is processed, only the normally-on suction surface works to completely suck the liquid; when a large plate with a size greater than the sum of the normally-on suction surface and the gated suction surface is processed, the normally-on suction surface and the gated suction surface work together to suck the liquid on the surface of the plate, which can ensure the size of the suction force while having a large suction area. The communication valve 4 is arranged in the pipeline component 2 and is used to control the mutual communication or isolation of the gated suction cavity and the negative pressure generating component 1. The control of the on-off of the communication valve 4 can realize the control of the suction area to adapt to different specifications of the plate and ensure the suction effect.

[0030] Specifically, when the communication valve 4 is opened, the multi-section suction device is in a first working state and is used to process a large PCB plate. When the communication valve 4 is closed, the multi-section suction device is in a second working state and is used to process a small PCB plate. The size of the small PCB plate is greater than the normally-on suction surface but less than the sum of the normally-on suction surface and the gated suction surface. The size of the large PCB plate is greater than the sum of the normally-on suction surface and the gated suction surface.

[0031] Specifically, in the embodiment, the pipeline component 2 comprises a main flow channel 21 and a branch flow channel 22. The main flow channel 21 is connected to the negative pressure generating component 1. The branch flow channel 22 is used to communicate the main flow channel 21 and the suction component 3. The main flow channel 21 is directly communicated with the negative pressure generating component 1. The branch flow channel 22 is further communicated with the main flow channel 21 and the suction component 3, respectively. This avoids the need to arrange multiple different main flow channels 21 to be communicated with each cavity, reduces the overall length of the required pipeline and reduces material consumption. At the same time, the suction force of each cavity is derived from the same main flow channel 21, which can provide uniform suction force to the surface of the PCB plate and ensure the suction effect of the liquid on the PCB plate. It can be understood that the size of the suction force generated by the suction component 3 can be adjusted by changing the model and power of the negative pressure generating component 1 and / or the thickness of the pipeline component 2, which is not limited in the embodiment.

[0032] Specifically, in the embodiment, the gated suction cavities include a first side suction cavity 32 and a second side suction cavity 33 respectively located on both sides of the always-on suction cavity 31 along the length direction of the main flow channel 21. The always-on suction surface of the always-on suction cavity 31 can continuously generate suction force to suck the liquid medicine. When a large-sized PCB needs to be processed, the gated suction surfaces on the first side suction cavity 32 and the second side suction cavity 33 are communicated with the negative pressure generating assembly 1 to generate suction force, and the liquid medicine is sucked together with the always-on suction surface. When a small-sized PCB needs to be sucked, the gated suction surfaces on the first side suction cavity 32 and the second side suction cavity 33 are isolated from the negative pressure generating assembly 1, and only the always-on suction surface sucks the PCB. Further, the first side suction cavity 32 and the second side suction cavity 33 can generate suction force simultaneously or separately to more flexibly adjust the suction area and process PCBs of different sizes. It can be understood that in the PCB production process, the PCB needs to be driven by a transmission device to move to complete each process. During the transmission process, the PCB is usually arranged at the middle position of the conveying belt to avoid the PCB from being separated from the conveying belt during the movement process. Therefore, when the communication valve 4 is closed, the always-on suction surface arranged in the middle can correspond to the liquid on the surface of the small-sized PCB arranged in the middle of the conveying belt; when the communication valve 4 is opened, the always-on suction surface and the gated suction surface correspond to the liquid on the surface of the large-sized PCB arranged in the middle of the conveying belt.

[0033] Further, in the embodiment, the first side suction cavity 32 and the second side suction cavity 33 are symmetrically arranged about the always-on suction cavity 31. The first side suction cavity 32 and the second side suction cavity 33 symmetrically arranged about the always-on suction cavity 31 can make the liquid on the surface of the large-sized PCB placed in the middle be uniformly sucked when the PCB passes through the multi-section suction device, avoiding that the liquid on the end of the surface of the PCB is not processed.

[0034] Further, in the embodiment, the first side suction cavity 32 is located on the side of the always-on suction cavity 31 away from the negative pressure generating assembly 1. The first side suction cavity 32 and the second side suction cavity 33 are connected through a communication pipeline. The first side suction cavity 32 is connected to the main flow channel 21 through the branch flow channel 22. The communication valve 4 is arranged in the pipeline assembly 2 between the always-on suction cavity 31 and the first side suction cavity 32. At this time, only the first side suction cavity 32 and the always-on suction cavity 31 are connected to the main flow channel 21. The second side suction cavity 33 needs to be connected to the main flow channel 21 through the first side suction cavity 32. When the communication valve 4 is closed, the first side suction cavity 32 is isolated from the negative pressure suction assembly 3. At this time, only the always-on suction surface works to suck the liquid on the PCB board, so as to adapt to small PCB boards. When the communication valve 4 is opened, the first side suction cavity 32 is connected to the negative pressure suction assembly 3. At this time, the always-on suction surface and the gated suction surface work together to suck the liquid on the PCB board, so as to adapt to large PCB boards. The arrangement of the first side suction cavity 32, the second side suction cavity 33, the communication pipeline and the communication valve 4 can reduce the demand for the number of communication valves 4. The operator or the control unit only needs to control the communication valve 4 at the first side suction cavity 32 to realize the control of the suction force of the gated suction surface on both sides of the always-on suction surface. The control process is simple and efficient.

[0035] Further, in the embodiment, the first side suction cavity 32 includes a plurality of first isolation cavities arranged along the length direction of the main flow channel 21 and separated from each other. The second side suction cavity 33 includes a plurality of second isolation cavities arranged symmetrically with the plurality of first isolation cavities about the always-on suction cavity. The first isolation cavities and the second isolation cavities symmetrically arranged with each other are connected through a communication pipeline. Each first isolation cavity is connected to the main flow channel 21 through a branch flow channel 22. The main flow channel 21 between adjacent branch flow channels 22 is provided with a communication valve 4. It can be understood that when a certain communication valve 4 is closed, the main flow channel 21 away from the fluidic device is isolated from the negative pressure generating assembly 1. The first isolation cavity corresponding to this communication valve 4 cannot generate suction force. In addition, the second isolation cavity corresponding to the above-mentioned first isolation cavity cannot generate suction force. Therefore, only one communication valve 4 needs to be closed to realize the multi-stage regulation and control of the suction surface at the bottom of the two side isolation cavities, which can be suitable for the suction of liquid on the surfaces of more different specifications and sizes of PCB boards. In some other embodiments, a communication valve 4 can also be arranged on the branch flow channel 22 directly connected to each first isolation cavity. The on-off of each communication valve 4 is controlled according to the demand when switching the working state.

[0036] Further, in the embodiment, the first side suction cavity 32 and the second side suction cavity 33 each have only one cavity. The two cavities are connected through a connection pipeline transversely crossing the always-on suction cavity 31.

[0037] Further, in the embodiment, the second side suction cavity 33 is located at the side of the always-on suction cavity 31 close to the negative pressure generating assembly 1, the first side suction cavity 32 and the second side suction cavity 33 are communicated through the communication pipeline, the second side suction cavity 33 is communicated with the main flow channel 21 through the branch flow channel 22, and the communication valve 4 is arranged in the branch flow channel 22 between the second side suction cavity 33 and the main flow channel 21. At this time, only the second side suction cavity 33 and the always-on suction cavity 31 are communicated with the main flow channel 21, and the first side suction cavity 32 needs to be communicated with the main flow channel 21 through the first side suction cavity 32. When the communication valve 4 is closed, the second side suction cavity 33 is isolated from the negative pressure suction assembly 3, at this time, only the always-on suction surface works to suck the liquid medicine on the PCB board, so as to adapt to the small PCB board; when the communication valve 4 is opened, the second side suction cavity 33 is communicated with the negative pressure suction assembly 3, at this time, the always-on suction surface and the gating suction surface work together to suck the liquid medicine on the PCB board, so as to adapt to the large PCB board.

[0038] Specifically, in the embodiment, the negative pressure generating assembly 1 includes a fluidic device, and the fluidic device is communicated with the end of the main flow channel 21. When the multi-section suction device works, the fluidic device generates directional high-speed fluid, the directional high-speed fluid expels the air in the pipeline assembly 2 and the suction assembly 3, so that the air pressure in the suction assembly 3 is lower than the external air pressure to generate a pressure difference. When the PCB board with liquid medicine attached approaches the always-on suction surface and the gating suction surface, the pressure difference generates corresponding force to drive the liquid medicine to enter the fluidic device through the suction assembly 3 and the pipeline assembly 2 and be expelled by the directional high-speed fluid, so as to avoid the water pool effect on the PCB board.

[0039] When the liquid medicine on the surface of the large PCB board is sucked, the communication valve 4 is opened, and the liquid medicine on the surface of the large PCB board is sucked into the pipeline assembly 2 through the always-on suction surface and the gating suction surface and is taken out by the directional high-speed fluid in the fluidic device.

[0040] When the liquid medicine on the surface of the small PCB board is sucked, the communication valve 4 is opened, and the liquid medicine on the surface of the small PCB board is only sucked into the pipeline assembly 2 through the always-on suction surface and is taken out by the directional high-speed fluid in the fluidic device.

[0041] Specifically, in the embodiment, the fluid direction in the fluidic device is perpendicular to the main flow channel 21. When the PCB board moves to the multi-section suction device, the PCB board is kept in a horizontal state to complete the reaction of the liquid medicine and the board material. At this time, the main flow channel 21 is also horizontally arranged to make the always-on suction surface and the gating suction surface located in the same horizontal plane. At the same time, the fluidic device is vertically arranged and connected with the main flow channel 21, which reduces the horizontal space occupation of the whole multi-section suction device and provides space utilization rate.

[0042] Specifically, in the embodiment, the communication valve 4 is a ball valve. The ball valve is simple in structure, easy to operate, and small in fluid resistance, and can ensure that a large enough suction force is generated at the selected suction surface. In some other embodiments, it can also be a gate valve, a plug valve, etc., which are not limited in the embodiment.

[0043] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent substitution and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A multi-stage suction device for suctioning liquid from the surface of a sheet material, characterized in that, include: Negative pressure generating component (1); Pipe assembly (2); The suction assembly (3) is provided between the negative pressure generating assembly (1) and the suction assembly (3). The suction assembly (3) includes a normally open suction chamber (31) and a selective suction chamber. The end of the normally open suction chamber (31) is provided with a normally open suction surface, and the normally open suction chamber (31) is connected to the negative pressure generating assembly (1) through the pipe assembly (2). The end of the selective suction chamber is provided with a selective suction surface, and the normally open suction surface and the selective suction surface are located on the same plane. A connecting valve (4) is provided on the pipeline assembly (2) for controlling the connection or isolation between the selective suction chamber and the negative pressure generating assembly (1).

2. The multi-stage suction device according to claim 1, characterized in that, The pipeline assembly (2) includes a main channel (21) and a branch channel (22). The main channel (21) is connected to the negative pressure generating assembly (1), and the branch channel (22) is used to connect the main channel (21) and the suction assembly (3).

3. The multi-stage suction device according to claim 2, characterized in that, The selective suction chamber includes a first side suction chamber (32) and a second side suction chamber (33) located on both sides of the normal suction chamber (31) along the length direction of the main channel (21).

4. The multi-stage suction device according to claim 3, characterized in that, The first side suction cavity (32) and the second side suction cavity (33) are symmetrically arranged with respect to the normally open suction cavity (31).

5. The multi-stage suction device according to claim 3, characterized in that, The first side suction chamber (32) is located on the side of the normally open suction chamber (31) away from the negative pressure generating assembly (1). The first side suction chamber (32) and the second side suction chamber (33) are connected by a connecting pipe. The first side suction chamber (32) is connected to the main flow channel (21) through the branch flow channel (22). The connecting valve (4) is disposed in the pipe assembly (2) between the normally open suction chamber (31) and the first side suction chamber (32).

6. The multi-stage suction device according to claim 3, characterized in that, The second side suction chamber (33) is located on the side of the normally open suction chamber (31) near the negative pressure generating component (1). The first side suction chamber (32) and the second side suction chamber (33) are connected by a connecting pipe. The second side suction chamber (33) is connected to the main flow channel (21) through the branch flow channel (22). The connecting valve (4) is located in the branch flow channel (22) between the second side suction chamber (33) and the main flow channel (21).

7. The multi-stage suction device according to claim 5, characterized in that, The first side suction chamber (32) includes a plurality of first isolation chambers, which are arranged along the length of the main flow channel (21) and separated from each other. The second side suction chamber (33) includes a plurality of second isolation chambers, which are symmetrically arranged with respect to the normally open suction chamber. The symmetrical first isolation chambers and second isolation chambers are connected through the connecting pipe. Each first isolation chamber is connected to the main flow channel (21) through a branch flow channel (22). A connecting valve (4) is provided on the main flow channel (21) between adjacent branch flow channels (22).

8. The multi-stage suction device according to claim 2, characterized in that, The negative pressure generating component (1) includes an ejector that is connected to the end of the main channel (21).

9. The multi-stage suction device according to claim 8, characterized in that, The fluid direction within the ejector is perpendicular to the main flow channel (21).

10. The multi-stage suction device according to any one of claims 1-9, characterized in that, The connecting valve (4) is a ball valve.

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