Bubble suction knife and PCB drying device

Abstract

The utility model discloses a bubble absorbing knife and a PCB drying device. The bubble absorbing knife comprises an outer shell which is formed by extending along a first direction and is internally provided with an air flow channel, wherein a plurality of bubble absorbing parts which are communicated with the air flow channel at intervals are formed at the bottom of the outer shell along the first direction; wherein each bubble suction part is provided with at least one inlet communicated with the airflow channel, and at least one outlet communicated with the airflow channel is formed in the outer shell; according to the utility model, the problems of long drying time and high energy consumption existing in a drying oven drying mode after the PCB is cleaned can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB processing, and particularly relates to a bubble suction knife and a PCB board drying device. Background Art

[0002] PCB board etching is an important process in the manufacturing process of PCB (Printed Circuit Board). It involves removing the unnecessary copper layer from the circuit board to form the required circuit pattern. Before etching, the PCB board needs to be cleaned to remove possible impurities such as oil stains, oxides, and dust to ensure the clarity of the etched pattern. After the PCB board is cleaned, the well-known method for cleaning water stains is mostly oven drying. However, the method of directly sending the PCB board into the oven has problems such as long drying time and high energy consumption.

[0003] In view of this, the present application proposes a bubble suction knife and a PCB board drying device that can suck the water stains and foam on the surface of the PCB board. Summary of the Utility Model

[0004] The utility model aims to solve the above technical problems, that is, after the PCB board is cleaned, the method of using oven drying has problems such as long drying time and high energy consumption.

[0005] In a first aspect, the utility model provides a bubble suction knife, which includes a housing with an air flow channel formed by extending along a first direction. The bottom of the housing forms a plurality of spaced-apart bubble suction parts along the first direction that communicate with the air flow channel; wherein, each of the bubble suction parts is provided with at least one inlet communicating with the air flow channel, and at least one outlet communicating with the air flow channel is formed on the housing.

[0006] The present application controls the formation of negative pressure in the air flow channel of the housing and in the bubble suction parts, so as to suck the water stains and foam existing on the surface of the PCB board passing through the inlet direction of the bubble suction parts into the bubble suction parts and the air flow channel, realizing the removal of water stains on the surface of the PCB board. It has the characteristics of high efficiency in removing water stains and foam and is practical.

[0007] In a preferred technical solution of the above bubble suction knife, it further includes a rotating shaft configured to penetrate each of the bubble suction parts along the first direction, and a roller installed on the rotating shaft is arranged between adjacent bubble suction parts.

[0008] In a preferred technical solution of the above bubble suction knife, a guiding structure is formed on the side surface of the bottom of the bubble suction part facing the feeding direction of the PCB board.

[0009] In a preferred technical solution of the above bubble suction knife, a negative pressure pipe is threadedly installed on the outlet of the housing.

[0010] In the preferred technical solution of the above-mentioned bubble-sucking knife, the inlet at the bottom surface of the bubble-sucking part is one of a snake shape, an arc shape, a square shape or a strip shape.

[0011] In the preferred technical solution of the above-mentioned bubble-sucking knife, a PTFE coating is sprayed in the air flow channel of the outer housing.

[0012] In a second aspect, the present utility model further provides a PCB board drying device, which includes the above-mentioned bubble-sucking knife, and further includes a conveying roller disposed below the bubble-sucking part along the first direction, and a driving device for controlling the rotation of the conveying roller. The conveying roller is used to convey the PCB board towards the lower part of the bubble-sucking part.

[0013] In the preferred technical solution of the above-mentioned PCB board drying device, a driving gear is installed on the conveying roller, and a driven gear meshing with the driving gear is disposed on the rotating shaft.

[0014] The beneficial effect of the present utility model is that by controlling the operation of the negative pressure device, a negative pressure is formed in the air flow channel of the outer housing and in the bubble-sucking part. Then, the PCB board is fed into the inlet at the lower part of the bubble-sucking part along the direction perpendicular to the side of the bubble-sucking part. As the PCB board moves, the negative pressure formed at the inlet of the bubble-sucking part can suck the water stains and foam existing on the surface of the PCB board into the bubble-sucking part and the air flow channel, realizing the removal of the water stains on the surface of the PCB board. It has the characteristics of high efficiency in removing water stains and foam and is practical. Description of the Drawings

[0015] Figure 1 is the front view of the bubble-sucking knife;

[0016] Figure 2 is the top view of the bubble-sucking knife;

[0017] Figure 3 is the left view of the bubble-sucking knife;

[0018] Figure 4 is the connection schematic diagram of the bubble-sucking knife and the PCB board drying device;

[0019] In the figure: outer housing 1, bubble-sucking part 11, rotating shaft 2, roller 3, guiding structure 4, negative pressure pipe 5, conveying roller 6, conveying wheel 61, driving gear 7, driven gear 8. Detailed Embodiments

[0020] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0021] It should be noted that in the description of the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] As Figures 1 to 3 shown, the bubble suction knife of the present utility model includes a housing 1 with an air flow channel formed inside and extending along a first direction. At the bottom of the housing 1, a plurality of bubble suction parts 11 communicating with the air flow channel are formed at intervals along the first direction. Among them, each bubble suction part 11 is provided with at least one inlet communicating with the air flow channel, and at least one outlet communicating with the air flow channel is formed on the housing 1.

[0024] See Figure 1 、 Figure 2 , the first direction is the length direction of the housing 1.

[0025] See Figure 1 、 Figure 2 As shown, the housing 1 is in a long strip shape. The air flow channel formed inside the housing 1 is used for air flow. A plurality of independent bubble suction parts 11 are formed by extending the lower part of the housing 1. The bubble suction parts 11 are in a hollow structure. The internal space of the bubble suction parts 11 communicates with the air flow channel of the housing 1. The bottom of the bubble suction parts 11 forms an air inlet, and the top of the housing 1 forms an air outlet. It should be noted that each bubble suction part 11 corresponds to a PCB board. Through this setting, the cleaning efficiency of water stains and foams on the surface of the PCB board can be improved. The air outlet of the housing 1 is used to connect a negative pressure device, and the negative pressure device can extract the internal air flow of the housing 1, so that a negative pressure is formed inside the housing 1 and the bubble suction parts 11.

[0026] See Figures 1 to 3, before the PCB board is etched, it is necessary to clean the PCB board and remove the water stains and foam on the surface of the cleaned PCB board; when removing the water stains on the PCB board, first control the negative pressure device to work so that a negative pressure is formed in the air flow channel of the outer casing 1 and in the bubble suction part 11. Then, insert the PCB board into the inlet below the bubble suction part 11 along the direction perpendicular to the side of the bubble suction part 11. As the PCB board moves, the negative pressure formed at the inlet of the bubble suction part 11 can suck the water stains and foam on the surface of the PCB board into the bubble suction part 11 and the air flow channel, realizing the removal of the water stains on the surface of the PCB board. It has the characteristics of high efficiency in removing water stains and foam and is practical.

[0027] In one or more embodiments, it further includes a rotating shaft 2 disposed through each bubble suction part 11 along the first direction, and a roller 3 mounted on the rotating shaft 2 is disposed between adjacent bubble suction parts 11.

[0028] See Figure 1 , Figure 3 , the rotating shaft 2 passes through each bubble suction part 11 along the first direction, and the rotating shaft 2 can rotate relative to the bubble suction part 11, thereby controlling the rotation of the roller 3 disposed between adjacent bubble suction parts 11 to realize the transportation of the PCB board. It should be noted that the bottom end of the roller 3 is located below the bottom end of the bubble suction part 11. In this way, it can avoid the problem that the negative pressure generated at the inlet of the bubble suction part 11 adsorbs the PCB board on the bottom surface of the bubble suction part 11, making it difficult for the PCB board to move, and ensures the progress of the work of removing the water stains on the surface of the PCB board.

[0029] In one or more embodiments, a guiding structure 4 is formed on the side of the bottom of the bubble suction part 11 facing the feeding direction of the PCB board.

[0030] See Figure 1 , Figure 3 , to facilitate the PCB board to smoothly enter the space below the bubble suction part 11, a guiding structure 4 is disposed on the side of the bubble suction part 11 facing the feeding direction of the PCB board. The guiding structure 4 can limit the end of the PCB board, avoiding the problem that the PCB board warps at one end close to the bubble suction part 11 and cannot enter the bottom of the bubble suction part 11, ensuring the removal of the water stains on the PCB board and reducing the possibility of damage to the PCB board due to warping and abutting against the bubble suction part 11.

[0031] In other possible embodiments, a housing cover for covering the rotating shaft 2 is disposed in the bubble suction part 11, and the housing cover is disposed on the inner wall of the bubble suction part 11 along the first direction. The cross section of the housing cover is generally in a rhombus structure. Through this setting, it can facilitate the flow of the air flow in the bubble suction part 11 and ensure the effect of removing the water stains on the surface of the PCB board.

[0032] In one or more embodiments, a negative pressure pipe 5 is threadedly installed at the outlet of the outer casing 1. SeeFigures 1 to 3 , the negative pressure tube 5 is used to connect an external negative pressure device. By configuring the negative pressure tube 5 to be threadedly connected to the outlet of the outer housing 1, the adjustment of the interface direction of the negative pressure tube 5 can be achieved, meeting the requirements under different production conditions and having practicality.

[0033] In one or more embodiments, the inlet on the bottom surface of the bubble suction part 11 is one of a snake shape, an arc shape, a square shape, or a strip shape. Each bottom surface of the bubble suction part 11 has at least one inlet. When there is one inlet, the shape of the inlet can be one of a "one" shape, a snake shape, or a square shape; when there are multiple inlets, the shape of the inlet can be one of a strip shape, a "<" shape, or a square shape; it should be noted that the shape of the inlet can be adjusted according to actual production needs and is not specifically limited.

[0034] In other possible ways, the bottom of the bubble suction part 11 is a plate-like structure, and the inlet is opened on this plate-like structure. This plate-like structure is detachably installed at the bottom end of the bubble suction part 11 through bolts; through this setting, the quick replacement according to the required inlet shape can be realized, improving the applicable range and assembly efficiency of the bubble suction knife.

[0035] In one or more embodiments, a PTFE coating is sprayed in the air flow channel of the outer housing 1. It should be noted that the PTFE coating has a certain self-lubricating effect. By spraying the PTFE coating on the inner surface of the air flow channel, it can effectively ensure that the liquid is quickly pumped out of the outer housing 1, reducing the accumulation of liquid in the outer housing 1.

[0036] In addition, referring to Figure 4 , the present utility model further provides a PCB board drying device. This PCB board drying device has the bubble suction knife in any of the above embodiments, and further includes a conveying roller 6 arranged below the bubble suction part 11 along the first direction and a driving device for controlling the rotation of the conveying roller 6. The conveying roller 6 is used to convey the PCB board towards the lower part of the bubble suction part 11; a driving gear 7 is installed on the conveying roller 6, and a driven gear 8 meshing with the driving gear 7 is arranged on the rotating shaft 2.

[0037] Referring to Figure 4 , the PCB board drying device includes an outer housing 1 equipped with a rotating shaft 2 and a roller 3, and further includes a conveying roller 6 arranged directly below the bubble suction part 11 of the outer housing 1. A number of conveying wheels 61 are formed on the conveying roller 6, and some of the multiple conveying wheels 61 correspond to the roller 3, so as to form a rolling conveyance of the PCB board, and at the same time, it can prevent the PCB board from being adsorbed by the air flow at the inlet of the bubble suction part 11, ensuring the stability of the PCB board conveyance.

[0038] Referring to Figure 4, a driving gear 7 is arranged on the conveying roller 6, a driven gear 8 meshing with the driving gear 7 is arranged on the rotating shaft 2, and a driving device is arranged on the conveying roller 6. The driving device can be a servo motor. The rotation of the conveying roller 6 is controlled by the driving device. The conveying roller 6 drives the driven gear 8 to rotate through the driving gear 7, and then the rotating shaft 2 drives the roller 3 to rotate, realizing the synchronous rotation of the roller 3 and the conveying wheel 61, and further improving the stability of the PCB board conveying.

[0039] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A bubble suction knife, characterized in that: It comprises an outer shell body extending along a first direction and having an air flow channel therein, wherein a plurality of bubble suction portions connected to the air flow channel and spaced from each other are formed at the bottom of the outer shell body along the first direction; wherein each of the bubble suction portions is provided with at least one inlet connected to the air flow channel, and at least one outlet connected to the air flow channel is formed on the outer shell body.

2. The bubble suction knife according to claim 1, characterized in that: It also includes a rotating shaft that passes through each of the bubble absorbing parts along a first direction, and a roller installed on the rotating shaft is arranged between adjacent bubble absorbing parts.

3. The bubble suction knife according to claim 2, characterized in that: The bottom of the bubble absorbing portion forms a guiding structure on the side facing the feeding direction of the PCB board.

4. The bubble suction knife according to claim 2, characterized in that: A negative pressure pipe is threadedly mounted on the outlet of the outer shell.

5. The bubble suction knife according to claim 2, characterized in that: The inlet on the bottom surface of the bubble absorbing part is in a snake-shaped, arc-shaped, square-shaped or strip-shaped in one.

6. The bubble suction knife according to claim 2, characterized in that: The air flow channel of the outer shell is sprayed with a PTFE coating.

7. A PCB board drying device, characterized in that: It comprises the bubble suction knife according to any one of claims 2 to 6, and also comprises a conveying roller arranged below the bubble suction part along the first direction, and a driving device for controlling the rotation of the conveying roller, wherein the conveying roller is used to convey the PCB board toward below the bubble suction part.

8. The PCB board drying device according to claim 7, characterized in that: A driving gear is installed on the conveying roller, and a driven gear meshing with the driving gear is arranged on the rotating shaft.

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