PCB Cleaning Apparatus and PCB Cleaning Method

Abstract

The present invention relates to a PCB cleaning device and a PCB cleaning method using the same. The present invention provides a PCB cleaning device for removing particles from the surface of a PCB, comprising: a housing having an open side, the housing comprising an upper member having a curved surface formed on its lower surface capable of inducing a Coanda effect and an end member coupled to one lower surface of the upper member so as to protrude downward; a first air knife installed opposite the end member of the upper member to spray air toward the curved surface; a second air knife installed below the first air knife to spray air toward the PCB; and a suction part installed on the end member to suck in the air sprayed from the first air knife and the second air knife; wherein the PCB cleaning device induces a Coanda effect while flowing along the curved surface sprayed from the first air knife.

Description

Technology Field

[0001] The present invention relates to a PCB cleaning device and a PCB cleaning method using the same. Background Technology

[0003] The manufacturing process of a PCB board includes the process of cleaning the PCB board and the process of drying the cleaned PCB board.

[0004] Conventional drying devices dry cleaned PCB boards by applying air using an air intake fan, but there is a problem in that particles contained in the air remain on the PCB boards, causing defects.

[0005] Korean Registered Patent No. 10-927111 relates to a particle removal device for removing particles from a carrier tape that transports semiconductor chips. It includes a configuration in which a fan, acting as a dust reduction means, is installed on the upper part of the main body, and air is drawn into the interior of the main body along an air intake path by the rotation of the fan. However, since the main body is equipped with side walls, the height of the housing is fixed, which presents a problem in that the height of the housing cannot be adjusted. If the side walls are removed to adjust the height of the housing, the airflow is dispersed outward from the side walls, making it impossible to expect a sufficient particle removal effect. The problem to be solved

[0007] The present invention was devised to solve the problems of the background technology, and the problem to be solved by the present invention is to provide a PCB cleaning device and a PCB cleaning method using the same that can maximize the particle removal effect by an air knife by removing the side member of the housing to lower the housing as much as possible. means of solving the problem

[0009] As a means of solving the aforementioned problem, the present invention is,

[0010] In a PCB cleaning device for removing particles from the surface of a PCB,

[0011] A housing having an open side, comprising an upper member having a curved surface formed on its lower surface capable of inducing a Coanda effect, and an end member coupled to one lower surface of the upper member so as to protrude downward;

[0012] A first air knife installed on the opposite side of the end member of the upper member to spray air toward the curved surface;

[0013] A second air knife installed below the first air knife and spraying air toward the PCB;

[0014] It includes a suction part installed on the above end member, into which air sprayed from the first air knife and the second air knife is sucked;

[0015] A PCB cleaning device is provided that induces a Coanda effect while flowing along the curved surface sprayed from the first air knife.

[0016] It is preferable that the first air knife and the second air knife are of the hole type.

[0017] It is more preferable to further include a second driving means for vibrating the second air knife in the direction in which the hole is arranged.

[0018] It is preferable to further include a first driving means for vibrating the first air knife in the direction in which the hole is arranged.

[0019] It is preferable that the amplitude of the second air knife driven by the second driving means is half the spacing of the hole, and the amplitude of the first air knife driven by the first driving means is half the spacing of the hole.

[0020] In addition, the present invention,

[0021] In a PCB cleaning method for removing particles from the surface of a PCB,

[0022] A step of providing a PCB cleaning device as described in claim 1;

[0023] A spraying step in which a PCB is placed below the above housing and air is sprayed from a first air knife and a second air knife;

[0024] A PCB cleaning method is provided that includes a suction step of sucking in air sprayed from a first air knife and a second air knife by the suction part. Effects of the invention

[0026] According to the present invention, a PCB cleaning device and a PCB cleaning method using the same can be provided, which can maximize the particle removal effect by an air knife by removing a side member to lower the housing as much as possible. Brief explanation of the drawing

[0028] FIG. 1 is a perspective view for explaining a PCB cleaning device according to one embodiment of the present invention. FIG. 2 is a side view illustrating the airflow of the PCB cleaning device shown in FIG. 1. FIG. 3 is a front view illustrating the airflow of the PCB cleaning device shown in FIG. 1. Figure 4 is a drawing for explaining a hole-type air knife. FIG. 5 is a drawing for explaining the vibration of the hole-type air knife illustrated in FIG. 4. Specific details for implementing the invention

[0029] Hereinafter, specific details for implementing the present invention are provided by describing preferred embodiments of the present invention with reference to the drawings.

[0031] First, we will describe one embodiment of the PCB cleaning device, which is the first form of the present invention.

[0033] FIG. 1 is a perspective view for explaining a PCB cleaning device according to one embodiment of the present invention, FIG. 2 is a side view for explaining the airflow of the PCB cleaning device shown in FIG. 1, FIG. 3 is a front view for explaining the airflow of the PCB cleaning device shown in FIG. 1, FIG. 4 is a drawing for explaining a hole-type air knife, and FIG. 5 is a drawing for explaining the vibration of the hole-type air knife shown in FIG. 4.

[0035] A PCB cleaning device according to the present embodiment is a device for removing particles from the surface of a PCB (PCB; reference numeral P) and comprises a housing (10), a first air knife (20), a second air knife (30), and a suction part (40).

[0036] As shown in FIG. 1, the PCB moves along the rail (R) in one direction, and during the movement, particles on the surface are removed using the PCB cleaning device of this embodiment.

[0037] The above housing (10) includes an upper member (12) having a curved surface (11) formed on its lower surface that can induce a Coanda effect as shown in FIG. 1, and an end member (13) that is coupled to one side of the upper member to protrude downward, and has an open side.

[0038] The first air knife (20) is a hole type and is configured to spray air toward the curved surface (11) by being installed on the opposite side of the end member (13) of the upper member (12). A hole type means that the nozzle is in the shape of a hole, as shown in FIG. 4, and has the effect of spraying a strong wind compared to a slit type. In this embodiment, the nozzle is circular, and the spacing between the nozzles is equal to the diameter of the circle.

[0039] The air sprayed from the first air knife (20) moves to the suction part (40) by passing through the curved surface (11) of the housing (10) as shown in FIG. 2 to induce a Coanda effect.

[0040] The second air knife (30) is installed at the bottom of the first air knife (10) and is configured to spray air toward the PCB (P). As shown in the air flow in Fig. 2, the air sprayed from the second air knife (30) is sprayed toward the top of the PCB (P) to remove particles from the PCB (P).

[0041] The second air knife (30) above is also of the hole type, just like the first air knife (20). As previously mentioned, a hole type means that the nozzle is in the shape of a hole, and it has the effect of being able to spray a stronger wind compared to a slit type. In this embodiment, the nozzle is circular, and the spacing (d) between the nozzles is equal to the diameter of the circle.

[0042] The first air knife (20) and the second air knife (30) can be combined with an air compressor capable of spraying air, and since this is a well-known technology, further explanation will be omitted.

[0043] The first air knife (20) and the second air knife (30) each vibrate in the direction in which the hole is arranged by a first driving means (not shown) and a second driving means (not shown), and the vibration amplitude is half (1 / 2d) of the hole spacing (d).

[0044] The above-mentioned first or second driving means may utilize configurations such as a motor and a cam. Since there are various mechanical means capable of inducing linear vibrational motion, they can be appropriately selected and applied; as such a selection is sufficiently possible for a person with average knowledge in the technical field to which this invention belongs, further explanation is omitted.

[0045] As described above, the first air knife (20) and the second air knife (30) are both of the hole type and have the disadvantage that air is ejected only through the nozzle in the shape of a circular hole, so air is not ejected in the parts without the nozzle. This disadvantage is resolved by vibrating the first air knife (20) and the second air knife (30) by the first driving means and the second driving means.

[0046] The first air knife (20) and the second air knife (30) vibrate between the state shown in (a) and the state shown in (b) of FIG. 5, thereby allowing air to be sprayed even in parts without holes.

[0047] The suction part (40) is installed on the end member (12) of the housing (10) to suck in air sprayed from the first air knife (20) and the second air knife (30), and is connected to a configuration such as a vacuum pump (not shown). The suction part (40) also sucks in particles separated from the surface of the PCB (P) by the sprayed air.

[0049] As illustrated in FIG. 1, the housing of the present invention has an open side. If there is a side member in the housing, there is a limit to bringing the housing closer to the PCB (P) due to interference between the side member and the rail (R). However, if there is no side member, the air sprayed from the second air knife (30) is dispersed to the outside of the housing, causing a problem where the particle removal effect is reduced. In the present invention, by using the first air knife (20) that induces the Coanda effect, the air sprayed from the second air knife (30) spreads to the left and right, while allowing the housing (10) to be lowered closer to the PCB (P), thereby maximizing the cleaning effect.

[0050] FIGS. 3 and 4 show the results of simulating the airflow sprayed from the first air knife (20) and the second air knife (30). As shown in FIG. 4, it can be seen that there is almost no air flowing out of the housing (10) even though there are no side members.

[0052] Hereinafter, one embodiment of the PCB cleaning method, which is the second form of the present invention, will be described.

[0053] The PCB cleaning method according to the present embodiment comprises a preparation step, a spraying step, and a suction step.

[0054] The above preparation step is the step of preparing the aforementioned PCB cleaning device; since the PCB cleaning device has been sufficiently explained previously, further explanation will be omitted.

[0055] The above injection step is a step of placing a PCB (P) below the housing (10) and injecting air from the first air knife (20) and the second air knife (30). As described above, the first air knife (20) and the second air knife (30) are of the hole type, and air is injected while vibrating the first air knife (20) and the second air knife (30) by the first driving means and the second driving means.

[0056] The air sprayed from the first air knife (20) moves along the curved surface (11) and causes a Coanda effect, and the dispersion of the air sprayed from the second air knife (30) is minimized by the caused Coanda effect.

[0057] The above suction step is a step of sucking in air sprayed from the first air knife (20) and the second air knife (30) by the suction part (40), and in this process, particles separated from the PCB (P) are also sucked into the suction part (40).

[0059] Although specific details for implementing the present invention have been provided by describing preferred embodiments of the present invention above, the technical concept of the present invention is not limited to the described embodiments and can be embodied in various forms within the scope that does not deviate from the technical concept of the present invention. Explanation of the symbols

[0061] 10 : Casing 20 : 1st air knife 30 : 2nd Air Knife 40 : Suction part

Claims

Claim 1 A PCB cleaning device for removing particles from the surface of a PCB, comprising: a housing having an open side, the housing comprising an upper member having a curved surface formed on its lower surface capable of inducing a Coanda effect and an end member coupled to one lower surface of the upper member so as to protrude downward; a first air knife installed opposite the end member of the upper member to spray air toward the curved surface; a second air knife installed below the first air knife to spray air toward the PCB; and a suction part installed on the end member to suck in air sprayed from the first air knife and the second air knife; wherein the air sprayed from the first air knife flows along the curved surface formed on the lower surface of the upper member to induce a Coanda effect and moves to the suction part. Claim 2 The PCB cleaning device according to claim 1, wherein the second air knife is a hole type comprising a plurality of holes into which air is sprayed. Claim 3 A PCB cleaning device according to paragraph 2, further comprising a second driving means for vibrating the second air knife in the direction in which the hole is arranged. Claim 4 A PCB cleaning device according to any one of claims 1 to 3, wherein the first air knife is a hole type comprising a plurality of holes into which air is sprayed. Claim 5 A PCB cleaning device according to claim 4, further comprising a first driving means for vibrating the first air knife in the direction in which the hole is arranged. Claim 6 A PCB cleaning device according to paragraph 3, wherein the holes of the second air knife are circular and the spacing of the holes is equal to the diameter of the circle, and the amplitude of the second air knife by the second driving means is half the spacing of the holes. Claim 7 A PCB cleaning device according to claim 5, wherein the holes of the first air knife are circular and the spacing of the holes is equal to the diameter of the circle, and the amplitude of the first air knife by the first driving means is half the spacing of the holes. Claim 8 A PCB cleaning method for removing particles from the surface of a PCB, comprising: a step of providing a PCB cleaning device as described in claim 1; a step of placing the PCB below the housing and spraying air from a first air knife and a second air knife; and a step of sucking in the air sprayed from the first air knife and the second air knife by the suction part. Claim 9 A PCB cleaning method according to claim 8, wherein the second air knife is a hole type comprising a plurality of holes into which air is sprayed. Claim 10 A PCB cleaning method according to claim 9, further comprising a second driving means for vibrating the second air knife in the direction in which the hole is arranged, wherein air is sprayed while vibrating the second air knife during the spraying step. Claim 11 A PCB cleaning method according to any one of claims 8 to 10, wherein the first air knife is a hole type comprising a plurality of holes into which air is sprayed. Claim 12 A PCB cleaning method according to claim 11, further comprising a first driving means for vibrating the first air knife in the direction in which the hole is arranged, and spraying air while vibrating the second air knife in the spraying step. Claim 13 A PCB cleaning method according to claim 10, wherein the holes of the second air knife are circular and the spacing of the holes is equal to the diameter of the circle, and the amplitude of the second air knife by the second driving means is half the spacing of the holes. Claim 14 A PCB cleaning method according to claim 12, wherein the holes of the first air knife are circular and the spacing of the holes is equal to the diameter of the circle, and the amplitude of the first air knife by the first driving means is half the spacing of the holes.

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