KR100616547B1 - Electroplating Cell Apparatus for Small Parts - Google Patents

Abstract

The present invention relates to a cell plating apparatus for plating small parts, the anode serving as an anode; A cathode which acts as a cathode and has a cell for receiving a plated body and a plating liquid; A hollow member of a flat side light consisting of a flange portion, a side surface, and a curved portion, which is a flat surface, comprising: a canopy having a plurality of plating liquid discharge holes through which a plating liquid flows out on the curved surface; A sealing ring for sealing a flange portion of the canopy and an upper surface of the cathode; A power supply unit supplying a pulse current for performing plating by using the anode and the cathode as two poles; And a motor for rotating the cathode and the canopy associated therewith. It provides a cell plating apparatus comprising a.

According to the present invention, while the plating solution flows out smoothly during the cell plating process of the small parts, the small parts are prevented from being lost to the plating liquid outlet or the plating liquid outlet, and the cost of replacing the consumables can be reduced. .

Cell plating, cathode, anode, canopy, small parts, plating solution discharge

Description

Electroplating Cell Apparatus for Small Parts}             

1 is a cross-sectional view of the center portion of a conventional cell plating apparatus for plating small parts.

FIG. 2 is an exploded perspective view showing some components of the conventional cell plating apparatus of FIG.

3 is a cross-sectional view of the central portion of a cell plating apparatus for plating small parts according to the present invention.

4 is an exploded perspective view illustrating some parts of the cell plating apparatus of FIG. 3.

Fig. 5 is a cross sectional view of the central portion of the canopy showing the shape and position of the plating liquid discharge hole according to the present invention.

The present invention relates to an apparatus for plating small parts, and more particularly, to a cell plating apparatus for preventing the plated body from being lost to the drain groove or blocking the drain groove during the cell plating process of the small part. will be.

In general, small chip components such as chip resistors, multilayer ceramic capacitors (MLCCs), chip inductors, etc. are mounted on a printed circuit board by soldering external electrodes. The external electrode of such a small chip component is formed of silver paste or copper paste. In order to improve soldering of the small chip component to a printed circuit board, nickel (Sn) or tin-lead (Sn-) is applied to the external electrode after nickel plating. The process of plating Pb) is performed. In addition, a plating process of a different type from the above may be used for the electrode or the plated metal, etc., for plating small parts.

As such, the plating method used for plating small parts includes a barrel plating method, a cell plating method, and the like.

Among these, the cell plating method does not use media (intermediate) compared to the barrel plating method, the cost is reduced, there is no need to separate the plated body and inclusions, it is possible to improve the work lead time, the size of the equipment There is an advantage that the plating operation is possible even in a small space, the present specification will look at the cell plating method for the plating of small parts.

1 is a cross-sectional view of a central portion of a conventional cell plating apparatus for plating small parts, and FIG. 2 is a perspective view showing some components of the conventional cell plating apparatus of FIG.

As shown in FIGS. 1 and 2, the cell plating apparatus includes an anode 10, a canopy 20, a canopy fixing ring 30, and a tapron gasket 40. , Cathode 50. It is composed of a power supply unit 60 and a motor (not shown).

On the bottom of the conventional canopy 20, a plurality of liquid draining grooves 21 are formed radially for discharging the plating liquid, and the cathode 50 is a cell capable of accommodating the plating body and the plating liquid. (51) is provided.

In addition, the power supply unit 60 supplies a pulse current for plating by using the anode 10 and the cathode 50 as two poles, and the motor (not shown) repeats the forward and reverse rotations of the cathode. Rotate

On the other hand, the cathode 50 is coupled to the canopy 20 by a connecting means such as a bolt / nut through a fastening hole 25 formed in the canopy, the cathode, etc. after receiving the plated body (11). At this time, the teflon gasket 40 is mounted therebetween for sealing the cathode and the canopy.

In addition, the canopy fixing ring 30 which maintains the shape of the teflon gasket in order to prevent the teflon gasket 40 from being compressed by the dripping groove 21 of the canopy and blocking the dripping groove 21. ) Is additionally requested.

The operation of the conventional cell plating apparatus having the configuration as described above is as follows.

After the plated body 11 is accommodated in the cathode 50 and the cathode and the canopy are combined, the plating operation is performed.

 As shown in FIG. 1, when the plating solution 12 is supplied from the anode 10 side, the cathode is rotated by a motor mounted below the cathode 50, and the plated body 11 is subjected to centrifugal force. It is attached to the cathode and plated.

While the plating operation is performed, the plating liquid continues to flow in, and the plating liquid flows out through the liquid draining groove 21 formed in the bottom surface of the canopy 20 by centrifugal force caused by the rotation of the cathode 50.

In the case of plating a general component, the plating liquid leakage process is not a problem since the size of the plated body is relatively large compared to the liquid draining groove 21.

However, as the size of parts has been miniaturized due to the development of technology, plating of small parts such as a multilayer ceramic capacitor (MLCC) of 0.6 mm x 0.3 mm or less is required. In the case of plating by using, the small to-be-plated body is lost through the liquid draining groove 21 or the plated body is caught in the liquid draining groove.

In particular, when the plated body is caught around the liquid draining groove 21, the plated body prevents the outflow of the plating liquid, and the canopy fixing ring 30 and the teflon gasket 40 cause corrosion and deformation. The problem arises that the Teflon gasket needs to be replaced.

Furthermore, in the process of collecting the plated body by separating the cathode and the canopy, there is a problem in that good and bad products are mixed.

Therefore, in the case of small parts, the plated body is lost as described above, or the plated body is stuck in the liquid draining groove to prevent the leakage of the plating solution, and the problem is that the defective plating material stuck in the liquid draining groove is mixed with the good to be coated. Therefore, a method for enabling cell plating of small parts should be sought.

The present invention is to solve the above problems, the cell for preventing the outflow of the plating solution by preventing the leakage of the plating liquid during the plating process of the small parts smoothly while the small parts are lost or drained into the liquid drain groove. It is an object to provide a plating apparatus.

In addition, an object of the present invention is to provide a cell plating apparatus for preventing the canopy retaining ring and the teflon gasket from corroding and deforming and failing to completely seal the cathode and the canopy, and preventing the replacement of the canopy retaining ring and the teflon gasket.

In order to achieve the above object, the present invention provides a cell plating apparatus for plating small parts, the anode serving as an anode; A cathode which acts as a cathode and has a cell for receiving a plated body and a plating liquid; A hollow member of a flat side light consisting of a flange portion, a side surface, and a curved portion, which is a flat surface, comprising: a canopy having a plurality of plating liquid discharge holes through which a plating liquid flows out on the curved surface; A sealing ring for sealing a flange portion of the canopy and an upper surface of the cathode; A power supply unit supplying a pulse current for performing plating by using the anode and the cathode as two poles; And a motor for rotating the cathode and the canopy associated therewith. It provides a cell plating apparatus comprising a.

Preferably, the sealing ring is in close contact with the flange portion of the canopy and the upper surface of the cathode at a position outside the curved portion of the canopy, the size of the inner diameter hole of the sealing ring and the size of the inner diameter of the cathode upper surface It is equal to, and provides a cell plating apparatus characterized in that it is greater than or equal to the size of the inner diameter of the flange portion of the canopy.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

3 is a cross-sectional view of a central portion of a cell plating apparatus for plating small parts according to the present invention, and FIG. 4 is a perspective view showing a part of the cell plating apparatus of FIG.

3 and 4, the cell plating apparatus according to the present invention includes an anode 110, a canopy 120, a sealing ring 130, a cathode 150, a power source. Supply unit 160 and a motor (not shown).

The anode 110 and the cathode 150 serve as an anode and a cathode for cell plating, respectively, and the power supply unit 160 supplies a pulse current to perform plating using the anode and the cathode as two poles. Do it.

The cathode 150 has a cell 151 for receiving the plated body and the plating liquid as shown in FIG. 3, and the upper surface 152 of the cathode is connected to the canopy 120 by a sealing ring 130. Close contact. At this time, the cathode 150 may be composed of a hollow cathode ring (cathode ring) and the bottom of the cathode ring to seal the plating solution and the plated body, the bottom is to be formed of an insulating material Can be.

As shown in FIGS. 3 and 4, the canopy 120 has a shape of upper and lower light as a whole, and includes a flange portion 121 which is a bottom surface, a curved portion 122 which is a part of a side surface and a side surface. . The flange portion 121 is a flat surface connected to the upper surface 152 of the cathode through a sealing ring 130, the curved portion 122 connects the side surface and the flange portion in a gentle curved surface. In addition, the curved portion 122 is formed with a plurality of plating liquid discharge holes 123 to allow the plating liquid to flow out.

On the other hand, the sealing ring 130 is in close contact with the flange portion 121 of the canopy and the upper surface 152 of the cathode through the fastening hole 125 formed in the canopy, cathode, etc. using a fastening means such as bolts / nuts. It performs the function.

In addition, the motor (not shown) rotates the cathode 150 and the canopy 120 connected thereto by repeating the forward rotation and the reverse rotation.

Preferably, as shown in FIG. 4, the sealing ring 130 closely contacts the flange portion 121 of the canopy and the upper surface 152 of the cathode at a position beyond the curved portion 122 of the canopy. The size of the inner diameter hole 131 of the sealing ring is equal to the size of the inner diameter hole 153 of the cathode upper surface, and is greater than or equal to the size of the inner diameter 124 of the flange portion of the canopy.

This is to prevent the plated body from being caught in the connection between the canopy 120, the sealing ring 130, and the cathode 150, and the inner diameter side connection portion of the upper surface 151 of the canopy and the sealing ring 130 is illustrated in FIG. 3. Like the "A" of the part is made of a smooth shape without irregularities.

At this time, the inner diameter hole 153 portion of the upper surface 152 of the cathode has a shape that does not chamfer or form a round.

By adopting such a shape, the plated body is prevented from being caught between the cathode upper surface 152 and the sealing ring 130 and between the sealing ring 130 and the canopy flange portion 121.

Therefore, corrosion and deformation of the sealing ring can be prevented, and the replacement cost can be reduced.

In particular, when the inner diameter hole 131 of the sealing ring is larger than the inner diameter 124 of the flange portion 121 of the canopy, the plated body 101 reaches the curved portion 122 of the canopy as shown in FIG. Since the shape is previously caught on the jaw, there is an effect that can prevent the loss of the plated body through the plating liquid discharge hole.

5 is a cross sectional view of the central portion of the canopy showing the shape and position of the plating liquid discharge hole.

Preferably, the canopy 120 has a plurality of plating liquid discharge holes 123 formed at a predetermined height h or h 'within 5 mm from the upper surface of the flange portion 121 as shown in FIG. 5A or 5B. Can be.

This is because when the height of the plating liquid discharge hole is 5 mm or more, it is difficult to discharge the plating liquid by centrifugal force, and in particular, the space in which the plating liquid cannot be completely discharged is enlarged as in the "A" part of FIG.

Also preferably, the canopy 120 may have a plating liquid discharge hole formed parallel to the canopy flange portion as shown in FIG. 5 (a), and perpendicular to the curved portion of the canopy as shown in FIG. 5 (b). It may have a plurality of plating liquid discharge holes formed.

At this time, the height h of the discharge hole in Fig. 5 (a) is the height from the top surface of the flange portion to the hole center line, and the height h 'of the discharge hole in Fig. 5 (b) is the hole center line from the top surface of the flange portion. It is the height to the point where the outer surface of the canopy meets.

However, even when holes having the same diameter are formed in the canopy, when the plating liquid discharge holes are formed in an inclined direction with respect to the canopy curved portion 122 (that is, in a direction parallel to the canopy flange portion) as shown in Fig. 5A, the hole inside the canopy This ellipsoidal shape increases the size of the holes, increasing the likelihood of loss of the plated body. Therefore, it is preferable to make the size of the plating liquid discharge hole of FIG. 5 (a) slightly smaller than that of FIG. 5 (b).

Further, the size of the plating liquid discharge hole is preferably 1 to 10 times the size of the plated body. This is because if the size of the plating liquid discharge hole is too small, it is difficult to leak the plating liquid even if a plurality of holes are drilled.

The operation of the present invention having the configuration as described above will be described with reference to Figs.

First, in order to plate a small component (plating body), the plating body is placed in the cell 151 of the cathode 150, and the cathode 150, the canopy 120, and the sealing ring 130 are bolted / nut, etc. Through the fastening means of the coupling.

When the plating solution 102 is supplied from the anode 110, the cathode is rotated by a motor (not shown) mounted below the cathode 150, and the plated body 101 is attached to the cathode by centrifugal force. The plating of the plated body is performed by a pulse current supplied from the power supply unit 160 to the anode and the cathode.

When the cathode 150 rotates only in one direction, since the plated body is plated and sticks to the cathode, the cathode 150 repeats the forward and reverse rotation by the rotation of the motor. Is collected on the circumferential surface of the cathode and exported to the center.

Meanwhile, while the plating operation is performed, the plating liquid is continuously introduced from the anode 110, and the plating liquid 102 opens the plating liquid discharge hole 123 formed in the curved portion 122 of the canopy by centrifugal force caused by the rotation of the cathode. Outflow.

In the case of the prior art shown in FIG. 1, not only the plating liquid but also a small size of the plated body is lost through the liquid draining groove 21 in this process, and the liquid draining groove is blocked to limit the discharge of the plating liquid.

That is, in the related art, the liquid draining groove 21 of FIG. 1 is formed not only at the largest radius where the centrifugal force acts, but also at the position where the target body can be concentrated. Or a phenomenon in which the plated body blocks the liquid drain groove.

 However, according to the present invention, since the plating liquid discharge hole 123 is formed slightly above the flange portion of the canopy as shown in Fig. 3, the hole is formed where the centrifugal force is smaller than in the prior art. Since the plating liquid discharge hole is formed in the curved portion 122, the possibility of the plated body being lost is extremely low.

In particular, as described above, when the inner diameter hole 131 of the sealing ring is larger than the inner diameter 124 of the flange portion 121 of the canopy, the plated body 101 may have the curved portion 122 of the canopy as shown in FIG. 3. Since the shape is caught by the jaw before reaching), the possibility of loss of the plated body through the plating liquid discharge hole is further lowered.

As described above, according to the present invention, the loss of the plated body can be prevented, and the plated body can prevent the phenomenon of preventing the plating liquid from leaking by blocking the plating liquid discharge hole.

In particular, in the related art, the plated body adheres to the liquid draining groove 21 of FIG. 1 to hinder the outflow of the plating liquid, and the corrosion and deformation of the canopy fixing ring 30 and the teflon gasket 40 have been caused. According to the present invention, there is no phenomenon in which the plated body is caught in a liquid draining groove, and the like, so that the conventional problem can be solved.

On the other hand, when one plating process is finished, a subsequent process such as a washing process or another plating process is followed, and in order to perform the post process, the plating liquid or the washing liquid inside the cell 151 must be completely discharged through the plating liquid discharge hole. do.

This liquid discharge process is performed by the action of centrifugal force due to the rotation of the cathode.

In the case of the present invention, although the plating liquid discharge hole 123 is formed slightly above the flange portion 121, the liquid is discharged to the same level as the conventional cell plating apparatus, so there is a fear of contamination by the remaining liquid in the subsequent process. There is no.

In particular, when the plating process is completely completed, a number of defective plated bodies stuck in the connection portion of the canopy and the cathode in the process of collecting the plated body after the separation of the canopy and the cathode are mixed with a high quality plated body.

However, according to the present invention, the phenomenon in which the plated body is caught in a part of the plating apparatus does not occur as described above, so that only a high quality plated body can be obtained.

As described above, according to the present invention, while the outflow of the plating liquid is smooth during the cell plating process of the small parts, there is an effect of preventing the small parts from being lost to the plating liquid outlet or blocking the plating liquid outlet, thereby stably plating the small parts. There is an effect that the processing can be performed.

In addition, there is no phenomenon that the plated body is caught in liquid draining grooves, thereby reducing the cost of replacing consumables such as sealing rings, and there is no risk of poor plated plated bodies being mixed during the collection process. Which has a beneficial effect.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as set forth in the claims below. I want to make it clear.

Claims (6)

In the cell plating apparatus for plating small parts, An anode serving as an anode; A cathode which acts as a cathode and has a cell for receiving a plated body and a plating liquid; A hollow member of a flat side light consisting of a flange portion, a side surface, and a curved portion, which is a flat surface, comprising: a canopy having a plurality of plating liquid discharge holes through which a plating liquid flows out on the curved surface; A sealing ring for sealing a flange portion of the canopy and an upper surface of the cathode; A power supply unit supplying a pulse current for performing plating by using the anode and the cathode as two poles; And A motor for rotating the cathode and the canopy associated therewith; Cell plating apparatus comprising a. The method of claim 1, The sealing ring is in close contact with the flange portion of the canopy and the upper surface of the cathode in a position outside the curved portion of the canopy, The inner diameter hole of the sealing ring is the size of the inner diameter of the cathode upper surface, the cell plating apparatus, characterized in that greater than or equal to the size of the inner diameter of the flange portion of the canopy. The method according to claim 1 or 2, And the canopy has a plurality of plating liquid discharge holes formed in a direction parallel to the flange portion of the canopy. The method according to claim 1 or 2, And the canopy has a plurality of plating liquid discharge holes formed in a direction perpendicular to the curved portion of the canopy. The method of claim 3, And the canopy has a plurality of plating liquid discharge holes formed at a point where the height h from the upper surface of the flange portion to the hole center line is within 5 mm. The method of claim 4, wherein And the canopy has a plurality of plating liquid discharge holes formed at a point where the height h 'from the upper surface of the flange portion to the point where the hole center line meets the outer surface of the canopy is within 5 mm.

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