KR100638659B1 - a rotary type barel coating apparatus - Google Patents

Abstract

The present invention relates to a rotary barrel plating apparatus used for plating chip parts.

The present invention includes a rotation support portion disposed to support the rotation of the barrel container between the barrel container and the side plate frame, wherein the rotation support portion is formed through the inner hole in which the cathode rod is inserted in the center of the body, the side plate frame A bushing shaft having a predetermined length to be mounted, and a bushing portion provided at the left and right sides of the barrel container and having a cover portion surrounding the tip portion of the bushing shaft inserted through the inner hole formed in the center of the barrel in the circumferential direction, are provided at the tip portion.

According to the present invention, the chip part is prevented from being caught between the bush supporting the rotation of the barrel container and the bushing shaft, thereby preventing plating defects and extending the service life, thereby reducing manufacturing costs.

Chip parts, barrel plating tank, barrel container, bush, bushing shaft, cover part, rotary support part

Description

Rotary Barrel Coating Apparatus {a rotary type barel coating apparatus}             

1 is a cross-sectional view of a general rotary barrel plating apparatus viewed from the front.

2 is a cross-sectional side view of a general rotary barrel plating apparatus.

Figure 3 is a block diagram showing a rotary barrel plating apparatus according to the present invention.

Figure 4 is an exploded perspective view of the rotary support portion employed in the rotary barrel plating apparatus according to the present invention.

Figure 5 is an exploded perspective view showing another embodiment of the rotary support portion employed in the rotary barrel plating apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

11: barrel plating tank 12: barrel container

13: rectifier 13a: cathode rod

13b: anode rod 14: drive motor

120: rotation support 121: bushing shaft

123,124 Inside hole 122: Bush

121a, 122a: Flange 125: Spacer

126: cover 126a: through hole

The present invention relates to a rotary barrel plating apparatus used for plating chip parts, and more particularly, to prevent chipping between the bushing shaft and the bushing supporting the rotation of the barrel container, thereby preventing plating defects and extending the service life. It relates to a rotary barrel plating apparatus to reduce the manufacturing cost by extending.

In general, the process of manufacturing chip components such as varistors, chip inductors, and multi-layer ceramic capacitors (MLCCs) includes: 1) uniformly reacting ceramic capacitor main raw material oil with additives as additives. 2) mix the synthesized ceramic raw material, polymer binder and solvent, 3) mature the mixed slurry in a stable state, and 4) coat the mature ceramic slurry with a certain thickness on the polymer film (PET). 5) The formed tape is dried by passing through a drying furnace, and 6) a silk screen is used to print the desired capacitance design value pattern to form internal electrodes. 7) Paste shape of the printed internal electrodes. In order to maintain the ceramic sheet is dried in a drying furnace, 8) the ceramic sheet is laminated in multiple layers to obtain the desired capacity value, 9) the laminated state 10) cutting the stacked ceramic bars into chips of a predetermined size, 11) debinding so that only binders included in the cut ceramic chips are removed, and 12) removing them. The binder-completed chip is fired by heat treatment in a high temperature electric furnace, 13) the fired chip is polished to handle sharp edges, and 14) an external electrode is formed outside the chip for connection with an internal electrode formed inside the chip. ) Heat-treat the chip where the internal and external electrodes are terminated and fix it on the ceramic surface.16) Nickel and tin plating is applied to the external surface of the chip to give solderability to the external electrode of the chip. Is screened by capacity deviation (J, K, M, Z), screened for insulation resistance (IR) defects, and 18) taped chip parts are taped and packaged to enable surface mounting.

In the process of manufacturing the chip components as described above, since the termination cannot be soldered immediately, nickel (Ni) and tin (Sn) are sequentially plated with the outermost electrode in order to smoothly solder. The plating method used is barrel plating.

The barrel plating is a method of plating a large amount of articles such as shapes and small chip parts at a time, and the barrel is immersed in the plating bath while the article and the articles are in contact with each other while friction polishing, so that the current is intermittently contacted with the rod of the cathode. It is a plating that causes a considerable luster to the product because it is plated.

1 is a cross-sectional view of the general rotary barrel plating apparatus from the front, Figure 2 is a cross-sectional view of the general rotary barrel plating apparatus from the side, the conventional barrel plating apparatus 10, as shown, a barrel plating tank filled with electrolyte (11), the barrel component 12 to be plated, and the chip component 1 and the medium 2 to be plated in the inner space to be immersed in the electrolyte of the barrel plating tank 11, and the barrel container 12 has a current. It is composed of a rectifier 13 for supplying the drive motor 14 for rotating the barrel container 12 in one direction.

In the barrel container 12 in which the chip component 1 and the medium 2 are mixed, a cathode support 13a extending from the rectifier 13 is provided on both left and right ends of the barrel container 12. A current is supplied through the medium 2 through the medium 20b, and the anode rod 13b extending from the rectifier 13 is immersed in the barrel plating tank 11. As the medium 2, steel balls having electrical conductivity are mainly used.

In addition, the structure in which the barrel container 12 is rotated in one direction by using the drive motor 14 as a driving source is provided at both left and right ends of the drive gear 15a and the barrel container 12 provided on the drive shaft of the drive motor 14. By engaging the driven gears 15b provided on either side of the rotational support portions 20a and 20b of each other, the barrel container 12 is rotated by the driving force of the drive motor 14, and the chip parts therein. (1) and the medium (2) are evenly mixed, so that the chip parts do not stick together.

The conventional rotary support 20a, 20b is provided with a hollow bushing shaft 23 that is a fixing member disposed on the left and right sides of the barrel container 12, the inner hole (on the outer surface of the bushing shaft 23) 21a) is provided with a bush 21 rotatably assembled, the bush 21 is integrally assembled to the left and right sides of the barrel container 12, through the inner hole (23a) of the bushing shaft (23) The cathode rod 13a is inserted into the barrel container 12.

In FIG. 1, reference numeral 25 denotes a spacer that maintains a gap between one side of the barrel container 12 and the side plate frame 18.

However, in the conventional rotary support 20a, 20b, each tip of the bushing 21 and the bushing shaft 23 assembled therein into the barrel container 12 in which the chip component 1 and the medium 2 are filled. While the barrel container 12 is exposed and rotated in one direction together with the driven gear 15b, the inner circumferential surface of the bushing 21, which is a rotation support member, wears while being rubbed and deteriorated in contact with the outer surface of the bushing shaft, which is a fixed support member. If the wear degree is excessively excessive, a gap is generated in the assembly portion of the bushing 21 and the bushing shaft 23.

In this case, as the chip part 1 or the medium 2 having a thin thickness is sandwiched between the gaps, a plating layer is formed in the chip part 1 or a plating defect is not formed properly, thereby resulting in product reliability. Is degraded.

Then, in the event of excessive wear of the bushing 21 and the bushing shaft 23, the plating operation is stopped, the barrel container 12 is completely disassembled from the side plate frame 18, and then the bushing 21 and the bushing shaft 23 ), But the work of replacing the bushing and the bushing shaft is very cumbersome, and excessive work time is required.

Therefore, the present invention has been made to solve the above problems, the object of which is to prevent the phenomenon of chip parts and media pinching the gap between the rotary support for supporting the rotation of the barrel container, to extend the service life of the rotary support To provide a rotary barrel plating device that can extend the replacement cycle.

As a technical means for achieving the above object, the present invention

A barrel plating tank filled with a predetermined amount of electrolyte, a barrel container immersed in the barrel plating tank, a chip part and a medium filled, a rectifier having a cathode rod and an anode rod to supply current to the barrel container and the electrolyte, and the barrel container in one direction. In a device for plating a chip component filled in the barrel container having a drive motor for providing a rotational driving force for driving the rotation and side plate frames arranged at predetermined intervals on the left and right sides of the barrel container, respectively,

It includes a rotation support portion disposed between the barrel container and the side plate frame to support the rotation of the barrel container,

The rotatable support part forms an inner hole through which the cathode rod is inserted in the center of the body, and a bushing shaft having a predetermined length mounted on the side plate frame, and an inner hole penetrated through the center of the body by being mounted on both sides of the barrel container. It provides a rotary barrel plating apparatus, characterized in that the bushing portion having a cover portion surrounding the tip portion of the inserted bushing shaft in the circumferential portion.

Preferably, the cover part is provided with a hollow disc plate assembled as a plurality of fastening members at the tip of the bush.

Preferably, the cover part penetrates through the center of the body a through hole having an inner diameter smaller than the outer diameter of the bushing shaft and larger than the outer diameter of the cathode rod.

Hereinafter, the present invention will be described in more detail.

Figure 3 is a block diagram showing a rotary barrel plating apparatus according to the present invention, Figure 4 is an exploded perspective view of the rotary support portion employed in the rotary barrel plating apparatus according to the present invention.

3 and 4, the barrel plating apparatus 100 of the present invention immerses the barrel container 12 in the barrel plating tank 11 filled with an electrolyte solution containing a metal component, and the barrel container 12 Supports the barrel container 12 rotated in one direction by the drive motor 14 during the operation of plating the chip parts 1 accommodated in the barrel container 12 while supplying current to the and electrolyte via the rectifier 13, respectively. The chip part 1 can be prevented from being caught between the bushing shaft 121 and the bushing 122, and the service life thereof can be extended.

The apparatus 100 is provided with a barrel plating tank 11, a barrel container 12, a rectifier 13, a drive motor 14, etc. having the same configuration as in the prior art, the same reference numerals are given to these, Detailed description thereof will be omitted below.

Rotating support portion 120 for supporting the one-way rotation of the barrel container 12 by the rotation drive source of the drive motor 14 is the left and right sides of the barrel container 12 immersed in the barrel plating tank 11, and Between the left and right sides of the barrel container 12 is provided between the side plate frame 18 which is disposed at a predetermined interval.

In addition, the rotation support part 120 is mounted to the bushing shaft 121 mounted on the side plate frame 18, which is a fixing member, and the barrel container 12, which is a rotating member rotatably assembled to the bushing shaft 121. It is composed of a bush (122).

That is, the bushing shaft 121 is a shaft member having a predetermined length penetrating the inner hole 123 of a predetermined size through the center of the body to insert the rod-shaped cathode rod 13a electrically connected to the rectifier. .

The bushing shaft 121 is inserted into the outer surface of the body through the guide hole (18a) formed through each lower end of the side plate frame 18, the body at the rear end to limit the insertion through the guide hole (18a) A flange 121a having an outer diameter larger than the outer diameter is integrally provided, and the flange 121a is in close contact with the outer surface of the side plate frame 18.

In addition, the front end of the bushing shaft 121 is inserted into the inner space of the barrel container 12 through the assembly holes 12a formed through the left and right sides of the barrel container 12 to be assembled with the bush 122.

The bush 122 is integrally provided on the left and right inner sides of the barrel container 12 to be rotated together with the barrel container 12 in accordance with the assembling holes 12a formed through the left and right sides of the barrel container 12. It is a rotating member.

The body of the bush 122 penetrates through the inner hole 124 of a predetermined size into which the bushing shaft 122 inserted through the assembly hole 12a is inserted, and at the rear end of the body, the inner surface of the left side of the barrel container. It is integrally provided with a flange (122a) having an outer diameter size larger than the outer diameter of the body to be in close contact with the contact.

In addition, the front end portion of the bush 122 to surround the one end portion of the bushing shaft 121 inserted through the inner hole 124 of the bush 122 in the circumferential direction to limit the insertion of the bushing shaft 121. The hollow cover part 126 is provided.

At this time, the cover part 126 has a through hole 126a having an inner diameter d smaller than the outer diameter d1 of the bushing shaft 121 and larger than the outer diameter d2 of the cathode rod 13a. Penetration in the center.

Accordingly, the boundary between the outer circumferential surface of the bushing shaft 121 and the inner circumferential surface of the bush 122 is formed in the inner space of the barrel container 12 by the cover part 126 provided at the tip of the bush 122. It is enclosed in the circumferential direction so as not to come into contact with the chip component 1 and the medium 2 filled therein without being exposed.

On the other hand, the negative electrode rod 12a inserted through the inner hole 123 of the bushing shaft 121 passes without contact with the through hole 126a of the cover portion 126 to allow the barrel container 12 to be opened. It is located in the interior space.

Here, the cover part 126 surrounding the tip portion of the bushing shaft 121 to surround the boundary between the bushing shaft 121 and the bush 122 may be integrally formed at the tip of the bush 122. However, as shown in FIG. 5, the front end of the bush 122 may be assembled and replaced as a plurality of fastening members, and may be provided as a disc plate through which a through hole of a predetermined size is formed.

In addition, a spacer 125 is assembled between the one side (right side in the drawing) of the barrel container 12 and the side plate frame 18 so that the bushing shaft 121 is assembled to maintain a constant gap therebetween.

The plating of nickel (Ni) and tin (Sn) on the outer surface of the chip component (1) in which the internal and external electrodes are formed using the apparatus 100 of the present invention having the above-described configuration is first performed in a predetermined size of inner space To disassemble the door (not shown) provided on the outer surface of the barrel container having a (12) is filled with the medium (2), the steel sphere with the chip component (1) to be plated.

The rectifier 13 and the driving motor 14 are lowered from the upper portion of the barrel plating tank 11 in which the door is reassembled to the lower portion of the barrel plating tank 11 containing the electrolyte and immersed in the electrolyte. When an external power source is applied to the barrel, the cathode and anode currents are respectively supplied to the barrel container 12 and the electrolyte through the cathode rods 13a and the anode rods 13b of the rectifier 13, and the drive motor 14 By the drive source of the barrel container 12 is rotated in one direction, the electroplating is made to the chip component (1).

The barrel container 12 is rotated by the rotation support part 120 provided between the barrel container 12 and the side plate frames 18 disposed on the left and right sides thereof, and the side plate frame 18 which is a fixing member. Since the inner circumferential surface of the barrel 122, which is a rotating member, and the bush 122, which are assembled to the outer surface of the bushing shaft 121 to be assembled are rotatably inserted, the barrel container 12 with the bushing shaft as the center of rotation. Rotation is made smoothly.

In addition, the boundary portion between the bushing shaft 121 and the bush 122 positioned in the inner space of the barrel container 12 is externally provided by cover parts 127 provided at each tip of the bush 122. Since it is wrapped in the circumferential direction so as not to be exposed, the small-size chip component 1 or the medium 2 to be plated while rotating with the barrel container 12 is formed between the bushing shaft 121 and the bush 122. It is possible to fundamentally prevent the phenomenon of being pinched and to perform plating work stably.

According to the present invention as described above, by having a cover portion circumferentially surrounding the boundary between them in the front end of the bush assembled with the bushing shaft of the rotary support provided between the barrel container and the side plate frame of the rotating member Since the boundary between the bushing shaft and the bushing is not exposed to the inner space of the barrel container, gaps are generated due to wear between the bushing shaft and the bushing, and small chip parts are prevented from being caught by the gaps generated. As a result, plating performance of the chip component may be prevented by improving plating performance.

In addition, since the replacement life can be extended by extending the service life of the rotary support, the production cost of the needle parts can be reduced, and the replacement cycle of the parts can be reduced, thereby improving work productivity.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to clarify that knowledge is easy to know.

Claims (3)

A barrel plating tank filled with an electrolyte, a barrel container immersed in the barrel plating tank, a chip part and a medium filled, a rectifier having a cathode rod and an anode rod to supply current to the barrel container and the electrolyte, and the barrel container in one direction. In the device for plating a chip component filled in the barrel container having a drive motor for providing a rotational driving force for rotation driving and side plate frames disposed on the left and right sides of the barrel container, respectively, It includes a rotation support portion disposed between the barrel container and the side plate frame to support the rotation of the barrel container, The rotatable support part forms an inner hole through which the cathode rod is inserted in the center of the body, a bushing shaft mounted on the side plate frame, and a bush inserted through the inner hole formed in the left and right sides of the barrel container and penetrated through the center of the body. Rotating barrel plating apparatus comprising a bush having a cover portion surrounding the tip portion of the shaft in the circumferential direction. The method of claim 1, The cover part is a rotary barrel plating device, characterized in that provided with a hollow disc plate assembled as a plurality of fastening members at the tip of the bush. The method according to claim 1 or 2, And the cover part forms a through hole in the center of the body, the through hole having an inner diameter smaller than the outer diameter of the bushing shaft and larger than the outer diameter of the cathode rod.

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