WO2011049086A1

WO2011049086A1 - Barrel plating device

Info

Publication number: WO2011049086A1
Application number: PCT/JP2010/068386
Authority: WO
Inventors: 学井上; 忠寛大沼; 俊樹猪股; 勉宮寺
Original assignee: ディップソール株式会社; 本田技研工業株式会社
Priority date: 2009-10-19
Filing date: 2010-10-19
Publication date: 2011-04-28
Also published as: JP2011084797A; JP5581522B2

Abstract

A barrel plating device capable of providing a satisfactory plating film irrespective of the quantity of objects to be plated. A barrel plating device (1) comprises: a barrel (4) which contains therein objects to be plated and has a negative electrode provided to the inner wall surface of the barrel; a positive electrode (6) which is disposed within the barrel; a barrel driving section (8) which rotates, rocks, or vibrates the barrel; and a positive electrode driving section (10) which rotates, rocks, or vibrates the positive electrode.

Description

Barrel plating equipment

The present invention relates to a barrel plating apparatus, and more particularly to a barrel plating apparatus that can be used for electroplating small parts such as bolts and screws.

Japanese Patent Laid-Open No. 49-130 (Patent Document 1) describes a barrel rotation support method and apparatus in a plating tank. The plating apparatus described here includes a barrel that accommodates an object to be plated, a cathode that is inserted into the barrel and is in contact with the object to be plated, and an anode that is disposed outside the barrel.
Japanese Patent Laying-Open No. 2006-312759 (Patent Document 2) describes a barrel plating apparatus for electrolytic chromium plating. In this barrel plating apparatus, the barrel portion of the barrel container is formed of metal, and this barrel portion constitutes the cathode electrode. Further, an anode electrode is inserted and fixed in the axial center portion of the barrel container.

JP-A-49-130 JP 2006-312759 A

In the barrel plating apparatus described in Japanese Patent Laid-Open No. 49-130, the cathode inserted into the barrel is in contact with the object to be plated so that each object to be plated has a cathode potential. When the number of objects to be plated is small, there is a problem in that contact between the cathode and the objects to be plated or contact between the objects to be plated is not sufficiently ensured, and electric conduction failure tends to occur. If even one of a large number of plated objects causes a failure in energization, a bipolar phenomenon occurs and a good plating film cannot be obtained. In addition, when there are many objects to be plated, the total amount of current required for plating increases, and the bath voltage also increases, so this current flows from the anode outside the barrel through the hole provided in the wall of the barrel. Therefore, there is a problem that current concentrates there and abnormal plating metal deposition called scoring occurs.

Further, in the apparatus described in Japanese Patent Application Laid-Open No. 2006-312759, since the inner wall surface of the barrel is a cathode, it is difficult to cause a conduction failure even when the number of objects to be plated is small. However, when the number of objects to be plated is large, the bath voltage becomes high, and there is a problem that “burning” is likely to occur.

Therefore, an object of the present invention is to provide a barrel plating apparatus capable of obtaining a good plating film regardless of the amount of an object to be plated.

In order to solve the above-described problems, the present invention is a barrel plating apparatus that accommodates an object to be plated, a barrel having an inner wall provided with a cathode, and an anode disposed in the barrel. And a barrel driving unit that rotates, swings, or vibrates the barrel, and an anode driving unit that rotates, swings, or vibrates the anode.

In the present invention configured as described above, the object to be plated accommodated in the barrel is electrically connected to the cathode provided on the inner wall surface of the barrel. The barrel is rotated, rocked, or vibrated by a barrel drive. The anode is disposed in the barrel and is rotated, rocked, or vibrated by the anode driving unit.

According to the present invention configured as described above, since the cathode is provided on the inner wall surface of the barrel, the conduction between the object to be plated and the cathode is reliably ensured, and the anode is disposed in the barrel. Since it is rotated, oscillated, or oscillated by the drive unit, an excessive increase in bath voltage can be prevented. Thereby, regardless of the amount of the object to be plated, a good plating film can be obtained.

In the present invention, preferably, the anode further has an anode electrical contact for energizing the anode while allowing the anode to rotate, swing or vibrate, and the anode electrical contact is immersed in the plating solution.

According to the present invention configured as described above, the anode electrical contact that allows rotation, oscillation, or vibration of the anode can be immersed in the plating solution, so that the entire configuration of the barrel plating apparatus can be simplified. can do.

In the present invention, preferably, the contact portion of the anode electrical contact is made of aluminum on the movable side connected to the anode, and the fixed side in contact with the anode is made of a corrosion-resistant metal material.
According to the present invention thus configured, even when the contact portion of the anode electrical contact is immersed in the plating solution, the contact resistance of the contact can be kept low.

In the present invention, the corrosion-resistant metal material on the anode fixing side is preferably titanium or a titanium alloy.
In the present invention, preferably, the anode has a cylindrical or columnar shape.
According to the present invention configured as described above, the anode can be easily formed.

In the present invention, preferably, the anode has irregularities formed on the surface thereof.
According to the present invention configured as described above, an excessive increase in the bath voltage can be further suppressed.

In the present invention, the anode is preferably an insoluble anode or a soluble anode.
In the present invention, the anode is preferably one in which a replaceable soluble anode material or insoluble anode material is attached to a plastic and / or metal hollow cylindrical surface.
In the present invention, preferably, the cathode is formed of a conductive material.

In the present invention, preferably, the cathode is made of copper, gold, iron, nickel, stainless steel, aluminum, titanium, carbon, or conductive resin.

In the present invention, preferably, a plurality of holes are formed in the barrel and the cathode provided on the inner wall surface, and the plating solution flows in or out through these holes.
According to the present invention thus configured, the object to be plated can be immersed in the plating solution by immersing the barrel in the plating solution tank.
In the present invention, preferably, the barrel is capable of forcibly circulating the plating solution in the barrel with a separately provided plating solution tank.

In the present invention, preferably, the cathode provided on the inner wall surface of the barrel covers the entire inner wall surface of the barrel.
According to the present invention configured as described above, conduction between the object to be plated and the cathode can be made more reliable.

In this invention, Preferably, it has a triangular-column-shaped mountain-shaped baffle plate further arrange | positioned in a barrel and mixing the to-be-plated object in a barrel.
According to the present invention configured as described above, the objects to be plated in the barrel can be mixed more effectively, so that the formed plating layer can be made more uniform.

In the present invention, the barrel is preferably made of polyvinyl chloride, polypropylene, or Teflon (registered trademark).
In the present invention, it is preferable to further include a pulse power supply unit that applies a pulsed voltage between the cathode and the anode.

According to the barrel plating apparatus of the present invention, electroplating of various metals such as aluminum, aluminum alloy, zinc, zinc alloy, chromium, tin alloy, nickel, nickel alloy, etc. can be performed regardless of the amount of the object to be plated. It is possible to obtain a uniform and dense plating film free of rust and burns.

1 is a front view of a barrel plating apparatus according to a first embodiment of the present invention. It is a left view of the barrel plating apparatus by 1st Embodiment of this invention. It is a right view of the barrel plating apparatus by 1st Embodiment of this invention. It is sectional drawing of a barrel. It is a figure which shows the mechanism of the anode electrical contact which provides a positive voltage to an anode. It is sectional drawing which shows typically the structure of the barrel plating apparatus by 2nd Embodiment of this invention.

Next, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
First, a barrel plating apparatus according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view of a barrel plating apparatus according to the present embodiment, FIG. 2 is a left side view, and FIG. 3 is a right side view. FIG. 4 is a cross-sectional view of the barrel. FIG. 5 is a diagram showing a mechanism of an anode electrical contact for applying a positive voltage to the anode.

As shown in FIGS. 1 to 3, a barrel plating apparatus 1 according to the present embodiment includes two

frame plates

2a and 2b, and a barrel 4 supported so as to be swingable with respect to the frame plates and provided with a cathode. Between the anode 6 disposed on the central axis on which the barrel 4 swings, the barrel driving motor 8 serving as the barrel driving unit, the anode driving motor 10 serving as the anode driving unit, and the cathode and the anode 6. And a power supply unit 11 for applying a voltage.

The barrel plating apparatus 1 of this embodiment is an aluminum barrel plating apparatus using a soluble anode made of aluminum. This apparatus accommodates small articles such as bolts and screws in a barrel 4 and immerses the barrel plating apparatus 1 in a plating solution in a plating solution tank to a predetermined position. Next, while starting the anode driving motor 10 and rotating the anode 6, the barrel 4 is swung at a predetermined cycle, and a current is passed between the anode 6 and the cathode provided on the barrel 4, thereby The small article in 4 is plated with aluminum.

In the present embodiment, the power supply unit 11 is a pulse power supply unit that applies a pulsed voltage between the cathode and the anode 6.
The

frame plates

2a and 2b are two flat plates formed of an insulator, and are connected in parallel by three connecting

rods

2c, 2d, and 2e. The

frame plates

2a and 2b are provided with bearings for supporting the barrel 4 so as to be swingable between them. In the present embodiment, the

frame plates

2a and 2b are made of Teflon (registered trademark).

As shown in FIG. 4, the barrel 4 includes two large-diameter barrel gears 12 disposed at both ends, a thin metal plate 14 disposed so as to connect these, a positive electrode cover 16, and a negative terminal 18. And baffle plate 20.

The thin plate 14 is bent into a concave shape to form a barrel having a half octagonal cross section, and an object to be plated (not shown) is accommodated inside this. In this embodiment, the thin plate 14 is an aluminum plate provided with a large number of small holes, and its inner surface functions as a cathode provided on the inner wall surface. In use, the plating solution flows in or out through many small holes in the thin plate 14.

In the present embodiment, the cathode is formed by forming the barrel itself from a conductive material. However, as a modification, the barrel is formed of an insulator such as polyvinyl chloride, polypropylene, or Teflon (registered trademark). A conductive cathode plate may be attached to the inner wall surface of the barrel. Further, in the present embodiment, the thin plate 14 is made of aluminum, but the barrel 4 may be made of copper, gold, iron, nickel, stainless steel, titanium, carbon, or conductive resin as another metal. .

The anode cover 16 is formed of five plate-like members, and is disposed so as to cover the generally lower half of the anode 6 disposed in the barrel 4. The anode cover 16 prevents accidental contact of the object to be plated with the anode 6 when the number of objects to be plated is large. A large number of small holes are formed in the anode cover 16, and a current flows from the anode to the object to be plated through these small holes. In the present embodiment, the anode cover 16 is made of Teflon (registered trademark).

The cathode terminal 18 is an elongated metal plate extending from both sides of the thin plate 14, and is connected to the negative terminal of the power supply unit 11 (FIG. 1).
The baffle plate 20 is a prismatic member disposed at the corner of the folded thin plate 14, and the baffle plate 20 forms a triangular cross-section mountain inside the barrel 4. The baffle plate 20 forms a mountain on the inside of the barrel 4 so that the object to be plated is well mixed when the barrel 4 is swung.

As shown in FIGS. 1 to 3, the anode 6 is a stepped shaft-like aluminum cylinder having a small diameter at both ends, and both ends extend through the

frame plates

2a and 2b. ing. Thereby, the anode 6 is supported rotatably with respect to the

frame plates

2a and 2b. An anode driving gear 22 is attached to one step of the anode 6. As a modification, the anode 6 may be formed hollow and cylindrical. Moreover, the anode 6 can also be comprised by attaching the soluble or insoluble anode material to the surface of the hollow cylinder formed with the plastic and / or metal so that replacement | exchange is possible. Preferably, dimple-like irregularities of the golf ball are formed on the surface of the anode 6.

As shown in FIG. 3, the anode driving motor 10 disposed on the upper portion of the barrel plating apparatus 1 rotates and drives the anode driving gear 22 through

transmission gears

24a, 24b, and 24c attached to the frame plate 2b. To do. Thereby, the anode 6 is rotationally driven.

On the other hand, as shown in FIG. 2, the barrel driving motor 8 arranged at the upper part of the barrel plating apparatus 1 drives the barrel gear 12 via transmission gears 26a and 26b attached to the frame plate 2a. Further, the barrel gear 12 is provided with

protrusions

12a and 12b. When the barrel gear 12 rotates about the anode 6, the

protrusions

12a and 12b are moved, and thereby the rod 28 rotatably attached to the frame plate 2a is rotated. The tip of the rotated rod 28 switches the

microswitches

30a and 30b arranged on both sides thereof on or off. That is, in FIG. 2, when the barrel gear 12 is rotated counterclockwise, the protrusion 12a pushes the lower end portion of the rod 28 leftward, and the rod 28 is rotated clockwise. As a result, the upper end of the rod 28 pushes the micro switch 30a to turn it on. When the micro switch 30a is turned on, the rotation of the barrel driving motor 8 is reversed, and the barrel gear 12 is rotated clockwise.

When the barrel gear 12 is rotated clockwise, the protrusion 12b pushes the lower end of the rod 28 to the right, and the rod 28 is rotated counterclockwise. As a result, the upper end of the rod 28 pushes the micro switch 30b to turn it on. When the micro switch 30b is turned on, the rotation of the barrel driving motor 8 is reversed, and the barrel gear 12 is rotated counterclockwise again. By repeating the above operation, the barrel 4 is swung over an angular range of about 90 °.

Next, the configuration of the anode electrical contact portion will be described with reference to FIG.
As shown in FIG. 5, the anode electrical contact portion includes a rod-like anode terminal 32, a coil spring 34 that urges the anode terminal 32, and a fixed-side contact member 36 that is a fixed-side member that contacts the anode 6. And an insulating sleeve 38 through which the anode terminal 32 passes, and a spring adjustment bolt 40 for adjusting the urging force of the coil spring 34. In use, the anode electrical contact portion is immersed in the plating solution, and the anode 6 is slid with respect to the stationary contact member 36.

The anode terminal 32 is a stepped aluminum shaft having a thin upper portion, and the upper end thereof is connected to the plus terminal of the power supply unit 11, and the fixed contact member 36 is attached to the lower end. The thinned upper portion of the anode terminal 32 is passed through the coil spring 34, and the stepped portion of the anode terminal 32 is engaged with the lower end of the coil spring 34.

The stationary contact member 36 is made of titanium and is screwed to the lower end of the anode terminal 32. The bottom surface of the stationary contact member 36 is formed in a cylindrical surface so as to slide with a small contact area with the small diameter portion of the anode 6. The anode 6 is rotated while the bottom surface of the stationary contact member 36 that is the stationary side of the anode electrical contact and the aluminum anode 6 that is the movable side of the anode electrical contact are in contact. As a result, a current flows from the positive terminal of the power supply unit 11 to the anode 6 through the anode terminal 32 and the stationary contact member 36.
As a modification, the fixed side contact member 36 and / or the movable side of the anode electrical contact can be made of a corrosion-resistant metal material such as titanium or a titanium alloy.

The insulating sleeve 38 is a pipe made of Teflon (registered trademark), and is disposed so as to cover the anode terminal 32 and the coil spring 34. The spring adjusting bolt 40 is a Teflon (registered trademark) in which a bore is formed at the center. ) Made of bolt-like member, and is formed so as to be screwed onto the upper portion of the insulating sleeve 38. The spring adjustment bolt 40 is disposed such that the anode terminal 32 passes through the bore and the tip of the spring adjustment bolt 40 presses the upper end of the coil spring 34. For this reason, by rotating the spring adjustment bolt 40, the force for compressing the coil spring 34 changes, and the force for pressing the stationary contact member 36 against the anode 6 can be adjusted.

Next, the operation of the barrel plating apparatus 1 according to the first embodiment of the present invention will be described.
First, small articles such as iron bolts and screws, which are objects to be plated, are placed in the barrel 4 of the barrel plating apparatus 1 of the present embodiment. Thereby, each to-be-plated object is electrically connected with a cathode through the other to-be-plated object which is in direct contact with the inner wall surface of the barrel 4 or in contact with the inner wall surface of the barrel 4. After putting an object to be plated in the barrel 4, the barrel plating apparatus 1 is immersed in a plating tank containing a plating solution up to a predetermined position. Specifically, the barrel plating apparatus 1 is plated so that the barrel 4 and the anode 6 are completely immersed in the plating solution, and the barrel driving motor 8 and the anode driving motor 10 are positioned above the liquid surface of the plating solution. Immerse in the liquid. In this embodiment, a non-aqueous Al—Mn—Zn alloy plating solution having a bath temperature of about 80 to 110 ° C. is used as the plating solution.

Next, the barrel driving motor 8 and the anode driving motor 10 are started. The anode 6 is rotated at about 50 to 100 rpm around the central axis of the anode 6 by the driving force of the anode driving motor 10. On the other hand, the barrel gear 12 of the barrel 4 is rotationally driven at a rotational speed of about 1 rpm by the driving force of the barrel driving motor 8 and is swung so that the rotational direction is reversed every time it is rotated about 90 °. .

Further, for example, a pulsed 50 A-10 V current is caused to flow between the anode terminal 32 and the cathode terminal 18 by the power supply unit 11. Thereby, the current flows through the anode terminal 32, the fixed contact member 36, the anode 6, the plating solution, the object to be plated, and the cathode (the inner wall surface of the barrel 4). For example, metal ions such as aluminum ions, manganese ions, and zirconium ions eluted from the anode 6 are supplied into the plating solution, and the metal ions in the plating solution are reduced and deposited on the surface of the object to be plated. A uniform and dense plating layer of zirconium or the like is formed. The current efficiency at this time is usually 95% or more.

Further, when the barrel 4 is swung, the object to be plated in the barrel 4 is mixed, and a uniform plating layer is formed on the surface of the object to be plated. Further, the baffle plate 20 provided in the barrel 4 promotes the mixing of the objects to be plated in the barrel 4 and forms a more uniform plating layer. Further, since the inner wall surface of the barrel 4 constitutes the cathode, the number of the objects to be plated is small, and even when the objects to be plated are not in contact with each other, the conduction of the objects to be plated to the cathode is ensured. The occurrence of bipolar phenomenon is prevented. Furthermore, since the anode cover 16 is disposed around the anode 6, even when the number of objects to be plated is large, direct contact of the objects to be plated with the anode 6 is prevented.

Further, since the anode 6 immersed in the plating solution is rotated, a flow of the plating solution is always generated around the anode 6 and the bath voltage (voltage between the anode terminal 32 and the cathode terminal 18) is abnormally increased. Can be prevented. Furthermore, since the anode 6 is disposed in the barrel 4 at a position relatively close to the cathode, and the object to be plated is disposed so as to surround the anode 6, the exposed area of the anode 6 with respect to the object to be plated increases, Black deposits due to concentration and burning are prevented.
After a predetermined time, the application of voltage by the power supply unit 11 is stopped, and the barrel plating apparatus 1 is pulled up from the plating bath to finish the plating operation.

Next, a barrel plating apparatus according to a second embodiment of the present invention will be described with reference to FIG. The barrel plating apparatus according to this embodiment is different from the first embodiment described above in that it is a sealed barrel plating apparatus. Here, only the points of the present embodiment that are different from the first embodiment will be described, and descriptions of similar configurations, functions, and effects will be omitted. FIG. 6 is a cross-sectional view schematically showing the configuration of the barrel plating apparatus according to the second embodiment of the present invention.

As shown in FIG. 6, the barrel plating apparatus 100 according to the second embodiment of the present invention includes a sealed barrel 104, an anode 106 disposed in the barrel 104, and a plating solution introduced into the barrel 104. And a plating solution replenishment tank 108 for storing the liquid. In the present embodiment, the plating solution in the barrel 104 is forcibly circulated by a pump between a plating solution supply tank 108 which is a plating solution tank provided separately from the barrel 104.

The barrel 104 is configured in a truncated cone shape and is configured to be hermetically sealed so that the plating solution can be accommodated therein. The barrel 104 is arranged so that the central axis thereof is inclined by about 45 ° with respect to the vertical line, and is configured to be rotated around the central axis by a barrel driving motor (not shown). ing. A metal cathode 104 a is disposed so as to cover the inner side surface and the bottom surface of the barrel 104. The objects to be plated accommodated in the barrel 104 gather in the lower part of the bottom surface of the inclined truncated cone, and are mixed by the barrel 104 being rotated about the central axis of the truncated cone.

The anode 106 is disposed on the central axis of the barrel 104, is supported by a shaft 106a inserted into the barrel 104, and is disposed on the central axis inside the barrel 104. The shaft 106 a is rotationally driven by an anode driving motor (not shown), and the anode 106 is rotated around the central axis of the barrel 104 inside the barrel 104.

Further, a plating solution extraction pipe 110 for extracting the plating solution in the barrel 104 to the outside is inserted into the barrel 104, and the plating solution extraction pipe 110 is provided at the extraction port 110 a provided on the top surface of the barrel 104. And is connected to a plating solution supply tank 108. The plating solution supply tank 108 is a sealed tank, and a predetermined amount of plating solution is stored inside.

A plating solution injection pipe 112 is connected to the plating solution supply tank 108, and this plating solution injection pipe 112 extends into the barrel 104 through an injection port 112a. The plating solution supply tank 108 has a built-in pump (not shown). By this pump, the plating solution is drawn out to the plating solution supply tank 108 through the plating solution drawing pipe 110 and is returned to the barrel 104 through the plating solution injection pipe 112 pipe.

Furthermore, a nitrogen gas inlet 114 a and a nitrogen gas outlet 114 b are provided on the top surface of the barrel 104 so that the nitrogen gas can be circulated through the barrel 104. Thereby, the space in the sealed barrel 104 is filled with nitrogen gas.

According to the barrel plating apparatus of the second embodiment of the present invention, since the sealed barrel is used, the plating process can be performed in a nitrogen atmosphere without providing a special purge chamber.

The preferred embodiments of the present invention have been described above, but various modifications can be made to the above-described embodiments. In particular, in the above-described embodiment, the present invention is applied to a barrel plating apparatus for aluminum electroplating using a soluble anode. In addition to the non-aqueous solution aluminum molten salt plating described above, an insoluble anode is used. The present invention can be applied to any barrel plating apparatus such as a plating apparatus or an aqueous plating apparatus.

In the above-described embodiment, the anode is rotated in the barrel. However, the barrel plating apparatus of the present invention can be configured such that the anode is swung or vibrated.

Furthermore, in the above-described embodiment, the barrel is swung or rotated, but the barrel plating apparatus of the present invention can also be configured so that the barrel is vibrated.

DESCRIPTION OF SYMBOLS 1

Barrel plating apparatus

2a,

2b Frame board

2c, 2d, 2e Connecting rod 4 Barrel 6 Anode 8 Barrel drive motor (barrel drive part) by 1st Embodiment of this invention
10 Anode drive motor (anode drive)
DESCRIPTION OF SYMBOLS 11 Power supply part 12 Barrel gear 14 Thin plate 16 Anode cover 18 Cathode terminal 20 Baffle plate 22

Anode drive gear

24a, 24b,

24c Transmission gear

26a, 26b Transmission gear 28

Rod

30a, 30b Micro switch 32 Anode terminal 34 Coil spring 36 Fixed side contact member 38 Insulating sleeve 40 Spring adjusting bolt 100 Barrel plating apparatus according to the second embodiment of the present invention 104 Barrel 106 Anode 106a Shaft 108 Plating solution supply tank 110 Plating solution extraction pipe 110a Drawer port 112 Plating solution injection pipe 112a Inlet port 114a Nitrogen gas inlet 114b Nitrogen gas outlet

Claims

A barrel plating apparatus,
A barrel with a cathode on the inner wall that houses the object to be plated inside,
An anode placed in this barrel;
A barrel drive for rotating, swinging, or vibrating the barrel;
An anode driving unit for rotating, swinging, or vibrating the anode;
A barrel plating apparatus characterized by comprising:
The barrel according to claim 1, further comprising an anode electrical contact for energizing the anode while allowing the anode to rotate, swing or vibrate, the anode electrical contact being immersed in a plating solution. Plating equipment.
The barrel plating apparatus according to claim 1 or 2, wherein the contact portion of the anode electrical contact is made of a corrosion-resistant metal material on both the movable side connected to the anode and the fixed side in contact with the anode.
The barrel plating apparatus according to any one of claims 1 to 3, wherein the corrosion-resistant metal material is titanium or a titanium alloy.
The barrel plating apparatus according to any one of claims 1 to 4, wherein the anode has a cylindrical or columnar shape.
The barrel plating apparatus according to any one of claims 1 to 5, wherein the anode has irregularities formed on a surface thereof.
The barrel plating apparatus according to any one of claims 1 to 6, wherein the anode is an insoluble anode or a soluble anode.
The barrel plating apparatus according to any one of claims 1 to 7, wherein the anode is obtained by attaching a replaceable soluble anode material or an insoluble anode material to a hollow cylindrical surface made of plastic and / or metal.
The barrel plating apparatus according to any one of claims 1 to 8, wherein the cathode is formed of a conductive material.
The barrel plating apparatus according to any one of claims 1 to 9, wherein the cathode is made of copper, gold, iron, nickel, stainless steel, aluminum, titanium, carbon, or a conductive resin.
The said cathode and the cathode provided in the inner wall surface are formed with many holes, and the plating solution flows into or out of the barrel through these holes. The barrel plating apparatus as described.
The barrel plating apparatus according to any one of claims 1 to 11, wherein the barrel is capable of forcibly circulating a plating solution in the barrel with a separately provided plating solution tank.
The barrel plating apparatus according to any one of claims 1 to 12, wherein the cathode provided on the inner wall surface of the barrel covers the entire inner wall surface of the barrel.
14. The barrel plating apparatus according to any one of claims 1 to 13, further comprising a triangular prism-shaped baffle plate arranged in the barrel for mixing the objects to be plated in the barrel.
The barrel plating apparatus according to any one of claims 1 to 14, wherein the barrel is made of polyvinyl chloride, polypropylene, or Teflon.
The barrel plating apparatus according to any one of claims 1 to 15, further comprising a pulse power supply unit that applies a pulsed voltage between the cathode and the anode.