JPH0971900A - Anode rod for electroplating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of a plating cell by improving the stirring of a plating liquid and lessening electrical loss by forming anode rods to be used at the time of electroplating the inner peripheral wall of the cylinder of a V- engine in such a manner that the parts to be inserted into the cylinder are inclined and the parts outside the cylinder face perpendicularly upward. SOLUTION: The cylinder 6 of the V-engine 6 which is the object to be plated is placed on a plating jig 4 in the plating liquid 3 in the plating cell 2. A pair of the anode rods 1 connected an anode plate 7 are inserted into the cylinder 6 and the plating jig 4 is vibrated by a vibration motor 10. Air is fed via a pipe 9 and is ejected from holes 11 to stir the plating liquid 3, by which the inner periphery wall of the cylinder 6 is electroplated. At this time, the parts of the anode rods 1 to be inserted into the cylinder 6 are formed as the inclined parts nearly parallel with the inner periphery wall of the cylinder 6 and the parts existing outside the cylinder 6 are formed as the parts facing nearly perpendicularly upward. As a result, the shorter anode plate 7 is necessitated and the energization loss, plating weight and the load on the vibration motor 10 are lessened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an anode rod for electroplating for plating an inner peripheral wall of a cylinder of a V-type engine.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional V-type engine cylinder plating apparatus using an anode electrode for electroplating. This conventional electroplating anode rod 19 has a straight rod shape,
The upper ends of the anode rods 19 that are not inserted into the cylinder 6 are connected to each other by an anode plate 7. The plating jig 4 is for placing the cylinder 6, which is the object to be plated, on a horizontal surface and mounting the cylinder in a stable posture. When the cylinder 6 and the main body of the plating jig 4 of the V-type engine are connected to the cathode and the anode plate 7 and the anode rod 19 are connected to the anode, the engine cylinder 6 is plated when electricity is applied.

This plating apparatus blows air from a pipe (not shown) to stir the plating solution with air in order to make the plating film uniform and shorten the time.
In some cases, a vibration motor (not shown) may be used to vibrate and stir the entire plating jig.

[0004]

However, since the conventional anode rod 19 has a straight rod shape, the upper end of the two anode rods 19 which are not inserted into the cylinder 6 is wide and the anode plate 7 is long. Will end up. Therefore, the energization distance becomes long and the electrical loss becomes large. Moreover, since the weight of the plating jig 4 is large, the load during work and the load on the vibration motor are large. Moreover, since the lateral protrusion is large, the width of the entire plating jig 4 is large. Therefore, a large-sized plating tank is required, which requires equipment cost and plating solution cost.

In the case of stirring by vibration, if the anode plate and the anode rod are immersed in the plating solution, there is a risk of short-circuiting between them and the portion to be plated, which may cause defective plating. Further, in particular, when the plating solution is applied to the portion where the upper end of the anode rod 19 and the anode plate 7 are in contact with each other, the metal is eluted, so it is necessary to avoid submerging the upper end of the anode rod 19 and the anode plate 7.
In the conventional anode rod 19, since the electric contacts such as the anode plate 7 are easily submerged in the plating solution during processing, the vibration distance cannot be increased. On the other hand, if the total length of the anode rod 19 is increased to increase the vibration distance, the tip of the plating solution rises and the risk of submersion in water decreases. However, the width becomes larger accordingly, and the plating tank needs to be made larger.

FIG. 4 is a schematic view showing a state where a conventional anode rod is filled with nickel. Conventional anode rod body 20
Is a titanium alloy pipe, and nickel particles 18 are filled therein for use. If there is a gap between the nickel particles 18 or the packing density is uneven when the nickel particles 18 are filled, there is a disadvantage that the current is not stable and uneven plating or uneven film thickness occurs. As shown in FIG.
In the conventional anode rod, since the direction of filling the nickel particles 18 and the direction of gravity applied to the nickel particles 18 are different, it is not possible to effectively use the gravity, and a gap is formed between the nickel particles 18, or a deviation of the packing density occurs. Cheap.

Therefore, according to the present invention, it is possible to obtain a large vibration width when vibrating and stirring, a small size, and an anode plate for electroplating which is configured so that the density of the filled nickel particles becomes uniform, and the electric plating. An object of the present invention is to provide an electroplating apparatus having one or more plating anode rods.

[0008]

In order to achieve the above object, the present invention provides an electroplating method for electroplating the inner peripheral wall of a cylinder by immersing the cylinder of a V-type engine in a plating bath. An anode rod for use, which has an inclined portion that is substantially parallel to the inner peripheral wall of the cylinder that is inserted into the cylinder hole from the side where the distance between the cylinders is open during operation, and a substantially vertically upward portion that is outside the cylinder. A bent electroplating anode bar is provided. Furthermore, the present invention provides a cylinder plating apparatus having one or more of the above-mentioned electroplating anode rods.

In the anode rod of the present invention, the distance between the upper ends of the two anode rods can be narrowed, so that the anode plate can be short, the power loss, the plating weight, and the load on the vibration motor can be reduced. Further, by bending the anode rod in the vertical direction, the filling of nickel particles becomes good, and it is possible to prevent uneven plating and uneven film thickness. Furthermore, air bubbles are well removed during agitation of air, and the resistance of the plating solution during agitation is reduced, so that agitation can be performed efficiently, so that the quality of plating is improved and the time required for plating is shortened. Since the cylinder plating apparatus of the present invention requires a small plating tank,
Equipment costs and plating solution costs can be reduced.

[0010]

EXAMPLE FIG. 1 shows the configuration of an electroplating apparatus using the electroplating anode rod of the present invention. The electroplating anode rod 1 of the present invention has an inclined portion that is substantially parallel to the inner peripheral wall of the cylinder that is inserted into the cylinder hole from the side where the distance between the cylinders is open during operation, and is substantially vertically upward outside the cylinder. And a bent portion. In the electroplating apparatus using this anode rod 1, the plating solution 3 is stored in the plating tank 2, the cylinder 6 of the V-type engine, which is the object to be plated, is placed on the plating jig 4, and the anode rod 1 is Attach to the support base 5. The cylinder 6 of this V-type engine has a stable posture with the cylinder ends spaced apart from each other facing upward for smooth work.
That is, it is preferable that the inner peripheral wall surface, which is the surface to be processed, be placed on the plating jig 4 in an inclined posture. When the engine cylinder 6 and the body of the plating jig 4 which are the objects to be plated are connected to the cathode and the anode plate 7 and the anode rod 1 are connected to the anode, and the plating power source 8 is energized, the inner peripheral wall of the engine cylinder 6 is plated.

In the plating tank 2, in order to make the plating film uniform, air stirring for jetting air from the air stirring pipe 9 and stirring for vertically vibrating the entire plating jig 4 by the vibration motor 10 can be performed. preferable.

In order to perform air agitation, an air agitation pipe 9 is introduced into the plating solution 3 from one side of the plating tank 2, and its tip is horizontally arranged below the plating jig 4. Also,
The air agitating pipe 9 below the plating jig 4 has several holes 1
1 is provided. When an air stirring pipe 9 is driven by a pump (not shown), air is supplied into the pipe and the hole 1
1 to the plating solution 3.

In order to vibrate and stir, a vibration motor 10 is arranged immediately above the plating jig 4, and by operating this vibration motor 10, the plating jig 4 is vertically vibrated, and the plating solution 3 Can be stirred.

The structure of the electroplating anode rod of the present invention is shown in FIG.
Shown in The anode rod body 12 is a titanium alloy pipe, and nickel particles are filled therein for use. Anode rod body 12
The liner portion of the engine block, that is, the portion adjacent to the portion to be plated is the titanium alloy mesh portion 13
It is desirable that the nickel ions be smoothly supplied by arranging. Further, the portion not close to the portion to be plated is covered with the vinyl chloride coating 14 or a film to prevent an electrical short circuit and a power loss. The anode rod body 12 is fixed to the anode plate with the anode plate fixing screws 15, and the support base is pin 16
Fixed at. At the tip of the anode rod body 12 on the anode plate side,
Dispose the lid 17.

The structure of the electroplating anode rod of the present invention has been described above with reference to the embodiments. However, the present invention is not limited to this, and various modifications can be made based on the technical idea of the present invention. Is possible.

[0016]

According to the present invention, by bending the anode rod as described above, the distance between both ends of the two anode rods which are not inserted in the cylinder is narrowed and the length of the anode plate is shortened. Therefore, electrical loss can be reduced. Furthermore, since the weight of the plating jig is reduced, the work load is lightened and the load on the vibration motor is also reduced.

Further, as shown in FIG. 3, by bending the anode rod 1 as described above, the gap between the upper ends of the two anode rods becomes smaller as compared with the conventional anode rod 19, so that the plating is performed. The width of the entire jig 4 can be reduced. for that reason,
The plating tank can also be downsized, and equipment costs and plating solution costs can be reduced.

As shown in FIG. 3, the anode rod 1 of the present invention has the conventional anode rod 19 even though it has the same length as the conventional anode rod.
The protrusion of the tip from the plating solution is higher than that.
Therefore, when the plating jig is vertically vibrated during plating, the risk of the anode plate and the anode rod being submerged in the plating solution is reduced. Therefore, it is possible to sufficiently stir the vibration with a large vibration width, and to perform the plating more uniformly.

Further, as shown in FIG. 4, the anode rod 1 of the present invention is bent vertically upward as described above, so that the filling direction of the nickel particles 18 and the direction of gravity are the same. Therefore, the gravity applied to the nickel particles 18 can be effectively used. The anode rod of the present invention is made of nickel particles 18
When nickel is dissolved and becomes smaller as the plating progresses, the nickel particles 18 are sequentially and smoothly filled downward without forming gaps between the nickel particles 18 and uneven filling density. Therefore, the current flows stably, and there is no inconvenience such as uneven plating and uneven film thickness.

When the anode rod of the present invention is bent vertically upward, the resistance received from the plating solution is reduced when the plate is vibrated vertically and stirred, so that the vibration motor can be downsized and the power consumption can be saved.

When stirring with air, the bubbles rise upward from the lower part of the plating tank, and part of them pass through the inside of the anode rod. However, since air has an insulating property, it is not preferable that it exists in the anode rod in terms of electrical conductivity. When the anode rod of the present invention is bent vertically upward, bubbles can easily escape upward, and good electrical conductivity can be maintained.

[Brief description of drawings]

FIG. 1 shows an electroplating apparatus using an electroplating anode rod of the present invention.

FIG. 2 shows the structure of an electroplating anode rod of the present invention.

FIG. 3 shows an anode rod of the present invention and a conventional anode rod.

FIG. 4 is a schematic diagram showing a state where nickel particles are filled in the conventional electroplating anode rod and the electroplating anode rod of the present invention.

FIG. 5 shows a conventional electroplating anode rod.

[Explanation of symbols]

 1 Anode Rod 2 Plating Tank 3 Plating Solution 4 Plating Jig 5 Support Stand 6 Engine Cylinder 7 Anode Plate 8 Plating Power Supply 9 Air Stirring Pipe 10 Vibration Motor 11 Holes 12 Anode Rod Body 13 Mesh Part 14 Vinyl Chloride Coating 15 Anode Plate Fixing Screw 16 Pin 17 Lid 18 Nickel grain 19 Conventional anode rod 20 Conventional anode rod body

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ruri Higuchi 300, Takatsuka-cho, Hamamatsu City, Shizuoka Prefecture Suzuki Stock Company

Claims (2)

[Claims] 1. An electroplating anode rod used when electroplating an inner peripheral wall of a V-type engine by immersing a cylinder of a V-type engine in a plating solution in a plating tank, wherein the cylinder hole is provided between the cylinder holes during operation. A bent anode plate for electroplating, which has an inclined portion substantially parallel to the inner peripheral wall of the cylinder inserted from the side where the distance is open and a substantially vertically upward portion outside the cylinder. 2. The anode plate for electroplating according to claim 1
Cylinder plating equipment with more than one.