JP3242537B2 - Plating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plating apparatus for electroplating a cylindrical portion such as a cylinder block of an engine, and more particularly to a plating apparatus in which a pellet made of a soluble anode material such as nickel is loaded on an electrode. It is about.

[0002]

2. Description of the Related Art Conventionally, an electrode is provided on a plating apparatus main body, and the electrode is used as an anode and the work is used as a cathode in a state where a plating solution is interposed between the electrode and a portion to be plated of the work. There is known an apparatus in which a portion to be plated of a workpiece is subjected to electroplating by being connected to a power source.

[0003] In particular, as an apparatus for applying nickel plating or the like to a work having a cylindrical portion such as a cylinder of a cylinder block of an engine, for example, an apparatus as disclosed in JP-A-4-333594 is known. According to this device, the cylindrical electrode is arranged above the work setting table, and when the work is set on the setting table, the electrode is located in the work and faces the cylindrical portion peripheral surface of the work. The plating solution is supplied into the work, and the plating solution is circulated so that the plating solution flows in the work, so that plating is performed at high speed.

In this device, the electrode portion is
It is composed of a reticulated anode tube (electrode main body) and a tube inside thereof, and a soluble anode material such as a nickel lump is accommodated between these tubes. It elutes in the plating solution.

[0005]

When electroplating is performed using an electrode containing a soluble anode material inside the electrode body, the amount of soluble anode material in the electrode decreases as plating is repeated. After a short period of time, it is necessary to replenish the soluble anode material in the electrode,
Conventionally, such replenishment of the soluble anode material has been performed by removing the electrode.

However, in the above-described apparatus for performing high-speed plating, there is a disadvantage that the soluble anode material is greatly consumed, so that the frequency of replenishment increases, and the work of replenishing the soluble anode material becomes complicated.

Therefore, a replenishing port for replenishing the soluble anode material is formed in the electrode, so that the soluble anode material can be supplied from the outside without removing the electrode at the time of non-plating, so that workability at the time of replenishment can be improved. Such a structure can be considered, but in such a structure, the stored soluble anode material flows out (pops out) from the supply port during plating.
There is a possibility that. In particular, in the above-described apparatus that performs plating at a high speed, if the flow rate of the plating solution is increased, the soluble anode material is more likely to flow out of the supply port under the influence of the plating solution. There is a disadvantage that it cannot be increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and a plating method capable of reliably preventing the soluble anode material from flowing out at the time of plating while improving the replenishability of the soluble anode material to the electrode. It is intended to provide a device.

[0009]

The invention according to claim 1 is
In a plating apparatus configured to supply a plating solution to the inner peripheral surface of a cylindrical portion of a workpiece having a cylindrical portion to perform plating, a plating apparatus main body may be closed with a lower opening of the cylindrical portion. A work supporting portion for supporting the work, and an electrode protruding into the cylindrical portion while the work is supported are provided, and the electrode is formed of a cylindrical electrode body and a soluble anode material in the electrode body. A seal member is provided, which is provided with a pellet accommodating portion for accommodating a large number of pellets and an opening for introducing a pellet, and is attached to the work at the time of plating to seal an upper opening of the cylindrical portion. And a closing member that closes the opening of the electrode while the work is supported by the work supporting portion.

According to a second aspect of the present invention, in the plating apparatus of the first aspect, the electrode main body of the electrode includes an inner cylindrical portion and an outer cylindrical portion, and a pellet housing portion is formed between the inner and outer cylindrical portions. And the upper end thereof is provided with the opening, wherein the closing member is formed of a porous member that allows a plating solution to flow therethrough, and the work is supported by the work supporting portion. The closing member is disposed so as to cover the upper end portion of the electrode, and the space outside the outer tube portion and the space inside the inner tube portion of the electrode main body serve as a plating solution flow path. Are connected to a liquid introduction pipe and a plating liquid discharge pipe connected to the plating liquid supply section, and are connected to each other at the upper end of the electrode via the closing member.

According to a third aspect of the present invention, in the plating apparatus according to the third aspect, the closing member is formed in a hollow shape.

[0012]

According to the first aspect of the present invention, at the time of plating, the electrode is located inside the cylindrical portion of the work, and the upper opening of the cylindrical portion is sealed by the seal member and formed on the electrode. The plating is applied to the inner surface of the cylindrical portion of the work in a state where the formed pellet introduction opening is closed by the closing member. When the plating is completed, the work and the seal member are removed, whereby the opening of the electrode is opened, and the supply of pellets to the pellet storage portion is easily performed through the opening.

According to the second aspect of the present invention, at the time of plating, plating is performed at a high speed while the plating solution flows while the electrodes are located inside the cylindrical portion of the work. At this time, the plating solution flows into and out of the electrode main body via the closing member at the upper end of the electrode. Then, at the time of non-plating, the work and the seal member are removed, so that the opening of the pellet accommodating portion is opened, whereby the pellet is supplied from the upper end of the electrode into the pellet accommodating portion.

According to the third aspect of the present invention, the rigidity of the closing member against the flow of the plating solution is increased.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to the drawings.

1 to 3 schematically show a cross section of a plating apparatus according to the present invention. The work shown in the figure is a cylinder block 1 of an engine, and its cylinder 1b
The inner surface of the (cylindrical portion) is plated.
Although the type of plating is not limited by the present invention, in the present embodiment, nickel is subjected to composite plating containing silicon carbide and phosphorus as a dispersant, and in particular, in this apparatus, Cylinder block 1
The high-speed plating is performed by flowing the plating solution to the cylinder 1b.

In these figures, a support block 4 as a work support is provided on a base 3 of a plating apparatus main body 2, and a cylinder block 1 is provided on the support block 4.
Is supported, and the lower opening of the cylinder 1 b is closed by the support block 4. Specifically, a cylinder component 1a having four cylinders 1b arranged in parallel
And a skirt-shaped crankcase portion 1c are integrally formed with the cylinder block 1 in a state in which the cylinder block 1 is turned upside down as compared with a state when mounted on a vehicle, and is coupled to an upper end of the crankcase portion 1c. 20 and support block 4
In this state, the lower openings (head-side openings) of the respective cylinders 1 b are closed by the support blocks 4.

The support block 4 is provided with a processing liquid outlet passage 5 extending in a lateral direction (cylinder arrangement direction) at a position below the cylinder component 1a of the cylinder block 1. On the upper surface of the support block 4, an opening 5a communicating with the treatment liquid outlet passage 5 is provided at a position corresponding to each cylinder 1b of the cylinder block 1, and a seal portion 5b is provided around the opening 5a. When the cylinder block 1 is supported on the support block 4 as described above, the lower opening of each cylinder 1b of the cylinder block 1 and the opening 5a coincide with each other, and the sealing portion 5b Thereby, the gap between the upper surface of the support block 4 and the lower end surface (head side end surface) of the cylinder block 1 is sealed.

Further, the plating apparatus main body 2 is provided with electrodes 6 at positions corresponding to the respective cylinders 1b of the cylinder block 1 supported as described above. This electrode 6
A pellet accommodating portion 7 is provided in a cylindrical electrode body, and a large number of pellets 10 made of nickel as a soluble anode material are accommodated in the pellet accommodating portion 7. The electrode main body is composed of an inner cylindrical portion 8 made of a metal pipe and an outer cylindrical portion 9 made of a porous metal plate or the like, and a pellet accommodating portion 7 is formed between the inner and outer cylindrical portions 8 and 9. The outer cylinder 9 is
A cover 8 made of a porous metal plate or the like protrudes slightly above the inner cylindrical portion 8,
a is attached.

The electrode 6 is mounted on a holder 11 mounted on the base 3 via a cylindrical mounting member 12, and penetrates the processing liquid outlet passage 5 to open the opening 5a.
Projecting upwards. Then, with the cylinder block 1 supported on the support block 4 as described above,
The electrode 6 protrudes into each cylinder 1b of the cylinder block 1, the upper end of the electrode 6 reaches near the upper end of the cylinder 1b, and a constant gap is maintained between the outer peripheral surface of the electrode 6 and the inner peripheral surface of the cylinder. It is supposed to be. Thus, inside each of the cylinders 1b of the cylinder block 1, channels 14 and 15 communicating with each other at the upper portion via the cover 8a are formed inside and outside the electrode 6 (inside the inner cylindrical portion 8) and outside. Flow path 15 communicates with the processing liquid outlet passage 5.

A through hole is formed in the holder 11, and the through hole and the internal space of the mounting member 12
Processing liquid introduction passage 16 communicating with flow passage 14 inside electrode 6
Are formed.

The supply and discharge system and the electric system for the plating solution to and from the plating apparatus body 2 are not shown, but the plating solution is introduced from the plating bath through the plating solution supply pipe equipped with a pump. Sent into passage 16,
A plating solution supply / discharge system is configured so that the plating solution is recovered from the processing solution outlet passage 5 to the plating bath via the plating solution recovery pipe after passing through the flow paths 14 and 15. The electrode 6 is connected to the positive side of the power supply circuit, and the cylinder block 1 is connected to the negative side of the power supply circuit via a jig 20 or the like, which will be described later. The electric system is configured so that a voltage is applied between the electric system and the power supply.

The jig 20 connected to the cylinder block 1 includes the support block 4 of each cylinder 1b.
A seal member is provided to be inserted into an upper opening (an opening on the crankcase side) which is an opening opposite to the side.

As shown in FIG. 3, the jig 20 has a plate 21 which is in contact with the upper end of the cylinder block 1 and a locking plate for the cylinder 1b at a position corresponding to each cylinder 1b of the cylinder block 1. 22
And a seal holding plate 23 located below the plate, and both plates 22, 23 formed to have a predetermined diameter corresponding to the cylinder bore diameter.
O-ring 24 sandwiched between outer peripheries of the housing, and a housing cover 2 integrally attached to the lower portion of the seal holding plate 23.
6 and a rod 25 connected to the seal holding plate 23.

The rod 25 is vertically movable with respect to the plate 21 and is inserted into an insertion hole provided in the plate 21 so that an upper end protrudes above the plate 21 and a screw portion 25a is formed on the upper end. This screw part 25a is provided.
Is screwed with the nut member 27. The lower end of the rod 25 has reached a position corresponding to the upper opening of the cylinder 1b. In the vicinity of the lower end of the rod 25, the locking plate 22 is fitted to the rod 25 so as to be relatively movable in the vertical direction, and the seal holding plate 23 is attached to the rod 25 so as to move vertically. ing.

The two plates 22, 23 and the O-ring 24 constitute a sealing member for sealing the upper opening of the cylinder 1b, and when the cylinder block 1 and the jig 20 are joined together, 23 and O-ring 24
Are located in the upper opening of the cylinder 1b and the locking plate 2
2 is locked at a step between the cylinder wall and the crankshaft support wall 1d connected thereto. The rod 25 and the nut member 27 apply an upward pressing force to the O-ring 24 via the seal holding plate 23.

The housing cover 26 is a closing member for closing the upper opening of the pellet housing 7 of the electrode 6, and is made of, for example, a porous metal plate or the like, has a hollow cylindrical structure, The diameter is configured to be slightly smaller than the inner diameter of the outer cylindrical portion 9 of the electrode 6. Then, in a state where the cylinder block 1 is set on the support block 4, the lower end portion of the storage unit cover 26 appropriately protrudes into the outer cylindrical portion 9 of the electrode 6, and is located directly above the cover 8 a. Has become.

Next, the operation of the apparatus of the present embodiment configured as described above will be described.

Prior to plating, a jig 20 is mounted on the cylinder block 1. When mounting the jig 20 on the cylinder block 1, first,
The locking plate 22, the seal holding plate 23, the housing cover 26, and the O-ring 24 are set in the upper opening of each cylinder 1b, and the upper part of each rod 25 is inserted through the insertion hole of the plate 21. In the state, the screw part 25
The nut member 27 is screwed into a. Then, by rotating the nut member 27, the seal holding plate 23 is pulled up from the position indicated by the two-dot chain line to the position indicated by the solid line in FIG. As a result, the O-ring 24 is vertically compressed by the locking plate 22 locked to the upper end of the cylinder and the seal holding plate 23, and the O-ring 24 bulges outward with this, and the inner circumference of the cylinder 1b is expanded. Press against the surface. This achieves sealing of the upper opening of the cylinder 1b.

When the jig 20 is mounted in this way, the cylinder block 1 is set on the support block 4 of the plating apparatus main body 2. Then, by operating a pump (not shown), the plating solution is supplied to the plating apparatus main body 2, whereby the plating solution flows into the processing solution introduction passage 16, passes through the flow paths 14, 15, and is treated with the processing solution. High-speed plating is performed by applying a voltage between the electrode 6 and the cylinder block 1 while flowing out of the lead-out passage 5 and flowing along the inner surface of the cylinder 1b, which is the surface to be plated.

While the plating is being performed as described above, the housing cover 26 provided on the jig 20 protrudes into the outer cylindrical portion 9 of the electrode 6 as described above, whereby the pellet is stored. The upper opening of the portion 7 is closed, so that the pellet 10 is prevented from jumping out (flowing out) due to the flow of the plating solution. On the other hand, the plating solution flows favorably through the cover 8a of the inner cylinder portion 8 and the hole of the storage portion cover 26, so that high-speed plating on the cylinder 1b is promoted.

As the nickel in the plating solution precipitates on the surface of the cylinder block 1 to be plated, the electrode 6
Nickel elutes from the pellet 10 into the plating solution, whereby the pellet 10 in the pellet storage 7 is gradually consumed and reduced. In this way, when the amount of the pellets in the pellet storage section 7 becomes equal to or less than the predetermined amount, the pellet storage section 7 is replenished with the pellets 10 during the non-plating when the cylinder block 1 and the jig 20 are removed from the plating apparatus main body 2. Will be At this time, in the non-plated state, since the storage unit cover 26 is removed integrally with the jig 20, the open state of the upper opening of the pellet storage unit 7 is ensured, and the pellet storage unit is opened via the upper opening. Pellets 1 to 7
Zero supply is performed. In addition, since the cover 8a is attached to the upper portion of the inner cylinder portion 8, the inner
That is, the pellets 10 do not fall into the flow path 15.

As described above, according to the apparatus of the above-described embodiment, the supply of the pellets 10 to the pellet storage section 7 is easily performed from the upper opening portion of the pellet storage section 7. Moreover, at the time of plating, the pellet storage section 7 is provided by the storage section cover 26.
Is closed, so that the pellets 10 in the pellet storage portion 7 do not jump out to the outside under the influence of the flowing plating solution. Therefore, even when the plating solution is caused to flow at a high speed in order to perform plating on the cylinder 1b at a higher speed, it is necessary to reliably prevent the pellets 10 from jumping out of the pellet storage unit 7 and to perform appropriate plating. Can be.

Further, according to the above-described apparatus, since the opening portion is provided above the pellet accommodating portion 7 and the columnar cover 26 is provided on the sealing member of the jig 20, the structure is simple.
This is advantageous in that the structure of the electrode 6 is not unnecessarily complicated. In addition, since the cylindrical cover 26 is provided on the jig side, the opening operation of the upper opening portion of the pellet accommodating portion 7 is performed by removing the cylinder block 1, so that there is an advantage that workability is extremely good.

The present invention relates to a jig 2 of the first embodiment.
The present invention is also applicable to a case where a jig provided with a seal member having a configuration different from zero is used. Hereinafter, the example will be described.

FIG. 4 shows a second embodiment of the apparatus according to the present invention.

In this figure, a jig 30 is provided with a plate 31 abutting on the upper end of the cylinder block 1 at a position corresponding to each cylinder 1b of the cylinder block 1.
A column-shaped mounting member 32 reaching the upper opening of the cylinder 1b from below is provided, and an elastic sealing member 33 formed in a substantially disk shape by an elastic material such as rubber is attached to a lower end of the mounting member 32. I have.

The mounting member 32 and the elastic sealing member 3
3 is provided so as to be vertically movable with respect to the jig 30.
4, a plate 34a located on the lower surface of the elastic sealing member 33 is attached to the lower end of the elastic member 33.
On the lower surface of the housing 4a, a housing cover 26a substantially similar to the housing cover 26 is mounted. An air cylinder 35 is provided above the jig 30, and an air chamber 35 below a piston 36 in the air cylinder 35 is provided.
By connecting a to an air supply unit (not shown) via the port 35b, the piston 36 and the tension rod 34 are raised when air is supplied.

According to the jig 30, the jig 30 is mounted on the cylinder block 1 in a state where air is not supplied to the air cylinder 35, whereby the elastic seal member 33 is moved above the cylinder 1b. It is inserted into the opening (the state shown by the two-dot chain line in FIG. 4). Then, when air is supplied to the air cylinder 35, the plate body 34a is pulled up via the tension rod 35 as shown by a solid line in FIG. Accordingly, the elastic seal member 63 bulges outward, and the outer periphery thereof is pressed against the inner surface of the cylinder 1b. Thereby, sealing of the upper opening of the cylinder 1b is achieved. In this state, the housing cover 26a protrudes into the outer cylindrical portion 9 of the electrode 6, and the upper opening of the pellet housing 7 is closed, whereby the pellet 10 from the pellet housing 7 during plating is closed. Is prevented from jumping out.

FIG. 5 shows a third embodiment of the apparatus according to the present invention.

In this figure, a jig 40 has a plate 41 abutting on the upper end of the cylinder block 1 at a position corresponding to each cylinder 1b of the cylinder block 1.
A column-shaped mounting member 42 is provided from below to near the upper opening of the cylinder 1b, and a flat air tube 43 is mounted to a lower end of the mounting member 42. The outer periphery of the air tube 43 comes into pressure contact with the inner peripheral surface of the cylinder when air is supplied to the inside and compressed vertically.

The mounting member 42 has an air port 44 connected to an air supply unit (not shown) and an air passage 45 communicating with the air port 44 and passing through the center of the mounting member 42. Is connected to the inside of the air tube 43 through the communication hole 76.

Further, a tension rod 47 vertically penetrating the mounting member 42 is provided so as to be vertically movable with respect to the jig 40, and a plate body located on the lower surface of the air tube 43 at the lower end of the tension rod 47. At the same time, a storage portion cover 26b having substantially the same configuration as the storage portion cover 26 is mounted on the lower surface of the plate body 47a. On the other hand, tension rod 47
Is connected to a piston 49 of an air cylinder 48 provided above the jig 40. The air cylinder 48 raises the piston 49 and the tension rod 47 when air is supplied by connecting an air chamber 48a below the piston 49 to an air supply unit (not shown) via a port 48b. It has become.

According to the jig 40, the jig 40 is mounted on the cylinder block 1 in a state where air is not supplied to the air tube 43 and the air cylinder 48. (In a state shown by a two-dot chain line in FIG. 5). Then, by supplying air to the air tube 43 and the air cylinder 45, the plate 34a is pulled up and the air tube 43 is compressed up and down as shown by the solid line in FIG. As a result, the air tube 43 bulges outward, and its outer periphery is pressed against the inner surface of the cylinder 1b. Thereby, sealing of the upper opening of the cylinder 1b is achieved. In this state, the storage unit cover 26
b is inserted into the outer cylindrical portion 9 of the electrode 6 to close the upper opening of the pellet storage portion 7, thereby preventing the pellet 10 from jumping out of the pellet storage portion 7 during plating.

FIG. 6 shows a fourth embodiment of the apparatus according to the present invention.

In this figure, a jig 50 is provided with a column-shaped mounting member 51 which reaches the vicinity of the upper opening of the cylinder 1b below a plate abutting on the upper end of the cylinder block 1, and a lower end of the mounting member 51. The projecting member 53
Is attached, and a storage section cover 26c having substantially the same configuration as the storage section cover 26 is mounted below the holding frame 52. The holding frame 52 is formed in a shape having a U-shaped cross section that is opened in the radial direction in a peripheral portion on the lower surface side of a circular plate slightly smaller in diameter than the cylinder 1b. The projecting member 53 includes:
For example, the holding frame 52 is made of, for example, an annular shrink rubber, and is held in a fitted state on the frame portion of the holding frame 52.

In the holding frame 52, a liquid introduction chamber 54 is formed in a frame portion inside the projecting member 53, and a liquid inlet 55 is provided on the inner peripheral side of the liquid introduction chamber 54. The projecting member is bulged (projected) outward by using the plating solution flowing in the cylinder 1b by the liquid introducing chamber 54 and the liquid inlet 55.

According to the jig 50, the housing cover 26 c is pushed into the outer cylindrical portion 9 of the electrode 6 in a state where the cylinder block 1 is supported on the support block 4, and The opening is closed, thereby preventing the pellet 10 from jumping out of the pellet storage section 7 during plating. Further, when the circulation of the plating solution is performed, the flow path 14 is connected to the flow path 1 in the cylinder 1b.
5, a part of the plating solution flows into the solution introduction chamber 54 via the housing cover 26c and the solution introduction port 55, and the projecting member 53 expands radially outward by the solution pressure. The outer peripheral surface is pressed against the inner surface of the cylinder 1b. Thereby, sealing of the upper opening of the cylinder 1b is achieved.

FIG. 7 shows a fifth embodiment of the apparatus according to the present invention.

In this figure, a jig 60 is provided with a column-shaped mounting member 61 which reaches the vicinity of the upper opening of the cylinder 1b below the plate abutting on the upper end of the cylinder block 1, and a lower end of the mounting member 61. A holding frame 62 having substantially the same shape as the holding frame 52 in the fourth embodiment is attached to the storage unit cover 2, and the storage unit cover 2 having substantially the same configuration as the storage unit cover 26 is provided below the holding frame 62.
6d is attached. A protruding member 63 made of a rubber tube is fixed to the outer peripheral side of the U-shaped frame portion of the holding frame 62. A liquid introducing chamber 64 is formed inside the projecting member 63 in the holding frame 62, and a liquid inlet 65 is formed inside the liquid introducing chamber 64.
Is provided.

Also in the case of this jig 60, the support block 4
With the cylinder block 1 supported above, the housing cover 26d protrudes into the outer cylindrical portion 9 of the electrode 6, and the upper opening of the pellet housing 7 is closed, whereby the pellet housing during plating is closed. The pellet 10 is prevented from jumping out of the nozzle 7. Also, when the plating solution is circulated, a part of the plating solution flowing from the flow path 14 to the flow path 15 flows into the liquid introduction chamber 64 through the housing cover 26d and the liquid introduction port 65, and The outer peripheral surface is pressed against the inner surface of the cylinder 1b by swelling the projecting member 53 radially outward by pressure. This achieves sealing of the upper opening of the cylinder 1b.

FIG. 8 shows a sixth embodiment of the apparatus according to the present invention.

In this figure, a jig 70 is provided with a column-shaped mounting member 71 which reaches the vicinity of the upper opening of the cylinder 1b below a plate abutting on the upper end of the cylinder block 1, and a lower end of the mounting member 71. A conical and annular air tube 73 is attached to the holding member 72 by a holding member 72, and the storage portion cover 26 is provided below the holding member 72.
The storage unit cover 26e having substantially the same configuration as that described above is attached.

The mounting member 71 is formed with an air port connected to a negative pressure supply unit (not shown) and an air passage 74 communicating with the air port and passing through the inside of the mounting member 71.
The lower end of the air passage 74 communicates with the inside of the air tube 73 via the communication hole 75.

According to the jig 70, the jig 70 is mounted on the cylinder block 1 in a state where the negative pressure is supplied to the air tube 73, whereby the air tube 73 is reduced in diameter. It is inserted into the upper opening of the cylinder 1b (the state shown by the solid line in FIG. 8). Then, when the supply of the negative pressure to the air tube 73 is cut off, as shown by a two-dot chain line in FIG.
Bulges outward, and its outer periphery is pressed against the inner surface of the cylinder 1b. Thereby, sealing of the upper opening of the cylinder 1b is achieved. In this state, the housing cover 26e protrudes into the outer cylindrical portion 9 of the electrode 6, and the upper opening of the pellet housing 7 is closed, whereby the pellet 10 from the pellet housing 7 during plating is closed. Is prevented from jumping out.

The embodiment described above is an example showing the configuration of the plating apparatus of the present invention, and the specific structure can be changed as appropriate without departing from the spirit of the present invention. For example, in the above embodiment, the pellet storage unit 7
Although hollow storage portion covers 26, 26a to 26e made of a porous metal plate or the like are applied as a closing member for the upper opening portion, a plate-shaped storage portion cover may be formed. However, the hollow storage section cover has an advantage that the rigidity against the plating solution pressure is higher than that of the plate-shaped storage section cover. Further, it is desirable to use a mesh-like material as the porous metal plate constituting the storage unit covers 26, 26a to 26e from the viewpoint of the circulation of the plating solution.

[0057]

As described above, according to the present invention, a work supporting portion for supporting a work so as to close a lower opening of a cylindrical portion of the work, and a work which is inserted into the cylindrical portion while the work is supported is provided. And an electrode to be provided, and within the electrode body of this electrode,
A pellet storage portion for storing a pellet made of a soluble anode material, and an opening for introducing a pellet are provided, while a seal member attached to the work at the time of plating, the work is supported by the work support portion. In the plating state, a closing member for closing the opening for introducing the pellet of the electrode is provided, so that at the time of plating, the opening for introducing the pellet formed on the electrode is closed by the closing member, whereby the pellet from the electrode is removed. Outflow is reliably prevented. On the other hand, when the workpiece and the sealing member are removed and the plating is not performed, the opening for introducing the pellet of the electrode is in an open state, whereby the replenishment of the pellet to the pellet storage portion is improved.

In such a configuration, the electrode body of the electrode is composed of an inner cylindrical portion and an outer cylindrical portion, and a pellet accommodating portion is provided between the inner and outer cylindrical portions, and a pellet introduction portion is provided at an upper end thereof. While forming the opening, the closing member is formed from a porous member that allows the plating solution to flow, and in a state where the work is supported by the work supporting portion, the closing member covers the upper end of the electrode. It is arranged, furthermore, the space outside the outer cylindrical portion of the electrode and the space inside the inner cylindrical portion serve as the flow path of the plating solution, and these flow paths communicate with each other at the upper end of the electrode via the closing member. With this configuration, plating can be performed at a high speed while flowing the plating solution, and the outflow of the pellets from the pellet storage portion due to the flow of the plating solution can be appropriately prevented. In addition, at the time of non-plating, the work and the seal member are removed, so that the opening of the pellet accommodating portion is opened, so that the pellet can be easily supplied from the upper end of the electrode into the pellet accommodating portion.

Further, if the closing member is formed in a hollow shape, the rigidity of the closing member against the liquid pressure of the flowing plating solution can be increased.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a plating apparatus according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is an enlarged sectional view of FIG. 1 showing a sealing member of the jig.

FIG. 4 is an enlarged sectional view of a main part showing a second embodiment of the plating apparatus according to the present invention.

FIG. 5 is an enlarged sectional view of a main part showing a third embodiment of the plating apparatus according to the present invention.

FIG. 6 is an enlarged sectional view showing a main part of a fourth embodiment of the plating apparatus according to the present invention.

FIG. 7 is an enlarged sectional view of a main part showing a fifth embodiment of the plating apparatus according to the present invention.

FIG. 8 is an enlarged sectional view of a main part showing a sixth embodiment of the plating apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder block 1b Cylinder 2 Plating apparatus main body 4 Support block 5 Treatment liquid lead-out passage 6 Electrode 7 Pellet storage part 8 Inner cylinder part 8a Cover 9 Outer cylinder part 10 Pellet 14, 15 Flow path 16 Processing liquid introduction passage 20 Jig 21 Plate DESCRIPTION OF SYMBOLS 22 Locking plate 23 Seal holding plate 24 O-ring 25 Rod 25a Screw part 26 Storage part cover 27 Nut member

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ identification code FI C25D 17/12 C25D 17/12 J (58) Investigated field (Int.Cl. ⁷ , DB name) C25D 17/00 C25D 5 / 02 C25D 7/04 C25D 17/08 C25D 17/12

Claims (3)

(57) [Claims] In a plating apparatus configured to supply a plating solution to an inner peripheral surface of a cylindrical portion of a work having a cylindrical portion and perform plating, a lower opening of the cylindrical portion is formed in a plating apparatus main body. A work support portion that supports the work so as to close the portion, and an electrode that protrudes into the cylindrical portion in a state where the work is supported, is provided, and the electrode is a cylindrical electrode main body, and inside the electrode main body. A sealing member is provided for accommodating a large number of pellets made of a soluble anode material, and an opening for introducing a pellet, and is provided on the work at the time of plating to seal an upper opening of the cylindrical portion. And a sealing member for closing the opening of the electrode while the work is supported by the work supporting portion. 2. An electrode body for an electrode comprising an inner cylindrical portion and an outer cylindrical portion, wherein a pellet accommodating portion is formed between the inner and outer cylindrical portions, and the opening is provided at an upper end thereof. The closing member is formed of a porous member that allows a plating solution to flow therethrough, and is arranged so that the closing member covers the upper end of the electrode while the work is supported by the work supporting portion. And a space outside the outer cylinder portion and a space inside the inner cylinder portion of the electrode body serve as a plating solution flow path, and these flow paths are connected to a plating solution supply section. The plating apparatus according to claim 1, wherein the plating apparatus is configured to communicate with a plating solution discharge pipe and communicate with each other at an upper end portion of the electrode via the closing member. 3. The plating apparatus according to claim 2, wherein said closing member is formed in a hollow shape.