JP2716741B2 - Electroplating equipment for long workpieces - Google Patents

Description

The present invention relates to an electroplating apparatus for a long work.

(Prior art) As long work, for example, thin rod
When electroplating a work having a length of about 1 m to 3 m, for example, the work is hung on a rack for each of a plurality of lots and immersed in a plating tank. However, in the hanging type plating apparatus as described above, the plating thickness tends to vary between the upper and lower ends and the center of the work, and the work efficiency is not good. It is also difficult to make the plating tank itself compact.

On the other hand, as an apparatus for continuously plating a work material such as a strip, an apparatus for forming a work inlet and a work outlet at both ends of a plating tank and continuously passing the work has been developed. However, when plating a long work such as a cylinder or a round bar with such an apparatus, the plating thickness tends to vary in the circumferential direction of the work.

The current density is improved and uniformized by stirring in the plating tank, but it is not sufficient.

(Purpose of the Invention) An object of the present invention is to achieve uniform plating thickness in the longitudinal direction and circumferential direction of a workpiece and thereby improve the quality when plating a long cylindrical or rod-shaped workpiece, and to perform a plating operation. The aim is to improve efficiency and make the equipment space compact.

(Technical Means for Achieving the Object) In order to achieve the above object, the invention according to claim 1 of the present application provides a work inlet and a work outlet at both ends in the work feeding direction of a plating tank into which a plating solution has been injected. In the electroplating apparatus for a long work in which an anode plate is formed on both sides of a work passage passage in a plating tank, a drive shaft inclined with respect to the axis of the cylindrical or round bar-shaped work on the work inlet side of the plating tank. And a drive roller that presses against the outer peripheral surface of the work is fixed to the drive shaft, and the rotation of the drive roller causes the work to rotate and move in the length direction.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, a plating solution jet tube is disposed in a plating tank.
The jet pipe is provided with a plurality of nozzles for spraying a jet of a plating solution onto a workpiece that is passing therethrough.

According to a third aspect of the present invention, there is provided the plating solution jetting tube according to the second aspect of the present invention located below the work passage.
The nozzle portion is arranged so as to spray the plating solution upward from below with respect to the workpiece.

According to a fourth aspect of the present invention, there is provided a plating solution jetting tube according to the second aspect of the present invention, which is located on the left and right sides of a work passage passage, and a plurality of nozzle portions are provided on the left and right sides of the workpiece with respect to the plating solution. Are arranged to erupt.

According to a fifth aspect of the present invention, in addition to the first aspect, a tubular jet duct is arranged in the plating tank so as to surround the work, and a plating solution circulation pump is connected to the jet duct. This allows the plating solution to flow at high speed in the duct along the length direction, and a number of current passage holes are formed in the peripheral wall of the duct to allow current to pass between the work inside the duct and the anode plate outside the duct. doing.

(Function) The cylindrical or round bar-shaped long work is fed into the plating tank in the length direction while rotating at a constant speed by the rotation of the inclined drive roller of the drive mechanism, and is continuously rotated while rotating in the plating tank. Plated on.

According to the inventions described in claims (2), (3), and (4), the supply of ions to the surface of the work is promoted by spraying the jet of the plating solution onto the work passing through the plating tank, thereby increasing the current. Density is ensured.

Further, in the invention according to claim (5), a high current density is secured by the plating solution flowing at high speed in the duct.

(Embodiment) FIGS. 1 to 7 are overall perspective views of an electroplating apparatus to which the invention described in claims (1), (2) and (3) of the present application is applied. In FIG. Assuming that the direction side is the front side, the plating tank 1 is disposed above the plating solution sub-tank 2, and the plating tank 1 is formed in a box shape having an open upper surface and a long box in the front-rear direction. It is formed in a box shape wider than 1 and has an open upper surface.

An entrance-side first support mechanism 10a, a work drive mechanism 8, and an entrance-side second support mechanism 10b are arranged in this order from the rear on the rear side of the plating tank 1. The exit-side support mechanism 10c is located on the front side of the plating tank 1. Is arranged.

A work inlet 5 is formed at the rear end wall of the plating tank 1 and a plating solution outlet 18 is formed above the work inlet 5. A plating solution return port 20 is formed at the upper end of the rear end wall of the sub tank 2. The return port 20 is connected to the plating solution outlet 18 of the plating tank 1 by a communication pipe.

A work outlet 6 is formed at a position corresponding to the work inlet 5 on the front end wall of the plating tank 1 and a plating solution supply port 17 is formed at a lower end portion, and a plating solution suction is formed at a lower end portion of the front end wall of the sub tank 2. A port 19 is formed, and the suction port 19 is connected to the plating solution supply port 17 of the plating tank 1 via a communication pipe and a plating solution circulation pump 12, and the plating solution is supplied from the sub tank 2 to the plating solution supply port 17 by the circulation pump 12. Is to be pumped.

In the plating tank 1, a straight line portion connecting the work inlet 5 and the work outlet 6 is a work passage passage P, and the anode plates 14 are arranged on both sides of the work passage passage P, and the anode plate 14 is, for example, suspended (not shown). It is suspended by bars and the like. A plating solution jetting pipe 23 extending in the front-rear direction over the entire length of the plating tank 1 is disposed below the work passage P, and a front end of the jetting pipe 23 is connected to the plating solution supply port 17 and a rear end thereof. The part is closed. A plurality of upward nozzles 24 are provided on the upper surface of the ejection pipe 23 at intervals in the front-rear direction.

In FIG. 3 showing a vertical sectional view of FIG. 1, a plating solution is provided in the plating tank 1 and the sub-tank 2, respectively.
No. 1 and L2 are injected, and the nozzle portions 24 are arranged so that the plating solution is ejected to the work W being passed from substantially right below and vertically upward.

FIG. 2 shows the work drive mechanism 8 and the work support mechanisms 10a and 10b.
FIG. 2 shows a plan view of the driving motor
The reference numeral 35 denotes a desired angle θ1 of the drive shaft 36 with respect to the workpiece W.
It is inclined. A drive roller 37 made of synthetic resin or hard rubber is fixed to the drive shaft 36 on the same axis as the drive shaft 36,
The driving roller 37 presses against the upper surface of the workpiece W, and the driving roller 37
By rotating the work W in the R direction, the work W is fed forward while rotating in the S direction. Drive roller 37
May be arranged one above the other so that the workpiece W is driven from above and below.

The drive motor 35 is provided with bolts 46 on the vertical portion 31 of the motor mounting plate 30.
And a nut 47. The mounting plate 30 is rotatably mounted on the gantry 29 around a vertical fulcrum shaft bolt 40 as a rotation center, and a bolt 43 inserted into an arc-shaped long hole 41 about the fulcrum shaft bolt 40. And base with nut 44
Fixed to 29. That is, by adjusting the rotation of the mounting plate 30 about the fulcrum shaft bolt 40, the inclination angle θ1 of the axis of the drive roller 37 with respect to the work W can be changed.

The first support mechanism 10a includes support rollers 55 rotatably supported by a vertical bracket 50 on both sides of the work W, and the axis of the support rollers 55 has the same inclination with respect to the work as the inclination angle of the drive axis. It is inclined at an angle θ2 and on the side opposite to the drive shaft 36. A horizontal mounting plate 49 is formed integrally with the bracket 50. The mounting plate 49 is rotatable about a fulcrum shaft bolt 62 as a rotation center, similarly to the mounting plate 30 for the drive motor 35.
And is fixed to the gantry 29 by bolts 53 and nuts 54 inserted into the arc-shaped long holes 51. That is, by adjusting the rotation of the mounting plate 49, the inclination angle θ2 and the work supporting height can be changed. The second support mechanism 10b and the outlet-side support mechanism 10c in FIG. 1 have the same structure. FIG. 5 is a view of the support mechanism 10a as seen from an arrow V in FIG.

FIG. 4 is a view taken in the direction of arrow IV in FIG. 2. The drive motor mounting bolts 46 are inserted into long holes 48 above and below the bracket 31, so that the drive motor can be driven in accordance with the diameter or the supporting height of the work W. The vertical position of the motor 35 is adjusted.

FIG. 6 is a longitudinal sectional view of the work outlet 6. The seal 26 has a work passage slit 28 and a lower seal 26.
a is provided separately, and the work W is allowed to pass by pushing and expanding the slit 28 as shown in FIG. The inlet side seal 26 of FIG. 1 has a similar structure.

The plating operation and the circulation of the plating solution will be briefly described. As the round bar-shaped work, for example, a work in which cylinder rods are sequentially connected in the length direction by screwing is used. The work W is supplied with negative electricity by a power supply device (not shown) and is sent forward while rotating in the S direction by the rotation of the drive roller 37 in the R direction shown in FIG. And plating is performed while passing through the plating solution in the plating tank 1. At this time, since the work W rotates at a constant speed and moves forward, plating is applied to a uniform thickness in the circumferential direction and the length direction of the work W. Then, it is taken out from the work outlet 6 in FIG.

Assuming that the outer diameter of the drive roller 37 in FIG. 2 is D, the workpiece W rotates while one rotation of the drive roller 37 rotates the II Dcos (9
0-θ1) Move forward. The number of rotations of the work W is inversely proportional to the diameter of the work, and is proportional to the diameter of the drive roller.

During the plating operation, the plating solution sucked from the sub-tank 2 by the circulation pump 12 is pumped from the plating solution supply port 17 into the plating tank 1 into the ejection pipe 23 and ejected from each nozzle portion 24 toward the upper workpiece W. Is done. Thereby, the supply of ions to the work surface is promoted, the current density increases, the plating speed increases, and the plating operation efficiency improves.

The plating solution in the plating tank 1 overflows from the plating solution outlet 18 and is returned to the sub tank 2. The plating solution leaking from the work inlet 5 and the work outlet 6 falls into the sub tank 2.

(Embodiment of the Invention According to Claim 4) FIGS. 8 and 9 are vertical sectional views of a plating apparatus to which the invention according to claim 4 is applied. The plating apparatus of FIG. The structure is different.

That is, a pair of left and right plating solution jetting pipes 61 are disposed at the bottom of the plating tank 1, and each jetting pipe 61 has a rising pipe extending upward.
A plurality of nozzle portions 24 are provided on each riser tube 62 at intervals in the up-down direction.
24 is open toward the work side. The front end of the ejection source pipe 61 is connected to the plating solution circulation pump 12 via the plating solution supply port 17. A plurality of riser pipes 62 are provided at intervals in the front-rear direction as shown in FIG. That is, in the apparatus shown in FIGS. 8 and 9, the plating solution is ejected from both the left and right sides to the work W passing through the plating tank 1.

Other structures are the same as those of the plating apparatus of FIG. 1, and the same parts are denoted by the same reference numerals. Of course, a drive mechanism as shown in FIG. 2 is provided.

(Embodiment of Invention of Claim 5) FIG. 10 shows a plating apparatus to which the invention of claim 5 is applied, in which a plating solution jet duct 70 is provided instead of the plating solution ejection pipe as shown in FIG. Then, the workpiece W is rotated and passed through the duct 70.

That is, a jet duct 70 extending in the front-rear direction is arranged in the plating tank 1 so as to surround the work passage P, and the front end 70a of the jet duct 70 is connected to the plating solution circulation pump 12 through the plating solution supply port 17, The rear end of the jet duct 70 is closed. A large number of small holes 71 for passing current are formed in the peripheral wall of the jet duct 70 as shown in FIG. 12, and between the anode plates 14 on both sides and the work W in the duct 70 as shown in FIG. Electric current is conducted.

Other structures are the same as those of the plating apparatus of FIG. 1, and the same parts are denoted by the same reference numerals. Of course, a drive mechanism as shown in FIG. 2 is provided.

In this structure, the plating solution flows at a high speed from the front to the back in the duct 70, and the high-speed flow of the plating solution promotes the supply of ions to the work surface, thereby increasing the current density.

Also, the plating solution in the duct 70 is discharged into the plating tank 1 through a number of small holes 71, and the plating solution outlet 18 is used to
Is returned to.

Other Embodiments (1) As the work supporting mechanism, various types of bearings that can guide rotation and movement in the length direction, such as a pair of ball-type bearings, can be used.

(Effects of the Invention) As described above, according to the invention of the present application: (1) A long workpiece having a cylindrical or rod shape is continuously passed through the plating tank 1 while being rotated at a constant speed by the workpiece drive mechanism 8. It is possible to improve the uniformity of the plating thickness in the circumferential direction and the length direction of the work W as compared with the conventional structure of hanging and dipping each lot. Product quality can be improved.

(2) Since the work W is continuously passed through the plating tank 1, the equipment space can be made compact and the work efficiency can be improved.

According to the inventions described in claims (2) to (5), the following effects can be expected in addition to the above effects.

(1) Since the jet of the plating solution is hit against the work W moving in the plating tank 1 from below or from both sides, or the work is passed through the jet duct 70 through which the plating solution flows at a high speed. The supply of ions to the surface of the work is promoted by the jet flow or the like, whereby the current density is increased, the plating speed is increased, and the plating operation efficiency is further improved.

[Brief description of the drawings]

1 is an overall perspective view of a plating apparatus to which the claims (1), (2) and (3) of the present invention are applied, FIG. 2 is a plan view of a work drive mechanism, and FIG. 3 is a schematic vertical sectional view of FIG. And FIG.
FIG. 5 is a view taken in the direction of the arrow IV, FIG. 5 is a view taken in the direction of the arrow V in FIG. 2 of the support mechanism, FIG. 6 is an enlarged longitudinal sectional view of the outlet portion of the plating tank, FIG. FIG. 8 is a vertical sectional view of a plating apparatus to which claim (4) is applied, FIG. 9 is a partial view taken along the arrow IX of FIG. 8, and FIG. 10 is an overall perspective view of a plating apparatus to which claim (5) is applied. FIG. 11 is a vertical sectional view of the jet duct of FIG. 10, and FIG.
FIG. 12 is a partially enlarged side view of the jet duct of FIG. 1
… Plating tank, 5… Work inlet, 6… Work outlet,
8 Work drive mechanism, 14 Anode plate, 23 Plating solution jet tube, 24 Nozzle, 35 Drive motor, 36 Drive shaft, 37 Drive roller, 61 Plating solution Squirting pipe, 62
… Rise pipe, 70… Plating solution jet duct, 71… Small hole for passing current

Claims (5)

(57) [Claims] An electroplating apparatus for a long work, wherein a work inlet and a work outlet are formed at both ends of a plating bath into which a plating solution is injected in a work feeding direction, and anode plates are arranged on both sides of a work passage in the plating bath. A work drive mechanism having a drive shaft inclined with respect to the axis of the cylindrical or round bar-shaped work is arranged on the work entrance side of the plating tank, and a drive roller pressed against the outer peripheral surface of the work is fixed to the drive shaft. And an electroplating apparatus for a long work in which the work is rotated and moved in the length direction by the rotation of a driving roller. 2. A plating solution jet pipe is arranged in a plating tank, and the jet pipe is provided with a plurality of nozzles for spraying a jet of a plating solution onto a work passing through the plating tank. Electroplating equipment for long workpieces. 3. A plating solution jetting pipe according to claim 2, wherein the plating solution jetting pipe is located below the work passage in the plating tank, and the nozzle portion is arranged so as to jet the plating solution upward from below the work. Electroplating equipment for long workpieces. 4. The method according to claim 2, wherein the plating solution jetting pipes are located on both left and right sides of the work passage, and a plurality of nozzles are arranged so as to jet the plating solution to the work from both left and right sides. Electroplating equipment for long workpieces. 5. A tubular jet duct is arranged in a plating tank so as to surround a workpiece that is passing therethrough, and a plating solution circulation pump is connected to the jet duct so that the duct flows along the lengthwise direction in the duct. The electric power for a long work according to claim 1, wherein a large number of current passage holes are formed in the peripheral wall of the duct for flowing a plating solution at a high speed and for passing an electric current between a work in the duct and an anode plate outside the duct. Plating equipment.