JPH0454224Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electroplating device, and more particularly to an improvement of a barrel-type electroplating device that rotates about a horizontal axis.

[Conventional technology]

Devices that perform plating by placing the object to be plated in a horizontally installed barrel so as to be in contact with the cathode electrode include the horizontal rod contact type (Center rod contact type) and the dangler type (Dangler type) depending on the installation state of the cathode electrode. Dangler contact), Bottom contact type (Bottom
Various types are provided, such as contact type, side contact type, and glide type.

However, these methods have the following problems.

Since a large number of electric wires and electrode rods are installed inside the barrel, if the object to be plated gets caught, it is likely that the object to be plated will be damaged or bent during plating or removal work.

Since the contact area between the cathode electrode and the object to be plated is small, the thickness of the plating layer becomes uneven.

As the plating time passes, the plating metal adheres to the surface of the cathode electrode and gradually expands, and the anode electrode wears out. In particular, when plating is performed by rotating the barrel in a bottom electrode type plating device, the object to be plated only contacts the electrode that is on the bottom side and not the electrode that is on the top side. At times, plating metal concentrates on the electrode surface (so-called dry electrodeposition) and rapidly enlarges the electrode, making it necessary to replace the electrode in a short period of time, which greatly reduces work efficiency. descend.

In order to prevent static electrodeposition, it is necessary to properly adjust the level of the plating solution so that the upper electrode is not immersed in the plating solution. bluing solution, stannous sulfate solution, etc.) are not suitable for such liquid level adjustment.

The efficiency is lower than that of hitkakemetsu due to insufficient distribution of the plating liquid inside the barrel.To improve this, many holes are made in the wall of the barrel, but there is a limit to this (in terms of area ratio up to about 30%).

[Problem that the invention attempts to solve]

The present invention was developed to solve the above-mentioned problems, and its purpose is to prevent the anode electrode from being worn out and the cathode electrode from becoming enlarged, thereby eliminating the need to replace the electrodes frequently. We have created an electroplating device that is capable of long-time plating, greatly improves work efficiency, and is capable of high-quality plating with a uniform plating layer due to the continuous supply of plating liquid. It is about providing.

[Means for solving problems]

The above purpose is achieved by using the components mentioned in paragraphs (a) to (1) below, namely: (a) a pair of frame plates fixed to each other; and (b) a rotation between one frame plate and the other frame plates. (c) an end face plate closing both ends of said barrel; and (d) an end face plate formed on the side opposite to the side on which said barrel is attached to the frame plate. (e) a plurality of axially extending electrode rods arranged at equal angular intervals inside the barrel near each vertex; and (f) a side of the barrel attached to the frame plate. A distribution board is mounted on the opposite end panel so as to be located within its waterproof hood, and has a plurality of contact pieces connected to each of the electrode rods arranged at equal angular intervals on the same radius; ) a waterproof lid that closes the open end of the waterproof hood, and (h) a waterproof lid that is attached to the frame plate on the opposite side to the side where the barrel is attached, and whose inner end passes through the center hole of the waterproof lid. (i) an electric wire introduction tube extending into the waterproof hood, into which two electric wires extending from the outside of the frame plate to the inside of the waterproof hood are inserted; a brush holder attached to the inner end; (j) a distribution board attached to the brush holder and connected to each of the two electric wires, and at a vertically symmetrical position sandwiching the central axis of rotation of the distribution board; (k) an upper anode brush and a lower cathode brush that respectively contact contact pieces located at symmetrical positions on the upper and lower sides; (k) a barrel drive mechanism that is attached to a frame plate to which the barrel is attached and rotates the barrel; (1) A pump that is driven in conjunction with the barrel and supplies the plating liquid into the barrel from the rotation center hole in the attachment part of the barrel; .

The brush holder has bifurcated parallel arms extending vertically, and the mounting positions of the anode and cathode brushes attached to each arm can be adjusted. It is recommended to use carbon brushes as the brushes. be done.

A screw thread is formed on the outer periphery of the electric wire introduction tube, and the electric wire introduction tube is fixed to the frame plate by screwing nuts from the inside and outside of the frame plate, and by adjusting the screwing amount of the nut, It is recommended that the distance between the brush holder attached to the inner end of the tube and the distribution board be adjustable.

Furthermore, it is recommended that the barrel and the pump be connected by gears so that they are interlocked.

It is recommended that the pump has flexible rotating vanes.

[Effect]

With the above configuration, each electrode rod comes into contact with the cathode brush via the distribution board when it comes to the bottom as the barrel rotates, and becomes a cathode electrode, and when it comes to the top, it comes into contact with the cathode brush. Since it becomes an anode electrode, one electrode rod changes into a cathode and an anode alternately,
Therefore, when it becomes a cathode, plating metal is attached, but when it becomes an anode, it is removed, so the electrode rod does not swell or wear out, and there is no need to replace the electrode rod.

Further, the plating metal ions are replenished by the plating liquid that is continuously supplied into the barrel by the pump during the plating process.

〔Example〕

Hereinafter, the configuration of the present invention will be specifically explained with reference to the drawings.

Fig. 1 is an exploded perspective view of an embodiment of the electroplating device according to the present invention, Fig. 2 is a sectional view showing the assembled state, and Fig. 3 is a partially broken view of the barrel viewed from the axial direction. 4 are explanatory diagrams showing one embodiment of a pump having a flexible rotary vane used in the electroplating apparatus of the present invention.

In the figure, 1 and 1' are frame plates, 2 is a barrel, 21 and 21 are electrode rods, 22 and 22' are end plates, 23 is a waterproof hood formed on the end plate 22, and 2.
5 is a waterproof lid, 28 is an electric wire introduction pipe, and 3 is a polarity switching device. 32 is an anode brush, 33 is a cathode brush, 35
is the distribution board, and 4 is the pump.

A pair of frame plates 1 and 1' have a plurality of support columns 1
1 and bolts 12, and a regular polygonal cylindrical barrel 2 is provided between both frame plates. The barrel 2 is rotatably mounted to the frame plate 1'. The barrel 2 is formed by joining together a plurality of plastic plates (six in the illustrated embodiment) with a large number of small holes, and both ends of the barrel 2 are closed by end plates 22 and 22', respectively.
A waterproof hood 23 is formed on the end plate 22 on the opposite side to the side where the barrel 2 is attached to the frame plate 1'.

An electrode rod 21 made of an anode metal corresponding to the type of plating is attached to the inside of each vertex 20 of the barrel 2, and one end of each electrode rod passes through a hole made in the end plate 22. The distribution board 3, which will be described later,
It is fixed at 5.

A waterproof gasket 24 and a waterproof lid body 25 are attached to the open end of the waterproof hood 23. A center hole 251 is formed in the waterproof lid body 25,
The shaft collar 26 is inserted through this. A flange 261 is formed at one end of the shaft collar 26, and a screw thread 262 is formed on the outer periphery of the other end, and by screwing the female thread 271 of the nut 27 into this, the shaft collar 26 is attached to the waterproof lid. It is adapted to be fixed in the center hole of the body 25.

Thus, the inner end of the wire introduction pipe 28 is inserted into the center hole of the shaft collar 26, and the shaft collar 26
Waterproofness between the shaft collar 26 and the wire introduction pipe 28 is maintained by an O-ring 264 fitted into a groove 263 formed on the inner periphery of the shaft collar 26.
Thereby, the waterproof lid 25 is rotatably connected to the wire introduction pipe 28. That is, the barrel 2 is rotatably connected to the wire introduction pipe 28 while the waterproof hood 23 is maintained waterproof by the waterproof cover 25.

A thread 281 is formed on the outer periphery of the wire introduction pipe 28, and this part is inserted into the hole 101 of the frame plate 1. A nut 29 having a female thread 291 is screwed in from the front side of the frame plate 1, and a nut 29 having a female thread 291 is inserted from the back side.
By holding with nut 29' having 1',
The electric wire introduction pipe 28 is fixed to the frame plate 1. Therefore, the thread 2 of the wire introduction pipe 28
By changing the screwing position of nuts 29 and 29' relative to 81, the length of the wire introduction tube 28 protruding into the inside of the frame plate 1 can be changed. The attached brush holder 310 and distribution board 3, which will be described later
The contact state of the brushes 32 and 33 attached to the brush holder 310 with respect to the electricity distribution board 35 can be adjusted to be optimal.

The inside of the electric wire introducing tube 28 is filled with an insulating material, and two electric wires are inserted therethrough, and these electric wires are introduced from the outside to the inside of the frame plate 1. One end of these two electric wires on the outside of the frame plate 1 is connected to conductive arms 18 and 1 having different polarities.
9, and one end of the inner end of the frame plate 1 passes through the wire introduction pipe 28 and is connected to terminals 282 and 283 provided at the inner end thereof, respectively. The conductive arms 18 and 19 are connected to the positive and negative electrodes of a plating DC power supply, respectively.

Then, the waterproof hood 2 is inserted through the waterproof lid body 25.
A brush holder 31 is attached to the inner end of the electric wire introduction pipe 28 that has advanced into the interior of the electric wire introduction tube 3, and an anode brush 32 and a cathode brush 33 are attached to this brush holder 31. A plurality of electrode rods 2 inside the barrel 2 by the plate 35
One polarity switching device 3 is configured.

The brush holder 31 has a central portion 310 formed in a circular shape with an outer diameter approximately equal to the outer diameter of the inner end of the wire introduction tube 28 , and two holes 311 and 312 formed in the center portion 310 of the wire introduction tube 28 . Terminals 282 and 283 are inserted and fixed, respectively, and conductive wires 321 and 331 of the anode and cathode brushes 32 and 33 are connected to these terminals 282 and 283, respectively. Brush holder 3
1 is formed with bifurcated parallel arms 313 and 314 extending upward and downward, an anode brush 32 is attached to the bifurcated parallel arm 313 extending upward, and a cathode brush is attached to the bifurcated parallel arm 314 extending downward. 33 is attached, and an anode brush 32 and a cathode brush 33 are attached to the brush holder 31 at vertically symmetrical positions. That is, a spring piece 322 is attached to the anode brush 32, and a spring piece 332 is attached to the cathode brush 33. 322 to the upper parallel arm 3
13 and inserted into the slit 316 of the lower parallel arm 314, the spring piece 332 of the cathode brush 33 is fixed to the lower parallel arm 314.
Therefore, by appropriately moving and fixing the screws 317 and 318 in the vertical direction within the slits 315 and 316, the mounting positions of the anode and cathode brushes 32 and 33 can be adjusted.

The upper anode brush 32 is connected to the electric wire connected to the positive electrode of the plating DC power supply among the two electric wires introduced through the electric wire introduction pipe 28, and the cathode brush 3
3 is connected to an electric wire connected to the negative electrode of a DC power source for plating.

Although various known brushes can be used as the anode brush 32 and the cathode brush 33, carbon brushes are particularly recommended.

The distribution board 35 is made up of a plurality of electrode rods 21 inserted into the barrel 2 and the same number of conductive contact pieces 351 connected via an insulator 352, and each contact piece 351 has an opening. By inserting and fixing one ends of the electrode rods 21 protruding from the end plate 22 into the holes, the electrode rods 21 are fixed to the end plate 22 within the waterproof hood 23.

Therefore, when the barrel 2 is rotated, the distribution board 35 also rotates, and among the plurality of contact pieces 351, the upper and lower contact pieces 351 are sequentially connected to the anode brush 32 and the cathode brush 33. Contact.
As a result, the electrode rod 2 has come to the upper side inside the barrel 2.
Reference numeral 1 serves as an anode electrode, and the lower electrode rod 21 serves as a cathode electrode, which contacts the object to be plated housed in the barrel 2 and performs the plating process on the object. .

At this time, when the electrode rod 21 is on the lower side, it becomes a cathode electrode and plating metal is attached to its surface, but when it moves upward, it becomes an anode electrode and the attached metal is electrolyzed and plated. It dissolves in the liquid, and because this process is repeated, the electrode rod 21 is prevented from becoming enlarged or worn out.

A tooth profile 221' is formed on the outer periphery of the end face plate 22' on the side of the frame plate 1' of the barrel 2, and a reduction gear 222' connected to a motor or other power source attached to the outside of the frame plate 1' is formed. By rotating, the barrel 2 can be rotated slowly during the plating process.

Furthermore, a pipe 4 for supplying plating liquid into the barrel 2 is attached to the outside of the frame plate 1'.
Gear 419 attached to rotating shaft 417 of pump 4
By connecting the tooth profile 221' of the end face plate 22 of the barrel 2, the pump 4 can be operated in conjunction with the rotation of the barrel 2.

The pump 4 houses a rotor 415 fixed to a rotating shaft 417 in a pump chamber 411 in a housing 41 fixed to the outer wall surface of the frame plate 1' via a backing 420.
15 has a flexible vane 416 made of rubber or soft plastic. The pump chamber 411 is connected to the rotating shaft 41 as shown in FIG.
7 as the center, one side thereof is an eccentric inner wall surface 412 with a short radius, so that the rotor 415
is rotated counterclockwise in the figure, the space 418 between the vanes 416 becomes the eccentric inner wall surface 412
When it reaches the area of the eccentric inner wall surface 412, the plating liquid becomes high pressure and is discharged from the discharge pipe 43, and when it passes the area of the eccentric inner wall surface 412, the plating liquid becomes high pressure and discharges from the discharge pipe 43.
14 to suck in external plating liquid through the suction pipe 42. As shown in FIG. 2, the discharge port of the discharge pipe 43 passes through the frame plate 1' and the end plate 22' and opens into the barrel at the center of rotation at the attachment point of the barrel 2 to the frame plate 1'. , whereby external plating liquid is supplied into the barrel 2. The plating liquid inside the barrel 2 is gradually discharged to the outside of the barrel 2 through several small holes formed in the outer peripheral wall surface of the barrel 2.

Therefore, when the barrel 2 is rotated during the plating process, the pump 4 is operated in conjunction with this, and fresh plating liquid is constantly supplied and replenished into the barrel 2, making it possible to perform high-quality plating processing. It is what it is.

[Effect of idea]

Since the present invention is constructed as described above, the present invention does not cause wear of the anode electrode or enlargement of the cathode electrode, eliminates the need for frequent electrode replacement, and allows long-time plating processing. Therefore, an electroplating apparatus is provided which can significantly improve work efficiency and perform high-quality plating processing with a uniform plating layer due to continuous supply of plating liquid.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, the shape of the barrel 2, its rotation mechanism,
Number of electrode rods 21, brushes 32, 33 and distribution board 3
5, the type of pump 4, etc., can be modified as necessary, and therefore, the present invention includes all modifications that can be easily conceived by a person skilled in the art from the above description within the scope of its purpose. Examples are included.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an embodiment of the electroplating device according to the present invention, Fig. 2 is a sectional view showing the assembled state, and Fig. 3 is a partially broken view of the barrel viewed from the axial direction. 4 are explanatory diagrams showing one embodiment of a pump having a flexible rotary vane used in the electroplating apparatus of the present invention. 1, 1'... Frame plate, 2... Barrel, 3...
... Cathode switching device, 4 ... Pump, 11 ... Support column,
101... hole, 12... bolt, 18, 19...
Conductive arm, 20... Vertex corner part, 21... Electrode rod,
22, 22'...End face plate, 221'...Tooth profile, 22
2'...Reduction gear, 23...Waterproof hood, 24...
...Waterproof packing, 25...Waterproof lid, 251...
...Center hole, 26...Shaft collar, 262...
Screw thread, 263...concave groove, 264...O ring,
27...Nut, 271...Female screw, 28...Wire introduction pipe, 281...Screw thread, 282,283...
...terminal, 29,29'... nut, 291,29
1'...Female screw, 31...Brush holder, 310
... Central part, 311, 312 ... Hole, 313,
314...Bifurcated parallel arm, 315, 316...
Slit, 317, 318...screw, 32...anode brush, 321...conducting wire, 322...spring piece,
33...Cathode brush, 331...Conducting wire, 332...
...Spring piece, 35...Distribution board, 351...Contact piece,
352... Insulator, 41... Housing, 411
... Pump chamber, 415 ... Rotor, 416 ... Vane, 417 ... Rotating shaft, 418 ... Space,
419...gear, 42...suction pipe, 420...packing, 43...discharge pipe.

Claims (1)

[Claims for Utility Model Registration] 1. An electroplating device characterized by comprising the components described in the following items (a) to (1). (a) A pair of frame plates 1, 1' fixed to each other. (b) A regular polygonal cylindrical barrel 2 rotatably attached to one of the frame plates 1' between the pair of frame plates 1 and 1'. (c) an end plate 22 that closes both ends of the barrel 2;
22′. (d) A waterproof hood 23 formed on the end plate 22 on the opposite side from the side where the barrel 2 is attached to the frame plate 1'. (e) A plurality of electrode rods 21 extending in the axial direction inside the barrel 2 and arranged at equal angular intervals near each vertex. (f) A plurality of contacts mounted on the end panel 22 on the opposite side of the barrel 2 from the side attached to the frame plate 1' so as to be located inside the waterproof hood 23, and connected to each of the electrode rods 21, respectively. Piece 3
51 are arranged on the same radius at equal angular intervals. (g) A waterproof lid body 25 that closes the open end of the waterproof hood 23. (h) It is attached to the frame plate 1 on the opposite side to the side on which the barrel 2 is attached, and its inner end passes through the center hole 251 of the waterproof lid 25 and extends into the waterproof hood 23. An electric wire introduction tube 28 into which two electric wires extending from the outside of the frame plate 1 to the inside of the waterproof hood 23 are inserted. (i) Brush holder 3 attached to the inner end of the electric wire introduction pipe 28 inside the waterproof hood 23
1. (j) Attached to the brush holder 31, connected to each of the two electric wires, and located at a vertically symmetrical position on the distribution board 35 across the rotation center axis of the distribution board 35. An upper anode brush 32 and a lower cathode brush 33 contact the contact piece 351, respectively. (k) A barrel drive mechanism that is attached to the frame plate 1' to which the barrel 2 is attached and rotates the barrel 2. (1) A pump 4 that is driven in conjunction with the barrel 2 and supplies plating liquid into the barrel from the rotation center hole in the mounting portion of the barrel 2. 2. The electric plating according to claim 1, wherein bifurcated parallel arms 313, 314 extending in the vertical direction are formed on the brush holder 31, and the mounting positions of the anode and cathode brushes 32, 33 mounted on each arm are adjustable. Device. 3. The electroplating apparatus according to claim 1, wherein the brushes 32, 33 are carbon brushes. 4. The wire introduction tube 28 is fixed to the frame plate 1 by forming a thread 281 on the outer periphery of the electric wire introduction tube 28, and screwing the nuts 29, 29' into this from the inside and outside of the frame plate 1. 2. The electroplating device according to claim 1, wherein the distance between the brush holder 31 attached to the inner end of the electric wire introduction pipe 28 and the electricity distribution board 35 can be adjusted by adjusting the amount. 5 Connect the barrel 2 and pump 4 to gears 221', 4
2. The electroplating apparatus according to claim 1, wherein the electroplating apparatus is connected by 19 to interlock the two. 6. Electroplating apparatus according to claim 1, wherein the pump 4 has flexible rotating vanes.