JP2769720B2 - Barrel plating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to, for example, electroplating and electroless plating on the surface of a synthetic resin button or other part (article to be plated) used by attaching to clothes. The present invention relates to a barrel plating apparatus that forms a predetermined plating layer.

(Prior Art) Conventionally, as a barrel plating apparatus of the above-mentioned example, for example,
There is an apparatus having the following structure.

That is, a pair of upright plates (frames) are provided facing each other at a predetermined interval, and a hexagonal cylindrical barrel rotatably driven by an AC motor is mounted between the pair of upright plates. This tubular barrel is a partially immersed horizontal barrel plating apparatus in which a tubular barrel wall is stretched between blind end face plates at both right and left ends, and the entire tubular barrel wall is formed of a perforated plate.

For example, when plating the surface of the above-mentioned parts using the above-described barrel plating apparatus having the conventional structure, the stirring of the parts is relatively difficult since the barrel plating apparatus only performs passive stirring by rotating the cylindrical barrel. Insufficiently, there is a problem that unevenness in plating thickness and poor adhesion of plating easily occur.

(Object of the Invention) According to the invention of claim 1 of the present invention, sufficient agitation of parts can be obtained by both agitation of parts by rotation of a cylindrical barrel and agitation of parts by a stirring rod. , The plating thickness is uniform, good plating without adhesion failure can be applied, and the parts corresponding to the input amount of parts, the mass and specific gravity of the parts to be injected into the cylindrical barrel, the shape of the parts, etc. It is an object of the present invention to provide a barrel plating apparatus capable of performing a stirring process along a good stirring trajectory, and particularly capable of separating parts having a flat suction surface from each other.

It is an object of the present invention to provide a barrel plating apparatus capable of arbitrarily and variably adjusting the inclination angle of each stirring rod to obtain a good stirring action for all parts. I do.

Another object of the present invention is to provide a barrel plating apparatus capable of satisfactorily separating parts that easily come into surface contact with the above-mentioned stirring rod by setting the cross-sectional shape of the stirring rod uniquely. I do.

(Constitution of the Invention) The invention according to claim 1 of the present invention is a barrel plating apparatus in which a cylindrical barrel is rotatably supported between a pair of spaced standing plates, and a shaft in the cylindrical barrel is provided. A non-rotating fixed rod is attached to the core, and a plurality of stirring rods are extended downward and fixed to the fixed rod, and the stirring rod is a cylindrical barrel with respect to a perpendicular passing through the center of the fixed rod. The barrel plating apparatus is characterized in that the inclination angle inclined in the rotation direction is fixedly set arbitrarily for each of the stirring rods.

According to a second aspect of the present invention, there is provided a barrel plating apparatus configured to arbitrarily variably adjust the inclination angle of each of the stirring rods in addition to the configuration of the first aspect of the invention. Features.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the cross-sectional shape of each of the stirring rods is such that the front side in the rotational direction of the cylindrical barrel is narrow, and The barrel plating apparatus is characterized in that the rear side is a barrel plating apparatus set in a shape having a part separation angle in which the width is widened.

(Effect of the Invention) According to the invention of claim 1 of the present invention, when the above-mentioned cylindrical barrel is rotated, parts in the barrel are positively agitated by the non-rotating agitating rod. Are well stirred by the synergistic effect of the passive stirring by the rotation of the cylindrical barrel and the positive stirring by the stirring rod.

As a result, sufficient agitation of the parts can be obtained,
There is an effect that the plating can be performed with a uniform thickness and good adhesion without adhesion failure.

In addition, since the inclination angles of a plurality of stirring rods are set arbitrarily fixed, the above-mentioned inclination angles are plated in advance according to the amount of parts to be introduced into the cylindrical barrel, the mass of the parts, the specific gravity, and the shape of the parts. By setting a subtle value according to the conditions, parts can be agitated along a good agitation trajectory.Parts with a flat suction surface are particularly agitated when they come into surface contact. However, there is an effect that the separation can be favorably performed by the plurality of stirring rods.

According to the invention described in claim 2 of the present invention, the inclination angle of each of the stirring bars is configured to be arbitrarily variably adjusted.
By changing the inclination angle of each of the stirring bars described above arbitrarily according to the type of parts to be charged into the cylindrical barrel and various plating conditions, the load on the cylindrical barrel driving means can be adjusted for all parts. There is an effect that a good stirring action can be obtained while reducing the rotational resistance of the barrel.

According to the third aspect of the present invention, since the cross-sectional shape of the above-mentioned stirring rod is set to a shape having a part separation angle, parts which are relatively easily in surface contact due to the shape of each of the stirring rods can be improved. Therefore, there is an effect that the part separation performance can be greatly improved.

Embodiment An embodiment of the present invention will be described below in detail with reference to the drawings.

The drawings show a partially immersed horizontal barrel plating apparatus. In FIGS. 1 and 2, a pair of frames 1, 2 which are erected and arranged at predetermined intervals are provided. Multiple stays 3 between the lower corners
... are connected.

A hexagonal cylindrical barrel 4 is rotatably supported at a lower portion between the pair of frames 1 and 2 so that its cylindrical axis is oriented in a horizontal direction. A motor base 6 is horizontally stretched between two frames 1 and 2 via two mounting members 5 and 5.

A DC gear motor 7 having a speed controller is mounted on the motor base 6, and a drive gear 9 is fitted on a rotating shaft 8 of the DC gear motor 7.

On the other hand, a ring gear 10 as a driven gear is integrally formed on the outer periphery of an end face plate 13 to be described later of the aforementioned cylindrical barrel 4,
Between the ring gear 10 and the drive gear 9 described above,
Two idle gears 11,1 supported on one frame 1
2, the cylindrical barrel 4 is rotated in the direction of arrow b (clockwise) in FIG. 4 in the plating solution L via the above-mentioned gears 9, 11, 12, and 10 when the DC gear motor 7 is driven. It is configured as follows.

The above-mentioned cylindrical barrel 4 has a cylindrical barrel wall 15 stretched between end plates 13 and 14 at both left and right ends as shown in FIGS.

The cylindrical barrel wall 15 includes crosspieces 16 arranged along a hexagonal ridge line, and a perforated plate 17 of a predetermined mesh through which the plating solution L can flow in and out. A detachable lid for attaching and detaching parts is detachably attached. However, since the detachable structure of the lid is well known, its illustration is omitted.

The above-mentioned cylindrical barrel 4 is provided with ball bearings 18,18.
While being mounted between the pair of frames 1 and 2 described above,
A fixing rod 19 made of brass whose only necessary portion is coated with a coating material such as heat-resistant vinyl chloride is inserted through the center of the cylindrical barrel 4 in the axial direction. , 20 are fixed to the frames 1 and 2 described above.

Further, a cathode 21 is mounted on the back surface of the other frame 2, and the lower end of the cathode 21 is electrically connected to the above-mentioned fixed rod 19, and the cathode 21 is covered with an insulating cover 22.

Further, a fixing rod 19 projecting outward from one of the frames 1 is covered with an insulating cap 23 made of a heat-resistant synthetic resin.

By the way, a plurality of stirring rods 24 to 27 for stirring the parts as the articles to be plated are attached to the fixed rod 19 via the respective cylinders 28 and the lock bolts 29, and these stirring rods 24 to 27 are respectively mounted. Are extended downward from the fixing rod 19 and fixed.

Each of the stirring rods 24 to 27 has a part stirring function during electroless plating, and has a function of energizing parts together with the part stirring function during electroplating.

That is, as shown in FIGS. 3 to 5, the plurality of stirring rods 24 to 27 extend from the fixing rod 19 into the plating solution L and have different lengths. Thus, a difference is formed between the lower ends of the stirring rods 24 to 27 and the inner surface of the bottom of the cylindrical barrel wall 15, respectively.

Further, brass stirring balls 30 are integrally formed at the lower ends of the above-mentioned stirring rods 24 to 27, respectively, and the stirring rods 24 to 27 for electroplating include the upper cylindrical body 28. Using the outer peripheral surface except for the stirring ball 30 with resin coating,
As the stirring rods 24 to 27 corresponding to the electroless plating, all the outer peripheral surfaces including the upper and lower cylindrical bodies 28 and the stirring balls 30 are resin-coated.

In the drawings, the resin coating layer is omitted for convenience of illustration.

And, at the time of the above-mentioned electroplating, the stirring balls 30.
To apply the parts to minus.

Here, the tips of the above-mentioned stirring rods 24 to 27 are arranged on a virtual parabola as shown in FIGS.

Further, as shown in FIG. 5, a perpendicular line a passing through the center of the above-mentioned fixed rod 19 and an axis passing through the center of each of the above-mentioned stirring rods 24 to 27 inclined toward the rotation direction side of the cylindrical barrel 4 are shown. The opening angles, that is, the inclination angles θ1 to θ4 are arbitrarily set for each of the stirring rods 24 to 27 described above.

In this embodiment, the above inclination angles are θ1 ≒ 5 degrees and θ2 ≒ 10
Degrees, θ3 ≒ 15 degrees, and θ4 ≒ 20 degrees, respectively, and the above-described inclination angles θ1 to
.theta.4 is arbitrarily variably adjusted.

Further, as shown in FIG. 6, the cross-sectional shape of each of the stirring rods 24 to 27 described above is such that the front side in the rotation direction of the cylindrical barrel 4 is narrow,
A shape having a part separation angle α in which the rear side in the rotation direction becomes wider, for example, a triangular shape, is configured to separate parts such as buttons that are relatively easily in surface contact.

The illustrated embodiment is configured as described above, and the operation will be described below.

For example, in order to apply electroplating or electroless plating to parts such as the aforementioned buttons, a large number of parts are charged into the cylindrical barrel 4 at a rate of about 50 to 55%.

The cylindrical barrel 4 into which the above-described parts are put is shown in FIGS.
As shown in the drawing, when the cylindrical barrel 4 is immersed in a predetermined amount in the plating solution L and the cylindrical barrel 4 is rotated in the direction of arrow b by driving the DC gear motor 7, the surface of the part can be plated.

During electroplating, the cathode 21, the fixed rod 19,
It goes without saying that the parts are negatively applied via the cylindrical body 28, the stirring rods 24 to 27 and the stirring ball 30.

At the time of the above-described plating reaction, the parts in the cylindrical barrel 4 are actively stirred by the non-rotating stirring rods 24 to 27. Good stirring is achieved by a synergistic effect with active stirring.

Further, the arrangement of the tips of the stirring rods 24 to 27 described above and the inclination angle θ1
By setting to θ4, the parts are well stirred along the parabolic stirring trajectory.

As described above, since the parts can be sufficiently stirred with the above-described stirring rods 24 to 27, there is an effect that the plating thickness is uniform and good plating without adhesion failure can be performed. By setting the inclination angles θ1 to θ4 of the stirring rods 24 to 27 at an arbitrary angle in advance, in accordance with the input amount of the parts to be input to the cylindrical barrel 4, the part mass, the specific gravity and the shape of the parts, Can be agitated along a good stirring trajectory, and the parts having a flat suction surface can be satisfactorily separated while being in surface contact with each other.

Further, by operating the lock bolt 29 described above, the stirring rods 24 to
27, the inclination angles θ1 to θ4 are variably adjusted at random, so that the above-described stirrer rods 24 are set in accordance with the type of parts to be put into the cylindrical barrel 4 and the plating conditions.
By varying the inclination angles θ1 to θ4 of up to 27 arbitrarily, it is possible to obtain a good stirring action while reducing the load on the DC gear motor 7 and the rotational resistance of the barrel 4 for all parts. .

That is, the above-mentioned inclination angle θ1 to obtain good stirring
θ4 is determined according to various conditions such as a part input amount, a part shape, a part specific gravity, a plating solution liquid specific gravity, a plating solution flow velocity and a flow velocity distribution of a plating bath in which the cylindrical barrel 4 is partially immersed, and a rotation speed of the cylindrical barrel 4. Therefore, by appropriately selecting the above-described inclination angles θ1 to θ4 based on an empirical rule, it is possible to obtain a good stirring action corresponding to the part.

For example, at the time of plating a part that is likely to come into surface contact, the above-described inclination angle may be generally increased in order to reduce rotational resistance.

The above-described operation of the lock bolt 29 can be performed by detaching a lid for taking in and out of parts, and a hexagon socket head bolt may be used instead of the illustrated hexagon bolt.

Further, since the cross-sectional shapes of the above-mentioned stirring rods 24 to 27 are triangular as shown in FIG. 6, parts such as buttons which are relatively easy to make surface contact are separated well by these stirring rods 24 to 27. Therefore, there is an effect that the part separation performance can be significantly improved.

FIG. 7 shows another embodiment of the stirring bar mounting structure. In the embodiment of FIG. 5, the inclination angles θ1 to θ4 of the stirring bars 24 to 27 are arbitrarily variably adjusted. In the embodiment, the inclination angles θ1 to θ4 of the stirring rods 24 to 27 are fixedly set in advance in different states.

Here, the above-mentioned respective inclination angles are θ1 ≒ 5 degrees, θ2 ≒ 10 degrees,
Although the angle θ3 ≒ 15 degrees and the angle θ4 ≒ 20 degrees are fixedly set, the inclination angles θ1 to θ4 may be fixedly set to other angles within a range of about 5 to 20 degrees. is there.

Even with this configuration, except for the variation of the inclination angles θ1 to θ4, substantially the same operation and effect as in the previous embodiment can be obtained. Therefore, in FIG. 7, the same parts as those in FIG. The numbers and the same reference numerals are given, and the detailed description is omitted.

In the correspondence between the configuration of the present invention and the above-described embodiment, the upright plate of the present invention corresponds to the frames 1 and 2 of the embodiment, and similarly, the cross-sectional shape of the stirring rod corresponds to a triangular shape. However, the present invention is not limited only to the configuration of the above embodiment.

[Brief description of the drawings]

1 shows an embodiment of the present invention. FIG. 1 is a front view showing a partially immersed horizontal barrel plating apparatus, FIG. 2 is a side view of the plating apparatus, and FIG. 3 is a line AA in FIG. FIG. 4 is a cross-sectional view taken along line BB of FIG. 3, FIG. 5 is a perspective view showing a mounting structure of the stirring rod, FIG. 6 is a cross-sectional view showing a cross-sectional shape of the stirring rod, FIG. 7 is a perspective view showing another embodiment of the stirring rod mounting structure. 1,2… Frame 4… Cylindrical barrel 19 …… Fixed rods 24-27 …… Stirring rods θ1-θ4… Tilt angle α… Parts separation angle

Claims (3)

(57) [Claims] 1. A barrel plating apparatus having a cylindrical barrel rotatably supported between a pair of spaced standing plates, wherein a non-rotatable fixed rod is mounted on a shaft core in the cylindrical barrel. Along with the fixed rod, a plurality of stirring rods are extended downward and fixed, and the inclination angle at which the stirring rod is tilted in the rotation direction of the cylindrical barrel with respect to a perpendicular passing through the center of the fixed rod, Barrel plating equipment arbitrarily fixed for each stirring rod. 2. The barrel plating apparatus according to claim 1, wherein the inclination angle of each of the stirring bars is variably adjusted. 3. The barrel according to claim 1, wherein the cross-sectional shape of each of the stirring rods is set to a shape having a part separation angle such that the front side in the rotation direction of the cylindrical barrel is narrow and the rear side in the rotation direction is wide. Plating equipment.