JPS592124Y2 - Barrel for plating treatment - Google Patents

Description

[Detailed description of the invention] The invention is constructed by connecting a number of annular unit materials with gaps between them, with a peripheral wall arranged so as to be rotated in a predetermined direction in a plating solution. The present invention relates to a plating barrel, and its purpose is to provide a plating barrel that can improve the so-called liquid draining effect when the plating barrel is pulled up from a plating solution.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

1 and 2, 1 is a plating solution tank, 2 is a predetermined plating solution stored in the plating solution tank 1, and 3, 3 are anode plates arranged on both sides of the inner surface of the plating solution tank 1. It is.

Reference numeral 4 denotes a barrel, which is composed of a peripheral wall 5 having a hexagonal cylindrical shape as a whole and end plates 6, 6 with both open ends closed, and the center portions of the end plates 6, 6 can be raised and lowered. It is rotatably suspended by an arm 7.7 and placed in the plating solution 2.

The barrel 4 is rotatably driven in a predetermined direction by a drive device (not shown).

Now, to describe the peripheral wall 5 in detail, 8 is an annular unit material made by integral molding of plastic, which has a hexagonal annular shape as a whole, but has an open shape on one side. It forms a zigzag shape in the circumferential direction.

In this annular unit material 8, a boss portion 10 having an insertion hole 9 is formed at each top portion and an intermediate portion between the top portions.

The portions of this annular unit material 8 excluding the boss portion 10 are formed so that the outer side, which is the outside of the peripheral wall 5, is narrower than the inner side, as shown in FIGS. 4 and 5. Further, this annular unit material 8 is provided with a large number of fins 11 extending in a direction perpendicular to the direction in which the annular unit material 8 extends.

Reference numeral 12 shown in FIGS. 1 and 2 is a long connecting rod with threaded portions formed at both ends, and as shown in FIG. The screws are inserted into the insertion holes 9 of a large number of annular unit materials 8 in a state in which they are held together, and both screw portions protrude from the end plates 6, 6 and are screwed together as shown in FIG. A peripheral wall 5 is formed between 6 and 6.

In this case, a gap 14 for plating solution to flow between the annular unit materials 8 is formed in the peripheral wall 5 by the spacer 13, as shown in FIGS. 3 and 4.

This gap 14 is widened toward the outside of the circumferential wall 5 because the outer side of the annular unit material 8 is narrower than the inner side. Therefore, the outer side of the circumferential wall 5 in the gap 14 is wide. The inner side portion of the peripheral wall 5 is narrow.

The narrow portion 14a of the gap 14 is set to such a width that the object to be plated housed inside the peripheral wall 5 will not come out.

As shown in FIG. 1, one open side of the peripheral wall 5 serves as an entrance/exit 15 for the object to be plated, and a lid 16 for opening and closing the entrance/exit 15 for the object to be plated is removably provided.

On the other hand, 17 is an electrode rod serving as a cathode introduced into the barrel 4 through a lead wire insertion hole 18 formed in the left end plate 6.

When the object to be plated (not shown) is accommodated in the barrel 4 having the above structure and subjected to plating treatment, the anode plates 3 and the electrode rod 1 are
A voltage is applied between 7 and the barrel 4 is rotated by a driving device.

Then, the object to be plated inside is stirred by the rotation of the barrel 4, and the plating liquid 2 and electric current are passed through the gap 14. Furthermore, at this time, the plating liquid 2 is caused to flow inside the barrel 4 by the fins 11 rotating together with the barrel 4. I feel like I'm being dragged into it.

In this case, a large number of objects to be plated come into contact with the electrode rod 17 evenly as the barrel 4 rotates, thereby performing the plating process on the objects to be plated.

After the plating process is completed, the arm 7.7 is pulled up to take out the barrel 4 from the plating solution 2, and predetermined post-processing is performed.

By the way, some conventional barrels of this type use an annular unit material with a substantially rectangular cross section;
There was a problem that needed to be improved in that when the barrel was pulled out of the plating solution, the ability to drain the plating solution was not very good.

When the present inventor investigated the cause of this, the following was found.

In other words, the gap for liquid passage formed between the annular unit materials is
It is necessary to set the width to be very small in order to prevent the object to be plated from falling off.

However, in the conventional barrel, the annular unit material has a substantially rectangular cross-sectional shape, so that the gap becomes long from the inside to the outside of the peripheral wall while maintaining a very small width.

As a result, the plating solution comes to adhere to the entire area of the gap due to surface tension, which is considered to be the cause of deteriorating the liquid removal performance.

In this regard, according to this embodiment, the annular unit material 8 is formed so that its outer part is narrower than its inner part, and the gap 14 is
Since the width is made wider by leaving a narrow part 14a that can prevent the object to be plated from falling off, the plating solution 2 is applied only to the narrow part 14a of the gap 14 while preventing the object to be plated from falling off. As a result, the drainage performance of the plating solution 2 can be greatly improved, and since the outer part of the gap 14 is expanded, compared to the conventional structure where the gap is very small and long from the inside to the outside of the peripheral wall. The flow resistance of the plating solution 2 in the gap 14 can be reduced, so that the plating solution 2 can be actively circulated inside and outside the barrel 4 through the gap 14, and the plating processing efficiency can be improved.

Furthermore, in this embodiment, since the annular unit material 8 is provided with fins 11 extending in a direction substantially perpendicular to the direction in which it extends, when the barrel 4 is rotated, the fins 11 cause the inside of the plating solution tank 1 to be The plating solution 2 can be forced into the barrel 4, and therefore the plating solution 2 that comes into contact with the object to be plated can be constantly replaced within the barrel 4. Therefore, the plating efficiency can be greatly increased.

Here, although it is possible to obtain the same effect as described above by reducing the thickness of the annular unit material 8, this poses a problem in that the strength of the annular unit material 8 decreases.

However, according to this embodiment, since the outer part is made narrower without reducing the thickness of the annular unit material 8, it is possible to obtain the above-mentioned effects while suppressing a decrease in strength. Since the fins 11 are provided on the fins 8, a reinforcing effect can be obtained by the fins 11, and there is no problem in overall strength.

Further, according to this embodiment, since the outer part of the annular unit material 8 is made narrower than the inner part, when the inner part of the annular unit material 8 is made narrower than the outer part, the object to be plated does not fit into the gap 14. Although there is a risk of clogging, that risk can be eliminated.

Incidentally, the cross-sectional shape of the annular unit material is not limited to the shape of the annular unit material 8 of the first embodiment, but may also be a shape such as the annular unit material 19 shown in FIG. 6 as a second embodiment of the present invention, or It may be shaped like the annular unit material 20 shown in FIG. 7 as a third embodiment of the present invention, and in any of these cases, the same effects as in the first embodiment can be obtained.

As explained above, the present invention is a plating process in which a peripheral wall is arranged to be rotated in a predetermined direction in a plating solution and is constructed by connecting a number of annular unit materials with gaps between them. By forming the annular unit material so that its outer part is narrower than its inner part, it is possible to prevent the object to be plated from falling off, improve liquid drainage, and improve the liquid drainage performance. It is possible to improve the circulation of the plating solution through the annular unit material, and eliminate the possibility that the object to be plated gets stuck in the gap.Furthermore, by providing the annular unit material with fins extending in a direction substantially perpendicular to the direction in which the annular unit material extends. , the plating solution can be forcibly drawn into the interior, and in combination with the above-mentioned improvement in the distribution of the plating solution, the distribution of the plating solution can be dramatically increased, and the plating processing efficiency can therefore be greatly increased. Furthermore, there are no problems with respect to strength, and excellent effects are achieved.

[Brief explanation of drawings]

1 to 5 show a first embodiment of the present invention, FIG. 1 is a vertical side view, FIG. 2 is an enlarged front view partially cut away,
Fig. 3 is an enlarged view of part III in Fig. 2, Fig. 4 is an enlarged sectional view taken along line IV-IV in Fig. 1, Fig. 5 is a partial perspective view of the annular unit material, Fig. 6 and FIG. 7 is a view corresponding to FIG. 4 showing a third embodiment and a fourth embodiment of the present invention, respectively. In the figure, 1 is a plating liquid tank, 2 is a plating liquid, 4 is a barrel, 5 is a peripheral wall, 8 is an annular unit material, 11 is a fin, 14 is a gap, 1
9.20 is an annular unit material.

Claims (1)

[Scope of utility model registration request] It is arranged so as to be rotated in a predetermined direction in a plating solution, and has a circumferential wall that connects a number of annular unit materials with gaps between them, and the annular unit materials are connected to the outer side of the annular unit materials. 1. A barrel for plating processing, characterized in that the annular unit material is provided with fins extending in a direction substantially perpendicular to the direction in which the annular unit material extends, such that the inner portion is narrower than the inner portion.