JPH02133600A - Barrel plating equipment - Google Patents

Abstract

PURPOSE:To positively agitate the parts and to uniformize the thickness of a plated film by lengthening and providing a plurality of unturned rodlike agitating means from the axial center part in a cylindrical barrel. CONSTITUTION:A barrel electrode 20 coated with a coating material 19 is inserted into the center part of the axial direction of a cylindrical barrel 4 and both ends thereof are unturnably fixed to the vertically provided plates 1, 2. An unturned agitator 25 for agitating the parts is fitted to the barrel electrode 20. Parts agitating action is performed by the agitator 25 at the time of electroless plating and electrifying action is performed thereby in combination with the agitating action at the time of electroplating. The electricallyconductive rods 26-29 different in length are detachably fitted to the agitator 25 in plating liquid from the barrel electrode 20. The agitation spheres 31 are integrally provided to the lower end parts of the conductive rods 26-29 and the parts are negatively impressed by the agitation spheres 31 at the time of electroplating.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention provides a method for applying a predetermined plating [ The present invention relates to a barrel fitting device that forms a shape.

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

That is, a pair of standing plates are provided facing each other with a predetermined interval apart, and a hexagonal cylindrical barrel rotatably driven by an AC motor is mounted between the pair of standing plates. This is a horizontal barrel plating apparatus of a partial immersion type in which a cylindrical barrel wall is stretched between blind end plates at both left and right ends, and the cylindrical barrel wall is entirely formed of a perforated plate.

When plating the surface of the above-mentioned parts using the above-mentioned barrel plating equipment, for example, the conventional barrel plating equipment uses only passive agitation due to the rotation of the cylindrical barrel, so the agitation of the parts is relatively insufficient. 5. There were problems in that variations in plating thickness and poor plating adhesion were likely to occur.

(C) Purpose of the Invention This invention has a unique configuration that actively agitates the parts, which makes it possible to obtain sufficient agitation of the parts, resulting in a uniform plating film thickness and good adhesion free. To provide a barrel plating device capable of plating and particularly useful for plating relatively large parts.

(D) Structure of the Invention The present invention is a barrel plating device in which a cylindrical barrel is rotatably supported between a pair of vertical plates arranged at intervals, and in which a plurality of cylindrical barrels are rotatably supported between a pair of vertical plates spaced apart from each other. It is characterized by being a barrel plating device with an extended non-rotating rod-shaped stirring means.

(E) Effect of the Invention According to the present invention, when the above-mentioned cylindrical barrel is rotated, the parts inside the barrel are actively stirred by the non-rotating rod-shaped stirring means.

Therefore, the parts are well stirred by the synergistic effect of the passive stirring by the rotation of the cylindrical barrel and the active stirring by the above-mentioned stirring means.

(F) Effects of the Invention As a result, the parts can be sufficiently agitated, the plating film thickness is uniform, and good plating can be performed without adhesion defects.

In addition, the above-mentioned rod-shaped stirring means is effective when plating relatively large parts such as the button mentioned above, because it has a good stirring effect without creating a large resistance to the flow of parts. It is.

In addition, since the above-mentioned stirring means extends from the shaft core of the cylindrical barrel, the stirring means can be easily made into a non-rotating structure by effectively utilizing the bearing portion of the cylindrical barrel. Therefore, there is an effect that the configuration can be simplified.

(g) Examples of the invention An embodiment of the present invention will be described in detail below based on the drawings.

The drawing shows a partially immersed horizontal barrel plating device, with the first
In Figures 1 and 2, a pair of standing plates 1 and 2 are provided with a predetermined spacing between them, and a plurality of spaces between the upper centers and between the lower corners of each of these standing plates 1 and 2 are provided. stay 3
...is connected.

In addition, a hexagonal cylindrical barrel 4 is rotatably supported at the lower part between the above-mentioned pair of upright plates 1.2.
A motor base 6 serving as a machine base is horizontally stretched between two mounting members 5.5 above the above-mentioned standing plates 1.2.

A DC geared motor 7 equipped with a speed governor (not shown) is mounted on the motor base 6, and a driving gear 9 is fitted onto a rotating shaft 8 of the DC geared motor 7.

On the other hand, between the ring gear 1o integrally formed on the outer periphery of the end plate 13 (described later) of the cylindrical barrel 4 and the driving gear 9, two idle gears 11, which are pivotally supported by one of the upright plates 1, 12 are interposed, and when the DC geared motor 7 is driven, each gear 9, 11 . .

12. The above-mentioned cylindrical barrel 4 is configured to be rotated in the direction of the arrow in FIG. 4 (clockwise) in the plating liquid via the screw 12.10.

As shown in FIGS. 2 and 3, 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.

This cylindrical barrel wall 15 includes a cross piece 16 disposed along the hexagonal ridgeline, ie, a so-called horizontal crosspiece, and a perforated plate 17 with a predetermined mesh through which the plating liquid can flow in and out. A lid for taking parts in and out is removably attached to one side of the wall 15, but since the structure for attaching and removing this lid is well known, its illustration is omitted.

Further, the above-mentioned cylindrical barrel 4 is axially mounted between the above-mentioned pair of vertical plates 1.2 via a bearing 1818, and the axial center of this cylindrical barrel 4 is covered with a heat-resistant vinyl chloride pipe or the like. A barrel electrode 2o made of brass covered with a material 19 is inserted, and both ends of the barrel electrode 20 are fixed non-rotatably to the above-mentioned upright plate 1.2 with nuts h21 and 21.

Further, a negative electrode plate 22, so-called cathode, is attached to the back surface of the other standing plate 2, and the lower end of this negative electrode plate 22 is electrically connected to the barrel electrode 20 described above.
2 is covered with an insulating cover 23.

Furthermore, the barrel electrode 20 protruding outward from one of the upright plates 2 is covered with an insulating cap 24 made of heat-resistant synthetic resin.

Incidentally, a non-rotating agitator 25 is attached to the barrel electrode 20 described above to agitate the parts to be polished.

This agitator 25 performs a stirring action during electroless plating, and performs an energizing action in addition to the stirring action during electroplating.

In other words, as shown in FIGS. 3 to 5, the above-mentioned agitator 25 is connected to the plating liquid (1),
Brass conductive rods 26, 27, 28, and 29 of different lengths are removably attached by screwing means as shown in FIG.
8 is covered with a covering material 30 such as a heat-resistant vinyl chloride pipe.

Brass stirring methods 31 are integrally provided at the lower ends of the conductive woods 26 to 29, respectively, and during electroplating, negative voltage is applied to the parts by these stirring methods 31.

Although FIGS. 3 and 4 show the agitator 25 with the tips of the conductive rods 26 to 28 exposed for electroplating, when performing electroless plating, the agitator 25 shown in FIG. Using an agitator in which the rods 26 to 29 are completely coated with the coating material 30, the agitator 25 compatible with electroplating and the agitator 25 compatible with electroless plating can be replaced as shown in FIG. This is done by attaching and detaching the soil section.

Moreover, as shown in FIG. 3, each of the above-mentioned conductive rods 26 to
Place the tip of 29 on the virtual parabola -H]7.

Furthermore, as shown in FIG. 4, the opening angle between the perpendicular line a passing through the center of the barrel electrode 20 described above and the axis passing through the centers of the conductive woods 26 to 29 tilted toward the rotational direction of the cylindrical barrel 4. is set at a predetermined angle θ, for example, about 5 degrees to 20 degrees.

The illustrated embodiment is constructed as described above, and its operation will be explained below.

For example, in order to apply electroplating or electroless plating to parts such as the aforementioned buttons, a large number of parts are placed in a cylindrical barrel 4.
Immerse yourself (approximately 50-55% immersion).

Insert the above parts (see Figure 1 and Figure 4)
As shown in the figure, by immersing a predetermined amount in a plating liquid and rotating the cylindrical barrel 4 by driving the DC geared motor 7, the surface of the part can be plated.

In addition, when electroplating, each flight 122, 20.26-29
Of course, a negative voltage can be applied to the parts via the .

” During the double mesh reaction, the para in the cylindrical barrel 4 is actively stirred by the above-mentioned plurality of conductive rods 26 to 29 in the non-rotating agitator 25, so that this part becomes cylindrical. Good stirring is achieved by the synergistic effect of the passive stirring caused by the rotation of the barrel 4 and the above-mentioned active stirring.

Further, due to the arrangement of the tips of the conductive rods 26 to 29 and the setting of the angle θ, the parts are well stirred along the parabolic stirring locus.

In this way, the above-mentioned agitator 25 can sufficiently agitate the parts, which has the effect of providing a uniform plating film thickness and good plating without adhesion defects, especially on buttons etc. When plating relatively large parts, the conductive rods 26 to 29 can stir the parts appropriately without providing a large resistance to the flow of the parts.

In addition, since the above-mentioned agitator 25 extends from the axial center of the cylindrical barrel 4, the stirring effect is uniform every time the barrel rotates.
Not only can a stable stirring action be obtained, but also the agitator 25 can be easily made into a non-rotating structure by effectively utilizing the bearing part of the cylindrical barrel 4, so that the structure can be simplified. There is an effect that can be done.

In the correspondence between the structure of the present invention and the above-described embodiments, the stirring means of the present invention corresponds to the agitator 25 and the conductive rods 26 to 29 of the embodiments, and the object to be plated corresponds to the parts. However, the present invention is not limited to the configuration of the above-described embodiment.

For example, the above-mentioned cylindrical barrel 4 may have a hexagonal or polygonal cylindrical shape, the mesh of the perforated plate 17 may have a mesh shape of round holes other than square mesh, or the above-mentioned Of course, a predetermined mesh porous portion may be formed at the end faces 13 and 14 to allow the inflow and outflow of the plating solution.

Furthermore, when the above-mentioned barrel plating apparatus is used only for electroless plating, there is no need to apply a DC voltage, so the above-mentioned barrel electrode 20 and conductive rods 26 to 29 can be replaced with rods made of hard synthetic resin, for example. , the covering structure may be omitted.

Incidentally, if the DC geared motor 7 is used as the barrel drive source as shown in the embodiment, sufficient rotational torque can be obtained despite the small size.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, FIG. 1 is a front view of a partially immersed horizontal barrel plating device, FIG. 2 is a side view of the same plating device, and FIG. The cross-sectional view in FIG. 4 is a view taken along line BB in FIG. 1.2... Standing plate 4... Cylindrical barrel 25.
・Agitator 26゜27゜28゜9...Conducting port Figure 1! 1st place ＼゛rel Figure 4. ”

Claims (1)

[Claims] (1) A barrel plating device in which a cylindrical barrel is rotatably supported between a pair of standing plates arranged at intervals, and a plurality of non-rotatable rod-shaped Barrel plating equipment with extended stirring means.