JPS5932595Y2 - Barrel plating equipment for composite plating processing - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a barrel plating apparatus for complex plating processing, which is used when plating a large number of small workpieces (components, etc.).

As shown in FIG. 1, which is a schematic vertical cross-sectional view, and FIG. 2, which is a schematic cross-sectional view of FIG. The plating process is performed while the barrel 1 is immersed in the plating solution 2 and rotated by a drive mechanism (not shown) about the center 0-0 (line) of the barrel 1 as an axis.

However, according to the above device, each workpiece W (only a part is shown)
As the barrel 1 rotates, it only pivots up and down in a vertical plane perpendicular to the center line O-0, which results in a disadvantage that the stirring effect on the workpiece W is low and the plating process takes a long time.

In particular, for processes that require high stirring efficiency, such as composite plating (e.g., eutectoid plating of metals such as nickel and non-metals such as organic substances such as fluororesin particles and inorganic substances such as keratin carbide), the above-mentioned conventional There is a problem that the device is difficult to use.

In order to solve the above-mentioned problem, the present invention has the center of the barrel inclined with respect to the center of rotation of the barrel by the rotary drive mechanism, and is constructed as follows.

In the present invention, a barrel for accommodating a workpiece is formed by a cylindrical peripheral wall that allows the flow of plating solution and a pair of end walls that close openings at both ends of the peripheral wall, and the barrel is immersed in a plating bath for composite plating. A rotary drive shaft and a rotary support shaft are attached to each end wall at the center of each other's mouths, and each shaft is eccentric to the center of the end wall so that the center of the barrel is inclined with respect to the center of both shafts. The shaft is characterized in that the amount of eccentricity with respect to the center of the end wall is greater than the amount of eccentricity with respect to the center of the end wall of the other shaft, and the outer surface of the end wall is inclined with respect to the center of rotation of the shaft.

Next, embodiments will be described with reference to the drawings.

In FIG. 3, the barrel 10 has a cylindrical peripheral wall 11 and the peripheral wall 1.
1 and end walls 12 and 13 that close the openings at both ends.

The peripheral wall 11 is mostly made of a synthetic fiber mesh 14 (or perforated plate), and has a hexagonal cross section, for example, like the product shown in FIG. has been reinforced.

Although not shown, an opening serving as a workpiece input port is formed on one of the six sides of the peripheral wall 11, and the input port is covered with a removable lid.

O-0 is the barrel center passing through the centers of both end walls 12 and 13, 2
0.21 is a cylindrical support shaft and a cylindrical rotation drive shaft attached to the end walls 12 and 13 via brackets 22 and 23.

Both shafts 20 and 21 are horizontal and mutually centered, and each end wall 1
2, 13, and both axes 20
．． For example, the barrel center O-O is 5 for the center AA of 21.
It is tilted at an angle within the range of 20° to 20°.

The center O--O is located at the point 01, intersecting with or closest to the center A-A, and in the illustrated embodiment, the point 01 is located closer to the end wall 12.

In other words, the support shaft 20 is closer to the center O-O than the rotary drive shaft 21.
Located near the.

Both shafts 20 and 21 are rotatably supported by vertical plate frames 25 and 26 in a row pair.

The shaft 2 is inserted between the frame 26 and the bracket 23.
A spur gear 27 is fixed to 1, and the spur gear 27 is connected to a pinion 30 via an idle gear 28 which is buttoned above and supported by a frame 26.

The pinion 30 is fixed to the main shaft of the variable speed motor 29.

A plating solution supply pipe 31 is arranged outside the 71/-mu 25.

The pipe 31 extends generally vertically and has a button, and a lower end portion 32 is bent toward the center of the support shaft 20 and is fixed in a liquid-tight manner within an annular member 33 fixed to the frame 25.

The internal passage 35 of the cylindrical support shaft 20 communicates with the internal passage of the pipe 31, and the end wall 12 is provided with a nozzle 36 that communicates with the passage 35.

The nozzle 36 is formed, for example, by a plurality of pores, and opens toward the inside of the barrel 10, for example, parallel to the center line A-A.

The upper end of the pipe 31 is connected to the illustrated plating tank 40 or another plating solution storage tank via a filter, pump, etc. not shown.

The above-mentioned device connects the lower ends of both frames 25 and 26 to the plating tank 4.
0 is immersed in the plating solution 41 while seated on the bottom of the container.

The level of the plating solution 41 is set at a position slightly above the barrel 10.

The apparatus described above is also used for composite plating.

Explain the action.

When the shaft 21 is rotated by the motor 29 via the pinion 30 and gears 28 and 27, the barrel 10 rotates about the center A-A.

In that case, since the barrel stop O-0 is inclined with respect to the rotation center AA, the barrel 10 not only rotates, but also
As shown in Figure 3, the state is downward to the left when viewed from the front (the state shown)
It oscillates between the downward and rightward states.

Also, since the above-mentioned swinging is performed centering on point 01 (or its vicinity) near the end wall 12, the barrel portion (for example, 42) far from the center A-A near the end wall 13 moves up and down significantly. Then it will revolve around the center A-A with a large radius.

Therefore, the workpiece W (only a part of which is shown) inside the barrel not only rotates up and down, but also moves significantly toward the end wall 12 side and the end wall 13 side each time the inclination direction of the barrel 10 changes, and the workpiece W as a whole is efficiently stirred.

During the above operation, the pipe 31 passes through the passage 35 to the nozzle 36.
A new plating solution having a predetermined concentration of dissolved metals (or metals and non-metals) is constantly supplied to the nozzle 36.
from the inside of the barrel 10.

Therefore, the workpiece W inside the barrel 10 is always in contact with new plating solution, and the old plating solution inside the barrel 10 is discharged out of the barrel through the mesh of the peripheral wall 11.

As explained above, according to the present invention, the center 0-0 (geometrical center) of the barrel 10 is inclined with respect to the rotation center A-A of the barrel by the rotational drive mechanism such as the motor 29, and the barrel 10 is simply rotated. Barrel 1 is not only tilted, but also alternately swung into opposite tilting positions (downward to the right and downward to the left).
Since the workpiece W is given a complicated movement, it is possible to move the workpiece W not only in the vertical direction but also in a direction parallel to the center O-O, thereby increasing the stirring effect.

Therefore, processing time is shortened, composite plating is facilitated, and even when the work W is in the form of a plate, it is possible to prevent the work W from forming a tight joint, thereby preventing uneven plating.

Further, in the present invention, in order to obtain a high stirring efficiency sufficient to perform composite plating processing, the following measures have been taken.

That is, the eccentricity of one shaft 21 with respect to the center of the end wall 13 is made larger than the eccentricity of the other shaft 20 with respect to the center of the end wall 12, and the centers A-A of the shafts 20 and 21 are placed inside the barrel 10 and within the end wall 12. Press the button to the nearest position 01 and center the barrel O-0
It is brought close to.

With this configuration, when the barrel is rotated, the barrel 10 can be moved up and down significantly by pressing the button on the end wall 13 side, so that the flow of the plating solution between the inside and outside of the barrel 10 can be promoted. It is possible to improve the contact efficiency of fresh plating solution with the coating, shorten the plating process time, and improve the finished state.

Moreover, since the shaft 20 on the end wall 12 side is also eccentric, the barrel 10 can be moved up and down even if it is turned toward the end wall 12 side.

Therefore, it is possible to prevent the plating solution from staying inside the barrel 10 on the end wall 12 side, and to shorten the processing time even if the button is located at this point.

Moreover, the outer surfaces of the end walls 12 and 13 (see FIG.
(the left surface of the end wall 13 and the right surface of the end wall 13) are inclined with respect to the rotation center A-A of the shaft.

With this configuration, as the barrel rotates, the end wall 1
The outer surface of the 2.degree. 13 not only rotates, but also swings between the downward-sloping state shown in the figure and the opposite downwardly-left state.

This rocking causes the outer surface of the end wall to push the plating solution in the left-right direction in FIG. 3, thereby stirring the plating solution.

Therefore, this stirring effect also promotes the flow of the plating solution between the inside and outside of the barrel 10, thereby shortening the plating process time and improving the finished state.

In the illustrated embodiment, the motor 29 is of a variable speed type, so that
The rotational speed of the barrel 10 can be adjusted so that the stirring speed is at an optimum value.

Since the new plating solution is directly supplied into the barrel 10 through the hose 31 and the nozzle 36, the new plating solution is constantly brought into contact with the workpiece W, thereby reducing processing time and improving the finished state.

When embodying this invention, the hose 31 and nozzle 36
can also be abolished.

[Brief explanation of drawings]

Fig. 1 is a schematic vertical cross-sectional view of the conventional example, and Fig. 2 is the n of Fig. 1.
3 is a partially cutaway front view of an embodiment of the present invention. 10... Barrel, 11... Peripheral wall, 12, 13...
End wall, 20... Support shaft, 21... Drive shaft, 40...
Plating bath, A-A...rotation center, O-O...barrel center, W...work.

Claims (1)

[Scope of utility model registration request] A barrel that accommodates the work is formed by a cylindrical peripheral wall that allows the plating solution to flow and a pair of end walls that close openings at both ends of the peripheral wall. The rotation drive shaft and the rotation support shaft are attached to the center of the mouth in the ear, and each shaft is eccentric to the center of the end wall so that the center of the barrel is inclined to the center of both shafts, and the end of one shaft is A barrel plating device for composite plating processing, characterized in that the amount of eccentricity with respect to the center of the wall is greater than the amount of eccentricity with respect to the center of the end wall of the other shaft, and the outer surface of the end wall is inclined with respect to the center of rotation of the shaft.