JPS598769Y2 - surface treatment equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus used for surface treatments such as plating, chromate treatment, zinc-chromate treatment, and etching treatment.

Conventionally, in order to carry out this type of surface treatment, objects to be treated are immersed in treatment tanks filled with various treatment solutions or cleaning water in a predetermined order.

For example, in the case of chromate treatment, the process is plating → water washing → nitric acid treatment → water washing → chromate treatment → water washing → dehydration → drying, and the objects to be treated are plating tank → water washing tank → chromate treatment tank → washing tank, dehydrator → drying It was transported and immersed in the machine.

According to this method, one processing tank or processing machine is required for one process, and a large space is required to accommodate these processing tanks or processing machines, and there is no need to cover the spaces between the processing tanks or processing machines. The material to be treated must be transported, and the transportation requires manpower or equipment, and there is a risk that the material to be treated may be damaged during transportation. Mixing or processing of processing liquids between processing tanks or processing machines is required. Mixing of the liquid and the washing water occurs.Especially in the case of chromate treatment, a certain amount of hexavalent chromium is mixed into the washing water, so this must be removed before it is drained. The first drawback is that the amount of hexavalent chromium removed is large.

Recently, the shortcomings of the conventional technology have been improved to improve space efficiency, minimize the transportation of the processed material, improve drainage, and improve mixing of processing solutions or mixing of processing solutions and cleaning water. In order to prevent this, a device has been proposed in which a processing tank is made porous and rotatable so that a predetermined processing liquid or cleaning liquid can be sequentially added, removed, and centrifugally dehydrated in one processing tank.

This kind of equipment requires only one processing tank and does not take up much space, and by immersing the processing object in the processing liquid and rotating the processing tank, the processing liquid can quickly spread to the fine details of the processing object. Efficiency is improved, and if centrifugal deliquid is performed after each treatment or washing, the amount of the processing liquid or washing water from the previous stage of treatment will be reduced, and the mixing of the processing liquids with each other or the processing liquid and washing water will be reduced. It has many advantages, such as being very small.

The present invention takes into account that the objects to be treated in the above-mentioned surface treatment apparatus are relatively heavy, and the centrifugal force causes the objects to accumulate on the peripheral wall of the processing tank, causing the processing liquid to flow into the objects. In a structure consisting of a container and a porous treatment tank rotatably installed within the container, one or more than one porous treatment tank is installed from the bottom of the porous treatment tank. The present invention, which is based on an upright inner peripheral wall, will be explained using an embodiment shown in the figure. A is a surface treatment device, B is a treatment liquid tank, and C is a washing tank. Yes, and D is a hot air dryer.

In the surface treatment apparatus A, 1 is a container supported from a base 11 via legs 12 and springs 13, a lid 30 is pivotally attached to the upper part of the container 1 with a hinge 31, and the container 1 is
A liquid distribution tank 9 is provided on the outer periphery of the container 1 and communicates with the inside of the container 1 through a communication hole 10, and a drain pipe 28 with a solenoid valve 28A interposed therein and a liquid drain pipe 29 with a solenoid valve 29A interposed therebetween are connected to the bottom.

A rotating bearing 2 is suspended from the center of the container 1, and a rotating shaft 3 supported by a bearing 4 and sealed with a mechanical seal 5 passes through the rotating bearing 2.
A processing tank 6 having a large number of pores 23 is fixed by a fixing nut 8 at the upper end of the tank.

An inner peripheral wall 7 is erected from the bottom of the processing tank 6 . Rotating axis 3
A pulley IJ-16.17 is fitted to the lower end of the brake motor 14.15, and the pulley 16.17 is connected to pulleys 14A and 15A of a brake motor 14.15 via belts 16A and 17A.

The drain pipe 29 opens onto the processing liquid tank B.

One end of a pipe 25 in which a pump P1 is interposed communicates with the processing liquid tank B, and the other end of the pipe 25 communicates with the liquid distribution tank 9.

One level gauge 24 is arranged in the liquid distribution tank 9, a washing tank ◎ is arranged in the upper part, and a float 2 is placed in the washing tank ◎.
A water supply pipe 21 with a valve 21 A interposed therebetween communicates with the liquid distribution tank 9 , and a water supply pipe 20 with a solenoid valve 20 A interposed therebetween extends from the bottom of the washing tank ◎ and communicates with the liquid distribution tank 9 .

The hot air dryer D is disposed above the surface treatment apparatus A, and consists of a cylindrical body 26 having a jet pipe 26A at the tip, a hot wire 26B inside, and a blower 27 at the rear.

To perform, for example, chromate treatment using the above-mentioned surface treatment system, the object 18 to be treated, such as a galvanized bolt, is loaded into the treatment tank 6 with the lid 30 of the container 1 opened.

After that, the cleaning process begins, and the lid 30 of the container 1 is closed, and the cleaning water filling the washing tank @ is transferred from the water supply pipe 20 to the liquid distribution tank 9 by opening the electromagnetic valve 20A, and further from the liquid distribution tank 9. It is supplied to container 1.

When the washing water in the washing tank ■ decreases, the float 22 lowers.
The valve 21A is opened and washing water is supplied from the pipe 21 to the washing tank ◎.

Further, the water level of the liquid distribution tank 9, that is, the water level of the container 1, is detected by the level gauge 24, and based on this detected value, the solenoid valve 20
A is controlled to adjust the water level of the liquid distribution tank 9, that is, the water level of the container 1, to a height sufficient to completely immerse the object to be treated.

Next, by driving the brake motor 14, the rotary shaft 3 is slowly rotated via the Puno 14A, the belt 16A, and the spring 16, and the processing tank 6 is naturally rotated slowly.

Along with the rotation of the processing tank 6, the cleaning water also generates a rotational flow and permeates into the details of the object to be processed 18, but the object to be processed 18 is pushed against the peripheral wall of the processing tank 6 by the centrifugal force caused by the rotation of the processing tank 8. However, as shown in FIG.
Does not accumulate on surrounding walls.

Therefore, the cleaning water efficiently spreads over the object 18 to be treated.

The solenoid valve 28A is set to open when the brake motor 14 is driven, and the cleaning waste water is discharged from the drain pipe 28.

When the cleaning water in the container 1 runs out, the cleaning water adhering to the object to be treated is centrifugally separated.

Incidentally, in this example, the cleaning time is 30 seconds to achieve sufficient effect.

Next, the nitric acid treatment step begins, but in this case, the brake motor 14 is stopped and the solenoid valve 28A is closed at the same time.If the pump P1 is set to operate at the same time, the nitric acid solution in the treatment liquid tank B is removed by the pump P1. is piping 25
The liquid distribution tank 9 is further filled into the container 1 via the liquid distribution tank 9, and the liquid level is determined by the level gauge 2 which is linked to the pump P1 in the same manner as the cleaning water.
4.

Next, the brake motor 14 is driven to slowly rotate the processing tank 6, and the solenoid valve 29A is set to open at the same time, so that the nitric acid solution is discharged from the drain pipe 29.

The nitric acid solution is thus collected in the processing solution tank B.

When the nitric acid solution in the container 1 is exhausted, the nitric acid solution adhering to the object to be processed 18 is centrifugally separated.

The brake motor 14 is stopped and the solenoid valve 29 is stopped.
Set A to close as well.

Even in the nitric acid treatment step, the inner circumferential wall 7 prevents all of the objects 18 from accumulating on the circumferential wall of the treatment tank 6, so that the treatment is carried out effectively.

Next, the cleaning process begins, but in this case, it is carried out in the same manner as the previous cleaning process.

Next, the chromate treatment step begins, but in this case, as in the nitric acid treatment step, the brake motor 14 is stopped and the solenoid valve 28A is closed at the same time, and if the pump P1 is set to operate at the same time, the treatment is performed by the pump P1. The chromate solution in liquid tank B is transferred to liquid distribution tank 9 via piping 25.
Further, the container 1 is filled with water, and the liquid level is adjusted by a level gauge 24 that is linked to the pump P1 in the same way as cleaning water.

Next, the brake motor 14 is driven to cause the processing tank 6 to repeat a cycle of forward rotation for 5 seconds, stop for 2 seconds, and reverse rotation for 5 seconds.

In the repetition of the above-mentioned forward and reverse rotations, the inner peripheral wall 7 prevents the entire object 18 from accumulating on the peripheral wall of the processing tank 6 due to centrifugal force. It becomes easier to spread.

The processing tank 6 is rotated forward and backward for about 30 seconds, and then the processing tank 6
The solenoid valve 29A is set to open at the same time as the solenoid valve 29A is slowly rotated, and the chromeil solution is discharged from the drain pipe 29.

The chromate solution is thus collected in the treatment solution tank B.

When the chromate solution in the container 1 is exhausted, the chromate solution adhering to the object to be treated is centrifugally separated.

The brake motor 14 is stopped and the solenoid valve 29 is stopped.
Set A to close as well.

Next, a cleaning process is performed in the same manner as the previous cleaning process, but at this time, the treatment tank 6 is rapidly rotated by the brake motor 15 to complete dehydration, but at the same time as the dehydration process begins, the lid 30 of the container 1 is opened. The hot air dryer D blows hot air onto the object to completely dry it.

Drying took 60 seconds. The brake motor 15 and the hot air dryer D are stopped, the solenoid valve 28A is closed, and the chrome treatment is completed, so the object 18 is transferred to the treatment tank 6.
The work is completed by taking it out.

The present invention is useful when applied to any surface treatment other than the above embodiments, such as electrolytic plating, electroless plating, zinc-chromium treatment, and others.

In addition to the embodiments described above, the treatment tank 6 may be rotated in forward and reverse directions not only in the chromate 1 treatment step but also in the cleaning step and the nitric acid treatment step.

Furthermore, one continuous rotation may be performed instead of forward and reverse rotation.

Furthermore, two or more inner circumferential walls may be provided upright in the processing tank, and the inner circumferential wall may not be cylindrical over the entire circumference but may be arcuate.

Furthermore, a baffle plate may be suspended from the bottom of the processing tank in order to agitate the washing water or processing liquid to improve processing efficiency.

Since the present invention has the above-mentioned structure, although the objects to be processed in the porous processing tank rotatably installed inside the container do not move toward the peripheral wall of the processing tank due to the centrifugal force caused by the rotation of the processing tank, about half of the objects are moved inside the processing tank. It is locked to the peripheral wall and effectively prevents all the objects to be processed from accumulating on the peripheral wall of the processing tank.

In this way, the treatment liquid or cleaning water can be easily distributed evenly and uniformly over the entire object to be treated, resulting in efficient treatment.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a front cross-sectional view, Fig. 2 is a perspective view of the surface treatment equipment main body, Fig. 3 is a perspective view of the porous treatment tank, and Fig. 4 is a central view. FIG. In the diagram: 1...Container, 3...Rotation axis, 6
... Porous treatment tank, 7 ... Inner peripheral wall, 18
・・・・・・Processing object.

Claims (1)

[Scope of utility model registration request] In a structure consisting of a container and a porous treatment tank rotatably installed in the container, one from the bottom of the porous treatment tank,
Alternatively, a surface treatment device characterized by having two or more inner peripheral walls erected.