JP2504804Y2 - Electrostatic oiling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an electrostatic oiling device for applying oil to a strip surface by electrostatic action. More specifically, it relates to a device that can switch between heavy oil coating and light oil coating.

[Prior Art] Comparison of strip surface using electrostatic action to prevent rusting of strip-shaped articles (hereinafter referred to as strips) such as steel and non-ferrous metals, improve printability, and prevent scratches. An electrostatic oiling device for forming a thin oil film is widely used.

In principle, this type of electrostatic oiling device can be roughly classified into an air atomizing type oiling device and an electrostatic atomizing type oiling device.

The former includes an air atomizing mechanism that atomizes oil by using air flow and a drive electrode. Further, there are a charged atomized oil supply system and a non-charged atomized supply system depending on whether or not the atomized oil is pre-charged.

This charged atomized oil supply system (for example, Japanese Patent Publication No. 54-17775) slips with an air atomization mechanism 10 (chamber 11, atomization chamber 12, oil sump 13, atomizer 14) as shown in FIG. It is composed of a long drive electrode 20 arranged along S and an ionizer 18 for charging atomized oil. A high voltage power supply 25 is connected to the drive electrode 20 and the electrode of the ionizer 18 is charged with a power supply.
It is configured to connect 19.

On the other hand, an uncharged atomized oil supply system (for example, Japanese Utility Model Sho 63-358
No. 01), as shown in FIG. 4 (the horizontal feed type is shown as a vertical feed type for the sake of comparison with other examples), the ionizer (18) is not provided and the air atomizing mechanism 10 is provided. The oil sump 15 and the pickup roller 16 have a simple structure.

Therefore, both types are excellent in atomization of atomized oil, and are suitable for carrying out so-called light coating oil having an oil coating amount of, for example, 0.5 to 1 g / m ² . In addition, since the uncharged atomized oil supply method has a slightly coarser particle size, the amount of applied oil can be increased.

However, since both methods are air atomization type and the distance to the drive-in electrode 20 is long, the coating efficiency (stopped at around 70%) is low, and the drive-in electrode 20 is large, so the device is large. There is a drawback.

On the other hand, an electrostatic atomization type oil coating device (for example,
63-46139), as shown in FIG. 5, has a spray head 23 having a slit 22 of several tens of μm and connected to a high-voltage power supply 25.
Is closely arranged so as to face the strip S to be fed, so that the coating efficiency is close to 100%, the apparatus is small, and the amount of oil is suitable for so-called heavy oil coating such as 1 to 5 g / m ^2. . However, since the atomization is carried out by using the electrostatic action, the atomized oil particles are coarse and cannot follow the load fluctuation, especially the light load, and thus the strip S
The thickness of the oil coating film tends to vary in the width direction.

In any of the types and systems, the strip S is continuously fed by a feeding mechanism (not shown).

Heretofore, in the case of a strip S that needs to have a very thick oil coating film such as a product for export, an electrostatic atomization type oil coating device suitable for heavy oil coating is conventionally installed to light oil coating. In this case, an air atomization type oil coating device is generally installed.

Further, when producing both lightly-oiled products and heavily-oiled products, both 1 and 2 were installed side by side, that is, two lines were provided.

[Problems to be solved by the invention] By the way, even in the electrostatic oiling device, light oiling products (or heavy oiling products) are mainly used due to the demand for product diversification, while heavy oiling products ( Or light oil products) are often produced.

However, there is a certain limit in performing heavy oil coating using the air atomization type oil coating device 1. This is because the coating efficiency is further reduced and the burden of waste oil treatment thereafter increases. Similarly, when light oil coating is performed using the electrostatic atomization type oil coating device 2, there is a certain limit due to variations in the oil coating film thickness.

Therefore, it is unavoidable to install two lines as described above, but if two lines are provided for medium to long-term (for example, 3 to 6 months) operation for, for example, 2 to 7 days, the installation space is too large. ， Inconvenience that the burden of equipment economy is increased occurs, and it is not possible to provide inexpensive oiled products.

An object of the present invention is to provide an electrostatic oiling device which can switch between light oiling and heavy oiling and can be operated at low equipment cost and in a small installation space.

[Means for Solving the Problems] In the present invention, the increase in the installation space is mainly due to the size of the drive electrode or the arrangement pitch of a plurality of spray heads and the redundant installation of the feeding mechanism, the high-voltage power source, etc. The increase in fuel consumption is due to the large proportion of the cost of the feeding mechanism, high-voltage power supply, etc. Furthermore, it is technically and economically necessary to switch between heavy oil coating and light oil coating in the medium and long term. As a result of testing and research on mechanical and electrical matters in constructing the main components in common by paying attention to trends, oiling operation is possible even when the drive electrode and the spray head are replaced. It was devised based on the technical fact that.

That is, according to the present invention, an air atomization type oil coating unit including an air atomization mechanism and a drive electrode is arranged on the upstream side in the strip feeding direction, and an electrostatic head having a spray head is provided on the downstream side. An atomizing type oil coating unit is provided, and a detaching mechanism is formed to detachably attach each of the drive electrode and the spray head to a common power supply mechanism. It is characterized in that it is configured to be exchanged through the apparatus and attached to the feeding mechanism to switch the air atomization type oil coating unit and the electrostatic atomization type oil coating unit for the oil coating operation.

[Action]

In the present invention, for example, in the case where a light oiling product is mainly used, a light oiling operation can be performed using an air atomizing mechanism by mounting a drive electrode on the power feeding mechanism. That is, the same operation as a general air atomization type oil coating device can be performed.

On the other hand, for example, when it is desired to produce a heavy-oiled product only for one week in six months, if the spraying head is replaced by a common power supply mechanism instead of the drive electrode through the attachment / detachment mechanism, the strip feeding mechanism or Heavy oiling operation can be performed using the high-voltage power supply as it is. That is, the same operation as a general electrostatic atomization type oil coating device can be performed.

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

 FIG. 1 is a system diagram, and FIG. 2 is a side view of a main part.

1 and 2, the left half centered on the strip S is equipped with the drive electrode 20 on the common power feeding mechanism 24,
The right half shows the case where the spray head 23 is attached.
Of course, for example, when the drive-in electrode 20 is mounted, a pair of drive-in electrodes 20 and 20 are provided on both sides of the strip S which is narrowed.

This electrostatic oiling device is equipped with a strip S as shown in FIG.
The air atomization type oil coating unit 1 is arranged on the upstream side in the feeding direction of the above, and the electrostatic atomization type oil coating unit 2 is arranged on the downstream side thereof, and the driving electrode 20 and the latter 2 of the former 1 are arranged. Spraying head
23 and 23 are configured to be attachable by exchanging the common power supply mechanism 24 through the attachment / detachment mechanism 50, and configured to be able to switch to another oiling operation in the long and medium term. In other words, if the light oiling operation is considered to be the mainstream, a heavy oiling operation by the electrostatic atomization type oiling device can be performed by simply providing the air atomization type oiling device with a plurality of spraying heads 23 and the attachment / detachment mechanism 50. It was made possible.

Further, in this embodiment, the selection switching means 30 is provided for the convenience of the specific switching operation, and the selection oil supply means 40 is provided to maintain the high quality oil coating film and the high coating efficiency.

Since the basic configurations of the former 1 and the latter 2 are the same as those of the conventional electrostatic oiling devices shown in FIGS. 3 to 5, the same or common parts are denoted by the same reference numerals and their description is omitted. Will be abbreviated.

In addition, the former 1 can be implemented as the above-mentioned uncharged atomized oil supply system or the charged atomized oil supply system. In this embodiment, an uncharged atomized oil supply system was adopted.

Now, the air atomization type oil coating unit 1 is shown in FIGS. 1 and 2 (this device is a strip horizontal feed type, but is shown as a vertical feed type for convenience of comparison with the conventional example). As shown in FIG. 2, the electrostatic atomization type oil coating unit 2 is formed by including the air atomization mechanism 10 (oil sump 15, pickup roller 16) and the drive electrode 20.
Is formed to include a spray head 23 having a plurality of (four) slits 22, and both 1 and 2 are configured to have a high-voltage power supply 25, a power feeding mechanism 24, a feeding mechanism (not shown) for the slip S, and the like in common. There is.

Here, the common power supply mechanism 24 is composed of an insulator 21 and a power supply 26 connected to a high voltage power supply 25, as shown in FIG. However, it is also possible to directly connect the high-voltage power supply 25 to the drive-in electrode 20 or the spraying head 23 which is mounted in exchange.

On the other hand, the attachment / detachment mechanism 50 is composed of an I-beam shaped support member 51 fixed to the power supply 26 and a grooved locking member 52 fixed to the drive electrode 20 and the spray head 23. The groove is attached to the support member 51 so as to be integrally connected, and can be detached by sliding the groove in the direction perpendicular to the paper surface in FIG. Therefore, the common power supply mechanism 24 (21,2
The drive electrode 20 and the spray head 23 can be replaced and attached to 6).

The support member 51 and the locking member 52 are made of a conductive material, but as described above, the high voltage power supply 25 and the drive electrode 20 are provided.
In the case where the spray head 23 and the replaced spray head 23 are constructed to be directly connected by a cable or the like, the spray head 23 may be formed of a non-conductive material.

Further, reference numerals 54-1 and 54-2 in FIG. 2 are connecting pieces having different lengths, and are provided for arranging the drive-in electrode 20 at an inclination with respect to the strip S. That is, the drive electrode
The 20 and the locking member 52 are fixed to each other via these connecting pieces 54-1 and 54-2.

By the way, in this embodiment, the selection switching means specially provided
30, due to the relationship with the selective oil supply means 40, oil is supplied to the air atomization mechanism 10 through the oil supply valve 35-1 and compressed air is supplied through the air supply valve 34. In addition, the drive electrode is connected to the drive electrode 20.
It is supposed that the high voltage power supply 25 is connected via 33-1. In addition, 28 is a high pressure air source.

On the other hand, the spray head 23 that has been replaced is equipped with an oil supply valve 35
-2, and is connected to the high-voltage power supply 25 via the power supply connector 33-1.

Although the power supply connector 33 is a single unit in common, each of the oiling units 1 and 2 is separately provided for maximum efficiency operation, and the high voltage power supply 25 can output different set voltages. It can be implemented even if formed. Further, as shown in FIG. 1, the selective refueling means 40 includes refueling means for the unit 1 (oil tank 41-1, pressurizing means 42-1 and piping) and refueling means for the unit 2 (oil tank 41-2). , Pressurizing means 42-2, piping, etc.), and any one of them can be selected for refueling. The means 40 includes the oil supply valves 35-1 and 35-2.

By the way, the power supply connector 33-2 shown in FIG. 1 is for charging the ionizer (18) with electricity when the ionizer (18) is provided in the air atomization mechanism 10 and is carried out as a charging atomized oil method. belongs to.

Here, the selection switching means 30, as shown in FIG. 1, is a selection for selectively setting light oil (air atomization type oil coating unit 1) or heavy oil coating (electrostatic atomization type oil coating unit 2). It consists of a switch 32 and a control panel 31, and it is a selected oiling unit 1 or 2.
Is a means for activating. Specifically, oil refueling valves 35-1, 35- that form a part of the selective refueling means 40 from the control panel 31.
Signals SO1 and SO2 for opening and closing 2, signal SA1 for opening and closing the air supply valve 34, and power supply connectors 33-1 and 33-2 ON-OFF
It is formed so as to output the signals SE1 and SE2 that cause it.
The drive signals for the pickup roller 16 and the like are omitted in the figure.

 Next, the operation will be described.

(Light oiling operation) Since this is an electrostatic oiling device that mainly uses light oiling products, the common power feeding mechanism 24 has a detaching mechanism 50 as shown on the left side of the strip S in FIGS. 1 and 2. The drive-in electrode 20 is attached in advance via.

Then, in the light oiling operation, "light oiling" is selected by the selection switch 32.

Then, the control panel 31 outputs signals SO1, SA1, SE1. Therefore, the pressurizing means 42-1 is activated, and the oil supply valve
35-1 is opened and oil is supplied to the air atomization mechanism 10. At the same time, the air supply valve is opened and the pickup roller 16 is rotated.

Here, from the air atomization mechanism 10, as shown on the left side of the strip S in FIG. 1, it is jetted toward the non-charged atomized oil-charging electrode 20 side.

Further, the power supply connector 33-1 is turned on, and the high voltage power supply is applied to the drive electrode 20. Here, the uncharged atomized oil jetted from the air atomization mechanism 10 is applied onto the strip S by the electrostatic action of each drive electrode 20 and the strip S.

(Heavy oil operation) First, the drive electrode 20 is removed, and instead of this, the spray head is used.
As shown on the right side of the strip S in FIGS. 1 and 2, 23 is attached to the common power feeding mechanism 24 via the attachment / detachment mechanism 50.
After that, use the selection switch 32 of the selection switching means 30 to perform "heavy coating".
Select

Then, this time, the control panel 31 outputs the signal SO2 and the signal SE1. Therefore, the power supply connector 33-1 is turned on and the high-voltage power supply 25 is connected to each spray head 23,
The pressurizing means 42-2 of the selective oil supply means 40 is activated and the oil supply valve 35-2 is opened.

Therefore, from each spray head 23, as shown on the right side of the strip S in FIG. 1, the charged atomized oil is sprayed and heavy coating oil can be formed on the strip S.

Thus, according to this embodiment, the air atomization type oil coating unit 1 and the electrostatic atomization type oil coating unit 2 are arranged in this order from the upstream side to the downstream side in the feeding direction of the strip S, The drive electrode 20 and the spraying head 23 can be exchangeably attached to the common power supply mechanism 24 through the attachment / detachment mechanism 50. Therefore, while the mainstream is light oil coating (heavy oil coating) products, It is possible to temporarily switch heavy oil (light oil) products to production. Moreover, the long drive electrode 20 and the plurality of spray heads 23 are exchanged at a common power supply mechanism 24, that is, at the same place, and the power supply mechanism 24, the high-voltage power supply 25, the strip feeding mechanism (not shown), etc. Since it is configured to be commonly used by one unit, the installation space and equipment cost can be significantly reduced compared to the conventional two-line installation.

Further, the attachment / detachment mechanism 50 has a simple structure including the support member 51 and the locking member 52, and is easy to handle.

In addition, the selection switching means 30 includes a selection switch 32 and a control panel 31.
Since it is configured so that the selection can be switched by one-touch operation, if only the work of replacing the drive electrode 20 and the spray head 23 is performed, thereafter, light oil (heavy oil) to heavy oil (light oil) can be used. The operation can be switched to oiling quickly and easily.

Furthermore, the selective refueling means 40 has separate 42-1, 35-1, 42
-2, 35-2, so that each coating efficiency can be maintained and the oil film thickness can be made uniform.

[Advantage of the Invention] According to the present invention, the air atomization type oil coating unit is arranged on the upstream side in the strip feeding direction, and the electrostatic atomization type oil coating unit is arranged on the downstream side, and is driven through the attaching / detaching mechanism. Since the electrode and the spray head are attached to and detached from the common power supply mechanism and switched to perform both light oiling operation and heavy oiling operation, the high voltage power supply, the strip feeding mechanism, the power feeding mechanism, Air atomization type and electrostatic atomization type oiling devices can be established simply by providing a drive electrode, an air atomizing mechanism, a atomizing head, and a detachable mechanism in addition to common components such as a main body for storing them. Since it is possible to switch between different types of operation, it is possible to economically and widely apply electrostatic coating that can efficiently produce various types of oil-coated products that are required for a long-to-medium term and temporarily while significantly reducing the installation space and equipment costs. An oil system can be provided.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of the present invention, FIG. 2 is a side view of essential parts, FIGS. 3 to 5 are diagrams showing a conventional electrostatic oiling device, and FIG. The atomization type charging system, FIG. 4 shows the air atomization type non-charging system, and FIG. 5 shows the electrostatic atomization type. 1 ... Air atomization type oiling unit, 2 ... Electrostatic atomization type oiling unit, 10 ... Air atomization mechanism, 20 ... Push-in electrode, 22 ...
… Slits, 23 …… Spraying head, 24 …… Power supply mechanism, 25…
… High-voltage power supply, 30 …… Selection switching means, 31 …… Control panel, 32…
… Selection switch, 40 …… Selective lubrication means, 50 …… Removal mechanism.

Claims (1)

(57) [Scope of utility model registration request] 1. An electrostatic atomizer having an air atomizing type oil coating unit formed including an air atomizing mechanism and a drive electrode on the upstream side in the strip feeding direction, and having a spraying head on the downstream side. An atomization type oil coating unit is provided, and a detaching mechanism is provided so that each of the drive electrode and the spray head can be detachably attached to a common power supply mechanism. An electrostatic oiling device, characterized in that the oiling operation is carried out by replacing the air atomizing type oiling unit with the electrostatic atomizing type oiling unit by switching the air atomizing type oiling unit and the electrostatic atomizing type oiling unit.