JP2546923Y2 - Oiling equipment for metal strip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a coating apparatus for uniformly applying a very small amount of flowing oil onto a metal strip.

(Prior Art) In general, in the case of applying fluid oil to a metal strip of this type, in the conventional case, oil is applied by an electrostatic oiling method.
For refueling, JP-A-1-159086, JP-A-61-93
As disclosed in Japanese Patent Publication No. 865 and the like, oil is sprayed in a bell shape by a nozzle and supplied.
As shown in Japanese Patent No. 58792 and Japanese Patent Application Laid-Open No. 48-20826, among the atomized oil particles sprayed from the nozzle, only the floating fine particles are generated by the transport of the metal strip. It is known to carry or supply by means of a supply air stream.

(Problems to be Solved by the Invention) Here, when the former is sprayed and supplied in a bell shape, the distribution of oil particles is different between the peripheral portion and the central portion of the bell shape, so that the spray from the nozzle is extremely difficult. It is extremely difficult or impossible to apply a small amount of lubricating oil uniformly over the entire surface.
Also, in the latter case, since the gas flow due to the metal strip conveyance is different between the center and the end in the width direction of the metal strip, the flow of the air itself cannot be made uniform with the supply air flow. However, each of them has a problem that a very small amount of lubricating oil cannot be uniformly applied to the metal strip.

When these conventional methods are carried out, the oiling device requires various facilities such as a charging device, an atomizing device, and an atomizing oil storage room as a whole, and the entire device becomes large-scale and complicated. There are also safety and cost problems associated with the use of solvents and static electricity.

An object of the present invention is to solve the above-mentioned problems and to provide an oiling device for a metal strip which is capable of uniformly applying a very small amount of flowing oil onto the metal strip.

(Means for Solving the Problems) The present invention is directed to a pickup roll which is rotated by partially immersing it in flowing oil in an oil tray, and which is adapted to be pressed against the pickup roll and rotated while being in contact with the pickup roll. A roll with metal cells having several cells, a doctor blade abutting on the outer peripheral surface of the roll with cells, receiving fluid oil in the cells of the roll with cells, pressing against the metal strip plate and pressing the metal strip. In a metal strip lubricating apparatus including a rubber application roll for lubricating a plate, an appropriate number of minute cells partially connected in a circumferential direction of the roll to the outer peripheral surface of the roll with the cells are provided. An oiling device for a metal strip, wherein the above-mentioned cell assembly portions are provided at a desired pitch in each of the axial direction and the circumferential direction of the roll with cells.

(Operation) In the device of the present invention, of the fluid oil transferred from the pickup roll to the outer peripheral surface of the roll with cells, the fluid oil other than the one in the cell is scraped off by the doctor blade, and only the fluid oil in the cell is transferred to the application roll. Then, it is press-applied onto a metal strip via an application roll.

At this time, the flowing oil is spread to form a thin oil film, but instead of simply reducing the size of the cells in proportion to the amount of applied oil, the outer circumference of the roll with the cells is applied in the circumferential direction of the roll. A cell assembly part composed of an appropriate number of microcells, some of which are connected, and provided at a desired pitch in each of the axial direction and the circumferential direction of the roll, so that the microcells are connected at the connected locations. When the fluidized oil causes coagulation action and the excess fluid oil outside the microcell is scraped off by the doctor blade, the fluid oil inside the microcell is pulled by the excess fluid oil that is scraped off by the doctor blade. It is possible to prevent scraping and to reduce the variation in the amount of applied oil. As a result, it becomes possible to apply an extremely small amount of flowing oil evenly to the metal strip.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1 showing the apparatus of the present embodiment, 1 is an oil tray, 2 is a fluid oil contained in an oil dish 1, 3 is a pickup roll partially immersed in the fluid oil and rotated clockwise, 4 is This is a metal roll with a cell that is pressed against the pickup roll 3 and rotates counterclockwise.
A large number of microcells are provided on the outer peripheral surface in contact with. 5 is a doctor blade in contact with the outer peripheral surface of the roll with cells, 6 is a rubber application roll which is pressed against the roll with cells 4 and rotates clockwise, and 7 is pressed against the application roll 6 and goes upward in the figure. The metal strip to be conveyed, 8 is a backup roll, and 9 is a guide roll.

In the case of this embodiment, the fluid oil 2 in the oil tray 1 adheres to the outer peripheral surface of the pickup roll 3 and is pumped up, and the pumped fluid oil is transferred to the inside and the outer peripheral surface of the minute cell of the roll 4 with cells. At the same time, the fluid oil adhering to the outer peripheral surface is removed by the doctor blade, and the fluid oil remains only in the minute cells. Next, the flowing oil in the microcells of the roll with cell 4 is received by the application roll 6 and further applied to the metal strip.

In the present embodiment, a roll with a cell was used in order to apply a uniform and extremely small amount of oil on the aluminum alloy strip 7 which is transported at a rate of 130 m / min with liquid paraffin having a low viscosity of 75 to 80 cps. The experiment was repeated with various changes in the size and arrangement of the cell No. 4. As a result, the following was found.

That is, in order to apply a small amount of fluid oil, it is generally known to reduce the size of the cell. However, simply reducing the size of the cell increases the transport speed of the metal strip 7. As the doctor blade 5 scrapes off the fluid, the speed increases, and the excess fluid oil on the surface of the roll 4 scraped off by the doctor blade 5 pulls out most of the fluid in the cell. It was found that the tendency for the oil to spread became stronger, and that the amount of oil applied varied.

Therefore, it was confirmed that, in the following manner, the fluid oil remaining in the cell was not easily scraped off by a doctor blade, and was suitable for applying a low-viscosity liquid paraffin uniformly and in a very small amount.

In this embodiment, as shown in FIG. 2, the axial length t1 of the roll 4 with cells is 0.3 mm, and the circumferential length t2 is 0.6 mm.
Is provided as one section, and the cell assembling section 10 is provided.
With axial pitch P1 = 1.25mm, circumferential pitch P2 = 3.6mm
Then, it is arranged on the outer peripheral surface of the roll 4 with cells so that the width is substantially equal to the width of the metal strip, and as shown in FIG.
Each of the cell aggregates 10 is screened on a # 250 screen so that the halftone dot area ratio (the ratio of the total area of the minute cells to the area t1 × t2 of the cell aggregate) occupies 90%, and the cell aggregates 10 are finely divided in the circumferential direction of the roll. A part of the cells is configured to be connected, and the action (agglomeration action) of attracting the fluid oils in the microcells to each other at the connected points is generated. The shape was made difficult to be pulled out by being pulled by excess fluid oil.

It was oiled on a metal strip by using the oiling device configured as described above, 26~39mg / m ² and very Oiling the range of trace is obtained by coating an oil in dispersion 12 mg / m ² Was completed.

This variation is 1/3 of the variation (about 39 mg / m ² ) in the conventional electrostatic coating method performed for comparison.
The following shows that the oil was greatly improved and the oil was evenly applied.

Also, the one that only reduced the size of the cell,
After all, the dispersion was large (about 40 mg / m ² ), and uneven oiling was noticeable.

In this example, the viscosity of paraffin is 75 to 80 cps.
However, as a result of the experiment, it has been found that the same effect can be obtained if it is within the range of 10/100 cps.

Further, in the present embodiment, the dot area ratio of the small cells in one cell aggregate is defined to occupy 90%, but is not always limited to that, and an appropriate number of the small cells It is only necessary to be configured so that they are connected in the circumferential direction, and can be appropriately increased or decreased in accordance with the conditions so that a desired amount of oil can be obtained. It is also possible to change and deal with it.

Further, even if a rubber transfer roll is provided between the roll with the cell and the application roll for convenience of the equipment, and the fluid oil is sequentially transferred in the order of the roll with the cell → the transfer roll → the application roll, it is the same as in the present embodiment. Oiling is done.

(Effects of the Invention) According to the present invention, not only is it unnecessary to use a complicated coating device that uses static electricity as in the past, but also the coating can be performed without a solvent in equipment, which is advantageous in terms of safety and cost. is there.

In addition, a cell assembly section composed of an appropriate number of micro cells connected to the outer circumference of the roll with cells in the circumferential direction of the roll,
By providing at a desired pitch in each of the axial direction and the circumferential direction of the roll, it becomes difficult for the fluid oil of the microcells to be scraped out by the doctor blade, and the transfer of the fluid oil is not impaired and the oil is stably applied. Can be. Therefore, when a very small amount of low-viscosity fluid oil is applied to the metal strip, the variation in the amount of applied oil can be reduced, and the oil can be applied to a substantially uniform thickness.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of the device of the present invention, FIG. 2 is a partially enlarged view of the outer peripheral surface of a roll with cells, and FIG. 3 is an enlarged view of a cell collecting portion. In the drawing, 1 ... oil tray, 2 ... fluid oil, 3 ... pickup roll, 4 ... roll with cell, 5 ... doctor blade,
6 Application roll, 7 Metal strip, 10
... cell assembly part.

Claims (1)

(57) [Scope of request for utility model registration] 1. A pick-up roll which rotates by partially immersing it in flowing oil in an oil tray, and a metal cell which is rotated by pressure contact with the pick-up roll and has an appropriate number of cells on its contact outer peripheral surface. A roll, a doctor blade that comes into contact with the outer peripheral surface of the roll with cells, and a rubber application roll that receives fluid oil in the cells of the roll with cells and presses against the metal strip to apply oil to the metal strip. In the metal strip plate oiling device comprising, on the outer peripheral surface of the roll with a cell, a cell assembly portion composed of an appropriate number of micro cells partially connected in the circumferential direction of the roll,
An oiling device for a metal strip, wherein the rolls with cells are provided at a desired pitch in each of an axial direction and a circumferential direction.