JP4878596B2 - Transfer method to transfer material - Google Patents

Description

  The present invention relates to a transfer method to a transfer material, for example, transferring microscopic irregularities on a transfer material such as a metal sheet.

Conventionally, for example, a number of techniques as disclosed in Patent Document 1 have been developed as a method of transferring microscopic irregularities on a material to be transferred such as a metal sheet.
In the transfer method to the metal plate surface of Patent Document 1, the metal sheet is transferred by rotating the transfer roll, and the uneven transfer portion transferred to the outer peripheral surface of the transfer roll is pressed against the transferred metal sheet. By doing so, a transferred portion having substantially the same uneven shape as the transfer portion of the transfer roll is formed on the surface of the metal sheet.
JP 2006-239744 A

The transfer method to the metal surface of Patent Document 1 is a technique of transferring a fine transferred portion of micron order, and in actual use, the height of the transferred transferred portion is constant due to various influences. There were some variations. Moreover, in order to intentionally change the height and shape of the transferred portion, it is necessary to change the height and shape of the transfer portion of the transfer roll, which is very difficult.
Therefore, in view of the above problems, the present invention provides a transfer material that can easily set the height of the transferred portion when transferring a micron-order fine shape to the transfer material. It is an object to provide a transfer method.

In order to achieve the above object, the present invention takes the following technical means.
That is, the technical means for solving the problem in the present invention is that the transfer portion of the transfer roll is pressed against the transferred material to be transferred, thereby transferring the transferred portion to the transferred material. In the method, in order to set the height of the transferred portion, the advanced rate of the transferred material relative to the transfer roll is controlled.
The inventor verified the conditions under which the height and shape of the transferred portion can be easily set from various viewpoints. As a result, the inventor has paid attention to the fact that the peripheral speed of the transfer roll and the transfer speed of the transfer material are related as factors that affect the height and shape of the transfer part. The inventor has found that the height and shape of the transferred portion can be easily set using an advanced rate that can represent the peripheral speed of the transfer roll and the transfer speed of the transferred material.

It is preferable to control the advance rate so that the height of the transferred portion is the same as the height of the transfer portion of the transfer roll.
It is preferable to control the advance rate so that the shape of the transferred portion including the height is the same as the shape of the transfer portion of the transfer roll.
In controlling the advanced rate, it is preferable to use the equation (1).

  In controlling the advanced rate, it is preferable to use Equation (2).

  According to the present invention, when a fine shape on the order of microns is transferred to a transfer material, the height of the transferred portion to be transferred can be easily set.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view of a transfer apparatus 1 for explaining a transfer method to a transfer material according to the present invention. The transfer device 1 includes a transfer roll 2, a transfer roll 3, and a support roll 4. The transfer roll 2 is for transferring a material to be transferred 5 such as a metal sheet, and is arranged on the upstream side and the downstream side when viewed from the transfer roll 3.
As shown in FIGS. 1 and 2, the transfer roll 3 is for transferring an uneven transferred portion 6 having a micron order (several μm to several hundred μm) onto the surface of a transferred transfer target material 5. A plurality of uneven transfer portions 7 are formed over the entire circumference of the outer peripheral surface of the transfer roll 3. Each transfer portion 7 is extended in the axial direction. The support roll 4 is disposed to face the transfer roll 3 and supports the opposite side of the transferred portion 6 of the transfer material 5.

In the transfer apparatus 1, the transfer material 5 is transferred from the upstream side to the downstream side by the rotation of the transfer roll 2, and the transfer portion 7 of the transfer roll 3 is placed on the surface of the transfer material 5 with a predetermined pressure (for example, under high pressure). By pressing with, irregularities can be formed on the transfer material 5.
In addition, the transfer apparatus 1 may be arrange | positioned in the most downstream side of the tandem rolling mill which rolls with respect to rolling materials, such as a metal sheet, and may be arrange | positioned as an independent transfer line. Further, the transfer device 1 itself may be provided in the tandem rolling mill by providing the transfer roll 3 on the most downstream side of the tandem rolling mill.

The transfer method to the transfer material of the present invention will be described below.
FIG. 2 is a diagram showing a state in which the transfer roll 3 is in contact with the transfer material 5.
As shown in FIG. 2A, considering the state in which the transferred portion 6 is formed on the transfer material 5, the transfer portion 7 of the transfer roll 3 rotating in the circumferential direction is placed on the surface of the transfer material 5. When pressed, the surface of the transfer material 5 is gradually deformed by this pressing, and the uneven transferred portion 6 is formed on the surface.
As shown in FIGS. 2A and 2B, at the position (position P) where the transfer portion 7 of the transfer roll 3 is closest to the surface of the transfer material 5, the transfer roll 3 is placed on the surface of the transfer material 5. The unevenness having the same shape as that of the transfer portion 7 is formed.

As shown in FIG. 2C, the transfer portion 7 of the transfer roll 3 gradually moves away from the surface of the transfer material 5 when the transfer portion 7 is downstream of the position P due to the rotation of the transfer roll 3. A position Q indicates a state immediately before the transfer portion 7 of the transfer roll 3 is separated from the transfer material 5.
As described above, when the transfer portion 7 of the transfer roll 3 performs the transfer to the transfer material 5, the same shape pressed by the transfer portion 7 at the position P is transferred to the surface of the transfer material 5. Therefore, even after the transfer portion 7 of the transfer roll 3 is separated from the transfer material 5 on the downstream side of the position P (downstream side of the position Q), the surface of the transfer material 5 is the same as the transfer portion 7 of the transfer roll 3. Shape irregularities should be formed. However, in practice, the shape formed on the surface of the transfer material 5 may be different from the shape transferred by the transfer roll 3.

Therefore, the inventor verifies the situation in which the transfer portion 7 is transferred to the transfer material 5 as shown below, so that the shape of the transfer portion 6 becomes the same as the shape of the transfer portion 7 of the transfer roll 3. The present inventors have found conditions, and have found a method that can easily set the height and shape of the transferred portion 6 to be transferred when transferring a micron-order fine shape to the transfer material 5.
First, as shown in FIG. 2B, with reference to the position P when the shapes of the transfer portion 7 and the transferred portion 6 coincide with each other, the positions of the transfer portion 7 and the transferred portion 6 after t1 seconds from this reference. Think about movement.
Here, at the position P, the first top N1 located on the rear side in the rotation direction in the convex (trapezoidal) transfer unit 7 and the front side in the transfer direction on the convex (trapezoidal) transfer target part 6. It is assumed that the first bottom part S1 substantially coincides with the reference point O. The x axis is the same as the transfer direction of the transfer material 5, and the y axis is the same as the thickness direction of the transfer material 5.

  As shown in FIG. 2C, on the transfer roll 3 side, the movement amount of the first top portion N1 of the transfer portion 7 after t1 seconds is expressed by equations (3) and (4).

In Expressions (3) and (4), L1 is a horizontal movement amount (horizontal movement amount) of the first top N1, and Z1 is a vertical movement (thickness direction) movement amount (vertical movement amount) of the first top N1. ).
On the other hand, on the transfer material 5 side, the movement amount of the first bottom portion S1 of the transferred portion 6 after t1 seconds is expressed by Expression (5) and Expression (6).

In the equations (5) and (6), L2 is the horizontal movement amount of the first bottom portion S1, and Z2 is the vertical movement amount of the first bottom portion S1.
FIG. 3 shows the positions of the transferred portion 6 and the transfer portion 7 after t1 seconds.
As shown in FIGS. 2C and 3, the front side in the transfer direction (the preceding side when moving in the transfer direction) of the second top portion N2 and the third top portion N3 in the transferred portion 6 after t1 seconds. The coordinates (x, y) of the second apex N2 in the equation (5) and (6) can be expressed as coordinates (x, y) = (L2-a, b) of the second apex N2. .

Here, a represents the horizontal distance (horizontal component) from the bottom S1 that is the reference in the transferred portion 6 to the second top N2, and b is the second distance from the bottom S1 that is the reference in the transferred portion 6. The vertical distance to the top N2 (the height of the transferred portion 6 and the vertical component) is shown.
In addition, after t1 seconds, the coordinates (x, y) of the first apex portion N1 of the transfer portion 7 can be expressed as (x, y) = (L1, Z1) by the equations (3) and (4). it can.
The transfer portion 7 moves away from the transferred portion 6 as it goes downstream from the position P. However, in the process in which the transferred portion 7 moves away from the transferred portion 6, the first top portion N1 is more than the second top portion N2. When positioned on the reference point side, the two overlap each other, so that the transferred portion 6 is scraped by the first top portion N1, and the transferred portion 6 is deformed.

Therefore, considering the conditions for not cutting the transferred portion 6 of the transfer material 5 at the first top portion of the transfer portion 7 of the transfer roll 3 (not to deform the transferred portion 6), at least t1 seconds after the position P. When the first top portion N1 is the same height as the second top portion N2 (y = Z1 = b), and the first top portion N1 precedes the second top portion N2, the transfer unit 7 transfers the object. The part 6 is not cut and does not deform.
That is, after t1 seconds, the condition (7) in which the x coordinate of the first top N1 is larger than the x coordinate of the second top N2 is a condition. When formula (7) is arranged, formula (8) is obtained.

  When the first apex N1 reaches the second apex N2 (Z1 = b), the y coordinate is expressed by the equation (9). When the time t1 is obtained from the equation (9), the equation (10) is obtained.

  Further, the transfer speed of the transfer material 5 is represented by the formula (11) by the formula of the advanced rate.

  By substituting Equation (11) and Equation (10) into Equation (8), Equation (1) is obtained. By satisfying Equation (1), the material to be transferred is transferred at the first top of the transfer portion 7 of the transfer roll 3. Thus, the 5 transferred portion 6 is not cut.

In other words, in the transfer method to the transfer material 5 of the present invention, the transfer material 5 is transferred at the first top of the transfer portion 7 of the transfer roll 3 by controlling the advance rate under the condition of the expression (1). In other words, the shape including the height of the transferred portion 6 is made the same as the height and shape of the transferred portion 7 of the transfer roll 3.
Specifically, when performing transfer to the transfer material 5, the shape of the transfer portion 6, that is, the horizontal component a and the vertical component b are set, and the reduction rate of the transfer roll 3 and the transfer roll 3 are put in and out. In order to satisfy the formula (1), the advanced rate calculated by the formula (12) after setting the plate thickness of the transferred material 5 on the side, the tension on the upstream and downstream sides of the transferred material 5, and the friction coefficient Change the condition.

When transferring to the transfer material 5, for example, by increasing the upstream tension or decreasing the downstream tension so that the advance rate satisfies the formula (1), The shape of the transfer unit 6 is not changed. In reducing the downstream tension, the peripheral speed of the downstream transfer roll 2 is decreased, and in increasing the upstream tension, the peripheral speed of the upstream transfer roll 2 is decreased. When controlling the advance rate, it is preferable to control in consideration of the change of the advance rate with respect to the tension as shown in FIG.
FIG. 5 shows the locus of the first top portion of the transfer roll 3 and the shape of the transferred portion 6 when the advance rate is controlled so as to satisfy the expression (1) after initial setting as shown in Table 1. This is a simulation of the relationship. Specifically, the exit side tension σf was changed while maintaining the entry side tension σb so as to satisfy the expression (1) under the conditions shown in Table 1.

As shown in FIG. 5, since the locus of the transfer unit 7 hardly overlaps the transferred unit 6, the transferred unit 6 of the transfer roll 3 is not scraped off by the transfer unit 7 of the transfer roll 3, and the transfer unit of the transfer roll 3. The shape transferred by 7 is transferred onto the surface of the transfer material 5.
In controlling the advance rate, in addition to the tension applied to the transfer material 5, as shown in FIG. 6, the reduction rate of the transfer roll 3 relative to the transfer material 5 may be changed, or as shown in FIG. In addition, the advance rate may be controlled by changing the roll coefficient of the transfer roll 3 to change the friction coefficient. Further, the radius of the transfer roll may be changed.

In the above description, the advance rate is controlled so that the shape of the transferred portion 6 does not change. However, the advanced rate is set so that at least the height of the transferred portion 6 can be appropriately set among the shapes of the transferred portion 6. The rate can also be controlled.
In this case, paying attention to the second top portion N3 on the rear side in the transfer direction among the second top portion N2 and the third top portion N3 in the transferred portion 6, the horizontal distance at the second top portion N3 (in the transferred portion 6) The horizontal distance from the reference bottom S1 to the second top N3 is a ′, and the vertical distance at the second top N3 (the vertical from the reference bottom S1 to the second top N3 in the transferred portion 6). When the distance) is b ′ and each a ′ and b ′ is replaced with the above a and b, the equation (2) can be derived.

That is, when transferring to the transfer material 5, the horizontal component a ′ and the vertical component b ′ of the transferred portion 6 are set and the advance rate is controlled to change the shape of the transferred portion. The height of the transfer unit 6 can be changed as appropriate.
FIG. 8 simulates the relationship between the locus of the first top of the transfer roll 3 and the shape of the transferred portion 6 when the advance rate is controlled so as to satisfy the expression (2). As shown in FIG. 8, although the locus of the transfer portion 7 overlaps with the transferred portion 6 and cuts a part thereof, the second top portion N3 of the transferred portion 6 is not cut and at least the second top portion N3 is left. The transferred portion 6 can be formed as it is (while maintaining the height).

In setting the horizontal components a and a ′ and the vertical line segments b and b ′ in the transferred portion 6, the horizontal components a and a ′ and the vertical line segments are satisfied under the conditions satisfying the expressions (1) and (2). By repeatedly calculating b and b ′ from 1 to 100 μm (convergence calculation), the combination of the horizontal components a and a ′ and the vertical line segments b and b ′ can be determined.
FIG. 9 is a diagram showing a combination of these by calculating convergence between the horizontal components a and a ′ and the vertical line segments b and b ′ under the conditions of the expressions (1) and (2) and Table 1. It is. In FIG. 9, if it is in the range G, the formulas (1) and (2) are satisfied.

As shown in FIG. 9, for example, when the vertical components b and b ′ are fixed to 20 μm, the horizontal components a and a ′ may be set to about 70 μm or more.
The transfer method to the transfer material of the present invention is not limited to the above embodiment. According to the present invention, since the height of the transferred portion 6 to be transferred can be easily made constant or the shape can be set to a predetermined shape, for example, for manufacturing a metal plate or hologram for PHE, etc. Is suitable.
In the metal plate for PHE, securing the surface area, that is, increasing the surface area is very important from the viewpoint of improving heat conductivity. When the metal plate for PHE is manufactured, the surface area of the transferred portion 6 is set according to a predetermined method by the method of the present invention, so that the surface area of the metal plate can be reliably increased, and the heat conductivity is improved. A very good metal plate can be easily manufactured.

It is a schematic diagram of a transfer device. It is explanatory drawing which shows the state of transcription | transfer. It is a coordinate diagram which shows the position of the transfer part and to-be-transferred part after t1 time. It is the figure which showed the relationship between tension | tensile_strength and an advanced rate. It is the figure which showed the relationship between the locus | trajectory of the 1st top part at the time of transferring on the conditions which satisfy | fill Formula (1), and the shape of a to-be-transferred part. It is the figure which showed the relationship between a rolling reduction and an advanced rate. It is the figure which showed the relationship between a friction coefficient and roll speed (peripheral speed). It is the figure which showed the relationship between the locus | trajectory of the 1st top part at the time of transferring on the conditions which satisfy | fill Formula (2), and the shape of a to-be-transferred part. FIG. 6 is a diagram illustrating a combination of a horizontal component and a vertical component in a transferred portion.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transfer apparatus 2 Transfer roll 3 Transfer roll 4 Support roll 5 Transfer material 6 Transfer part 7 Transfer part

Claims (5)

In the transfer method to the transfer material, the transfer portion is transferred to the transfer material by pressing the transfer portion of the transfer roll against the transferred transfer material.
A transfer method to a transfer material, wherein an advance rate of the transfer material with respect to the transfer roll is controlled to set a height of the transfer portion.   2. The transfer method to a transfer material according to claim 1, wherein the advance rate is controlled so that the height of the transfer portion is the same as the transfer portion of the transfer roll.   2. The transfer method to a transfer material according to claim 1, wherein the advance rate is controlled so that the shape of the transfer-receiving portion including the height is the same as the shape of the transfer portion of the transfer roll. The method for transferring to a transfer material according to claim 1, wherein the advanced rate is controlled by using formula (1).

3. The transfer method to a transfer material according to claim 1, wherein Formula (2) is used for controlling the advanced rate.

Images