JPH10244199A - Die coater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To switch a coating operation in opposite, offset or transfer mades. SOLUTION: The die coater for continuously coating the surfaces of the metallic webs W while transporting the webs has the die 6 provided with a lip on the front edge, a backup roll 2 arranged approximately to face the lip, an upstream side tension roll 3 for regulating the feeding angle of the metallic webs W to the backup roll 2 and a downstream side tension roll 4 for regulating the take-off angle of the metallic webs W from the backup roll 2. The die 6 is made vertically movable. A second backup roll 5 for changing a path line is arranged on the side opposite to the die 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die coater, and more particularly, to a die coater for continuously coating a surface of a metal web while conveying the same.
The present invention relates to a die coater capable of switching a coating operation by offset or transfer.

[0002]

2. Description of the Related Art A die coater is a device for continuously coating a sheet surface. The die coater has a die for forming a paint discharge slot formed in a horizontal direction and a lip forming a slot opening at a front edge thereof. A backup roll that is disposed opposite to and supports the sheet being conveyed from the back, an upstream tension roll that defines a feed angle of the sheet transferred to the backup roll, and a take-up angle of the sheet transferred from the backup roll. A downstream tension roll is provided to discharge the coating material from the lip while conveying the sheet, and coat the sheet surface on the backup roll.

[0003] With regard to the novel technique relating to the die of the die coater as described above, the present applicant has previously applied for a patent as a die coater for continuously coating a metal web. For example, a die coater provided with a die whose coating width can be easily adjusted without disassembling the die (JP-A-6-198240), and a die coater capable of easily changing the paint without disassembling the die Die coater (JP-A-6-47334).

In general, in continuous coating of a sheet, a coating operation using an opposite or a coating operation using an offset is selected from the relationship between the thickness of the sheet and the thickness of a coating film to be formed. When performing the coating operation with the opposite,
A die coater with a die is used so that the paint is discharged at a position substantially along the horizontal diameter of the backup roll. A die coater in which a die is arranged so that the paint is discharged is used. When both the thickness of the sheet and the thickness of the coating film are large, a transfer coating apparatus that applies a paint to the sheet being conveyed by a transfer roll is used.

[0005]

By the way, the specifications of metal webs that require painting are extremely diverse, and if it is not intended to carry out a wide variety of coatings according to the type of metal web and the thickness of the coating film. Since two types of die coaters and transfer coating apparatuses as described above are required, there is usually the fact that it is difficult to reduce the coating cost due to large capital investment. In recent years, there has been a demand for higher quality coating with respect to the finished state of the coating film, that is, thickness uniformity, coating unevenness, surface smoothness, and the like.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a die coater for continuously coating a surface of a metal web while transporting the same, and performing a coating operation using an opposite, an offset or a transfer. It is an object of the present invention to provide a novel die coater which is switchable and can also be used for a coating method.

[0007]

In order to solve the above-mentioned problems, a die coater of the present invention is a die coater for continuously coating a surface of a metal web while conveying the metal web. A die formed and provided with a lip at the front edge thereof to form the opening of the slot, a backup roll disposed substantially opposite to the lip and supporting the metal web being transported from the back, and the backup roll An upstream tension roll that is also arranged below and defines the feeding angle of the metal web to the backup roll, and a downstream tension roll that is arranged above the backup roll and defines the take-up angle of the metal web from the backup roll. A tension roll, and the die is configured to be vertically movable;
On the side opposite to the die with respect to the backup roll, a second backup roll for changing a pass line is disposed, and the opposite coating is applied, offset coating, and transfer using the backup roll as a transfer roll. It is characterized in that each coating operation of coating can be switched.

In the above-mentioned die coater, the upstream tension roll, the backup roll, and the downstream tension roll are sequentially wound with a metal web, thereby forming a pass line for a coating operation using an opposite or an offset. The die that can be raised and lowered is positioned so that the direction of discharge of the paint from the lip is approximately along the horizontal diameter of the backup roll in the case of the coating operation by the opposite, and in the case of the coating operation by the offset, the paint from the lip is The discharge direction is located out of the horizontal diameter of the backup roll. Then, the die discharges the paint from the lip toward the surface of the metal web to be conveyed.

On the other hand, the upstream tension roll, the second backup roll, and the downstream tension roll form a pass line for a coating operation by transfer by sequentially winding a metal web around them. The die discharges the paint from the lip toward the surface of the backup roll in the case of the transfer coating operation, and the backup roll rotates as a transfer roll and applies the paint supplied from the die to the surface of the metal web I do.

In the die coater, it is preferable that the die is configured to be horizontally movable in order to perform coating with higher quality. The horizontally movable die can adjust the separation distance to the metal web in the case of the coating operation by the opposite or the offset, and can adjust the separation distance to the backup roll functioning as the transfer roll in the case of the coating operation by the offset.

In each of the above aspects, the second backup roll is configured to be movable to move the changed pass line closer to or away from the backup roll in order to increase the coating accuracy by transfer. Is preferred. In other words, the second movable
Can adjust the contact state of the metal web with the backup roll in the coating operation by transfer.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a die coater according to the present invention will be described with reference to the drawings. FIG. 1 is a side view showing the arrangement of a die and each roll in a die coater according to the present invention. FIG. 2 is a front view showing the structure of the die from the lip side.

As shown in FIG. 1, the die coater of the present invention comprises:
This is a device for continuously coating the surface of a metal web (W) while transporting the same, and is capable of switching between each coating operation of an opposite coating, an offset coating and a transfer coating. The die coater shown in FIG. 1 is configured using a frame (1) formed in a substantially box shape, and has a slot (64) (see FIG. 2) for discharging paint, which is formed in a horizontal direction, and has a front edge. A die (6) provided with a lip (64c) (see FIG. 2) forming an opening of the slot (64), and a metal web (W) disposed substantially opposite to the lip (64c) and being conveyed. Roll (2) supporting the back from the back, and a metal web (W) disposed below the backup roll (2) and attached to the backup roll
Tension roll (3) for defining the feeding angle of the roll, and downstream tension roll (4) arranged above the backup roll (2) and defining the take-up angle of the metal web (W) from the backup roll. And

In the present invention, examples of the metal web (W) include a thin plate of aluminum, stainless steel, steel, plated steel, etc.
mm. On the other hand, examples of the paint include a clear paint containing a fluorine resin or a polyester resin as a component, a metallic paint containing an aluminum powder or a brass powder as a metallic pigment, and an acrylic resin or an alkyd resin as a vehicle resin component. .

As shown in FIG. 1, the die (6) has a die body (6a) for substantially forming a paint flow path and a wide support block (6) for supporting the die body from a rear end face. 6b). The die body (6a) is composed of upper and lower molds (61, 61) as shown in FIG. A manifold (63) is formed inside the die body (6a) along the longitudinal direction. Further, between the upper and lower molds (61, 61), that is, the upper and lower molds (61, 6).
Between the separation surfaces on the front side of 1), a manifold (63)
Is formed at the front edge of the die protruding toward the front side of the die body (6a), and paint is discharged as a discharge port forming an opening of the slot (64). Lip (64c) is provided.

In the die body (6a), FIG.
As shown in (1), a pair of thin deckles (93) are interposed in the slots (64) in a liquid-tight state in order to adjust the coating width. Each deckle (93) has a manifold (6
3) Each of the deckle shafts (92) is provided at the tip of a pipe-shaped deckle shaft (92) inserted from the opening at both ends, and the motor or ball screw supported on the support block (6b) side. The inside of the manifold (63) is configured to be movable by a moving mechanism (97) including the above. The movement of the deckle shaft (92) changes the distance between the deckles (93) and adjusts the coating width.

The paint used for the coating is applied to the die body from the base end side of each deckle shaft (92) through a space in the deckle shaft (92) (hereinafter referred to as a paint flow path). It is supplied to the manifold (63) of (6a). Then, the ink is discharged from the lip (64c) through the slot (64) whose width is defined by each deckle (93). The supply amount and the supply pressure of the paint are determined according to the gap distance of the slot (64), the coating width, the coating speed, and the like. In the above-mentioned die body (6a), a flow-blocking pig is inserted into the paint flow path of the deckle shaft (92) in a liquid-tight and slidable manner, so that the paint flow of any of the deckle shafts (92) is made. A mechanism for changing the paint (color change) by selectively blocking the road may be provided.

As the backup roll (2) in FIG. 1 for supporting the metal web (W), a metal roll having a higher hardness than the metal web (W) is usually used.
The backup roll (2) also functions as a transport roll of a transport line for the metal web (W), and is horizontally supported on the upper portion of the frame (1). Moreover, the backup roll (2) and the lip (64c) of the die body (6a) are arranged in parallel and in parallel.

The axial length of the backup roll (2) is set longer than the width of the metal web (W). The diameter of the backup roll (2) is set based on the material and thickness of the metal web (W), the viscosity of the paint, and the like. Such a diameter has such a curvature that the applied paint does not flow and is large enough to support the metal web (W).
It is about 200 to 1000 mm. Metal web (W)
The pass line is a line wound from substantially below to substantially above the backup roll (2) in order to enhance the adhesion of the paint applied to the surface thereof.

The upstream tension roll (3) is located horizontally upstream of the backup roll (2) in the direction of transport of the metal web (W), that is, below the frame (1) below the die body (6a). It is supported by. Backup roll (2) as upstream tension roll (3)
Similarly, a metal roll having a higher hardness than the metal web (W) is used. The diameter of the upstream tension roll (3) is 20 times the diameter of the backup roll (2).
It is set to about 100%. The first function of the upstream tension roll (3) is to shape the side edge of the metal web (W) transferred to the backup roll (2) and to prevent the metal web (W) from lifting, and The second function is a function for defining a feeding angle of the metal web (W) to the backup roll (2) and preventing entrainment of air during coating.

The feeding angle to the backup roll (2) means a metal web (W) extending from the upstream tension roll (3) to the backup roll (2) with respect to a horizontal virtual plane including the diameter of the backup roll (2). ) Means the angle of the flat portion on the die body (6a) side. In the case of the opposition or the offset coating, the feeding angle to the backup roll (2) is usually set to about 60 to 120 °. Further, the upstream tension roll (3) is configured to be movable in a substantially horizontal direction in order to adjust the feed angle according to the material of the metal web (W), the composition of the coating material, the thickness of the coating film, and the like. You. As the moving mechanism of the upstream tension roll (3), for example, a jack (31) attached to the frame (1) and moving the bearing of the upstream tension roll (3) is used.

The downstream-side tension roll (4) is positioned horizontally on the downstream side in the transport direction of the metal web (W) with respect to the backup roll (2), ie, above the frame (1) above the die body (6a). It is supported by. As the downstream tension roll (4), a backup roll (2)
Similarly, a metal roll having a higher hardness than the metal web (W) is used. The diameter of the downstream tension roll (4) is 20 times the diameter of the backup roll (2).
It is set to about 100%. The first function of the downstream tension roll (4) is that of the upstream tension roll (3).
The function is to prevent the metal web (W) from floating on the backup roll (2) in the same manner as described above.
The function of (1) regulates the take-off angle of the metal web (W) from the backup roll (2) and regulates the flow of paint immediately after coating.

The take-off angle from the backup roll (2) means a metal web (W) extending from the backup roll (2) to the downstream tension roll (4) with respect to a horizontal virtual plane including the diameter of the backup roll (2). ) Means the angle of the flat portion on the die body (6a) side. In the case of opposition or offset coating, the take-off angle from the backup roll (2) is usually 120 to 180.
° is set to about. Also, the material of the metal web (W),
In order to adjust the take-off angle according to the composition of the coating material, the thickness of the coating film, and the like, the downstream tension roll (4) is configured to be movable substantially vertically. As a moving mechanism of the downstream tension roll (4), for example, a hydraulic cylinder device (41) attached to the frame (1) and swinging a bearing of the upstream tension roll (3) via a link is used. You.

In the die coater of the present invention, the die (6) is used to switch between the opposite coating and the opposite coating.
Is configured to be able to move up and down. Specifically, the die (6)
It is mounted on the die base (8) and mounted on the moving base (7) together with the die base. The moving base (7)
The frame (71) is constructed to stand substantially vertically on the front edge of a horizontal plate-like base.
Is attached to a linear guide (72) provided vertically along the line. The die base (8) moves up and down together with the die (6) by advancing and retreating a rod of a jack (84) provided on the bottom surface side of the die base (8).

The die (6) is configured to be horizontally movable in order to adjust the separation distance from the backup roll (2) with high accuracy. Further, in this case, the operation of retracting the die (6) for avoiding the seam of the metal web (W) and the operation of avoiding foreign matter adhering to the surface of the metal web (W) are performed quickly, and the lip of the die (6) is In order to adjust the separation distance between the metal web (W) or the backup roll (2) with higher accuracy, the die (6) can be moved by a horizontal moving mechanism that functions in at least two stages in the horizontal direction. Be composed. That is, the horizontal movement mechanism of the die (6) includes a horizontal coarse movement mechanism for adjusting the separation distance from the lip (64c) to the surface of the backup roll (2) in a large range, and a horizontal fine movement mechanism for adjusting the separation distance in a minute range. Consists of

The above-mentioned horizontal coarse movement mechanism comprises a moving base (7)
Is configured as a moving mechanism. Specifically, the moving base (7) on which the die (6) is mounted together with the die base (8) is mounted on a linear guide (12) on a horizontal frame (11) extended from the frame (1). . Then, the movable base (7) is moved forward and backward by a cylinder device (73) (only a rod is shown in the drawing) attached to the horizontal frame (11) side, and the die base (8) and the die (6) are moved.
At the same time, it moves at a relatively high speed and in a predetermined range in a direction of approaching and separating from the backup roll (2).

The range of movement of the die (6) by the horizontal coarse movement mechanism is such that the separation distance from the lip (46c) to the vertical tangent to the surface of the backup roll (2) on the die (6) side is -10.
The range is 0 to 1500 mm. In addition, the negative separation distance refers to a state in which the tip of the lip (64c) is located closer to the backup roll than the above-mentioned tangent to the surface of the backup roll (2), and may be set in a coating operation by offset. . Such a moving range is
The adjustment range of the separation distance from the lip (64c) to the tangent to the surface of the backup roll (2) may be at least the above range.

The horizontal fine movement mechanism is configured as a mechanism for moving the die (6) on the die base (8). Specifically, the die body (6a) and the support block (6b) of the die (6) each have a common die base (8).
It is mounted on the upper side via a linear guide (82). The die (6) moves in a direction approaching or moving away from the backup roll (2) by the advance and retreat of the cylinder device (83) attached to the die base (8).

Further, the first half of the die base (8) on the side of the backup roll (2) has a tower structure in which a support (80) is erected upward, and a die body (6a) of the die (6).
Is placed in a state inserted inside the column (80). Moreover, the side surface of the column (80) located on the opposite side to the backup roll (2) is
It is formed on an inclined surface inclined to the side. A cotter (8) having one side surface formed at the same inclination angle as the above-mentioned inclined surface
5) is inserted between the strut (80) and the wide support block (6b).

The cotter (85) is suspended by a screw bar extending vertically downward from a horizontal beam at the upper end of the support (80) of the die base (8). Such a screw bar is rotated by a servomotor attached to a beam at the upper end of the column (80), and the cotter (85) is moved up and down by the rotation of the screw bar. That is, the die (6) is pressed against the support (80) side of the die base (8) by the retreat of the cylinder device (83), the most advanced position on the die base (8) is defined, and the cotter (85) Is moved slightly in the direction of approaching and separating from the backup roll (2), that is, in the horizontal direction within a range of 0.001 to 5 mm.

In the die coater of the present invention, when performing a coating operation by transfer, the backup roll (2) functions as a transfer roll, so that the backup roll (2) is located on the side opposite to the die (6). Is a metal web (W) as shown by a chain line in FIG.
A second backup roll (5) for changing the pass line of the second backup roll is disposed. Similarly to the backup roll (2), a metal roll having a higher hardness than the metal web (W) is used as the second backup roll (5). The diameter of the second backup roll (5) is set to about 20 to 100% of the diameter of the backup roll (2).

Further, in order to increase the coating accuracy by the transfer, the second backup roll (5) is configured to be movable so that the changed pass line approaches and separates from the backup roll (2). As a moving mechanism of the second backup roll (5), for example, a jack (51) that is attached to the upper end of the frame (1) in a slightly inclined state and moves up and down the bearing of the second backup roll (5) is used. used.

When the pass line is changed (in the case of the line of the metal web (W) shown by a chain line in the figure), the feeding angle of the metal web (W) to the backup roll (2) is
Similarly to the above case, the angle is defined by the upstream tension roll (3), and the take-off angle from the backup roll (2) is defined by the second backup roll (5).

In the above case, the feeding angle to the backup roll (2) refers to the angle from the upstream tension roll (3) to the backup roll (2) with respect to a horizontal virtual plane including the diameter of the backup roll (2). Second backup roll (5) formed by flat portion of metal web (W)
Side, and the feed angle is usually 90 to 90 °.
It is set to about 150 °. The take-off angle from the backup roll (2) refers to a metal web (W) extending from the backup roll (2) to the second backup roll (5) with respect to a horizontal virtual plane including the diameter of the backup roll (2). ) Means the angle of the flat portion on the side of the second backup roll (5), and the take-off angle is usually set to about 120 to 180 °.

As described above, the die coater of the present invention can adjust the position of the die (6) and can change the pass line of the metal web (W). Each coating operation of offset coating and transfer coating using the backup roll (2) as a transfer roll is configured to be switchable.

Although not shown, the lip (6) of the die (6) in the coating operation by the opposite or the offset.
4c) and the metal web (W), and the distance between the lip (64c) of the die (6) and the backup roll (2) in the coating operation by transfer,
The jack (31), the cylinder device (41), and the cylinder device (5) are detected by optical sensors attached to the moving base (7) and the die base (8), respectively, and are separately provided by a control device such as a program controller.
1) It is adjusted by controlling the jack (84), the cylinder device (83), and the cylinder device (73).

The coating operation by the die coater of the present invention is performed as follows. In the die coater of the present invention, as shown in FIG. 1, an upstream tension roll (3), a backup roll (2), and a downstream tension roll (4) are formed by sequentially winding a metal web (W) around them. In this manner, a pass line for a coating operation using an opposite or an offset is formed. In this case, the downstream side tension roll (3) controls the operation of the jack (31), and thereby the metal web (W) to the backup roll (2).
The upstream tension roll (4) regulates the take-up angle of the metal web (W) from the backup roll (2) by controlling the operation of the cylinder device (41).

In the case of performing the coating operation by the opposite, the die which can be raised and lowered is positioned such that the direction of discharging the coating material from the lip is substantially along the horizontal diameter of the backup roll.
At this time, the die base (8) moves up and down by controlling the operation of the jack (84), and moves up and down.
Is positioned at a predetermined height. Also,
The movement base (7) moves horizontally to a predetermined position by controlling the operation of the cylinder device (73). Moreover, the die (6) is pressed toward the backup roll by controlling the operation of the cylinder device (83), and the most advanced position is defined by controlling the vertical movement of the cotter (85). As a result, the tip of the lip (64c) of the die (6) is horizontally fixed at a fixed distance from the backup roll (2) (the surface of the metal web (W)).
It is adjusted with high precision so as to be separated by 01 to 1.0 mm.

On the other hand, when the coating operation by offset is performed, the die (6) which can be raised and lowered is in a state where the direction of discharge of the paint from the lip (64c) is out of the diameter of the backup roll (2), specifically, The discharge direction is 1 to 50 mm from a position substantially along the horizontal diameter of the backup roll (2).
It is located in a state where it has been lowered to the extent. In this case, the die base (8) that moves up and down is also the die body (6a), as described above.
The lip (64c) of the die (6) is positioned at a predetermined height, and the moving base (7) that moves horizontally and the cotter (85) that regulates the advance position position the tip of the lip (64c) of the die (6) on the surface of the metal web (W). Is adjusted with high accuracy to a state separated from the camera by a fixed distance, for example, -5 to 1 mm. Note that the lip (64
c) The state in which the tip is separated from the surface of the metal web (W) by -5 mm refers to the state in which the surface of the metal web (W) is pushed in from the flat state by -5 mm by the lip (64c).

In any of the above-mentioned coating operations, the die body (6a) is moved toward the surface of the metal web (W) conveyed at a constant speed on the backup roll (2) by the lip (64c). And apply the paint at a constant flow rate.

The upstream tension roll (3), the second backup roll (5), and the downstream tension roll (4) are formed by sequentially winding a metal web (W) around them, as shown in FIG. As shown by the dashed line, a pass line for the coating operation by transfer is formed. In the case of a transfer coating operation, the second backup roll (5) is located in a state where the metal web (W) is brought into contact with the backup roll (2). At that time, the downstream tension roll (3) defines the angle of feeding the metal web (W) to the backup roll (2), and the movable second backup roll is a cylinder device (5).
By controlling the operation of 1), the take-up angle of the metal web (W) from the backup roll (2) is defined, and the contact state of the metal web (W) with the backup roll (2) is adjusted.

After the metal web (W) is set in the above state, the die (6) discharges paint from the lip (64c) toward the surface of the backup roll (2), and
The backup roll (2) rotates as a transfer roll, and applies the paint supplied from the die (6) to the surface of the metal web (W).

As described above, since the die coater of the present invention can change the discharge position of the paint on the metal web (W) by the vertically movable die (6), the coating operation by the opposite and the coating operation by the offset are performed. Can be selectively implemented.
Further, since the pass line can be changed using the second backup roll (5) and the backup roll (2) can function as a transfer roll, a coating operation by transfer is also possible. That is, the die coater of the present invention can perform the coating operation by the opposite apparatus, the offset and the transfer by one apparatus, and can perform the metal web (W)
A wide variety of coatings can be carried out according to the type of film and the thickness of the coating film.

In the die coater according to the present invention, the distance between the metal web (W) and the backup roll (2) can be adjusted by the horizontally movable die (6). The coating can be performed with higher quality with respect to the smoothness of the coating. Furthermore, in the case of the coating operation by transfer, since the contact state of the pass line with the backup roll (2) can be adjusted by the movable second backup roll (5), the coating accuracy by transfer can be further improved. .

Further, in the die coater of the present invention, during the coating operation, foreign matter such as dust passing through the seam of the metal web (W) or adhering to the surface of the metal web (W) was caught on the lip (64c). In this case, the above-mentioned horizontal coarse movement mechanism quickly avoids the die (6), and after the seam or the foreign matter passes, the horizontal coarse movement mechanism quickly returns the die (6) to a predetermined coating position, In addition, the horizontal fine movement mechanism accurately sets the distance from the lip (64c) to the surface of the metal web (W). Therefore, the die coater of the present invention does not need to stop the supply line of the metal sheet (W) in the incidental operation such as passing through the connection portion of the metal sheet (W), and can be operated extremely efficiently.

[0046]

As described above, according to the die coater of the present invention, a single apparatus can perform the coating operation by means of opposite, offset and transfer, and can perform various operations in accordance with the type of the metal web and the thickness of the coating film. Coating can be performed across varieties.

[Brief description of the drawings]

FIG. 1 is a side view showing an arrangement of dies and respective rolls in a die coater according to the present invention.

FIG. 2 is a front view showing the structure of the die from the lip side.

[Explanation of symbols]

 1: Frame 12: Linear guide 2: Backup roll 3: Upstream tension roll 4: Downstream tension roll 5: Second backup roll 51: Jack 6: Die 6a: Die body 6b: Support block 63: Manifold 64: Slot 64c: Lip 7: Moving base 72: Linear guide 8: Die base 82: Linear guide 85: Cotter W: Metal web

Claims (4)

[Claims] 1. A die coater for continuously coating a surface of a metal web while transporting the metal web, wherein a slot for discharging the paint is formed in a horizontal direction, and a lip is formed at a front edge thereof to form an opening of the slot. And a backup roll disposed substantially opposite to the lip and supporting the metal web being conveyed from the back, and a die disposed below the backup roll and defining a feeding angle of the metal web to the backup roll. An upstream tension roll, and a downstream tension roll disposed above the backup roll and defining the take-up angle of the metal web from the backup roll, and the die is configured to be able to move up and down, On the side opposite to the die with respect to the backup roll, there is a second line for changing the pass line. A die coater, wherein two backup rolls are arranged, and each coating operation of opposite coating, offset coating, and transfer coating using the backup roll as a transfer roll can be switched. 2. The die coater according to claim 1, wherein the die is configured to be horizontally movable. 3. The horizontal movement mechanism of the die includes a horizontal coarse movement mechanism for moving the die in a range of -100 to 1500 mm from a lip to a vertical tangent to the surface of the backup roll on the die side, and a horizontal coarse movement mechanism. The die coater according to claim 2, further comprising a horizontal fine movement mechanism for moving the die in a range of 0.001 to 5 mm. 4. The die coater according to claim 1, wherein the second backup roll is configured to be movable to bring the changed pass line closer to or away from the backup roll.