JP2524486B2 - Uniform coating type die coater - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a uniform coating type die coater for uniformly applying a coating liquid in the width direction of a belt-shaped material which is continuously conveyed.

[0002]

2. Description of the Related Art Conventionally, as a die coater for uniformly applying a coating liquid in the width direction of a strip-shaped material, a die coater disclosed in JP-A-5-68927 has been generally known. In the die coater, the coating liquid supplied from one end side of the manifold formed inside the die is discharged from the slot portion provided in the width direction of the strip-shaped material and applied to the strip-shaped material.
Further, in the die coater, the pressure inside the manifold is maintained high to increase the pressure loss of the coating liquid discharged from the slot portion. As a result, the pressure inside the manifold becomes uniform, and the coating liquid is uniformly discharged from the entire area of the slot portion.

[0003]

However, in the die coater described above, many prototypes are actually manufactured in order to obtain the optimum shape of the manifold that suits the coating conditions. There was a problem that the manufacturing cost of was increased.

Further, in the above die coater, when the coating amount of the coating liquid is reduced, the pressure inside the manifold becomes lower as the flow rate of the coating liquid decreases, and the pressure loss of the coating liquid discharged from the slot portion becomes smaller. Therefore, there is a problem that the pressure inside the manifold becomes non-uniform, the coating liquid discharged from the slot portion varies in the coating width direction, and the thickness of the coating film becomes non-uniform in the width direction of the strip-shaped material. It was

The shape of the manifold of the die coater is
It is processed according to certain application conditions. Therefore,
Even if the coating amount of the coating liquid is constant, if the coating conditions such as the viscosity, coating speed, coating width of the coating liquid are changed significantly, the pressure inside the manifold in the coating width direction will change due to the non-Newtonian mechanical characteristics of the fluid. It becomes uneven. Therefore, it is necessary to replace the die coater with a die coater having a manifold suitable for the coating conditions. Further, this not only causes a reduction in the efficiency of the coating work, but also requires the management of many types of die coaters.

On the other hand, a coating liquid supply port is provided in the central portion of the manifold, and the coating liquid is supplied to the coating liquid supply port to reduce the pressure difference inside the manifold in the coating width direction to reduce the pressure difference in the coating width direction. Although there is a die coater that makes the discharge amount uniform, the coating liquid is not always uniformly discharged in the coating width direction when the coating width is long or the viscosity of the coating liquid is high. Furthermore, if the coating liquid supply port is provided at the center of the manifold, there is a problem that the die coater main body is processed and the piping for supplying the coating liquid becomes complicated.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a uniform coating die coater according to claim 1 is a manifold for supplying a coating liquid formed inside a die. In a die coater having a slot for discharging a coating liquid connected to the manifold, an opening of a communicating portion having a plurality of coating liquid discharging holes provided at predetermined intervals in the coating width direction and formed between the discharging holes. It is characterized in that a coating liquid supply pipe in which a plurality of rings whose area can be varied is slidably fitted is inserted into the manifold, and the coating liquid supply means is connected to one end of the pipe.

The uniform coating type die coater according to claim 2 is a die coater having a manifold for supplying a coating liquid formed inside a die and a slot portion for discharging a coating liquid connected to the manifold, wherein the coating width direction is predetermined. An opening area of a communication portion formed between an inner pipe having a plurality of first coating liquid ejection holes provided at intervals and rotatably fitted on the pipe and the first coating liquid ejection hole can be made variable. An outer pipe having a plurality of second coating liquid discharge holes is loaded into the manifold, and a coating liquid supply means is connected to one end of the inner pipe.

[0009]

According to the uniform coating type die coater of claim 1, the plurality of rings are respectively moved to the outside of the plurality of discharge holes provided in the coating liquid supply pipe so that the coating liquid is uniformly discharged in the width direction of the slot portion. First, the opening area of the communication portion formed between the discharge hole and the ring is adjusted. Therefore, the coating liquid supplied from the coating liquid supply means to the cylindrical body flows out into the manifold through the plurality of discharge holes whose opening area is adjusted, passes through the slot portion from the manifold, and is uniformly applied in the coating width direction. It is discharged to form a coating film having a uniform thickness in the width direction of the strip-shaped material.

Further, in the uniform coating type die coater according to the second aspect, the outer pipe is rotated and the first coating liquid discharge hole and the second coating liquid are discharged so that the coating liquid is uniformly discharged in the width direction of the slot portion. The opening area where the liquid discharge holes communicate is adjusted. The coating liquid supplied to the cylindrical body from the coating liquid supply means flows out into the manifold through the plurality of first coating liquid discharge holes whose opening area is adjusted, passes through the slot portion from the manifold, and is applied in the coating width direction. Discharge uniformly to form a coating film having a uniform thickness in the width direction of the band-shaped material.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show a first embodiment of a uniform coating type die coater 1 according to the present invention. The uniform coating die coater 1 includes an upper metal piece 2, a lower metal piece 3 and a coating liquid supply pipe 4.

On the contact surface 5 of the upper metal piece 2 and the lower metal piece 3, a manifold 6 is formed in a cylindrical shape along the coating width direction. Further, on the contact surface 5 from the manifold 6 to the tip lip portion 7, a slot portion 8 is formed by cutting the upper metal piece 2 and the lower metal piece 3.

The coating liquid supply pipe 4 is provided with a plurality of coating liquid discharge holes 9 in the axial direction. In addition, the coating liquid discharge hole 9
A plurality of rings 10 for adjusting the opening area of the above are slidably fitted on the coating liquid supply pipe 4.

In the uniform coating die coater 1, a seal member 14 and a side plate 15 are provided on one side portion 13 of a main body 11 in which an upper metal member 2 and a lower metal member 3 are integrated, and end portions of a manifold 6 and a slot portion 8. Is blocking. Then, the coating liquid supply pipe 4 is inserted into the manifold 6 from the other end portion of the manifold 6, and the end portion 16 of the coating liquid supply pipe 4 is housed and fixed in the recess 17 of the side plate 15. On this occasion,
The coating liquid discharge hole 9 is inserted so as to be located on the opposite side of the portion where the slot portion 8 and the manifold 6 are connected.

Further, on the other side portion 18 of the main body 11,
The seal member 19 and the side plate 20 are provided, and the manifold 6 is provided.
The other end of the slot 8 is closed. The other end 21 of the coating liquid supply pipe 4 passes through the opening 22 of the seal member 19 and the opening 23 of the side plate 20 to protrude outside the main body 11, and is connected to the coating liquid supply device 24.

In the uniform coating type die coater 1 having the above-mentioned structure, the tip lip portion 7 is arranged so as to face the strip-shaped material 26 conveyed in the arrow x direction by the backup roll 25 at a predetermined interval. When the coating liquid is supplied from the coating liquid supply device 24 to the coating liquid supply pipe 4, the coating liquid flows into the manifold 6 from the plurality of coating liquid discharge holes 9. At this time, as described above, since the coating liquid discharge hole 9 is located on the opposite side of the portion where the slot portion 8 and the manifold 6 are connected, the coating liquid directly flows out from the coating liquid discharge hole 9 to the slot portion 8. There is nothing to do.

The opening area of the coating liquid discharge hole 9 is adjusted by moving the ring 10 in the axial direction of the coating liquid supply pipe 4 and superimposing the coating liquid discharge hole 9 and the ring 10. For example, when the coating liquid has a high viscosity, the opening area of the coating liquid discharge hole 9 is adjusted so as to increase as it approaches the end 16 of the coating liquid supply pipe 4.

The coating liquid flowing out into the manifold 6 flows along the inner circumference of the manifold 6 beyond the coating liquid supply pipe 4 toward the slot portion 8 side, and from the slot portion 8 via the tip lip portion 7. , Is uniformly discharged in the coating width direction. Therefore, a coating film having a uniform thickness is formed in the width direction of the strip-shaped material 26.

Thus, the uniform coating type die coater 1 described above
Then, as described above, the coating liquid is uniformly discharged in the coating width direction from the slot portion 8 by adjusting the opening area of the coating liquid discharge hole 9 of the coating liquid supply pipe 4 loaded in the manifold 6. You can Further, since the coating liquid may be supplied from one end side of the manifold 6, the piping can be simplified. Further, since it is not necessary to provide a coating liquid supply port or the like communicating with the manifold 6 at the center of the upper part of the upper metal product 2, the man-hours for processing the upper metal product 2 can be omitted, so that the cost of the uniform coating die coater 1 can be reduced.

Further, when the coating conditions such as the coating liquid, the coating width, the coating speed, etc. are changed, the coating liquid discharge holes 9 are formed so that the coating liquid is uniformly discharged from the slot portion 8 in the coating width direction. Adjust the opening area. When adjusting the opening area of the coating liquid discharge hole 9, the seal member 19 and the side plate 20 are removed from the side portion 18 of the main body 11, the coating liquid supply pipe 4 is pulled out from the manifold 6, and then the coating liquid supply pipe 4 is attached to the outside. The position of the fitted ring 10 is changed to adjust the opening area of each coating liquid discharge hole 9.

Next, a second embodiment according to the present invention will be described. 4 and 5 show a uniform coating die coater 30. The uniform coating die coater 30 has an inner pipe 32 and an outer pipe 33 rotatably fitted on the inner pipe 32, instead of the coating liquid supply pipe 4 and the ring 10 which constitute the uniform coating die coater 1. Composed. Further, in the uniform coating type die coater 30, the same members and the same parts as those in the uniform coating type die coater 1 are designated by the same reference numerals, and the description thereof will be omitted.

An inner pipe 32 is inserted in the manifold 6 of the uniform coating die coater 30. The end portion 33 of the inner pipe 32 is closed and is inserted up to the vicinity of the side portion 13 of the main body 11. The other end 34 is
It passes through the opening 22 of the seal member 19 and the opening 23 of the side plate 20, protrudes outside the main body 11, and is connected to the coating liquid supply device 24. The inner pipe 32 is provided with a plurality of first coating liquid discharge holes 35 at equal intervals in the axial direction.
The first coating liquid discharge hole 35 is provided on the opposite side of the portion where the slot portion 8 and the manifold 6 are connected.

The outer pipe 33 is rotatably fitted on the inner pipe 32 as described above. One end 36 of the outer pipe 32 is externally fitted to the vicinity of one side 18 of the main body 11, and the other end 37 is provided with the opening 38 of the seal member 14 provided on the side 13 and the side plate. 1
5 passes through the opening 39 and projects to the outside of the main body 11. Further, a shaft seal 40 is provided in the opening 39,
The outer pipe 33 is designed so that the seal can be rotated.
Further, a rotary lever 41 is connected to the other end portion 37, and the outer pipe 32 is provided so as to be rotated by the rotary lever 41.

The outer pipe 33 is provided with second coating liquid discharge holes 42 having the same area as the first coating liquid discharge holes 35 of the inner pipe 32 and at the same intervals in the coating width direction. Further, the second coating liquid discharge holes 42 are provided so as to be slightly shifted in the circumferential direction of the outer pipe 33 from the side portion 18 side to the side portion 13 side. Finally, as shown in the drawing, the second coating liquid discharge hole 42a on the side 18 side and the side 1
It is configured such that it is displaced by e between the second coating liquid discharge holes 42b on the third side. Therefore, for example, the second coating liquid discharge hole 42
When a and the first coating liquid ejection hole 35 of the inner pipe 32 are overlapped so as not to be displaced, the second coating liquid ejection hole 42b and the first coating liquid ejection hole 35 are shifted by e in the circumferential direction and overlap each other. It has become.

In the uniform coating type die coater 30 having the above-mentioned structure, the tip lip portion 7 is arranged so as to face the strip-shaped material 26 conveyed in the arrow x direction by the backup roll 25 at a predetermined interval. When the coating liquid is supplied from the coating liquid supply device 24 to the inner pipe 32, the coating liquid is supplied to the plurality of first pipes.
Coating liquid discharge hole 35 and second coating liquid discharge hole 4 of outer pipe 33
The two flow out into the manifold 6 from the communication portion 45 in which the two overlap and communicate with each other.

At this time, since the first coating liquid discharge hole 35 is located on the opposite side of the portion where the slot portion 8 and the manifold 6 are connected to each other, as described above, the coating liquid is applied from the communicating portion 45 to the slot portion 8. Will not be leaked directly.

The communicating portion 45 is adjusted by rotating the outer pipe 33 with the rotating lever 41 and changing the overlapping area of the first coating liquid discharge hole 35 and the second coating liquid discharge hole 42. For example, if the coating liquid has a high viscosity,
The communication portion 45 is adjusted so as to become larger toward the second coating liquid ejection hole 42b side.

The coating liquid flowing out of the communicating portion 45 into the manifold 6 goes around the inner pipe of the manifold 6 over the outer pipe 33 to the side of the slot portion 8 and flows from the slot portion 8 to the tip lip portion 7. Is uniformly discharged in the coating width direction. Therefore, a coating film having a uniform thickness is formed in the width direction of the strip-shaped material 26.

Thus, the uniform coating type die coater 3 is used.
When 0, the area of the communicating portion 45 that discharges the coating liquid to the manifold 6 can be adjusted in the coating width direction. Therefore, the coating liquid can be uniformly discharged from the slot portion 8 in the coating width direction, so that the thickness of the coating film becomes uniform in the coating width direction.
Further, since the coating liquid may be supplied from one end side of the manifold 6, the piping can be simplified. Further, since it is not necessary to provide a coating liquid supply port or the like communicating with the manifold 6 at the center of the upper part of the upper metal member 2, the cost of the uniform coating die coater 1 can be reduced.

When changing coating conditions such as coating liquid,
The area of the communicating portion 45 is adjusted so that the coating liquid is uniformly discharged from the slot portion 8 in the coating width direction. When the area of the communication portion 45 is adjusted, the outer pipe 33 is rotated by the rotating lever 41 as described above.
No disassembly work is required to remove 5. Further, the area of the communicating portion 45 can be adjusted while observing the discharge state of the coating liquid and the thickness of the coating film. In the above uniform coating type die coater 30, the first coating liquid discharge holes 35 provided in the inner pipe 32 may be provided so as to be displaced in the circumferential direction, or the rotary lever 41 may be connected to the inner pipe 32 to provide the inner pipe 32. May be provided so as to rotate.

Further, as shown in FIG. 6, the outer pipe 3
3 may be provided with coating liquid discharge holes 46 to 48 (FIG. 6C). Each of the coating liquid discharge holes 46 to 48 is composed of a plurality of holes, and the holes are provided in three rows on the outer circumference of the outer pipe 33 in the axial direction. Further, the coating liquid discharge holes 46 to 48 are
The first coating liquid discharge hole 35 of the inner pipe 32 (see FIGS. 6A and 6A).
The holes are provided at the same intervals as in B) and gradually increase toward the side portion 13 side at different rates of change (FIG. 6D). Further, comparing the coating liquid discharge holes 46 to 48 provided on the same circumference of the outer pipe 33, the coating liquid discharge holes 46, 47, and 48 are provided such that the hole diameters become larger in this order.

Therefore, depending on the coating state of the coating liquid and the like,
Since it is possible to select one of the coating liquid discharge holes 46 to 48 that meets the coating conditions, it is possible to finely adjust the coating liquid discharged from the slot portion 8 in the coating width direction. It should be noted that the coating liquid discharge holes 46 to 48 are not limited to those provided in three rows in the axial direction as described above, and can be provided in any number of rows.

The uniform coating die coaters 1 and 30
The manifold 6 is provided on the upper metal piece 2 and the lower metal piece 3. However, as shown in FIG. 7, the manifold 6 is provided on the upper metal piece 2 and a plurality of communicating portions communicating from the manifold 6 to the slot portion 8 are provided. The structure may be such that the hole 49 is provided. Needless to say, the manifold 6 may be provided in the lower metal member 3, and the communication hole 49 may have a slot shape. Further, as shown in FIG. 8, the manifold 6 may be provided on the upper metal member 2 and opened to the contact surface 5 of the upper metal member 2 and the lower metal member 3.

[0034]

As is apparent from the above description, in the uniform coating type die coater according to the first aspect, the positions of the rings are changed by sliding a plurality of rings in the axial direction to change the position of the coating liquid supply pipe. The opening area of the communication portion can be adjusted. Further, in the uniform coating die coater according to the second aspect, the outer pipe can be rotated to adjust the opening area where the second coating liquid discharge hole and the first coating liquid discharge hole communicate with each other.

Therefore, in the uniform coating type die coater according to the first and second aspects, the viscosity of the coating liquid, the coating speed,
Regardless of the coating conditions such as the coating width, the amount of the coating liquid discharged from the discharge holes of the coating liquid supply pipe can be adjusted to uniformly discharge the coating liquid over the entire width direction of the slot portion. Therefore, the coating film thickness of the strip-shaped material in the width direction can always be made uniform.

Further, in the die coater according to the first or second aspect, as described above, the thickness of the coating film in the width direction of the strip-shaped material can be always made uniform, so that the shape of the manifold is changed by changing the coating conditions. You don't have to. That is,
Since there is no need to replace the die coater, work efficiency is dramatically improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a uniform coating type die coater according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view of a uniform coating die coater of a second embodiment according to the present invention.

5 is a sectional view taken along line IV-IV in FIG.

FIG. 6 is an explanatory diagram of a coating liquid discharge hole of an outer pipe.

FIG. 7 is a cross-sectional view of a uniform coating type die coater in which a manifold is provided on an upper metal member.

FIG. 8 is a sectional view of a uniform coating type die coater in which a manifold is provided on an upper metal product.

[Explanation of symbols]

1 ... Uniform coating type die coater, 2 ... Upper metal item, 3 ... Lower metal item,
4 ... Coating liquid supply pipe, 9 ... Coating liquid discharge hole, 10 ... Ring.

Claims (2)

(57) [Claims] 1. A die coater having a manifold for supplying a coating liquid formed inside a mold and a slot portion for discharging a coating liquid connected to the manifold, wherein a plurality of coating liquids provided at predetermined intervals in the coating width direction. A coating liquid supply pipe having a hole and a plurality of rings capable of varying the opening area of a communication portion formed with the discharge hole is slidably fitted on the manifold, and the coating liquid is supplied. A uniform coating die coater characterized in that the means is connected to one end of the pipe. 2. A die coater having a manifold for supplying a coating liquid formed inside a mold and a slot portion for discharging a coating liquid connected to the manifold, wherein a plurality of first coatings provided at predetermined intervals in a coating width direction. A plurality of second coating liquid discharge holes capable of varying an opening area of a communication portion formed between the inner pipe having the liquid discharge holes and the pipe to be rotatably fitted on the pipe and the first coating liquid discharge hole; A uniform coating die coater characterized in that an outer pipe having the same is charged into the manifold, and a coating liquid supply means is connected to one end of the inner pipe.