JP2501080B2 - 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 die coater, and more particularly to a die coater improved so that the coating width can be easily changed without disassembling the die.

[0002]

2. Description of the Related Art Conventionally, a die coater has been used as a coating device for a traveling sheet surface. The die coater is a coating apparatus provided with a die in which a manifold and a slit extending from the manifold are formed by upper and lower molds, and deckles are arranged in a liquid-tight state on the left and right sides of the slit, respectively. The deckle seals the slit, and when moving the slit to a predetermined position to change the coating width, it was necessary to remove the die from the die coater and disassemble the die.

Further, since the die coater has a large number of assembly bolts, it takes a long time to remove and disassemble and assemble the die associated with these operations, and it is necessary to secure straightness after the die assembly. Since it takes a lot of time and effort and the working environment is bad, it put a considerable burden on the worker. In order to solve such a problem, the present applicant has a method of changing the coating width without disassembling the die first, by providing inner deckle shafts on both sides in the manifold, and by using the deckle and the deckle guide on the inner deckle shaft. A die coater having a fixed coating is proposed, and a method of changing the coating width by driving the inner deckle shaft is proposed (Japanese Patent Application No. 4-288816,
Japanese Patent Application No. 4-305573).

[0004]

However, the above-mentioned device has the following problems. First of all, it is difficult to fix the deckle and deckle guide, and it takes a lot of time and skill to set them.
Further, even if the setting is successful, there is a problem that the deckle and the deckle guide are easily loosened during repeated width changing operations.

[0005]

Means for Solving the Problems As a result of intensive studies made by the present inventors in view of the above problems, the deckle setting is performed by arranging deckle guides in front of and behind the deckle and sandwiching the deckle with the front and rear deckle guides. Therefore, the present invention has been completed, and it has been found that a highly reliable operation can be realized even if the width changing operation is repeated.

That is, the above-mentioned problem is, in a die coater provided with a die in which a manifold and a slit extending from the manifold are formed by upper and lower molds, and a deckle is arranged in a liquid-tight state in the slit, in the manifold, a portion near the tip is provided. A liquid-tight inner deckle shaft that is movable in the liquid-tight state is provided, and the deckle and deckle guides arranged before and after the deckle are fixed to the inner deckle shaft, and the inner deckle shaft is liquid-tight. It is solved by a die coater characterized in that a deckle is connected to the state part.

[0007]

In the die coater of the present invention, the deckle fixed to the inner deckle shaft and the deckle guides arranged before and after the deckle are integrally moved by moving the inner deckle shaft in the liquid-tight state by the drive mechanism. The width can be changed without breaking the liquid tight state. Further, in the present invention, the deckle guide is arranged before and after the deckle,
Since the deckle is firmly fixed, it is difficult for the deckle to fall off even if it is repeatedly operated.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partial explanatory view (perspective view) showing an example of a die coater. 2 to 6 are partial explanatory views (plan views) showing an example of the inner deckle shaft. The die of the die coater of the present invention has basically the same structure as that of a conventional die coater. As shown in FIG. 1, upper and lower molds 1 and 2 form a manifold 3 and a slit 4 extending from the manifold. There is. The slit 4 refers to the entire thin plate-shaped space, and its thickness is 50 to 500 mμ.
It is a degree.

In addition to the above, in the present invention, inner deckle shafts 5 each having a liquid-tight state in the vicinity of the front end portion by a liquid seal structure 6 are arranged on one side or both sides in the manifold, and slits are formed in these inner deckle shafts. The deckle 7 arranged in a liquid-tight state, the front deckle guide 8 and the rear deckle guide 9 are fixedly mounted, and the deckle 7 is sandwiched between the front deckle guide 8 and the rear deckle guide 9.

The inner deckle shaft has a generally circular cross section, and may be a solid body or a hollow body. If the inner deckle shaft is a hollow body, the inside of the shaft is the supply path for the coating liquid (the coating liquid is supplied from the direction of arrow A in FIG. 1).
Can be used as As a method of supplying the coating liquid to the manifold, as described above, in addition to using the inner deckle shaft, a hole communicating with the manifold is provided on the upper or back side of the upper mold 1 (the side opposite to the slit when viewed from the manifold). It is done by

The size of the inner deckle shaft is not liquid-tight with respect to the manifold, but it is necessary to have a liquid-tight structure in a part near the tip. This will be described with reference to FIGS. 2 to 6. The liquid-tight structure has only one place (see FIG.
It may be 6) shown in FIGS. 3 and 5, but a plurality of two places (6 and 6a shown in FIG. 4) and 3 places (6, 6a and 6b shown in FIG. 6) may be provided.

Liquid-tight means the liquid-sealing structures 6, 6a,
In the meaning of 6b, any liquid-tight structure, such as an O-ring or a gland packing, which is often used for the sliding portion in the cylinder can be used. The inner deckle shaft 5 has
The deckle 7 for making the slit 4 liquid-tight and the deckle guides 8 and 9 are fixed before and after the deckle 7. The deckle guides 8 and 9 do not make the slit 4 liquid-tight, but stably fix the deckle 7 from the front and rear. As the material, an ultrathin metal plate such as stainless steel is used. In order to make the fixing even stronger, wedges can be inserted at the connection portion between the deckle 7 and the deckle guides 8 and 9 as illustrated in FIGS. 5 and 6. Furthermore, the deckle may be tapered at the tip of the slit (FIGS. 4 and 6).

The deckle 7 which makes the slit liquid-tight is
Any material may be used as long as it has corrosion resistance against the coating liquid, cleaning liquid, etc. used in the die coater and has elasticity that can maintain the slit gap in a liquid-tight state sufficiently. For example, fluororesin, polyamide resin, polyester resin and the like are preferable materials. Its thickness is 10 to the slit gap.
It is preferable to compress a material having a thickness of 50 μm and tightly sandwich it in the slit to form a liquid-tight state. The width of the deckle in the longitudinal direction is preferably narrow in order to prevent liquid leakage due to uneven contact of the liquid sealing surface and to reduce frictional resistance when changing the coating width, and specifically, 1 to 50 mm is desirable.

The front deckle guide 8 and the rear deckle guide 9 fixed to the inner deckle shaft 5 are for smoothly moving the deckle 7 when the inner deckle shaft 5 is moved in the left-right direction when the coating width is changed. Since it is a support material, the thickness of the support material needs to be thinner than the slit gap so that the slit portion does not become a liquid-tight state and thus does not become a resistance when moving in the left-right direction. For example, 10 to 1 for the slit gap (thickness)
It suffices if the thickness is reduced to 00 μm.

The shape of the front deckle guide 8 is exemplified by a triangle as shown in FIGS. 2, 4, and 5, a trapezoid as shown in FIG. 6, or a rectangle as shown in FIG.
The front deckle guide 8 does not make the inside of the slit liquid-tight, but affects the flow of the coating liquid inside the die. Triangles or trapezoids are preferred for good flow.

Further, the shape of the rear deckle guide 9 may be a triangle as shown in FIGS. 2 and 4 to 6, or a rectangle as shown in FIG. However, when the inner deckle shaft 5 moves in the left-right direction, a considerable force is applied to the joint between the rear deckle guide 9 and the inner deckle shaft 5, and also when the coating liquid adheres, a considerable force is applied. The rear deckle guide 9 preferably has a small area.

With the above structure, the coating width can be easily changed substantially continuously by moving the inner deckle shaft 5 to an arbitrary coating width by a driving device (not shown). One or more liquid-tight structures are provided near the tip of the inner deckle shaft (Figs. 4 and 6).
However, at least one of the liquid-tight portions needs to be connected to the deckle 7. Thus, the movement of the paint in the manifold is regulated, and at the same time, the movement of the paint in the slit is regulated, so that the coating operation can be performed with a desired width. Insufficient connection between the liquid-tight portion and the deckle 7 may cause liquid leakage.

In the present invention, one side of the manifold 3 can be fixed by the side plate, and the inner deckle shaft 5 can be installed only on the other side to change the coating width. In this case, the coating center moves along with the change of the coating width, so it is necessary to appropriately correct the supply position of the material to be coated. It is advantageous that the inner deckle shafts 5 are symmetrically installed on both sides of the manifold 3 and are moved symmetrically in the same manner because the coating width can be changed without changing the coating center.

[0019]

The die coater of the present invention can easily change the coating width without disassembling the die, and its industrial value is remarkable. In particular, by providing inner deckle shafts symmetrically on both sides of the manifold, the coating width can be arbitrarily adjusted without changing the center position of the coating width.

[Brief description of drawings]

FIG. 1 is a partial explanatory view (perspective view) showing an example of a die coater.
Is.

FIG. 2 is a partial explanatory view (plan view) showing an example of an inner deckle shaft of a die coater.

FIG. 3 is a partial explanatory view (plan view) showing an example of an inner deckle shaft of a die coater.

FIG. 4 is a partial explanatory view (plan view) showing an example of an inner deckle shaft of a die coater.

FIG. 5 is a partial explanatory view (plan view) showing an example of an inner deckle shaft of a die coater.

FIG. 6 is a partial explanatory view (plan view) showing an example of an inner deckle shaft of a die coater.

[Explanation of symbols]

1: Upper mold 2: Lower mold 3: Manifold 4: Slit 5: Inner deckle shaft 5a: Inner deckle shaft tip 6,6a, 6b: Inner deckle shaft liquid seal structure 7: Deckel 8: Front deckle guide 9: Rear deckle guide

Claims (5)

(57) [Claims] 1. A die coater comprising a die in which a manifold and a slit extending from the manifold are formed by upper and lower molds, and a deckle is disposed in the slit in a liquid-tight state. An inner deckle shaft that is movable in a liquid-tight state is provided, and a deckle and deckle guides arranged before and after the deckle are fixed to the inner deckle shaft. Die coater with a deckle connected. 2. The die coater according to claim 1, wherein inner deckle shafts are symmetrically arranged on both sides of the manifold. 3. The die coater according to claim 1, wherein the deckle guide has a triangular planar shape. 4. The die coater according to claim 1, wherein the deckle has a small taper shape at the tip of the slit. 5. The die coater according to claim 1, wherein a plurality of liquid-tight portions are formed near the tip of the inner deckle shaft.