JPH0672668U - Die coater cleaning device - Google Patents

Abstract

(57) [Summary] [Structure] The rotating shaft 11 is concentric with the inside of the manifold 5.
The wire 14 spirally arranged along the inner peripheral surface of the manifold 5 is fixed to the rotating shaft 11 so that the paddle 13 provided on the rotating shaft 11 is contacted with the cleaning liquid W, W ′. As a result of the wire 14 moving along the inner peripheral surface of the manifold 5, the cleaning liquid W,
W'is agitated and the manifold 5 is efficiently cleaned.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cleaning device for washing away coating liquid remaining inside a die coater.

[0002]

[Prior art]

 Conventionally, there is known a die coater in which a coating liquid is supplied to a manifold formed inside a die, and the coating liquid is discharged from a slot portion communicating with the manifold to apply the coating liquid to a strip or the like to be coated.

[0003]

[Problems to be solved by the device]

 However, in the above die coater, when changing the type of coating liquid, the die is disassembled to clean the manifold and the slot portion, so that there is a problem that a lot of labor is required for the cleaning work. There is also known a method in which a cleaning liquid is supplied from the coating liquid supply part of the manifold to the manifold and the slot part for cleaning, but the coating liquid adhering to the inner surface of the manifold, particularly the bottom part, remains. However, if the coating solution is removed, the cleaning time becomes long and a large amount of cleaning solution is required.

[0004]

[Means for Solving the Problems]

 The present invention has been made in order to solve the above-mentioned problems, and in the die coater cleaning device, the cleaning liquid is supplied to the manifold to wash away the coating liquid remaining in the manifold and the slot for discharging the coating liquid. A rotating shaft provided concentrically with the manifold, a wire spirally arranged along the inner peripheral surface of the manifold and fixed to the rotating shaft, and a driving means for rotating the rotating shaft. It is provided. Further, the drive means is composed of a paddle fixed to the rotary shaft and a cleaning liquid corresponding to the paddle.

[0005]

In the above-mentioned die coater cleaning device, when the rotating shaft is rotated by the driving means while supplying the cleaning liquid to the manifold, the wire moving along the inner peripheral surface of the manifold causes the wire to remain particularly on the bottom of the manifold. The coating liquid and the cleaning liquid are agitated, and the coating liquid in this manifold is washed away. Further, the rotating force is applied by the cleaning liquid that hits the paddle provided on the rotating shaft as the driving means.

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4, the die body 2 of the die coater 1 is composed of an upper die 3 and a lower die 4, and a circular cross section extending in the longitudinal direction is formed at the boundary between the upper die 3 and the lower die 4. And a slot portion 7 which is a coating liquid discharge nozzle communicating from the front end face 6 to the manifold 5 is formed, and both end portions of the manifold 5 and the slot portion 7 are closed by the side walls 8 and 8. Has been. A coating liquid supply hole 9 is provided at the center of the upper die 3 for supplying the coating liquid and discharging the cleaning liquid, and cleaning liquid supply holes 10 and 10 are formed at both ends of the lower die 4, respectively. The central coating liquid supply hole 9 may be provided in the lower die 4, and the cleaning liquid supply holes 10, 10 at both ends may be provided in the upper die 3.

A rotary shaft 11 is arranged concentrically with the manifold 5, and the rotary shaft 11 is provided on both ends of the manifold 5 and inside the cleaning liquid supply holes 10 and 10 in a substantially cross shape. The bearings 12 and 12 (see FIG. 5) are rotatably supported. Paddles 13, 13 are fixed to both ends of the rotary shaft 11, respectively, and these paddles 13, 13 are opposed to the cleaning liquid supply holes 10, 10 of the lower die 4, respectively. Further, between the bearings 12, 12, a wire 14 is spirally arranged along the inner peripheral surface of the manifold 5, and both ends of the wire 14 are fixed to the rotating shaft 11 (see FIG. 6). ). The wire 14 may be in light contact with the inner peripheral surface of the manifold 5, or may be in non-contact with a minute interval.

As shown in the piping system diagram of FIG. 7, the die coater 1 has a central coating liquid supply hole 9 connected to a coating liquid supply source 16 via a valve 15 and a circulation liquid via a valve 17. Is connected to the cleaning liquid tank T1. The cleaning liquid supply holes 10, 10 at both ends are both connected to the cleaning liquid tank T2 via a valve 18, a liquid feed pump 19, and a valve 20, and a valve 21 is provided between the liquid feed pump 19 and the valve 20 on the upstream side thereof. The cleaning liquid tank T1 is connected via the, and the compressed air supply source 23 is connected to the downstream side of the liquid feed pump 19 via the valve 22. A cleaning liquid recovery container 24 is arranged below the die coater 1, and the cleaning liquid storage container 24 is connected to a cleaning liquid tank T1 for circulation.

In the die coater 1 arranged as described above, when the coating liquid is applied to the strip, only the valve 15 is opened, and the coating liquid is supplied from the coating liquid supply source 16 to the manifold 5 through the central coating liquid supply hole 9. Supply the liquid. The coating liquid supplied to the manifold 5 is distributed to both end sides, is discharged from the slot portion 7, and is applied to the strip S moving at a position slightly apart from the front end face 6 as shown in FIG.

The cleaning process of the die coater 1 is performed in two steps, a rough cleaning step and a finish cleaning step. During the cleaning process, the valve 15 for supplying the coating liquid is kept closed.

In the rough cleaning step, the cleaning liquid W ′ stored in the circulating cleaning liquid tank T 1 is supplied via the valve 21 based on the drive of the liquid supply pump 19, and passes through the valve 18 and the cleaning liquid supply holes at both ends. Discharge to the manifold 5 from 10, 10. Further, a rotational force is applied to the paddle 13 by the discharge pressure of the cleaning liquid W ', and the rotary shaft 11 and the wire 14 rotate together with the paddle 13.

The supplied cleaning liquid W ′ flows through the manifold 5 and the slot portion 7, and the coating liquid remaining in the manifold 5 and the slot portion 7 is washed away. Moreover, the cleaning liquid W ′ in the manifold 5 is agitated by the rotation of the wire 14, and the inner peripheral surface of the manifold 5 is effectively cleaned. In particular, when the wire 14 remains on the bottom of the manifold 5, the coating liquid remaining on the bottom of the manifold 5 is scraped off, and the cleaning effect is further increased. Then, the cleaning liquid flowing out from the slot portion 7 is collected in the cleaning liquid recovery container 24 and supplied to the circulating cleaning liquid tank T1. Further, the cleaning liquid W ′ flowing through the manifold 5 is directly sent back to the cleaning liquid tank T1 via the coating liquid supply hole 9 and the valve 17. However, since the cleaning liquid W'used in this rough cleaning step has a high degree of contamination of the coating liquid, it is sent to the not-shown cleaning liquid tank by opening the discharge valve 25 of the cleaning liquid tank T1.

When the rough cleaning for a predetermined time is completed, the supply of the cleaning liquid W ′ is stopped, the valve 22 is opened, the compressed air is supplied from the compressed air supply source 23, and the cleaning liquid supply holes 10 at both ends reach the manifold 5. The jetting is performed to purge the cleaning liquid W ′ and the coating liquid remaining in the manifold 5 and the slot portion 7. At least one of the upper die 3 and the lower die 4 is provided with a window through which the inside of at least one of the manifold 5 and the slot portion 7 can be seen, and the cleaning state is observed from this window. The washing time may be appropriately determined.

In the finish cleaning process, the valve 20 is opened to supply the cleaning liquid W from the cleaning liquid tank T2 to the manifold 5, the manifold 5 and the slot portion 7 are cleaned, and the manifold 14 is operated by the stirring action based on the rotation of the wire 14. Clean the inner surface of 5. Further, the cleaning liquid W after cleaning is collected in the cleaning liquid tank T1 as in the rough cleaning process, and is used in the next rough cleaning process.

In the above embodiment, the rotating shaft 11 is supported by the bearings 12 and 12 housed in the manifold 5, but these bearings 12 and 12 may be provided on the side walls.

The rotating shaft 11 is rotated by applying the cleaning liquids W ′ and W to the paddle 13 fixed to the rotating shaft 11, but the rotating shaft 11 is projected from the side wall and the protruding portion is manually or mechanically operated by a motor or the like. The rotation may be transmitted by a mechanical means.

Further, the cleaning liquids W ′ and W are applied to the paddle 13 to apply rotation, but compressed air is applied to the paddle 13 from the compressed air supply source 23 to rotate the rotary shaft 11. Good. However, in this case, it is preferable to separately provide a compressed air supply hole in the die coater 1 and to provide a paddle facing the compressed air supply hole.

Furthermore, the rotary shaft 11 may be projected from the side wall 8 and a paddle may be provided on the projection, and the cleaning liquid or compressed air may be applied to the paddle.

The rotary shaft 11 does not have to exist over the entire length of the manifold 5, and a wire spirally arranged along the inner peripheral surface of the manifold 5 is rotatably supported concentrically with the manifold. Any size, number, shape, etc. may be used as long as they are used.

Further, it goes without saying that the configurations of the piping system and the cleaning liquid tank system, which are the cleaning liquid supply means for supplying the cleaning liquids W and W ′ to the manifold 5, are not limited to those in the above embodiment.

[0021]

[Effect of device]

 As is clear from the above description, in the die coater cleaning device according to the present invention, the spirally arranged wire is rotated along the inner peripheral surface of the manifold to stir the cleaning liquid in the manifold. The manifold can be cleaned efficiently. Therefore, the cleaning time can be shortened and the amount of cleaning liquid used can be reduced. Further, if a fluid, that is, a cleaning liquid or compressed air is applied to the paddle provided on the rotary shaft to rotate the wire, a separate mechanical drive means is not required and the configuration and control are simplified.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along a horizontal plane of a die coater.

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

FIG. 3 is a partially enlarged view of FIG.

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

5 is a sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a cleaning piping system diagram of the die coater.

[Explanation of symbols]

1 ... Die coater, 5 ... Manifold, 7 ... Slot part,
9 ... Coating liquid supply hole, 10, 10 ... Cleaning liquid supply hole, 11 ... Rotating shaft, 12 ... Bearing, 13 ... Paddle, 14 ... Wire, 16
... Coating liquid supply source, T1, T2 ... Cleaning liquid tank, S ... Strip (body to be coated).

Claims (2)

[Scope of utility model registration request] 1. A die coater for discharging a coating liquid supplied to a manifold from a slot portion to apply the coating liquid to an object to be coated. A rotary shaft concentrically provided in the manifold and an inner peripheral surface of the manifold. And a wire fixed to the rotating shaft and a drive unit for rotating the rotating shaft. 2. The cleaning device for a die coater according to claim 1, wherein the driving means is composed of a paddle fixed to the rotary shaft and a fluid that abuts on the paddle.