JP2002066420A - Slot die head for easy product change - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In slot die coating, when switching the type of coating, the cleaning of the inside and the change of the coating width are changed.
The purpose is to provide an easy slot die head. A slot die head includes a coating solution supply block having a slit communicating with a manifold, and upper and lower lip blocks forming a slit communicating with the slit.
And two application width adjusting side shim plates 70a and 70b tightly fitted on both sides of the slit portion.
A moving / swinging mechanism 102 for moving and swinging the plate in the coating width direction, a holding / pressing mechanism for holding the side shim plate and pressing in the coating thickness direction, and coating for supplying a coating liquid from behind the lip block A slot die head 100 having a liquid supply mechanism and easy to switch types.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slot die head constituting a die coater for coating a continuously moving web-like or sheet-like substrate, and more particularly to a coating method for changing the type of an object to be coated. The present invention relates to a slot die head that is easy to change the type and that can easily change the width and clean the inside.

[0002]

2. Description of the Related Art Conventionally, there has been known a slot die coating method for stably applying a coating solution to a continuously moving web-shaped or sheet-like substrate to be coated. As shown in the perspective view of FIG.
A shim plate (30) obtained by cutting a metal plate or a synthetic resin plate having a thickness substantially equal to the application thickness into a U-shape is placed between the upper lip block (40) and the lower lip block (50). It is performed by pinching. At this time, the width (W) of the opening of the U-shape becomes the application width. In this method, the number of shim plates according to the type of the application width is required, so that each time the type is switched, the slot die head (100) is used. ), Disassembling and removing the side plates (20a, 20b) on both sides, cleaning the inside and the shim plate (30), replacing the shim plate, and the like. was there.

In order to solve the above problem, for example, as disclosed in Japanese Patent Application Laid-Open No. Hei 6-47331, there is a device for moving a unit for changing the coating width called a deckle inside a die head. It has a function of performing washing by swinging the deckle.

However, in the Dickel system,
Since the part that regulates the coating width of the deckle must be able to move inside the die head, a gap is required for the surface where the die head body is sandwiched, so a coating liquid with a high viscosity that does not allow the coating liquid to enter this gap And it is difficult to use a low-viscosity coating solution. In other words, with a low-viscosity coating solution, the coating solution wraps around the gap, and when it solidifies, malfunctions occur in the Dickel unit, etc. It's a problem that gets lost.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and an object of the present invention is to provide a method for coating a continuously moving web or sheet-shaped substrate. In slot die coating, where the liquid is applied stably, when changing the type of product to be applied, cleaning in the slot and changing the application width require disassembling the die head part and cleaning and replacing the shim plate as in the past. There is no decrease in productivity, there is no gap between the die head body and the deckle as in the deckle method, and even low-viscosity coating solutions can be used, and the coating solution spreads evenly in the slots. It is an object of the present invention to provide a slot die head which is easy to change the type of the die.

[0006]

In order to achieve the above object, according to the present invention, in the present invention, a gap between the manifold and a coating liquid supply block having a slit hole communicating with the manifold is defined as follows. In a slot die head comprising upper and lower lip blocks forming a slit portion communicating with a slit hole, two application width adjusting side shim plates tightly fitted to both sides of the slit portion; A moving / swinging mechanism for moving and / or swinging the shim plate in the coating width direction, a holding / pressing mechanism for holding the side shim plate with upper and lower lip blocks for holding the side shim plate and pressing in the coating thickness direction; And a coating liquid supply mechanism for supplying a coating liquid through a manifold from behind the lip block. It is obtained by an easy slot die head on e.

According to the first aspect of the present invention, when the type of product to be applied is switched, the inside of the slit portion and the like are washed by loosening the holding / pressing mechanism of the upper and lower lip blocks, allowing the washing solution to flow from the applying solution supply mechanism, The shim plate movement / swing mechanism allows the plate to oscillate for easy operation.
The plate is moved by the swinging mechanism, and the plate is clamped and fixed by the holding and pressing mechanism of the upper and lower lip blocks at the position of the required application width. A slot die head that can change the application width and can easily switch types is provided. Furthermore, since the slit hole of the coating liquid supply block and the slit portion between the upper and lower lip blocks are directly communicated with each other, a slot die head can be provided which is easy for product switching in which the supplied coating liquid spreads evenly in the slit. .

Further, in the invention according to claim 2, the moving / swinging mechanism for moving and / or swinging the side shim plate includes a shim plate holding block for vertically holding the side shim plate, the shim plate, Two rotating shim plate holding guide rollers and a shim plate holding belt fixed to both sides of the upper and lower lip blocks by winding the tom plate holding block around two rotating shim plate holding guide rollers. 2. The slot die head according to claim 1, wherein the slot die head is moved and swung in the coating width direction while being guided.

According to the second aspect of the present invention, the shim plate holding block and the side shim plates can always be guided by the shim plate holding belt by rotating the two shim plate holding guide rollers movable together with the shim plate holding block. Therefore, it is possible to provide a slot die head capable of smoothly moving and swinging the side shim plate and easily switching types.

[0010] The shim of the shim plate is a stuffing tree (metal), a pinch (metal) or a wedge, and the shim plate referred to here is a pinch plate for adjusting the width of the slit. Say.

[0011]

Embodiments of the present invention will be described below. As shown in FIG. 2, the present invention relates to a slot die head (100) constituting a die coater for applying, for example, a continuously moving web-shaped substrate (5). More particularly, the present invention relates to a slot die head (100) that is easy to change the type of the die and that facilitates changing the application width and cleaning the inside of the head when the type is changed.

Therefore, the slot die head (100) according to the present invention, which is easy to switch types, has a manifold (not shown) and a slit hole (62) communicating with the manifold as shown in an exploded perspective view of FIG. A slot die head (10) comprising a coating liquid supply block (60) having the same and upper and lower lip blocks (40, 50) having a slit portion communicating with the slit hole (62).
0), two application width adjustment side shim plates (70a, 70a,
70b) and the side shim plates (70a, 70b)
Moving / swinging mechanism (102) for moving and / or swinging the sheet in the coating width direction, and the side shim plate (70).
a, 70b), upper and lower lip blocks (40,
50) a holding / pressing mechanism for holding the side shim plates (70a, 70b) and pressing in the coating thickness direction, and a coating liquid supply mechanism for supplying a coating liquid through a manifold from behind the upper and lower lip blocks (40, 50). And a slot die head (100) that is easy to switch types.

Further, in the present invention, as shown in an exploded perspective view of FIG. 1, for example, a moving / swinging mechanism (102) for moving and / or swinging the side shim plate is provided with a side shim plate on both sides vertically. Four shim plate holding blocks (90a, 9b) for fixedly holding (70a, 70b)
0b, 90c, 90d) and two shim plate holding guide rollers (10a, 11a), (10b, 11b) rotating respectively.
(10c, 11c), (10d, 11d) and a shim plate holding belt (80a) wound in an S shape around these shim plate holding guide rollers and fixed to both sides of the upper and lower lip blocks (40, 50). , 80
b, 80c, 80d) to move or swing in the coating width direction.

The slot die head (100) according to the present invention, which is easy to switch types, will be described in more detail with reference to the drawings.

FIGS. 1 and 2 show an exploded view and an overall configuration of an embodiment of a slot die head according to the present invention which is easy to switch types. As shown in FIG. 1, the part as the body of the slot die head (100) includes an upper lip block (40),
Lower lip block (50), coating liquid supply block (6
0) and two side shim plates (7
0a, 70b) are sandwiched from above and below by a total of four shim plate holding blocks (90a, 90b, 90c, 90d) and supported by shim plate holding belts (80a, 80b, 80c, 80d). While the shim plate guide block (12a, 12b)
The coating width is adjusted or moved during cleaning by moving between the and the coating liquid supply block (60). This operation is shown in FIG.
As shown in the figure, the lower slot die head holding base (1
The guide rail, the trapezoidal screw and the motor installed in 30) perform the operation. The guide rail, the trapezoidal screw and the motor can be independently operated by being installed on the left and right.

At this time, each shim plate holding belt (80a, 80b, 80c, 80d) shown in FIG. 1 is pulled toward the outside of the slot die head (100) with a constant tension. The lower slot die head holding base (130) and the upper slot die head holding base (140) shown in FIG. 2 are guided by a precision mold guide post and a guide bush, and are air cylinders (150) for applying a constant pressure in the closing direction. ).

A linear actuator (16) is provided at both ends of the slot die head (100) for widening a minute clearance in the range of 0 to 500 μm during cleaning.
0). This linear actuator (16
0), the upper lip block (40) and the lower lip block (5) due to the left-right difference in pressure distribution sandwiching the application width adjusting side shim plates (70a, 70b) shown in FIG.
It is also possible to finely adjust the left-right difference of the clearance of 0).

For example, as shown in FIG. 2, in the case of a slot die head (100) for coating a coating liquid on a continuously moving web-shaped substrate (5), the type switching of the present invention is performed during cleaning. Easy slot die head (10
The entire unit 0) retracts from the application position near the backup roll (6), rotates the nozzle tip position downward, and discharges the cleaning solvent to the solvent pan (170) as shown in FIG. I have.

Further, although not shown, in the case of a slot die head for coating a coating liquid onto a continuously moving sheet-like workpiece, the entire unit of the slot die head according to the present invention, which is easy to switch the type during cleaning, is applied. It is retracted from the application position on the table, moves above the solvent pan, and discharges the cleaning solvent.

As shown in FIG. 3, for example, there are four systems of cleaning solvents at the time of cleaning.
The double use solvent tank (181) and the double use solvent tank (18)
2) and a solvent tank for disposal (183), a solvent used twice is first poured into the solvent tank for disposal (183), and then a solvent used once is supplied to the solvent tank (182) used twice. ,
Finally, an unused solvent is poured, and the solvent tank is used once (181).
The cleaning is performed by sequentially flowing the cleaning liquid to each of them.

Thus, in the above-mentioned washing, the solvent used twice is first poured into the solvent tank for disposal (183), then the solvent used once is poured into the solvent tank (182) used twice, and finally, The amount of the solvent to be washed can be reduced by flowing the unused solvent and sequentially flowing the solvent to the single-use solvent tank (181).

[0022]

As described above, the present invention has the following effects. That is, in a slot die head including a manifold, a coating liquid supply block having a slit hole communicating with the manifold, and an upper and lower lip block forming a slit portion communicating with the slit hole, both of the slit portion are provided. Two application width adjusting side shim plates that fit tightly on the sides, a movement / oscillation mechanism that moves and / or swings the side shim plates in the application width direction, and holds the side shim plates. An easy-to-change type slot die head including a holding / pressing mechanism for holding a side shim plate between upper and lower lip blocks and pressing in a coating thickness direction, and a coating liquid supply mechanism for supplying a coating liquid through a manifold from behind the lip block. Therefore, when switching the type of product to be applied, the slot die head Removal, demolition, internal cleaning, without requiring replacement of the shim plate,
To clean the inside of the slit, etc., loosen the pinching / pressing mechanism of the upper and lower lip blocks, flow the cleaning liquid from the coating liquid supply mechanism,
The side shim plate movement / swing mechanism can be used to sway the plate to make it sufficiently easy.Change of the coating width is required by moving the plate using the side shim plate movement / swing mechanism. By tightening and fixing the plate with the clamping mechanism and pressing mechanism of the upper and lower lip blocks at the position of the application width that does not leak even with low viscosity coating solution,
The application width can be easily changed, and the slot die head can be easily switched to the type which contributes to the improvement of the production efficiency.

Further, since the slit hole of the coating liquid supply block and the slit portion between the upper and lower lip blocks are in direct communication, the supplied coating liquid spreads evenly in the slit. be able to.

The moving and swinging mechanism for moving and / or swinging the side shim plate includes a shim plate holding block for vertically holding the side shim plate and a rotating two shim plate holding block. A shim plate holding guide roller and a type that is wrapped in an S-shape around the shim plate holding guide roller, and is moved and rocked in the application width direction by a shim plate holding belt fixed to both sides of the upper and lower lip blocks. Since the slot die head is easy to switch, the side shim plate fixed to the shim plate holding block can be smoothly and easily moved and swung by rotating the two shim plate holding guide rollers. It can be a slot die head.

Accordingly, the present invention provides a slot die head which constitutes a die coater for coating a continuously moving web-shaped or sheet-shaped substrate, particularly when changing the type of the object to be coated, changing the coating width or changing the internal width. As a slot die head that is easy to switch types to make cleaning etc. easy,
It has excellent practical effects.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view for describing an embodiment of a slot die head according to the present invention which is easy to switch types.

FIG. 2 is an overall view showing an embodiment of a slot die head according to the present invention, which is easy to switch types, in a side view.

FIG. 3 is a schematic view showing an embodiment when cleaning is performed using a slot die head which is easy to switch types according to the present invention.

FIG. 4 is an exploded perspective view for explaining an example of a conventional slot die head.

[Explanation of symbols]

5 Base material to be coated 6 Backup roll 7 Guide roll 10a, 11a A set of two shim plate guide rollers 10b, 11b {A set of two shim plate guide rollers 10c, 11c} Two sets of shim plate guide rollers 10d, 11d {two sets of shim plate guide rollers 12a, 12b} left and right shim plate guide blocks 20a, 20b {side plate 30 on both sides 30} shim plate 40} {Upper lip block 50} Lower lip block 60} Application supply block 62} Slit hole 70a, 70b {Side shim plate 80a, 80b, 80c, 80d} Shim plate holding belt 90a, 90b, 90c, 90d} ‥ Shim plate holding block 100 ‥‥ Slot die head 02 {moving and swinging mechanism 130} upper slot die holding base 140 {lower slot die holding base 150} air cylinder 160 {linear actuator 170} solvent pan 180 {unused solvent tank 181} Single-use solvent tank 182 {Dual-use solvent tank 183} Waste solvent tank 184 {Coating liquid tank 190} Coating pump 192} Cleaning pump W # Width of opening of shim plate

Claims (2)

[Claims] 1. A slot die head comprising a manifold, a coating liquid supply block having a slit hole communicating with the manifold, and an upper and lower lip block forming a slit portion communicating with the slit hole. Two side-plate shim plates for adjusting the application width tightly fitted to both sides of the portion, a moving / swinging mechanism for moving and / or swinging the side shim plates in the direction of the application width, and the upper and lower lips A kind switch comprising: a holding / pressing mechanism for holding a side shim plate with a block and pressing in a coating thickness direction, and a coating liquid supply mechanism for supplying a coating liquid through a manifold from behind the upper and lower lip blocks. Slot die head easy to use. 2. A moving and swinging mechanism for moving and / or swinging the side shim plate, comprising: a shim plate holding block for vertically holding the side shim plate; and a shim plate and the shim plate holding block. 2
The rotating shim plate holding guide roller of the book and the shim plate holding guide roller are wound in an S-shape and guided in the coating width direction while being guided by shim plate holding belts fixed to both sides of the upper and lower lip blocks. 2. The slot die head according to claim 1, wherein the slot die head is moved and rocked.