JPH11179260A - Coating width changing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the coating width changing device capable of rapidly changing an coating width without suspending the operation of the device and not causing the leakage of liquid. SOLUTION: A coating soln. is applied on a traveling web, and the coating width is changed by a spacer 21 inserted into both ends of the slit 16 of a coating head 12 and a pocket plug 24 inserted into both ends of a manifold 14. In this coating width changing device, the spacer 21 is composed of an upper spacer 22 having a split part 32 parallel to the manifold 14 on the lip tip 12A side and a lower spacer 23 on the manifold 14 side, and the lower spacer 23 is joined to the pocket plug 24. Further, at least the upper spacer 22 between the upper spacer 22 and the pocket plug 24 provided with the lower spacer 23 is slid in accordance with the coating width.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic photosensitive solution on a running long flexible support (hereinafter referred to as "web").
BACKGROUND OF THE INVENTION The present invention relates to a coating width changing device for changing a coating width, particularly to a coating device for applying a coating solution such as a magnetic liquid or a solvent paint using water or a solvent as a solvent.

[0002]

2. Description of the Related Art A coating apparatus for applying a coating liquid containing water or a solvent such as a photographic photosensitive liquid, a magnetic liquid, or a solvent coating to a web, uses a coating liquid sent to a manifold in a coating head.
It is extruded outside through a slit communicating with the manifold, and is applied to a running web. In this case, the coating width applied to the web needs to be changed according to the width of the web, and in general, a spacer inserted at both ends of the slit,
This is done by pocket plugs inserted at both ends of the manifold.

A conventional coating width changing device using a spacer and a pocket plug is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-198240.
Japanese Patent Application Laid-Open No. 7-88419 and Japanese Patent Application Laid-Open No. 7-88419 disclose a method in which a spacer and a pocket plug are integrated and slid according to the application width. Also, JP-A-4-222
JP-A-660 and JP-A-7-171457 disclose that a spacer and a pocket plug are integrated and slid, and after sliding, the pocket plug is pushed open and fixed.

Further, Japanese Patent Application Laid-Open Nos. 4-281876, 5-38477 and 62-152563 have been disclosed.
Japanese Patent Application Laid-Open Publication No. H11-163873 discloses that spacers having different sizes are exchanged according to the application width. Also, Japanese Patent Application Laid-Open No. 2-10
No. 7,368 discloses that a part of the coating head is replaced to correspond to the coating width.

Also, Japanese Patent Application Laid-Open Nos. Hei 5-317778 and Hei 5-337423, Patent Registration No. 2524484
Japanese Patent Application Laid-Open No. H11-157, discloses that the fastening portion is loosened, the slit is widened, the spacer is slid, and then the fastening portion is fastened again.

[0006]

However, the coating width changing device in which the spacer and the pocket plug are integrated and slid requires a large force for the slide, and the slide cannot be performed smoothly. Therefore, only the slit or the manifold is damaged. In addition, there is a disadvantage that the spacer and the pocket plug are easily damaged.

Further, a coating width changing apparatus for exchanging spacers having different sizes in accordance with the coating width requires time for changing the spacers, and it is necessary to stop the supply of the coating liquid to the coating head when changing the spacers. Therefore, there is a disadvantage that the operation of the coating apparatus must be stopped. In addition, the coating width changing device, which loosens the tightening portion, widens the slit, slides the spacer, and then tightens the tightening portion again, complicates the structure and supplies the coating liquid to the coating head to widen the slit Has to be stopped, and the operation of the coating apparatus must be stopped.

Further, among the conventional coating width changing apparatuses,
In the case where the spacer and the pocket plug are divided, the spacer has a thin plate shape, whereas the pocket plug has a substantially cylindrical shape according to the shape of the manifold. There is a disadvantage that the coating liquid is likely to leak. As described above, none of the conventional coating width changing devices has been satisfactory.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and enables a change in the coating width to be performed quickly without stopping the operation of the coating apparatus, and a coating width changing apparatus which is free from liquid leakage. The purpose is to provide.

[0010]

According to the present invention, in order to achieve the above object, a coating liquid fed to a manifold in a coating head is supplied from a tip end of a lip of the coating head through a slit communicating with the manifold. A coating device that discharges to the outside and coats the elongated flexible support that travels, wherein a coating width to be applied to the elongated support is set by a spacer inserted into an end of the slit and the manifold. In the application width changing device that changes with the pocket plug inserted into the end of the
The spacer has a divided portion parallel to the manifold, and is composed of two spacers including an upper spacer on the lip tip side and a lower spacer on the manifold side, and the lower spacer is used as the pocket stopper. It is characterized in that at least the upper spacer of the upper spacer and the pocket plug with the lower spacer is slid according to the application width. The lower spacer and the pocket plug may be integrally formed.

According to the present invention, the spacer is constituted by an upper spacer having a divided portion parallel to the manifold and a pocket plug with a lower spacer, the lower spacer is joined to the pocket plug, and the upper spacer and the lower spacer are joined together. Since at least the upper spacer of the pocket plug with a spacer is slid according to the application width, the application width can be changed even while the application device is operating.

Further, since the dividing portion is formed not in the space between the spacer and the pocket plug as in the conventional application width changing device, the liquid does not leak in the dividing portion.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a coating width changing apparatus according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a sectional view schematically illustrating a coating apparatus 10 incorporating a coating width changing apparatus according to the present invention.

As shown in FIG. 1, a manifold 14 is formed in the coating head 12 in a width direction W (see FIG. 3) of the coating head 12, and the coating liquid sent to the manifold 14 is a manifold. Slit 1 communicating with 14
6 and is pushed out from the lip tip 12A of the coating head 12 to the outside. The application liquid extruded outside is applied to the web 20 that travels while engaging with the backup roller 18. Although FIG. 1 shows an example in which the coating liquid is pushed upward, the coating liquid may be pushed laterally or downward. In addition, although the manifold 14 is shown as one example, a multi-layer coating solution in which a plurality of coating solutions are fed to each manifold 14 and joined immediately before the slit 16 or at the lip tip 12A is applied to the web 20. It may be.

FIGS. 2 to 5 are explanatory views for explaining a first embodiment of the coating apparatus 10 incorporating the coating width changing apparatus of the present invention, in which only an upper spacer 22 described later is slid. As shown in these drawings, pocket plugs 24 each having a substantially cylindrical shape corresponding to the shape of the manifold 14 are inserted into both ends of the manifold 14 of the coating head 12, and seal members are attached to both ends of the manifold 14. The side plate 24 is fixed to the side surface 12 </ b> B of the coating head 12 with bolts 28. This prevents the application liquid from leaking from the manifold 14. Also, one end of the manifold 14 is provided with the side plate 2.
A liquid feed pipe 30 that feeds the application liquid into the manifold 14 through the pocket 6 and the pocket plug 24 is connected (see FIG. 3).

At both ends of the slit 16 of the coating head 12, spacers 21 are inserted.
It has a split part 32 parallel to the manifold,
The two spacers 21 include an upper spacer 22 on the 2A side and a lower spacer 23 on the manifold 14. The lower spacer 23 is joined to the pocket plug 24.
The lower spacer 23 and the pocket plug 24 may be formed integrally. Then, the upper spacer 22 slides in the slit 16 according to the application width. The division length L of the lower spacer 23 joined to the pocket plug 24 is 1 to 50.
mm, preferably 5 to 15 mm. The reason is that if the division length L is too short, the sealing performance of the division part 32 is inferior,
If the length is too long, the joint between the lower spacer 23 and the pocket plug 24 tends to be damaged.

Further, as shown in FIG.
Of the coating solution contact surface 24A of the
The flow of the coating solution sent into the manifold 14 from
It is preferable that the taper is guided in the direction of the slit 16 by a taper. FIGS. 6A and 6B show the upper spacer 22 and the divided portion 32 of the lower spacer 23 joined to or integrally formed with the pocket plug 24. In FIG. 6, the divided portion 3 of the upper spacer 22 and the lower spacer 23
2, a gap is formed, but in actuality, the dividing portion 32
Are closely contacted in the slit 16. An upper spacer 22;
The lower spacer 23 joined to the pocket stopper 24 is shown in FIG.
As shown in FIG. 6A, the spacer 21 may be cut horizontally to form the divided portion 32, or as shown in FIG.
2 may be formed. By cutting obliquely, the contact area of the divided portion 32 between the upper spacer 22 and the lower spacer 23 can be increased, so that the effect of preventing liquid leakage at the divided portion can be more effectively prevented. By the way, FIG. 6 (c)
Is a conventional coating width changing device divided by a spacer 21 and a pocket plug 24. Since a gap is easily generated in a divided portion 32 between the thin plate-shaped spacer 21 and the substantially cylindrical pocket plug 24, the dividing is performed. The sealing performance in the portion 32 is poor, and liquid leakage occurs. In this case, the spacer 21 and the pocket plug 24
It is extremely difficult to process the pocket plug 24 so that there is no gap in the divided portion.

The upper spacer 22 and the lower spacer 2
The material of 3 and pocket plug 24 is preferably a synthetic resin or a metal surface coated with a synthetic resin. Since the upper spacer 22, the lower spacer 23, and the pocket plug 24 are made of a synthetic resin or the like having a lower hardness than the coating head, the slit 16 and the manifold 14 are not damaged by abrasion during sliding. On the other hand, when the upper spacer 22 or the pocket plug 24 with the lower spacer 23 is inserted or slid, the spacers 22, 23 and the pocket plug 24 are worn, but compared with the processing of the coating head 12. It is much easier to work with and can easily be replaced with a new one.

Further, by improving the spacer 21 into various shapes, it is possible to prevent thick coating of the ear portions at both ends of the web 20 and the like. Next, the operation of the coating width changing device configured as described above will be described. When the application width is changed by switching the lot of the web 20 to which the application liquid is applied, the upper spacer 22 is slid in the slit 16 in the arrow direction 34 according to the application width. Thereby, the application width of the application liquid discharged from the lip tip 12A of the application head 12 can be changed. At this time, the spacer 21 is constituted by an upper spacer 22 having a divided portion 32 parallel to the manifold 14 and a pocket plug 24 with a lower spacer 23, and the lower spacer 23 is joined to the pocket plug 24 or as an integral body. Since the upper spacer 22 is formed and slid according to the coating width, the coating width can be changed even while the coating apparatus 10 is operating.

Further, since the divided portion 32 is formed in the spacer 21 instead of between the spacer 21 and the pocket plug 24 as in the conventional coating width changing device, the divided portion 32 can be reliably sealed. Therefore, the sealing performance of the divided portion 32 is improved, so that no liquid leakage occurs in the divided portion 32.
Also, since the upper spacer 22 and the pocket plug 24 with the lower spacer 23 are separated, the upper spacer 22
Can be slid with a small sliding force.

FIG. 7 is an explanatory view for explaining a second embodiment of the coating width changing apparatus according to the present invention.
Is provided with a positioning device 36 for positioning the slide position. The same members and devices as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. As shown in FIG. 7, a positioning table 38 is supported on one end side surface of the coating head 12 in parallel with the upper spacer 22, and a slide handle 40 is provided at an end of the upper spacer 22.
A scale 42 is attached to the positioning table 38 in the sliding direction of the upper spacer 22, and a stopper 44 is fixed to one end of the scale 42. On the scale 42,
A reference block 46 for determining the slide position of the upper spacer 22 corresponding to the application width can be placed.
A fixing device 48 is provided on the positioning table 38, and the fixing device 48 fixes the upper spacer 22 to the positioning table 38. As shown in FIG. 8, the fixing device 48 includes an inverted L-shaped bolt supporting member 50 supported by the positioning table 38.
And a bolt member 52 penetrating in a state of being screwed to the bolt support member 50, and the upper spacer 22 is located between the bolt support member 50 and the positioning table 38. As a result, when the bolt member 52 is rotated in a direction in which the bolt member 52 is screwed into the bolt support member 50, the upper spacer 22
It is pressed and fixed to the positioning table 38 by the tip of 2.

In the second embodiment configured as described above, when the coating width is changed, the reference block 46 corresponding to the coating width is placed on the scale 42 so as to abut the stopper 44. I do. Then, the upper spacer 22 is slid until the handle 40 hits the reference block 46. Thereby, the slide position of the upper spacer 22 can be accurately positioned according to the application width. In this case, the slide position of the upper spacer 22 can be determined by reading the position of the handle 40 when the upper spacer 22 slides without using the reference block 46 by the scale 42.

Next, when the upper spacer 22 is slid to the slide position, the upper spacer 22 is fixed to the positioning table 38 by the fixing device 48. Accordingly, the upper spacer 22 does not deviate from the slide position, so that the application width can be accurately maintained. When the upper spacer 22 is slid, the bolt member 52 may be loosened.

As a result, in the second embodiment, the same effects as in the first embodiment can be obtained, and in the second embodiment, the sliding position of the upper spacer 22 can be more accurately determined. Can be positioned well. FIG.
Is an explanatory view for explaining a third embodiment of the application width changing device of the present invention, in which both an upper spacer 22 and a pocket plug 24 with a lower spacer 23 are slidable. The same members and devices as those in the first and second embodiments are denoted by the same reference numerals, and description thereof is omitted.

On the side of the coating head 12 on the side where the liquid feed pipe 30 is not provided, one end is fixed to a pocket plug 24 with a lower spacer 23 and the other slides through the side plate 26 and projects to the outside. A rod 54 is provided. Slide bar 5
A slide handle 56 is attached to the base end of the slide 4.
A scale 58 for a slide bar is provided at the lower end of the positioning table 38, and the position of the handle 56 when the pocket plug 24 with the lower spacer 23 is slid is set to the scale 5.
By reading at 8, the slide position of the pocket plug 24 with the lower spacer 23 can be determined.
A fastening ring 60 is slidably inserted into the slide bar 54. The tightening ring 60 is fixed to the side plate 26 of the coating head 12 and includes a male ring 60A having an external thread engraved thereon, and a female ring 60B having an internal thread engraved on the inner surface. By screwing the female screw of the ring 60B, the inner diameter of the male ring 60A is contracted and the slide bar 54 is fixed.

In the third embodiment configured as described above, when changing the coating width, the upper spacer 22
Is slid according to the application width in the manner described in the second embodiment. The pocket plug 24 with the lower spacer 23 is slid in the arrow direction 62 while reading the position of the handle 56 of the slide bar 54 with the scale 58.

Next, the pocket plug 2 with the lower spacer 23
When the slide 4 is moved to the slide position, the slide bar 54 is fixed with the tightening ring 60. Accordingly, the pocket plug 24 with the lower spacer 23 does not shift from the slide position, and the application width can be accurately maintained. When sliding the pocket plug 24 with the lower spacer 23, the female ring 60B may be rotated to loosen the tightening of the slide bar 54.

Thus, in the third embodiment, the same effects as in the first and second embodiments can be obtained. In the third embodiment, the upper spacer 22
And the pocket stopper 24 with the lower spacer is slid, so that the stagnation of the coating liquid in the division 32 between the upper spacer 22 and the lower spacer 23 can be prevented. Therefore, the flow of the coating liquid from the manifold 14 to the slit 16 becomes smooth.

Incidentally, the pocket plug 24 with the upper spacer 22 and the lower spacer 23 in the first to third embodiments.
The slide is not limited to human power, and an automatic device that slides to a slide position automatically set may be provided. Although the upper spacer 22 and the pocket plug 24 with the lower spacer 23 are inserted at both ends of the slit 16 or the manifold 14, they may be inserted at one end.

The coating width changing apparatus of the present invention can also be applied to a casting die for film formation, an extrusion die for film formation, and an extrusion die for lamination.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As described in the first and second embodiments,
The embodiment will be described with an example of a coating width changing device that slides only the upper spacer. The web is made of a PET resin (polyethylene terephthalate resin) having a thickness of 0.2 mm and a web width of 1000 mm.
mm was set on the upper spacer. The application speed of the application liquid applied on the web surface was set to 50 m / min. The relationship between the upper spacer and the pocket plug with the lower spacer is as shown in FIG. 6A, and the division length (L) of the upstream spacer is 12 mm.

The two types of coating solutions shown in Table 1 were used as the coating solutions.

[0033]

[Table 1] As a comparative example, the kind of the coating liquid and the like were performed in the same manner as in the example for the coating width changing device in which the spacer and the pocket plug shown in FIG. The material of the spacer is
In each of the examples and comparative examples, a PET resin-based resin was used, and a spacer having a thickness 0.01 mm smaller than the inner dimension of the slit was used.

As a result, in the comparative example using the coating liquid 1,
A leakage of the coating solution of 5 cc / hour was observed. In the comparative example using the coating liquid 2 having a lower viscosity than the coating liquid 1 and a larger flow rate of the coating liquid per hour, the flow rate was 30 cc / hour, and the leakage of the coating liquid was further increased. In the case of the comparative example,
When the spacer was slid to change the coating width from 800 mm to 750 mm, there was a larger leak amount than the above leak amount.

On the other hand, in the embodiment using the coating liquids 1 and 2, no leakage of the coating liquid was observed, and further, the upper spacer was slid in order to change the coating width from 800 mm to 750 mm. No leakage of the coating solution was observed both after and after the slide.

[0036]

As described above, according to the coating width changing device of the present invention, when changing the coating width, the coating width can be changed quickly without stopping the coating device. Therefore, the efficiency of the coating operation can be greatly improved. Further, since no leakage of the coating liquid occurs, the coating apparatus and the surroundings are not stained.

Further, since the coating width changing apparatus of the present invention has a simple configuration, the apparatus cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically illustrating a coating apparatus.

FIG. 2 is an explanatory view illustrating a coating apparatus incorporating the coating width changing apparatus according to the first embodiment of the present invention;

FIG. 3 is a cross-sectional view illustrating a coating apparatus incorporating the coating width changing apparatus according to the first embodiment of the present invention.

FIG. 4 is a side view illustrating a coating apparatus incorporating the coating width changing apparatus according to the first embodiment of the present invention.

FIG. 5 is another explanatory view illustrating a coating apparatus incorporating the coating width changing apparatus according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram illustrating a divided portion between an upper spacer and a lower spacer or a divided portion between a spacer and a pocket plug.

FIG. 7 is an explanatory view illustrating a coating apparatus incorporating a coating width changing apparatus according to a second embodiment of the present invention.

FIG. 8 is an explanatory view illustrating a fixing device in a coating apparatus incorporating a coating width changing apparatus according to a second embodiment of the present invention.

FIG. 9 is an explanatory view illustrating a fixing device in a coating apparatus incorporating a coating width changing apparatus according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Coating device 12 ... Coating head 14 ... Manifold 16 ... Slit 18 ... Backup roller 20 ... Web 21 ... Spacer 22 ... Upper spacer 23 ... Lower spacer 24 ... Pocket plug 32 ... Dividing part

Claims (5)

[Claims] An elongated flexible support that travels by discharging a coating liquid sent to a manifold in a coating head from a tip end of a lip of the coating head through a slit communicating with the manifold and running. A coating device for coating on
An application width changing device for changing an application width applied to the elongated support with a spacer inserted at an end of the slit and a pocket plug inserted at an end of the manifold, wherein the spacer is provided on the manifold. It has two parallel spacers, consisting of an upper spacer on the tip side of the lip and a lower spacer on the manifold side. The lower spacer is joined to the pocket stopper, and the upper spacer and An application width changing device, wherein at least an upper spacer of a pocket plug with a lower spacer is slid according to the application width. 2. A long, flexible support that discharges a coating solution sent to a manifold in a coating head from a tip end of a lip of the coating head through a slit communicating with the manifold and travels. A coating device for coating on
An application width changing device for changing an application width applied to the elongated support with a spacer inserted at an end of the slit and a pocket plug inserted at an end of the manifold, wherein the spacer is provided on the manifold. A parallel split portion, comprising two spacers consisting of an upper spacer on the lip tip side and a lower spacer on the manifold side, wherein the lower spacer is integrally formed with the pocket plug, An application width changing device, wherein at least an upper spacer of an upper spacer and a pocket plug with a lower spacer is slid according to the application width. 3. A positioning means for positioning a slide position of the upper spacer.
Or 2) a coating width changing device. 4. A coating width changing device according to claim 1, further comprising fixing means for fixing said upper spacer. 5. A division width of the lower spacer is 1 to 50 m.
m, preferably 5 to 15 mm.