JP2003275651A - Coating device - Google Patents

Abstract

(57) [Problem] To provide an inexpensive coating apparatus which can easily cope with a change in the shape of a stripe pattern as a coating apparatus for coating a strip-shaped base material with a stripe pattern. SOLUTION: A front block 3 located on the upstream side with respect to the traveling direction of the continuously running strip-shaped substrate 2, a back block 4 located on the downstream side, and a central block 5 located between these two blocks are provided. In the die coater 1, a front spacer 6 having a slit that forms a discharge port between the front block 3 and the central block 5 is replaced with a slit that forms a discharge port between the back block 4 and the central block 5. Back spacer 7 having
Are respectively detachably interposed, and both discharge ports of these spacers are arranged at mutually different positions in the width direction of the band-shaped base material 2, and different paints are discharged from the both discharge ports through respective slits. A coating apparatus characterized in that a stripe pattern is coated on the surface of the belt-shaped substrate 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating device for coating a striped pattern by discharging different paints from a discharge port onto the surface of a continuously running strip-shaped substrate.

[0002]

2. Description of the Related Art Conventionally, a recording medium such as a cash voucher such as a gift certificate or a card is coated with a coating material serving as a recording layer or an adhesive layer on a strip-shaped base material and then cut into a predetermined width to form a tape. It was made by adhering to the body of cash vouchers and cards. However, this method requires time and labor for cutting and bonding, and if the tape width after cutting is narrow, problems such as position fixing and tape reversal at the time of bonding tend to occur.

In order to solve these problems, different paints are discharged from a plurality of discharge ports of a die coater onto a continuously running strip-shaped base material so that a stripe pattern is directly applied to the surface of the base material. Is proposed (JP-A-10-277460, JP-A-11).
-207237, etc.). According to this, since the stripe pattern to be the recording layer or the adhesive layer can be directly formed on the base material, there is no need for the conventional tape-shaped cutting and the adhesion work to the main body, and the cash vouchers such as gift certificates and cards. The recording medium can be easily manufactured.

[0004]

However, in the coating apparatus proposed above, different paints are applied to the front block located on the upstream side and the back block located on the downstream side with respect to the running direction of the continuously running strip-shaped substrate. A die coater in which both blocks themselves are machined and designed, that is, an apparatus in which the die itself is machined and designed in a shape that matches the stripe pattern, is used so that there are discharge ports for discharging. Therefore, if the shape of the applied stripe pattern is different, it is necessary to redesign the die itself, which makes the device expensive.

In view of such circumstances, the present invention provides an inexpensive coating apparatus which can easily cope with a change in the shape of the stripe pattern, as a coating apparatus for coating the stripe pattern on the surface of a continuously running strip-shaped substrate. Is intended.

[0006]

Means for Solving the Problems The inventors of the present invention have made earnest studies on the above-mentioned object, and as a result, have found that a front block located on the upstream side with respect to the traveling direction of a strip-shaped base material which continuously travels and a front block located on the downstream side. In a die coater provided with a back block located and a central block located between these two blocks, a front spacer having a slit that forms a discharge port between the front block and the central block, and the back block Back spacers each having a slit forming a discharge port with the central block are detachably interposed, and both discharge ports of these spacers are arranged at different positions in the width direction of the strip-shaped substrate. The feature is that the stripe pattern is applied to the surface of the strip-shaped substrate by discharging different paint from the discharge port through each slit. The coating apparatus according to, those that could achieve the above object.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a die coater portion of the coating apparatus of the present invention. The die coater 1
A front block 3 located on the upstream side with respect to the running direction D of the strip-shaped base material 2 running continuously, a back block 4 located on the downstream side, and a central block 5 located between the blocks 3 and 4 are provided. The blocks 3, 4, and 5 are made of metal such as stainless steel, and are tightly connected by fasteners (not shown) such as bolts.

In this die coater 1, a front spacer 6 is interposed between the front block 3 and the central block 5, and a back spacer 7 is interposed between the back block 4 and the central block 5. Both the spacers 6 and 7 are made of a metal plate having a thickness of 0.1 to 1 mm, but may be made of a plastic sheet such as polyethylene terephthalate. Further, both spacers 6 and 7 are firmly sandwiched and fastened between the both blocks when the coating device is used, but they are interposed so as to be easily removable after use. .

Further, in this die coater 1, the front block 3 is provided with a first paint supply port 8 and the back block 4 is provided with a second paint supply port 9, respectively. The front block 3 and the front spacer are respectively provided. 6 communicates with a manifold 10 provided on the contact surface portion with 6 and a manifold 11 provided on the contact surface portion with the back block 4 and the back spacer 7. As a result, the paints supplied from the paint supply port 8 and the paint supply port 9 into the die coater 1 are filled inside the manifold 10 and the manifold 11, respectively, and have a uniform pressure in the coating width direction.

As shown in FIG. 2, the front spacer 6 is provided with two slits 12 which serve as a flow path for the paint supplied from the paint supply port 8, and the tip of each slit 12 forms a discharge port 12A. is doing. Similarly, the back spacer 7
As shown in FIG. 3, there are provided three slits 13 that serve as a flow path for the paint supplied from the paint supply port 9, and the tip of each slit 13 forms a discharge port 13A.

These outlet 12A and outlet 13A
As shown in FIG. 4, the strip-shaped base material 2 is arranged so as to face the strip-shaped base material 2 at positions different from each other in the width direction, and all of these discharge ports 12A and 13A make the strip-shaped base material 2 uniform in the width direction. In this way, the paint can be discharged.
That is, the front spacer 6 and the back spacer 7 are provided with the above-mentioned two slits 12 and three slits 13 respectively so as to have such a configuration.

In the coating apparatus thus constructed,
When different coating materials are supplied to the coating material supply ports 8 and 9 by a supply means such as a gear pump while the strip-shaped base material 2 is continuously traveling at a speed of 10 to 80 m / min, the two coating materials have widths in the manifolds 10 and 11, respectively. A uniform pressure is applied in the direction, and is guided to the tip of the die coater through the two slits 12 and the three slits 13, that is, using these slits as a flow path, and the discharge ports 12A and 1
It is ejected onto the strip-shaped substrate 2 from 3A.

As a result, as shown in FIG. 5, the first coating material 1 ejected from the ejection port 12A on the surface of the strip-shaped base material 2.
4 and the second coating material 15 discharged from the discharge port 13A are applied in a stripe shape in the traveling direction D to form a coating film. That is, a stripe pattern in which the coating film made of the first coating material 14 has a stripe shape is formed. At that time, by adjusting the supply amounts of the first coating material 14 and the second coating material 15, the coating surface can be smoothed in the width direction, and the thickness of the entire coating film can be set by using both coating materials. This can be easily done by adjusting the supply amount and the traveling speed of the base material.

Further, in the above coating apparatus, the shapes of the discharge ports 12A and 13A can be arbitrarily changed by changing the number of slits 12 provided in the front spacer 6 and the slits 13 provided in the back spacer 7 and the slit width. The shape of the stripe pattern can be easily changed.

FIG. 6 shows, as a special mode of the above-mentioned change, one wide slit capable of applying the slit 13 of the back spacer 7 to the entire surface in the width direction of the substrate without changing the slit shape of the front spacer 6. By changing the shape,
It shows a state in which the strip-shaped first coating material 14 and the second coating material 15 are applied to the entire surface of the base material so as to cover the first coating material 14 on the surface of the strip-shaped base material 2. According to the above coating device, such a stripe pattern can be formed.

As described above, according to the present invention, when the shape of the stripe pattern is changed, the die shape of the die coater 1 including the front block 3, the back block 4 and the central block 5 is left unchanged, and the slits corresponding to the pattern shape are formed. It is only necessary to replace the front spacer 6 and the back spacer 7 that they have, and it is possible to provide an inexpensive coating apparatus that can easily cope with the change in the shape of the stripe pattern.

As a modification of the present invention, the central block 5 constituting the die coater 1 is divided into at least two blocks located upstream and downstream with respect to the running direction D of the belt-shaped substrate 2. A central spacer having a slit that forms a discharge port similar to the above may be detachably interposed between the blocks. In addition to the front spacer 6 and the back spacer 7 described above, by providing the central spacer as described above and appropriately setting the slit shape, not only two kinds of paints but also three or more kinds of paints are formed in a stripe pattern. It is also possible to apply.

[0018]

As described above, according to the present invention, the front spacer and the back spacer having the slits forming the discharge port are detachably interposed in the die coater, so that both spacers can be exchanged. Thus, it is possible to provide an inexpensive coating apparatus which can easily cope with the change in the shape of the stripe pattern.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a die coater portion of a coating apparatus of the present invention.

FIG. 2 is a plan view showing a front spacer of the coating apparatus.

FIG. 3 is a plan view showing a back spacer of the coating apparatus.

FIG. 4 is an enlarged view of a head tip portion of a die coater of the coating apparatus.

FIG. 5 is a perspective view schematically showing a state in which different coating materials are applied in a stripe pattern on a strip-shaped substrate by using the coating device.

FIG. 6 is a cross-sectional view showing a modified example of the stripe pattern.

[Explanation of symbols]

1 die coater 2 band-shaped substrate 3 front block 4 back block 5 central block 6 Front spacer 7 Back spacer 8 First paint supply port 9 Second paint supply port 10 manifold 11 manifold 12 slits 12A outlet 13 slits 13A discharge port 14 First paint 15 Second paint D running direction w width direction

Continued front page    F-term (reference) 4F041 AA12 AB02 BA12 BA13 BA21                       BA23 CA02 CA13                 4F042 AA22 BA03 BA08 BA25

Claims (2)

[Claims] 1. A die coater comprising a front block located upstream in a running direction of a strip-shaped base material continuously running, a back block located downstream, and a central block located between these blocks. , A front spacer having a slit forming an ejection port between the front block and the central block, and a back spacer having a slit forming an ejection port between the back block and the central block can be attached and detached respectively. The discharge ports of these spacers are arranged at different positions in the width direction of the strip-shaped substrate, and different paints are discharged from the discharge ports through the respective slits to the surface of the strip-shaped substrate. A coating apparatus having a structure for coating a stripe pattern. 2. The coating apparatus according to claim 1, wherein the front spacer and / or the back spacer has a plurality of slits forming a discharge port.