JPH07284710A - Coating apparatus - Google Patents

Abstract

PURPOSE:To improve the shape of a coiling roll and provide a coating apparatus by which a magnetic recording medium with high quality can be manufactured at high produtivity. CONSTITUTION:Regarding an extrusion-type coating apparatus which has a coating material storage 1a to which a coating material 3 is supplied and which is an apparatus to apply the coating material 3 to a supporting body 6 running continuously through a slit 5 formed at the tip of a die 1 while extruding the coating material, either the supporting body 6 or the die 1 is made to possible to swing within a range in which the coating width does not exceed the width of the supporting body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called extrusion type coating apparatus, and more particularly to a coating apparatus suitable for coating a magnetic paint or the like when manufacturing a magnetic recording medium.

[0002]

2. Description of the Related Art Generally, as an audio tape or a video tape, a magnetic coating material prepared by dispersing and kneading a magnetic powder, a binder, a dispersant, a lubricant, etc. in an organic solvent is coated on a non-magnetic support such as a polyester film. A so-called coating type magnetic recording medium in which a magnetic layer is formed by doing so is used.

In producing this coating type magnetic recording medium, as a method for coating a magnetic coating on a non-magnetic support,
An extrusion method using an extrusion (die) type coating apparatus has been drawing attention and has been partially put into practical use. The extrusion type coating apparatus has a wide slit facing the tip surface and is provided with a die having a doctor edge in the vicinity of the tip portion, and is directed toward the surface of the running non-magnetic support. The magnetic coating material extruded continuously is applied to the non-magnetic support with a uniform thickness by the doctor edge.

This extrusion type coating apparatus is
A coating film with a uniform film thickness can be easily formed, and since it does not use a roll with a large diameter, it is advantageous in terms of cost reduction and downsizing of the device. It is used in such fields.

Conventionally, in the extrusion type coating apparatus, the die is fixed to a pedestal. For this reason, for example, if the coating thickness distribution in the width direction of the non-magnetic support is uneven or the coating thickness is thin or thick in the longitudinal direction and there is unevenness caused by the coating, the coating is applied when the non-magnetic support is wound up. The thin portion and the thick portion are laminated at the same position, and the winding roll has unevenness.

The unevenness generated on the take-up roll causes permanent distortion in the obtained magnetic tape and causes quality defects such as uneven elongation and bending of the magnetic tape which may cause a contact failure with the magnetic head. Further, also from the viewpoint of productivity, when the above-mentioned defective quality occurs, the yield is reduced by discarding the target portion, the coating is interrupted and corrected, and the coating length yield is reduced by performing re-coating,
Problems such as a decrease in operating rate will become serious.

[0007]

Therefore, the present invention has been proposed in view of such circumstances, and aims to improve the shape of the winding roll to provide a magnetic recording medium of high quality and excellent in productivity. An object is to provide a coating device that can be obtained.

[0008]

The present invention has been proposed to achieve the above object. That is, the present invention is an extrusion type which is provided with a die having a paint reservoir to which the paint is supplied, and which is applied on a continuously running support while extruding the paint through a slit provided at the tip of the die. In the coating apparatus, the coating is performed while swinging the support or the die within a range in which the coating width does not exceed the width of the support.

The extrusion type coating apparatus uses a die in which a slit is formed so as to face the front end surface and a doctor edge is formed in the vicinity of the front end surface, and the die is directed toward the surface of a running support. Is a coating device for coating the above-mentioned support with a uniform thickness by the doctor edge.

In the present invention, the support or die is swung within a range in which the coating width does not exceed the width of the support. Thereby, when winding the support, it is possible to prevent unevenness of the coating thickness distribution in the width direction or a thin coating thickness in the longitudinal direction, or to prevent thickened portions from being laminated at the same position,
The shape of the winding roll can be improved.

Here, as a means for swinging the support body in a predetermined width, for example, an edge controller (hereinafter,
It is written as EPC. ) Can be used. As this EPC, any commercially available EPC can be used.

Specific examples include a rewind reel type (PAY-OFF) type, an intermediate guide roll type (GUIDE ROLL) type, and a take-up reel type (WIND-UP) type.

The rewinding reel type is shown in FIG.
As shown in FIG. 4, the measuring nozzle 31 is fixed at a predetermined position, and the reel 34 formed by winding the support 32 by the operation cylinder 33 is shaken so that the end 32a of the support 32 is always at the position. It is operated and controlled. As shown in FIG. 13, the intermediate guide roll type is configured such that the measurement nozzle 31 is fixed at a predetermined position, and the operation cylinder 33 supports the end portion 32a of the support body 32 at the position. Guide roll 35 supporting the body 32
Is controlled by rocking.

In the intermediate guide roll type, there are a center pivot type and an end pivot type as the guide rolls.

Among them, the center pivot type, as shown in FIG. 14, has four guide rolls 36a, 36b,
c and d are arranged in a U shape, and the height of the support 32 from the central axis of the guide roll 36c is ½ W (W is The measurement nozzle 31 is arranged at a position equal to or less than the width of the support. In this center pivot system, as shown in FIG. 15, when the swing angle about the fulcrum A is θ, the swing amount is C, and the roll span is D, the formula (1 ) And equation (2).

[0016]

[Chemical 1]

On the other hand, the end pivot type is shown in FIG.
6 and FIG. 17, two guide rolls 37
a and b are arranged side by side, and the guide roll 3
The measurement nozzle 31 is arranged at a position where the distance from the central axis of 7b is 1/2 W (W is the support body width) or less. In the case of this end pivot type, as shown in FIG.
7, the swing amount (mm) about the fulcrum B is C, the width (mm) of the support is W, the thickness (mm) of the support is t, and the Young's modulus of the support (kgf / mm ² ) Is E, the tension (kgf) applied to the support is T, and the roll span (mm) is L, the relationship expressed by the following formula (3) is established.

[0018]

[Chemical 2]

The roll span L is preferably long. Further, in the take-up reel system, as shown in FIG.
Integrated with the take-up reel 38 on which the
One fixed roll 39 is arranged between the measuring nozzle 31 and the take-up reel 38. And the support 3
The second end portion 32a is configured such that the take-up reel 38 and the measuring nozzle 31 integrated with the take-up reel 38 always servo.

Each of the above-mentioned coating devices is suitable for use in coating a magnetic coating material on a coating type magnetic recording medium. In that case, a magnetic powder or a binder constituting a non-magnetic support or a magnetic coating film is used. Any known material can be used, and the like is not particularly limited.

As such a conventionally known magnetic powder,
For example, metallic materials such as Fe, Co and Ni, Fe-Co,
Fe-Ni, Fe-Al, Fe-Ni-Al, Fe-A
l-P, Fe-Ni-Si-Al, Fe-Ni-Si-
Al-Mn, Fe-Mn-Zn, Fe-Ni-Zn, C
o-Ni, Co-P, Fe-Co-Ni, Fe-Co-
Ni-Cr, Fe-Co-Ni-P, Fe-Co-B,
Fe-Co-Cr-B, Mn-Bi, Mn-Al, Fe
Examples thereof include alloy materials such as —Co—V, iron nitride, iron carbide and the like.

Even if an appropriate amount of a light metal element such as Al, Si, P, B added for the purpose of preventing sintering or maintaining the shape during reduction is contained, the effect of the present invention is not hindered.

Further, γ-Fe ₂ O ₃ , Fe ₃ O ₄ , γ-
Betride compound of Fe ₂ O ₃ and Fe ₃ O ₄ , Co
Γ-Fe ₂ O ₃ , Co-containing Fe ₃ O ₄ , a beltride compound of γ-Fe ₂ O ₃ containing Co and Fe ₃ O ₄ , one or more metallic elements in CrO ₂ , for example Te. , Oxides containing Sb, Fe, Bi, etc. can be used.

These magnetic powders may be used alone or in combination of two or more.

As the above-mentioned binder, either a thermoplastic resin or a thermosetting resin can be used.

Examples of the thermoplastic resin include vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinylidene chloride copolymer, vinyl chloride-acrylonitrile copolymer, acrylic ester-acrylonitrile copolymer, acrylic ester-vinylidene chloride copolymer. , Methacrylic acid ester-vinylidene chloride copolymer, methacrylic acid ester-vinyl chloride copolymer, methacrylic acid ester-ethylene copolymer, polyvinyl fluoride, vinylidene chloride-allylonitrile copolymer, acrylonitrile-butadiene copolymer, Polyamide resin, polyvinyl butyral, cellulose derivative (cellulose acetate butyrate, cellulose diacetate, cellulose triacetate, cellulose propionate, nitrocellulose), styrene-butadiene copolymer Polyester resin, amino resin,
There are thermoplastic resins such as synthetic rubber.

As the thermosetting resin, phenol resin,
There are epoxy resin, polyurethane resin, urea resin, melamine resin, alkyd resin, silicone resin, polyamine resin, urea formaldehyde resin and the like.

In the present invention, if necessary, a lubricant,
It is also possible to use non-magnetic reinforcing particles, conductive particles, surfactants, etc. as the constituent material of the magnetic layer. Examples of the lubricant include graphite, molybdenum disulfide, silicone oil, fatty acids having 10 to 22 carbon atoms, and fatty acid esters consisting of this and alcohols having 2 to 26 carbon atoms, terpene compounds, and oligomers thereof. is there.

The non-magnetic reinforcing particles include aluminum oxide, chromium oxide, silicon carbide, diamond, garnet, emery, boron nitride and the like. These particles are contained in an amount of 20 parts by weight based on 100 parts by weight of the magnetic powder.
Preferably, it is 10 parts by weight or less, and the average particle size is
It is 1.0 μm or less, preferably 0.5 μm or less.

Examples of the conductive particles include carbon black, graphite and other metal particles. Examples of the surfactant include nonionic, anionic, cationic and amphoteric surfactants.

Examples of the support include polyesters such as polyethylene terephthalate and polyethylene-2,6-naphthalate, polyolefins such as polypropylene,
Examples thereof include celluloses such as cellulose triacetate and cellulose diacetate, polymer materials typified by vinyl resins, polyimides and polycarbonates, and supports formed of metal, glass, ceramics and the like.

To form the magnetic layer on the support, the magnetic layer-constituting material is applied as a coating material and dried. The solvent used for forming the coating material is acetone,
Methyl ethyl ketone, methyl isobutyl ketone, ketone solvents such as cyclohexanone, alcohol solvents such as methanol, ethanol and propanol, methyl acetate,
Ethyl acetate, butyl acetate, propyl acetate, ethyl lactate,
Ester solvents such as ethylene glycol acetate, diethylene glycol dimethyl ether, ether solvents such as 2-ethoxyethanol, tetrahydrofuran and dioxane, aromatic hydrocarbon solvents such as benzene, toluene and xylene, methylene chloride, ethylene chloride, carbon tetrachloride, A halogenated hydrocarbon solvent such as chloroform or chlorobenzene can be used.

The coating apparatus of the present invention can be used not only for coating a magnetic coating material but also for coating a backcoat layer or a topcoat layer in the manufacturing process of such a coating type magnetic recording medium. is there. In addition, this coating device,
In addition to being used when applying the magnetic recording medium as described above, it can be used when applying a paint having a wide range of structural viscosity.

[0034]

When a coating solution is applied to a continuously traveling support by a die to form a coating film, the support or the die is oscillated while the coating width does not exceed the width of the support. By doing so, when the support is wound up, the unevenness of the coating thickness distribution in the width direction and the coating thickness being thin in the longitudinal direction in a stripe shape, or the thickened portion is not laminated at the same position. Therefore, it is possible to prevent unevenness in the shape of the winding roll.

[0035]

EXAMPLES Hereinafter, specific examples of the present invention will be described, but it goes without saying that the present invention is not limited to these examples.

Example 1 In this example, when a magnetic coating was applied on a polyethylene terephthalate film as a support to form a magnetic layer, the polyethylene was used in a range such that the coating width did not exceed the width of the support by EPC. In this example, coating is performed using a coating device in which a terephthalate ferm is swung.

First, the constitution of the coating apparatus used for coating and forming the magnetic coating material in this embodiment will be described.

That is, in this coating apparatus, as shown in FIGS. 1 and 2, a substantially rectangular parallelepiped having a predetermined width is provided at a midway portion where the support body 6 sequentially runs from the delivery side to the winding side. A die (extruder) 1 made of the metal block is disposed.

The die 1 is arranged below the support 6 which runs from left to right in FIGS. 1 and 2, and the tip end surface of the die 1 faces the surface of the support 6. It is arranged so that. The die 1 has a so-called wedge shape in which the vicinity of the front end surface is linearly shaved off to form a so-called wedge shape, and the front end surface is made of cemented carbide or the like to have a doctor edge.

Further, the die 1 is formed with a slit 5 having a width corresponding to the coating width so as to face the front end surface. The slit 5 is a gap through which the coating material 3 made of a magnetic material is pushed out, and is usually 0.01 to 2.
The gap is very narrow, about 0 mm.

In the die 1, the edges 4 and 4 facing the tip end face and facing each other through the slit 5 are
Each of them functions as a smoothing blade 4a and a front blade 4b. Therefore, the paint 3 extruded from the tip of the slit 5 through the slit 5 is continuously supplied onto the support 6 passing over the smoothing blade 4a and the front blade 4b with a predetermined pressure to form a coating film. It is formed. The surface of the obtained coating film is flattened by the smoothing blade 4a,
Good surface properties can be obtained.

On the back side of the slit 5, a pocket (coating liquid reservoir) 1a communicating with the slit 5 is formed. The pocket 1a is formed as an orifice-shaped space having a length substantially equal to the width of the slit 5.

A coating liquid supply port (not shown) is provided at both ends of the pocket 1a so as to open on both end faces of the die 1, and a coating liquid for introducing the coating material 3 is introduced into these coating liquid supply ports. A liquid supply pipe (not shown) is connected.
A coating liquid supply device 2 including, for example, a precision gear pump or the like is attached to a middle portion of the coating liquid supply pipe.
By this coating liquid supply device 2, the coating material 3 is pressure-fed from the coating liquid supply pipe into the pocket 1a at a predetermined pressure. Therefore, the pocket 1a becomes a space for receiving the paint 3 to be pumped, and thus has a function of an accumulator.

Paint 3 pumped into this pocket 1a
Is supplied into the slit 5, and the slit 5
Is extruded onto the surface of the support 6 from the tip of the coating film 8
Formed as.

On the other hand, an edge controller (EPC) 7 is arranged in front of the die 1. This EPC
The reference numeral 7 supports the support 6 that is moved and traveled from the delivery side to the winding side to enable smooth travel, and the coating width W _{2 of the} support 6 exceeds the support width W ₁ . Swing within the range that is not there. As a result, when the support 6 is wound on a winding roll (not shown), the coating thickness distribution in the width direction is thin, or the coating thickness is thin in the longitudinal direction, or the thickened portions are laminated at the same position. It will not be done. As a result, it is possible to prevent unevenness in the shape of the winding roll.

The coating width W ₂ is set to the slit 5
The width is limited by restricting the width of the support 6, and usually the uncoated portion is formed at both ends in the width direction of the support 6 with a width of about 3 to 10 mm. Therefore, even if the support 6 is swung by the EPC 7 within the above range, no problem occurs in the coating film formation.

Therefore, in this coating apparatus, the tip end surface of the die 1 is brought into contact with the surface of the support 6 fed from the unwinding side and traveling in the direction of the arrow X in the drawing.
Paint 3 supplied through the slit 5 at this tip surface
Are transferred to form the coating film 8. At this time, since the support 6 is swung by the EPC 7, the application thickness distribution in the width direction when winding the support 6 or the application thickness becomes thin or thick in the longitudinal direction in a stripe shape. The uneven portion is not laminated at the same position, and the unevenness generated on the surface of the winding roll is relaxed.

Then, using the coating device having the above-mentioned structure, a magnetic coating material was applied onto a polyethylene terephthalate film (14.5 μm thick) having a width of 620 mm and a roll length of 10000 m to prepare a VHS magnetic tape.

Upon coating, the thickness of the coating film after drying was 3.0 μm.
The coating width was adjusted to 600 m by the paint supply device and the slit width of the die was regulated. Further, as the EPC, a commercially available one was used, and the support was continuously rocked with a rocking amount of 5 to 10 mm and a rocking cycle of 30 seconds.

Then, the appearance of the winding roll shown in FIG. 5 was evaluated for the state of the obtained magnetic tape after winding. The results are shown in Table 1 below. Evaluation is based on the magnetic layer 22 formed on the base film 21 as shown in FIG.
Undulation of the coating thickness distribution in the width direction on the surface of (the portion A in FIG. 5), the portion where the coating thickness becomes streaky in the longitudinal direction as shown in FIG. 7 (the portion B in FIG. 5), FIG. A portion where the coating thickness becomes thin in the longitudinal direction as shown in FIG. 8 (C in FIG. 5)
(Part), the case where a remarkable improvement was observed was evaluated by ∘, the case where the irregularities on the surface of the winding roll were alleviated was evaluated as ◯, and the case where there was no effect was evaluated as x, and the result was visually determined.

[0051]

[Table 1]

For comparison, in the case where the EPC was not used and the support was not oscillated, and the magnetic coating material was applied in the same manner as in the present embodiment, for comparison. The appearance of the winding roll was examined by the same method, and the results are also shown in Table 1 above.

As shown in Table 1, in this embodiment,
The irregularities on the surface of the winding roll were alleviated, and the quality of the obtained magnetic tape was significantly improved.

A width of 620 mm was obtained using the above coating device.
Polyethylene terephthalate film (20μm thick)
Magnetic paint for professional video tape (viscosity 5000cp
s, measured with a B-type viscometer) to prepare a magnetic tape.

Upon coating, the thickness of the coating film after drying was 5.5 μm.
The coating width was adjusted to 610 mm by adjusting with a paint supply device and the slit width of the die was regulated. Further, the coating speed was 250 m / min.

Then, the roll shape after winding the obtained magnetic tape was examined. For comparison, in the coating apparatus, the EPC was not used, the support was not rocked, and the other cases were the same as in the case where the magnetic coating material was coated in the same manner as in this example. I checked.

9 (a) and 9 (b) are views showing the coating thickness distribution of the obtained magnetic tape and the magnetic tape total thickness distribution including the base film thickness, respectively, and FIGS. FIG. 6 is a diagram showing a roll shape after winding the magnetic tape in the case where the coating devices of the present example and the comparative example are respectively used. 9 (a), (b) and FIG. 10, FIG.
It can be seen from 1 that when the base film was not shaken as in the comparative example, the waviness of the coating thickness distribution in the width direction of the obtained magnetic tape, the thin portion of the coating thickness, and the thick portion of In the same position, the surface shape of the magnetic tape was reflected as it was, and large irregularities were found in the roll shape.

On the other hand, when the base film is swung as in this embodiment, the waviness of the coating thickness distribution in the width direction of the magnetic tape and the thin and thick coating portions are located at the same position on the roll. A good roll shape could be obtained without being laminated.

Example 2 In this example, when a magnetic coating material was applied onto a polyethylene terephthalate film as a support to form a magnetic layer, the width of application was not exceeded by the slider and the driving device. In this example, coating is performed using a coating device in which the die swings.

First, the structure of the coating apparatus used for coating and forming the magnetic coating material in this embodiment will be described. The basic structure of this coating device is the same as that of the coating device of the first embodiment. Therefore, the same members as those of the coating device of the first embodiment are designated by the same reference numerals and detailed description thereof is omitted.

That is, in this coating apparatus, as shown in FIGS. 3 and 4, the support 6 is sequentially run from the sending side to the winding side, and the coating liquid 3 supplies the coating material 3 with a predetermined pressure. A die 1 having a pocket (coating liquid reservoir) 1a that is pressure-fed by means of and a slit 5 that is a gap through which the paint 3 is pushed out, and a slider and a drive device 9 that supports the die 1 and swings it by a predetermined width. Be prepared.

The die 1 is disposed below the support 6 which runs from the left side to the right side in FIGS. 3 and 4, and the vicinity of the tip end surface thereof is made into a doctor edge to smooth the smoothing blade 4a and the front side. It is configured to function as the blade 4b. Therefore, the paint 3 supplied into the pocket 1a is continuously extruded from the tip of the support 2 passing through the smoothing blade 4a and the front blade 4b through the slit 5 with a predetermined pressure. The coating film 8 is formed.

The die 1 is supported by a slider and a driving device 9 attached to the bottom surface of the die 1 and swings in the direction of arrow Y in FIG. 3 within a range in which the coating width W ₂ does not exceed the width W ₁ of the support. To be done. As a result, when the support 6 is wound on a winding roll (not shown), the coating thickness distribution in the width direction is thin, or the coating thickness is thin in the longitudinal direction, or the thickened portions are laminated at the same position. It will not be done. As a result, it is possible to prevent unevenness in the shape of the winding roll.

The coating width W ₂ is set to the slit 5
The width is limited by restricting the width of the support 6, and usually the uncoated portion is formed at both ends in the width direction of the support 6 with a width of about 3 to 10 mm. Therefore, even if the support 6 is swung by the slider and the drive device 9 within the above-mentioned range, no problem occurs in the coating film formation.

Therefore, in this coating apparatus, the tip end surface of the die 1 is brought into contact with the surface of the support 6 fed from the unwinding side and traveling in the direction of the arrow X in the drawing.
Coating liquid 3 supplied through the slit 5 at the tip surface
Is transferred to form a coating film. At this time, since the die 1 is swung by the slider and the driving device 9, when the support 6 is wound up, the coating thickness distribution in the width direction and the coating thickness in the longitudinal direction are thin in a stripe shape, Alternatively, the thickened portions are not laminated at the same position, and the irregularities generated on the surface of the winding roll are alleviated.

Then, using the coating apparatus having the above-mentioned structure, a magnetic coating material was applied onto a polyethylene terephthalate film (14.5 μm thick) having a width of 620 mm and a roll length of 10000 m to prepare a VHS magnetic tape. The coating conditions were the same as in Example 1 above.

Then, with respect to the state of the obtained magnetic tape after winding, the appearance of the winding roll was evaluated in the same manner as in Example 1. As a result, in this example, the same effect as in Example 1 was obtained, the irregularities on the surface of the winding roll were alleviated, and the quality of the obtained magnetic tape was significantly improved.

[0068]

As is apparent from the above description, in the present invention, when the coating material is applied on the support continuously run by the extruder (die), the die or the support is slightly moved in the width direction. Since the support is rolled up, it is possible that when the support is wound up, the coating thickness distribution in the width direction is thin, or the coating thickness is thin in the longitudinal direction or the thickened portions are laminated at the same position. To be prevented. Therefore, the shape of the winding roll is improved, and the tape shape yield (yield) after cutting is significantly improved. Further, the frequency of interruption of coating is reduced and the operating rate is improved.

Furthermore, since the irregularities on the surface of the take-up roll are alleviated as described above, the contact characteristics of the obtained magnetic tape with the head are good, and the curvature of the tape is alleviated. Therefore, according to the present invention, a high-quality magnetic tape can be obtained, which is very effective especially in the production of a wide magnetic tape.

Further, the present invention can be expected to have a good effect even when applied to a micro gravure coating method which has the same problem as the extrusion type coating method,
It is possible to provide a very effective coating method that can be applied to various coating methods.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration example of a coating apparatus according to the present invention.

FIG. 2 is a cross-sectional view showing a configuration example of a coating apparatus according to the present invention.

FIG. 3 is a plan view showing another configuration example of the coating apparatus according to the present invention.

FIG. 4 is a cross-sectional view showing another configuration example of the coating apparatus according to the present invention.

FIG. 5 is a perspective view showing a configuration of a winding roll in a state where a magnetic tape having a magnetic coating film formed thereon is wound.

FIG. 6 is a cross-sectional view showing a state in which a waviness in the coating thickness distribution in the width direction occurs on the magnetic tape wound on the winding roll.

FIG. 7 is a cross-sectional view showing a state in which a stripe-shaped thick portion having a large coating thickness is formed on the magnetic tape wound around the winding roll.

FIG. 8 is a cross-sectional view showing a state in which a stripe-shaped thin portion having a thin coating thickness is formed on the magnetic tape wound around the winding roll.

FIG. 9 is a characteristic diagram showing a coating thickness distribution (a) of a magnetic tape on which a magnetic layer is formed and a tape total thickness distribution (b) including a non-magnetic support thickness.

FIG. 10 is a characteristic diagram showing a roll shape of the magnetic tape obtained when the base film is rocked.

FIG. 11 is a characteristic diagram showing a roll shape of the magnetic tape obtained when the base film is not rocked.

FIG. 12 is a perspective view showing a configuration example of a rewind reel type EPC.

FIG. 13 is a perspective view showing a configuration example of an EPC of an intermediate guide roll system.

FIG. 14 is a cross-sectional view showing one configuration example of a center pivot type guide roll mechanism.

FIG. 15 is a plan view showing a configuration example of a center pivot type guide roll mechanism.

FIG. 16 is a cross-sectional view showing a structural example of an end pivot guide roll mechanism.

FIG. 17 is a plan view showing a configuration example of an end pivot guide roll mechanism.

FIG. 18 is a perspective view showing a configuration example of a take-up reel type EPC.

[Explanation of symbols]

 1 Die 1a Pocket (Coating Liquid Reservoir) 2 Coating Liquid Supply Device 3 Paint 4a Smoothing Blade 4b Front Blade 5 Slit 6 Support 7 EPC (Edge Controller) 8 Coating Film 9 Slider and Drive Device

Claims (1)

[Claims] 1. An extrusion type die, which comprises a die having a paint reservoir to which the paint is supplied, and which applies the paint while pushing it out through a slit provided at the tip of the die on a continuously running support. In the coating apparatus, coating is performed while swinging the support or the die within a range in which the coating width does not exceed the width of the support.