KR101603382B1 - Apparatus for coating - Google Patents

Abstract

The present specification relates to a coating apparatus including a guide roll for moving a coating material.

Description

[0001] APPARATUS FOR COATING [0002]

The present specification relates to a coating apparatus including a guide roll for moving a coating material.

Generally, in a roll-to-roll process, a cylindrical roll is used to move a coated object. When the cylindrical roll is used as described above, the area of contact of the coated material with the roll is large to facilitate the cross-sectional coating, and the same process must be repeated to perform the two-side coating. As a result, when the double-side coating is performed, the production speed is lowered as a whole, and the production cost is increased.

Korean Patent Laid-Open Publication No. 2006-0111357

The present specification intends to provide a coating apparatus including a guide roll for moving a coating material.

The present invention relates to a coating material supply apparatus,

A coating material recovery unit;

A guide roll provided on one surface of the coating material to be passed from the coating material supply unit to the coating material collection unit; And

And a pressing roll disposed on the other surface of the coating body and adapted to press the guide roll,

The diameter of both end portions in the direction of the rotational axis of the guide roll is larger than the diameter of the center portion in the rotational axis direction,

Wherein the pressure roll is two rolls provided so as to correspond to both ends of the guide roll in the rotational axis direction or one roll whose diameters at both ends in the rotational axis direction of the pressing roll are larger than the diameter of the central portion in the rotational axis direction .

The coating apparatus of one embodiment of the present invention has the advantage of being capable of two-sided printing with a simple process.

The coating apparatus of one embodiment of the present invention is advantageous in that there is little deformation such as wrinkles and creases of the coating material.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an illustration of a section of a guide roll in one embodiment of the present specification.
Fig. 2 shows a dumbbell-shaped guide roll in one embodiment of the present invention.
Fig. 3 is a schematic view showing how the coating material moves using a dumbbell-shaped guide roll in one embodiment of the present invention.
Figs. 4 and 5 show the deformation of the coated body when the comparative example 1 is used.
6 and 7 show the deformation of the coated body when the embodiment 1 is used.
Fig. 8 is a graph showing normalization of the degree of deformation of a coating material when Example 1 and Comparative Example 1 are used. Fig.
Fig. 9 is an example of a cortical portion in one embodiment of the present invention.

Hereinafter, the present invention will be described in detail.

The present invention provides a coating apparatus comprising a coating material supply unit, a coating material collection unit, a guide roll, and a pressure roll.

The material to be coated and the material to be coated can be recovered and recovered, provided that the material to be coated is not limited to the structure, material, shape, and the like, and those generally used in the art can be employed.

In one embodiment of the present invention, the coating material dispensing portion and the coating material collecting portion can continuously supply the coating material. For example, the coating material dispensing portion and the coating material dispensing portion are each an unwinder and a coating material rewinder, and the coating material winding portion and the coating material winding portion are continuously And the coating material can be continuously supplied by rotating.

In one embodiment of the present invention, the coating material supply unit and the coating material collecting unit can intermittently and continuously supply the coating material. In this case, the intermittent continuous means that the coating material is supplied while repeating the supply of the coating material at a time interval for a while for a while and continuously supplying the coating material. For example, when the coating material is supplied to the coating area, the coating material is continuously supplied, and when the coating material is coated, the supply of the coating material can be stopped for precise coating.

The material to be coated is not particularly limited as long as it can be moved by a roll, and may include, for example, a flexible material such as plastic.

In the present specification, the guide roll may be provided on at least one of the one surface and the other surface of the coating material which proceeds from the coating material supply unit to the coating material collection unit.

According to one embodiment of the present invention, the guide roll may be provided in two or more, and the guide roll may be moved from the coating material supplying unit to the coating material collecting unit according to the traveling direction of the coating material and the coating process And may be randomly provided on one surface and the other surface of the coated body. For example, the guide rolls may be provided alternately on one side and the other side of the coated body, or two or more guide rolls may be provided on the same side of one side or the other side of the coated body.

In one embodiment of the present invention, the guide rolls may be alternately disposed on one surface and the other surface of the coated body that proceeds to the coated body collecting portion and may be provided as shown in FIG.

Wherein the diameter of the both ends of the guide roll in the direction of the axis of rotation is larger than the diameter of the center in the direction of the axis of rotation.

The shape of the guide roll is not particularly limited as long as both ends in the direction of the axis of rotation are larger than the diameter of the center in the direction of the axis of rotation.

1 (a), the guide roll is formed such that the diameter D1 of the roll central portion A from the roll central portion A to the both end portions B of the roll is larger than the diameter D2 of the roll end portions B As shown in Fig. Concretely, it is preferable that the rolls are continuously formed while forming a concave curved surface or a convex curved surface from the roll central portion A to the both end portions B of the rolls, or continuously formed from the roll central portion A to both end portions B of the rolls, . ≪ / RTI >

1 (b), the guide roll has a diameter ranging from the roll central portion A to a specific position C between the roll central portion A and the roll end portions B, A and the diameter D1 at the specific position C, and continuously increases from the specific position C to both ends B of the roll. Concretely, it is preferable to form a continuous or continuous convex curved surface from the specific position C to the both end portions B of the rolls, or to continuously form a convex curved surface while forming a constant inclined surface from the specific position C to the both end portions B . ≪ / RTI >

1 (c), the guide roll has the same diameter as the diameter D1 of the roll central portion A from the roll central portion A to the specific position C, The diameter of the roll from the upstream end C to the roll end B can be made equal to the diameter D2 of both ends B of the roll larger than the diameter D1 of the roll center A. [ At this time, the guide roll may have the form shown in FIG. 2, and such a guide roll may be called a dumbbell type guide roll.

The ratio of the diameter D2 of both end portions B of the rolls may be 1: 1.5 or more and 1: 5 or less based on the diameter D1 of the roll central portion A of the guide roll in this embodiment, Specifically, it may be 1: 1.5 or more and 1: 3 or less.

In one embodiment of the present invention, the length of the guide roll in the direction of the axis of rotation may be equal to or greater than the width of the material to be coated.

In one embodiment of the present invention, since the diameter of the both ends of the guide roll in the direction of the axis of rotation is larger than the diameter of the center of the axis of rotation in the direction of the axis of rotation, Or a portion having the same diameter as that of both ends in the direction of the axis of rotation. Specifically, the coating material passing through the guide rolls is in contact with only the portions of both ends of the guide roll in the direction of the rotation axis or both ends in the direction of the axis of rotation, and in the portion having a diameter smaller than the diameter of both ends in the direction of the rotation axis of the guide roll, It may not come into contact with the sieve. At this time, since the coating material is applied with a tensile force to the coated body by a portion having the same diameter as both ends in the direction of the rotation axis of the guide roll or both ends in the direction of the axis of rotation of the guide roll and a press roll described later, The coated body can be spaced apart from a portion having a small diameter.

The coating apparatus of the present invention includes a press roll, which is located on the opposite side of the surface of the coated member on which the guide roll is guided, and can be provided to press the guide roll. Specifically, the pressing roll can pressurize the guide roll at a position corresponding to the both ends of the guide roll in the direction of the rotational axis or the both ends of the both ends in the rotational axis direction.

In one embodiment of the present invention, the pressing roll may be two or more rolls provided so as to correspond to both ends of the guide roll in the rotational axis direction. And may be two rolls respectively corresponding to both ends of the guide roll in the rotational axis direction. At this time, the diameter of the pressure roll may be the same.

In one embodiment of the present invention, the diameter of both ends of the pressing roll in the direction of the axis of rotation may be one roll larger than the diameter of the center in the direction of the axis of rotation. At this time, the form of the pressure roll is not particularly limited as long as both ends in the direction of the axis of rotation are larger than the diameter of the center in the direction of the axis of rotation.

When the diameters of both ends of the pressing roll in the direction of the axis of rotation are larger than the diameter of the center in the direction of the axis of rotation, the shape of the guide roll is the same as that described above with reference to Fig. When the shape of the press roll is different from that of the guide roll, the diameter D1 of the roll central portion A of the guide roll and the diameter D1 of the roll both ends B are different from each other, The difference between the diameter D1 of the roll central portion A and the diameter D2 of both end portions B of the roll can be smaller than the difference between the roll D2 and the roll D2.

The ratio of the diameter D2 of both end portions B of the rolls may be 1: 1.1 or more and 1: 5 or less based on the diameter D1 of the roll central portion A of the pressure roll, Specifically, it may be 1: 1.1 or more and 1: 3 or less.

In this specification, the coating apparatus includes a coated body moving unit including the guide roll and the pressing roll.

In the present specification, the number of the guide rolls and the press rolls is not limited, but may include one guide roll and at least one press roll at the corresponding position.

In this specification, the coating apparatus may include two or more coated member moving units.

In one embodiment of the present disclosure,

At least one first guide roll provided on one side of the coating body and a first pressing roll located on the other side of the coating body and provided at a position corresponding to the first guide roll, A mobile unit; And

At least one second guide roll provided on the other surface of the coating body and a second pressing roll located on one surface of the coating body and provided at a position corresponding to the second guide roll, Mobile unit.

In this specification, the first coating unit moving unit and the second coating unit moving unit are spaced apart from each other, alternating one another or two or more consecutive alternately.

Specifically, the first coating material transfer unit, the second coating material transfer unit, the first coating material transfer unit, and the second coating material transfer unit are alternately disposed one after another in this order,

"First coating material moving unit - first coating material moving unit - second coating material moving unit - second coating material moving unit - second coating material moving unit - first coating material moving unit" and the like Two or more consecutive and alternately can be provided.

In one embodiment of the present invention, the coating apparatus may further include a cylindrical additional guide roll provided on at least one of the one surface and the other surface of the coated body.

In one embodiment of the present invention, the apparatus may further include a coating unit provided between the coating material supply unit and the coating material collection unit. Here, the coating unit is not particularly limited as long as it can coat the coating composition on at least one of the one surface and the other surface of the coating material.

The coating unit comprising: a unit for coating one surface of a coating body; And a unit for coating the other surface of the coated body. In this case, when coating one surface and the other surface of the coated body, the unit for coating one surface of the coated body and the unit for coating the other surface of the coated body are disposed apart from each other, or a unit for coating one surface of the coated body A unit for coating the other surface of the coated body can be arranged at the same position.

In this specification, the coating composition may be variously selected depending on the application to which it is applied, and is not particularly limited as long as it can be coated on a coating material.

When a functional film is produced, the coating composition may be a composition for a functional layer. For example, when producing a barrier film, the coating composition may be a composition for a barrier layer, for example, a composition comprising a metal or a metal oxide.

In the case of producing a roll printing blanket, the coating composition may be a blanket composition, for example, a siloxane-based resin composition.

In the case of producing a color filter, the coating composition may be a resin composition comprising a binder resin and a colorant.

In one embodiment of the present disclosure, the coating material coated on the coating material may be patterned.

In one embodiment of the present invention, the coating unit may include a deposition means for depositing a coating composition on at least one of the one side and the other side of the coated body.

The deposition means may be at least one of a chemical vapor deposition means, a physical vapor deposition means, and an atomic layer deposition means.

The deposition means may include a chamber which is a space to be deposited, and the chamber may include an inlet through which the coating material flows into the chamber, and an outlet through which the coating material flows out of the chamber.

In this case, one guide roll may be provided at each of the inlet side and the outlet side of the chamber outside the chamber.

Further, in addition to the outer guide rolls provided on the inlet side and the outlet side of the chamber, one or more inner guide rolls may be further provided on at least one of the one side and the other side of the coated body in the chamber.

In one embodiment of the present invention, the coating unit may include a coating unit for applying the coating composition to at least one of the one surface and the other surface of the coating material.

For example, as shown in Fig. 9, the coater of Fig. 9 (a) and the coating composition of Fig. 9 (b) may be coated with a coating composition A bath, a comma coater in Fig. 9 (c), a doctor blade coater in Fig. 9 (d), and the like.

In one embodiment of the present invention, the coating unit may include a printing unit adapted to print on at least one of the one side and the other side of the coated body.

The printing unit may be a roll printing unit including a printing roll, or an inkjet printing unit.

The roll printing unit may be a device for gravure printing, offset printing, reverse offset printing, and the like.

In one embodiment of the present invention, the coating apparatus may further include a device for drying or curing the coating layer formed on the coating material.

In one embodiment of the present disclosure, the coating device may be for producing a barrier film to block moisture and oxygen.

In one embodiment of the present disclosure, the coating apparatus may be for producing a plastic substrate.

The coating apparatus is not particularly limited as long as it is a field in which a process of forming a coating layer or a coating pattern layer on a coated body that can be moved by a roll is required.

When coating is required on both sides of the coated body, coating and curing are performed on the other side of the coated body after completion of coating and curing on the one side of the coated body after the completion of coating and curing.

The coating apparatus of the present invention is a coating apparatus in which the guide roll is in contact with only both end portions in the width direction of the coated body, so that the coated layer is simultaneously coated on one side and the other side of the coated body, Or can be cured.

On the other hand, even when a drying or curing process of the coated coating layer is not required, the coating apparatus of the present invention has a small contact surface between the coating layer coated on the coated member and the guide roll, and does not contact the effective coating layer, There are advantages.

In the case of moving the coated body using only the guide roll of the present specification (Comparative Example 1) without the pressure roll of the present specification, deformation such as wrinkles and creases may occur as shown in FIG.

On the other hand, in the case of moving the coated body using the guide roll 100 of the present specification together with the pressing roll 200 of the present invention (Example 1), it is possible to obtain advantages of less deformation such as wrinkles and creases .

In the case of Comparative Example 1 and Example 1, the degrees of deformation of the coated body are shown in FIGS. 5 and 7, respectively. FIG. 8 shows a graph in which the displacement in the Z-axis direction at this time is normalized.

Referring to the graph of FIG. 8, it can be seen that the effect according to presence or absence of the pressure roll is confirmed, and that the Z-axis of Example 1 having the pressure roll is reduced by about 33% .

100: guide roll
200: pressure roll

Claims (12)

A coating material supply unit;
A coating material recovery unit;
A guide roll which is provided on one surface of the coating material body which advances from the coating material supply portion to the coating material collecting portion and whose both ends in the direction of the axis of rotation are larger than the diameter of the center portion in the direction of the axis of rotation;
At least two pressure rolls located on the other surface of the coating body and adapted to press the guide rolls and corresponding to both ends of the guide roll in the direction of the axis of rotation or the diameter of both ends in the direction of the axis of rotation of the pressure roll Which is one roll larger than the diameter of the press roll;
A first guide roll provided on one side of the coating body and a first pressing roll located on the other side of the coating body and provided at a position corresponding to the first guide roll, ;
At least one second guide roll provided on the other surface of the coating body and a second pressing roll located on one surface of the coating body and provided at a position corresponding to the second guide roll, A mobile unit; And
A coating unit provided between the coating material supply unit and the coating material collection unit for coating both surfaces of the coating material,
Wherein the first coated material moving unit and the second coated material moving unit are spaced apart from each other. The coating apparatus according to claim 1, wherein the coating apparatus includes two or more guide rolls. delete delete The coating apparatus according to claim 1, wherein the coating apparatus further comprises a cylindrical additional guide roll provided on at least one of the one surface and the other surface of the coated body. delete The coating apparatus according to claim 1, wherein the coating unit comprises a deposition means for depositing a coating composition on at least one of the one surface and the other surface of the coated body. The coating apparatus according to claim 7, wherein the deposition means is at least one of a chemical vapor deposition means, a physical vapor deposition means, and an atomic layer deposition means. The coating apparatus according to claim 1, wherein the coating unit includes a coating unit for coating a coating composition on at least one of the one surface and the other surface of the coating material. The coating apparatus according to claim 1, wherein the coating unit includes a printing unit adapted to print on at least one of a first side and a second side of the coated body. The coating apparatus according to claim 1, wherein the coating apparatus is for producing a barrier film for blocking moisture and oxygen. The coating apparatus according to claim 1, wherein the coating apparatus is for producing a plastic substrate.

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