KR102610144B1 - Slot Die and Slit Nozzle Coating Apparatus Equipped With Heat Dissipation Structure - Google Patents

Abstract

A slot die and slit nozzle coating device equipped with a heat dissipation structure is disclosed. The coating device according to an embodiment of the present invention includes a slot die that discharges the coating liquid in a vertical direction on the surface of the coating object and a slit nozzle that discharges the coating liquid in a horizontal direction on the surface of the coating object. A coating device comprising: a heat dissipation portion mounted on one outer surface of the slot die and the slit nozzle, and formed with a plurality of heat dissipation fins spaced at regular intervals; and a heat dissipation variable part built into the coating device and detecting the temperature of the slot die and the slit nozzle in real time to change the heat dissipation fin structure of the heat dissipation part.
According to the present invention, stable operation of the slot die and slit nozzle is ensured by effectively dissipating heat generated from a slot die that discharges the coating liquid in a vertical direction to the surface of the coating object and a slit nozzle that discharges the coating liquid in a horizontal direction to the surface of the coating object. A coating device including a structure that can be provided can be provided.

Description

Slot Die and Slit Nozzle Coating Apparatus Equipped With Heat Dissipation Structure}

The present invention relates to a coating device, and more specifically, to a slot die and slit nozzle coating device equipped with a heat dissipation structure that can ensure stable operation of the coating device by effectively discharging heat energy generated during operation of the coating device.

Coating refers to replacing the air on a substrate with a liquid coating solution, and the coating process can be said to be a process of creating a liquid film of micro units or less by applying a coating solution such as a polymer solution or suspension onto the substrate through a spray nozzle.

The coating process has a very wide range of industrial applications. For example, the coating process is used in all industries, including displays such as LCD/PDP, magnetic or optical disks, exposure, high-integration circuit boards, optical fiber, etc., from general industrial to household use. It can be said to be a key field.

Recently, due to its importance, research in the field of coating is actively underway. Optimization/stability research to produce thin and precise coated products while speeding up production speed, and development of new technologies that provide functionality to coatings such as multilayer films and simultaneous double-sided coating products. , development of coating fluids with non-Newtonian characteristics to solve environmental problems, and theoretical and experimental research to derive optimal process conditions.

The coating method includes slide coating, slot coating, dip coating, roll coating, and spin coating depending on the structure and type of the coating object, coating liquid, coating thickness, etc. ), multi-layered coating, curtain coating, etc., and slot coating is currently mainly used.

At this time, in the case of slot coating or curtain coating, a spray nozzle having a slot-shaped spray port is used, and the spray nozzle includes a coating fluid inlet and a first die block having an exhaust slot space in communication with the coating fluid to disperse the coating fluid, and the first die block. A slot-type injection hole that includes a second die block coupled to one die block and maintains a constant gap to spray the coating liquid dispersed and guided from the exhaust slot space from the combination of the first and second die blocks to the outside. is formed.

However, when spraying the coating liquid through the slot-shaped injection hole 2 on the substrate 1 moving in the width direction of the injection nozzle as shown in the attached FIG. 1, the spray nozzle as described above is applied to the center of the exhaust slot space and Regarding the flow rate of the coating liquid on the outside, the corner portion of the exhaust slot space is formed as a curve, so the flow speed of the coating liquid on the outside is faster than that on the center, and accordingly, a slot-type injection port (2) communicates with the center of the exhaust slot space. ), the spraying of the coating liquid is not constant, such as stagnation, and therefore, when forming a liquid film on the substrate 1 moving in the width direction of the spray nozzle, the thickness of the liquid film is not formed uniformly. Therefore, the above-mentioned thickness non-uniformity has the disadvantage of generating unstable elements (e.g. Leakag, Bead Breakup, Ribbing, rivult, etc.).

In addition, since the conventional injection nozzle has a plurality of lips to form a slot-type injection hole with a certain area, the slot is formed in the coating bead portion formed by spraying the coating liquid between the lip portion and the substrate. Only a downstream meniscus should be formed with the mold injection hole as the center, but when the substrate moves in the width direction of the injection nozzle, an upstream meniscus is formed, and in the upstream meniscus There is a problem in that the speed of the substrate, the flow rate of the coating liquid, and the gap between the lip and the substrate become poor due to the pressure drop.

In addition, the conventional spray nozzle has no problem in the case of coating liquid with high viscosity in order to form a very thin liquid film on the substrate, but when using a coating liquid with low viscosity, the substrate is sprayed according to the change in flow rate within the exhaust slot space. There is a disadvantage in that the coating surface becomes irregular as a phenomenon called fingering occurs.

Here, fingering is a pattern that has two different patterns. One pattern is a response to a very small static contact angle (e.g. a very wet state), in which case both the top and bottom of the coating liquid flow downward, and the other pattern is a response to a very small static contact angle (e.g. a very wet state). One pattern refers to a phenomenon in which almost no downward flow is visible at the top of the liquid at a relatively large contact angle (e.g., insufficiently wet state).

One of the causes of the various problems mentioned above is heat generation.

In the case of a structure according to the prior art, the structure does not effectively dissipate heat energy generated during operation of the coating device, and thus stable operation of the coating device can be guaranteed.

Therefore, there is a need for a technology that can solve the problems caused by the prior art mentioned above.

Korean Patent Publication No. 10-1357979 (Registration date: January 24, 2014)

The purpose of the present invention is to ensure stable operation of the slot die and slit nozzle by effectively dissipating heat generated from a slot die that discharges the coating liquid in a vertical direction to the surface of the coating object and a slit nozzle that discharges the coating liquid in a horizontal direction to the surface of the coating object. The goal is to provide a coating device that includes a structure that can be guaranteed.

To achieve this purpose, a slot die and slit nozzle coating device equipped with a heat dissipation structure according to an aspect of the present invention includes a slot die that discharges a coating liquid in a direction perpendicular to the surface of the coating object and the surface of the coating object. A coating device including a slit nozzle that discharges a coating liquid in a horizontal direction, comprising: a heat dissipation portion mounted on one outer surface of the slot die and the slit nozzle and formed with a plurality of heat dissipation fins spaced at regular intervals; and a heat dissipation variable part built into the coating device and detecting the temperature of the slot die and the slit nozzle in real time to change the heat dissipation fin structure of the heat dissipation part.

In one embodiment of the present invention, the heat dissipation unit includes a heat dissipation main body portion of a block structure mounted in a structure that makes surface contact with one outer surface of the slot die and the slit nozzle and having a storage space having a predetermined thickness formed therein; A plurality of fin insertion holes are formed at regular intervals on the upper surface of the heat dissipation main body and are structured to discharge or insert heat dissipation fins; A plurality of fin winding rollers are installed in the storage space of the heat dissipation main body at regular intervals and have a structure for winding heat dissipation fins around the outer peripheral surface; and is mounted on one side of the heat dissipation unit, and provides rotational driving force to the fin winding roller, so that it is released from the fin winding roller and extends the exposed length of the heat dissipating fin through the fin insertion hole, or is wound around the fin winding roller through the fin insertion hole to expose the heat dissipating fin. It may be configured to include a rotation drive unit that shortens the length.

In one embodiment of the present invention, the heat dissipation fin includes a curved structure formed on one side in surface contact with the outer peripheral surface of the fin winding roller and concave in the other side direction; and a rounding structure formed at the top of the heat dissipation fin and having a radius of curvature of a predetermined size on both sides.

In one embodiment of the present invention, the heat dissipation fin is made of a thin plate material having elastic restoring force and thermal conductivity of a predetermined size, and when wound on the outer peripheral surface of the fin winding roller, the curved structure is transformed into a flat structure and at the same time, the elastic restoring force is increased. It may have a structure that is wound around the outer circumferential surface of the pin winding roller.

In one embodiment of the present invention, the heat dissipation unit includes a refrigerant supply unit mounted on one side of the coating device and supplying refrigerant to the internal storage space of the heat dissipation main body; A refrigerant flow path formed inside the heat dissipation main body and allowing the refrigerant supplied through the refrigerant supply unit to pass through a plurality of fin winding rollers and then flow to the refrigerant discharge unit; A refrigerant discharge unit mounted on one side of the coating device and discharging the refrigerant discharged through the refrigerant passage of the heat dissipation main body to the outside and transferring it to the refrigerant cooling unit; and a refrigerant cooling unit mounted on one side of the coating device, cooling the refrigerant delivered from the refrigerant discharge unit and then transferring the refrigerant to the refrigerant supply unit.

As described above, according to the slot die and slit nozzle coating device equipped with the heat dissipation structure of the present invention, the slot die discharges the coating liquid in a direction perpendicular to the surface of the coating object by providing a heat dissipation portion and a heat dissipation variable portion of a specific structure; It is possible to provide a coating device that includes a structure that can ensure stable operation of the slot die and the slit nozzle by effectively dissipating heat generated from a slit nozzle that discharges a coating liquid in a horizontal direction on the surface of the coating object.

In addition, according to the slot die and slit nozzle coating device equipped with the heat dissipation structure of the present invention, the temperature of the slot die and the slit nozzle is detected in real time by providing a heat dissipation body portion, a fin insertion port, a fin winding roller, and a rotation drive portion of a specific structure. The heat dissipation efficiency can be changed by changing the exposed extension length of the heat dissipation fin of the heat dissipation part, and heat dissipation efficiency under various conditions can be realized by selectively changing the exposed quantity of the heat dissipation fin, so it can be variably operated in various forms by adapting it to the operating environment. A slot die and slit nozzle coating device equipped with a heat dissipation structure can be provided.

In addition, according to the slot die and slit nozzle coating device equipped with the heat dissipation structure of the present invention, by further providing a refrigerant supply part, a refrigerant flow path, a refrigerant discharge part, and a refrigerant cooling part of a specific structure, the heat energy transmitted to the heat dissipation fin itself is directly transferred to the outside. It can maximize the cooling efficiency of the object cooled by the heat dissipation fin, and is equipped with a heat dissipation structure that can achieve extreme heat dissipation efficiency by simultaneously realizing the cooling effect by air cooling and the cooling effect by refrigerant. A slot die and slit nozzle coating device can be provided.

Figure 1 is a perspective view showing a coating device according to the prior art.
Figure 2 is a front view showing a coating device according to an embodiment of the present invention.
Figure 3 is a front view showing the heat dissipation part and the heat dissipation variable part of the coating device shown in Figure 2.
Figure 4 is a partial enlarged view showing the operation of the heat dissipation part and the heat dissipation variable part shown in Figure 3.
Figure 5 is a partial enlarged view showing the operation of the heat dissipation part and the heat dissipation variable part shown in Figure 3.
Figure 6 is a perspective view showing the heat dissipation fin shown in Figure 3.
Figure 7 is a schematic diagram showing a coating device according to another embodiment of the present invention.
Figure 8 is a schematic diagram showing a coating device according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Prior to this, terms and words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, but should be construed with meanings and concepts consistent with the technical idea of the present invention.

Throughout this specification, when a member is said to be located “on” another member, this includes not only cases where a member is in contact with another member, but also cases where another member exists between the two members. Throughout this specification, when a part "includes" a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary.

Figure 2 shows a front view showing a coating device according to an embodiment of the present invention.

Referring to Figure 2, according to this embodiment, by providing a heat dissipation part 110 and a heat dissipation variable part 120 of a specific structure, a slot die for discharging the coating liquid in a direction perpendicular to the surface of the coating object and the surface of the coating object are provided. It is possible to provide a coating device that includes a structure that can ensure stable operation of the slot die and the slit nozzle by effectively dissipating heat generated from a slit nozzle that discharges a coating liquid in a horizontal direction.

Hereinafter, each component constituting the coating device 100 according to this embodiment will be described in detail with reference to the drawings.

Figure 3 shows a front view showing the heat dissipation part and the heat dissipation variable part of the coating device shown in Figure 2, and Figure 4 shows a partial enlarged view showing the operation of the heat dissipation part and the heat dissipation variable part shown in Figure 3. . FIG. 5 shows a partially enlarged view showing the operation of the heat dissipation unit and the heat dissipation variable unit shown in FIG. 3. In addition, Figure 6 shows a perspective view showing the heat dissipation fin shown in Figure 3, and Figure 7 shows a schematic diagram showing a coating device according to another embodiment of the present invention.

Referring to FIGS. 2 to 7, the coating device 100 according to this embodiment includes a slot die (10) that discharges the coating liquid in a direction perpendicular to the surface of the coating object and a slot die (10) that discharges the coating liquid in a horizontal direction to the surface of the coating object. It is a configuration including a slit nozzle (20) that discharges a coating liquid, and includes a heat dissipation portion 110 and a heat dissipation variable portion 120 of a specific structure.

Specifically, the heat dissipation unit 110 of the coating device 100 according to this embodiment is a component mounted on one outer surface of the slot die 10 and the slit nozzle 20, and has a plurality of heat dissipation fins 116 at a certain level. It is a structure formed by being spaced apart.

The variable heat dissipation unit 120 of the coating device 100 according to this embodiment is a component mounted inside the coating device or the heat dissipation portion 110, and monitors the temperatures of the slot die 10 and the slit nozzle 20 in real time. It is a structure that detects and changes the structure of the heat dissipation fin 116 of the heat dissipation portion 110.

As shown in Figures 3 to 5, the heat dissipation unit 110 according to this embodiment includes a heat dissipation body part 111, a fin insertion hole 113, a fin winding roller 114, and a rotation drive part 115 of a specific structure. ) may be a configuration including.

Specifically, the heat dissipation body portion 111 of the heat dissipation portion 110 has a block structure that is mounted in surface contact with one outer surface of the slot die and the slit nozzle and has a storage space 112 with a predetermined thickness formed therein. The fin insertion openings 113 of the heat dissipation unit 110 are formed on the upper surface of the heat dissipation body 111 at regular intervals, and have a structure through which the heat dissipation fins 116 are discharged or inserted.

The fin winding roller 114 of the heat dissipation unit 110 according to this embodiment is a configuration in which a plurality of fin winding rollers 114 are installed at regular intervals in the storage space 112 of the heat dissipation main body 111, and the heat dissipation fins 116 are wound on the outer peripheral surface. This is the structure taken. At this time, the rotation drive unit 115 is a component mounted on one side of the heat dissipation unit 110, and provides a rotation drive force to the pin winding roller 114, so that it is released from the pin winding roller 114 and opens the pin insertion hole 113. The exposed length of the heat dissipating fin 116 can be extended, or the exposed length of the heat dissipating fin 116 can be shortened by being wound on the fin winding roller 114 through the fin insertion hole 113.

In this case, according to this embodiment, the temperature of the slot die and the slit nozzle is detected in real time by providing a heat dissipation body portion 111, a pin insertion hole 113, a pin winding roller 114, and a rotation drive portion 115 of a specific structure. Thus, the heat dissipation efficiency can be changed by changing the exposed extension length of the heat dissipation fin 116 of the heat dissipation part 110, and heat dissipation efficiency under various conditions can be realized by selectively changing the exposed quantity of the heat dissipation fin 116, thereby improving the operating environment. We can provide a slot die and slit nozzle coating device equipped with a heat dissipation structure that can be customized and operated in various forms.

Meanwhile, as shown in FIGS. 5 and 6, the heat dissipation fin 116 according to this embodiment may be configured to include a curved structure 116a and a rounded structure 116b of a specific structure.

Specifically, the curved structure 116a of the heat dissipation fin 116 according to this embodiment is formed on one side in surface contact with the outer peripheral surface of the fin winding roller 114, and has a concave shape toward the other side. In addition, the rounding structure 116b is formed at the top of the heat dissipation fin 116 and has a curvature radius of a predetermined size on both sides.

At this time, the heat dissipation fin 116 according to this embodiment is made of a thin plate material having elastic restoring force and thermal conductivity of a predetermined size, and when wound on the outer peripheral surface of the fin winding roller 114, the curved structure 116a is transformed into a flat structure. At the same time, it is wound around the outer peripheral surface of the pin winding roller 114 by elastic restoring force. It is the same principle as the so-called magic bracelet that is being distributed on the market.

Meanwhile, as shown in FIG. 7, the coating device 100 according to this embodiment includes a refrigerant supply unit 131, a refrigerant passage 132, a refrigerant discharge unit 133, and a refrigerant cooling unit ( 134) may be a configuration that further includes.

Specifically, the refrigerant supply unit 131 according to this embodiment is mounted on one side of the coating device and can supply refrigerant to the internal storage space 112 of the heat dissipation main body 111. At this time, the refrigerant passage 132 formed inside the heat dissipation main body 111 passes the refrigerant supplied through the refrigerant supply unit 131 through a plurality of fin winding rollers 114, and then passes the refrigerant through the refrigerant discharge unit 133. It is a structure that allows it to flow.

The refrigerant discharge unit 133 according to this embodiment is a component mounted on one side of the coating device, and discharges the refrigerant discharged through the refrigerant passage 132 of the heat dissipation main body 111 to the outside to form the refrigerant cooling unit 134. ) is a structure that is transmitted. In addition, the refrigerant cooling unit 134 is a component mounted on one side of the coating device and has a structure that cools the refrigerant delivered from the refrigerant discharge unit 133 and then delivers it to the refrigerant supply unit 131.

In this case, according to the present embodiment, by further providing a refrigerant supply part 131, a refrigerant passage 132, a refrigerant discharge part 133, and a refrigerant cooling part 134 of a specific structure, the heat transmitted to the heat dissipation fin 116 itself is further provided. Since heat energy can be discharged directly to the outside, the cooling efficiency of the object cooled by the heat dissipation fin 116 can be maximized. Furthermore, the cooling effect by air cooling and the cooling effect by refrigerant are simultaneously realized, maximizing heat dissipation efficiency. A slot die and slit nozzle coating device equipped with an achievable heat dissipation structure can be provided.

Meanwhile, Figure 8 shows a schematic diagram showing a coating device according to another embodiment of the present invention.

Referring to FIG. 8, a plurality of heat dissipation fins 116 may be wound around the fin winding roller 114 of the coating device 100 according to this embodiment.

Specifically, as shown in FIG. 8, after embedding the fin winding roller 144 adjacent to the three fin insertion openings 113, the heat dissipating fin 116 that is drawn in or discharged through the fin insertion opening 113 is guided by the fin winding guide. A winding or unwinding operation can be implemented by stably guiding the pin in the direction of the pin winding roller 144 using the roller 114a.

In some cases, it goes without saying that the quantity of heat dissipation fins 116 wound on the fin winding roller 144 can be changed and manufactured according to the designer's intention.

Additionally, two or three heat dissipation fins 116 can be mounted on one fin insertion hole 114, so that the heat dissipation fins 116 drawn out through the fin insertion hole 144 are spaced apart from each other to form a radial structure. In this case, a structure in which a plurality of heat dissipation fins 116 are discharged and extended through each fin insertion hole 114 can be implemented.

According to this embodiment including this configuration, the exposed length of the plurality of heat dissipation fins 116 is reduced by using one fin winding roller 114 using the fin winding roller 114 and the fin winding guide roller 114a of a specific structure. Since the volume of the internal storage space 112 of the heat dissipation body 111 can be significantly reduced, the volume of the entire heat dissipation part 110 can be reduced, resulting in significantly improved cooling efficiency. At the same time, it is possible to provide a coating device with a compact structure.

In the above detailed description of the present invention, only special embodiments thereof have been described. However, it should be understood that the present invention is not limited to the particular form mentioned in the detailed description, but rather is understood to include all modifications, equivalents and substitutes within the spirit and scope of the present invention as defined by the appended claims. It has to be.

That is, the present invention is not limited to the specific embodiments and descriptions described above, and various modifications may be made by anyone skilled in the art without departing from the gist of the present invention as claimed in the claims. is possible, and such modifications fall within the scope of protection of the present invention.

100: Coating device
110: Heat dissipation unit
111: Heat dissipation main body
112: Storage space
113: Pin insertion port
114: Pin winding roller
114a: Pin winding guide roller
115: Rotation drive unit
116: Heat dissipation fin
116a: Curved structure
116b: Rounding structure
120: Heat dissipation variable part
131: Refrigerant supply unit
132: Refrigerant flow path
133: Refrigerant discharge unit
134: Refrigerant cooling unit

Claims (5)

A coating device comprising a slot die that discharges the coating liquid in a vertical direction on the surface of the coating object and a slit nozzle that discharges the coating liquid in a horizontal direction on the surface of the coating object,
A heat dissipation unit 110 mounted on one outer surface of the slot die and the slit nozzle and formed with a plurality of heat dissipation fins 116 spaced at regular intervals; and
A heat dissipation variable part 120 that is built into the coating device and detects the temperature of the slot die and the slit nozzle in real time to change the structure of the heat dissipation fin 116 of the heat dissipation part 110;
A coating device comprising:
According to paragraph 1,
The heat dissipation unit 110 is,
A block-structured heat dissipation body portion (111) mounted in a structure that makes surface contact with one outer surface of the slot die and the slit nozzle and having a storage space (112) having a predetermined thickness formed therein;
A plurality of fin insertion holes 113 are formed on the upper surface of the heat dissipation body 111 at regular intervals and have a structure through which heat dissipation fins 116 are discharged or inserted;
A plurality of fin winding rollers 114 are installed in the storage space 112 of the heat dissipation main body 111 at regular intervals and have a structure that winds the heat dissipation fins 116 around the outer peripheral surface; and
It is mounted on one side of the heat dissipation unit 110 and provides rotational driving force to the fin winding roller 114, so that it is released from the fin winding roller 114 and extends the exposed length of the heat dissipation fin 116 through the fin insertion hole 113. Alternatively, a rotation drive unit 115 that is wound around the fin winding roller 114 through the fin insertion hole 113 to shorten the exposed length of the heat dissipation fin 116;
A coating device comprising:
According to paragraph 2,
The heat dissipation fin 116 is,
a curved structure 116a formed on one side in surface contact with the outer peripheral surface of the pin winding roller 114 and having a concave shape toward the other side; and
a rounding structure (116b) formed at the top of the heat dissipation fin (116) and having a radius of curvature of a predetermined size on both sides;
A coating device comprising:
According to paragraph 3,
The heat dissipation fin 116 is,
It is composed of a thin plate material that has elastic resilience and thermal conductivity of a certain size,
When wound on the outer peripheral surface of the pin winding roller 114, the curved structure (116a) is transformed into a flat structure and at the same time, the coating device is wound around the outer peripheral surface of the pin winding roller 114 by elastic restoring force.
According to paragraph 2,
The heat dissipation unit 110 is,
A refrigerant supply unit 131 mounted on one side of the coating device and supplying refrigerant to the internal storage space 112 of the heat dissipation main body 111;
A refrigerant passage 132 formed inside the heat dissipation body 111 and allowing the refrigerant supplied through the refrigerant supply unit 131 to pass through a plurality of fin winding rollers 114 and then flow to the refrigerant discharge unit 133. ;
A refrigerant discharge unit 133 that is mounted on one side of the coating device and discharges the refrigerant discharged through the refrigerant passage 132 of the heat dissipation body 111 to the outside and transfers it to the refrigerant cooling unit 134; and
A refrigerant cooling unit 134 that is mounted on one side of the coating device and cools the refrigerant delivered from the refrigerant discharge unit 133 and then delivers it to the refrigerant supply unit 131;
A coating device comprising: