KR20180102376A - Drying device for film making - Google Patents

Abstract

The present invention provides a drying apparatus for film manufacturing to adjust a moisture ratio. According to the present invention, the drying apparatus for film manufacturing comprises: a drying unit having a structure of stacking a plurality of box-shaped drying ovens having a space part formed therein, wherein a film drying and transferring hole is formed on front and rear walls facing each other in each drying oven to allow a film to be passed therethrough; a heating plate installed on the inside of each drying oven and drying the film while radiating infrared rays to the film passing through the drying oven; a moisture adjustment oven coupled and installed to the bottom of the drying oven, and having a box shape with a space part formed therein, wherein a film moisturizing and transferring hole is formed on front and rear walls facing each other to allow the film dried in the drying oven to be passed therethrough; a moisture supply unit connected and installed to the moisture adjustment oven and adjusting the moisture ratio of the film passing through the moisture adjustment oven while supplying air including moisture into the moisture adjustment oven; a discharge duct coupled and installed to the inside of the drying and moisture adjustment ovens perpendicular to a transfer direction of the film to outwardly discharge the air inside the drying and moisture adjustment ovens, and having a discharge slit formed therein; and a guide roller installed on the inner, front, and rear walls of the drying and moisture adjustment oven, and guiding the film to be moved in a zigzag type in a direction from the uppermost drying oven to the moisture adjustment oven.

Description

[0001] Drying device for film making [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying apparatus for producing a film, which removes moisture of the film during the production process of the film.

Generally, a polarizing plate used in an image display apparatus including a liquid crystal display (LCD) normally uses a polyvinyl alcohol (PVA) film. Such a polyvinyl alcohol film is obtained by adding a polyvinyl alcohol resin It is melted and applied to a casting drum, and then the water is dried to complete the film.

At this time, the drying apparatus used for drying the film is performed while spraying the hot air at the hot air discharge port inside the drying furnace. At this time, the inside of the drying furnace is curved in the conveying path of the dry film through the plurality of guide rolls So that the drying time of the film is increased.

However, in the conventional drying apparatus, there is a problem that the hot air blown from the hot air outlet is not uniformly transmitted to the film. That is, when the hot air for drying the film is discharged through the exhaust port on the upper surface of the drying furnace, there occurs a difference in the exhaust flow rate of the hot air for each separated position based on the exhaust port, There is a problem that can not be supported. In addition, conventionally, there is a problem that it is difficult to control the moisture content depending on the use of the film due to the difficulty of uniform drying of the film.

Such a conventional technique for film drying is disclosed in Japanese Laid-Open Patent Publication No. 2013-120256 (Mar. 17, 2013).

It is an object of the present invention to provide a film drying apparatus capable of uniform drying of a film and capable of adjusting the moisture content according to the intended use of the film.

The present invention relates to a drying unit having a structure in which a plurality of rectangular shaped box-shaped drying ovens provided with a space inside thereof are stacked, a drying unit in which a film drying oven is formed so that a film passes through opposed front side walls and rear side walls of the drying ovens, , A heating plate for drying the film while irradiating infrared rays with the film passing through the inside of the drying furnace, a square box shape having a space portion provided on the inner side of the heating unit and connected to the lower end of the drying unit, The film is connected to the humidifying and regulating furnace by means of a humidification control in which a film humidifying impingement is formed so that the film dried in the drying unit passes through the side wall and the rear wall of the humidifier, A moisture supply part for adjusting the moisture permeability of the film passing through the inside by the humidification control, And the inside of the drying furnace and the humidifying control are vertically connected to the drying direction of the film so as to discharge the inside air of the drying furnace and the inside air by the drying and the humidification control, Wherein the drying duct is provided at an inner side, a front side wall and a rear side wall of the humidification control furnace, and the drying duct in which the film is located at the uppermost stage, And a guide roller for guiding the sheet to be transported in a zigzag manner in the direction of the arrow.

In addition, the drying furnace may have an even number of laminates.

The heating plate may include an upper heating plate connected to the upper surface of the drying furnace, and a lower heating plate connected to the inner bottom surface of the drying furnace.

The exhaust duct may be disposed at a central portion of the drying furnace and a central portion of the humidification control furnace with respect to the transport direction of the film.

The plurality of exhaust slits may be spaced apart from each other in the longitudinal direction of the exhaust duct.

In addition, the exhaust duct may be connected to the exhaust control slidably slidably so as to adjust the opening degree of the exhaust slit.

The drying apparatus for producing a film according to the present invention is a drying apparatus for producing a film by disposing an exhaust duct for discharging air inside a drying furnace perpendicularly to the film transport direction during heating and drying with a heating plate while transferring a film to a drying unit comprising a plurality of drying furnaces stacked, The air discharge speed inside the drying oven is kept the same through the exhaust slit, thereby achieving uniform drying of the film. In addition, the humidification control can provide moisture necessary for the film that has been completely dried in the drying unit, so that it can have a moisture content depending on the intended use of the film.

1 is a perspective view of a drying apparatus for producing a film according to an embodiment of the present invention.
2 is a front view of a drying apparatus for producing a film according to an embodiment of the present invention.
3 is a side view of a drying apparatus for producing a film according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FIG. 1 is a perspective view of a drying apparatus for producing a film according to an embodiment of the present invention, FIG. 2 is a front view of a drying apparatus for producing a film according to an embodiment of the present invention, Fig. 1 to 3, a drying apparatus for producing a film according to an embodiment includes a drying unit 100, a heating plate 200, a humidification control furnace 300, a moisture supply unit 400, an exhaust duct 500, (600).

The drying unit 100 is a part that allows the moisture in the film 10 to be manufactured to be completely removed. The drying unit 100 includes a drying furnace 101 having a rectangular box shape and having a space for inserting the film therein. The drying furnace 101 is provided with a drying distance To increase the drying efficiency and to provide a plurality of stacks for efficient installation space. Here, the drying furnace 101 is moved in a zigzag manner through a guide roller 600 to be described later, and the upper and lower positions of the finished film discharged from the humidification control furnace 300 are positioned at the first uppermost stage of the drying furnace 101, It is preferable that an even number of films are stacked so as to maintain the same position as the top and bottom surfaces of the film to be introduced through the film.

The film transferred to the opposite side walls and the rear wall of each drying furnace 101 is allowed to flow into the space inside the drying furnace 101 and then discharged to the outside of the drying furnace 101 A film drying opening 110 is formed through which the film can pass.

A drying door 120 for opening and closing the drying furnace 101 may be rotatably hinged to the left and right walls of the drying furnace 101. The drying door 120 and the drying furnace 101 may include a claw 130 for fixing the drying door 120 to the drying furnace 101 in a fixed state. The drying door 120 may be provided with a drying window 140 formed of a transparent material so that the inside of the drying furnace 101 can be seen from outside the drying furnace 101. The drying door (120) allows the drying furnace (101) to be selectively opened while facilitating maintenance of the inside of the drying furnace (101). The drying window 140 allows the operator to easily observe the film state from the outside of the drying furnace 101 when the film is dried.

A heating plate support 150 for supporting the upper heating plate 210 and the lower heating plate 220 of the heating plate 200 to be described later in a connected state is formed on the inner upper surface portion and the bottom surface portion of each drying furnace 101 .

The heating plate 200 is installed in each drying furnace 101 to dry the film passing through the inside of the drying furnace 101 of the drying unit 100. The heating plate 200 can radiate infrared rays only to the film without heating the air inside the drying furnace 101, thereby increasing the drying efficiency of the film. At this time, the heating plate 200 includes an upper heating plate 210 and a lower heating plate 220 to simultaneously heat the upper and lower surfaces of the film. The upper heating plate 210 is fixed to a heating plate support 150 formed on the upper side of the drying furnace 101 so as to be arranged on the upper surface of the film passing through the inside of the drying furnace 101. The lower heating plate 220 is fixed to the heating plate support 150 formed on the lower side of the drying furnace 101 so as to be disposed in parallel to the bottom surface of the film passing through the inside of the drying furnace 101.

The humidification control furnace 300 is a part that allows the completely dried film through the drying unit 100 to be adjusted to a state including moisture finally required. That is, the humidification control furnace 300 controls the internal humidity through the moisture supply unit 400 to be described later, so that the film passing through the drying unit 100 can be completed in a state having a predetermined moisture content do. The humidification control furnace 300 has a rectangular box shape having a space for inserting the film therein. The humidification control furnace 300 is connected to the lower end of the drying furnace 101 disposed at the lowermost end of the drying unit 100.

In addition, the film transferred to the opposite side wall and the rear side wall of the humidification control furnace 300 flows into the space inside the humidification control furnace 300, and then discharged to the outside of the humidification control furnace 300 again (Not shown) through which the film can pass.

In addition, a humidifier 320 for opening / closing the humidification control furnace 300 may be rotatably hinged to the left and right walls of the humidification control furnace 300. The humidifier 320 and the humidification control furnace 300 may be provided with a catch (not shown) for fixing the humidifier door 320 to the humidification control furnace 300 in a fixed state have. The humidifier 320 may include a humidifier (not shown) formed of a transparent material so as to be able to see the interior of the humidification control furnace 300 from outside the humidification control furnace 300. The humidifier 320 may facilitate the maintenance of the inside of the humidification control furnace 300 while allowing the humidification control furnace 300 to be selectively opened. When the moisture content of the film is controlled, the operator can easily observe the film state from the outside of the humidification control furnace 300.

A drain port 350 is formed at a lower end of the humidification control furnace 300 to discharge water generated in the humidification control furnace 300 to the outside of the humidification control furnace 300. Reference numeral 360 denotes a heating means inserting port for inserting a heating means such as a heating coil into the humidification control furnace 300 from the outside when heating is required inside the humidification control furnace 300.

The moisture supply unit 400 supplies humid air supplied from the outside to the space inside the humidity control furnace 300. That is, the moisture supply unit 400 may supply moisture to the wet film 300 while the film completely dried through the drying unit 100 passes through the humidity control film 300 while adjusting the humidity inside the humidity control film 300 Thereby controlling the moisture content of the film so that the film to be used as a product to be produced can be manufactured. The moisture supply unit 400 is installed to be connected to the inner space of the humidification control furnace 300. That is, the moisture supply unit 400 includes a moisture supply port 410 connected to one side of the humidification control furnace 300, and a moisture supply port 410 connected to the moisture supply port 410, (Not shown) for supplying the moisture. A valve (not shown) is provided between the moisture supply tank and the moisture supply port 410 to adjust the supply amount of the moist air, and the humid air is supplied to the moisture supply port 410 (Not shown) may be connected to the inside of the humidification control furnace 300 so as to be conveyed through the humidification control furnace 300. The humidity sensor 400 senses the humidity inside the humidification control furnace 300 and adjusts the humidity inside the humidification control furnace 300 while adjusting the opening and closing degree of the valve. (Not shown).

The air in the drying furnace 101 of the drying unit 100 and the air in the humidification control furnace 300 are supplied to the outside of the drying furnace 101 and the outside of the humidifying / To guide the discharge of the gas. The exhaust duct 500 is coupled to the upper surface of the inside of the drying furnace 101 and the upper surface of the inside of the humidification control furnace 300 perpendicularly to the film conveying direction, The opposite surface of the film passing through the humidification control furnace 300 passes under the exhaust duct 500 in the same manner so that the same exhaust environment is provided for all the points of the film. In addition, when the exhaust duct 500 is installed inside the drying furnace 101 and inside the humidifying / regulating furnace 300, the exhaust duct 500 is installed at the central portion of the drying furnace 101 and the humidifying / 300, the air in the drying furnace 101 and the humidification control furnace 300 can be uniformly discharged. In one embodiment, air is discharged through one longitudinal end of the exhaust duct 500 to one side of the drying furnace 101 and one side of the humidification regulating furnace 300. However, The air may be discharged to both sides of the drying unit 101 and both sides of the humidification control furnace 300 through both ends of the exhaust duct 500 in the longitudinal direction.

The exhaust duct 500 is provided with an exhaust slit 500 extending in the longitudinal direction so as to allow the air inside the drying furnace 101 and the inside air of the humidification control furnace 300 to flow into the exhaust duct 500, 510). At this time, it is preferable that the exhaust slits 510 are formed to be spaced apart from each other by a predetermined distance in the longitudinal direction of the exhaust duct 500, but it is not limited thereto, and one exhaust slit 510 may be formed in the exhaust duct 500 But may be formed to extend in the longitudinal direction. Here, when a plurality of exhaust slits 510 are formed, an exhaust control plate 520 for controlling the degree of opening of the exhaust slit 510 may be slidably connected to the exhaust duct 500 . That is, the exhaust control plate 520 uniformly discharges air to the inside of the exhaust duct 500 through the exhaust slit 510 by adjusting the degree of opening of the exhaust control plate 520 according to the position of the exhaust slit 510 So that uniform drying of the entire surface of the film inside the drying furnace 101 or uniform moisture absorption of the entire surface of the film inside the drying furnace 300 can be achieved. The exhaust duct 500 is provided with an air speed meter (not shown) for measuring the exhaust speed of the air discharged through the exhaust slit 510 so that the operator can adjust the exhaust slit 510 So that the position of the exhaust control plate 520 can be accurately positioned so that the speed of the air discharged through the exhaust control plate 520 can be matched with the same speed.

The guide roller 600 is a roller for guiding the film to be conveyed from the drying furnace 101 of the drying unit 100 toward the humidification control furnace 300. More specifically, the guide roller 600 guides the film sequentially from the drying furnace 101 located at the uppermost position toward the humidification control furnace 300 in the downward direction, and the film is transported in a zigzag manner Guide. The guide roller 600 is rotatably connected to the inner side of the drying furnace 101, the front side wall and the rear side wall, and the inner side, the front side wall and the rear side wall of the humidification control furnace 300.

The operation of the drying apparatus for producing a film according to one embodiment will be described with reference to FIGS. 1 to 4. FIG.

First, a film to be manufactured is supplied to the drying unit 100, and the operation of completely removing the moisture in the film is performed. That is, the film is inserted into the drying furnace 101 through the film drying inlet 110 formed on the front side wall of the drying furnace 101, which is disposed at the uppermost position while being guided by the guide roller 600 And then discharged through the film drying inlet 110 formed on the rear wall of the drying furnace 101. [ The film is guided to the drying furnace 101 through the film drying inlet 110 formed on the rear wall of the drying furnace 101 while being guided by the guide roller 600 to the drying furnace 101 disposed at the lower part, And then discharged through the film drying inlet 110 formed on the front side wall of the drying furnace 101 again.

At this time, after the film is introduced into each drying furnace 101, the transferred film is dried by the infrared rays irradiated from the upper and lower heating plates 210 and 220 of the heating plate 200, The moist air in the drying furnace 101 generated while drying the film is discharged to the side of the drying furnace 101 through the exhaust slit 510 of the exhaust duct 500. At this time, each of the exhaust slits 510 maintains the same air velocity to be discharged by the exhaust control plate 520, thereby uniformly removing moisture from the entire surface of the film in the drying furnace 101 .

In this way, while the film passes through the drying furnace 101 in which a plurality of films are stacked, the film is completely removed from moisture. Then, the film is supplied to the humidification control furnace 300, . That is, the humidity control furnace 300 makes the finally discharged film have a predetermined moisture content.

More specifically, the film is guided by the guide roller 600 to the inside of the humidification regulating passage 300 through the film humidifying inlet 310 formed in the front side wall of the humidifying regulating passage 300 in the drying furnace 101, The film is absorbed moisture inside the humidification control furnace 300 in which humid air is received by the moisture supply unit 400. [ At this time, the moisture content of the film in the moisture-absorbing state may be different according to the supply amount of the humid air supplied to the humidification control furnace 300 through the moisture supply unit 400.

At this time, the humid air in the humidification control furnace 300 that supplies moisture to the film is discharged to the side of the humidification control furnace 300 through the exhaust slit 510 of the exhaust duct 500. At this time, each of the exhaust slits 510 maintains the same velocity of the air to be exhausted by the exhaust control plate 520, so that the moisture in the humidity control furnace 300 is uniformly distributed over the entire surface of the film Thereby causing absorption to occur.

As described above, in the drying apparatus for producing a film according to an embodiment, when the film is transported to the drying unit 100 having a plurality of the drying furnaces 101 stacked thereon and heated and dried by the heating plate 200, The air discharge speed of the inside of the drying furnace 101 is maintained to be the same through the exhaust slit 510, Uniform drying of the film is achieved. In addition, the humidification control furnace 300 can provide moisture required for the film that is completely dried in the drying unit 100, thereby providing a moisture content depending on the use of the film.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: drying unit 101: drying furnace
110: Film drying dispenser 120: Drying door
130, 330: Clasp 140: Dry window
150: heating plate support 200: heating plate
210: upper heating plate 220: lower heating plate
300: humidifier 310: film hammer
320: Humidity Hum. 340:
350: Drain port 400: Moisture supply part
410: Moisture supply port 500: Exhaust duct
510: exhaust slit 520: exhaust control plate
600: guide roller

Claims (6)

A drying unit having a structure in which a plurality of rectangular box-shaped drying ovens provided with a space inside thereof are laminated, film drying apertures are formed through the opposite side wall and the rear wall of each of the drying ovens so as to allow the film to pass therethrough;
A heating plate installed inside each drying furnace and drying the film while irradiating infrared rays with the film passing through the inside of the drying furnace;
A drying chamber having a rectangular box shape in which a space is formed in the inside of the drying unit, and opposed linear side walls and a rear side wall are provided with a humidification control furnace in which a film is dried to allow the film dried in the drying unit to pass therethrough, ;
A moisture supply unit connected to the humidification control furnace and capable of regulating the humidification rate of the film passing through the inside of the humidification control unit while supplying air containing moisture to the inside of the humidification control unit;
The drying furnace and the humidification control unit are vertically installed in the drying furnace and the humidification control unit so as to discharge the inside air of the drying furnace and the inside air by the humidification control to the outside by the drying furnace An exhaust duct having an exhaust slit formed therein; And
The drying furnace is provided with an inner side, a front side wall and a rear side wall of each drying furnace, an inner side, a front side wall and a rear side wall of the humidification control furnace, and the film is transported in a zigzag manner in the drying furnace And a guide roller for guiding the film. The method according to claim 1,
Wherein the drying furnace is an even number of drying apparatus. The method according to claim 1,
In the heating plate,
An upper heating plate connected to the upper surface of the drying furnace,
And a lower heating plate connected to the inner bottom surface of the drying furnace. The method according to claim 1,
Wherein the exhaust duct is disposed at a central portion of the drying furnace and at a central portion of the humidifying / regulating furnace with respect to a conveying direction of the film. The method according to claim 1,
Wherein a plurality of exhaust slits are spaced apart from each other in the longitudinal direction of the exhaust duct. The method according to claim 1 or 5,
Wherein the exhaust duct is provided with an exhaust control plate slidably connected to adjust the opening degree of the exhaust slit.

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