JP6136107B2 - Drying hood and drying device - Google Patents

Description

  The present invention relates to a drying hood for flowing a gas to a coating film applied to the surface of a long film conveyed in the longitudinal direction to dry the coating film, and a drying apparatus using the same.

  Conventionally, as a method for producing a film having functions such as conductivity and optical characteristics, a coating film is formed by applying a coating agent according to the application to a long film conveyed in the longitudinal direction, It is known to dry this coating film. In this manufacturing method, in order to quickly dry the coating film, for example, in Patent Document 1, as shown in FIG. 6, the film F is covered with a cover portion 41 from one end side to the other end side in the width direction. A drying hood 40 that dries a coating film C by flowing a gas in the width direction from the opening 42a of the connecting member 42 to be connected toward the film F is disclosed.

JP 2010-94630 A

  However, in the drying hood 40 disclosed in Patent Document 1, since the gas is dispersed at the opening 42a, the film F is transported across the gas flow. As a result, the film F may be fluttered under the influence of the gas flow. As a result, the coating film C was disturbed to cause unevenness, and the coating film C could not be dried uniformly. This fluttering becomes more prominent as the film transport speed and the gas wind speed are increased, for example.

  Then, this invention was made | formed in order to solve the said subject, Comprising: The drying hood which can dry uniformly the coating film coated on the elongate film currently conveyed to the longitudinal direction, and It aims at providing the drying apparatus using this.

The object of the present invention is to flow a gas from one end of the film in the width direction to the other end of the coating film coated on the surface of the long film being transported in the longitudinal direction. A drying hood that extends from one end portion in the width direction of the film to the other end portion, and is located between the cover portion and the film at the one end portion. includes a guide portion for the said gas, toward the other end from the one end, before SL while the guide portion sneak into the back surface side of the film is prevented, the coating film and the cover portion This is accomplished with a drying hood that flows between them.

  According to such a structure, the gas which is going to wrap around to the back surface side of a film is guided to the surface side by the guide part. Thereby, since the fixed gas flow acts on the surface side of the film, fluttering of the film can be prevented. Moreover, since the gas | air volume which acts on the coating-film side increases as a result, a coating-film can be dried efficiently.

Further, in the present invention, the cover portion is formed in a U-shape opening toward the film in a cross-sectional view orthogonal to the width direction, and at the one end portion, the cover portion and the guide portion are The opening may be fixed so as to close in the longitudinal direction, and a first space through which the gas flows may be formed.

  According to such a structure, since the cover part is formed in U shape, the dispersion | distribution of the gas on a film can be prevented and gas can be made to act on a coating film uniformly.

Further, in the present invention, the one end portion is further connected to the first space, and further includes a connection member in which a second space in which the gas flows toward the first space flows, and the second space includes: It can be made to connect with the 1st space from the back side. According to such a configuration, since the gas flow is directed upward, the gas is shaped along the cover portion positioned on the upper side. Thereby, gas can be spread to the other end part of the film located far away on the opposite side.

  Furthermore, in this invention, the said connection member can be comprised so that it may have an adjustment means which adjusts the inclination with respect to the said film of the said cover part. According to this structure, it can adjust so that a cover part may incline toward a film, A gas flow can be made to act uniformly to an other end part along a cover part.

  According to the drying duct and the drying device of the present invention, it is possible to uniformly dry the coating film applied to the long film being conveyed.

It is a schematic whole figure of the manufacturing process of a coating film. It is sectional drawing of the drying apparatus with which the food | hood for drying which concerns on one Embodiment of this invention was applied. It is the III-III arrow directional view of FIG. It is a disassembled perspective view of the drying hood which concerns on one Embodiment of this invention. 1 is a perspective view of a drying hood according to an embodiment of the present invention. It is a perspective view of the conventional drying hood.

  Hereinafter, a drying hood and a drying apparatus using the same according to an embodiment of the present invention will be described with reference to the drawings. In the following description, directions such as up, down, front, back, left, and right are determined for convenience of explanation, and do not limit the direction in the implementation of the present invention.

  First, the fundamental whole structure of the manufacturing process of a coating film is demonstrated. FIG. 1 is a schematic overall view of a production process 1 of a coated film. As shown in FIG. 1, the coating film manufacturing process 1 includes an unwinding device 2 for unwinding the film F, a transport means 3 for transporting the film F, and a coating liquid applied to the surface of the film F. A coating device 4 for forming the film C, a drying device 5 for drying the coated film C, and a winding device 6 for winding the film F on which the dried coating film C is formed. A drying hood 7 according to an embodiment of the present invention is used in a drying device 5.

  The film F is not specifically limited, It selects suitably from a well-known thing according to a use. For example, polyester polymers such as polyethylene terephthalate and polyethylene naphthalate, cellulose polymers such as diacetyl cellulose and triacetyl cellulose, polycarbonate polymers, acrylic polymers such as polymethyl methacrylate, styrene such as polystyrene and acrylonitrile-styrene copolymer Examples thereof include films made of polyolefin polymers such as polyethylene polymers, polyethylene, polypropylene, cyclic polyolefins, and ethylene-propylene copolymers. From the viewpoint of strength and cost, polyethylene terephthalate is preferably used. Moreover, the thickness of the film and the length in the width direction are also appropriately selected according to the application. The thickness is, for example, 10 to 250 μm, preferably 50 to 188 μm, and the length in the width direction is, for example, 500 to 2000 mm, preferably 1000 to 1500 mm.

  The coating liquid is not particularly limited, and is appropriately selected from known ones according to applications. Examples thereof include those in which a thermosetting resin, an ultraviolet curable resin, an electron beam curable resin, or the like is dissolved in an organic solvent, or an inorganic substance is dispersed in an aqueous solvent.

  Next, each structure of the manufacturing process 1 of a coating film is demonstrated in order. The unwinding device 2 is for unwinding the film F by rotating a roll (not shown) around which the long film F is wound, and a known one is used.

  The conveying means 3 is for conveying the film F to the coating device 4, the drying device 5, and the winding device 6 in order with a predetermined tension, and is composed of, for example, a driving roller, a driven roller, a dancer roller, and the like. . The conveyance speed of the film F is set to 0.1-200 m / min, for example, Preferably it is 5-40 m / min from a viewpoint of manufacturing the coating film excellent in the external appearance efficiently.

  The coating device 4 continuously applies a coating solution to the surface of the film F to be conveyed. For example, a die coater, a roll coater, a bar coater, a knife coater, a squeeze coater, a phantom coater, a kiss coater, etc. A well-known thing is used.

  The drying device 5 is for drying the coated film C, and is configured so that the film F is conveyed therein. In FIG. 1, six drying devices 5 are arranged, but the number thereof is not particularly limited, and may be one or plural.

  The winding device 6 is for winding the film F dried from the coating film C onto a roll (not shown), and a known one is used.

  Next, the drying apparatus 5 will be described in detail. FIG. 2 is a cross-sectional view of the drying device 5. As shown in FIG. 2, the drying device 5 includes a drying device body 10 in which a carry-in port 8 and a carry-out port 9 are formed on the right side and the left side, respectively, and the film F is transported from the right side to the left side. The drying apparatus main body 10 is for heating the film F and keeping it at a constant temperature, and the internal temperature is, for example, 10 to 200 ° C. from the viewpoint of drying the coating film C uniformly and efficiently, preferably It is set to 30 to 140 ° C.

  The drying device 5 is further provided outside the drying device main body 10 and is connected to the air blowing means (not shown) for sending gas and formed inside the drying device main body 10 and connected to the air blowing means to guide the gas from the outside. A space 11 and a drying hood 7 that is provided inside the drying apparatus main body 10 and is connected to the connection space 11 at the top and allows the gas to flow through the coating film C are provided. The blower means is for sending out gas, and for example, a known blower that pumps gas is used. The gas from the blowing means passes through the openings 11 a and 11 b formed in the connection space portion 11, passes through the connection space portion 11, and is sent to each drying hood 7 from the opening 11 c formed in the connection space portion 11. It is done. Six drying hoods 7 are arranged so as to cover the surface of the film F in the width direction, and these openings are aligned to face the front side in FIG.

  The drying hood 7 will be described in detail with reference to FIGS. FIG. 3 is a view taken along the line III-III in FIG. As shown in FIG. 3, the drying hood 7 includes a connecting member 12 that is connected to the connecting space portion 11 on the right side of the film F, and a cover portion 13 that extends from the right side to the left side of the film F and covers the film F in the width direction. And a guide portion 14 located between the cover portion 13 and the film F at the right end portion. The cover portion 13 and the connecting member 12 are integrally formed, and the length in the width direction is set to, for example, 1000 to 2100 mm, preferably 1100 to 1600 mm. The guide part 14 is located so that the right end part of the film F may be covered, and the length of the width direction is set to 30-850 mm, for example, Preferably it is 50-400 mm. The guide portion 14 can prevent the gas from flowing around the back side of the film F.

  Moreover, each of the cover part 13 and the connection member 12 is being fixed to the drying apparatus main body 10 via the four fixing members 15a-15d in the near side and back | inner side of FIG. The fixing members 15a to 15d are fixed to the drying main body device 10, and are plate-like members extending upward. In the upper end portions of the fixing members 15a to 15d, elongated holes 16a to 16d that extend in the vertical direction and open are formed. Correspondingly, round holes 17a to 17d are formed in the cover portion 13 and the connecting member 12, respectively. The drying hood 7 is fixed by bolts and nuts (not shown) penetrating the long holes 16a to 16d and the round holes 17a to 17d. And a position can be adjusted with these long holes 16a to 16d, and the distance between the food | hood 7 for drying and the film F can be adjusted. From the viewpoint of drying the coating film C uniformly and efficiently, the distance therebetween is set to, for example, 1 to 30 mm, preferably 5 to 15 mm. Further, the right side height of the drying hood 7 can be adjusted to be higher than the left side height. Thereby, the cover part 13 can be inclined toward the film F, and the gas flow can be applied to the left end part of the film F. The height difference is adjusted as appropriate, but is set to, for example, 0 to 30 mm, preferably 0 to 5 mm.

  FIG. 4 is an exploded perspective view of the drying hood 7. Here, the cover part 13 and the connecting member 12 are disassembled and described. Examples of the material of the drying hood 7 include plastic and metal, but SUS is preferably used from the viewpoint of preventing dust generation.

  As shown in FIG. 4A, the cover portion 13 includes a horizontally extending plate-like cover base portion 18 and a pair of cover bent portions 19 that are bent from both side ends of the cover base portion 18 and extend downward. Thereby, the cover part 13 is formed in the cross-sectional view U-shape. Further, the aforementioned round holes 17a and 17b are formed at the front end portions of the pair of cover bent portions 19a and 19b.

  As shown in FIG. 4B, the guide portion 14 includes a horizontally extending plate-like guide base portion 20, guide upper bent portions 21a and 21b extending from both side ends of the guide base portion 20 and extending upward, and a guide base portion. 20 is provided with a guide downward bending portion 22 which is bent from the rear end of the 20 and extends downward. The guide base 20 and the guide upper bent portions 21a and 21b are formed in a U shape in a sectional view, and the guide base portion 20 and the guide lower bent portion 22 are formed in an L shape in a sectional view. The guide lower bent portion 22 is formed with two elongated holes 16e and 16f that extend in the vertical direction and are connected to the connecting member 12.

  As shown in FIG. 4C, the connecting member 12 includes a box-shaped main body portion 24 in which a second space 23 is formed, and the lower surface of the main body portion 24 coincides with the opening 11 c of the connecting space portion 11. A first opening 25 that is open in this manner is formed. A second opening 26 is formed on the front surface connected to the cover portion 13 and the guide portion 14. As a result, the gas flows from the first opening 25 to the second opening 26 through the second space 23. In addition, round holes 17 e and 17 f for connecting to the guide portion 14 are formed below the second opening portion 26 on the front surface of the main body portion 24. Further, the above-described round holes 17 c and 17 d are formed on the side surface of the main body 24.

  FIG. 5 is a perspective view of the drying hood 7. As shown in FIG. 5, the cover portion 13 and the connecting member 12 are integrally formed so that their upper surfaces coincide. And the guide part 14 is connected with the cover part 13 from the downward direction of the cover part 13 so that the U-shaped opening of the cover part 13 may be covered in a longitudinal direction. Thereby, the first space 27 through which the gas flows is formed. And the guide part 14 is fixed to the connection member 12 so that replacement | exchange is possible by the volt | bolt and nut (not shown) which penetrate the long holes 16e and 16f and the round holes 17e and 17f. For this reason, as the guide part 14, what can cover the one end part of the film F according to the magnitude | size of the film F can be selected and attached. Furthermore, fine adjustment of the action of the gas on the film F can be performed by adjusting the positions of the long holes 16e and 16f.

  The operation of the manufacturing process 1 of the coated film configured as described above will be described with reference to FIGS. 1, 2, and 5. First, as shown in FIG. 1, the long film F is unwound by the unwinding device 2 and is transported in the longitudinal direction by the transport means 3. Then, a desired coating solution is continuously applied to the surface of the film F by the coating device 4 to form a coating film C.

  Subsequently, the conveyed film F enters the inside of the drying device 5 as shown in FIG. 2 and passes below the drying hood 7 extending in the width direction. At this time, as shown in FIG. 5, the gas flows from the first opening 25 to the first space 27, and one end in the width direction of the film F passes between the cover portion 13 and the guide portion 14 of the drying hood 7. It flows from the side toward the other end. At this time, the gas passes through between the cover portion 13 and the coating film C on the film F while preventing the guide portion 14 from wrapping around the back side of the film F. Thereby, the coating film C is uniformly dried. Then, as shown in FIG. 2, the film F to be conveyed is sequentially conveyed to a plurality of drying hoods 7 and a plurality of drying devices 5, and the coating film C is reliably dried.

  Finally, the film F on which the dried coating film C is formed is wound on a roll by the winding device 6 to obtain films F for various uses having functions such as conductivity and optical characteristics. .

  As mentioned above, although one Embodiment of this invention was described, the specific aspect of this invention is not limited to the said embodiment. For example, in the said embodiment, although the connection space part 11 was located under the drying hood 7, and the gas was flowed from the downward direction, the connection space part 11 can also be located in an upper direction or a horizontal direction, and according to it. It is also possible to change the shape of the connecting member 12 so that the gas can flow from above or from the side. Moreover, in the said embodiment, although the ventilation means is provided in the exterior of the drying apparatus main body 10, the connection space part 11 can be abbreviate | omitted and it can also be directly connected with each of the drying hoods 7. FIG.

  In the above embodiment, six drying hoods 7 are arranged as shown in FIG. 2, but the number is not limited and may be one or plural. Further, the openings of all the drying hoods 7 are arranged toward the front side in FIG. 2. For example, the first is arranged on the front side and the second is arranged on the back side. It can also be configured to dry from both sides of the membrane C. By carrying out like this, the coating film C can be dried efficiently and uniformly.

  Moreover, in the said embodiment, although the cover part 13 and the guide part 14 were formed in cross-sectional view U-shape, cross-sectional view I shape, ie, a mere plate shape, cross-sectional view U shape, V shape, etc. It can also be formed. From the viewpoint of uniformly drying the coating film C in the width direction, the coating film C is preferably formed in a U shape in a sectional view. Moreover, it can be formed not only with a constant length in the longitudinal direction but also with a gradually widened or gradually narrowed one.

  Moreover, in the said embodiment, although the cover part 13 and the guide part 14 were comprised as a separate member, the structure by which the cover part 13 and the guide part 14 were shape | molded integrally may be sufficient.

  Furthermore, in the said embodiment, although the drying hood 7, the fixing member 15, and the cover part 13 and the connection member 12 were fixed with the volt | bolt and the nut, it is fixing with the screw screwed into this, changing a round hole into a screw hole. You can also.

C coating film F film 1 coating film manufacturing process 2 unwinding device 3 transport means 4 coating device 5 drying device 6 winding device 7 drying hood 8 carry-in port 9 carry-out port 10 drying device body 11 connecting space portion 11a, 11b, 11c Opening 12 Connecting member 13 Cover portion 14 Guide portions 15a, 15b, 15c, 15d Fixing members 16a, 16b, 16c, 16d, 16e, 16f Long holes 17a, 17b, 17c, 17d, 17e, 17f Round hole 18 Cover Base portions 19a and 19b Cover bent portion 20 Guide base portions 21a and 21b Guide upper bent portion 22 Guide lower bent portion 23 Second space 24 Body portion 25 First opening portion 26 Second opening portion 27 First space

Claims (5)

In a drying hood that dries a gas from one end of the film in the width direction to the other end of the film coated on the surface of the long film being conveyed in the longitudinal direction, and dries the coating There,
A cover portion extending from one end portion in the width direction of the film to the other end portion and positioned on the surface side;
In the one end portion, the guide portion located between the cover portion and the film,
The gas, the direction from the one end to the other end, before SL while the guide portion sneak into the back surface side of the film is prevented, the drying hood flowing between the coating film and the cover portion. The cover portion is formed in a U-shape opening toward the film in a cross-sectional view orthogonal to the width direction,
2. The drying hood according to claim 1, wherein at the one end portion, the cover portion and the guide portion are fixed so as to close the opening in the longitudinal direction, and a first space through which the gas flows is formed. A connecting member that is connected to the first space on the one end side and in which a second space in which the gas flows toward the first space flows;
The drying hood according to claim 2, wherein the second space is connected to the first space from the back side.   The drying hood according to claim 3, wherein the connecting member includes an adjusting unit that adjusts an inclination of the cover portion with respect to the film.   The drying apparatus containing the drying hood in any one of Claim 1 to 4, and the ventilation means connected with the said drying hood, and flowing the said gas.

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