Drying device

Abstract

To provide a dryer capable of restraining a conveyed object from being fluttered by an air stream, which conveyed object is being conveyed in a conveying path by exhaust of air fed to dry the same.SOLUTION: The dryer is provided with a plurality of exhaust ports discharging drying gas ejected to a conveyed object being conveyed in a conveying path disposed in a drying section, which exhaust ports are each disposed outside in the width direction of the conveying path.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a drying device. [Background technology]

[0002] Patent Document 1 discloses a configuration in which hot air is introduced from above while the transported object is transported along a return transport path to dry it. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-231944 A Summary of the Invention [Problem to be solved by the invention]

[0004] According to Patent Document 1, hot air is assumed to be introduced from above the device, pass through a transport path located in the middle level, and be discharged from below, but the air current may cause the transported objects to flutter about.

[0005] An object of the present disclosure is to provide a drying device that can suppress flapping of objects transported along a transport path due to air currents by exhausting air after supplying air to dry the objects. [Means for solving the problem]

[0006] The present application discloses a drying device provided with an exhaust port for discharging drying gas sprayed toward an object transported along a transport path within a drying section, the exhaust port being positioned outside the width direction of the transport path. Effect of the Invention

[0007] According to the drying device of the present disclosure, the exhaust of the drying gas supplied for drying purposes becomes an appropriate airflow, which can prevent the objects being transported along the transport path from flapping. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram conceptually illustrating the configuration of a drying device 10. As shown in FIG. [Diagram 2] FIG. 2 is a diagram conceptually showing the configuration of the drying device 10. As shown in FIG. [Diagram 3] FIG. 3 is an enlarged view of a portion of FIG. [Figure 4] FIG. 4 is an enlarged view of a portion of FIG. [Diagram 5] FIG. 5 is an enlarged view of a portion of FIG. [Figure 6] FIG. 6 is an enlarged view of a portion of FIG. [Figure 7] FIG. 7 is a perspective view of the nozzle 23. [Figure 8] FIG. 8 is a perspective view of the exhaust plate 25. As shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] 1. Drying equipment configuration The structure of a drying device 10 according to one embodiment of the present disclosure is shown in schematic form in Figures 1 and 2. Figure 1 shows the arrangement of the components of the drying device 10 in a direction along the longitudinal direction of the transport path (the direction in which the transported object W is transported), and corresponds to the cross-sectional view taken along the line II in Figure 2. Figure 2 shows the arrangement of the components of the drying device 10 in the width direction of the transport path (the direction perpendicular to the direction in which the transported object W is transported), and corresponds to the cross-sectional view taken along the line II-II in Figure 1.

[0010] The drying device 10 of this embodiment is a device that dries a belt-shaped object W while the belt-shaped object W is conveyed along a conveying path by conveying rollers 22. The specific form of the object W is not particularly limited, but may be a battery electrode. If an electrode for a lithium ion secondary battery is taken as an example of the object W, as shown in Figs. 3 to 6 described later, the belt-shaped metal foil W 1 Coating material W on both sides 2 (Note that in Figs. 3 to 6, the metal foil W 1 Coating material W on one side of 2The coating material W is laminated. 2 is the coating material W 2 The metal foil W is dried in a drying device 10. 1 This forms a layer of active material that is bonded to the surface. Metal foil W 1 Examples of the material include metal materials constituting the positive and negative electrodes, specifically, aluminum, copper, and the like. On the other hand, coating material W 2 Examples of the material that constitutes the positive and negative electrodes include lithium nickel oxide (LiNiO 2 ), lithium manganese oxide (LiMnO 2 ), lithium cobalt oxide (LiCoO 2 and negative electrode active materials such as carbon-based materials, including amorphous carbon, non-graphitizable carbon, easily graphitizable carbon, and graphite.

[0011] 1 and 2, the drying device 10 is configured to have an air intake section 11, a drying section 21, and an exhaust section 31. Each component will be described below.

[0012] 1.1.Air supply section The air supply section 11 is a section that blows air to the drying section 21, and includes a heating section 12 and an air blowing section 13.

[0013] 1.1a. Heating section 12 The heating section 12 is a section for heating the taken-in drying gas to a temperature suitable for drying. Therefore, the heating section 12 has an air inlet 12a for taking in drying gas from the outside, and is equipped with a heating means such as a heater for adjusting the temperature of the drying gas. In this embodiment, an example will be described in which air is used as the drying gas. However, the drying gas used in this disclosure is not limited to air. For example, in cases where oxidation during drying is a problem, nitrogen or other inert gases may be used as the drying gas.

[0014] 1.1b.Blower section 13 The air blowing section 13 is a section that blows the air heated in the heating section 12 to the drying section 21. Therefore, air blowing means such as a blower is disposed in the air blowing section 13, and an air blowing port 13a that communicates with the drying section 21 and through which air from the air blowing means passes is provided. As can be seen from FIG. 1, in this embodiment, two blowing sections 13 are provided, each disposed at both ends of the longitudinal direction of the conveying path (the conveying direction of the transported object W), and each has the role of blowing air in half of the longitudinal direction of the conveying path.

[0015] 1.2.Drying section The drying section 21 is a section in which the transported object W is introduced inside and transported along the transport path while blowing air from the blower section 13 onto the transported object W to dry the transported object W. 1 Coating material W laminated on 2 Dry. The drying section 21 includes a transport roller 22 , a nozzle 23 , a pipe 24 , and an exhaust plate 25 .

[0016] 1.2a.Transport roller The conveying rollers 22 are rollers that rotate in contact with the transported object W so that the transported object W is transported along the transport path, and a plurality of conveying rollers 22 are arranged at predetermined intervals along the transport path inside the drying section 21. The specific aspects of the conveying rollers 22 and their arrangement are not particularly limited and are as known in the art. The "conveying path" is the route along which the transported object W passes, and the width of the conveying path varies depending on the width of the transported object W, but its maximum width is determined by the length of the conveying rollers 22 (the length in the direction along the rotation axis, L in FIG. 2). In other words, the maximum value of the width of the conveying path is the length of the conveying rollers 22. Here, the "width of the conveying path" will be described as the length of the conveying rollers 22.

[0017] In this embodiment, as can be seen from Fig. 1, the multiple conveying rollers 22 are arranged to form a conveying path along which the conveyed object W is conveyed by turning back in the vertical direction. In this embodiment, the object W is turned back in three stages. Fig. 3 shows an enlarged view of the portion indicated by III in Fig. 1, Fig. 4 shows an enlarged view of the portion indicated by IV in Fig. 2, Fig. 5 shows an enlarged view of the portion indicated by V in Fig. 1, and Fig. 6 shows an enlarged view of the portion indicated by VI in Fig. 2. In this embodiment, the sheet is folded back into three layers as described above. In the first layer, which is the top layer, and the third layer, which is the bottom layer, the metal foil W is laid on the conveying roller 22 as shown in FIG. 1 The coating material W is applied on top of it. 2 On the other hand, in the second stage, the metal foil W is placed under the conveying roller 22 as shown in FIG. 1 is placed so that it comes into contact with the 2 will be placed.

[0018] 1.2b.Nozzle The nozzle 23 is disposed opposite the transported object W, and is a member that injects air from the air supply section 11 toward the transported object W. Fig. 7 shows an external perspective view of the nozzle 23. Fig. 7 is a view from a viewpoint showing the side facing the transported object W. Figs. 3 and 5 also show cross sections of the nozzle 23 along the transport path (along a direction parallel to the transport direction of the transported object W). 7, the nozzle 23 is a rectangular box-shaped member, and has an outlet 23a for blowing out air introduced into the inside from the pipe 24. In this embodiment, the outlet 23a is a slit extending in the width direction of the transport path (the width direction of the transported object W). 3 and 5, in this embodiment, air is sprayed onto the transported object W from the air outlet 23a so as to be inclined toward the upstream side in the transport direction. This allows the sprayed air to form a counter flow against the transport direction, enabling efficient drying.

[0019] In this embodiment, the nozzle 23 is disposed at a position opposite the conveying roller 22 across the conveying path (conveyed object W). This allows the air jet from the nozzle 23 to press the conveyed object W against the conveying roller 22, thereby maintaining the conveying position of the conveyed object W and improving conveying stability. In this embodiment, the transported object W is transported in three vertical stages in the drying section 21 as described above, so that in the first and third stages, as shown in Fig. 3, air is sprayed downward from the nozzle 23 to press the transported object W against the transport rollers 22. On the other hand, in the second stage, as shown in Fig. 5, air is sprayed upward from the nozzle 23 to press the transported object W against the transport rollers 22.

[0020] 1.2c. Piping The piping 24 connects the nozzle 23 to the air blowing port 13a provided in the air blowing section 13 of the supply section 11, and sends air from the supply section 11 to the nozzle 23. For ease of viewing, the piping 24 is shown by a dotted line in Figures 1 and 2. The specific embodiment of the pipe 24 is not particularly limited, and any known pipe can be used.

[0021] 1.2d. Exhaust plate The exhaust plate 25 is a plate-like member that is disposed at the boundary between the drying section 21 and the exhaust section 31 so as to separate the drying section 21 from the exhaust section 31, and has a function of regulating the airflow within the drying section 21. Fig. 8 is a perspective view of a part of the exhaust plate 25.

[0022] As can be seen from FIGS. 1, 2 and 8, exhaust plate 25 has a plurality of exhaust ports 25a provided in main body 26, and exhaust air is discharged from drying section 21 to exhaust section 31 through exhaust ports 25a.

[0023] As can be seen from Figs. 2 and 8, the exhaust ports 25a are arranged at both ends of the body 25 of the exhaust plate 26 in the width direction of the transport path, at predetermined intervals in the longitudinal direction of the transport path. The widthwise interval of the exhaust ports 25a indicated by G in Figs. 2 and 8 is not strictly limited, but is preferably the same as or larger than the width of the conveying path (i.e., it is preferably the same as or larger than the length of the conveying roller 22 indicated by L in Fig. 2). It is more preferable that the exhaust ports 25a are disposed so that the entire width of the conveying path is included within the range of the interval indicated by G. In other words, the exhaust ports 25a are positioned on the outer side of the conveying path in the width direction. It is also more preferable that no other holes are provided between the Gs. By arranging the exhaust port 25a in this manner, it is possible to suppress the occurrence of eddies or entrainment from the edges of the transported object W moving along the transport path before the air flows into the exhaust section 31 after drying the transported object W, thereby suppressing flapping of the transported object W.

[0024] On the other hand, the arrangement of the exhaust ports 25a in the direction along the longitudinal direction of the transport path is not particularly limited, but the openings of the exhaust ports 25a located close to directly below the nozzle 23 can be made small, and the openings of the exhaust ports 25a located away from the nozzle 23 can be made large by comparison. This makes it possible to equalize the exhaust and further reduce turbulence in the air flow.

[0025] 1.2e. Drying section In this embodiment, as shown in Fig. 1, the conveying path is turned up and down in three stages in the drying section 21, and the conveyed object W is conveyed along this path. In this embodiment, as shown in Fig. 2, first and second three-stage turn-back conveying paths are arranged in the width direction of the conveying path. The first three-stage turn-back conveying path conveys the metal foil W. 1 Coating material W placed on one side of 2 The second three-stage return conveying path is for drying the metal foil W 1 Coating material W on one side of 2 The metal foil W of the transported goods is laminated 1 The coating material W placed on the other side of 2 Therefore, the conveyed object W that has left the first three-stage return conveying path is inverted and coated with a coating material before entering the second three-stage return conveying path. The inversion and coating are performed by known devices and methods. This results in the metal foil W 1 Coating material W on both sides 2 These become the stacked transported goods W. The basic concept of the first three-stage turn-back conveying path and the second three-stage turn-back conveying path is the same as that described above.

[0026] 1.3.Exhaust section The exhaust section 31 is a section that exhausts exhaust air from the drying section 21 through the exhaust plate 25. The specific embodiment of the exhaust section 31 is not particularly limited, and any known embodiment can be applied.

[0027] 2. Flow of drying gas (air) The drying device 10 described above operates as follows. In the drying section 21, the conveyed object W is conveyed along a conveying path by conveying rollers 22. Meanwhile, a blower provided in blower section 13 of air intake section 11 is operated to allow air to flow in from air intake port 12a. The air flowing in from air intake port 12a is heated by heating section 12, enters blower section 13, flows out from air outlet 13a, and flows into drying section 21.

[0028] In the drying section 21, air is distributed to each nozzle 23 by a pipe 24 connected to the air outlet 13a, and the coating material W of the transported object W is sprayed from each nozzle 23. 2 Air is sprayed toward the coating material W 2 As described above, in this embodiment, in the first and third stages, as shown in Fig. 3, air is jetted downward from the nozzle 23 to press the transported object W against the transport roller 22. On the other hand, in the second stage, as shown in Fig. 5, air is jetted upward from the nozzle 23 to press the transported object W against the transport roller 22. In this way, the air jetted from the nozzle 23 presses the transported object W against the transport roller 22, so that the transport posture of the transported object W can be maintained and the transport stability can be improved.

[0029] 2, 4 and 6, the air sprayed from the nozzles 23 to dry the transported object W flows out from both sides in the width direction of the transported object W (width direction of the transport path) and flows toward the exhaust section 31. Since the exhaust plate 25 is provided between the drying section 21 and the exhaust section 31, the exhaust air passes through the exhaust port 25a of the exhaust plate 25, reaches the exhaust section 31, and is exhausted.

[0030] In this embodiment, as shown in Fig. 2 and Fig. 8, the exhaust ports 25a are arranged at a predetermined interval in the longitudinal direction of the transport path (longitudinal direction of the transported object W) on both ends of the width direction of the transport path (width direction of the transported object W) of the main body 26 of the exhaust plate 25. The widthwise interval of the exhaust ports 25a shown by G in Fig. 2 and Fig. 8 is formed to be equal to or larger than the width of the transport path, or the exhaust ports 25a are arranged so that the entire width of the transport path is included within the range of the interval shown by G, and the exhaust ports 25a are located outside the width direction of the transport path, so that it is possible to suppress the entrainment or generation of a vortex from the edge of the transported object W moving along the transport path until the air flows into the exhaust section 31 after drying the transported object W, and thus it is possible to suppress the flapping of the transported object W. [Explanation of symbols]

[0031] 10 Drying equipment 11 Air supply section 21 Drying section 22 Transport roller 23 Nozzle 25 Exhaust plate 25a Exhaust port 31 Exhaust section

Claims

[Claim 1] A drying device in which a belt-shaped material is conveyed by sequentially moving a plurality of conveying rollers arranged in a conveying direction, a nozzle for spraying a drying gas onto the transported object on the opposite side to the transport roller with the transported object interposed therebetween; An exhaust section is provided below the nozzle at the bottom of the drying device, The exhaust section is provided with exhaust ports located on the outer side of the belt-shaped transported object in a width direction at intervals equal to or greater than the width of the belt-shaped transported object, a plurality of the exhaust ports are arranged in the transport direction, and an opening of the exhaust port directly below the nozzle in the arrangement direction is smaller than an opening of the exhaust port away from directly below the nozzle; drying equipment.

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