JPS61195264A - Drier for part coating - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to a sheet material made of glass cloth, paper, plastic film, metal foil, etc., where the edge of the sheet material or a suitable location is approximately 1 to 50 mm in the longitudinal direction. The present invention relates to a part-coat drying device for drying a coating agent applied in a band shape (hereinafter referred to as "part-coat") with a width of .

[Prior Art and Problems] A conventional coating drying device includes a plurality of hot air discharge nozzles extending in the transverse direction of a sheet material conveying path, and blows hot air over the entire surface of the sheet material. However, while conventional coating drying equipment is suitable for drying coating agents applied to almost the entire surface of a sheet material, it is difficult to dry coating agents that have been partially coated for the following reasons. Not compliant due to That is, blowing hot air onto a non-applied area where no coating agent has been applied gives a thermal shock to the non-applied area and causes the non-applied area to change in quality. Furthermore, blowing hot air onto non-coated areas is undesirable because it causes a loss of blowing power energy and thermal energy.

[Object of the Invention] An object of the present invention is to provide a part-coat drying device that can efficiently dry a part-coated coating agent without applying thermal shock to non-coated areas.

[Structure of the Invention] The gist of the present invention is that two drying chambers extending in the sheet material feeding direction of the sheet material feeding path are arranged facing each other so as to sandwich the sheet material feeding path from both sides. Each of the drying chambers is provided with a gas discharge area having a width narrower than the width of the sheet material conveying path and long in the sheet material conveying direction so as to discharge gas at an appropriate temperature toward the sheet material conveying path. In addition, a suction port is opened in the longitudinal vicinity of the gas discharge area, and the hot air discharge areas of both drying chambers are opposed to each other.

With this configuration, the hot air discharged from the gas discharge area is blown onto the part-coated area of the sheet material and then immediately sucked into the suction port, so that only the part-coated area is absorbed without giving a thermal shock to the non-coated area. It can be dried effectively.

[Explanation of Examples] Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is a perspective view showing an embodiment including two sets of part coat drying devices 1 according to the present invention.

Each part coat drying device 1 is composed of two drying chambers 2.2 facing each other with an appropriate distance W1 between them so as to sandwich the sheet material conveying path A from both sides.The drying chambers 2.2 will be described later. It is supported by a moving device 3 so that it can be moved in the width direction of the sheet material conveying path A. As shown in FIGS. 2 and 3, each drying chamber 2 includes a long main body casing 4 extending in the sheet material feeding direction of the sheet material feeding path A.
and a nozzle chamber 5 provided inside the main casing 4. The main body casing 4 has an elongated opening 4a formed on the side facing the sheet material delivery path A, and an exhaust connection port 4 at an appropriate location on the back side, etc.
b and the gas supply port 5a of the nozzle chamber 5 are opened, and the outside is further covered with a heat insulating layer 4c. The nozzle chamber 5 has a slit nozzle 5b that slightly protrudes from the center of the opening 4a of the main casing 4 and is formed long in the sheet material feeding direction B, and is provided with a rectifying plate 5c made of a perforated plate inside. Gas at an appropriate temperature is blown from the slit nozzle 5b toward the sheet material conveying path A. As shown in FIG. 2, the slit nozzles sb, sb of both drying chambers 2.2, which are arranged facing each other, are arranged at an appropriate interval W.
2 (for example, W2-5 to W2-10) are provided to face each other, and the part-coated portion of the sheet material C is stably moved approximately in the center between the two slit nozzles sb, sb. Note that the number of nozzle slits 5b is not limited to one, and although not shown, it is of course possible to arrange a plurality of nozzle slits in parallel depending on the part coat width. Further, when the part coat drying device 1 is used for drying edge ends, the amount of outside air sucked can be reduced by providing a swingable guard 34 on the outside of the drying chambers 2, 2.

As shown in FIG. 1, the moving device @3 has a meandering adjustment device 6.
Both side frames 7a of coating device @7 installed on top
, 7a, the sheet material conveyance path A is sandwiched from the outside of both ends (left and right support frames 8.8 are erected, and the left and right support frames 8.8 are rotatably horizontally suspended between the left and right support frames 8.8, The geared motor 10a and the gear box 10b are arranged so that the support rods 9, 9, 9.9, in which the screw portions 9a and 9b formed closer to each other are in a reverse screw relationship, and the four wooden support rods 9 are driven to rotate synchronously. , 10b..., transmission shaft 10c, 10
c... and a driving means 10 consisting of shaft couplings 10d, 10d..., and a threaded portion 9a of each support rod 9.

The two sets of part coat drying devices 1 are supported at their upper and lower ends via nuts 11 and 11 screwed onto 9b.
. In the illustrated embodiment, the moving device 3 is configured to move two sets of drying devices 2 synchronously, but the configuration is not limited to this, and although not shown, each drying device 2 has an independent structure. A moving device may be provided so that each drying device 2 can be moved to an arbitrary location. In addition, when the drying device 1 for part coat is installed at a fixed position, the moving device 3 is not used and the drying chambers 2, 2 may be fixed to the support frame 8.8 (not shown). .

Next, the gas supply/discharge device 12 for circulating gas at an appropriate temperature to the drying device 2.2 will be explained based on FIG. 4. The gas supply device 12 includes a circulation fan 13 and a circulation fan 13.
It consists of a heat exchanger 14 whose lower end connection port is connected to a discharge port of the heat exchanger 14, and a filter 15 disposed inside the heat exchanger 14 on the inlet side. At a suitable location on the discharge port side of the circulation fan 13,
An exhaust port 13a with a damper is opened. This exhaust port 13a connects to the drying chamber 2. shown in FIG.
The opening 37 formed between the main body casings 4.4 of 2
This is to adjust the amount of sealing air drawn from outside the drying chamber into the opening 4a of the main body casing 4 under negative pressure. As shown in FIG. 4, exhaust connection ports 4b, 4b (third An exhaust branch duct 16.17 is connected to the gas supply ports 5a, 5a (see FIG. 3), and an intake branch duct 18.19 is connected to the gas supply ports 5a, 5a (see FIG. 3).

The exhaust branch ducts 16 and 17 are communicated with each other through a duct 38, and the suction branch ducts 18 and 19 are communicated with each other through a duct 39. The exhaust branch duct 16 and the suction port of the circulation fan 13 are communicated with each other through a duct 20, and the intake branch duct 18 and the exhaust port of the heat exchanger 14 are communicated with each other through a duct 21. As shown in FIG. 1, a drying chamber 2 constituting a part coat drying device 1 located on the installation side of a moving device 3,
2 has an exhaust connection port 4b on the back side.

4b (see Figure 3) is connected to the exhaust connection duct 22.22 (
(One piece is shown) is connected to the gas supply port 5a.
, 5a (see Figure 3) is an intake connection duct 23.
23 (1WA shown) is connected. Then, the exhaust connection duct 22 (22) and the exhaust branch duct 16
(17) is communicated with the telescopic duct 24 (24),
Further, the intake connecting duct 23 (23) and the intake branch duct 18 (19) are communicated with each other through a telescopic duct 24 (24). In the illustrated embodiment, high-temperature gas is circulated through both drying chambers 2.2 constituting the drying device 1 for part coat. However, if the sheet material C is partially coated on one side and it is not preferable to supply hot air to the non-coated side of the sheet material, the drying chamber 2 facing the part coated surface side of the sheet material C Of course, it is also possible to circulate high-temperature gas only to the drying chamber 2 facing the non-coated surface of the sheet material C, and to circulate cooling gas to the drying chamber 2 facing the non-coated surface of the sheet material C.

5 and 6 show another embodiment of the part coat drying device 25 according to the present invention. Each of the drying chambers 26, 26 constituting the part coat drying device 25 includes a circulation fan 27 and a heat exchanger 28. In the nozzle chamber 29 of each drying chamber 26, a gas discharge port 29b made of a porous plate is formed on the side of the sheet material feeding path A and is formed to be elongated in the sheet material feeding direction. Each drying room 26 is connected to a duct 30 that connects the gas blown from the circulation fan 21.
The gas is supplied to the nozzle chamber 29 through the gas discharge port 2.
A part of the gas discharged from the gas discharge port 29b is circulated through the rectifying plate 31 and the heat exchanger 28 to the intake port 27a of the circulation fan 27, and a part of the gas discharged from the gas discharge port 29b is passed through the rectifying plate 32 and the exhaust port 27a. The air is sucked into an external exhaust fan (not shown) through a duct 33.

FIG. 7 shows an embodiment of still another aspect of the part coat drying device 35 according to the present invention. This part coat drying device 35 has a structure similar to that shown in FIGS. 5 and 6 above, except for the nozzle chamber 36. The nozzle chamber 36 has a long gas guide plate 36a in the sheet material feeding direction B.
, a curved Coanda part 36b continuously formed on one side edge of the gas guide plate 36a, and a slit nozzle 36C opened at the base of the Coanda part 36, and the gas discharged from the slit nozzle 36c is transferred to the Coanda part. After being diverted in the transverse direction to the sheet material conveying path at 36b, the gas is moved in the direction of arrow E along the gas guide plate 36a. This drying device 35 for part coating has a gas flow discharged from a slit nozzle 36c that is connected to a gas guide plate 36.
As the sheet material C moves in the direction of the arrow E guided by a, the gas flow pulls the sheet material C toward the edge. Therefore, part coat drying devices 35.
35, both edge ends of the sheet material C are pulled outward, making it possible to prevent wrinkles in the sheet material C, especially for thin paper.

Ideal for plastic films.

[Function] Next, the function of the drying device for part coat according to the present invention will be explained as follows.
A description will be given based on an example in which a coating agent part-coated on both sides near the edge of a sheet material C shown in FIG. 1.2 is dried in part-coat drying devices 1, 1. A coating agent is applied to both ends of the sheet material C moving through the sheet material delivery path A by a coating means (not shown) of the coating device 7.

The coating agent applied to both edge portions of the sheet material C is dried while passing through the gap between the opposing drying chambers 2, 2 of each part coat drying device 1. That is, as shown in FIG. 2, the high temperature gas discharged from the nozzle slits 5b, 5b of the drying chamber 2.2 is ejected toward the coating agent on the sheet material C, and immediately after colliding with the coating agent, each nozzle It is sucked into the suction opening 4a between the chamber 5 and the main casing 4. Further, sealing air is sucked from outside the drying chamber into the suction opening 4a of the main body casing 4 under negative pressure through an opening 37 formed between the main casings 4, 4 of the opposing drying chamber 2.degree.

[Effects of the Invention] As detailed above, the part coat drying device according to the present invention has the following excellent effects.

- A long gas discharge area in the sheet material conveyance direction is provided to discharge gas at an appropriate temperature toward the sheet material conveyance path, and a suction port is provided near the longitudinal side of the gas discharge area. It becomes possible to dry the coating agent by blowing out high-temperature gas only to the part-coated areas, and it is possible to stabilize the quality of the non-coated areas without giving thermal shock to the non-coated areas.

(2) Since it is possible to eject high temperature gas only to the part-coated area, the efficiency of blowing power energy and thermal energy can be improved compared to conventional methods.

■ Since the gas discharge areas are facing each other so as to sandwich the sheet material delivery path from both sides, it is possible to maintain stable sheet material delivery without flapping, and there is no need to let the coating agent come into contact with the nozzle, thereby eliminating scratches. It is possible to obtain a dry surface of the coating material without any scratches.

■ Since the suction port is provided near the longitudinal side of the gas discharge area, a good working environment can be maintained without allowing hot air and dust generated during drying to leak to the non-coated surface of the sheet material.

[Brief explanation of the drawing]

The drawings all show an embodiment of the drying device for part coat according to the present invention, and FIG. 1 is a perspective view of the whole as viewed from the side where the moving device is installed, and FIG. 2 is a cross section across the main body of the drying device. Figure 3 is a vertical cross-sectional view of the drying chamber, Figure 4 is a partial perspective view viewed from the side where the gas supply and exhaust device is installed, and Figure 5 is a vertical sectional view of the drying chamber.
The figure is a sectional view taken across the main body of the drying device in an embodiment of another aspect, FIG. 6 is a sectional view taken longitudinally of the drying chamber constituting the main body of the same drying device, and FIG. 7 is a sectional view of the drying device in another embodiment. FIG. 3 is a sectional view taken across the main body. A... Sheet material feeding path B... Sheet material feeding direction C... Sheet material 1 (25, 35)... Part coat drying device 2... Drying chamber 3... Moving device 4 a 91. Suction opening 5 (29, 36)
・・・Nozzle chamber

Claims (1)

[Claims] 1. 2 extending in the sheet material feeding direction of the sheet material feeding path
Two drying chambers are arranged opposite to each other so as to sandwich the sheet material feeding path from both sides, and each drying chamber has a width narrower than the width of the sheet material feeding path and is longer in the sheet material feeding direction. A gas discharge area is provided to discharge gas at an appropriate temperature toward the sheet material conveyance path, and a suction port is provided near the longitudinal side of the gas discharge area, so that the gas discharge areas of both drying chambers are connected to each other. A part-coat drying device characterized by facing each other. 2. The part coat drying device according to claim 1, wherein both the drying chambers are movable in the width direction of the sheet material conveying path.