JP2003300004A - Drying apparatus for coating - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drying apparatus for coating in which heat efficiency is improved and the drying of a coating agent is accelerated by previously heating air to be blown on the coating liquid by a blowing means using the heat radiation of a drying furnace and the air is heated in this way at a low cost without the consumption of power. <P>SOLUTION: The drying apparatus for coating is provided with a heating means 11 for previously heating the air to be blown to the coating agent 5 by the blowing means 9 using the heat radiation of the drying furnace 6. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating dryer, and more particularly, it is suitable for drying a coating agent applied on a substrate by blowing air on the coating agent. The present invention relates to a coating drying device.

[0002]

2. Description of the Related Art Conventionally, as a means for forming various coating layers on a resin film, which is generally referred to as a web, or a long base material such as paper, cloth or metal foil, a coating such as a die coater is used. Engineering equipment has been adopted.

In such a coating apparatus, the base material is successively transported to a coating position by a plurality of roller-shaped transporting means, and the surface of the base material is coated by a coating means such as a die coater head at the coating position. After applying the working material, the base material is conveyed into a drying furnace, and the coating material applied to the base material is heated and dried and solidified by a heater such as a far infrared heater or a panel heater.

Further, the drying furnace is provided with a spraying means such as a blower for spraying air onto the coating material on the base material, and the spraying means together with the heater apply the coating material on the base material. The agent is designed to dry.

[0005]

By the way, it is desirable that the air blown onto the coating material by the spraying means has a high temperature to some extent from the viewpoint of promoting the drying of the coating material.

On the other hand, the temperature of the heater is raised in order to accelerate the drying of the coating material, or a special heating means accompanied with power consumption is provided in order to heat the air blown on the coating material. Causes a problem such as an increase in cost.

The present invention has been made in view of the above problems, and improves the thermal efficiency by heating the air blown on the coating material by the spraying means in advance by utilizing the heat radiation of the drying oven. It is an object of the present invention to provide a coating drying apparatus that can accelerate the drying of a working material and can realize such heating of air at low cost without power consumption.

[0008]

In order to achieve the above-mentioned object, a coating drying apparatus according to claim 1 of the present invention is characterized in that a heater for heating and drying a coating agent applied on a substrate is a drying oven. In a coating drying device provided inside, which is provided with a spraying means for drying the coating agent by spraying air against the coating agent, the air sprayed on the coating agent by the spraying means, The point is that a heating means for heating by utilizing heat radiation of the drying furnace is provided in advance.

By adopting such a structure, it is possible to heat the air blown to the blowing means by utilizing the heat radiation of the drying furnace.

The features of the coating drying apparatus according to claim 2 are:
In Claim 1, the said heating means has the point which has the flow path part for heating which makes the said air flow along the said drying furnace upstream of the said blowing means in the flow path of the said air.

By adopting such a structure, the air flowing in the heating flow passage can be easily heated by the heat radiation of the drying furnace.

The features of the coating drying apparatus according to claim 3 are:
In the second aspect, the heating flow path portion is provided on the downstream side in the air blowing direction with respect to the base material in the drying furnace.

By adopting such a constitution, the air can be heated by utilizing the waste heat of the drying furnace, that is, the sensible heat of the air after being used for drying the coating material. Therefore, the thermal efficiency can be further improved.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a coating drying apparatus according to the present invention will be described below with reference to FIGS. 1 to 4.

As shown in FIGS. 1 and 2, the coating drying apparatus 1 according to the present embodiment has a storage box 3 supported by a plurality of casters 2, and the upper side of the storage box 3 in the storage box 3. A drying furnace 6 for heating and drying the coating material 5 applied on the base material 4 is disposed in the portion.

A heater 8 for far infrared rays, for example, is arranged in the drying furnace 6, and the heater 8 is based on the coating material 5 on the substrate 4 carried into the drying furnace 6. The material 4 is heated from below. The heater 8 may be, for example, a sheath heater.

A blowing means 9 such as a blower is connected to the bottom wall portion of the drying furnace 6, and the blowing means 9 blows air from below onto the coating material 5 on the base material 4. The coating material 5 is dried by spraying.

The air sprayed on the coating material 5 by the spraying means 9 rises in the drying furnace 6 and is exhausted to the outside of the drying furnace 6 through the exhaust pipe 10 connected to the upper wall. It has become.

The coating drying apparatus 1 in this embodiment has a heating means 11 for previously heating the air blown onto the coating agent 5 by the blowing means 9 by utilizing the heat radiation of the drying furnace 6. is doing.

That is, at a position downstream of the base material 4 in the air blowing direction to the heater 8 in the drying furnace 6, a concave portion in which a part of the outer peripheral wall of the drying furnace 6 having a substantially rectangular parallelepiped shape is closed inside. 6a is formed.

Around the outer periphery of the recess 6a, there is provided a heating flow passage 12 for allowing the air supplied to the blowing means 9 to flow along the outer periphery of the recess 6a. The heat radiation of the drying furnace 6 can be transmitted to the air flowing in the heating flow path portion 12 by means of 12.

A guide flow passage portion 13 is provided between the heating flow passage portion 12 and the blowing means 9, and the air heated by the heating flow passage portion 12 is guided by this guide passage portion 13. It is adapted to be guided to the spraying means 9 through the flow passage portion 13.

Therefore, the air heated by the heating flow path portion 12 is blown by the blowing means 9 to the substrate 4
Since it can be sprayed on the upper coating agent 5, it is possible to accelerate the drying of the coating agent 5 with a simple configuration.

The air supplied to the spraying means 9 may be, for example, the cool air used for cooling the other components (not shown) of the coating drying apparatus 1 which require cooling. Good.

Further, as shown in FIG. 1, the heating flow path portion 12 is disposed downstream of the base material 4 in the air blowing direction.

As a result, heat exchange can be performed between the air that has already been used to dry the coating material 5 on the base material 4 and the air that has flowed in the heating flow path section 12, and the drying furnace 6 waste heat can be reused. Therefore, the thermal efficiency of the coating drying apparatus 1 can be further improved.

The bottom wall and the heater 8 in the drying furnace 6
Between the heater 8 and the concave portion 6a, and between the concave portion 6a and the upper wall portion, guide plates 14a, 14b and 14c for guiding the flow direction of air are arranged.

On the lower surface of the upper wall of the drying oven 6, the drying oven 6 is
A heat insulating material 16 for maintaining the internal temperature is provided.

Next, the operation of this embodiment will be described.

In order to dry the coating agent 5 on the substrate 4 by using the coating drying apparatus 1 according to this embodiment, the coating drying apparatus 1 arranged upstream of this coating drying apparatus 1 is not shown. The base material 4 coated with the coating agent 5 on the lower surface side by means is carried into the drying furnace 6 through the carrying means (the direction perpendicular to the plane of FIG. 1)
By driving the heater 8, the coating material 5 on the base material 4 is heated and dried.

Further, by driving the spraying means 9, the air used for spraying the coating material 5 flows through the heater 8 toward the spraying means 9 side.

At this time, as shown by the arrows in FIGS. 3 and 4, the air guided to the inlet side of the blowing means 9 flows to the blowing means 9 side through the heating flow passage portion 12. However, the air passing through the inside of the heating flow passage portion 12 is used as the drying furnace 6 around which the drying flow passage portion 12 is provided.
Heat is exchanged with the air passing through the inner recessed portion 6a, that is, the air after the coating agent 5 has been dried. As a result, the air passing through the heating flow path portion 12 is heated.

The air thus heated through the heating flow passage portion 12 is guided to the inlet of the blowing means 9 through the guiding flow passage portion 13, and then the blowing means 9 is blown.
Is sprayed onto the coating material 5 on the base material 4 through the heater 8.

The air, which has been sprayed onto the coating material 5, rises in the drying oven 6 and the recess 6
In a, heat is exchanged with the air in the heating flow path portion 12, and then the temperature further rises and is discharged to the outside of the drying furnace 6 through the exhaust pipe 10.

Therefore, according to the present embodiment, heat is exchanged between the air after being sprayed on the coating agent 5 and the air flowing in the heating flow passage portion 12, thereby performing the heating operation. Since the air in the flow path portion 12 can be heated, the drying of the coating material 5 can be promoted without power consumption.

The present invention is not limited to the above-mentioned embodiment, but various modifications can be made if necessary.

[0037]

As described above, according to the coating drying apparatus of the first aspect of the present invention, it is possible to efficiently accelerate the drying of the coating agent without consuming electric power, and consequently to manufacture. The cost can be reduced.

According to the coating drying apparatus of the second aspect,
In addition to the effect of the coating drying device according to the first aspect, it is possible to accelerate the drying of the coating agent with a simpler configuration.

According to the coating dryer of claim 3,
In addition to the effect of the coating drying device according to the second aspect, the coating agent can be dried more efficiently.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of a coating drying apparatus according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a schematic side view showing the flow of air in the embodiment of the coating drying apparatus according to the present invention.

FIG. 4 is a plan view of FIG.

[Explanation of symbols]

1 Coating dryer 4 base material 5 coating agents 6 drying oven 9 Spraying means 11 Heating means 12 Heating channel 13 Guiding channel

Claims (3)

[Claims] 1. A heater for heating and drying a coating agent applied on a base material is provided in a drying furnace, and a spraying means for drying the coating agent by blowing air to the coating agent is provided. In the coating drying apparatus having, the coating drying apparatus is characterized in that it has heating means for previously heating the air blown onto the coating agent by the blowing means by utilizing heat radiation of the drying furnace. . 2. The heating means has a heating flow passage portion on the upstream side of the blowing means in a flow path of the air for flowing the air along the drying furnace. The drying device for coating according to. 3. The drying for coating according to claim 2, wherein the heating flow path portion is arranged downstream of the base material in the drying furnace in the air blowing direction. apparatus.