JP2021032437A - Thermal treatment apparatus - Google Patents

Abstract

To provide a thermal treatment apparatus which can reduce uneven heating in a width direction of a web.SOLUTION: A thermal treatment apparatus includes a heater group 40 disposed every predetermined spacing along a transport path of a web W running in a front-back direction in a heat treatment chamber 12, and heating the web W. The heater group 40 has left and right heaters 42, 44 disposed at locations corresponding to both left and right side parts of the web W, and a central heater 46 disposed between the left and right heaters 42, 44 and disposed at a location corresponding to a central part of the web W. The central heater 46 is inclined with respect to a width direction of the web W.SELECTED DRAWING: Figure 2

Description

The present invention relates to a web heat treatment apparatus.

Long webs such as films, metal foils, cloths, and papers are brought into the heat treatment chamber and heated after being coated with a coating liquid or the like.

Japanese Unexamined Patent Publication No. 2011-106772

In the heat treatment apparatus as described above, it is necessary to heat the web uniformly in the width direction so that unevenness does not occur in the width direction.

However, when there is uneven heating in the width direction of the web, there is a problem that there is no means for adjusting the uneven heating.

Therefore, in view of the above problems, it is an object of the present invention to provide a heat treatment apparatus capable of eliminating uneven heating in the width direction of the web.

The present invention has a heat treatment chamber and a plurality of heater groups arranged at predetermined intervals along a transport path of the web traveling in the front-rear direction in the heat treatment chamber to heat the web, and each of the heaters. The group is arranged between the pair of left and right side heaters arranged in the portions corresponding to the left and right side portions of the web and the pair of left and right side heaters, and is arranged in the portion corresponding to the central portion of the web. It is a heat treatment apparatus having a central heater arranged, and at least one of the pair of left and right side heaters or the central heater is inclined with respect to the width direction of the web.

According to the present invention, since the web is heated in the left-right direction (width direction) by the pair of left and right side heaters and the center heater, it is possible to eliminate the heating unevenness in the width direction.

It is a side view of the heat treatment apparatus which shows Embodiment 1 of this invention. It is a cross-sectional view of the heat treatment apparatus, and is the state which looked at the upper part of the heat treatment apparatus. It is a block diagram of a heat treatment apparatus. It is a side view of the heat treatment apparatus of Embodiment 2. It is a cross-sectional view of the heat treatment apparatus of Embodiment 3, and is a simplified view of the state which looked at the upper part of the heat treatment apparatus. It is a cross-sectional view of the heat treatment apparatus of Embodiment 4, and is the simplified view of the state which looked at the upper part of the heat treatment apparatus. It is a cross-sectional view of the heat treatment apparatus of Embodiment 5, and is a simplified view of the state which looked at the upper part of the heat treatment apparatus. It is a cross-sectional view of the heat treatment apparatus of Embodiment 6, and is a simplified view of the state which looked at the upper part of the heat treatment apparatus.

The heat treatment apparatus 10 according to the embodiment of the present invention will be described with reference to the drawings.

Embodiment 1

The heat treatment apparatus 10 of the first embodiment will be described with reference to FIGS. 1 to 3. The heat treatment apparatus 10 of the embodiment heats and dries the coated coating liquid while running the web W in the front-rear direction. Web W includes metal foil, film, cloth, paper and the like. Further, it is assumed that the coating liquid is applied to the upper surface of the web W.

(1) Configuration of Heat Treatment Device 10 The configuration of the heat treatment device 10 will be described with reference to FIGS. 1 and 2. The rectangular parallelepiped heat treatment chamber 12 has a heat insulating structure, and the web W carry-in inlet 14 opens in the left-right direction on the front surface, and the web W carry-out outlet 16 opens in the left-right direction on the rear surface.

As shown in FIG. 1, inside the heat treatment chamber 12, the upper duct 18 is suspended above the transport path of the web W, that is, in the front-rear direction. Upper nozzles 20 are attached in parallel to the lower surface of the upper duct 18 at predetermined intervals. The upper nozzle 20 is a rectangular parallelepiped and extends along the width direction (left-right direction) of the web W, and a pair of slit-shaped upper outlets 22 are provided on the lower surface of the upper nozzle 20.

As shown in FIG. 1, an upper fan 24 and an upper heater 26 are provided at the rear portion of the ceiling surface of the heat treatment chamber 12, and the upper heater 26 is connected to the rear upper surface of the upper duct 18 by an upper connecting duct 27. .. The air taken in by the upper fan 24 is heated by the upper heater 26, passes through the upper connecting duct 27 and the upper duct 18, and hot air is blown downward from the upper outlet 22 of each upper nozzle 20.

As shown in FIG. 1, inside the heat treatment chamber 12, a lower duct 28 is provided along the lower side of the transport path of the web W, that is, in the front-rear direction. Lower nozzles 30 are attached to the upper surface of the lower duct 28 at predetermined intervals. The lower nozzle 30 is a rectangular parallelepiped and extends along the width direction (left-right direction) of the web W, and a pair of slit-shaped lower outlets 32 are provided on the upper surface of the lower nozzle 30. The positions where the lower nozzles 30 are provided are between the adjacent upper nozzles 20 and 20, and are arranged in a staggered pattern when viewed from the side surface shown in FIG.

As shown in FIG. 1, a lower fan 34 and a lower heater 36 are provided at the rear portion of the bottom surface of the heat treatment chamber 12, and the lower heater 36 is connected to the lower surface of the rear portion of the lower duct 28 via a lower connecting duct 37. .. The air taken in by the lower fan 34 is heated by the lower heater 36, passes through the lower connecting duct 37 and the lower duct 28, and hot air is blown upward from the lower outlet 32 of each lower nozzle 30.

Rolls 38 are rotatably provided below the transport path and between the lower nozzles 30. The roll 38 rotates while supporting the web W to be conveyed.

As shown in FIGS. 1 and 2, a heater group 40 is provided between the adjacent upper nozzles 20 and 20, respectively. These heater groups 40 will be described in detail later.

As shown in FIG. 1, an exhaust port 39 for hot air is provided on the upper side surface of the heat treatment chamber 12.

As shown in FIGS. 1 and 2, the temperature sensor (right) 48L, the temperature sensor (center) 48C, and the temperature sensor (right) 48R are arranged along the left-right direction (width direction) near the carry-out port 16 of the heat treatment chamber 12. It is provided and detects the temperature distribution in the left-right direction on the upper surface of the web W. The temperature sensor (right) 48L, the temperature sensor (center) 48C, and the temperature sensor (right) 48R may be collectively referred to as the temperature sensor 48.

(2) Heater group 40
Next, the heater group 40 will be described with reference to FIGS. 1 and 2.

The heater group 40 is located in the left-right portion of the web W, the left heater 42 arranged in the left portion of the web W, the right heater 44 arranged in the right portion of the web W, and the central portion of the web W in the left-right direction of the web W. It is composed of a central heater 46. The left heater 42, the right heater 44, and the center heater 46 are electric heaters, each of which can adjust the amount of heat generated, and all three are cylindrical and have the same length.

The left heater 42 and the right heater 44 are central portions between the adjacent upper nozzles 20 and 20, and are arranged along a direction orthogonal to the transport path, that is, a width direction of the web W. The central portion of the central heater 46 exists in a straight line connecting the left heater 42 and the right heater 44, and is inclined by θ1 ° with respect to the width direction of the web W. However, 0 ° <θ1 ° <90 °. Further, the right end of the left heater 42 and the left end of the center heater 46 do not come into contact with each other and are arranged so as not to overlap when viewed from the front, and the left end of the right heater 44 and the right end of the center heater 46 do not come into contact with each other. They are arranged so that they do not overlap when viewed from the front.

(3) Electrical Configuration of Heat Treatment Device 10 The electrical configuration of the heat treatment apparatus 10 will be described with reference to the block diagram of FIG. The heat treatment apparatus 10 has a control unit 50 including a computer. An upper fan 24, an upper heater 26, a lower fan 34, and a lower heater 36 are connected to the control unit 50. Further, all the left heaters 42 and all the right heaters 44 of the heater group 40 are connected, all the central heaters 46 are connected, and the temperature sensor 48 is connected.

(4) Control Method of Heat Treatment Device 10 A control method of the heat treatment device 10 will be described.

First, as shown in FIG. 1, the web W coated with the coating liquid is carried into the heat treatment chamber 12, transported on the plurality of rolls 38, and heated. Then, hot air is blown from the upper nozzle 20 and the lower nozzle 30, respectively, to further heat the left heater 42, the right heater 44, and the center heater 46 of all the heater groups 40. First, the control unit 50 heats the left heater 42, the right heater 44, and the center heater 46 with the same amount of heat. Normally, the temperature inside the heat treatment chamber 12 is 100 ° C. to 150 ° C. with only hot air, but when all the heater groups 40 are heated, the temperature rises to 300 ° C. to 400 ° C., and higher temperature heating can be performed.

Next, the control unit 50 has left and right temperature distributions based on the temperature distribution in the left-right direction of the web W detected by the temperature sensor (right) 48L, the temperature sensor (center) 48C, and the temperature sensor (right) 48R. Feedback control is performed by increasing or decreasing the calorific value of the left heater 42, the right heater 44, and the center heater 46 so as to be uniform in the direction. For example, when the temperature of the central portion of the web W is low, the calorific value of the central heater 46 is raised above the calorific value of the left heater 42 and the right heater 44. As a result, the temperature of the central portion of the web W rises and becomes uniform in the left-right direction.

In addition, when the temperature of the left portion of the web W is low, the calorific value of the left heater 42 is raised above the calorific value of the right heater 44 and the central heater 46.

(5) Effect According to the present embodiment, when the temperature distribution in the left-right direction of the web W is not uniform, the temperature of the left heater 42, the right heater 44, or the center heater 46 in the low temperature portion is raised to raise the temperature in the left-right direction. It is possible to have a uniform temperature distribution and prevent uneven heating.

Further, since the central heater 46 is provided at an angle of θ1 ° with respect to the width direction of the web W, it is possible to heat the central portion of the web W widely in the left-right direction and the front-back direction.

Further, since the left and right ends of the central heater 46 are arranged so as not to come into contact with the right end of the left heater 42 and the left end of the right heater 44 and do not overlap when viewed from the front, only a part of the web W is strongly strengthened. Does not heat.

Embodiment 2

Next, the heat treatment apparatus 10 of the second embodiment will be described with reference to FIG. In the first embodiment, in the left heater 42, the right heater 44, and the central heater 46, the calorific value of the central heater 46 is increased.

However, if it is known in advance that the heating temperature of the central portion of the web W will be lower than the heating temperature of the left and right portions, as shown in FIG. 4, only the height h2 of the central heater 46, the left heater 42, and the right The height of the heater 44 is made lower than h1 to bring it closer to the web W, and the amount of heat that hits the central portion of the web W is increased.

Embodiment 3

The third embodiment will be described with reference to FIG. In FIG. 5, the arrangement of the upper nozzle 20, the left heater 42, the right heater 44, and the center heater 46 is simplified.

In the first embodiment, among the left heater 42, the right heater 44, and the center heater 46, only the center heater 46 is tilted, and the left heater 42 and the right heater 44 are parallel to the width direction of the web W.

Instead of this, in the present embodiment, the left heater 42 and the right heater 44 are inclined symmetrically by θ2 ° with respect to the width direction of the web W, and the central heater 46 is arranged parallel to the width direction of the web W. .. However, 0 ° <θ2 ° <90 °.

Embodiment 4

The fourth embodiment will be described with reference to FIG. In FIG. 6, the arrangement of the upper nozzle 20, the left heater 42, the right heater 44, and the center heater 46 is simplified and described.

In the present embodiment, the left heater 42 and the right heater 44 are inclined by θ2 ° with respect to the width direction of the web W, and the center heater 46 is arranged parallel to the width direction of the web W. However, 0 ° <θ2 ° <90 °.

As a modification of the present embodiment, the inclination directions of the left heater 42 and the right heater 44 may be opposite to each other.

Embodiment 5

The fifth embodiment will be described with reference to FIG. In FIG. 7, the arrangement of the upper nozzle 20, the left heater 42, the right heater 44, and the center heater 46 is simplified.

In the present embodiment, the left heater 42 is arranged parallel to the width direction of the web W, and the center heater 46 and the right heater 44 are arranged so as to be inclined by θ1 ° with respect to the width direction of the web W. However, 0 ° <θ1 ° <90 °.

As a modification of the present embodiment, the right heater 44 may be arranged parallel to the width direction of the web W, and the center heater 46 and the left heater 42 may be arranged at an angle of θ1 ° with respect to the width direction of the web W.

Further, as a modification of the present embodiment, the inclination directions of the central heater 46 and the right heater 44 may be opposite to each other.

Embodiment 6

The sixth embodiment will be described with reference to FIG. In FIG. 8, the arrangement of the upper nozzle 20, the left heater 42, the right heater 44, and the center heater 46 is simplified.

In the present embodiment, the left heater 42, the center heater 46, and the right heater 44 are arranged so as to be inclined by θ3 ° with respect to the width direction of the web W. However, 0 ° <θ3 ° <90 °.

As a modification of the present embodiment, the inclination directions of the left heater 42, the center heater 46, and the right heater 44 may be opposite to each other.

Change example

Next, a modified example of the heat treatment apparatus 10 will be described.

(1) Change example 1
In the above embodiment, the web W is divided into three heaters, a left heater 42, a right heater 44, and a center heater 46, in the width direction (horizontal direction) of the web W, but five heaters may be arranged instead. For example, the left heater 42 is composed of two, the right heater 44 is composed of two, and the center heater 46 is composed of one.

(2) Change example 2
In the above embodiment, a plurality of rolls 38 for supporting the web W are provided, but the configuration may be such that the rolls 38 are not provided.

(3) Change example 3
In the above embodiment, the upper nozzle 20 and the lower nozzle 30 are provided, but the structure may be such that the lower nozzle 30 is not provided, or both the upper nozzle 20 and the lower nozzle 30 are not provided, and simply a plurality of heater groups. You may heat only 40.

(4) Change example 4
In the above embodiment, the left heater 42, the right heater 44, and the center heater 46 are electric heaters, but instead of them, a steam heater or a heat medium heater through which a heat medium such as oil flows may be used. When adjusting the temperature, the amount of steam is adjusted in the case of a steam heater, and the amount of heat medium is adjusted in the case of a heat medium heater.

(5) Others Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

10 ... Heat treatment device, 12 ... Heat treatment chamber, 20 ... Upper nozzle, 30 ... Lower nozzle, 40 ... Heater group, 42 ... Left heater, 44 ... Right heater, 46・ ・ ・ Central heater, 48 ・ ・ ・ Temperature sensor, 50 ・ ・ ・ Control unit

Claims (10)

Heat treatment room and
A plurality of heater groups arranged at predetermined intervals along the transport path of the web traveling in the front-rear direction in the heat treatment chamber to heat the web, and a group of heaters.
Have,
Each of the heater groups
A pair of left and right side heaters arranged in the portions corresponding to the left and right sides of the web,
A central heater arranged between the pair of left and right side heaters and a portion corresponding to the central portion of the web.
At least one of the pair of left and right side heaters or the central heater is inclined with respect to the width direction of the web.
Heat treatment equipment. The central heater is tilted by θ1 ° (where 0 ° <θ1 <90 °) with respect to the width direction of the web.
At least one said side heater is parallel to the width direction of the web.
The heat treatment apparatus according to claim 1. The central heater is parallel to the width direction of the web and
At least one of the side heaters is tilted by θ2 ° (where 0 ° <θ2 <90 °) with respect to the width direction of the web.
The heat treatment apparatus according to claim 1. All the side heaters and the central heater are tilted by θ3 ° (where 0 ° <θ3 <90 °) with respect to the web.
The heat treatment apparatus according to claim 1. A temperature sensor that detects the temperature of the web in the left-right direction in the heat treatment chamber,
Corresponding to the temperature in the left-right direction of the web detected by the temperature sensor, the heat generation amount of the central heater and the heat generation amount of the pair of left and right side heaters are controlled so that the temperature in the left-right direction of the web is the same. A control unit that controls feedback so that
The heat treatment apparatus according to claim 1. The pair of left and right side heaters and the central heater are electric heaters, steam heaters, or heat medium heaters.
The heat treatment apparatus according to claim 1. The position of the central heater is closer to the web than the position of the pair of left and right side heaters.
The heat treatment apparatus according to claim 1. In the heat treatment chamber, an upper nozzle for blowing hot air at predetermined intervals is provided along the transport path.
Each of the heater groups is arranged on the transport path and between the adjacent upper nozzles.
The heat treatment apparatus according to claim 1. A lower nozzle that blows hot air at predetermined intervals is also provided under the transport path.
A roll for rotationally supporting the web is provided between the adjacent lower nozzles.
The heat treatment apparatus according to claim 8. The upper nozzle and the lower nozzle are arranged in a staggered pattern.
The heat treatment apparatus according to claim 9.

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