JPH06221760A - Vertical type continuous drying device for sheet material - Google Patents

Abstract

PURPOSE:To provide a drying device wherein a change-over response against two objects can be executed in the case of an intention for raising a drying action efficiency and in the case of an intention for sustaining and raising a quality in one vertical type drying device. CONSTITUTION:At an upper and lower side in a vertical type drying treatment room 1 that executes a transportation and a sending-in of a sheet material to be treated to upward direction or a downward direction, air ventilation openings 5a, 5b are set, and these openings are made to be in communication with a circular state conduit wherein an air sending path 7a of an air sending device 7 is made to be in communication with an exhaust path 8a of an exhaust device 8. And, by a change-over between an opening and a shutting of dampers 10a, 10b, 11a, 11b which are each formed in the air sending path 7a and the exhaust path 8a, an air flow direction in an upward or downward direction in a drying treatment room 1 executing an air feeding or an air exhausting from an upward and a downward air ventilation openings 5a, 5b, is so made as to be changed freely and an upward conversion or downward conversion of an air flow in the treatment room 1 can be executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous drying device for sheet materials such as glass cloth, cloth, paper or new materials.

[0002]

2. Description of the Related Art Conventionally, for example, after impregnating a sheet material with a resin liquid in an impregnation treatment, the solvent component in the resin liquid is diffused and dried, and further a drying treatment is performed to cure the resin component. This is already well known.

Further, in the case of a horizontal type as a drying device in which a sheet material to be treated is moved in a horizontal direction, an installation space becomes large and a means for preventing the sheet material from sagging down is particularly required. There are also many disadvantages to the use of, and therefore vertical type devices are often employed.

[0004]

In the vertical type drying chamber described above, the hot air for processing supplied to the processing chamber is caused to flow in the vertical direction, but the heated air tends to rise, so it is introduced into the processing chamber from below. It is advantageous that the heat management and temperature control are performed properly by exhausting air from the upper part and making it flow upward, but in the vertical type, generally, the sheet material to be processed is introduced from the lower part of the processing chamber. In many cases, the sheet material is moved upward, and as a result, it is in the same direction as the introduction of the heated air. Therefore, the sheet material comes into contact with hot air during the initial introduction, and the sheet material such as glass cloth, etc. is brought into contact with the hot air by the rapid temperature rising action. There is a case where the temperature causes an adverse effect such as deterioration of quality.

On the other hand, however, the heat treatment efficiency is extremely good because the sheet material and the heated air flow in the same direction, and the components separated from the sheet material are immediately removed along with the rising air, so that the work efficiency is improved. To do.

On the other hand, when the heated air in the processing chamber is sucked in from the upper part and discharged as a downward flow from the lower part,
The sheet material that is carried into the processing chamber from the bottom and moves upward is in contact with the heated air whose temperature has gradually decreased due to the downward flow at the initial stage of the loading, and is not affected by the heat suddenly. There is an advantage that the drying treatment can be gradually performed by the high heat treatment without being adversely affected.

When the purpose of quality control is as described above, it is desirable to direct the heated air to the backflow direction with respect to the moving sheet material, and to improve the efficiency of the heat treatment, it is preferable to direct the heated air to the normal wind direction. However, conventionally, there exists a dedicated device according to the purpose of use of the above-mentioned quality and thermal efficiency, but no device that can be shared for the two purposes.

[0008]

According to the present invention, a vertical drying apparatus for a sheet material is configured so that a single drying processing chamber can switch the usage purpose to improve quality and processing efficiency to meet the respective purposes. In the case where the drying processing chamber is vertical, the processing sheet material is moved vertically in the processing chamber, and heating and drying processing is performed by a heating device provided in the processing chamber during the movement, In addition, a ventilation port is provided to connect the heating air supply passage and the exhaust air passage by switching the dampers, respectively, and the flow direction of the heating air in the processing chamber is changed with respect to the sheet material that moves vertically in the drying processing chamber due to the switching operation. It is characterized in that it can be converted to reverse flow or forward flow at any time. Furthermore, two drying process chambers are provided side by side so that various kinds of use can be dealt with depending on the drying process content of the sheet material. Characterized in that the flow direction of the heated air 燥 treatment chamber was set to be be converted respectively to each other.

[0009]

The vertical continuous drying apparatus for sheet material according to the present invention is
As shown in FIG. 1 of the embodiment, for example, the damper 10a of the air supply passage 7a is opened, the damper 10b is closed, and the exhaust passage 8 is formed.
When the damper 11b of a is opened and the damper 11a is closed, the upper vent 6a is heated to an appropriate temperature and air is blown into the processing chamber 1, and the lower vent 6b is exhausted through the exhaust passage 8a. Downward air flow is generated from the upper part of the processing chamber 1, so that as shown in the figure, the sheet material a is carried in from the lower part in the processing chamber 1 and is directed upward, and is a reverse flow to the sheet material a which moves upward. In the initial stage of loading into the inside, it contacts the hot air that flows downward from the upper part and the temperature gradually decreases, and after being subjected to the drying process by the heat of relatively low temperature in the initial stage of loading, it moves upward and moves to the initial stage of blowing out. Since it comes in contact with high-temperature hot air, it is possible to suppress quality deterioration due to the initial rise and fall of temperature,
In the latter half of loading into the processing chamber 1, it is processed by fresh air and a sufficient amount of heat to obtain a quality product, and
Evaporative components such as a large amount of resin solvent generated in the treatment in the first half can be quickly discharged from the lower vent 6b.

Next, although not shown, the damper 10a in the air supply passage 7a is closed, the damper 10b is opened, and the exhaust passage 8 is opened.
If you close the damper 11b of a and open the damper 11a,
The air flow in the processing chamber 1 is upward, and in this case, it is a forward flow in the same direction as the sheet material a that is directed from the lower part to the upper part.
Depending on the quality of the sheet material a, the quality may be deteriorated by an excessive initial temperature rise due to contact with the hot treated hot air at the initial stage of loading into the interior, but generally the heated air blown out tends to rise. The exhaust from the upper part is made smoother, and the divergent components from the sheet material a are discharged more favorably by the rising air flow, the air flow management and temperature control are facilitated, and therefore the drying efficiency can be improved and the work efficiency can be improved. .

In the above description, the case in which the sheet material a is carried into the processing chamber a so as to move upward from the lower portion is shown. However, if necessary, the sheet material a is moved downward from the upper portion. Also in the case of carrying in as described above, it is completely the same that the backflow and the forward flow state of the heating air with respect to the sheet material a can be obtained by switching the suction direction of the heating air downward and upward at any time, and the operation content does not change.

Next, as shown in FIG. 5, two drying processing chambers are arranged side by side, and a supply / exhaust pipe line is provided for each of the processing chambers 1, 1'by a blower device 7, 7'and an exhaust device 8, 8 '. Damper 10a, 1
0b, 10c, 10d and 11a, 10b, 10c, 10
By providing d, the moving direction of the sheet material a in both chambers 1 and 1'becomes opposite to each other due to the switching opening and closing of these dampers. For example, as shown in FIGS. 5 and 6, in the left chamber 1, the sheet material a moves. If the heated air is made to flow backward with respect to the direction and the right chamber is made to flow in the forward direction, the left chamber 1 is subjected to a proper heat treatment for quality control without adverse effects due to the initial temperature rise of the sheet material a, and then the right chamber 1'is continued. In this case, the sheet material a can be subjected to heat-efficient treatment. Further, as shown in FIG. 7, both the left and right chambers 1 and 1'are continuously subjected to heat-efficient treatment with the heating air flow in the forward flow direction. Or sheet material a
As shown in FIG. 8, both chambers 1 and 1 ′ are processed in the reverse flow direction depending on the type of the chamber, and the flow direction of the heated air in each chamber 1 and 1 ′ is selectively converted to the desired processing. It is possible to correspond.

In the above description, the sheet material a is initially loaded from the lower side and moved upward. However, even if the sheet material a is initially loaded from the upper side and moved downward, the heated air is not discharged. If the flow direction is changed, the work content by backflow and forward flow in the processing chamber will not change.

As described above, according to the present invention, when the sheet material a is dried under the condition of quality control, the flow direction of the heated air in the processing chamber is reverse to the moving direction of the sheet material a. In order to improve the working efficiency of drying, one drying equipment can be used for both purposes so that the flow direction of the heated air can be converted to a forward flow.

[0015]

EXAMPLE An example of a vertical continuous drying apparatus for a sheet material according to the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a vertical type drying processing chamber, in which a processing sheet material a such as glass cloth is carried into the processing chamber 1 so as to continuously move in a vertical direction from a lower inlet 2 to an upper outlet 3. A heating device 4 such as a radiation heat radiating heater is arranged on both sides of the moving path of the sheet material a to heat the sheet material a.

Air chambers 5a, 5a, 5b and 5b are formed on both sides of the sheet material a in the upper and lower parts of the processing chamber 1, and vent holes 6a and 6b are formed on the outer wall surfaces of the upper and lower chambers 5a and 5b, respectively. Opened.

Each of the air supply passages 7a and the exhaust passages 8 communicating with the air blower 7 and the air exhauster 8 installed outside the drying processing chamber 1 on both sides.
a is vertically branched, and the air supply passage 7a and the exhaust passage 8a arranged vertically are connected and communicated with each other in an annular shape so as to be surrounded by the upper and lower outsides of the processing chamber 1 respectively, and outside the upper and lower sides of the processing chamber 1. The vent holes 6a and 6b opened on the wall surface were communicated with the upper and lower annular vent passages 9a and 9b.

Further, the upper and lower air blow passages 7a and the exhaust passage 8a are provided with branch dampers 10a, 10b, 1 respectively.
The air chambers 5a and 5b provided with 1a and 11b and partitioned and formed in the processing chamber 1 are communicated with the blowout duct 5c opened along the surface of the sheet material a, respectively.

The blower 7 is provided with a filter and an air preheater so as to obtain clean hot air, and the temperature controller adjusts the hot air to an appropriate temperature. The exhaust device 8 has a blown amount of air by the blower 7 and a sheet. Since it changes depending on the drying condition of the material a, it has an air volume control function to cope with this.

In the drying apparatus having the above-described structure, the air in the processing chamber 1 is changed by the air leaking or inhaling from the inlets / outlets 2 and 3 of the sheet material a into the processing chamber 1 and the air leaking along the sheet material a. Since a change in the intake / exhaust balance is unavoidable, an intake pipe 12 is arranged at the upper and lower portions of the processing chamber 1 where air leaks, and the intake pipe 12 is provided outside the processing chamber 1 via exhaust pipes 12a and 12b. Small-capacity auxiliary exhaust device 13
The excess air was removed by communicating with a and 13b to maintain the intake and exhaust balance of the air in the processing chamber 1.

The blower device 7, the exhaust devices 8, 13a, 1
3b uses a variable speed motor to adjust the temperature of the supplied hot air, and by connecting with an output device of a computer or a sequencer, presetting of numerical control makes it easy to change the air flow corresponding to the type of the processed sheet material a. Remote control is possible.

FIG. 5 shows another embodiment of the present invention in which two vertical drying processing chambers 1 and 1'are arranged side by side with a drawing wall 14 between them. The left first chamber is the same as in the previous embodiment. The sheet material a is carried in so as to move upward from the lower part of the sheet 1, and the sheet material a drawn out from the upper portion is a guide roll in the compartment 15 formed so as to cover the upper portions of both chambers 1 and 1 '. It is reversed by 16 and moved downward from the upper part of the left side second chamber 1 ′ so as to be taken out from the lower outlet 3, and the heat treatment is continuously performed during the movement in both chambers 1 and 1 ′. The equipment in the room is the same as in the previous embodiment.

The first and second chambers 1 and 1'communicate with the air supply and exhaust passages of the different air blowers 7 and 7'and the exhaust devices 8 and 8 ', respectively.

That is, the air blowers 7, 7'and the exhaust devices 8, 8'installed in the two chambers 1, 1'respectively, as shown in FIG. 1'each has a U-shaped air passage 9a surrounding the outer three sides of the upper and lower parts,
Vents 5a, 5b, 5 which are connected to 9b, 9a ', 9b' and open at the top and bottom of both chambers 1, 1'as in the previous embodiment.
a 'and 5b' are communicated with each other, and the branch paths 1 on both sides thereof are connected.
Opening and closing dampers 10a, 10b, 10c, 5 and 15 '
10d and 10a ', 10b', 10c 'and 10d' are provided.

In the above structure of the ventilation passage, the dampers 10a and 10d of the first chamber 1 are closed as shown in FIG.
When b and 10c are opened, the upper ventilation passage 9a of the first chamber 1 communicates with the air blowing passage 7b, and the lower ventilation passage 9b communicates with the exhaust passage 9b. A downward heated air flow can be obtained, and the damper 10 of the second chamber 1'can be obtained.
If a'and 10d 'are opened and 10b' and 10d 'are closed, the air passage 9a' in the upper part of the second chamber 1'communicates with the air passage 8a '.
The lower ventilation passage 9b 'communicates with the exhaust passage 8b' and thus the second
In the chamber 1 ', heated air flows downward from the upper part as shown by the arrow.

Further, by switching the dampers of the chambers 1 and 1 ', the heated air is directed upward in the first chamber, downward in the second chamber 1', and downward in the second chamber 1 ', as shown in FIG. By switching the dampers, the first and second chambers 1 and 2 are directed downward so that the first chamber 1 faces downward and the second chamber 1 ′ faces upward.
The sheet material a can be subjected to a desired heat treatment by changing the flow direction of the heated air in 1'for each chamber as needed.

In this embodiment, the exhaust gas from the first chamber 1 is circulated from the exhaust device 8 to the blower device 7'on the second chamber 1'side by the connecting pipe 16 to recover the exhaust heat. Indicates.

[0029]

According to the present invention, the ventilation holes provided in the upper and lower portions of the vertical drying chamber for vertically moving the sheet material to be treated are provided for the air supply passage and the exhaust passage connected to the air blower and the air blower. , By opening and closing the damper to switch and communicate with each other, the flow direction of the processing heating air in the drying processing chamber can be switched up and down at any time, and the flow of the processing hot air is converted to the backward flow or the forward flow with respect to the movement of the sheet material. In this way, the treatment for the purpose of quality control of the sheet material to be treated and the treatment mainly for improving the efficiency of the heat treatment are selectively performed in one drying facility, which is extremely economical in terms of the facility conditions. In addition, it has a practical effect that the configuration is simple and the handling operation can be easily performed.

[Brief description of drawings]

FIG. 1 is a cutaway front view showing an embodiment of a drying device according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a sectional view taken along line CC of FIG.

FIG. 5 is a cutaway front view showing another embodiment of the present invention.

FIG. 6 is a flow path system diagram of heated air in the embodiment shown in FIG.

7 is a diagram showing a conversion state of the flow path system diagram of FIG.

8 is a diagram showing a further conversion state of the flow path system diagram of FIG.

[Explanation of symbols]

a sheet material 1, 1'drying processing chamber 6a, 6b ventilation port 7 blower 8 exhaust device 7a air supply passage 8a exhaust passage 9a, 9b ventilation passage 10a, 10b, 10c, 10d, 11a, 11b open / close damper

Claims (2)

[Claims] 1. A drying treatment chamber in which a vertical treatment chamber is used, a treatment sheet material is moved vertically in the treatment chamber, and a heating device provided in the treatment chamber during the movement heats and dries the treatment sheet material. Vents are provided above and below the switch to communicate with the heating air supply path and exhaust path by switching the dampers respectively, and the switching operation allows the sheet material that moves up and down in the drying processing chamber to move the heating air in the processing chamber. A vertical continuous drying apparatus for a sheet material, characterized in that the flow direction can be changed to a reverse flow or a forward flow at any time. 2. Vertical drying processing chambers are provided in parallel, and the sheet material that has been moved vertically in the first chamber is folded back and moved in the opposite direction in the second chamber. 2. The vertical continuous drying apparatus for a sheet material according to claim 1, wherein the flow direction of the heated air is changed by changing the respective dampers as needed.