JPH0755339A - Drying device of running member - Google Patents

Abstract

PURPOSE:To provide a drying device of running member in which an efficient heating of air can be carried out, energy required for heating can be reduced, and water is removed from the running member after water washing of the member. CONSTITUTION:There are provided a first, a second and a third heater devices U1, U2 and U3 comprised of rod-like heaters 2,... and an elongated heater storing chamber 5 enclosing the heaters with a specific clearance C being spaced apart. Flowing-in slits 6a of the first and second heater devices U1 and U2 communicate with a pipe 8, and flowing-out slits 7a of the first and second heater devices U1 and U2 communicate with a flowing-in slit 6b of the third heater device U3. An ultra-sonic wave nozzle 3 communicates and couples with the flowing-out slits 7b of the third heater device U3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dryer for a moving body.

[0002]

2. Description of the Related Art Ink or coating agent or a water-based or solvent-based ink applied to a traveling body such as a plate traveling in one direction (hereinafter also referred to as a sheet) or a belt-shaped body such as a web or a sheet. The drying device used when drying the wet layer such as, or when drying and removing the solvent such as water adhering after washing the running body with water is conventionally a hot air surface of the wet layer. The structure was such that it was sprayed onto and dried.

[0003]

However, the boundary layer generated on the surface of the undried layer remains as it is (because the boundary layer cannot be broken) by merely blowing hot air as in the conventional drying device. There is a problem that it takes a long time to dry because it impedes heat conduction to the dry layer. Furthermore, this boundary layer has accumulated a high concentration of solvent vapor near the surface of the undried layer, which has been an obstacle to solvent transfer and drying.

When water and the like adhering to the surface of the running body are instantaneously dried and removed, it is necessary to blow off the water and the like by wind pressure, but a boundary layer is generated on the surface of the running body as in the above case. Therefore, it could not be completely blown away.

Further, the conventional ones have the drawbacks that a low-speed high-speed air is jetted at the time of starting, the efficiency of heating the air is poor, and the heat of the jetted hot air is immediately diffused.

Therefore, the present invention solves the above-mentioned drawbacks and provides a drying device for a traveling body which can efficiently heat air and can reduce energy (electrical energy) required for heating. With the goal.

[0007]

In order to achieve the above-mentioned object, a dryer for a traveling body according to the present invention comprises a blower for sending air, a heating chamber section for heating the air, the blower and the heating chamber section. And a pipe for connecting and communicating with each other, and an ultrasonic nozzle that generates an ultrasonic pressure wave that destroys the boundary layer generated on the surface of the traveling body during traveling by passing high-speed air, and the heating chamber portion has a rod shape. It has first, second and third heater units each comprising a heater and an elongated heater accommodating chamber which surrounds the heater with a predetermined clearance,
An inflow slit portion, which communicates with the pipe and is parallel to the heater, is provided in a part of the storage chambers of the first heater unit and the second heater unit, respectively, and in another portion of the storage chamber, A discharge slit portion for discharging air is provided on the side opposite to the inflow slit portion, and the discharge slit portion of the storage chamber of the first heater unit and the second heater unit is further provided in the storage chamber of the third heater unit. And an inflow slit part in a direction parallel to the heater and an exhaust slit part in communication with the ultrasonic nozzle.

It is also preferable to provide a vacuum means for sucking the high-speed high-temperature air jetted from the ultrasonic nozzle to the running body for running for circulation and reuse.

Further, it is also preferable that an outer flange portion 20 along the surface of the traveling body is provided in a projecting shape at a portion of the tip of the ultrasonic nozzle which is close to the traveling body during traveling.

[0010]

The air sent by the blower flows into the first heater unit and the second heater unit through the pipe and is heated. The air heated by the first heater unit and the second heater unit flows into the third heater unit and is further heated, and the heated air passes through the ultrasonic nozzle to generate ultrasonic pressure waves and high-speed high-temperature air. Erupts. Then, the ultrasonic pressure wave and the high-speed high-temperature air hit the running body that is running, and the surface of the running body is drained. At this time, the ultrasonic pressure wave can break the boundary layer generated on the surface of the traveling body, and the high-speed high-temperature air directly hits the surface of the traveling body, so that water droplets and the like attached to the surface of the traveling body are reliably blown off.

In the case where the vacuum means is provided, the heated air can be circulated and utilized, so that the energy required for heating the air (electrical energy required for heating the heater) can be reduced.

In the ultrasonic nozzle provided with the outer flange portion, the heated air can efficiently hit the traveling body, and the diffusion of heat can be prevented.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments.

FIG. 1 shows an embodiment of a traveling body drying apparatus according to the present invention. This apparatus has a blower 1 for sending air at a high speed, a heating chamber 4 for heating the air, and a blower 1. A pipe 8 that connects the heating chamber 4 to the heating chamber 4; and an ultrasonic nozzle 3 that generates an ultrasonic pressure wave W that destroys a boundary layer 12 generated on the surface of a traveling body 9 described later by passing high-speed air. I have it.

The heating chamber portion 4 comprises first, second and third heater units U ₁ and U _{2 which are} composed of rod-shaped heaters 2 ... And an elongated heater accommodating chamber 5 which surrounds the heater 2 with a predetermined clearance C. , U ₃ , and the first, second and third
The heater units U ₁ , U ₂ and U ₃ are provided so as to communicate with each other in three sets.

Specifically, in a part of the storage chambers 5 and 5 of the first heater unit U ₁ and the second heater unit U ₂ , respectively,
Inlet slits 6a, 6a communicating with the pipe 8 and parallel to the heater 2 are opened, and air is discharged to the other part of the storage chamber 5 on the side opposite to the inlet slits 6a, 6a. The discharge slits 7a, 7a are opened.

Furthermore, in the storage chamber 5 of the third heater unit U ₃ , the first heater unit U ₁ and the second heater unit U are placed.
The discharge slits 7a and 7a of the _two storage chambers 5 and 5 are connected to the discharge slits 7a and 7a in parallel with the heater 2, and the discharge slit 7b that is connected to the ultrasonic nozzle 3 is connected. , Provide. Inflow slit portion 6a,
6b allows air to flow in a direction orthogonal to the surface of the heater 2.

As the ultrasonic nozzle 3, 20 KH _Z
It is preferable to use one that generates an ultrasonic pressure wave W of 120 KH _Z. And, particularly preferably, 30 KH _Z ~
Those that generate the ultrasonic pressure wave W of 80KH _Z is good.

Reference numeral 9 indicates an arrow A by a conveying means 10 such as a conveyor.
The traveling body 9 is a strip-shaped traveling body such as a web or sheet. Reference numeral 11 is a water drop, which is attached after the running body 9 is washed with water.

This apparatus is constructed to drain the surface of the traveling body 9 during traveling by an air knife K containing an ultrasonic pressure wave W ejected from the ultrasonic nozzle 3.

Here, the term "draining" means that the water droplets 11 and other solvents adhering to the surface of the running body 9 are removed and dried.

The apparatus also includes a temperature detector 13 which detects that the heaters 2 have reached a predetermined temperature and sends a signal for activating the blower 1. The temperature detector 13 is electrically connected to a temperature sensor (not shown) attached to the heaters 2 ...

When the power switch (not shown) is turned on, the heaters 2 are heated. When the heater 2 reaches a predetermined temperature, the temperature detector 13 detects it and activates the blower 1.

Thus, the high speed air E ₁ from the blower ₁
Is sent to the inside of the heating chamber 4 through the pipe 8. Then, the high-speed air E ₁ flows into the first heater unit U ₁ and the second heater unit U ₂ , and is heated by the heaters 2 ... This first heater unit U ₁ and the second
The air heated by the heater unit U ₂ flows into the third heater unit U ₃ , is further heated, and becomes high-speed high-temperature air E ₂ , which passes through the ultrasonic nozzle 3.

As a result, an ultrasonic pressure wave W is generated (for example, based on the same principle as a whistle that generates ultrasonic waves). In this way, the air knife K consisting of the ultrasonic pressure wave W and the high-speed high-temperature air E ₂ is moved by the traveling body 9
Sprayed on the surface of.

Then, the boundary layer 12 formed on the surface of the traveling body 9
The (low-speed air layer) is destroyed by the ultrasonic pressure wave W, and the high-speed high-temperature air E ₂ directly hits the surface of the traveling body 9. As a result, the water droplets 11 ... Adhering to the surface of the traveling body 9 can be completely blown off.

Further, as described above, after the heaters 2 are heated, the high speed air E ₁ flows into the first heater unit U ₁ and the second heater unit U ₂ , and the heated air there is supplied to the third heater. Since it flows into the unit U ₃ and is further heated, the temperature of the air knife K becomes high from the beginning of ejection. Therefore, the surface of the running body 9 containing a slight amount of water after the water droplets 11 have been blown off can be completely dried from the beginning of the ejection of the air knife K. Even when the water droplets 11 ... Are solvents other than water, they can be dried in the same manner as described above.

Although the traveling body 9 has a strip shape,
It may be a plate-shaped member called a sheet by those skilled in the art.

Next, FIG. 2 shows another embodiment of the traveling-body drying apparatus of the present invention, which is a high-speed high-temperature air E ₂ jetted from the ultrasonic nozzle 3 to the traveling traveling body 9. And a timer circuit means 15 for activating the blower 1 after a predetermined time has passed from the start of energization of the heaters 2.

The vacuum means 14 includes a cover 16 having a downward opening which surrounds the heating chamber 4 above and laterally, and an air recovery pipe 18 which is connected to the cover 16 and the air inlet 17 of the blower 1. And. A filter 19 for air purification is arranged in the middle of the air recovery pipe 18.

An undried layer 21 of solvent-based ink, coating agent or the like is applied to one surface of the running body 9. Then, a slight gap S is provided between the lower opening edge of the cover portion 16 of the vacuum means 14 and the surface of the undried layer 21 applied to the traveling body 9.

Further, an outer flange portion 20 along the surface of the traveling body 9 is provided in a protruding shape at the tip of the ultrasonic nozzle 3 and near the traveling body 9 during traveling.

Further, as shown in FIG. 3, a flow dividing wall for equalizing the air volume of each part of the rod-shaped heater 2 in the longitudinal direction.
22 is provided in an air flow path 23 that sends air to the heater 2.

Returning to FIG. 2, the timer circuit means 15 activates the blower 1 after the heater 2 reaches a predetermined temperature, and the high speed air E ₁ flows into the heating chamber 4. The flow dividing wall 22 in the air flow path 23 of the heating chamber 4
As a result, the amount of high-speed air E ₁ contacting each part of the heater 2 in the longitudinal direction is equalized. As a result, the air temperature at each part of the nozzle discharge port can be made uniform, and the high-speed air E ₁ can be efficiently heated.

As described above, the high-speed air E ₁ is heated, the ultrasonic pressure wave W is generated from the nozzle 3, and the high-speed high-temperature air E ₂ is ejected.

The jetted high-speed high-temperature air E ₂ passes between the outer flange portion 20 and the undried layer 21 of the traveling body 9. Thereby, the diffusion of heat can be prevented and the drying efficiency can be improved.

Thereafter, the recovery air E ₃ recovered by the vacuum means 14 flows into the blower 1 through the recovery pipe 18 and the filter 19. In this way, since the high-speed high-temperature air E ₂ is collected and heated again by the heater 2 of the heating chamber section 4, the high-speed high-temperature air E ₂ can be generated with a small amount of energy (electrical energy). Therefore, it can contribute to energy saving.

[0038]

Since the present invention is constructed as described above,
The following effects are achieved.

According to the drying device for a moving body of claim 1, the air can be efficiently heated, and even if the air is at a high speed, it can be instantly heated to a high temperature. Then, the ultrasonic pressure wave W and the high-speed high-temperature air E are emitted from the ultrasonic nozzle 3.
_{Since 2} jets out, the water droplets 11 and the like adhering to the surface of the traveling body 9 can be completely blown off after the traveling body 9 is washed with water, etc., and can be dried at high speed.

According to the drying device for a moving body of the second aspect, the same effect as that of the first aspect can be obtained, and
Since the high-speed high-temperature air E ₂ ejected from the nozzle 3 can be circulated and used, the high-speed air E ₁ passing through the heater 2 can be instantly heated to a high temperature. Moreover, less energy (electrical energy) is required for heating, and operating costs can be saved.

According to the traveling-body drying device of the third aspect, the same effect as that of the first aspect is obtained, and
It is possible to prevent the heat of the high-speed high-temperature air E ₂ blown onto the traveling body 9 from being diffused, and to dry the surface of the traveling body 9 instantly and surely.

[Brief description of drawings]

FIG. 1 is a simplified sectional side view showing an embodiment of the present invention.

FIG. 2 is a simplified sectional side view showing another embodiment.

FIG. 3 is a sectional front view of a main part.

[Explanation of symbols]

1 Blower 2 Heater 3 Ultrasonic Nozzle 4 Heating Chamber 5 Slender Heater Chamber 6a Inlet Slit 6b Inlet Slit 7a Discharge Slit 7b Discharge Slit 8 Piping 9 Traveling Body 12 Boundary Layer 14 Vacuum Means 20 Outer Flange C Clearance E ₂ High speed high temperature air U ₁ 1st heater unit U ₂ 2nd heater unit U ₃ 3rd heater unit W Ultrasonic pressure wave

Claims (3)

[Claims] 1. A blower 1 for sending air, a heating chamber portion 4 for heating the air, a pipe 8 for connecting the blower 1 and the heating chamber portion 4 to each other, and a surface of a traveling body 9 during traveling. An ultrasonic nozzle 3 that generates an ultrasonic pressure wave W that destroys the boundary layer 12 by passing high-speed air,
The heating chamber section 4 includes a rod-shaped heater 2 ...
Has first and second and third heater units U ₁ , U ₂ and U _{3 each} of which includes an elongated heater housing chamber 5 which surrounds the first heater unit U ₁ and the second heater. The inflow slits 6a, 6a, which communicate with the pipe 8 and are parallel to the heater 2, are provided in a part of the accommodating chambers 5, 5 of the unit U ₂ , and the other part of the accommodating chamber 5 is opened. , the discharge slit portion 7a being received slits 6a, and 6a for discharging the air to the opposite side, opened 7a, furthermore, the storage chamber 5 of the third heater unit U _3, the first heater unit U ₁ and the second heater unit U ₂ of the discharge slit portion 7a of the housing chamber 5,5, the heater 2 and the direction parallel to the inlet slit portion 6b with being communicatively connected to 7a, and 6b, communicating with the ultrasonic nozzle 3 Ejection slit part to be connected b a traveling-body drying apparatus is characterized by providing. 2. The traveling body according to claim 1, further comprising a vacuum means 14 for sucking the high-speed high-temperature air E ₂ ejected from the ultrasonic nozzle 3 to the traveling traveling body 9 for circulation reuse. Drying device. 3. An outer flange portion 20 extending along the surface of the traveling body 9 at the tip of the ultrasonic nozzle 3 and approaching the traveling body 9 during traveling is provided in a protruding manner. 1. The traveling body drying device according to 1.