JP3216671B2 - Drying device for traveling body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying device for a running body.

[0002]

2. Description of the Related Art A water-based or solvent-based ink or coating agent applied to a plate-like member (hereinafter sometimes referred to as a sheet) traveling in one direction, or a belt-like member such as a web or a sheet. Conventionally, a drying device used for drying an undried layer such as the above, or for drying and removing a solvent such as water adhered after washing the running body with water, etc. And dried.

[0003]

However, simply blowing hot air, as in the conventional drying apparatus, leaves the boundary layer formed on the surface of the undried layer as it is (since the boundary layer cannot be broken). There has been a problem that heat conduction to the drying layer is hindered, and that drying takes a long time. Furthermore, this boundary layer accumulated a high concentration of solvent vapor near the surface of the undried layer, which hindered the transfer of the solvent and drying.

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

[0005] Further, the conventional one has a drawback that a low-temperature high-speed wind blows out at the time of starting, a drawback that the efficiency of heating the air is poor, and a drawback that the heat of the blown hot wind is diffused immediately.

Accordingly, the present invention has been made to solve the above-mentioned drawbacks, and to provide a drying apparatus for a traveling body which can be used not only for drying an undried layer such as ink and coating agent, but also for draining the traveling body. Aim.

It is another object of the present invention to provide a traveling body drying apparatus which can efficiently heat air and reduce energy (electric energy) required for heating.

It is a further object of the present invention to provide a drying apparatus for a traveling body which can prevent a low-temperature high-speed air from being blown from a nozzle when the apparatus is started.

It is another object of the present invention to provide a drying apparatus for a traveling body capable of preventing diffusion of heat of air jetted from a nozzle.

[0010]

Means for Solving the Problems] above the traveling-body drying apparatus according to the present invention in order to achieve the object of a blower for sending the e earth, a heater for heating the air, the surface of the traveling member traveling An ultrasonic nozzle that generates an ultrasonic pressure wave that destroys the boundary layer generated by the passage of high-speed high-temperature air, and suctions high-speed air ejected from the ultrasonic nozzle to a traveling body for circulation and reuse Vacuum means.

Further, the drying device for a traveling body according to the present invention comprises:
An inflow slit that includes a rod-shaped heater and an elongated heater storage chamber surrounding the heater with a predetermined clearance, and allows air to flow into a part of the storage chamber in a direction perpendicular to the surface of the heater. A discharge slit part for discharging air to the opposite side to the inflow slit part in the other part of the storage chamber,
In addition, two or more sets of heater units each including the heater and the storage chamber are provided in communication with each other, and an ultrasonic nozzle is provided downstream thereof.

[0012] Further, the drying device for a traveling body according to the present invention comprises:
A blower that sends air, a heater that heats the air, an ultrasonic nozzle that generates an ultrasonic pressure wave that destroys a boundary layer generated on the surface of the traveling body by passing high-speed air, A temperature detector for detecting that the temperature has been reached and transmitting a signal for activating the blower.

Further, the drying device for a traveling body according to the present invention comprises:
A blower that sends air, a heater that heats the air, an ultrasonic nozzle that generates an ultrasonic pressure wave that destroys a boundary layer generated on the surface of the traveling body by passing high-speed air, and energization of the heater And timer circuit means for activating the blower after a predetermined time from the start .

[0014] In addition, the traveling-body drying apparatus according to the present invention,
A diverting wall for equalizing the air volume of each part in the longitudinal direction of the rod-shaped heater is provided in an air flow path for sending air to the heater, and the air heated by the heater is traveling from the ultrasonic nozzle to the traveling body traveling. It blows to.

[0015]

[Function] If the surface of a running object is drained by an air knife including an ultrasonic pressure wave, the boundary layer generated on the surface of the running object can be broken by the ultrasonic pressure wave, and the air knife is applied to the surface of the running object. Hits directly. As a result, water droplets and the like adhering to the surface of the traveling body can be reliably blown off.

In the apparatus provided with the vacuum means, the heated air can be circulated and used, so that the energy required for heating the air (electric energy required for heating the heater) is reduced.

[0017] In the case of the one provided with the elongated heater storage chamber surrounding the heater with a predetermined clearance, the heat exchange rate between the heater and the air can be increased.

In the apparatus provided with the temperature detector or the timer circuit means, since the blower operates after the heater is heated to a high temperature, the air generated from the ultrasonic nozzle has a high temperature from the beginning .

[0019] than that provided shunt wall to equalize the air volume in the longitudinal direction of each portion of the rod-shaped heater can be made uniform at the nozzle discharge port of the air temperature and, the heater and air The heat exchange rate can be increased.

[0020]

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

FIG. 1 shows an embodiment of a traveling body drying apparatus according to the present invention. The apparatus includes 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 for communicating and connecting the heating chamber 4 with the heating chamber 4 and an ultrasonic nozzle 3 for generating an ultrasonic pressure wave W for destroying a boundary layer 12 generated on the surface of the traveling body 9 by passing high-speed air. Have.

The heating chamber section 4 has rod-shaped heaters 2 and elongated heater storage chambers 5 surrounding the heaters 2 with a predetermined clearance C, respectively. That is, this device is composed of a rod-shaped heater 2.
, With a predetermined clearance C.

An inflow slit 6 is formed in a part of the storage chamber 5 to allow air to flow in a direction perpendicular to the surface of the heater 2. Further, a discharge slit 7 for discharging air to the side opposite to the inflow slit 6 is provided in the other part of the storage room 5.

A set of three heater units U... Comprising the heater 2 and the storage chamber 5 is provided in a communicating manner, and the ultrasonic nozzle 3 is provided downstream thereof.

[0025] It should be noted that, as the ultrasonic nozzle 3, 20KH _Z ~
Preferable to use those which generate a 120 KH _Z about ultrasonic pressure wave W. And particularly preferably, 30KH
Those that generate the ultrasonic pressure wave W of _{Z ~80KH Z} is good.

Reference numeral 9 denotes an arrow B by a conveying means 10 such as a conveyor.
The traveling body 9 is a belt-like one such as a web or a sheet. Numeral 11 denotes water droplets which adhere after washing the running body 9 with water.

This device is configured 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 "water drainage" refers to removing the water droplets 11 and other solvents attached to the surface of the traveling body 9 and drying the same.

The apparatus further comprises a temperature detector 13 for detecting that the heaters 2 have reached a predetermined temperature and transmitting 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 a power switch (not shown) is turned on, the heaters 2 are heated. When the temperature of the heater 2 reaches a predetermined temperature, the temperature detector 13 detects the temperature and activates the blower 1.

In this way, the high-speed air E ₁
Is sent into the heating chamber 4 through the pipe 8. Then, the high-speed air E ₁ flows into the heater unit U, is heated by the heater 2 ... and become high velocity hot air E _2, passes through the ultrasonic nozzle 3.

As a result, an ultrasonic pressure wave W is generated (for example, on the same principle as that of a whistle that generates ultrasonic waves). In this manner, the air knife K composed 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.

Then, the boundary layer 12 generated 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. Thereby, the water droplets 11 attached to the surface of the traveling body 9 can be completely blown off.

Further, as described above, after the heater 2 ... are heated, because the high-speed air E ₁ in the heater unit U flows, air knife K is composed of the initial ejection and high temperature. Therefore, the surface of the traveling body 9 containing a small 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 three sets of heater units U are provided in FIG. 1, two or four or more sets of heater units U may be used.

The traveling body 9 has a belt shape.
It may be in the form of a plate called a sheet by those skilled in the art.

FIG. 2 shows another embodiment of the drying apparatus for a running body according to the present invention, which is a high-temperature high-speed air E ₂ jetted from the ultrasonic nozzle 3 to the running body 9 during running. Means 14 for sucking air for circulation reuse, and timer circuit means 15 for starting the blower 1 after a predetermined time from the start of energization of the heaters 2.

The vacuum means 14 includes a cover 16 having a lower opening shape surrounding the upper side and the side of the heating chamber 4, and an air recovery pipe 18 communicating with the cover 16 and an air inlet 17 of the blower 1. And An air purification filter 19 is provided in the middle of the air collection pipe 18.

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

Further, in this device, an outer flange portion 20 along the surface of the traveling body 9 is provided in a protruding manner at the tip of the ultrasonic nozzle 3 and at a portion approaching the traveling body 9 during traveling. It has an ultrasonic nozzle 3.

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

[0042] Thus, back in FIG. 2, the timer circuit unit 15, the heater 2 is started blower 1 after reaching the predetermined temperature, high-speed air E ₁ flows into the heating chamber portion 4. The dividing wall 22 in the air flow path 23 of the heating chamber 4
Accordingly, the amount of high-speed air E ₁ in contact with the longitudinal direction of each portion of the heater 2 are equalized. Thus, the air temperature of each portion of the nozzle discharge opening can be made uniform, 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 jetted.

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, diffusion of heat can be prevented, and drying efficiency can be increased.

Thereafter, the recovered air E ₃ recovered by the vacuum means 14 flows into the blower 1 through the recovery pipe 18 and the filter 19. Thus, to recover the high velocity hot air E _2, for heating it again at the heater 2 of the heating chamber 4, may generate high velocity hot air E ₂ at less energy (electrical energy). Therefore, it can contribute to energy saving.

[0046]

Since the present invention is configured as described above,
The following effects are obtained.

According to the first aspect of the present invention, the water droplets 11 adhered to the surface of the running body 9 can be completely blown off after the running body 9 has been washed with water, and can be dried at high speed. Can be done . Further, in order to recycling the high velocity hot air E ₂ ejected from Bruno nozzle 3 can be heated to a high temperature high-speed air E ₁ passing through the heater 2 instantly. In addition, energy (electric energy) required for heating can be reduced.

[0048] According to the travel-body drying apparatus according to claim 2, it is possible to heat the air efficiently, air can be heated to a high temperature instantaneously even faster.

According to the third aspect of the present invention, it is possible to prevent low-temperature high-speed air from being ejected from the nozzle 3 when the apparatus is started. Therefore, it is possible to prevent a problem such as undried ink or the like of the traveling body 9 from flowing and soiling the painted surface.

According to the fourth aspect of the present invention, the same effect as that of the third aspect is obtained .

[0051] According to the travel-body drying apparatus according to claim 5, high-speed air E ₁ can be efficiently heated, preventing the waste of energy with may reduce the energy (electric energy) required for heating it can.

[Brief description of the drawings]

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

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

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Blower 2 Heater 3 Ultrasonic nozzle 5 Slender heater storage room 6 Inlet slit part 7 Discharge slit part 9 Running body 12 Boundary layer 13 Temperature detector 14 Vacuum means 15 Timer circuit means 20 Outer flange part 22 Dividing wall 23 Air flow path C Clearance E ₁ High speed air E ₂ High speed high temperature air K Air knife U Heater unit W Ultrasonic pressure wave

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F26B 21/00 F26B 5/02

Claims (5)

(57) [Claims] 1. A blower 1 for sending air, and
Heater 2 to be heated and the surface of running body 9 running
The ultrasonic pressure wave W that destroys the boundary layer 12
An ultrasonic nozzle 3 be generated by passing in earth E _1, the
High speed jetted from the ultrasonic nozzle 3 to the traveling body 9 during traveling
Bakyu which sucks hot air E ₂ for circulating reuse
A drying unit for a traveling body, comprising: 2. A rod-shaped heater 2.
Elongate heater that surrounds the heater with a predetermined clearance C
And a storage room 5 and a part of the storage room 5
Air flows in a direction perpendicular to the surface of heater 2
The inflow slit section 6 is opened, and
A discharge slit that discharges air to the side opposite to the slot 6
A part 7 is opened in the other part of the storage room 5 and the heater
Heater unit U, which is composed of
And more than one pair are provided in communication, and an ultrasonic nozzle 3 is
A drying device for a running body, which is characterized in that the drying device is used. 3. A blower 1 for sending air, and
Heater 2 to be heated and the surface of running body 9 running
The ultrasonic pressure wave W that destroys the boundary layer 12
The ultrasonic nozzle 3 generated by the passage of the air E ₁
Detecting that heaters 2 have reached a predetermined temperature,
A temperature detector 13 for sending a signal for activating the lower 1,
A drying device for a traveling body, comprising: And 4. A blower 1 sends air, a heater 2 ... heating the air, passing through the ultrasonic pressure waves W to destroy the boundary layer 12 that occurs on the surface of the traveling body 9 during travel fast air E ₁ After a predetermined time from the start of energization of the ultrasonic nozzle 3 generated by the heater 2 and the heaters 2.
1. A drying device for a traveling body , comprising: timer circuit means 15 for activating the driving device 1. 5. The wind of each part of the rod-shaped heater 2 in the longitudinal direction.
Dividing walls 22 for equalizing the amount are transferred to the heater 2
The heater 2 is installed in the air passage 23 for sending air.
Running while heating the heated air from the ultrasonic nozzle 3
A drying device for a traveling body, which is sprayed onto the row body 9 .