JP3028175B2 - Web heat treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment apparatus for performing heat treatment or drying of a web.

[0002]

2. Description of the Related Art A heat treatment apparatus for a web is used to move the web up and down.
While being interposed between the conveyer nets of the layer and running with the conveyer net, hot air is sprayed on the upper and lower surfaces of the web to perform heat treatment or drying. And traditionally,
The following heat treatment apparatus is available (Japanese Unexamined Patent Publication No. 3-27946).
No. 0).

[0003] That is, an inlet, an outlet, and a circulation device for air provided in a chamber which is a heat treatment room, a heating device for heating wind from the circulation device, and a web of cloth or the like running in the front-back direction of the chamber. A plurality of nozzles extending in the width direction and having an outlet on a surface facing the web, and a duct for sending hot air from a heating device to the plurality of nozzles. A plurality of nozzles are arranged at predetermined intervals in the longitudinal direction of the web, and a central portion in the width direction of a surface of each of the nozzles facing the outlet is arranged at a predetermined interval in the longitudinal direction of the web. A connection port with a duct is provided at the bottom, and the duct is provided narrower than the width direction of the nozzle, and is connected to connection ports of a plurality of nozzles.

[0004]

In the above-mentioned heat treatment apparatus, it is necessary to perform the heat treatment in the best condition while reducing and stabilizing the web in a floating state.

Conventionally, in order to make the floating state the best state, an operator controls the web tension and the nozzle wind speed while visually checking the floating state of the web.

However, with this manual control,
There was a problem that skill was required and the adjustment was difficult.

The present invention provides a web heat treatment apparatus capable of automatically adjusting a floating state.

[0008]

Means for Solving the Problems The invention of claim 1 is as follows.
It is on the street. A plurality of nozzles are arranged in a zigzag pattern along the top and bottom of the web travel path inside the chamber, and the web carried into the chamber is subjected to heat treatment or drying in a substantially sinusoidal floating state by hot air injected from the nozzles. in the heat treatment apparatus for performing a tension adjusting means for adjusting the web tension, and the wind speed adjusting means for adjusting the wind velocity of the nozzle, and set the floating height inputting means for inputting a set floating height, Seal Script
Range for inputting the appropriate range of airflow and nozzle wind speed
An input unit, in accordance with the has been set floating height input to the set floating height input means to adjust the wind speed of the web tension or the nozzle by the tensioning means or the air velocity adjustment means, the proper range
Tension and nozzle wind input by enclosure input means
A web heat treatment apparatus characterized by comprising control means for controlling the web floating height to a set floating height within an appropriate speed range .

The invention of claim 2 is as follows. Cha
Nozzles along the top and bottom of the web path inside the
A plurality of birds were arranged and carried into the chamber.
The web is sine-shaped by hot air injected from the nozzle.
Heat treatment for heat treatment or drying in floating wave
The tension for adjusting the web tension
Means for adjusting the wind speed of the nozzle
And the setting flow for entering the setting floating height
Operating height input means and the set floating height
The floating height set in the input means.
The tension adjusting means or the wind speed adjusting means
Adjust web tension or nozzle wind speed
And set the floating height of the web
The setting floating height input means is capable of inputting the set floating height with a constant width, and the control means is capable of inputting the set floating height inputted by the set floating height input means. A web heat treatment apparatus characterized in that a floating height of a web is controlled to a set floating height within a height range.

[0010] The invention of claim 3 is as follows. A plurality of nozzles are arranged in a zigzag pattern along the top and bottom of the web travel path inside the chamber, and the web carried into the chamber is subjected to heat treatment or drying in a substantially sinusoidal floating state by hot air injected from the nozzles. In the heat treatment apparatus to be performed, tension adjusting means for adjusting the web tension, wind speed adjusting means for adjusting the wind speed of the nozzle, setting tension input means for inputting the set tension, and inputting an appropriate range of the floating height. Of the web by the tension adjusting means or the wind speed adjusting means in accordance with the appropriate range of the setting tension input to the setting tension input means and the appropriate range of the floating height input to the appropriate range input means. Adjust the tension or the wind speed of the nozzle to adjust the web tension. It is a web of heat treatment apparatus, wherein a more becomes possible and control means for controlling ® on to set tension.

The invention of claim 4 is as follows. The set tension height input means can input a set tension with a constant width, and the control means controls the web tension to the set tension within a range of the set tension input by the set tension input means. The web heat treatment apparatus according to claim 3, wherein:

The invention of claim 5 is as follows. A plurality of nozzles are arranged in a zigzag pattern along the top and bottom of the web travel path inside the chamber, and the web carried into the chamber is subjected to heat treatment or drying in a substantially sinusoidal floating state by hot air injected from the nozzles. In the heat treatment apparatus to be performed, tension adjusting means for adjusting the web tension, wind speed adjusting means for adjusting the wind speed of the nozzle, setting nozzle wind speed input means for inputting the set nozzle wind speed, and inputting an appropriate range of the floating height. Suitable range input means for performing the tension adjusting means or the wind speed adjustment in accordance with the set nozzle wind speed inputted to the set nozzle wind speed input means and the appropriate range of the floating height inputted to the proper range input means. Adjust the web tension or the wind speed of the nozzle by means of It is a web of heat treatment apparatus characterized by comprising further a control means for controlling the constant nozzle wind speed.

The invention of claim 6 is as follows. The set nozzle wind speed input means can input the set nozzle wind speed with a certain width, and the control means controls the nozzle wind speed to the set nozzle wind speed within a range of the set nozzle wind speed input by the set nozzle wind speed input device. The web heat treatment apparatus according to claim 5, wherein

The invention according to claim 7 is as follows. When the control means adjusts the web tension or the wind speed of the nozzle to control the floating height, the tension or the nozzle wind speed to the set floating height, the set tension or the set nozzle wind speed, the following relationship is satisfied. The web heat treatment apparatus according to any one of claims 1 to 6, wherein:

T = K1 · V ² / (K2 · H + K3) ^1.78 where T is the web tension, V is the wind speed of the nozzle, and H
Is the set floating height. Also, K1, K2,
K3 is a constant.

The invention of claim 8 is as follows. When the control means adjusts the web tension or the wind speed of the nozzle to control the floating height, the tension or the nozzle wind speed to the set floating height, the set tension or the set nozzle wind speed, the following relationship is satisfied. The web heat treatment apparatus according to any one of claims 1 to 6, wherein:

T = (L1 · V ³ + L2 · V ² + L3 ·
V) / (L4 · H + L5) ^1.78 where T is the web tension, V is the wind speed of the nozzle, and H
Is the set floating height. Also, L1, L2,
L3, L4, and L5 are constants.

The invention of claim 9 is as follows. A tension detecting unit for detecting a tension of the web; and a wind speed detecting unit for detecting a wind speed of the nozzle, wherein the control unit determines the tension adjusting unit or the wind speed from the detected values of the tension detecting unit and the wind speed detecting unit. The web heat treatment apparatus according to any one of claims 1 to 8, wherein the adjusting means is feedback-controlled to control the floating height, the tension or the nozzle wind speed to the set floating height, the set tension or the set nozzle wind speed. .

The invention of claim 10 is as follows. The web heat treatment apparatus according to any one of claims 1 to 9 , wherein the web is floated between two traveling net conveyors.

The eleventh aspect of the present invention is as follows. A vibration dimension measuring means for measuring a vibration dimension of the web in a floating state, wherein the control means controls a floating height, a tension or a nozzle wind speed to a set floating height, a set tension or a set nozzle wind speed, and 2. A tension control of the web or a wind speed of the nozzle is further feedback-controlled by the tension adjusting means or the wind speed adjusting means so that a measured value of the dimension measuring means becomes small.
10. A web heat treatment apparatus according to claim 9 .

The twelfth aspect of the present invention is as follows. A plurality of nozzles are arranged in a zigzag pattern along the top and bottom of the web travel path inside the chamber, and the web carried into the chamber is subjected to heat treatment or drying in a substantially sinusoidal floating state by hot air injected from the nozzles. In the heat treatment apparatus to be performed, tension adjusting means for adjusting the tension of the web, wind speed adjusting means for adjusting the wind speed of the nozzle, vibration dimension measuring means for measuring the vibration dimension of the web in a floating state, and measurement of the vibration dimension measuring means A web heat treatment apparatus characterized by comprising a control means for feedback-controlling a web tension or a wind speed of a nozzle by the tension adjusting means or the wind speed adjusting means so as to reduce the value.

The invention of claim 13 is as follows. The tension adjusting means includes a web suction roller provided in front of the chamber, a web tension adjustment roller provided in the rear of the chamber, and a web tension caused by a rotation speed difference between the suction roller and the tension adjustment roller. it is more the speed adjusting means for adjusting a web of a heat treatment apparatus according to claim 12, wherein claim 1, wherein the.

The invention of claim 14 is as follows. The wind speed adjusting means includes a fan motor of a fan for circulating the hot air in the chamber interior, according to claim 12, wherein claim 1, wherein the more becomes possible with rotational speed control control means for controlling the rotational speed of the fan motor Is a web heat treatment apparatus.

[0024]

[ Operation ] The web heat treatment apparatus according to claims 1 and 2.
explain. The floating state of the web can be determined by the web tension, the nozzle wind speed of the nozzle, and the floating height. Therefore, the control means adjusts the tension of the web or the nozzle wind speed of the nozzle by the tension adjusting means or the nozzle wind speed adjusting means in accordance with the set floating height inputted to the input means, thereby obtaining the actual floating height of the web. Adjust to the set floating height.

The web heat treatment apparatus of claim 3 will be described.
I will tell. The floating state of the web can be determined by the web tension, the nozzle wind speed of the nozzle, and the floating height. Therefore, the control means adjusts the web tension or the nozzle wind speed of the nozzle by the tension adjusting means or the nozzle wind speed adjusting means in accordance with the set tension inputted to the input means and the appropriate range of the floating height inputted to the appropriate range input means. Is adjusted to adjust the actual tension of the web to the set tension.

A web heat treatment apparatus according to claim 5 will be described.
I will tell. The floating state of the web can be determined by the web tension, the nozzle wind speed of the nozzle, and the floating height. Therefore, the control means adjusts the web tension or the nozzle of the nozzle by the tension adjusting means or the nozzle wind speed adjusting means in accordance with the set nozzle wind speed inputted to the input means and the appropriate range of the floating height inputted to the appropriate range input means. By adjusting the wind speed, the nozzle wind speed is adjusted to the set nozzle wind speed.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A web heat treatment apparatus 10 according to one embodiment of the present invention will be described below.

A. Structure of Heat Treatment Apparatus 10 The structure of the heat treatment apparatus 10 for web W will be described with reference to FIGS.

Reference numeral 12 denotes a chamber which is a heat drying chamber, and a web W insertion port 14 is provided on the front surface thereof.
An outlet 16 for the web W is provided on the rear surface. Also,
Windows 18 are provided on both side walls of the chamber 12 except for observing the inside of the chamber 12.

Reference numeral 20 denotes a fan provided on the ceiling surface of the chamber 12, and reference numeral 22 denotes a fan provided near the bottom of the chamber 12. This fan 2
0 and 22 are exhaust ports 28a on the front of the chamber 12.
From the air inlet 28b. Each of the fans 20 and 22 is rotated by a fan motor composed of an inverter motor, and the wind speed can be adjusted by controlling the number of rotations.

Reference numeral 24 denotes an upper nozzle disposed on the upper surface of the moving web W, which is arranged in a plurality of rows at predetermined intervals in the longitudinal direction of the web W. This upper nozzle 2
The width of the web 4 is slightly wider than the width of the web W, and two hot air outlets 30 are provided in a slit shape in the width direction on a surface facing the web W. Further, a connection port 32 which is a hot air blowing port is opened on a surface opposite to the blowing port 30, that is, on the upper surface of the upper nozzle 24.

The fans 20, 22 are arranged above and below the center of the moving web W in the width direction.
Thus, the web W is not drawn in one direction.

Reference numeral 34 denotes a duct, which is a fan 20.
From above to the upper nozzle 24. The duct 34 is divided into an upper duct 34a and a lower duct 34b. The upper duct 34a extends from the outlet of the fan 20 provided substantially at the center of the ceiling surface of the chamber 12 toward the front of the chamber 12. This duct 34
a, the primary filter 38, the heat exchanger 36, and the second
A next filter 40 is provided. This heat exchanger 3
Numeral 6 has a pipe in which steam or high-temperature oil circulates, and heats the air sent from the fan 20 to a certain temperature. The first filter 38 and the second filter 38
The next filter 40 is for removing dust and the like of the sent wind. In particular, the two filters 38, 4
The reason why 0 is provided is to further remove dust in the air and to prevent dust and the like from adhering to the web W.

The lower duct 34b has one end connected to the upper duct 34a and the other end extending along the longitudinal direction of the web W from the front of the chamber 12 to the rear.
The lower surface of the duct 34b, that is, the surface facing the web W is all open. Also, this duct 34b
The lower the height, the lower its height, and its ceiling is inclined. By inclining the ceiling surface in this way, the hot air flows in the front-back direction of the casing 12.
Hits web W evenly. Also, this duct 34b
Is configured to be smaller than the width of the upper nozzle 24. As described above, the duct 34 sends the wind sent from the fan 20 to the front part of the chamber 12 through the primary filter 38, the heat exchanger 36, and the secondary filter 40, and further, from this front part, It sends wind toward the rear.

Reference numeral 42 denotes a groove provided at both ends of the lower portion of the duct 34b.
Are engaged with the hanging portions 44 protruding from both ends of the. That is, the upper nozzle can be attached below the duct 34b by engaging the groove 42 with the suspension portion 44 of the upper nozzle 24.

Reference numeral 46 denotes a slide type closing plate slidably provided on the lower surface of the duct 34b, and two closing plates 46b and 46a are provided so as to be vertically overlapped. One end of the closing plate 46a is connected to the upper noise 24.
It is bent downward so that there is no gap with the rear surface,
One end of the closing plate 46b is also bent downward so that there is no gap with the front surface of the upper nozzle 24 adjacent to the upper nozzle 24. Thereby, the interval between the upper nozzles 24 is changed to the groove 4.
2 is moved to an arbitrary position, and the space therebetween is completely closed by the slide-type closing plate 46.

The plurality of lower nozzles 26 disposed on the lower surface of the web W are also connected to the fan 22 by the duct 48. This duct 48 also has an upper duct 48a and a lower duct 4
8b, a primary filter 50, a heat exchanger 52, and a secondary filter 54 are built in the lower duct 48b, and extend from the fan 22 provided substantially at the center of the bottom surface of the chamber 12 to the rear surface of the chamber 12. ing. The upper duct 48a is connected at one end to the lower duct 48b and extends therefrom toward the front of the chamber 12. The upper duct 48a is inclined so that its height decreases toward the front.

The upper nozzle 24 and the lower nozzle 26
The outlets are arranged in a zigzag pattern so that they alternate with each other.

The upper duct 48a and the lower duct 48b are
They are connected by a bellows-like duct 48c. Also,
The upper duct 48a is supported by a jack 49 driven by four motors 51. Thus, the upper duct 48a can be moved up and down while being connected to the lower duct 48b, which is convenient during maintenance.

Reference numeral 56 denotes a suction roller provided in front of the heat treatment apparatus 10. This suction roller 56
The running speed of the web W is adjusted by sucking the lower surface of the running web W. As the suction roller 56, for example, there is a "substrate transfer drum in a heat treatment apparatus" described in Japanese Patent Publication No. 3-68147.

Reference numerals 58 and 58 denote a pair of upper and lower tension adjusting rollers provided behind the heat treatment apparatus 10.
The pair of upper and lower tension adjusting rollers 58, 58 sandwich the web W therebetween, and adjust the traveling speed of the web W. Then, the suction roller 56 and the tension adjusting roller 5
8, the tension of the web W is adjusted.

Reference numeral 64 denotes a nozzle wind speed sensor provided inside the upper nozzle 24 or the lower nozzle 26. As the nozzle wind speed sensor 64, for example, there is a type in which a pitot tube is provided inside the nozzle. The nozzle wind speed sensor 64 is provided not only for one nozzle but also for a plurality of nozzles, and more accurate measurement can be performed by averaging the detection values. Also, without providing the nozzle wind speed sensor 64,
The wind speed value may be determined by inverter-controlling the fan motors of the fans 20 and 22.

Reference numeral 66 denotes a tension sensor. FIGS. 9 and 10 show specific examples of the tension sensor 66. FIG. 9 shows a fine-deviation type tension sensor using a tension detecting roller 66a. FIG. 10 shows a dancer roll type tension sensor, which is a dancer roll 66b.
Is detected by the air cylinder 66c.

The operation of the heat treatment apparatus 10 having the above configuration will be described below.

The web W is run at a constant speed in a floating state from the front side to the rear side of the chamber 12. Next, fan 2
A wind is generated by zero, and then the air is sent to the lower duct 34b through the primary filter 38, the heat exchanger 36, and the secondary filter 40 in the duct 34. The wind turned into hot air by the heat exchanger 36 is blown onto the upper surface of the web W running from the outlets 30 of the plurality of upper nozzles 24. The wind after the blown hot air, that is, the return air, passes between the adjacent upper nozzles 24 and heads upward, so that the lower duct 3
It returns to the position of the fan 20 provided on the ceiling of the chamber 12 through both sides of 4b. In this case, since the width of the lower duct 34b is formed smaller than the width of the upper nozzle 24, when the return air goes upward, the lower duct 34b does not become an obstacle, and the fan 20 is smoothed. Leads to.

The wind generated by the fan 22 also passes through the duct 48, reaches the upper duct 48a via the primary filter 50, the heat exchanger 52, and the secondary filter 54. The wind heated by the heat exchanger 52 is blown from the plurality of lower nozzles 26 to the lower surface of the web W through the upper duct 48a. Then, the return air passes between the adjacent lower nozzles 26, 26, and returns to the fan 22 through the upper duct 48a. Also in this case, since the width of the upper duct 48a is smaller than the width of the lower nozzle 26, the flow of the return air is not hindered and the fan 22 returns to the smooth state.

B. Explanation of the theory for controlling the floating state The theory for controlling the floating state of the web W using the heat treatment apparatus 10 having the above configuration will be described.

(1. Definition of Terms) First, an experiment conducted to introduce and prove a theory for controlling the floating state of the web W will be described. The experimental apparatus used was the heat treatment apparatus 10.

The definition of each term in this experiment will be described with reference to FIGS. FIG. 13 shows PET
FIG. 3 schematically shows a state where an experiment was performed using a film web W. FIG. Further, FIG. 14 shows that a sine wave half-wave type curved aluminum plate X is inserted between the traveling paths of the heat treatment apparatus 10 of FIG.
Supported by the lower nozzle 26 as in a normal heat treatment.
FIG. 3 schematically shows a case where hot air is blown out of the apparatus.
The reason why this aluminum plate X was used is that the force due to hot air cannot be measured with the web W of the PET film.

P is the nozzle installation distance, for example,
It refers to the mounting distance between the upper nozzle 24 and the adjacent upper nozzle 24. The unit is mm. And the mounting distance of the lower nozzle 26 is also represented by the same P.

H0 is the theoretical floating height.
The unit is mm. The theoretical floating height is obtained by measuring the distance between the lower nozzle 26 and the uppermost point of the aluminum plate X by a ruler in FIG.

F indicates the upper nozzle 24 or the lower nozzle 26
Is the force of the hot air blown from
-F / m. The unit is (m) per unit length because the effective width is measured and calculated using the unit length m. The measuring method measures the values of four weight meters 68 supporting the aluminum plate X. In this case, since the weight applied to the weight meter 68 is added to the weight of the aluminum plate X, the weight is subtracted in advance.

T is the tension applied to the web W, and is determined by the speed difference between the suction roller 56 and the tension adjusting roller 58. The unit is kg · f / m. Since the tension cannot be measured with the aluminum plate X, the tension is measured by the tension sensor 66 using a normal web W.

V is the nozzle wind speed. The unit is m
/ Sec. This measurement is performed by providing a nozzle wind speed sensor 64 inside the lower nozzle 26.

The relationship among the nozzle mounting distance P, the force F due to hot air, the tension T, and the theoretical floating height H0 is as follows.
The relationship shown in FIG. 13 is as follows.

Sin ψ = F / T and ψ is small and si
Since n 略 is substantially equal to tan 、, T = F / sin ψ = F / tan 、, and from FIG. 13, tan ψ = H0 / (P / 2).

Therefore, T = F ・ (P / 2) / H0 = k1 ・ F / H0 (1) However, k1 = P / 2.

(2. Relationship between Nozzle Wind Speed V, Force F Due to Hot Air, and Theoretical Floating Height H0) When F and H0 are measured by changing the V and using the experimental apparatus shown in FIGS. The result looks like a curve. The relationship between F and H0 obtained from the equation (1) is also shown by a straight line in FIG.

The experiments were conducted at V = 10 m / sec, 20 m / sec, 3
The measurement was performed at 0 m / sec, 40 m / sec, and 50 m / sec, and it can be seen from the curve state in FIG.

Log F = alog V + b where a and b are constants determined by experiments.

Here, when these a and b are determined from the values shown in FIG. 15, the relationship shown in Table 1 is formed.

[0062]

[Table 1] The equations in Table 1 are for each nozzle wind speed and cannot be used at points other than the measurement points. Therefore, since an equation that can be used at any nozzle wind speed is required, it is assumed that the following relationship is established here.

F = k 2 (V) · V / H 0 ^0.78 This equation is inferred from the relationship shown in Table 1, and that the force F due to the hot wind has a phase relationship with the nozzle wind speed V. It was derived by By transforming this, k2 (V) = F · H0 ^0.78 / V (2)

Then, if the relationship of the expression (2) is established, an expression that can be used at any nozzle wind speed can be obtained.

[0065]

[Table 2] Table 2 is a table formed from the values read from FIG.
The horizontal axis of the table is the theoretical floating height H0, and the vertical axis is the nozzle wind speed V. The relationship between F and k2 (V) calculated from equation (2) is shown.

FIG. 16 is a graph of the relationship shown in Table 2. In the graph of FIG. 16, the vertical axis is k2 (V) and the horizontal axis is V.

From the graph of FIG. 16, the relationship between k2 (V) and V can be approximated as a function of a linear expression or a quadratic expression.

In the case of approximation as a quadratic equation When the relationship between k 2 (V) and V is solved as a quadratic equation from the graph in FIG. 16, k 2 (V) = 0.000045V (V + 190) (3) Become.

[0069] a (3) Substituting (2) into equation ^{F = 0.000045V (V + 190)} V / H0 0.78 = 0.000045V 2 (V + 190) / H0 0.78 ......... (4) .

Therefore, when F is eliminated from the equations (1) and (4), T = 0.000045V ² (V + 190) k1 / H0 ^1.78 (5)

Whether the contents of equation (5) match the actual ones is verified using the graph of FIG.
become that way. Here, k1 is 90 (that is, the distance P between the nozzles is 180 mm).

[0072]

[Table 3] The horizontal axis in Table 3 is the actual tension value in FIG. 15, and the vertical axis is the nozzle wind speed. The upper part in the table is the theoretical floating height H0, and the lower part is the value of the theoretical tension T0 obtained by theory. When this theoretical tension T0 is compared with the actual tension T on the vertical axis, they are almost the same. Therefore, it can be determined that Expression (5) is an expression that can be actually used for control.

In the case of approximation as a linear expression When the relationship between k 2 (V) and V is approximated by a linear expression from the graph of FIG. 6, the following is obtained.

[0074] k2 (V) = 0.01V F = k2 (V) / H0 0.78 T = k1 · F / H0 ^{Therefore, T = 0.01k1 · V 2 /} H0 1.78 ......... (6) Becomes

Table 3 shows whether the equation (6) matches the actual one by using the graph of FIG. Here, k1 is 90 (that is, the distance P between the nozzles is 180 mm).

[0076]

[Table 4] The horizontal axis in Table 4 is the actual tension in FIG.
The vertical axis is the nozzle wind speed. In the table, the upper part is the theoretical floating height H0, and the lower part is the theoretical tension T0 obtained from the equation (8). When this theoretical tension T0 is compared with the actual tension on the vertical axis, they are almost the same. Therefore, it can be determined that Expression (5) is an expression that can be actually used for control.

(3. Relationship Between Theoretical Floating Height H0 and Actual Floating Height H) The actual floating height H is a floating height when an actual web W is used. In this case, the actual floating height H differs depending on the type (ease of stretching, weight) of the web W.

The actual floating height H in the case of a PET film (thickness of 25 μm) was measured by an experiment, and the horizontal axis of the graph in FIG. 15 is described in comparison with H 0.

In this measuring method, the actual floating height H, the nozzle wind speed V, and the tension T are measured using a PET film using the experimental apparatus shown in FIG. Then, the intersection point of the nozzle wind speed V and the tension T obtained at the theoretical floating height H0 is lowered downward, and the value of the actual floating height H is plotted at the point where it intersects the horizontal axis. For example,
Since the experimental data is (T, V, H) = (6, 50, 20), the point at which the straight line at T = 6 and the curve at V = 50 in FIG. The point intersecting with is H = 20.

From FIG. 15, when H = 35 mm, H0 = 48.
mm, H0 = 2.5 mm when H = 1 mm.

From this, the relationship between H and H0 is obtained as (H0 -2.5) /45.5= (H-1) / 34.

When H0 is rearranged, H0 = 1.34H + 1.162 (7). However, H> 1.

In the actual control of the heat treatment apparatus 10, since the aluminum plate X is not used, the tension T (k
g), the nozzle wind speed V (m / sec) and the actual floating height H need to be input.

Therefore, when H 0 is converted to H and a quadratic equation is used, from the equations (5) and (6), T = 0.000045 V ² (V + 190) k1 / (1.34H +
1.162) ^1.78 (8)

From the equation (8), the relationship among the tension T, the nozzle wind speed V and the actual floating height H is obtained.

When H0 is converted to H and a linear equation is used, from equations (6) and (7), T = 0.01 k 1 · V ² /(1.34H+1.162) ^1.78 (9)

From the equation (9), the relationship between the tension T, the nozzle wind speed V, and the actual floating height H is obtained.

(4. Conclusion) In the case of approximation as a linear expression Using a PET film having a thickness of 25 μm,
In the case where the slit which is the width of the injection port of No. 6 is 2.0 mm and the nozzle mounting pitch P is 180 mm, T = 0.01 k 1 · V ² /(1.34H+1.162) ^1.78 (9) Becomes

When expressed by a general formula, T = K1 · V ² / (K2 · H + K3) ^1.78 (10)

Here, T is the tension (kg) of the web W.
It is. Here, the unit is kg, but it is necessary to input it after converting to the force per 1 m width. Therefore, the measurements in FIG. 15 are for kg / m.

V (m / sec) is the nozzle wind speed.

H (mm) is the actual floating height.

K1 is determined by the nozzle structure, slit width, and nozzle mounting pitch. For example, slit 2.0mm, nozzle mounting pitch 180m
In the case of m, it becomes 1.0.

K2 and K3 vary depending on the type of the web W. For a 25 μm thick PET film, K
2 = 1.34, and K3 = 1.162.

When approximating as a quadratic equation When using a PET film with a thickness of 25 μm, the slit which is the width of the injection port of the lower nozzle 26 is 2.0 mm, and the nozzle mounting pitch P is 180 mm, T = 0.000045V ² (V + 190) k1 / (1.34H +
1.162) ^1.78 (8)

In the general formula, T = L1 · V ³ + L2 · V ² + L3 · V + L4 / (L5
H + L6) ^1.78 (11)

However, L1 to L4 are determined by the nozzle characteristics, and L5 and L6 are determined by the characteristics of the web W.

C. FIG. 17 is a block diagram in the case where the heat treatment apparatus 10 is controlled using the equation (7). In this block diagram,
The fan motors of the fans 20 and 22, the tension adjusting roller 58, and the suction roller 56 are controlled by a control device 60 including a microcomputer. The control device 60 is provided with an input device 62. Input device 62
, The constants of T, V, H, and K1 to K3 can be input.

The control device 60 controls the number of rotations of each fan motor of the fans 20 and 22 so that the upper nozzle 1
8 and the nozzle wind speed blown from the lower nozzle 26 are controlled. Further, the suction roller 56 and the tension adjusting roller 58
Is controlled to adjust the tension applied to the web W.

The nozzle wind speed is fed back to the control device 60 by the nozzle wind speed sensor 64. Also,
The tension is also fed back to the control device 60 by the tension sensor 66.

Equation (7) is stored in the control device 60, and the nozzle wind speed value of the nozzle wind speed sensor 64, the tension value of the tension sensor 66, and the input value of the set floating height are always (7). The control device 60 controls the fans 20 and 22, the tension adjusting roller 58 and the suction roller 56 so as to satisfy the formula.

The control state will be described with reference to the flowchart of FIG.

In step 1, T, V, H, K1 to
Input each constant of K3. Here, H is a set floating height, that is, a value of a center to be controlled (hereinafter, referred to as a specific value) is input. However, in order to easily control the specific value, a certain range is given and input. As for T and V, an appropriate controllable range is input.

In step 2, T, V, H, K1 to
It is checked whether or not the input range of K3 is within the appropriate range. Otherwise, return to step 1.

In step 3, when the apparatus 10 starts operating, the nozzle wind speed sensor 64 and the tension sensor 6
The fans 20, 22 and the tension roller 58 and the suction roller 56 are adjusted so that the value from 6 and the input value of the set floating height satisfy Expression (7). In this case, the controlled value falls within an appropriate range.

Then, when the processing is completed, the processing ends.

As a result, the actual floating height is maintained at the value of the set floating height H input by the operator, and the floating state can be easily controlled.

In the above control, the set floating height is input as the specific value. However, the nozzle wind speed or tension may be input as the specific value and set as the central value of the control.

D. Control of Micro-Vibration of Web W In the heat treatment apparatus 10, the laser displacement meter 70 is
As shown in (2), the web W is mounted at the center of the distance between the nozzles, and the micro-vibration dimension of the web W is measured. Then, the size of the minute vibration is output to the control device 60. Control device 60
Adjusts the nozzle wind speed and tension so as to reduce the size of the micro-vibration. In this case, it may be performed as secondary control after controlling the floating height,
Moreover, you may control independently. As the laser displacement meter 70, a device having a semiconductor laser and an aspheric lens can be applied.

E. Heat Treatment Apparatus 100 of Second Embodiment In the first embodiment, the heat treatment apparatus 10 as shown in FIG. 1 was used. However, the present control is not limited to this, and the web W is floated between the conveyor nets. And the heat treatment apparatus 100 in which the upper and lower nozzles are arranged in a staggered manner.

A web W heat treatment apparatus 100 according to a second embodiment will be described with reference to FIGS.

Reference numeral 112 denotes a chamber of the heat treatment apparatus 100. A loading port 114 for the web W is provided on the front surface of the chamber 112, and a loading port 116 is provided on the rear surface.

Reference numeral 118 denotes a plurality of upper nozzles provided above the traveling path of the web W inside the chamber 112. The upper nozzle 118 is provided along the width direction of the web W, and a slit-shaped ejection port is provided on the lower surface of the upper nozzle 118 along the width of the web W. Therefore, on the lower surface of the upper nozzle 118, a slit-shaped injection port is provided along the width of the web W. Therefore, the hot air is blown over the entire width of the upper surface of the web W.

Reference numeral 120 denotes a plurality of lower nozzles provided below the traveling path of the web W. This lower nozzle 120
Is provided over the entire width of the web W, and a slit-shaped injection port is provided on the upper surface of the lower nozzle 120 along the width of the web W. Therefore, the hot air is blown over the entire width of the lower surface of the web W. The upper nozzles 118 and the lower nozzles 120 are arranged in a zigzag pattern when viewed from the side as shown in FIG.

Reference numeral 122 denotes a partition wall that partitions the upper part of the chamber 112 up and down. An exhaust port 124 for exhausting hot air is provided at the center of the partition wall 122.

Reference numeral 126 denotes a hot air chamber located above the partition wall 122. The hot air chamber 126 is provided with a heating device 128 using a burner and a blowing device 130.

Reference numeral 132 denotes a duct provided along the right side surface of the chamber 112. This duct 132
Transmits hot air sent from the blower 130 to the upper nozzle 11
8 and the lower nozzle 120 respectively.

Reference numerals 134, 134 denote upper and lower two-layer conveyor nets which run between running paths. A web W is provided between the upper and lower two-layer conveyor nets 134, 134.
Is transported.

Reference numeral 136 denotes a suction roller provided in front of the heat treatment apparatus 100. This suction roller 13
6 adsorbs the lower surface of the running web W and
Adjust the running speed of the.

Reference numerals 138 and 138 denote heat treatment apparatuses 100
, A pair of upper and lower tension adjusting rollers provided at the rear of the roller. The pair of upper and lower tension adjusting rollers 138, 1
38 adjusts the running speed of the web W by sandwiching the web W therebetween. Then, the tension of the web W is adjusted based on the speed difference between the suction roller 136 and the tension adjusting roller 138.

Reference numeral 144 denotes a nozzle wind speed sensor provided inside the upper nozzle 118 or the lower nozzle 120.

Reference numeral 146 denotes a tension sensor.

The operating state of the heat treatment apparatus 100 having the above configuration will be described.

[0124] The traveling web W is
After passing through 6, it is carried into the chamber 112 from the carry-in port 114.

The air heated by the heating device 128 is ejected from the upper nozzle 118 and the lower nozzle 120 via the duct 132 by the air blower 130.

The web W travels between a pair of upper and lower conveyor nets 134, 134, and is floated in a substantially sinusoidal shape by hot air blown out from the staggered upper and lower nozzles 118, 120 to provide a kneading effect. And heat treated.

The heat-treated web W is transferred to the carry-out port 11
6 and the tension adjusting rollers 138, 138
And is conveyed to the subsequent process.

The hot air that has hit the web W
After passing through 24, it reaches the hot air chamber 126 again.

In this case as well, the control device 60 has a blower 130 and a pair of tension adjusting rollers 138, 1
38, the suction roller 136, the nozzle wind speed sensor 144, and the tension sensor 146 are connected, and feedback control is performed using the equation (7) as in the first embodiment, so that the actual floating height becomes Control can be performed so that the value of the set floating height H input by the operator is maintained.

F. Others The constants obtained by the above equations (7) and (9) are determined by the characteristics of the nozzles and the properties of the web W, respectively, and may be determined according to the respective properties. In addition to adjusting the nozzle wind speed by using a fan motor, a damper may be provided in the airflow path, and the nozzle wind speed may be adjusted by the opening and closing amount.

[0131]

As described above, according to the web heat treatment apparatus of the present invention, the control means sets the actual floating height of the web to the set floating height, the actual tension of the web to the set tension, or the actual tension of the web. The nozzle wind speed can be controlled to the set nozzle wind speed, and there is no need to rely on humans as in the conventional apparatus.

[Brief description of the drawings]

FIG. 1 is a perspective view in which a part of a heat treatment apparatus according to an embodiment of the present invention is omitted.

FIG. 2 is a longitudinal sectional view of the same heat treatment apparatus.

FIG. 3 is a cross-sectional view of the same heat treatment apparatus.

FIG. 4 is a perspective view of a duct with a part being omitted.

FIG. 5 is a partially cut front view of a duct.

FIG. 6 is a side view of a duct in which a duct is not mounted.

FIG. 7 is a bottom view of the duct.

FIG. 8 is a perspective view of a duct.

FIG. 9 is a first specific example of a tension sensor.

FIG. 10 is a second specific example of the tension sensor.

FIG. 11 is a longitudinal sectional view of a heat treatment apparatus showing one embodiment of the present invention.

FIG. 12 is a longitudinal sectional view of the same heat treatment apparatus as viewed from the front.

FIG. 13 is a schematic diagram showing the relationship among web, tension, force by hot air, and floating height.

FIG. 14 is a schematic diagram showing a relationship among an aluminum plate, tension, force by hot air, and floating height.

FIG. 15 is a graph showing the relationship between the force of hot air and the theoretical floating height.

FIG. 16 is a graph showing the relationship between nozzle wind speed and k2 (V).

FIG. 17 is a block diagram showing a control state.

FIG. 18 is a flowchart showing a control state.

FIG. 19 is an explanatory diagram when a laser displacement meter is used.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 heat treatment apparatus 12 chamber 14 insertion port 16 delivery port 18 viewing window 20 fan 22 fan 24 upper nozzle 26 lower nozzle 30 blowout port 34 duct 36 heat exchanger 44 hanging unit 48 duct 56 suction roller 58 tension adjusting roller 60 controller 62 Input device 64 Nozzle wind speed sensor 66 Tension sensor

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masanobu Matsumoto 101, Oji Kawai, Kawai-cho, Kitatsukatsugi-gun, Nara Prefecture Inside of Hirano Tecseed Co., Ltd. JP-A-60-42586 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F26B 13/10-13/22 B65H 23/24

Claims (14)

(57) [Claims] A plurality of nozzles are arranged in a zigzag pattern along the upper and lower sides of a traveling path of a web inside a chamber, and the web carried into the chamber is in a substantially sinusoidal floating state by hot air injected from the nozzles. A heat adjusting device for adjusting a web tension, a wind speed adjusting device for adjusting a wind speed of a nozzle, a set floating height inputting device for inputting a set floating height, and a tension. And the appropriate range of the nozzle wind speed
A proper range input means, in accordance with the has been set floating height input to the set floating height input means to adjust the wind speed of the web tension or the nozzle by the tensioning means or the air velocity adjustment means, the proper range input By means
Therefore, the appropriate range of the input tension and nozzle wind speed
And a control means for controlling the floating height of the web to a set floating height. 2. The method according to claim 1, wherein the web travels inside and outside the chamber.
A plurality of nozzles are staggered along the web, and the web carried into the chamber is
Sine wave floating by hot air injected from
In a heat treatment apparatus for performing heat treatment or drying in a state, a tension adjusting means for adjusting a web tension, a wind speed adjusting means for adjusting a wind speed of a nozzle, and a setting floater for inputting a set floating height.
And a setting input to the setting floating height input means.
Adjust the tension adjustment hand according to the floating height.
Web tension by means of steps or wind speed adjusting means
Or adjust the wind speed of the nozzle and float the web
Control means for controlling the height to the set floating height
The setting floating height input means can input a setting floating height with a fixed width, and the control means can control a web within a range of the setting floating height input by the setting floating height input means. A web heat treatment apparatus characterized in that the floating height of the web is controlled to a set floating height. 3. A plurality of nozzles are arranged in a zigzag pattern along the upper and lower sides of a traveling path of a web inside the chamber, and the web carried into the chamber is in a substantially sinusoidal floating state by hot air jetted from the nozzles. In a heat treatment apparatus that heat-treats or dries, a tension adjusting means for adjusting a web tension, a wind speed adjusting means for adjusting a wind speed of a nozzle, a setting tension input means for inputting a setting tension, and an appropriate floating height. An appropriate range input means for inputting a range; and the tension adjusting means or the wind speed in accordance with a setting tension input to the setting tension input means and an appropriate range of a floating height input to the appropriate range input means. Adjusting web tension or nozzle wind speed by adjusting means The web of the heat treatment apparatus characterized by comprising further a control means for controlling the web tension in setting the tension. 4. The set tension height input means can input a set tension with a constant width, and the control means sets a web tension within a range of the set tension input by the set tension input means. The web heat treatment apparatus according to claim 3, wherein the tension is controlled. 5. A plurality of nozzles are arranged in a zigzag pattern along the upper and lower sides of a web traveling path inside the chamber, and the web carried into the chamber is floated in a substantially sinusoidal wave by hot air injected from the nozzles. In a heat treatment apparatus for performing heat treatment or drying by using, a tension adjusting means for adjusting a web tension, a wind speed adjusting means for adjusting a wind speed of a nozzle, a set nozzle wind speed input means for inputting a set nozzle wind speed, and a floating height An appropriate range input means for inputting an appropriate range of the above, and the tension adjustment in accordance with an appropriate range of the set nozzle wind speed input to the set nozzle wind speed input means and the floating height input to the appropriate range input means. The web tension or the wind speed of the nozzle by means or the wind speed adjusting means The web of the heat treatment apparatus characterized by comprising further a control means for controlling the nozzle wind speed setting nozzle wind speed. 6. The set nozzle wind speed input means is capable of inputting a set nozzle wind speed with a constant width, and the control means is configured to set a nozzle wind speed within a range of the set nozzle wind speed input by the set nozzle wind speed input device. The web heat treatment apparatus according to claim 5 , wherein the apparatus is controlled at a set nozzle wind speed. 7. When the control means adjusts a web tension or a wind speed of a nozzle to control a floating height, a tension or a nozzle wind speed to a set floating height, a set tension or a set nozzle wind speed, the following relationship is established. web of a heat treatment apparatus according to claim 6 according to claims 1, characterized in that to satisfy. T = K1 · V ² / (K2 · H + K3) ^1.78 where T is the web tension, V is the wind speed of the nozzle, and H
Is the set floating height. Also, K1, K2,
K3 is a constant. 8. When the control means adjusts a web tension or a wind speed of a nozzle to control a floating height, a tension or a nozzle wind speed to a set floating height, a set tension or a set nozzle wind speed, the following relationship is established. The web heat treatment apparatus according to any one of claims 1 to 7 , wherein the web heat treatment is performed. T = (L1 · V ³ + L2 · V ² + L3 · V) / (L4 ·
H + L5) ^1.78 where T is the web tension, V is the nozzle wind speed, H
Is the set floating height. Also, L1, L2,
L3, L4, and L5 are constants. 9. A tension detecting means for detecting a tension of a web, and a wind speed detecting means for detecting a wind speed of a nozzle, wherein the control means determines the tension based on the detected values of the tension detecting means and the wind speed detecting means. an adjusting means or the wind speed adjusting means to feedback control, the floating height, tension, or sets the nozzle wind speed floating height, web of claims 1 8, wherein the controller controls the setting tension or set nozzle air velocity Heat treatment equipment. 10. A web of a heat treatment apparatus according to claim 9 according to claims 1, characterized in that for floating the web between the net conveyor traveling bilayer. 11. A vibration size measuring means for measuring a vibration size of a web in a floating state, wherein said control means controls a floating height, a tension or a nozzle wind speed to a set floating height, a set tension or a set nozzle wind speed. The method according to claim 1, wherein the tension adjusting means or the wind speed adjusting means further controls the web tension or the wind speed of the nozzle by feedback control so that the measured value of the vibration dimension measuring means becomes smaller. 9. The web heat treatment apparatus according to 9 . 12. A nozzle in which a plurality of nozzles are arranged in a zigzag pattern along the upper and lower sides of a traveling path of a web inside a chamber, and the web carried into the chamber has a substantially sinusoidal floating state by hot air injected from the nozzles. A heat adjusting device for adjusting the tension of the web; a wind speed adjusting device for adjusting a wind speed of the nozzle; a vibration size measuring device for measuring a vibration size of the web in a floating state; A heat treatment apparatus for a web, comprising: a control unit that feedback-controls a web tension or a wind speed of a nozzle by the tension adjustment unit or the wind speed adjustment unit so that a measurement value of the dimension measurement unit is reduced. 13. A tension adjusting means, comprising: a web suction roller provided in front of the chamber; a web tension adjustment roller provided in the back of the chamber; and a rotation speed of the suction roller and the tension adjustment roller. claim from claim 1, wherein the more becomes possible and speed adjusting means for adjusting the web tension by difference 12
A web heat treatment apparatus as described in the above. 14. The apparatus according to claim 1, wherein the wind speed adjusting means comprises a fan motor of a fan for circulating hot air inside the chamber, and a rotation speed control control means for controlling a rotation speed of the fan motor. To claim 12
A web heat treatment apparatus as described in the above.