JP2001353769A - Method, apparatus, and system for controlling temperature of cooling roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature controlling apparatus which can surely prevent the generation of bedewing in a cooling roll even when a work experience is poor. SOLUTION: A heat pipe type cooling roll 25 is used, a first side temperature resistor 11 is installed in a resin-contact area, and a second side temperature resistor 11' is installed in a resin-non-contact area. In an automatic cooling control panel 43, on the basis of the output signal of the resistor 11 which is transmitted non-contactwise from the rotating roll 25 through a rotary joint 1 and an ambient temperature output from a dew-point instrument 44, when the temperature of the contact area reaches the ambient temperature, an automatic valve for cooling water is changed over from half admission to full admission.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the technical field of a temperature control method, a temperature control device, and a temperature control system of a cooling roll using cooling water.

[0002]

2. Description of the Related Art As one example of a packaging material using a resin, a molten resin such as polyethylene is extruded by a T-die, dropped into a film base material such as polyethylene terephthalate, and hardened by a cooling roll. Has a layer of polyethylene / polyethylene terephthalate. In this case, a polyethylene layer is used as a heat seal layer.

[0003] Further, depending on the specification of the packaging material, an aluminum foil or the like may be added, and the layers may be laminated in a layer structure of polyethylene terephthalate / polyethylene / aluminum / polyethylene.

[0004] In any of these cases, a cooling roll is required to cure the molten resin. The cooling roll passes cooling water made of a chiller or the like into the inside to remove resin heat on the roll surface and cool the resin. However, there are differences in the roll internal structure depending on the cooling capacity.

[0005] The simplest structure is a pipe-shaped roll,
A lid with a hollow shaft is attached, and cooling water is supplied from one shaft and discharged from the other shaft. However, in this structure, a temperature gradient may be generated from one roll surface to the other roll surface. For this reason, the flow rate of cooling water is increased,
Used so that no temperature difference occurs.

[0006]

However, in the above-mentioned conventional method, when the temperature of the cooling water is low or when the flow rate of the cooling water is large, depending on the seasonal or day-night ambient temperature and the difference in humidity. In some cases, the surface of the roll that is not in contact with the molten resin becomes lower than the dew point, and dew condensation may occur on a part of the roll surface.

At this time, since the roll is continuously rotating, water droplets at the dew condensation portion flow into the molten resin side or the base material,
In some cases, the sealing strength or the bonding strength was insufficient, or the appearance was poor.

[0008] For this reason, the operator relies on years of intuition, manually adjusting the temperature and flow rate of the cooling water, and making an effort to prevent this.

However, since the line speed is determined depending on the surface temperature of the roll by the cooling water, even if the extruder has the ability to increase the extrusion amount,
In the transport of a substrate, even if it has a sufficient capacity, it is not possible to grasp the optimum amount of cooling water, so that it is impossible to utilize these capabilities.

As the cooling roll, a spiral cooling roll provided with a spiral cooling water pipe inside so as to make the temperature of the roll surface uniform may be used.

However, even when such a spiral cooling roll is used, dew condensation may occur on the roll surface where the molten resin is not in contact. Therefore, the cooling roll must be stopped or rotated during each rotation. However, it was not possible to improve the line speed.

Therefore, by attaching a temperature sensor to the above-mentioned roll and detecting the roll surface temperature,
A method of adjusting the flow rate of cooling water has been proposed.

However, since the cooling water flows just below the surface of the conventional cooling roll, the conventional cooling roll is susceptible to a change in the flow rate of the cooling water, and it is difficult to finely adjust the cooling water. There was a problem of not getting.

Further, since the cooling roll is a rotating body, when measuring the temperature using a temperature sensor, it is necessary to transmit the output signal of the temperature sensor provided on the rotating side to the stationary side. Conventionally, as this transmission method, there is no other way than to use a contact-type slip ring, which causes wear, loss of signal, contamination of noise, etc., and a problem that high-precision measurement cannot be performed for a long time. there were.

The present invention has been made to solve the above problems and to provide a temperature control method, a temperature control device, and a temperature control system capable of reliably preventing the occurrence of dew condensation on a cooling roll even when the working experience is small. It is an issue.

[0016]

According to the first aspect of the present invention, there is provided a cooling roll temperature control apparatus, a cooling roll temperature control apparatus, and a cooling roll temperature control apparatus. For example, when the object to be cooled is supplied onto the cooling roll, the object to be cooled is cooled by the refrigerant layer via the roll body. When the supply amount of cooling water to the straight pipe of the cooling roll is small, the surface temperature of the cooling roll changes relatively sharply in accordance with the supply amount of cooling water, When the supply amount of the cooling water increases, the width of the change corresponding to the supply amount of the cooling water decreases.

Therefore, after the start of the supply of the cooling water, since the change width of the surface temperature of the cooling roll corresponding to the supply amount of the cooling water is large as described above, the maximum supply amount of the cooling water by the cooling water supply means is set. The cooling water is supplied at a half of the supply amount to prevent an extreme decrease in the surface temperature. As a result, dew condensation in the non-contact area of the cooling roll with the object to be cooled is prevented. Next, after the supply of the cooling water is started, when the temperature of the contact area detected by the temperature detecting means reaches the ambient temperature, the supply of the cooling water by the cooling water supply means is switched to the maximum supply amount. . That is,
By the time the temperature of the contact area reaches the ambient temperature,
Although the supply amount of the object to be cooled increases, the supply amount of the cooling water is switched to the maximum supply amount, so that the surface temperature is suppressed to a temperature lower than an upper limit temperature at which overheating is performed.
Further, since the switching timing to the maximum supply amount is when the temperature of the contact area detected by the temperature detecting means has reached the ambient temperature, the temperature in the non-contact area has also reached the dew point temperature or higher, and the maximum Dew condensation in the non-contact area is prevented even immediately after switching to the supply amount.

As described above, appropriate temperature control of the cooling roll can be performed only by switching the supply amount of the cooling water to the maximum supply amount and half of the maximum supply amount. Can be facilitated.

According to the cooling roll temperature control method of the second aspect, the cooling roll temperature control device of the seventh aspect, and the cooling roll temperature control system of the twelfth aspect, an object to be cooled is placed on the cooling roll. When supplied, the object to be cooled is cooled by the refrigerant layer via the roll body. When the supply amount of cooling water to the straight pipe of the cooling roll is small, the surface temperature of the cooling roll changes relatively sharply in accordance with the supply amount of cooling water, When the supply amount of the cooling water increases, the width of the change corresponding to the supply amount of the cooling water decreases.

Therefore, after the start of the supply of the cooling water, since the variation width of the surface temperature of the cooling roll corresponding to the supply amount of the cooling water is large as described above, the maximum supply amount of the cooling water by the cooling water supply means is set. The cooling water is supplied at a half of the supply amount to prevent an extreme decrease in the surface temperature. As a result, dew condensation in the non-contact area of the cooling roll with the object to be cooled is prevented. Next, after the supply of the cooling water is started, when the temperature of the contact area detected by the temperature detecting means reaches the ambient temperature, the supply of the cooling water by the cooling water supply means is switched to the maximum supply amount. . That is,
By the time the temperature of the contact area reaches the ambient temperature,
Although the supply amount of the object to be cooled increases, the supply amount of the cooling water is switched to the maximum supply amount, so that the surface temperature is suppressed to a temperature lower than an upper limit temperature at which overheating is performed.
Further, since the switching timing to the maximum supply amount is when the temperature of the non-contact area detected by the temperature detecting means has reached a predetermined temperature equal to or higher than the dew point, the switching to the maximum supply amount is not performed immediately after switching to the maximum supply amount. Dew condensation in the contact area is prevented.

As described above, appropriate temperature control of the cooling roll can be performed only by switching the supply amount of the cooling water to the maximum supply amount and half the maximum supply amount. Can be facilitated.

According to the cooling roll temperature control method of the third aspect and the cooling roll temperature control device of the eighth aspect, when the object to be cooled is supplied onto the cooling roll, the object to be cooled becomes a roll. Cooled by the refrigerant layer through the body. When the supply amount of cooling water to the straight pipe of the cooling roll is small, the surface temperature of the cooling roll changes relatively sharply in accordance with the supply amount of cooling water, When the supply amount of the cooling water increases, the width of the change corresponding to the supply amount of the cooling water decreases.

Therefore, after the start of the supply of the cooling water, since the variation width of the surface temperature of the cooling roll corresponding to the supply amount of the cooling water is large as described above, the maximum supply amount of the cooling water by the cooling water supply means is set. The cooling water is supplied at a half of the supply amount to prevent an extreme decrease in the surface temperature. As a result, dew condensation in the non-contact area of the cooling roll with the object to be cooled is prevented. Next, after the supply of the cooling water is started, when the supply amount of the object to be cooled per unit time is in a steady state, or after a lapse of a predetermined time from the start of the supply, the supply of the cooling water by the cooling water supply unit is performed. Is switched to the maximum supply amount. In other words, when the temperature of the contact area reaches the ambient temperature, the supply amount of the object to be cooled also increases, but the supply amount of the cooling water is switched to the maximum supply amount. The temperature is kept lower than the upper limit temperature at which overheating occurs. The switching timing to the maximum supply amount is performed when the supply amount of the object to be cooled per unit time is in a steady state or after a predetermined time has elapsed from the start of the supply. And dew condensation in the non-contact area is prevented even immediately after switching to the maximum supply amount.

As described above, appropriate temperature control of the cooling roll can be performed only by switching the supply amount of the cooling water to the maximum supply amount and half of the maximum supply amount. Can be facilitated.

According to the cooling roll temperature control method according to the fourth aspect, the cooling roll temperature control device according to the ninth aspect, and the cooling roll temperature control system according to the thirteenth aspect, the straight pipe can be controlled by the following method. The cooling water is supplied to the straight pipe at a supply amount that is half the maximum supply amount or the maximum supply amount. Then, the supply amount is switched.

According to the cooling roll temperature control method according to the fifth aspect, the cooling roll temperature control device according to the tenth aspect, and the cooling roll temperature control system according to the fourteenth aspect, the straight pipe can be disposed in the same direction. By setting one of the two supply paths to a fully open state and the other to a fully closed state, supply is performed at a supply amount that is half of the maximum supply amount. Is fully opened, the supply at the maximum supply amount is performed, so that the supply amount is reliably switched by simple control.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing a schematic configuration of an extrusion-type laminating machine using a rotary joint for transmitting measurement information as one embodiment of the present invention.

As shown in FIG. 1, the extrusion type laminating machine of the present embodiment is provided with a sheet supply section 20 for supplying PET as a base material. The PET 21 supplied from the sheet supply unit 20 reaches the laminating unit via the transport path 22 and is configured to face the T die 23 in the laminating unit. The molten polyethylene is supplied to the T die 23 from the upper hopper 24, and the polyethylene supplied from the T die 23 is applied on the PET 21. And PET
The polyethylene applied on 21 is immediately cooled by cooling roll 25 and adheres to PET 21. The sheet formed into two layers by such a lamination process is conveyed to a winding unit 27 via a conveying unit 26, and is wound by the winding unit 27.

In order to carry out good laminating processing in such a laminating machine, it is important to maintain the surface temperature of the cooling roll 25 at a predetermined value, and the following cooling roll 25 is used.

FIG. 2 shows a cooling roll 2 according to this embodiment.
5 is a partially broken perspective view showing a schematic configuration of No. 5; FIG. As shown in FIG. 2, a plurality of pipes 30 for supplying cooling water are arranged inside the roll, and between the pipes 30 and the roll surface 31, steam of a working fluid as a refrigerant layer is provided. A phase is provided, and the temperature of the roll surface end is only 5 to 8 ° C. lower than that of the intermediate portion. For example, if the surface temperature of the intermediate portion of the roll is 36 ° C.,
３１31 ° C. Therefore, by setting this temperature to be equal to or higher than the dew point of the surrounding air, dew condensation by the cooling roll 25 can be completely prevented. In this embodiment, the diameter of the cooling roll 25 is set to 600 m.
m, the length was 2000 mm, and the diameter of a rotating shaft connected to a rotary joint described later was 15 mm. The cooling water temperature was 15 ° C.

Further, since the surface 31 of the cooling roll 25 is not only uniform in temperature but also mirror-finished, the transparency of the sheet to be laminated is made uniform over the entire width.

In the cooling roll 25,
In order to maintain the surface temperature at a predetermined appropriate temperature, FIG.
As shown in (A), a temperature measuring resistor 11 as first temperature detecting means made of platinum on the surface layer of the cooling roll 25;
A temperature measuring resistor 11 ′ is also embedded as second temperature detecting means also made of platinum, and measurement information of the temperature measuring resistors 11 and 11 ′ is transferred from the rotating side to the stationary side using the rotary joint 1 for transmitting measurement information. The surface temperature is maintained at a desired temperature by transmitting and controlling the flow rate of the cooling water based on the measurement information. The cooling water is as shown in FIG.
The cooling water is supplied through a rotary joint 33 for supplying cooling water, passes through a hollow shaft provided in the rotary joint 1 for transmitting measurement information, and further reaches the pipe 30 through the rotating shaft 32 of the cooling roll 25.

Hereinafter, the configuration of the rotary joint 1 for transmitting measurement information according to the present embodiment will be described with reference to FIGS.
This will be described in detail using FIG.

FIG. 3A is a plan view showing an entire cooling roll unit to which a hollow type rotary joint 1 for transmitting measurement information and a rotary joint 33 for supplying cooling water according to an embodiment of the present invention are attached. 3 (B)
Is a cooling unit to which a shaft end type rotary joint is attached, and FIG. 3C is a plan view showing the whole of a normal cooling roll unit without a temperature sensor. FIG. 4 is a cross-sectional view of a half of the rotary joint 1 for transmitting measurement information of the present embodiment from a rotation center axis, and a plan view of the other half. FIG. 5 is a block diagram showing an electrical connection relationship between each circuit, the antenna member, and the power transmission coupler in the rotary joint 1 for transmitting measurement information of the present embodiment. The rotation center axis L shown in FIG.
It coincides with the rotation center axis L shown in (A), (B), and (C).

As shown in FIG. 4, the rotary joint 1 for transmitting measurement information of the present embodiment comprises a hollow shaft 2 having a shaft end 2a on the side of the cooling roll 25 and a shaft end 2b on the side of the rotary joint 33 for supplying cooling water. A ring 3a, 3b fitted to the outer periphery of the hollow shaft 2, a first housing member 4 fitted to the rings 3a, 3b and having a flange portion 4a and a body portion 4b, bearings 5a, 5b, The ring 6a is supported by the first housing member 4 via bearings 5a and 5b.
A second housing member 6 having a flange portion 6b and a cylindrical wall 6c; support plates 15a and 15b attached to the body portion 4b of the first housing member 4; and a flange portion 6b of the second housing member 6. Support plate 15
c and the electric circuit unit 12 supported by the support plate 15a
The first ferrite core coil unit 18 and the first antenna member 13 supported by the support plate 15b;
5c supported second ferrite core coil unit 1
9 and a second antenna member 14.

The hollow shaft 2 is an iron shaft in which a hollow hole 2c as a cooling water supply passage is formed. The hollow shaft 2 has a maximum thickness of about 30 mm and can withstand a water pressure of about 7 kg / cm 2. It is configured. The shaft end 2 a of the hollow shaft 2 on the side of the cooling roll 25 is fitted to the rotating shaft 32 of the cooling roll 25, and is firmly attached to the rotating shaft 32 by a bolt 34 inserted into a bolt hole 2 d provided in the hollow shaft 2. It is attached. Therefore, when the cooling roll 25 is rotationally driven, the hollow shaft 2 is also rotationally driven. Further, a threaded portion 2e is formed on the other shaft end 2b,
The cooling water supply rotary joint 33 formed with a corresponding threaded portion can be screwed to the shaft end 2b.

Rings 3a, 3b made of stainless steel are provided on the outer periphery of the hollow shaft 2 near the shaft ends 2a, 2b.
Are fitted and attached. And this ring 3a,
When the first housing member 4 is fitted and attached to 3b, an air space 3c is formed between the first housing member 4 and the hollow shaft 2. When the cooling water having the above-mentioned temperature is supplied to the hollow hole 2c of the hollow shaft 2, dew condensation may occur on the outer surface of the hollow shaft 2, but the air layer 3c prevents the influence of the dew on the electric circuit and the like. . The first housing member 4 is made of aluminum whose surface is anodized, and has a flange portion 4a and a body portion 4b.
And The inner ring of the bearing 5a is fitted to the flange 4a, and the inner ring of the bearing 5b is fitted to the body 4b.

The second housing member 6 is also made of aluminum, and the surface of the cylindrical wall 6c is anodized. The ring 6a of the second housing member is fitted to the outer ring of the bearing 5a, and the flange 6b of the second housing member 6 is fitted to the outer ring of the bearing 5b. Therefore, when the hollow shaft 2 rotates with the rotation of the cooling roll 25, the first flange member 4 rotates with respect to the second flange member 6.

The body portion 4b of the first flange member 4 which rotates in this way is provided with hollow disk-shaped stainless steel support plates 15a and 15b provided substantially perpendicular to the rotation center axis L. The electric circuit unit 1 is provided on the support plate 15a.
2, and a first antenna member 13 for signal transmission and a first ferrite core coil unit 18 are attached to the support plate 15b.

The electric circuit unit 12 comprises a power supply converter 7, a resistance temperature converter 8, an A / F converter 9 and an F signal transmitter 10 shown in FIG. Reference numerals 11 and 11 'are electrically connected to the resistance temperature converter 8 in the electric circuit unit 12 via cables and connectors (not shown). Further, the resistance temperature converter 8 is electrically connected to the A / F converter 9, and the A / F converter 9 is electrically connected to the F signal transmitter 10. The F signal transmitter 10 is connected to the first antenna member 13. It is electrically connected.

The first antenna member 13 is a member in which a wiring pattern as an antenna terminal is formed on a ring-shaped printed circuit board, and is attached to a support plate 15b via a support 13a. The measurement information signal output from the F signal transmitter 10 is a signal frequency-modulated by a carrier frequency of 300 to 700 MHz, and is transmitted from the first antenna member 13 to a second antenna member 14 described later.

The first ferrite core coil unit 18 supported by the support plate 15b as a support member together with the first antenna member 13 has a coil in a ferrite core as described later. It is electrically connected to the power converter 7 in the electric circuit unit 12. An induced electromotive force is generated in the coil of the first ferrite core coil unit 18 by the action of mutual induction as described later, and the induced electromotive force is supplied to the power converter 7. Thereby, stable power is supplied to the resistance temperature converter 8, the A / F converter 9, and the F signal transmitter 10 constituting the electric circuit unit 12.

On the other hand, a hollow disk-shaped support plate 15c made of stainless steel is also attached to the flange portion 6b of the second housing member 6, and the support plate 15c has
The second antenna member 14 and the second ferrite core coil unit 19 are supported.

Similarly to the first antenna member 13, the second antenna member 14 is a member in which a wiring pattern as an antenna terminal is formed on a ring-shaped printed circuit board, and is attached to a support plate 15c via a support base 14a. ing. The second antenna member 14 is arranged to face the first antenna member 13 with a gap of 0.5 mm to 1 mm, and the first antenna member 13 rotates with the rotation of the first housing member 4. The signal to be transmitted is input by the second antenna member 14. The input signal is received by the receiver 40 on the stationary side as shown in FIG.
The signal is converted into a signal having an analog voltage value by the A converter 41 and used as measurement information.

The supporting plate 6d as a supporting member includes
A second ferrite core coil unit 19 is attached to face the first ferrite core coil unit 18. Second ferrite core coil unit 1
9 has a coil in the ferrite core, as described later, similarly to the first ferrite core coil unit 18, and this coil is electrically connected to the stationary power converter 42 as shown in FIG. Have been. The first ferrite core coil unit 18 and the second ferrite core coil unit 19 are opposed to each other with a gap of 0.5 mm to 1 mm. A magnetic field is generated in the ferrite core coil unit 19, and an induced electromotive force is generated in the first ferrite core coil unit 18 by the mutual induction.

As described above, the first ferrite core coil unit 18 and the second ferrite core coil unit 1
Reference numeral 9 denotes a power transmission coupler for transmitting power using electromotive force generated by mutual induction (electromagnetic induction). In the present embodiment, a semi-cylindrical split ferrite core as shown in FIG. In the first ferrite core coil unit 18 on the rotating side and the second ferrite core coil unit 19 on the stationary side, fifteen are arranged annularly as shown in FIG. The core coil 51 is mounted.

The semi-cylindrical split ferrite core 50 used in the present embodiment is generally used for a clamp filter used for shielding a cable.
When used for a clamp filter, two half-cylindrical split ferrite cores 50 are used in combination as shown in FIG. The semi-cylindrical split ferrite core 50 used for such a clamp filter is:
As shown in FIG. 6 (A), it is necessary to reliably prevent the leakage of magnetic flux at the time of matching, so that the processing accuracy of the surface is high and the dimensional accuracy is high. Therefore, as shown in FIG. 7, even when each of the split ferrite cores 50 is annularly arranged on the support plates 15b and 15c, the heights from the support plates 15b and 15c can be made uniform. As a result, even when the second ferrite core coil unit 19 is set to the primary side and the first ferrite core coil unit 18 is set to the secondary side, they are coaxially opposed as shown in FIG. Can be kept constant.

Support plate 15 of split type ferrite core 50
For mounting to b and 15c, a two-part epoxy adhesive that can be bonded at a low temperature was used. When an adhesive that bonds at a high temperature is used, cracks or the like may occur in the divided ferrite core 50 that is a fired product during cooling. However, in the present embodiment, the split ferrite core 50 can be bonded at a low temperature. Such cracks and the like do not occur.

Since the support plates 15b and 15c are made of non-magnetic stainless steel as described above,
Even if the magnetic flux changes, no heat is generated, and the split ferrite core 50 is not separated from the support plates 15b and 15c.

As described above, the split type ferrite core 50 annularly arranged on the support plates 15b and 15c has
As shown in (A), a central recess 50 penetrating from one end face 50b to the other end face 50c of the split type ferrite core 50.
a is formed. The split type ferrite core 50 is shown in FIG.
And by arranging them in an annular shape as shown in FIG.
The storage path for the coil consisting of a is formed in an annular shape, and the coil 51 is mounted in the storage path. In the present embodiment, the stationary side second ferrite core coil unit 19 is set as the primary side, and the center concave portion 50a of the split ferrite core 50 constituting the second ferrite core coil unit 19 is provided with a biferral wound air core coil 51. Attach. A normally wound air-core coil 51 is mounted in the center recess 50a of the split ferrite core 50 that constitutes the secondary side ferrite core coil unit 18 on the secondary side.

The power supply is transmitted in a non-contact manner based on the principle of mutual induction (electromagnetic induction), but the stationary side is configured to transmit a deformed high-frequency signal based on a pulse-like waveform. On the other hand, on the rotating side, the ripple-like power supply fluctuation is rectified and adjusted to a predetermined power supply voltage by a DC / DC converter or the like.

In this case, as shown in FIG. 8A, if the primary and secondary coils are normally wound, the primary side signal is turned on / off, and as shown in FIG.
The power is transmitted at a frequency around z, but in this case, the ratio of the stop time is high, and the transmission efficiency is deteriorated.

Therefore, in the present embodiment, FIG.
As shown in (A), the primary side is bi-ferrule wound,
By making the secondary side a normal winding, the primary side is alternately turned on / off alternately, and as shown in FIG.
As a frequency around kHz, the secondary side synthesizes the frequency to increase the efficiency.

In this embodiment, the split type ferrite core 5
By mounting the air-core coil 51 wound about 30 turns in the center recess 50a of 0, transmission of power by the principle of mutual induction as described above is enabled. Air core coil 51
A so-called alcohol fusion wire, in which a surface of a coil formed of a copper wire is coated with a resin that melts with methyl alcohol, is used. In the present embodiment, the alcohol fusion wire is wound by a winding device for about 30 turns and then immersed in methyl alcohol. This allows
The resin coated on the surface of the coil is melted, and the entire air-core coil 51 is solidified. The thus hardened air-core coil 51 is bonded to the central recess 50a with an epoxy-based adhesive. Therefore, the air-core coil 51
7 presses the entire split type ferrite core 50 as shown in FIG.
b, 15c.

As described above, in the present embodiment, in the first ferrite core coil unit 18 on the rotating side, the semi-cylindrical divided ferrite core 50 is formed by one.
In the second ferrite core coil unit 19 on the stationary side, five semi-cylindrical split ferrite cores 50 are annularly arranged using the five ferrite cores 50, and the center of the split ferrite core 50 30 in the recess 50a
Since a pair of ferrite core coil units is configured by mounting the air core coil 51 of about a turn, a power transmission coupler with very little leakage of magnetic flux can be configured as in the case of using a pot type ferrite core.

Further, in the present embodiment, the first antenna member 13, the second antenna member 14, the first ferrite core coil unit 18 and the second ferrite core coil unit 19 are provided concentrically, so that they are further improved. The arrangement space in the rotation axis direction can have a margin. As described above, the power transmission coupler and the antenna member can be mixed in the same section because the signal transmission frequency of the antenna member is 300 to 700 MHz.
This is because the transmission frequency of the power supply by the power transmission coupler is 20 kHz to 30 kHz, but does not interfere with each other.

Next, a method of controlling the temperature of the cooling roll in the present embodiment will be described with reference to FIGS.

In the present embodiment, as described above,
From the T-die 23 to the surface of the cooling roll 25,
A molten resin such as polyethylene at about 0 ° C. is supplied.
Cools down to about ° C and hardens. And the cooling roll 25
The contact area with the molten resin on the surface of the cooling roll 25 does not extend over the entire area in the longitudinal direction of the cooling roll 25, as shown by hatching in FIG. Exists. Since the non-contact area is not affected by the heat of the molten resin, the surface temperature is lower than that of the contact area. Therefore, when the surface temperature of the contact area decreases due to an increase in the flow rate of the cooling water or the like, the surface temperature of the non-contact area may be lower than the dew point. Therefore, in the present embodiment, FIG.
As shown in the figure, not only the temperature measuring resistor 11 is buried in the surface layer of the cooling roll 25 in the contact area, but also the temperature measuring resistor 11 ′ is buried in the non-contact area. By controlling the flow rate of the cooling water so that the temperature measured by the temperature resistor 11 'is equal to or higher than the dew point, the occurrence of dew condensation is prevented.

As shown in FIG. 5, the resistance temperature detectors 11 and 11 'are connected to the resistance temperature converter 8 through a rotating connector (not shown), and the resistance value of the resistance temperature detectors 11 and 11' is changed. Is converted into a current in the resistance temperature converter 8.
Further, this current is converted into a predetermined frequency pulse signal in the A / F converter 9 according to the value. In the present embodiment, the resistance thermometers 11 and 11 ′ are 100
The output signal converted into a current by the resistance temperature converter 8 is 4 to 20 mA for a temperature of 0 ° C. to 100 ° C. Further, 300 to 700 MHz is used as the carrier frequency. And
This frequency pulse signal is frequency-modulated in the F signal transmitter 10 and transmitted from the first antenna member 13.
In the present embodiment, the transmission rate is set to 2 Mbps. On the other hand, the signal transmitted in this manner is received by the stationary receiver 40 via the second antenna member 14, and is converted into a current by the F / A converter 41.

The signal thus converted is input to the control means 43, and the control means 43 performs temperature control based on the signal. As described above, since the signal transmission is performed through the non-contact first antenna member 13 and the second antenna member 14, the resistance value change of the resistance temperature detectors 11 and 11 ′ provided on the rotating side can be accurately performed. Detection can be performed on the stationary side. In the present embodiment, when the cooling roll 25 is rotated at 100 rpm, the rotating portion of the rotary joint 1 for transmitting measurement information is also rotated at 100 rpm.
Although it rotates at rpm, even in this case, since the transmission unit is in non-contact, there is no deterioration due to wear and the like, and good temperature detection is possible over a long period of time.

In the example shown in FIG. 10, a signal indicating a change in the resistance value of the resistance temperature detectors 11 and 11 ′ transmitted from the rotating side to the stationary side via the rotary joint 1 is transmitted via the antenna members 13 and 14. The receiving unit 4 transmitted from the rotating side to the stationary side and including the receiver 40 and the F / A converter 41
After passing through 0 ', it is supplied to a cooling automatic control panel 43 as control means.

The automatic cooling control panel 43 has a temperature indicator controller 43a for setting the control temperature of the cooling water, and a second temperature indicator 43a for displaying the temperature of the contact area based on the change in the resistance value of the resistance temperature detector 11. A first indicator 43b and a second indicator 43c for displaying the temperature of the non-contact area based on a change in the resistance value of the resistance bulb 11 'are provided.

The automatic cooling control panel 43 is connected to a dew point meter 44 as a dew point detecting means. The dew point meter 4
4 is connected to a sensor 45 for detecting the temperature and humidity around the cooling roll 25, and calculates the dew point based on the temperature and humidity. Also, a signal indicating the ambient temperature is output as an output signal. The calculated dew point information is input to the automatic cooling control panel 43 and displayed on the second indicator 43c together with the temperature of the non-contact area.
Further, the ambient temperature is displayed on the first indicator 43b together with the temperature of the contact area.

A control means such as a CPU is provided inside the automatic cooling control panel 43 to control the temperature of the non-contact area,
The calculated dew point is always compared with the calculated dew point. Immediately after the start of the cooling process, a control signal is sent to the automatic valve 46 to control the automatic valve to half open. Then, when the temperature of the contact area reaches the ambient temperature, a control signal is sent to the automatic valve 46 to control the automatic valve to be fully opened.

The chiller 45 serving as cooling water adjusting means is a means for supplying cooling water, and the flow rate of the cooling water supplied from the chiller 45 is controlled by an automatic valve 46.
Therefore, by adjusting the automatic valve 46 according to the control signal from the automatic cooling control panel 43, the flow rate of the cooling water can be appropriately adjusted.

The cooling water whose flow rate has been adjusted as described above is supplied to the pipe 30 in the cooling roll 25 via the cooling water supply rotary joint 33, and the surface temperature of the cooling roll 25 changes to a predetermined temperature. Will do.

Here, the relationship between the dew point and the temperature of the non-contact area and the relationship between the upper limit temperature and the temperature of the contact area will be described in detail with reference to FIG.

When the molten resin is supplied onto the cooling roll 25 as shown by the diagonal lines in FIG. 11A, the distribution of the surface temperature of the cooling roll 25 becomes as shown in FIG. Shows a distribution that is low in the area and high in the contact area. When the temperature of the non-contact area is lower than the dew point C as shown in FIG. 11D, dew condensation occurs in the non-contact area. On the other hand, when the temperature of the contact
When the temperature is higher than the temperature A as shown in (E), the resin is not cured, and problems such as winding around the cooling roll 25 occur.

Therefore, when the temperature at which the wrapping around the cooling roll 25 occurs is set as the upper limit temperature A and the temperature at which the dew condensation occurs is set as the lower limit temperature B, the surface temperature of the cooling roll 25 becomes lower. It is necessary to control the distribution so that the distribution falls within the range between the upper limit temperature A and the lower limit temperature B as shown in FIG.

Here, the characteristics of the heat pipe type cooling roll 25 used in this embodiment will be described. FIG.
2 (A) (i) shows the case where the heat load on the cooling roll 25 is small, and FIG. 12 (A) (ii) shows the case where the heat load on the cooling roll 25 is large. As can be seen from FIG. 12 (B), when the heat load on the cooling roll 25 is small, appropriate cooling is possible even when the amount of cooling water is small, but when the heat load on the cooling roll 25 is large, If the amount of cooling water is not increased, proper cooling cannot be performed. However, in any case, in the heat pipe type cooling roll 25, FIG.
As shown in (i) and (ii), the temperature difference between the contact region and the non-contact region is substantially constant, and the temperature of the non-contact region does not become extremely low even when the amount of cooling water is increased.

On the other hand, when the conventional spiral cooling roll is used, there is no problem when the heat load on the cooling roll is small as shown in FIGS. (A) As shown in (iv), when the heat load on the cooling roll 25 is large, that is, when the amount of cooling water is increased, the temperature of the non-contact area is extremely lower than the temperature of the contact area. And may fall below the dew point. As a result, dew condensation occurs in the non-contact area. This is a method of cooling the surface temperature of the cooling roll directly with cooling water in the spiral cooling roll,
This is because the surface temperature of the cooling roll is easily affected by the temperature of the cooling water.

As can be seen from FIG. 12 (B), when the flow rate of the cooling water is 5 m ³ / min or less, the change width of the surface temperature with respect to the flow rate of the cooling water is large. However, when the flow rate of the cooling water is as large as 10 m ³ / min or more, the variation width of the surface temperature with respect to the flow rate of the cooling water is small.

That is, as in the beginning of the cooling process, during the period when the flow rate of the cooling water is small, the change in the surface temperature is large relative to the flow rate of the cooling water. There is. If a large amount of cooling water is suddenly supplied during this period, the temperature rapidly changes and becomes lower than the dew point, and dew condensation occurs. However, after reaching a certain flow rate, even if the flow rate of the cooling water changes slightly,
The surface temperature does not change much. At least after reaching a certain flow rate, the temperature of the non-contact area is also sufficiently higher than the dew point. Therefore, even if the flow rate of the cooling water is extremely increased, no dew condensation occurs.

When the characteristics of the heat pipe type cooling roll 25 are examined in more detail, as shown in FIG. 13 (A), when the automatic valve 63 is fully opened and temperature control is performed from the beginning of the cooling process. At the beginning of the treatment, when the amount of resin is small, the temperature of the contact area becomes very close to the dew point. In addition, when the temperature is controlled by opening the automatic valve 63 halfway from the beginning of the cooling process, the temperature of the contact area is sufficiently higher than the dew point even at the beginning of the process with a small amount of resin. .

Further, regarding the non-contact area, FIG.
As shown in (A), when the temperature control is performed by fully opening the automatic valve 63 from the beginning of the cooling process, the resin amount is small.
At the beginning of the process, the temperature of the non-contact area is lower than the dew point, and dew condensation occurs. However, when the amount of resin reaches a certain amount after a while, the temperature of the non-contact area becomes a temperature slightly higher than the dew point. When the temperature control is performed with the automatic valve 63 half-opened from the beginning of the cooling process, when the amount of resin is small, at the beginning of the process, the temperature of the non-contact area is almost the temperature of the dew point, After a while, when the amount of the resin reaches a certain amount, the temperature of the non-contact area becomes sufficiently higher than the dew point.

From the above-described examination results, in the present embodiment, when the control is performed with the automatic valve 63 fully opened, the temperature of the non-contact area slightly exceeds the dew point when the temperature of the contact area exceeds the dew point. It was found that it was time to reach the temperature of 25 ° C.

Therefore, in the present embodiment, the automatic cooling control panel 43 controls the automatic valve 46 to be half-opened at the beginning of the cooling process as shown in FIG.
When the detected temperature of the first resistance temperature detector 11 reached 25 ° C., the automatic valve 46 was controlled to be fully opened as shown in FIG. Even when such a simple control is performed, it is possible to prevent the occurrence of dew condensation in the non-contact area, and to perform an appropriate cooling process.

According to the present embodiment, while the temperature of the non-contact area is always higher than the dew point, the amount of cooling water can be increased as compared with the conventional case, and as shown in FIG. The line speed, which was 150 m ³ / min
It can be increased to 30 m ³ / min, and the processing capacity of the system can be improved.

Further, the control of the temperature of the cooling roll, which has conventionally relied on the intuition of the operator for many years, can be replaced with extremely simple control, and anyone can operate it. In the above-described embodiment, the cooling automatic control panel 43
In the above, an example in which the control temperature is automatically set has been described. However, the operator operates the temperature indicating controller 43a so as to open the automatic valve 46 halfway or fully open while watching the temperature of the indicator. May be.

The above-described embodiment is similar to the embodiment shown in FIG.
As shown in FIG. 13, an example has been described in which the automatic valve 46 is controlled to half open and full open when the cooling water supply path from the chiller 45 to the cooling roll 25 is single, but as shown in FIG. The cooling water supply path from the chiller 45 to the cooling roll 25 is divided into two, and the automatic valve 46a is fully opened and the automatic valve 46b is fully closed.
6b may be fully opened. Also in this case, as shown in FIG. 13C, the same control as in the case of a single cooling water supply path is performed.

A bypass 47 is provided in the cooling water supply path as shown in FIG. 10 so that the supply amount of the cooling water from the bypass 47 is adjusted according to the open / close state of the automatic valve 46. Is configured. That is, the supply amount of the cooling water from the chiller 45 is configured to be always constant. Therefore, as in the present embodiment, the automatic valve 4
Even when control is performed to switch the valve 6 between half-open and full-open, the cost related to the cooling water is the same as the conventional cost. In other words, the present invention does not increase costs,
This simplifies the control.

In the above example, when the temperature of the contact area reaches the ambient temperature, the automatic valve 46 is switched between half open and full open. For example, as shown in FIG. The switching may be performed when the temperature of the contact area becomes sufficiently higher than the dew point. FIG. 13 shows a system in which the amount of increase in the amount of resin increases with time.
In the case of a system in which the resin amount is in a steady state near the flow rate change point shown in (A), the system may be switched when the resin amount becomes in a steady state. The determination as to whether or not a steady state has been made may be made by the operator, or a timer or the like may be used.

In this embodiment, the bearing 5 described above is used.
a, all connectors (not shown) are water-resistant, and the first housing member 4 and the second housing member 6 cover the electric circuit unit 12, the power transmission coupler, and the antenna member in a substantially sealed state. Therefore, even if the rotary joint 1 of the present embodiment is used for the cooling roller 25 using cooling water, there is no danger of a failure of an electric circuit or the like due to water and a leakage accident.

Further, the power is converted from AC 100 V to DC 28 V in the stationary power converter 42 and supplied at a frequency of 30 kHz to the bifilar-wound coil 51 in the second ferrite core coil unit 19 on the primary side. . As a result, a pulsed current flows through the coil 51 of the second ferrite core coil unit 19, and a magnetic flux that changes according to a change in the current passes through the coil 51 of the second ferrite core coil unit 19. Then, the change in the magnetic flux causes an induced electromotive force in the coil 51 of the first ferrite core coil unit 18 on the secondary side, and is supplied to the power converter 7. In the power converter 7, the DC 24
V and a voltage of ± 15 V DC and supplied to each circuit in the electric circuit unit 12. In the present embodiment, the rotating portion of the rotary joint 1 for transmitting measurement information rotates at a maximum of 1000 rpm. However, since power is supplied in a non-contact manner, no spark such as a slip ring is generated, and the solvent is not generated. No explosion in atmosphere. In addition, since there is no contact, there is no deterioration due to wear and the like, and good power supply can be performed for a long time.

As described above, according to the present embodiment, while the power is stably supplied for a long period of time,
Since the measurement information of 1, 11 ', that is, the change in the resistance value, is transmitted to the stationary side by non-contact, accurate temperature control is performed for a long period of time.

The excellent effect of the rotary joint 1 having the power transmission coupler according to the present embodiment as described above becomes clearer by comparing with the conventional power supply means. For example, the most common example of the means for supplying power to the rotating body is a slip ring. However, since the slip ring has a large frictional resistance, the slip ring has a maximum frictional resistance such as the rotary joint of the present embodiment. In a device requiring a rotation speed of 100 rpm, it is not suitable because it hinders the increase of the rotation speed.
In addition, the contact portion of the slip ring is worn out over a long period of use, so that periodic replacement is required.

On the other hand, since the power transmission coupler of the present embodiment is a non-contact type, it has no frictional resistance and can easily increase the number of revolutions. In addition, since it is a non-contact type, there is no wear and no replacement work is required.

Further, a configuration in which a battery is provided inside the rotating body is also conceivable, but such a configuration requires periodic battery replacement and charging.

On the other hand, since the power transmission coupler of the present embodiment supplies power in a non-contact manner by using electromagnetic induction, there is no need to replace components.

Further, a transformer comprising a pot type ferrite core and a coil is also used as a transformer having any combination of the number of windings on the primary side and the secondary side. The ferrite cores on the side need to be closely attached to each other, and cannot be used for power supply from the stationary side to the rotating side. Generally, after the bobbin with the primary and secondary windings formed integrally is housed in the hollow part of the pot type ferrite core, the two ferrite cores are overlaid, and the epoxy adhesive is used. It is adhered and used as a column in appearance so that the coil is not exposed.

On the other hand, the power transmission coupler of the present embodiment uses a plurality of semi-cylindrical divided ferrite cores, but the space between adjacent cores is made as small as possible to reduce the leakage magnetic flux. It is configured not to leak to a position other than the opposing core. Therefore, even when the primary-side power transmission coupler and the secondary-side power transmission coupler are arranged with a small gap, non-contact power transmission can be performed while suppressing leakage of magnetic flux. As a result, power supply from the stationary side to the rotating side can be easily realized.

It is also conceivable that the above-mentioned pot-type ferrite cores are adhered by an adhesive and the ferrite cores are arranged to face each other in a non-contact manner. However, when a rotary shaft is provided with a hollow shaft for cooling water, The diameter of the hollow portion of the pot-type ferrite core needs to be larger than the diameter of the hollow shaft for cooling water. However, the ferrite core is a fired product and is distorted or warped during the manufacturing process. Such phenomena appear more conspicuously as the size of the core increases, and the amount of deformation increases. Therefore, the large core has a problem that the yield is poor. Further, if the amount of deformation in the manufacturing process is large, post-processing such as polishing is also required, which makes the product extremely expensive. Thus, it is very difficult to increase the size of the pot type ferrite core. It is also conceivable to use a large toroidal core and cut the inside to form a pot shape. However, since the ferrite core is brittle, it is very difficult to perform cutting. Therefore, even if a power transmission coupler in which pot-type ferrite cores are arranged in a non-contact manner is arranged in a rotary joint for transmitting measurement information, the power transmission coupler should be provided concentrically with the antenna member. And must be provided in series. In addition, the rotary joint 35 for transmitting measurement information configured as described above is similar to the rotary joint 35 shown in FIG.
Rotary joint 3 for supplying cooling water as in (B)
It must be arranged at the axial end of the cooling roll 25 behind 3 '.

On the other hand, the power transmission coupler according to the present embodiment has a pot-type configuration in which a semi-cylindrical split type ferrite core originally used for a clamp filter for shielding a cable is annularly arranged. Since a large ferrite core having a similar shape can be formed, a power transmission coupler can be arranged on the outer periphery of the hollow shaft for cooling water. As a result, as is clear from the comparison between FIG. 3A and FIG. 3B, the entire length of the cooling roll unit including the rotary joint is set to the length W (about 300 mm in the example of FIG. 3B). Can be shortened. In addition, the entire length of the cooling roll unit of the present embodiment is longer than that of the conventional cooling roll unit by the amount of the rotary joint 1 for transmitting measurement information. Since it is configured to reduce the length, it is only about 100 mm longer than in the past. Therefore, in a system in which a cooling roll unit is stored in a rack using a crane or the like and the cooling roll unit is exchanged by being transported from the rack, a rack having the same size as the conventional one can be used. It can be used effectively.

Further, in the above-described embodiment, the case where the present invention is applied to the rotary joint for the cooling roll has been described. However, the present invention is not limited to this. Or a rotary joint that supplies gas such as gas, or passes a thick cable or the like through a hollow shaft. In this case, a heat insulating material may be provided at the position of the air layer 3c depending on the situation. However, in particular, when the rotary joint for transmitting measurement information of the present invention is applied to a cooling roll using cooling water, since the above-described water-resistant treatment is performed, a particularly excellent effect is exhibited. is there.

In the above-described embodiment, the number of the split type ferrite cores is set to 16 as an example.
The present invention is not limited to this, and may be an appropriate number according to the size of the split type ferrite core to be used or the size of the diameter of the power transmission coupler. Also, the number of turns of the coil was set to about 30 turns as an example,
The present invention is not limited to this, and can be appropriately modified.

[0096]

According to the method for controlling the temperature of the cooling roll according to the first aspect, the temperature control apparatus for the cooling roll according to the sixth aspect, and the temperature control apparatus for the cooling roll according to the eleventh aspect, the cooling water is provided. After the start of the supply of the cooling water, the cooling water is supplied at a supply amount of half of the maximum supply amount of the cooling water by the cooling water supply means. Dew condensation in the contact area can be reliably prevented. Further, when the temperature of the contact area detected by the temperature detection means reaches the ambient temperature after the start of the supply of the cooling water, the supply of the cooling water by the cooling water supply means is switched to the maximum supply amount. The temperature can be suppressed to a temperature lower than the upper limit temperature at which overheating occurs. Further, since the switching timing to the maximum supply amount is when the temperature of the contact area detected by the temperature detecting means has reached the ambient temperature, the temperature in the non-contact area has also reached the dew point temperature or higher, and the maximum Immediately after switching to the supply amount, dew condensation in the non-contact area can be prevented. As described above, appropriate temperature control of the cooling roll can be performed simply by switching the supply amount of the cooling water to the maximum supply amount and half of the maximum supply amount. Can be achieved.

According to the cooling roll temperature control method of the second aspect, the cooling roll temperature control apparatus of the seventh aspect, and the cooling roll temperature control system of the twelfth aspect, after the start of the supply of the cooling water, The cooling water is supplied at a supply amount that is half of the maximum supply amount of the cooling water by the cooling water supply means, preventing an extreme decrease in the surface temperature and reliably forming dew condensation in the non-contact area of the cooling roll with the object to be cooled. Can be prevented. Further, after the start of the supply of the cooling water, when the temperature of the contact area detected by the temperature detecting means reaches the ambient temperature, the supply of the cooling water by the cooling water supply means is switched to the maximum supply amount. The surface temperature can be suppressed to a temperature lower than the upper limit temperature at which overheating occurs. The switching timing to the maximum supply amount is as follows:
Since the temperature of the non-contact area detected by the temperature detection means has reached a predetermined temperature equal to or higher than the dew point, dew condensation in the non-contact area can be prevented even immediately after switching to the maximum supply amount. As described above, appropriate temperature control of the cooling roll can be performed simply by switching the supply amount of the cooling water to the maximum supply amount and half of the maximum supply amount. Can be achieved.

According to the cooling roll temperature control method of the third aspect and the cooling roll temperature control device of the eighth aspect, after the start of the supply of the cooling water, the maximum supply of the cooling water by the cooling water supply means is performed. By supplying the cooling water at a supply amount of half of the amount, it is possible to prevent an extreme decrease in the surface temperature and to surely prevent dew condensation in a non-contact area of the cooling roll with the object to be cooled. Further, after the supply of the cooling water is started, when the supply amount of the object to be cooled per unit time is in a steady state, or after a lapse of a predetermined time from the start of the supply, the supply of the cooling water by the cooling water supply unit is performed. Since the switching is made to the maximum supply amount, the surface temperature can be suppressed to a temperature lower than the upper limit temperature at which overheating occurs. The switching timing to the maximum supply amount is performed when the supply amount of the object to be cooled per unit time is in a steady state or after a predetermined time has elapsed from the start of the supply. And dew condensation in the non-contact area can be prevented even immediately after switching to the maximum supply amount. As described above, appropriate temperature control of the cooling roll can be performed simply by switching the supply amount of the cooling water to the maximum supply amount and half of the maximum supply amount. Can be achieved.

According to the cooling roll temperature control method described in claim 4, the cooling roll temperature control device described in claim 9, and the cooling roll temperature control system described in claim 13, The cooling water is supplied to the straight pipe at a supply amount that is half the maximum supply amount or the maximum supply amount. The amount of supply can be switched.

According to the cooling roll temperature control method according to the fifth aspect, the cooling roll temperature control device according to the tenth aspect, and the cooling roll temperature control system according to the fourteenth aspect, the straight pipe is provided with By setting one of the two supply paths to a fully open state and the other to a fully closed state, supply is performed at a supply amount that is half of the maximum supply amount. Is fully opened, the supply at the maximum supply amount is performed, so that the supply amount can be reliably switched by simple control.

[Brief description of the drawings]

FIG. 1 is a side view showing a schematic configuration of an extrusion laminating machine according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a schematic configuration of a cooling roll used in the laminating machine of FIG.

3A and 3B are side views showing a state in which a rotary joint is connected to the cooling roll of FIG. 2; FIG. 3A is a case where a hollow rotary joint according to the first embodiment is provided; (C) is a view showing a case where the rotary joint is generally used.

4 is a cross-sectional side view of a part of the rotary joint according to the embodiment of the present invention shown in FIG.

FIG. 5 is a block diagram showing an electrical connection relationship of a rotary joint according to an embodiment of the present invention.

6A and 6B are views showing a split type ferrite core according to an embodiment of the present invention, wherein FIG. 6A is a perspective view showing the split type ferrite core, and FIG. 6B is a view showing the split type ferrite core of FIG. FIG. 5C is a side view as seen from the 50a side, and FIG.
It is a side view which shows the state which mounted | wore 1.

FIG. 7 is a plan view showing a configuration of a rotating-side ferrite core coil unit according to an embodiment of the present invention.

8A is a diagram illustrating an example of a coil configuration in a transformer using electromagnetic induction as a comparative example, and FIG.
FIG. 4 is a diagram showing a current waveform in the coil configuration of FIG.

9A is a diagram illustrating an example of a coil configuration of a power transmission coupler according to an embodiment of the present invention, and FIG. 9B is a diagram illustrating a current waveform in the coil configuration of FIG. 9A.

FIG. 10 is a diagram illustrating a schematic configuration of a temperature control system according to an embodiment of the present invention.

11A and 11B are diagrams for explaining a temperature control method according to an embodiment of the present invention, and FIG. 11A is a diagram illustrating a contact area and a non-contact area with a resin of a cooling roll, and an arrangement position of a temperature measuring resistor. , (B) is a diagram showing the distribution of the surface temperature of the cooling roll, (C) is a diagram showing the distribution of the surface temperature of the cooling roll by the temperature control of the present embodiment, (D) is a diagram of the cooling roll when condensation occurs. FIG. 4E is a diagram showing a distribution of surface temperature, and FIG. 4E is a diagram showing a distribution of surface temperature of a cooling roll when winding of resin occurs.

12 (A) and 12 (i) are temperature distributions when the heat load on the heat pipe type cooling roll of the present invention is small,
(A) and (ii) are temperature distributions when the heat load on the heat pipe type cooling roll of the present invention is large, and (A) (i)
ii) is a diagram showing a temperature distribution when the heat load on the conventional spiral cooling roll is small, and (A) and (iv) are diagrams showing a temperature distribution when the heat load on the conventional spiral cooling roll is large, respectively. (B) shows the relationship between the amount of cooling water and the finishing temperature when the heat load is different, and (C) shows the relationship between the line speed and the finishing temperature indicating that the line speed has been improved by the present invention. FIG.

FIG. 13 (A) shows a case where the valve is opened halfway and fully opened.
The figure which shows the temperature change with respect to the amount of resin of the resin contact area | region and the non-contact area | region in the heat pipe type cooling roll of this invention, (B) The timing chart which makes a valve half open and a full open (the 1), (C) FIG. 7 is a timing chart (part 2) for opening a valve halfway and fully opening, (D) is a diagram showing a case of a single valve, and (E) is a diagram showing a case of two valves.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rotary joint 2 ... Hollow shaft 11, 11 '... Side temperature resistor 23 ... T die 25 ... Heat pipe type cooling roll 30 ... Pipe 43 ... Control means (cooling automatic control panel) 44 ... Dew point meter 45 ... Chiller 46 ... Automatic valve

Continued on the front page F-term (reference) 2F073 AA35 AB04 BB01 BC02 CC02 CD04 DD01 EE12 FF01 FF03 FG14 GG01 GG04 4F207 AA04 AD05 AD08 AG01 AG03 AH54 AJ02 AK02 AP05 AR06 AR09 AR14 KA01 KA17 KB13 KK54 KK64 KM84

Claims (14)

[Claims] 1. A method of controlling the temperature of a cooling roll in which cooling water is supplied to the inside and an object to be cooled is gradually supplied to the surface with the start of a cooling process, wherein the cooling roll has a tubular shape. A cooling roll including a roll body, a plurality of straight pipes provided inside the roll body and serving as a flow path of cooling water, and a refrigerant layer formed between the straight pipe and the roll body is used. Starting the supply of the cooling water to the straight pipe by the cooling water supply means with a supply amount of a half of the maximum supply amount of the cooling water by the cooling water supply means; and A step of detecting the temperature of the contact area by temperature detecting means provided in a contact area; a step of detecting an ambient temperature; and a temperature of the contact area detected by the temperature detecting means after the start of supply of the cooling water. Reaches the ambient temperature Switching the supply of the cooling water to the straight pipe by the cooling water supply means to a maximum supply amount of the cooling water by the cooling water supply means. Method. 2. A method for controlling the temperature of a cooling roll in which cooling water is supplied to the inside and an object to be cooled is gradually supplied to the surface with the start of a cooling process, wherein the cooling roll has a tubular shape. A cooling roll including a roll body, a plurality of straight pipes provided inside the roll body and serving as a flow path of cooling water, and a refrigerant layer formed between the straight pipe and the roll body is used. Starting the supply of the cooling water to the straight pipe by the cooling water supply means with a supply amount of a half of the maximum supply amount of the cooling water by the cooling water supply means; and A step of detecting a temperature of the non-contact area by a temperature detection unit provided in a non-contact area other than the contact area; a step of detecting a dew point based on an ambient temperature and a humidity; Detected by the temperature detecting means. When the temperature of the non-contact area reaches a predetermined temperature equal to or higher than the dew point, the supply of the cooling water to the straight pipe by the cooling water supply unit is switched to the maximum supply amount of the cooling water by the cooling water supply unit. A method for controlling the temperature of a cooling roll, comprising: 3. A method for controlling the temperature of a cooling roll in which cooling water is supplied to the inside and an object to be cooled is gradually supplied to the surface with the start of a cooling process, wherein the cooling roll has a tubular shape. A cooling roll including a roll body, a plurality of straight pipes provided inside the roll body and serving as a flow path of cooling water, and a refrigerant layer formed between the straight pipe and the roll body is used. Starting the supply of the cooling water to the straight pipe by the cooling water supply means at a supply amount of a half of the maximum supply amount of the cooling water by the cooling water supply means; When the supply amount of the object to be cooled per unit time is in a steady state, the supply of the cooling water to the straight pipe by the cooling water supply unit is switched to the maximum supply amount of the cooling water by the cooling water supply unit. Characterized by having a process and Cooling roll temperature control method. 4. The step of supplying the cooling water to the straight pipe at a supply rate that is half the maximum supply rate or the maximum supply rate includes a step of supplying a single supply path to the straight pipe. The method according to any one of claims 1 to 3, wherein the step is performed by a cooling water supply unit provided. 5. The step of supplying the cooling water to the straight pipe at a supply rate that is half of the maximum supply rate or the maximum supply rate, wherein the supply path is divided into two sections for the straight pipe. The step of performing supply with a supply amount of half of the maximum supply amount is a step of setting one supply path to a fully open state and setting the other supply path to a fully closed state. There is a step of supplying at the maximum supply amount,
4. The method of controlling a temperature of a cooling roll according to claim 1, wherein the step is a step of fully opening both supply paths. 6. A temperature control device for a cooling roll in which cooling water is supplied to the inside and an object to be cooled is gradually supplied to the surface with the start of the cooling process, wherein the cooling roll has a tubular shape. A cooling roll including a roll, a plurality of straight pipes provided inside the roll and serving as a flow path of cooling water, and a refrigerant layer formed between the straight pipe and the roll is used. A cooling water supply unit for supplying cooling water to the straight pipe; a cooling water supply amount adjusting unit for adjusting a supply amount of the cooling water by the cooling water supply unit; and a cooling object of the roll body. Temperature detection means provided in the contact area; atmosphere temperature detection means for detecting an ambient temperature; and at the start of the cooling process, the supply amount by the cooling water supply amount adjusting means, and the cooling water by the cooling water supply means. Half of maximum supply When the temperature of the contact area detected by the temperature detection unit reaches the ambient temperature after the start of the supply of the cooling water, the supply amount is adjusted by the cooling water supply amount adjusting unit. Control means for switching to the maximum supply amount, a temperature control device for a cooling roll. 7. A temperature control device for a cooling roll in which cooling water is supplied to the inside and an object to be cooled is gradually supplied to the surface with the start of a cooling process, wherein the cooling roll has a tubular shape. A cooling roll including a roll, a plurality of straight pipes provided inside the roll and serving as a flow path of cooling water, and a refrigerant layer formed between the straight pipe and the roll is used. A cooling water supply unit for supplying cooling water to the straight pipe; a cooling water supply amount adjusting unit for adjusting a supply amount of the cooling water by the cooling water supply unit; and a cooling object of the roll body. Temperature detecting means provided in a non-contact area other than the contact area; dew point detecting means for detecting a dew point based on ambient temperature and humidity; and at the start of cooling processing, the cooling water supply amount adjusting means adjusts the supply amount. , The cooling water supply When the supply amount of the cooling water is half of the maximum supply amount by the means, and after the start of the supply of the cooling water, the temperature of the non-contact area detected by the temperature detecting means reaches a predetermined temperature equal to or higher than the dew point.
A control unit for switching the supply amount to the maximum supply amount by the cooling water supply amount adjustment unit; and a cooling roll temperature control device. 8. A temperature control device for a cooling roll in which cooling water is supplied to the inside and an object to be cooled is gradually supplied to the surface with the start of the cooling process, wherein the cooling roll has a tubular shape. A cooling roll including a roll, a plurality of straight pipes provided inside the roll and serving as a flow path of cooling water, and a refrigerant layer formed between the straight pipe and the roll is used. A cooling water supply unit for supplying cooling water to the straight pipe pipe; a cooling water supply amount adjusting unit for adjusting a supply amount of the cooling water by the cooling water supply unit; and a time elapsed from the start of the cooling process. Time measuring means for measuring, and at the start of the cooling process, the cooling water supply amount adjusting means sets the supply amount to half of the maximum supply amount of the cooling water by the cooling water supply unit, and the time measuring means Measured by And a control means for switching the supply amount to the maximum supply amount by the cooling water supply amount adjusting means when a predetermined time has elapsed from the start of the supply of the cooling water. Roll temperature control device. 9. The cooling water supply amount adjusting means for adjusting the supply amount of the straight pipe pipe in a single supply path. Cooling roll temperature control device. 10. The cooling water supply amount adjusting means sets one of the two divided supply paths to the straight pipe in a fully open state and the other supply path in a fully closed state. Means for adjusting the supply amount to be a half of the maximum supply amount, and adjusting the supply amount to be the maximum supply amount by fully opening both supply paths. The cooling roll temperature control device according to any one of claims 6 to 8, wherein: 11. A cooling roll temperature control system in which cooling water is supplied to the inside and an object to be cooled is gradually supplied to the surface with the start of a cooling process, wherein the cooling roll has a tubular shape. A roll, a plurality of straight pipes provided inside the roll and serving as a flow path of cooling water, and a cooling roll including a refrigerant layer formed between the straight pipe and the roll. A rotation drive unit for the roll body, a temperature detection unit provided in a contact area of the roll body with the object to be cooled, a rotation unit attached to a shaft portion of the roll body, and a rotation unit. A signal transmission device for transmitting an output signal from the temperature detecting means from the rotating unit to the stationary unit, comprising: a stationary unit attached to the stationary side in a non-contact state; Cold A cooling water supply unit for supplying water; a cooling water supply amount adjusting unit for adjusting a supply amount of the cooling water by the cooling water supply unit; an ambient temperature detecting unit for detecting an ambient temperature; The cooling water supply amount adjusting unit sets the supply amount to a half of the maximum supply amount of the cooling water by the cooling water supply unit, and detects the supply amount of the cooling water by the temperature detection unit after the start of the supply of the cooling water. Control means for switching the supply amount to the maximum supply amount by the cooling water supply amount adjusting means when the temperature of the contact region reaches the ambient temperature, a cooling roll temperature control system comprising: . 12. A cooling roll temperature control system in which cooling water is supplied to the inside and an object to be cooled is gradually supplied to the surface with the start of a cooling process, wherein the cooling roll has a tubular shape. Roll body, a plurality of straight pipes provided inside the roll body and serving as a flow path of cooling water, a cooling roll including a refrigerant layer formed between the straight pipe and the roll body, Rotation drive means for the roll body, temperature detection means provided in a non-contact area other than the contact area of the roll body with the object to be cooled, a rotation unit attached to a shaft of the roll body, A signal transmission device that includes a stationary unit attached to the stationary side in a non-contact state with respect to the rotating unit, and transmits an output signal from the temperature detection unit from the rotating unit to the stationary unit. , Previous A cooling water supply unit for supplying cooling water to the straight pipe; a cooling water supply amount adjusting unit for adjusting a supply amount of the cooling water by the cooling water supply unit; and a dew point for detecting a dew point based on an ambient temperature and humidity. At the start of the cooling process, at the start of the cooling process, the supply amount of the cooling water is set to half of the maximum supply amount of the cooling water by the cooling water supply unit, and the supply of the cooling water is started. Thereafter, when the temperature of the non-contact area detected by the temperature detecting means reaches a predetermined temperature equal to or higher than the dew point,
Control means for switching the supply amount to the maximum supply amount by the cooling water supply amount adjustment means, and a cooling roll temperature control system. 13. The cooling roll according to claim 11, wherein said cooling water supply amount adjusting means is means for adjusting a supply amount of said straight pipe pipe in a single supply path. Temperature control system. 14. The cooling water supply amount adjusting means sets one of the two divided supply paths to the straight pipe to a fully open state and the other supply path to a fully closed state. Means for adjusting the supply amount to be a half of the maximum supply amount, and adjusting the supply amount to be the maximum supply amount by fully opening both supply paths. The cooling roll temperature control system according to claim 11 or 12, wherein: