JP7296111B2 - Heat Roller Device, Method for Manufacturing Heat Roller Device, and Method for Adjusting Cooling Capacity of Heat Roller Device - Google Patents

Description

The present invention relates to a heat roller device, a method for manufacturing a heat roller device, and a method for adjusting the cooling capacity of the heat roller device.

As a conventional induction heating roller device, as shown in Patent Document 1, a cooling channel is formed in the side peripheral wall of a roller body that is induction-heated to allow a cooling medium to flow therethrough, thereby cooling the roller body with the cooling medium. Therefore, it has been proposed to adjust the surface temperature of the roller body to a desired temperature.

However, when the roller body is heated to a temperature of, for example, 100 to 200° C. or more, if a cooling medium of, for example, 25° C. is passed through, the roller body is cooled too much, and the temperature is adjusted to the desired value. can be difficult to do.

JP 2009-283159 A

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above problems, and its main object is to make it possible to easily adjust the cooling capacity (cooling capacity) of a heat roller device.

That is, a heat roller device according to the present invention comprises a roller body supported rotatably, a cooling mechanism for causing a cooling medium to flow through an internal flow path formed in the roller body, and the internal flow path. and a heat insulating member provided on the inner surface.

According to such a heat roller device, since the heat insulating member is provided on the inner surface forming the internal flow path, the heat transfer rate from the cooling medium to the roller body can be reduced. This solves the problem that the temperature of the roller body and the temperature of the object processed by the heat roller device are excessively lowered by the cooling medium. As a result, the temperature of the roller body and the temperature of the object to be processed by the heat roller device can be easily adjusted to the desired temperature.

As a specific mode of installing the heat insulating member, it is desirable that the heat insulating member is provided on the entire inner surface of the internal flow path in the circumferential direction.
With this configuration, there is no part of the inner surface of the internal flow path that is excessively cooled, and the temperature can be easily adjusted.
In addition, in order to easily adjust the surface temperature of the roller body to a desired temperature, it is conceivable to provide a heat insulating member on the radially outer portion of the inner surface of the internal flow path.

The heat insulating member is preferably made of resin.
With this configuration, the heat insulating member can be easily provided in the internal flow path of the roller body, and the heat insulating member can be prepared at low cost.

In order to facilitate the provision of the heat insulating member in the internal flow path of the roller body, it is desirable that the heat insulating member has a tubular shape. In this case, it suffices to insert a tubular heat insulating member into the internal flow path.

In order to make the surface temperature of the roller body uniform in the axial direction, it is desirable that the side peripheral wall of the roller body is formed with a jacket chamber in which a gas-liquid two-phase heat medium is enclosed.

Further, a method for manufacturing a heat roller device according to the present invention is a heat roller device comprising a roller body rotatably supported and a cooling mechanism for causing a cooling medium to flow through an internal flow path formed in the roller body. The manufacturing method of , characterized in that a heat insulating member is provided on the inner surface forming the internal flow path.

Further, a method for adjusting the cooling capacity of a heat roller device according to the present invention includes a roller body that is rotatably supported, and a cooling mechanism that causes a cooling medium to flow through an internal flow path formed in the roller body. A method for adjusting the cooling capacity of a heat roller device is characterized in that a heat insulating member is provided on the inner surface forming the internal flow path.

According to the present invention configured as described above, the cooling capacity (cooling capacity) of the heat roller device can be easily adjusted.

1 is a cross-sectional view schematically showing the configuration of an induction heating roller device according to a first embodiment; FIG. It is a partially enlarged cross-sectional view along the axial direction of the roller body according to the same embodiment. It is a partially enlarged cross-sectional view orthogonal to the axial direction of the roller body according to the same embodiment. It is a partially enlarged cross-sectional view orthogonal to the axial direction of a roller body according to a modified embodiment. It is a partially enlarged cross-sectional view orthogonal to the axial direction of a roller body according to a modified embodiment.

An embodiment of a heat roller device according to the present invention will be described below with reference to the drawings.

<1. Device configuration>
The heat roller device 100 according to the present embodiment is a sheet or web material such as plastic film, paper, cloth, non-woven fabric, synthetic fiber, or metal foil, or a continuous material (object to be processed) such as wire (thread) material. It is used in a heat treatment process or the like.

Specifically, as shown in FIG. 1, the heat roller device 100 includes a roller body 2 that is rotatably supported, and an induction heating mechanism 3 that is provided inside the roller body 2 and causes the roller body 2 to generate heat by induction. , the roller body 2 is supported from both sides in the axial direction.

The roller main body 2 includes a cylindrical roll shell portion 2a, journal portions 2b provided at both ends of the roll shell portion 2a in the axial direction and closing openings at both ends of the roll shell portion 2a, and a roll from the journal portion 2b. and a hollow drive shaft portion 2c extending on the rotation center axis of the roll shell portion 2a outside the shell portion 2a. The drive shaft portion 2c is rotatably supported by a machine base 5 via a bearing 4 such as a rolling bearing. The roller body 2 is configured to be rotated by a driving force externally applied by a rotation driving mechanism (not shown) such as a motor. The roller body 2 is provided with a temperature sensor (not shown) for detecting the temperature of the roll shell portion 2a.

The induction heating mechanism 3 includes, for example, a cylindrical iron core 31 and an induction coil 32 wound around the outer peripheral surface of the iron core 31 . A support shaft 6 is attached to each end of the core 31 . The support shafts 6 are inserted through the drive shaft portion 2c, respectively, and are rotatably supported with respect to the drive shaft portion 2c via bearings 7 such as rolling bearings. As a result, the induction heating mechanism 3 is held stationary with respect to the roller body 2 inside the rotating roller body 2 . A lead wire L1 is connected to the induction coil 32, and an AC power supply V for applying an AC voltage is connected to the lead wire L1.

When an AC voltage is applied to the induction coil 32, the induction heating mechanism 3 generates an alternating magnetic flux, which passes through the roll shell portion 2a, which is the side peripheral wall of the roller body 2. As shown in FIG. Due to this passage, an induced current is generated in the roll shell portion 2a, and the induced current causes Joule heat in the roll shell portion 2a. At this time, the temperature of the roll shell portion 2a is feedback-controlled based on the temperature detected by the temperature sensor.

Thus, in the induction heating roller device 100 of the present embodiment, the roll shell portion 2a of the roller body 2 is formed with a jacket chamber 21 in which a gas-liquid two-phase heat medium is enclosed. The heat medium of the present embodiment is, for example, water such as pure water, but is not limited to this.

A plurality of jacket chambers 21 are formed in the roll shell portion 2a of the roller body 2 along the axial direction. A plurality of jacket chambers 21 are provided, for example, at regular intervals in the circumferential direction of the roll shell portion 2a. Also, the plurality of jacket chambers 21 are configured to communicate with each other through a communicating passage 22 at at least one axial end. Thereby, the heat medium can flow from one jacket chamber 21 to another jacket chamber 21 . Note that the plurality of jacket chambers 21 may not be configured to communicate with each other, and may be independent one by one.

In addition, the induction heating roller device 100 of the present embodiment has a cooling mechanism 8 for cooling the roller body 2 by causing a cooling medium to flow through an internal flow path 81 (cooling flow path 81) formed in the roller body 2. is further provided.

Here, the cooling channel 81 is formed in the linear channel portion 81a formed in the roll shell portion 2a of the roller body 2, and in the journal portion 2b and the drive shaft portion 2c on one side, and the cooling channel portion 81a is formed in the linear channel portion 81a. It has an introduction channel portion 81b that introduces the medium, and an outlet channel portion 81c that is formed in the other journal portion 2b and drive shaft portion 2c and leads out the cooling medium that has passed through the straight channel portion 81a. The cooling channel 81 is connected to a cooling medium circulation mechanism (not shown) provided outside the roller body 2 and having, for example, a circulation pump and a cooler.

Here, the straight flow path portion 81 a of the cooling flow path 81 is formed radially inward of the jacket chamber 21 in the roll shell portion 2 a of the roller body 2 . Further, a plurality of straight flow passage portions 81a are formed in the roll shell portion 2a of the roller body 2 along the axial direction. The plurality of straight flow passage portions 81a are provided, for example, at equal intervals in the circumferential direction of the roll shell portion 2a. One end in the axial direction of the plurality of straight flow passage portions 81a is connected to the introduction flow passage portion 81b, and the other end in the axial direction of the plurality of straight flow passage portions 81a is connected to the outlet flow passage portion 81c. ing.

In this embodiment, the heat insulating member 9 is provided on the inner surface of the roller body 2 that forms the cooling flow path 81 . Specifically, the heat insulating member 9 is provided on the inner surface forming the straight channel portion 81 a of the cooling channel 81 .

The heat insulating member 9 reduces the heat transfer coefficient from the cooling medium to the roller main body 2, and is made of a fluororesin such as Teflon in this embodiment.

Moreover, the heat insulating member 9 is provided on the entire inner surface of the linear flow path portion 81a in the circumferential direction. The heat insulating member 9 of this embodiment has a tubular shape. Here, the tubular heat insulating member 9 has an outer diameter that fits within the inner diameter of the straight flow path portion 81a. In the manufacturing stage, the tubular heat insulating member 9 is inserted into the straight flow passage portion 81a to provide the heat insulating member 9 in the straight flow passage portion 81a. It is conceivable to form a slit along the axial direction in the shaped heat insulating member 9 . This facilitates the deformation of the heat insulating member 9 during the insertion work, thereby facilitating the insertion work.

Furthermore, the cooling performance (cooling capacity) of the roller body 2 can be adjusted by selecting the material of the heat insulating member 9 and adjusting the thickness of the heat insulating member 9 in the manufacturing stage. For example, in the case of a tubular heat insulating member 9, it is conceivable to adjust the thickness of the heat insulating member 9 by forming a multi-layered structure by doubling or tripling the heat insulating members 9 having different pipe diameters.

<2. Effect of the present embodiment>
According to the heat roller device 100 configured as described above, since the heat insulating member 9 is provided on the inner surface forming the cooling passage 81, the heat transfer rate from the cooling medium to the roll shell portion 2a of the roller body 2 is reduced. can be made This solves the problem that the temperature of the roll shell portion 2a of the roller body 2 and the temperature of the object to be processed by the heat roller device 100 are excessively lowered by the cooling medium. As a result, the temperature of the roll shell portion 2a of the roller body 2 and the temperature of the object to be processed by the heat roller device 100 can be easily adjusted to desired temperatures.

<3. Modified Embodiment of the Present Invention>
It should be noted that the present invention is not limited to the above embodiments.

For example, although the roller main body 2 of the above-described embodiment has the jacket chamber 21 formed therein, the jacket chamber 21 may not be formed therein.

Further, although the heat insulating member 9 of the above-described embodiment is made of fluorine resin such as Teflon, it may be made of other resin, and the heat transfer coefficient from the cooling medium to the roller body 2 may be reduced. A material other than resin may be used as long as it reduces the resistance.

Furthermore, the heat insulating member 9 of the above-described embodiment is provided on the entire inner surface of the straight flow channel portion 81a of the cooling flow channel 81 in the circumferential direction. can be In this case, as shown in FIG. 4, it is conceivable to provide a heat insulating member 9 on the radially outer portion of the inner surface of the straight flow path portion 81a. In addition, the heat insulating member 9 may be provided in a part of the inner surface of the straight flow passage portion 81a in the axial direction.

In addition, the heat insulating member 9 may also be provided in the inlet channel portion 81b and the outlet channel portion 81c formed in the journal portion 2b.

In the above-described embodiment, in the roll shell portion 2a of the roller main body 2, the straight flow passage portion 81a of the cooling flow passage 81 is formed radially inside the jacket chamber 21. However, as shown in FIG. , may be formed concentrically with the jacket chamber 21, or may be formed inside the jacket chamber 21 so as to pass through the jacket chamber 21 as shown in FIG. As shown in C), it may be formed radially outside the jacket chamber 21 .

The heat roller device 100 of the above-described embodiment is an induction heating roller device, but it may be applied to a circulation roller device that causes a heating fluid to flow inside the roller body, or has a heating function. It may be applied to a heat roller device that does not have a heat roller.

Moreover, although the heat roller device 100 of the above-described embodiment was a double-supported heat roller device, it is a cantilevered heat roller device that supports the roller body 2 from one end in the axial direction of the roller body 2. Also good.

In addition, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications are possible without departing from the spirit of the present invention.

REFERENCE SIGNS LIST 100: induction heating roller device 2: roller main body 21: jacket chamber 8: cooling mechanism 81: internal channel (cooling channel)
9 ... heat insulation member

Claims (9)

a roller body rotatably supported;
a cooling mechanism that causes a cooling medium to flow through a cooling channel formed in the roller body,
The roller body has a cylindrical roll shell,
The cooling channel is formed between an inner peripheral surface and an outer peripheral surface of the roll shell portion,
A heat roller device , wherein a heat insulating member is provided on an inner surface forming the cooling channel . 2. The heat roller device according to claim 1, wherein said cooling channel has a linear channel portion formed along the axial direction of said roll shell portion. 3. The heat roller device according to claim 2, wherein a plurality of said linear passage portions are formed in said roll shell portion in the circumferential direction. 4. The heat roller device according to claim 1, wherein the heat insulating member is provided along the entire inner surface of the cooling channel in the circumferential direction. 5. The heat roller device according to claim 1, wherein said heat insulating member is made of resin. 6. The heat roller device according to claim 1 , wherein said heat insulating member has a tubular shape. 7. The heat roller device according to claim 1 , wherein said roll shell portion is provided with a jacket chamber in which a gas-liquid two-phase heat medium is enclosed. A method for manufacturing a heat roller device comprising a roller body rotatably supported and a cooling mechanism for causing a cooling medium to flow through a cooling channel formed in the roller body, the method comprising:
forming the cooling passage between the inner peripheral surface and the outer peripheral surface of the cylindrical roll shell portion of the roller body;
A method of manufacturing a heat roller device, wherein a heat insulating member is provided on an inner surface forming the cooling channel . A method for adjusting the cooling capacity of a heat roller device comprising a roller body rotatably supported and a cooling mechanism for causing a cooling medium to flow through a cooling channel formed in the roller body, the method comprising:
forming the cooling passage between the inner peripheral surface and the outer peripheral surface of the cylindrical roll shell portion of the roller body;
A method for adjusting the cooling capacity of a heat roller device, wherein a heat insulating member is provided on the inner surface forming the cooling passage .

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