JPS6262431B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-temperature roller for yarn, and more particularly to a high-temperature roller heated by electromagnetic induction that is used at a high temperature of 300° C. or higher and is suitable for processing heat-resistant fibers.

Conventional rollers heated by electromagnetic induction are known as induction heating rollers. This type of roller has a magnetic flux generating mechanism consisting of a core and a coil arranged coaxially with the roller axis inside a hollow roller body that is connected to a rotating shaft and rotated, and this coil is energized by an AC power source. The idea is to induce a current in the roller shell based on the alternating magnetic flux generated by this, and to generate heat in the roller shell by this induced current. Therefore, it can be constructed compactly and is often used for heat treatment of yarn.
The operating temperature was generally 300°C or lower.

By the way, heat-resistant fibers that have been newly developed in recent years require a heat treatment temperature of 300°C or higher, and in some cases, a high temperature of 400°C or higher. When conventional induction heating rollers are used at such high temperatures, the temperature distribution in the axial direction of the rollers is very poor, and in order to secure the effective length necessary for heat treatment, a very large roller is required. There was a problem that the advantages of the heat generating roller could not be taken advantage of.

The present invention was made in view of the current situation, and
The present invention provides a high temperature roller whose temperature distribution can be easily detected and whose temperature distribution can be arbitrarily set.

That is, the present invention provides a high-temperature roller in which a magnetic flux generation mechanism is interposed between the roller body and its rotating shaft to heat the roller body by induction.
While covering the outer peripheral surface of the magnetic flux generation mechanism with a heat insulating layer, the temperature sensing end is placed within the heat insulating layer or between the heat insulating layer and the magnetic flux generating mechanism so that the temperature sensing part is located in the space between the roller body and the heat insulating layer. This high-temperature roller is characterized in that the temperature of the roller body is detected by blackening the inner circumferential surface of the roller body and the temperature sensing portion at the temperature detection end.

The present invention described above is based on the discovery that, for high-temperature rollers, the radiant temperature detection method that detects radiant heat from the roller body can fairly effectively detect the roller body temperature both dynamically and statically. In particular, the radiation temperature detection described above has excellent dynamic followability.

Hereinafter, the details of the present invention will be explained with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In the figure, reference numeral 1 denotes a roller that heat-treats the yarn wound around it while transferring it, and is attached to the tip of a rotating shaft 2 via a boss 1a with a screw 3 so that it can be driven at a predetermined rotational speed. There is. and,
A magnetic flux generating mechanism 4 is disposed coaxially with the rotating shaft 2 between the main body 1b of the roller 1 and the rotating shaft 2 so as to pass an axial magnetic flux through the main body 1b. Note that the holder 5 that supports the magnetic flux generation mechanism 4 is fixed to a machine frame (not shown) via a flange portion 5a. The above basic configuration is the same as the conventional induction heating roller, so by detecting the temperature of the roller body 1b and adjusting the magnetic flux from the magnetic flux generation mechanism 4,
The temperature of the roller body 1b is controlled to a temperature suitable for heat treatment of a predetermined yarn.

By the way, unlike conventional rollers, temperature detection and related configurations are as follows.

FIG. 1 shows an embodiment in which the magnetic flux generating mechanism 4 is divided into three sections in the roller axial direction.
1 is a temperature detection end for detecting the temperature of the roller body 1b, and its temperature sensing portions 6a, 7a, 8a are blackened by coating with black heat-resistant paint or the like.
Similarly, the inner peripheral surface of the roller body 1b facing the temperature detection end is blackened in strips each having a width of 5 to 30 mm.
The temperature detection ends 6, 7, and 8 are designed to detect the roller temperature by radiant heat transfer. The temperature detection ends 6, 7, 8 are temperature sensing parts 6a, 7a, 8, respectively.
It is provided through a heat insulating layer 41 of a magnetic flux generation mechanism 4, which will be described later, so that a is located approximately at the center of the roller 1, close to the inner peripheral surface of the tip, center, and open end. Lead parts 6b, 7 of temperature detection ends 6, 7, 8
b, 8b are fixed to the flange portion 5a of the holder 5, led out to the outside, and connected to the temperature control devices T1, T.
2 and T3, respectively.

On the other hand, the magnetic flux generating mechanism 4 is divided into three sections as shown below so that the tip, center, and open end of the roller body 1b can be controlled independently. That is, core 4
2 is a cylindrical core 42a having a predetermined length corresponding to the roller length.
The collar cores 42b, 42c,
42d, 42e are provided, and independent coils 43a, 43b, 43c are provided in each section partitioned by collar cores 42c, 42d. In addition, the tsuba cores 42b, 42c, 42d, 4
The outer diameter of roller 2e is such that it has a small gap with the inner circumferential surface of roller body 1b, and both opposing surfaces are coated with a heat-resistant silver coating to suppress radiant heat transfer. Therefore, the coils 43a, 43b, 43c
The lines of magnetic force due to each tsuba core 42b, 42c, 42
d and 42e, the coils 43a, 43b, and 43c control the temperatures of the tip, center, and open ends of the corresponding roller bodies 1b, respectively. can. By the way, each coil 43a, 43b, 43c
A heat insulating layer 41 is provided around the roller body 1b to block heat from the roller body 1b and prevent the temperature of the coil from rising.

Note that the coils 43a, 43b, and 43c are connected to temperature control devices T1 and T1 of the corresponding parts, respectively, as shown in the figure.
The coils are connected to T2 and T3 so that the current of each coil can be controlled independently.

With the above configuration, the temperature of the roller body 1b is controlled as follows. In addition, each temperature control device T
1, T2, and T3 are set at temperature settings suitable for the heat treatment of the treated yarn.

Temperatures at the tip, center, and open end of the roller body 1b are detected by temperature detection ends 6, 7, and 8, respectively. At this time, since the temperature detection ends 6, 7, 8 are inserted into the space between the magnetic flux generation mechanism 4 and the roller body 1b, it is easy to install a large number of temperature detection ends 6, 7, 8. Moreover, it is inexpensive. In addition, since the structure passes through the heat insulating layer 41 or between the heat insulating layer and the magnetic flux generation mechanism, there is no problem of damage to the temperature detection ends 6, 7, 8 or measurement errors due to heating of the temperature detection ends, and the stability is stable. Temperature detection is possible.

The temperatures detected by the temperature detection terminals 6, 7, and 8 are transmitted to temperature control devices T1, T2, and T3, respectively, and compared with set values. Control signals from temperature control devices T1, T2, and T3 are applied to each coil 43a, 43b, and 43c, respectively. Therefore, as described above, the tip, center, and open end of the roller body 1b are connected to the coils 43a and 43, respectively.
b, 43c, the temperature control devices T1, T2, T
The temperature is controlled to 3. in this way,
Since the tip and open end, which have a large heat load, are controlled independently from the center part, which has a small heat load, a very uniform temperature distribution can be achieved by setting the same temperature on the temperature control devices T1, T2, and T3. . This effect is particularly great for high-temperature rollers used at temperatures above 300°C, where the temperature drop at both ends is significant and it is difficult to secure an effective length.

As mentioned above, temperature detection is performed on the roller body 1.
Temperature sensing parts 6a, 7a, on the inner peripheral surface of b and the temperature detection end
8a is blackened and detected by radiant heat, the dynamic response is excellent and the control accuracy of the control is improved, and a simple configuration of the control device is sufficient.

As described above, the present invention provides a temperature sensing section in which the surface of the inner peripheral surface of the roller body facing the temperature detection end is blackened in a band shape, and the temperature sensing portion near the inner peripheral surface is blackened. It can be implemented in various ways based on radiant heat detection of the temperature of the roller body by arranging the Not only can the axial temperature distribution of the roller be made uniform, but also a desired axial temperature pattern can be realized, and it can be applied to many fields. As described above, the present invention greatly contributes to temperature control of the heating roller.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the present invention. 1 is a roller, 2 is a rotating shaft, 4 is a magnetic flux generation mechanism,
6, 7, and 8 are temperature detection terminals, and T1, T2, and T3 are temperature control devices.

Claims (1)

[Scope of Claims] 1. A high-temperature roller in which a magnetic flux generating mechanism is interposed between the roller body and its rotating shaft to heat the roller body by induction, the outer peripheral surface of the magnetic flux generating mechanism being covered with a heat insulating layer. On the other hand, a temperature sensing end is provided within the heat insulating layer or between the heat insulating layer and the magnetic flux generating mechanism so that the temperature sensing part is located in the space between the roller body and the heat insulating layer, and the temperature is detected on the inner circumferential surface of the roller body. A high-temperature roller characterized in that a temperature-sensitive portion at a detection end is blackened to detect the temperature of the roller body. 2. The magnetic flux generating mechanism is divided into a plurality of sections in the axial direction of the roller, and the temperature detection end is provided for each divided section, so that the temperature of each section is independently controlled. The high temperature roller described in item 1. 3. The high temperature roller according to claim 2, which is divided into three sections in the axial direction of the roller.