JP3753874B2 - Induction heating roller device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an induction heating roller device used for heating and stretching, for example, resin yarns.
[0002]
[Prior art]
An induction heating roller device may be used to heat and stretch the yarns. FIG. 4 shows an example of the schematic configuration, in which a pair of induction heat generation rollers A and B are arranged side by side, and the peripheral wall of the roller is heated by a magnetic flux generation mechanism provided inside each roller, and this is rotated in the same direction. At the same time, the yarn T is traveled in the axial direction of the roller while being attached to the surface of the roller so as to straddle between both rollers, and the yarn T is heated and stretched in the process. In this case, there is a case where only one roller is used, and the yarns are attached to the roller and heated and stretched.
[0003]
FIG. 3 is a cross-sectional view of the upper half of the main part of a conventional induction heating roller device. An iron core 3 and an induction coil 4 supported by a fixed platen 2 are provided inside a rotating roller body 1. A magnetic flux generation mechanism 5 is installed, and a plurality of holes extending in the axial direction of the roller body 1 are provided in the peripheral wall of the roller body 1 to form a jacket chamber 6, and a gas-liquid two-phase heat medium is enclosed therein. It is configured. Reference numeral 7 denotes a communication groove that communicates each end of each jacket chamber 6.
[0004]
By providing a jacket chamber 6 and enclosing a gas-liquid two-phase heat medium therein, the temperature of the surface of the peripheral wall of the roller body 1 is similar to the temperature distribution curve shown in FIG. It is well known that it is uniform along the axial direction. When the yarn is heated and stretched using such a roller, it is very suitable to continuously heat the yarn at a predetermined temperature from the beginning to the end when the yarn is attached to the roller body.
[0005]
According to such a configuration, the yarns are heated at a predetermined temperature based on the heat generation temperature of the roller from the beginning when the roller body 1 is assembled. Therefore, the heat shock applied to the yarns from the beginning inevitably increases. On the other hand, some types of yarns require heating while gradually raising the heating temperature without giving such a large heat shock from the beginning. On the other hand, there are some which require heating at a predetermined temperature from the beginning and then heating while gradually decreasing the temperature.
[0006]
However, in the conventional structure, the heating temperature of the yarns, and thus the surface temperature of the roller body, cannot be gradually and gradually changed along the axial direction in the process of heating and stretching while being attached to the roller body. Therefore, the heating temperature of the yarns as described above cannot be adjusted, and there is an inconvenience that a predetermined heat treatment cannot be performed.
[0007]
[Problems to be solved by the invention]
The present invention provides a structure comprising a pair of induction heat generating rollers used for heating and drawing yarns, and the surface temperature along the axial direction of the roller body can be gradually and continuously increased or decreased. Objective.
[0008]
[Means for Solving the Problems]
The present invention is characterized in that the magnetic flux generating mechanism disposed inside the roller body is partially installed along the axial direction of the roller body.
[0009]
Of the peripheral wall of the roller body, the part facing the part where the magnetic flux generation mechanism is installed generates heat up to a predetermined temperature. A portion adjacent to the heat generating portion, that is, a non-heat generating portion not facing the magnetic flux generating mechanism is heated only by heat conduction from the heat generating portion and rises in temperature. Then, the temperature of the non-heat generating portion gradually decreases as the distance from the heat generating portion increases. In this way, the surface temperature of the roller body changes continuously and gradually along the axial direction.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIG. A shaft 8 is connected to the roller body 1 and is rotatably supported by a bearing 10 of a bearing case 9. A fixed platen 2 is fixed to the bearing case 9 by screws 11, and the fixed platen 2 is disposed so as to cover the opening surface of the roller body 1 so as to cover it.
[0011]
The fixed platen 2 supports a magnetic flux generating mechanism 5 including an iron core 3 coaxial with the roller body 1 and an induction coil 4. When the induction coil 2 is excited by an AC power source, a current is induced on the peripheral wall of the roller body 1 to generate heat. These configurations are not particularly different from ordinary induction heat generating rollers.
[0012]
In accordance with the present invention, the magnetic flux generating mechanism 5 disposed inside the roller body 1 is partially installed along the axial direction of the roller body 1. The configuration example shown in FIG. 1 is installed only inside the tip end side of the roller body 1 (the end side opposite to the bearing case 9 side).
[0013]
A jacket chamber 6 is formed only inside the peripheral wall of the roller body 1 facing the magnetic flux generation mechanism 5. The tip of the fixed platen 2 extends to the inside of the roller body 1 where the jacket chamber 6 is not provided, and the magnetic flux generating mechanism 5 is supported by the extended end.
[0014]
In such a configuration, when the roller body 1 is heated by exciting the magnetic flux generation mechanism 5, the portion M facing the portion where the magnetic flux generation mechanism 5 is installed generates heat and rises to a predetermined temperature. Further, the surface temperature of the heat generating portion M is made uniform by the gas-liquid two-phase heat medium in the jacket chamber 6 there.
[0015]
In this way, the non-heat generating portion N that is continuously adjacent to the heat generating portion M that generates heat and does not face the magnetic flux generating mechanism 5 is heated by heat conduction from the heat generating portion M, and the temperature rises. . The temperature of the non-heat generating portion N decreases continuously and gradually as it moves away from the heat generating portion M. FIG. 2 shows this state, and shows the roller body 1 and the surface temperature distribution corresponding thereto.
[0016]
Assuming that the yarns are moved from the base end side (end portion on the bearing case 9 side) of the roller body 1 toward the opposite tip side, the yarns are initially moved from a low temperature at the non-heat generating portion N. It is gradually heated. Only when the heat generation point M is reached, it is heated at a predetermined temperature. As a result, the yarns can be heated and stretched without giving a heat shock at the beginning.
[0017]
On the contrary, when the yarns are made to travel toward the proximal end while being gathered from the leading end side of the roller body, the yarns are heated at a predetermined temperature from the beginning by the heating point M, and then gradually reach the non-heating point N. It will be heated at a temperature that decreases to a low. Even if the magnetic flux generating mechanism 5 and the jacket chamber 6 are provided on the proximal end side of the roller body 1 and the yarns are caused to travel from the proximal end side to the distal end side of the roll body 1, the yarns are heated with the same tendency. It can be stretched.
[0018]
Although the above description is about the configuration in which the magnetic flux generation mechanism 5 and the jacket chamber 6 are installed so as to be biased toward the end of the roller body 1, they may be installed at the center along the axial direction of the roller body 1. Good. In that case, the non-heat generating part N exists in the both ends of the roller main body 1, and the heat generating part M exists between them. Therefore, when the yarns are traveled from one end of the roller body 1 toward the other end, the yarns are gradually heated at a low temperature first, then at a predetermined temperature, and then at a lower temperature again. Will come to be.
[0019]
Further, the magnetic flux generation mechanism 5 and the jacket chamber 6 may be installed separately at the end portions on both sides of the roller body 1. In this case, the heat generating points M are present at both ends of the roller body 1 and the non-heat generating points N are present therebetween. In this case, when the yarn is moved from one end of the roller body 1 to the other end, the yarn is initially at a predetermined temperature, at the next lower temperature, and then again at the predetermined temperature. It gradually begins to heat up.
[0020]
When manufacturing the roller body 1, one roller body 1 may be formed with a part facing the magnetic flux generation mechanism 5 and a part not facing each other, but in practice, as shown in FIG. When the communication groove 7 is provided at the center of the peripheral wall of the roller body 1, it is difficult to provide the communication groove 7.
[0021]
In order to solve this, the roller body 1 is divided into roller body portions 1A and 1B, and one roller body portion 1A is a portion facing the magnetic flux generating mechanism 5, and the jacket chamber 6 and the communication groove are provided here. 7 may be provided. The other roller body portion 1B is a portion that does not face the magnetic flux generation mechanism.
[0022]
Then, the opposite end portions of the roller main body portions 1A and 1B are butted together, and the butted portions are connected by welding or friction welding to manufacture the roller main body 1. In the figure, P indicates the matching part. As a result, the communication groove 7 can be easily provided in the center of the peripheral wall of the roller body 1.
[0023]
【The invention's effect】
As described above, according to the present invention, when the yarns are heated and stretched together with the induction heat generating roller, a heat generating portion and a non-heat generating portion can be continuously formed on the surface of the roller. Since the heating temperature in the course of yarn travel can be changed continuously and gradually, there is an effect that heat treatment can be performed smoothly according to the type of yarn.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of the upper half portion showing the surface temperature distribution of the roller body in the configuration of FIG. 1;
FIG. 3 is an enlarged cross-sectional view of the upper half portion showing the distribution of the surface temperature in the configuration of the conventional example.
FIG. 4 is a schematic perspective view of an induction heat roller device showing a state in which yarns are heated and stretched.
[Explanation of symbols]
1 Roller Body 5 Magnetic Flux Generation Mechanism A Induction Heating Roller T Thread M Heating Part N Non-heating Part

Claims (1)

In an induction heating roller device including a roller body that has a magnetic flux generation mechanism installed therein and travels while gathering yarns on a peripheral surface, the magnetic flux generation mechanism is partially extended along the axial direction of the roller body. The surface portion of the roller body that is installed and faces the magnetic flux generation mechanism is a heat generation location, the portion that is adjacent to the heat generation location and does not face the magnetic flux generation mechanism is a non-heat generation location, and the non-heat generation location Is an induction heating roller device that is heated by heat conduction from the heat generating portion.

Images