JPH089176Y2 - Yarn heating roller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a yarn heating roller, particularly a drawn heat treatment roller, in a synthetic fiber manufacturing facility.

(Prior Art) Fiber drawing and heat treatment techniques have been actively studied in the past, and as for the apparatus, many are related to draw heat treatment rollers.

The draw heat treatment roller is an important factor that influences the quality of the fiber and the spinnability, and it is important to make the temperature uniform within a certain range in the length direction of the roller.

Therefore, it is well known that a jacket roller or a roller having a heat pipe inserted therein has been conventionally used.

In recent years, where higher performance of fibers is further required, for example, a heating roller having a heating coil for low temperature and a heating coil for high temperature has been devised in order to provide a temperature difference between the yarn entry side and the yarn exit side. ing.

Many of these have an independent jacket chamber or heat pipe in order to keep the temperature difference between the yarn entry side and the yarn exit side uniform. In such a roller, temperature detection sensors are attached to the leading end portion and the trailing end portion of the roller in order to individually detect and control the temperatures of the yarn entry side and the yarn exit side.

Generally, the temperature of the rear end of the roller is detected by inserting a temperature sensor into a circular groove provided in the circumferential direction at the rear end of the roller. It is inserted in the hole drilled in the direction.

In order to set the roller surface temperature on the thread entry side and the thread exit side individually, and to set the roller surface temperatures of the thread entry side and the thread exit side individually and make them uniform, each heat pipe is independent. Is usually inserted near the roller surface.

Also, in order to improve temperature uniformity, dozens of heat pipes are often inserted in the circumferential direction. However, in a roller in which the roller diameter increase rate R {R = (large diameter−small diameter) / small diameter} is R = 10% or less, the heat pipes corresponding to the yarn entry side and the yarn exit side have different radial dimensions. It is difficult to arrange them on the circumference of a circle, and each heat pipe must be inserted into the same hole drilled in the length direction of the roller.

However, in this case, it is not desirable to bring the heat pipes into contact with each other in consideration of heat conduction between the heat pipes, but if they are inserted separately, in the unlikely event of a heat pipe failure on the roller thread take-out side, the heat pipes cannot be taken out from the rollers. There was a problem when the heat pipe could not be replaced.

(Purpose of the Invention) The present invention has been made to solve such a problem, and a heating roller that keeps a uniform temperature within different surface temperatures, in particular, the diameter of the roller is from the thread insertion side to the thread ejection side. Even in a draw heat treatment roller having a roller diameter increasing rate R of 10% or less, independent heat pipes can be inserted into the yarn entry side and the yarn exit side having different surface temperatures. (EN) Provided is a drawing heat treatment roller capable of keeping the surface temperatures on the entrance side and the yarn exit side uniform in the roller length direction.

(Structure of the Invention) That is, the present invention is characterized in that, in a yarn heating roller having different surface set temperatures, a heat pipe, which is divided into several parts in the length direction through a heat insulating member and is connected, is mounted in the roller axial direction. And the yarn heating roller.

(Example) Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a side view including a partial cross section showing an embodiment of the present invention, and FIG. 2 is an enlarged view of the heat pipe section of FIG.

In the figure, reference numeral 1 is a drawing heat treatment roller according to the present invention, which comprises a roller body 3 mounted on a drive shaft 2, an iron core 4 disposed inside the roller body 3, and a coil wound around the iron core 4. 5, 6 and the like are included, and by exciting the coils 5, 6 with an AC power source, an alternating magnetic flux is generated in the magnetic path formed by the iron core 4 and the roller body 3 and the shell portion 3a of the roller body 3 is generated. Is induction heated.

Here, the outer shape of the shell portion 3a of the roller body 3 is the thread entry side I.
And the yarn discharge side O have straight portions 3b and 3c, respectively, and between these straight portions 3b and 3c, a taper portion 3d is formed in which the roller diameter linearly increases in the length direction toward the yarn discharge side O. It has a shape.

The coils 5 and 6 are separately wound in the lengthwise direction so that the roller surface temperatures can be set differently on the yarn entry side and the yarn exit side. Further, two heat pipes 7 and 8 are inserted in series in the shell portion 3a in parallel with the axial direction of the roller, and these heat pipes 7 and 8 are arranged at equal intervals in the circumferential direction of the shell portion 3a. A plurality are arranged.

Since the roller surface temperature is different between the yarn entrance side I and the yarn exit side O as described above, the working fluids in the heat pipes 7 and 8 are inserted in series so as not to flow from the yarn exit side O to the yarn entrance side I. The heat pipes 7 and 8 have an independent structure.

The two heat pipes 7 and 8 are inserted into a hole 10 formed from the front end side of the shell portion 3a, and they are integrally formed with a heat insulating member 9 interposed as shown in FIG. ing.
That is, the screw shafts 7a and 8a are provided at the end portions of the heat pipes 7 and 8, and the screw shafts 7a and 8a are provided at both ends of the heat insulating member 9 having a predetermined length.
9a and 9b are screwed together to form a single body, and are connected at intervals so that they do not conduct heat to each other.

The heat insulating member 9 is preferably arranged at a position substantially corresponding to the boundary between the high temperature setting portion and the low temperature setting portion of the roller. Because they are different, they cannot always be uniquely defined. Reference numerals 11 and 12 are temperature sensor insertion holes.

Since the plurality of heat pipes 7 and 8 are connected to the shell part 3a in a state of being connected in series via the heat insulating member 9 as described above, the heat pipe 8 on the back side, which is the yarn entry side I, fails. Can be easily taken out and replaced, and any temperature adjustment in the length direction of the roller can be performed accurately and easily.

The roller shape has been described above in which the roller diameter increases linearly from the thread entry side to the thread exit side, and the thread entry side and the thread exit side each have a straight portion with a constant length. It goes without saying that the present invention can be applied to rollers having the same roller diameter or other shapes from the entrance side to the thread exit side.

Further, the number of heat pipes is not limited to two, and three or more heat pipes may be connected via a heat insulating member.

(Effect of the Invention) As described above, according to the present invention, the surface temperatures of the yarn entry side and the yarn exit side can be uniformly and accurately maintained in the roller length direction, respectively, and at the same time, the yarn formability is improved and the quality is improved. It is possible to stably obtain excellent products of.

[Brief description of drawings]

FIG. 1 is a side view including a partial cross section showing an embodiment of the present invention,
FIG. 2 is an enlarged view of the heat pipe section of FIG. 3 ... roller body, 3a ... shell part, 5, 6 ... coil,
7,8 …… Heat pipe, 9 …… Heat insulation material

Claims (3)

[Scope of utility model registration request] 1. A yarn heating roller having different surface set temperatures, wherein a heat pipe, which is divided into several parts in a lengthwise direction through a heat insulating member and is connected, is attached in a roller axial direction. roller. 2. The yarn heating roller according to claim 1, wherein the heat pipes are connected in the length direction via a heat insulating member so as to correspond to the roller yarn input side and the yarn discharge side. 3. The yarn heating roller linearly increases in the length direction from the yarn entry side to the yarn exit side, and straight portions of a predetermined length are formed on the yarn entry side and the yarn exit side, respectively. The yarn heating roller according to Item 1 or 2.