JP2022188749A - Heater and yarn processor - Google Patents

Abstract

To suppress temperature drop of a yarn running space and the like due to disturbance and immediately raise temperature of the yarn running space and the like even if the temperature of the yarn running space and the like drops.SOLUTION: A first heater 13 (heater) for heating a yarn Y running in a yarn running space S has a heat source 51 and a heating portion 52. The heating portion 52 is configured so as to be heated by the heat source 51 and form the yarn running space S extending at least in a predetermined first direction. The heating portion 52 has a first heating member 53 formed of a first material and a second heating member 54 formed of a second material. A cross section orthogonal to the first direction of the second heating member 54 is disposed at least between the heat source 51 and the yarn running space S. Volume specific heat of the second material is lower than volume specific heat of the first material.SELECTED DRAWING: Figure 4

Description

The present invention relates to a heating device for heating yarn and a yarn processing machine provided with the heating device.

Patent Literature 1 discloses a heat treatment device (heating device) for heating yarn during yarn processing such as false twisting. The heating device includes a sheathed heater (heat source) and a heater main body (heating section). The heating section is configured to be heated by a heat source and configured to form a predetermined yarn running space in which the yarn runs. More specifically, the heating section has a heating plate made of a copper alloy. In general, copper alloys have a relatively large heat capacity. Therefore, it is possible to suppress, to some extent, the cooling of the heating portion due to external disturbances (for example, outside air enters the yarn running space for some reason).

JP-A-2002-146640

In general, in order to reliably suppress temperature fluctuations of the heating section due to disturbance, the heat capacity of the heating section should be greatly increased. However, in that case, the heating device may become very large. Therefore, in consideration of the balance between suppressing the size of the apparatus and suppressing temperature fluctuations due to disturbances, the heating unit is generally designed to have a certain amount of heat capacity. However, in such a configuration, once the temperature of the heating section drops due to disturbance, the temperature of the yarn running space and/or the members forming the yarn running space (hereinafter referred to as the yarn running space, etc.) also drops. In this case, it may take time to return the temperatures of the heating section and the yarn running space to the set temperatures.

SUMMARY OF THE INVENTION An object of the present invention is to suppress a decrease in the temperature of the yarn running space or the like due to disturbance, and to quickly raise the temperature of the yarn running space or the like even if the temperature of the yarn running space or the like drops.

A heating device according to a first aspect of the present invention includes a heat source, and a heating section configured to be heated by the heat source and configured to form a yarn running space extending at least in a predetermined first direction. a heating device for heating the yarn running in the yarn running space, wherein the heating unit is arranged so as not to come into contact with the yarn running in the yarn running space and is made of a first material; 1 heating member, which is arranged at least between the heat source and the yarn traveling space in a cross section orthogonal to the first direction, and arranged so as not to contact the yarn traveling in the yarn traveling space; and a second heating member made of a second material having a lower volumetric specific heat than the first material.

By using a material that has a relatively high volumetric specific heat as the first material that constitutes the first heating member, it is possible to suppress a decrease in the temperature of the heating portion due to disturbance to some extent. Furthermore, according to the present invention, the temperature of the second heating member made of the second material having a low volumetric specific heat can be raised more quickly than the temperature of the first heating member. As a result, the yarn running space and the like can be rapidly heated via the second heating member arranged between the heat source and the yarn running space (detailed definition will be described later). Therefore, such rapid heating can suppress a decrease in the temperature of the yarn running space or the like due to disturbance. Moreover, even if the temperature of the yarn running space or the like drops due to disturbance, the temperature of the yarn running space or the like can be quickly raised.

A heating device according to a second invention is characterized in that, in the first invention, the second heating member is in contact with the heat source.

In the present invention, the heat generated by the heat source can be rapidly transferred to the second heating member. Therefore, it is possible to effectively raise the temperature of the second heating member.

A heating device according to a third invention is characterized in that, in the first or second invention, the second heating member is in contact with the first heating member.

For example, a heat source for heating the first heating member and a heat source for heating the second heating member may be provided separately, and the second heating member may be arranged separately from the first heating member. However, in that case, the manufacturing cost of the heating device increases due to the increase in the component cost of the heat source. In the present invention, the second heating member is in contact with the first heating member. Therefore, it is possible to quickly heat the first heating member via the second heating member while suppressing an increase in manufacturing cost.

A heating device according to a fourth invention is the heating device according to any one of the first to third inventions, wherein the ratio of the heat capacity of the second heating member to the heat capacity of the first heating member is 20% or more and 40% or less. It is characterized by

If the heat capacity of the second heating member is relatively too small, when the temperature of the heating section drops due to disturbance, it may take time for the yarn running space and the like to be warmed up again. However, if the heat capacity of the second heating member is relatively too large, the temperature of the heating section may easily fluctuate even with a small disturbance, and the temperature of the yarn running space and the like may rather become unstable. In the present invention, the heat capacity of the second heating member is neither too large nor too small with respect to the heat capacity of the first heating member. Therefore, the heating section can be somewhat resistant to disturbance, and the temperature of the yarn running space and the like can be quickly raised.

A heating device according to a fifth aspect of the invention is characterized in that, in any one of the first to fourth aspects of the invention, the second material includes a fibrous material.

In the present invention, the thermal conductivity of the second material can be made anisotropic by orienting the fiber material in a specific direction. Therefore, heat can be transferred very quickly, especially in the direction in which it is desired to transfer heat.

A heating device according to a sixth aspect of the invention is characterized in that, in the fifth aspect of the invention, the fibrous material is carbon fiber.

Carbon fiber is a lightweight material with high thermal conductivity. Therefore, heat can be transferred very quickly in the desired direction of heat transfer. Moreover, the weight of the heating device can be reduced.

A seventh aspect of the present invention is a heating device according to the sixth aspect, wherein the carbon fibers are pitch-based fibers.

Pitch-based carbon fibers and PAN-based carbon fibers are generally known as carbon fibers. In general, pitch-based carbon fibers have higher thermal conductivity than PAN-based carbon fibers. In the present invention, by using pitch-based carbon fiber as the carbon fiber, the thermal conductivity can be further increased.

A heating device according to an eighth invention is characterized in that, in the sixth or seventh invention, the second material is a composite material of the carbon fiber and graphite.

Composite materials of carbon fiber and graphite have very high thermal conductivity. Therefore, by using a composite material of carbon fiber and graphite as the second material, the thermal conductivity can be further increased.

A heating device according to a ninth invention is characterized in that, in the sixth or seventh invention, the second material is a composite material of the carbon fiber and resin.

A composite material of carbon fiber and resin is less expensive than a composite material of carbon fiber and graphite. Therefore, by using a composite material of carbon fiber and resin as the second material, an increase in the manufacturing cost of the heating device can be suppressed.

A heating device according to a tenth aspect is the heating device according to any one of the first to ninth aspects, wherein the second heating member is arranged to extend at least in the first direction, and the second material is the first heating member. It is characterized by having a high thermal conductivity at least in the first direction compared to the material.

In the present invention, heat can be rapidly transferred in the first direction through the second heating member. Therefore, it is possible to suppress temperature variations in the yarn traveling space in the first direction.

A heating device according to an eleventh aspect is the heating device according to any one of the first to tenth aspects, wherein the direction in which a predetermined imaginary straight line extending from the heat source toward the yarn traveling space extends in a cross section perpendicular to the first direction is the heating device. When two directions are used, the second material has a higher thermal conductivity in at least the second direction than the first material.

In the present invention, heat can be rapidly transferred from the heat source to the yarn running space or the like via the second heating member. Therefore, it is possible to rapidly raise the temperature of the yarn running space and the like.

According to a twelfth invention, in any one of the first to eleventh inventions, the heating unit has a contact member that extends at least in the first direction and is for contacting the yarn. and

In the configuration in which the contact member is provided as in the present invention, the temperature of the contact member can be effectively raised by rapidly raising the temperature of the second heating member.

According to a thirteenth invention, in the twelfth invention, the contact member is in contact with the second heating member.

In the present invention, it is possible to effectively raise the temperature of the contact member through heat conduction between the contact member and the second heating member whose temperature is rapidly raised.

A heating device according to a fourteenth invention is characterized in that, in the twelfth or thirteenth invention, the contact member is configured to be detachable from the heating section.

In general, when the yarn is processed while running, an oil agent is applied to the yarn so that the yarn runs smoothly. If such oil and/or scum accumulates on the contact member, it may interfere with normal running of the yarn, so the contact member needs to be cleaned periodically. In the present invention, since the contact member can be temporarily removed from the heating unit, the efficiency of maintenance such as cleaning of the contact member (removal of oil, etc.) can be greatly improved.

A yarn processing machine according to a fifteenth invention comprises the heating device according to any one of the first to fourteenth inventions, a yarn deformation imparting device for imparting deformation to the yarn, and the heating device and the yarn deformation imparting device. and a yarn feeding device configured to feed the yarn and for causing the yarn to travel, and the yarn is configured to be processed while the yarn is traveling.

In the present invention, it is possible to suppress the fluctuation of the heating temperature required for processing the yarn due to disturbance. Therefore, fluctuations in the quality of the yarn processed by the yarn processing machine can be suppressed.

1 is a side view of a false twisting machine for carrying out the method for manufacturing textured yarn of the present embodiment; FIG. FIG. 4 is a schematic diagram of a false twisting machine developed along the yarn path. (a) to (d) are explanatory diagrams showing the first heating device. It is an enlarged view of FIG.3(b). 4 is a table showing physical property values of a first heating member and a second heating member; 5 is a table showing physical property values of a first heating member and a second heating member according to a modified example; FIG. 11 is a cross-sectional view orthogonal to the first direction of the first heating device according to another modification;

Next, an embodiment of the invention will be described. The direction perpendicular to the plane of FIG. 1 is the longitudinal direction of the machine, and the lateral direction of the plane of FIG. 1 is the width direction of the machine. A direction orthogonal to both the machine base longitudinal direction and the machine base width direction is defined as the up-down direction (vertical direction) in which gravity acts. The machine base longitudinal direction and machine base width direction are directions substantially parallel to the horizontal direction.

(Overall Configuration of False Twisting Machine)
First, the overall configuration of a false twisting machine 1 (yarn processing machine of the present invention) for carrying out the method of manufacturing textured yarn of the present embodiment will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a side view of the false twisting machine 1. FIG. FIG. 2 is a schematic diagram of the false twisting machine 1 developed along the path of the yarn Y (yarn path).

The false twisting machine 1 is configured to be able to false twist a yarn Y made of synthetic fibers. Yarn Y is, for example, a multifilament yarn made up of a plurality of filaments. Alternatively, the yarn Y may consist of one filament. The false twisting machine 1 includes a yarn supplying section 2 , a processing section 3 and a winding section 4 . The yarn supplying section 2 is configured to be able to supply the yarn Y. As shown in FIG. The processing section 3 is configured to pull out the yarn Y from the yarn supplying section 2 and subject it to false twisting. The winding section 4 is configured to wind the yarn Y processed by the processing section 3 onto a winding bobbin Bw. A plurality of constituent elements of the yarn feeding section 2, the processing section 3, and the winding section 4 are arranged in the longitudinal direction of the machine base (see FIG. 2). The longitudinal direction of the machine base is a direction orthogonal to the running surface of the yarn Y (the paper surface of FIG. 1) formed by the yarn path from the yarn supplying section 2 through the processing section 3 to the winding section 4 .

The yarn supplying section 2 has a creel stand 7 that holds a plurality of yarn supplying packages Ps, and supplies a plurality of yarns Y to the processing section 3 . The processing section 3 is configured to pull out a plurality of yarns Y from the yarn supplying section 2 and process them. The processing section 3 includes, for example, a first feed roller 11 (yarn feeding device of the present invention), a twist stop guide 12, a first heating device 13 (heating device of the present invention), and a cooling device in order from the upstream side in the yarn traveling direction. 14. False twisting device 15 (yarn deformation imparting device of the present invention), second feed roller 16, interlacing device 17, third feed roller 18, second heating device 19, and fourth feed roller 20 are arranged. ing. The winding unit 4 has a plurality of winding devices 21 . Each winding device 21 winds the false-twisted yarn Y in the processing unit 3 onto a winding bobbin Bw to form a winding package Pw.

The false twisting machine 1 has a main frame 8 and a winding frame 9 spaced apart in the width direction of the frame. The main machine base 8 and the winding base 9 are provided so as to extend substantially the same length in the longitudinal direction of the machine base. The main machine base 8 and the winding base 9 are arranged so as to face each other in the width direction of the machine base. The false twisting machine 1 has a unit called a span including a set of a main machine base 8 and a winding base 9 . In one span, each device is arranged so that a plurality of yarns Y running in parallel in the longitudinal direction of the machine base can be false twisted at the same time. In the false twisting machine 1, the span is arranged symmetrically with respect to the center line C of the main machine base 8 in the width direction of the machine base. is). Also, a plurality of spans are arranged in the machine base longitudinal direction.

(Construction of processing unit)
The configuration of the processing unit 3 will be described with reference to FIGS. 1 and 2. FIG. The first feed roller 11 is configured to unwind the yarn Y from the yarn supply package Ps attached to the yarn supply section 2 and feed it to the first heating device 13 . The first feed roller 11 is configured, for example, to feed one yarn Y to the first heating device 13 as shown in FIG. Alternatively, the first feed roller 11 may be configured to be able to feed a plurality of adjacent yarns Y to the downstream side in the yarn running direction. The twist stop guide 12 is configured so that the twist imparted to the yarn Y by the false twisting device 15 does not propagate upstream of the twist stop guide 12 in the yarn running direction.

The first heating device 13 is configured to heat the yarn Y fed from the first feed roller 11 . The first heating device 13 is, for example, configured to be able to heat two yarns Y as shown in FIG. More details of the first heating device 13 will be described later.

The cooling device 14 is configured to cool the yarn Y heated by the first heating device 13 . The cooling device 14 is configured to cool one yarn Y, for example, as shown in FIG. Alternatively, the cooling device 14 may be configured to be able to cool a plurality of yarns Y at the same time. The false twisting device 15 is arranged downstream of the cooling device 14 in the running direction of the yarn, and is configured to twist the yarn Y. As shown in FIG. The false twisting device 15 is, for example, a so-called disc friction type false twisting device, but is not limited thereto. The second feed roller 16 is configured to feed the yarn Y processed by the false twisting device 15 to the entangling device 17 . The speed at which the yarn Y is conveyed by the second feed roller 16 is higher than the speed at which the yarn Y is conveyed by the first feed roller 11 . Thereby, the yarn Y is drawn and false-twisted between the first feed roller 11 and the second feed roller 16 .

The entangling device 17 is configured to entangle the yarn Y. As shown in FIG. The entangling device 17 has, for example, a known interlacing nozzle that entangles the yarn Y by airflow.

The third feed roller 18 is configured to feed the yarn Y running downstream of the interlacing device 17 in the yarn running direction to the second heating device 19 . The third feed roller 18 is configured, for example, to feed one yarn Y to the second heating device 19 as shown in FIG. Alternatively, the third feed roller 18 may be configured to be able to feed a plurality of adjacent yarns Y to the downstream side in the yarn running direction. The speed at which the yarn Y is conveyed by the third feed roller 18 is slower than the speed at which the yarn Y is conveyed by the second feed roller 16 . Therefore, the yarn Y is slackened between the second feed roller 16 and the third feed roller 18 . The second heating device 19 is configured to heat the yarn Y sent from the third feed roller 18 . The second heating devices 19 extend in the vertical direction and are provided in each span. The fourth feed roller 20 is configured to feed the yarn Y heated by the second heating device 19 to the winding device 21 . The fourth feed roller 20 is configured, for example, to feed one yarn Y to the winding device 21 as shown in FIG. Alternatively, the fourth feed roller 20 may be configured to be able to feed a plurality of adjacent yarns Y to the downstream side in the yarn running direction. The speed at which the yarn Y is conveyed by the fourth feed roller 20 is slower than the speed at which the yarn Y is conveyed by the third feed roller 18 . Therefore, the yarn Y is slackened between the third feed roller 18 and the fourth feed roller 20. As shown in FIG.

In the processing section 3 configured as described above, the yarn Y stretched between the first feed roller 11 and the second feed roller 16 is twisted by the false twisting device 15 . The twist formed by the false twisting device 15 propagates up to the twist stop guide 12, but does not propagate upstream of the twist stop guide 12 in the yarn running direction. The yarn Y, which is drawn and twisted, is heated by the first heating device 13 and thermally fixed, and then cooled by the cooling device 14 . The yarn Y is untwisted downstream of the false twisting device 15 in the yarn traveling direction, but the yarn Y is maintained in a wavy false twisted state by the heat setting described above (that is, the crimp of the yarn Y is maintained). is done).

The false-twisted yarn Y is loosened between the second feed roller 16 and the third feed roller 18, and after being entangled by the interlacing device 17, or as it is without being plied. Guided downstream in the direction of travel. Furthermore, the yarn Y is heat-treated by the second heating device 19 while being relaxed between the third feed roller 18 and the fourth feed roller 20 . Finally, the yarn Y fed from the fourth feed roller 20 is wound by the winding device 21 .

(Structure of Winding Part)
The configuration of the winding unit 4 will be described with reference to FIG. 2 . The winding unit 4 has a plurality of winding devices 21 . Each winding device 21 is configured to be able to wind the yarn Y around one winding bobbin Bw. The winding device 21 has a fulcrum guide 41 , a traverse device 42 and a cradle 43 . The fulcrum guide 41 is a guide that serves as a fulcrum when the yarn Y is traversed. The traverse device 42 is configured to traverse the yarn Y with a traverse guide 45 . The cradle 43 is configured to rotatably support the winding bobbin Bw. A contact roller 46 is arranged near the cradle 43 . The contact roller 46 contacts and applies contact pressure to the surface of the winding package Pw. In the winding unit 4 configured as described above, the yarn Y sent from the fourth feed roller 20 is wound by each winding device 21 onto the winding bobbin Bw to form the winding package Pw.

(First heating device)
Next, a more specific configuration of the first heating device 13 will be described with reference to FIGS. 3(a) to 3(d). FIG. 3(a) is a view of the first heating device 13 as seen from the longitudinal direction of the machine base, and the direction in which the first heating device 13 extends (the first direction described later) is the horizontal direction of the paper. 1 is a diagram describing a heating device 13. FIG. FIG. 3(b) is a cross-sectional view taken along line Ab-Ab of FIG. 3(a). FIG. 3(c) is a cross-sectional view taken along line Ac-Ac in FIG. 3(b). FIG. 3(d) is a cross-sectional view taken along line Ad-Ad in FIG. 3(b). A direction orthogonal to both the machine base longitudinal direction and the first direction is defined as a height direction (see FIG. 3(b)). In FIGS. 3A to 3D, the upper side of the paper is defined as one side in the height direction, and the lower side of the paper is defined as the other side in the height direction.

The first heating device 13 is configured to heat the running yarn Y. As shown in FIG. In this embodiment, the first heating device 13 is configured to be able to heat two threads Y (yarns Ya and Yb). The first heating device 13 extends in a predetermined first direction perpendicular to the longitudinal direction of the machine base (see FIG. 3(a), etc.). The first heating device 13 has a heat source 51 and a heating section 52 . The first heating device 13 simultaneously heats the running yarns Ya and Yb by the heating unit 52 heated by the heat source 51 .

The heat source 51 has, for example, a known sheathed heater (electric heater). A sheathed heater is a device that has a heating wire (eg, a coil) and a pipe surrounding the heating wire. A sheathed heater generates Joule heat when an electric current flows through the heating wire. The heat source 51 extends in the first direction (see FIG. 3(c)). The heat source 51 has, for example, a substantially circular shape in a cross section perpendicular to the first direction (see FIG. 3B), but is not limited to this. The heat source 51 is electrically connected to a control device 100 (see FIG. 3C) that controls the heating temperature (the temperature of the heating section 52). The control device 100 is configured to be able to set the heating temperature of the first heating device 13 . The control device 100 controls the first heating device 13 based on the set heating temperature value. For example, the control device 100 may control the first heating device 13 in consideration of the set heating temperature and the detection result of a temperature sensor (not shown) that detects the actual temperature of the heating unit 52. good.

The heating unit 52 is configured to be heated by heat generated by the heat source 51 . The heating part 52 extends in the first direction along the heat source 51 (see FIG. 3(c)). The heating portion 52 is formed with a yarn running space S (see FIGS. 3B and 3D) for running the yarn Y, which extends at least in the first direction. In this embodiment, as shown in FIG. 3B, two yarn running spaces S (yarn running spaces Sa, Sb) are formed in which two yarns Ya, Yb run respectively. The heating unit 52 heated by the heat source 51 heats the yarn Ya traveling in the yarn traveling space Sa and the yarn Yb traveling in the yarn traveling space Sb. More details of the heating unit 52 will be described later.

Here, in general, in order to reliably suppress temperature fluctuations of the heating unit 52 due to external disturbances (for example, external air suddenly blowing onto the heating unit 52), the heat capacity of the members forming the heating unit 52 must be set to a very high value. should be made as large as However, in that case, the first heating device 13 may become very large. Therefore, in consideration of the balance between suppressing the size increase of the first heating device 13 and suppressing temperature fluctuations due to disturbance, the heating unit 52 is generally designed to have a certain amount of heat capacity. However, in such a configuration, once the temperature of the heating section 52 drops due to disturbance, the temperature of the yarn running space S and/or the members forming the yarn running space S (hereinafter referred to as the yarn running space S, etc.) also drops. put away. In this case, it may take time to return the temperatures of the heating section 52 and the yarn running space S to the set temperatures. Therefore, the first heating device 13 is provided in order to suppress the decrease in the temperature of the yarn running space S due to disturbance and to quickly raise the temperature of the yarn running space S even if the temperature of the yarn running space S drops. further has the following configuration:

(Detailed configuration of the first heating device)
A detailed configuration of the first heating device 13 will be described with reference to FIGS. 3(a) to 5. FIG. FIG. 4 is an enlarged view of FIG. 3(b). FIG. 5 is a table showing physical property values of a material forming the first heating member 53 and a material forming the second heating member 54, which will be described later. In FIG. 4, the left side of the paper surface is defined as one side in the longitudinal direction of the machine base, and the right side of the paper surface is defined as the other side in the longitudinal direction of the machine base.

As shown in FIGS. 3B and 4, the heating unit 52 includes, for example, two first heating members 53, two second heating members 54, and two contact blocks 55 (contact members of the present invention). and The two first heating members 53 include first heating members 53a, 53b. The two second heating members 54 include second heating members 54a, 54b. The two contact blocks 55 include contact blocks 55a, 55b. The first heating member 53a, the second heating member 54a and the contact block 55a are members for heating the yarn Ya. The first heating member 53b, the second heating member 54b and the contact block 55b are members for heating the yarn Yb. The member for heating the yarn Ya and the member for heating the yarn Yb are arranged, for example, at positions opposite to each other with the heat source 51 interposed therebetween in the machine base longitudinal direction.

A member for heating the yarn Ya will be described. The first heating member 53a is an elongated member extending in the first direction along the heat source 51 . A material (first material) forming the first heating member 53 is a metal material having a large volumetric specific heat, such as brass. Volumetric specific heat is a value obtained by multiplying the specific heat of a material (heat capacity per unit mass) by the density of the material (mass per unit volume). As shown in FIG. 4, the first heating member 53a has, for example, a substantially L-shaped cross section orthogonal to the first direction. However, the shape of the first heating member 53a is not limited to this. The first heating member 53a is arranged on one side of the heat source 51 in the machine base longitudinal direction. The first heating member 53a is arranged apart from the heat source 51, for example.

The second heating member 54a is an elongated member extending in the first direction along the heat source 51, like the first heating member 53a. The second heating member 54 is made of a second material (details will be described later) having a smaller volumetric specific heat than the first material. As shown in FIG. 4, the second heating member 54a has, for example, a substantially rectangular cross section perpendicular to the first direction. The second heating member 54a is arranged on one side of the heat source 51 in the machine base longitudinal direction. The second heating member 54 a is arranged so as to contact the heat source 51 . Also, the second heating member 54a is arranged so as to be in contact with the first heating member 53a. In a cross section orthogonal to the first direction, the second heating member 54a is arranged so as to surround the heat source 51 together with the second heating member 54b. The second heating member 54a is arranged, for example, between the heat source 51 and the first heating member 53a in the machine base longitudinal direction. More details of the arrangement of the second heating member 54a will be described later.

The second heating member 54a forms, for example, an inverted U-shaped slit 56 (slit 56a) together with the first heating member 53a. The slit 56a is open on the other side in the height direction. A contact block 55a is accommodated in the slit 56a. The slit 56a functions as a housing space for housing the contact block 55a, and also functions as a yarn traveling space Sa in which the yarn Ya travels. In other words, in this embodiment, the second heating member 54a forms the yarn running space Sa together with the first heating member 53a.

The contact block 55a is, for example, an elongated member made of SUS. The contact block 55a extends at least in the first direction. The contact block 55a is machined, for example. The contact block 55a is arranged in a yarn traveling space S (yarn traveling space Sa) in which the yarn Ya travels. The contact block 55a has a contact surface 57 (contact surface 57a) facing at least the other side in the height direction with which the yarn Ya contacts. In other words, the first heating member 53a and the second heating member 54a are arranged so as not to contact the running yarn Ya (that is, so as to be separated from the running yarn Ya) (see FIG. 4). The contact surface 57a extends at least in the first direction (see FIG. 3(d)). The contact surface 57a is, for example, gently curved in a substantially U-shape in a cross section orthogonal to the machine base longitudinal direction (see FIG. 3(d)). The contact block 55a is fitted into the slit 56a. That is, the contact block 55a is in contact with, for example, at least one of the first heating member 53a and the second heating member 54a. The contact block 55a is preferably in contact with at least the second heating member 54a. More strictly, the contact block 55a is shorter than the slit 56a by 0.1 mm to 0.5 mm in the machine base longitudinal direction. Therefore, a slight gap can be formed between the contact block 55a and the first heating member 53a or the second heating member 54a in the machine base longitudinal direction. Most preferably, the contact block 55a is in contact with the second heating member 54a over its entire length in the first direction. The contact block 55a is heated by heat conducted through the first heating member 53a and the second heating member 54a.

Also, a member for heating the yarn Yb will be described. The first heating member 53b is made of the first material, like the first heating member 53a. The first heating member 53b is arranged on the other side of the heat source 51 in the machine base longitudinal direction. The first heating member 53b is arranged apart from the heat source 51, for example. The second heating member 54b is made of the second material, like the second heating member 54a. The second heating member 54b is arranged on the other side of the heat source 51 in the machine base longitudinal direction. The second heating member 54 b is arranged so as to contact the heat source 51 . Also, the second heating member 54b is arranged so as to be in contact with the first heating member 53b. The second heating member 54b, together with the second heating member 54a, is arranged, for example, so as to be sandwiched between the first heating members 53a and 53b in the machine base longitudinal direction. The second heating member 54b forms, for example, a slit 56b similar to the slit 56a together with the first heating member 53b. A contact block 55b is accommodated in the slit 56b. The slit 56b functions as a housing space for the contact block 55b, and also functions as a yarn running space Sb in which the yarn Yb runs. The contact block 55b is, for example, an elongated member made of SUS. The contact block 55b is machined in the same manner as the contact block 55a. The contact block 55b has a contact surface 57b for contacting the yarn Yb, similar to the contact surface 57a. In other words, the first heating member 53b and the second heating member 54b are arranged so as not to come into contact with the running yarn Yb (that is, so as to be separated from the running yarn Yb) (see FIG. 4). The contact block 55b is fitted into the slit 56b. That is, the contact block 55b is in contact with at least one of the first heating member 53b and the second heating member 54b.

(Details of the second heating member)
Next, the details of the second heating member 54 (here, the second heating member 54a as a representative) will be described with reference to FIGS. 3(b) and 4. FIG. The second heating member 54a is arranged, for example, so as to be sandwiched between the heat source 51 and the yarn running space Sa in a cross section perpendicular to the first direction. "Between the heat source 51 and the yarn running space Sa" is defined, for example, as follows. That is, in a predetermined cross section orthogonal to the first direction (see, for example, FIG. 4), the contact surface 57a on the most one side in the height direction (that is, in the cross section shown in FIG. 4, the entrance of the slit 56a in the height direction A plurality of virtual line segments can be drawn so as to connect the point Pa farthest from the heat source 51 and the outer surface 51s of the heat source 51 (for example, line segments L1, L2, L3, etc.). When at least one of these line segments passes through the second heating member 54a, it is defined as "the second heating member 54a is arranged between the heat source 51 and the yarn running space Sa". “Between the heat source 51 and the yarn running space Sb” can be similarly defined.

The second heating member 54 is preferably in contact with the heat source 51, the first heating member 53 and the contact block 55 as in this embodiment. Also, the ratio of the heat capacity of the second heating member 54 to the heat capacity of the first heating member 53 is preferably 20% or more and 40% or less, for example.

Details of the second material forming the second heating member 54 will be described. As described above, the volumetric specific heat of the second material is less than the volumetric specific heat of the first material. More specifically, a C/C composite (carbon fiber reinforced carbon composite material) is suitable as the second material. A C/C composite is a composite material of carbon fiber and graphite. As carbon fibers, for example, known pitch-based carbon fibers are used. As shown in FIG. 5, in this embodiment, the volume specific heat of brass used as the first material is 3.35 J/(cm ³ ·K) at 20° C., for example. On the other hand, the volume specific heat of the C/C composite used as the second material is 1.12 J/(cm ³ ·K) at 20° C., for example. Therefore, the temperature of the second heating member 54 can be raised more quickly than the temperature of the first heating member 53 . That is, when the temperature of the yarn running space S or the like drops due to disturbance, the temperature of the yarn running space S or the like can be quickly raised via the second heating member 54 . Therefore, even if the temperature of the yarn running space S or the like drops, the temperature of the yarn running space S or the like can be quickly increased.

Moreover, in the present embodiment, the C/C composite used as the second material has orientation. More specifically, many carbon fibers are oriented in a predetermined X direction. The X direction is, for example, the first direction in this embodiment. Thereby, the thermal conductivity of the second material has anisotropy. As shown in FIG. 5, the thermal conductivity of the C/C composite in the first direction (X direction) is 180 W/(m·K) at 20° C., for example. On the other hand, the thermal conductivity of the C/C composite in the Y direction perpendicular to the X direction (for example, the machine base longitudinal direction, height direction, etc.) is, for example, 80 W / (m K) at 20 ° C., and the heat in the X direction Lower than conductivity. In this embodiment, at least the thermal conductivity of the C/C composite in the first direction is higher than the thermal conductivity of brass (for example, 60 W/(m·K) at 20° C.). The heating temperature in the first direction can be made uniform by the second heating member 54 made of such a second material.

Furthermore, in the present embodiment, the thermal conductivity of the C/C composite (80 W/(m K) described above) is the same as the thermal conductivity of brass (60 W/(m K) described above) in any direction orthogonal to the first direction. (m·K)). In other words: In the cross-sectional view (see FIG. 4) orthogonal to the first direction, for example, the direction in which the line segment L3 connecting the point Pa and the outer surface 51s of the heat source 51 at the shortest distance extends is defined as the second direction. The line segment L3 corresponds to the "predetermined imaginary straight line extending from the heat source to the yarn traveling space" of the present invention. With such a configuration, heat can be quickly transferred from the heat source 51 to the yarn running space Sa and the like. Therefore, the temperature of the yarn running space Sa and the like can be quickly raised. Similarly, the temperature of the yarn running space Sb and the like can be raised quickly.

Note that the first heating device 13 of the present embodiment heats the running yarn Y while it is in contact with the contact surface 57 in a state where the heating temperature is set to a predetermined temperature of 230° C. or higher and 350° C. or lower, for example. , is particularly preferred. Within such a temperature range, the heating efficiency of the yarn Y can be improved compared to a conventional heating device (not shown). Of course, the heating temperature of the first heating device 13 may be set to a temperature lower than 230°C, or may be set to a temperature higher than 350°C.

As described above, by using a material having a relatively high volumetric specific heat as the first material forming the first heating member 53, it is possible to suppress the temperature drop of the heating section 52 due to disturbance to some extent. Furthermore, in this embodiment, the second heating member 54 having a low volumetric specific heat can be heated more quickly than the first heating member 53 . As a result, the yarn traveling space S and the like can be quickly heated via the second heating member 54 arranged between the heat source 51 and the yarn traveling space S. Therefore, such rapid heating can suppress a temperature drop in the yarn traveling space S and the like due to disturbance. In addition, even if the temperature of the yarn running space S or the like drops due to disturbance, the temperature of the yarn running space S or the like can be quickly raised.

Also, the second heating member 54 is in contact with the heat source 51 . Thereby, the heat generated by the heat source 51 can be quickly transferred to the second heating member 54 . Therefore, the temperature of the second heating member 54 can be effectively raised.

Further, the second heating member 54 forms a yarn running space S together with the first heating member 53 . Therefore, the second heating member 54 can effectively raise the temperature of the yarn running space S and the like.

Also, the second heating member 54 is in contact with the first heating member 53 . Therefore, the first heating member 53 can be quickly heated via the second heating member 54 . Further, in this case, for example, compared to the case where a heat source (not shown) for heating the first heating member 53 is provided separately from the heat source 51 and the second heating member 54 is arranged separately from the first heating member 53, manufacturing Cost increase can be suppressed.

Also, the ratio of the heat capacity of the second heating member 54 to the heat capacity of the first heating member 53 is 20% or more and 40% or less. Thus, the heat capacity of the second heating member 54 is neither too large nor too small with respect to the heat capacity of the first heating member 53 . Therefore, the heating part 52 can be somewhat resistant to disturbance, and the temperature of the yarn traveling space S and the like can be quickly raised.

Also, the second material forming the second heating member 54 includes a fibrous material. Thereby, the thermal conductivity of the second material can be anisotropic. Therefore, heat can be transferred very quickly, especially in the direction in which it is desired to transfer heat.

Further, the fiber material is carbon fiber. Carbon fiber is a lightweight material with high thermal conductivity. Therefore, heat can be transferred very quickly in the desired direction of heat transfer. Moreover, the weight of the first heating device 13 can be reduced.

Also, the carbon fiber is a pitch-based fiber. Pitch-based carbon fibers and PAN-based carbon fibers are generally known as carbon fibers. In general, pitch-based carbon fibers have higher thermal conductivity than PAN-based carbon fibers. Therefore, by using the pitch-based carbon fiber as the carbon fiber, the thermal conductivity of the second material can be further increased.

Moreover, by using a composite material of carbon fiber and graphite as the second material, the thermal conductivity of the second material can be further increased.

Also, the second material has higher thermal conductivity in the first direction than the first material. Thereby, heat can be quickly transferred in the first direction through the second heating member 54 . Therefore, temperature variations in the yarn running space S and the like in the first direction can be suppressed.

Also, the second material has higher thermal conductivity in the second direction than the first material. As a result, heat can be rapidly transferred from the heat source 51 to the yarn running space S and the like via the second heating member 54 . Therefore, the temperature of the yarn traveling space S and the like can be quickly raised.

The heating section 52 also has a contact block 55 . In the configuration in which the contact block 55 is provided as in this embodiment, the temperature of the contact block 55 can be effectively raised by rapidly raising the temperature of the second heating member 54 .

Also, the contact block 55 is in contact with the second heating member 54 . Therefore, heat conduction between the contact block 55 and the second heating member 54 whose temperature is rapidly increased can effectively raise the temperature of the contact block 55 .

Further, by performing the false twisting in the false twisting machine 1 having the first heating device 13, it is possible to suppress fluctuations in the heating temperature required for processing the yarn Y due to disturbance. Therefore, fluctuations in the quality of the yarn Y processed by the false twisting machine 1 can be suppressed.

Next, a modification in which the above embodiment is modified will be described. However, components having the same configurations as those of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

(1) In the above embodiment, the carbon fibers contained in the C/C composite, which is the second material, are oriented in the first direction. However, it is not limited to this. For example, the carbon fibers may be oriented in the second direction in the second heating member 54a. Further, in the second heating member 54b, the carbon fibers may be oriented in the direction from the heat source 51 toward the yarn running space Sb or the like. In this case, the heat can be transferred very quickly from the heat source 51 to the yarn traveling space S and the like.

(2) In the above embodiments, the carbon fibers contained in the second material are pitch-based fibers. However, it is not limited to this. Carbon fibers may be, for example, known PAN-based carbon fibers.

(3) In the above-described embodiments, the second material is a C/C composite (composite material of carbon fiber and graphite). However, it is not limited to this. The second material may be, for example, CFRP (carbon fiber reinforced plastic), which is a composite material of carbon fiber and resin (for example, epoxy resin). Since CFRP is cheaper than C/C composite, the use of CFRP as the second material can suppress an increase in manufacturing cost of the first heating device 13 .

(4) In the above embodiments, the second material contains carbon fiber as the fiber material. However, it is not limited to this. Materials other than carbon fiber may be used as the fiber material.

(5) In the above-described embodiments, the carbon fibers contained in the C/C composite are oriented in the predetermined X direction. However, it is not limited to this. The carbon fibers do not have to be oriented in a specific direction (that is, they may be oriented randomly).

(6) In the above embodiments, the thermal conductivity of the second material is higher than that of the first material in both the first direction and the second direction. However, it is not limited to this. The thermal conductivity of the second material may, for example, be higher than the thermal conductivity of the first material in only one of the first direction and the second direction. Alternatively, the thermal conductivity of the second material may be less than or equal to that of the first material. The second material may only have the property of having a lower volumetric specific heat than the first material. As an example, the first heating member 53 may be made of aluminum, for example. As shown in FIG. 6A, the volumetric specific heat of aluminum (first material) is 2.43 J/(cm ³ ·K) at 20°C. Also in this case, the volumetric specific heat of the C/C composite (second material) is smaller than that of aluminum. On the other hand, the thermal conductivity of aluminum (first material) is 204 W/(m·K) at 20° C., which is higher than that of C/C composite (second material) in any direction.

(7) Combinations of the first material and the second material are not limited to those described above. For example, as shown in FIG. 6(b), the first material may be brass and the second material may be aluminum. In this case, the volumetric specific heat of the second material is lower than the volumetric specific heat of the first material, and the thermal conductivity of the second material is higher than the thermal conductivity of the first material. Aluminum is superior in heat resistance to C/C composite. When a material having such excellent heat resistance is applied to the heating portion 52, the heating temperature can be set high. In this case, the first heating device 13 may be, for example, a non-contact heating device (not shown) as described in JP-A-2002-146640. In a non-contact heating device, instead of the contact block 55, a plurality of yarn guides (not shown) are provided spaced apart from each other in the first direction. Each yarn guide is not a member for directly heating the yarn Y, but a member for simply guiding the yarn Y. In the non-contact heating device, the yarn Y is mainly heated by the warmed air in the yarn traveling space S.

(8) In the above-described embodiments, the first heating device 13 is configured to heat two yarns Y; However, it is not limited to this. A first heating device (not shown) configured to heat three or more yarns Y may be provided. Alternatively, for example, as shown in FIG. 7, a first heating device 13A configured to heat one yarn Y may be provided. The heating unit 52A of the first heating device 13A may have a configuration in which, for example, the first heating member 53b and the contact block 55b are simply removed from the heating unit 52 (see FIG. 4, etc.). Alternatively, in the first heating device 13A, a first heating member 61 made of the first material may be provided instead of the second heating member 54b.

(9) In the above embodiments, the second heating member 54 is in contact with the heat source 51 and contact block 55 . However, it is not limited to this. The second heating member 54 may be in contact with only one of the heat source 51 and the contact block 55 , and may be in contact with neither the heat source 51 nor the contact block 55 . In this case, only the first heating member 53 may be provided so as to contact the heat source 51 and/or the contact block 55 . Also, in the above-described embodiments, the second heating member 54 is in contact with the first heating member 53, but the present invention is not limited to this. For example, a heat source (not shown) for heating the first heating member 53 may be provided separately from the heat source 51 and the second heating member 54 may be arranged apart from the first heating member 53 .

Also, for example, only a portion of the contact block 55 in the first direction may be in contact with the second heating member 54 . However, in this case, the heating efficiency of the contact block 55 is low compared to the structure in which the contact block 55 is in contact with the second heating member 54 over the entire length in the first direction.

Alternatively, neither the first heating member 53 nor the second heating member 54 may contact the contact block 55 . However, in this case, the heating efficiency of the contact block 55 is low. Note that the heating efficiency of the contact block 55 is high in the following order. As a first configuration, at least the second heating member 54 is in contact with the contact block 55. In this configuration, the heating efficiency is the highest. As a second configuration, in a configuration in which only the first heating member 53 is in contact with the contact block 55, the heating efficiency is the second highest. As a third configuration, the heating efficiency is the lowest in a configuration in which neither the first heating member 53 nor the second heating member 54 is in contact with the contact block 55 . If two or more of the first to third configurations are unintentionally mixed in the plurality of heating units 52 , the heating efficiency of the contact block 55 may vary among the plurality of heating units 52 . For this reason, it is desirable that the plurality of heating units 52 and the plurality of first heating devices 13 are unified to any one of the first to third configurations as much as possible.

(10) In the above embodiments, the ratio of the heat capacity of the second heating member 54 to the heat capacity of the first heating member 53 is 20% or more and 40% or less. However, it is not limited to this. The ratio may be, for example, less than 20% or greater than 40%.

(11) In the above-described embodiments, the contact surface 57 is curved in a cross section orthogonal to the machine base longitudinal direction. However, it is not limited to this. The contact surface 57 may be, for example, substantially linear in a cross section orthogonal to the machine base longitudinal direction.

(12) In the above embodiments, the first heating device 13 and the first heating device 13A have the contact block 55 . However, it is not limited to this. Instead of the contact block 55, a SUS plate (not shown) that is sheet-metal-processed so as to have an inverted U-shape in a cross section perpendicular to the first direction may be provided as a contact member (for example, Japanese Unexamined Patent Application Publication No. 2002-2002). 194631).

(13) The contact member (the contact block 55 or the SUS plate described above) may be configured to be detachable from the heating section 52 . As a result, the contact member can be temporarily removed from the heating unit 52, so that maintenance efficiency such as cleaning of the contact member can be greatly improved.

(14) In the above embodiments, the slit 56 is formed by both the first heating member 53 and the second heating member 54 . However, it is not limited to this. The slit 56 may be formed by only one of the first heating member 53 and the second heating member 54 . That is, the first heating member 53 may form the entire slit 56 . Alternatively, the second heating member 54 may form the entire slit 56 .

(15) In the above embodiments, the heat source 51 has a sheathed heater. However, it is not limited to this. Instead of the heat source 51, a heat source (not shown) configured to heat the heating unit 52 with a heat medium, for example, may be provided.

(16) The configuration of the first heating device 13 described above may be applied to the second heating device 19 . Moreover, the above-described first heating device 13 is applicable not only to the false twisting machine 1 but also to a known false twisting machine (not shown) having another configuration. For example, the present invention may be applied to a false twisting machine (not shown) described in JP-A-2009-74219. The false twisting machine is configured to be able to combine two yarns to form one yarn. The false twisting machine is configured to be able to wind one plied yarn or two non-plied yarns onto a single cradle. As an example, the present invention may be applied to such a false twisting machine. Alternatively, the first heating device 13 can be applied to a yarn processing machine that processes a yarn (not shown) while it is running, such as a known air processing machine (not shown), in addition to the false twisting machine.

1 False twisting machine (yarn processing machine)
11 first feed roller (yarn feeding device)
13 First heating device (heating device)
15 False twist device (yarn deformation imparting device)
51 heat source 52 heating unit 53 first heating member 54 second heating member 55 contact block (contact member)
S Yarn running space Y Yarn

Claims (15)

a heat source;
a heating unit configured to be heated by the heat source and configured to form a yarn running space extending at least in a predetermined first direction to heat the yarn running in the yarn running space. A heating device for
The heating unit
a first heating member made of a first material and arranged so as not to come into contact with the yarn running in the yarn running space;
The first material is arranged at least between the heat source and the yarn traveling space in a cross section perpendicular to the first direction, and is arranged so as not to contact the yarn traveling in the yarn traveling space. and a second heating member made of a second material having a lower volumetric specific heat than the second heating member. 2. The heating device according to claim 1, wherein said second heating member is in contact with said heat source. 3. The heating device according to claim 1, wherein the second heating member is in contact with the first heating member. 4. The heating device according to claim 1, wherein the ratio of the heat capacity of said second heating member to the heat capacity of said first heating member is 20% or more and 40% or less. The heating device according to any one of claims 1 to 4, wherein the second material includes a fibrous material. 6. The heating device according to claim 5, wherein the fiber material is carbon fiber. 7. The heating device according to claim 6, wherein the carbon fibers are pitch-based fibers. 8. The heating device according to claim 6, wherein said second material is a composite material of said carbon fiber and graphite. 8. The heating device according to claim 6, wherein said second material is a composite material of said carbon fiber and resin. the second heating member is arranged to extend at least in the first direction;
The heating device according to any one of claims 1 to 9, wherein the second material has higher thermal conductivity in at least the first direction than the first material. When a direction in which a predetermined imaginary straight line extending from the heat source toward the yarn traveling space extends in a cross section perpendicular to the first direction is defined as a second direction,
The heating device according to any one of claims 1 to 10, wherein the second material has higher thermal conductivity in at least the second direction than the first material. The heating unit
12. The heating device according to any one of claims 1 to 11, further comprising a contact member that extends at least in the first direction and contacts the thread. 13. The heating device according to claim 12, wherein the contact member is in contact with the second heating member. 14. The heating device according to claim 12, wherein the contact member is detachably attached to the heating unit. a heating device according to any one of claims 1 to 14;
a yarn deformation imparting device that imparts deformation to the yarn;
a yarn feeding device for running the yarn, configured to feed the yarn to the heating device and the yarn deformation imparting device;
A yarn processing machine configured to process the yarn while it is running.

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