WO1996032525A1

WO1996032525A1 - Noncontact heater for wire material

Info

Publication number: WO1996032525A1
Application number: PCT/JP1996/001016
Authority: WO
Inventors: Michito Miyahara; Masahiro Okesaku; Masaharu Shiroyama; Masamitsu Egashira; Shizuki Koga
Original assignee: Nippon Tungsten Co., Ltd.; Hokuriku Seikei Industrial Co., Ltd.
Priority date: 1995-04-14
Filing date: 1996-04-12
Publication date: 1996-10-17
Also published as: KR100212641B1; EP0770720A1; TW438189U

Abstract

A noncontact heater having a case (2) that contains a heating pipe (1) for passing a wire material to be heated and a heat-insulating material layer (3), as shown in the figure. A temperature sensor (7) is disposed in contact with the heating pipe (1) or inside the heating pipe (1). Slits, having a predetermined width or locally widened, are disposed along the entire length of the heating pipe (1), and thus a cover portion of the case opposing slit-like openings of the heating pipe can be opened and closed. Further, in order to restrict vibration and deflexion of the travelling wire material, guides can be inserted into the heating pipe, or the temperature sensor can be fitted to the side surfaces of this guide, and a connection terminal member may be of a split type.

Description

Non-contact type wire heating equipment Technical field

The present invention relates to a device S for heating a linear, rod-like, or thread-like linear material formed of a metal-based material, a glass-based material, a synthetic resin-based material, or a synthetic fiber in a non-contact state. Background art

A false twisting method in which the fibers are heated in a non-contact state, in contrast to a method in which the fibers are heated in a contact manner by a hot plate, is disclosed in Japanese Patent Publication No. 2-67069. In this device, a sheathed heater is fitted into the body with a U-shaped groove, and an arrow blade-shaped guide with a slit is set in this groove so that the thread runs on the bottom of the slit. It was made.

This non-contact type heating device is superior to a device that heats in a state of contact with a hot plate in that the heater length can be shortened without deteriorating the surface condition of the wire to be heated. However, there is a problem in that the energy is large because the sheathed heater indirectly heats the U-grooved body.

The applicant of the present application has disclosed in Japanese Patent Publication No. 4-66963 that in order to increase the thermal efficiency of this non-contact type heating device, a conductive ceramic ceramic tube along the passage of the passing yarn is used. A direct heating type in which a compact is disposed is disclosed.

However, when a temperature sensor consisting of a thermocouple or a resistance thermometer is mounted, the temperature can be accurately detected without variation due to the mounting method of the temperature sensor or subtle differences in the mounting method. It was difficult.

Replacement form (Rule 26) In addition, when the wire material is a conductive material such as a metal-based material, there is a risk of short-circuiting or electric shock due to contact with the inner diameter of the tubular conductive ceramic molded body.

Furthermore, the heating device fi disclosed in Japanese Patent Publication No. 4-66963 has a problem that it lacks versatility when used under heating at or above the melting point of the filament. For example, a heating device with a tubular heating element is installed inside a tube of a heating element in which a filament, which is a material to be heated, and in particular, a thin, non-rigid filament such as fiber is set at a temperature below the melting point. When the temperature is set to a temperature higher than the melting point, ^f , the thread can be pulled out by pulling the yarn by vacuum suction from the opposite side of the tubular heating element (hereinafter referred to as the heating tube). Causes the following problems.

In particular, when the fiber is a synthetic fiber, its melting point is about 250. When the yarn comes into contact with the inner wall of the heating tube heated above its melting point, the yarn is delicate and adheres, making it difficult to thread the thread. For this reason, it is necessary to cool the heating tube below the melting point of the yarn in advance, perform the yarn hooking operation, and then raise the temperature to the set temperature again.

In the case of performing false twisting of fiber, for example, after the heating tube reaches the set temperature and the temperature is maintained until the entire heating device reaches a constant temperature, the fiber is allowed to cool or set below the melting point of the fiber. Threading work such as vacuum suction of the fiber by lowering the temperature takes about 5 minutes / cone, and then the temperature is raised again to the set temperature, and from the point when the temperature reaches the constant temperature state, the product is started. Is obtained.

In this way, the non-contact type heating device equipped with a heating tube consumes extra time for cooling, heating, and reheating until reaching a constant temperature state. In addition, false twisted yarn from the time of threading until reaching the constant temperature state becomes defective.

In addition, if a temperature sensor including a thermocouple is installed outside the heating tube, there is a temperature difference between the outside and inside of the heating tube. There is.

Replacement form (Rule 26) Disclosure of the invention

A main object of the present invention is to solve the above-mentioned drawbacks in a non-contact type heating apparatus having a heating pipe having a passage inside which a wire to be heated travels, and to improve the temperature measurement accuracy. , Improvement in ease of use, operability and versatility. Another object of the present invention is to complete a temperature control means for reducing a large temperature difference inside and outside a pipe in the case of a tubular heating tube.

Another object is to achieve uniform heating temperature in the longitudinal direction when the heat generating portion of the tubular resistance heating element is lengthened.

Another purpose is to extend the life of the heating element itself.

Still another object is to prevent a change in the resistance value of the heating element due to contamination of the inner diameter of the self-heating heater and to establish means for maintaining a heating atmosphere.

According to the present invention, a temperature sensor for detecting a temperature for temperature control is provided at a heating portion of the heating tube at the heating tube itself or at a position where the filament material passes to improve measurement accuracy and control for temperature management. Make sure it is done exactly:

Furthermore, a linear long heating device can be formed by dividing the tubular resistance heating element into a plurality of pieces in the length direction, or by connecting the divided ends with joints made of an insulating material. . For example, the general bending amount of such combustion tube Ya of A 1 ₂ 0 ₃ system commercially available protective tube in (Seo Li tolerance) is 2 for the length - as a three dimensional variation within mm, ceramic The slack of the lock-type pive is an inevitable phenomenon in the manufacturing method. For example, the same warpage occurs in the case of a tubular resistance heating element with a length of 1 m, and since there is a warp of up to 3 mm, the traveling speed tension of the heated object and the type of the heated object Due to vibrations and loosening phenomena, etc., depending on the conditions, the object to be heated cannot go straight and slides in contact with the heater. As a result, good products cannot be obtained. Therefore, by assembling three heaters with a length of 330 mm and the same sled tolerance (3I100) in series, a sled with a total length of 1 m can be reduced to approximately 1/3 of 1/3. Can be made smaller.

Replacement form (Rule 26) By attaching at least one temperature sensor to each of the divided heating tubes, the temperature of each of the divided tubes can be individually controlled, and the temperature over the entire length of the heat / heat apparatus can be controlled more. Can be managed accurately.

For the resistance heating element constituting the heating tube, the specific resistance value is preferably within the range of 1.0 X 10 " ³ Ω-cm to 9Χ10 ³ Ω · cm, more preferably 1 × 10 ³ Ω · cm. . 0 X preferably adjusted to 1 0 one ² Omega · cm from 9 chi range of 1 0 * "Ω · cm. If the specific resistance value is less than 1.0 X 10 ^_3 Ω.cm, the thickness of the tubular resistance heating element may be 0.5 mm or less due to the relationship between the diameter and the length. Manufacturing may become difficult, or even if the applied voltage is as low as about 10 V, a current value of 20 amperes or more may flow, so the lead wire capacity S must be increased. And the like.

Further, in the heating device of the present invention, as the tubular heating element or the tubular resistance heating element, a ceramic material or a conductive ceramic that generates at least any one of near infrared rays and far infrared rays. Use a base material. Furthermore, an insulating tubular ceramic is inserted into the inside diameter of a tubular resistance heating element, or an insulation film formed on the inside diameter of the resistance heating element is used as a tubular heating tube. it can. Alternatively, it is also possible to use a heating tube in which a conductive compressive coating capable of generating heat is formed on the outer peripheral surface of a tubular insulating ceramic material. Further, a sheet on which a conductive pattern is printed or a laminate with another sheet may be formed into a circular tube and used as a heating tube. However, the specific resistance value of the heating tube on which these conductive films are formed is preferably adjusted within the above-mentioned range by calculating from the total resistance value and the cross-sectional area of the heating tube. Alternatively, instead of a ceramic or conductive ceramic material, a tubular heating element in which a coating that generates at least far-infrared rays among infrared rays is formed on the inner surface of a metal pipe may be used. it can.

Next, when the heating device of the present invention is used at a temperature equal to or higher than the melting point of the wire, a slit-shaped opening for introducing the wire from the side of the heating tube over the entire length of the installed heating tube. Ri due to providing a, _c operability is improved

Replacement paper (M26j W09632S25

5 When the wire to be heated is introduced into the heating tube during the heat treatment, the slit-shaped opening was used to stretch the entire length of the heating tube outside the heating tube. The wire can be easily introduced into the heating tube by sliding the wire into the heating tube along the guide.

Furthermore, as a connecting terminal member for the heating tube, the structure is such that the terminal portion of the heating tube can be inserted from both sides and has an opening corresponding to the slit. The versatility can be improved by incorporating a guide for suppressing the occurrence in the heating tube as necessary. Furthermore, by attaching a temperature sensor to the side surface of this guide, or by attaching a temperature sensor in direct contact with the heat-generating portion of the heating tube, the accuracy of the temperature control can be improved. BRIEF DESCRIPTION OF THE FIGURES

1 to 4 show an embodiment of a method of directly attaching a temperature sensor to a heating tube as a first embodiment of the present invention.

FIG. 5 shows another embodiment of the present invention, in which an insulating protective tube 8 is inserted into the inner surface of the heating tube 1.

FIG. 6 and FIG. 7 show an embodiment in which divided heating tubes are connected to increase the length of a heated portion.

FIGS. 8 and 9 show an example of the present invention in which an atmospheric gas can be introduced.

Figures 10 to 15 show heating tubes that form a linear slit extending from the outer diameter to the inner diameter surface in the longitudinal direction so that the heated wire can be inserted from the side of the resistance heating element. Here is an example.

FIGS. 16 to 18 show an embodiment of a heating device in which two heating tubes each having a slit are mounted in parallel.

FIGS. 19 to 23 show embodiments of the guide to be attached to the slit.

Replacement form (Rule 26) 24 to 27 show a state in which a guide is attached to the slit and an example of the structure of the slit.

FIGS. 28 to 30 show connection terminal members to be attached to metallized terminal portions formed at the front and rear ends of the heating tube 1. BEST MODE FOR CARRYING OUT THE INVENTION

Example 1

FIG. 1 shows an example in which a temperature sensor is attached to a heating tube in the non-contact heating device according to the present invention. In FIG. 1, reference numeral 1 denotes a heating tube made of a resistance heating element material having a resistance value of 9 × 10 ^_3 to 9 × 10 ³ ohm * cm arranged in a heater case 2. The inner surface of the heating tube 1 exposes the resistance heating element itself to serve as a passage for a heated filament. Examples of conductive ceramic materials include conductive oxide or non-oxide ceramic materials, or insulating ceramics and carbides, nitrides, and oxides belonging to IVa, Va, and VIa groups. boride or carbonitride compound, carbon boride,窒硼product or carbonitride窒硼halides and compounds in which these substances have contains oxygen, more M o S i metal silicide such as ₂ Wakashi Ku is the metal-based material or the like Use a composite material that combines conductive components and the like. Further, a heating tube in which a conductive layer that generates resistance heat is formed on the middle layer or the outer peripheral surface of the thick insulating ceramic material can be used. Further, a silicon carbide-based resistance heating element can be preferably used. The heating device of the present invention incorporating a tubular heating element or a heating element that generates at least far infrared rays out of infrared rays or infrared rays can be applied to many types of filaments, particularly synthetic resins, synthetic fibers, and the like. For natural fibers, woven fabrics, and other high-molecular-weight materials, these objects absorb far-infrared rays and self-heat, making it possible to perform heat treatment in a lower temperature range than conventional devices. As a result, energy-saving textile products with a better texture can be obtained. The thermal expansion coefficient of the resistance heating element material or the heating tube is 9.5 X 10 " ⁶ / CC or less. The smaller the force, the better ⁵ ', and the temperature of the furnace case is 50 ° C. The heating element may be heated to the extent that the resistance heating element

Replacement form (Rule 26) Alternatively, it is better to select or adjust an appropriate material so that excessive tensile stress or compressive stress is not applied to the heating tube or the heating tube into which the ceramic tube is inserted. Reference numeral 3 denotes a heat insulating material layer provided over the entire length (heat generating portion) of the outer peripheral surface of the heating tube 1, whereby the heat retention and the uniform heat state in the heating tube 1 can be maintained. Reference numeral 4 denotes a resistance heating element itself or a terminal portion made of a good conductor having a lower resistance value than the resistance heating section. The terminal portion 4 is preferably formed by metalizing the outer peripheral surface of the end portion. The terminal portion 4 is exposed to the outside of the heat insulating material 3 and is provided with an air cooling mechanism through a ventilation hole 5 provided in the heater case 2. This prevents the temperature rise, prevents deterioration of the metallized layer due to high temperature, and prevents cracks and peeling phenomena caused by the difference in the coefficient of thermal expansion between the matrix and the metallized layer at the time of heating and cooling. When the heating device is used while the metallized portion of the heating tube 1 and the connection terminal members are wrapped in the heat insulating material 3, the high temperature becomes 500 °. When set to C, the service life is about 3 to 12 months due to oxidation and cracking or peeling phenomena. Does not occur at all. A ceramic guide 6 is fitted and attached to the end face of the metalized terminal portion 4 at the end of the heating tube 1. The guide β is made of a material having abrasion resistance, heat resistance, heat insulation, and insulation, which has reduced inner surface roughness and improved slipperiness even though the inner diameter is small. Even if the wire to be heated vibrates or slightly loosens, the wire has a function of preventing the surface of the wire from being damaged. And a flange 63 for locking to the outer surface of the heater case 2. Reference numeral 7 denotes a temperature sensor mounting portion which is mounted in contact with the outer surface at substantially the center of the heating tube 1. The mounting position can be adjusted to an optimal position according to the temperature distribution inside the heating tube.

2 and 3 show a first mounting state of the temperature sensor mounting portion 7. FIG. FIG. 2 shows a state of the heating tube 1 viewed from a cross section, and FIG. 3 shows a state of the mounting tube viewed from a side. In the figure, 7 1 is for attaching thermocouple protection tube 7 2

Replacement form (Rule 26) An attachment, having the shape of a saddle having a projection 73 at the top. This saddle-shaped fixture 71 is sandwiched around the heating tube 1 and fixed. The saddle-shaped mounting jig 71 has many parts where the jig itself is in surface contact with the outer surface of the heating material, has a large heat transfer contact area with the sensor, and detects a more accurate surface temperature. it can. Also, by wrapping the tip of the temperature sensor protective tube 72 with a ceramic string that is heat-resistant and heat-insulating and heat-insulating without gaps, the inside is heated and maintained at almost the outer surface temperature of the heater. Accurate temperature can be detected. FIG. 4 shows another embodiment of the mounting method of the temperature sensor mounting portion 7, in which a blind hole 74 or a through hole is provided in the tube wall of the heating tube or the heating tube 1, and the thermocouple protection tube 7 is provided. Mount 2 directly. As a result, in the case of a blind hole, the sensor power is built into the thick portion of the heating tube or the heating tube, and a temperature intermediate between the outer surface temperature and the inner temperature of the heating tube can be detected. In addition, when the tip of the sensor is inserted up to the inner diameter surface into a hole formed by penetrating the thickness of the heating tube, a value substantially corresponding to the internal temperature of the heating tube can be detected.

Example 2

FIG. 5 shows a second embodiment of the present invention in which an insulated protective tube 8 is inserted into the inner surface of the heating tube 1 to form a heating tube. The protective tube 8 is a thin-walled, for example, alumina-based insulating material, and is inserted so as to be exchangeable as needed. The protective tube 8 made of the insulative ceramic extends from the heat insulating partition 3, which is insulated from the heat insulating material 3 and the heating tube 1, from the metalized terminal portion 4 to the outside of the heater case 2. It protrudes and also serves as a tubular guide. By inserting the insulative ceramic tube 8, deterioration and consumption of the heating element due to contaminants generated from the object to be processed on the inner surface of the heating tube 1 can be reduced. If this contaminant is, for example, an organic substance, it can be burned and removed by increasing the set temperature of the heating device. Effects such as smaller values appear. In such a case, the deterioration and consumption of the heating element can be reduced by inserting the insulating ceramic tube 8.

Replacement form (Rule 26) The change in resistance value due to contamination of the inner surface of the heating tube can also be prevented by forming an insulative coating on the inner diameter surface to form the heating tube.

Example 3

FIG. 6 shows an embodiment in which the divided heating tubes are connected to form a heating portion having a length of about 500 to 200 mm in a straight line.

In the figure, the heating tube 1 is divided into two or more, a heating main tube portion 101 at a center and heating tube portions 102, 103 at both ends. Metalized terminal portions 4 are formed at both ends of each of the divided heating tubes 101, 102, and 103. A tubular guide made of a heat-resistant and abrasion-resistant insulating material for introducing a heated striated body is connected to one end of the tubular resistance heating element having the metallized terminal portion, and the wire into the heating conduit is connected. The introduction of the strip material can be performed smoothly, the damage to the heating tube and the end can be reduced, and the metallized terminal and the tubular guide can be exposed outside the heat insulating material. By allowing air cooling, deterioration of the metallized portion can be prevented. Further, it is preferable that the terminal portions 4 are connected via a connecting member 9. Each of the divided heating tubes is provided with the temperature sensor mounting portion 7 described in the first embodiment, whereby an arbitrary temperature gradient can be formed in the heating area of each heating tube.

FIG. 7 is a view showing a connected state of each divided pipe. The connecting member 9 is made of an electrically insulating ceramic material, and has the same inner diameter as the diameter of the end of the heating element or the heating tube or the inner diameter of the tubular guide on which the metalized terminal portion 4 is formed. The connecting member 9 has a ring-shaped outer peripheral surface portion 92. The connecting member 9 is attached between the terminal portions 4 of the divided heating tubes to connect the respective divided heating tubes. Usually, the heating pipe having a passage for the wire to be heated inside is made of a ceramic-based resistance heating element itself, or an insulated ceramic pipe or an inner diameter surface inserted inside the resistance heating element. Is made of a tubular resistance heating element made of an insulating material, it is very difficult to form it straight without bending, and the larger the length, the higher the manufacturing cost. Becomes In addition, the temperature in the longitudinal direction of the tubular heating element manufactured by the one piece

Replacement form (Rule 26) The temperature near the center is high, and the temperature at both ends of the heater is low due to the large heat loss, resulting in a mountain-shaped temperature distribution. However, by using a divided heater in which two or more heaters are assembled in series, and by installing a temperature sensor in the optimal position of each divided pipe, only one heater can be used. It is possible to provide a temperature gradient that is more favorable than it is or to provide a device with a longer temperature distribution in the soaking zone.

Example 4

Fig. 8 shows a heating device suitable for applying water vapor, a gas for forming a surface layer, or a non-oxidizing or reducing gas for preventing surface oxidation to the object to be heated traveling in the heating tube. 3 shows another embodiment.

In the figure, reference numerals 10 and 11 are provided near the inlet 12 and the outlet 13 of the wire to be heated of the heating tube 1 inserted into the inner diameter of the resistance heating element or the heating element. In addition, a gas inlet pipe and a discharge pipe for discharging a part of the introduced gas are shown, each of which has a metalized terminal portion 4 near each end. The discharge pipe 11 for the introduced gas does not take the form shown in the figure, but is formed by metallizing the discharge port 13 to form a terminal portion, and the end of this terminal portion is used as a gas discharge port. You can also. The crossing angle α of the gas introduction pipe 10 with respect to the heating pipe 1 is 90. In conjunction with heating tube 1, or an appropriate coupling means in an integral structure so on than, against the _c heating tube 1 introduced gas is in earthenware pots by flow smoothly, from the introduction pipe 1 0 Most of the introduced gas flows through the heating zone in the heating tube 1 heated to a predetermined temperature in the direction of the arrow, forms a heating atmosphere suitable for the wire to be heated, and then discharges the gas 1 1 Is discharged from A part of the gas introduced from the inlet pipe 10 may flow in the direction of the inlet of the wire to be heated. Is released from □ 13. Therefore, when attaching the tubular guides to the inlet 12 and outlet 13, the inner diameter should be as small as possible.

Example 5

Replacement (Rule 26) FIG. 9 shows that, as shown in FIG. 8, instead of the gas introduction pipe 10 branched from the heating pipe 1, the gas introduction member 14 Is shown in the figure. In this case, the gas introduction member 14 is formed also as a guide, and is provided with an inlet 15 for the material to be heated and a gas inlet 16.

As described above, by introducing steam and various gases into the inside of the heating tube, various effects can be obtained when the object to be processed is heated. For example, in the case of a fiber material, when heating not only synthetic fibers but also animal and plant filaments inside the tubular resistance heating element, water vapor is supplied into the heating tube, so that the action of temperature alone is added to the action of temperature alone. Therefore, the texture at the time of stretchability and false twisting / ゃ pressurizing can be improved. In addition, when used for heat treatment of metal wires, etc., power consumption can be reduced by introducing non-oxidizing gas or reducing gas. : Excellent wire can be obtained with a small amount of gas consumption.

Note that the power consumption of the heating device of the present invention was as follows: in the configuration shown in FIG. 1 of the embodiment, the inner diameter of the resistance heating element was 100 mm, the length was 500 mm, and the thickness of the heat insulating material was 70 mm. 500 in mm. When the temperature was maintained at C, the result was 70 W / H, which was very energy saving.

Example 6

In this embodiment, an example of a heating tube in which a linear slit penetrating from the outer diameter to the inner diameter surface in the longitudinal direction is formed, and the wire to be heated is inserted from the side surface of the tubular resistance heating element. Show.

FIG. 10 shows the basic structure of the heating tube 1, and FIG. 11 shows a cross section taken along line AA of FIG. In the figure, reference numeral 4 denotes a terminal portion formed by metalization at both ends. A slit-like opening 17 is formed on one side surface of the heating tube 1 over its entire length, and a passage 18 through which a linear material travels is formed therein.

^ Replacement form (Rule 26) FIGS. 13 and 13 showing cross sections taken along the line B-B of FIGS. 12 and 12 show the inner surface of the heating tube 1 composed of the tubular resistance heating element shown in FIGS. 10 and 11 made of an insulating material. An example of a heating tube provided with a coating or a refractory tube 8 is shown.

FIG. 14 and FIG. 15 showing a cross section taken along the line C-C in FIG. 14 show a slit-like opening 17 formed in a straight tubular heating tube 1 and terminal portions 4 near both ends. Are connected to form a gate-shaped structure.

Figure 16 shows the non-contact type wire heating device with two heating tubes 1 shown in Figs. 10 and 11 arranged in parallel in a heater case 2 and the heating tube slit. FIG. FIG. 17 shows a state in which the lid is attached to FIG. 16 as viewed from the line DD.

In Figs. 16 and 17, the heating device consists of one or more heating tubes 1 arranged in parallel in a heater case 2 with an openable lid 21 provided on the lower surface as necessary. It has the following structure. In some cases, the heater fi may be installed so that the slit 17 of the heating tube 1 is oriented upward or downward in the horizontal direction. Alternatively, it can be mounted in an inclined direction. The slit-shaped openings 17 of the respective heating tubes 1 are both arranged so as to face the opening direction of the lid 21 of the heater case 2. The lid 21 has a trapezoidal shape, and the lid 21 is downwardly slid by a lid closing / closing slide plate 20 as shown by a dotted arrow so that the lower surface of the heater case 2 is closed. Then, the wire passages in the heating tubes 1 and the slit-like openings 17 of the respective heating tubes 1 and the openings on the lower surface of the heater case 2 are opened outward. In a state

The lid 21 of the heater case 2 may be of any other form besides this slide type.

Fig. 18 shows the lower case of the heater 1 case 2 divided into 2 1 1 and 2 1 2 and rotating around hinges 2 1 3 and 2 1 provided on the side of the heater 1 case 2. A lid structure can be used. Also, open the entire lid and open it,

Replacement form (Rule 26) Furthermore, a structure in which the entire lid is opened in the left-right direction by separating the lid from the slit-shaped opening may be employed.

In this manner, by opening the lid 21 or 21 1 and 21 or the entire lid, the wire passage 18 in the heating pipe 1 is heated through the slit-shaped opening 17. Since it is in a state facing the opening on the lower surface of the heater case 2, it is possible to slide the linear material into the heating pipe along the path shown by the dashed line in Fig. 17 and introduce the threading work. Can be completed in a short time.

In order to introduce this linear material into the heating tube and set it, although not shown in Figs. 16 to 18, the linear material introduction guide set before and after in the longitudinal direction of the heater case It is convenient to slide along the opening path with the lid opened as shown by the dashed line in FIG. In addition, the guide for guiding the linear material from the slit-shaped opening to the inside of the heating pipe is provided when the linear material travels inside the heating pipe with the slit, such as vibration, runout, slack, or the like. In the case of a fibrous material, it has a function of preventing the filament material from coming into contact with the inner surface of the heating tube due to a balloon phenomenon or the like.

The results of heating tests with the temperature maintaining power and synthetic fibers in a non-contact state using the devices shown in Figs. 16 and 17 are shown below.

(1) Temperature holding power of wire heating device

a. Specifications of the device of the present invention

· Dimensions of heating tube (resistance heating element)

Outer diameter X inner diameter X length = 95 l 5 x 95 9 x 500 mm (heating section length 450 mm)

. Dimensions of heater case filled with insulation

Width x height x length = 1 26 x l 26 x 580 mm (insulation material length 450 mm)

b. Test conditions

• Applied voltage = 200 V

'' Equipment installation direction = vertical installation

c. Equipment performance when temperature changes

Replacement form (Rule 26) Device type Set temperature Heating tube internal temperature Temperature holding power Conventional commercial equipment 250. C 150W Japanese Patent Application No. 7-89799 400. C 410 ° C 39W

Device of the present invention 250 ° C 250 ° C 22W

Apparatus of the present invention 400 ° C 401 ° C 40W Note) Conventional commercial equipment is a device with a heating section length of 2000 mm.

(2) Result of heating test of synthetic fiber (Nylon)

Table 2

As shown in the above test results, the apparatus of the present invention has no temperature difference between the inside and outside of the heating tube, allows precise temperature control, and has a shorter heating tube length than conventional commercial equipment. Despite the fact that it has the same or better performance, the holding power at the set temperature needs to be extremely small, and the heat-treated yarn has a glossy surface without impairing the intrinsic properties such as the inherent strength of the fiber. But it was very good.

Example 7

This embodiment shows an example in which a guide for introducing a filament material to be heated into a heating tube is incorporated in the heating tube.

FIG. 19 to FIG. 21 show a first example of the guide 22. FIG. 19 shows a view from above, FIG. 20 shows a view from the side, and FIG. 21 shows a front view. This Guy Replacement Form (Rule 261) The guide 22 has a body portion 21 located inside the heating tube and a guide blade portion 22 having a tapered or rounded tip at an end located outward from the slit opening of the heating tube. 2, and a deep groove 2 23 is formed from the tip of the guide blade portion 222 to the body portion 221. The guide 22 is attached by inserting it from the end face of the heating tube in which the slit is formed, and the width of the guide blade 22 is larger than the slit width of the heating tube. It has a structure in which the width of the body part 22 1 is larger than the slit width of the heating tube. Reference numeral 2 2 3 denotes a guide groove formed from the guide blade portion 2 2 2 for introducing the wire and a groove through which the wire runs. Reference numeral 224 denotes a mounting groove formed on a side surface of the guide 22 for mounting a temperature sensor (hereinafter, including a thermocouple). As a result, the guide 22 functions as a guide for introducing the wire into the heating tube, a guide for attaching the temperature sensor to the heating tube, and a It combines the functions of the traveling guide and the three functions.

Example 8

FIG. 22 and FIG. 23 show other examples of the guide 22. In each case, the temperature sensor mounting groove 2 2 4 on the side surface is formed linearly from the guide blade section 2 2 2 to the body section 2 2 1, eliminating the disadvantage of breaking in the extension direction of the deep groove section 2 2 3 effective. FIG. 23 shows a structure in which the side R portion of the body portion 221 is reinforced.

FIGS. 24 and 25 show a state in which the guide 22 is inserted into the heating tube 1 and the temperature sensor 23 is mounted in the temperature sensor mounting groove 22 4 of the guide 22. A diagram as viewed from the end face direction of the heating tube 1 and a diagram as viewed from the slit direction of the heating tube are shown, respectively. The temperature sensor 23 is mounted in the mounting groove 2 24 of the guide 22, and furthermore, reaches the inside of the heating tube 1, so that the temperature inside the heating tube 1 can be accurately detected. In addition, the guide 22 has the temperature sensor 13 as a stopper, which is located outside the opening 17 1 of the slit opening 17 formed by the upper cut. Guide 2 which does not move and is located inside heating tube 1 Replacement paper (Rule 26) The torso part 22 1 is not dropped because it is larger than the width of the slit opening 17. In addition, since the temperature sensor 23 is mounted inside the heating tube 1 using the guide 22, the heating temperature itself of the filament can be measured.

If the guide 22 is to be installed in places where it is not necessary to attach the temperature sensor 23, a heat-resistant pin can be attached instead of the temperature sensor 23 to prevent the guide from shifting. can do. Also, when setting the guide 22 to a position where it is not necessary to incorporate the temperature sensor, omit the upper surface force groove, and as shown in Figs. An enlarged portion 17 1 is formed locally in the tongue opening 17, and a detent jig such as a pin is attached to the enlarged portion 17 1 and the groove on the side surface of the guide 22. Thus, the guide can be prevented from shifting (moving) in the vertical direction or the front-back direction.

Here, due to the formation of the slit-like openings 17 and the manufacture and mounting of the guides 22 and the complexity of the heater case, generally, the horizontal insertion method of the linear material is the manufacturing method of the heating device. Costs are higher. Therefore, the slit opening can be increased by increasing the inner diameter of the heating tube rather than the amplitude of the filament material, particularly the fiber balloon phenomenon, and drawing in the filament material with a heat-resistant insulating material inserted into the heating tube. Formation and guide installation can be omitted.

Example 9

FIG. 28 shows a view of the connection terminal member 24 attached to the metallized terminal portion 4 formed at the front and rear ends of the heating tube 1 as viewed from the direction of the slit opening 17 of the heating tube 1. . FIG. 29 shows a view of the heating tube 1 seen from the end face direction. This connecting terminal member 24 is composed of divided members 24 1 and 24 2 having openings corresponding to the slits 17 of the heating tube 1, and is used to introduce the filament material into the heating tube 1. The structure is such that it does not get in the way. In order to attach the connecting terminal member 24 to the terminal portion of the heating tube 1, the respective divided members 24 1 and 24 2 are tightened to the pressing portion 24 3 via the fulcrum portion 24 4. By applying a force, the terminal can be pressed strongly with the terminal part sandwiched from both sides.

Replacement form (Rule 26) The connection terminal member 24 has a wire member 245 made of silver or other conductive paste or a good conductor interposed between the division members 241, 242 and the terminal surface of the resistance heating element. By pressing the pressing portions 243, the structure can be pressed strongly.

In addition, a, b, c, and d in FIG. 30 show modified examples of the connection terminal member 24. As shown in this example, by forming a terminal member that can be sandwiched from both sides of the terminal portion of the heating tube, the terminal portion and the connection terminal member can be strongly tightened. Even if the power is turned on and off more than once, heating and cooling can provide the result that the contact resistance does not change at all. Industrial applicability

The non-contact heating device of the present invention,

(1) The overall length and depth of the heating device can be reduced to make the equipment very compact.

(2) Excellent energy-saving properties with very few compresses.

(3) The heating and cooling rates of the equipment are very fast, and the waiting time is short.

(4) The temperature of the heating tube can be detected accurately, and the temperature control accuracy is excellent.

(5) By forming the slit opening, the introduction of the filament material into the heating pipe can be performed easily and in a short time.

(6) It is possible to prevent the wire guide or the temperature sensor holding and wire guide from being displaced, moved or dropped.

(7) Since humidified air or non-oxidizing gas due to water vapor can be introduced into the heating tube, a non-contact heating device can be used for multiple purposes.

(8) A long device can be used with the heating tube maintained in a straight _line.c (9) Even if the workpiece is fed in a vibrating state, it is held by the small diameter portions of the guides at both ends. Therefore, there is no contact with the inner wall of the heating tube.

Replacement form (Rule 26) (10) The connection terminal member of the present invention can also be applied to a heating tube having no slit-like closure.

(11) It is possible to obtain a product with excellent shine and good texture with little deterioration of the filament material, especially the fiber.

Therefore, versatility and practical application of the non-contact heating device can be achieved.

Replacement form (Rule 26)

Claims

Scope of the request 1. In a non-contact type wire heating device having a heating tube having a passage for a wire to be heated formed therein, a temperature sensor is in direct contact with a heat-generating portion of the heating tube. It is characterized in that it is attached in a state where it does.

2. A non-contact type wire heating device having a heating tube in which a passage for the material to be heated is formed, wherein a temperature sensor is inserted into the heating tube.

3. A non-contact type wire heating device having a heating tube having a passage for a material to be heated formed therein, wherein a heat-resistant insulation protective layer is provided on the inner surface of the heating tube. I do.

4. In a non-contact type wire heating device having a heating tube with a passage for the wire to be heated inside, the heating tube is divided into a plurality of tubes in the length direction, It is characterized in that the divided heating tubes can be individually temperature-controlled.

5. In a non-contact type wire heating device having a heating tube with a passage for the wire to be heated inside, control the atmosphere inside the heating tube near one terminal of the heating tube or at the tubular guide. It is characterized by forming an inlet for introducing a gas for the purpose.

6. In a non-contact type wire heating device having a heating pipe with a passage for the wire to be heated inside, to introduce the wire from the side of the heating pipe over the entire length of the heating pipe A slit-shaped opening is provided.

7. The non-contact type wire heating device according to claim 6, wherein at least one of the slit-shaped openings is provided with a square groove or an R groove. The slit width is locally expanded.

8. A heater that encloses a heating tube in which a passage for a material to be heated is formed inside the heating tube.

Replacement form (Rule 26) A slit-shaped opening is provided for introducing the wire from the side of the heating tube, and the heater case is closed in the heater case so as to face the slit-shaped opening provided in the heating tube. A closable lid is provided.

9. The non-contact type wire heating device according to any one of claims 6 to 8, having a body size larger than a slit-shaped opening provided in the heating tube, In addition, a guide for introducing a filament material, which is a material to be heated, having a groove on a side surface for mounting a temperature sensor or a pin for preventing movement into the heating tube is incorporated in the heating tube. .

10. In a non-contact type wire heating device having a heating tube with a passage for the wire to be heated inside, it can be inserted into the terminal of the heating tube from both sides. The connection terminal member is connected.

Replacement form (Rule 26)