CN110607567B

CN110607567B - Spinning stretching device

Info

Publication number: CN110607567B
Application number: CN201911021795.3A
Authority: CN
Inventors: 杉山研志; 桥本欣三; 乾俊哉
Original assignee: TMT Machinery Inc
Current assignee: TMT Machinery Inc
Priority date: 2015-03-06
Filing date: 2016-03-03
Publication date: 2022-02-18
Anticipated expiration: 2036-03-03
Also published as: JP6532707B2; EP3064621A1; CN105937062B; EP3517657A1; CN110607567A; JP2016164314A; CN105937062A; EP3064621B1; EP3517657B1

Abstract

A spinning stretching device improves the accuracy of temperature control of a preheating roller for heating a yarn before stretching. The disclosed device is provided with: a preheating roller (33) for heating the yarn (Y) before drawing; tempering rollers (34, 35) set to a higher temperature and a higher speed than the preheating roller (33) and stretching the yarn (Y) between the tempering rollers and the preheating roller (33); an insulation box (20) for accommodating the preheating roller (33) and the conditioning rollers (34, 35); and heat shielding members (42-44) disposed around the preheating roller (33). In the inner surface of the heat-insulating box (20), heat-insulating portions (48, 49) are provided at least in part of a region facing an arrangement space (46) of the preheating roller (33) partitioned by the heat-shielding members (42-44).

Description

Spinning stretching device

The present invention is a divisional application entitled "spinning and drawing apparatus" with chinese patent application No. 201610119813.1 filed by the present applicant on 3/2016.

Technical Field

The present invention relates to a spinning and drawing apparatus for drawing a yarn spun from a spinning apparatus.

Background

As a spinning and drawing apparatus for drawing a yarn spun from a spinning apparatus, for example, patent document 1 discloses an apparatus in which a plurality of heating rollers and a plurality of texturing rollers are housed in a heat-insulating box. In this apparatus, after the wire is heated to a drawing temperature by a plurality of heating rollers, the wire is drawn between the heating rollers and a texturing roller, and the drawn wire is textured by the texturing roller. In this case, if the temperature of the heating roller changes due to the influence of the high-temperature tempering roller, the wire may not be maintained at a predetermined temperature during drawing. Therefore, in patent document 1, the heat radiation from the conditioner roll is blocked by covering the hot roll on the most downstream side with a shield cover.

Patent document 1: japanese patent laid-open publication No. 2014-101610

However, even if the periphery of the heating roller is covered with the shield cover, heat conduction through the side wall of the heat insulating box or the like cannot be suppressed. Therefore, the following problems occur: heat from the tempering roller set to be higher in temperature than the heating roller is transmitted into the space covered with the shield cover via the side wall of the heat-insulating box or the like, and as a result, the heating roller reaches the set temperature or higher and becomes high in temperature.

Disclosure of Invention

In view of the above problems, an object of the present invention is to improve the accuracy of temperature control of a preheating roller that heats a yarn before drawing in a spinning and drawing apparatus that draws the yarn spun from a spinning apparatus.

The spinning and drawing device of the present invention draws a yarn spun from a spinning device, and is characterized by comprising: a preheating roller for heating the yarn before drawing; a tempering roller disposed on a downstream side of the preheating roller in a wire traveling direction and set to a higher temperature and a higher speed than the preheating roller so that the wire is stretched between the tempering roller and the preheating roller; a heat insulation box for accommodating the preheating roller and the tempering roller; and a heat shielding member disposed around the preheating roller, wherein a heat insulating portion is provided in at least a part of a region of an inner surface of the heat insulating box, the region facing a space in which the preheating roller is disposed, the region being partitioned by the heat shielding member.

According to the present invention, the heat shield member disposed around the preheating roller can suppress the preheating roller from being affected by the heat radiation of the tempering roller. In addition, a heat insulating portion is provided in at least a part of a region of the inner surface of the heat insulating box, the region facing the space where the preheating roller is disposed, the space being partitioned by the heat shielding member. Therefore, even if heat from the conditioner roll having a higher temperature than the preheating roll reaches the vicinity of the preheating roll by heat conduction via the heat insulating box, the heat can be prevented from being transferred into the preheating roll arrangement space. Therefore, according to the present invention, the influence of both the heat radiation from the temper roll and the heat conduction on the preheat roll can be suppressed, and the accuracy of the temperature control of the preheat roll can be improved.

Here, the heat insulating portion is preferably provided in at least a part of a region of the inner surface of the heat insulating box facing the space where the preheating roll is disposed adjacent to the high-temperature space around the tempering roll.

The preheating rolls disposed in the preheating roll disposition spaces adjacent to the high-temperature space around the tempering rolls are easily affected by the tempering rolls and are easily brought to a higher temperature than the set temperature. Therefore, by providing the heat insulating portion in the preheating roller arrangement space, the temperature of the preheating roller, which is easily affected by the tempering roller, can be controlled with high accuracy.

Further, it is preferable that the heat insulating portion is provided in at least a part of a region of an inner surface of the heat insulating box, the region facing the space in which the preheating roller is disposed, the space heating the yarn immediately before the yarn is stretched.

The preheating roller that heats the yarn immediately before drawing has a large influence on the temperature of the yarn during drawing. Therefore, by providing the heat insulating portion in the space where the preheating rolls are arranged, the temperature of the yarn during drawing can be controlled favorably.

Preferably, an air layer is provided between the inner surface of the heat insulating box and the heat insulating portion.

In this way, the air layer can improve the heat insulation effect, and the heat transfer from the heat insulation box to the space in which the preheating roller is disposed can be further suppressed.

Preferably, the heat insulating portion has a structure in which a metal plate and a heat insulating material are laminated, and is disposed such that the metal plate faces the preheating roller and the heat insulating material faces the inner surface of the heat insulating box.

According to this configuration, for example, when the wire is broken, the broken wire is in contact with the metal plate side of the heat insulating portion, and the heat insulating material is not damaged by the broken wire, and the heat insulating function of the heat insulating portion can be prevented from being degraded.

Preferably, the heat insulating box has a side surface portion along an axial direction of the preheating roller, and the heat insulating portion is provided in a region of an inner surface of the side surface portion, the region facing a circumferential surface of the preheating roller.

By disposing the heat insulating portion in this manner, heat radiated from the side surface portion of the heat insulating box toward the circumferential surface of the preheating roller can be greatly reduced, and a temperature rise on the roller surface, which directly affects the temperature of the yarn, can be effectively suppressed.

Preferably, the heat insulating portion is provided also on an inner surface of a rear surface portion of the heat insulating box, and the heat insulating portions provided on the side surface portion and the rear surface portion are integrally formed.

By providing the heat insulating portion also on the rear surface portion of the heat insulating box in this manner, heat transferred from the rear surface portion to the space where the preheating roller is disposed can be reduced, and the temperature rise of the preheating roller can be suppressed more reliably. Further, the heat insulating portion provided in the back surface portion and the heat insulating portion provided in the side surface portion are integrally formed, so that the heat insulating portion can be easily attached.

Preferably, the heat insulating box has an opening/closing portion facing an end surface of the preheating roller, and the heat insulating portion is provided in a region facing the end surface of the preheating roller in an inner surface of the opening/closing portion.

By disposing the heat insulating portion in this manner, heat transferred from the opening/closing portion of the heat insulating box to the preheating roller can be reduced, and temperature rise of the preheating roller can be suppressed.

Preferably, a 2 nd heat insulating portion is provided between the high-temperature space and the space where the preheating rolls adjacent to the high-temperature space are disposed.

By providing such a 2 nd heat insulating portion, the amount of heat transferred directly from the high-temperature space to the space where the preheating rollers are disposed can be reduced, and the temperature rise of the preheating rollers can be suppressed more effectively.

Preferably, the heat insulating box is provided with an inlet for introducing the yarn, and an air introducing portion for guiding air flowing from the inlet to the preheating roller.

By providing such an air introduction portion, air having a relatively low temperature flowing into the interior of the heat insulating box from the introduction port is supplied to the preheating roller arrangement space, and the temperature rise of the preheating roller can be suppressed more effectively.

Here, the air introduction portion is preferably an opening formed in the heat shielding member provided on the inlet side of the preheating roller.

By forming the opening in the heat shielding member and using the opening as the air introduction portion in this manner, the air introduction portion can be easily provided without requiring installation of a new member or change in arrangement of members.

Effects of the invention

In the present invention, since the heat insulating portion is provided in at least a part of the region of the inner surface of the heat insulating box that faces the space in which the preheating roller is disposed, which is defined by the heat shielding member, the temperature of the preheating roller can be effectively prevented from being affected by the tempering roller, and the accuracy of temperature control of the preheating roller can be improved.

Drawings

Fig. 1 is a schematic view showing a spinning draft machine including a spinning stretching device according to the present embodiment.

Fig. 2 is a sectional view showing the internal configuration of the spinning stretching apparatus in detail.

Fig. 3 is a perspective view showing the heat insulating member.

Fig. 4 is a perspective view of the opening/closing unit in an opened state.

Fig. 5 is a sectional view of the opening/closing unit in a closed state.

Description of the reference symbols

3: a spinning stretching device;

20: a heat preservation box;

20 a: an inlet port;

22: an opening/closing section;

26. 27: a side surface portion;

28: a back portion;

31-33: a preheating roller;

33: finally, preheating the roller;

34. 35: a tempering roller;

42-44: a heat shield member;

42 a: an opening (air introduction portion);

46: a final preheating roller arrangement space;

48. 49, 52: a heat insulating portion;

48a, 49a, 52 a: a metal plate;

48b, 49b, 52 b: a thermally insulating material;

50: an air layer;

53: a heat insulating portion (2 nd heat insulating portion);

54: a high temperature space;

y: and (4) silk threads.

Detailed Description

An embodiment of the spinning and drawing apparatus according to the present invention will be described. Fig. 1 is a schematic view showing a spinning draft machine including a spinning stretching device according to the present embodiment. As shown in fig. 1, the spinning draft machine 1 is configured to stretch a plurality of yarns Y spun from the spinning device 2 by the spinning stretching device 3 and then wind the yarns Y by the yarn winding device 4. In the following, the description will be made with reference to the directions indicated in the drawings.

The spinning device 2 continuously spins a molten fiber material such as polyester to generate a plurality of threads Y. The plurality of yarns Y spun from the spinning device 2 are supplied with finish by the finish guide 10, and then are conveyed toward the spinning stretching device 3 via the guide roller 11. The spinning and drawing device 3 is a device for drawing a plurality of yarns Y, and is disposed below the spinning device 2. The spinning and drawing apparatus 3 is configured to have a plurality of godet rollers 31 to 35 provided inside the heat-insulating box 20. The spinning and drawing apparatus 3 will be described in detail later.

The plurality of yarns Y stretched by the spinning stretching device 3 are conveyed toward the yarn winding device 4 via the guide roller 12. The yarn winding device 4 is a device for winding a plurality of yarns Y, and is disposed below the spinning and drawing device 3. The yarn winding device 4 includes a bobbin holder 13, a contact roller 14, and the like. The bobbin holder 13 has a cylindrical shape extending in the depth direction of the drawing sheet of fig. 1, and is rotationally driven by a motor not shown. The bobbin holder 13 is assembled with a plurality of bobbins B arranged in parallel in the axial direction thereof. The yarn winding device 4 simultaneously winds a plurality of yarns Y around a plurality of bobbins B by rotating the bobbin holder 13, thereby producing a plurality of packages P. The contact roller 14 comes into contact with the surfaces of the plurality of packages P to apply a predetermined contact pressure, thereby arranging the shapes of the packages P.

The spinning and drawing apparatus 3 will be described in detail. The spinning and drawing apparatus 3 includes a plurality of (5 in this case) godet rollers 31 to 35 housed inside the heat-insulating box 20. Each of the godet rollers 31 to 35 is a heating roller that is rotationally driven by a motor not shown and has a heater not shown. An inlet 20a for introducing the plurality of yarns Y into the heat insulating box 20 is formed in a lower portion of the right side surface portion of the heat insulating box 20, and an outlet 20b for discharging the plurality of yarns Y to the outside of the heat insulating box 20 is formed in an upper portion of the right side surface portion of the heat insulating box 20. The plurality of yarns Y introduced from the inlet 20a are sequentially wound around the lower godet roller 31, and finally are led out from the outlet 20 b.

The godet rollers 31 to 35 are arranged to wind the yarn Y in a one-side winding manner. The lower 3 godet rolls 31 to 33 are preheating rolls for preheating before drawing the plurality of yarns Y, and the surface temperature of these rolls is set to a temperature equal to or higher than the glass transition temperature of the yarns Y (for example, about 80 ℃). On the other hand, the upper 2 godet rolls 34 and 35 are temper rolls for heat-setting the drawn yarns Y, and the roll surface temperatures thereof are set to be higher than the roll surface temperatures of the lower 3 godet rolls 31 to 33 (for example, about 130 to 140 ℃). The yarn feeding speed of the upper 2

godet rollers

34 and 35 is higher than that of the lower 3 godet rollers 31 to 33. In the following description, the godet rollers 31 to 33 are appropriately referred to as "preheating rollers", and the

godet rollers

34 and 35 are appropriately referred to as "conditioner rollers".

The plurality of yarns Y introduced into the heat-insulating box 20 through the inlet 20a are first preheated to a temperature at which the yarns Y can be stretched while being conveyed by the preheating rollers 31 to 33. The plurality of preheated yarns Y are stretched by the difference in the yarn feeding speed between the preheating roller 33 and the tempering roller 34. The plurality of yarns Y are further heated to a high temperature while being conveyed by the

texturing rollers

34, 35, and the drawn state is heat-set. The plurality of yarns Y thus stretched are led out of the heat insulation box 20 through the lead-out port 20 b.

Among the preheating rollers 31 to 33, the final preheating roller 33, which is disposed on the most downstream side in the running direction of the yarn and heats the yarn Y immediately before drawing, approaches the high-

temperature tempering rollers

34 and 35. Therefore, the roll surface temperature of the final preheating roll 33 is easily affected by the tempering rolls 34 and 35, and may become high above the set temperature. Since the temperature of the final preheating roller 33 has a large influence on the temperature of the yarn Y during drawing, if the temperature of the final preheating roller 33 is not properly controlled, the yarn Y cannot be maintained at a predetermined quality.

Therefore, in the spinning and drawing apparatus 3 of the present embodiment, the heat shielding member is disposed around the final preheating roller 33. Fig. 2 is a sectional view showing the internal configuration of the spinning stretching apparatus 3 in detail. Although not shown in fig. 1, a plurality of flow regulating members 41 to 45 are provided inside the heat insulating box 20 so as to substantially follow the running direction of the yarn Y in order to regulate the flow of air inside the heat insulating box 20. Among them, the flow regulating member 42 disposed between the preheating roll 31 and the final preheating roll 33, the tip end portion of the flow regulating member 43 disposed between the preheating roll 32 and the tempering roll 34, and the flow regulating member 44 disposed between the final preheating roll 33 and the tempering roll 35 roughly define an arrangement space 46 in which the final preheating roll 33 is arranged. The flow straightening members 42 to 44 disposed around the final preheating roller 33 function as "heat shielding members" for the final preheating roller 33.

The heat shielding members 42 to 44 have heat shielding performance, and the heat shielding members 42 to 44 are provided so as to surround the periphery of the final preheating roller 33, thereby suppressing heat radiation between the final preheating roller 33 and the

other rollers

31, 32, 34, and 35. In particular, by providing the

heat shielding members

43 and 44 between the final preheating roll 33 and the high-temperature tempering rolls 34 and 35, it is possible to suppress excessive temperature rise of the final preheating roll 33 due to heat radiation from the tempering rolls 34 and 35.

However, the temperature of the final preheating roller 33 may still be higher than the set temperature simply by providing the heat shielding members 42 to 44 so as to surround the periphery of the final preheating roller 33. This is considered to be because heat is transferred from the conditioning rolls 34 and 35 to the arrangement space 46 of the final preheating roll 33 by heat conduction through the heat insulating box 20. Therefore, in the spinning and drawing apparatus 3 of the present embodiment, the heat insulating portion is provided in at least a part of the region of the inner surface of the heat insulating box 20 facing the arrangement space 46 of the final preheating roller 33 partitioned by the heat shielding members 42 to 44.

Here, the structure of the incubator 20 will be described. As shown in fig. 4, the incubator 20 includes: a housing section 21 for housing the rollers 31-35 therein; and an opening/closing unit 22 rotatable with respect to the storage unit 21 with a hinge or the like not shown as a fulcrum. The housing section 21 is composed of a top section 23, a right side section 24, a right lower side section 25, a left lower side section 26, a left side section 27, and a back section 28, and rollers 31 to 35 protrude forward from the back section 28. The opening/closing unit 22 includes: a frame portion 29 that opens toward the face of the housing portion 21 side in the closed state; and a thermal conduction promoting portion 51 formed by filling the frame portion 29 with a material having a thermal conductivity higher than that of the constituent material of the frame portion 29. In the present embodiment, the housing portions 29 of the storage portion 21 and the opening/closing portion 22 are made of stainless steel having excellent strength, and the heat conduction promoting portion 51 is made of an aluminum alloy having a higher thermal conductivity than that of stainless steel.

In the present embodiment, as the "heat insulating portions" in the present invention, a side heat insulating portion 48 (see fig. 2 and 3) is provided on the inner surfaces of the left lower side surface portion 26 and the left side surface portion 27 of the heat insulating box 20, a back heat insulating portion 49 (see fig. 2 and 3) is provided on the inner surface of the back surface portion 28 of the heat insulating box 20, and a front heat insulating portion 52 (see fig. 4 and 5) is provided on the inner surface of the opening/closing portion 22 of the heat insulating box 20. The side surface heat insulating portion 48 and the back surface heat insulating portion 49 are integrally formed as a heat insulating member 47. Further, as the "2 nd heat insulating portion" in the present invention, a heat insulating portion 53 is provided on the final preheating roller 33 side of the heat shield member 44.

Fig. 3 is a perspective view showing the heat insulating member 47. In fig. 3, the final preheating roller 33 is not shown. The heat insulating member 47 has: a polygonal rear surface heat insulator 49 having an opening for arranging the final preheating roller 33 in the central portion; and a side surface heat insulating portion 48 provided standing from a part of the periphery of the back surface heat insulating portion 49. The side surface heat insulator 48 is formed by bending a plate material in accordance with the shape of the peripheral edge of the back surface heat insulator 49.

The side heat insulating portion 48 of the heat insulating member 47 is formed in a shape substantially along the left lower surface portion 26 and the left side surface portion 27 of the heat insulating box 20. The side surface heat insulating portion 48 is slightly spaced apart from the

side surface portions

26 and 27, and an air layer 50 is formed between the side surface heat insulating portion 48 and the

side surface portions

26 and 27. By providing such an air layer 50, the heat insulating effect by the side heat insulating portion 48 can be improved. However, if the layer thickness of the air layer 50 is large, heat transfer by convection becomes large, and the function as a heat insulating layer cannot be exhibited. Therefore, the layer thickness of the air layer 50 is preferably set to about 30mm or less, for example. On the other hand, the rear surface heat insulating portion 49 of the heat insulating member 47 is fixed by a bolt or the like, not shown, in a state of being in contact with the rear surface portion 28 of the heat insulating box 20, and no air layer is formed between the rear surface heat insulating portion 49 and the rear surface portion 28.

Here, the side surface heat insulating portion 48 is a structure in which a metal plate 48a as a structural body and a heat insulating coating material as a heat insulating material 48b applied to the surface of the metal plate 48a on the

side surface portions

26 and 27 side are laminated. Similarly, the back surface heat insulating portion 49 is also configured by laminating a metal plate 49a as a structural body and a heat insulating paint as a heat insulating material 49b applied to the surface of the metal plate 49a on the backrest top portion 28 side. By providing such side surface heat insulators 48 and back surface heat insulators 49, even if heat from the high-temperature conditioning rolls 34 and 35 is transferred to the vicinity of the arrangement space 46 of the final preheating roll 33 by heat conduction via the

side surface portions

26 and 27 and the back surface portion 28 of the heat insulating box 20, the heat can be suppressed from being transferred from the

side surface portions

26 and 27 and the back surface portion 28 to the arrangement space 46.

In the present embodiment, the heat insulating portion 53 is provided between the high-temperature space 54 formed around the tempering rolls 34 and 35 and the arrangement space 46 adjacent to the high-temperature space 54. Specifically, the heat insulating portion 53 is provided on the heat shielding member 44 on the side of the final preheating roller 33, and can reduce the amount of heat transferred directly from the high-temperature space 54 to the installation space 46. The heat insulating portion 53 is not necessarily provided separately from the heat shielding member 44, and the heat shielding member 44 may be formed of a material having low thermal conductivity, so that the heat shielding member 44 can function as a heat insulating portion. Further, similarly to the

heat insulating portions

48 and 49, the heat insulating portion 53 may be formed of a metal plate as a structural body and a heat insulating paint applied to the surface of the metal plate on the final preheating roller 33 side.

In the present embodiment, among the heat shielding members 42 to 44 disposed around the final preheating roller 33, the heat shielding member 42 provided on the side of the inlet 20a (see fig. 2) from the final preheating roller 33 is formed with a plurality of openings 42 a. The air flowing into the heat insulating box 20 from the inlet 20a flows along the flow path F formed between the circumferential surface of the preheating roller 31 positioned between the heat shielding member 42 and the inlet 20a and the inner surfaces of the right lower surface portion 25 and the left lower surface portion 26 of the heat insulating box 20 together with the accompanying flow generated along the running of the yarn Y. By providing the opening 42a on the extension line of the flow path F, the relatively low-temperature air flowing from the inlet 20a is supplied to the arrangement space 46 of the final preheating roller 33 through the opening 42a, and thus excessive temperature rise of the final preheating roller 33 can be prevented.

Next, the heat conduction promoting unit 51 and the front heat insulating unit 52 provided in the opening/closing unit 22 of the heat insulating box 20 will be described. Fig. 4 is a perspective view of the open/close unit 22 in a state opened, and fig. 5 is a sectional view of the open/close unit 22 in a state closed. More specifically, fig. 5 is a cross-sectional view of a vertical plane including the rotation axes of the final preheating roll 33 and the temper roll 35. In fig. 4, the rectifying members 41 to 45 and the heat insulating member 47 are not shown.

As described above, there is a problem that the final preheating roll 33 becomes a high temperature due to the heat from the high temperature temper rolls 34 and 35, which becomes a set temperature or higher. On the other hand, there is a demand for reducing the amount of electric power input to the preheating

rollers

31 and 32 by supplying heat from the high-

temperature tempering rollers

34 and 35 to the preheating

rollers

31 and 32.

In the present embodiment, in response to the above-described requirements, the stainless steel frame body portion 29 constituting the opening/closing portion 22 is filled with an aluminum alloy having a higher thermal conductivity than that of stainless steel, and the heat conduction promoting portion 51 is provided, whereby heat generated from the temper rolls 34, 35 is actively moved toward the preheat rolls 31, 32 via the heat conduction promoting portion 51 (see arrow T in fig. 5). By doing so, the electric power for heating the preheating

rollers

31, 32 can be reduced. In particular, as shown in fig. 5, the heat conduction promoting portion 51 protrudes from the frame body portion 29 toward the rollers 31 to 35, so that the distance between the heat conduction promoting portion 51 and the

conditioner rollers

34 and 35 is reduced, and the heat transfer efficiency by the heat conduction promoting portion 51 can be improved.

Here, it is considered that the electric power consumption at the preheating rolls 31 and 32 can be reduced by sending the high-temperature air near the tempering rolls 34 and 35 to the preheating rolls 31 and 32. However, in this case, there is a possibility that oil mist or the like generated in the vicinity of the high-temperature tempering rolls 34 and 35 is cooled by the low-temperature preheating rolls 31 and 32 and is fixed to the roll surfaces. In this regard, in the present embodiment for realizing heat transfer by heat conduction, since heat can be transferred only to the preheating

rollers

31 and 32 without moving oil mist or the like, contamination of the roller surfaces at the preheating

rollers

31 and 32 can be prevented.

In the present embodiment, the front surface heat insulating portion 52 is provided in a region of the inner surface of the opening/closing portion 22 (heat conduction promoting portion 51) that faces the end surface of the final preheating roller 33. As shown in fig. 4, the front heat insulating portion 52 has a structure in which a metal plate 52a as a structural body and a heat insulating coating material as a heat insulating material 52b applied to the surface of the metal plate 52a on the side of the opening/closing portion 22 are laminated. The front surface heat insulating portion 52 is provided in a form of being bonded to the surface of the heat conduction promoting portion 51.

By providing such a front heat insulating portion 52, it is possible to suppress heat generated from the conditioner rolls 34 and 35 from being radiated near the final preheating roll 33 while the heat generated from the conditioner rolls 34 and 35 moves toward the preheating rolls 31 and 32 in the heat conduction promoting portion 51. Therefore, the electric power for heating the preheating

rollers

31 and 32 can be reduced, and the situation in which the final preheating roller 33 becomes a high temperature at or above the set temperature can be suppressed. The front heat insulator 52 may be provided on the inner surface of the opening/closing portion 22, preferably over the entire region of the region facing the end surface of the final preheating roller 33, and more preferably over the entire region of the region facing the installation space 46 of the final preheating roller 33.

(Effect)

As described above, in the spinning and drawing apparatus 3 of the present embodiment, the

heat insulating portions

48, 49, and 52 are provided in at least a part of the region of the inner surface of the heat insulating box 20 that faces the arrangement space 46 of the final preheating roller 33 partitioned by the heat shielding members 42 to 44. Therefore, even if the heat from the tempering rolls 34 and 35, which is higher in temperature than the final preheating roll 33, reaches the vicinity of the final preheating roll 33 by the heat conduction via the heat insulating box 20, the heat can be prevented from being transferred into the arrangement space 46 of the final preheating roll 33. Therefore, the influence of the high-temperature tempering rolls 34 and 35 on the final preheating roll 33 can be suppressed not only in terms of heat radiation but also in terms of heat conduction, and the accuracy of temperature control of the final preheating roll 33 can be improved.

In the present embodiment, the heat insulating portion 53 is provided between the high-temperature space 54 around the tempering rolls 34 and 35 and the arrangement space 46 of the final preheating roll 33 adjacent to the high-temperature space 54. Therefore, the amount of heat transfer directly from the high-temperature space 54 to the arrangement space 46 can be reduced, and the temperature rise of the final preheating roller 33 can be more effectively suppressed.

Table 1 shows the set temperatures of the rollers 31 to 35 and the temperatures of the rollers 31 to 35 before and after the

heat insulators

48, 49, 52, and 53 are provided. Before the

heat insulators

48, 49, 52, and 53 are provided, the temperature of the final preheating roller 33 becomes 89 ℃ higher than the set temperature by 9 ℃, whereas the temperature of the final preheating roller 33 is maintained at 80 ℃ which is the set temperature by providing the

heat insulators

48, 49, 52, and 53. Thus, in the specific embodiment, it was also confirmed that the accuracy of temperature control of the final preheating roller 33 was improved.

[ TABLE 1 ]

In the present embodiment, since the air layer 50 is provided between the inner surface of the heat insulating box 20 and the heat insulating portion 48, the heat insulating effect can be improved, and the heat transfer from the heat insulating box 20 to the space 46 in which the final preheating roller 33 is disposed can be further suppressed.

In the present embodiment, the

heat insulating portions

48, 49, and 52 have a structure in which the

metal plates

48a, 49a, and 52a and the

heat insulating materials

48b, 49b, and 52b are laminated, and are arranged such that the

metal plates

48a, 49a, and 52a face the final preheating roller 33 side and the

heat insulating materials

48b, 49b, and 52b face the inner surface side of the heat insulating box 20. According to this configuration, for example, when the wire Y is broken, the broken wire Y is in contact with the

metal plates

48a, 49a, 52a of the

heat insulating portions

48, 49, 52, and the

heat insulating materials

48b, 49b, 52b are not damaged by the broken wire Y, and the heat insulating function of the

heat insulating portions

48, 49, 52 can be prevented from being degraded.

In the present embodiment, the heat insulating box 20 has the

side surface portions

26 and 27 along the axial direction of the final preheating roller 33, and the heat insulating portion 48 is provided in a region of the inner surfaces of the

side surface portions

26 and 27, which region faces the circumferential surface of the final preheating roller 33. By disposing the heat insulating portion 48 in this way, heat radiated from the

side surface portions

26, 27 of the heat insulating box 20 toward the circumferential surface of the final preheating roller 33 can be greatly reduced, and a temperature rise of the roller surface which directly affects the temperature of the yarn Y can be effectively suppressed.

In the present embodiment, the heat insulating portion 49 is also provided on the inner surface of the back surface portion 28 of the heat insulating box 20, and the

heat insulating portions

48 and 49 provided on the

side surface portions

26 and 27 and the back surface portion 28 are integrally formed. By providing the heat insulating portion 49 also in the rear surface portion 28 of the heat insulating box 20, heat transferred from the rear surface portion 28 to the arrangement space 46 of the final preheating roller 33 can be reduced, and a temperature rise of the final preheating roller 33 can be more reliably suppressed. Further, by integrally forming the heat insulating portion 49 provided in the back surface portion 28 and the heat insulating portions 48 provided in the

side surface portions

26 and 27, the

heat insulating portions

48 and 49 can be easily attached.

In the present embodiment, the heat insulating box 20 has the opening/closing portion 22 facing the end surface of the final preheating roller 33, and the heat insulating portion 52 is provided in a region facing the end surface of the final preheating roller 33 in the inner surface of the opening/closing portion 22. By disposing the heat insulating section 52 in this manner, the heat transferred from the opening/closing section 22 of the heat insulating box 20 to the final preheating roller 33 can be reduced, and the temperature rise of the final preheating roller 33 can be suppressed.

In the present embodiment, the heat-insulating box 20 is provided with an inlet 20a for introducing the yarn Y, and an air introducing portion 42a for guiding the air flowing from the inlet 20a to the final preheating roller 33. By providing such an air introduction portion 42a, relatively low-temperature air flowing into the inside of the heat insulation box 20 from the introduction port 20a is supplied to the arrangement space 46 of the final preheating roller 33, and the temperature rise of the final preheating roller 33 can be more effectively suppressed.

In particular, in the present embodiment, since the air introduction portion 42a is formed as an opening formed in the heat shielding member 42 provided on the side of the introduction port 20a from the final preheating roller 33, the air introduction portion 42a can be easily provided without requiring installation of new components or change in arrangement of components.

[ other embodiments ]

While the embodiments of the present invention have been described above, the embodiments to which the present invention can be applied are not limited to the above-described embodiments, and modifications can be appropriately made within the scope not departing from the gist of the present invention as exemplified below.

For example, in the above embodiment, the

heat insulating portions

48, 49, 52, and 53 provided around the arrangement space 46 of the final preheating roller 33 are explained. However, in the case where the problem of the preheating rolls 31 and 32 other than the final preheating roll 33 becoming high temperature at or above the set temperature due to the heat from the high-temperature tempering rolls 34 and 35 occurs, a heat insulating portion may be provided around the space where the preheating rolls 31 and 32 are disposed. For example, since the preheating roller 32 is disposed adjacent to the high temperature region 54, the temperature thereof is likely to be higher than the set temperature. Therefore, it is also effective to provide a heat insulating portion at a portion (for example, the heat shielding member 43, the right side surface portion 24, and the like) facing the arrangement space (the space substantially partitioned by the heat shielding members 41 to 43) of the preheating roller 32. The number and arrangement of the rollers can be changed as appropriate.

In the above embodiment, the

heat insulators

48, 49, and 52 are provided on the inner surfaces of the

side surface portions

26 and 27, the back surface portion 28, and the opening/closing portion 22 of the heat insulating box 20, respectively, and the heat insulating portion 53 is provided on the heat shielding member 44. However, the location at which the heat insulating portion is provided may be changed as appropriate.

In the above embodiment, the rear surface heat insulating portion 49 and the front surface heat insulating portion 52 are not provided with an air layer between the rear surface heat insulating portion 49 and the inner surface of the heat insulating box 20, but a spacer or the like may be provided to provide an air layer between the

heat insulating portions

49 and 52 and the inner surface of the heat insulating box 20.

In the above embodiment, the

heat insulating portions

48, 49, and 52 are formed by applying a heat insulating coating material as the

heat insulating materials

48b, 49b, and 52b to the

metal plates

48a, 49a, and 52 a. However, the specific configuration of the

heat insulating portions

48, 49, 52 is not limited to this, and a member having a lower thermal conductivity than the

metal plates

48a, 49a, 52a may be bonded to the

metal plates

48a, 49a, 52 a.

In the above embodiment, the heat shielding member 42 is provided with a plurality of openings 42a as an air introduction portion for supplying air from the inlet 20a to the final preheating roller 33. However, the structure of the air introduction portion is not limited to this, and for example, the heat shielding member 42 may not be originally disposed on the extension line of the flow path F in fig. 2.

In the above embodiment, the heat conduction promoting unit 51 is provided only in the opening/closing unit 22. However, the heat conduction promoting portion 51 may be provided in another part of the incubator 20. The material of each part constituting the incubator 20 can be appropriately changed.

Claims

1. A spinning and drawing device for drawing a yarn spun from a spinning device, comprising:

a preheating roller for heating the yarn before drawing;

a tempering roller disposed on a downstream side of the preheating roller in a wire traveling direction and set to be higher in temperature and higher in speed than the preheating roller so that the wire is stretched between the tempering roller and the preheating roller;

an insulation box for accommodating the preheating roller and the tempering roller; and

a heat shielding member disposed around the preheating roller,

a heat insulating part is provided in at least a part of a region of the inner surface of the heat insulating box facing the space where the preheating roller is disposed partitioned by the heat shielding member,

an inlet for introducing the yarn is formed in the heat-insulating box, and an air introducing part for guiding the air flowing in from the inlet to the preheating roller is provided,

the air introduction part is an opening through which the yarn does not run, the opening being formed in the heat shielding member provided on the inlet side of the preheating roller.

2. The spin draw apparatus of claim 1,

the heat insulating portion is provided in at least a part of a region of an inner surface of the heat insulating box facing a space where the preheating roller is disposed adjacent to a high-temperature space around the tempering roller.

3. The spin draw apparatus of claim 1,

the heat insulating portion is provided in at least a part of a region of an inner surface of the heat insulating box facing the space in which the preheating roller is disposed to heat the yarn immediately before drawing.

4. The spin draw apparatus of any one of claims 1 to 3,

the heat insulating portion is configured by laminating a metal plate and a heat insulating material, and is disposed such that the metal plate faces the preheating roller side and the heat insulating material faces the inner surface side of the heat insulating box.

5. The spin draw apparatus of claim 1,

the heat insulating box has a side surface portion along an axial direction of the preheating roller, and the heat insulating portion is provided in a region of an inner surface of the side surface portion, the region facing a circumferential surface of the preheating roller.

6. The spin draw apparatus of claim 5,

the heat insulating portion is also provided on an inner surface of a back surface portion of the heat insulating box, and the heat insulating portions provided on the side surface portion and the back surface portion are integrally formed.

7. The spin draw apparatus of claim 1,

the heat insulating box has an opening/closing portion facing an end surface of the preheating roller, and the heat insulating portion is provided in a region facing the end surface of the preheating roller in an inner surface of the opening/closing portion.

8. The spin draw apparatus of claim 2,

a 2 nd heat insulating portion is provided between the high-temperature space and the space where the preheating rolls adjacent to the high-temperature space are disposed.