Melt spinning apparatus

Abstract

The present application relates to a melt spinning device, which improves the efficiency of heat supply from a heating case to a spinning assembly and suppresses the heat supply to the spinning assembly from becoming uneven in the circumferential direction. The melt spinning device (1) is provided with: a spinning assembly (2) in a cylindrical shape, which has a spinning nozzle (21); a heating case (3), which has a recess (32) into which the spinning assembly (2) is inserted and which is open downward; and a heat conduction mechanism (4), which has a divided member (42) that can be in contact with the outer peripheral surface of the spinning assembly (2) inserted into the recess (32) and that is divided into a plurality of pieces in the circumferential direction of the spinning assembly (2). Furthermore, when the spinning assembly (2) is inserted into the recess (32), the heat conduction path from the wall surface that divides the recess (32) in the heating case (3) to the outer peripheral surface of the spinning assembly (2) is constituted by the members that the heat conduction mechanism (4) including the divided member (42) has.

Description

TECHNICAL FIELD

[0001] The present application relates to a melt spinning device for spinning a polymer. BACKGROUND

[0002] Generally, a melt spinning device is provided with a heating case which is heated to a temperature above the melting point of a polymer, and a spinning assembly which is detachably attached to the heating case. In the melt spinning device, a molten polymer supplied to the spinning assembly via a polymer flow path formed inside the heating case is spun from a spinning nozzle of the spinning assembly.

[0003] For example, as shown in Patent Literature 1, a recess which is open downward and into which the spinning assembly is inserted is formed in the heating case. A component mounting portion in which the spinning assembly is mounted is provided in the recess. Between the heating case and the spinning assembly, more specifically, between a wall surface which divides the recess formed in the heating case and an outer peripheral surface of the spinning assembly mounted in the component mounting portion, a gap of about 1 mm is interposed. Heat from the heating case is supplied to the spinning assembly mounted in the component mounting portion via an air layer present in the gap between the heating case and the spinning assembly. Since the thermal resistance of the air layer is relatively large, there is a problem that heat from the heating case cannot be sufficiently transferred to the spinning assembly.

[0004] The spinning assembly (spinneret assembly in Patent Literature 2) of the melt spinning device disclosed in Patent Literature 2 is such that the outer peripheral surface of the spinneret is formed in a conical shape. Further, the melt spinning device is provided with a ring-shaped heating block, an inner peripheral surface of which has a conical shape which is the same inclination and in the same direction as that of the spinning assembly. The heating block is arranged so as to be in contact with the outer peripheral surface of the spinneret in the spinning assembly. Thus, heat from the heating block is transferred to the spinning assembly without passing through an air layer.

[0005] Patent Literature 1: Japanese Patent Application Laid-Open No. 2012-102435

[0006] Patent Literature 2: Japanese Patent Application Laid-Open No. Sho 60-86569

[0007] In Patent Literature 2, the ring-shaped heating block is brought into contact with the outer peripheral surface of the spinneret in the spinning assembly. Thus, the contact between the heating block and the spinning assembly can become a one-sided contact state due to the machining accuracy of the components, positional displacement between the heating block and the spinning assembly, or the like. As a result, the supply of heat to the spinning assembly becomes uneven in the circumferential direction. SUMMARY

[0008] An object of the present application is to provide a melt spinning device which can improve the efficiency of the supply of heat from a heating case to a spinning assembly and can suppress the supply of heat to the spinning assembly from becoming uneven in the circumferential direction.

[0009] The melt spinning device of the first invention is characterized by including: a cylindrical spinning assembly having a spinning nozzle; a heating case having a recess into which the spinning assembly is inserted and which is open downward; and a heat conduction mechanism having a divided member that is capable of contacting an outer peripheral surface of the spinning assembly inserted into the recess and is divided in a circumferential direction of the spinning assembly, and a heat conduction path from a wall surface of the heating case that divides the recess to the outer peripheral surface of the spinning assembly is formed by a member of the heat conduction mechanism including at least the divided member when the spinning assembly is inserted into the recess.

[0010] In the invention, heat from the heating case is transmitted to the spinning assembly through the heat conduction path formed by the member of the heat conduction mechanism including at least the divided member. Therefore, compared to a case where heat from the heating case is transmitted to the spinning assembly via an air layer, the efficiency of supplying heat from the heating case to the spinning assembly can be improved. In addition, the divided member is divided in the circumferential direction of the spinning assembly, and thus contact between the spinning assembly and the divided member is less likely to be a one-sided contact state. Therefore, the supply of heat to the spinning assembly can be made less uneven in the circumferential direction.

[0011] The melt spinning device of the second invention is characterized in that the divided member contacts a range in the outer peripheral surface of the spinning assembly inserted into the recess in which the spinning nozzle of the spinning assembly is arranged in the axial direction of the spinning assembly.

[0012] In the invention, heat from the heating case is easily transmitted to the portion of the outer peripheral surface of the spinning assembly in which the spinning nozzle is arranged, by the heat conduction mechanism. Therefore, a decrease in the quality of a yarn due to a lower temperature of the spinning nozzle can be suppressed.

[0013] The melt spinning device of the third invention is characterized in that the heat conduction mechanism further includes a first inclined surface that is located on the opposite side from the spinning assembly with the divided member interposed therebetween and is inclined such that one end in the vertical direction is located closer to the outer peripheral surface of the spinning assembly than the other end, the divided member has a second inclined surface that has the same inclination angle as the first inclined surface and is configured to be movable in the vertical direction in a state where the second inclined surface contacts the first inclined surface.

[0014] In the invention, the divided member is moved in the vertical direction in a state where the second inclined surface thereof contacts the first inclined surface, and thus is movable in a direction closer to the outer peripheral surface of the spinning assembly and a direction farther from the outer peripheral surface of the spinning assembly. Therefore, the divided member can be brought into contact with the outer peripheral surface of the spinning assembly regardless of the size of a gap between the heating case and the spinning assembly.

[0015] The melt spinning device of the fourth invention is characterized in that the first inclined surface is inclined so that the upper end is located closer to the outer circumferential surface of the spinning assembly than the lower end, and the partition member is located below the first inclined surface.

[0016] In the present invention, by arranging the partition member below the first inclined surface, the assembly of the heat transfer mechanism can be easily performed.

[0017] The melt spinning device of the fifth invention is characterized in that the partition member is fixed to the first inclined surface by a bolt.

[0018] In the present invention, the partition member can be fixed to the first inclined surface by being fastened by a bolt, and thus the contact pressure between the partition member and the spinning assembly can be increased. Therefore, the efficiency of heat supply from the heating case to the spinning assembly can be further increased.

[0019] The melt spinning device of the sixth invention is characterized in that the heat transfer mechanism further includes a force applying member that applies an upward force to the partition member.

[0020] In the present invention, by applying an upward force to the partition member by the force applying member, the partition member can be reliably brought into contact with the outer circumferential surface of the spinning assembly.

[0021] The melt spinning device of the seventh invention is characterized in that the first inclined surface is inclined so that the lower end is located closer to the outer circumferential surface of the spinning assembly than the upper end, and the partition member is located above the first inclined surface.

[0022] In the present invention, the partition member is located above the first inclined surface, and thus the partition member moves downward by its own weight. Therefore, the partition member can be reliably brought into contact with the outer circumferential surface of the spinning assembly.

[0023] The melt spinning device of the eighth invention is characterized in that the heat transfer mechanism further includes a fixing member that is installed to a wall surface that divides the recess in the heating case and has the first inclined surface, and a first heat insulating member that covers the lower surface of the fixing member.

[0024] In the present invention, by the first heat insulating member, the heat dissipation from the lower surface of the fixing member that is in contact with the outside air can be suppressed. Therefore, the efficiency of heat supply from the heating case to the spinning assembly can be further increased.

[0025] The melt spinning device of the ninth invention is characterized in that the heat transfer mechanism further includes a second heat insulating member that covers the lower surface of the partition member.

[0026] In this invention, the second heat insulation component can suppress heat dissipation from the lower surface of the segmented component that is in contact with external gas. Therefore, the efficiency of heat supply from the heating chamber to the spinning assembly can be further improved. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of the melt spinning apparatus according to the first embodiment of the present invention.

[0028] Figure 2 yes Figure 1 Enlarged view of the lower end of the recess in the heating chamber of the melt spinning apparatus shown, (a) shows the state with the bolt loosened, and (b) shows the state with the bolt tightened.

[0029] Figure 3 Viewed from below Figure 1 The diagram shown is a partially enlarged perspective view of the melt spinning apparatus, and it is a diagram showing the state after the segmented components have been decomposed.

[0030] Figure 4 This is a graph showing the temperature change of the spinning spinneret in the melt spinning apparatus of the first embodiment and the comparative example.

[0031] Figure 5 This is a cross-sectional view near the lower end of the recess in the heating chamber of the melt spinning apparatus according to the second embodiment of the present invention. (a) shows the state when the spinning assembly is not inserted into the recess, (b) shows the state when the spinning assembly is inserted into the recess, and (c) shows the state when the spinning assembly is removed from the recess.

[0032] Figure 6 This is a cross-sectional view near the lower end of the recess in the heating chamber of the melt spinning apparatus according to the third embodiment of the present invention.

[0033] Figure 7 This is a cross-sectional view near the lower end of the recess in the heating chamber of the melt spinning apparatus according to the fourth embodiment of the present invention.

[0034] Explanation of symbols

[0035] 1, 101, 201, 301: Melt spinning device; 2: Spinning assembly; 3: Heating box; 4, 104, 204, 304: Heat conduction mechanism; 21: Spinning spinneret; 32: Recess; 41, 141, 241: Fixing component; 41a, 141a, 241a: First inclined surface; 42, 142, 242, 342: Dividing component; 43a, 143a, 243a: Second inclined surface; 45: Bolt; 46a, 146a, 246a: Heat insulation component (first heat insulation component); 46b, 146b, 246b, 346b: Heat insulation component (second heat insulation component); 247: Spring (force application component). Detailed Implementation

[0036] <First Implementation>

[0037] First, refer to Figure 1 The overall configuration of the melt spinning apparatus 1 according to the first embodiment of the present invention will be described. The melt spinning apparatus 1 mainly includes: a cylindrical spinning assembly 2 having a spinning spinneret 21; a heating chamber 3 having a recess 32 with a downward opening; a heat conduction mechanism 4; and a cooling chamber 6.

[0038] A component mounting part 31 for detachably mounting the spinning assembly 2 is provided within the recess 32 of the heating chamber 3. The spinning assembly 2, mounted on the component mounting part 31, is inserted into the internal space of the recess 32 with its axial direction aligned vertically. The recess 32 is circular when viewed in plan view. The recess 32 extends along... Figure 1 Multiple portions of the paper are arranged in an alternating pattern along orthogonal directions. A recess 32a is formed at the lower end of the wall surface that divides the recess 32. Furthermore, in this specification, the wall surface that divides the recess 32a is defined as a portion of the wall surface that divides the recess 32. A portion of the heat conduction mechanism 4 is disposed in this recess 32a. The gap between the portion of the wall surface that divides the recess 32, excluding the portion where the recess 32a is formed, and the outer peripheral surface of the spinning assembly 2 inserted into the recess 32 is approximately 1 mm.

[0039] Inside the heating chamber 3, multiple polymer flow paths 33 are provided from a spinning pump (not shown) to spinning assemblies 2 respectively mounted in assembly mounting sections 31 located in multiple recesses 32. The assembly mounting sections 31 are fixed to the bottom surface of the recesses 32 by screws (not shown). Each assembly mounting section 31 has a downwardly protruding connecting portion 31a with external threads formed on its outer peripheral surface. A through hole 31b is formed in the assembly mounting section 31, serving as the end of each polymer flow path 33.

[0040] The heating chamber 3 contains a heat transfer fluid (steam) supplied by a heat transfer fluid boiler (not shown) within its internal space 3a. The outer surface of the heating chamber 3 is covered, for example, by an insulation component 5 such as ceramic fiber felt.

[0041] The spinning assembly 2 has an assembly member 23 formed with an internal space 2a which is connected to the polymer flow path 33 when the spinning assembly 2 is mounted to the assembly mounting portion 31. A filter member 22 is disposed in the internal space 2a of the assembly member 23. A threaded mounting portion 23a is formed in the assembly member 23, which is recessed from the upper surface of the assembly member 23 and has an inner thread formed on the inner peripheral surface thereof corresponding to an outer thread of the connecting portion 31a of the assembly mounting portion 31, and is capable of being threadedly mounted to the connecting portion 31a. Further, an opening 23b is formed in the lower end of the assembly member 23 which is open in the thickness direction and which communicates the internal space 2a with the outside. The spinning nozzle 21 is fitted in the opening 23b.

[0042] The cooling box 6 is disposed below the heating box 3. A seal 7 is disposed on the upper surface of the cooling box 6. The cooling box 6 is capable of being moved up and down by a drive mechanism not shown, and is capable of assuming a state in which the lower surface of the heating box 3 is brought into abutment with the seal 7 (a state shown in FIG. 1) and a state in which the lower surface of the heating box 3 is separated from the seal 7. Figure 1

[0043] An opening 71 is formed in the seal 7 in a portion which opposes the recess 32 of the heating box 3. Further, openings 61, 62 are formed in the upper wall and the lower wall of the cooling box 6, respectively, in portions which oppose the recess 32 of the heating box 3. Further, the portion of the cooling box 6 which opposes the recess 32 of the heating box 3 becomes a filament running space 6a through which the molten polymer spun from the spinning nozzle 21 passes. In the cooling box 6, the filament running space 6a is separated from the other portions by a filter 63. Cooling air is pressure-fed to the cooling box 6 via a pipe not shown. The cooling air pressure-fed into the cooling box 6 is pressure-fed to the filament running space 6a via the filter 63.

[0044] The molten spinning device 1 configured as described above is such that heat medium steam is supplied to the internal space 3a of the heating box 3 from a heat medium boiler not shown. Then, the heating box 3 is heated to a prescribed spinning temperature which is higher than the melting point of the polymer by the heat medium steam supplied to the internal space 3a of the heating box 3. After that, a plurality of spinning assemblies 2 which are preheated to the same temperature as the above-described spinning temperature by a heater not shown or the like are inserted into each of the recesses 32 of the heating box 3 and mounted to the assembly mounting portions 31. Heat from the heating box 3 is transferred to the spinning assemblies 2 mounted to the assembly mounting portions 31 by the heat transfer mechanism 4.

[0045] ​Then, molten polymers such as nylon and polyester, delivered at high temperatures from the spinning pump (not shown), are fed into the internal space 2a of the spinning assembly 2 via the polymer flow path 33. The molten polymer fed into the internal space 2a of the spinning assembly 2 is filtered by the filter element 22 and then spun out from the spinning spinneret 21. The molten polymer spun from the spinning spinneret 21 passes through the yarn travel space 6a within the cooling chamber 6. At this time, the molten polymer traveling in the yarn travel space 6a is cooled by cooling air that is pressurized into the yarn travel space 6a.

[0046] Next, refer to Figure 2 (a), (b) and Figure 3 The structure of the heat transfer mechanism 4 will be described. The heat transfer mechanism 4 is disposed in the gap between the wall surface dividing the recess 32 formed in the heating chamber 3 and the spinning assembly 2 inserted into the recess 32. The heat transfer mechanism 4 mainly includes a fixing component 41, a dividing component 42 composed of four moving blocks 43, and heat insulation components 46a and 46b. The fixing component 41 and the dividing component 42 are preferably made of materials with high thermal conductivity, such as aluminum alloy, copper alloy, ordinary steel, alloy steel, special steel, carbon fiber composite material, silicone rubber, etc. The materials of the fixing component 41 and the dividing component 42 only need to be materials with a thermal conductivity at least higher than that of a non-flowing air layer.

[0047] The fixing member 41 contacts the wall surface that divides the recess 32 in the heating chamber 3. The fixing member 41 is mounted to the wall surface that divides the recess 32 in the heating chamber 3 by bolts (not shown) or the like. The fixing member 41 is located on the opposite side of the spinning assembly 2, separated by the dividing member 42. The fixing member 41 is disposed in a recess 32a at the lower end of the wall surface that divides the recess 32 in the heating chamber 3. The fixing member 41 is configured to surround the spinning assembly 2 inserted into the recess 32.

[0048] like Figure 2 As shown in (a) and (b), the fixing member 41 has a first inclined surface 41a, which is inclined such that its upper end is located closer to the outer peripheral surface of the spinning assembly 2 than its lower end. The first inclined surface 41a is positioned in the gap between the wall surface dividing the recess 32 formed in the heating chamber 3 and the outer peripheral surface of the spinning assembly 2 inserted into the recess 32, facing towards the spinning assembly 2. Figure 3 As shown, the first inclined surface 41a is a plane and is arranged in four ways to surround the spinning assembly 2 inserted into the recess 32.

[0049] Four screw holes 41b are formed in the fixed member 41, and correspond to long holes 43c (described later) formed in the four moving blocks 43 that constitute the divided member 42. The screw holes 41b extend in the up-and-down direction and pass through the fixed member 41. The lower ends of the screw holes 41b are open on the first inclined surface 41a. The lower surface of the fixed member 41 is covered by a heat insulating member 46a, for example, a ceramic fiber mat.

[0050] The divided member 42 is located below the first inclined surface 41a of the fixed member 41 between the fixed member 41 and the spinning pack 2. As shown in Figure 3 , the divided member 42 is constituted by four moving blocks 43 arranged in the circumferential direction of the spinning pack 2 inserted into the recess 32. That is, the divided member 42 is divided into four in the circumferential direction of the spinning pack 2 inserted into the recess 32. The lower surface of the moving block 43 is covered by a heat insulating member 46b, for example, a ceramic fiber mat.

[0051] Each moving block 43 has a second inclined surface 43a corresponding to any one of the four first inclined surfaces 41a of the fixed member 41. The second inclined surface 43a has the same inclination angle as the corresponding first inclined surface 41a. The second inclined surface 43a is toward the wall surface that divides the recess 32 in the gap between the wall surface that divides the recess 32 formed in the heating box 3 and the outer peripheral surface of the spinning pack 2 inserted into the recess 32.

[0052] The moving block 43 has a contact surface 43b having substantially the same curvature as the curvature of the outer peripheral surface of the spinning pack 2 and capable of contacting the outer peripheral surface of the spinning pack 2 inserted into the recess 32. The contact surface 43b is toward the spinning pack 2 in the gap between the wall surface that divides the recess 32 formed in the heating box 3 and the outer peripheral surface of the spinning pack 2 inserted into the recess 32.

[0053] As shown in (a) and (b) of Figure 2 , a long hole 43c that passes through the moving block 43 in the up-and-down direction is formed in the moving block 43. The long hole 43c is open on the second inclined surface 43a. As shown in Figure 3 , the long hole 43c has an elliptical shape that is longer in the direction orthogonal to the outer peripheral surface of the spinning pack 2. By screwing the front end of the bolt 45 inserted into the long hole 43c from below into the screw hole 41b formed in the fixed member 41, the moving block 43 can be fixed to the fixed member 41.

[0054] As shown in Figure 2As shown in (a), with the bolt 45 loosened, the moving block 43 can move vertically while the second inclined surface 43a is in contact with the first inclined surface 41a of the fixed member 41. The moving block 43 moves upward while the second inclined surface 43a is in contact with the first inclined surface 41a, thereby moving towards the spinning assembly 2 (away from the heating chamber 3). Furthermore, the moving block 43 moves downward while the second inclined surface 43a is in contact with the first inclined surface 41a, or when the second inclined surface 43a separates from the first inclined surface 41a downward, thereby moving away from the spinning assembly 2 (away from the heating chamber 3).

[0055] like Figure 2 As shown in (b), the movable block 43 moves upward by the fastening bolt 45 and comes into contact with the outer peripheral surface of the spinning assembly 2 inserted into the recess 32. Figure 2 As shown in (b), when at least one movable block 43 is in contact with the outer peripheral surface of the spinning assembly 2, the contact surface 43b of the at least one movable block 43 is in contact with the outer peripheral surface of the spinning assembly 2 in the circumferential direction. That is, when all four movable blocks 43 are in contact with the outer peripheral surface of the spinning assembly 2, the dividing member 42 (four movable blocks 43) is in contact with the outer peripheral surface of the spinning assembly 2 in the circumferential direction. When all four movable blocks 43 are in contact with the outer peripheral surface of the spinning assembly 2, there is almost no gap between adjacent movable blocks 43. Therefore, the dividing member 42 (four movable blocks 43) surrounds the spinning assembly 2 almost the entire circumference of the spinning assembly 2. The contact surface 43b of the movable blocks 43 and the area A (refer to) in the outer peripheral surface of the spinning assembly 2 inserted into the recess 32 where the spinning spinneret 21 is arranged in the axial (vertical) direction of the spinning assembly 2. Figure 2 (b) Contact. In this embodiment, the entire contact surface 43b is located within range A.

[0056] When the contact surface 43b of the moving block 43 contacts the outer peripheral surface of the spinning assembly 2, a heat conduction path is formed from the wall surface dividing the recess 32 in the heating chamber 3 to the outer peripheral surface of the spinning assembly 2 through the fixing member 41 and the moving block 43. Thus, heat from the heating chamber 3 is first transferred to the fixing member 41, which is in contact with the heating chamber 3. Then, the heat transferred to the fixing member 41 is transferred to the moving block 43, which is in contact with the fixing member 41. Finally, the heat transferred to the moving block 43 is transferred to the spinning assembly 2, which is in contact with the moving block 43.

[0057] When assembling or disassembling the spinning assembly 2 relative to the assembly mounting portion 31, the bolt 45 is loosened, allowing the movable block 43 to move. At this time, the movable block 43 moves downwards under gravity, thereby moving towards the heating chamber 3 (away from the spinning assembly 2 inserted into the recess 32). This allows the spinning assembly 2 to be assembled or disassembled relative to the assembly mounting portion 31. Figure 2 (as shown in (a)). After the spinning assembly 2 is installed in the assembly mounting part 31, the bolt 45 is tightened, so that the contact surface 43b of the moving block 43 is in contact with the outer peripheral surface of the spinning assembly 2. Figure 2 (as shown in (b)).

[0058] In the melt spinning apparatus 1, a so-called surface cleaning operation is required periodically to remove foreign matter adhering to the surface of the spinning spinneret 21. During the surface cleaning operation, the molten polymer spun from the spinning spinneret 21 is discarded. Therefore, in order not to waste the molten polymer, the surface cleaning operation is sometimes performed while the spinning of the molten polymer from the spinning spinneret 21 has stopped. During the surface cleaning operation, the cooling box 6 is moved downward so that it changes from a state where the cooling box 6 is in contact with the lower surface of the heating box 3 via the seal 7 to a state where the cooling box 6 is separated from the lower surface of the heating box 3. After the surface cleaning operation, the cooling box 6 is moved upward so that it changes from a state where the cooling box 6 is separated from the lower surface of the heating box 3 to a state where the cooling box 6 is in contact with the lower surface of the heating box 3 via the seal 7. The spinning assembly 2 is preheated to a specified temperature before being installed into the heating chamber 3. However, before the cooling chamber 6 comes into contact with the lower surface of the heating chamber 3, the spinning spinneret 21 is exposed to external gas, causing its temperature to drop. When the temperature of the spinning spinneret 21 drops, the quality of the spun yarn decreases when molten polymer is spun again from the spinning spinneret 21 after a surface cleaning operation. Therefore, it is desirable to rapidly raise the temperature of the spinning spinneret 21 after the surface cleaning operation.

[0059] Here, in Figure 4 The graph shows the temperature change of the spinning spinneret 21 in the melt spinning apparatus of the embodiments and comparative examples. Figure 4 The curve specifically represents the temperature change of the spinning spinneret 21 after the spinning assembly 2 is installed on the heating chamber 3.

[0060] The embodiment is that the material of the fixed member 41 and the partition member 42 in the melt spinning device 1 of the above-described first embodiment is ordinary steel. The melt spinning device of the comparative example has the same configuration as the melt spinning device 1 of the above-described embodiment except that the heat transfer mechanism 4 is not provided and the recess 32a is not formed in the recess 32 of the heating case 3. In the melt spinning device of the comparative example, the gap between the wall surface that divides the recess 32 and the outer peripheral surface of the spinning assembly 2 inserted into the recess 32 is about 1.0 mm. In the melt spinning device of the comparative example, heat from the heating case 3 is supplied to the spinning assembly 2 via an air layer present in the gap of about 1.0 mm.

[0061] In Figure 4 the graph, the vertical axis represents the temperature (°C) of the spinning nozzle 21, and the horizontal axis represents the time (min) that elapses from when the spinning assembly 2 is mounted to the heating case 3. Further, the thick solid line represents the temperature measured at the central portion of the lower surface of the spinning nozzle 21 of the embodiment, and the thick dashed line represents the temperature measured at the central portion of the lower surface of the spinning nozzle 21 of the comparative example. Furthermore, the thin solid line represents the average temperature measured at the side surface of the spinning nozzle 21 of the embodiment, and the thin dashed line represents the average temperature measured at the side surface of the spinning nozzle 21 of the comparative example.

[0062] As Figure 4 is shown, compared with the spinning nozzle 21 of the comparative example, the temperature of the central portion of the lower surface of the spinning nozzle 21 of the embodiment is less reduced after the spinning assembly 2 is mounted to the heating case 3. Further, after about 3 min elapses from when measurement is started, after the state in which the cooling case 6 abuts against the lower surface of the heating case 3 via the seal 7 is reached, the temperature of the central portion of the lower surface of the spinning nozzle 21 of the embodiment rapidly rises, but the temperature of the central portion of the lower surface of the spinning nozzle 21 of the comparative example slowly and gently rises. Regarding the temperature of the side surface of the spinning nozzle 21, compared with the spinning nozzle 21 of the comparative example, the temperature of the spinning nozzle 21 of the embodiment is less changed after the spinning assembly 2 is mounted to the heating case 3, and the temperature hardly decreases.

[0063] (EFFECTS OF THE FIRST EMBODIMENT)

[0064] As above, the melt spinning device 1 of the present embodiment is provided with: the spinning assembly 2 of a cylindrical shape having the spinning nozzle 21; the heating case 3 having the recessed portion 32 into which the spinning assembly 2 is inserted and which is open downward; and the heat conduction mechanism 4 having the divided members 42 which are in contact with the outer peripheral surface of the spinning assembly 2 inserted into the recessed portion 32 and which are divided into four moving blocks 43 in the circumferential direction of the spinning assembly 2. Also, when the spinning assembly 2 is inserted into the recessed portion 32, the heat conduction path from the wall surface of the heating case 3 which divides the recessed portion 32 to the outer peripheral surface of the spinning assembly 2 is constituted by the members possessed by the heat conduction mechanism 4 including the divided members 42.

[0065] Thus, the heat from the heating case 3 can be transferred to the spinning assembly 2 through the heat conduction path constituted by the members possessed by the heat conduction mechanism 4 including the divided members 42. Therefore, compared to the case where the heat from the heating case 3 is transferred to the spinning assembly 2 via the air layer, the efficiency of the supply of the heat from the heating case 3 to the spinning assembly 2 can be improved. Further, the divided members 42 are divided into a plurality in the circumferential direction of the spinning assembly 2, and thus the contact between the spinning assembly 2 and the divided members 42 is difficult to be in a one-sided contact state. Therefore, the supply of the heat to the spinning assembly 2 can be inhibited from becoming uneven in the circumferential direction.

[0066] In the melt spinning device 1 of the present embodiment, the divided members 42 (moving blocks 43) are in contact with the range A in which the spinning nozzle 21 is disposed in the axial direction (up-down direction) of the spinning assembly 2 in the outer peripheral surface of the spinning assembly 2 inserted into the recessed portion 32. Thus, the heat from the heating case 3 can be easily transferred to the portion in which the spinning nozzle 21 is disposed in the outer peripheral surface of the spinning assembly 2 by the heat conduction mechanism 4. Therefore, the reduction in the thread quality due to the lower temperature of the spinning nozzle 21 can be prevented.

[0067] In the melt spinning device 1 of the present embodiment, the heat conduction mechanism 4 is further provided with the first inclined surface 41a which is located at a position opposite to the spinning assembly 2 with the divided members 42 interposed therebetween and which is inclined in such a manner that the upper end is located closer to the outer peripheral surface of the spinning assembly 2 than the lower end. The divided members 42 (moving blocks 43) have the second inclined surface 43a which is of the same inclination angle as the first inclined surface 41a, and the divided members 42 are configured to be movable in the up-down direction in a state in which the second inclined surface 43a is in contact with the first inclined surface 41a. Thus, the divided members 42 (moving blocks 43) are movable in the direction closer to the outer peripheral surface of the spinning assembly 2 and in the direction farther from the outer peripheral surface of the spinning assembly 2 by moving in the up-down direction in a state in which the second inclined surface 43a thereof is in contact with the first inclined surface 41a. Therefore, the divided members 42 (moving blocks 43) can be brought into contact with the outer peripheral surface of the spinning assembly 2 regardless of the size of the gap between the heating case 3 and the spinning assembly 2.

[0068] In the melt spinning device 1 of the present embodiment, the partition member 42 (the moving block 43) is positioned below the first inclined surface 41a. Thus, by arranging the partition member 42 (the moving block 43) below the first inclined surface 41a, the assembly of the heat transfer mechanism 4 can be easily performed.

[0069] In the melt spinning device 1 of the present embodiment, the heat transfer mechanism 4 further includes a fixing member 41 which is installed to a wall surface in the heating case 3 which divides the recessed portion 32 and which has the first inclined surface 41a, and the partition member 42 (the moving block 43) is fixed to the fixing member 41 (the first inclined surface 41a) by a bolt 45. Thus, the partition member 42 (the moving block 43) can be fastened and fixed to the fixing member 41 by the bolt 45, and thus the contact pressure between the partition member 42 (the moving block 43) and the spinning assembly 2 can be increased. Therefore, the efficiency of the supply of heat from the heating case 3 to the spinning assembly 2 can be further increased.

[0070] In the melt spinning device 1 of the present embodiment, the lower surface of the fixing member 41 is covered by a heat insulating member 46a. Thus, by the heat insulating member 46a, the heat dissipation from the lower surface of the fixing member 41 which is in contact with the outside air can be suppressed. Therefore, the efficiency of the supply of heat from the heating case 3 to the spinning assembly 2 can be further increased.

[0071] In the melt spinning device 1 of the present embodiment, the lower surface of the partition member 42 (the moving block 43) is covered by a heat insulating member 46b. Thus, by the heat insulating member 46b, the heat dissipation from the lower surface of the partition member 42 (the moving block 43) which is in contact with the outside air can be suppressed. Therefore, the efficiency of the supply of heat from the heating case 3 to the spinning assembly 2 can be further increased.

[0072] <2nd Embodiment>

[0073] Next, the melt spinning device 101 of the 2nd embodiment of the present application will be described with reference to Figure 5 The melt spinning device 101 of the present embodiment has the same configuration as that of the melt spinning device 1 of the 1st embodiment except for the heat transfer mechanism 104. In the following description, the same symbols as those of the 1st embodiment are used for the same configuration elements as those of the 1st embodiment, and the description thereof will be omitted.

[0074] The heat conduction mechanism 104 of the present embodiment differs from the heat conduction mechanism 4 of the first embodiment mainly in the positional relationship of the fixed member 141 and the partition member 142. That is, in the heat conduction mechanism 4 of the first embodiment, the partition member 42 is positioned below the first inclined surface 41a of the fixed member 41, but in the heat conduction mechanism 104 of the present embodiment, the partition member 142 is positioned above the first inclined surface 141a of the fixed member 141.

[0075] The first inclined surface 141a of the fixed member 141 is inclined in such a manner that the lower end thereof is positioned closer to the outer peripheral surface of the spinning pack 2 than the upper end. The lower surface of the fixed member 141 is covered with a heat insulating member 146a such as a ceramic fiber mat.

[0076] Four first threaded holes 141b and second threaded holes 141c are formed in the fixed member 141. The first threaded holes 141b and the second threaded holes 141c each extend in the vertical direction and penetrate the fixed member 141. The first threaded holes 141b and the second threaded holes 141c are open on the first inclined surface 141a. The four first threaded holes 141b and the second threaded holes 141c are provided in correspondence with the four moving blocks 143 that constitute the partition member 142 described later. The first threaded holes 141b are provided at positions closer to the heating case 3 than the second threaded holes 141c in the gap between the heating case 3 and the spinning pack 2 inserted into the recess 32.

[0077] A bolt 145a is inserted into the first threaded hole 141b from below. A bolt 145b is inserted into the second threaded hole 141c from below. As described later in detail, a push-up member 145c for pushing up the moving block 143 is attached to the front end portion of the bolt 145b. In the present embodiment, the upper end surface of the push-up member 145c is an inclined surface having the same inclination angle as the third inclined surface 143c of the moving block 143. The upper end surface of the push-up member 145c can also be a horizontal surface.

[0078] The partition member 142 is constituted by the four moving blocks 143 arranged in the circumferential direction of the spinning pack 2 inserted into the recess 32. The moving block 143 has a second inclined surface 143a having the same inclination angle as the first inclined surface 141a of the fixed member 141. The moving block 143 is movable in the vertical direction in a state in which the second inclined surface 143a is in contact with the first inclined surface 141a of the fixed member 141. A recess 143d open downward is formed in the second inclined surface 143a.

[0079] The movable block 143 has a contact surface 143b that can contact the outer peripheral surface of the spinning assembly 2 inserted into the recess 32. Furthermore, the movable block 143 has a third inclined surface 143c, which is inclined such that its upper end is positioned closer to the outer peripheral surface of the spinning assembly 2 than its lower end. The third inclined surface 143c faces obliquely downwards, connecting the second inclined surface 143a to the contact surface 143b. The third inclined surface 143c is covered, for example, by a heat-insulating member 146b such as ceramic fiber felt.

[0080] like Figure 5 As shown in (a), when the spinning assembly 2 is not inserted into the recess 32, the front end of the bolt 145a, which engages with the first threaded hole 141b, is located within the recess 143d formed on the moving block 143. This prevents the moving block 143 from sliding and falling off on the first inclined surface 141a of the fixing member 141.

[0081] like Figure 5 As shown in (b), after the spinning assembly 2 is inserted into the recess 32, the bolt 145a is loosened so that the front end of the bolt 145a is located in the first threaded hole 141b, thereby causing the moving block 143 to move downward by its own weight. Then, the moving block 143 comes into contact with the outer peripheral surface of the spinning assembly 2 inserted into the recess 32 by its contact surface 143b. At this time, the fixing member 141 and the moving block 143 form a heat conduction path from the wall surface dividing the recess 32 in the heating box 3 to the outer peripheral surface of the spinning assembly 2.

[0082] like Figure 5 As shown in (c), when the spinning assembly 2 is removed from the recess 32, the bolt 145b is tightened first. This causes the upper end face of the pusher 145c mounted on the bolt 145b to contact the third inclined surface 143c of the moving block 143, pushing the moving block 143 upwards. Then, the moving block 143 is separated from the outer peripheral surface of the spinning assembly 2 inserted into the recess 32 by its contact surface 143b. Afterwards, as... Figure 5 As shown in (a), the bolt 145a is tightened so that the front end of the bolt 145a is located in the recess 143d of the moving block 143, and the spinning assembly 2 is taken out from the recess 32.

[0083] (Effects of the second implementation method)

[0084] According to the present embodiment, in addition to the effects based on the same configuration as the first embodiment, the following effects can be obtained. In the melt spinning device 101 of the present embodiment, the first inclined surface 141a is inclined so that the lower end is located closer to the outer circumferential surface of the spinning pack 2 than the upper end, and the dividing member 142 (the moving block 143) is located above the first inclined surface 141a. Thus, the dividing member 142 (the moving block 143) moves downward by its own weight and reliably comes into contact with the outer circumferential surface of the spinning pack 2.

[0085] <3RD EMBODIMENT>

[0086] Next, the melt spinning device 201 of the third embodiment of the present application will be described with reference to Figure 6 The melt spinning device 201 of the present embodiment has substantially the same configuration as the melt spinning device 1 of the first embodiment except for the heat transfer mechanism 204. In the following description, the same reference numerals are used for the same components as those of the first embodiment, and the description thereof will be omitted.

[0087] The heat transfer mechanism 204 of the present embodiment differs from the heat transfer mechanism 4 of the first embodiment mainly in the configuration for lifting the moving block 243 (the dividing member 242). That is, in the heat transfer mechanism 4 of the first embodiment, the moving block 43 (the dividing member 42) is moved upward by the tightening bolt 45, but in the heat transfer mechanism 204 of the present embodiment, the moving block 243 (the dividing member 242) is lifted upward by the insertion member 248.

[0088] Like the heat transfer mechanism 4 of the first embodiment, the heat transfer mechanism 204 has the fixed member 241 whose lower surface is covered with the heat insulating member 246a and the dividing member 242 whose lower surface is covered with the heat insulating member 246b and is divided into four moving blocks 243. Further, the heat transfer mechanism 204 has the spring 247 installed to the lower surface of each moving block 243 and the disc-shaped insertion member 248 inserted into the lower end portion of the recess 32.

[0089] By inserting the insertion member 248 into the lower end portion of the recess 32, the moving block 243 is lifted upward via the spring 247 installed to the lower surface of the moving block 243. Then, the moving block 243 moves upward in a state where the second inclined surface 243a thereof is in contact with the first inclined surface 241a of the fixed member 241, and becomes in a state where the contact surface 243b is in contact with the outer circumferential surface of the spinning pack 2.

[0090] An external thread 248a is formed on the outer peripheral surface of the insert member 248. Furthermore, an internal thread 232b is formed at the lower end of the wall surface that divides the recess 32. By engaging the external thread 248a of the insert member 248 with the internal thread 232b of the wall surface that divides the recess 32, the insert member 248 can be inserted into the lower end of the recess 32. Additionally, a circular opening 248b is formed in the center of the insert member 248 to expose the spinning spinneret 21 to the outside. The diameter D2 of the opening 248b is larger than the diameter D1 of the spinning assembly 2. Therefore, when loosening the insertion of the insert member 248, the spinning assembly 2 can be assembled and disassembled without removing the insert member 248 from the lower end of the recess 32. The insert member 248 can be made of materials with high thermal conductivity, such as aluminum alloy, copper alloy, ordinary steel, alloy steel, special steel, carbon fiber composite material, or silicone rubber. The lower surface of the embedded component 248 is covered, for example, by a thermal insulation component 246c such as ceramic fiber felt.

[0091] (Effects of the third embodiment)

[0092] According to this embodiment, in addition to the effects based on the same configuration as in the first embodiment, the following effects can also be obtained. In the melt spinning apparatus 201 of this embodiment, when the inserting member 248 is inserted into the lower end of the recess 32, an upward force is applied to the moving block 243 by the spring 247. Therefore, the moving block 243 (segmenting member 242) can reliably contact the outer peripheral surface of the spinning assembly 2.

[0093] <Fourth Implementation>

[0094] Next, refer to Figure 7 The melt spinning apparatus 301 according to the fourth embodiment of the present invention will be described. The configuration of the melt spinning apparatus 301 of this embodiment is substantially the same as that of the melt spinning apparatus 1 of the first embodiment, except for the heat conduction mechanism 304. In the following description, components identical to those in the first embodiment will be labeled with the same symbols as in the first embodiment and will be omitted from the description.

[0095] The main difference between the heat conduction mechanism 304 of this embodiment and the heat conduction mechanism 4 of the first embodiment lies in the structure for moving the movable block 343 (segmenting member 342). Specifically, in the heat conduction mechanism 4 of the first embodiment, the movable block 43 is moved vertically with its second inclined surface 43a in contact with the first inclined surface 41a of the fixed member 41, thereby moving the movable block 43 towards the spinning assembly 2 and away from the spinning assembly 2. On the other hand, in the heat conduction mechanism 304 of this embodiment, the movable block 343 (segmenting member 342) is supported by a compression coil spring, i.e., a spring 341, which extends and retracts in the direction towards and away from the spinning assembly 2.

[0096] The spring 341 is correspondingly arranged with each moving block 343 of the dividing component 342. The spring 341 and the dividing component 342 are preferably made of materials with high thermal conductivity, such as aluminum alloy, copper alloy, ordinary steel, alloy steel, special steel, carbon fiber composite material, silicone rubber, etc. The materials of the spring 341 and the dividing component 342 only need to be materials with a thermal conductivity at least higher than that of a non-flowing air layer.

[0097] One end of the spring 341 is mounted on the surface of the movable block 343 opposite to the heating chamber 3. The spring 341 is detachably mounted relative to the heating chamber 3 in such a way that its other end, which is mounted on the opposite side of the movable block 343, contacts the wall surface of the heating chamber 3 that divides the recess 32.

[0098] Spring 341 is disposed in a recess 332a at the lower end of the wall surface that divides the recess 32 in the heating chamber 3. Contact surface 343b of moving block 343 is located outside the recess 332a. The length of the heat conduction mechanism 304 in the thickness direction of the gap, when no external force is applied to moving block 343, is greater than the gap G between the wall surface that divides the recess 32 in the recess 332a and the outer peripheral surface of the spinning assembly 2 (refer to...). Figure 7 The size of (b)). The wall surface dividing the recess 332a consists of a bottom surface facing the outer periphery of the spinning assembly 2 inserted into the recess 32 and side surfaces located at both ends of the bottom surface in the vertical direction. The upper and lower surfaces of the moving block 343 are in contact with the two side surfaces of the recess 332a. That is, the length of the moving block 343 in the vertical direction is approximately equal to the length of the recess 332a in the vertical direction.

[0099] The movable block 343 has an inclined surface 343a. The inclined surface 343a is in the thickness direction of the gap of the movable block 343 ( Figure 7 The inclined surface 343a is formed on the lower surface of the portion opposite to the side where the spring 341 is installed, in the left-right direction of (a) and (b). The inclined surface 343a is inclined such that its upper and lower ends are closer to the heating chamber 3 than its upper end in the thickness direction of the gap. The inclined surface 343a is covered by the heat insulation member 346b.

[0100] like Figure 7 As shown in (a), when the spinning assembly 2 is inserted into the recess 32 from below, the upper end of the spinning assembly 2 abuts against the inclined surface 343a of the moving block 343. With the upper end of the spinning assembly 2 abutting against the inclined surface 343a of the moving block 343, the moving block 343 moves toward the heating chamber 3 by pushing up the spinning assembly 2, and the spring 341 contracts.

[0101] like Figure 7As shown in (b), when the spinning assembly 2 is fully inserted into the recess 32, the contact surface 343b of the moving block 343 contacts the outer peripheral surface of the spinning assembly 2. More specifically, the contact surface 343b of the moving block 343 contacts the area on the outer peripheral surface of the spinning assembly 2 inserted into the recess 32 where the spinning spinneret 21 is arranged in the vertical direction. The spring 341 contracts according to the size of the gap between the wall dividing the recess 32 and the outer peripheral surface of the spinning assembly 2. The spring 341 applies a force to the moving block 343 in the direction toward the outer peripheral surface of the spinning assembly 2.

[0102] When the contact surface 343b of the moving block 343 contacts the outer peripheral surface of the spinning assembly 2, a heat conduction path is formed from the wall surface dividing the recess 32 in the heating chamber 3 to the outer peripheral surface of the spinning assembly 2 via the spring 341 and the moving block 343. Thus, heat from the heating chamber 3 is transferred to the moving block 343 from both sides of the recess 332a that contacts the upper and lower surfaces of the moving block 343. Furthermore, heat from the heating chamber 3 is also transferred to the moving block 343 via the spring 341. Finally, the heat transferred to the moving block 343 is transferred to the spinning assembly 2 that contacts the moving block 343.

[0103] (Effects of the third embodiment)

[0104] According to this embodiment, in addition to the effects based on the same configuration as in the first embodiment, the following effects can also be obtained. In the melt spinning apparatus 301 of this embodiment, the spring 341 applies a force to the moving block 343 in the direction toward the outer peripheral surface of the spinning assembly 2, thereby enabling the dividing member 342 (moving block 343) to reliably contact the spinning assembly 2.

[0105] (Modified Example)

[0106] The embodiments of the present invention have been described above based on the accompanying drawings, but it should be understood that the specific configuration is not limited to these embodiments. The scope of the present invention is defined not by the description of the above embodiments but by the scope of the patent claims, and also includes all modifications within the scope and with equivalent meaning to the scope of the patent claims.

[0107] In the above embodiment, the case where the dividing members 42 (142, 242, 342) are divided into four parts in the circumferential direction of the spinning assembly 2 has been described, but it is not limited to this. The dividing members 42 (142, 242, 342) can be divided into two or more parts.

[0108] Furthermore, in the above embodiment, it is described that the entire contact surface 43b (143b, 243b, 343b) of the dividing members 42 (142, 242, 342) contacts the area A on the outer peripheral surface of the spinning assembly 2 where the spinning spinneret 21 is arranged in the axial (vertical direction) direction of the spinning assembly 2, but it is not limited to this. It is also possible that a part of the contact surface 43b (143b, 243b, 343b) of the dividing members 42 (142, 242, 342) contacts the area A, or that the entire dividing members 42 (142, 242, 342) contacts areas outside the area A.

[0109] Furthermore, in the above embodiment, the case where the fixing member 41 (141, 241) having the first inclined surface 41a (141a, 241a) is installed on the wall surface that divides the recess 32 in the heating chamber 3 is described, but it is not limited to this. The first inclined surface 41a (141a, 241a) may also be formed in the heating chamber 3.

[0110] Furthermore, in the above embodiment, the lower surface of the fixing member 41 (141, 241) is covered by the heat insulation member 46a (146a, 246a). Additionally, the lower surface of the dividing member 42 (142, 242, 342) is covered by the heat insulation member 46b (146b, 246b, 346b). However, these heat insulation members 46a (146a, 246a) and 46b (146b, 246b, 346b) may not be present. Alternatively, only one of the heat insulation members 46a (146a, 246a) and 46b (146b, 246b, 346b) may be provided.

[0111] In the second embodiment described above, it was explained that when the spinning assembly 2 is removed from the recess 32, the moving block 143 is pushed up by the pushing member 145c mounted on the bolt 145b, but it is not limited to this. That is, the pushing member 145c may not be provided, and the moving block 143 may be pushed up by the front end of the bolt 145b.

[0112] In the third embodiment described above, an external thread 248a is formed on the outer peripheral surface of the insert member 248, and an internal thread 232b that engages with the external thread 248a is formed at the lower end of the wall surface that divides the recess 32, but this is not a limitation. That is, for example, an external thread may be formed on the outer peripheral surface of the spinning assembly 2, and an internal thread that engages with the external thread may be formed on the inner peripheral surface of the insert member 248.

[0113] In the fourth embodiment described above, the case where the upper and lower surfaces of the movable block 343 are in contact with the two sides of the recess 332a is explained, but it is not limited to this. That is, the length of the movable block 343 in the vertical direction may be made sufficiently smaller than the length of the recess 332a in the vertical direction, so that the upper and lower surfaces of the movable block 343 are separated from the two sides of the recess 332a. In this case, it is preferable that not only the inclined surface 343a of the movable block 343 but also the lower surface is covered by a heat-insulating member.

[0114] In the above embodiment, it was described that when the four moving blocks 43 (143, 243, 343) are in contact with the outer peripheral surface of the spinning assembly 2, the dividing member 42 (142, 242, 342) surrounds the spinning assembly 2 almost completely around its circumference, but this is not a limitation. That is, when the four moving blocks 43 (143, 243, 343) are in contact with the outer peripheral surface of the spinning assembly 2, gaps may also be formed between adjacent moving blocks 43 (143, 243, 343). Furthermore, the contact surfaces 43b (143b, 243b, 343b) of the four moving blocks 43 (143, 243, 343) do not necessarily have to be in contact with the outer peripheral surface of the spinning assembly 2. That is, it is sufficient for only a portion of the contact surfaces 43b (143b, 243b, 343b) to be in contact with the outer peripheral surface of the spinning assembly 2.

Claims

1. A melt spinning apparatus, characterized in that, have: A cylindrical spinning assembly with a spinning spinneret; The heating chamber has an internal space for inserting the aforementioned spinning assembly and a downward-facing recess; and The heat conduction mechanism has a dividing member that can contact the outer peripheral surface of the spinning assembly inserted into the recess and is divided into multiple parts in the circumferential direction of the spinning assembly. When the spinning assembly is inserted into the recess, a heat conduction path is formed from the wall surface that divides the recess in the heating chamber to the outer peripheral surface of the spinning assembly through the components of the heat conduction mechanism, which includes at least the dividing member. The aforementioned heat conduction mechanism also includes a first inclined surface, which is located on the opposite side of the aforementioned spinning assembly, separated from the aforementioned dividing member, and is inclined such that one end of the inclined surface is closer to the outer peripheral surface of the aforementioned spinning assembly than the other end. The aforementioned dividing member has a second inclined surface with the same inclination angle as the first inclined surface, and the dividing member is configured to move in the vertical direction while the second inclined surface is in contact with the first inclined surface. The first inclined surface is inclined such that its upper end is located closer to the outer peripheral surface of the spinning assembly than its lower end. The aforementioned segmented component is located below the aforementioned first inclined surface. The aforementioned segment is fixed to the first inclined surface by bolts.

2. A melt spinning apparatus, characterized in that, have: A cylindrical spinning assembly with a spinning spinneret; The heating chamber has an internal space for inserting the aforementioned spinning assembly and a downward-facing recess; and The heat conduction mechanism has a dividing member that can contact the outer peripheral surface of the spinning assembly inserted into the recess and is divided into multiple parts in the circumferential direction of the spinning assembly. When the spinning assembly is inserted into the recess, a heat conduction path is formed from the wall surface that divides the recess in the heating chamber to the outer peripheral surface of the spinning assembly through the components of the heat conduction mechanism, which includes at least the dividing member. The aforementioned heat conduction mechanism also includes a first inclined surface, which is located on the opposite side of the aforementioned spinning assembly, separated from the aforementioned dividing member, and is inclined such that one end of the inclined surface is closer to the outer peripheral surface of the aforementioned spinning assembly than the other end. The aforementioned dividing member has a second inclined surface with the same inclination angle as the first inclined surface, and the dividing member is configured to move in the vertical direction while the second inclined surface is in contact with the first inclined surface. The first inclined surface is inclined such that its upper end is located closer to the outer peripheral surface of the spinning assembly than its lower end. The aforementioned segmented component is located below the aforementioned first inclined surface. The aforementioned heat conduction mechanism also includes a force-applying component that applies an upward force to the aforementioned segmented components.

3. A melt spinning apparatus, characterized in that, have: A cylindrical spinning assembly with a spinning spinneret; The heating chamber has an internal space for inserting the aforementioned spinning assembly and a downward-facing recess; and The heat conduction mechanism has a dividing member that can contact the outer peripheral surface of the spinning assembly inserted into the recess and is divided into multiple parts in the circumferential direction of the spinning assembly. When the spinning assembly is inserted into the recess, a heat conduction path is formed from the wall surface that divides the recess in the heating chamber to the outer peripheral surface of the spinning assembly through the components of the heat conduction mechanism, which includes at least the dividing member. The aforementioned heat conduction mechanism also includes a first inclined surface, which is located on the opposite side of the aforementioned spinning assembly, separated from the aforementioned dividing member, and is inclined such that one end of the inclined surface is closer to the outer peripheral surface of the aforementioned spinning assembly than the other end. The aforementioned dividing member has a second inclined surface with the same inclination angle as the first inclined surface, and the dividing member is configured to move in the vertical direction while the second inclined surface is in contact with the first inclined surface. The first inclined surface is inclined such that its lower end is located closer to the outer peripheral surface of the spinning assembly than its upper end. The aforementioned segment is located above the aforementioned first inclined surface. A downward-opening inclined recess is formed on the second inclined surface mentioned above. A threaded hole extending in the vertical direction and penetrating the component is formed on the component having the first inclined surface described above. The bolt is inserted into the threaded hole from below. When the front end of the bolt is located in the inclined recess, the dividing member is separated from the outer peripheral surface of the spinning assembly. When the front end of the bolt is located in the threaded hole, the dividing member moves downward by its own weight and comes into contact with the outer peripheral surface of the spinning assembly.

4. The melt spinning apparatus according to any one of claims 1 to 3, characterized in that, The aforementioned heat transfer mechanism also has: A fixing component, mounted in the heating chamber, is a wall surface that divides the recess and has the first inclined surface; and The first heat insulation component covers the lower surface of the aforementioned fixing component.

5. A melt spinning apparatus, characterized in that, have: A cylindrical spinning assembly with a spinning spinneret; The heating chamber has an internal space for inserting the aforementioned spinning assembly and a downward-facing recess; and The heat conduction mechanism has a dividing member that can contact the outer peripheral surface of the spinning assembly inserted into the recess and is divided into multiple parts in the circumferential direction of the spinning assembly. When the spinning assembly is inserted into the recess, a heat conduction path is formed from the wall surface that divides the recess in the heating chamber to the outer peripheral surface of the spinning assembly through the components of the heat conduction mechanism, which includes at least the dividing member. The aforementioned segment is supported by springs that extend and retract in the direction approaching and away from the aforementioned spinning assembly.

6. The melt spinning apparatus according to any one of claims 1 to 5, characterized in that, The aforementioned dividing member contacts the area on the outer peripheral surface of the aforementioned spinning assembly, which is inserted into the aforementioned recess, where the aforementioned spinning spinneret is arranged axially in the aforementioned spinning assembly.

7. The melt spinning apparatus according to any one of claims 1 to 6, characterized in that, The aforementioned heat conduction mechanism also includes a second heat insulation component that covers the lower surface of the aforementioned segmented component.

Images