Melt spinning device

Abstract

The present invention relates to a melt spinning device that improves the efficiency of supplying heat from the heating box to the spinning assembly regardless of the size of the gap between the heating box and the spinning assembly. The melt spinning device (1) comprises: a cylindrical spinning assembly (2) having a spinning nozzle (21); a heating box (3) having a recess (32) with an internal space for inserting the spinning assembly (2) and opening downward; and a heat transfer mechanism (4) having a leaf spring (41). When the spinning assembly (2) is inserted into the recess (32), the leaf spring (41) is located in the gap between the wall surface that divides the recess (32) and the surface of the spinning assembly (2), and can be elastically deformed according to the size of the gap. When the spinning assembly (2) is inserted into the recess (32), a heat conduction path from the wall surface that divides the recess (32) in the heating box (3) to the surface of the spinning assembly (2) is formed by the leaf spring (41).

Description

Technical Field

[0001] The present invention relates to a melt spinning device for spinning polymers. Background Art

[0002] Generally, a melt spinning device comprises a heating box heated to a temperature above the melting point of the polymer and a spinning pack detachably attached to the heating box. In the melt spinning device, the molten polymer is supplied to the spinning pack via a polymer flow path formed within the heating box and spun out from the spinning nozzle of the spinning pack.

[0003] For example, as shown in Patent Document 1, a downwardly open recessed portion is formed in a heating box for inserting a spin pack. A pack mounting portion is provided within the recessed portion to mount the spin pack. When the spin pack is mounted in the pack mounting portion, heat from the heating box is supplied to the spin pack.

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2012-102435

[0005] There is a gap of approximately 1 mm between the heating box and the spin pack—more specifically, between the wall of the heating box that defines the recessed area where the pack is mounted and the surface of the spin pack mounted on the heating box. Therefore, heat from the heating box is transferred to the spin pack via the air layer in this gap. Because the air layer has a relatively high thermal resistance, sufficient heat from the heating box is not transferred to the spin pack.

[0006] Furthermore, the size of the gap between the heating box and the spin pack varies due to component manufacturing errors and other factors. Consequently, heat transfer from the heating box to the spin pack becomes uneven, causing temperature variations within the spin pack. Furthermore, this uneven gap size makes it difficult to fill the gap between the heating box and the spin pack with components of defined dimensions. Summary of the Invention

[0007] An object of the present invention is to provide a melt spinning apparatus capable of improving the efficiency of supplying heat from a heating box to a spinning pack regardless of the size of a gap between the heating box and the spinning pack.

[0008] The melt spinning device of the first invention is characterized in that it comprises: a spinning assembly having a spinning spinneret; a heating box having a recess with an internal space for inserting the above-mentioned spinning assembly and opening toward the bottom; and a heat transfer mechanism having a deforming member, when the above-mentioned spinning assembly is inserted into the above-mentioned recess, the deforming member is located in the gap between the wall surface dividing the above-mentioned recess and the surface of the above-mentioned spinning assembly, and can be elastically deformed according to the size of the above-mentioned gap. When the above-mentioned spinning assembly is inserted into the above-mentioned recess, a heat conduction path from the wall surface dividing the above-mentioned recess in the above-mentioned heating box to the surface of the above-mentioned spinning assembly is formed by the components of the above-mentioned heat transfer mechanism including at least the above-mentioned deforming member.

[0009] In the present invention, heat from the heating box can be transferred to the spin pack via a heat conduction path formed by the components of the heat transfer mechanism. This improves the efficiency of heat supply from the heating box to the spin pack, compared to a case where heat from the heating box is transferred to the spin pack via an air layer. Furthermore, temperature variations within the spin pack can be suppressed. Furthermore, the heat transfer mechanism includes a deformable member that elastically deforms according to the size of the gap between the heating box and the spin pack, thereby improving the efficiency of heat supply from the heating box to the spin pack, regardless of the size of the gap.

[0010] The melt spinning apparatus according to the second invention is characterized in that the heat transfer mechanism is attached to a wall surface of the heating box that partitions the recessed portion.

[0011] The spin pack is often removed from the heating box for maintenance such as cleaning. If the heat transfer mechanism is attached to the spin pack, maintenance of the spin pack requires removing the heat transfer mechanism from the spin pack, complicating the maintenance work. In the present invention, the heat transfer mechanism is attached to the heating box, thus eliminating the need for complicated spin pack maintenance.

[0012] The melt spinning apparatus according to the third aspect of the present invention is characterized in that the heat transfer mechanism is detachably attached to a wall surface that partitions the recessed portion in the heating box.

[0013] In the present invention, when the polymer adheres to the wall surface that partitions the recess or the heat transfer mechanism, the heat transfer mechanism can be removed and cleaned.

[0014] The melt spinning apparatus according to the fourth invention is characterized in that the heat transfer mechanism further includes a contact portion that contacts a region in which the spinning nozzle is arranged in a vertical direction on the surface of the spinning pack inserted into the recess.

[0015] In the present invention, the contact portion of the heat transfer mechanism contacts the upper and lower areas of the surface of the spin pack inserted into the recess where the spinnerets are located. Thus, the heat transfer mechanism facilitates heat transfer from the heating box to the portion of the spin pack where the spinnerets are located. This prevents degradation of yarn quality caused by low spinneret temperatures.

[0016] The melt spinning apparatus according to the fifth invention is characterized in that a depression is formed on a wall surface of the heating box that defines the recessed portion, and a part of the heat transfer mechanism is disposed in the depression.

[0017] In the present invention, the recess can ensure sufficient space for arranging the heat transfer mechanism. In addition, in this specification, the wall surface that defines the "recess" is defined as a part of the wall surface that defines the concave portion.

[0018] The melt spinning device of the sixth invention is characterized in that the above-mentioned deformation member is a spring that is fixed to either one of the wall surface that divides the above-mentioned recess and the surface of the above-mentioned spinning assembly, and when the above-mentioned spinning assembly is inserted into the above-mentioned recess, it is elastically deformed by contacting the other of the wall surface that divides the above-mentioned recess and the surface of the above-mentioned spinning assembly.

[0019] In the present invention, the spring biasing force increases the contact pressure between the deforming member and the other of the wall surface defining the recess and the surface of the spin pack, thereby further improving the efficiency of heat supply from the heating box to the spin pack.

[0020] The melt spinning device of the seventh invention is characterized in that the above-mentioned deformation member is a linear component, one end of which is fixed to either the wall surface dividing the above-mentioned recess or the surface of the above-mentioned spinning assembly, and when the above-mentioned spinning assembly is inserted into the above-mentioned recess, it is elastically deformed by the other end thereof contacting the other of the wall surface dividing the above-mentioned recess and the surface of the above-mentioned spinning assembly.

[0021] In the present invention, there is no need to pursue precise dimensional design and component accuracy of the heat transfer mechanism, so the heat transfer mechanism can be designed and manufactured relatively easily.

[0022] The melt spinning device of the 8th invention is characterized in that the above-mentioned heat transfer mechanism also has a divided component divided into multiple parts in the circumferential direction of the above-mentioned spinning assembly, and the above-mentioned deforming member is a spring as follows: fixed to any one of the wall surface dividing the above-mentioned recess and the surface of the above-mentioned spinning assembly, when the above-mentioned spinning assembly is inserted into the above-mentioned recess, a force is applied to the above-mentioned divided component toward the other of the wall surface dividing the above-mentioned recess and the surface of the above-mentioned spinning assembly.

[0023] In the present invention, the spring biasing force can increase the contact pressure between the partition member and the other of the wall surface partitioning the recess and the surface of the spin pack, thereby further improving the efficiency of heat supply from the heating box to the spin pack.

[0024] The melt spinning device of the 9th invention is characterized in that a narrowing portion is formed between the bottom surface of the above-mentioned recess and the surface of the above-mentioned spinning assembly, and the gap gradually narrows from one side in the up and down direction to the other side. The above-mentioned heat transfer mechanism also has a dividing component, which is divided into multiple parts in the circumferential direction of the above-mentioned spinning assembly and constitutes the above-mentioned heat conduction path. The above-mentioned dividing component is arranged in the above-mentioned narrowing portion between the bottom surface of the above-mentioned recess and the surface of the above-mentioned spinning assembly, and contacts both sides of the bottom surface of the above-mentioned recess and the surface of the above-mentioned spinning assembly. The above-mentioned deforming member is a spring as follows: when the above-mentioned spinning assembly is inserted into the above-mentioned recess, a force is applied to the above-mentioned dividing component from the above-mentioned one side toward the above-mentioned other side in the up and down direction.

[0025] In the present invention, the partitioning members forming the heat conduction path are in contact with both the bottom surface of the recess and the surface of the spin pack. Furthermore, the heat conduction path formed by the partitioning members is the shortest distance from the wall surface dividing the recess to the surface of the spin pack. This further improves the efficiency of heat supply from the heating box to the spin pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of a melt spinning device according to a first embodiment of the present invention.

[0027] Figure 2 yes Figure 1 The enlarged view of the vicinity of the lower end portion of the recess in the heating box of the melt spinning apparatus shown is shown. (a) shows a state where the spinning pack is not inserted into the recess, and (b) shows a state where the spinning pack is inserted into the recess.

[0028] Figure 3 Yes Figure 1 FIG. 1 is a diagram showing springs attached to a wall surface that defines a recess in a heating box of a melt spinning device.

[0029] Figure 4 It is a graph showing the temperature change of the spinning nozzle in the melt spinning apparatus of the first embodiment and the comparative example.

[0030] Figure 5 It is a cross-sectional view of a recessed portion in a heating box of a melt spinning device according to a second embodiment of the present invention.

[0031] Figure 61 and 2 are cross-sectional views of a portion near the lower end of a recess in a heating box of a melt spinning apparatus according to a third embodiment of the present invention. (a) shows a state where a spinning pack is inserted into the recess, and (b) shows a state where the spinning pack is inserted into the recess.

[0032] Figure 7 yes Figure 6 A perspective view of the moving block is shown.

[0033] Figure 8 4. Cross-sectional views of the vicinity of the lower end portion of a recess in a heating box of a melt spinning apparatus according to a fourth embodiment of the present invention. (a) shows a state where a spinning pack is inserted into the recess, and (b) shows a state where the spinning pack is inserted into the recess.

[0034] Figure 9 It is a cross-sectional view of a recessed portion in a heating box of a melt spinning device according to a modified example of the second embodiment of the present invention.

[0035] Explanation of symbols

[0036] 1. 101. 201. 301. 401. Melt-spinning device; 2. Spinning assembly; 3. Heating box; 4. 104. 204. 304. 404. Heat transfer mechanism; 21. Spinning nozzle; 32. Recess; 32a. 132a. 232a. 332a. Recess; 41. Leaf spring (deformation member); 41c. Central portion (contact portion); 142. Bristles (deformation member, linear member); 142a. Front end portion (contact portion); 241. 341. Splitting member; 242a. 342a. Front end face (contact portion); 243. 343. Spring (deformation member); 308. Narrowing portion. DETAILED DESCRIPTION

[0037] <First embodiment>

[0038] First, refer to Figure 1 The overall structure of a melt spinning apparatus 1 according to a first embodiment of the present invention will be described. The melt spinning apparatus 1 mainly comprises a cylindrical spinning pack 2 having a spinning nozzle 21 , a heating box 3 having a recess 32 opening downward, a heat transfer mechanism 4 , and a cooling box 6 .

[0039] The concave portion 32 of the heating box 3 is provided with a pack mounting portion 31 to which the spinning pack 2 can be detachably mounted. The spinning pack 2 mounted on the pack mounting portion 31 is inserted into the inner space of the concave portion 32 with its axial direction in the vertical direction. The concave portion 32 is circular in plan view. Figure 1A plurality of recesses 32a are provided in a staggered manner in a direction perpendicular to the paper surface. A recess 32a is formed at the lower end of the wall surface that divides the recess 32. In addition, the wall surface that divides the recess 32a is defined as a part of the wall surface that divides the recess 32. The recess 32a is formed at equal intervals along the circumference of the recess 32 (refer to Figure 3 The recess 32a is open downward. A portion of the heat transfer mechanism 4 is disposed within the recess 32a. The gap between the outer peripheral surface of the spinning pack 2 inserted into the recess 32 and the portion of the wall defining the recess 32 other than the portion where the recess 32a is formed is approximately 1 mm.

[0040] Inside the heating box 3, multiple polymer flow paths 33 are provided, leading from a spinning pump (not shown) to a spin pack 2 mounted in a plurality of recesses 32. The assembly mounting portion 31 is secured to the bottom surface of the recess 32 by screws (not shown). The assembly mounting portion 31 includes a downwardly protruding connection portion 31a with external threads formed on its outer circumference. A through-hole 31b is formed in the assembly mounting portion 31, which terminates the polymer flow path 33.

[0041] Heating medium steam supplied from a heating medium boiler (not shown) is sealed in an internal space 3a of the heating box 3. The outer surface of the heating box 3 is covered with a heat insulating member 5 such as ceramic fiber felt.

[0042] The spin pack 2 includes an assembly component 23 having an internal space 2a formed therein. When the spin pack 2 is mounted on the assembly mounting portion 31, the internal space 2a is connected to the polymer flow path 33. A filter component 22 is disposed within the internal space 2a of the assembly component 23. A threaded mounting portion 23a is formed on the assembly component 23. The threaded mounting portion 23a is recessed from the upper surface of the assembly component 23 and has internal threads formed on the inner circumference corresponding to the external threads of the connecting portion 31a of the assembly mounting portion 31. The threaded mounting portion 23a can be threadedly mounted on the connecting portion 31a. Furthermore, an opening 23b is formed at the lower end of the assembly component 23, opening in the thickness direction and connecting the internal space 2a with the external space. The spinning spinneret 21 is embedded in this opening 23b.

[0043] The cooling box 6 is arranged below the heating box 3. A seal 7 is arranged on the upper surface of the cooling box 6. The cooling box 6 can be moved up and down by a driving mechanism (not shown) and can be in contact with the lower surface of the heating box 3 via the seal 7 ( Figure 1 state) and the state of being separated from the lower surface of the heating box body 3.

[0044] An opening 71 is formed on the sealing member 7 at a portion opposite to the recess 32 of the heating box 3. In addition, openings 61 and 62 are respectively formed on the upper wall and the lower wall of the cooling box 6 at portions opposite to the recess 32 of the heating box 3. Furthermore, the portion of the cooling box 6 opposite to the recess 32 of the heating box 3 becomes a yarn travel space 6a for the molten polymer spun from the spinning spinneret 21 to pass through. In the cooling box 6, the yarn travel space 6a is separated from other portions by a filter 63. Cooling air is pressurized into the cooling box 6 via a pipe (not shown). The cooling air pressurized into the cooling box 6 is pressurized into the yarn travel space 6a via the filter 63.

[0045] In the melt spinning apparatus 1 constructed as described above, heat medium steam is supplied from a heat medium boiler (not shown) to the interior space 3a of the heating box 3. The heat medium steam supplied to the interior space 3a of the heating box 3 heats the heating box 3 to a predetermined spinning temperature, which is above the melting point of the polymer. Subsequently, a plurality of spinning packs 2, preheated to the same temperature as the spinning temperature by a heater (not shown), are inserted into respective recesses 32 of the heating box 3 and mounted on the pack mounting portion 31. Heat from the heating box 3 is transferred to the spinning packs 2 mounted on the pack mounting portion 31 via a heat transfer mechanism 4.

[0046] Then, a high-temperature molten polymer such as nylon or polyester, fed from a spinning pump (not shown), is fed into the internal space 2a of the spin pack 2 via the polymer flow path 33. The molten polymer fed into the internal space 2a of the spin pack 2 is filtered by the filter element 22 and then spun out from the spinneret 21. The molten polymer spun out from the spinneret 21 passes through the yarn running space 6a within the cooling box 6. At this time, the molten polymer running in the yarn running space 6a is cooled by the cooling air that is pumped into the yarn running space 6a.

[0047] 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 arranged in the gap between the wall surface (more specifically, the bottom surface of the recess 32a) that defines the recess 32 formed in the heating box 3 and the spinning pack 2 inserted into the recess 32. In the following description, the gap between the wall surface that defines the recess 32 and the outer peripheral surface of the spinning pack 2 is defined in the thickness direction ( Figure 2 The left-right direction (a) and right-left direction (b)) of the gap is referred to as the "gap thickness direction." The heat transfer mechanism 4 is composed of a plurality of leaf springs 41. The leaf springs 41 are preferably made of a material with a high thermal conductivity. Examples include aluminum alloy, copper alloy, ordinary steel, alloy steel, special steel, carbon fiber composite material, and silicone rubber. The leaf springs 41 can be made of any material with a thermal conductivity at least higher than that of a stagnant air layer.

[0048] Each leaf spring 41 is removably embedded in a plurality of recesses 32a formed at the lower end of the wall that divides the recess 32. The leaf spring 41 is formed by folding back one end of a flat plate-shaped component, and is composed of a flat plate-shaped base portion 41a and a folded portion 41b. The folded portion 41b is connected to the lower end of the base portion 41a and folded back toward one side of the base portion 41a. The folded portion 41b is bent so that the central portion 41c in the up-down direction is farthest from the base portion 41a. The leaf spring 41 is mounted on the heating box 3 in such a manner that the back surface of the base portion 41a (the surface on the opposite side to the side folded back by the folded portion 41b) contacts the wall that divides the recess 32 in the heating box 3 (more specifically, the bottom surface of the recess 32a).

[0049] The base portion 41a of the leaf spring 41 is disposed within the recess 32a. The center portion 41c of the folded portion 41b of the leaf spring 41 is located outside the recess 32a. That is, the center portion 41c of the leaf spring 41 is located closer to the spinning pack 2 than the portion of the wall that defines the recess 32 where the recess 32a is not formed. The thickness T of the leaf spring 41 in the thickness direction of the gap when no external force is applied (see FIG. 1 ) is 0. Figure 2 (a)), is larger than the gap G between the wall surface of the recess 32a that divides the recess 32 and the outer peripheral surface of the spinning pack 2 (refer to Figure 2 The size of (b)).

[0050] like Figure 2 As shown in (b), when the spinning pack 2 is inserted into the recess 32, the central portion 41c of the folded portion 41b of the leaf spring 41 contacts the surface of the spinning pack 2. More specifically, the central portion 41c of the leaf spring 41 contacts the area A (see FIG. 1 ) on the outer peripheral surface of the spinning pack 2 inserted into the recess 32, where the spinning nozzle 21 is arranged in the vertical direction. Figure 2 (b)) contact. The central portion 41c of the leaf spring 41 corresponds to the contact portion of the present invention. When the central portion 41c of the leaf spring 41 contacts the surface of the spinning assembly 2, the leaf spring 41 elastically deforms according to the size of the gap between the wall surface that divides the recess 32 and the outer peripheral surface of the spinning assembly 2. Figure 2 As shown in (b), when the leaf spring 41 is elastically deformed, the upper end of the folded portion 41b comes into contact with the base portion 41a.

[0051] When the central portion 41c of the leaf spring 41 contacts the outer peripheral surface of the spinning assembly 2, a heat conduction path is formed through the leaf spring 41 from the wall surface that divides the recess 32 in the heating box 3 (more specifically, the bottom surface of the recess 32a) to the outer peripheral surface of the spinning assembly 2. As a result, the heat from the heating box 3 is first transferred to the base portion 41a that is in contact with the heating box 3. Then, the heat transferred to the base portion 41a is transferred to the folding portion 41b. Here, the lower end of the folding portion 41b is connected to the base portion 41a, and the upper end is in contact with the base portion 41a. Therefore, the heat of the base portion 41a is transferred to both the lower end and the upper end of the folding portion 41b. Finally, the heat transferred to the folding portion 41b is transferred to the spinning assembly 2 that is in contact with the central portion 41c of the folding portion 41b.

[0052] In the melt spinning device 1, it is necessary to regularly perform a so-called surface cleaning operation to remove foreign matter attached to the surface of the spinning nozzle 21. The molten polymer spun from the spinning nozzle 21 during the surface cleaning operation is discarded. Therefore, in order not to waste the molten polymer, the surface cleaning operation is sometimes performed in a state where the spinning of the molten polymer from the spinning nozzle 21 is stopped. During the surface cleaning operation, the cooling box 6 is moved downward so that the cooling box 6 is separated from the lower surface of the heating box 3 via the seal 7 instead of being in contact with the lower surface of the heating box 3 via the seal 7. After the surface cleaning operation, the cooling box 6 is moved upward so that the cooling box 6 is separated from the lower surface of the heating box 3 instead of being in contact with the lower surface of the heating box 3 via the seal 7. The spin pack 2 is preheated to a predetermined temperature before being attached to the heating box 3. However, the spinning head 21 is exposed to the outside air before the cooling box 6 abuts the lower surface of the heating box 3, causing the temperature of the spinning head 21 to drop. This drop in the temperature of the spinning head 21 can degrade the quality of the yarn spun when spinning of the molten polymer from the spinning head 21 is resumed after the surface cleaning operation. Therefore, it is desirable to quickly raise the temperature of the spinning head 21 after the surface cleaning operation.

[0053] Here, in Figure 4 The graphs show temperature changes of the spinning nozzle 21 in the melt spinning apparatuses of Examples and Comparative Examples. Figure 4 The graph specifically shows the temperature change of the spinning nozzle 21 after the spinning pack 2 is installed on the heating box 3.

[0054] In this embodiment, the leaf spring 41 of the melt spinning device 1 of the first embodiment is made of stainless steel. A comparative example melt spinning device has the same configuration as the melt spinning device 1 of the first embodiment, except that the heat transfer mechanism 4 is omitted and the recess 32a is not formed in the recess 32 of the heating box 3. In the comparative example melt spinning device, the gap between the wall defining the recess 32 and the outer peripheral surface of the spin pack 2 inserted into the recess 32 is approximately 1.0 mm. In the comparative example melt spinning device, heat from the heating box 3 is supplied to the spin pack 2 via the air layer existing in this approximately 1.0 mm gap.

[0055] exist Figure 4 In the graph, the vertical axis represents the temperature of the spinning head 21 (°C), and the horizontal axis represents the time (min) elapsed from the time the spinning pack 2 is attached to the heating box 3. The dotted line represents the temperature measured at the center of the lower surface of the spinning head 21 of the example, and the solid line represents the temperature measured at the center of the lower surface of the spinning head 21 of the comparative example.

[0056] like Figure 4 As shown, the temperature of the center portion of the lower surface of the spinning head 21 of the embodiment decreases more gradually after the spinning pack 2 is mounted on the heating box 3, compared to the spinning head 21 of the comparative example. Furthermore, approximately 10 minutes after the start of measurement, when the cooling box 6 is in contact with the lower surface of the heating box 3 via the seal 7, the temperature of the center portion of the lower surface of the spinning head 21 of the embodiment reaches 260°C after approximately 80 minutes. However, the temperature of the center portion of the lower surface of the spinning head 21 of the comparative example takes approximately 110 minutes to reach 260°C.

[0057] (Effects of the First Embodiment)

[0058] As described above, the melt spinning device 1 of this embodiment comprises: a cylindrical spinning assembly 2 having a spinning nozzle 21; a heating box 3 having an internal space for inserting the spinning assembly 2 and a recess 32 open to the bottom; and a heat transfer mechanism 4 having a leaf spring 41. When the spinning assembly 2 is inserted into the recess 32, the leaf spring 41 is located in the gap between the wall dividing the recess 32 and the surface of the spinning assembly 2, and can be elastically deformed according to the size of the gap. When the spinning assembly 2 is inserted into the recess 32, a heat conduction path is formed from the wall dividing the recess 32 in the heating box 3 to the surface of the spinning assembly 2 through the leaf spring 41.

[0059] Thus, heat from the heating box 3 can be transferred to the spin pack 2 via the heat conduction path formed by the leaf springs 41 included in the heat transfer mechanism 4. Consequently, compared to a case where heat from the heating box 3 is transferred to the spin pack 2 via an air layer, the efficiency of heat supply from the heating box 3 to the spin pack 2 can be improved. Furthermore, the occurrence of temperature unevenness within the spin pack 2 can be suppressed. Furthermore, because the leaf springs 41 elastically deform according to the size of the gap between the heating box 3 and the spin pack 2, the efficiency of heat supply from the heating box 3 to the spin pack 2 can be improved regardless of the size of the gap.

[0060] In the melt spinning apparatus 1 of this embodiment, the leaf spring 41 is attached to a wall surface that defines the recessed portion 32 in the heating box 3. The spin pack 2 is frequently removed from the heating box 3 for maintenance such as cleaning. If the leaf spring 41 is attached to the spin pack 2, maintenance of the spin pack 2 requires removal of the leaf spring 41 from the spin pack 2, complicating the maintenance work. In this embodiment, the leaf spring 41 is attached to the heating box 3, thereby avoiding complicating maintenance work on the spin pack 2.

[0061] In the melt spinning device 1 of this embodiment, the leaf spring 41 is detachably attached to the wall surface that defines the recess 32 in the heating box 3. Therefore, when polymer adheres to the wall surface that defines the recess 32 or the leaf spring 41, the leaf spring 41 can be removed and cleaned.

[0062] In the melt spinning device 1 of this embodiment, the recess 32a is formed on the wall of the heating box 3 that defines the recess 32, and the base 41a of the leaf spring 41 is disposed in the recess 32a. Therefore, the recess 32a ensures sufficient space for arranging the leaf spring 41.

[0063] In the melt spinning device 1 of this embodiment, the central portion 41c of the folded portion 41b of the leaf spring 41 contacts the vertically disposed area A of the surface of the spin pack 2 inserted into the recess 32, where the spinneret 21 is located. Thus, the leaf spring 41 facilitates heat transfer from the heating box 3 to the portion of the spin pack 2 where the spinneret 21 is located. Consequently, a decrease in yarn quality due to a low temperature of the spinneret 21 can be suppressed.

[0064] In the melt spinning device 1 of this embodiment, a leaf spring 41 is fixed to a wall surface defining the recess 32 (more specifically, the bottom surface of the recess 32a). When the spin pack 32 is inserted into the recess 32, the leaf spring 41 elastically deforms by contact with the outer peripheral surface of the spin pack 2. Consequently, the force of the leaf spring 41 increases the contact pressure between the outer peripheral surface of the spin pack 2 and the leaf spring 41. Consequently, the efficiency of heat supply from the heating box 3 to the spin pack 2 can be further improved.

[0065] <Second embodiment>

[0066] Next, refer to Figure 5 A melt spinning device 101 according to a second embodiment of the present invention will be described. The configuration of the melt spinning device 101 according to this embodiment is substantially the same as that of the melt spinning device 1 according to the first embodiment, except for the heat transfer mechanism 104. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and their description will be omitted.

[0067] In the first embodiment, a plurality of recesses 32a are formed at the lower end of the wall of the heating box 3 that defines the recess 32, and are evenly spaced along the circumference of the recess 32. In contrast, the recesses 132a of this embodiment are formed over the entire circumference of the recess 32.

[0068] The heat transfer mechanism 104 of this embodiment is brush-shaped, comprising a strip-shaped base member 141 and a large number of bristles 142 attached to one side of the strip-shaped base member 141. The base member 141 and the bristles 142 are preferably made of a material with a high thermal conductivity. Examples of these materials include aluminum alloy, copper alloy, ordinary steel, alloy steel, special steel, carbon fiber composite material, and silicone rubber. The base member 141 and the bristles 142 can be made of any material as long as their thermal conductivity is at least higher than that of a stagnant air layer.

[0069] The heat transfer mechanism 104 is removably mounted to the wall defining the recess 32 in the heating box 3 (more specifically, the bottom surface of the recess 132a) using bolts (not shown). The heat transfer mechanism 104 is mounted to the heating box 3 such that the surface of the base member 141 opposite the surface on which the bristles 142 are mounted contacts the wall defining the recess 32 in the heating box 3. Specifically, the end of the bristles 142 mounted on the side of the base member 141 is fixed to the wall defining the recess 32 via the base member 141. The heat transfer mechanism 104 is configured to completely surround the spinning pack 2 inserted into the recess 32.

[0070] The base member 141 of the heat transfer mechanism 104 is arranged in a recess 132a formed at the lower end of the wall that defines the recess 32 of the heating box 3. The front end 142a of the bristles 142 (the other end on the side opposite to the side mounted on the base member 141) is located outside the recess 132a. In other words, the front end 142a of the bristles 142 is positioned in the thickness direction of the gap closer to the spinning assembly 2 than the portion of the wall that defines the recess 32 where the recess 132a is not formed. The length of the heat transfer mechanism 104 in the thickness direction of the gap when no external force is applied to the bristles 142 is greater than the size of the gap G between the wall that defines the recess 32 in the recess 132a and the outer peripheral surface of the spinning assembly 2.

[0071] When the spin pack 2 is inserted into the recess 32, the tip 142a of the bristles 142 contacts the surface of the spin pack 2. More specifically, the tip 142a of the bristles 142 contacts an area A on the outer peripheral surface of the spin pack 2 inserted into the recess 32, where the spinning nozzle 21 is arranged in the vertical direction. In this embodiment, the tip 142a of all the bristles 142 contacts the area A on the outer peripheral surface of the spin pack 2. The tip 142a of the bristles 142 corresponds to the contact portion of the present invention. When the tip 142a of the bristles 142 contacts the surface of the spin pack 2, the bristles 142 are elastically deformed according to the size of the gap between the wall surface that divides the recess 32 and the outer peripheral surface of the spin pack 2.

[0072] When the tip 142a of the bristles 142 contacts the outer circumference of the spin pack 2, a heat conduction path is formed through the base member 141 and the bristles 142 from the wall defining the recess 32 in the heating box 3 (more specifically, the bottom surface of the recess 132a) to the outer circumference of the spin pack 2. As a result, heat from the heating box 3 is first transferred to the base member 141, which is in contact with the heating box 3. The heat transferred to the base member 141 is then transferred to the bristles 142 attached to the base member 141. Finally, the heat transferred to the bristles 142 is transferred to the spin pack 2, which is in contact with the bristles 142.

[0073] (Effects of the Second Embodiment)

[0074] According to this 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 this embodiment, there is no need to pursue precise dimensional design and component accuracy of the heat transfer mechanism 104, so the heat transfer mechanism 104 can be designed and manufactured relatively easily.

[0075] <Third embodiment>

[0076] Next, refer to Figure 6 (a), (b) and Figure 7 A melt spinning device 201 according to a third embodiment of the present invention will be described. The configuration of the melt spinning device 201 according to this embodiment is substantially the same as that of the melt spinning device 1 according to the first embodiment, except for the heat transfer mechanism 204. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and their description will be omitted.

[0077] In the first embodiment, a plurality of recesses 32a are formed at equal intervals along the circumference of the recess 32, formed at the lower end of the wall of the heating box 3 that defines the recess 32. Furthermore, the recesses 32a are open downward. On the other hand, the recesses 232a of this embodiment are formed along the entire circumference of the recess 32. Furthermore, the wall defining the recess 232a is composed of a bottom surface facing the outer circumference of the spinning pack 2 inserted into the recess 32, and side surfaces located at both ends of the bottom surface in the upper and lower directions. In other words, the recesses 232a are not open downward.

[0078] The heat transfer mechanism 204 of this embodiment includes a partition member 241 divided into a plurality of moving blocks 242 in the circumferential direction of the spin pack 2, and springs 243 provided corresponding to each moving block 242 of the partition member 241. The partition member 241 and the spring 243 are preferably made of a material with a high thermal conductivity, such as aluminum alloy, copper alloy, ordinary steel, alloy steel, special steel, carbon fiber composite material, silicone rubber, etc. The material of the partition member 241 and the spring 243 can be any material as long as the thermal conductivity is at least higher than that of a stagnant air layer.

[0079] like Figure 7 As shown, the movable block 242 constituting the partition member 241 is an arc-shaped member. The partition member 241 is arranged around the spinning pack 2 inserted into the recess 32. The spring 243 is a compression coil spring that expands and contracts in the thickness direction of the gap. One end of the spring 243 is attached to the surface of the movable block 242 facing the heating box 3. The spring 243 is detachably attached to the heating box 3 so that the other end, opposite to the side attached to the movable block 242, contacts the wall of the heating box 3 that divides the recess 32 (more specifically, the bottom surface of the recess 232a).

[0080] The spring 243 of the heat transfer mechanism 204 is arranged in a recess 232a formed at the lower end of the wall surface that divides the recess 32 of the heating box 3. The front end surface 242a of the moving block 242 (in the thickness direction of the gap ( Figure 6The surface opposite to the surface on which the spring 243 is installed (in the left and right directions of (a) and (b)) is located outside the recess 232a. That is, the position of the front end surface 242a of the moving block 242 in the thickness direction of the gap is located closer to the spinning assembly 2 than the portion of the wall that divides the recess 32 and does not form the recess 232a. The length of the heat transfer mechanism 204 in the thickness direction of the gap when no external force is applied to the moving block 242 is greater than the gap G between the wall that divides the recess 32 in the recess 232a and the outer peripheral surface of the spinning assembly 2 (refer to Figure 6 The upper and lower surfaces of the moving block 242 are in contact with the two side surfaces of the recess 232a. That is, the length of the moving block 242 along the vertical direction is substantially equal to the length of the recess 232a along the vertical direction.

[0081] The moving block 242 is formed with an inclined surface 242b. The inclined surface 242b is formed in the moving block 242 in the thickness direction of the gap ( Figure 6 The lower surface of the portion opposite to the side on which the spring 243 is installed in the left-right direction (a) and (b) of FIG. 242b is inclined so that the lower end is located closer to the heating box 3 than the upper end in the thickness direction of the gap.

[0082] like Figure 6 As shown in (a), when the spinning pack 2 is inserted into the recess 32 from below, the upper end of the spinning pack 2 contacts the inclined surface 242b of the moving block 242. While the upper end of the spinning pack 2 contacts the inclined surface 242b of the moving block 242, the spinning pack 2 is pushed upward, thereby moving the moving block 242 toward the heating box 3 and contracting the spring 243.

[0083] like Figure 6 As shown in (b), when the spinning pack 2 is completely inserted into the recess 32, the front end surface 242a of the moving block 242 contacts the surface of the spinning pack 2. More specifically, the front end surface 242a of the moving block 242 contacts the area A (see FIG. 2 ) on the outer peripheral surface of the spinning pack 2 inserted into the recess 32, where the spinning nozzle 21 is arranged in the vertical direction. Figure 6 (b)). In this embodiment, the entire front end surface 242a of the moving block 242 contacts the area A of the outer peripheral surface of the spinning pack 2. The front end surface 242a of the moving block 242 corresponds to the contact portion of the present invention. The spring 243 contracts according to the size of the gap between the wall surface that defines the recess 32 and the outer peripheral surface of the spinning pack 2. The spring 243 applies a force to the moving block 242 toward the surface of the spinning pack 2.

[0084] When the front end 242a of the moving block 242 contacts the outer circumference of the spin pack 2, the moving block 242 and the spring 243 form a heat conduction path from the wall surface defining the recess 32 in the heating box 3 to the outer circumference of the spin pack 2. Thus, heat from the heating box 3 is transferred to the moving block 242 via the two side surfaces of the recess 232a, which are in contact with the upper and lower surfaces of the moving block 242. Furthermore, heat from the heating box 3 is also transferred to the moving block 242 via the spring 243. Finally, the heat transferred to the moving block 242 is transferred to the spin pack 2, which is in contact with the moving block 242.

[0085] Furthermore, the front end face 242a of the moving block 242 that constitutes the segmented component 241 is designed to have the same curvature as the outer surface of the spin pack 2. However, due to manufacturing errors and other factors, there may be differences in curvature between the two. Consequently, it is difficult to ensure that the entire front end face 242a of the moving block 242 contacts the outer surface of the spin pack 2. The greater the contact area between the front end face 242a of the moving block 242 and the outer surface of the spin pack 2, the more efficient the heat supply from the heating box 3 to the spin pack 2. Therefore, to increase the contact area between the front end face 242a of the moving block 242 and the outer surface of the spin pack 2, it is preferable to increase the number of segments of the segmented component 241. This ensures a larger contact area even if there are differences in curvature between the two. For example, the segmented component 241 is segmented into eight moving blocks 242.

[0086] The greater the number of springs 243, the more heat conduction paths there are, thereby improving the efficiency of heat supply from the heating box 3 to the spinning pack 2. For example, two springs 243 are provided for each of the eight moving blocks 242, for a total of 16 springs 243.

[0087] (Effects of the Third Embodiment)

[0088] According to this embodiment, in addition to the effects achieved by the same configuration as the first embodiment, the following effects can be achieved. In the melt spinning device 201 of this embodiment, the contact pressure between the surface of the spin pack 2 and the partition member 241 (moving block 242) can be increased by the biasing force of the spring 243. Consequently, the efficiency of heat supply from the heating box 3 to the spin pack 2 can be further improved.

[0089] <Fourth embodiment>

[0090] Next, refer to Figure 8(a) and (b) illustrate a melt spinning device 301 according to a fourth embodiment of the present invention. The configuration of the melt spinning device 301 according to this embodiment is substantially the same as that of the melt spinning device 1 according to the first embodiment, except for the heat transfer mechanism 304. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted.

[0091] In the first embodiment, multiple recesses 32a are formed at the lower end of the wall defining the recess 32 of the heating box 3 at equal intervals along the circumference of the recess 32. Furthermore, the recesses 32a are open downward. In contrast, the recesses 332a of this embodiment extend along the entire circumference of the recess 32. Furthermore, the wall defining the recesses 332a is composed of a bottom surface facing the outer circumference of the spin pack 2 inserted into the recess 32, and side surfaces located at either end of the bottom surface in the upper and lower directions. In other words, the recesses 332a are not open downward. The bottom surface of the recesses 332a is tilted so that, in the thickness direction of the gap, the lower end is located closer to the spin pack 2 inserted into the recess 32 than the upper end. Consequently, when the spin pack 2 is inserted into the recess 32, the gap between the bottom surface of the recess 332a and the outer circumference of the spin pack 2 forms a tapered portion 308, where the gap gradually narrows from the upper side toward the lower side.

[0092] The heat transfer mechanism 304 of this embodiment includes a partition member 341 divided into a plurality of movable blocks 342 in the circumferential direction of the spin pack 2, and springs 343 provided on each movable block 342 of the partition member 341. The partition member 341 and the spring 343 are preferably made of a material with a high thermal conductivity, such as aluminum alloy, copper alloy, ordinary steel, alloy steel, special steel, carbon fiber composite material, silicone rubber, etc. The material of the partition member 341 and the spring 343 can be any material as long as the thermal conductivity is at least higher than that of a stagnant air layer.

[0093] The moving block 342 that constitutes the partitioning member 341 is an arc-shaped member. The partitioning member 341 is positioned around the spinning pack 2 inserted into the recess 32. The spring 343 is positioned between the downward-facing surface of the wall that defines the recess 332a and the upper surface of the moving block 342. One end of the spring 343 is attached to the upper surface of the moving block 342, and the other end is removably attached to the wall that defines the recess 32. The spring 343 is, for example, a disc spring that expands and contracts in the vertical direction (the axial direction of the spinning pack 2).

[0094] The spring 343 of the heat transfer mechanism 304 is arranged in the recess 332a formed at the lower end of the wall surface that divides the recess 32 of the heating box 3. The front end surface 342a of the moving block 342 (the surface facing the outer peripheral surface of the spinning assembly 2 inserted into the recess 32) is located outside the recess 332a. That is, the position of the front end surface 342a of the moving block 342 in the thickness direction of the gap is located closer to the spinning assembly 2 side than the portion of the wall surface that divides the recess 32 where the recess 332a is not formed. Figure 8 As shown in (a), the length L2 of the portion of the movable block 342 located outside the recess 332a in the thickness direction of the gap when no external force is applied to the movable block 342 is longer than the length L1 between the portion of the wall dividing the recess 32 where the recess 332a is not formed and the outer peripheral surface of the spinning component 2 inserted into the recess 32.

[0095] The movable block 342 is formed with an inclined surface 342b. The inclined surface 342b is connected to the lower end of the front end surface 342a. The inclined surface 342b is inclined so that the lower end is closer to the heating box 3 than the upper end in the thickness direction of the gap.

[0096] The surface of the movable block 342 that faces the bottom of the recess 332a is an inclined surface 342c having the same inclination angle as the bottom of the recess 332a. Specifically, the inclined surface 342c is inclined so that its lower end is closer to the spin pack 2 inserted into the recess 32 than its upper end in the thickness direction of the gap.

[0097] like Figure 8 As shown in (a), when the spin pack 2 is inserted into the recess 32 from below, the upper end of the spin pack 2 contacts the inclined surface 342b of the movable block 342. While the upper end of the spin pack 2 contacts the inclined surface 342b of the movable block 342, the spin pack 2 is pushed upward, thereby moving the movable block 342 upward and contracting the spring 343. At this time, the movable block 342 moves upward with its inclined surface 342c in contact with the bottom surface of the recess 332a. The tilt of the bottom surface of the recess 332a allows the movable block 342 to move upward, moving its center away from the spin pack 2 inserted in the recess 32 (toward the heating box 3).

[0098] like Figure 8 As shown in (b), when the spinning pack 2 is completely inserted into the recess 32, the moving block 342 is arranged in the narrowing portion 308. In addition, the front end surface 342a of the moving block 342 contacts the surface of the spinning pack 2. More specifically, the front end surface 342a of the moving block 342 contacts the area A (refer to FIG. 3 ) in the upper and lower directions of the outer peripheral surface of the spinning pack 2 inserted into the recess 32 where the spinning nozzle 21 is arranged. Figure 8(b)). In this embodiment, the entire front end surface 342a of the movable block 342 contacts the area A of the outer peripheral surface of the spinning pack 2. The front end surface 342a of the movable block 342 corresponds to the contact portion of the present invention. The spring 343 contracts according to the size of the gap between the wall surface that defines the recess 32 and the outer peripheral surface of the spinning pack 2. The spring 343 applies a force from the upper side toward the lower side to the movable block 342.

[0099] When the front end surface 342a of the moving block 342 contacts the outer circumference of the spin pack 2, the moving block 342 and the spring 343 form a heat conduction path from the wall surface defining the recess 32 in the heating box 3 (more specifically, the bottom surface of the recess 332a) to the outer circumference of the spin pack 2. Thus, heat from the heating box 3 is first transferred to the moving block 342 and the spring 343 in contact with the heating box 3. The heat transferred to the spring 343 is then transferred to the moving block 342. The heat transferred to the moving block 342 is then transferred to the spin pack 2 in contact with the moving block 342.

[0100] Furthermore, the front end face 342a of the moving block 342 that constitutes the segmented component 341 is designed to have the same curvature as the outer surface of the spin pack 2. However, due to manufacturing errors and other factors, there may be differences in curvature between the two. Consequently, it is difficult to ensure that the entire front end face 342a of the moving block 342 contacts the outer surface of the spin pack 2. The greater the contact area between the front end face 342a of the moving block 342 and the outer surface of the spin pack 2, the more efficient the heat supply from the heating box 3 to the spin pack 2. Therefore, to increase the contact area between the front end face 342a of the moving block 342 and the outer surface of the spin pack 2, it is preferable to increase the number of segments of the segmented component 341. This ensures a larger contact area even if there are differences in curvature between the two. For example, the segmented component 341 is segmented into eight moving blocks 342.

[0101] (Effects of the Fourth Embodiment)

[0102] According to this embodiment, in addition to the effects achieved by the same configuration as the first embodiment, the following effects can also be achieved. In the melt spinning device 301 of this embodiment, the moving block 342, which constitutes the heat conduction path, is in surface contact with the wall surface of the heating box 3 that defines the recess 32 (more specifically, the bottom surface of the recess 332a) and the outer peripheral surface of the spin pack 2. Furthermore, the heat conduction path formed within the moving block 342 is the shortest distance from the wall surface of the heating box 3 that defines the recess 32 to the outer peripheral surface of the spin pack 2. This further improves the efficiency of heat supply from the heating box 3 to the spin pack 2.

[0103] (Variation)

[0104] While the embodiments of the present invention have been described above based on the accompanying drawings, it should be understood that the specific configuration is not limited to these embodiments. The scope of the present invention is not indicated by the description of the above embodiments but by the scope of the patent claims, and also includes all modifications within the meaning and scope of the patent claims.

[0105] In the above embodiment, the heat transfer mechanism 4 (104, 204, 304) is described as being mounted on the bottom surface of the recess 32a (132a, 232a, 332a) formed on the wall surface that divides the recess 32 in the heating box 3, but the present invention is not limited thereto. Figure 9 As shown, in a melt spinning device 401 according to a modification of the second embodiment, a heat transfer mechanism 404 including a belt-shaped base member 441 and a large number of bristles 442 attached to one surface of the belt-shaped base member 441 is attached to the outer peripheral surface of the spinning pack 2.

[0106] In the above embodiment, the heat transfer mechanism 4 (104, 204, 304) is described as being removably attached to the wall surface that defines the recessed portion 32 in the heating box 3. However, the present invention is not limited thereto. Specifically, the heat transfer mechanism 4 (104, 204, 304) may be configured so as not to be removable from the wall surface that defines the recessed portion 32 in the heating box 3.

[0107] In the above embodiment, a case was described where a portion of the heat transfer mechanism 4 (104, 204, 304) is disposed within the recess 32a (132a, 232a, 332a) formed on the wall surface that defines the recessed portion 32 in the heating housing 3. However, the recess 32a (132a, 232a, 332a) may not be formed. The heat transfer mechanism 4 (104, 204, 304) may also be disposed within a wall surface that defines the recessed portion without a recess.

[0108] While the central portion 41c of the leaf spring 41 in the first embodiment, the distal end portions 142a of the bristles 142 in the second embodiment, and the distal end surfaces 242a and 342a of the movable blocks 242 and 342 in the third and fourth embodiments have been described as being in contact with a vertically located area A of the surface of the spin pack 2 inserted into the recess 32, where the spinning nozzle 21 is disposed, the present invention is not limited thereto. The central portion 41c of the leaf spring 41, the distal end portions 142a of the bristles 142, and the distal end surfaces 242a and 342a of the movable blocks 242 and 342 may also be in contact with portions of the surface of the spin pack 2 other than the vertically located area A. In addition, the situation in which the front end portions 142a of all the bristles 142 in the second embodiment and the entire front end surfaces 242a, 342a of the moving blocks 242, 342 in the third and fourth embodiments are in contact with range A is described, but the front end portions 142a of a portion of the bristles 142 and a portion of the front end surfaces 242a, 342a of the moving blocks 242, 342 may also be in contact with range A.

[0109] In the first embodiment, the upper end of the folded portion 41b contacts the base portion 41a when the leaf spring 41 is elastically deformed. However, the upper end of the folded portion 41b may not contact the base portion 41a.

[0110] In the second embodiment described above, the heat transfer mechanism 104 is described as a brush having a strip-shaped base member 141 and a large number of bristles 142 attached to one side of the strip-shaped base member 141. Similarly, the heat transfer mechanism may be a bowl brush having a large number of linear members attached to one side of a strip-shaped member.

[0111] In the third embodiment described above, the upper and lower surfaces of the moving block 242 are described as being in contact with the side surfaces of the recess 232a. However, the present invention is not limited thereto. In other words, the length of the moving block 242 in the vertical direction may be sufficiently smaller than the length of the recess 232a in the vertical direction, so that the upper and lower surfaces of the moving block 242 are separated from the side surfaces of the recess 232a.

[0112] In the fourth embodiment described above, a narrowing portion 308 is formed between the wall defining the recess 32 and the outer peripheral surface of the spinning pack 2, where the gap gradually narrows from the upper side toward the lower side, and the spring 343 applies a force from the upper side toward the lower side to the movable block 342. However, the present invention is not limited to this. Specifically, for example, a narrowing portion may be formed where the gap gradually narrows from the lower side toward the upper side, and the spring may apply a force from the lower side toward the upper side to the movable block 342.

[0113] Furthermore, in the fourth embodiment, a case has been described where the recess 332 a formed in the wall surface that defines the recessed portion 32 is not open downward, but the recess 332 a may be open downward.

Claims

1. A melt spinning device, characterized in that: have: a spinning assembly having a spinning spinneret; A heating box having an internal space for inserting the spinning assembly and a recessed portion open downward; as well as The heat transfer mechanism includes a deformable member. When the spinning assembly is inserted into the recess, the deformable member is located in a gap between a wall defining the recess and a surface of the spinning assembly and is elastically deformable according to the size of the gap. When the spinning pack is inserted into the recess, components of the heat transfer mechanism including at least the deforming member form a heat conduction path from a wall surface of the heating box that defines the recess to a surface of the spinning pack.

2. The melt spinning device according to claim 1, characterized in that The heat transfer mechanism is mounted on a wall surface of the heating box that defines the recess.

3. The melt spinning device according to claim 2, characterized in that The heat transfer mechanism is detachably mounted on a wall surface that defines the recessed portion in the heating box.

4. The melt spinning device according to claim 1, characterized in that The heat transfer mechanism further includes a contact portion that contacts a region in the upper and lower directions of the surface of the spinning pack inserted into the recess where the spinning nozzle is arranged.

5. The melt spinning device according to claim 2, characterized in that The heat transfer mechanism further includes a contact portion that contacts a region in a vertical direction of the surface of the spinning pack inserted into the recess where the spinning nozzle is arranged.

6. The melt spinning device according to claim 3, characterized in that The heat transfer mechanism further includes a contact portion that contacts a region in a vertical direction of the surface of the spinning pack inserted into the recess where the spinning nozzle is arranged.

7. The melt spinning device according to claim 1, characterized in that A depression is formed on the wall surface of the heating box that divides the recess. A portion of the heat transfer mechanism is disposed in the recess.

8. The melt spinning device according to claim 2, characterized in that A depression is formed on the wall surface of the heating box that divides the recess. A portion of the heat transfer mechanism is disposed in the recess.

9. The melt spinning device according to claim 3, characterized in that A depression is formed on the wall surface of the heating box that divides the recess. A portion of the heat transfer mechanism is disposed in the recess.

10. The melt spinning device according to claim 4, characterized in that A depression is formed on the wall surface of the heating box that divides the recess. A portion of the heat transfer mechanism is disposed in the recess.

11. The melt spinning device according to claim 5, characterized in that A depression is formed on the wall surface of the heating box that divides the recess. A portion of the heat transfer mechanism is disposed in the recess.

12. The melt spinning device according to claim 6, characterized in that A depression is formed on the wall surface of the heating box that divides the recess. A portion of the heat transfer mechanism is disposed in the recess.

13. The melt spinning device according to any one of claims 1 to 12, characterized in that The above-mentioned deformation member is a spring that is fixed to either one of the wall surface that divides the above-mentioned recess and the surface of the above-mentioned spinning assembly. When the above-mentioned spinning assembly is inserted into the above-mentioned recess, it is elastically deformed by contacting the other of the wall surface that divides the above-mentioned recess and the surface of the above-mentioned spinning assembly.

14. The melt spinning device according to any one of claims 1 to 12, characterized in that The above-mentioned deformation member is a linear component, one end of which is fixed to either the wall surface dividing the above-mentioned recess or the surface of the above-mentioned spinning assembly. When the above-mentioned spinning assembly is inserted into the above-mentioned recess, the other end thereof contacts the other of the wall surface dividing the above-mentioned recess and the surface of the above-mentioned spinning assembly and is elastically deformed.

15. The melt spinning device according to any one of claims 1 to 12, characterized in that The heat transfer mechanism further includes a split member that is divided into a plurality of parts in the circumferential direction of the spinning pack. The above-mentioned deforming member is a spring that is fixed to either the wall surface that divides the above-mentioned recess or the surface of the above-mentioned spinning assembly, and when the above-mentioned spinning assembly is inserted into the above-mentioned recess, it applies a force to the above-mentioned dividing component toward the other of the wall surface that divides the above-mentioned recess and the surface of the above-mentioned spinning assembly.

16. The melt spinning device according to any one of claims 7 to 12, characterized in that A narrowing portion is formed between the bottom surface of the depression and the surface of the spinning pack, wherein the gap gradually narrows from one side toward the other side in the vertical direction. The heat transfer mechanism further includes a dividing member, which is divided into a plurality of parts in the circumferential direction of the spinning pack and constitutes the heat conduction path. The partition member is disposed in the tapered portion between the bottom surface of the recess and the surface of the spinning pack, and is in contact with both the bottom surface of the recess and the surface of the spinning pack. The deforming member is a spring, and when the spinning pack is inserted into the recess, the spring applies a force to the partition member from the one side toward the other side in the vertical direction.

17. The melt spinning device according to any one of claims 1 to 12, characterized in that A module mounting portion is provided in the recess. The module mounting portion is fixed to the bottom surface of the recess and is configured to detachably mount the spinning module.

18. The melt spinning device according to claim 13, characterized in that A module mounting portion is provided in the recess. The module mounting portion is fixed to the bottom surface of the recess and is configured to detachably mount the spinning module.

19. The melt spinning device according to claim 14, characterized in that A module mounting portion is provided in the recess. The module mounting portion is fixed to the bottom surface of the recess and is configured to detachably mount the spinning module.

20. The melt spinning device according to claim 15, characterized in that A module mounting portion is provided in the recess. The module mounting portion is fixed to the bottom surface of the recess and is configured to detachably mount the spinning module.

21. The melt spinning device according to claim 16, characterized in that A module mounting portion is provided in the recess. The module mounting portion is fixed to the bottom surface of the recess and is configured to detachably mount the spinning module.

Images