Spinning apparatus

Abstract

In a spinning machine having multiple spinning units, the aim is to simultaneously reduce material costs in the supply section and suppress increases in power consumption. [Solution] Each spinning unit 20 of the spinning apparatus 2 includes a heating box 21 to which a spinning pack 22 is attached, piping 241 through which molten polymer flows toward the spinning pack 22, a gear pump 25 subject to maintenance, a cooled section X located upstream of the gear pump 25 in the flow direction A, the cooled section X having a reduced flow rate of molten polymer flowing inside when cooled, a cooling section 31 in contact with the cooled section X, and a housing 29 housing the heating box 21. The cooling section 31 has an upper end 31a to which a supply section 32 having a supply passage for supplying air as a coolant can be attached and detached. Each spinning unit 20 is configured such that the supply passage is connected to the cooling space when the supply section 32 is attached to the upper end 31a. The upper end 31a does not protrude from the outer surface of the housing 29.

Description

Technical Field

[0005] ,

[0001] The present invention relates to a spinning apparatus having a plurality of spinning units.

Background Art

[0002] Patent Document 1 describes a spinning apparatus (spinning unit) having a spinning beam (heating box) to which a spinning pack is attached, a polymer tank, and a pipe connecting the polymer tank and the spinning pack. The molten polymer in the polymer tank is pumped through the pipe to the spinning pack.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When maintaining a target part (e.g., a pumping component, etc.) provided in a pipe, it may be necessary to reduce the flow rate of the molten polymer in the pipe (e.g., stop the flow). To meet such a need, by supplying a refrigerant (e.g., air) to a cooled part upstream of the target part in the pipe via a supply part, the molten polymer in the cooled part is cooled, and it is conceivable to reduce the flow rate of the molten polymer (and thus stop the flow).

[0005] However, in the case of a spinning apparatus having a plurality of spinning units, there will be a plurality of such target parts. If a supply part is provided for the cooled part of each target part, the material cost for the number of supply parts will be incurred, increasing the material cost of the supply parts. Also, in each spinning unit, if the supply part protrudes from the outer surface of the housing that houses the heating box, the amount of heat radiated to the outside of the housing via the supply part will increase, so it becomes necessary to increase the heating frequency of the heating box, and the power consumption may increase.

[0006] The objective of the present invention is to achieve both the reduction of material costs in the supply unit and the reduction of increased power consumption in a spinning apparatus having multiple spinning units. [Means for solving the problem]

[0007] The spinning apparatus according to the present invention is a spinning apparatus having a plurality of spinning units, wherein the spinning unit comprises a heating box to which a spinning pack is attached, a pipe through which molten material flows toward the spinning pack within the heating box, a target part provided in the pipe and subject to maintenance, a cooled part located upstream of the target part in the pipe in the direction of flow of the molten material in the pipe, the cooled part having a cooling section that reduces the flow rate of the molten material flowing inside when cooled, a cooling section that defines a cooling space in contact with the cooled part, and a housing that houses the heating box, wherein the cooling section has a mounting section to which a supply section having a supply passage for supplying a refrigerant can be attached and detached, the spinning unit is configured such that the supply passage is connected to the cooling space when the supply section is attached to the mounting section, and the mounting section does not protrude from the outer surface of the housing.

[0008] According to the present invention, when a supply unit is attached to a cooling unit, a coolant can be supplied to the cooling space via a supply passage to cool the part to be cooled and reduce the flow rate of the molten material within the cooled part. In this configuration, one supply unit can be applied to multiple cooling units provided in each spinning unit. In this case, the number of supply units can be reduced compared to when a component integrating the cooling unit and the supply unit is provided for the cooled part of each spinning unit, thus reducing the material cost of the supply unit. Furthermore, according to the present invention, since the mounting portion of the cooling unit does not protrude from the outer surface of the housing, heat dissipation to the outside of the housing via the mounting portion can be suppressed, and consequently, the increase in power consumption can be suppressed. In other words, according to the present invention, in a spinning apparatus having multiple spinning units, both the reduction in material cost of the supply unit and the reduction in the increase in power consumption can be achieved.

[0009] Multiple spinning packs can be attached to the heating box, the piping branches from the target section toward the multiple spinning packs, and the target section may be a pumping component that pumps the molten material toward the multiple spinning packs.

[0010] With this configuration, maintenance of the pressurized components can be performed while the flow rate of the molten material in the cooled section is reduced by the refrigerant supplied from the supply unit.

[0011] The mounting portion may protrude from the outer surface of the heating box.

[0012] This configuration reduces the influence of heat from the heating box on the supply unit attached to the mounting part, compared to a configuration where the mounting part does not protrude from the outer surface of the heating box. Furthermore, when attaching the supply unit to the mounting part, it is not necessary to insert the supply unit into the interior of the heating box, making it easy to attach the supply unit to the cooling unit.

[0013] The mounting portion preferably has an opening.

[0014] With this configuration, when the supply unit is attached to the mounting unit, it is easy to connect the supply path to the cooling space through the opening.

[0015] The opening is preferably located upwards.

[0016] With this configuration, when attaching the supply unit to the mounting unit, the supply unit's own weight moves it downward, making it easy to attach the supply unit to the cooling unit.

[0017] The lower end can be attached to the upper end by inserting one of the upper end of the cooling section and the lower end of the supply section, which constitute the mounting section, into the other, and it is preferable that one of the components has an outer peripheral surface that is inclined in a direction in which the diameter decreases toward the other.

[0018] This configuration makes it easier to attach the supply unit to the cooling unit.

[0019] In the above configuration, it is further preferable that the other has an inner peripheral surface inclined in a direction in which the diameter increases toward the one.

[0020] According to this configuration, the attachment of the supply unit to the cooling unit can be more easily performed.

[0021] It is preferable that the inclination angle of the outer peripheral surface with respect to the vertical direction is the same as the inclination angle of the inner peripheral surface with respect to the vertical direction.

[0022] According to this configuration, it is possible to realize the attachment of the supply unit to the cooling unit while ensuring the sealing property.

[0023] Alternatively, in a configuration in which the lower end of the supply unit can be attached to the upper end by inserting one of the upper end of the cooling unit and the lower end of the supply unit that constitute the attachment portion into the other, the other may have an inner peripheral surface inclined in a direction in which the diameter increases toward the one.

[0024] Also according to this configuration, the attachment of the supply unit to the cooling unit can be more easily performed.

[0025] The supply unit further has a discharge path for discharging the refrigerant, and it is preferable that the spinning unit is configured such that the discharge path is connected to the cooling space in a state where the supply unit is attached to the attachment portion.

[0026] According to this configuration, in a state where the supply unit is attached to the cooling unit, the refrigerant heated by cooling the cooled portion by being supplied to the cooling space through the supply path can be discharged through the discharge path. Thereby, the cooled portion can be efficiently cooled. Further, since the supply unit has a discharge path, there is no need to further provide a separate component having a discharge path, and an increase in costs (material costs, manufacturing costs, etc.) due to providing a separate component can be suppressed.

[0027] The cooling part is preferably attached to positions on the pipe on the upstream side in the flow direction with respect to the cooled part and on the downstream side in the flow direction with respect to the cooled part.

[0028] According to this configuration, a cooling space is surely defined by the cooling part, and the cooled part can be efficiently cooled through the cooling space.

[0029] The cooling space preferably contacts the entire circumference of the cooled part.

[0030] According to this configuration, the cooled part can be efficiently cooled through the cooling space.

[0031] The housing has a housing space for housing the heating box body, a wall for defining the housing space, and a through hole that penetrates the wall and is blocked by the supply part when the supply part is attached to the attachment part. The spinning unit is an inhibiting part capable of blocking the through hole when the supply part is not attached to the attachment part, and preferably further includes an inhibiting part for inhibiting heat dissipation from the heating box body to the outside of the housing through the through hole.

[0032] [[ID=二十]]According to this configuration, when the supply part is not attached to the attachment part, the inhibiting part can suppress heat dissipation to the outside of the housing through the through hole, and thus can suppress an increase in power consumption.

Brief Description of the Drawings

[0033] [Figure 1] It is a side view of a spinning production facility including a spinning device according to the first embodiment of the present invention. [Figure 2] It is a schematic diagram of the spinning device shown in FIG. 1. [Figure 3] (a) is a side view of the cooling part according to the first embodiment of the present invention. (b) is a side view of the supply part according to the first embodiment of the present invention. [Figure 4] (a) is a longitudinal sectional view of the cooling part of FIG. 3(a). (b) is a longitudinal sectional view of the supply part of FIG. 3(b). [Figure 5] This is a longitudinal cross-sectional view showing the cooling unit of Figure 4(a) with the supply unit of Figure 4(b) attached. [Figure 6] This is a different longitudinal cross-sectional view from Figure 5, showing the cooling unit of Figure 4(a) with the supply unit of Figure 4(b) attached. [Figure 7] This is a vertical cross-sectional view showing the state in which the through-holes in the housing are blocked by the insulation material when the supply unit is not attached to the cooling unit. [Figure 8] (a) is a longitudinal cross-sectional view showing the mounting state of the cooling unit and the supply unit according to the first embodiment of the present invention. (b) is a longitudinal cross-sectional view showing the mounting state of the cooling unit and the supply unit according to the second embodiment of the present invention. [Figure 9] This is a longitudinal cross-sectional view corresponding to Figure 6, which shows a modified example of the present invention. [Figure 10] Figure 6 shows a corresponding longitudinal cross-sectional view illustrating another modified example of the present invention. [Modes for carrying out the invention]

[0034] <First Embodiment> First, with reference to Figure 1, a spinning production facility 1 including a spinning apparatus 2 according to the first embodiment of the present invention will be described.

[0035] In the following explanation, the vertical direction is defined based on the state in which the spinning production equipment 1 is installed and ready for use. Furthermore, the left side of Figure 1 is defined as the front of the spinning production equipment 1, and the right side of Figure 1 is defined as the rear of the spinning production equipment 1, and the left-right direction is defined when viewed from the front of the spinning production equipment 1.

[0036] As shown in Figure 1, the spinning production equipment 1 comprises a spinning machine 2 and a spinning take-up machine 3.

[0037] The spinning apparatus 2 is a device that spins molten polymer downward as multiple threads Y, and has multiple spinning units 20 (see Figure 2) arranged in the left-right direction. Details of the spinning apparatus 2 will be described later.

[0038] The spinning take-up device 3 is a device that takes up multiple yarns Y spun from the spinning device 2, and as shown in Figure 1, it has a cooling device 4, multiple oil nozzles 5, multiple guide guides 6, comb tooth guides 7, godet rollers 8 and 9, and a winding device 10. The cooling device 4, multiple oil nozzles 5, multiple guide guides 6, comb tooth guides 7, godet rollers 8 and 9, and winding device 10 are provided for each spinning unit 20 (see Figure 2).

[0039] The cooling device 4 is located below the spinning apparatus 2. The cooling device 4 has a roughly cylindrical cooling tube (not shown) with both ends open in the vertical direction. Inside the cooling tube, multiple yarns Y spun from the corresponding spinning unit 20 (see Figure 2) of the spinning apparatus 2 can travel from top to bottom. The cooling device 4 cools the multiple yarns Y by supplying cooling air to the multiple yarns Y traveling inside the cooling tube.

[0040] Multiple oil nozzles 5 are positioned below the cooling device 4 and apply oil to each of the multiple threads Y that have been cooled by the cooling device 4.

[0041] Multiple guides 6 are arranged at equal intervals in the left-right direction below each of the multiple oil nozzles 5, and individually guide the multiple threads Y to which the oil has been applied.

[0042] The comb tooth guide 7 is positioned approximately directly below the center of the multiple guide 6 in both the left-right and front-back directions. The multiple threads Y guided by the multiple guide 6 travel downwards in the comb tooth guide 7, while being spaced equally apart in the left-right direction.

[0043] The godette rollers 8 and 9 are positioned downstream of the comb tooth guide 7 in the direction of travel of the yarn Y in the spinning take-up device 3. Multiple yarns Y spun from the corresponding spinning units 20 (see Figure 2) of the spinning device 2 pass through the cooling device 4, oil nozzle 5, guide 6 and comb tooth guide 7, are wound onto the godette rollers 8 and 9, and sent to the winding device 10.

[0044] The winding device 10 includes two bobbin holders 11, a machine base 12, a turret 13 provided on the machine base 12, a support frame 14, a guide support 15, a plurality of support guides 16, a plurality of traverse devices 17, and a contact roller 18.

[0045] Each of the two bobbin holders 11 is an axial member extending in the front-to-back direction, with its rear end cantilevered by a turret 13. Each bobbin holder 11 can hold multiple bobbins B arranged in the front-to-back direction. For example, eight threads Y spun from the corresponding spinning unit 20 (see Figure 2) of the spinning apparatus 2 are wound onto each of the eight bobbins B.

[0046] The support frame 14 extends in the front-rear direction, approximately parallel to the bobbin holder 11. The rear end of the support frame 14 is cantilevered by the machine base 12.

[0047] The guide support 15 extends in the front-rear direction at the top of the support frame 14.

[0048] Multiple support guides 16 are provided on the guide support 15. The multiple support guides 16 are arranged in the front-to-back direction, corresponding to multiple bobbins B.

[0049] Multiple traverse devices 17 are provided on a support frame 14. The support frame 14 is arranged in the front-to-back direction, corresponding to multiple bobbins B and multiple support guides 16. Each traverse device 17 traverses the yarn Y in the front-to-back direction around its corresponding support guide 16.

[0050] The contact roller 18 is rotatably supported on the support frame 14.

[0051] The winding device 10 begins winding the multiple threads Y, which are being traversed by multiple traverse devices 17, onto the multiple bobbins B held in the upper of the two bobbin holders 11. During the winding of the threads Y, the contact rollers 18 are raised and lowered and / or the turret 13 is rotated to form multiple packages P, while accommodating the increase in the diameter of the packages P formed by winding the threads Y onto the bobbins B.

[0052] Next, we will refer to Figure 2 and describe the spinning apparatus 2 in detail.

[0053] As shown in Figure 2, the spinning apparatus 2 comprises a raw material tank 23, a main piping 24, and a plurality of spinning units 20.

[0054] The raw material tank 23 stores high-temperature molten polymer inside. The molten polymer is an example of the "molten material" according to the present invention.

[0055] The main piping 24 extends in the left-right direction and connects the raw material tank 23 with multiple spinning units 20.

[0056] Each of the multiple spinning units 20 includes a heating box 21, piping 241, a gear pump 25, a cooling unit 31, and a housing 29.

[0057] The heating box 21 is heated by a heat source (not shown), and its interior is at a high temperature. Multiple openings are formed on the lower surface of the heating box 21 into which multiple spinning packs 22 can be inserted. Multiple spinning packs 22 are inserted into the heating box 21 through each of the openings and attached to the heating box 21. Multiple spinning packs 22 are heated to a predetermined temperature by the heating of the heating box 21.

[0058] The piping 241 branches off from the main piping 24 and branches off into multiple spinning packs 22 inside the heating box 21. The piping 241 has a channel 24x through which molten polymer flows towards the spinning packs 22 inside the heating box 21.

[0059] The gear pump 25 is installed in the piping 241 and corresponds to the "target part" that is subject to maintenance according to the present invention. The piping 241 branches out from the gear pump 25 toward a plurality of spinning packs 22. The gear pump 25 is a pumping component that pumps molten polymer toward the plurality of spinning packs 22.

[0060] In the piping 241, a cooled section X is provided inside the heating box 21, upstream of the gear pump 25 in the flow direction A. The flow direction A is the direction in which the molten polymer flows within the flow path 24x. The cooled section X is a part of the piping 241 in which the flow rate of the molten polymer flowing inside decreases due to cooling by the cooling section 31. In this embodiment, in order to efficiently cool the cooled section X, the flow path cross-sectional area of ​​the cooled section X is smaller than the flow path cross-sectional area of ​​the part X' of the piping 241 other than the cooled section X (see Figure 6). The cooled section X has an elongated elliptical shape in the vertical direction in a cross-section perpendicular to the left-right direction.

[0061] The cooling unit 31 is attached to the piping 241 at a position upstream of the part to be cooled X in the flow direction A and at a position downstream of the part to be cooled X in the flow direction A, defining a cooling space V that is in contact with the entire circumference of the part to be cooled X.

[0062] The upper end 31a of the cooling unit 31 corresponds to the "mounting part" of the present invention, and the supply unit 32 can be attached to and detached from it. The supply unit 32 has a supply passage 32X and a discharge passage 32Y (see Figures 5 and 6). The supply passage 32X is a passage for supplying air and is connected to the air blower 35 via a tube 33. The discharge passage 32Y is a passage for discharging air. The air corresponds to the "refrigerant" of the present invention. When the supply unit 32 is mounted on the upper end 31a, the supply passage 32X and the discharge passage 32Y are configured to connect to the cooling space V. When the air blower 35 is driven with the supply unit 32 mounted on the upper end 31a, air from the air blower 35 is supplied to the cooling space V via the supply passage 32X, and the air supplied to the cooling space V is discharged via the discharge passage 32Y.

[0063] By supplying air from the air source 35 to the cooling space V and cooling the part to be cooled X, the molten polymer in the part to be cooled X can be solidified, reducing the flow rate of the molten polymer (and ultimately stopping the flow). Then, with the flow of the molten polymer in the part to be cooled X stopped in this way, maintenance can be performed on the gear pump 25 located downstream of the part to be cooled X in the flow direction A.

[0064] The housing 29 has a housing space 29v that accommodates the heating box 21, and a wall 29w (see Figure 3) that defines the housing space 29v. The upper end 31a of the cooling unit 31 protrudes from the upper surface (outer surface) of the heating box 21, but does not protrude from the upper surface (outer surface) of the housing 29, i.e., the upper wall 29w (see Figure 3(a)) of the housing 29. When the supply unit 32 is mounted on the upper end 31a of the cooling unit 31, it protrudes from the upper surface (outer surface) of the housing 29, i.e., the upper wall 29w (see Figure 3(b)) of the housing 29.

[0065] The molten polymer stored in the raw material tank 23 is pumped to the spinning pack 22 through the main pipe 24 and pipe 241 by the drive of the gear pump 25. The molten polymer then passes through the spinning pack 22 and is pushed downward through multiple through holes in the spinning die (not shown) provided at the lower end of the spinning pack 22.

[0066] Next, the cooling unit 31 and the supply unit 32 will be described in detail with reference to Figures 3 to 6.

[0067] In the following description, the vertical direction of the supply unit 32 is defined as the state in which the supply unit 32 is attached to the cooling unit 31.

[0068] As shown in Figures 3(a) and 4(a), the cooling section 31 has a lower part 31b attached to the piping 241 and a main part 31c extending upward from the lower part 31b.

[0069] The lower part 31b is cylindrical with a central axis running along the left-right direction, and the pipe 241 is inserted through its center. The lower part 31b is attached to the pipe 241 at a position upstream of the part to be cooled X in the flow direction A and at a position downstream of the part to be cooled X in the flow direction A, defining the cooling space V.

[0070] The main portion 31c is cylindrical with a central axis running vertically. The upper end of the main portion 31c, i.e., the upper end 31a of the cooling portion 31, has an opening 31x that opens upward, as shown in Figure 4(a). The upper end 31a also protrudes from the upper surface (outer surface) of the heating box 21, as shown in Figure 3(a). The outer circumferential surface 31s of the upper end 31a is inclined so that its diameter decreases upward.

[0071] As shown in Figures 3(b) and 4(b), the supply unit 32 has an upper end 32a to which the tube 33 (see Figure 2) is attached, and a lower end 32b that is attached to the upper end 31a of the cooling unit 31.

[0072] As shown in Figure 4(b), the supply unit 32 has a double-tube structure and comprises an inner tube 321 and an outer tube 322. Both the inner tube 321 and the outer tube 322 are cylindrical with a central axis aligned in the vertical direction. The outer tube 322 has an inner diameter larger than the outer diameter of the inner tube 321 and is positioned outside the inner tube 321.

[0073] The upper end of the inner tube 321 corresponds to the upper end 32a of the supply section 32, and the lower end of the outer tube 322 corresponds to the lower end 32b of the supply section 32. The upper end of the inner tube 321, i.e., the upper end 32a of the supply section 32, protrudes from the upper surface (outer surface) of the housing 29, i.e., the upper surface of the upper wall 29w, as shown in Figure 3(b). The inner circumferential surface 32s of the lower end of the outer tube 322, i.e., the lower end 32b of the supply section 32, is inclined downwards in a direction in which the diameter increases.

[0074] The inclination angle θ1 of the outer circumferential surface 31s with respect to the vertical (see Figure 4(a)) and the inclination angle θ2 of the inner circumferential surface 32s with respect to the vertical (see Figure 4(b)) are the same.

[0075] As shown in Figure 3(b), the housing 29 has a through hole 29x that penetrates the upper wall 29w. The supply unit 32 can be attached to the cooling unit 31 by inserting it into the interior of the housing 29 (housing space 29v) from above through the through hole 29x and moving it downward. In this embodiment, as shown in Figures 5 and 6, the lower end 32b of the supply unit 32 can be attached to the upper end 31a by inserting the upper end 31a of the cooling unit 31 into the lower end 32b of the supply unit 32.

[0076] When the supply unit 32 is attached to the cooling unit 31, the supply unit 32 is positioned within the through hole 29x.

[0077] The lower end of the inner tube 321 protrudes lower than the lower end of the outer tube 322, and as shown in Figures 5 and 6, when the supply unit 32 is attached to the cooling unit 31, it is located slightly above the upper surface of the cooled unit X.

[0078] The internal space of the inner pipe 321 constitutes the supply passage 32X, and the space between the inner pipe 321 and the outer pipe 322 constitutes the discharge passage 32Y.

[0079] Air from the air source 35 flows through the tube 33 and into the inner pipe 321 from the upper end 32a of the supply unit 32, and moves downward through the supply passage 32X. This air flows out from the lower end of the inner pipe 321 to the lower part 31b of the cooling unit 31 and is sent to the cooling space V in contact with the cooled part X of the piping 241. After that, the air moves upward through the discharge passage 32Y and is discharged from the discharge port 32Ya provided at the top of the outer pipe 322.

[0080] The supply passage 32X has an upper end connected to the air source 35 via a tube 33 and a lower end connected to the cooling space V. The discharge passage 32Y has an upper end formed by an outlet 32Ya and a lower end connected to the cooling space V. Air from the air source 35 moves from the upper end to the lower end of the supply passage 32X and is supplied to the cooling space V. The air supplied to the cooling space V and heated by cooling the part to be cooled X moves from the lower end to the upper end of the discharge passage 32Y and is discharged from the outlet 32Ya that constitutes the upper end.

[0081] Except during maintenance of the gear pump 25, the supply unit 32 is not attached to the cooling unit 31 (see the two spinning units 20 on the right in Figure 2). In this case, the heating frequency of the heating unit 21 needs to be increased due to heat dissipation from the heating box 21 to the outside of the housing 29 through the through-hole 29x (see Figure 3(b)), which can lead to an increase in power consumption. In this embodiment, to suppress this problem, the spinning unit 20 is equipped with an insulating material 40 (see Figures 2 and 7) that can block the through-hole 29x when the supply unit 32 is not attached to the cooling unit 31.

[0082] As shown in Figures 2 and 7, the insulation material 40 is a vertically extending member with a handle 41 at its upper end. The handle 41 protrudes from the top (outer) surface of the housing 29. As shown in Figure 7, a maintenance worker can grasp the handle 41 and insert the insulation material 40 into the interior (housing space 29v) of the housing 29 from above through the through hole 29x. When the insulation material 40 is installed in the housing 29, the through hole 29x is sealed by the insulation material 40.

[0083] The thermal insulation material 40 corresponds to the "inhibiting part" according to the present invention and has the function of inhibiting heat dissipation from the heating box 21 to the outside of the housing 29 through the through-hole 29x. For example, the thermal insulation material 40 is made of a material with lower thermal conductivity than the material of the supply part 32 (e.g., metal). Alternatively, a member including an air layer may be used as the thermal insulation material 40.

[0084] As described above, according to this embodiment, when the supply unit 32 is attached to the upper end 31a of the cooling unit 31, the cooled part X can be cooled and the flow rate of the molten polymer in the cooled part X can be reduced by supplying air to the cooling space V through the supply passage 32X of the supply unit 32 (see Figures 5 and 6). In this configuration, one supply unit 32 can be applied to multiple cooling units 31 provided in each spinning unit 20 (see Figure 2). In this case, the number of supply units 32 can be reduced compared to when a component in which the cooling unit 31 and the supply unit 32 are integrated is provided for the cooled part X of each spinning unit 20, thus reducing the material cost of the supply unit 32. Furthermore, according to this embodiment, the upper end 31a of the cooling unit 31 does not protrude from the upper surface (outer surface) of the housing 29 (see Figures 2, 3(a), etc.). Therefore, heat dissipation to the outside of the housing 29 via the upper end 31a can be suppressed, and consequently, an increase in power consumption can be suppressed. In other words, according to this embodiment, in a spinning apparatus 2 having multiple spinning units 20, it is possible to suppress both the material cost of the supply unit 32 and the increase in power consumption.

[0085] The part subject to maintenance is the gear pump 25, which pumps molten polymer towards multiple spinning packs 22 (see Figure 2). In this case, the molten polymer in the cooled part X is cooled by the air supplied from the supply unit 32, and the maintenance of the gear pump 25 can be performed with the flow rate of the molten polymer reduced.

[0086] The upper end 31a of the cooling unit 31 protrudes from the upper surface (outer surface) of the heating box 21 (see Figures 2, 3(a), etc.). With this configuration, the influence of heat from the heating box 21 on the supply unit 32 attached to the upper end 31a can be reduced compared to a configuration in which the upper end 1a does not protrude from the outer surface of the heating box 21. In addition, when attaching the supply unit 32 to the upper end 31a of the cooling unit 31, it is not necessary to insert the supply unit 32 into the interior of the heating box 21, making it easy to attach the supply unit 32 to the cooling unit 31.

[0087] The upper end 31a of the cooling unit 31 has an opening 31x (see Figure 4(a)). With this configuration, when the supply unit 32 is attached to the upper end 31a, the supply path 32X can be easily connected to the cooling space V through the opening 31x.

[0088] The opening 31x opens upward (see Figure 4(a)). With this configuration, when attaching the supply unit 32 to the upper end 31a, as shown in Figure 3(b), the supply unit 32 moves downward due to its own weight, making it easy to attach the supply unit 32 to the cooling unit 31.

[0089] The lower end 32b of the supply unit 32 can be attached to the upper end 31a by inserting the upper end 31a of the cooling unit 31 into the lower end 32b of the supply unit 32 (see Figures 5 and 6). In this case, the upper end 31a has an outer peripheral surface 31s that is inclined so that its diameter decreases upward (towards the lower end 32b before insertion). This configuration makes it easier to attach the supply unit 32 to the cooling unit 31.

[0090] Furthermore, the lower end 32b has an inner circumferential surface 32s that is inclined downwards (towards the upper end 31a before insertion) in a direction in which the diameter increases (see Figures 5 and 6). With this configuration, the attachment of the supply unit 32 to the cooling unit 31 can be performed even more easily.

[0091] The inclination angle θ1 of the outer circumferential surface 31s with respect to the vertical (see Figure 4(a)) and the inclination angle θ2 of the inner circumferential surface 32s with respect to the vertical (see Figure 4(b)) are the same. With this configuration, it is possible to mount the supply unit 32 to the cooling unit 31 while ensuring sealing performance.

[0092] The supply unit 32 has a discharge passage 32Y in addition to the supply passage 32X (see Figures 5 and 6). The spinning unit 20 is configured such that the discharge passage 32Y is connected to the cooling space V when the supply unit 32 is attached to the upper end 31a of the cooling unit 31. With this configuration, the air supplied to the cooling space V via the supply passage 32X and heated by cooling the part to be cooled X can be discharged via the discharge passage 32Y. This allows for efficient cooling of the part to be cooled X. Furthermore, since the supply unit 32 has a discharge passage 32Y, there is no need to provide an additional part with a discharge passage, thus suppressing the increase in costs (material costs, manufacturing costs, etc.) that would result from providing an additional part.

[0093] The cooling unit 31 is installed in the piping 241 at a position upstream of the part to be cooled X in the flow direction A and at a position downstream of the part to be cooled X in the flow direction A (see Figure 5). With this configuration, the cooling space V is reliably defined by the cooling unit 31, and the part to be cooled X can be efficiently cooled through the cooling space V.

[0094] The cooling space V is in contact with the entire circumference of the part to be cooled X (see Figures 5 and 6). With this configuration, the part to be cooled X can be efficiently cooled via the cooling space V.

[0095] The spinning unit 20 is equipped with an insulating material 40 that can block the through-hole 29x when the supply unit 32 is not attached to the cooling unit 31. With this configuration, when the supply unit 32 is not attached to the cooling unit 31, the insulating material 40 can suppress heat dissipation from the heating box 21 to the outside of the housing 29 through the through-hole 29x, thereby suppressing an increase in power consumption.

[0096] <Second Embodiment> Next, a second embodiment of the present invention will be described.

[0097] In the first embodiment, as shown in Figure 8(a), the lower end 32b can be attached to the upper end 31a by inserting the upper end 31a of the cooling unit 31 into the lower end 32b of the supply unit 32. The upper end 31a has an outer circumferential surface 31s that is inclined upward (towards the lower end 32b before insertion) in a direction that decreases in diameter, and the lower end 32b has an inner circumferential surface 32s that is inclined downward (towards the upper end 31a before insertion) in a direction that increases in diameter.

[0098] In the second embodiment, as shown in Figure 8(b), the lower end 232b of the supply unit 232 can be attached to the upper end 231a by inserting the lower end 232b of the supply unit 232 into the opening 231x that opens above the upper end 231a of the cooling unit 231. The lower end 232b has an outer circumferential surface 232s that is inclined downward (towards the upper end 231a before insertion) in a direction in which the diameter decreases, and the upper end 231a has an inner circumferential surface 231s that is inclined upward (towards the lower end 232b before insertion) in a direction in which the diameter increases. The inclination angle of the outer circumferential surface 232s with respect to the vertical and the inclination angle of the inner circumferential surface 231s with respect to the vertical are the same.

[0099] According to the second embodiment, by inclining the outer peripheral surface 232s and the inner peripheral surface 231s, the supply unit 32 can be easily attached to the cooling unit 31, similar to the first embodiment.

[0100] <Examples> The inventors prepared test specimens of the spinning unit 20 (see Figure 2) according to the first embodiment, and measured the power consumption when heating the heating box 21 in each test specimen, using a test specimen without the supply unit 32 attached to the cooling unit 31 as an example and a test specimen with the supply unit 32 attached to the cooling unit 31 as a comparative example. In the example, an insulating material 40 (see Figure 7) was placed in the space where the supply unit 32 is located when the supply unit 32 is attached to the cooling unit 31.

[0101] The measurement results showed that the power consumption in a steady state was 23.7 Wh in the example and 36.5 Wh in the comparative example. Therefore, it was found that the power consumption could be reduced by 12.7 Wh in the example compared to the comparative example.

[0102] <Variation> Although preferred embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and various design modifications are possible as long as they are within the scope of the claims.

[0103] For example, the parts subject to maintenance are not limited to gear pumps. The parts subject to maintenance may also be non-gear type pressure pumping components such as piston pumps, diaphragm pumps, and vane pumps. Furthermore, the parts subject to maintenance are not limited to pressure pumping components, but may also include plates positioned between the pressure pumping components and the heating chamber to protect the heating chamber from scratches and polymer contamination, parts of piping, etc.

[0104] The number of spinning packs attached to the heating box is not limited to multiple; it may be just one.

[0105] The mounting portion of the cooling unit does not have to protrude from the outer surface of the heating box. For example, the mounting portion may be positioned along the outer surface of the heating box, or it may be positioned inside the heating box.

[0106] The inhibiting portion is not limited to the vertically extending shape as in the above embodiment, but may have any shape, as long as it can close the through hole when the supply portion is not attached to the mounting portion. Furthermore, the spinning unit does not need to have an inhibiting portion.

[0107] In the above embodiment, the cooled portion X has a smaller flow path cross-sectional area than the portion X' of the piping 241 other than the cooled portion X, and has an elongated elliptical shape in the vertical direction in a cross-section perpendicular to the left-right direction, as shown in Figure 6, but is not limited to this. For example, the cross-sectional shape of the cooled portion X may be a shape other than an ellipse (circular, rectangular, etc.). Also, the cooled portion X may have a flow path cross-sectional area equivalent to the portion X' of the piping 241 other than the cooled portion X. The cooled portion X may have any shape as long as it can be cooled.

[0108] In the embodiments described above, the cooling space V is in contact with the entire circumference of the part to be cooled X, as shown in Figures 5 and 6, but is not limited to this. The cooling space V may be in contact with only a part of the part to be cooled X (not the entire circumference, but for example, only the upper or lower half-circumference).

[0109] In the above-described embodiment, the cooling space V is in contact not only with the part to be cooled X, as shown in Figure 5, but also with the portion of the pipe 241 that sandwiches the part to be cooled X in the flow direction A (the portion of the pipe 241 other than the part to be cooled X, X', which is the portion upstream of the part to be cooled X in the flow direction A and the portion downstream of the part to be cooled X in the flow direction A), but is not limited to this. For example, the cooling space V may be configured to be in contact only with the part to be cooled X (and not with the portion of the pipe 241 other than the part to be cooled X, X').

[0110] In the first embodiment (see Figure 8(a)), one of the outer circumferential surface 31s of the upper end 31a of the cooling unit 31 and the inner circumferential surface 32s of the lower end 32b of the supply unit 32 may not be inclined and may extend in the vertical direction.

[0111] In the second embodiment (see Figure 8(b)), one of the inner circumferential surface 231s of the upper end 231a of the cooling unit 231 and the outer circumferential surface 232s of the lower end 232b of the supply unit 232 may not be inclined and may extend in the vertical direction.

[0112] As a configuration for achieving attachment of the supply unit to the cooling unit, the first embodiment (see Figure 8(a)) employs a configuration in which the outer circumferential surface of the upper end of the cooling unit and the inner circumferential surface of the lower end of the supply unit are inclined, and the second embodiment (see Figure 8(b)) employs a configuration in which the inner circumferential surface of the upper end of the cooling unit and the outer circumferential surface of the lower end of the supply unit are inclined, but is not limited to these. In a configuration in which the outer and inner circumferential surfaces are not inclined and extend vertically, the following requirements may be adopted. For example, the requirement of interposing an elastic member such as a rubber gasket in the gap between the cooling unit and the supply unit at the connection portion between them may be adopted. Alternatively, for example, the requirement of providing a protrusion on the outer circumferential surface of the upper end of the cooling unit and a bent slit on the circumferential wall of the lower end of the supply unit, or providing a bent slit on the circumferential wall of the upper end of the cooling unit and a protrusion on the outer circumferential surface of the lower end of the supply unit may be adopted. In this case, the supply unit can be attached to the cooling unit by rotating the supply unit in the circumferential direction so that the protrusion moves within the slit. Alternatively, for example, a requirement may be adopted to provide a biasing member such as a ball plunger at the connection point between the cooling unit and the supply unit. In this case, after attaching the supply unit to the cooling unit, the positions of the cooling unit and the supply unit can be fixed by the biasing member. Alternatively, for example, a requirement may be adopted to provide a male threaded portion and a female threaded portion, respectively, in the cooling unit and the supply unit. In this case, the supply unit can be attached to the cooling unit by tightening the male threaded portion and the female threaded portion together.

[0113] In the above embodiment, the opening of the mounting portion is always open, but is not limited to this. For example, the opening may be closed before the supply unit is mounted on the mounting portion, and open when the supply unit is mounted on the mounting portion, so that the supply passage is connected to the cooling space. In this case, for example, a lid that can open and close the opening may be attached to the mounting portion, and the lid is closed before the supply unit is mounted on the mounting portion, and the lid is opened and the opening is opened when the supply unit is mounted on the mounting portion.

[0114] The opening is not limited to opening upwards. For example, the opening may open downwards. In this case, the supply unit can be attached to the cooling unit by moving the supply unit upwards. Alternatively, the opening may open in a direction intersecting the vertical direction. In this case, the supply unit can be attached to the cooling unit by moving the supply unit in a direction intersecting the vertical direction.

[0115] The mounting portion is a part of the cooling portion to which the supply portion can be attached and detached. For example, the opening provided in the mounting portion and the contact point between the mounting portion and the supply portion may be spaced apart from each other.

[0116] The mounting portion does not need to have an opening, as long as the supply path is configured to connect to the cooling space when the supply unit is mounted on the mounting portion. For example, when the supply unit is mounted on the mounting portion, the supply path may be configured to connect to the cooling space through an opening provided in a part other than the mounting portion.

[0117] When attaching or detaching the supply unit from the cooling unit, the cooling unit and the supply unit can be moved relative to each other. For example, when attaching the supply unit to the cooling unit, the supply unit may be moved towards the cooling unit, or the cooling unit may be moved towards the supply unit. Also, when removing the supply unit from the cooling unit, the supply unit may be moved away from the cooling unit, or the cooling unit may be moved away from the supply unit.

[0118] The supply unit does not necessarily have a discharge passage. For example, as shown in Figure 9, in a configuration where the supply unit 332 does not have a discharge passage but has a supply passage 332X, a discharge unit 333 having a discharge passage 332Y may be further provided. The discharge unit 333 is mounted on the side of the cooling unit 31 and extends in the front-rear direction. Air supplied to the cooling space V via the supply passage 332X is discharged via the discharge passage 332Y. Alternatively, for example, as shown in Figure 10, a supply unit 432 having a supply passage 432X and a discharge unit 433 having a discharge passage 432Y may be mounted on the upper end 431a of the cooling unit 431. The cooling unit 431 has an upper end 431a to which the supply unit 432 is mounted and an upper end 431a to which the discharge unit 433 is mounted. Air supplied to the cooling space V via the supply passage 432X is discharged via the discharge passage 432Y.

[0119] In the above-described embodiment (see Figure 4(a)), the upper end (mounting portion) 31a of the cooling unit 31 and the opening 31x of the upper end 31a are connected to the cooling space V, but the embodiment is not limited to this. As long as the supply path is configured to connect to the cooling space when the supply path is mounted on the mounting portion, the requirement that the mounting portion or the opening connect to the cooling space is not essential.

[0120] The refrigerant is not limited to air; for example, it may be a gas other than air or a liquid.

[0121] In the above embodiment (see Figure 2), the heating boxes of multiple adjacent spinning units are spaced apart from each other, but they may be in contact with each other. Alternatively, one heating box may be shared by multiple adjacent spinning units. [Explanation of Symbols]

[0122] 2 Spinning machine 20 spinning units 21 Heating box 22 Spinning Packs 241 Piping 24x flow channels 25. Gear pump (target part, pressure-feeding component) 29 cabinets 29V storage space 29w wall 29x Through Holes 31;231;431 Cooling section 31a;231a;431a upper end (mounting part) 31s outer periphery 31x;231x Opening 231s inner circumferential surface 32;232;332;432 Supply Department 32b;232b lower end 32s inner circumferential surface 232s outer peripheral surface 32X; 332X; 432X Supply routes 32Y; 332Y; 432Y Drainage path 35. Air supply source 40 Thermal insulation material (barrier part) A flow direction X Cooled section V Cooling space θ1, θ2 Inclination angles

Claims

1. A spinning apparatus having multiple spinning units, The aforementioned spinning unit is A heating box into which a spinning pack is attached, A pipe through which the molten material flows toward the spinning pack is located inside the heating box, The piping is provided with a part that is subject to maintenance, A cooling portion located upstream of the target portion in the piping in the flow direction of the molten material within the piping, wherein the cooling portion reduces the flow rate of the molten material flowing inside it, A cooling unit that defines a cooling space in contact with the part to be cooled, It comprises a housing that accommodates the heating box, The cooling unit has a detachable mounting portion for a supply unit having a supply passage for supplying refrigerant. The spinning unit is configured such that, when the supply unit is attached to the mounting unit, the supply path is connected to the cooling space. A spinning apparatus characterized in that the mounting portion does not protrude from the outer surface of the housing.

2. Multiple spinning packs can be attached to the heating box, The aforementioned piping branches out from the target section toward the plurality of spinning packs, The spinning apparatus according to claim 1, characterized in that the target part is a pumping component that pumps the molten material toward the plurality of spinning packs.

3. The spinning apparatus according to claim 1 or 2, characterized in that the mounting portion protrudes from the outer surface of the heating box.

4. The spinning apparatus according to any one of claims 1 to 3, characterized in that the mounting portion has an opening.

5. The spinning apparatus according to claim 4, characterized in that the opening is open upward.

6. The lower end can be attached to the upper end by inserting one of the upper end of the cooling section and the lower end of the supply section, which constitute the mounting section, into the other. The spinning apparatus according to claim 5, characterized in that one of the members has an outer surface that is inclined in a direction in which the diameter decreases toward the other member.

7. The spinning apparatus according to claim 6, characterized in that the other part has an inner circumferential surface that is inclined toward the one part in a direction that increases in diameter.

8. The spinning apparatus according to claim 7, characterized in that the angle of inclination of the outer circumferential surface with respect to the vertical and the angle of inclination of the inner circumferential surface with respect to the vertical are the same.

9. The lower end can be attached to the upper end by inserting one of the upper end of the cooling section and the lower end of the supply section, which constitute the mounting section, into the other. The spinning apparatus according to claim 5, characterized in that the other part has an inner circumferential surface that is inclined toward the one part in a direction that increases in diameter.

10. The supply unit further has a discharge passage for discharging the refrigerant, The spinning apparatus according to any one of claims 1 to 9, characterized in that the spinning unit is configured such that, when the supply unit is attached to the mounting unit, the discharge passage is connected to the cooling space.

11. The spinning apparatus according to any one of claims 1 to 10, characterized in that the cooling unit is attached to the piping at a position upstream of the part to be cooled in the flow direction and at a position downstream of the part to be cooled in the flow direction.

12. The spinning apparatus according to any one of claims 1 to 11, characterized in that the cooling space is in contact with the entire circumference of the part to be cooled.

13. The housing has a housing space for housing the heating box, a wall defining the housing space, and a through hole penetrating the wall, which is closed by the supply unit when the supply unit is mounted on the mounting portion. The spinning apparatus according to any one of claims 1 to 12, further comprising an obstructing portion capable of blocking the through hole when the supply portion is not mounted on the mounting portion, and which obstructs heat dissipation from the heating box to the outside of the housing through the through hole.

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