JP2003313720A - Melt-spinning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a melt-spinning device which can prevent the damage to a pack body, can press up a spinning pack to mount the spinning pack in a spinning pack receiver without rotating the spinning pack, can surely coincide polymer passages each other even in a case of a plurality of the polymer passages, and can always arrange the nozzle of a spinneret at a fiber-arranging position optimizing the cooling of the fiber with a cooling gas flow. <P>SOLUTION: This melt-spinning device is assembled by preliminarily heating the spinning pack into which a polymer guide member 5 is incorporated, fitting the lower step portion 4c of the spinning pack body 4 into the holding face 10a of a holder 10 mounted on a spinning pack-mounting tool 20, placing inlet packings 16a, 16b on the polymer guide member 5, and pressing up the spinning pack-mounting tool 20 to insert the spinning pack 3 into the spinning pack receiver 1a, and threadedly engaging the holder 10 with a screw member 9 to hold the spinning pack 3 at a prescribed position. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a melt spinning apparatus in which a spinning pack is detachably operated from below a heating box.

[0002]

2. Description of the Related Art Generally, a melt-spinning apparatus for spinning synthetic fiber yarns receives a melted undiluted solution (hereinafter referred to as a polymer) pumped from the outside, weighs it, and a member for distributing the melted stock solution to a spinning pack. It is composed of a heating box which is housed and heated / heated, and a spinning pack which is mounted in a space for mounting the spinning pack (hereinafter referred to as a spinning pack receiving part) provided on the lower surface of the heating box. . And, when it is installed in this spinning pack receiving part from below,
A method in which a spinning pack as described in Japanese Patent No. 23404 is inserted from below and is fixed to a heating box with a plurality of bolts to seal a joint portion of a polymer introduction port.
The spinning pack disclosed in Japanese Patent No. 500650 is composed of a rest portion projecting outward at the lower end of the spinning pack body and a support block supporting the rest portion, and the spinning pack body is inserted into the support block from below. A method of rotating the shaft in the axial direction and locking the bayonet with the support block is used.

In the former method of fixing the spinning pack to the heating box with a plurality of bolts, the bolts must be uniformly tightened in order to improve the sealing property.
There is a problem that the spinning pack mounting time becomes long, the temperature drop of the spinning pack becomes large, and the production efficiency deteriorates.

In the latter type in which the spinning pack body is twisted and rotated to be mounted, it is difficult to accurately match the plurality of polymer flow passages, particularly in a pack having a plurality of polymer introduction flow passages. The rest portion protruding outward is liable to be damaged during washing, preheating, and transportation of the spin pack, and in the worst case, the spin pack body must be replaced.

Therefore, in order to solve the above-mentioned problems, a spinning pack of the type described in Japanese Patent Laid-Open No. 10-1817, which is mounted without rotating the spinning pack at the time of mounting the spinning pack, has been proposed. There is. Also in this spinning pack, a male screw is formed at the lower end of the spinning pack body, and the outer diameter of this male screw is smaller than the outer diameter of the middle portion of the spinning pack body. Then, insert the spinning pack into the spinning pack receiving part with the ring formed with the female thread to be screwed onto this male thread screwed into this male thread, and push up the spinning pack by turning the ring with this female thread formed in the loosening direction. The packing of the polymer inlet can be pressed.

[0006]

However, since the spinning pack is repeatedly washed frequently, in the above-mentioned apparatus, even though the outer diameter is small, it is a male screw, so that the spinning pack has a large number of threads. It must be said that it is difficult to handle the male screw without damaging it. Once a dent is made on this screw thread, it cannot be screwed into the mating female screw, and if the damage is severe, the spinning pack body will have to be renewed.

According to the present invention, the main body of the spin pack can be prevented from being damaged, and the spin pack can be pushed up and mounted in the spin pack receiving portion without rotating the spin pack, so that even if there are a plurality of polymer channels, the polymer channels can be surely matched. It is an object of the present invention to provide a melt-spinning device capable of always arranging a spinneret outlet at a yarn disposition position where polymer leakage does not occur even when the polymer pressure is low and cooling of the yarn by cooling airflow is optimal. is there.

[0008]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the melt spinning apparatus of the present invention has the following features.
One or more polymer channels are provided correspondingly in each of the spinning pack connected body and the polymer introducing port member, and positioning means for matching the polymer channels and guide means for inserting the spinning pack from below. The spinning pack main body is provided with a spinning pack connecting body, a polymer introducing port member and a spinning pack main body, each of which is provided with a pin and a guide groove engaging with the pin, and is provided at the lower end of the spinning pack main body. Is formed with a stepped portion having a diameter smaller than the outer diameter thereof, and a retainer for inserting the stepped portion and holding the spin pack is screwed into a screw-like body fixed to the lower portion of the spin pack receiving portion of the heating box. The retainer and the threaded body are provided with a guide portion for matching the meshing start position and the meshing state of the screw.

Further, in the melt spinning apparatus of the present invention, as described in claim 2, a male screw is formed on the outer peripheral surface of the retainer, and a female screw is formed on the inner peripheral surface of the screw-shaped body screwed to the retainer. Is divided into at least four portions in the circumferential direction, and cut portions in which all the screw threads are cut are provided in two divided symmetrical positions, respectively, and a guide portion for matching the meshing start position and meshing state of the screw. Is a guide pin provided on at least two circumferentially equidistant locations on the outer peripheral surface of the cage, a surface on which the guide pin abuts when the cage provided on the threaded body is inserted, and the cage is rotated It is possible that the guide pin comprises a slanted surface on which the guide pin slides and a wall portion on which the guide pin abuts at the end of the slanted surface.

Further, as described in claim 3, the inlet packing provided in the polymer introduction port portion of the spinning pack has a cone-shaped inclined surface, and the inclination angle of the inclined surface is greater than the inclination angle of the mating member. The shape can be slightly larger and has a center ring portion for matching the polymer flow paths and a horizontal maintaining portion for maintaining the inlet packing in a horizontal state.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to the drawings, but it goes without saying that the present invention is not limited to the following embodiments. FIG. 1 is a schematic cross-sectional view showing one embodiment of the constitution of a melt spinning apparatus having a plurality of polymer channels according to the present invention. The melt spinning apparatus comprises a heating box 1 having a spinning pack receiving section 1a and a heating box body 1a. Packing 1 for sealing is formed by forming polymer introduction flow paths 2a and 2b communicating with the polymer flow paths 1b and 1c of the box body 1.
Spindle pack connection 2 attached to the upper wall of the spin pack receiving portion 1a of the heating box 1 via bolts 5 by means of
And the spun pack connected body 2 to the inlet packing 1
A spinning pack 3 that is locked via 6a and 16b, and a separable cage 10 in which a screw is formed on the outer peripheral portion for holding the spinning pack 3 by inserting the lower end of a pack body 4 of the spinning pack 3; It comprises a screw-shaped body 9 which is attached to the heating box body 1 on the opening side of the spinning pack receiving portion 1a and which is screwed into a holder 10.

The spinning pack 3 includes a spinneret 7, a polymer filtration distribution block 6, a polymer inlet port member 5, which are sequentially assembled in the pack main body 4 from bottom to top, and a lock for fixing these to the pack main body 4. Although not shown, a packing for polymer sealing is sandwiched between the joint surface of the mouthpiece 7, the polymer filtration / distribution block 6, and the polymer introducing port member 5, which is composed of the nut 8.

The positioning of the spinning pack body 4 and the polymer introducing port member 5 is performed by positioning pins 12 projecting from the outer peripheral surface of the polymer introducing port member 5 and by engaging with the positioning pins 12 and the upper inner peripheral surface of the spinning pack body 4. The holding position of the spinneret 7 with respect to the spin pack body 4 is regulated by the guide groove 4b formed in the spinneret body 4, and the spinneret 7 is provided with the positioning pin 13 projecting from the lower inner surface of the spin pack body 4 The guide groove 19 is provided.

A step portion 4c having a diameter smaller than the outer diameter is formed at the lower end of the spinning pack body 4. The outer peripheral surface of the step portion 4c is not processed with screws or the like.

A cage 10 for holding the spin pack body 4
As shown in FIGS. 2 and 3, a male screw 10b is formed on the outer circumference, and this male screw is divided into four in the circumferential direction so that a pair of facing thread portions have all the screw threads in the axial center longitudinal direction. It has a shape having a cut-off screw cut portion 10c.

The male screw 10 formed on the cage 10
On the outer peripheral surface in the vicinity of the lower end of b, when the spinning pack body 4 is fitted into the cage 10 and fitted into the spinning pack connected body 2 from below the heating box body 1, the cage 10 is maintained in a substantially vertical state. Guide pins 14 for matching the screw engagement position with the mating screw-shaped body 9 are provided at three equally spaced positions in the circumferential direction.

Further, the cage 10 is provided with a stepped hole having a large diameter on the upper side, and the large diameter side hole is engaged with the step portion 4c of the spinning pack main body 4 to form the stepped hole. The stepped portion has a holding surface 10a for receiving the insertion of the spin pack body 4.
Are formed. Further, a plurality of slits 10d for fitting the spinning pack mounting jig 20 for operating the cage 10 are provided at a plurality of positions below the stepped hole of the cage 10, that is, in the small diameter portion.

A screw-shaped body 9 that engages with the cage 10 described above.
Is formed in a ring shape as shown in FIG. 4, and is provided with an internal thread portion 9a on its inner peripheral surface. The female screw portion 9a corresponds to the male screw 10b1 and the screw cutting portion 10c of the male screw portion 10b of the retainer 10 and the female screw 9a1 and the screw cutting portion 9a, respectively.
2 so that the internal thread 9a1 and the external thread cutout 9a2 of the retainer 10 and the external thread 10b1 of the retainer 10 can be moved in the axial longitudinal direction in the circumferential direction. It has a narrow gap around the circumference.

As shown in FIGS. 5 and 6, the lower end surface of the threaded body 9 has an inclined surface 9c equal to the lead of the female screw 9a1.
And a wall surface 9d for positioning the cage 10 at a preset position when the cage 10 is screwed onto the threaded body 9.
And a horizontal surface 9e for matching the screw engagement position
Are formed so as to correspond to the three guide pins 14 projecting from the cage 10.

At this time, the horizontal surface 9e needs to be formed so that the male screw 10b1 of the retainer 10 and the female screw 9a1 of the threaded body 9 are in mesh with each other when the guide pin 14 abuts.

On the other hand, the connected spinning pack 2 is shown in FIGS.
As shown in Fig. 2, two polymer introduction flow paths 2a, 2b are formed corresponding to the polymer flow paths 1b, 1c provided in the heating box 1, and the cones are provided at the outlets of the polymer introduction flow paths 2a, 2b. The inclined surfaces 2g, 2h are formed with an inclination angle that is slightly smaller than the inclination angle of the inlet packing 16a. Packing grooves 2j, 2k for fitting the seal packing 15 are provided at the inlets of the polymer introducing channels 2a, 2b, and a bolt hole 2f for fixing the heating packing 1 is provided in the upper large diameter portion. There is. Further, a thin shaft portion 2d having a small diameter is formed extending downward, a tapered tapered portion 2e is provided at the tip of the thin shaft portion 2d, and the guide pin 1 is provided on the outer peripheral surface.
1 is projected at two symmetrical positions.

Further, the polymer introduction port member 5 fitted with the thin shaft portion 2d of the spinning pack connected body 2 has a space portion 5c fitted into the thin shaft portion 2d as shown in FIGS. Then, two polymer channels 5a, 5b penetrate from the bottom surface in correspondence with the polymer channels 2a, 2b of the spun pack coupling body 2, and the inlet packing 1 is provided at the inlet of the space 5c.
A packing support portion 5p including a stepped portion 5m for positioning 6a, and cone-shaped inclined surfaces 5g and 5h having an inclination angle slightly smaller than the inclination angle of the inlet packing 16a are formed.

A guide groove 5e in which a guide pin 11 provided in the spinning pack connecting body 2 is fitted in a wall surface 5d of the space 5c.
Is provided corresponding to the guide pin 11, and its mouth is chamfered so that the guide pin can be easily inserted.

The polymer introduction port member 5 has a flange-like end portion on the opposite side of the space portion 5c, and a positioning pin 12 for determining the relative position to the spinning pack body 4 on the outer peripheral portion thereof.
Is projected.

The inlet packings 16a, 16b sandwiched between the spin pack connected body 2 and the polymer introduction port member 5 are
As shown in FIG. 11, it has a polymer flow channel 16c and cone-shaped inclined surfaces 16d and 16e.
The inclination angle of 16e is made slightly larger than the inclination angle of the mating member. Further, the inlet packings 16a, 16b are provided with a center ring portion 16f for positioning on the polymer introduction port member 5 in a flange shape by engaging with a step portion 5m of the packing support portion 5p, and the lower surface thereof has a seating property. A horizontal portion 16g is formed for goodness.

FIG. 12 shows, as another embodiment, a melt spinning apparatus in which the heating box 1 has one polymer channel 1b, except that there is only one polymer channel. Since the structure is the same as that of the melt spinning apparatus shown in FIG.

Here, the assembling operation of the spinning pack 3 and the mounting operation to the heating box 1 in the above-described melt spinning apparatus will be described.

First, the cap 7, the filtration distribution block 6, and the polymer introduction port member 5 are sequentially inserted into the pack body 4 from the bottom to the top, and then the lock nut 8 is inserted.
Screw into. Next, the upper end of the polymer introduction port member 5 is pressed by a press or the like with a predetermined pressure capable of ensuring a seal between the members, and then the lock nut 8 is tightened to assemble the spinning pack 3.

A holder 10 for holding the assembled spin pack 3
Along with preheating with a heater (not shown) and the like, when the slits 10d of the holder 10 are engaged with the protrusions 20a provided on the spinning pack mounting jig 20, the holder 10 is spun. It is mounted on the pack mounting jig 20.
Then, the spinning pack 3 is attached to the holding surface 10a of the cage 10.
To place.

Then, with the inlet packings 16a, 16b placed on the inclined surfaces 5g, 5h of the polymer introduction port member 5 located on the upper part of the spinning pack 3, the spinning pack receiving portion 1a is spun from below the heating box 1. The spinning pack 3 is inserted by the pack mounting jig 20. With the insertion of the spinning pack 3, the space portion 5c of the polymer introduction port member 5 located on the upper portion of the spinning pack 3 is inserted into the thin shaft portion 2d of the spinning pack connected body 2 with a narrow gap, A guide groove formed in the polymer introduction port member 5 with a guide means formed by the wall surface 5d of the space 5c and the thin shaft portion 2d of the spinning pack connecting body 2 and two guide pins 11 provided in the connecting body 2. By being guided and fitted into 5e, the polymer flow passages 5a and 5b provided in the polymer introduction port member 5 and the polymer introduction flow passages 2a and 2b provided in the spinning pack connected body 2 are positioned and flowed respectively. The paths match.

On the other hand, the cage 10 located below the spinning pack 3 is fixed to the male screw portion 10b provided on the cage 10 and the lower surface of the heating box 1 in synchronization with the inserting operation of the spinning pack 3 described above. The threaded portion 9a2 of the threaded body 9 is also the female threaded portion 9a of the threaded body 9 and the threaded portion 10c of the retainer 10.
Move in the insertion direction of the spinning pack 3 in a state where they match in the circumferential direction. Then, the guide pin 14 projecting from the outer periphery of the lower end of the cage 10 comes into contact with the horizontal surface 9e formed at the lower end of the threaded body 9 to complete the inserting operation of the spinning pack. At this time, the male screw 10b1 of the cage 10 and the female screw 9a1 of the screw-shaped body 9 are aligned with each other.

Then, while maintaining the state in which the guide pin 14 is pressed against the threaded body 9, the spinning pack mounting jig 20 is rotated in the circumferential direction of the insertion axis, the cage 10 also rotates, and the guide pin 14 is rotated by the guide pin 14. Glide in a state of contacting the inclined surface 9c formed on the lower surface of the. At this time, the guide pin 11 projecting from the spinning pack connected body 2 is fitted into the guide groove 5e formed in the polymer introduction port member 5 provided corresponding to the pin 11, and the polymer introduction port member is formed. 5 is positioned in the spinning pack connected body 2, and the guide pin 12 projecting from the outer periphery of the lower end of the polymer introducing port member 5 is fitted into the guide groove 4b provided on the inner peripheral surface of the spinning pack body 4. Since the polymer inlet port member 5 is positioned in the spin pack body 4, the spin pack 3 does not rotate and only the cage 10 is placed between the lower end 4a of the spin pack body 4 and the holding surface 10a of the cage 10. To rotate. As a result, the spinning pack 3 ascends without rotating along with the cage 10 that rises in the longitudinal direction of the insertion axis due to the screw action of the screw-shaped body 9 and the cage 10.

By continuing the rotation of the cage 10, the inlet packings 16a, 1
6b comes into contact with the inclined surfaces 2g and 2h of the spin pack connected body 2,
If the rotation is further continued, the inlet packings 16a, 16b
Is pressed against the upper and lower inclined surfaces, that is, 2g and 5g, 2h and 5h, the polymer channels 2a and 5a, 2b and 5b are pressure-resistant sealed via the inlet packings 16a and 16b, and the installation of the spinning pack is completed. To do.

In order to obtain a sufficient initial sealing force,
The amount of axial movement of the spinning pack 3 until the pin 14 projecting from the cage 10 contacts the stop wall surface 9d of the pin 14 formed on the threaded body 9, in other words, the cage 1
The lead of the screw corresponding to the rotation angle of 0 is preset. Further, the cage 10 can be rotated by a maximum of approximately 90 degrees so that the lead of the screw can be set so as to obtain an initial tightening force without causing polymer leakage even at a low polymer pressure.

The inlet packings 16a, 16b are more self-sealing as the pressure of the polymer becomes higher, the pressing force on the inclined surface of each member increases due to the wedge effect.

Further, the spinning pack connecting body 2 and the polymer introducing port member 5, the polymer introducing port member 5 and the spinning pack body 4,
Also, the spin pack body 4 and the spinneret 7 are respectively the guide pins 1.
1. Since they are positioned via the positioning pins 12 and 13, the respective polymer flow paths can be always matched, and the relative position of the yarn spun from the spinneret 7 to the heating box body 1 is always constant. be able to.

The cage 10 may not be preheated together with the spinning pack 3 but may be screwed into the screw-shaped body 9 fixed to the heating box 1 to be preheated together with the heating box 1.

[0038]

According to the melt spinning apparatus of the present invention, as described in claim 1, a spinning pack and a positioning means for aligning the polymer passages formed in the polymer inlet port member of the spinning pack with each other are provided. Since the guide means for inserting the pack from below and the rotation stopping means for the spinning pack body are provided, the polymer flow paths can be matched without rotating the spinning pack.

Further, since the stepped portion at the lower end of the spin pack body is fitted in the retainer to hold the spin pack, during the dismantling, assembling and washing operations of the spin pack, the spin pack body and the spin pack are handled. It can be handled separately from the cage and is easy to handle. At that time, since the stepped portion at the lower part of the spinning pack body is fitted into the retainer, no protrusions such as screws are formed at that portion,
It has a remarkable effect of being relieved of worrying about damages such as screws.

Further, since the retainer for holding the spin pack is adapted to be screwed into the screw body fixed to the lower portion of the spin pack receiving portion of the heating box body, the retainer is removed after removing the spin pack. It is preferable to attach the to a screw-shaped body so that the heating box body can be heated and kept warm at the same time, and mistakes such as forgetting to store can be prevented.

Furthermore, since the cage and the threaded body are provided with the guide portions for matching the meshing start position and the meshing state of the screw, the male screw of the cage and the female screw of the threaded body are fitted when the spinning pack is mounted. The meshing start position immediately matches.

According to a second aspect of the present invention, the screw portion provided on the retainer and the screw body is divided in the circumferential direction, and the screw thread has a screw cut portion in which all the screw threads are cut off. Can be engaged easily and securely, and
It is possible to reduce the amount of rotation of the cage when the spin pack is attached, and after the guide pin provided on the cage abuts the contact surface provided on the screw body, tilts as the cage rotates. By sliding the surface and contacting the wall at the end of the surface, the posture when the spin pack is mounted can be made substantially vertical, and the rotation angle of the cage can be regulated, so that the yarn is cooled by the cooling airflow. The outlet of the spinneret can always be arranged at the optimum yarn arrangement position.

Further, according to the present invention, when the inlet packing has a cone-like inclined surface, a centering portion, and a horizontal maintaining portion as described in claim 3, when the spinning pack is mounted, No displacement occurs,
Polymer leakage can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a melt spinning apparatus of the present invention.

FIG. 2 is a plan view of a retainer of the spin pack in FIG.

FIG. 3 is a vertical cross-sectional view of the cage in FIG.

FIG. 4 is a plan view of the screw-shaped body in FIG.

5 is a vertical cross-sectional view of the threaded body in FIG.

FIG. 6 is a view in the direction of arrow X in FIGS. 4 and 5, showing the shape of the lower end surface of the threaded body.

FIG. 7 is a cross-sectional view of the spinning pack connected body in FIG.

FIG. 8 is a view on arrow Y in FIG.

FIG. 9 is a plan view of the polymer introduction port member in FIG.

FIG. 10 is a vertical sectional view of FIG.

FIG. 11 is an enlarged view showing an embodiment of the inlet packing joint portion in FIG. 1.

FIG. 12 is a sectional view showing another embodiment of the melt spinning apparatus of the present invention.

[Explanation of symbols]

1 heating box 1a Spin pack receiver 1b, 1c, 5a, 5b Polymer channel 2 Spin pack concatenation 2a, 2b Polymer introduction channel 2d thin shaft 2e point detail 2f bolt hole 2g, 2h, 5g, 5h, 9c, 16d, 16e Inclined surface 2j, 2k packing groove 2m large diameter part 3 Spin pack 4 Spin pack body 4a Spindle pack body bottom surface 4b, 5e, 19 Guide groove 4c step 5 Polymer inlet member 5c Information section 5d, 5f, 9d walls 5j bottom 5m, 5n steps 5p, 5q packing support 6 Polymer filtration distribution block 7 base 8 lock nuts 9 Threaded body 9a Female thread part 9a1 female screw 9a2, 10c Screw cutting part 9e Horizontal plane 10 cage 10a holding surface 10b Male thread 10b1 male screw 10d slit 11, 14 Guide pin 12, 13 Positioning pin 15 Seal packing 16a, 16b inlet packing 16c channel 16f Center ring part 16g horizontal part 17, 18 volt 20 Spin pack mounting jig 20a protrusion

Claims (3)

[Claims] 1. A heating box body having a spin pack connecting body having a polymer passage attached to a ceiling of a spin pack receiving portion, and a spin pack body having a polymer introducing member incorporated therein.
A melt-spinning device comprising a spinning pack which is inserted into the spinning pack connecting body from below to be locked while a polymer sealing inlet packing is interposed in the polymer introducing port, wherein the spinning pack connecting body and the polymer introducing port member are provided. One or more polymer channels are provided corresponding to each of the above, and positioning means for matching the polymer channels, and guide means for inserting the spinning pack from below,
A spinning pack connecting body, in which the rotation stopping means of the spinning pack main body is composed of a pin and a guide groove engaging with the pin, respectively,
The polymer introduction port member and the spin pack body are provided with a stepped portion having a diameter smaller than the outer diameter dimension at the lower end of the spin pack body, and a holder for holding the spin pack by heating the stepped portion is heated. It is adapted to be screwed into a screw-shaped body fixed to the lower part of the spinning pack receiving portion of the box body, and this retainer and the screw-shaped body are provided with a guide portion for matching the meshing start position and the meshing state of the screw. A melt spinning apparatus characterized by the above. 2. A male screw is formed on the outer peripheral surface of the retainer, and a female screw is formed on the inner peripheral surface of a screw-shaped body screwed to the retainer, and each screw portion is divided into at least four portions in the circumferential direction and is divided. Further, cutouts in which all the screw threads are cut are provided at two symmetrical positions, respectively, and guide portions for matching the meshing start position and the meshing state of the screws are provided at least at two circumferentially equidistant locations on the outer peripheral surface of the cage. The guide pin provided on the guide pin and the surface with which the guide pin abuts when the cage provided on the screw-shaped body is inserted, the inclined surface on which the guide pin slides when the cage is rotated and the inclined surface The melt-spinning apparatus according to claim 1, characterized in that the melt-spinning apparatus comprises a wall portion whose end is in contact with the guide pin. 3. The inlet packing provided in the polymer inlet of the spinning pack has a cone-shaped inclined surface, the inclination angle of the inclined surface is slightly larger than the inclination angle of the mating member, and the polymer flow The melt-spinning apparatus according to claim 1, wherein the melt-spinning apparatus has a shape having a centering portion for matching the paths and a horizontal maintaining portion for maintaining the inlet packing in a horizontal state.