JPH0941215A - Apparatus for melt spinning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for melt spinning capable of readily engaging a screw part of a spinning pack with a screw part of a polymer introduction port member, keeping the discharging position of a spinneret constant and further preventing the leakage from occurring even in a state of a low polymer pressure. SOLUTION: This apparatus for melt spinning comprises a heating box unit having a spinning pack receiving part (1a) for installing a spinning pack on the undersurface and a spinning pack connecting unit 2 attached to the upper part of the spinning pack receiving part (1a) and a spinning pack 5 screwed into a screwing part of the spinning pack connecting unit 2 in a state thereof supporting a packing 15 on a joint area of the spinning pack 5 to the spinning pack connecting unit 2. The apparatus for melt spinning is further equipped with a guide part for fitting into a screwing part at the tip of the spinning pack connecting part 2 and a polymer introduction port member 10 attached to the head of the spinning pack 5 and pins 14 for locating in order to align the engagement of the screws and maintaining the posture for maintaining the posture of the spinning pack 5 in nearly a vertical state when rotating the spinning pack.

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 a synthetic fiber yarn, a member and the like for receiving a melted undiluted liquid (hereinafter referred to as a polymer) pumped from the outside, measuring it, and distributing it to a spinning pack. And a spinning pack which is installed in a space for mounting the spinning pack, which is provided on the lower surface of the heating box.

When the spinning pack is mounted in the space of the heating box from below, a spinning pack as described in JP-B-51-27771 and JP-B-2-6842 is inserted from below. By pressing a side portion of the spin pack with a push rod or a push bolt provided on the heating box body and fixing the spinning pack to the heating box body to seal the joint portion of the polymer inlet. -10
A method of sealing a joint portion of a polymer introduction port by inserting a spinning pack as described in Japanese Patent No. 7313 from below and screwing and fixing a plurality of bolts into the spinning pack from above the heating box. Or Japanese Patent Publication Sho 5
The spinning pack as described in Japanese Patent Application No. 3-23404 is inserted from below, and a plurality of bolts are screwed into the heating box from below the spinning pack to be fixed, thereby sealing the joint portion of the polymer introduction port. The way is done.

In the former method of pressing the side portion of the spinning pack and fixing it to the heating box, a large pressing force is required to improve the sealing property, and the member that receives the repulsive force is made firm. In addition to that, the amount of deformation of the sealing packing is influenced by the magnitude of this pressing force, which causes a deviation in the mounting position of the spinning pack with respect to the space for mounting the spinning pack formed in the heating box, If the amount of deviation is large, there is a problem that the spin pack comes into contact with the wall surface of the heating box and the heat conduction to the spin pack becomes uneven.

In the latter method of fixing the spinning pack to the heating box with a plurality of bolts, it is necessary to uniformly tighten the bolts in order to improve the sealing property. However, there is a problem in that the operating efficiency becomes low.

Therefore, in order to solve the above-mentioned problems, there is a space for mounting a spinning pack on the lower surface as described in JP-A-60-252710, and the space above the space is provided. A heating box to which a spinning pack connecting body having a polymer introducing passage and a bayonet screw for connecting is attached, and a bayonet of the spinning pack connecting body in a state where a sealing packing is held on a joint surface of the spinning pack connecting body. There has been proposed a melt spinning apparatus including a spinning pack that is screwed by being rotated by a predetermined angle with respect to a screw.

In the apparatus, the packing in the spinning pack, the packing of the spinning pack connecting body and the packing of the joining surface of the spinning pack are self-sealed by polymer pressure, and the spinning pack can be attached by one-touch by a bayonet screw.

[0008]

In the above-mentioned apparatus, since each packing self-seals by the polymer pressure, troubles such as the initial stage of polymer introduction where the polymer pressure is extremely low or the metering pump malfunctions. In the case where the polymer pressure suddenly drops due to the occurrence of a temporary stop of liquid transfer, a sufficient sealing effect cannot be obtained, and there is a problem that polymer leaks from the packing part.

When it is difficult to engage a heavy spin pack with one hand while engaging with a bayonet screw, and when the spinneret has staggered or rectangular discharge holes, There is a problem that the discharge position of the spinneret is different depending on the meshing position of the bayonet screw and the blowing of the cooling air cannot be the same, and the yarn quality differs for each spinning pack.

According to the present invention, the discharge position of the spinneret can be kept constant, leakage does not occur even when the pressure of the polymer is low, and the threaded portion of the spinning pack and the threaded portion of the polymer introduction port member can be easily meshed with each other. It is an object to provide a melt spinning device.

[0011]

In order to solve the above-mentioned problems, the melt spinning apparatus of the present invention has a spinning pack connecting body and a spinning pack connecting body and a spinning yarn as a polymer introduction port member of the spinning pack. A guide portion for matching the screw engagement position with the threaded portion of the polymer introduction port member of the pack is formed.

Further, in the melt spinning apparatus of the present invention, the spinning pack connecting body and the polymer introducing port member of the spinning pack are attached to the spinning pack connecting body and the threaded portion of the polymer introducing port member of the spinning pack. A structure in which a positioning portion is formed to keep the discharge position of the mouthpiece constant, or the packing has a cone-shaped inclined surface, and the inclination angle of the inclined surface is the inclination of the mating member. 5. A structure having a centering part slightly larger than the angle and having a centering part for matching the polymer passages and a horizontal maintaining part for maintaining the packing in a horizontal state, or the spinning pack according to claim 4, wherein the packing is in the spinning pack. And the packing on the joint surface are assembled and mounted so as to have initial tightening forces.

Further, according to a fifth aspect of the present invention, there is provided a spinning pack connecting body, wherein a threaded shaft body has a thin shaft portion in which a thread portion is cut off by a predetermined length at a tip portion of the shaft body, and a thread portion is circumferentially formed. It is divided into at least four parts, and two symmetrical parts are divided into a shape having a thread cutting portion in which all threads are cut in the longitudinal direction of the axial center, and the polymer introduction port member is screwed with the spinning pack connecting body. 7. A spinning pack connecting body is provided with at least two positioning pins so as to be equidistantly arranged in the circumferential direction, and a polymer is introduced. 8. The surface of the spout member facing the spin pack concatenation is provided with a position-defining wall portion on which the positioning pins come into contact, or facing the spin pack concatenation of the polymer introducing port member according to claim 7. The surface of the polymer It can be a configuration in which allowed formed corresponding to leads equal inclined surface of the thread formed on the mouth member to a pin projecting from the spin pack connecting body.

[0014]

FIG. 1 is a schematic cross-sectional view showing one embodiment of the constitution of the melt spinning apparatus of the present invention. The melt spinning apparatus comprises a heating box 1 having a spinning pack receiving section 1a and a heating box 1. It has a polymer introduction passage 2a communicating with the polymer passage 1b and a male screw portion 2b for connection, and a bolt 3 is provided to seal the spinning pack receiving portion 1a of the heating box 1 so that the male screw portion 2b is located below. The spinning pack connecting body 2 is attached via a packing 4, and the spinning pack 5 is screwed to the male screw portion 2b of the spinning pack connecting body 2.

The spinning pack 5 is a cylindrical pack body 6
And a cap 7, a filter case 8, a filter 9, a polymer introducing port member 10 and a lock nut 11 for fixing these to the pack body 6 which are sequentially mounted in the pack body 6 from bottom to top. It is configured.

Ring-shaped packings 12 are attached to the recesses 8b and 10k formed at the joint between the filter case 8 and the polymer inlet member 10, and the recess 8a of the filter case 8 is made of sand or the like. The filter material 13 is filled.

The male screw portion 2b of the above-mentioned spinning pack connected body 2
As shown in FIGS. 2 and 3, a shaft-shaped body 2b1 formed with a male screw 2b2 is provided with a thin shaft-shaped guide portion 2b3 in which a thread portion is cut off by a predetermined length, and the male screw 2b2 is formed in a circumferential direction. It is divided into four parts, and the two divided symmetrical parts have a screw cut portion 2b4 in which all the threads are cut in the axial longitudinal direction. The screw cutting portion 2b4 may be provided at three locations, four locations, or the like.

Further, the male screw portion 2b of the spinning pack connected body 2
At the base of the spin pack, the spin pack is used for positioning so as to make the spinneret discharge position constant when the spin pack 5 is mounted, and when the polymer introduction port member 10 of the spin pack 5 is screwed into the spin pack connected body 2. The pin 14 having a circular cross-section for also maintaining the posture of the shaft body 2 for maintaining the posture of the shaft body 2 in a substantially vertical state.
It is projected so as to be evenly distributed at three locations in the circumferential direction of b1.

The pin 14 may be a rod-shaped body having a rectangular cross-section, or the rod-shaped body 14 ′ as shown in FIGS. 9 and 10 may be formed integrally with the spinning pack connecting body 2. it can.

The polymer inlet member 10 described above is shown in FIG.
As shown in FIG. 5, a hole 10a for the polymer passage is formed, and a female screw portion 10b that is screwed into the male screw portion 2b of the pack connecting body 2 is formed.

The internal thread portion 10b comprises an external thread 2b2 of the external thread portion 2b of the spinning pack connecting body 2, a thread cutting portion 2b4, and a corresponding internal thread 10b1 and a thread cutting portion 10b2. The cutout portion 2b4 and the screw cutout portion 10b2 have a narrow gap so that they can be moved in the longitudinal direction of the axial center while being aligned with the female screw 2b2 of the spinning pack connecting body 2 in the circumferential direction.

Further, as shown in FIG. 6, an inclined surface 10c equal to the lead of the female screw 10b1 of the female screw portion 10b is provided on the upper end surface of the polymer inlet member 10, and the polymer inlet member 1
A wall surface 10d for fixing 0 to a preset position when screwed to the spinning pack connecting body 2 and a horizontal surface 10e for matching screw engagement positions are provided on the spinning pack connecting body 2 in a protruding manner. It is formed so as to correspond to the pin 14 of the book.

The horizontal surface 10e needs to be formed so that the male screw 2b2 of the spinning pack connecting body 2 and the female screw 10b2 of the polymer introducing port member 10 coincide with each other when the pin 14 abuts them.

As shown in FIG. 7, the packing 15 mounted on the joint surface between the spinning pack connected body 2 and the polymer inlet member 10 has a polymer passage 15a and a cone-shaped inclined surface 15 as shown in FIG.
b, 15c, and the inclination angles of the inclined surfaces 15b, 15c are each 0.1 to 0.1 from the inclination angles formed by the inclined surface 2c of the spinning pack connected body 2 and the inclined surface 10f of the polymer inlet member 10. The centering portion 15d and the centering portion 15d that are engaged with the polymer passage alignment step 10g formed in the polymer introducing port member 10 and are formed in the polymer introducing port member 10 are made larger by 5 degrees, preferably 1 to 3 degrees. It has a shape having a horizontal portion 15e that engages with the packing support portion 10h.

The inlet packing 15 is a centering portion 1 which engages with a step portion 10j for aligning a polymer passage formed in a polymer inlet member 10 as shown in FIG.
It is also possible to use a shape having only 5f.

The ring-shaped packing 12 in the above-mentioned spinning pack 5 tightens the lock nut 11 so that a preset initial tightening force is applied.

When the polymer inlet port member 10 of the spinning pack 5 is screwed onto the spinning pack connecting body 2, an initial tightening force is applied to the packing 15 on the joint surface.

Spin pack 5 in the above-described melt spinning apparatus
The assembly and mounting operation of the spinning pack 5 to the heating box 1 will be described.

The spinning pack 5 is arranged in the pack body 6 from the bottom to the top, the spinneret 7, the filter case 8, the filter 9, the filter 13, the packing 12, and the polymer introduction port member 10.
Are sequentially inserted, and the lock nut 11 is screwed into the pack body 6 so that the packing 12 between the filter case 8 and the polymer introduction port member 10 has an initial tightening force that does not cause leakage even at low polymer pressure. At this time, the upper surface of the base 7 and the lower surface of the filter case 8 are pressed and sealed.

It is necessary to set the dimensions of the packing 12 in consideration of the crushing amount for giving the initial tightening force.

The spinning pack 5 assembled in this way is heated in advance by a heater (not shown), and when the spinning pack 5 reaches a predetermined temperature, it is taken out of the heater and the polymer inlet of the spinning pack 5 is introduced. When the packing 15 is placed on the inclined surface 10f of the member 10 and is inserted from the lower side of the heating box 1 toward the spinning pack receiving portion 1a, the female screw 10b1 of the polymer introducing port member 10 guides the spinning pack connecting body 2. Two
Enter along b3 to enter polymer passages 2a, 10a, 15a
And then the internal thread 10b2 of the polymer introduction port member 10 and the thread cutting portion 2b4 of the spinning pack coupling body 2 are
The thread cutting portion 10b2 of the polymer introducing port member 10 moves in a state of being aligned with the female screw 2b2 of the spinning pack connecting body 2 in the circumferential direction.

When the horizontal surface 10e formed on the upper surface of the polymer introducing port member 10 abuts on the pin 14 projecting from the spinning pack connecting body 2, the inserting operation of the spinning pack 5 is completed.

At this time, the male screw 2b2 of the spinning pack connecting body 2
And the engagement position of the female screw 10b2 of the polymer inlet member 10 are matched.

Next, when the rod pack 5 is rotated, the inclined surface 10 formed on the upper surface of the polymer inlet member 10 is rotated.
The c moves in a state of abutting on the pin 14 projecting from the spinning pack connected body 2.

Then, the packing 15 on the polymer inlet member 10 comes into contact with the inclined surface 2c of the spinning pack connected body 2,
When the spinning pack 5 is further rotated, the positioning wall surface 10d formed on the polymer introducing port member 10 comes into contact with the pin 14 projecting from the spinning pack connecting body 2 to complete the attachment of the spinning pack 5.

By rotating the above-mentioned spinning pack 5 by about 90 degrees, the packing 15 is moved to the upper and lower inclined surfaces 15b, 15
The portion c is crushed by the inclined surface 2c of the spinning pack connected body 2 and the inclined surface 10f of the polymer inlet member 10, and is clamped so as to have an initial tightening force that does not cause leakage even at a low polymer pressure.

When the polymer pressure increases, the packings 12 and 15 are self-sealed by being pressed against the wall surface of the packing mounting portion of each member.

[0038]

As described in claim 1, the melt spinning apparatus of the present invention has a structure in which a guide portion for matching the meshing positions of the screws is formed in the spin pack connecting body and the polymer introducing port member of the spin pack. Therefore, the engagement position of the male screw of the spinning pack connected body and the female screw of the polymer introducing port member can be easily matched when the spinning bag is mounted.

Further, the melt spinning apparatus of the present invention has a structure in which a spinning pack connecting body and a polymer introducing port member of the spinning pack are formed with positioning portions for keeping the discharge position of the spinneret constant. Therefore, even a mouthpiece having staggered or rectangular discharge holes can be mounted so that the discharge position of the mouthpiece is constant with respect to the cooling air blowing direction. 3, the packing of the joint surface 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 packing and the centering portion for matching the polymer passages are made horizontal. With a shape that has a horizontal maintaining part to maintain the packing, the packing does not move during the spin pack mounting operation, and the amount of deformation of the packing due to tightening can be secured, and polymer leakage can be reliably prevented. It can be a spin pack as in claim 4, as the packing of the packing and the joint surface in a spin pack having a respective initial tightening force assembly,
By adopting a structure in which the polymer is mounted, it is possible to reliably prevent the polymer from leaking even when the polymer pressure is in a low pressure state.

Further, in the spinning pack connecting body according to a fifth aspect of the present invention, a threaded shaft has a thin shaft portion in which a thread portion is cut off by a predetermined length at a tip portion of the shaft body and a thread portion in a circumferential direction. It is divided into at least four parts, and two symmetrical parts are divided into a shape having a thread cutting portion in which all threads are cut in the longitudinal direction of the axial center, and the polymer introduction port member is screwed with the spinning pack connecting body. When the threaded portion and the threaded portion to be screwed are formed in a shape, the threaded portion can be easily and surely engaged with each other, and the rotation amount when the spinning pack is mounted can be reduced. Positioning pins are projectingly provided on at least two circumferentially equidistant locations on the spinning pack connected body, and the positioning pins are in contact with the surface of the polymer introduction port member facing the spinning pack connected body. Texture When the wall portion is provided, the spinning pack can be reliably attached to the connecting body so that the discharge position is constant, and the spinning pack connecting body of the polymer introducing port member faces the connecting body. When the inclined surface, which is equal to the lead of the screw formed on the polymer introduction port member, is formed corresponding to the pin protruding from the spinning pack connecting body, the spinning pack is rotated when the spinning pack is rotated. The posture of can be maintained in a substantially vertical state,
The first engagement of the screw portion can be surely and smoothly performed.

[Brief description of drawings]

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

FIG. 2 is a schematic cross-sectional view showing one embodiment of the constitution of the spinning pack connected body in FIG.

FIG. 3 is a view on arrow I-I in FIG.

FIG. 4 is a schematic cross-sectional view showing one example of the configuration of the polymer introduction port member in FIG.

5 is a view taken in the direction of arrows II-II in FIG. 4;

6 is a view on arrow III in FIG. 4. FIG.

FIG. 7 is a schematic enlarged view showing one embodiment of the packing mounting portion on the joint surface in FIG.

8 is a schematic enlarged view showing another embodiment of the packing mounting portion of FIG.

9 is a schematic view showing another embodiment of the pin in FIG. 1. FIG.

10 is a view taken along the line IV-IV in FIG.

[Explanation of symbols]

 1 Heating Box 2 Spinning Pack Connection 3 Bolts 4, 12, 15 Packing 5 Spinning Pack 6 Pack Body 7 Spindle 8 Filter Case 9 Filter 10 Polymer Introducing Member 11 Locknut 13 Filter 13 Pin 14 'Rod 1a Spindle Pack Receptor 1b, 10a, 15a Polymer passage 2a Polymer introduction passage 2b Male screw portion 8a Recess 10b Female screw portion 2c, 10c, 10f, 15b Inclined surface 10d Wall surface 10e Horizontal surface 10g, 10j 10k Step portion 10h Packing support portion 15c, 15e Centering portion 15d Horizontal part 2b1 Shaft part 2b2 Male screw 2b3 Guide part 2b4, 10b2 Screw thread cutting part 10b1 Female screw

Claims (7)

[Claims] 1. A heating box in which a spinning pack connecting body having a polymer introduction passage and a connecting screw portion is attached to a spinning pack receiving portion, and a screw for screwing the screw box with a sealing packing interposed. In a spinning device consisting of a spinning pack to be worn, a melt is characterized in that a guide portion for matching screw engagement positions is formed in the spinning pack connected body and the screwing portion of the polymer introduction port member of the spinning pack. Spinning equipment. 2. A heating box in which a spinning pack connecting body having a polymer introducing passage and a connecting screw portion is attached to a spinning pack receiving portion, and a screw for inserting the sealing packing into the screw portion. A spinning device comprising a spinning pack to be worn, characterized in that a positioning portion for making a discharge position of the spinneret constant is formed in the spinning pack connecting body and the screwing portion of the polymer introduction port member of the spinning pack. Melt spinning equipment. 3. A heating box in which a spinning pack connecting body having a polymer introduction passage and a connecting screw portion is attached to the spinning pack receiving portion, and a screw for inserting the sealing packing into the screw box. In a spinning device comprising a spinning pack to be worn, the packing 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 packing has a centering portion and a packing. The melt spinning apparatus is characterized by having a shape having a horizontal maintaining portion for maintaining the horizontal state. 4. A heating box in which a spinning pack connecting body having a polymer introduction passage and a connecting screw portion is attached to a spinning pack receiving portion, and a screw for screwing the screw box with a sealing packing interposed. A spinning device comprising a spinning pack to be worn, wherein the spinning pack is assembled and mounted so that the packing in the spinning pack and the packing on the joint surface each have an initial tightening force. . 5. A spinning pack connecting body is divided into a thin shaft portion in which a threaded portion has a predetermined length at a tip portion of a shaft body formed with a screw, and a threaded portion divided into at least four in a circumferential direction. The two symmetrical points are formed so as to have a thread cutting portion in which all the threads are cut in the longitudinal direction of the axial center, and the polymer introducing port member is screwed with the thread portion for screwing with the spinning pack coupling body. The melt-spinning apparatus according to claim 1, wherein the melt-spinning apparatus has a shape having a portion. 6. The spinning pack connecting body is provided with at least two positioning pins projecting so as to be evenly distributed in the circumferential direction, and the positioning pins are provided on the surface of the polymer introducing port member facing the spinning pack connecting body. The melt spinning apparatus according to claim 1, further comprising: a texture wall portion at which the pin abuts. 7. A surface of the polymer introducing port member facing the spin pack connecting body is provided with an inclined surface equal to the lead of a screw formed in the polymer introducing port member, corresponding to a pin protruding from the spin pack connecting body. The melt spinning apparatus according to claim 6, wherein the melt spinning apparatus is formed.