JPH05771U - Spinneret pack for melt spinning - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a base pack which can prevent generation of heat-degraded polymer and poor dispersibility. [Structure] A doughnut-shaped leaf disk filter 9 is laminated on a filter case 1 of a spinneret pack, and a polymer is supplied from a supply passage 20 through an introduction groove 15 of the filter 9 to a supply chamber 21. Fill up. After passing through the filter medium 10 to be filtered from here, it is radially dispersed toward the outer periphery at the position of the spacer 11, and is led out to the polymer passage 18 from the lead-out hole 17 of the outer peripheral hub ring 16 and is fed from the center of the filter 9 to the outer periphery. The polymer dispersed toward is directly distributed on the base 4 through the guide hole 23 of the distribution plate which is perforated in a circular shape without squeezing it in one place.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spinneret pack for a melt-spinning apparatus, and in particular, it is constructed so that a large number of synthetic fibers can be spun from a single spinneret plate, and a filter portion is composed of a leaf disc filter. It relates to the improvement of the base pack.

[0002]

[Prior Art]

 Generally, in melt spinning of synthetic fibers, a polymer supplied to a spinneret pack is introduced through a filtration step in advance, and various filters are also provided in the spinneret pack to further filter the introduced polymer.

Conventionally, the filter provided in the die pack is generally a flat plate obtained by sintering a metal mesh or a metallized nonwoven fabric mat, but in recent years, in order to improve the filtration efficiency of the introduced polymer. , A spinner pack device has been proposed, in which a multi-layered filter device with leaf disc filters is provided in the spinneret pack to form a wide filtration surface to improve the filtration effect and extend the service life. (Jpn. Kokoku Sho 57-31160, Shokoku Sho 63-140074, etc.).

All of these conventional base packs are housed and arranged in the cavity of the filter case. The filter device is a stack of leaf disk filters arranged between the head disk and the bottom disk. It is configured by being sandwiched by a center rod penetrating them.

In this case, the introduced polymer is radially distributed from the central top of the head disk to the outer circumference of the head disk, and passes through the polymer flow path formed by the outer circumference of the filter device and the inner circumference of the cavity. Then, the polymer flow is filtered through each leaf disc filter, and the polymer flow is narrowed to one location at the center of the bottom disk through the filter polymer flow passage formed on the outer periphery of the center rod. After this, the polymer is again distributed in a radial shape corresponding to the position of the nozzle on the distribution plate, which is circumferential or perforated on the entire surface of the die.

However, in the structure of such a conventional spinneret pack, a stagnant portion is likely to be formed around the head disk and the center rod, and radial distribution is made from the center portion of the bottom disk corresponding to the spinneret nozzle position. Even in this case, it is extremely difficult to make a uniform distribution. In particular, it has a drawback that a stagnant portion is likely to occur in the outermost peripheral portion, causing problems such as thermal deterioration and gelation.

[0007]

[Problems to be solved by the device]

 The present invention is intended to eliminate the drawbacks of the prior art, and thus the flow of the polymer in the pack is simplified and the residence time of the polymer in the die pack is shortened as much as possible. , The polymer flow obtained by filtering the leaf disc filter is directly distributed to the upper part of the outer circumference of the die nozzle where the retention part is apt to occur without once confining it to one place, so that heat-degraded polymer is generated or the distribution is poor. It provides a clasp pack that can eliminate the problem.

[0008]

[Means for Solving the Problems]

 That is, the present invention integrally connects a filter case, a distribution plate and a spinneret retainer, and a spinneret pack for melt spinning in which a spinneret having a discharge hole is sandwiched between the distributor plate and the spinneret retainer. Therefore, the filter main body, which is formed by laminating at least one doughnut-shaped leaf disk filter having a thick inner and outer peripheral portion in the hollow portion of the filter case, is housed and arranged. -The space formed between the lift disc filter and the hollow space in the center of the lift disc, which corresponds to the polymer inlet on the top of the filter, and serves as a polymer supply path to the main body of the filter. As a polymer supply chamber, a polymer passage is formed between the filter body and the cavity of the filter case, and a polymer introduction groove to the polymer supply chamber and a polymer passage are formed in the leaf disk filter. − To the aisle Provided out hole radially and the polymer - polymer provided a passage circumferentially distributor plate - a mouthpiece Patsu click for melt spinning, characterized in that it has as communicating with the guide hole.

[0009]

[Action]

 According to the present invention, at least one doughnut-shaped relief disk filter is laminated in the cavity of the filter case of the mouthpiece pack, and the polymer is formed in the center inner circumference of these filters. Side to the outer peripheral side, and the polymer dispersed radially from the center of the leaf disc filter to the outer periphery is passed directly through the distributor plate, which is formed in a circular shape, without squeezing it in one place. Distribute to.

[0010]

【Example】

 Hereinafter, the present invention will be described with reference to the drawings, but the drawings show specific embodiments of the present invention, and the present invention is not limited to the illustrated examples, and may be in accordance with the spirit of the description described above or below. Can be used as is for spin packs of other shapes, or the same can be done by changing the shape of parts or the design.

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a partial sectional view of a leaf disc filter shown in FIG. It is a figure.

In the figure, reference numerals 1, 2 and 3 respectively denote a filter case, a distribution plate and a cap retainer, which are integrally connected by a bolt 5 and between the distributor plate 2 and the cap retainer 3. A spinneret 4 having a discharge hole 22 is sandwiched between the two. 3'is an auxiliary mouth ring retainer, and 6 is a fixing bolt.

The filter case 1 has a relatively large-capacity circular hollow chamber 7 having an open lower surface, which is formed in the inside of the filter case 1. The hollow chamber 7 has a diameter slightly smaller than that of the hollow chamber 7 via the lower surface. A filter main body 8 described later is accommodated concentrically. The filter main body 8 is constructed by stacking at least one doughnut-shaped leaf disk filter 9 having a thick inner and outer peripheral portions in a multi-layer structure.

The leaf disc filter 9 is a spacer consisting of a pair of doughnut-shaped filter media 10 obtained by sintering a metal fiber nonwoven fabric mat, and a pair of punching plates 12 and a wire net 13 interposed therebetween. 11. The inner peripheral hub ring 14 and the outer peripheral hub ring 16 and the like are fixed to the inner and outer edge portions (inner outer peripheral portion) of the filter medium 10 so as to sandwich the filter medium 10.

The filter medium 10 is made of a thin mat of sintered metal fibers, and is usually used by covering the outside with a wire mesh having a slightly coarse mesh.

The relief disk filter 9 preferably has the above-mentioned structure, but is not limited to this, and various other known shapes or structures can be used.

Polymer inlet grooves 15 and outlet holes 17 are radially provided in the upper and lower surfaces of the inner hub ring 14 and in an intermediate portion of the outer hub ring 16, respectively, and the inlet grooves 15 are provided with a polymer inlet 19 which will be described later. The lead-out hole 17 is provided so as to communicate with the chamber 21 and to communicate with the polymer passage 18 formed between the filter body 8 and the hollow chamber 7 from the inside of the spacer 11 (the wire mesh 13 portion).

Such a leaf disc filter 9 is laminated in multiple layers in the central portion of the cavity 7 and is tightened so that the inner hub ring 14 causes the polymer of the filter case 1 to be attached to the central portion. A polymer supply passage 20 which is in communication with the inlet 19 and serves as a pressure filling passage is formed, and the above-mentioned polymer passage 18 is further provided outside the filter main body 8 and is further connected to the relief disc filter 9 and the reel. A polymer supply chamber 21 for the filter medium 10 is formed between the disk filter 9 and between the disk filter 9 and the filter case 1 or the distribution plate 2.

Further, a polymer guide hole 23 communicating with the discharge hole 22 of the die 4 is formed in the distribution plate 2 in a circumferential shape, and is arranged so as to be continuous with the polymer passage 18.

In such a die pack, however, the polymer fed under pressure to the polymer introduction port 19 is supplied from the polymer supply passage 20 through the introduction groove 15 of the lift disc filter 9 to supply the polymer. Fill room 21. The polymer filled therein is filtered by passing through the filter medium 10, then radially dispersed toward the outer periphery through the spacer 11, and is led out to the polymer passage 18 through the lead-out hole 17 of the outer peripheral hub ring 16. R. Then, it flows down through the polymer passage 18 and is distributed on the base 4 through the polymer guide hole 23 of the dispersion plate 2.

In this case, the flow path of the polymer is not complicated as in the conventional case and flows uniformly toward the outer circumference, and the structure of the apparatus itself is relatively simple, and there is no place where it becomes a dead space. Therefore, heat deterioration and gelation due to generation of polymer retention part do not occur, and it is possible to stably manufacture high quality products, improve the filtration effect and extend the service life.

[0022]

[Effect of the device]

 As described above, according to the present invention, the problems of heat deterioration and gelation due to the generation of the polymer retention part, which are the conventional drawbacks, are solved, and filtration by improving the polymer distributability on the die is performed. It is possible to improve the effect and extend the service life, and it is possible to obtain high quality products stably over a long period of time.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is an explanatory view including a partial cross section of the leaf disc filter of FIG.

[Explanation of symbols]

 1 Filter Case 2 Distribution Plate 4 Spinneret 7 Cavity 8 Filter Main Body 9 Leaf Disc Filter 10 Filter Media 11 Spacer 14 Inner Circumferential Hub Ring 15 Polymer Introducing Groove 16 Outer Circular Hub Ring 17 Polymer Outlet Hole 18 Polymer passage 20 Polymer supply passage 21 Polymer supply chamber 22 Discharge hole 23 Polymer guide hole

Claims (1)

[Claims for utility model registration] [Claim 1] The filter case, the distribution plate and the spinneret retainer are integrally connected, and a spinneret having a discharge hole is sandwiched between the distributor plate and the spinneret retainer. A spinneret pack for melt-spinning, in which a filter main body formed by laminating at least one doughnut-shaped flap disk filter having a thick inner and outer peripheral portions in a hollow portion of a filter case is arranged. Then
Reel corresponding to the polymer inlet on the upper part of the filter case
The hollow space at the center of the hood disc filter communicates with each other to form a polymer supply path to the filter body, and the space formed between the hood disc filter and the polymer supply chamber serves as a polymer supply chamber. A polymer passage is formed between the cavity portions of the filter case, and a groove for introducing a polymer into the polymer supply chamber and a polymer are formed in the relief disk filter.
A spinneret pack for melt spinning characterized in that outlet holes to the passages are provided radially, and the polymer passages communicate with the polymer guide holes provided circumferentially on the distribution plate.