JPH0556965U - Spinneret pack for melt spinning - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a base pack which can prevent generation of heat-degraded polymer and poor distribution. [Structure] A doughnut-shaped leaf disk filter 9 is laminated on a filter case 1 of a cap pack, and a polymer is introduced from a supply passage 20 through an introduction groove 15 of the filter 9 into a supply chamber 21. Fill up. A conical projection 2a is provided at the lower end which is the end of the supply path 20 to make the distribution and supply of the polymer in the lower part smooth. The polymer that has passed through the filter medium 10 and is filtered is radially dispersed toward the outer periphery at the position of the spacer 11 and is led out from the outlet hole 17 of the outer peripheral hub ring 16 to the passage 18, and is dispersed from the center of the filter 9 toward the outer periphery. The polymer thus obtained is distributed directly on the base 4 through the guide hole 23 of the distribution plate which is formed in a circumferential shape without squeezing it in one place.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a spinneret pack for a melt-spinning apparatus, and in particular, it is configured to spin a large number of synthetic fibers from a single spinneret plate, and a filter section is composed of a leaf disc filter. It relates to the improvement of the base pack.

[0002]

[Prior Art]

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

Conventionally, the filter provided in the spinneret pack is generally a flat plate obtained by sintering a wire mesh or a metallographic nonwoven fabric mat, but in recent years, the filtration efficiency of the introduced polymer is improved. Therefore, a mouthpiece pack device has been proposed in which a filter device in which a plurality of leaf disc filters are laminated is provided in the mouthpiece pack to form a wide filtration surface to improve the filtration effect and extend the service life. (Actual Publication No. 57-31160, Actual exploitation No. 63-140074, etc.).

All of these conventional mouthpiece packs are housed and arranged in the cavity of the filter case. In the filter device, a leaf disk filter is laminated in multiple layers between the head disk and the bottom disk. It is configured by being sandwiched by a center rod that penetrates 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. Through the respective leaf disc filters, and the polymer flow is narrowed to one location at the center of the bottom disc through the filtration polymer flow passage formed on the outer circumference 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 performed from the center 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 has been made in order to eliminate the above-mentioned drawbacks in the prior art. Therefore, 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 filtered by the leaf disc filter is directly distributed to the upper part of the outer periphery of the die nozzle where the retention part is liable to be generated, without once confining it to one place, so that heat-degraded polymer is generated or the distribution is poor. It provides a base pack that can eliminate

[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. The filter main body, which is formed by laminating at least one doughnut-shaped leaf disc filter, is housed in the cavity of the filter case, and the polymer on the upper part of the filter case is placed. A distribution plate that corresponds to the inlet hole and communicates with the hollow space in the center to form a polymer supply path to the filter main body and faces the polymer supply path below the filter case. In addition to providing a conical projection on the base, the space formed between the leaf disc filters serves as a polymer supply chamber, and a polymer passage is provided between the filter body and the filter case cavity. Formed and further lifted The polymer filter is provided radially with a polymer introduction groove into the polymer supply chamber and a polymer passage opening into the polymer passage, and the polymer passage is communicated with a polymer guide hole provided circumferentially in the distribution plate. This is a spinneret pack for melt spinning.

[0009]

[Action]

 According to the present invention, at least one doughnut-shaped leaf disk filter is laminated in the cavity of the base of the mouthpiece pack, and the polymer is formed in the center inner circumference of these filters. From the side to the outer side, and the polymer dispersed radially from the center of the leaf disc filter to the outer side is passed through the distribution plate perforated circumferentially without squeezing it in one place and directly on the base. 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 it is for a spin pack of another shape, or the same can be performed even if the shape of the part or the design is changed.

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 of 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 holder, which are integrally connected by a bolt 5 and between the distribution plate 2 and the cap holder 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 formed therein, and the hollow space 7 has a diameter slightly smaller than that of the hollow chamber 7 via the lower surface. A filter main body 8 to be described later is accommodated concentrically. The filter body 8 is constructed by stacking at least one doughnut-shaped leaf disc filter 9 having a thick inner and outer peripheral portion 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.

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

Although the leaf disc filter 9 preferably has the above-mentioned structure, it is not limited to this and various other known shapes and 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 the middle portion of the outer hub ring 16, and the inlet grooves 15 are provided with a polymer inlet hole 19 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 metal mesh 13 portion).

The leaf disc filter 9 as described above 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 introduction hole 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 to further form a leaf disc filter 9 and a relief disc filter 9. A polymer supply chamber 21 for the filter medium 10 is formed between the disc filter 9 and between the leaf disc filter 9 and the filter case 1 or the distribution plate 2.

Furthermore, a conical projection 2 a is vertically provided on the distribution plate 2 which is the terminal end of the polymer supply path 20, corresponding to the center position of the polymer supply path 20.

Further, a polymer guide hole 23, which communicates with a 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 into the polymer introduction hole 19 is supplied from the polymer supply passage 20 through the introduction groove 15 of the leaf 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, if the surface of the distribution plate 2 that is the end of the polymer supply path 20 is a flat, the polymer is supplied to the polymer supply chamber 21 formed by the lowermost leaf disc filter 9 and the distribution plate 2. Has a poor inflow property, and a flow amount difference occurs between the polymer introducing groove 15 provided on the lower surface of the inner peripheral hub ring 14 and the polymer flowing from the polymer introducing groove 15 provided on the upper surface, resulting in pressure imbalance. Therefore, there is a tendency that the filter is broken due to the above-mentioned phenomenon, or that the deterioration of the polymer due to defective retention due to the formation of the dust space is likely to occur.

For this reason, a conical protrusion 2 a is provided on the dispersion plate 2 corresponding to the polymer supply path 20 so as to be located at the central position of the polymer supply path 20 substantially vertically to the dispersion plate 2. ..

By providing the projections 2a in this way, the above-mentioned problems are solved, and the polymer inflow property of the lowermost leaf disc filter 9 into the supply chamber 21 is further improved.

It is preferable that the apex angle θ of the conical projection 2a is in the range of 40 ° ≦ θ ≦ 60 ° from the viewpoint of flowability, and the diameter D of the bottom surface is the polymer supply of the filter-9. It is preferable that 0.3 ≦ D / d ≦ 0.6 with respect to the diameter d of the passage 20 (inner diameter of the inner hub ring 14). If D / d is larger than 0.6, the polymer flow path that flows into the lower surface of the leaf disc filter 9 in the lowermost layer is reduced and the flow resistance increases, which may adversely affect the flowability. .. On the other hand, if it is smaller than 0.3, the merits of forming the protrusions are small and it cannot be said to be effective.

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

In addition, as the performance of yarns and the need for high-speed spinning have been increasing in recent years, in order to eliminate the unevenness of each of the multi-threads spun from the spinneret, the polymer in the pack is eliminated. However, a static kneader or a mixer may be inserted into the polymer introduction hole 19 or the polymer guide hole 23 of the spinning pack in this embodiment.

[0028]

[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.

3 is an explanatory view including a partial cross section of the leaf disc filter of FIG. 1. FIG.

[Explanation of symbols]

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

Claims (1)

[Scope of utility model registration request] 1. A spinneret pack for melt spinning in which a filter case, a distribution plate and a spinneret retainer are integrally connected, and a spinneret having a discharge hole is sandwiched between the distributor plate and the spinneret retainer. The filter case, in which at least one doughnut-shaped leaf disk filter is laminated in the cavity of the filter case, is housed and arranged.
The space between the leaf disk filter and the hollow space in the center is connected to the polymer introduction hole at the top of the filter to serve as a polymer supply path to the filter body, and to the polymer supply path below the filter case. A conical projection is provided on the facing distribution plate, and the space formed between the leaf disc filters serves as a polymer supply chamber, and the polymer is provided between the filter body and the filter case cavity. Forming a passage, and further
The fudisk filter is radially provided with a polymer introduction groove to the polymer supply chamber and a discharge hole to the polymer passage, and the polymer passage is communicated with a polymer guide hole provided circumferentially on the distribution plate. A spinneret pack for melt spinning characterized by the above.