JPH04300309A - Resin-feeding device - Google Patents

Abstract

PURPOSE:To provide the subject compact device having an increased opening degree and provided with a melted resin-filtering section and with a melted resin-kneading section, the filtering section comprising a filter and a breaker plate for supporting the filter in the main body of the device, the breaker plate comprising many pipes fixed in parallel in the outer cylinder. CONSTITUTION:In a resin-feeding device employed in a melt-spinning device or extrusion-molding device for thermoplastic resins such as polyesters or polyamides and having a filtration section 1a for filtering a melted resin with a filter 3 and a kneading section 1b for kneading the melted and filtered resin, a breaker plate 5 for supporting the filter 3 in the main body of the device is installed, and the breaker plate 5 is constituted of an outer cylinder 7 and plural pipes 8 fixed mutually in parallel in the opening 7a of the outer cylinder 7 along the axial line thereof, thereby increasing the opening degree of the breaker plate 5 and compacting the device.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin supply device used in a melt spinning device for synthetic fibers of thermoplastic resins such as polyester and polyamide, an extrusion molding device for synthetic resins, and the like.

0002

2. Description of the Related Art For example, there is a resin supplying apparatus for producing synthetic fibers by a melt spinning method as disclosed in Japanese Patent Application Laid-Open No. 64-40613. In that device, a molten thermoplastic resin is introduced from the inlet of the device to a filtration section while being metered at a constant rate. The filtration section is provided with a sand made of fine-grained filter material, a wire mesh filter that supports the sand, and a breaker plate that supports the wire mesh filter together with the sand. The breaker plate has a large number of through holes each having a diameter of 3 to 6 mm, which are formed by drilling parallel holes in a metal plate of a predetermined thickness using a drill press, lathe, etc., and then reaming the holes.

For example, the diameter of the effective area of the breaker plate through which the molten resin can pass is set to 96 mm, and the diameter of each hole is set to 6 mm.
If the number of holes is 76, the aperture ratio (total open area of the holes/effective area) of the through holes is about 30%. The pore size can be increased by decreasing the pore diameter and increasing the number of pores, but for example, if the pore size is 3 mm and the porosity is 30%, which is the same as above, the number of pores will be 304, and if you try to further increase the number of pores. Then, the processing cost increases when drilling with a drill press, lathe, etc., and it is difficult to increase the hole-opening ratio to 30% or more when drilling holes in a metal plate.

[0004] Furthermore, if the porosity is low, the breaker plate will have a relatively wide flat surface between each through hole, and the molten resin will tend to stay on the flat surface. When the molten resin stagnates, thermal deterioration of the molten resin occurs, resulting in a problem that the spinning quality deteriorates.

[0005]

[Problems to be Solved by the Invention] In view of the problems of the prior art, the main object of the present invention is to provide a resin supply device that can improve the pore area ratio without increasing processing costs. There is a particular thing.

[0006]

[Means for Solving the Problems] According to the present invention, the present invention provides a filtration section for filtering molten resin through a filter medium, and a kneading section for kneading the filtered molten resin. A resin supply device comprising: a breaker plate for supporting the filter medium on the device main body; and a plurality of breaker plates fixed in parallel to each other along the axis of the outer cylinder in a hole of the outer cylinder. A resin supply device characterized by having a pipe, or a resin supply device having a filtration section for filtering the molten resin through a filter material, and a kneading section for kneading the filtered molten resin. The kneading section includes a plurality of stacked outer cylindrical bodies, and a plurality of holes fixed in parallel to each other along an axis in each of the outer cylindrical bodies and having different hole diameters for each of the outer cylindrical bodies. A resin supply device characterized by having a pipe, or a resin supply device having a filtration section for filtering molten resin through a filter material, and a kneading section for kneading the filtered molten resin. A breaker plate for supporting the filter medium on the apparatus main body is fixed to a plurality of stacked outer cylinders and in a hole in each of the outer cylinders parallel to each other along an axis, and This is achieved by providing a resin supply device characterized in that each outer cylinder has a plurality of pipes with different hole diameters so that the resin supply device also serves as the kneading section. In particular, the kneading section
It is preferable to further include a layer containing only the outer cylinder.

[0007]

[Function] In this way, a breaker plate with a large number of through holes can be easily manufactured by simply fixing a large number of pipes in parallel to each other within the holes of the outer cylinder, and the metal plate There is no need to drill numerous holes. Furthermore, by using a relatively thin-walled pipe, the porosity can be improved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic cross-sectional view showing a melt spinning apparatus 1 as a resin supply apparatus to which the present invention is applied. The molten resin melted in a melting section (not shown) is metered in a certain amount and is passed from the inlet passage 2 provided at the upper part to the filtration section 1a.
It is designed to be guided within. In the filtration section 1a, a sand 3 made of fine granular filter material is supported by a wire mesh filter 4. Furthermore, in order to prevent the wire mesh filter 4 from bending due to the weight of the sand 3, the wire mesh filter 4 is attached together with the sand 3. A supporting breaker plate 5 is provided. Note that the breaker plate 5 has a large number of through holes through which the filtered molten resin passes. The molten resin that has passed through the filtration section 1a is guided through a passage 6 below the breaker plate 5 to the kneading section 1b consisting of a static mixer, where it is kneaded and then discharged in the form of a thread from the lower mouthpiece 1c.

As shown in FIG. 2, the breaker plate 5 includes a cylindrical outer body 7 having an inner diameter of 96 mm, for example, and a hole 7 therein, which is opened to ensure an effective area for passing the molten resin.
It consists of a large number of pipes 8 fixed in parallel to each other and packed together along the axial direction. Further, the pipe 8 has an inner diameter of 4 mm and an outer diameter of 5 m, for example.
Good as m. According to these dimensional conditions, the porosity becomes approximately 68%, which can be greatly improved compared to the conventional example. Therefore, retention of molten resin can be reduced as much as possible.

The pipe 8 can be press-fitted into the hole 7a without any gaps and fixed, but if it is not held in the hole 7a by the pressure welding force, for example, diffusion bonding or A pipe 8 is inserted into the hole 7a by brazing with copper brazing or welding with laser or the like.
It may be fixed by welding. Note that the pipe 8 has weld beads and the like removed from its inner peripheral surface during pipe manufacturing, and its surface roughness has been processed to a level higher than average finish, so that the molten resin passing through the pipe 8 is Use one that is finished to the extent that it does not stagnate. In order to manufacture the breaker plate 5 formed by combining the outer cylinder 7 and the pipe 8 as described above, the outer cylinder 7 and the pipe 8 are each cut to a predetermined thickness of the breaker plate 5. However, the outer cylinder body 7 and the pipe 8 may be assembled in a relatively long state and then cut to a predetermined thickness.

FIG. 3 shows an example in which the hole 9a of the outer cylinder 9 has a hexagonal shape. By doing so, the pipes 8 can be suitably arranged and housed. Therefore, it is not limited to a hexagonal shape, but may be a polygonal shape. The opening area of the hexagonal hole 9a is set to be larger than the effective area for passing the molten resin shown by the imaginary line in the figure. Further, by replacing the pipe 9a that spans the outer periphery of the effective area with a solid rod, it is possible to prevent the molten resin from staying outside the effective area. Incidentally, the thick axial end face of the pipe 8 is generally formed flat. Therefore, in order to prevent the molten resin from staying in the flat part, it is preferable to chamfer the axial end face toward the inner circumferential side.

FIG. 4 shows the breaker plate 5 and FIG.
As shown in FIG.
and a second breaker plate 12 arranged in the same manner as described above are alternately stacked and integrated.
FIG. In this example, the inner diameter of the pipe 11 used for the second breaker plate 12 is preferably about 2 to 3 times the inner diameter of the pipe 5, for example. In the embodiment shown in FIG. 4, when the molten resin that has passed through the second breaker plate 12 passes through the next breaker plate 5, the hole diameter of the pipe changes from a thick one to a thin one, so the molten resin is divided by the wall of the pipe 8. , further below, merge within the large-diameter pipe 11 of the second breaker plate. By repeating division and merging in this way, a kneading effect can be obtained. Therefore, since the breaker plate body 10 alone can support the sand 3 and also knead the molten resin, there is no need to provide a kneading section downstream of the breaker plate body 10, and the apparatus can be made more compact.

Furthermore, by inserting a known static mixer in the pipe 8, which is made up of a combination of rectangular plates twisted by 180 degrees and elements with different twist directions, the kneading effect can be further improved. A breaker plate having the following properties is obtained.

FIG. 6 shows a structure in which the second breaker plate 12 and the breaker plate 5 described above are laminated as one layer, and these are laminated in multiple layers with only the outer cylinder 7 interposed therebetween. By doing this, the second
The breaker plate 12 and the breaker plate 5 are stacked to form a breaker plate that supports the sand 3, and the uppermost one and the outer cylinder 7 below are provided through a space 13 only. Each breaker plate 5
- 12 can also serve as a kneading section for repeating division and merging of molten resin through the layers of the space section 13.

Furthermore, even if only the breaker plate 5 and the outer cylindrical body 7 are repeatedly laminated as shown in FIG.
The same kneading effect can be obtained. In this case,
Second breaker plate 1 instead of breaker plate 5
It goes without saying that the same effect can be obtained even if 2 is used.

In addition, in the case where the breaker plate 5 and the kneading section 1b are configured separately as shown in FIG. 1, the laminate shown in FIG. 4 or the laminate shown in FIG. The body may be provided as a static mixer.

[0018]

As described above, according to the present invention, since the porosity of the breaker plate can be improved, retention of molten resin in the breaker plate can be prevented as much as possible, and for example, spinning quality in a melt prevention device can be improved. It can be improved. Furthermore, since pipes are used, a large number of small diameter holes can be provided without drilling holes in a metal plate, and the manufacturing cost can be lowered compared to those in which holes are drilled in a metal plate. Furthermore, by combining breaker plates using pipes with different diameters, or by layering only cylindrical bodies, it is possible to mix the molten resin without providing a separate kneading section. The effect is extremely large.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing a filtration section of a melt spinning apparatus to which the present invention is applied.

FIG. 2 is a partial plan view of a breaker plate according to the invention.

FIG. 3 is a plan view similar to FIG. 2 showing another embodiment of the breaker plate.

FIG. 4 is a schematic cross-sectional view showing a breaker plate body formed by combining breaker plates.

FIG. 5 is a plan view similar to FIG. 2 showing a breaker plate using a large diameter pipe according to the present invention.

FIG. 6 is a schematic cross-sectional view showing a second breaker plate body formed by combining breaker plates.

FIG. 7 is a schematic cross-sectional view showing a third breaker plate body formed by combining breaker plates.

[Explanation of symbols]

1 Melt spinning equipment 1a Filtration section 1b Filtration section 1c Base part 2 Entrance passage 3 Sand 4 Wire mesh filter 5 Breaker plate 6 Passage 7 Outer cylinder body 7a hole 8 Pipe 9 Outer cylinder body 9a hole 10 Breaker plate body 11 Pipe 12 Second breaker plate 13 Space section

Claims (4)

[Claims] 1. A resin supply device comprising: a filtration section for filtering molten resin through a filter material; and a kneading section for kneading the filtered molten resin; A resin supply device characterized in that a breaker plate for supporting has an outer cylindrical body and a plurality of pipes fixed in parallel to each other along an axis of the outer cylindrical body within a hole of the outer cylindrical body. 2. A resin supply device comprising a filtration section for filtering molten resin through a filter medium and a kneading section for kneading the filtered molten resin, the kneading section comprising:
It is characterized by having a plurality of laminated outer cylinders, and a plurality of pipes fixed parallel to each other along the axis in the holes of each of the outer cylinders and having different hole diameters for each of the outer cylinders. Resin supply device. 3. The resin supply device according to claim 2, wherein the kneading section further includes a layer consisting only of an outer cylinder. 4. A resin supply device comprising: a filtration section for filtering molten resin through a filter material; and a kneading section for kneading the filtered molten resin; A breaker plate for supporting is fixed to a plurality of stacked outer cylindrical bodies and parallel to each other along an axis in a hole in each of the outer cylindrical bodies, and has a plurality of hole diameters that are different from each other for each of the outer cylindrical bodies. 1. A resin supply device characterized by having a pipe which also serves as the kneading section.