JPH03241002A - Breaker plate and its production - Google Patents

Abstract

PURPOSE:To obtain a breaker plate capable of eliminating the residence of resin on the upstream-side of the breaker plate and effectively using the supporting filter for filtration by stacking a plurality of plates each having a number of perforations separated from each other by crosspieces having a specific width. CONSTITUTION:The objective breaker plate 10 is produced by stacking a plurality of plates 11 of 0.1-2mm thick and integrating the stacked plates by diffusion bonding or sintering. Each plate has a number of perforations 12, 12A having a maximum dimension of 0.3-2mm and separated by crosspieces 13, 13A of 0.1-2.0mm width. Since there is no wide flat face on the surface supporting a filter, the residence of polymer on the breaker plate can be prevented. The breaker plate 10 is placed in a pack case 1 composed of a nozzle plate 2 and an adopter 5 and a filter layer 4 is formed on the breaker plate.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a breaker plate used in a synthetic fiber melt spinning apparatus, a synthetic resin extrusion molding apparatus, etc., and a method for manufacturing the same.

[Conventional technology]

As shown in FIG. 4, a spinning device for synthetic fibers such as polyester and polyamide has a spinneret plate 2, which is provided with a large number of nozzle holes 2a in a pack case 1. Multiple through holes 3a
Breaker plate with 3. Accommodates filtration layer 4 etc. 2
A cap pack is used in which these are fixed with an adapter 5 having a passage 5a. The breaker plate 3 used here has a shape in which a plurality of circular through holes 3a penetrating vertically are provided in a single metal disc having a depth of usually 20 to 50 holes. Moreover, the filtration layer 4.

It is composed of a laminate of a wire mesh or nonwoven fabric 4a, a sand material 4b, and a wire mesh or nonwoven fabric 4C. In this cap puncture, polymer flows from the passage 5a of the adapter 5.

After being filtered through the filtration layer, it passes through the breaker plate 3.

It is spun out from the nozzle hole 2a of the spinneret plate 2.

(Problem R to be solved by the invention) However, since the conventional breaker plate 3 has a configuration in which a circular through hole is formed in a thick metal plate, the upper surface thereof is a large flat surface without holes (surrounded by the through holes). It was found that there was a problem in that the large flat surface caused the polymer to stagnate, and that the stagnation caused thermal deterioration of the polymer and reduced its quality.

In addition, this large flat surface supports the filter medium made of wire mesh or nonwoven fabric 4a, but the portion supported by the flat surface is not effectively used for filtration, and therefore the effective filtration area is significantly reduced. There were also problems.

The present invention has been made in view of these conventional techniques.

It is an object of the present invention to provide a breaker plate that eliminates stagnation upstream of the breaker plate and allows a supported filter medium to be effectively used for filtration.

Another object of the present invention is to provide a method for manufacturing the above-mentioned breaker plate.

[Means to solve the problem]

As a result of intensive studies to solve the above problems, the present inventors found that
The present invention was achieved by discovering that holes of arbitrary shapes can be easily formed by constructing the breaker plate with a laminate of thin plate materials that are easy to process. In other words, one aspect of the present invention is.

fil A breaker plate formed by stacking a plurality of plate materials each having a large number of openings partitioned by crosspieces having a width of 0.1 to 2.0 m.

(2) Manufacture of a breaker plate characterized by forming a large number of openings of a predetermined shape and size in a thin plate material, overlapping a plurality of the plate materials, and making the whole into an integral structure by diffusion bonding or sintering. The method is summarized.

The present invention will be explained in more detail with reference to the following two drawings.

In FIG. 1, 1 (breaker play of the present invention) 10 is 1
A large number of openings 12 separated by narrow partitions or crosspieces 13
It has a structure in which a plurality of plate materials 1) are laminated. Although this plate material 1) may be simply stacked, it is preferable to join the whole plate to form an integral structure.

The opening 12 may be provided on the entire surface of the plate 1), but it is preferable not to form an opening on the outer periphery as shown in the figure 1, leaving an annular non-porous portion 1) a. When it is attached to a container, its outer circumferential portion is fixed, so it is preferable to have a non-porous portion 1)a in this portion because there will be no polymer retention portion.

A large number of openings 12 formed in the plate material 1) are surrounded by narrow crosspieces 13 of substantially uniform width.

The shape of the opening is not particularly limited.

For example, the square opening 12A5 shown in FIG.
It is preferable to use a polygonal shape like the hexagonal opening 12B shown in Fig. It becomes possible to form an opening with a uniform size throughout.As shown in FIG.
A configuration may be adopted in which the width of 3C is constant.

The crosspieces 13 (13A, 13B, 13C, etc.) between the openings support a filter medium thereon, as will be described later.

When the width t of this crosspiece 13 increases, the flat surface of the top surface of the crosspiece becomes large, causing retention of polymer, and
This will reduce the filtration area of the supported filter media.

For this reason, it is preferable that the width t be as small as possible; however, if it is too small, the strength will be insufficient. Considering these, in the present invention, 0.1 to 2. On, preferably about 0.3 to 1.0 fi.

What is the size of the openings 12 (12A, 12B, 12C, etc.)?

The larger the size, the larger the overall aperture ratio and the larger the effective filtration area of the supported filter medium. However, if the openings are made larger, the support strength of the filter media by the crosspieces 13 decreases, and the filter media collapses into the openings 12 due to the filtration pressure, resulting in deformation. Considering these, the maximum dimensions (dimensions d+, ds, ds, etc.) of the opening 12 are O03~2
The length is preferably 0.3 to 1.5 m, and more preferably 0.3 to 1.5 m.

The shape, aperture ratio, etc. of the opening 12 and the crosspiece 13 may be constant over the entire surface of the plate 1), or may be changed partially as necessary.6For example, the opening in the center of a circular plate 1) The aperture ratio may be smaller than the aperture ratio of the two peripheral parts.

To change the aperture ratio, the size of the aperture 12 may be changed.

All you have to do is change the width of the partition 13. In this way, by making the aperture ratio of the central part smaller than the aperture ratio of the peripheral part, a large resistance is given to the central part of the polymer passing through the breaker plate 10, and the polymer flows through the die pack incorporating the breaker plate 10. The plug flow properties of the polymer can be improved. When the plug flow properties of the polymer in the gold pack are improved, the thermal history of the polymer spun from each nozzle hole becomes uniform, making it possible to obtain yarn of uniform quality. can.

The thickness of the plate material 1) is usually selected to be about 0.1 to 2 mm, preferably about 0.3 to 0.5 mm. If the thickness of the plate material 1) becomes thinner than 0.1 mm, the number of plate materials 1) constituting one breaker plate becomes too large, making manufacturing difficult and increasing costs. On the other hand, this thickness is 2m
If it exceeds this, it becomes extremely difficult to manufacture an opening having the above-mentioned shape with the desired precision, and this causes an increase in cost. The thickness of the plate material 1) is determined as described above in consideration of these points.

A plurality of plates 1) having a large number of openings 12 are stacked on top of each other to constitute one breaker plate IO.

The thickness of the breaker plate 10 is determined by taking into consideration the strength required to support the filter medium, 2 the resistance to be given to the polymer passing through it, etc. 6. The thickness of the breaker plate 10 used in a gold pack is usually about 20 to 50 m. selected.

The play car plate 10 of the present invention is suitably used for puncturing a melt spinning nozzle, but in addition to this use, it can also be used, for example, as a play car plate placed between an extruder and a goo in an extrusion molding machine. It is.

Next, a method of the present invention for manufacturing the breaker plate of the present invention will be explained.

First, a thin non-porous plate is prepared, and an opening 12 of a desired shape is formed in the plate by etching.

Etching has the advantage that openings of arbitrary shapes can be easily formed. The thickness of the plate material in which the opening is formed by etching is about 0.1 to 1-1, especially 0.3 to 0.5 m.
Preferably 0 Next, the desired number of plate materials 1) with openings formed therein are stacked one on top of the other, and then the whole is heated under pressure.
Diffusion bonding is performed between each plate material to integrate the whole. In addition.

Each plate material may be joined by sintering and the whole may be integrated. Next, the outer shape of the integrated plate material 1) is shaped into a desired shape.

By machining to achieve dimensional accuracy of 0 or more.

A structural breaker plate 10 is formed. Here, when diffusion bonding or sintering is used to join the plurality of plates 1), the advantage is that the bonding strength is high, and since no voids are created between the plates, the polymer does not accumulate.

Note that the breaker plate of the present invention can be manufactured not only by the above method but also by other methods. For example, the openings in the plate material may be formed by electric discharge machining or the like.

[Effect]

In the breaker plate having the above structure, the crosspiece 13 located between the openings 12 on the top surface is extremely narrow.
Since it is ~2.0u, the flat surface of the upper surface of this crosspiece is extremely small, and no polymer retention occurs in this part.

Therefore, occurrence of thermal deterioration due to stagnation is extremely low.

Also, the filter media placed on the top surface of the breaker plate.

Because it is supported only by the narrow crosspiece of the play car plate.

Most of the filtration area can be effectively used for filtration.

Note that the size of each opening may be reduced by 1, for example, if the maximum dimension is 0.
If it is 3 to 2■, the filter media will be supported at short intervals,
It does not collapse into the opening and deform due to filtration pressure, allowing stable filtration over a long period of time.

Furthermore, in the method of the present invention, since the openings are formed in a thin plate material, openings of arbitrary and minute shapes can be easily formed by, for example, etching.

In addition, by layering a plurality of plates and diffusion bonding or sintering them, it is possible to easily manufacture a one-piece breaker plate having the necessary strength.

〔Example〕

A preferred embodiment of the present invention shown in one drawing will be described below.

FIG. 3 shows a breaker plate 1 according to an embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view showing a puncture of the cap using 0.

Components that are the same as those of the conventional cap pack shown in FIG. 4 are designated by the same reference numerals. In Fig. 3, ■ is a puncture case, 2 is a base plate with a large number of nozzle holes 2a, 1
0 is a breaker plate which is an embodiment of the present invention.

4 is a filtration layer supported by a player plate 10, which includes wire mesh or nonwoven fabric 4a, sand 4b, wire mesh or nonwoven fabric 4
It is composed of 0 etc. 5 is an adapter provided with a passage 5a, and by being screwed into the puncture case 1, the filtration layer 4. A breaker plate 101, a gold plate 2, etc. are fixed. Breaker play) 10 is shown in Figures 1 and 2.
It has the configuration described with reference to the figures.

In the mouthpiece back incorporating the breaker plate 10 having the above configuration, polymer flows from the passage 5a of the adapter 5, is filtered by the filtration layer 4, and then enters the breaker plate (breaker plate).
10 and is spun out from the nozzle hole 2a of the 50 gold plate 2. Here, the upper surface of the breaker plate 10 acts as a support surface that supports the filtration layer 4. Therefore,
Since the narrow crosspiece 13 on the upper surface of the breaker plate 10 supports the wire mesh or nonwoven fabric 4a of the filtration layer 4, polymer retention does not occur in this portion.

Moreover, almost 100% of the filtration area is utilized. Furthermore, opening 1
2 is much smaller than the through holes of conventional breaker plates, so even when used for high viscosity materials, the wire mesh or nonwoven fabric 4a will not sink into the opening 12 and be deformed. Good filtration is performed, and no heat-degraded products are generated, making it possible to obtain high-quality products.

In addition, if the breaker plate 10 used here is one in which the aperture ratio of the central part is smaller than that of the peripheral part, it will give a large resistance to the central part of the polymer within the 3-Rokin puncture. be able to. Generally, in a die pack, the flow velocity of the polymer on the outer periphery tends to be slow due to resistance from the wall surface, and therefore polymers with different thermal histories are spun from the die plate.
The use of a plate has the advantage of making the flow uniform within a single metal pack by suppressing the flow velocity in the center.

〔Effect of the invention〕

As explained above, the breaker plate of the present invention is
Since there is no wide flat surface on the surface supporting the filter medium, it is possible to prevent the polymer from stagnation, and the filter medium on the breaker plate can be used extremely effectively for filtration.

In addition, in the method of the present invention, since the openings are formed by processing a thin plate material, it is possible to easily form openings in arbitrary and fine shapes by, for example, etching. By diffusion bonding or sintering, it is possible to easily manufacture a breaker plate having a monolithic structure with the necessary strength.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing one example of the breaker plate according to the present invention, FIG. Fig. 3 is a schematic sectional view of a cap back using the breaker plate shown in Fig. 1, and Fig. 4 is a schematic sectional view of a punctured cap using the conventional breaker plate. 1-Punctured cap, 2-Puncture cap Plate, 3-Breaker plate, 4-Filtration layer, 5-Adapter, 10... Breaker plate, 1)-Plate material, 12, 12A, 12B, 1
2C, 12I) -- Ichinosekiguchi, 13.13A, 13B. 13 C-piece.

Claims (2)

[Claims] (1) A breaker plate made of a plurality of stacked plates each having a large number of openings separated by crosspieces with a width of 0.1 to 2.0 mm. (2) A method for manufacturing a breaker plate, which comprises forming a large number of openings of a predetermined shape and size in a thin plate, stacking a plurality of the plates, and forming the whole into an integral structure by diffusion bonding or sintering. .