JPH084696B2 - Wire mesh laminated filter and manufacturing method thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire mesh laminated filter suitable for filtering minute dusts from a high pressure fluid, such as a case of filtering a molten polymer in the production of chemical fibers, and a laminated mesh filter thereof. The present invention relates to a manufacturing method.

[0002]

2. Description of the Related Art Conventionally, when fine particles of dust are filtered and the pressure of the fluid is high, such as in the case of filtering a molten polymer in the production of chemical fibers, it is conventionally made by sintering a fine powder alloy. A filter was used. However, this sintered alloy filter is expensive because the material cost and the processing cost are high, and moreover, the ratio of metal particles in the total volume is high and the function of taking dusts inside the filter is low, so dusts are not generated. There is a problem that it tends to adhere to the surface of the filter and is apt to be clogged, so that it has to be removed from the device and frequently washed again or replaced, which increases running cost.

Therefore, a wire mesh laminated filter which is low in both material cost and processing cost is considered, and as an example thereof, Japanese Utility Model Laid-Open No. 53-4376 discloses a wire mesh having different mesh roughness. Described that a unit filter plate is formed by stacking multiple layers and sintering the whole in that state, stacking a plurality of these filter plates, and holding the periphery by a rim body made of synthetic resin. Has been done. According to this prior art, since the entire filter is composed of a large number of wire mesh layers, it is possible to filter minute dusts, and the presence of the coarse wire mesh also improves the strength.

[0004]

When manufacturing a filter plate in this prior art, a large number of wire nets punched in a warp plane shape are stacked and sintered, but in this way, the wire net is simply In the case of the multi-layered structure, there is a problem that handling in the manufacturing process is troublesome because the stacked state must be maintained by some means in the manufacturing process. The present invention aims to solve this problem.

[0005]

In order to achieve this object, the invention according to claim 1 is that "a top wire mesh layer located at the uppermost layer, a bottom wire mesh layer located at the lowermost layer, and upper and lower wire mesh layers are provided. A wire mesh composed of a plurality of internal wire mesh layers sandwiched, and the upper and lower wire mesh layers have the same mesh roughness, while at least a part of the inner wire mesh layers has different mesh roughness from the upper and lower wire mesh layers. In the laminated filter, at least each inner wire mesh layer among the wire mesh layers is formed into a plurality of layers by folding the material wire mesh appropriately times.
The upper surface wire netting layer and the lower surface wire netting layer are integrally continuous, and the upper and lower wire netting layers that are continuous integrally enclose the plurality of internal wire netting layers as a whole, and in this state, the wire netting layers that are interconnected are closely attached to each other. I'm holding it. "

The invention according to claim 2 provides, as a method of manufacturing the filter according to claim 1, "a plurality of material wire nets for an inner wire mesh layer are prepared, and each of the material wire meshes is folded to obtain a plurality of inner wire meshes. After forming a layer, the plurality of internal wire mesh layers are superposed, and the whole is wrapped with a material wire mesh for upper and lower wire mesh layers to form a filter intermediate, and then the filter intermediate is formed into a cylindrical shape. After fitting into the female mold, by inserting the male mold into the female mold, the filter intermediate body is flatly crushed into the same shape as the male mold cross-sectional shape, thereby adjusting the planar shape and Adhere wire rods of adjacent wire mesh to each other ”.

Further, the invention according to claim 4 is "comprising an upper surface wire mesh layer positioned at the uppermost layer, a lower surface wire mesh layer positioned at the lowermost layer, and a plurality of internal wire mesh layers disposed between the upper and lower wire mesh layers. , The upper and lower wire mesh layers have the same mesh roughness, but at least a part of the plurality of inner wire mesh layers has a mesh roughness different from that of the upper and lower wire mesh layers. By preparing the material wire mesh of the above and folding them, a plurality of internal wire mesh layer laminates having an area larger than the plane area of the filter are formed, and then these internal wire mesh layer laminates are stacked, and then the above A laminate of the internal wire mesh layer laminates is wrapped with an integral material wire mesh that constitutes the upper surface wire mesh layer and the lower surface wire mesh layer,
In that state, the whole is pressure-bonded into a flat plate shape to form an intermediate laminated plate having a larger flat area than the filter, and then the intermediate laminated plate is punched into a planar shape of the filter by a pressing device. did.

[0008]

According to the first and second aspects of the present invention, the inner wire mesh layer is wrapped by the upper and lower wire mesh layers that are integrally continuous, so that the wire mesh layer does not require any special means in the manufacturing process. It is possible to maintain the superposed state, and therefore, it is possible to improve the easiness of handling such as carrying and storing in the manufacturing process and improve the working efficiency. In addition, since the whole is wrapped with the upper and lower wire mesh layers that are continuous in one piece, the strength of the whole can be further improved.Furthermore, even if an unexpected situation occurs where the wire mesh layers separate due to the pressure of the fluid during use, the filter It also has an effect that it can be surely prevented from falling apart.

According to the manufacturing method of the second aspect, the shape is adjusted by inserting a filter intermediate between the male mold and the female mold and crimping it, and the filter is forcibly forced by the female mold and the male mold. It is not necessary to previously form the filter intermediate into the shape of the filter because it is molded into the shape of the above. Therefore, it is sufficient to form the inner wire mesh layer into a shape such as a rectangle that is easy to fold, and as a result, there is an advantage that the manufacturing process can be further simplified and the efficiency can be improved.

Further, in the structure of claim 4, since the internal wire netting layer laminated body is wrapped with the material wire netting which becomes the upper and lower wire netting layers in the manufacturing process, the handling in the manufacturing process is facilitated and the productivity is improved. Has the effect that can.

[0011]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 8 show a first embodiment corresponding to claim 1, and a filter 1 in this embodiment includes an upper surface wire mesh layer 2 located at the uppermost layer, a lower surface wire mesh layer 6 located at the lowermost layer, and Five layers are formed by the three inner wire mesh layers 3, 4, 5 arranged between the upper and lower wire mesh layers 2, 6. Further, each of the wire nets 2 to 6 is formed in a plurality of layers by folding the material metal net.

Of these, the three wire mesh layers including the upper surface wire mesh layer 2, the second inner wire mesh layer 4 located in the middle portion, and the lower surface wire mesh layer 6 are composed of fine meshes, and the first inner wire mesh layer is formed. 3 and the third inner wire mesh layer 5 are composed of coarse wire mesh. As shown in FIG. 3, the wire mesh layers 2 to 6 are extensible and three-dimensionally woven by knitting or knitting a stainless steel or other thread 7 for knitting or knitting.

Further, as shown in FIGS. 4 and 5, the upper surface wire netting layer 2 and the lower surface wire netting layer 6 are integrally continuous. Also,
The upper and lower wire mesh layers 2 and 6 are formed into two layers by double-folding a single material wire mesh, and the inner wire mesh layers 3, 4, and 5 are wrapped by these upper and lower wire mesh layers 2 and 6. There is. Each of the internal wire mesh layers 3 to 5 is formed in a plurality of layers by folding a single material wire mesh a plurality of times.

As shown in FIG. 2 and FIG. 6, the first inner wire netting layer 3 and the second inner wire netting layer 4, and the second inner wire netting layer 4 and the third inner wire netting layer 5 which are adjacent to each other are mutually adjacent. The lines 10 in 3, 4, and 5 are overlapped so as to intersect each other at an angle of about 45 degrees in a plan view. Filter 1 is each wire mesh layer 2
6 are press-bonded so that the adjacent strips are in close contact with each other, and then sintered. Therefore, as shown in FIG.
As shown in, the striations 7 in the overlapping wire mesh layers are
Striations are joined together in a state in which they are intertwined with each other and are not separated (FIGS. 4 and 5 show the wire mesh layers in a separated state for convenience of description).

The filter 1 having the above-mentioned configuration is shown in FIG.
As shown in FIG. 2, the filter 1 is used by being loaded in a conduit 12 through which a fluid 11 such as a molten polymer flows and supporting a sand (fine particles) 13 having a filter function, or without being used together with the sand 13. Used only in. In this case, since the entire filter 1 is composed of a large number of wire mesh layers, it is possible to reliably filter minute dusts. In addition, the first inner wire mesh layer 3 and the third inner wire mesh layer 5
Is made of thick wire, and the inner wire mesh layers 3-5
Since it is wrapped with the upper and lower wire mesh layers 2 and 6 that are integrally continuous, high strength can be maintained.

Further, even if an unexpected situation occurs in which the wire mesh vertically separates due to the pressure of the fluid, since the entire upper and lower wire mesh layers 2 and 6 are integrally wrapped,
Filter 1 will not fall apart. Furthermore, since the first inner wire mesh layer 3 and the second inner wire mesh layer 3 have coarse meshes, the uptake of dusts into the filter 1 is promoted, while the second inner wire mesh layer 3 and the lower wire mesh layer have fine meshes. The presence of 6 prevents debris from coming off. Therefore, it is possible to keep the dusts in a diffused state in the entire volume of the filter 1, and as a result, it is possible to maintain a high filtering ability for a long time.

Since each of the wire netting layers 2 to 6 is knit-woven, the striations 7 of the overlapping wire netting layers are intricately entangled with each other, and as a result, the dust retaining function is further improved. can do. In addition, since the wire mesh layers 2 to 6 are formed by folding the material wire meshes, the end portions of the striations 10 are prevented or significantly reduced from being exposed to the outside of the filter 1, and the safety is improved. Can be improved.

As in the embodiment, the second and fourth wire mesh layers 3,
5 and the fourth wire mesh layer 5 are arranged so that the striations 10 thereof intersect at an angle of about 45 degrees in a plan view, the roughness of the meshes at the contact points of the wire mesh layers 3, 4, 5 is Since it can be made fine, there is an advantage that the filtration performance can be further improved. In addition, when the upper surface wire netting layer 2 is composed of fine mesh as in the embodiment, it is suitable when the sand 13 is supported by the filter 1 as shown in FIG.

Next, a second embodiment (an embodiment corresponding to claims 2 and 3) which is a method of manufacturing the filter 1 will be described with reference to FIG.
(A) and (b) -It demonstrates based on FIG. First, a material wire mesh corresponding to each wire mesh layer 2 to 6 is prepared, and FIG.
As shown in FIG. 9, after forming the internal wire mesh layers 3, 4, and 5, the inner wire mesh layers 2, 4, and 5 are stacked on top of each other as shown in FIGS. A continuous body 14 composed of the wire mesh layer 2 and the lower wire mesh layer 6 is wrapped to form a filter intermediate 1 '. The continuous body 14 of the upper and lower wire mesh layers 2 and 6 is also formed in a plurality of layers by folding the material wire mesh. This filter intermediate body 1'is formed in a rectangular shape in plan view.

Then, as shown in FIGS. 11 and 12,
The filter intermediate 1'is pushed into the female die 15 of the press machine, and then the male die 16 is fitted into the female die 15 and flatten and crushed to bring the adjacent wire mesh layers into close contact with each other and adjust the planar shape. . Then, the flattened filter intermediate 1'is put into a heating furnace (not shown) and heated and sintered to obtain the filter 1 as a finished product.

By the way, in the case of manufacturing a laminated filter made of wire mesh, as shown in FIG. 9 (c), a large number of unit wire meshes 17 are punched out from the material wire mesh, and these unit wire meshes 1
It is conceivable that 7 may be stacked and pressed together and then sintered, but in this manufacturing method, the striations 10 'at the edge of the unit wire net 17 punched from the material wire net may come out and the shape may be destroyed, or As shown in FIG. 9 (d), the unit wire nets 17 are deformed irregularly by the residual stress (curving) generated in the striations 10 'when weaving the raw metal wire nets, so that they can be accurately overlapped. There is a problem that it disappears. In addition, during the process, it is necessary to hold a large number of unit wire nets 17 by some means so that they do not come apart. Therefore, there is a problem that the manufacturing efficiency is poor due to the troublesome transfer and storage.

On the other hand, as in the present invention, if at least the inner wire mesh layers 3, 4, 5 are formed in multiple layers by folding the material wire mesh, they can be overlapped without causing the above-mentioned problems. And moreover,
The filter intermediate 1'is a continuous body 14 of upper and lower wire mesh layers 2 and 6.
Since it is in a packaged state, it can be transported and stored very easily and the manufacturing efficiency can be improved.

FIGS. 13 to 14 show a third embodiment in which the fourth aspect is embodied. In this embodiment, a filter 1 comprising upper and lower wire mesh layers 1, 8 and five inner wire mesh layers 3-7.
In the process of manufacturing, the internal wire netting layer laminates 3'to 7'corresponding to the internal wire netting layers 3 to 7 are formed so as to extend in a band shape with a width dimension wider than the diameter of the filter 1 and The wire mesh layer laminated bodies 3'to 7'are superposed on each other, and the wire mesh layer laminated bodies 3'to 7'are wrapped in an integrally continuous upper and lower wire mesh layer connecting bodies 14 ', and in this state, the whole is crimped by a press machine 18 to form a strip plate To form the intermediate laminate 19 of
The filter 1 is obtained by punching out with a press device (not shown).

Also in this case, the inner wire mesh layer laminates 3'-
Since 7'is encased in the upper and lower wire mesh layer connecting bodies 14 ', it is easy to handle in the manufacturing process and the workability can be improved. FIG. 15 shows, for example, FIGS.
In the case where the filter 1 is manufactured by the method as described in No. 4, it is the fourth embodiment in which the peripheral edge of the wire mesh layer is caulked with the rim body 20 made of a metal plate.

FIG. 16 shows the fifth embodiment. In this embodiment, the cotton-like body 21 made of fine fibers such as stainless steel is wound in multiple layers with a coarse mesh,
Two inner wire mesh layers 9a are formed on both upper and lower sides sandwiching the cotton-like body 21, and the inner wire mesh layers 9a are wound with a fine mesh connector 9b in which the upper and lower wire mesh layers are integrally joined, and then the whole press machine 1 is used.
It is pressed and solidified at 8 and then sintered. As is apparent from this embodiment, the filter 1 of the present invention may partially include a filter material that is not a wire mesh.

In the present invention, the number of wire mesh layers, the manner in which the layers are superposed, the roughness of each wire mesh layer, the material of the wire mesh, the number of wire mesh layers in the wire mesh layer, etc., are required filtering performance and It goes without saying that it can be appropriately selected depending on the strength and the like.

[Brief description of drawings]

FIG. 1 is a perspective view of a filter according to a first embodiment.

FIG. 2 is an isolated perspective view showing a superposed state of the wire mesh layers in the filter of FIG.

FIG. 3 is a diagram showing how to weave each wire mesh layer.

FIG. 4 is a schematic sectional view taken along line IV-IV in FIG.

5 is a schematic sectional view taken along line VV of FIG.

6 is a partial plan view taken along line VI-VI of FIG.

FIG. 7 is a diagram showing a state of striations in the filter.

FIG. 8 is a diagram showing a usage state of a filter.

9A and 9B are diagrams showing a method according to a second embodiment, and FIGS. 9C and 9D are diagrams for comparison with the second embodiment.

FIG. 10 is a perspective view of a filter intermediate body.

FIG. 11 is a diagram showing a pressure bonding step of the filter intermediate body.

12 is a plan sectional view taken along line XII-XII of FIG.

FIG. 13 is a diagram showing a method of a third embodiment.

FIG. 14 is a diagram showing a step subsequent to that in FIG.

FIG. 15 is a diagram showing a fourth embodiment.

FIG. 16 is a diagram showing a fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filter 1'Filter intermediate 2-9b Wire mesh layer 10 Strands 11 Fluid 12 Pipeline 13 Sand 15 Female 16 Male 3'-7 'Laminate for internal wire mesh layer 19 Intermediate laminate

Claims (4)

[Claims] 1. An upper surface wire mesh layer positioned at the uppermost layer and a lowermost layer
Plural pieces sandwiched between the bottom wire mesh layer and the upper and lower wire mesh layers.
And the inner wire mesh layer of
While being the same, at least part of the inner wire mesh layer
Is a wire mesh laminate with different mesh roughness from the upper and lower wire mesh layers
A filter, wherein at least each inner wire mesh layer among the wire mesh layers is respectively
Multiple layers can be formed by folding the wire mesh
On the other hand, the upper surface wire mesh layer and the lower surface wire mesh layer are integrally continuous.
The plurality of inner wire meshes are formed by the upper and lower wire mesh layers that are continuous in one
Envelop the layers as a whole, and in that state connect the wire mesh layers
A wire mesh laminated filter characterized in that they are held in close contact with each other . 2. A wire mesh laminated film according to claim 1.
A method of manufacturing a target, comprising preparing a plurality of material wire meshes for an inner wire mesh layer,
Multiple internal wire mesh by folding each wire mesh
After forming the layers, stack the multiple inner wire mesh layers, and
The material for the wire mesh layer
Luther intermediate body is formed, and then the filter intermediate body is fitted into a cylindrical female mold.
Then, by inserting the male mold into the female mold,
Flatly press the filter intermediate into the same shape as the male cross section.
Crushed, thus adjusting the planar shape and adjoining gold
A method for producing a laminated filter made of wire mesh, characterized in that the wire rods of the mesh are brought into close contact with each other . 3. The filter according to claim 2,
Does it crushed between body the female and the male mold, sintering in a heating furnace
A method for manufacturing a wire mesh laminated filter characterized by
Law. 4. An upper surface wire mesh layer positioned on the uppermost layer and a lowermost layer.
A plurality of layers arranged between the lower surface wire mesh layer and the upper and lower wire mesh layers.
It consists of the inner wire mesh layer and the upper and lower wire mesh layers have the same roughness.
On the other hand, at least some of the inner wire mesh layers are
A wire mesh laminated film with a different mesh roughness from the lower wire mesh layer.
A method of manufacturing a luther, in which a material wire mesh for the inner wire mesh layer is prepared and these are folded.
Due to, the internal gold of the area larger than the flat area of the filter
After forming a plurality of mesh layer laminates, these internal wire mesh layers
Which are laminated with each other and then with the laminate for the inner wire mesh layer
Is an integral element that constitutes the upper wire mesh layer and the lower wire mesh layer.
Wrapped in a wire mesh, and in that state the entire plate is flat
By crimping to the
An intermediate laminated plate is formed, and then the intermediate laminated plate is formed into a filter by a pressing device.
A method for manufacturing a wire mesh laminated filter , which comprises punching into a planar shape .