WO2014137005A1

WO2014137005A1 - Method for manufacturing ceramic filter and ceramic filter manufactured thereby

Info

Publication number: WO2014137005A1
Application number: PCT/KR2013/001849
Authority: WO
Inventors: 김기호
Original assignee: 주식회사 신텍
Priority date: 2013-03-07
Filing date: 2013-03-07
Publication date: 2014-09-12

Abstract

A method for manufacturing a ceramic filter comprises the steps of: supporting a slurry comprising ceramic powder on a support body having a net-shaped or a porous structure; rolling the support body around a molding bar having the shape of a cylindrical or polygonal column, wherein the molding bar is provided with a layer comprising a liquid phase-transformation substance and a shrink film on the outer circumferential surface thereof; forming a first demolding film that is a space formed by the liquid phase-transformation substance melting and dripping from the molding bar, and a second demolding film that is a space formed from shrinkage of the shrink film, when a step of drying the molding bar surrounded by the support body is carried out; and separating the support body from the molding bar by using the first demolding film and the second demolding film.

Description

Method for producing ceramic filter and ceramic filter produced thereby

The present invention relates to a method of manufacturing a ceramic filter and a ceramic filter produced thereby, and in particular, to form a layer of a liquid conversion material on the outer circumferential edge of the forming bar so as to easily separate the support body wound on the forming bar in the manufacture of the ceramic filter. A method for producing a filter and a ceramic filter produced thereby.

The ceramic filter has much better heat resistance, chemical resistance, and abrasion resistance than the polymer filter. In particular, the ceramic filter has excellent heat resistance, thereby reducing installation and maintenance costs without requiring a separate cooling device in the exhaust device.

Such a ceramic filter is provided with a method of manufacturing a ceramic filter, as in Korean Patent Registration No. 690573.

Accordingly, large ceramic filters can be easily manufactured and mass production of large ceramic filters has been attempted.

The method for producing a ceramic filter includes the steps of supporting a slurry containing ceramic powder on a support (nonwoven fabric, woven fabric, sponge, mesh, metal mesh, etc.) made of a network or porous structure, and carrying the slurry on a cylindrical ceramic filter For the production of the cylindrical or polygonal pillar-shaped structure winding step, and the carrier is wound and dried in the state of the wound and the step of sintering.

However, in order to manufacture a large-scale ceramic filter, the length and width of the forming bar and the supporting member must be enlarged, so that during the drying process of the ceramic filter, the supporting member contracts to the forming bar wound around the supporting member to separate the supporting member from the forming bar. There was a difficult problem to do.

In order to solve the above problems, the present invention is a method of manufacturing a ceramic filter for forming a layer of a liquid conversion material on the outer peripheral surface of the forming bar to facilitate separation of the carrier wound on the forming bar during the manufacture of the ceramic filter and The object is to provide a ceramic filter.

According to another aspect of the present invention, there is provided a method of manufacturing a ceramic filter, the method including: supporting a slurry including ceramic powder on a support made of a network or porous structure;

Winding the carrier 100 to a cylindrical or polygonal shaped bar (200), wherein the molded bar (200) forms a layer of liquid phase conversion material (230) on the outer circumferential surface thereof;

Forming a first demolding film formed by melting the liquid conversion material 230 from the forming bar 200 when the forming bar 200 on which the supporting member 100 is wound is dried; And

And separating the supporting member 100 from the forming bar 200 by using the first demolding film.

Method for producing a ceramic filter according to a feature of the present invention,

Forming a layer of shrink film (240) over the liquid phase conversion material (230);

When the forming bar 200 on which the carrier 100 is wound is dried, a second demolding film is formed from the forming bar 200 due to shrinkage of the first demolding film and the shrink film 240. Doing; And

And separating the carrier 100 from the forming bar 200 by using the first demolding film and the second demolding film.

Supporting a slurry including ceramic powder on a carrier 100 made of a network or porous structure;

When the forming bar 200 on which the supporting member 100 is wound is dried, a first demolding film, which is a space formed by melting and flowing the liquid conversion material 230 from the forming bar 200, is formed and the shrink film Forming a second release film that is a space due to the contraction of 240; And

By the above-described configuration, the present invention forms a layer of the liquid conversion material and the shrinkage film which turns into a liquid when the temperature is solid at room temperature and increases the temperature on the outer circumferential edge of the molding bar in the manufacture of the ceramic filter to melt the liquid conversion material from the molding bar. There is an effect that is easy to separate the carrier wound on the forming bar through the space formed by flowing out and the space due to the shrinkage of the shrink film.

According to the present invention, since the density and strength of the ceramic filter surface and the ceramic filter after sintering are varied according to the frictional degree and the relative speed of the rotating body and the roller, the physical properties of the filter are controlled through the control of such process conditions.

The present invention enables the enlargement of the cylindrical ceramic filter produced by improving the structure of the molded bar wound around the support body, and can improve the quality by improving the straightness of the cylindrical ceramic filter and easy filtration performance and handling according to the improvement of the straightness. It is effective to provide a large ceramic filter.

1 to 3 are diagrams showing a method of manufacturing a ceramic filter according to an embodiment of the present invention.

4 is a diagram illustrating an example of a rotation method applied to a method of manufacturing a ceramic filter according to a first embodiment of the present invention.

5 is a diagram illustrating an example of a rotation method applied to a method of manufacturing a ceramic filter according to a second embodiment of the present invention.

6 is a diagram illustrating an example of a rotation method applied to a method of manufacturing a ceramic filter according to a third embodiment of the present invention.

7 is a diagram illustrating an example of a rotation method applied to a method of manufacturing a ceramic filter according to a fourth embodiment of the present invention.

8 is a diagram illustrating an example of a rotation method applied to a method of manufacturing a ceramic filter according to a fifth embodiment of the present invention.

9 is a diagram showing actual equipment for FIGS. 6 and 8.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a ceramic filter, which is intended to improve the straightness of a surface of a cylinder. The slurry comprising ceramic powder is made of a network or porous structure (for example, a nonwoven fabric, a woven fabric, a porous resin, a sponge, a mesh, etc.). It is supported on the carrier.

As a method of supporting the slurry on the carrier, this can be done by dipping, applying, spraying, etc., and optionally carrying out a certain level of drying or slurry discharging (such as hooking or pulling down) before winding to the forming bar after supporting. You can also proceed.

The carrier supporting the slurry is wound on a forming bar which is a structure in the form of a cylindrical or polygonal pillar (for example, triangular, square, pentagonal, hexagonal, etc.) for the manufacture of a cylindrical ceramic filter.

In the step of winding the carrier on the molding bar, a release agent may be applied between the molding bar and the carrier, or the carrier may be wound first after winding the release paper or the release film.

This facilitates the separation of the molded bar and the carrier after the manufacturing step of the ceramic filter, so that the carrier can be separated from the molded bar without compromising the straightness secured.

After the carrier is separated from the molding bar, the drying and sintering process may be performed, but the ceramic filter may be manufactured by performing the drying and sintering process without separating the carrier from the molding bar.

In order to manufacture a large ceramic filter, the carrier shrinks toward the forming bar during drying and sintering, so that the support is not easily separated from the forming bar.

In order to overcome this problem, a method of manufacturing a ceramic filter according to an embodiment of the present invention will be described in detail with reference to FIG. 1.

Molding bar 200 according to an embodiment of the present invention is a support for applying a liquid conversion material 230 to the outer peripheral surface rim and sandwich the layer of the shrink film 240 thereon and the inside of the molding bar 200 to maintain the mold It consists of 210. Here, the liquid-phase conversion material 230 includes paraffin, wax, synthetic paraffin, paraffin according to an embodiment of the present invention has a melting point between 40-60 ℃ melting in this temperature range is any material that is converted to liquid It is also possible, and the shrink film 240 has the property of space shrinking at 60 ° C or higher.

Low melting wax has a melting point of 77 ° C. or lower, paraffin wax (48-66 ° C.), beeswax, etc. High melting point wax has a melting point of 77 ° C. or higher, synthetic wax, microcrystalline wax (65-95 ° C.) Etc.

The melting point of low melting paraffin is in the range of 30-48 ° C., and the melting point of high melting point paraffin is in the range of 50-65 ° C.

As shown in Figures 1 to 3, the forming bar 200 is configured in a variety of forms of cylindrical or polygonal pillars, forming the outer peripheral surface edges of the concave-convex portion 220 to form the forming bar 200 and the carrier 100 It has an easy structure for separation.

The uneven portion 220 forms an uneven structure to increase frictional resistance and increase surface resistance by increasing surface energy to prevent the liquid phase conversion material 230 from easily flowing out, and to apply the liquid phase conversion material 230. It is easy to do.

When the drying process is performed at a constant temperature due to the structure of the forming bar 200, a first demolding film, which is a space formed by melting and flowing the liquid conversion material 230 from the forming bar 200, is formed.

Due to the above-mentioned concave-convex portion 220, the formation of the first demolding film of the forming bar 200 may be increased.

In addition, when the forming bar 200 performs a drying process at a constant temperature, the forming bar 200 forms a second release film due to shrinkage of the shrink film 240 of the forming bar 200.

The shaping bar 200 easily separates the carrier 100 from the shaping bar 200 by using the first demolding film and the second demolding film.

The above-described liquid conversion material 230 may be made of the same melting point as the shrink film 240 or may be made of a material having a different melting point.

If the liquid phase conversion material 230 is formed of a material having a lower melting point than the shrink film 240, the liquid phase change material 230 melts and flows to form a first release film to form the carrier 100 from the forming bar 200. ).

When the carrier 100 is not separated from the forming bar 200, the temperature of the drying process is increased to form a second release film by space shrinkage of the shrink film 240, thereby forming the first release film and the second release film. The carrier 100 is separated from the bar 200.

The forming bar 200 wound around the supporting member 100 is in contact with the reference structure 300 having a surface parallel to the axis of the forming bar 200 is rolled at least one side, the forming bar 200 is stopped and the reference The structure 300 may roll with respect to the forming bar 200, the reference structure 300 may be stationary and the forming bar 200 may roll with respect to the reference structure 300, and with the forming bar 200. The reference structure 300 may roll together.

The forming bar 200 and the reference structure 300 may be provided with both rotating means (electric motor and power transmission mechanism) or selectively provided to roll.

In the rolling process, a slurry may be added to the carrier 100 and applied.

The above-described reference structure (which is a reference plane of straightness) 300 includes 1) a flat plate, 2) one roller, 3) a pair of parallel spaced rollers, and 4) a molding bar on which the carrier 100 is wound. 5) includes a hollow cylinder containing a forming bar (200) wound around the supporting member 100 is rotated by placing between a pair of parallel spaced rollers.

The method for producing a ceramic filter, such as slurry production, drying, and sintering, includes a method for manufacturing a ceramic filter of Korean Patent No. 690573, which is already known.

As shown in Figures 1 to 3, the manufacturing method of the ceramic filter according to the embodiment of the present invention is as follows.

The forming bar applies the liquid conversion material 230 to the outer circumferential edge and sandwiches a layer of the shrink film 240 thereon.

The shrinkage film 240 is inserted into the forming bar 200, and shrinkage is caused by hot air drying between 40 and 500 ° C. to form a third release film.

The molding bar 200 having the predetermined release film of the shrink film 240 formed at a predetermined interval is placed in a molding machine, and the molded article serving as the carrier 100 is wound.

The molding bar 200 on which the carrier 100 is wound is completely dried at a temperature of less than 100 ° C. in a drying chamber for a predetermined time. In this case, the liquid phase conversion material 230 maintains the converted state.

The first demolding film, which is a space formed by the shrinkage of the first release film and the shrinkage film 240, which is a space formed by melting and flowing the liquid conversion material 230 from the end of the forming bar 200 and flows to the outside, and the aforementioned third demolding. The support is easily separated from the forming bar through the membrane. Here, the completely dried carrier 100 represents a molded dried ceramic product.

As shown in FIG. 4, when the reference structure 300 is a flat plate, the forming bar 200 containing the carrier 100 rotates or the plate positioned below the forming bar 200 reciprocates, or together The forming bar 200 containing the supporting member 100 may be rolled relatively to the flat plate in a rotating manner so that the surface of the supporting member 100 may be evened by the reference structure 300.

In addition, the reference structure 300 is left as it is (not controlled), by rotating while moving the forming bar 200 to the left and right using an external device (not shown) connected to the forming bar 200 of the carrier 100 The surface can be made even and this method can be equally applied to the following FIGS. 5 to 8.

The rotation may be made while the pressure is further added to the lower portion during the rotational movement, the pressure can be applied by the weight of the carrier 100 and the forming bar 200, the carrier 100 and the forming bar ( It is also possible to proceed by lowering the pressure by rolling in a state of lifting slightly.

As shown in FIG. 5, when the reference structure 300 is one roller, the forming bar 200 containing the carrier 100 ++ rotates or the rollers contacting the forming bar 200 rotate or they are By rotating together, the cylindrical structure containing the supporting member 100 may be rotated relative to the roller so that the supporting member 100 and the circumferential surface may be evened by the roller reference structure 300.

During the rotational movement, the cylindrical structure containing the carrier 100 may be pressed while applying pressure to be pressed onto the roller side so that the rotation may be performed.

As shown in FIG. 6, when the reference structure 300 is a pair of parallel spaced rollers, the forming bar (cylindrical structure) 200 containing the carrier 100 rotates or the forming bar 200. The cylindrical structure containing the carrier 100 rotates relative to the roller by rotating the rollers in contact with the rollers or by rotating them together so that the circumferential surface of the carrier 100 is evenly distributed by the roller reference structure 300. You can do that.

During rotational movement, the cylindrical structure containing the carrier 100 may be pressed while being pressed to the roller side, and the rotation may be performed, and may be pressed by the weight of the cylindrical structure containing the carrier 100.

As shown in FIG. 7, when the reference structure 300 is a cylinder containing the forming bar (cylindrical structure) 200, the forming bar 200 containing the supporting member 100 rotates or forms the forming bar 200. The cylindrical structure containing the carrier 100 rotates relative to the cylinder by rotating the cylinder in contact with or rotating the cylinder together so that the circumferential surface of the carrier 100 is formed on the inner surface of the cylindrical reference structure 300. Can be made even.

FIG. 8 is a view showing an example of a rotation method applied to a method of manufacturing a ceramic filter according to a fifth embodiment of the present invention, and FIG. 9 is a view showing actual equipment for FIGS. 6 and 8.

6 and 7, when the reference structure 300 is a hollow cylinder containing a forming bar 200 wound on a rotating support member 100 mounted between a pair of parallel spaced rollers, Combining the schemes of FIGS. 6 and 8, its driving is similar to the schemes of FIGS. 6 and 7 described above.

Since the surface and the density and strength of the ceramic filter after sintering vary according to the frictional degree and the relative speed of the forming bar 200 wound around the reference structure 300 and the carrier 100 described above, The control adjusts the physical properties of the ceramic filter.

In this rotation step, the slurry supported on the carrier 100 may be dried to a certain degree during the rotational movement, and optionally, an additional drying process may be added as necessary.

The drying and sintering process of the carrier 100 may be performed in a state in which the carrier 100 is not separated from the molding bar 200, and may be performed after separating the carrier 100 from the molding bar 200.

A process of processing the carrier 100 separated from the forming bar 200 into a shape necessary for manufacturing a ceramic filter as a final product is performed.

The upper or lower portion of the carrier 100 is cut to form a top or bottom portion in a planar shape.

It comprises a hollow cylinder or hollow polygonal column portion made of a sintered body of ceramic powder produced by the method for producing a ceramic filter.

The embodiments of the present invention described above are not implemented only by the apparatus and / or method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiments of the present invention, a recording medium on which the program is recorded, and the like. Such implementations may be readily implemented by those skilled in the art from the description of the above-described embodiments.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims

Supporting the slurry including the ceramic powder on a support made of a network or porous structure;

Winding the carrier 100 to a cylindrical or polygonal shaped bar (200), wherein the molded bar (200) forms a layer of liquid phase conversion material (230) on the outer circumferential surface thereof;

Forming a first demolding film formed by melting the liquid conversion material 230 from the forming bar 200 when the forming bar 200 on which the supporting member 100 is wound is dried; And

Separating the carrier 100 from the forming bar 200 by using the first demolding film.

Method for producing a ceramic filter comprising a.
The method of claim 1,

Forming a layer of shrink film (240) over the liquid phase conversion material (230);

When the forming bar 200 on which the carrier 100 is wound is dried, a second demolding film is formed from the forming bar 200 due to shrinkage of the first demolding film and the shrink film 240. Doing; And

Separating the support member 100 from the forming bar 200 by using the first demolding film and the second demolding film

Method of manufacturing a ceramic filter further comprising.
Supporting a slurry including ceramic powder on a carrier 100 made of a network or porous structure;

Winding the carrier 100 to a cylindrical or polygonal shaped bar (200), wherein the molded bar (200) forms a layer of liquid phase conversion material (230) on the outer circumferential surface thereof;

Forming a layer of shrink film (240) over the liquid phase conversion material (230);

When the forming bar 200 on which the supporting member 100 is wound is dried, a first demolding film, which is a space formed by melting and flowing the liquid conversion material 230 from the forming bar 200, is formed and the shrink film Forming a second release film that is a space due to the contraction of 240; And

Separating the support member 100 from the forming bar 200 by using the first demolding film and the second demolding film.

Method for producing a ceramic filter comprising a.
The method according to claim 2 or 3,

Forming the first demolding film by melting the liquid phase change material 230 by melting the liquid phase change material 230 into a material having a lower melting point than the shrinkage film 240; And

When the carrier 100 is not separated from the forming bar 200, increasing the temperature of a drying process to form the second release film by space shrinkage of the shrink film 240.

Method of manufacturing a ceramic filter further comprising.
The method according to claim 2 or 3,

The method of manufacturing a ceramic filter in which the liquid phase conversion material 230 is composed of a material having the same melting point or a different melting point.
The method according to any one of claims 1 to 3,

The outer circumferential edge of the forming bar 200 has a concave-convex portion 220, characterized in that the manufacturing method of the ceramic filter.
The method according to any one of claims 1 to 3,

At least one side of the forming bar 200 wound around the supporting member 100 is in contact with the reference structure 300 having a surface parallel to the forming bar 200.

Method of producing a ceramic filter, characterized in that it further comprises.
The method according to any one of claims 1 to 3,

The forming bar 200 wound around the supporting member 100 is in contact with the reference structure 300 having a surface parallel to the forming bar 200, and does not control the reference structure 300. Rotating the forming bar 200 to the left and right by using an external device connected to the

Method of producing a ceramic filter, characterized in that it further comprises.
A ceramic filter comprising a hollow cylinder or hollow polygonal column portion made of a sintered body of ceramic powder produced by the method for producing a ceramic filter according to any one of claims 1 to 3.