KR102648738B1 - Ceramic cup - Google Patents

Abstract

The present invention relates to a ceramic cup provided between a stalk for supplying molten metal and a mold for receiving the molten metal to form a casting, and equipped with a filter unit for filtering the passing molten metal, wherein the ceramic cup is connected to the lower mold of the mold and the mold. It consists of a dual structure of an upper structure connected to the upper structure and a lower structure connected to the stalk, and a filter mounting part where the filter part is mounted on one of the upper structure and the lower structure is formed, so that the filter part can be replaced by raising the lower mold of the mold. By being equipped, it has the advantage of being able to replace the filter more easily than the conventional replacement method when replacing the filter consumed after completing low-pressure casting.

Description

Ceramic cup {Ceramic cup}

The present invention relates to a ceramic cup that filters molten metal introduced into a mold through a stalk, and allows easy replacement of a spent filter portion after the casting process is completed.

In general, low-pressure casting equipment can form wrinkle-free, dense castings, that is, beautiful castings without slag mixing, and products such as aluminum wheels are cast using low-pressure casting equipment.

Here, the low-pressure casting device is not an integrated body, but is divided into a lower mold and an upper mold. A thermal insulation furnace in which molten metal, such as aluminum, used for casting, that is, molten metal, is stored is disposed below the lower mold. The mold and the thermal insulation furnace are It is connected via Stalk.

Here, when pressure is applied to the molten metal stored in the thermal insulation furnace, the molten metal is supplied to the cavity of the mold via the stalk and the spout of the lower mold.

Meanwhile, in order to prevent oxides generated in the insulating furnace and the stalk or foreign substances in the molten metal from flowing into the cavity, a filter made of steel mesh, fiberglass, ceramic foam, etc. is installed in the spout.

In the case of the above-mentioned filter, it was used for one-time use, so the filter had to be replaced every time a product was produced from the mold. Accordingly, the low-pressure casting equipment was stopped before the next round of casting, the filter was replaced, and then the filter was replaced again. It was used as a method to proceed with casting, and a problem occurred in which production efficiency was reduced because the low-pressure casting equipment could not be operated continuously.

Meanwhile, in some sites, in order to automate the process, the filter is inserted using a drop method at every casting. This is possible in the case of a wire mesh provided to cover the upper part of the stalk, but there are cases where it is not properly seated. occurred.

In addition, when using a wire mesh, it is removed along with the material during the spout removal process. The scrap generated at this time is recovered by dissolving the components of the wire mesh together when dissolving for raw material recovery (recycling), which affects the raw material components and creates its own waste. Recycling in the phosphorus dissolution process becomes difficult.

For this reason, casting is done using fiber net, an inorganic material that is easy to process as dross when recycled, but this fiber net has a problem in that it is difficult to implement automation.

In addition, in order to promote automation, technologies are being developed to apply ceramic filters designed to be mounted on the stalk area rather than one-time filters. However, in these technologies, when filter clogging occurs, the filter is replaced by detaching the mold, or Depending on the filter installation location, the stalk may need to be separated, which affects continuous operation, which is the basis for casting quality, and causes facility outage.

Accordingly, there is an urgent need to develop technology for ceramic cups that are easy to maintain by being installed on the top of the stalk connecting the mold and the warming furnace, enable continuous casting when using an automated low-pressure casting device, and allow easy filter replacement. It was.

The present invention was designed to solve the above problems, and the purpose of the ceramic cup according to an embodiment of the present invention is to provide a ceramic cup that has a configuration that makes it easy to replace the spent filter after completing the low-pressure casting process. There is.

The ceramic cup according to an embodiment of the present invention for solving the above problems is provided between a stalk that supplies molten metal and a mold that receives the molten metal to form a casting, and is equipped with a filter unit that filters the molten metal that passes through. As, the ceramic cup is composed of a dual structure of an upper structure connected to the lower mold of the mold and a lower structure connected to the stalk, and a filter mounting portion in which a filter portion is mounted on one of the upper structure and the lower structure is formed, It may be provided so that the filter part can be replaced by raising the lower mold.

In addition, the lower structure may include a fixing part provided to have a shape corresponding to the cross section of the stalk, and a fastening part provided at the top of the fixing part and fastened to the upper structure.

Here, the outer peripheral surface of the fastening part is formed to form a gradient angle of 5° to 7°, and is provided in the shape of an upper and lower beam whose diameter widens from the upper side to the lower side. When the upper structure and the lower structure are fastened, the upper structure The fit tolerance of the substructure can be from a minimum of 0.2 mm to a maximum of 1.0 mm.

In addition, the upper structure accommodates the fastening part, and is coupled to the lower mold of the mold and a coupling part formed on the inner peripheral surface to have an inclination corresponding to the slope formed in the fastening part, and transfers the molten metal that has passed through the lower structure and the filter part to the inside of the mold. It may include a supply section that guides.

Additionally, the lower structure and the upper structure may be formed of one or more materials selected from the group consisting of alumina, silicon nitride, zirconia, and silicon carbide.

Additionally, the filter unit may be formed of a combination of one or more filters selected from the group consisting of a metal filter, a glass fiber filter, a mesh-type filter, and a porous filter.

In addition, the filter unit includes a filter housing that is formed to have a predetermined height to accommodate a plurality of filter members and is provided with a hollow structure so that the overall shape is cylindrical; It may include a filter casing that is inserted and removed from the filter housing and forms a multi-layer mounting portion to accommodate a plurality of filter members in a multi-stage manner, and a filter member that is inserted and removed from the filter casing.

Additionally, the upper structure may include a separation prevention unit that prevents the filter unit from separating by pressing an edge of the filter unit inserted into the filter mounting unit.

In addition, the filter part is provided to have a diameter and height corresponding to the filter mounting part provided in the lower structure, and is provided on a first filter part inserted into the filter mounting part and above the first filter part, and the diameter of the first filter part is It may include a second filter unit provided to have a larger diameter, and the upper structure may include a second filter unit receiving groove formed to have a diameter corresponding to the diameter of the second filter unit.

The ceramic cup according to an embodiment of the present invention can provide a more efficient work environment for producers using the low-pressure casting process by providing a filter for easy replacement of the mold after low-pressure casting.

In addition, the filter part of the ceramic cup according to the embodiment of the present invention is a filter part that can adjust the filtration rate of the molten metal input into the mold to suit the needs of the worker, and can be used at a filtration rate that suits the needs of the worker.

In addition, the ceramic cup according to an embodiment of the present invention includes a separation prevention part that presses the upper part of the filter part, and can effectively fix the filter part.

In addition, the ceramic cup according to an embodiment of the present invention has the advantage that the filter part is inserted while rotating along a guide formed in the filter mounting part, so that the operator can more easily and accurately combine the filter part when inserting it into the interior of the lower structure. have

Figure 1 is an exemplary view of a low-pressure casting device equipped with a ceramic cup according to an embodiment of the present invention.
Figure 2 is a perspective view of a ceramic cup according to an embodiment of the present invention.
Figure 3 is a partial cutaway view showing the inside of a ceramic cup according to an embodiment of the present invention.
Figure 4 is an enlarged view to show the tolerance formed between the upper structure and the lower structure, along with the draft angle formed on the inner peripheral surface of the upper structure and the outer peripheral surface of the lower structure.
Figure 5 is an exploded view of a ceramic cup according to an embodiment of the present invention.
Figure 6 is an exploded view of a filter portion formed of a housing, casing, and filter member according to an embodiment of the present invention.
Figure 7 is a partial cutaway view of a ceramic cup provided with a separation prevention portion.
Figure 8 is a front cross-sectional view of a ceramic cup provided with a filter unit consisting of a first filter unit and a second filter unit according to an embodiment of the present invention.
Figure 9 is an exemplary diagram of a ceramic cup provided with a filter insertion guide and a protrusion according to an embodiment of the present invention.
Figure 10 (a) and (b) are assembly examples of the filter part inserted into the filter insertion guide.

Hereinafter, the description of the present invention with reference to the drawings is not limited to specific embodiments, and various changes may be made and various embodiments may be possible. In addition, the content described below should be understood to include all conversions, equivalents, and substitutes included in the spirit and technical scope of the present invention.

In the following description, the terms first, second, etc. are terms used to describe various components, and their meaning is not limited, and is used only for the purpose of distinguishing one component from other components.

Like reference numerals used throughout this specification refer to like elements.

As used herein, singular expressions include plural expressions, unless the context clearly dictates otherwise. In addition, terms such as “comprise,” “provide,” or “have” used below are intended to designate the presence of features, numbers, steps, operations, components, parts, or a combination thereof described in the specification. It should be construed and understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings they have in the context of the related technology, and should not be interpreted as having ideal or excessively formal meanings, unless explicitly defined in the present application. No.

In addition, when describing with reference to the accompanying drawings, identical components will be assigned the same reference numerals regardless of the reference numerals, and overlapping descriptions thereof will be omitted. In describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

Hereinafter, the ceramic cup 1 according to an embodiment of the present invention will be described in detail based on the attached drawings 1 to 10, and specific embodiments will be looked at together.

Figure 1 is an exemplary view of a low pressure casting apparatus equipped with a ceramic cup according to an embodiment of the present invention, Figure 2 is a perspective view of a ceramic cup according to an embodiment of the present invention, and Figure 3 is a ceramic cup according to an embodiment of the present invention. It is a partial cutaway view showing the inside of the cup, and Figure 4 is an enlarged view to show the tolerance formed between the upper structure and the lower structure, along with the draft angle formed on the inner peripheral surface of the upper structure and the outer peripheral surface of the lower structure. , and Figure 5 is an exploded view of a ceramic cup according to an embodiment of the present invention.

Before describing, the low pressure casting device in which the ceramic cup 1 is used is a holding furnace (H) in which molten metal (M) is stored, and the insulating furnace (H) in which the molten metal (M) is stored. It is provided to be immersed in the furnace (H) and may include a cylindrical stalk (S) that supplies molten metal (M) to the mold (D) (metal mold, dies) located at the top, and a ceramic cup. (1) is provided at the middle of the stalk (S) and the mold (D), so that the molten metal (M) supplied through the stalk (S) can be filtered and fed into the mold (D).

The ceramic cup 1 according to an embodiment of the present invention, which will be described in detail later, is provided between a stalk (S) that supplies the molten metal (M) and a mold (D) that receives the molten metal (M) and forms a casting. , an easy-to-replace structure formed by a dual structure of the lower structure 100 and the upper structure 200, which have a built-in filter unit 300 that filters the molten metal (M) supplied from the stalk (S) to the mold (D). It concerns a ceramic cup (1).

Hereinafter, to describe the configuration of the present invention in detail with reference to FIGS. 1 to 5, the ceramic cup 1 according to an embodiment of the present invention includes a lower structure 100, an upper structure 200, and a filter unit 300. may include.

First, the lower structure 100 may be provided to contact the upper part of the stalk (S) to which the liquid molten metal (M) is supplied from the pressurized thermal insulation furnace (H).

In addition, the lower structure 100 may be provided in a cylindrical shape with an empty hollow hole in order to supply the molten metal (M) rising in contact with the stalk (S) to the mold (D).

In addition, on the upper part of the lower structure 100, there is a filter mounting part 110 formed at a depth corresponding to the thickness of the filter part 300 that filters the molten metal (M) supplied from the stalk (S) to the mold (D). It can be provided.

Here, the filter mounting portion 110 may be provided on the lower structure 100 for easy insertion and removal by the user, but this is only a preferred embodiment and may also be formed on the upper structure 200.

More specifically, the lower structure 100 may be formed through a combination of the fixing part 101 and the fastening part 102.

First, the fixing part 101 may be formed to have a cross-sectional shape corresponding to the cross-section of the stalk (S), and may be formed to have a diameter corresponding to the stalk (S), thereby allowing You can receive the supplied molten metal (M).

Additionally, the fastening portion 102 may be provided at the top of the fixing portion 101 and may be coupled to the coupling portion 201 of the upper structure 200, which will be described later.

Through this, the fastening part 102 can be formed to have a cylindrical shape on the fixing part 101.

In addition, the outer peripheral surface of the fastening portion 102 may be formed to have a predetermined inclination, and most preferably, it may be formed to have a gradient angle (A1) of 5° to 7°, so that the diameter increases from the top to the bottom. It can be formed to have the shape of a widening upper and lower beam.

Here, the material of the lower structure 100 may be formed of any one or more of alumina, silicon nitride, zirconia, and silicon carbide.

Here, alumina has excellent corrosion resistance, wear resistance, and insulation properties, and has the advantage of being cheaper than other materials, and silicon nitride is a material that is resistant to thermal shock and has excellent corrosion resistance and high temperature strength, In addition, the zirconia has a uniform and fine particle size, so it has the advantage of excellent mechanical strength, and the silicon carbide has the advantage of excellent corrosion resistance and the ability to maintain strength even at a temperature of 1,400 degrees Celsius.

In addition, the upper structure 200 may be provided with a space to accommodate the lower structure 100. For example, as shown in FIG. 4, the outer shape of the lower structure 100 is cylindrical. When formed to have a shape, the inner shape of the upper structure 200 may also be formed to have a corresponding shape.

In addition, the upper structure 200 is also connected to the lower mold of the mold (D) in order to supply the molten metal (M) rising in contact with the stalk (S) to the mold (D), and has an empty hollow hole. It may be provided in a cylindrical shape.

More specifically, the upper structure 200 may be formed through a combination of the coupling portion 201 and the supply portion 202.

First, the coupling part 201 accommodates the fastening part 102, and may be formed on its inner circumferential surface to have an inclination corresponding to the slope formed in the fastening part 102, for example, the fastening part ( When the outer peripheral surface of 102) is formed to have a draft angle (A1) of 5° to 7°, the coupling portion 201 may also be formed to have an inner peripheral surface to have a draft angle (A2) of 5° to 7°.

Through this, the upper structure 200 can be coupled in a way that it is fitted at the upper part of the lower structure 100. More specifically, for close coupling between the upper structure 200 and the lower structure 100. , the tolerances D1 and D2 formed between the outer peripheral surface of the fastening portion 102 and the inner peripheral surface of the coupling portion 201 may be formed to form a minimum gap of 0.2 mm to a maximum of 1.0 mm at the upper and lower circumferences.

Additionally, the supply unit 202 may serve as a passage that guides the molten metal (M) that has passed through the substructure 100 and the filter unit 300 into the interior of the mold (D).

At this time, the inner peripheral surface of the supply unit 202 may be formed to have a predetermined inclination, so that it may be formed in the shape of an upper-lower light whose diameter becomes wider from the upper side to the lower side.

Meanwhile, a recess may be provided in the upper part of the supply unit 202 into which a mesh net or a fiber net can be combined.

Through this, the molten metal M supplied to the supply unit 202 has the advantage of being able to be supplied to the mold D at a higher pressure due to the supply unit 202 being formed to gradually become narrower toward the top.

Here, the upper structure 200 is preferably formed of the same material as the lower structure 100, and like the lower structure 100, it includes one or more of alumina, silicon nitride, zirconia, and silicon carbide. can be formed.

Additionally, the filter unit 300 can be inserted and removed from the filter mounting unit 110 provided in the lower structure 100.

Here, the shape of the filter unit 300 may be formed so that the overall shape has a cylindrical shape with a circular flat cross-section, but this is only a shape example to aid understanding, and the cross-section is polygonal or oval-shaped. It may be formed in a shape with a predetermined thickness.

Meanwhile, when the shape of the filter unit 300 is formed to have a polygonal or oval cross section rather than a disk shape, the shape of the filter mounting unit 110 is also formed to have a shape corresponding to the shape of the filter unit 300. It could be.

Additionally, the filter unit 300 may be formed of a combination of one or more types of filters, such as metal filters, glass fiber filters, mesh-type filters, or porous filters.

1 to 5, to describe in detail the process of installing the ceramic cup 1 in the low-pressure casting apparatus according to an embodiment of the present invention, first, the lower structure 100 is installed on the top of the stalk (S) do.

Thereafter, the filter unit 300 is inserted into the filter mounting unit 100 formed in the lower structure 100.

Finally, the preparation step for the low pressure casting process is completed by positioning the lower part of the upper structure 200 to fit into the upper part of the lower structure 100 and then joining it.

Accordingly, the ceramic cup 1 according to an embodiment of the present invention, after completing the low-pressure casting process and producing the product, raises only the lower mold of the mold D to expose the lower structure 100 and the filter inserted thereto. After all parts 300 are removed from the stalk (S), the filter used for low-pressure casting can be easily installed by installing the substructure 100 of another object and the filter unit 300 on the top of the stalk (S). By being operated so that it can be replaced, it has the advantage of providing a more efficient working environment for workers using low-pressure casting equipment.

Additionally, Figure 6 is an exploded view of a filter portion formed of a housing, a casing, and a filter member according to an embodiment of the present invention.

Referring to FIG. 6, the filter unit 300 of the ceramic cup 1 according to an embodiment of the present invention may include a filter housing 310, a filter casing 320, and a filter member 330.

First, the filter housing 310 may be provided with a predetermined height to accommodate a plurality of filter members 330.

At this time, the depth of the filter mounting portion 110 described above can also be provided at a depth that can accommodate the filter housing 310 formed to have a predetermined height so as to accommodate a plurality of filter members 330. there is.

Additionally, the filter housing 310 may be provided with a hollow interior, and may be provided with an outer peripheral surface corresponding to the inner peripheral circumference of the filter mounting portion 110 formed in the lower structure 100.

Additionally, the filter casing 320 can be inserted and removed from the filter housing 310.

In addition, the filter casing 320 may be formed with a multi-layer mounting portion 321 that can accommodate a plurality of filter members 330 in a multi-stage manner.

Additionally, a handle 322 may be provided on the upper side of the filter casing 320 so that an operator using the present invention can easily remove or insert the filter casing 320 into the filter housing 310.

Additionally, the filter member 330 may be formed of one or more of the same metal filter, glass fiber filter, mesh-type filter, or porous filter as described above.

For example, when an operator wants to use a metal filter and a glass fiber filter at the same time as needed, the filter member 330 formed of a metal filter and the filter member 330 formed of a glass fiber filter are placed in the filter casing 320. ), then inserting the filter casing 320 into the filter housing 310 and coupling it to the filter mounting part 110, the filtration rate of the molten metal (M) of the conventional filter unit 300 can be adjusted to suit the working situation. It's something you can control.

Accordingly, the ceramic cup 1 according to an embodiment of the present invention can adjust the filtration rate of the filter unit 300 by inserting and removing the filter member 330 from the filter casing 320 according to the operator's request. At the same time, as the filtration rate is adjusted, the pressure of the molten metal (M) rising in the thermal insulation furnace (H) can also be easily adjusted.

Additionally, Figure 7 is a partial cutaway view of a ceramic cup provided with a separation prevention portion.

Referring to FIG. 7, the upper structure 200 according to an embodiment of the present invention has an edge of the filter unit 300 inserted into the filter mounting unit 110, and more specifically, an upper outer peripheral surface of the filter unit 300. By pressing the edge, a separation prevention portion 210 that prevents the filter portion 300 from being separated can be formed.

Here, the separation prevention part 210 is provided on the upper structure 200, as shown in FIG. 7, and has the uppermost height of the filter part 300 inserted into the lower structure 100, more specifically, It may be provided in the shape of a protrusion protruding from the middle position of the coupling portion 201 and the supply portion 202.

At this time, the separation prevention portions 210 may be arranged at regular intervals based on the cross section of the upper structure 200 having a cylindrical inner peripheral surface.

Accordingly, the ceramic cup 1 according to an embodiment of the present invention includes a separation prevention portion 210 formed to protrude from the top of the filter portion 300 even while the molten metal M is supplied to the mold D. As a result, it is possible to prevent the filter part 300 from being separated from the filter insertion part 110 of the lower structure 100 or being lifted by the pressure of the molten metal M being pushed up.

Additionally, Figure 8 is a front cross-sectional view of a ceramic cup provided with a filter unit consisting of a first filter unit and a second filter unit according to an embodiment of the present invention.

Referring to FIG. 8, the filter unit 300 according to an embodiment of the present invention may be formed through a combination of the first filter unit 301 and the second filter unit 302.

First, the first filter unit 301 may be provided to have a diameter and height corresponding to the filter mounting unit 110 provided in the lower structure 100.

Additionally, the second filter unit 302 may be provided above the first filter unit 301.

Additionally, the second filter unit 302 may be formed to have a larger diameter than the diameter of the first filter unit 301.

At this time, a second filter unit receiving groove 220 may be formed on the inner peripheral surface of the upper structure 200, more specifically, on the inner peripheral surface of the coupling portion 201.

Specifically, the second filter unit receiving groove 220 may be formed to have a diameter corresponding to the diameter of the second filter unit 302.

Through this, the ceramic cup 1 according to an embodiment of the present invention has the filter unit 300 connected to the filter insertion unit 110 of the lower structure 100 even while the molten metal M is supplied to the mold D. It is possible to more effectively prevent problems with deviations from the system.

In addition, Figure 9 is an exemplary diagram of a ceramic cup provided with a filter insertion guide and a protrusion according to an embodiment of the present invention, and Figures 10 (a) and (b) are diagrams of an example of assembly of a filter part inserted into the filter insertion guide.

9 and 10, the ceramic cup 1 according to an embodiment of the present invention may further include a filter insertion guide 111 and a protrusion 303.

First, the filter insertion guide 111 may be provided on the inner peripheral surface of the filter mounting portion 110 and may be provided in the shape of a groove that can accommodate a screw or protrusion.

Additionally, a screw- or protrusion-shaped protrusion 303 may be provided on the outer periphery of the filter unit 300 with a spacing and shape corresponding to the screw shape of the filter insertion guide 111.

That is, when the filter unit 300 is inserted into the filter mounting unit 110, the filter unit 300 inserted at the position shown in (a) of FIG. 10 is inserted into the screw-shaped groove formed in the filter insertion guide 111. It can be rotated and inserted along and combined in the form shown in (b) of Figure 10.

Accordingly, the ceramic cup 1 according to an embodiment of the present invention has a filter part 300 that is inserted while rotating along the filter insertion guide 111 formed in the filter mounting part 110, so that the operator inserts the lower structure 100. ), it has the advantage of being able to be combined more quickly when inserting the filter unit 300 into the inside, and at the same time, filter unit 300 can be accurately coupled to the filter mounting part 110 of the lower structure 100.

Although the ceramic cup 1 according to an embodiment of the present invention has been described with reference to the attached drawings 1 to 10, those skilled in the art will not change the technical idea or essential features of the present invention. You will be able to understand that it can be implemented in another specific form without doing so. Therefore, the embodiments described above are illustrative in all respects and are not restrictive.

1: Ceramic Cup
100: lower structure 101: fixing part
102: fastening part 110: filter mounting part
111: Filter insertion guide 200: Superstructure
201: coupling part 202: supply part
210: separation prevention unit 220: second filter unit receiving groove
300: filter unit 301: first filter unit
302: second filter unit 303: protrusion
310: filter housing 320: filter casing
321: Mounting portion 322: Handle
330: Filter member M: Molten metal
S: Stalk H: Insulating furnace
D: Mold

Claims (9)

In the ceramic cup, which is provided between a stoke that supplies molten metal and a mold that receives molten metal and forms a casting by low-pressure casting, and is equipped with a filter unit that filters molten metal that passes through,
The ceramic cup is,
It consists of a double structure of an upper structure that is connected to the lower mold of the mold and can be raised and lowered integrally with the lower mold of the mold, and a lower structure that is connected to the stalk and can be mutually fastened and separated. A filter is installed in one of the upper and lower structures. A portion is formed, so that the filter portion can be replaced while the upper structure and the lower structure are separated from each other by raising the lower mold of the mold,
The substructure is,
A fixing part provided with a shape corresponding to the cross section of the stalk, and
It is provided at the top of the fixing part, and includes a fastening part that is fastened to the upper structure and is formed to have a cylindrical shape,
The outer peripheral surface of the fastening part is,
It is formed to achieve a gradient angle of 5° to 7°, and is provided in the shape of an upper and lower beam with a diameter that widens from the upper side to the lower side. When the upper structure and the lower structure are joined, the fitting tolerance between the upper structure and the lower structure is Forms a gap of at least 0.2mm to maximum 1.0mm,
The superstructure is,
It is formed to have an inner shape corresponding to the fastening part so that the lower mold of the mold is lowered to fit and fasten to the lower structure to accommodate the fastening part, and is formed to have an inclination corresponding to the slope formed on the fastening part on the inner peripheral surface. joining part;
A supply section that is connected to the lower mold of the mold and guides the molten metal that has passed through the lower structure and filter section into the inside of the mold.
It includes a separation prevention unit that is arranged at regular intervals and pressurizes the edges of the filter unit inserted into the filter mounting unit to prevent the filter unit from leaving,
The filter unit,
A filter housing that is formed to have a predetermined height to accommodate a plurality of filter members and is hollow and has an overall cylindrical shape;
A filter casing provided with a handle for insertion and removal from the filter housing and forming a multi-layer mounting portion to receive a plurality of filter members in a multi-stage manner through an opening formed on the side, and
A ceramic cup comprising a filter member that is inserted and removed from the filter casing.
delete delete delete According to claim 1,
The substructure and superstructure are,
A ceramic cup comprising one or more of alumina, silicon nitride, zirconia, and silicon carbide.
According to claim 1,
The filter unit,
A ceramic cup formed by a combination of one or more of a metal filter, a glass fiber filter, a mesh filter, or a porous filter.
delete delete According to claim 1,
The filter unit,
A first filter part provided to have a diameter and height corresponding to the filter mounting part provided in the lower structure and inserted into the filter mounting part, and
A second filter unit is provided above the first filter unit and has a diameter larger than the diameter of the first filter unit,
The superstructure is,
A ceramic cup comprising a second filter receiving groove formed to have a diameter corresponding to the diameter of the second filter part.