Ceramic filter for casting

Abstract

The utility model relates to the technical field of casting auxiliary materials, and provides a ceramic filter for casting, which comprises a shell, a cover plate and an annular filter piece, the shell is in a volute shape; the two sides of the shell are each provided with a discharging port, one discharging port is connected with a pouring gate, and one discharging port is tightly connected with the cover plate so that the discharging ports can be sealed; a feeding hole is formed in a volute tongue part of the shell; molten metal passes through the annular filtering piece installed in the shell in a vortex mode, and an inner cavity formed by the inner wall of the annular filtering piece communicates with the discharging port. The ceramic filter is large in filtering area, excellent in residue filtering capacity and good in filtering effect, the problem that a plurality of filters need to be designed in the molten metal pouring process of a large casting is solved, and the casting quality is improved.

Description

Technical Field

[0001] This invention belongs to the field of casting, and more specifically, relates to a filter for metal casting processes. Background Technology

[0002] In metal casting processes, the housing of a ceramic filter primarily serves as a conduit connecting to the molten metal runner and fixing the filter plates. This allows the molten metal to pass smoothly through the filter plates, filtering impurities and completing the casting process. Currently, ceramic filter housings used in metal casting primarily consist of small conical housings. These housings hold a limited number of filter plates, resulting in a small filtration area, which is insufficient for castings of larger parts. Furthermore, the filter plates are subjected to vertical erosion from the molten metal, posing a risk of damage. Existing ceramic filters in metal casting processes suffer from low filtration capacity, poor filtration efficiency, and inability to achieve adequate slag removal. The excessive number of filter plates consumed not only leads to high material consumption but also necessitates multiple filters during the casting process for larger parts, further complicating the design during molding and impacting the final casting quality. Utility Model Content

[0003] Based on this, the purpose of this invention is to overcome the problems of existing casting filters having small filtration areas, which cannot meet the requirements for casting larger castings, increase the difficulty of casting modeling, have poor slag removal capacity and filtration effect, and affect the quality of castings. The invention provides a ceramic filter suitable for casting processes. This ceramic filter has a large filtration area, excellent slag removal capacity, and good filtration effect, which solves the problem of needing to design multiple filters during the pouring of molten metal for larger castings and improves the quality of castings.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A ceramic filter for casting includes a housing, a cover plate, and an annular filter element. The housing is volute-shaped. Discharge ports are respectively provided on both sides of the housing, one of which is connected to a gating system, and the other is tightly connected to the cover plate to seal the discharge port. An inlet is provided on the side wall of the housing. Molten metal flows through the annular filter element installed inside the housing in a vortex manner, and the inner cavity formed by the inner wall of the annular filter element is connected to the discharge port.

[0006] In one embodiment, the housing includes a first housing and a second housing, the first housing and the second housing being volute-shaped and having an overall symmetrical structure.

[0007] Furthermore, the first housing and the second housing are connected to each other by a snap fastener.

[0008] In one embodiment, the interior of either the first housing or the second housing is provided with a sunken annular cavity, and an annular filter placement position is provided on the annular cavity, the annular filter placement position being empty.

[0009] In one embodiment, the cross-sectional area of ​​the annular inner cavity is 1.4 to 2.0 times the cross-sectional area of ​​the feed inlet, and it is connected to the discharge outlet.

[0010] In one embodiment, the annular filter element is disposed at the annular filter element placement position and fixedly connected.

[0011] In one embodiment, the outer ring diameter of the annular filter element is smaller than the diameter of the placement position of the annular filter element.

[0012] In one embodiment, the feed inlet includes a first feed inlet and a second feed inlet, the first feed inlet being disposed on the side wall of the first housing, and the second feed inlet being symmetrically disposed on the side wall of the second housing, and the feed inlet being connected to the gating system.

[0013] In one embodiment, the filtration area of ​​the annular filter element is proportional to the amount of molten metal filtered.

[0014] The beneficial effects of this invention are as follows:

[0015] This invention provides a ceramic filter suitable for casting, used for filtering molten metal during the casting process, and is particularly suitable for metal casting processes. During the casting process, in the molding stage, a casting filter is required in the gating system to meet the filtration requirements of the molten metal. In the field of metal casting applications, existing ceramic filters are all conical filters, but the filtration capacity of a single filter is only 0.8-1.2 tons of molten metal. This invention provides a casting ceramic filter that creatively designs the filter housing as a volute shape and uses annular filter elements, increasing the filtration capacity of a single ceramic filter to 2-12 tons of molten metal. Regarding casting process design, existing conical filters typically require 8-12 sets of filters in a 10-ton molding process. This invention provides a filter housing that only requires 2 sets to meet the filtration requirements, solving the problem of needing to design multiple filters for larger castings during molten metal pouring. This significantly reduces the complexity of casting molding process design and the consumption of molding materials, simplifies casting molding design, reduces the use of casting auxiliary materials, and effectively saves on operating costs. Meanwhile, the ceramic filter for casting of this invention solves the shortcomings of low filtration efficiency, poor filtration effect, and small filtration area in the metal pouring process, improving the filtration efficiency and effect of impurities in the molten metal during casting, and significantly improving the quality of castings and reducing impurity content. This invention has a simple structure, is easy to mold, and the finished product is convenient for transportation and storage. Attached Figure Description

[0016] Figure 1 Schematic diagram of a ceramic filter for casting.

[0017] Figure 2 Schematic diagram of the first housing of a ceramic filter for casting.

[0018] Figure 3 Schematic diagram of the second housing of a ceramic filter for casting.

[0019] Figure 4 Schematic diagram of the annular filter element installed in the second housing of the cast ceramic filter.

[0020] Figure 5 Schematic diagram of a ceramic filter cover for casting.

[0021] in:

[0022] Housing-100, First Housing-101, Second Housing-102, Cover Plate-200, Inlet-300, First Inlet-301, Second Inlet-302, First Outlet-401, Second Outlet-402, Annular Filter-500, Filter Inner Cavity-501, Annular Cavity-600, Annular Filter Placement Position-700 Detailed Implementation

[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0024] This invention provides a casting filter for filtering molten metal during the casting process. The casting filter includes a housing 100, an annular filter element 500, and a cover plate 200. The housing 100 is volute-shaped. This invention creatively designs the housing in a volute shape, which allows the molten metal entering the housing to form a vortex during molten metal filtration. This increases the inflow of molten metal into the housing while preventing direct impact on the filter element, thus avoiding damage to the filter element and resulting in casting quality problems. The volute-shaped design can effectively cooperate with the annular filter element, thereby effectively increasing the filtration capacity of a single filter by up to 10 times.

[0025] Furthermore, in combination Figures 1-3 The filter housing 100 consists of a first housing 101 and a second housing 102. The first housing 101 and the second housing 102 have symmetrical overall structures, both being volute-shaped with an internal annular structure. Complementary snap-fit ​​joints are provided inside the first housing 101 and the second housing 102, which are used to assemble them together. A first outlet 401 is provided on one side of the first housing 101, and a second outlet 402 is provided on one side of the second housing 102. According to the casting process design requirements, if the second outlet 402 is connected to the sprue from which the molten metal flows out, then the first outlet 401 is sealed by a cover plate 200. A feed inlet 300 is provided at the volute tongue of the shell 100. Therefore, the feed inlet 300 is formed by combining the first feed inlet 301 located at the volute tongue position on the side wall of the first shell 101 and the second feed inlet 302 located symmetrically on the second shell 102. The feed inlet 300 connects to the gating system into which the molten metal flows. Specifically, the position of the feed inlet 300 forms the tongue of the shell, and the feed inlet is the tongue. The feed inlet 300 at the volute tongue is mainly designed to create circulation and prevent the molten metal from solidifying due to poor flow.

[0026] Furthermore, in combination Figure 4Inside the second housing 102, a sunken annular cavity 600 is provided. Inside the annular cavity 600, an annular filter placement position 700 is provided. The annular filter placement position 700 is hollow, so the annular cavity 600 is connected to the second discharge port 402. The annular filter 500 is placed in the annular filter placement position 700. Since the annular filter 500 has a hollow cavity structure, the filter cavity 501 formed inside is a space that communicates with the first discharge port 401 and the second discharge port 402. The cross-sectional area of ​​the annular inner cavity 600 can be 1.4 to 2.0 times the cross-sectional area of ​​the feed inlet. In this embodiment, the cross-sectional area of ​​the annular inner cavity 600 can be 1.7 times the cross-sectional area of ​​the feed inlet. The size of the annular filter placement position 700 can be selected and designed according to the amount of molten metal to be filtered during casting. Specifically, the filtration area of ​​the annular filter 500 is proportional to the amount of molten metal to be filtered. According to the process design, the size of the annular filter 500 is selected, and then the size of the annular filter placement position 700 is limited according to the diameter of the annular filter 500. That is, the diameter of the annular filter placement position 700 is greater than the inner ring diameter of the annular filter 500. In this way, the annular filter 500 can be fixed in the annular filter placement position 700. One side of the annular filter element 500 is fixedly and tightly connected to the annular filter element placement position 700, and the other side is tightly connected to the inner wall of the first housing 101. When the first housing 101 and the second housing 102 are combined, the annular filter element 500 is fixed in the inner cavity of the housing. The molten metal enters the housing 100 through the inlet 300 via the inflow channel. Inside the housing 100, it is filtered in the form of a vortex through the annular filter element 500 installed inside the cavity. The filtered liquid enters the inner cavity 501 of the annular filter element 500. The filtered clean molten metal enters the casting system through the inlet 402 connected to the second outlet, thus achieving the effect of filtering the molten metal during the casting process.

[0027] The ceramic filter for casting provided in this invention can filter up to 11 tons of molten metal per unit during actual production, while existing filters can only filter a maximum of 1.2 tons. It also exhibits excellent filtration performance, strong slag removal capacity, and eliminates slag inclusions in castings. Furthermore, the annular filter element can be reused multiple times.

[0028] It should be noted that, according to the process design requirements, the placement position of the annular filter element can be set in either the first shell or the second shell. Alternatively, the discharge port on the first shell or the discharge port on the second shell can be connected to the gating system, depending on the process design requirements. If one shell is connected to the gating system, the corresponding other shell is sealed by a cover plate.

[0029] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A ceramic filter for casting, characterized by, The shell, the cover plate and the annular filter; The shell is in the shape of a volute; Two sides of the shell are respectively provided with discharge ports, one of which is connected with a runner, and the other is tightly connected with the cover plate to close the discharge port; The volute tongue part of the shell is provided with an inlet port; The metal liquid enters the inlet port in the form of vortex and passes through the annular filter installed inside the shell, and the inner cavity formed by the inner wall of the annular filter is connected with the discharge port.

2. A ceramic filter for casting according to claim 1, characterized in that The shell comprises a first shell and a second shell, which are in the shape of a volute and symmetrical in overall structure.

3. A ceramic filter for casting according to claim 2, characterized in that The first shell and the second shell are connected with each other through a primary and secondary buckle.

4. A ceramic filter for casting according to claim 2, wherein The interior of any of the first shell and the second shell is provided with a sunken annular inner cavity, which is provided with an annular filter placement position, and the annular filter placement position is hollow.

5. A ceramic filter for casting according to claim 4, characterized in that The cross-sectional area of the annular inner cavity is 1.4-2.0 times of the cross-sectional area of the inlet port, and is connected with the discharge port.

6. A ceramic filter for casting according to claim 5, characterized in that The annular filter is arranged on the annular filter placement position and is fixedly connected.

7. A ceramic filter for casting according to claim 5, wherein The outer ring diameter of the annular filter is smaller than the diameter of the annular filter placement position.

8. A ceramic filter for casting according to claim 2, wherein The inlet port comprises a first inlet port and a second inlet port, the first inlet port is arranged at the volute tongue part of the first shell, and the second inlet port is symmetrically arranged at the volute tongue part of the second shell, and the inlet port is connected with the runner into the metal liquid.

9. The ceramic filter for casting according to claim 1, wherein The filtering area of the annular filter is proportional to the filtering amount of the metal liquid.

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