Filtering device for preventing casting sand holes

Abstract

The utility model discloses a filtering device for preventing casting sand holes, and particularly relates to the technical field of filtering devices, which comprises a plurality of forming components for casting forming and a filtering component for preventing the casting sand holes from being blocked, the filter assembly comprises a cast plate, a filter and two filter screens, the filter is arranged on one side of the filter screens, and the filter and the two filter screens are all mounted on the front side of the cast plate. Molten metal can be filtered twice by the aid of the filter at the sprue and the filter screen between the riser and the casting body, clean molten iron can enter the casting body, scum above the molten metal can be blocked by the aid of the stepped structure when the molten metal flows to a height difference position, and the molten metal is prevented from falling off. According to the casting device, dross is effectively prevented from entering the casting body, two times of filtering are conducted, iron liquid enters the last position of the casting body in the last time of filtering, the casting device can serve as a riser neck, riser separation can be completed in subsequent cleaning, the yield of the casting body is higher, and the surface quality is better.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering devices, in particular to a filtering device for preventing sand holes in castings. Background Art

[0002] Castings are metal objects obtained by various casting methods, that is, the smelted liquid metal is poured into a pre-prepared mold by pouring, injection, suction or other casting methods, and then cooled and polished to obtain objects with certain shapes, sizes and properties. Due to the advantages of high production efficiency, stable product quality, less staff and environmental protection, it has gradually been introduced by various casting production companies.

[0003] The casting gating system is a very important part of the casting process. The quality of its design directly affects the quality, production efficiency and cost of the casting. If the impurities in the molten metal flow into the casting cavity without effective blocking and isolation, it will cause slag holes in the casting. And if the molten metal flows unsteadily in the cavity, the molten metal is likely to be drawn into the gas and brought into the casting, causing pores. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a filtering device for preventing sand holes in castings. By using the filter at the sprue and the filter screen between the riser and the casting body, the molten metal can be filtered twice to achieve the purpose of allowing clean molten iron to enter the casting body. The stepped structure blocks the scum above the molten metal when it flows to a position with a height difference, effectively preventing the scum from entering the casting body. The two filtrations, and the last filtration is the last position where the molten iron enters the casting body, and can be used as a riser neck, so that the riser separation can be completed in the subsequent cleaning, the casting body has a higher yield rate and a better surface quality, so as to solve the problems arising from the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a filtering device for preventing sand holes in castings, comprising a plurality of molding components for molding castings and a filtering component for preventing the blockage of sand holes in castings;

[0006] The filter assembly includes a casting plate, a filter and two filter screens, wherein the filter is arranged on one side of the filter screen, and the filter and the two filter screens are installed on the front side of the casting plate. By using the filter at the sprue and the filter screen between the riser and the casting body, the molten metal can be filtered twice to achieve the purpose of allowing clean molten iron to enter the casting body. The stepped structure blocks the slag above the molten metal when it flows to a position with a height difference, effectively preventing the slag from entering the casting body, thereby making the casting body have a higher yield rate.

[0007] In a preferred embodiment, each molding component includes a cross runner, a branch cross runner, a riser and two casting bodies, the cross runner is connected to the branch cross runner, the riser is connected to the branch cross runner, the riser is connected to the casting body, the cross runner, branch cross runner, riser and two casting bodies are all arranged on the casting plate; two filter screens are respectively arranged between the riser and the two casting bodies, and the molten metal can flow into the interior of the casting body through the connected cross runner, branch cross runner and riser to realize the processing and molding of the workpiece.

[0008] In a preferred embodiment, the casting plate is externally sleeved with a template, and the casting plate is installed inside the template. Through the connection between the template and the casting plate, the template can be installed together with the casting plate on a molding machine for processing.

[0009] In a preferred embodiment, a sprue is provided on the front side of the mold plate, the sprue is installed on the front side of the filter, the sprue is connected to the filter, and impurities in the molten metal being transported can be filtered through the connection between the sprue and the filter.

[0010] In a preferred embodiment, the cross section of one end of the sprue away from the filter is configured to be funnel-shaped. By configuring the cross section of one end of the sprue away from the filter to be funnel-shaped, the transportation efficiency of the molten metal can be improved.

[0011] In a preferred embodiment, the square holes on the filter screen have a size of 2×2 mm. By setting the size of the square holes on the filter screen to 2×2 mm, the filter screen can filter and block impurities in the molten metal to prevent impurities from accumulating and affecting the workpiece forming effect.

[0012] Technical effects and advantages of the utility model:

[0013] By using the filter at the sprue and the filter between the riser and the casting body, the molten metal can be filtered twice to achieve the purpose of allowing clean molten iron to enter the casting body. The stepped structure blocks the scum above the molten metal when it flows to a position with a height difference, effectively preventing the scum from entering the casting body. The two filtrations, with the last filtration being the last position where the molten iron enters the casting body, can be used as the riser neck, and the riser separation can be completed in the subsequent cleaning, resulting in a higher casting body yield and better surface quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the filter structure of the utility model;

[0016] Figure 3This is a schematic diagram of the aperture structure of the filter screen of the utility model;

[0017] Figure 4 This is a schematic diagram of the lower die structure for processing the filter screen of the utility model;

[0018] Figure 5 The utility model is a schematic diagram of the upper mold structure for processing the filter screen.

[0019] The accompanying drawings are marked as follows: 1. casting plate; 2. filter; 3. filter screen; 4. runner; 5. branch runner; 6. riser; 7. casting body; 8. mold plate; 9. sprue. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Refer to the instruction manual Figure 1-5 The utility model provides a filtering device for preventing sand holes in castings, comprising a plurality of molding components for molding castings and a filtering component for preventing the sand holes in castings from being blocked;

[0022] like Figure 1-3 As shown, the filter assembly includes a casting plate 1, a filter 2 and two filter screens 3, wherein the filter 2 is arranged on one side of the filter screen 3, and the filter 2 and the two filter screens 3 are both installed on the front side of the casting plate 1.

[0023] It is worth mentioning that, by using the filter 2 at the sprue 9 and the filter screen 3 between the riser 6 and the casting body 7, the molten metal can be filtered twice to achieve the purpose of allowing clean molten iron to enter the casting body 7. The stepped structure blocks the slag above the molten metal when it flows to a position with a height difference, effectively preventing the slag from entering the casting body 7, thereby increasing the yield of the casting body 7.

[0024] like Figure 1As shown, each molding component includes a cross runner 4, a branch cross runner 5, a riser 6 and two casting bodies 7, the cross runner 4 is connected with the branch cross runner 5, the riser 6 is connected with the branch cross runner 5, the riser 6 is connected with the casting body 7, the cross runner 4, the branch cross runner 5, the riser 6 and the two casting bodies 7 are all arranged on the casting plate 1; two filter screens 3 are respectively arranged between the riser 6 and the two casting bodies 7, and the molten metal can flow into the inside of the casting body 7 through the connected cross runner 4, the branch cross runner 5 and the riser 6 to realize the processing and molding of the workpiece, the casting plate 1 is provided with a mold plate 8 on the outside, the casting plate 1 is installed inside the mold plate 8, and through the connection between the mold plate 8 and the casting plate 1, the mold plate 8 can be installed on the molding machine together with the casting plate 1 for processing.

[0025] like Figure 1 As shown, a sprue 9 is provided on the front side of the mold plate 8, and the sprue 9 is installed on the front side of the filter 2. The sprue 9 is connected with the filter 2. Through the connection between the sprue 9 and the filter 2, impurities in the molten metal being transported can be filtered. The cross-section of one end of the sprue 9 away from the filter 2 is set to a funnel shape. By setting the cross-section of one end of the sprue 9 away from the filter 2 to a funnel shape, the transportation efficiency of the molten metal can be improved.

[0026] like Figure 2 and 3 As shown, the square holes on the filter screen 3 have a size of 2×2 mm. By setting the size of the square holes on the filter screen 3 to 2×2, the filter screen 3 can filter and block impurities in the molten metal to prevent the accumulation of impurities and affect the forming effect of the workpiece.

[0027] In the actual production process, the filter screen 3 is first processed with the help of a core making mold, and the filter screen 3 with 2×2 holes is placed in the mold, then fixed, and the mold is closed for sand shooting to complete the core making process, and then the molding process is entered. First, the assembled mold plate 8 is installed on the molding machine, and the cavity is squeezed out with wet mold sand. The various parts in the cavity are connected and connected, and the required mud core is placed. The melted molten metal is poured from the sprue 9. The molten metal first passes through the sprue 9, and then flows into the filter 2 to achieve the first filtration. Through the runner 4, due to the relationship between the cross-sectional area of ​​the runner 9 and the cross-sectional area of ​​the runner 4, the molten metal will slow down when entering the cross-sectional area of ​​the runner 4, so that the filter 2 in the previous step can carefully filter the waste slag in the molten iron; it is well known that the molten iron at the front end of the molten metal is the most likely to produce oxidized waste slag, so the front end molten metal should be drained and finally enter the filter screen 3. In this process, the water extraction will slow down, all impurities will be filtered out, and the clean molten iron will enter the casting body 7.

[0028] By designing the size of each pouring section, it is beneficial to the smooth flow of molten metal, and turbulence, air entrainment and other phenomena will not occur. First of all, the cross-sectional area of ​​each position of each pouring system must be calculated accurately to avoid pouring too fast or too slow, and control the unstable factors within the pouring system. This design is to filter out impurities in molten metal and molding sand to the maximum extent. There are many links in guiding casting production, and the influencing factors are also very large. The utility model is to amplify the adaptability of the process, not so extreme, otherwise a slight deviation in production will lead to the generation of waste products and ensure the yield of finished products.

[0029] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A filtering device for preventing sand holes in castings, characterized in that: It includes a plurality of molding components for casting molding and a filtering component for preventing the sand holes of the casting from being blocked; The filter assembly comprises a casting plate (1), a filter (2) and two filter screens (3); the filter (2) is arranged on one side of the filter screen (3); and the filter (2) and the two filter screens (3) are both installed on the front side of the casting plate (1).

2. A filtering device for preventing sand holes in castings according to claim 1, characterized in that: Each molding component comprises a runner (4), a branch runner (5), a riser (6) and two casting bodies (7); the runner (4) is connected to the branch runner (5), the riser (6) is connected to the branch runner (5), the riser (6) is connected to the casting body (7), and the runner (4), the branch runner (5), the riser (6) and the two casting bodies (7) are all arranged on the casting plate (1); The two filter screens (3) are respectively arranged between the riser (6) and the two casting bodies (7).

3. The device for filtering castings to prevent sand holes according to claim 1, characterized in that: The casting plate (1) is sleeved with a mold plate (8) on the outside, and the casting plate (1) is installed inside the mold plate (8).

4. A filtering device for preventing sand holes in castings according to claim 3, characterized in that: A sprue (9) is provided on the front side of the mold plate (8), the sprue (9) is installed on the front side of the filter (2), and the sprue (9) is connected to the filter (2).

5. A filtering device for preventing sand holes in castings according to claim 4, characterized in that: The cross section of one end of the sprue (9) away from the filter (2) is designed to be funnel-shaped.

6. The device for filtering castings to prevent sand holes according to claim 1, characterized in that: The square holes on the filter screen (3) have a specification of 2×2 mm.

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