A lost foam vacuum casting device facilitating vacuum degree adjustment

Abstract

The utility model discloses a kind of lost foam vacuumizing casting devices facilitating to adjust vacuum degree, it is related to lost foam vacuumizing casting technical field, it includes base, one end base top is fixedly connected with sand box, and another end base top is fixedly connected with filter box, suction plate is all installed in sand box inside, and the top of sand box is provided with adjustable sealing cover plate, air pressure gauge is provided on the side surface of sand box, and suction plate is connected in filter box by connecting pipe, adjustable butterfly valve is provided on the outside of connecting pipe, and filter mechanism is provided in filter box, vacuum generator is installed on the side surface of filter box, the utility model optimizes filter structure, adopts the mode of manual butterfly valve cooperation air pressure gauge to adjust vacuum degree, simple structure, easy operation, to effectively improve the quality and efficiency of lost foam vacuumizing casting.

Description

Technical Field

[0001] This utility model relates to the field of lost foam vacuum casting technology, and in particular to a lost foam vacuum casting device that facilitates adjustment of vacuum level. Background Technology

[0002] Lost foam vacuum casting, as an advanced casting process, has been widely used in industrial production due to its unique advantages. Among them, the vacuum casting device, which is easy to adjust the vacuum level, plays a key role in ensuring casting quality.

[0003] A search revealed that existing patents, such as the one with publication number (CN216828594U), disclose a lost foam vacuum negative pressure casting device, which includes a base, a box, a water tank, a machine box, a filter box, a sand box, a support frame, a filtration mechanism, and a cooling mechanism. By starting a vacuum generator, air is drawn from inside the sand box along the air pipe during casting. The air pipe passes through a filter screen inside the filter box, which facilitates the filtration of liquid impurities and dry sand in the sand box gas and prevents liquid impurities and dry sand from clogging the air intake channel inside the vacuum generator. The design is reasonable, but there are still some shortcomings in the structural design.

[0004] The existing filtration mechanism consists of a fixed groove, a sliding plate, and a filter screen. This structure suffers from unstable filtration performance and makes it difficult to clean and replace the filter screen quickly and easily. Once clogged, it affects the air intake efficiency of the vacuum generator. Furthermore, the sealing design of some connection points and moving parts in the existing device is not perfect, resulting in poor sealing and air leakage, making it difficult to maintain the vacuum level. In addition, there is a lack of effective vacuum adjustment methods, making it difficult for the device to accurately control the vacuum level in the sand box according to different casting processes and casting requirements. Utility Model Content

[0005] This invention proposes a lost foam vacuum casting device that facilitates vacuum degree adjustment, solving the problems of inconvenient filter replacement, poor sealing structure reliability, and lack of vacuum degree adjustment mechanism in existing lost foam vacuum casting devices.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A lost foam casting device with adjustable vacuum level includes a base, a sand box fixedly connected to the top of one end of the base, and a filter box fixedly connected to the top of the other end of the base. Suction plates are installed inside the sand box, and an adjustable sealing cover is provided on the top of the sand box. An air pressure gauge is provided on the side of the sand box. The suction plates are connected to the filter box via connecting pipes. An adjustable butterfly valve is provided on the outside of the connecting pipes. A filtration mechanism is provided inside the filter box, and a vacuum generator is installed on the side of the filter box.

[0008] Preferably, the sand box is provided with a foam mold inside, and the foam mold is filled with a layer of casting sand on the outside.

[0009] Preferably, the air suction plate is provided with multiple sets of air suction heads, and the side of the sand box is connected to a filling tube. One end of the filling tube is fixedly connected to a pouring cup, and the other end of the filling tube is located on the side of the foam mold.

[0010] Preferably, a support frame is bolted to the top of the sand box, and the support frame has a threaded hole inside. A matching knob screw is installed inside the threaded hole, and a clamp is embedded in the bottom of the knob screw for a movable connection.

[0011] Preferably, the sealing cover is located below the clamping plate, and a rubber pad is provided on the outer bottom of the sealing cover.

[0012] Preferably, the filtration mechanism includes an inspection door, a viewing window, a mounting frame, a filter screen, and a slide rail, and two sets of mounting frames are installed inside the filter box, with the filter screen snapped into the mounting frame.

[0013] Preferably, a slide groove is provided inside one end of the filter box, and a matching maintenance door is provided inside the slide groove, with a viewing window inside the maintenance door.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This lost foam vacuum casting device, which facilitates vacuum adjustment, features a filter mechanism inside the filter box. A filter screen is snapped into the mounting frame to ensure the screen remains stable and prevents misalignment. Additionally, a matching inspection door and viewing window are located inside the slide groove on the side of the filter box. When the filter screen becomes clogged, operators can promptly detect it through the viewing window, open the inspection door, and quickly remove the filter screen for cleaning or replacement. This significantly improves maintenance efficiency, ensures unobstructed air intake for the vacuum generator, and maintains a stable vacuum level.

[0016] 2. An adjustable butterfly valve is installed on the outside of the connecting pipe. The vacuum level can be adjusted by manually operating the butterfly valve in conjunction with an air pressure gauge. Its structure is simple and easy to operate, and it can accurately control the vacuum level in the sand box. At the same time, the bottom of the sealing cover plate is equipped with a rubber gasket, which can be pressed by rotating the knob screw to further ensure the sealing during the casting process. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the exploded structure of this utility model.

[0020] Figure 4 This utility model Figure 4 Enlarged view of point A in the middle.

[0021] The following are the labels in the diagram: 1. Base; 2. Sand box; 3. Threaded hole; 4. Filter box; 5. Suction plate; 6. Air pressure gauge; 8. Connecting pipe; 9. Butterfly valve; 10. Vacuum generator; 11. Sealing cover plate; 12. Filling pipe; 13. Foam mold; 14. Casting sand layer; 15. Suction head; 16. Pour cup; 17. Support frame; 18. Knob screw; 19. Clamping plate; 20. Rubber pad; 21. Inspection door; 22. Viewing window; 23. Mounting frame; 24. Filter screen; 25. Slide groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Example 1

[0024] Reference Figures 1-4 This utility model provides a technical solution: a lost foam vacuum casting device for easy adjustment of vacuum degree, including a base 1, a sand box 2 fixedly connected to the top of one end of the base 1, and a filter box 4 fixedly connected to the top of the other end of the base 1. Suction plates 5 are installed inside the sand box 2, and an adjustable sealing cover plate 11 is provided on the top of the sand box 2. An air pressure gauge 6 is provided on the side of the sand box 2. The air pressure gauge 6 can be of type YZ-60. The suction plates 5 are connected to the filter box 4 through a connecting pipe 8. An adjustable butterfly valve 9 is provided on the outside of the connecting pipe 8. A filtering mechanism is provided inside the filter box 4. A vacuum generator 10 is installed on the side of the filter box 4 (the vacuum generator is disclosed in the existing patent CN216828594U).

[0025] Reference Figure 1 , Figure 2 The sand box 2 is equipped with a foam mold 13 inside, and the foam mold 13 is filled with a casting sand layer 14 on the outside. The suction plate 5 is equipped with multiple suction heads 15 inside, and the side of the sand box 2 is connected to a filling pipe 12. One end of the filling pipe 12 is fixedly connected to a pouring cup 16, and the other end of the filling pipe 12 is located on the side of the foam mold 13.

[0026] Reference Figure 3A support frame 17 is bolted to the top of the sand box 2, and a threaded hole 3 is provided inside the support frame 17. A matching knob screw 18 is provided inside the threaded hole 3. A clamping plate 19 is embedded in the bottom of the knob screw 18 and is movably connected. A sealing cover 11 is located below the clamping plate 19, and a rubber pad 20 is provided on the outer side of the bottom of the sealing cover 11.

[0027] In specific implementation, a lost foam vacuum casting device that facilitates vacuum degree adjustment is used. First, the foam mold 13 is placed inside the sand box 2, located inside the casting sand layer 14. Then, the sealing cover plate 11 is placed above the sand box 2. Next, the knob screw 18 is manually rotated, causing it to move up and down in the threaded hole 3 inside the support frame 17. This pushes the clamping plate 19 downwards to press the sealing cover plate 11. During the pressing process, when the clamping plate 19 contacts the surface of the sealing cover plate 11, and due to the knob... The bottom end of the lead screw 18 is embedded in the clamping plate 19 in a movable connection, thereby enabling the knob lead screw 18 to rotate further inside the clamping plate 19, while pushing the clamping plate 19 downward, thus ensuring that the sealing cover plate 11 is tightly sealed. Then, the vacuum generator 10 is started, and the vacuum generator 10 evacuates the inside of the sand box 2 through the connecting pipe 8 and the suction plate 5. Subsequently, the foam mold 13 is poured through the pouring cup 16 and the filling pipe 12. Through the above operations, the sealing of the casting process is further ensured, and the quality and stability of the casting are improved.

[0028] Example 2

[0029] Reference Figure 3 , Figure 4 This embodiment is an optimization based on the first embodiment. The filter mechanism includes an inspection door 21, a viewing window 22, a mounting frame 23, a filter screen 24, and a slide 25. Two sets of mounting frames 23 are installed inside the filter box 4. The filter screen 24 is snapped into the mounting frame 23. A slide 25 is provided inside one end of the filter box 4. A matching inspection door 21 is provided inside the slide 25. A viewing window 22 is opened inside the inspection door 21.

[0030] In practical implementation, a lost foam vacuum casting device that facilitates vacuum degree adjustment is used. When the lost foam vacuum casting device adjusts the vacuum degree, a manual butterfly valve 9 is installed on the connecting pipe 8. By rotating the handle of the butterfly valve 9, the flow area of ​​the connecting pipe 8 can be changed. When the handle is rotated clockwise, the valve disc of the butterfly valve 9 gradually closes, the flow area of ​​the connecting pipe 8 decreases, the air discharge speed in the sand box 2 slows down, and the vacuum degree decreases. Conversely, when the handle is rotated counterclockwise, the valve disc gradually opens, the flow area of ​​the connecting pipe 8 increases, the air discharge speed speed increases, and the vacuum degree increases. Since the air pressure gauge 6 is installed on the sand box 2 to display the air pressure value in the sand box 2 in real time, the operator can accurately adjust the opening degree of the manual butterfly valve 9 according to the reading of the air pressure gauge 6 and the casting process requirements. Its structure is simple and easy to operate.

[0031] In addition, when the operator observes that the filter screen 24 is clogged through the viewing window 22, the maintenance door 21 can be manually pulled out through the slide 25. Then, the filter screen 24 can be pulled out from inside the mounting frame 23 for maintenance, cleaning and replacement. After cleaning, the filter screen 24 is inserted back into the mounting frame 23 and the maintenance door 21 is closed. Through the above operations, the air intake of the vacuum generator 10 is ensured to be unobstructed, which greatly improves the maintenance efficiency.

[0032] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A lost foam vacuum casting device for easy adjustment of vacuum level, comprising a base (1), characterized in that, A sand box (2) is fixedly connected to the top of the base (1) at one end, and a filter box (4) is fixedly connected to the top of the base (1) at the other end. A suction plate (5) is installed inside the sand box (2), and an adjustable sealing cover (11) is provided on the top of the sand box (2). An air pressure gauge (6) is provided on the side of the sand box (2), and the suction plate (5) is connected to the filter box (4) through a connecting pipe (8). An adjustable butterfly valve (9) is provided on the outside of the connecting pipe (8), and a filtration mechanism is provided inside the filter box (4). A vacuum generator (10) is installed on the side of the filter box (4).

2. The lost foam vacuum casting device for easy adjustment of vacuum degree according to claim 1, characterized in that, The sand box (2) is provided with a foam mold (13) inside, and the foam mold (13) is filled with a casting sand layer (14) on the outside.

3. The lost foam vacuum casting device for easy adjustment of vacuum degree according to claim 1, characterized in that, The air suction plate (5) is provided with multiple air suction heads (15), and the sand box (2) is connected to a filling tube (12) on the side. One end of the filling tube (12) is fixedly connected to a pouring cup (16), and the other end of the filling tube (12) is located on the side of the foam mold (13).

4. The lost foam vacuum casting device for easy adjustment of vacuum degree according to claim 1, characterized in that, The sand box (2) is connected to a support frame (17) by bolts, and the support frame (17) has a threaded hole (3) inside. The threaded hole (3) has a matching knob screw (18) inside, and the bottom end of the knob screw (18) is embedded with a clamp plate (19) in a movable connection.

5. The lost foam vacuum casting device for easy adjustment of vacuum degree according to claim 4, characterized in that, The sealing cover (11) is located below the clamp (19), and a rubber pad (20) is provided on the outer side of the bottom of the sealing cover (11).

6. The lost foam vacuum casting device for easy adjustment of vacuum degree according to claim 1, characterized in that, The filtration mechanism includes an inspection door (21), a viewing window (22), a mounting frame (23), a filter screen (24), and a slide (25). The filter box (4) is equipped with two sets of mounting frames (23), and the filter screen (24) is snapped into the mounting frame (23).

7. The lost foam vacuum casting device for easy adjustment of vacuum degree according to claim 6, characterized in that, The filter box (4) at one end is provided with a slide groove (25), and a matching maintenance door (21) is provided inside the slide groove (25), and a viewing window (22) is opened inside the maintenance door (21).

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