Hollow part negative pressure exhaust pipe for sand core casting

Abstract

The utility model discloses a hollow part negative pressure exhaust pipe for sand core casting, which comprises a main body and a mounting bin arranged on the upper surface of the main body, an exhaust pump is mounted in the mounting bin, a connecting pipe is mounted on the lower surface of the exhaust pump, an electric telescopic rod is mounted on the lower surface of the main body, and an exhaust joint is mounted at one end, far away from the exhaust pump, of the connecting pipe. An air suction connector is arranged in the mounting bin, an air suction pressure plate is arranged below the air suction connector, an air guide groove is formed in the air suction pressure plate, an exhaust column is arranged on the lower surface of the air suction pressure plate, and through the main body and the air suction pump arranged in the mounting bin, air in a sand core casting hollow part can be intensively discharged and collected through a discharge pipe under the action of negative-pressure air suction; the sealing connectivity of negative pressure extraction can be guaranteed through the connecting pipe, the air extraction connector and the air extraction pressing plate, the exhaust column is used for blocking molten aluminum and preventing the molten aluminum from flowing backwards, then the exhaust efficiency of the hollow portion of the sand core is improved, and the yield of cast products is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of sand core casting technology, and in particular to a negative pressure extraction pipe for hollow parts in sand core casting. Background Technology

[0002] Sand casting refers to a casting method that produces castings in sand molds.

[0003] In the sand core casting process, effective venting of the hollow parts of the sand core plays a crucial role in ensuring casting quality. However, the traditional negative pressure venting pipe structures currently available on the market have many shortcomings in practical applications, making it difficult to meet the requirements of modern sand core casting for efficient venting, stability, and reliability. For example, using venting pins inserted into the sand core casting for venting is inefficient and may prevent the gas inside the sand core from being discharged in time, resulting in defects such as porosity and looseness in the casting. This leads to insufficient structural stability, affects the continuity of the venting effect, and ultimately impacts the venting efficiency of the hollow parts of the sand core.

[0004] Therefore, we provide a negative pressure extraction pipe for hollow sections in sand core casting. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned technical problems by providing a negative pressure extraction pipe for the hollow part of sand core casting, thereby improving the exhaust efficiency of the hollow part of the sand core.

[0006] In view of this, the present invention provides a negative pressure exhaust pipe for hollow parts in sand core casting, comprising a main body and an installation chamber disposed on the upper surface of the main body. An exhaust pump is installed inside the installation chamber, a connecting pipe is installed on the lower surface of the exhaust pump, an electric telescopic rod is installed on the lower surface of the main body, an exhaust connector is installed at the end of the connecting pipe away from the exhaust pump, an exhaust pressure plate is disposed below the exhaust connector, an air guide groove is disposed inside the exhaust pressure plate, and an exhaust column is disposed on the lower surface of the exhaust pressure plate.

[0007] Preferably, the installation chamber is fixedly installed on the upper surface of the main body, the air pump is fixedly installed inside the installation chamber, the connecting pipe is fixedly installed on the lower surface of the air pump, and the end of the connecting pipe away from the air pump passes through the installation chamber and the electric telescopic rod and extends to its outer side.

[0008] Preferably, the air extraction connector is fixedly installed at one end of the connecting pipe, an installation slide rail is installed inside the main body, a placement component is installed on the upper surface of the installation slide rail, a sand core mold is installed on the upper surface of the placement component, the air extraction pressure plate is installed on the upper surface of the sand core mold, and the exhaust column is installed on the lower surface of the air extraction pressure plate.

[0009] Preferably, the air extraction plate has an air guide groove inside, the exhaust column is fixedly installed on the lower surface of the air extraction plate, the end of the exhaust column away from the air extraction plate passes through the sand core mold and extends into its interior, and the sand core mold has a mold guide groove inside.

[0010] Preferably, a connector is installed at the end of the air guide groove away from the exhaust column, and a seal is installed on the surface of the connecting pipe. The connecting pipe drives the seal to be inserted into the interior of the connector for sealing connection through the air extraction connector. The seal is installed directly above the connector.

[0011] Preferably, the electric telescopic rod is fixedly installed on the inner upper surface of the main body, a caster wheel is installed on the lower surface of the main body, a push handle is installed on one side surface of the main body, an electrical control device is installed inside the installation compartment, the electric telescopic rod is electrically connected to the electrical control device, and a discharge pipe is installed on the upper surface of the air pump.

[0012] Preferably, the caster wheel is fixedly installed on the lower surface of the main body, the push handle is fixedly installed on one side surface of the main body, the electrical control is fixedly installed inside the installation compartment, one end of the discharge pipe is fixedly installed on the upper surface of the air pump, and the end of the discharge pipe away from the air pump passes through the installation compartment and extends to its outside.

[0013] Compared with the prior art, this utility model provides a negative pressure extraction pipe for hollow parts in sand core casting, which has the following beneficial effects:

[0014] This invention, through its main body and an air pump installed inside the installation chamber, can centrally discharge and collect the gas in the hollow part of the sand core casting under negative pressure through the discharge pipe, ensuring the effectiveness of negative pressure gas extraction from the hollow part of the casting.

[0015] This invention, through connecting pipes, air extraction connectors, and air extraction pressure plates, can ensure the sealing connection of negative pressure extraction. During the casting process, under the action of negative pressure extraction, the gas inside the mold cavity is extracted. The exhaust column inserted into the inside of the sand core casting is used to seal the aluminum liquid, prevent the aluminum liquid from flowing back, improve the exhaust efficiency of the hollow part of the sand core, and thus ensure the yield of the casting product.

[0016] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the negative pressure extraction pipe for the hollow part of sand core casting proposed in this utility model.

[0018] Figure 2 This is a front view schematic diagram of the negative pressure extraction pipe for the hollow part of sand core casting proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the connection structure between the connecting pipe and the suction plate of the negative pressure extraction pipe in the hollow part of the sand core casting proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the internal structure of the installation chamber for the hollow negative pressure extraction pipe in sand core casting proposed in this utility model.

[0021] In the diagram: 1. Main body; 2. Storage component; 3. Mounting slide rail; 4. Air pump; 5. Mold guide groove; 7. Installation chamber; 8. Electrical control; 9. Discharge pipe; 10. Sand core mold; 11. Casters; 12. Push handle; 13. Electric telescopic rod; 14. Connecting pipe; 15. Seal; 16. Air extraction pressure plate; 17. Exhaust column; 18. Air guide groove; 19. Air extraction connector; 20. Plug-in component. 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] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Example 1: A negative pressure extraction pipe for hollow sections in sand core casting, such as... Figure 1 - Figure 4As shown, the device includes a main body 1 and an installation chamber 7 disposed on the upper surface of the main body 1. An air pump 4 is installed inside the installation chamber 7. A connecting pipe 14 is installed on the lower surface of the air pump 4. An electric telescopic rod 13 is installed on the lower surface of the main body 1. An air extraction connector 19 is installed at the end of the connecting pipe 14 away from the air pump 4. An air extraction pressure plate 16 is disposed below the air extraction connector 19. An air guide groove 18 is disposed inside the air extraction pressure plate 16, and an exhaust column 17 is disposed on the lower surface of the air extraction pressure plate 16. The air pump 4 mentioned in this embodiment is a prior art feature. Therefore, no further details are provided in this embodiment. The main body 1 is located on one side of the sand core casting machine. The placement component 2 is connected to the sand core casting machine via the mounting slide rail 3. The casting after the guide mold is completed is placed inside the guide mold groove 5 opened inside the sand core mold 10. When it is necessary to exhaust the air from the hollow part of the sand core after heating the guide mold for a certain period of time, the sand core mold 10 is slid into the interior of the main body 1 under the drive of the mounting slide rail 3. After being placed directly below the electric telescopic rod 13, the electric control component 8 sends an electrical signal under the control of the control panel. The electric telescopic rod 13 is inserted into the vacuum pressure plate 16 mounted on the upper surface of the sand core mold 10. A connecting pipe 14 is installed inside the electric telescopic rod 13. The vacuum connector 19 is sealed to the insert 20 mounted on the upper surface of the vacuum pressure plate 16 via a surface-mounted sealing element 15, thus ensuring a sealed connection between the connecting pipe 14 and the air guide groove 18 inside the vacuum pressure plate 16. The exhaust column 17 penetrates the sand core mold 10 and extends into the interior of the casting for a sealed connection. The end of the exhaust column 17 away from the casting is connected to the vacuum pressure plate 16. The internally designed air guide groove 18 is sealed. When the air pump 4 is turned on, the air in the hollow part of the casting is extracted under negative pressure through the gas transmission of the connecting pipe 14. The air is collected and discharged through the discharge pipe 9 installed on the upper surface of the air pump 4. The exhaust column 17 inserted into the casting is used to seal the aluminum liquid and prevent aluminum liquid backflow. The negative pressure of the air extraction plate 16 and the air extraction connector 19 can extract the gas generated by the sand core due to heating during the casting process, improve the exhaust efficiency of the hollow part of the sand core and thus ensure the yield of the casting product.

[0025] like Figure 1 - Figure 4As shown, the installation chamber 7 is fixedly installed on the upper surface of the main body 1, the air pump 4 is fixedly installed inside the installation chamber 7, and a connecting pipe 14 is fixedly installed on the lower surface of the air pump 4. The end of the connecting pipe 14 away from the air pump 4 passes through the installation chamber 7 and the electric telescopic rod 13 and extends to its outer side. The air extraction connector 19 is fixedly installed on one end of the connecting pipe 14. An installation slide rail 3 is installed inside the main body 1. A placement component 2 is installed on the upper surface of the installation slide rail 3. A sand core mold 10 is installed on the upper surface of the placement component 2. An air extraction pressure plate 16 is installed on the upper surface of the sand core mold 10. An exhaust column 17 is installed on the lower surface of the air extraction pressure plate 16. The placement component 2 and the installation slide rail 3 can effectively ensure the position change of the sand core mold 10 and ensure the exhaust treatment of the casting during the production process. One end of the connecting pipe 14 is sealed to the air pump 4. Under the sealed connection of the air extraction connector 19, the negative pressure extraction of the hollow part of the sand core casting is completed.

[0026] like Figure 1 - Figure 4 As shown, the suction plate 16 has an air guide groove 18 inside, and the exhaust column 17 is fixedly installed on the lower surface of the suction plate 16. The end of the exhaust column 17 away from the suction plate 16 passes through the sand core mold 10 and extends into its interior. The sand core mold 10 has a mold guide groove 5 inside, and the end of the air guide groove 18 away from the exhaust column 17 is equipped with a connector 20. The surface of the connecting pipe 14 is equipped with a sealing element 15. The connecting pipe 14 drives the sealing element 15 to be inserted into the interior of the connector 20 through the suction connector 19 for sealing connection. The sealing element 15 is installed directly above the connector 20. The sealing element 15 and the connector 20 can form a sealed insertion structure to ensure the sealed delivery of negative pressure airflow. The exhaust column 17 adopts a liquid sealing structure design, which can effectively prevent the backflow of aluminum liquid during the suction process.

[0027] Example 2: Hollow section negative pressure extraction pipe for sand core casting, such as Figure 1 - Figure 4 As shown, the electric telescopic rod 13 is fixedly installed on the inner upper surface of the main body 1. The lower surface of the main body 1 is equipped with casters 11. A push handle 12 is installed on one side surface of the main body 1. An electrical control 8 is installed inside the installation compartment 7. The electric telescopic rod 13 is electrically connected to the electrical control 8. An exhaust pipe 9 is installed on the upper surface of the air pump 4. By pushing the handle 12 and changing the position of the casters 11, the portable movement of the main body 1 can be ensured, and the main body 1 can be placed in a more suitable position to exhaust the sand core casting.

[0028] like Figure 1 - Figure 4As shown, the caster wheel 11 is fixedly installed on the lower surface of the main body 1, the push handle 12 is fixedly installed on one side surface of the main body 1, the electrical control 8 is fixedly installed inside the installation chamber 7, one end of the discharge pipe 9 is fixedly installed on the upper surface of the air pump 4, and the end of the discharge pipe 9 away from the air pump 4 passes through the installation chamber 7 and extends to its outside. The airflow extracted by negative pressure can be concentrated and discharged outward through the discharge pipe 9 to ensure the gas discharge effect.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hollow section negative pressure extraction pipe for sand core casting, comprising a main body (1) and an installation chamber (7) disposed on the upper surface of the main body (1), characterized in that, An air pump (4) is installed inside the installation chamber (7). A connecting pipe (14) is installed on the lower surface of the air pump (4). An electric telescopic rod (13) is installed on the lower surface of the main body (1). An air extraction connector (19) is installed at the end of the connecting pipe (14) away from the air pump (4). An air extraction pressure plate (16) is provided below the air extraction connector (19). An air guide groove (18) is provided inside the air extraction pressure plate (16). An exhaust column (17) is provided on the lower surface of the air extraction pressure plate (16).

2. The negative pressure extraction pipe for hollow sections in sand core casting according to claim 1, characterized in that, The installation chamber (7) is fixedly installed on the upper surface of the main body (1), the air pump (4) is fixedly installed inside the installation chamber (7), and the connecting pipe (14) is fixedly installed on the lower surface of the air pump (4). The end of the connecting pipe (14) away from the air pump (4) passes through the installation chamber (7) and the electric telescopic rod (13) and extends to its outer side.

3. The negative pressure extraction pipe for hollow sections in sand core casting according to claim 1, characterized in that, The air extraction connector (19) is fixedly installed at one end of the connecting pipe (14). The body (1) is equipped with an installation slide rail (3). The upper surface of the installation slide rail (3) is equipped with a placement piece (2). The upper surface of the placement piece (2) is equipped with a sand core mold (10). The upper surface of the sand core mold (10) is equipped with the air extraction pressure plate (16). The exhaust column (17) is installed on the lower surface of the air extraction pressure plate (16).

4. The negative pressure extraction pipe for hollow sections in sand core casting according to claim 3, characterized in that, The air extraction plate (16) has an air guide groove (18) inside. The exhaust column (17) is fixedly installed on the lower surface of the air extraction plate (16). The end of the exhaust column (17) away from the air extraction plate (16) passes through the sand core mold (10) and extends into its interior. The sand core mold (10) has a mold guide groove (5) inside.

5. The negative pressure extraction pipe for hollow sections in sand core casting according to claim 1, characterized in that, A connector (20) is installed at one end of the air guide groove (18) away from the exhaust column (17). A sealing element (15) is installed on the surface of the connecting pipe (14). The connecting pipe (14) drives the sealing element (15) to be inserted into the interior of the connector (20) through the air extraction connector (19) for sealing connection. The sealing element (15) is installed directly above the connector (20).

6. The negative pressure extraction pipe for hollow sections in sand core casting according to claim 1, characterized in that, The electric telescopic rod (13) is fixedly installed on the inner upper surface of the main body (1). The lower surface of the main body (1) is equipped with casters (11). A push handle (12) is installed on one side surface of the main body (1). An electric control device (8) is installed inside the installation compartment (7). The electric telescopic rod (13) is electrically connected to the electric control device (8). A discharge pipe (9) is installed on the upper surface of the air pump (4).

7. The negative pressure extraction pipe for hollow sections in sand core casting according to claim 6, characterized in that, The universal wheel (11) is fixedly installed on the lower surface of the main body (1), the push handle (12) is fixedly installed on one side surface of the main body (1), the electrical control (8) is fixedly installed inside the installation chamber (7), one end of the discharge pipe (9) is fixedly installed on the upper surface of the air pump (4), and the end of the discharge pipe (9) away from the air pump (4) passes through the installation chamber (7) and extends to its outside.

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