Improved production device for lost foam casting
By setting up a spiral heat exchange air duct and an annular air corridor in the disappearing mold casting production device, the problems of time-consuming and labor-intensive drying and heat energy waste of disappearing mold casting are solved, and the rapid cooling of castings and the reuse of heat energy is achieved, reducing production costs and improving efficiency.
Patent Information
- Application Number
- CN202422163106.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-04
AI Technical Summary
The existing disappearing mold casting production equipment consumes time and wastes energy when drying the disappearing model, and the heat energy during the cooling process is not effectively utilized.
A spiral heat exchange air duct is provided on the inner wall of the sand box assembly, which uses cold air to replace the heat energy during the cooling process of the casting, and the disappearing model is dried through the ring-shaped air corridor of the air-drying box assembly to achieve the reuse of heat energy.
The rapid cooling of castings and the reuse of thermal energy are achieved, which reduces production costs and improves production efficiency.
Smart Images
Figure CN223070376U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of casting equipment, and particularly relates to a production device for improved lost foam casting. Background Art
[0002] Lost foam casting is a new type of one-time forming casting new process. Its production process mainly includes: making a lost foam pattern with a polymer material that is exactly the same as the structure and size of the casting to be cast; after the lost foam pattern is dip-coated with refractory coating and dried, it is vibrated and compacted in dry quartz sand in a sand box; the sand box is poured with molten metal under negative pressure; the molten metal causes the lost foam pattern to be gasified and discharged by heat; the lost foam pattern is replaced by liquid metal and forms a casting after cooling and solidifying. During production, most of the lost foam patterns to be dried after dip-coating with refractory coating are placed in an additional oven or drying room for drying treatment. The current drying method is time-consuming, laborious and energy-consuming, increasing additional costs. Considering that during the production process, after the molten metal is cast into a casting, it needs to be cooled and solidified, and the waste heat generated during the cooling process is discharged into the air, causing waste. If the production device for lost foam casting can be improved, and the heat energy during the cooling and solidifying process can be utilized through heat exchange to heat-dry the lost foam patterns that need to be dried, it can not only quickly cool the casting, but also reuse the heat energy in the casting process, so as to save energy, reduce production costs and improve production efficiency. In view of this, this case is generated. Summary of the Utility Model
[0003] To overcome the deficiencies in the prior art, the utility model discloses a production device for improved lost foam casting, which includes a sand box assembly, an air drying box assembly and a pouring unit. The sand box assembly is provided with a spiral heat exchange air duct on the inner wall of its box body. The lost foam pattern is placed in the middle of the inner cavity of its box body, and the gap between the lost foam pattern and the spiral air duct is filled with molding sand; the pouring unit is placed above the sand box assembly, and its lower end abuts against the lost foam pattern placed in the box body; the surrounding of the air jacket box body of the air drying box assembly is an annular air corridor, and the air corridor is communicated with the heat exchange air duct of the sand box assembly and can receive the hot air after heat exchange in the sand box assembly; a number of ventilation holes are densely arranged on the inner wall of the inner corridor of the air corridor for conveying hot air into the cavity of the air jacket box body. The utility model improves the production device for lost foam casting, uses the cold air conveyed by the heat exchange air duct to displace the heat energy during the cooling and solidifying process after the casting is poured to cool the casting, and sends the hot air after heat exchange into the annular air corridor of the air jacket box body, and hot air dries the lost foam patterns to be dried in the air jacket box body through a number of ventilation holes on the air corridor, which can not only quickly cool the casting, but also reuse the heat energy in the casting process, thereby saving energy, reducing production costs and improving production efficiency.
[0004] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:
[0005] An improved production device for lost foam casting, including a pouring unit, is characterized in that: it further includes a sand box assembly and an air drying box assembly. The sand box assembly is provided with a heat-exchangeable spiral air duct on the inner wall of its sand box. The lost foam model for lost foam casting is placed in the middle of the inner cavity of the sand box of the sand box assembly. The gap between the lost foam model and the spiral air duct is filled with molding sand. The main body of the air drying box assembly is a box-shaped cavity with an annular air corridor around it. Its annular air corridor is connected to the spiral air duct of the sand box assembly and can receive the hot air after heat exchange in the sand box of the sand box assembly. A number of small holes are densely arranged on the inner wall of the annular air corridor of the air drying box assembly, and the annular air corridor can send air into the box-shaped cavity of the air drying box assembly through these small holes.
[0006] The sand box assembly includes a box body, a box cover and a heat-exchange air duct. The box body is a box-shaped cavity with an open top. The box cover can be covered on the open mouth of the box body and can be locked and sealed. The heat-exchange air duct is a spiral heat-exchangeable ventilation duct, which is laid along the inner wall surface of the box body and is fixedly connected to the inner wall of the box body.
[0007] The pouring unit is placed above the sand box assembly, and the lower end of the pouring unit passes through the through hole provided in the box cover and abuts against the lost foam model placed in the sand box assembly.
[0008] The sand box assembly further includes an air inlet pipe and a connecting pipe. One end of the air inlet pipe is connected to one end of the heat-exchange air duct, and the other end of the air inlet pipe is connected to the air outlet end of an external fan. One end of the connecting pipe is connected to the other end of the heat-exchange air duct.
[0009] The air drying box assembly includes a wind jacket box body and a movable door. The wind jacket box body is a box-shaped cavity with an annular air corridor around it and has door openings at both ends. Movable doors that can be opened and closed are respectively provided at the two door openings at both ends. The closed cavity formed after the movable doors at both ends are closed with the wind jacket box body is an air drying chamber where the lost foam models to be dried can be placed.
[0010] An air inlet is provided on the outer wall of the annular air corridor of the wind jacket box body. The other end of the connecting pipe is connected to the air inlet of the wind jacket box body. A number of ventilation holes are densely arranged on the inner wall of the annular air corridor of the wind jacket box body.
[0011] The air drying box assembly further includes an exhaust pipe. One end of the exhaust pipe is connected to the end of the wind jacket box body and is communicated with the air drying chamber of the wind jacket box body, and the other end of the exhaust pipe is communicated with the outside.
[0012] The air drying box assembly further includes a wire rack. The wire rack is an object placement made of wire mesh plates, which is fixedly connected in the air drying chamber of the wind jacket box body. A number of lost foam models to be dried can be scattered and placed on the wire rack.
[0013] The described sand box assembly is placed above the air drying box assembly and is detachably connected to the air drying box assembly.
[0014] The described box body is provided with an air extraction port, and the air extraction port is connected to an external negative pressure fan. After the box cover is closed and locked on the box body, the box body can be evacuated by the externally connected negative pressure fan to form a negative pressure.
[0015] As can be seen from the above description, the advantages of an improved lost foam casting production device provided by the present utility model are as follows: a spiral heat exchange air duct is provided on the inner wall of the box body of the sand box assembly, and the heat exchange air duct is communicated to an annular air corridor provided in the air jacket box body of the air drying box assembly. A plurality of ventilation holes are provided on the inner layer wall of the air corridor. The heat energy during the cooling and solidification process of the casting after pouring is replaced by the cold air conveyed by the heat exchange air duct to cool the casting, and the hot air after heat exchange is sent into the annular air corridor of the air jacket box body, and the lost foam models to be dried in the air jacket box body are hot air dried through the plurality of ventilation holes on the air corridor, which can not only quickly cool the casting, but also reuse the heat energy during the casting process. By improving the lost foam casting production device, the present utility model can save energy, reduce production costs and improve production efficiency. The present utility model is reasonably designed, has a simple structure, low cost and is convenient for popularization. Brief Description of the Drawings
[0016] Figure 1 is the overall schematic diagram of an improved lost foam casting production device described in the present utility model;
[0017] Figure 2 is the enlarged schematic diagram of the sand box assembly;
[0018] Figure 3 is Figure 2 the enlarged schematic diagram of A-A in
[0019] Figure 4 is the enlarged schematic diagram of the air drying box assembly;
[0020] Figure 5 is Figure 4 the enlarged schematic diagram of B-B in
[0021] Reference Signs:
[0022] 1 Sand box assembly; 11 Box body; 12 Box cover; 13 Heat exchange air duct; 14 Air inlet duct; 15 Connecting pipe; 2 Air drying box assembly; 21 Air jacket box body; 211 Air inlet; 212 Ventilation hole; 22 Moving door; 23 Exhaust duct; 24 Grid; 3 Pouring unit; 800 Molding sand; 900 Lost foam model. Detailed Embodiments
[0023] The present utility model will be further described below through specific embodiments.
[0024] As Figure 1 shown, a production device for an improved lost foam casting according to the present utility model includes a sand box assembly 1, a drying box assembly 2, and a pouring unit 3. The sand box assembly 1 is provided with a heat-exchangeable spiral air duct on the inner wall of its sand box. The lost foam model 900 for lost foam casting is placed in the middle of the inner cavity of the sand box of the sand box assembly 1. The gap between the lost foam model 900 and the spiral air duct is filled with molding sand 800. The main body of the drying box assembly 2 is a box-shaped cavity with an annular air corridor around it. Its annular air corridor is communicated with the spiral air duct of the sand box assembly 1 and can receive the hot air after heat exchange in the sand box of the sand box assembly 1. A number of small holes are densely arranged on the inner wall of the annular air corridor of the drying box assembly 2. The annular air corridor of the drying box assembly 2 can send air into the box-shaped cavity of the drying box assembly 2 through the number of small holes. The sand box assembly 1 is placed above the drying box assembly 2 and is detachably connected to the drying box assembly 2.
[0025] As Figures 1 to 3 shown, the sand box assembly 1 according to the present utility model includes a box body 11, a box cover 12, a heat-exchange air duct 13, an air inlet pipe 14, and a connecting pipe 15. The box body 11 is a box-shaped cavity with an open top. The box cover 12 can be covered on the open mouth of the box body 11 and can be locked and sealed. The heat-exchange air duct 13 is a spiral heat-exchangeable ventilation duct, and the heat-exchange air duct 13 is laid along the inner wall surface of the box body 11 and is fixedly connected to the inner wall of the box body 11. The pouring unit 3 is placed above the sand box assembly 1. The lower end of the pouring unit 3 passes through the through hole provided in the box cover 12 and abuts against the lost foam model 900 placed in the sand box assembly 1. The pouring unit 3 is a known technology. One end of the air inlet pipe 14 is connected to one end of the heat-exchange air duct 13, and the other end of the air inlet pipe 14 is connected to the air outlet end of an external fan. One end of the connecting pipe 15 is connected to the other end of the heat-exchange air duct 13. The box body 11 is provided with an air extraction port, and the air extraction port is connected to an external negative pressure fan. After the box cover 12 is covered and locked on the box body 11, the box body 11 can be evacuated by the externally connected negative pressure fan to form a negative pressure.
[0026] As Figures 1 to 5As shown in the figure, the air-drying box assembly 2 of the present utility model includes an air jacket box body 21, a movable door 22, an exhaust duct 23 and a wire rack 24. The air jacket box body 21 is a box-shaped cavity body with a ring-shaped air corridor around the perimeter and door openings at both ends. The door openings at both ends are respectively provided with movable doors 22 that can be opened and closed. The sealed cavity formed after the movable doors 22 at both ends are closed with the air jacket box body 21 is an air-drying chamber where the expendable pattern 900 to be dried can be placed. An air inlet 211 is provided on the outer wall of the ring-shaped air corridor of the air jacket box body 21. The other end of the connecting pipe 15 is connected to the air inlet 211 of the air jacket box body 21. A number of ventilation holes 212 are densely arranged on the inner wall of the ring-shaped air corridor of the air jacket box body 21. One end of the exhaust duct 23 is connected to the end of the air jacket box body 21 and communicates with the air-drying chamber of the air jacket box body 21. The other end of the exhaust duct 23 communicates with the outside. The wire rack 24 is an object placement made of a mesh plate. The wire rack 24 is fixedly connected inside the air-drying chamber of the air jacket box body 21. A number of expendable patterns 900 to be dried can be scattered and placed on the wire rack 24.
[0027] Before the production device is used, first scatter and place a number of expendable patterns 900 to be dried on the wire rack 24 inside the air jacket box body 21, and close the movable doors 22 at both ends of the air jacket box body 21; place the dried expendable pattern 900 in the middle of the inner cavity of the box body 11 of the sand box assembly 1. The gap between the expendable pattern 900 and the heat exchange air duct 13 is filled with molding sand 800 and vibrated solid. Start the external negative pressure fan to extract air from the box body 11 to make the box body 11 form a negative pressure; use the pouring unit 3 to pour high-temperature molten metal into the box body 11 of the sand box assembly 1 to vaporize and discharge the expendable pattern 900; the expendable pattern 900 is replaced by liquid metal; then start the fan connected to the air inlet pipe 14 of the heat exchange air duct 13. The fan sends the cold air outside into the heat exchange air duct 13 to displace the heat energy during the cooling and solidification process of the casting after pouring, so as to cool down the casting, and send the hot air after heat exchange into the ring-shaped air corridor of the air jacket box body 21, and hot air-dry the expendable patterns 900 to be dried inside the air jacket box body 21 through a number of ventilation holes 212 on the air corridor.
[0028] The utility model improves the production device of lost foam casting. A spiral heat exchange air duct 13 is arranged on the inner wall of the box body 11 of the sand box assembly 1 and is communicated with an annular air corridor arranged in the air jacket box body 21 of the air drying box assembly 2. A plurality of ventilation holes 212 are arranged on the inner layer wall of the air corridor. The cold air conveyed by the heat exchange air duct 13 is used to displace the heat energy during the cooling and solidification process of the castings after casting, so as to cool down the castings. The hot air after heat exchange is sent into the annular air corridor of the air jacket box body 21, and the lost foam model 900 to be dried in the air jacket box body 21 is hot air dried through the plurality of ventilation holes 212 on the air corridor. It can not only cool the castings quickly, but also reuse the heat energy in the casting process, thereby saving energy, reducing production costs and improving production efficiency.
[0029] The above is only a specific embodiment of the utility model, but the design concept of the utility model is not limited thereto. Any non-substantive modification of the utility model using this concept shall fall within the scope of infringement of the protection scope of the utility model.
Claims
1. An improved production device for lost foam casting, comprising a pouring unit (3), characterized in that: It also includes a sand box assembly (1) and an air drying box assembly (2), wherein the sand box assembly (1) is provided with a heat exchangeable spiral air duct on the inner wall of the sand box, a lost pattern (900) for lost foam casting is placed in the middle of the sand box inner cavity of the sand box assembly (1), and the gap between the lost pattern (900) and the spiral air duct is filled with molding sand (800). The main body of the air drying box assembly (2) is a box-shaped cavity body with an annular air corridor on all sides, and the annular air corridor is connected to the spiral air duct of the sand box assembly (1). A plurality of small holes are densely arranged on the inner wall of the annular air corridor of the air drying box assembly (2), and the annular air corridor can supply air to the box-shaped cavity body of the air drying box assembly (2) through the plurality of small holes.
2. The production device of an improved lost foam casting according to claim 1, characterized in that: The sand box assembly (1) comprises a box body (11), a box cover (12) and a heat exchange air duct (13); the box body (11) is a box-shaped hollow cavity with an opening facing upward; the box cover (12) can cover the opening of the box body (11) and can be locked and sealed; the heat exchange air duct (13) is a spiral heat exchange ventilation duct; the heat exchange air duct (13) is laid along the inner wall surface of the box body (11) and is fixedly connected to the inner wall of the box body (11).
3. The production device of an improved lost foam casting according to claim 2, characterized in that: The pouring unit (3) is placed above the sand box assembly (1), and the lower end of the pouring unit (3) passes through the through hole provided in the box cover (12) and contacts the disappearing model (900) placed in the sand box assembly (1).
4. An improved production device for lost foam casting according to claim 2, characterized in that: The sand box assembly (1) also includes an air inlet pipe (14) and a connecting pipe (15), one end of the air inlet pipe (14) is connected to one end of the heat exchange air pipe (13), the other end of the air inlet pipe (14) is connected to the air outlet end of an external fan, and one end of the connecting pipe (15) is connected to the other end of the heat exchange air pipe (13).
5. An improved production device for lost foam casting according to claim 4, characterized in that: The air drying box assembly (2) comprises an air sleeve box body (21) and a movable door (22). The air sleeve box body (21) is a box-shaped cavity body with an annular air corridor on all sides and door openings at both ends. The door openings at both ends are respectively provided with movable doors (22) that can be opened and closed. The closed cavity formed by the movable doors (22) at both ends and the air sleeve box body (21) is a air drying chamber in which the disappearing model (900) to be dried can be placed.
6. An improved production device for lost foam casting according to claim 5, characterized in that: An air inlet (211) is provided on the outer wall of the annular air corridor of the air sleeve box (21), the other end of the connecting pipe (15) is connected to the air inlet (211) of the air sleeve box (21), and a plurality of ventilation holes (212) are densely arranged on the inner wall of the annular air corridor of the air sleeve box (21).
7. An improved production device for lost foam casting according to claim 6, characterized in that: The air drying box assembly (2) further comprises an exhaust duct (23), one end of which is connected to the end of the air sleeve box body (21) and communicates with the air drying chamber of the air sleeve box body (21), and the other end of which is communicated with the outside.
8. An improved production device for lost foam casting according to claim 7, characterized in that: The air drying box assembly (2) further comprises a grid frame (24), wherein the grid frame (24) is a storage piece made of a mesh plate, and the grid frame (24) is fixedly connected to the air drying chamber of the air sleeve box body (21).
9. An improved production device for lost foam casting according to claim 2, characterized in that: The described box body (11) is provided with an air extraction port, and the air extraction port is connected to a negative pressure fan outside. After the box cover (12) is covered and locked on the box body (11), the box body (11) can be evacuated by the negative pressure fan connected externally, so that the box body (11) forms a negative pressure.