Gas frame for evanescent mode mold

Abstract

The invention relates to an air frame for an evanescent mode mold, and relates to the technical field of molds, the air frame comprises a frame body, a first adjusting assembly and a second adjusting assembly, the interior of the frame body is hollow, and an air inlet hole and an exhaust hole are formed in the two ends of the frame body respectively; a plurality of groups of first adjusting assemblies are arranged, the plurality of groups of first adjusting assemblies are arranged in the circumferential direction of the frame body, and the first adjusting assemblies are arranged in the frame body and are used for reducing the flow of steam flow; and the multiple sets of second adjusting assemblies are arranged, the multiple sets of first adjusting assemblies correspond to the multiple sets of second adjusting assemblies in a one-to-one mode, and the second adjusting assemblies are arranged on the first adjusting assemblies and used for increasing the flow of steam flow. The device has the effect of reducing steam loss.

Description

Technical Field

[0001] The present application relates to the technical field of molds, and in particular to an air frame for a lost foam mold. Background Art

[0002] The lost foam method is a casting method in which a full-scale mold with the same structure and size as the part is made of foam plastic. The mold is dipped in refractory adhesive coating, dried, and then dry sand molded. It is vibrated and compacted, and then molten metal is poured in to make the pattern vaporize and disappear due to heat, thereby obtaining a metal part with the same shape as the pattern.

[0003] At present, the general mold is moved toward the lower mold by the upper mold pushing the middle air frame, so that the clamping plate clamps the first push plate and the second push plate on the middle air frame to prevent the first push plate and the second push plate from retreating or the mold from leaking, thereby improving the molding accuracy.

[0004] However, in actual production, there are large frames for making small molds, which causes steam waste and leads to low productivity. Summary of the invention

[0005] In order to reduce the loss of steam, the present application provides an air frame for a lost foam mold.

[0006] The present application provides an air frame for a lost foam mold, which adopts the following technical solution: An air frame for a lost foam mold, comprising: A frame body, wherein the interior of the frame body is hollow and an air inlet hole and an air outlet hole are respectively opened at two ends; A first regulating component, wherein the first regulating component is provided in a plurality of groups, and the plurality of groups of the first regulating components are arranged around the circumference of the frame, and the first regulating component is provided in the frame and is used to reduce the flow rate of the steam airflow; The second regulating component is provided with multiple groups, the multiple groups of the first regulating components correspond one to one with the multiple groups of the second regulating components, the second regulating component is arranged on the first regulating component, and is used to increase the flow rate of the steam airflow.

[0007] By adopting the above technical solution, steam enters the frame through the air inlet. When casting a small mold, the first regulating component reduces the flow rate of the steam airflow, and when casting a large mold, the second regulating component increases the flow rate of the steam airflow. Through the cooperation of the first regulating component and the second regulating component, the flow rate of the steam airflow can be flexibly adjusted and controlled, and the production efficiency is improved and the energy consumption is reduced by accurately controlling the steam flow rate.

[0008] Optionally, a universal tube is provided in the frame, the axis of the universal tube is arranged to be the same as the axis of the frame, a hollow structure is formed between the inner wall of the frame and the universal tube, and the hollow structure is filled with thermal insulation material, and air inlet holes and exhaust holes are also provided at positions corresponding to the frame.

[0009] By adopting the above technical solution, during the steam circulation process, by providing the heat insulation material, the heat loss can be reduced, thereby maintaining the temperature of the steam inside the frame stable, thereby improving the production efficiency.

[0010] Optionally, the first adjustment component includes: A drainage tube, the drainage tube is located in the frame and is fixedly connected to the universal tube, and the drainage tube and the universal tube are in a "cross" shape; A regulating part, which is disposed in the drainage pipe and is used to reduce the flow rate of the steam airflow; The collecting part is arranged in the drainage pipe and is used for condensing and collecting excess steam.

[0011] By adopting the above technical solution, steam enters the universal tube through the air inlet. When casting a small mold, the regulating part reduces the flow rate of the steam airflow in the universal tube and forces the excess steam into the drainage tube. The collecting part condenses the excess steam and collects and recovers the condensed steam, thereby improving the accuracy of steam flow control and further improving energy utilization efficiency.

[0012] Optionally, the adjustment unit includes: A slide plate, wherein two slide plates are provided, and the two slide plates are symmetrically arranged along the axis direction of the universal tube, and the slide plates are slidably connected in the drainage tube, and the sliding direction is the axis direction of the drainage tube; A first baffle, wherein two first baffles are provided, and the two first baffles are symmetrically arranged along the axis direction of the universal tube, and the first baffles are fixedly connected to the slide plate; A second baffle, wherein two second baffles are provided, and the two second baffles are symmetrically arranged along the axis direction of the universal tube, and the second baffle is fixedly connected to the inner wall of the drainage tube and is located on a side of the slide plate close to the first baffle; A spring, wherein two springs are provided, and the two springs correspond to the two first baffles one by one, and the spring is located between the first baffle and the second baffle, and two ends of the spring are respectively fixedly connected to the first baffle and the second baffle; In the initial state, the spring is in a stretched state, at which time the two sliding plates are pressed against each other at the sides close to each other.

[0013] By adopting the above technical solution, when the steam flows into the universal pipe, the steam squeezes the abutment position of the slide plate, and the steam applies thrust to the side of the slide plate. Under the action of the thrust, the slide plate drives the first baffle plate to move, and the first baffle plate cooperates with the second baffle plate to squeeze the spring, which deforms. Under the action of the spring elastic force, a gap is opened between the two slide plates, allowing a small amount of steam to pass through, thereby facilitating the precise control and dynamic adjustment of the steam airflow flow rate, thereby improving production efficiency and product quality.

[0014] Optionally, the collection unit includes: a limiting plate, the limiting plate being arranged on one end of the drainage tube; A condenser pipe, the condenser pipe is fixedly connected to an end of the drainage pipe away from the limiting plate; The collecting box is fixedly connected to the outer side of the frame and communicated with the end of the condensing tube away from the limiting plate.

[0015] By adopting the above technical solution, when the steam flows into the universal pipe, under the restricting effect of the two slides, a large amount of steam flows along the slides to the two ends of the drainage pipe. Under the action of the restriction plate, the restriction plate guides the steam to flow toward one end of the condenser. The steam enters the condenser. Since the steam is cooled in the condenser, the temperature is reduced and the steam condenses into liquid water. The liquid water flows into the collection box, thereby improving the energy utilization efficiency and reducing the production cost.

[0016] Optionally, one side where the two slide plates abut against each other is tilted toward the axis direction of the universal tube in a direction in which the two slide plates approach each other.

[0017] By adopting the above technical solution, the inclined design of the slide plate can guide the steam to flow along the axial direction of the universal pipe. Under the guiding effect, it helps to ensure that the steam can be concentrated and efficiently squeezed to the slide plate abutment position, thereby easily reducing energy loss and unnecessary pressure drop.

[0018] Optionally, the second adjustment component includes: A connecting rod, the connecting rod is sequentially passed through the frame and the drainage pipe, and is located on a side of the limiting plate away from the condensing pipe; A driving part, which is disposed on the connecting rod and is used to drive the moving part to move; The moving part is arranged on the driving part and is used for driving the limiting plate to move.

[0019] By adopting the above technical solution, when casting a large mold, the connecting rod is rotated, the connecting rod transmits power to the driving part, and the driving part drives the moving part to drive the limiting plate to move. By reducing the volume inside the drainage pipe, the flow rate per unit volume increases while the steam flow rate remains unchanged, the thrust applied by the steam on the slide plate increases, the gap between the two slide plates increases, and the steam flow rate increases, thereby enabling flexible adjustment, thereby easily reducing steam losses.

[0020] Optionally, the driving unit includes: A bevel gear 1, the bevel gear is coaxially fixed to one end of the connecting rod and is located in the drainage tube; Bevel gear 2, the bevel gear 2 is meshed with the bevel gear 1 and is rotatably connected to the drainage tube; A threaded sleeve is coaxially fixed to the second bevel gear and is located on a side of the second bevel gear close to the condenser.

[0021] By adopting the above technical solution, the connecting rod is rotated, the connecting rod drives bevel gear 1 to rotate, bevel gear 1 drives bevel gear 2 to rotate, bevel gear 2 drives the threaded sleeve to rotate, and the threaded sleeve converts rotational motion into linear motion, so that the moving part can easily drive the limiting plate to move, thereby easily improving efficiency.

[0022] Optionally, the moving part includes: A threaded rod, wherein the threaded rod is threadedly connected to the threaded sleeve, and one end of the threaded rod away from the threaded sleeve is fixedly connected to the limiting plate; A guide rod, wherein the axial direction of the guide rod is arranged parallel to the axial direction of the threaded rod, one end of the guide rod is penetrated through the limiting plate, and the other end is fixedly connected to the drainage tube.

[0023] By adopting the above technical solution, bevel gear 2 drives the threaded sleeve to rotate, and the threaded sleeve drives the threaded rod to rotate. Under the action of the guide rod, the threaded rod drives the limiting plate to move. When the limiting plate moves, the cross-sectional area inside the drainage pipe is changed, so that it is easy to dynamically adjust the steam flow inside the drainage pipe, and then it is easy to reduce the loss of steam.

[0024] Optionally, a screw cap is fixedly provided on one end of the connecting rod located outside the frame.

[0025] By adopting the above technical solution, the screw cap provides additional grip and fixing area, thereby facilitating adjustment of the position of the limiting plate, thereby improving operational convenience.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting up the drainage pipe, the regulating part and the collecting part, the accuracy of steam flow control is improved, thereby improving the energy utilization efficiency; 2. By setting the connecting rod, driving part and moving part, flexible adjustment can be achieved, thereby easily reducing the loss of steam; 3. By setting a screw cap, it is easy to adjust the position of the limiting plate, thereby improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 is a cross-sectional view of the first adjustment component in the embodiment of the present application; Figure 3 yes Figure 2 Magnified view at A in the middle; Figure 4 is a cross-sectional view of the second adjustment component in the embodiment of the present application; Figure 5 yes Figure 4 Magnified view at B.

[0028] Description of reference numerals: 1. Frame; 11. Air inlet; 12. Air outlet; 13. Universal pipe; 2. First adjusting component; 21. Drainage pipe; 22. Adjusting part; 221. Slide plate; 222. First baffle plate; 223. Second baffle plate; 224. Spring; 23. Collecting part; 231. Limiting plate; 232. Condenser; 233. Collecting box; 2331. Water outlet pipe; 2332. Water stop valve; 3. Second adjusting component; 31. Connecting rod; 311. Screw cap; 32. Driving part; 321. Bevel gear one; 322. Bevel gear two; 323. Threaded sleeve; 33. Moving part; 331. Threaded rod; 332. Guide rod. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 This application is described in further detail.

[0030] The present application embodiment discloses an air frame for a lost foam mold. Figure 1 and Figure 2 An air frame for a lost foam mold includes a frame body 1, a first adjusting component 2 and a second adjusting component 3. The frame body 1 is hollow inside, and an air inlet 11 and an exhaust hole 12 are respectively opened at both ends; the first adjusting component 2 is arranged in the frame body 1, and is used to reduce the flow rate of the steam airflow; the second adjusting component 3 is arranged on the first adjusting component 2, and is used to increase the flow rate of the steam airflow.

[0031] When in use, steam is passed into the air inlet 11 and enters the frame 1 through the air inlet 11. When casting a small mold, the first regulating component 2 reduces the flow rate of the steam airflow; When casting a large mold, the second regulating component 3 increases the flow rate of the steam airflow, and reduces the loss of steam by flexibly regulating and controlling the flow rate of the steam airflow, thereby improving production efficiency and further reducing energy consumption.

[0032] Reference Figure 1 and Figure 2 The frame 1 is in a rectangular frame shape and is arranged horizontally. The frame 1 is hollow inside and is provided with a universal tube 13 inside. The universal tube 13 is in a circular tube shape. The two ends of the universal tube 13 are connected end to end. The axis of the universal tube 13 is arranged in the same way as the axis of the frame 1.

[0033] A hollow structure is formed between the inner wall of the frame 1 and the universal tube 13, and the hollow structure is filled with a heat-insulating material. In this embodiment, the heat-insulating material is preferably a polystyrene material.

[0034] The frame 1 and the universal tube 13 are both provided with an air inlet 11 and an air outlet 12, which are connected via a connecting tube. The air inlet 11 and the air outlet 12 are respectively located at both ends of the length direction of the frame 1, and are both located at the center.

[0035] Reference Figure 1 and Figure 2 There are two groups of first adjustment components 2, which are respectively arranged on both sides of the width direction of the frame 1 and symmetrically arranged. The first adjustment component 2 is located at one end of the frame 1 in the length direction close to the air inlet 11.

[0036] The first adjustment component 2 includes a drainage tube 21, an adjustment portion 22 and a collection portion 23. The drainage tube 21 is located in the frame 1 and is fixedly connected to the universal tube 13. The drainage tube 21 is horizontally arranged with both ends being closed. The drainage tube 21 and the universal tube 13 are in a "cross" shape.

[0037] Reference Figure 2 and Figure 3 The adjusting portion 22 includes a slide plate 221, a first baffle plate 222, a second baffle plate 223 and a spring 224. Two slide plates 221 are provided. The two slide plates 221 are symmetrically arranged along the axial direction of the universal tube 13. The slide plates 221 are rectangular plate-shaped and vertically arranged. The slide plates 221 are slidably connected to the drainage tube 21, and the sliding direction is the axial direction of the drainage tube 21.

[0038] Reference Figures 1 to 3The two slide plates 221 are arranged to be inclined on one side thereof and close to each other in the direction of the axis of the universal pipe 13 , and the distance between the inclined ends of the two slide plates 221 gradually decreases along the direction from the air inlet 11 to the direction close to the air outlet 12 .

[0039] Reference Figure 2 and Figure 3 There are two first baffles 222 , which are symmetrically arranged along the axial direction of the universal tube 13 . The first baffles 222 are in a rectangular plate shape and are vertically arranged. The first baffles 222 are perpendicular to the slide plate 221 and are fixedly connected to the slide plate 221 .

[0040] Reference Figure 2 and Figure 3 There are two second baffles 223, which are symmetrically arranged along the axial direction of the universal tube 13. The second baffle 223 is in the shape of a rectangular plate and is vertically arranged. The second baffle 223 is arranged parallel to the first baffle 222. The second baffle 223 is fixedly connected to the inner wall of the drainage tube 21 and is located on the side of the slide 221 close to the first baffle 222.

[0041] Reference Figure 2 and Figure 3 There are two springs 224, and the two springs 224 correspond to the two first baffles 222 one by one. The spring 224 is located between the first baffle 222 and the second baffle 223, and the two ends are respectively fixed to the first baffle 222 and the second baffle 223. In the initial state, the spring 224 is in a stretched state, and at this time, the two slide plates 221 are pressed against each other on the sides close to each other.

[0042] Reference Figure 2 The collecting portion 23 includes a limiting plate 231, a condensing tube 232 and a collecting box 233. The limiting plate 231 is in the shape of a circular plate. The outer periphery of the limiting plate 231 abuts against the inner periphery of the drainage tube 21. The limiting plate 231 is located at one end of the drainage tube 21 close to the horizontal axis of the frame 1, and is located on the side of the second baffle 223 away from the first baffle 222. The limiting plate 231 is slidably connected in the drainage tube 21, and the sliding direction is the axial direction of the drainage tube 21.

[0043] The condenser 232 is fixedly connected to one end of the drainage tube 21 away from the limiting plate 231, and the inlet end of the condenser 232 is flared, with the flaring direction being set toward the direction close to the limiting plate 231, the outer diameter of the flare is equal to the inner diameter of the drainage tube 21, and the flared end of the condenser 232 is located on the side of the second baffle 223 away from the limiting plate 231 close to the condenser 232.

[0044] The collecting box 233 is fixedly connected to the outer side of the frame 1 and communicated with the outlet end of the condensing pipe 232 . The collecting box 233 is communicated with a water outlet pipe 2331 , and a water stop valve 2332 is provided on the water outlet pipe 2331 .

[0045] When in use, when casting a small mold, when steam flows in the universal pipe 13, the steam squeezes the abutment position of the slide plate 221, and the steam applies pressure to the inclined surface of the slide plate 221, and the slide plate 221 drives the first baffle plate 222 to move, and the first baffle plate 222 squeezes the spring 224. Under the elastic force of the spring 224, a gap is opened between the two slide plates 221, allowing a small amount of steam to pass through; A large amount of steam flows along the slide plate 221 to both ends of the drainage tube 21. The limiting plate 231 guides the steam to flow toward one end of the condenser 232. The steam enters the condenser 232, and the steam condenses into liquid water. The liquid water flows into the collection box 233, thereby improving energy utilization efficiency and reducing production costs.

[0046] Reference Figure 2 , Figure 4 and Figure 5 There are two groups of second adjustment components 3 , and the two groups of second adjustment components 3 correspond one-to-one to the two groups of first adjustment components 2 . The second adjustment components 3 include a connecting rod 31 , a driving part 32 and a moving part 33 .

[0047] Reference Figure 2 , Figure 4 and Figure 5 The connecting rod 31 is vertically arranged, and the connecting rod 31 is sequentially passed through the frame 1 and the drainage tube 21, and is rotatably connected with the frame 1 and the drainage tube 21. The connecting rod 31 is located on the side of the limiting plate 231 away from the condensation tube 232. A screw cap 311 is fixed on one end of the connecting rod 31 located outside the frame 1.

[0048] Reference Figure 2 and Figure 5 The driving part 32 includes a bevel gear 1 321, a bevel gear 2 322 and a threaded sleeve 323. The bevel gear 1 321 is coaxially fixed to one end of the connecting rod 31 and is located in the drainage tube 21. The bevel gear 2 322 is meshed with the bevel gear 1 321 and is rotationally connected to the drainage tube 21.

[0049] The threaded sleeve 323 is coaxially fixed to the second bevel gear 322 and is located on a side of the second bevel gear 322 close to the condenser 232 . The axial direction of the threaded sleeve 323 is parallel to the axial direction of the drainage tube 21 .

[0050] Reference Figure 5 The moving part 33 includes a threaded rod 331 and a guide rod 332 . The threaded rod 331 is threadedly connected to the threaded sleeve 323 , and one end away from the threaded sleeve 323 is fixedly connected to the limiting plate 231 .

[0051] The axial direction of the guide rod 332 is set parallel to the axial direction of the threaded rod 331. One end of the guide rod 332 is passed through the limiting plate 231, and the other end is fixedly connected to the drainage tube 21. The guide rod 332 is located on the side of the threaded rod 331 away from the slide plate 221.

[0052] During use, when casting a large mold, the operator turns the screw cap 311, the screw cap 311 drives the connecting rod 31 to rotate, the connecting rod 31 drives the bevel gear 1 321 to rotate, the bevel gear 1 321 drives the bevel gear 2 322 to rotate, the bevel gear 2 322 drives the threaded sleeve 323 to rotate, the threaded sleeve 323 drives the threaded rod 331 to rotate, and under the action of the guide rod 332, the threaded rod 331 drives the limiting plate 231 to move, so that it is easy to dynamically adjust the steam flow inside the drainage pipe 21, and then it is easy to reduce the loss of steam.

[0053] The implementation principle of the air frame for lost foam mold in the embodiment of the present application is as follows: steam is introduced into the air inlet 11. When casting a small mold, the steam squeezes the abutment position of the slide plate 221, and a gap is opened between the two slide plates 221, so that a small amount of steam passes through. At the same time, the limiting plate 231 guides a large amount of steam to flow toward one end of the condenser pipe 232. The steam enters the condenser pipe 232, and the steam condenses into liquid water, which flows into the collection box 233. When casting a large mold, the screw cap 311 drives the connecting rod 31 to rotate, the connecting rod 31 drives the bevel gear 1 321 to rotate, the bevel gear 1 321 drives the bevel gear 2 322 to rotate, the bevel gear 2 322 drives the threaded sleeve 323 to rotate, the threaded sleeve 323 drives the threaded rod 331 to rotate, and under the action of the guide rod 332, the threaded rod 331 drives the limiting plate 231 to move, so that it is easy to dynamically adjust the steam flow inside the drainage pipe 21, and then it is easy to reduce the loss of steam.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air frame for a lost foam mold, characterized in that: include: A frame (1), the frame (1) being hollow inside and having an air inlet (11) and an air outlet (12) respectively formed at two ends; A first regulating component (2), wherein the first regulating component (2) is provided in a plurality of groups, the plurality of groups of the first regulating components (2) being arranged around the circumference of the frame (1), the first regulating component (2) being arranged in the frame (1) and being used to reduce the flow rate of the steam airflow; A second regulating component (3), wherein the second regulating component (3) is provided in a plurality of groups, the plurality of groups of the first regulating components (2) correspond one to one with the plurality of groups of the second regulating components (3), the second regulating component (3) is provided on the first regulating component (2), and is used to increase the flow rate of the steam airflow.

2. The air frame for lost foam mold according to claim 1, characterized in that: A universal tube (13) is arranged inside the frame (1), the axis of the universal tube (13) is arranged to be co-axial with the axis of the frame (1), a hollow structure is formed between the inner wall of the frame (1) and the universal tube (13), and a heat-insulating material is filled in the hollow structure, and an air inlet (11) and an air outlet (12) are also provided at positions of the universal tube (13) corresponding to the frame (1).

3. The air frame for lost foam mold according to claim 2, characterized in that: The first adjustment component (2) comprises: a drainage tube (21), the drainage tube (21) being located in the frame (1) and fixedly connected to the universal tube (13), the drainage tube (21) and the universal tube (13) being in a "cross" shape; an adjusting portion (22), the adjusting portion (22) being arranged in the drainage pipe (21) and being used to reduce the flow rate of the steam airflow; A collecting portion (23), wherein the collecting portion (23) is arranged in the drainage pipe (21) and is used to condense and collect excess steam.

4. The air frame for lost foam mold according to claim 3, characterized in that: The adjustment unit (22) comprises: A slide plate (221), wherein two slide plates (221) are provided, and the two slide plates (221) are symmetrically arranged along the axial direction of the universal tube (13); the slide plates (221) are slidably connected in the drainage tube (21), and the sliding direction is the axial direction of the drainage tube (21); a first baffle (222), wherein two first baffles (222) are provided, and the two first baffles (222) are symmetrically arranged along the axis direction of the universal tube (13), and the first baffles (222) are fixedly connected to the slide plate (221); a second baffle (223), wherein two second baffles (223) are provided, and the two second baffles (223) are symmetrically arranged along the axial direction of the universal tube (13), and the second baffles (223) are fixedly connected to the inner wall of the drainage tube (21) and are located on a side of the slide plate (221) close to the first baffle (222); A spring (224), wherein two springs (224) are provided, and the two springs (224) correspond one to one to the two first baffles (222); the spring (224) is located between the first baffle (222) and the second baffle (223), and two ends of the spring (224) are respectively fixedly connected to the first baffle (222) and the second baffle (223); In the initial state, the spring (224) is in a stretched state, at which time the two sliding plates (221) are pressed against each other at the sides close to each other.

5. The air frame for lost foam mold according to claim 4, characterized in that: The collecting unit (23) comprises: a limiting plate (231), the limiting plate (231) being arranged on one end of the drainage tube (21); a condenser tube (232), the condenser tube (232) being fixedly connected to an end of the drainage tube (21) away from the limiting plate (231); A collecting box (233), the collecting box (233) is fixedly connected to the outside of the frame (1) and is connected to an end of the condensing pipe (232) away from the limiting plate (231).

6. The air frame for lost foam mold according to claim 4, characterized in that: The abutting sides of the two slide plates (221) are arranged to be inclined in a direction close to each other and towards the axis of the universal tube (13).

7. The air frame for lost foam mold according to claim 5, characterized in that: The second adjustment component (3) comprises: A connecting rod (31), the connecting rod (31) being sequentially passed through the frame (1) and the drainage pipe (21), and being located on a side of the limiting plate (231) away from the condensing pipe (232); a driving portion (32), the driving portion (32) being arranged on the connecting rod (31) and being used to drive the moving portion (33) to move; A moving part (33), the moving part (33) is arranged on the driving part (32) and is used to drive the limiting plate (231) to move.

8. The air frame for lost foam mold according to claim 7, characterized in that: The driving unit (32) comprises: Bevel gear one (321), the bevel gear one (321) being coaxially fixedly connected to one end of the connecting rod (31) and being located in the drainage tube (21); Bevel gear 2 (322), the bevel gear 2 (322) meshes with the bevel gear 1 (321) and is rotationally connected to the drainage tube (21); A threaded sleeve (323), wherein the threaded sleeve (323) is coaxially fixed to the second bevel gear (322) and is located on a side of the second bevel gear (322) close to the condenser (232).

9. The air frame for lost foam mold according to claim 8, characterized in that: The moving part (33) comprises: a threaded rod (331), the threaded rod (331) being threadedly connected to the threaded sleeve (323), and one end of the threaded rod (331) away from the threaded sleeve (323) being fixedly connected to the limiting plate (231); A guide rod (332), wherein the axial direction of the guide rod (332) is arranged parallel to the axial direction of the threaded rod (331), one end of the guide rod (332) is passed through the limiting plate (231), and the other end is fixedly connected to the drainage tube (21).

10. The air frame for lost foam mold according to claim 7, characterized in that: A screw cap (311) is fixedly provided on one end of the connecting rod (31) located outside the frame (1).

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