A coated sand mold for an automobile engine intake pipe that is easy to demould

Abstract

The present invention relates to the field of mold technology, and specifically discloses a coated sand mold that is easy to demold for an automobile engine intake pipe, wherein the mold box is fixed on a bracket, and a shaking mechanism comprises a moving frame, a driving mechanism and at least three elastic connecting parts fixed on the mold box, and a bearing part is commonly fixed on one end of all the elastic connecting parts away from the mold box, and a core is made of coated sand, and a filling device is installed on the bracket, and can fill the filling sand into a containing space; the coated sand mold that is easy to demold for an automobile engine intake pipe of the present invention, after the intake pipe is cast, the core collapses under the influence of high temperature, and the collapsed coated sand is discharged, and the driving mechanism is controlled to drive the moving frame to move up and down, so as to drive the bearing part to move up and down, so that the intake pipe performs an up-and-down action, and the residual coated sand on the intake pipe will be shaken off, thereby improving the convenience of cleaning the residual coated sand in the intake pipe and facilitating the demolding of the automobile engine intake pipe.

Description

Technical Field

[0001] The invention relates to the technical field of moulds, and in particular to a coated sand mould for an intake pipe of an automobile engine which is easy to demould. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging molding, smelting, stamping and other methods. In short, molds are tools used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the molded material. Molds are divided into different types, such as sand core molds, etc., and the use of coated sand in sand core molds has gradually become widespread. Coated sand is a molding sand or core sand with a layer of solid resin film on the surface of the sand grains before molding.

[0003] When casting the automobile engine intake pipe, the casting process of coated sand is often used. Generally, the core of the automobile engine intake pipe is first made of coated sand, so that the core forms a cavity, and the cavity is consistent with the automobile engine intake pipe, and then the molten metal is poured into the cavity of the core. After the molten metal is cooled, it is formed into the automobile engine intake pipe, and the residual coated sand on the outside of the automobile engine intake pipe can be cleaned.

[0004] However, in the related art, the sand core is not convenient for demoulding the air intake pipe, and coated sand is easily left on the surface of the air intake pipe, which is difficult to clean, thus easily leading to slow product output, inconvenience for users, and poor performance. Summary of the invention

[0005] The present invention provides a coated sand mold for an automobile engine intake pipe that is easy to demould, aiming to solve the problem in the related art that the sand core is not convenient for demoulding the intake pipe, and coated sand is easily left on the surface of the intake pipe, which is difficult to clean, thus easily leading to slow product output, inconvenience for users, and poor performance.

[0006] The coated sand mold for the automobile engine air intake pipe that is easy to demould comprises a bracket and also comprises: A mold box is fixed on the bracket, and the mold box has a containing space; The shaking mechanism comprises a moving frame, a driving mechanism and at least three elastic connecting members fixed on the mold box, the moving frame is connected to the mold box with a single degree of freedom sliding, the driving mechanism is installed on the bracket and the mold box, the driving mechanism can drive the moving frame to move up and down, and all the elastic connecting members are commonly fixed with a bearing member at one end away from the mold box, the bearing member and each elastic connecting member are placed in the accommodating space, the bearing member is made of a flexible material, and the bearing member is located directly above the moving frame; A core is made of coated sand, the core is arranged in the accommodation space and located above the carrier, and the core has a cavity capable of forming an intake pipe of an automobile engine; The filling device is installed on the bracket and can fill the filling sand into the containing space.

[0007] Preferably, the mold box comprises a frame body fixed on a bracket, a guide plate is fixed inside the frame body, and the accommodating space is surrounded by a top surface of the guide plate and an inner wall of the frame body.

[0008] Preferably, the guide plate is arranged at an angle, and a sand outlet is formed between the bottom of the guide plate and the frame. A discharge hopper is fixedly provided on the bottom of the guide plate and the frame. The discharge hopper is larger at the top and smaller at the bottom. The upper opening of the discharge hopper is connected to the sand outlet, and the lower opening of the discharge hopper is opposite to the feed end of the filling device. A valve is also installed at the lower opening of the discharge hopper to control the opening or closing of the lower opening of the discharge hopper.

[0009] Preferably, the movable frame includes a vertically arranged guide rod, the guide rod is slidably arranged on the guide plate with a single degree of freedom, a top frame is fixedly provided on the top of the guide rod, the top frame is located directly below the bearing member, and the upward movement of the top frame can drive the bearing member to move upward.

[0010] Preferably, the driving mechanism includes a first guide seat fixed on the guide plate, a second guide seat fixed on the guide plate, a telescopic driving device fixed on the bracket, and a guide rail fixed on the bottom of the guide rod, the bottom of the first guide seat has a first inclined guide surface, the second guide seat has a second inclined guide surface, the movable end of the telescopic driving device is fixedly provided with a rotation driving device, the movable end of the rotation driving device is fixedly provided with a gear, a transmission rod is connected with a single degree of freedom sliding connection in the guide rail, the transmission rod is fixedly provided with a first matching block, a second matching block and a rack, the first matching block has a first matching inclined surface located directly below the first inclined guide surface above, the second matching block has a second matching inclined surface located directly above the second inclined guide surface below, and the rack is meshed with the gear.

[0011] Preferably, a T-shaped slot is provided at the bottom of the guide rail, and a T-shaped boss adapted to the T-shaped slot is provided at the top of the transmission rod, so that the T-shaped boss is restricted to slide in a single degree of freedom direction in the T-shaped slot.

[0012] Preferably, the bearing member comprises a supporting net, the edge of the supporting net is sewn with an edging, the elastic connecting member is fixed on the edging, the supporting net is woven by interlacing steel wires, and the edging is made of nylon cloth.

[0013] Preferably, the filling device includes an auger conveyor fixedly mounted on a bracket, the auger conveyor is vertical, the feed end of the auger conveyor is fixedly connected to a collecting box, the top of the collecting box has an opening, the opening of the collecting box is located directly below the lower opening of the discharge hopper, the discharge end of the auger conveyor is fixedly connected to a discharge port, the outlet of the discharge port is located directly above the accommodating space.

[0014] Preferably, the horizontal plane where the bearing member is located and the central axes of each elastic connecting member are all in the same horizontal plane.

[0015] Preferably, the bracket comprises a bottom plate, a plurality of support plates are welded on the bottom plate, and the mold box is welded to the support plates.

[0016] The beneficial effect of the present invention is that when in use, the filling device is first controlled to convey the filling sand into the accommodating space until the filling sand covers the carrier, the manufactured core is placed in the filling sand in the accommodating space, the filling device is controlled to convey the filling sand into the accommodating space again, the core is buried, only the pouring port on the core is exposed, and then the molten metal liquid is injected from the pouring port of the core, the metal liquid is cooled and formed into the automobile engine intake pipe, and at the same time, the core made of the coated sand collapses under the influence of the high temperature of the metal liquid, the collapsed coated sand and filling sand are discharged, the automobile engine intake pipe falls on the supporting net, and the driving mechanism is controlled to drive The movable frame moves upward, driving the bearing member upward, while the elastic connecting member is stretched and stored, and then the driving mechanism is controlled to release the movable frame, and the movable frame and the bearing member move downward under their own weight and the elastic force of the elastic connecting member, so that the intake pipe of the automobile engine falls on the supporting net and performs an upward throwing action. The coated sand remaining on the intake pipe of the automobile engine will be shaken off under the upward throwing action and the impact with the supporting net, which effectively improves the convenience of cleaning the coated sand remaining on the surface of the intake pipe of the automobile engine, facilitates the demoulding of the intake pipe of the automobile engine, thereby increasing product output, facilitating users to use, and improving its performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention.

[0018] Figure 2 It is a schematic structural diagram of a support, a mold box and a filling device in a specific embodiment of the present invention.

[0019] Figure 3 It is a three-dimensional cross-sectional view of a mold box according to a specific embodiment of the present invention.

[0020] Figure 4 It is a structural schematic diagram of a shaking mechanism in a specific embodiment of the present invention.

[0021] Figure 5It is a schematic structural diagram of a mobile frame, an elastic connecting member and a bearing member in a specific embodiment of the present invention.

[0022] Figure 6 It is a schematic diagram of the structure of the driving mechanism of a specific embodiment of the present invention.

[0023] Figure 7 It is a cross-sectional view of a driving mechanism of a specific embodiment of the present invention.

[0024] Figure 8 It is a structural schematic diagram of a specific embodiment of the present invention in which a core is placed in the filling sand in the accommodating space.

[0025] Reference numerals: 10. bracket; 11. bottom plate; 12. support plate; 20. mold box; 21. frame; 22. guide plate; 23. accommodating space; 24. sand outlet; 25. discharge hopper; 26. valve; 30. shaking mechanism; 31. moving frame; 311. guide rod; 312. top frame; 32. driving mechanism; 321. first guide seat; 3211. first inclined guide surface; 322. second guide seat; 3221. second inclined guide surface; 323 , telescopic drive device; 324, guide rail; 325, rotation drive device; 326, transmission rod; 327, first matching block; 3271, first matching slope; 328, second matching block; 3281, second matching slope; 33, elastic connecting member; 34, bearing member; 341, supporting net; 342, edging; 40, core; 50, filling device; 51, auger conveyor; 52, collecting box; 53, discharge port. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1-Figure 8As shown, the coated sand mold for the automobile engine intake pipe that is easy to demold of the present invention includes a bracket 10, which can support the coated sand mold for the entire automobile engine intake pipe that is easy to demold, a mold box 20 is fixedly installed on the bracket 10, and a shaking mechanism 30 is installed on the mold box 20 and the bracket 10. The mold box 20 contains a core 40, and the core 40 is made of coated sand. The core 40 has a cavity that can be made into an intake pipe. A filling device 50 is installed on the bracket 10, and the filling device 50 can fill the filling sand into the mold box 20 to bury the core 40. The shaking mechanism 30 can drive the intake pipe after casting to move, so as to shake off the sand on the automobile engine intake pipe to complete the demolding of the automobile engine intake pipe.

[0028] refer to Figure 1-Figure 4 As shown, the bracket 10 includes a bottom plate 11, on which a plurality of support plates 12 are welded, and the mold box 20 includes a frame 21, the bottom of the frame 21 is welded to at least one support plate 12, and a guide plate 22 is welded inside the frame 21, and the guide plate 22 is arranged at an angle, and the filling sand and the coating sand can move along the inclined guide of the guide plate 22. In this embodiment, the angle between the guide plate 22 and the horizontal plane is 15-30 degrees, and an accommodating space 23 is enclosed between the upper inclined surface of the guide plate 22 and the inner wall of the frame 21, and the accommodating space 23 can accommodate the filling sand and the core 40, and the bottom of the guide plate 22 is adjacent to the inner wall of the frame 21. A sand outlet 24 is formed between the frame 21 for discharging the filling sand and coated sand in the accommodating space 23. A discharge hopper 25 is welded between the bottom of the guide plate 22 and the frame 21. The discharge hopper 25 is larger at the top and smaller at the bottom. The upper opening of the discharge hopper 25 is connected to the sand outlet 24. The lower opening of the discharge hopper 25 is opposite to the feed end of the filling device 50. The filling sand and coated sand discharged from the sand outlet 24 can be received by the discharge hopper 25 and directed to the feed end of the filling device 50. A valve 26 is also installed at the lower opening of the discharge hopper 25. The valve 26 can control the opening or closing of the lower opening of the discharge hopper 25.

[0029] refer to Figure 1 , Figure 4-Figure 7As shown, the shaking mechanism 30 includes a moving frame 31, a driving mechanism 32 and at least three elastic connecting members 33 fixedly connected to the inner side of the frame 21. The moving frame 31 is slidably connected to the guide plate 22 with a single degree of freedom. The driving mechanism 32 is installed on the bracket 10 and the guide plate 22. The driving mechanism 32 can drive the moving frame 31 to move up and down. The ends of all the elastic connecting members 33 away from the frame 21 are commonly fixedly connected with a bearing member 34. The moving frame 31, the bearing member 34 and each elastic connecting member 33 are all placed in the accommodating space 23, and the plane where the bearing member 34 is located and the central axis of each elastic connecting member 33 are all in the same plane. The supporting member 34 is located directly above the movable frame 31. It should be specifically explained that the supporting member 34 includes a supporting net 341. The edge of the supporting net 341 is sewn with an edging 342. The supporting net 341 and the edging 342 are both made of flexible materials. All elastic connecting members 33 are evenly distributed on the outer edge of the edging 342. Each elastic connecting member 33 includes a tension spring and two connecting blocks. The two ends of the tension spring are respectively welded to the two connecting blocks, and the two connecting blocks are respectively welded to the edging 342 and the mold box 20. Exemplarily, the supporting net 341 is woven from steel wires that are interlaced with each other, and the edging 342 is made of nylon cloth.

[0030] Continue to refer Figure 5 As shown, exemplarily, the movable frame 31 includes a vertically arranged guide rod 311. In this embodiment, the guide rod 311 is square, and a square hole matching the guide rod 311 is opened on the guide plate 22, so that the guide rod 311 can be restricted in the square hole on the guide plate 22 to slide up and down, and a top frame 312 is welded on the top of the guide rod 311. The top frame 312 is located directly below the bearing member 34. The top frame 312 is a steel structure, and the upward movement of the top frame 312 can drive the bearing member 34 to move upward.

[0031] refer to Figure 6-Figure 8As shown, the driving mechanism 32 includes a first guide seat 321 welded on the guide plate 22, a second guide seat 322 welded on the guide plate 22, a telescopic driving device 323 fixedly mounted on the bracket 10, and a guide rail 324 welded on the bottom of the guide rod 311. The bottom of the first guide seat 321 has a first inclined guide surface 3211, and the second guide seat 322 has a second inclined guide surface 3221. The movable end of the telescopic driving device 323 is fixedly mounted with a rotating driving device 325. In this embodiment, the telescopic driving device 323 is a cylinder, and the rotating driving device 325 is a reduction motor. The movable end of the rotating driving device 325 is fixedly mounted with a gear, and a transmission rod 326 is slidably connected with a single degree of freedom in the guide rail 324. It should be noted that a T-shaped groove is provided at the bottom of the guide rail 324, and a T-shaped boss adapted to the T-shaped groove is provided at the top of the transmission rod 326 so that the T-shaped boss is restricted to slide in a single degree of freedom direction in the T-shaped groove. A first matching block 327, a second matching block 328 and a rack are welded on the transmission rod 326. The first matching block 327 is located below the first guide seat 321, and the first matching block 327 has a first matching inclined surface 3271 located directly below the first inclined guide surface 3211 above the first matching block 327. The second matching block 328 is located above the second guide seat 322, and the second matching block 328 has a second matching inclined surface 3281 located directly above the second inclined guide surface 3221, and the rack is meshed with the gear.

[0032] Controlling the rotation drive device 325 can drive the gear to rotate. The rotation of the gear can drive the rack to move upward through the meshing of the gear and the rack. The upward movement of the rack can drive the transmission rod 326, the first matching block 327 and the second matching block 328 to move upward. The upward movement of the transmission rod 326 can drive the guide rod 311 to realize the upward movement function through the guide rail 324. The upward movement of the first matching block 327 can make the first matching inclined surface 3271 contact the first inclined guide surface 3211, and force the first matching block 327 to move along the first inclined guide surface 3211 until the first matching block 327 moves and drives the rack to move through the transmission rod 326 and disengage from the gear. Once the rack moves and disengages from the gear, the transmission rod 326, the guide rail 324 and the guide rod 311 move downward under their own weight. During the downward movement, the second matching inclined surface 3281 on the second matching block 328 contacts the second inclined guide surface 3221, and under the guidance of the second inclined guide surface 3221, the second matching block 328 is forced to move. The second matching block 328 moves and drives the rack to move toward the gear again through the transmission rod 326, so that the rack re-engages the gear, thereby realizing the function of driving the movable frame 31 to move up and down.

[0033] The core 40 is formed by pressing coated sand, and a cavity capable of molding an intake pipe of an automobile engine is formed therein. The metal is melted and poured into the cavity to mold the intake pipe of the automobile engine.

[0034] refer to Figure 1 and Figure 2As shown, the filling device 50 includes an auger conveyor 51 fixedly mounted on the bracket 10, the auger conveyor 51 is vertical, the feed end of the auger conveyor 51 is fixedly connected to a collecting box 52, filling sand is collected in the collecting box 52, the top of the collecting box 52 has an opening, and the opening is located directly below the lower opening of the discharge hopper 25, the discharge end of the auger conveyor 51 is fixedly connected to a discharge port 53, and the outlet of the discharge port 53 is located directly above the accommodating space 23.

[0035] When in use, the auger conveyor 51 is first controlled to convey the filling sand collected in the collecting box 52 to the accommodating space 23 through the discharge port 53 until the filling sand covers the carrier 34, and the manufactured core 40 is placed in the filling sand in the accommodating space 23, and the filling device 50 is controlled again to convey the filling sand to the accommodating space 23 to bury the core 40, leaving only the pouring port (such as the pouring port) on the core 40 exposed. Figure 8 As shown in the figure, the melted metal liquid is then injected from the pouring port of the core 40, and the metal liquid is cooled and formed into the automobile engine intake pipe. At the same time, the core 40 made of coated sand collapses under the influence of the high temperature of the metal liquid. The valve 26 is opened, and the collapsed coated sand and filling sand in the accommodation space 23 are discharged through the sand outlet 24 and the discharge hopper 25, and fall into the collection box 52 for recollection, and serve as the filling sand for the next pouring work. The automobile engine intake pipe falls on the support net 341.

[0036] Then, the rotation driving device 325 is controlled to drive the gear to rotate. The rotation of the gear drives the rack to move upward through the meshing of the gear and the rack. The upward movement of the rack drives the transmission rod 326, the first matching block 327 and the second matching block 328 to move upward. The transmission rod 326 moves upward and drives the guide rod 311 to move upward through the guide rail 324. The guide rod 311 moves upward and drives the top frame 312 to move upward. The top frame 312 moves upward and drives the bearing member 34 to move upward. At the same time, the elastic connecting member 33 stretches and accumulates force until the first matching block 327 moves upward to make the first matching inclined surface 3271 contact the first inclined guide surface 3211, and forces the first matching block 327 to move along the first inclined guide surface 3211. The first matching block 327 moves and drives the rack to move through the transmission rod 326 and disengage from the gear. Once the rack moves and disengages from the gear, the transmission rod 326, the guide rail 324, the guide rod 311 and the bearing member 34 move downward rapidly under their own weight and the elastic force of the elastic connecting member 33. During the downward movement, the second matching block 32 The second matching inclined surface 3281 on 8 contacts the second inclined guide surface 3221, and under the guiding action of the second inclined guide surface 3221, the second matching block 328 is forced to move, and the second matching block 328 moves through the transmission rod 326 to drive the rack to move toward the gear again, so that the rack re-engages the gear. At the same time, the automobile engine intake pipe falls and lands on the support net 341 again, performing an upward throwing action. The coated sand remaining on the automobile engine intake pipe will be shaken off under the upward throwing action and the impact with the support net 341, thereby improving the demoulding efficiency of the automobile engine intake pipe. Since the support net 341 is flexible, the impact force falling on the support net 341 will cause the support net 341 to deform, so as to buffer the intake pipe and avoid damaging the intake pipe.

[0037] On the other hand, when the air intake pipe is controlled to move upward, the telescopic driving device 323 is controlled to extend, which can drive the rotating driving device 325, the gear, the rack, the transmission rod 326 and the first matching block 327 to move along the guide rail 324, so that the first matching block 327 avoids the first guide seat 321. In this way, the first matching block 327 will not contact the first guide seat 321 when moving upward, and the engagement of the gear and the rack will not be disengaged, which can drive the automobile engine intake pipe to move up to the top of the accommodating space 23, so as to facilitate the removal of the automobile engine intake pipe.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A coated sand mold for an automobile engine intake pipe that is easy to demould, comprising a bracket (10), characterized in that: Also includes: A mold box (20) is fixedly mounted on the support (10), and the mold box (20) has a receiving space (23); The shaking mechanism (30) comprises a moving frame (31), a driving mechanism (32) and at least three elastic connecting members (33) fixedly mounted on the mold box (20); the moving frame (31) is slidably connected to the mold box (20) with a single degree of freedom; the driving mechanism (32) is mounted on the bracket (10) and the mold box (20); the driving mechanism (32) can drive the moving frame (31) to move up and down; a bearing member (34) is fixedly mounted at one end of all the elastic connecting members (33) away from the mold box (20); the bearing member (34) and each elastic connecting member (33) are all placed in the accommodating space (23); the bearing member (34) is made of a flexible material; and the bearing member (34) is located directly above the moving frame (31); A core (40) is made of coated sand, the core (40) is arranged in the accommodating space (23) and located above the carrier (34), and the core (40) has a cavity capable of forming an intake pipe of an automobile engine; The filling device (50) is installed on the bracket (10) and is capable of filling the filling sand into the containing space (23).

2. The easily demouldable coated sand mold for the automobile engine intake pipe according to claim 1, characterized in that: The mold box (20) comprises a frame (21) fixedly mounted on a bracket (10), a guide plate (22) being fixedly mounted inside the frame (21), and the accommodating space (23) being surrounded by a top surface of the guide plate (22) and an inner wall of the frame (21).

3. The easily demouldable coated sand mold for the automobile engine intake pipe according to claim 2, characterized in that: The guide plate (22) is arranged at an angle, and a sand outlet (24) is formed between the bottom of the guide plate (22) and the frame (21). A discharge hopper (25) is fixedly provided between the bottom of the guide plate (22) and the frame (21). The discharge hopper (25) is in a shape of being larger at the top and smaller at the bottom. The upper opening of the discharge hopper (25) is communicated with the sand outlet (24), and the lower opening of the discharge hopper (25) is directly opposite to the feed end of the filling device (50). A valve (26) is also installed at the lower opening of the discharge hopper (25) to control the opening or closing of the lower opening of the discharge hopper (25).

4. The easily demouldable coated sand mold for the automobile engine intake pipe according to claim 2, characterized in that: The movable frame (31) comprises a vertically arranged guide rod (311), the guide rod (311) being arranged on the guide plate (22) in a single degree of freedom sliding manner, a top frame (312) being fixedly arranged on the top of the guide rod (311), the top frame (312) being located directly below the bearing member (34), and the top frame (312) being able to move upward to push the bearing member (34) upward.

5. The easily demouldable coated sand mold for the automobile engine intake pipe according to claim 4, characterized in that: The driving mechanism (32) comprises a first guide seat (321) fixedly mounted on the guide plate (22), a second guide seat (322) fixedly mounted on the guide plate (22), a telescopic driving device (323) fixedly mounted on the bracket (10), and a guide rail (324) fixedly mounted on the bottom of the guide rod (311), wherein the bottom of the first guide seat (321) has a first inclined guide surface (3211), and the second guide seat (322) has a second inclined guide surface (3221), and a rotating driving device (325) is fixedly mounted on the movable end of the telescopic driving device (323), and the rotating driving device (325) is fixedly mounted on the bracket (10). A gear is fixedly provided at the movable end of the driving device (325); a transmission rod (326) is slidably connected with a single degree of freedom in the guide rail (324); a first matching block (327), a second matching block (328) and a rack are fixedly provided on the transmission rod (326); the first matching block (327) has a first matching inclined surface (3271) located directly below the first inclined guide surface (3211) at the top; the second matching block (328) has a second matching inclined surface (3281) located directly above the second inclined guide surface (3221); and the rack is meshed with the gear.

6. The easily demouldable coated sand mold for the automobile engine intake pipe according to claim 5, characterized in that: The bottom of the guide rail (324) is provided with a T-shaped slide groove, and the top of the transmission rod (326) is provided with a T-shaped boss adapted to the T-shaped slide groove, so that the T-shaped boss is restricted to slide in a single degree of freedom direction within the T-shaped slide groove.

7. The easily demouldable coated sand mold for the automobile engine intake pipe according to claim 1, characterized in that: The bearing member (34) comprises a supporting net (341), the edge of the supporting net (341) is sewn with an edge (342), the elastic connecting member (33) is fixed on the edge (342), the supporting net (341) is woven by interlacing steel wires, and the edge (342) is made of nylon cloth.

8. The easily demouldable coated sand mold for the automobile engine intake pipe according to claim 3, characterized in that: The filling device (50) comprises an auger conveyor (51) fixedly mounted on a support (10), the auger conveyor (51) being vertically shaped, a feeding end of the auger conveyor (51) being fixedly connected to a collecting box (52), a top of the collecting box (52) having an opening, the opening of the collecting box (52) being located directly below a lower opening of a discharging hopper (25), and a discharging end of the auger conveyor (51) being fixedly connected to a discharge port (53), the outlet of the discharge port (53) being located directly above the accommodating space (23).

9. The easily demouldable coated sand mold for the automobile engine intake pipe according to any one of claims 1 to 8, characterized in that: The horizontal plane where the bearing member (34) is located and the central axes of each elastic connecting member (33) are all located in the same horizontal plane.

10. The easily demouldable coated sand mold for the automobile engine intake pipe according to any one of claims 1 to 8, characterized in that: The bracket (10) comprises a bottom plate (11), a plurality of support plates (12) are welded to the bottom plate (11), and the mold box (20) is welded to the support plates (12).

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