Precisely-formed automobile part casting device

Abstract

The invention discloses a precisely-formed automobile part casting device, and relates to the technical field of automobile part production equipment. The precisely-formed automobile part casting device comprises a mixing tank, disturbance pieces which are provided with double-helix structures and are symmetrically distributed, a casting device body which is arranged in the mixing tank, a casting device body which is arranged in the mixing tank, a casting device body which is arranged in the mixing tank, a casting device body which is arranged in the casting device body, and a casting device body which is arranged in the casting device body and used for casting the casting device body and used for casting the casting device body. The material upturning device is used for upturning materials close to the bottom of the outer wall in the mixing tank and then circulating to the bottom; through the design of the stirring pieces which are symmetrically distributed in a double-helix structure, three-dimensional circulating flow of materials in the casting device is achieved, the problem of mixing dead angles existing in a traditional stirring mode is effectively solved, bottom sediment materials can be continuously turned upwards and recycled, the mixing uniformity of molding sand and a binder is remarkably improved, and the casting efficiency is improved. And the generation probability of casting air holes and other defects is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile parts production equipment, and in particular relates to a precision-molded automobile parts casting device. Background Art

[0002] With the rapid development of the automobile industry, the requirements for the precision and quality of automobile parts are getting higher and higher. When producing some automobile parts, the workpiece is generally cast by sand casting. Since the molding materials used in sand casting are cheap and easy to obtain, the casting mold is simple to manufacture, and it can adapt to the single-piece production, batch production and mass production of castings, it has long been the basic process in casting production. The production of many automobile parts requires the use of sand casting technology.

[0003] In order to improve the precision of workpiece casting, it is generally necessary to mix the model raw material sand, binder and additives required in the sand casting process according to the proportion. However, in the existing sand mixing equipment, the binder may be locally enriched during the sand mixing process, resulting in inconsistent strength and hardness of different parts of the sand mold. If the binder cannot be fully combined with the surface of the sand particles, the molten metal may break the sand mold during the pouring process, resulting in defects in the casting. For this reason, we propose a precision-molded automotive parts casting device to solve the above-mentioned problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a precision molding automobile parts casting device that can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a precision-molded automobile parts casting device, including a mixing tank, a feed port is arranged on the top of the mixing tank, a discharge port is installed at the bottom of the mixing tank, a valve is arranged on the discharge port, and also includes: a disturbance member with a double helix structure symmetrically distributed, arranged in the mixing tank, used to turn over the material near the bottom of the outer wall in the mixing tank and recirculate it to the bottom; one end of the disturbance member is connected to a driving member, and the driving member is embedded and installed on the top inner wall of the mixing tank; a T-shaped rod is arranged on one side of the inner wall of the mixing tank, and a vibrating member is installed on one side of the T-shaped rod; a swingable annular injection pipe is located directly below the feed port and is arranged in the mixing tank, used to preliminarily spray a binder on the surface of the molding sand, and when the annular injection pipe is driven by the driving member to operate and produce reciprocating swings, it is used to drive the T-shaped rod to move and cause the mixing tank to vibrate.

[0006] Preferably, the driving member comprises a driving part installed on the inner wall of the top of the mixing tank, the output end of the driving part is fixedly connected to a connecting shaft, the end of the connecting shaft is fixedly connected to a worm, and the stirring member is fixedly connected to the worm.

[0007] Preferably, the stirring member includes a first spiral member fixed at one end of the worm, a driving gear is fixedly installed on one end surface of the first spiral member, a fixed plate is fixed on the surface of the first spiral member, the bottom of the fixed plate is located on both sides of the first spiral member and is rotatably connected to the second spiral member through bearings, and the surface of the second spiral member is connected to the driving gear through a synchronous belt.

[0008] Preferably, the surface of the worm is meshed with a worm wheel, a second support shaft is fixedly connected to the axis of the worm wheel, one end of the second support shaft is rotatably connected to the inner wall of the mixing tank through a bearing, one end of the second support shaft is located on one side of the worm wheel and is fixedly connected to a cam, and a pushing member is provided on one side of the cam.

[0009] Preferably, the pushing member includes a limit plate arranged on one side of the cam, one end of the limit plate is fixedly connected to a rack, one end of the rack is meshed with a meshing gear, a first support shaft is fixed at the axis of the meshing gear, one end of the first support shaft is fixedly connected to the annular injection pipe, one end of the rack is fixed with an elastic telescopic member, and the end of the elastic telescopic member is fixedly connected to the inner wall of the mixing tank.

[0010] Preferably, the outer wall of the first support shaft is rotatably connected to the inner wall of the mixing tank through a bearing, a delivery pipe is installed inside the first support shaft, one end of the delivery pipe is connected to the annular injection pipe, and a rotating joint is installed at the other end of the delivery pipe, and one end of the first support shaft passes through the mixing tank and extends to the outside.

[0011] Preferably, the vibrating member includes a movable block fixed at one end of a T-shaped rod, the movable block is slidably connected in a gas collecting cylinder, one end of the gas collecting cylinder is fixedly mounted on the inner wall of a mixing tank, one end of the movable block is fixedly connected to an impact rod, one side of the impact rod is located on the inner wall of the gas collecting cylinder and an impact block is mounted thereon, and a return spring is fixedly connected between the inner wall of the gas collecting cylinder and the movable block.

[0012] Preferably, one end of the air collecting cylinder is fixedly connected with an air suction pipe, one end of the air suction pipe passes through the mixing tank and extends to the outside, and a one-way valve is provided on the air suction pipe.

[0013] Preferably, one end of the air collecting cylinder is located on one side of the air intake pipe and is connected to an air outlet pipe, one end of the air outlet pipe passes through the mixing tank and is fixedly connected to an injection pipe, the injection pipe is fixedly installed on the inner wall of the mixing tank, and a nozzle is installed on the surface of the injection pipe, and the nozzles are staggered between two adjacent nozzles.

[0014] Preferably, a support frame is fixedly mounted on the outer wall of the mixing tank, a support leg is provided at the bottom of the support frame, and a vibration-damping pad is fixedly connected to the bottom of the support leg.

[0015] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: 1. The present invention realizes the three-dimensional circulation flow of materials in the casting device through the design of symmetrically distributed stirring elements with a double helix structure, which not only effectively solves the problem of mixing dead corners in traditional stirring methods, but also can continuously turn over and recirculate the bottom deposited materials, significantly improving the mixing uniformity of molding sand and binder, ensuring the consistency of physical properties of the molding sand core, and reducing the probability of defects such as air holes in the casting.

[0016] 2. The present invention combines the annular spray tube with the vibrating member. When the swingable annular spray tube sprays the binder, its mechanical movement synchronously drives the vibrating member to generate high-frequency micro-vibrations. This synergistic effect can not only achieve uniform atomization and coverage of the binder, but also simultaneously eliminate bubbles in the gaps between the molding sand, thereby effectively improving the compactness of the sand mold and greatly improving the dimensional accuracy and surface finish of the precision castings.

[0017] 3. The compressed air flow generated by the vibration part during operation of the present invention is transported and ejected through the nozzle, thereby effectively reducing the temperature of the disturbing part and the material in the mixing tank, improving the heat dissipation effect, and ensuring that the internal molding sand additive has a better bonding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the attached picture: Figure 1 This is a schematic diagram of the overall structure of a precision-molded automotive component casting device proposed by the present invention; Figure 2 This is a schematic diagram of the top view of a precision-molded automobile component casting device proposed by the present invention; Figure 3 This is a schematic diagram of the front cross-sectional structure of a precision-molded automobile component casting device proposed by the present invention; Figure 4 The present invention proposes Figure 3 A schematic diagram of the enlarged structure of the middle A area; Figure 5 A schematic diagram of a partial three-dimensional structure of a disturbance member proposed in the present invention; Figure 6 This is another partial three-dimensional structural schematic diagram of the disturbance member proposed by the present invention; Figure 7 This is a schematic diagram of the structure of an air jet pipe in a precision-molded automobile component casting device proposed by the present invention; Figure 8This is a schematic diagram of the top cross-sectional structure of a precision-molded automobile component casting device proposed by the present invention.

[0019] In the figure: 1. mixing tank; 101. support frame; 11. feed port; 12. discharge port; 13. valve; 2. driving member; 21. driving part; 22. connecting shaft; 23. worm; 24. first spiral member; 25. driving gear; 26. driven gear; 27. second spiral member; 28. fixed plate; 3. annular injection pipe; 31. first supporting shaft; 32. meshing gear; 33. rack; 331. elastic telescopic member; 34. limit plate; 35. cam; 36. second supporting shaft; 37. worm gear; 41. T-shaped rod; 42. air collecting cylinder; 43. movable block; 44. impact rod; 45. reset spring; 46. impact block; 47. suction pipe; 48. outlet pipe; 49. injection pipe; 491. injection head; 5. delivery pipe; 51. rotary joint. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0021] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0022] In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] Example 1: Reference Figure 1-Figure 8A precision-molded automobile parts casting device comprises a mixing tank 1, wherein a feed port 11 is arranged at the top of the mixing tank 1, a discharge port 12 is installed at the bottom of the mixing tank 1, and a valve 13 is arranged on the discharge port 12, and further comprises: a disturbance member with a double helix structure and symmetrically distributed, arranged in the mixing tank 1, and used to turn up the material near the bottom of the outer wall of the mixing tank 1 and recirculate it to the bottom; one end of the disturbance member is connected to a driving member 2, and the driving member 2 is embedded and installed on the top inner wall of the mixing tank 1; a T-shaped rod 41 is arranged at the mixing tank 1 ... A vibrating member is installed on one side of the inner wall of the mixing tank 1 and one side of the T-shaped rod 41; a swingable annular injection pipe 3 is located directly below the feed port 11 and is arranged in the mixing tank 1, and is used to preliminarily spray the binder on the surface of the molding sand. When the annular injection pipe 3 is driven by the driving member 2 to produce reciprocating swings, it is used to drive the T-shaped rod 41 to move and make the mixing tank 1 vibrate. A support frame 101 is fixedly installed on the outer wall of the mixing tank 1, and a support leg is arranged at the bottom of the support frame 101, and a vibration-damping pad is fixedly connected to the bottom of the support leg.

[0024] When the present invention is used, the molding sand material and other additives are poured into the interior of the mixing tank 1 from the feed port 11 in advance, wherein the binder required for the molding sand mixing is sprayed out through the annular injection pipe 3. In the early stage of the mixing stage, since the annular injection pipe 3 is located below the feed port 11 provided in the mixing tank 1, when the molding sand material mixed with other additives is poured into the mixing tank 1 from the feed port 11, the driving member 2 drives the disturbance member to rotate and operate. Due to the symmetrical reverse design of the double helical blades, the molding sand at the bottom of the mixing tank 1 is thrown up to the middle of the cavity under the shear force of the blades, and at the same time, the top material is diffused to the surroundings by the centrifugal force, forming a three-dimensional circulation flow. The double helical structure eliminates the mixing dead corners, avoids the local accumulation of the binder, makes the material mixing more uniform, and ensures the consistency of the sand core strength. When the material falls from the feed port 11, the annular injection pipe 3 is driven by the disturbance member to The repeated swinging operation allows the adhesive sprayed from the annular injection pipe 3 to better mix and contact with the falling molding sand, thereby improving the uniformity of the mixing of the adhesive and the molding sand, having a preliminary mixing effect, shortening the time for subsequent molding sand mixing, and improving the overall work efficiency. When the annular injection pipe 3 swings back and forth, the annular injection pipe 3 swings and hits the vibrating member, causing the vibrating member to move, and the inner wall of the mixing tank 1 can be knocked and vibrated to avoid residual material adhering to the inner wall of the mixing tank 1 and reduce the residual material in the mixing tank 1. At the same time, the vibrating member can perform a gas collection operation during operation, and the collected gas is then transported to the interior of the mixing tank 1, so that the material in the mixing tank 1 and the disturbing members inside the mixing tank 1 can be blown and cooled to prevent the running parts from high-temperature deformation and wear, extend the service life, and avoid the influence of workpiece stirring on the bonding effect of the adhesive.

[0025] Example 2: Reference Figure 5 and Figure 6, which is basically the same as Example 1, and further: the driving member 2 includes a driving part 21 installed on the inner wall of the top of the mixing tank 1, the output end of the driving part 21 is fixedly connected to a connecting shaft 22, the end of the connecting shaft 22 is fixedly connected to a worm 23, the stirring member is fixedly connected to the worm 23, the stirring member includes a first spiral member 24 fixed to one end of the worm 23, a driving gear 25 is fixedly installed on one end surface of the first spiral member 24, a fixing plate 28 is fixed on the surface of the first spiral member 24, the bottom of the fixing plate 28 is located on both sides of the first spiral member 24 and is rotatably connected to the second spiral member 27 through bearings, and the surface of the second spiral member 27 is transmission-connected to the driving gear 25 through a synchronous belt.

[0026] The above scheme is adopted, wherein the driving part 21 is replaced by a reduction motor drive. When the material is mixed, the driving part 21 is started to drive the connecting shaft 22 to rotate. The worm 23 is fixed at the end of the connecting shaft 22. The worm 23 is meshed with the worm wheel 37, which can drive another part of the components to operate in a linkage manner; the first spiral member 24 is coaxially fixed below the worm 23, wherein the first spiral member 24 is composed of a rotating shaft and a spiral blade, and is the main stirring member in the mixing tank 1. A fixed plate 28 is welded on its surface, and a slope is arranged on the top of the fixed plate 28 to prevent the material from remaining on the top surface of the fixed plate 28 during the falling process, which has a good diversion effect and can also be used for both sides. The auxiliary stirring member provides support and limitation to make the structure more stable. When the first spiral member 24 rotates, the driving gear 25 and the driven gear 26 are set to facilitate the synchronous reverse rotation of the second spiral members 27 on both sides. The material at the bottom of the mixing tank 1 close to the inner wall can be stirred and transported to the top at the same time. The turned-up material is then stirred and transported to the bottom by the first spiral member 24, thus forming a bidirectional rotating structure. The first spiral member 24 and the second spiral member 27 form a convective shear force. The material in the mixing tank 1 circulates in both directions from top to bottom and from bottom to top, effectively improving the mixing efficiency of the material. This double helix structure can effectively eliminate mixing dead corners and avoid local accumulation of adhesives.

[0027] Example 3: Reference Figure 4 , Figure 5 and Figure 6, which is basically the same as Example 2, and further, a worm gear 37 is meshedly driven on the surface of the worm 23, a second support shaft 36 is fixedly connected to the axis of the worm gear 37, one end of the second support shaft 36 is rotatably connected to the inner wall of the mixing tank 1 through a bearing, one end of the second support shaft 36 is located on one side of the worm gear 37 and is fixedly connected to a cam 35, one side of the cam 35 is provided with a pusher, the pusher includes a limit plate 34 provided on one side of the cam 35, one end of the limit plate 34 is fixedly connected to a rack 33, one end of the rack 33 is meshed with a meshing gear 32, a first support shaft 31 is fixed at the axis of the meshing gear 32, one end of the first support shaft 31 is fixedly connected to the annular injection pipe 3, one end of the rack 33 is fixed to an elastic telescopic member 331, and the end of the elastic telescopic member 331 is fixedly connected to the inner wall of the mixing tank 1.

[0028] In combination with the above embodiment, when the driving member 2 is driven to operate, the worm 23 and the worm wheel 37 are meshed to provide a stable torque, and the cam 35 is cooperated with to make the cam 35 reciprocate and squeeze the limit plate 34, and finally drive the annular injection pipe 3 to swing back and forth, thereby producing a linkage effect, so that the stirring member can perform a preliminary mixing of the binder and the molding sand while disturbing the mixed material. When the molding sand falls, the annular injection pipe 3 swings back and forth, so that the binder sprayed from the annular injection pipe 3 can contact the middle area of ​​the falling material, thereby increasing the contact area between the binder and the molding sand, and improving the mixing efficiency of the binder. With the subsequent stirring of the stirring member, the binder is more evenly adhered to each sand grain. During swing spraying, the atomized binder produces a dynamic impact effect under the action of inertia, which prompts the binder to fill the gaps between the sand grains more deeply, without the need to add additional defoaming agent, thereby reducing material costs and environmental pressures.

[0029] It should be noted that the elastic telescopic member 331 is a prior art, which is composed of a sleeve, a telescopic rod and a spring. One end of the spring set in the sleeve is fixed to one end of the telescopic rod, which limits the movement of the rack 33 and ensures that the annular injection pipe 3 can swing back and forth smoothly.

[0030] Example 4: Reference Figure 4 and Figure 7, which is basically the same as Example 3, and further, the outer wall of the first support shaft 31 is rotatably connected to the inner wall of the mixing tank 1 through a bearing, a delivery pipe 5 is installed inside the first support shaft 31, one end of the delivery pipe 5 is connected to the annular injection pipe 3, and a rotary joint 51 is installed at the other end of the delivery pipe 5. One end of the first support shaft 31 passes through the mixing tank 1 and extends to the outside. The vibrating member includes a movable block 43 fixed at one end of a T-shaped rod 41, and the movable block 43 is slidably connected in the gas collecting cylinder 42. One end of the gas collecting cylinder 42 is fixedly installed on the inner wall of the mixing tank 1, and one end of the movable block 43 is fixedly connected to a striking rod 44. One end of the striking rod 44 An impact block 46 is installed on the inner wall of the air collecting cylinder 42, a return spring 45 is fixedly connected between the inner wall of the air collecting cylinder 42 and the movable block 43, one end of the air collecting cylinder 42 is fixedly connected to an air intake pipe 47, one end of the air intake pipe 47 passes through the mixing tank 1 and extends to the outside, a one-way valve is arranged on the air intake pipe 47, one end of the air collecting cylinder 42 is located on one side of the air intake pipe 47 and is connected to an air outlet pipe 48, one end of the air outlet pipe 48 passes through the mixing tank 1 and is fixedly connected to an injection pipe 49, the injection pipe 49 is fixedly installed on the inner wall of the mixing tank 1, and an injection head 491 is installed on the surface of the injection pipe 49, and two adjacent injection heads 491 are arranged in a staggered manner.

[0031] In combination with the above scheme, when the annular injection pipe 3 swings back and forth, the annular injection pipe 3 swings and contacts the arc surface on one side of the T-shaped rod 41, exerting a force on the T-shaped rod 41, so that the impact rod 44 hits the impact block 46, so that the mixing tank 1 vibrates, so that the material adhering to the inner wall of the mixing tank 1 can be vibrated away to avoid that some agglomerated materials cannot be fully mixed and stirred, affecting the mixing effect of the materials, and after the materials are mixed, they are discharged from the discharge port 12, and the material is prevented from remaining in the mixing tank 1 by vibration, and the discharge is cleaner. Different from the prior art, in this scheme, when the T-shaped rod 41 drives the movable block 43 to slide back and forth inside the gas collecting cylinder 42, it can also generate knocking vibration while External air is drawn in through the suction pipe 47, and then through the thrust of the movable block 43, it is transported to the nozzle 491 through the outlet pipe 48 for spraying. Since the multiple nozzles 491 are arranged in a staggered manner, on the one hand, the airflow blowing to the inner wall of the mixing tank 1 can improve the effect of removing sticky materials on the inner wall of the mixing tank 1, and on the other hand, part of the airflow can be directed to the internal material to avoid the stirring element from generating a large amount of heat for mixing the materials. The air blowing has a certain auxiliary cooling effect, reduces the influence of the high heat generated by the long-term stirring of the equipment on the bonding of the binder to the molding sand, and improves the overall stability of the equipment. In addition, the setting of the nozzle 491 can form a certain air curtain barrier, reduce the investment in dust equipment, and has a certain dust suppression effect.

[0032] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. A precision-molded automobile parts casting device, comprising a mixing tank (1), wherein a feed port (11) is arranged at the top of the mixing tank (1), a discharge port (12) is installed at the bottom of the mixing tank (1), and a valve (13) is arranged on the discharge port (12), characterized in that: Also includes: A disturbance member having a double helix structure and symmetrically distributed is arranged in the mixing tank (1) and is used to turn up the material near the bottom of the outer wall of the mixing tank (1) and recirculate it to the bottom; One end of the disturbance member is connected to a driving member (2), and the driving member (2) is embedded and installed on the top inner wall of the mixing tank (1); A T-shaped rod (41) is arranged on one side of the inner wall of the mixing tank (1), and a vibrating member is installed on one side of the T-shaped rod (41); The swingable annular spray pipe (3) is located directly below the feed port (11) and is arranged in the mixing tank (1), and is used to initially spray the binder onto the surface of the molding sand. When the annular spray pipe (3) is driven by the driving member (2) to produce reciprocating swing, it is used to drive the T-shaped rod (41) to move so that the mixing tank (1) vibrates.

2. A precision-molded automobile parts casting device according to claim 1, characterized in that: The driving member (2) comprises a driving portion (21) mounted on the inner wall of the top of the mixing tank (1); an output end of the driving portion (21) is fixedly connected to a connecting shaft (22); an end of the connecting shaft (22) is fixedly connected to a worm (23); and the stirring member is fixedly connected to the worm (23).

3. A precision-molded automobile parts casting device according to claim 2, characterized in that: The stirring member comprises a first spiral member (24) fixed to one end of a worm (23); a driving gear (25) is fixedly mounted on one end surface of the first spiral member (24); a fixing plate (28) is fixed to the surface of the first spiral member (24); the bottom of the fixing plate (28) is located on both sides of the first spiral member (24) and is rotatably connected to a second spiral member (27) via a bearing; and the surface of the second spiral member (27) is transmission-connected to the driving gear (25) via a synchronous belt.

4. A precision-molded automobile parts casting device according to claim 3, characterized in that: A worm wheel (37) is meshed and driven on the surface of the worm gear (23); a second support shaft (36) is fixedly connected to the axis of the worm wheel (37); one end of the second support shaft (36) is rotatably connected to the inner wall of the mixing tank (1) via a bearing; one end of the second support shaft (36) is located on one side of the worm wheel (37) and is fixedly connected to a cam (35); a pusher is provided on one side of the cam (35).

5. A precision-molded automobile parts casting device according to claim 4, characterized in that: The pusher comprises a limit plate (34) arranged on one side of the cam (35); one end of the limit plate (34) is fixedly connected to a rack (33); one end of the rack (33) is meshed with a meshing gear (32); a first support shaft (31) is fixed at the axis of the meshing gear (32); one end of the first support shaft (31) is fixedly connected to the annular injection pipe (3); one end of the rack (33) is fixedly connected to an elastic telescopic member (331); and an end of the elastic telescopic member (331) is fixedly connected to the inner wall of the mixing tank (1).

6. A precision-molded automobile parts casting device according to claim 5, characterized in that: The outer wall of the first support shaft (31) is rotatably connected to the inner wall of the mixing tank (1) via a bearing, a delivery pipe (5) is installed inside the first support shaft (31), one end of the delivery pipe (5) is connected to the annular injection pipe (3), and a rotary joint (51) is installed at the other end of the delivery pipe (5), and one end of the first support shaft (31) passes through the mixing tank (1) and extends to the outside.

7. A precision-molded automobile parts casting device according to claim 1, characterized in that: The vibrating member comprises a movable block (43) fixed to one end of a T-shaped rod (41); the movable block (43) is slidably connected in a gas collecting cylinder (42); one end of the gas collecting cylinder (42) is fixedly mounted on the inner wall of the mixing tank (1); one end of the movable block (43) is fixedly connected to an impact rod (44); one side of the impact rod (44) is located on the inner wall of the gas collecting cylinder (42) and an impact block (46) is mounted thereon; and a return spring (45) is fixedly connected between the inner wall of the gas collecting cylinder (42) and the movable block (43).

8. A precision-molded automobile parts casting device according to claim 7, characterized in that: One end of the air collecting cylinder (42) is fixedly connected to an air suction pipe (47), one end of the air suction pipe (47) penetrates the mixing tank (1) and extends to the outside, and a one-way valve is provided on the air suction pipe (47).

9. A precision-molded automobile parts casting device according to claim 8, characterized in that: One end of the gas collecting cylinder (42) is located on one side of the air intake pipe (47) and is connected to an air outlet pipe (48). One end of the air outlet pipe (48) passes through the mixing tank (1) and is fixedly connected to an injection pipe (49). The injection pipe (49) is fixedly installed on the inner wall of the mixing tank (1). An injection head (491) is installed on the surface of the injection pipe (49), and two adjacent injection heads (491) are arranged in a staggered manner.

10. A precision-molded automobile parts casting device according to claim 1, characterized in that: A support frame (101) is fixedly mounted on the outer wall of the mixing tank (1), a support leg is provided at the bottom of the support frame (101), and a vibration-damping pad is fixedly connected to the bottom of the support leg.

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