Precoated sand core shooter for casting wind power castings
By combining the adjustment mechanism and mold frame flipping with the design of push rods and springs, the problem of poor sealing in the coated sand core shooting machine is solved, achieving efficient coated sand cleaning and improved sand core casting quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-12
- Publication Date
- 2026-04-14
AI Technical Summary
In existing coated sand core shooters, the coated sand at the bottom opening of the sand shooting head is difficult to completely clean during the sand shooting process, resulting in poor sealing and affecting casting quality.
By adjusting the position of the rotating part to match the sand injection nozzle, the coating sand is cleaned with good sealing during the sand injection process. Excess coating sand is removed by gravity and mold frame flipping. When pouring sand, the cooperation of ejector rod and spring is used to avoid blockage and reduce demolding damage.
It improves the cleaning efficiency and effect of coated sand, ensures the sealing between the sand injection head and the core box, and ensures the quality of sand core casting.
Smart Images
Figure CN121847729A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of sand core casting equipment technology, and in particular to a coated sand core shooter for wind power casting. Background Technology
[0002] A coated sand core shooter is a sand core casting device that uses compressed air to inject coated sand mixed with resin at high speed into a heated core mold. It is commonly used for casting sand cores for the inner cavities of workpieces such as automobiles, engineering machinery, and wind power castings. Examples include sand cores for forming the center hole of wind turbine main shafts, sand cores for forming mounting holes of bearing seats and pitch bearing rings, etc. Existing coated sand core shooting machines include a flip-up mold frame. During intelligent sand core casting, the mold closing cylinder drives the moving template to move, and the two mold bodies move horizontally to close and form a core box. After the core box is heated, the sand shooting device moves above the core box, and the clamping cylinder actuates to press the sand shooting head against the upper surface of the core box. Then, sand shooting is performed, so that the coated sand forms a high-speed sand stream that is injected into and fills the core box cavity. The core box is kept heated until the coated sand solidifies to form a sand core. Then, the mold frame flips, so that the sand shooting port of the core box faces downwards to pour out the uncured excess coated sand. The mold closing cylinder then drives the opening of the core mold, and the core ejection mechanism ejects the sand core. After the sand core falls into the core receiving carriage, the core receiving carriage exits the core shooting machine, completing the intelligent casting of the sand core.
[0003] However, in existing coated sand core shooting machines, some coated sand inevitably remains on the top surface of the core box at the bottom opening of the sand shooting head during the sand shooting process. This requires cleaning. Using a scraper to remove it, the scraper is usually set on an additional moving component. Due to mold thermal expansion, wear, or installation errors, the height of the scraper and the top surface of the core box is difficult to match, resulting in a gap. It is difficult to completely remove the coated sand, and sand particles are easily left on the top surface of the core box, forming protrusions. This causes the core box and the sand shooting head to not fit tightly during the next mold closing, resulting in a gap and leading to sand leakage during the sand shooting process. Furthermore, it is not easy to remove the coated sand in the tiny depressions caused by wear at the contact part between the sand shooting head and the top of the core box, which affects the quality of sand core casting. Summary of the Invention
[0004] This application proposes a coated sand core shooter for wind power casting, which has the advantages of improving the efficiency and effect of cleaning residual coated sand, and solves the problem that the coated sand remaining on the top of the core box can easily affect the sealing between the sand shooting head and the core box.
[0005] To achieve the above objectives, this application adopts the following technical solution: a coated sand core shooter for wind power casting, comprising a frame, a mold frame rotatably mounted on the top of the frame, two mold bases mounted on the inner side of the mold frame, a core mold fixedly connected to one side of the mold base, a sand shooting port opened on the top of the core mold, a sand shooting head mounted on the top of the frame, a fixed plate mounted between the two mold bases, and a rotating component for closing the corresponding sand shooting port rotatably connected to the top of the fixed plate via a rotating shaft, and also including an adjustment mechanism;
[0006] The adjustment mechanism can drive the rotating part to rotate relative to the core mold, adjust the relative position of the rotating part and the sand injection port, keep the rotating part perpendicular to the parting surface when the sand injection head and the sand injection port cooperate to perform sand injection, switch the position of the rotating part to close the sand injection port before heat preservation and curing, and then perform mold frame flipping operation.
[0007] Furthermore, a drive mechanism is provided on one side of the frame, a mold clamping cylinder is provided on the top of the frame, the output end of the mold clamping cylinder is rotatably connected to the mold base, a sand shooting assembly is provided on the top of the frame, and the fixed plate is fixedly connected to the corresponding single core mold.
[0008] Furthermore, the rotating component includes a rotating rod and a baffle, the baffle is fixedly disposed on one side of the rotating rod, the adjusting mechanism includes an adjusting gear, the rotating rod is coaxially connected to the adjusting gear, a connecting seat is fixedly connected to one side of the top of the mold frame, and an adjusting toothed plate is slidably sleeved on one side of the connecting seat.
[0009] Furthermore, the number of sand-shooting nozzles is set to at least one, the number of baffles is adapted to the number of sand-shooting nozzles, the distance from the corresponding baffle to the axis of the fixed disk is adapted to the distance from the sand-shooting nozzle to the axis of the fixed disk, and the rotating rod is rotatably connected to the fixed disk.
[0010] Furthermore, the adjusting tooth plate and the adjusting gear mesh with each other, an adjusting cylinder is fixedly connected to one side of the connecting seat, the output end of the adjusting cylinder is fixedly connected to the adjusting tooth plate, and the sand-shooting head is inverted "U" shape with the contact end face with the core box as the sand-shooting channel.
[0011] Furthermore, the rotating rod contacts the corresponding core mold and partially contacts the outer wall of the fixed disk, and the rotation range of the rotating rod is adapted to the size of the top surface of the core mold.
[0012] Furthermore, a connecting frame is fixedly connected to the bottom of the frame, and a lifting cylinder is fixedly connected to the middle position of the bottom of the connecting frame. A limit block is fixedly connected to the output end of the lifting cylinder. A connecting plate is provided on the top of the connecting frame, and a top rod is fixedly sleeved on the connecting plate. A spring is fixedly connected to the bottom of the connecting plate, and one end of the spring is fixedly connected to the connecting frame. A guide plate is fixedly connected to one end of the rotating component.
[0013] Furthermore, the number and horizontal position of the top rods are adapted to the number and horizontal position of the sand injection nozzles. The top rods can extend into the sand injection nozzles. The guide plate is inclined and its bottom is at a height higher than the corresponding height of the top surface of the rotating rod. The top rods are slidably connected to the connecting frame. The output rod of the lifting cylinder is movably connected to the connecting plate. The elastic force of the spring is greater than the weight of the sand core.
[0014] Furthermore, the mold base is slidably connected to the mold frame, and the number of mold closing cylinders is set to two.
[0015] The beneficial effects of this invention are as follows:
[0016] This application provides a coated sand core shooter for wind power casting. An adjusting cylinder drives an adjusting gear plate to move horizontally, which, in conjunction with a mold closing cylinder, drives the core mold to move. This, in turn, drives an adjusting gear to move, changing the relative position between the adjusting gear and the adjusting gear plate. During sand shooting, the adjusting gear drives a rotating component to rotate until it aligns with the groove of the sand shooting head, thus opening the sand shooting port and performing sand shooting. After sand shooting, the rotating component's position is adjusted again, causing its baffle to close the corresponding sand shooting port. With the sand shooting port closed, the mold frame is flipped, and the mold frame can reciprocate, using gravity to remove excess coated sand from the top surface of the core box, improving the cleaning effect and ensuring the sealing of the subsequent sand shooting head and core box, thus guaranteeing the intelligent casting quality of the sand core.
[0017] Furthermore, the ejector pin extends into the sand core when the mold frame is in the flipped state and sand is being poured out. Utilizing its elasticity to maintain a stretching tendency while simultaneously coordinating with the mold's slight oscillation, it prevents uncured residual sand from clogging the injection port, thus improving the efficiency of residual sand removal. In addition, the ejector pin provides a horizontal limit. During mold parting, the sand core is demolded, and then the lifting cylinder retracts to lower the sand core height. After the sand core is lowered, the ejector pin's support on the inner wall is removed, allowing for unloading. This demolding process minimizes damage to the outer wall and reduces the sand core's drop height, further preventing damage during demolding and ensuring the casting quality of the sand core. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:
[0019] Figure 1 This is a schematic diagram of the overall structure of this application;
[0020] Figure 2 This is a partial structural diagram of this application;
[0021] Figure 3 This is a schematic diagram of the structure of the shot blasting head in this application;
[0022] Figure 4 This is a schematic diagram of the rotating part in this application;
[0023] Figure 5 For this application Figure 4 Enlarged view of the structure at point A in the image;
[0024] Figure 6 This is a schematic diagram of the structure of the limiting block in this application.
[0025] In the diagram: 1. Frame; 2. Mold frame; 3. Drive mechanism; 4. Mold base; 5. Core mold; 6. Rotating component; 601. Rotating rod; 602. Baffle; 7. Shot injection port; 8. Shot injection head; 9. Shot injection assembly; 10. Connecting seat; 11. Adjusting cylinder; 12. Mold closing cylinder; 13. Guide plate; 14. Fixed plate; 15. Adjusting tooth plate; 16. Adjusting gear; 17. Spring; 18. Connecting frame; 19. Connecting plate; 20. Ejector rod; 21. Limit block; 22. Lifting cylinder. Detailed Implementation
[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0027] Example 1, as Figures 1-5A coated sand core shooter for wind turbine casting includes a frame 1, a mold frame 2 rotatably mounted on the top of the frame 1, and a drive mechanism 3 on one side of the frame 1. The drive mechanism 3 includes a geared motor and a gear and gear ring assembly. The mold frame 2 is sleeved with the gear ring through a hollow shaft. The geared motor can drive the gear ring to rotate through gear transmission, thereby driving the mold frame 2 to rotate. Two mold bases 4 are provided on the inner side of the mold frame 2. A core mold 5 is fixedly connected to one side of the mold base 4. The two core molds 5 can move horizontally and can cooperate to form a core box. The top of the frame 1 is equipped with... A mold clamping cylinder 12 is provided, and the output end of the mold clamping cylinder 12 is rotatably connected to the mold base 4. Specifically, the output rod of the mold clamping cylinder 12 passes through the hollow shaft, so that the mold clamping cylinder 12 can drive the corresponding mold base 4 to move horizontally relative to the frame 1 during the rotation of the mold frame 2 relative to the frame 1. The top of the core mold 5 is provided with a sand injection port 7, and the number of sand injection ports 7 is set to at least one. The top of the frame 1 is provided with a sand injection assembly 9, and the bottom of the sand injection assembly 9 is provided with a sand injection head 8. The sand injection assembly 9 is used to drive the sand injection head 8 to move and cooperate with the sand injection head 8 to perform sand injection operation.
[0028] A fixing plate 14 is provided between the two mold bases 4, and the fixing plate 14 is fixedly connected to the corresponding single core mold 5. (See reference) Figure 5 The top of the fixed disk 14 is rotatably connected to a rotating component 6 via a rotating shaft. Specifically, the rotating component 6 includes a rotating rod 601 and a baffle 602. The number of baffles 602 is adapted to the number of sand injection ports 7, and the distance from the corresponding baffle 602 to the axis of the fixed disk 14 is adapted to the distance from the sand injection port 7 to the axis of the fixed disk 14. The baffle 602 is used to close the corresponding sand injection port. The baffle 602 is fixedly set on the side of the rotating rod 601 near the fixed disk 14 and is integrally formed with the rotating rod 601. The rotating rod 601 is rotatably connected to the fixed disk 14, and the baffle 602 is in contact with the core mold 5. The top of the rotating rod 601 is coaxially connected to an adjusting gear 16 via a rotating shaft. The rotation of the adjusting gear 16 can drive the rotating rod 601 to rotate.
[0029] A connecting seat 10 is fixedly connected to one side of the top of the mold frame 2. An adjusting toothed plate 15 is slidably sleeved on one side of the connecting seat 10. The adjusting toothed plate 15 can move horizontally relative to the connecting seat 10. The adjusting toothed plate 15 meshes with the adjusting gear 16. An adjusting cylinder 11 is fixedly connected to one side of the connecting seat 10. The adjusting cylinder 11 is an electric cylinder. The output end of the adjusting cylinder 11 is fixedly connected to the adjusting toothed plate 15. (See reference...) Figure 3 The sand-shooting head 8 is shaped like an inverted "U" to form a clearance groove, which avoids interference with the rotating part 6 that is arranged perpendicular to the parting surface of the core box. The contact end face between the sand-shooting head 8 and the core box is a sand-shooting channel, which is used to fill the cavity of the core box with coated sand using airflow.
[0030] During operation, the mold closing cylinder 12 drives the corresponding mold base 4 to move horizontally, and the mold base 4 drives the core mold 5 to move, so that the two core molds 5 close together to complete the mold closing and are heated. At this time, the adjusting cylinder 11 adjusts the relative position of the adjusting tooth plate 15 and the adjusting gear 16, so that the adjusting gear 16 drives the rotating part 6 to rotate to a state perpendicular to the parting surface of the core box. The sand shooting assembly 9 adjusts the position of the sand shooting head 8, so that the sand shooting head 8 is pressed against the top surface of the core box and performs sand shooting, so that the coated sand forms a high-speed sand flow that is injected into and fills the core box cavity.
[0031] After the sand-shooting operation is completed, the sand-shooting head 8 is moved away. At this time, the adjusting cylinder 11 extends, driving the adjusting tooth plate 15 to move. The movement of the adjusting tooth plate 15 drives the adjusting gear 16 to rotate until the rotating part 6 is parallel to the core box parting surface. At this time, the baffle 602 rotates to block the top of the corresponding sand-shooting port 7 and closes the sand-shooting port 7. The coated sand solidifies to form a sand core. Then, the driving mechanism 3 drives the mold frame 2 to flip, so that the opening of the core box sand-shooting port faces downward. The baffle 602 restricts the coated sand from flowing out of the sand-shooting port 7, thereby flipping the top and bottom surfaces of the core box and using gravity to remove the coated sand from the top surface of the core box, improving the cleaning effect of excess injected sand on the top surface of the core box. At the same time, it ensures the cleaning effect of the wear pits on the top surface of the core box. As needed, the driving mechanism 3 drives the mold frame 2 to swing within a certain range while keeping the opening of the sand-shooting port 7 facing downward, ensuring the reliability of the coated sand cleaning.
[0032] Next, the coated sand inside the core box solidifies and forms a layered sand core. The regulating cylinder 11 contracts, and the transmission drives the rotating part 6 to rotate and reset, opening the sand injection port 7 to pour out the uncured residual sand inside the sand core. The mold closing cylinder is then driven to open the core mold again, and the sand core is removed, completing the intelligent casting of the sand core.
[0033] Example 2, as Figures 2-5 Based on Embodiment 1, the rotating rod 601 contacts the corresponding core mold 5, and the rotating rod 601 slides in contact with the outer wall of the fixed plate 14. The rotation range of the rotating rod 601 is adapted to the size of the top surface of the core mold 5. During the sand pouring process, the rotating part 6 can be driven to rotate by extending and retracting the adjusting cylinder 11. The rotating rod 601 is used to scrape off excess coated sand. Then, with the top surface of the core box facing down, gravity is used to scrape off the coated sand a second time, further ensuring the cleaning effect of the coated sand.
[0034] Example 3, as Figures 1-6Based on Embodiment 2, a connecting frame 18 is fixedly connected to the bottom of the frame 1. A lifting cylinder 22 is fixedly connected to the middle of the bottom of the connecting frame 18. The lifting cylinder 22 is an electric cylinder, and a limit block 21 is fixedly connected to the output end of the lifting cylinder 22. A connecting plate 19 is provided on the top of the connecting frame 18, and a push rod 20 is fixedly sleeved on the connecting plate 19. The number and horizontal position of the push rods 20 are adapted to the number and horizontal position of the sand injection ports 7, so that the push rods 20 can extend into the corresponding sand injection ports 7 with their openings facing downwards. The diameter of the push rod 20 is smaller than the opening size of the sand injection port 7. For example, when the sand injection port 7 is rectangular, the diameter of the push rod 20 is smaller than the width of the rectangle, so that the push rod 20 can extend into the sand injection port 7. When the sand is inside the sand inlet 7, the uncured residual sand is slidably connected to the top rod 20 and the connecting frame 18. The output rod of the lifting cylinder 22 is movably connected to the connecting plate 19. A spring 17 is fixedly connected to the bottom of the connecting plate 19. One end of the spring 17 is fixedly connected to the connecting frame 18. One end of the rotating part 6 is fixedly connected to the guide plate 13. The guide plate 13 is inclined and its bottom height is higher than the corresponding height of the top surface of the rotating rod 601. The mold base 4 is slidably connected to the mold frame 2. The number of mold closing cylinders 12 is set to two. The elastic force of the spring 17 is greater than the weight of the sand core. The external conveying mechanism is set on one side of the bottom of the frame 1. For example, the core receiving trolley is set on the side of the bottom of the frame 1 near the drive mechanism 3.
[0035] When the mold frame 2 flips, the lifting cylinder 22 remains in a retracted state, and the limit block 21 restricts the connecting plate 19 from moving away from the connecting frame 18. The rotation of the mold frame 2 drives the mold base 4 to rotate, and the mold base 4 drives the connecting seat 10, the core mold 5 and its connecting structure to flip synchronously. The rotation of the core mold 5 drives the fixed plate 14 to rotate, and the rotation of the fixed plate 14 drives the rotating rod 601 to rotate, thereby driving the guide plate 13 to rotate to the bottom of the frame 1. At this time, the height of the guide plate 13 is lower than the height of the baffle 602 due to the flipping.
[0036] During sand pouring, the mold frame 2 drives the core mold to flip to a top-down position. The adjusting cylinder 11 drives the rotating part 6 to rotate. The rotating part 6 rotates to a position perpendicular to the parting surface of the core box, opening the sand injection port 7 and simultaneously moving the guide plate 13 to the side of the connecting plate 19 near the drive mechanism 3. Then, the lifting cylinder 22 extends and drives the limiting block 21 to move upward. The spring 17 pushes the connecting plate 19 to move away from the connecting frame 18. The connecting plate 19 drives the corresponding ejector rod 20 to rise. At this time, the rotating part 6 is located between two adjacent ejector rods 20 until the ejector rod 20 extends into the corresponding sand injection port. The drive mechanism 3 drives the mold frame 2 to swing slowly within a small range, so that the core mold swings slightly relative to the ejector rod 20. With the spring force, the ejector rod 20 tends to extend into the inside of the sand core, clearing the sand injection port, avoiding blockage of the sand injection port during the sand pouring process and increasing the sand pouring rate.
[0037] During mold separation, the two mold closing cylinders 12 drive the corresponding mold bases 4 to move away from each other, and the core mold 5 separates. Since the ejector rod 20 is located inside the sand core and performs horizontal limiting, the sand core is kept in place to complete demolding. At the same time, the spring 17 remains in an extended state, so that the ejector rod 20 cooperates to support the inner wall of the sand core, thereby avoiding damage to the outer wall of the sand core when the demolding force is large when demolding by lifting the outer wall of the sand core.
[0038] Next, the lifting cylinder 22 retracts, causing the limiting block 21 to move closer to the connecting frame 18. The limiting block 21 causes the connecting plate 19 to move against the elastic force of the spring 17, thereby causing the corresponding ejector rod 20 to move and descend, reducing the top height of the ejector rod 20. At the same time, as the mold bases 4 move away from each other, the adjusting cylinder 11 retracts synchronously, keeping the position of the adjusting tooth plate 15 and the relative position of the adjusting gear 16 unchanged, so that the rotating part 6 remains perpendicular to the parting surface and moves synchronously with the core mold 5 until the guide plate 13 is at the bottom of the sand core. At this time, the guide plate 13 is at the top of the limiting block 21. The adjusting cylinder 11 continues to retract, causing the sand core to descend and rest on the top of the guide plate 13, and causing the ejector rod 20 to disengage from the inner side of the sand core, removing the support for the sand core. The sand core falls onto the external conveying mechanism on the inclined surface, thereby completing the demolding of the sand core while reducing its height, further avoiding damage during demolding of the sand core and improving the intelligent casting quality of the sand core.
[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A coated sand core shooter for casting wind turbine castings, comprising a frame (1), a mold frame (2) rotatably mounted on the top of the frame (1), two mold bases (4) mounted on the inner side of the mold frame (2), a core mold (5) fixedly connected to one side of the mold base (4), a sand shooting port (7) opened on the top of the core mold (5), and a sand shooting head (8) mounted on the top of the frame (1), characterized in that, A fixed plate (14) is provided between the two mold bases (4). The top of the fixed plate (14) is rotatably connected to a rotating part (6) for closing the corresponding sand injection port via a rotating shaft, and also includes an adjustment mechanism. The adjustment mechanism can drive the rotating part to rotate relative to the core mold (5), adjust the relative position of the rotating part (6) and the sand injection port (7), and keep the rotating part (6) perpendicular to the parting surface when the sand injection head (8) and the sand injection port (7) cooperate to perform sand injection. Before heat preservation and curing, switch the position of the rotating part (6) to close the sand injection port (7), and then perform mold frame flipping operation.
2. The coated sand core shooter for wind power casting according to claim 1, characterized in that, A drive mechanism (3) is provided on one side of the frame (1), a mold closing cylinder (12) is provided on the top of the frame (1), the output end of the mold closing cylinder (12) is rotatably connected to the mold base (4), a sand shooting assembly (9) is provided on the top of the frame (1), and the fixed plate (14) is fixedly connected to the corresponding single core mold (5).
3. The coated sand core shooter for wind power casting according to claim 1, characterized in that, The rotating component (6) includes a rotating rod (601) and a baffle (602). The baffle (602) is fixedly disposed on one side of the rotating rod (601). The adjusting mechanism includes an adjusting gear (16). The rotating rod (601) is coaxially connected to the adjusting gear (16). A connecting seat (10) is fixedly connected to one side of the top of the mold frame (2). An adjusting toothed plate (15) is slidably sleeved on one side of the connecting seat (10).
4. A coated sand core shooter for wind power casting according to claim 3, characterized in that, The number of the sand-shooting nozzles (7) is set to at least one, the number of baffles (602) is adapted to the number of sand-shooting nozzles (7), the distance from the corresponding baffle (602) to the axis of the fixed disk (14) is adapted to the distance from the sand-shooting nozzle (7) to the axis of the fixed disk (14), and the rotating rod (601) is rotatably connected to the fixed disk (14).
5. A coated sand core shooter for wind power casting according to claim 3, characterized in that, The adjusting tooth plate (15) and the adjusting gear (16) mesh with each other. An adjusting cylinder (11) is fixedly connected to one side of the connecting seat (10). The output end of the adjusting cylinder (11) is fixedly connected to the adjusting tooth plate (15). The sand-shooting head (8) is in the shape of an inverted "U" and the contact end face with the core box is the sand-shooting channel.
6. A coated sand core shooter for wind power casting according to claim 3, characterized in that, The rotating rod (601) contacts the corresponding core mold (5) and partially contacts the outer wall of the fixed disk (14). The rotation range of the rotating rod (601) is adapted to the size of the top surface of the core mold (5).
7. A coated sand core shooter for wind power casting according to claim 5, characterized in that, A connecting frame (18) is fixedly connected to the bottom of the frame (1). A lifting cylinder (22) is fixedly connected to the middle part of the bottom of the connecting frame (18). A limit block (21) is fixedly connected to the output end of the lifting cylinder (22). A connecting plate (19) is provided on the top of the connecting frame (18). A top rod (20) is fixedly sleeved on the connecting plate (19). A spring (17) is fixedly connected to the bottom of the connecting plate (19). One end of the spring (17) is fixedly connected to the connecting frame (18). A guide plate (13) is fixedly connected to one end of the rotating part (6).
8. A coated sand core shooter for wind power casting according to claim 7, characterized in that, The number and horizontal position of the top rods (20) are adapted to the number and horizontal position of the sand injection port (7). The top rods (20) can extend into the sand injection port (7). The guide plate (13) is inclined and its bottom is at a height higher than the corresponding height of the top surface of the rotating rod (601). The top rods (20) are slidably connected to the connecting frame (18). The output rod of the lifting cylinder (22) is movably connected to the connecting plate (19). The elastic force of the spring (17) is greater than the weight of the sand core.
9. A coated sand core shooter for wind power casting according to claim 2, characterized in that, The mold base (4) is slidably connected to the mold frame (2), and the number of the mold closing cylinders (12) is set to two.