Automatic core ejection mechanism and core shooter thereof

Abstract

The application belongs to the technical field of core shooting machine core ejection device, and particularly relates to an automatic core ejection mechanism and a core shooting machine thereof, which comprises a manipulator and a clamping assembly, the clamping assembly is connected with the manipulator, the clamping assembly is driven to move by the manipulator to clamp the sand core in the movable core box; further comprising a double-stroke driving cylinder and a tray driving assembly; the automatic core ejection mechanism and the core shooting machine change the main body of the demolding movement, and convert the movable sand core demolding mode into the movable core box demolding mode, so that the risk of sand core damage is significantly reduced. Specifically, the piston rod of the double-stroke driving cylinder is retracted twice: the first retraction realizes the separation of the movable core box and the fixed core box, and provides operation space for the clamping assembly; after the clamping assembly clamps the sand core, the second retraction drives the movable core box to continue moving, so that the sand core and the movable core box are stably separated.

Description

Technical Field

[0001] This invention belongs to the technical field of core ejection device for core ejection machines, specifically relating to an automatic core ejection mechanism and its core ejection machine. Background Technology

[0002] Core shooters are key equipment in the foundry industry for producing sand cores. Their working principle involves injecting coated sand into a mold cavity consisting of a fixed core box and a moving core box, where it is heated and solidified to form a sand core. The core extraction process is a crucial step in the core shooter's work cycle, directly affecting the yield and production efficiency of the sand cores. Existing technologies include various vertical parting core shooters and core extraction devices. For example, Chinese patent CN104668482A discloses a vertical parting core shooter that uses left and right positioning plates to rotate and fix the mold, completing the sand shooting operation; Chinese patent CN119187465A discloses a fully automatic vertical core shooter with front and rear trolley functions, where a rotating mechanism pours the product onto a lift, which is then transferred by a conveyor; and Chinese patent CN221109814U discloses a core extraction device for mold core manufacturing, which uses a multi-joint robotic arm to drive a gripping mechanism into the core shooter to grab the mold core, and is equipped with a scraper assembly and a spray assembly.

[0003] In the aforementioned existing technologies, core removal and demolding commonly employs a robotic arm to directly move the sand core: after mold opening, the robotic arm grips the sand core, extracts it from the moving core box, and removes it. Common robotic arms include six-axis robotic arms and gantry robotic arms. Six-axis robotic arms require extremely high accuracy in gripping position and precise control of posture deviation during movement. Gantry robotic arms, on the other hand, have a long cantilever structure on their Z-axis, and their ends are prone to instability during movement, especially during demolding. Because the sand core has low strength before complete curing, any slight movement deviation or shaking during demolding can cause the sand core to collide with the moving core box, resulting in edge damage or overall cracking and thus producing defective products. Furthermore, in existing technologies, the palletizing process typically requires the robotic arm to carry the sand core a long distance to the pallet position, which not only prolongs the time the sand core is held, increasing the risk of breakage, but also limits the improvement of production efficiency. Summary of the Invention

[0004] To address the aforementioned technical problems, one objective of this invention is to provide an automatic core ejection mechanism that can improve the stability of the sand core during the demolding process and reduce the risk of damage to the sand core; another objective of this invention is to provide a core shooter that includes the aforementioned automatic core ejection mechanism.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: An automatic core extraction mechanism includes a robotic arm and a gripping assembly. The gripping assembly is connected to the robotic arm, and the robotic arm drives the gripping assembly to move and grip sand cores in the moving core box. It also includes a dual-stroke drive cylinder and a tray drive assembly. The piston rod of the double-stroke drive cylinder is connected to the guide plate of the moving core box. The piston rod of the double-stroke drive cylinder retracts twice and extends once. After the piston rod of the double-stroke drive cylinder retracts once and drives the moving core box to move, the ejection mechanism connected to the moving core box pushes the sand core outward. After the clamping assembly clamps the sand core, the piston rod of the double-stroke drive cylinder retracts twice and drives the moving core box to continue moving, so that the sand core is separated from the moving core box. The pallet drive assembly has a pallet on it, and the pallet drive assembly drives the pallet to move horizontally or rotate; so that the area to be placed on the pallet is close to the position where the gripping assembly grips the sand core.

[0006] The clamping assembly includes a clamping frame, a clamping box, and clamping cylinders; the clamping box is rotatably connected to the clamping frame, and a driving assembly is provided between the clamping box and the clamping frame to drive the clamping box to rotate; clamping cylinders are provided on both sides of the clamping box.

[0007] The clamping frame includes a support plate and a connecting crossbar; there are two connecting crossbars, both of which are fixedly connected to the support plate and are spaced apart; each connecting crossbar is connected to two clamping cylinders via a slider; the slider is slidably connected to the connecting crossbar, and the slider is provided with a fixing screw.

[0008] The clamping frame includes a vertical frame and a C-shaped frame, with the vertical frame and the C-shaped frame fixedly connected; the clamping frame is located at the opening of the C-shaped frame and is rotatably connected to the C-shaped frame.

[0009] The drive assembly includes a telescopic cylinder, a rack, and a gear; a rotating shaft that is rotatably connected to the C-shaped frame is fixedly connected to the clamping frame; there is a gap between the clamping frame and one side of the C-shaped frame; the gear is coaxially and fixedly connected to the rotating shaft and located at the gap; the telescopic cylinder is fixedly connected to the C-shaped frame and located at the gap; the piston rod of the telescopic cylinder is fixedly connected to the rack, and the rack and gear mesh with each other.

[0010] The pallet driving assembly includes a moving vehicle, a rotary table, and a positioning component; the rotary table and the positioning component are both mounted on the body of the moving vehicle; the moving vehicle drives the rotary table and the positioning component to move; the positioning component positions the pallet; and the rotary table drives the pallet to rotate.

[0011] The positioning component includes a positioning frame and a positioning control cylinder; the positioning frame is C-shaped, and a support frame is fixedly connected to the body of the mobile vehicle; there are two positioning control cylinders, the cylinder body of the positioning control cylinder is fixedly connected to the support frame, and the piston rod of the positioning control cylinder is fixedly connected to the positioning frame.

[0012] It also includes a pallet splitting device; the pallet splitting device includes a supporting gantry and a supporting lifting mechanism; both sides of the supporting gantry are provided with supporting lifting mechanisms; the supporting lifting mechanism includes a movable plate and a plate assembly; a pair of plate assemblies are provided on the movable plate; the movable plate is slidably connected to the supporting gantry, and a lifting mechanism is provided between the movable plate and the supporting gantry; the plate assembly includes a plate and a plate drive cylinder; a socket is fixedly connected to the movable plate, and the plate is slidably connected to the socket; the cylinder body of the plate drive cylinder is fixedly connected to the movable plate, and the piston rod of the plate drive cylinder is fixedly connected to the plate.

[0013] A core shooting machine includes a core shooting machine body and an automatic core ejection mechanism. The core shooting machine body is a dual-station vertical core shooting machine. The robotic arm is a gantry robotic arm. The pallet drive assembly is located on the front side of the core shooting machine body. The moving core box is slidably connected to the core shooting machine body, and the cylinder body of the dual-stroke drive cylinder is fixedly connected to the core shooting machine body.

[0014] The ejection mechanism includes an ejection rod and an ejection cylinder. The ejection rod is slidably connected to the moving core box. There are at least two ejection rods, which are fixedly connected to each other by a fixing plate. The cylinder body of the ejection cylinder is fixedly connected to the guide plate connected to the moving core box, and the piston rod of the ejection cylinder is fixedly connected to the fixing plate.

[0015] Compared with the prior art, the beneficial effects of this invention are: This automatic core ejection mechanism and core shooter significantly reduces the risk of sand core damage by changing the main body of the demolding motion from a moving sand core demolding method to a moving core box demolding method. Specifically, the piston rod of the dual-stroke drive cylinder retracts in two stages: the first retraction separates the moving core box from the fixed core box, providing operating space for the clamping assembly; after the clamping assembly clamps the sand core, the second retraction drives the moving core box to continue moving, allowing the sand core to separate smoothly from the moving core box.

[0016] Because the moving core box moves along the guide rod of the core shooting machine, the motion is highly accurate and the operation is stable. This can effectively ensure that the sand core and the fixed core box maintain parallel movement during the demolding process, overcoming the problem of sand core collision and damage caused by motion deviation or shaking due to the movement of the robot arm during demolding, and maximizing the integrity of the sand core.

[0017] Meanwhile, the pallet drive assembly moves or rotates the pallet horizontally, causing the area to be placed to actively approach the gripping assembly. This effectively reduces the travel distance of the gripping assembly after clamping the sand core, shortens the clamping time, and improves stacking efficiency. The position of the gripping cylinder in the gripping assembly is adjustable to accommodate the clamping needs of sand cores of different shapes; the rotatable design of the gripping frame enables a smooth transition of the sand core from a vertical to a horizontal position, facilitating stacking.

[0018] The pallet splitting device can automatically replace the pallet, and combined with the guidance of the positioning component, it realizes full automation of the sand core from core extraction to stacking. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of Example 1; Figure 2 yes Figure 1 Top view of the structure shown; Figure 3 These are diagrams illustrating the existing demolding process and the demolding process of this device in Example 1; Figure 4 This is a schematic diagram of the control principle of a dual-stroke drive cylinder; Figure 5 This is a schematic diagram of the clamping component in Embodiment 1; Figure 6 yes Figure 5 A magnified view of a section at point C; Figure 7 yes Figure 1 A magnified view of a section at point A in the middle; Figure 8 yes Figure 1 A magnified view of a section at point B in the middle; Figure 9 This is a schematic diagram of the overall structure of Example 2; Figure 10 This is a cross-sectional view of a portion of the structure in Example 2; Figure 11 yes Figure 1 A magnified view of a section at point D; Wherein: 1 is the robotic arm, 2 is the gripping assembly, 20 is the gripping frame, 200 is the vertical frame, 201 is the C-shaped frame, 21 is the gripping frame, 210 is the support plate, 211 is the connecting crossbar, 22 is the gripping cylinder, 23 is the drive assembly, 230 is the telescopic cylinder, 231 is the rack, 232 is the gear, 234 is the rotating shaft, 24 is the slider, 25 is the fixing set screw, 3 is the double-stroke drive cylinder, 4 is the pallet drive assembly, 40 is the moving cart, 41 is the rotary table, 42 is the positioning assembly, 420 is the positioning frame, 4 21 is the support frame, 422 is the positioning control cylinder, 5 is the moving core box, 50 is the guide plate, 6 is the fixed core box, 7 is the ejection mechanism, 70 is the ejection rod, 71 is the ejection cylinder, 72 is the fixing plate, 8 is the tray, 9 is the tray splitting device, 90 is the support gantry, 91 is the support lifting mechanism, 92 is the movable plate, 93 is the insertion plate assembly, 930 is the insertion plate, 931 is the insertion plate drive cylinder, 94 is the lifting mechanism, 95 is the socket, 10 is the core shooting machine body, 11 is the second solenoid valve, and 12 is the first solenoid valve. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Example 1

[0022] like Figures 1 to 8 As shown, an automatic core extraction mechanism includes a robotic arm 1 and a gripping component 2. The gripping component 2 is connected to the robotic arm 1, and the robotic arm 1 drives the gripping component 2 to move and grip the sand core in the moving core box 5.

[0023] It also includes a double-stroke drive cylinder 3 and a tray drive assembly 4; the piston rod of the double-stroke drive cylinder 3 is connected to the guide plate 50 of the moving core box 5, and the movement of the moving core box 5 is achieved by the extension and retraction of the piston rod of the double-stroke drive cylinder 3. After the piston rod of the double-stroke drive cylinder 3 extends, the moving core box 5 moves towards the fixed core box 6 to achieve mold closing; after the piston rod of the double-stroke drive cylinder 3 retracts, the moving core box 5 moves away from the fixed core box 6 to achieve mold opening.

[0024] like Figure 3 As shown in part a, in the prior art, a single-stroke cylinder or hydraulic cylinder is usually used; the mold is opened by one retraction; after the mold is opened, the sand core is held by the robot arm 1 and moved away from the moving core box 5. During the movement, it is necessary to ensure that it is parallel to the moving core box 5 so as to ensure that the sand core will not be tilted and collide with the moving core box 5 during the separation process, thus avoiding damage.

[0025] Common robotic arms include six-axis robotic arms and gantry robotic arms. The aforementioned operations rely on a six-axis robotic arm, which places high demands on the accuracy of its gripping position and the minimization of its posture during movement. The Z-axis arm of a gantry robotic arm is a relatively long cantilever, with the gripping device located at the end of the cantilever. This can lead to unstable operation, especially during demolding.

[0026] The piston rod of the double-stroke drive cylinder 3 of this device retracts twice and extends once. When the piston rod of the double-stroke drive cylinder 3 retracts once and drives the moving core box 5 to move, the purpose of this stroke is to increase the distance between the moving core box 5 and the fixed core box 6, so as to realize the separation of the moving core box 5 and the fixed core box 6. The distance between the two can accommodate the gripping component 2 at the end of the robot arm 1.

[0027] Taking a cylinder as an example, its control is well known to those skilled in the art, so it will be briefly described here; a double-stroke cylinder is connected to two solenoid valves, namely the first solenoid valve 12 and the second solenoid valve 11. When both the first solenoid valve 12 and the second solenoid valve 11 are energized, the piston rod is fully extended; when the first solenoid valve 12 is energized and the second solenoid valve 11 is de-energized, the piston rod retracts one stroke; when both the first solenoid valve 12 and the second solenoid valve 11 are de-energized, the piston rod retracts two strokes, at which point the piston rod is fully retracted.

[0028] After the first retraction, the ejection mechanism 7 connected to the moving core box 5 pushes the sand core outward, but the sand core will not be completely ejected. When the clamping assembly 2 clamps the sand core, the piston rod of the double-stroke drive cylinder 3 retracts for a second stroke and drives the moving core box 5 to continue moving, thus separating the sand core from the moving core box 5. The purpose of the second retraction stroke is to achieve the separation of the sand core from the moving core box 5.

[0029] like Figure 3 As shown in section b, this device changes the main body of the demolding motion (i.e., the demolding logic) from "moving sand core" to "moving core box 5". The moving core box 5 is fixedly connected to the guide plate 50 of the core shooting machine. The guide plate 50 is slidably connected to the guide rod on the core shooting machine. That is, the movement is guided by the guide rod, which can effectively ensure that the sand core and the fixed core box 6 move in parallel during demolding, thus maximizing the integrity of the sand core. This overcomes the damage to the sand core caused by the motion deviation of the robot arm 1 during demolding.

[0030] The pallet drive assembly 4 has a pallet 8. The area of ​​the pallet 8 is divided according to the size of the sand core. For example, if four sand cores can be placed, the pallet 8 is divided into four areas. The purpose of the pallet drive assembly 4 is to drive the pallet 8 to move horizontally or rotate, so that the area to be placed on the pallet 8 is close to the position of the clamping assembly 2 when it clamps the sand core. This effectively reduces the travel distance of the clamping assembly 2 after clamping the sand core, improves stacking efficiency, and also shortens the time the sand core is clamped.

[0031] Taking four areas as an example, specifically A, B, C, and D; first, the sand core is placed in area A (the area to be placed). The drive tray 8 is rotated to bring area A closer to the position where the clamping component 2 would clamp the sand core. After the sand core is placed in area A, the drive tray 8 is rotated again to bring area B (the next area to be placed) closer to the position where the clamping component 2 would clamp the sand core. This process is repeated to stack the sand cores.

[0032] Taking two areas as an example, specifically areas E and F; first, the sand core is placed in area A (the area to be placed). The drive tray 8 is moved to move area A closer to the position where the clamping component 2 was used to clamp the sand core. After the sand core is placed in area A, the drive tray 8 is moved again to move area B (the next area to be placed) closer to the position where the clamping component 2 was used to clamp the sand core. This process is repeated to stack the sand cores.

[0033] Furthermore, the clamping assembly 2 includes a clamping frame 20, a clamping frame 21, and clamping cylinders 22; the clamping frame 21 is rotatably connected to the clamping frame 20. This clamping assembly 2 is mainly designed for vertical core shooting machines. A drive assembly 23 is provided between the clamping frame 21 and the clamping frame 20. By driving the clamping frame 21 to rotate through the drive assembly 23, the vertical state during clamping can be changed to the horizontal state during stacking. Clamping cylinders 22 are provided on both sides of the clamping frame 21 to clamp the sand cores. Pressure sensors or similar devices can be installed at the clamping cylinders 22 to determine whether the sand cores are being clamped.

[0034] Furthermore, the clamping frame 21 includes a support plate 210 and a connecting crossbar 211; there are two connecting crossbars 211, both of which are fixedly connected to the support plate 210 with a gap between them, and can be connected by bolts.

[0035] Each connecting crossbar 211 is connected to two clamping cylinders 22 via a slider 24. The slider 24 is slidably connected to the connecting crossbar 211, and the slider 24 is equipped with a fixing screw 25, the end of which can pass through the slider 24 and abut against the connecting crossbar 211. The cylinder body of the clamping cylinder 22 is fixedly connected to the slider 24, and the position of the slider 24 can be adjusted according to the shape of the sand core, thereby changing the clamping position of the clamping cylinder 22. Specifically, the clamping cylinder 22 can be a three-axis cylinder; four clamping cylinders 22 are used to clamp the sand core.

[0036] Furthermore, the clamping frame 20 includes a vertical frame 200 and a C-shaped frame 201, with the vertical frame 200 fixedly connected to the C-shaped frame 201; the clamping frame 21 is located at the opening of the C-shaped frame 201 and is rotatably connected to the C-shaped frame 201. This can reduce the thickness of the clamping frame 21 and the C-shaped frame 201 in the vertical state, reducing the possibility of collisions with the core box 6, the sand core, and the moving core box 5.

[0037] Furthermore, the drive assembly 23 includes a telescopic cylinder 230, a rack 231, and a gear 232; a rotating shaft 234, which is rotatably connected to the C-shaped frame 201, is fixedly connected to the clamping frame 21; there is a gap between the clamping frame 21 and one side of the C-shaped frame 201, and the gear 232 is coaxially fixedly connected to the rotating shaft 234 and located at the gap; the telescopic cylinder 230 is fixedly connected to the C-shaped frame 201 and located at the gap; the piston rod of the telescopic cylinder 230 is fixedly connected to the rack 231, and the rack 231 meshes with the gear 232. The extension and retraction of the piston rod of the telescopic cylinder 230 drives the rack 231 to move, and the movement of the rack 231 drives the gear 232, the rotating shaft 234, and the clamping frame 21 to rotate, changing the horizontal / vertical state of the clamping frame 21.

[0038] The purpose of setting the above interval is to accommodate the drive component 23 and further reduce the thickness in the vertical state.

[0039] Furthermore, the pallet drive assembly 4 includes a moving vehicle 40, a rotary table 41, and a positioning assembly 42; the moving vehicle 40 can specifically be a rail moving vehicle 40, with a track on the ground to cooperate with it; the moving vehicle 40 is equipped with a braking assembly to limit the movement of the moving vehicle 40.

[0040] Both the turntable 41 and the positioning component 42 are mounted on the body of the moving vehicle 40. The moving vehicle 40 drives the turntable 41 and the positioning component 42 to move, thereby changing their overall position. The positioning component 42 positions the pallet 8, ensuring that the pallet 8 is placed in the center of the turntable 41. The purpose of the turntable 41 is to rotate the pallet 8.

[0041] Taking pallet 8 as an example, pallet 8 can be transported to turntable 41 by forklift or pallet 8 conveyor. During the transport process, the position of pallet 8 is positioned by positioning component 42.

[0042] During the palletizing process, if it is necessary to change the position of the area to be placed by rotation, the pallet 8 can be rotated by the turntable 41; if it is necessary to change the position of the area to be placed by translation, the pallet 8 can be moved by the moving cart 40.

[0043] Furthermore, the positioning component 42 includes a positioning frame 420 and a positioning control cylinder 422; the positioning frame 420 is C-shaped, meaning one end is open, and the pallet 8 is positioned by contacting the inner side of the positioning frame 420 through this opening. Specifically, the opening of the positioning frame 420 has a slanted section, which is flared, and can serve as a guide to facilitate the pallet 8 entering the positioning frame 420; the pallet 8 is positioned in the y-direction by the front and rear (y-direction) inner sides of the positioning frame 420, and in the x-direction by the left inner side (x-direction) of the positioning frame 420.

[0044] A support frame 421 is fixedly connected to the body of the mobile vehicle 40. Two positioning control cylinders 422 are provided. The cylinder body of the positioning control cylinder 422 is fixedly connected to the support frame 421, and the piston rod of the positioning control cylinder 422 is fixedly connected to the positioning frame 420. During positioning, the piston rod of the positioning control cylinder 422 extends, causing the positioning frame 420 to be lifted higher than the rotary table 41. After positioning is completed, the piston rod of the positioning control cylinder 422 retracts, causing the positioning frame 420 to fall lower than the rotary table 41, without affecting the rotation of the rotary table 41 and the tray 8.

[0045] Furthermore, it also includes a pallet splitting device 9, which can adopt a structure from the prior art, and can drop the stacked pallets 8 one by one. Specifically, it adopts the following structural configuration: The pallet splitting device 9 includes a support gantry 90 and a support lifting mechanism 91; the support gantry 90 is provided with a support lifting mechanism 91 on both sides, and the function of the support lifting mechanism 91 is to insert into the pallet 8 to lift or lower the pallet 8.

[0046] The support lifting mechanism 91 includes a movable plate 92 and a plate assembly 93; a pair of plate assemblies 93 are provided on the movable plate 92; the movable plate 92 is slidably connected to the support gantry 90, and a lifting mechanism 94 is provided between the movable plate 92 and the support gantry 90. The lifting mechanism 94 can be implemented by a screw and nut lifting mechanism 94.

[0047] The insert plate assembly 93 includes an insert plate 930 and an insert plate drive cylinder 931. A socket 95 is fixedly connected to the movable plate 92, and the insert plate 930 is slidably connected to the socket 95. The cylinder body of the insert plate drive cylinder 931 is fixedly connected to the movable plate 92, and the piston rod of the insert plate drive cylinder 931 is fixedly connected to the insert plate 930. The insert plate 930 is inserted into the tray 8 by retracting the piston rod of the insert plate drive cylinder 931. The structure of the socket 95 prevents the piston rod of the insert plate drive cylinder 931 from being directly stressed when the insert plate 930 is inserted into the tray 8 for lifting or lowering, thereby improving its service life.

[0048] When pallet 8 needs to be replaced, the pallet 8 with sand core is first removed from the turntable 41 by a forklift; then the moving vehicle 40 drives the turntable 41 and the positioning component 42 to move towards the pallet splitting device 9 until the turntable 41 is below the bottom pallet 8 and the left inner side of the positioning frame 420 contacts the left side of the bottom pallet 8 (a sensor can be set on the positioning frame 420), at which point the moving vehicle 40 stops moving.

[0049] Then, the lifting mechanism 94 drives the movable plate 92 and all the trays 8 to move down until the bottom tray 8 is placed on the turntable 41; the piston rod of the insert plate drive cylinder 931 extends to move the insert plate 930 out of the bottom tray 8; the lifting mechanism 94 drives the movable plate 92 to move up until the insert plate 930 is aligned with the upper tray 8, the piston rod of the insert plate drive cylinder 931 retracts to move the insert plate 930 out of the upper tray 8, and the lifting mechanism 94 continues to drive the movable plate 92 to move up, so that the remaining trays 8 move up as a whole and separate from the bottom tray 8.

[0050] Finally, the empty pallet 8 is moved to the front of the core shooting machine by the moving trolley 40; the lifting mechanism 94 continues to drive the movable plate 92 to move down until the bottom pallet 8 contacts the ground. It should be noted that before replacing the pallet 8, the lifting mechanism 94 will first drive the movable plate 92 to move up until the bottom pallet 8 is slightly higher than the upper surface of the rotary table 41.

[0051] Example 2

[0052] A core shooter according to this embodiment includes a core shooter body 10 and an automatic core ejection mechanism as described in Embodiment 1.

[0053] like Figures 9 to 11 As shown, the core shooting machine body 10 is a dual-station vertical core shooting machine in the prior art, which includes two sets of sand shooting mechanisms and molds (fixed core box 6 and moving core box 5). Its structure is well known to those skilled in the art, so it will not be described in detail here. The structure shown in the figure omits the schematic diagram of the sand shooting mechanism.

[0054] The robotic arm 1 is a gantry robotic arm 1. Since it is a dual-station robotic arm, it is equipped with two gantry robotic arms 1, and each of the two gantry robotic arms 1 is equipped with a gripping component 2.

[0055] The tray drive assembly 4 is located on the front side of the core shooting machine body 10; the moving core box 5 is slidably connected to the core shooting machine body 10, and the cylinder body of the double-stroke drive cylinder 3 is fixedly connected to the core shooting machine body 10.

[0056] Furthermore, the ejection mechanism 7 includes an ejection rod 70 and an ejection cylinder 71. The ejection rod 70 passes through the guide plate 50 and is slidably connected to the moving core box 5. There are at least two ejection rods 70, which are fixedly connected to each other by a fixing plate 72. The front end of the ejection rod 70 can contact the sand core inside the moving core box 5.

[0057] The cylinder body of the ejector cylinder 71 is fixedly connected to the guide plate 50 connected to the moving core box 5, and the piston rod of the ejector cylinder 71 is fixedly connected to the fixed plate 72. When the piston rod of the ejector rod 70 retracts, it drives the ejector rod 70 to move and push the sand core outward a certain distance so that the clamping assembly 2 can clamp it.

[0058] The above description only illustrates preferred embodiments of the present invention, but the present invention is not limited to the above embodiments.

Claims

1. An automatic core extraction mechanism, comprising a robotic arm (1) and a gripping assembly (2), wherein the gripping assembly (2) is connected to the robotic arm (1), and the robotic arm (1) drives the gripping assembly (2) to move and grip the sand core in the moving core box (5); characterized in that: It also includes a dual-stroke drive cylinder (3) and a pallet drive assembly (4); The piston rod of the double-stroke drive cylinder (3) is connected to the guide plate (50) of the moving core box (5). The piston rod of the double-stroke drive cylinder (3) retracts twice and extends once. After the piston rod of the double-stroke drive cylinder (3) retracts once and drives the moving core box (5) to move, the ejection mechanism (7) connected to the moving core box (5) pushes the sand core outward. After the clamping assembly (2) clamps the sand core, the piston rod of the double-stroke drive cylinder (3) retracts twice and drives the moving core box (5) to continue moving, so that the sand core is separated from the moving core box (5). The pallet drive assembly (4) is equipped with a pallet (8), and the pallet drive assembly (4) drives the pallet (8) to move horizontally or rotate; so that the area to be placed on the pallet (8) is close to the position of the clamping assembly (2) when clamping the sand core.

2. The automatic core-feeding mechanism according to claim 1, characterized in that: The clamping assembly (2) includes a clamping frame (20), a clamping frame (21), and a clamping cylinder (22); the clamping frame (21) is rotatably connected to the clamping frame (20), and a driving assembly (23) is provided between the clamping frame (21) and the clamping frame (20), and the clamping frame (21) is driven to rotate by the driving assembly (23); clamping cylinders (22) are provided on both sides of the clamping frame (21).

3. The automatic core-feeding mechanism according to claim 2, characterized in that: The clamping frame (21) includes a support plate (210) and a connecting crossbar (211); there are two connecting crossbars (211), both of which are fixedly connected to the support plate (210) and are spaced apart; each connecting crossbar (211) is connected to two clamping cylinders (22) by a slider (24); the slider (24) is slidably connected to the connecting crossbar (211), and the slider (24) is provided with a fixing screw (25).

4. An automatic core-feeding mechanism according to claim 2 or 3, characterized in that: The clamping frame (20) includes a vertical frame (200) and a C-shaped frame (201), with the vertical frame (200) and the C-shaped frame (201) fixedly connected; the clamping frame (21) is located at the opening of the C-shaped frame (201) and is rotatably connected to the C-shaped frame (201).

5. An automatic core-feeding mechanism according to claim 4, characterized in that: The drive assembly (23) includes a telescopic cylinder (230), a rack (231), and a gear (232); a rotating shaft (234) that is rotatably connected to the C-shaped frame (201) is fixedly connected to the clamping frame (21); there is a gap between the clamping frame (21) and one side of the C-shaped frame (201); the gear (232) is coaxially fixedly connected to the rotating shaft (234) and located at the gap; the telescopic cylinder (230) is fixedly connected to the C-shaped frame (201) and located at the gap; the piston rod of the telescopic cylinder (230) is fixedly connected to the rack (231), and the rack (231) meshes with the gear (232).

6. An automatic core-feeding mechanism according to claim 1, characterized in that: The pallet drive assembly (4) includes a moving vehicle (40), a turntable (41), and a positioning assembly (42); the turntable (41) and the positioning assembly (42) are both mounted on the body of the moving vehicle (40); the moving vehicle (40) drives the turntable (41) and the positioning assembly (42) to move; the positioning assembly (42) positions the pallet (8); the turntable (41) drives the pallet (8) to rotate.

7. An automatic core-feeding mechanism according to claim 6, characterized in that: The positioning component (42) includes a positioning frame (420) and a positioning control cylinder (422); the positioning frame (420) is C-shaped, and a support frame (421) is fixedly connected to the body of the moving vehicle (40); there are two positioning control cylinders (422), the cylinder body of the positioning control cylinder (422) is fixedly connected to the support frame (421), and the piston rod of the positioning control cylinder (422) is fixedly connected to the positioning frame (420).

8. An automatic core-feeding mechanism according to claim 6 or 7, characterized in that: It also includes a pallet splitting device (9); the pallet splitting device (9) includes a support gantry (90) and a support lifting mechanism (91); the support gantry (90) is provided with support lifting mechanisms (91) on both sides; the support lifting mechanism (91) includes a movable plate (92) and a plate assembly (93); a pair of plate assemblies (93) are provided on the movable plate (92); the movable plate (92) is slidably connected to the support gantry (90), and a lifting mechanism (94) is provided between the movable plate (92) and the support gantry (90); the plate assembly (93) includes a plate (930) and a plate drive cylinder (931); a socket (95) is fixedly connected to the movable plate (92), and the plate (930) is slidably connected to the socket (95); the cylinder body of the plate drive cylinder (931) is fixedly connected to the movable plate (92), and the piston rod of the plate drive cylinder (931) is fixedly connected to the plate (930).

9. A core shooter, comprising a core shooter body (10) and an automatic core ejection mechanism as described in claim 1, characterized in that: The core shooting machine body (10) is a dual-station vertical core shooting machine; the robot (1) is a gantry robot (1); the tray drive assembly (4) is located on the front side of the core shooting machine body (10); the moving core box (5) is slidably connected to the core shooting machine body (10); and the cylinder body of the dual-stroke drive cylinder (3) is fixedly connected to the core shooting machine body (10).

10. A core shooter according to claim 1, characterized in that: The ejection mechanism (7) includes an ejection rod (70) and an ejection cylinder (71). The ejection rod (70) is slidably connected to the moving core box (5). There are at least two ejection rods (70), which are fixedly connected to each other by a fixing plate (72). The cylinder body of the ejection cylinder (71) is fixedly connected to the guide plate (50) connected to the moving core box (5), and the piston rod of the ejection cylinder (71) is fixedly connected to the fixing plate (72).

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