Sand outlet mechanism for a core shooter and core shooter

Abstract

The application belongs to the technical field of core shooting machines, and discloses a sand discharging mechanism for a core shooting machine and the core shooting machine. The sand discharging mechanism comprises a rack, a storage cylinder connected to the top of the rack, a sand shooting cylinder connected with a pressure head for shooting sand into a sand box, a sand shooting barrel arranged at the bottom of the rack through a sliding mechanism, a sand shooting head arranged at the bottom of the sand shooting barrel, a sand shooting nozzle connected to the bottom of the sand shooting head through a sand shooting plate, and a limiting mechanism arranged on both sides of the sand shooting barrel and the sand shooting head. When the sand shooting head and the sand shooting nozzle are moved by the lifting mechanism, the sand shooting head and the sand shooting nozzle can move downward along the axis direction of the mounting block and the movable block through the action of the mounting block, the fixing block and the moving structure, the stability of movement is improved, the sand shooting head and the sand shooting nozzle are prevented from swinging when moving downward along with the lifting mechanism, the spraying nozzle is prevented from being shaken and colliding, and the sand shooting effect is affected.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of core shooting machines, and particularly relates to a sand discharging mechanism for a core shooting machine and the core shooting machine. BACKGROUND

[0002] The core shooting machine is a special device for manufacturing sand cores in the casting industry, is divided into hot core box and cold core box types, is suitable for complex mold production, and core manufacturers include enterprises such as Suzhou Mingzhi Technology. Through the synchronous process of sand shooting, compaction and heating solidification, the core shooting machine realizes efficient core making by cooperating with compressed air, can produce high-precision sand cores, and is widely used in the casting field of automobile parts. The sand discharging mechanism of the core shooting machine is used for conveying sand from a sand storage container to a sand shooting cylinder or a core box, and provides sufficient material basis for the subsequent sand shooting process. The sand discharging mechanism is composed of a sand shooting cylinder, an air tank, a sand shooting valve and a sand nozzle. When working, the sand cylinder is pressed on the upper plane of the core box by the pressure cylinder, and the sand shooting valve is opened to shoot sand. After the exhaust sand shooting is completed, the pressure cylinder is loosened to complete the sand shooting and sand adding work.

[0003] In the prior art, the sand shooting mechanism needs to move horizontally and then descend to align the sand shooting nozzle with the sand box for sand shooting. However, the sand shooting nozzle is prone to shaking when moving with the sand discharging mechanism, which causes frequent collision and friction between the sand shooting nozzle and the sand box sand shooting port, resulting in burrs and deformation at the end of the sand shooting nozzle, reducing the service life of the sand shooting nozzle, and further affecting the normal sand shooting and reducing the work efficiency. SUMMARY

[0004] In view of the problems in the prior art, the application provides the following technical scheme: a sand discharging mechanism for a core shooting machine, comprising:

[0005] A rack is connected with a storage cylinder at the top;

[0006] A sand shooting cylinder is connected with a pressure head, and is used for shooting sand into a sand box;

[0007] A sand shooting cylinder is arranged at the bottom of the rack through a sliding mechanism;

[0008] A sand shooting head is arranged at the bottom of the sand shooting cylinder, and the bottom of the sand shooting head is connected with a sand shooting nozzle through a sand shooting plate;

[0009] A limiting mechanism is arranged on both sides of the sand shooting cylinder and the sand shooting head, and the limiting mechanism comprises:

[0010] A mounting block is movably connected with a fixed block at the bottom end;

[0011] A moving structure is arranged in the mounting block and the fixed block, and is used for limiting the movement of the sand shooting head and the sand shooting nozzle.

[0012] As a preferred embodiment of the above technical scheme, the sliding mechanism comprises:

[0013] A first driving member is connected at the top end of the rack;

[0014] A guide rail is arranged on one side of the first driving member;

[0015] A sliding block is connected to one end of the first driving member, and the sand shooting cylinder is arranged on the guide rail through the sliding block.

[0016] As a preferred embodiment of the above technical solution, a lifting mechanism is arranged between the sand shooting cylinder and the sand shooting head, and the lifting mechanism comprises:

[0017] A second driving member is connected to the bottom of the sand shooting cylinder;

[0018] A connecting plate is connected between the second driving member and the moving cylinder, the moving cylinder is connected to the top of the sand shooting head, and the moving cylinder is arranged at the bottom end of the sand shooting head in a sliding manner;

[0019] A connecting rod is connected to both sides of the connecting plate.

[0020] As a preferred embodiment of the above technical solution, the top of the mounting block is slidingly connected to the top end of the rack, the side of the mounting block close to the connecting rod is provided with a movable opening, the connecting rod extends through the movable opening to the inside of the mounting block and is connected to the moving structure, the fixing block is connected to both sides of the bottom end of the sand shooting head, and the fixing block, the mounting block and the connecting rod are symmetrically arranged with the center of the sand shooting cylinder.

[0021] As a preferred embodiment of the above technical solution, a protective structure is arranged outside the sand shooting plate and the sand shooting nozzle, and the protective structure comprises:

[0022] A third driving member is connected to the bottom end of the sand shooting head;

[0023] A protective sleeve is arranged outside the bottom end of the sand shooting nozzle in a sliding manner, and the third driving member is connected to the protective sleeve through the connecting plate;

[0024] A first elastic member is connected between the sand shooting plate and the protective sleeve.

[0025] As a preferred embodiment of the above technical solution, the sand shooting nozzle has a plurality of linear array distribution at the bottom of the sand shooting plate, the protective sleeve has the same number of sand shooting nozzles, the adjacent protective sleeves are connected through the fixing plate, and the third driving member and the connecting plate are located at both ends of the sand shooting plate.

[0026] As a preferred embodiment of the above technical solution, a pressing structure is arranged on the protective sleeve and the sand shooting plate, the pressing structure has the same number of protective structures, and the pressing structure comprises:

[0027] A movable rod is connected to the top of the protective sleeve, and the top of the protective sleeve is connected with a protruding block;

[0028] A pressing plate is connected to the bottom of the sand shooting plate, and the side of the pressing plate is in contact with the outside of the top end of the sand shooting plate;

[0029] A moving rod is connected to one side of the pressing plate.

[0030] The first mounting plate is connected between the sand shooting plate and the moving rod, and a second elastic member is connected between the first mounting plate and the abutting plate.

[0031] As a preferred technical solution of the above, the bottom end of the moving rod is a slope, the protruding block is located at the bottom of the slope, and the abutting plate is made of elastic rubber.

[0032] As a preferred technical solution of the above, the inside bottom end of the sand shooting head is provided with a leakage prevention structure, which comprises:

[0033] The second mounting plate is connected at the top of the sand shooting plate, and two flow guide blocks are connected at the top of the second mounting plate.

[0034] The sand shooting port is arranged at the top of the second mounting plate and corresponds to the sand shooting nozzle.

[0035] The groove is arranged in the inside of the second mounting plate, and the inner wall of the groove is rotatably connected with a baffle.

[0036] The third elastic member is connected between the inner wall of the groove and the bottom of the second mounting plate.

[0037] As a preferred technical solution of the above, the sand shooting mechanism for the core shooter comprises the above.

[0038] The beneficial effects of the present application are:

[0039] (1) When the sand shooting head and the sand shooting nozzle are moved by the lifting mechanism, the installation block, the fixed block and the moving structure ensure that the sand shooting head and the sand shooting nozzle can move downward along the axis direction of the installation block and the movable block, improve the stability of the movement, prevent the sand shooting head and the sand shooting nozzle from swinging when moving downward with the lifting mechanism, and further prevent the spray nozzle from shaking and being impacted, affecting the sand shooting effect.

[0040] (2) The protective structure can protect the bottom end of the sand shooting nozzle and abut and limit the top end of the sand shooting nozzle, thereby preventing the bottom end of the sand shooting nozzle from being deformed by collision and the top end from being broken, and the baffle can collect the sand cores remaining in the sand shooting head, prevent the excess sand cores from falling on the sand shooting plate and the sand box, cause the sand shooting nozzle to be blocked and worn out, shorten the service life, and further improve the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 The figure shows the overall structure of the embodiment;

[0042] Figure 2 The figure shows the structure of the sliding structure, the sand shooting head and the sand shooting nozzle of the embodiment;

[0043] Figure 3 The figure shows the internal structure of the installation block and the movable block of the embodiment;

[0044] Figure 4 A structural diagram of an embodiment mobile structure is shown.

[0045] Figure 5 A structural diagram of an embodiment mobile structure, slider, sand shooting head and sand shooting nozzle is shown.

[0046] Figure 6 A structural diagram of an embodiment sand shooting plate, sand shooting nozzle and protection structure is shown.

[0047] Figure 7 A structural diagram of an embodiment protection sleeve and abutting structure is shown.

[0048] Figure 8 A structural diagram of an embodiment sand shooting head, sand shooting nozzle and leakage prevention structure is shown.

[0049] Figure 9 A structural diagram of an embodiment second mounting plate, sand shooting nozzle and baffle is shown.

[0050] Figure 10 A physical diagram of an embodiment is shown.

[0051] In the figure: 1, frame; 2, sand shooting cylinder; 3, sand shooting head; 4, sand shooting plate; 5, sand shooting nozzle; 6, mounting block; 7, fixed block; 8, first driving member; 9, guide rail; 10, slider; 11, second driving member; 12, connecting plate; 13, mobile cylinder; 14, connecting rod; 15, first toothed plate; 16, gear; 17, second toothed plate; 18, telescopic rod; 19, fourth elastic member; 20, third driving member; 21, protection sleeve; 22, first elastic member; 23, movable rod; 24, protruding block; 25, abutting plate; 26, mobile rod; 27, second elastic member; 28, second mounting plate; 29, flow guide block; 30, recess; 31, baffle; 32, third elastic member. DETAILED DESCRIPTION

[0052] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be described clearly and completely below in conjunction with embodiments.

[0053] The present application provides a sand shooting mechanism for a core shooter and a core shooter, like Figures 1 to 5As shown, including rack 1, storage tank, sand shooting cylinder, pressure head, sand shooting cylinder 2, sliding mechanism, sand shooting plate 4, sand shooting nozzle 5 and limiting mechanism, the top of rack 1 is fixedly connected with a storage tank for storing sand cores, the top of rack 1 is fixedly connected with a sand shooting cylinder, the bottom of the sand shooting cylinder is fixedly connected with a pressure head, the pressure head is located at the top end of the sand shooting cylinder 2 inside, for shooting sand cores into the sand box, the sand shooting cylinder 2 is arranged at the bottom of the rack 1 through the sliding mechanism, the sand shooting cylinder 2 is provided with a sand shooting valve inside, the sand shooting head 3 is arranged at the bottom of the sand shooting cylinder 2, the sand shooting head 3 is fixedly installed with a sand shooting plate 4, the sand shooting plate 4 is fixedly connected with a sand shooting nozzle 5, the limiting mechanism is arranged on both sides of the sand shooting cylinder 2 and the sand shooting head 3, the limiting mechanism includes a mounting block 6, a fixed block 7 and a moving structure, the bottom end of the mounting block 6 is movably connected with the fixed block 7, the moving structure is arranged in the mounting block 6 and the fixed block 7, for limiting the movement of the sand shooting head 3 and the sand shooting nozzle 5.

[0054] The sliding mechanism includes a first driving member 8, a guide rail 9 and a sliding block 10, one end of the first driving member 8 is fixedly connected to the top end of the rack 1, the guide rail 9 is arranged on one side of the first driving member 8, the guide rail 9 is fixedly connected to the top end of the rack 1, the sliding block 10 is fixedly connected to one end of the first driving member 8, the sliding block 10 is fixedly connected to the top end of the sand shooting cylinder 2, the sand shooting cylinder 2 is slidably arranged on the guide rail 9 through the sliding block 10.

[0055] In this embodiment, the first driving member 8 can be an electric push rod, which transports sand cores into the storage tank, in the initial state, the sand shooting cylinder 2 and the sand shooting head 3 are located at the bottom of the storage tank, the sand cores in the storage tank are transported into the sand shooting cylinder 2, then the first driving member 8 is started to push the sliding block 10 to move along the guide rail 9, so that the sliding block 10 drives the sand shooting cylinder 2, the sand shooting head 3 and the limiting mechanism to move to the bottom of the sand shooting cylinder, the sand shooting head 3 drives the sand shooting plate 4 and the sand shooting nozzle 5 to move downward through the lifting mechanism, so that the sand shooting nozzle 5 is aligned with the sand shooting hole on the sand box and the one end of the sand shooting nozzle 5 is inserted into the sand shooting hole, the sand shooting valve is opened, the sand shooting cylinder is started, the high-pressure gas blown through the sand shooting nozzle 5 shoots the sand cores from the sand shooting cylinder 2 and the sand shooting head 3 into the sand box to precompact, when the sand cores fill the sand box, the sand shooting pressure is maintained for 1-3 seconds (pressure maintaining time), the sand cores are further compacted by using the continuous air pressure to improve the compactness of the sand cores.

[0056] As Figures 1 to 5As shown, in order to enable the sand nozzle 5 to be inserted into the inside of the sand box accurately, the sand box is sand blasted, and the sand blasting cylinder 2 and the sand blasting head 3 are provided with a lifting mechanism. The lifting mechanism comprises a second driving piece 11, a connecting plate 12, a moving cylinder 13 and a connecting rod 14. The second driving piece 11 is fixedly connected to the bottom of the sand blasting cylinder 2. The connecting plate 12 is fixedly connected to the bottom of the second driving piece 11 and the top end of the moving cylinder 13. The bottom of the moving cylinder 13 is fixedly connected to the top of the sand blasting head 3. The moving cylinder 13 is slidingly connected to the outside of the bottom end of the sand blasting head 3. The connecting rod 14 is fixedly connected to the two sides of the connecting plate 12. The top of the mounting block 6 is slidingly connected to the top end of the rack 1. The side close to the connecting rod 14 of the mounting block 6 is provided with a movable opening. The connecting rod 14 extends to the inside of the mounting block 6 through the movable opening and is connected to the moving structure. The connecting rod 14 can drive the moving structure to move downward through the movable opening. The fixed block 7 is connected to the two sides of the bottom end of the sand blasting head 3. The fixed block 7, the mounting block 6 and the connecting rod 14 are symmetrically arranged with the center of the sand blasting cylinder 2. The stability of the movement of the sand blasting head 3 and the sand nozzle 5 is improved.

[0057] The moving structure comprises a first toothed plate 15, a gear 16, a rotating rod, a second toothed plate 17, an extension rod 18 and a fourth elastic piece 19. One side of the first toothed plate 15 is fixedly connected with the connecting rod 14, and the other side is engaged with the gear 16. The gear 16 is fixedly connected with the rotating rod in the middle. The two ends of the rotating rod are rotatably connected with the inner wall of the mounting block 6. One side of the gear 16 is engaged with the second toothed plate 17. The top of the second toothed plate 17 is fixedly connected with the extension rod 18. The outside of the extension rod 18 is sleeved with the fourth elastic piece 19. One end of the fourth elastic piece 19 is fixedly connected with the top inner wall of the mounting block 6. The first toothed plate 15 and the second toothed plate 17 are slidingly connected with the inner wall of the mounting block 6.

[0058] In the embodiment, the second driving piece 11 can be an electric push rod, and the fourth elastic piece 19 can be a compression spring. After the sand blasting cylinder 2 and the sand blasting head 3 move to the bottom of the sand blasting cylinder, the second driving piece 11 is started first to drive the connecting plate 12 and the moving cylinder 13 to move downward. The moving cylinder 13 moves downward along the outside of the bottom end of the sand blasting cylinder 2. One end of the sand nozzle 5 can be inserted into the sand blasting hole of the sand box. When the connecting plate 12 moves, the connecting rod 14 and the first toothed plate 15 move downward. The first toothed plate 15 moves along the inner wall of the mounting block 6 and drives the gear 16 to rotate. The second toothed plate 17 moves upward along the inner wall of the mounting block 6. The extension rod 18 contracts, and the fourth elastic piece 19 is compressed. The extension rod 18 and the fourth elastic piece 19 can abut against the top inner wall of the mounting block 6. The movement of the first toothed plate 15 can guide the movement of the sand blasting head 3 and the sand nozzle 5. The sand blasting head 3 and the sand nozzle 5 are prevented from shaking. After the sand blasting head 3 and the sand nozzle 5 move, the top end of the sand blasting cylinder 2 is limited by the extension rod 18 and the fourth elastic piece 19. The stability of the sand blasting head 3 and the sand nozzle 5 is improved.

[0059] As Figures 5 to 6 shown in FIG. 1, in order to prevent the sand shooting nozzle 5 from being collided, causing damage and deformation, affecting the service life, the sand shooting plate 4 and the outer side of the sand shooting nozzle 5 are provided with a protective structure, the protective structure includes a third driving element 20, a protective sleeve 21 and a first elastic element 22, the third driving element 20 is fixedly connected at the bottom end of the sand shooting head 3, the protective sleeve 21 is slidingly connected at the bottom end of the outer side of the sand shooting nozzle 5, the bottom of the third driving element 20 is fixedly connected with a moving plate, one end of the moving plate is fixedly connected with the protective plate close to both ends of the sand shooting plate 4, the first elastic element 22 is fixedly connected between the sand shooting plate 4 and the protective sleeve 21, the sand shooting nozzle 5 is multiple, and it is linearly arrayed at the bottom of the sand shooting plate 4, the protective sleeve 21 is the same number as the sand shooting nozzle 5, and the adjacent protective sleeves 21 are connected through the fixed plate, and the third driving element 20 and the moving plate are located at both ends of the sand shooting plate 4.

[0060] In this embodiment, the third driving element 20 can be an electric push rod, and the third elastic element 32 can be a compression spring. When it is needed to insert the sand shooting nozzle 5 into the sand shooting hole on the sand box to shoot sand, the third driving element 20 is started to drive the moving plate to move, and through the action of the moving plate and the fixed plate, the multiple protective sleeves 21 are simultaneously moved upward, the protective sleeve 21 moves along the outer wall of the sand shooting nozzle 5 and makes the third elastic element 32 compressed, so that the protective sleeve 21 exposes the bottom end of the sand shooting nozzle 5, thereby enabling the sand shooting nozzle 5 to be inserted into the sand shooting hole of the sand box, preventing the sand shooting head 3 and the sand shooting nozzle 5 from being collided when moving, causing the sand shooting nozzle 5 to be collided and damaged, and thereby improving the service life of the sand shooting nozzle 5.

[0061] As Figures 5 to 7 shown in FIG. 1, in order to improve the stability of the sand shooting nozzle 5 and prevent the sand shooting nozzle 5 from being broken and deformed, the protective sleeve 21 and the sand shooting plate 4 are provided with a abutting structure, the abutting structure is the same number as the protective structure, the abutting structure includes a movable rod 23, a protrusion 24, an abutting plate 25, a moving rod 26, a first mounting plate and a second elastic element 27, the movable rod 23 is fixedly connected at the top of the protective sleeve 21, the top of the protective sleeve 21 is fixedly connected with the protrusion 24, the abutting plate 25 is arranged at the bottom of the sand shooting plate 4, and the top of the abutting plate 25 is slidingly connected with the bottom of the sand shooting plate 4, one side of the abutting plate 25 is in contact with the outer side of the top end of the sand shooting plate 4, the moving rod 26 is fixedly connected on one side of the abutting plate 25, the first mounting plate is slidingly connected at the bottom of the sand shooting plate 4, the bottom of the first mounting plate is fixedly mounted with the top of the moving rod 26, and the first mounting plate and the abutting plate 25 are fixedly connected with the second elastic element 27, the bottom end of the moving rod 26 is a slope, the protrusion 24 is located at the bottom of the slope, and the abutting plate 25 is made of elastic rubber material.

[0062] In the embodiment, the second elastic member can be a compression spring. When the protective sleeve 21 moves upward, the movable rod 23 and the protrusion 24 are driven to move upward. When the protective sleeve 21 completely exposes the bottom end of the sand shooting nozzle 5, the movable rod 23 moves along the inclined surface at the bottom end of the moving rod 26, presses the moving rod 26, and makes the second elastic member 27 compress and press against the abutting plate 25. Thus, the abutting plate 25 can tightly abut against the top end outer wall of the sand shooting nozzle 5, limits both sides of the top end of the sand shooting nozzle 5, improves the stability of the connection between the top end of the sand shooting nozzle 5 and the sand shooting plate 4, prevents the top end of the sand shooting nozzle 5 from being broken, and affects the sand shooting effect.

[0063] As shown in Figures 8 to 9 the sand shooting head 3 is internally provided with a leakage prevention structure. The leakage prevention structure includes a second mounting plate 28, a flow guide block 29, a sand shooting port, a groove 30, a baffle 31, and a third elastic member 32. The second mounting plate 28 is fixedly connected to the top of the sand shooting plate 4. Two flow guide blocks 29 are fixedly connected to the top of the second mounting plate 28. The sand shooting port is arranged on the top of the second mounting plate 28 and corresponds to the sand shooting nozzle 5. The sand shooting port is located between the two flow guide blocks 29. The groove 30 is arranged in the second mounting plate 28. The baffle 31 is rotatably connected to the inner wall of the groove 30 and is located at the bottom of the sand shooting port. The third elastic member 32 is fixedly connected to one end of the inner wall of the groove 30 and the other end of the second mounting plate 28.

[0064] In the embodiment, the third elastic member 32 can be a compression spring. The sand core in the sand shooting cylinder 2 is shot by the sand shooting head 3 through the sand shooting nozzle 5. The flow guide block 29 guides the sand core. When the sand core enters the sand shooting port, the baffle 31 is impacted to rotate. The third elastic member 32 is compressed, and then the sand shooting port is exposed, so that the sand core enters the sand shooting nozzle 5. When the sand shooting is completed, the baffle 31 is driven to rotate to the original position by the third elastic member 32, so that the baffle 31 shields the sand shooting port again. At this time, the residual sand core in the sand shooting head 3 is collected on the baffle 31, so that the residual sand core is prevented from falling on the sand shooting plate 4 and the sand box, which causes the sand shooting nozzle 5 to be blocked and accelerated wear.

[0065] A sand shooting mechanism for a sand shooting machine.

[0066] Working principle:

[0067] As shown in Figures 1 to 10As shown, by conveying the sand core into the inside of the storage tank, the sand shooting cylinder 2 and the sand shooting head 3 are located at the bottom of the storage tank in the initial state, the sand core in the inside of the storage tank is conveyed into the inside of the sand shooting cylinder 2, the first driving member 8 is started, the sliding block 10 is pushed to move along the guide rail 9, so that the sliding block 10 drives the sand shooting cylinder 2, the sand shooting head 3 and the limiting mechanism to move to the bottom of the sand shooting cylinder, after the sand shooting cylinder 2 and the sand shooting head 3 move to the bottom of the sand shooting cylinder, the third driving member 20 is started to drive the protective sleeve 21 to move upward, so that the protective sleeve 21 moves along the outer wall of the sand shooting nozzle 5 and makes the third elastic member 32 compressed, so that the protective sleeve 21 exposes the bottom end of the sand shooting nozzle 5, when the protective sleeve 21 moves upward, the movable rod 23 and the protrusion 24 are driven to move upward, when the protective sleeve 21 completely exposes the bottom end of the sand shooting nozzle 5, the movable rod 23 moves along the inclined surface at the bottom end of the moving rod 26, presses the moving rod 26, so that the second elastic member 27 is compressed and presses the abutting plate 25, so that the abutting plate 25 can tightly abut against the outer wall of the top end of the sand shooting nozzle 5 to limit the both sides of the top end of the sand shooting nozzle 5.

[0068] The second driving member 11 is started again to drive the connecting plate 12 and the moving cylinder 13 to move downward, so that the moving cylinder 13 moves downward along the outer side of the bottom end of the sand shooting cylinder 2, so that one end of the sand shooting nozzle 5 can be inserted into the sand shooting hole of the sand box, and when the connecting plate 12 moves, the connecting rod 14 and the first tooth plate 15 move downward, so that the first tooth plate 15 moves along the inner wall of the mounting block 6 and drives the gear 16 to rotate the rotating rod, and then drives the second tooth plate 17 to move upward along the inner wall of the mounting block 6, so that the telescopic rod 18 is retracted, the fourth elastic member 19 is compressed, so that the telescopic rod 18 and the fourth elastic member 19 can abut against the inner wall of the top of the mounting block 6, and the movement of the first tooth plate 15 can guide the movement of the sand shooting head 3 and the sand shooting nozzle 5, after the sand shooting head 3 and the sand shooting nozzle 5 move, the telescopic rod 18 and the fourth elastic member 19 limit the top end of the sand shooting cylinder 2, so that one end of the sand shooting nozzle 5 is stably inserted into the sand shooting hole, then the sand shooting valve is opened, the sand shooting cylinder is started, the high-pressure gas sprayed through the sand shooting nozzle 5 shoots the sand core into the sand shooting cylinder 2 and the sand shooting head 3, the sand core is guided by the flow guide block 29 in the sand shooting head 3, when the sand core enters the sand shooting hole, impacts the baffle 31, so that the baffle 31 rotates, the third elastic member 32 is compressed, and then the sand shooting hole is exposed, so that the sand core enters the sand shooting nozzle 5 and is shot into the inside of the sand box, when the sand core fills the sand box, the sand shooting pressure is maintained for 1-3 seconds (pressure maintaining time), and the sand core is further compacted by using the continuous air pressure.

[0069] After the sand shooting is completed, the sand shooting head 3 and the sand shooting nozzle 5 are moved to the original position by the lifting mechanism, the baffle 31 is driven to rotate by the action of the third elastic member 32, so that the baffle 31 rotates to the original position to shield the sand shooting hole again, at this time, the residual sand core in the sand shooting head 3 will be collected on the baffle 31.

[0070] The above examples are only used to illustrate the technical solutions of the present application, and not to limit them.

Claims

1. A sand discharge mechanism for a core shooter, characterized in that, include: The frame (1) has a storage cylinder connected to the top; A sand-shooting cylinder, connected to a pressure head, is used to shoot sand into the sand box; The sand-shooting cylinder (2) is mounted at the bottom of the frame (1) via a sliding mechanism; A sand-shooting head (3) is located at the bottom of the sand-shooting cylinder (2), and a sand-shooting nozzle (5) is connected to the bottom of the sand-shooting head (3) via a sand-shooting plate (4). A limiting mechanism is provided on both sides of the sand-shooting cylinder (2) and the sand-shooting head (3), the limiting mechanism comprising: The mounting block (6) has a fixed block (7) movably connected to its bottom end. A movable structure is provided within the mounting block (6) and the fixing block (7) to limit the movement of the sand-shooting head (3) and the sand-shooting nozzle (5); A lifting mechanism is provided between the sand-shooting cylinder (2) and the sand-shooting head (3), the lifting mechanism comprising: The second driving component (11) is connected to the bottom of the sand-shooting cylinder (2); A connecting plate (12) is connected between the second driving member (11) and the moving cylinder (13). The moving cylinder (13) is connected to the top of the sand-shooting head (3) and the moving cylinder (13) is slidably disposed at the bottom end of the sand-shooting cylinder (2). Connecting rod (14) is connected to both sides of the connecting plate (12); The top of the mounting block (6) is slidably connected to the top of the frame (1). The mounting block (6) has an opening on the side near the connecting rod (14). The connecting rod (14) extends through the opening into the interior of the mounting block (6) and connects to the moving structure. The fixing block (7) is connected to both sides of the bottom end of the sand-shooting head (3). The fixing block (7), the mounting block (6), and the connecting rod (14) are symmetrically arranged with respect to the center of the sand-shooting cylinder (2). The outer sides of the sand-shooting plate (4) and the sand-shooting nozzle (5) are provided with protective structures, the protective structures including: The third driving component (20) is connected to the bottom end of the sand-shooting head (3); The protective sleeve (21) is slidably disposed on the outer side of the bottom end of the sand-shooting nozzle (5), and the third driving member (20) is connected to the protective sleeve (21) through the second connecting plate; The first elastic element (22) is connected between the sand-shooting plate (4) and the protective sleeve (21); The movable structure includes a first toothed plate (15), a gear (16), a rotating rod, a second toothed plate (17), a telescopic rod (18), and a fourth elastic element (19). One side of the first toothed plate (15) is fixedly connected to the connecting rod (14), and the other side meshes with the gear (16). The rotating rod is fixedly connected to the middle of the gear (16), and both ends of the rotating rod are rotatably connected to the inner wall of the mounting block (6). One side of the gear (16) meshes with the second toothed plate (17), and the top of the second toothed plate (17) is fixedly connected to the telescopic rod (18). The fourth elastic element (19) is sleeved on the outside of the telescopic rod (18), and one end of the fourth elastic element (19) is fixedly connected to the top inner wall of the mounting block (6). Both the first toothed plate (15) and the second toothed plate (17) are slidably connected to the inner wall of the mounting block (6).

2. The sand discharge mechanism for a core shooter according to claim 1, characterized in that, The sliding mechanism includes: The first drive unit (8) is connected to the top of the frame (1); The guide rail (9) is disposed on one side of the first drive member (8); The slider (10) is connected to one end of the first drive member (8), and the sand-shooting cylinder (2) is slidably mounted on the guide rail (9) via the slider (10).

3. The sand discharge mechanism for a core shooter according to claim 2, characterized in that, There are multiple sand-shooting nozzles (5), and they are arranged in a linear array at the bottom of the sand-shooting plate (4). The number of protective sleeves (21) is the same as that of the sand-shooting nozzles (5). Adjacent protective sleeves (21) are connected by a fixing plate. The third driving member (20) and the connecting plate (12) are located at both ends of the sand-shooting plate (4).

4. The sand discharge mechanism for a core shooter according to claim 3, characterized in that, The protective sleeve (21) and the sand-shooting plate (4) are provided with abutting structures, the number of which is the same as the number of protective structures, and the abutting structures include: A movable rod (23) is connected to the top of the protective sleeve (21), and a protrusion (24) is connected to the top of the protective sleeve (21). A retaining plate (25) is connected to the bottom of the sand-shooting plate (4), and one side of the retaining plate (25) is in contact with the outer side of the top of the sand-shooting plate (4); A movable rod (26) is connected to one side of the abutment plate (25); A first mounting plate is connected between the sand-shooting plate (4) and the moving rod (26), and a second elastic element (27) is connected between the first mounting plate and the abutment plate (25).

5. The sand discharge mechanism for a core shooter according to claim 4, characterized in that, The bottom end of the moving rod (26) is a slope, the protrusion (24) is located at the bottom of the slope, and the abutting plate (25) is made of elastic rubber.

6. A core shooting machine, characterized in that, Includes the sand discharge mechanism for a core shooter as described in claim 5.

Images