Sand outlet mechanism for a core shooter and core shooter

Abstract

The application relates to a sand discharging mechanism for a core shooting machine and the core shooting machine, and relates to the technical field of core shooting machines. The sand discharging mechanism comprises a sand discharging seat, a fixed seat is fixed to the side wall of the sand discharging seat, two sand discharging heads are mounted on the surface of the fixed seat, a cavity is formed in the fixed seat, a guide groove is formed in the inner wall of the cavity, a closing assembly is arranged in the cavity of the fixed seat, an electric telescopic rod is arranged in the sand discharging seat, and a push rod is fixed to the extending end of the electric telescopic rod. After the sand discharging process is completed and before the sand discharging head is lifted to leave the core box, the closing assembly is driven to be closed to block the sand material conveying channel in the sand discharging head, the remaining sand material in the sand discharging head is prevented from entering the core box, the residual sand and the clumps are prevented from falling to the parting surface position of the lower core box in the whole process of lifting and moving the sand discharging head out of the core box, the molding defects such as the flash and the sand eye on the sand core surface are reduced, and the artificial and working hour costs for subsequent sand core trimming are reduced.

Description

Technical Field

[0001] This invention relates to the field of core shooting machine technology, specifically to a sand discharge mechanism for a core shooting machine and a core shooting machine. Background Technology

[0002] The core shooter is a core specialized equipment for producing sand cores in the casting industry. It uses core sand mixtures such as coated sand mixed with thermosetting resin as raw materials. It relies on the high-speed airflow generated by compressed air to inject the sand into the closed core box cavity. After heating or room temperature atomization curing, it quickly forms sand cores with smooth surfaces and precise dimensions. It is widely used in the production and manufacturing of castings such as automotive parts, construction machinery, pumps and valves. The whole machine is mainly composed of column frame, sand shooting device, and mold frame components. The column and crossbeam form the main frame, which is equipped with sand hopper, sand cylinder, control valve and other sand and air supply systems. The sand discharge mechanism of the core shooter is the core unit of the sand supply and sand shooting process. It mainly includes sand storage hopper, sand discharge control valve, sand shooting cylinder, shooting head and sand shooting nozzle. The sand storage hopper stores the core sand raw material. After the sand shooting process is started, compressed air rushes into the sand shooting cylinder, carrying the internal sand to form a high-speed sand flow. After being evenly distributed by the flow channel of the shooting head, it is injected into the core box at high speed from the sand shooting nozzle, and the sand filling and compaction operations are completed simultaneously.

[0003] However, in daily use, existing core shooting machines are affected by long-term continuous operation, fluctuations in sand characteristics, or the conduction of equipment temperature zones. After the sand shooting process is completed, some un-shot core sand may remain in the inner cavity of the sand shooting nozzle. Due to the continuous conduction of heat around the core box, the resin components in the residual sand may gradually solidify and form clumps on the inner wall of the sand shooting nozzle. If not cleaned in time, it can easily cause narrowing of the sand shooting channel or even local blockage. Over time, this may affect the sand shooting flow rate and filling uniformity. At the same time, when the sand shooting head completes the sand shooting action and lifts away from the core box, the residual sand and clumps in the sand shooting nozzle often have a chance to fall to the parting surface of the core box below. If they are not cleaned in time before entering the mold closing and curing process, they may form appearance and dimensional defects such as flash and sand holes on the surface of the final formed sand core, affecting the accuracy and yield of the finished product.

[0004] To address the aforementioned issues, innovative design based on existing methods is urgently needed. Summary of the Invention

[0005] The purpose of this invention is to provide a sand discharge mechanism and a core shooter for a core shooter, so as to solve the problem of sand residue in the inner cavity of the sand shooting nozzle that is prone to clumping as mentioned in the background art. The technical solution of this invention provides a solution that is significantly different from the existing technology, which is too simplistic.

[0006] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, a sand-discharging mechanism for a core shooter is provided, comprising a sand-discharging seat, a fixed seat fixed to the side wall of the sand-discharging seat, two sand-discharging heads mounted on the surface of the fixed seat, a cavity opened inside the fixed seat, a guide groove opened on the inner wall of the cavity, a sealing component disposed inside the cavity of the fixed seat, an electric telescopic rod disposed inside the sand-discharging seat, and a push rod fixed to the extended end of the electric telescopic rod;

[0007] The enclosed assembly includes a second fixed plate that is slidably installed in the cavity of the fixed base. A first fixed plate is slidably installed on the side wall of the second fixed plate. Multiple sliding grooves are opened on the surfaces of both the first and second fixed plates. A sliding block is slidably installed in the sliding groove. A moving block is fixed to the end of the sliding block. An adjusting block is installed on the surface of the moving block.

[0008] It also includes a first rotating disk that is slidably installed in the cavity of the fixed base. A guide block is fixed to the side wall of the first rotating disk. A second rotating disk is slidably installed on the inner wall of the first rotating disk. Multiple adjustment grooves are opened on the surface of both the first and second rotating disks. Multiple extrusion grooves are opened on the side wall of the second rotating disk. A striking component is provided in the extrusion groove.

[0009] Preferably, the guide groove is spirally designed, and the guide block is located inside the guide groove.

[0010] Preferably, the end of the push rod is connected to the second fixed plate, the sliding groove is designed to be inclined, and the first fixed plate is rotatably connected to the first rotating plate.

[0011] Preferably, the adjusting groove is designed to be inclined, and the adjusting block is located inside the adjusting groove.

[0012] Preferably, the inner wall of the sand-shooting head is fixed with a plurality of extrusion blocks corresponding to the extrusion groove, and the two ends of the extrusion blocks are designed to be inclined.

[0013] Preferably, the first rotating disk surface has two push blocks for symmetrical limiting sliding, and the second rotating disk sidewall has two limiting blocks for symmetrical elastic limiting sliding. The sidewalls of the limiting blocks are designed to be inclined, and the ends of the push blocks are in close contact with the sidewalls of the limiting blocks.

[0014] Preferably, the striking assembly includes a striking seat slidably mounted in the extrusion groove, a striking rod slidably mounted at the end of the striking seat, a striking spring provided on the surface of the striking seat, and a return spring provided on the surface of the striking rod.

[0015] Preferably, the striking base is connected to the extrusion groove via a striking spring, and the striking rod is connected to the striking base via a return spring.

[0016] Secondly, the present invention provides a core shooting machine, including a main body, a core box disposed inside the main body, and a sand shooting seat installed inside the main body.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This invention, through the setting of a fixed base, a sand-shooting head, a guide groove, and a sealing component, drives the sealing component to close after the sand-shooting process is completed and before the sand-shooting head is lifted away from the core box, blocking the sand material conveying channel inside the sand-shooting head and preventing the remaining sand material inside the sand-shooting head from entering the core box. At the same time, during the entire process of the sand-shooting head being lifted and moved out of the core box, it avoids residual sand and lumps from falling to the parting surface of the core box below, thereby reducing forming defects such as flash and sand holes on the surface of the sand core from the source and reducing the labor and time costs of subsequent sand core repair.

[0019] 2. This invention, through the setting of a sand-shooting head, extrusion blocks, and a striking component, triggers the striking component by contacting and extruding with the extrusion blocks designed on both sides. After the sand-shooting process, the inner wall of the sand-shooting head is continuously and repeatedly struck. With the high-frequency vibration generated by the striking, the loose residual sand and heat-cured resin clumps attached to the inner wall of the sand-shooting head are efficiently shaken off. This reduces the adhesion and accumulation of sand on the inner wall of the sand-shooting head channel from the source, reduces the probability of narrowing and local blockage of the sand-shooting channel, ensures the uniformity and stability of the sand-shooting flow and the consistency of cavity filling during long-term operation of the equipment, and reduces molding defects such as loose sand cores and insufficient material. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the sand-shooting base and the fixing base of the present invention;

[0022] Figure 3 This is a cross-sectional view of the fixing base of the present invention;

[0023] Figure 4 This is a partial cross-sectional view of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the fixing base and guide groove of the present invention;

[0025] Figure 6 This is a schematic diagram of the disassembled structure of the closed component of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the moving block, sliding block, and adjusting block of the present invention;

[0027] Figure 8 This is a schematic diagram showing the disassembled structure of the first and second rotating disks of the present invention;

[0028] Figure 9 This is a cross-sectional view of the second rotating disk of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure of the striking component of the present invention;

[0030] Figure 11 This is a schematic diagram of the disassembled cross-sectional structure of the striking component of the present invention.

[0031] In the diagram: 1. Main body; 101. Shot-shooting seat; 102. Fixed seat; 103. Shot-shooting head; 104. Guide groove; 105. Extrusion block; 2. Electric telescopic rod; 201. Push rod; 3. First fixed plate; 301. Second fixed plate; 302. Sliding groove; 4. First rotating plate; 401. Guide block; 402. Adjusting groove; 403. Push block; 5. Second rotating plate; 501. Extrusion groove; 502. Limiting block; 6. Moving block; 601. Sliding block; 602. Adjusting block; 7. Striking seat; 701. Striking rod; 702. Striking spring; 703. Return spring. Detailed Implementation

[0032] Please see Figures 1-11 The present invention provides a technical solution: a sand discharge mechanism for a core shooter, including a sand shooting seat 101, a fixed seat 102 fixed to the side wall of the sand shooting seat 101, two sand shooting heads 103 mounted on the surface of the fixed seat 102, a cavity opened in the fixed seat 102, a guide groove 104 opened in the inner wall of the cavity, a sealing component provided in the cavity of the fixed seat 102, an electric telescopic rod 2 provided in the sand shooting seat 101, and a push rod 201 fixed to the extended end of the electric telescopic rod 2;

[0033] The enclosed assembly includes a second fixed plate 301 that is slidably installed in the cavity of the fixed base 102. A first fixed plate 3 is slidably installed on the side wall of the second fixed plate 301. Multiple sliding grooves 302 are opened on the surfaces of the first fixed plate 3 and the second fixed plate 301. A sliding block 601 is slidably installed in the sliding groove 302. A moving block 6 is fixed to the end of the sliding block 601. An adjusting block 602 is installed on the surface of the moving block 6.

[0034] It also includes a first rotating disk 4 that is slidably installed in the cavity of the fixed base 102. A guide block 401 is fixed on the side wall of the first rotating disk 4. A second rotating disk 5 is slidably installed on the inner wall of the first rotating disk 4. Multiple adjustment grooves 402 are opened on the surface of both the first rotating disk 4 and the second rotating disk 5. Multiple extrusion grooves 501 are opened on the side wall of the second rotating disk 5. A striking component is provided in the extrusion groove 501.

[0035] In one embodiment of the present invention, the guide groove 104 is spirally designed, and the guide block 401 is located in the guide groove 104. The extended end of the electric telescopic rod 2 pushes the push rod 201 to move. The push rod 201 pushes the first fixed disk 3 and the first rotating disk 4 to move synchronously. While the guide block 401 follows the displacement of the first rotating disk 4, it rotates relative to the first fixed disk 3 along the guide groove 104.

[0036] In one embodiment of the present invention, the end of the push rod 201 is connected to the second fixed disk 301. The push rod 201 can directly push the second fixed disk 301 to transmit power. The sliding groove 302 is designed with an inclination to guide the movement of the sliding block 601. The first fixed disk 3 is rotatably connected to the first rotating disk 4 to ensure that the first fixed disk 3 and the first rotating disk 4 can move up and down synchronously.

[0037] In one embodiment of the present invention, the adjusting groove 402 is inclined and forms a guiding fit with the sliding groove 302. The adjusting block 602 is located in the adjusting groove 402. When the first rotating disk 4 is deflected by the guide groove 104 and the guide block 401, the adjusting groove 402 and the sliding groove 302 drive multiple moving blocks 6 to move synchronously, thereby closing and sealing the sand channel of the sand-shooting head 103.

[0038] In one embodiment of the present invention, a plurality of extrusion blocks 105 corresponding to the extrusion groove 501 are fixed on the inner wall of the sand-shooting head 103. The two ends of the extrusion blocks 105 are inclined. When the second rotating disk 5 moves in the sand-shooting head 103, the extrusion blocks 105 enter the extrusion groove 501 and push the striking rod 701. The striking rod 701 slides inward under pressure. At the same time, the extrusion reset spring 703 enters the striking seat 7 and pushes the striking seat 7 to extrude the striking spring 702 to slide in the second rotating disk 5. When the extrusion groove 501 moves past the position of the extrusion block 105, the striking rod 701 loses its limit. The reset spring 703 provides reset power to drive the striking rod 701 to reset. Simultaneously, the striking spring 702 pulls the striking seat 7 to quickly rebound and reset. During the movement of the second rotating disk 5, through the periodic extrusion cooperation with the extrusion blocks 105, the striking rod 701 is driven to move back and forth, continuously striking the inner wall of the sand-shooting head 103.

[0039] In one embodiment of the present invention, the surface of the first rotating disk 4 is symmetrically limited by two push blocks 403, and the sidewall of the second rotating disk 5 is symmetrically elastically limited by two limit blocks 502. The sidewall of the limit block 502 is inclined. The end of the push block 403 is close to the sidewall of the limit block 502. When the first rotating disk 4 and the second rotating disk 5 move to the position close to the inner wall of the fixed seat 102, the push block 403 on the surface of the first rotating disk 4 is squeezed inward by the inner wall of the fixed seat 102 and slides inward. The push block 403 is close to the inclined sidewall of the limit block 502. Under the guidance of the inclined surface, the limit block 502 gradually moves inward and enters the interior of the second rotating disk 5, releasing the fixed connection between the first rotating disk 4 and the second rotating disk 5. When the second rotating disk 5 moves back to the position flush with the first rotating disk 4, the elastically slidable limit block 502 extends back into the inner wall of the first rotating disk 4 under its own elastic force, completing the connection between the first rotating disk 4 and the second rotating disk 5.

[0040] In one embodiment of the present invention, the striking assembly includes a striking seat 7 slidably installed in the extrusion groove 501, a striking rod 701 slidably installed at the end of the striking seat 7, a striking spring 702 provided on the surface of the striking seat 7, and a return spring 703 provided on the surface of the striking rod 701. When the extrusion groove 501 moves with the second rotating disk 5, the inclined side wall of the extrusion block 105 extrudes the striking rod 701, and the striking rod 701 slides inward to compress the return spring 703 to complete the first stage of energy storage. Simultaneously, it pushes the striking seat 7 to compress the striking spring 702 to complete the second stage of energy storage. When the extrusion groove 501 passes the extrusion block 105, the return spring 703 releases its elastic force to push the striking rod 701 outward to strike the inner wall of the sand-shooting head 103. The striking spring 702 rebounds and drives the striking seat 7 to return to its original position, performing a second vibration to efficiently shake off loose residual sand and dislodge firmly adhered solidified clumps.

[0041] In one embodiment of the present invention, the striking base 7 is connected to the pressing groove 501 via the striking spring 702, and the striking rod 701 is connected to the striking base 7 via the return spring 703.

[0042] A core shooter includes a main body 1, a core box is disposed inside the main body 1, and a sand shooting seat 101 is installed inside the main body 1.

[0043] Working principle: When using the sand-discharging mechanism for the core shooter, the sand-shooting process is first initiated. The sand-shooting seat 101 drives the fixed seat 102 and the sand-shooting head 103 to approach the core box located inside the main body 1, and the sand-shooting head 103 is inserted deep into the core box. Compressed air rushes into the cavity of the sand-shooting seat 101 at high speed, carrying the internal sand material to form a high-speed sand flow. After being evenly distributed through the diversion channel of the fixed seat 102, it is injected into the core box at high speed from the sand-shooting head 103, simultaneously completing the sand filling and compaction operations. After the sand-shooting process is completed, the sand-shooting head 103 remains temporarily inside the core box. At this time, the electric telescopic rod 2 is activated, and the electric telescopic rod extends and retracts. The extended end of rod 2 pushes the push rod 201 connected to it to move. The push rod 201 abuts against the second fixed plate 301 connected to the end of the push rod. The second fixed plate 301 is slidably connected to the first fixed plate 3, and the first fixed plate 3 is rotatably connected to the first rotating plate 4. At the same time, multiple moving blocks 6 are located between the first fixed plate 3 and the first rotating plate 4. The sliding block 601 and the adjusting block 602 are slidably installed in the sliding groove 302 and the adjusting groove 402, respectively. While the push rod 201 pushes the second fixed plate 301 to move in the sand-shooting head 103, the first fixed plate 3 and the first rotating plate 4 move synchronously.

[0044] The guide block 401, which is fixed to the side wall of the first rotating disk 4, is slidably installed in the spiral-designed guide groove 104 opened in the cavity of the fixed base 102. As the guide block 401 moves with the first rotating disk 4, it rotates relative to the first fixed disk 3 along the guide groove 104. The inclined adjustment groove 402 squeezes the adjustment block 602, which drives the moving block 6 and the sliding block 601 to slide along the sliding groove 302. Multiple moving blocks 6 move closer and retract synchronously, switching from the initial open state to the closed state. At this time, multiple moving blocks 6 are located in the gap between the second fixed disk 301 and the squeezing groove 501, blocking the sand channel.

[0045] When multiple moving blocks 6 are fully retracted and closed, and the first rotating disk 4 and the second rotating disk 5 move to a position close to the inner wall of the fixed seat 102, the push block 403 on the surface of the first rotating disk 4 is pressed inward by the inner wall of the fixed seat 102 and slides inward. The push block 403 is close to the inclined side wall of the limiting block 502. Under the guidance of the inclined surface, the limiting block 502 gradually moves inward and enters the interior of the second rotating disk 5, releasing the fixed connection between the first rotating disk 4 and the second rotating disk 5. At this time, the electric telescopic rod 2 continues to drive the push rod 201 to push the second fixed disk 301. The second fixed disk 301 and the extrusion groove 501 are connected by the sliding block 601 and the adjusting block 602 fixed on the two side walls of the moving block 6 and enter the sand injection head 103 simultaneously and move towards the core box.

[0046] During the movement, the extrusion groove 501 on the side wall of the second rotating disk 5 gradually approaches and contacts the extrusion block 105 fixed on the inner wall of the sand-shooting head 103. The extrusion block 105 is inclined on both sides. As it moves, it smoothly contacts and presses the striking rod 701 located at the position of the extrusion groove 501. The striking rod 701 slides inward under pressure, and at the same time, it pushes the striking seat 7 to press the striking spring 702 to slide within the second rotating disk 5 while the extrusion groove 501 moves past the position of the extrusion block 105. When rod 701 loses its limit, the reset spring 703 provides reset power to drive the striking rod 701 to reset. Simultaneously, the striking spring 702 pulls the striking seat 7 to quickly rebound and reset. During the movement of the second rotating disk 5, through periodic extrusion cooperation with the extrusion block 105, the striking rod 701 is driven to reciprocate, continuously and repeatedly striking the inner wall of the sand-shooting head 103. Relying on the vibration generated by the striking, the residual sand and solidified lumps attached to the inner wall of the sand-shooting head 103 are shaken off, reducing the risk of sand-shooting channel blockage from the source and ensuring long-term stable sand-shooting flow.

[0047] After the sand-shooting head 103 completes the sand-shooting action, lifts up, and completely detaches from the core box, the electric telescopic rod 2 pulls the second fixed plate 301 through the push rod 201 to perform a reset action. The second rotating plate 5 moves back to a position flush with the first rotating plate 4. The elastically slidable limiting block 502 extends back into the inner wall of the first rotating plate 4 under its own elastic force, completing the connection between the first rotating plate 4 and the second rotating plate 5. The sealing component enters the reset process. The guide block 401 moves in the opposite direction along the guide groove 104, driving the mutually closely attached moving blocks 6 to expand again, clearing the sand conveying channel, and preparing for the next round of sand-shooting operation.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A sand-discharging mechanism for a core shooter, comprising a sand-discharging base (101), characterized in that: The side wall of the sand-shooting seat (101) is fixed with a fixed seat (102), and two sand-shooting heads (103) are installed on the surface of the fixed seat (102). A cavity is opened in the fixed seat (102), and a guide groove (104) is opened in the inner wall of the cavity. A sealing component is provided in the cavity of the fixed seat (102). An electric telescopic rod (2) is provided in the sand-shooting seat (101), and a push rod (201) is fixed at the extended end of the electric telescopic rod (2). The enclosed assembly includes a second fixed plate (301) that is slidably installed in the cavity of the fixed base (102). A first fixed plate (3) is slidably installed on the side wall of the second fixed plate (301). Multiple sliding grooves (302) are provided on the surfaces of the first fixed plate (3) and the second fixed plate (301). A sliding block (601) is slidably installed in the sliding groove (302). A moving block (6) is fixed at the end of the sliding block (601). An adjusting block (602) is installed on the surface of the moving block (6). It also includes a first rotating disk (4) that is slidably installed in the cavity of the fixed base (102). A guide block (401) is fixed on the side wall of the first rotating disk (4). A second rotating disk (5) is slidably installed on the inner wall of the first rotating disk (4). Multiple adjustment grooves (402) are opened on the surfaces of the first rotating disk (4) and the second rotating disk (5). Multiple extrusion grooves (501) are opened on the side wall of the second rotating disk (5). A striking component is provided in the extrusion groove (501).

2. The sand discharge mechanism for a core shooter according to claim 1, characterized in that: The guide groove (104) is spirally designed, and the guide block (401) is located inside the guide groove (104).

3. The sand discharge mechanism for a core shooter according to claim 2, characterized in that: The end of the push rod (201) is connected to the second fixed plate (301), the sliding groove (302) is inclined, and the first fixed plate (3) is rotatably connected to the first rotating plate (4).

4. The sand discharge mechanism for a core shooter according to claim 3, characterized in that: The adjustment groove (402) is designed to be inclined, and the adjustment block (602) is located inside the adjustment groove (402).

5. The sand discharge mechanism for a core shooter according to claim 4, characterized in that: The inner wall of the sand-shooting head (103) is fixed with a plurality of extrusion blocks (105) corresponding to the extrusion groove (501), and the two ends of the extrusion blocks (105) are designed to be inclined.

6. The sand discharge mechanism for a core shooter according to claim 5, characterized in that: The first rotating disk (4) has two push blocks (403) that are symmetrically limited and slidable on its surface, and the second rotating disk (5) has two limit blocks (502) that are symmetrically elastically limited and slidable on its sidewall. The sidewall of the limit block (502) is designed to be inclined, and the end of the push block (403) is in close contact with the sidewall of the limit block (502).

7. A sand-discharging mechanism for a core shooter according to claim 6, characterized in that: The striking assembly includes a striking seat (7) slidably mounted in the extrusion groove (501), a striking rod (701) slidably mounted at the end of the striking seat (7), a striking spring (702) provided on the surface of the striking seat (7), and a return spring (703) provided on the surface of the striking rod (701).

8. The sand discharge mechanism for a core shooter according to claim 7, characterized in that: The striking seat (7) is connected to the pressing groove (501) via the striking spring (702), and the striking rod (701) is connected to the striking seat (7) via the return spring (703).

9. A core shooter, applicable to the sand discharge mechanism for a core shooter as described in any one of claims 1-8, comprising a main body (1), characterized in that: The main body (1) is provided with a core box, and the sand-shooting seat (101) is installed inside the main body (1).

Images