Clay sand core making machine

Abstract

The utility model relates to the technical field of clay processing, and discloses a clay sand core making machine which comprises a machine body, a fixing frame fixedly installed on the machine body, an air cylinder arranged on the fixing frame, a lifting plate fixedly installed at the output end of the air cylinder, an upper die plate arranged on the lifting plate, a sliding plate installed on the machine body in a sliding mode, and two lower die plates installed on the sliding plate. And demolding mechanisms are arranged in the two lower mold plates correspondingly, and a sliding mechanism and a jacking mechanism are arranged in the machine body. Through the innovative multi-station design, the working procedures of sand filling, pressing, coring and the like are synchronously carried out, and the production efficiency is greatly improved; the automatic ejection mechanism ensures the accuracy and stability of the sand core demolding process, and errors and risks caused by manual intervention are reduced; and an automatic release agent spraying system ensures that the surface of the lower mold plate is uniformly covered with a release agent, so that the sand core quality and the demolding success rate are improved.

Description

A clay sand core making machine Technical Field

[0001] This utility model relates to the field of clay processing, specifically a clay sand core-making machine. Background Technology

[0002] In the casting production process, core making is a crucial step, especially for castings with complex structures and numerous internal cavities. High-quality sand cores directly affect the dimensional accuracy and surface quality of the casting. Clay sand, as a traditional molding material, remains widely used in small and medium-sized foundries due to its low cost, moderate strength, and good recyclability. Currently, clay sand core making is mainly accomplished manually or with semi-automatic equipment, and its basic process includes multiple steps such as sand mixing, filling, compaction, and demolding.

[0003] The patent with publication number CN219074306U discloses a clay sand core-making machine, including a sand box and a pressure plate. The pressure plate is located above the sand box. Vertical plates are fixedly connected to the left and right sides of the sand box. An arc plate is set below the sand box and between the two vertical plates. The left and right sides of the arc plate are fixedly connected to the lower ends of the two vertical plates respectively. A push plate is slidably inserted inside the sand box. A central rod is fixedly connected to the bottom surface of the push plate. The lower end of the central rod slides through the inner bottom wall of the sand box. A spring is movably sleeved at the lower end of the central rod.

[0004] However, the above-mentioned device has the following problems when in use: The equipment is designed with a single workstation, and its operation process requires the sequential completion of processes such as sand filling, pressing, demolding and cleaning. There is a significant "waiting window" between each step, resulting in insufficient equipment utilization. In the single workstation mode, operators need to intervene frequently during the equipment's operation intervals, such as manually demolding, cleaning the mold or spraying release agent, which leads to a longer production cycle and a high degree of manual dependence. In addition, operators need to be in close contact with the mold area to take cores or make adjustments, which makes them susceptible to mechanical compression or high-temperature sand core burns. Furthermore, the reliance on manual spraying can easily lead to local over-spraying or missed spraying of release agent, causing the sand core to stick to the mold and requiring violent knocking to demold, further increasing the risk of mold damage and the probability of personnel injury. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing a clay sand core-making machine. Through multi-station design, automatic ejection and automatic spraying of release agent, it significantly improves production efficiency, product consistency and operational safety.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A clay sand core-making machine includes a machine body, a fixed frame fixedly installed on the machine body, a cylinder installed on the fixed frame, a lifting plate fixedly installed at the output end of the cylinder, an upper template installed on the lifting plate, a sliding plate slidably installed on the machine body, two lower templates installed on the sliding plate, a demolding mechanism installed inside each of the two lower templates, and a sliding mechanism and a lifting mechanism installed inside the machine body.

[0008] Preferably, the demolding mechanism includes a sliding frame, which is slidably mounted on the lower template. An ejector plate is fixedly mounted on the side of the sliding frame facing the lower template. A return spring is fixedly mounted on the sliding frame, and the other end of the return spring is fixedly mounted on the sliding plate.

[0009] Preferably, the sliding mechanism includes a stepper motor and two threaded rods. A synchronous chain is installed between the two threaded rods via a sprocket. Each of the two threaded rods is threaded with a nut pair, which is fixedly connected to the sliding plate. The stepper motor is mounted on the machine body, and the output end of the stepper motor shaft is fixedly connected to one of the threaded rods.

[0010] Preferably, the lifting mechanism includes a fixed plate and a track. The fixed plate is fixedly installed on the sliding frame, and there are two fixed plates on each sliding frame. Each fixed plate is rotatably mounted with a pulley. There are two tracks, which are fixedly installed inside the machine body and have grooves for sliding.

[0011] Preferably, the track has a structure with ramps on both sides and a lower, horizontal middle section.

[0012] Preferably, either of the two lower templates can be used independently with the lifting plate.

[0013] Preferably, a liquid storage tank is fixedly installed on the machine body, and two pump bodies are provided on the liquid storage tank. Both pump bodies are connected to the liquid storage tank. A delivery pipe is embedded in the output end of each of the two pump bodies. A mounting bracket is fixedly installed at the other end of each of the two delivery pipes. Both mounting brackets are fixedly installed on a fixed frame, and atomizing nozzles are embedded at equal intervals on one side of each mounting bracket facing the fixed frame. The atomizing nozzles are adapted to the fixed frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention employs a dual-station structure design. A sliding plate drives two lower templates to switch positions laterally, allowing one station to perform sand filling and pressing while the other station performs auxiliary operations such as core removal and dust blowing, significantly improving production continuity and efficiency. For demolding, the lifting mechanism works in conjunction with the demolding mechanism, utilizing a track ramp structure to control the pulley's trajectory, enabling the sliding frame to automatically rise and eject the sand core. A return spring ensures stable and reliable ejection, avoiding the low efficiency and inconsistent quality issues of traditional manual demolding. Simultaneously, the equipment is equipped with an automatic release agent spraying system. When the empty lower template moves to the designated position, the pump delivers the release agent to the atomizing nozzle, evenly spraying it onto the lower template surface. This ensures effective demolding, improves the quality of the sand core forming, and reduces subsequent scrap rates. Overall, this equipment achieves fully automated operation from sand filling, pressing, demolding to release agent spraying, reducing labor intensity and significantly improving production efficiency and product consistency, demonstrating promising application prospects and promotional value. Attached Figure Description

[0016] Figure 1 is a schematic diagram of a clay sand core-making machine proposed in this utility model;

[0017] Figure 2 is a schematic diagram of the installation position of a clay sand core-making machine proposed in this utility model;

[0018] Figure 3 is a schematic diagram of the sliding mechanism of a clay sand core making machine proposed in this utility model.

[0019] Figure 4 is a schematic diagram of the lifting mechanism of a clay sand core making machine proposed in this utility model.

[0020] Figure 5 is a schematic diagram of the demolding mechanism of a clay sand core making machine proposed in this utility model.

[0021] In the diagram: 1. Machine body; 2. Fixing frame; 3. Cylinder; 4. Lifting plate; 5. Upper template; 6. Sliding plate; 7. Lower template; 8. Synchronous chain; 9. Stepper motor; 10. Liquid storage tank; 11. Pump body; 12. Delivery pipe; 13. Mounting bracket; 14. Atomizing nozzle; 15. Threaded rod; 16. Nut pair; 17. Sliding frame; 18. Return spring; 19. Fixing plate; 20. Pulley; 21. Ejector plate; 22. Track. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please refer to Figures 1 to 5. A clay sand core making machine includes a machine body 1, a fixed frame 2 fixedly installed on the machine body 1, a cylinder 3 installed on the fixed frame 2, a lifting plate 4 fixedly installed at the output end of the cylinder 3, and an upper template 5 installed on the lifting plate 4. The fixed frame 2 serves as the core support structure and guides the lifting plate 4 when pressing the sand core. By activating the cylinder 3, the lifting plate 4 is driven to complete the precise downward pressing action of the upper template 5, ensuring stable sand core forming pressure.

[0024] As a preferred option, the body 1 is equipped with a control system, which enables corresponding automated operations through the control board.

[0025] As a preferred option, automatic sand filling can be performed using the upper template 5.

[0026] A sliding plate 6 is slidably mounted on the body 1, and two lower templates 7 are mounted on the sliding plate 6.

[0027] Both lower mold plates 7 are equipped with demolding mechanisms, and the machine body 1 is equipped with a sliding mechanism and a lifting mechanism. The demolding mechanism and the lifting mechanism work together. The lifting mechanism provides power, and the demolding mechanism performs the ejection action. After pressing, the sand core is ejected through precise mechanical coordination.

[0028] After the sand core on one side is made, the sliding plate 6 moves the lower template 7 to switch horizontally via the sliding mechanism. The dual-station design allows the operator to automatically and synchronously perform sand filling and molding operations at the other station while the other station is blowing dust and taking cores, thus improving production efficiency.

[0029] The demolding mechanism includes a sliding frame 17, which is slidably mounted on the lower template 7. An ejector plate 21 is fixedly mounted on the side of the sliding frame 17 facing the lower template 7. A return spring 18 is fixedly mounted on the sliding frame 17, and the other end of the return spring 18 is fixedly mounted on the sliding plate 6.

[0030] When the sand core is demolded, the lifting mechanism pushes the sliding frame 17, causing the ejector plate 21 to push the sand core out of the lower template 7, thereby realizing the demolding activity.

[0031] The sliding mechanism includes a stepper motor 9 and two threaded rods 15. A synchronous chain 8 is installed between the two threaded rods 15 via a sprocket. Nut pairs 16 are threadedly installed on both threaded rods 15. The nut pairs 16 are fixedly connected to the sliding plate 6. The stepper motor 9 is mounted on the machine body 1. The output end of the shaft of the stepper motor 9 is fixedly connected to one of the threaded rods 15.

[0032] Start the stepper motor 9, which drives the connected threaded rod 15 to rotate. The synchronous chain 8 causes the other threaded rod 15 to rotate synchronously. The rotation of the threaded rod 15 causes the nut pair 16 to move on it, thereby driving the sliding plate 6 to slide on the machine body 1, realizing the switching of the lower template 7.

[0033] Preferably, the sprocket and the synchronous chain 8 can be driven by a tooth or a chain to ensure the transmission ratio and avoid slippage.

[0034] The lifting mechanism includes a fixed plate 19 and a track 22. The fixed plate 19 is fixedly installed on the sliding frame 17. There are two fixed plates 19 on each sliding frame 17. Each fixed plate 19 is rotatably installed with a pulley 20. There are two tracks 22. The tracks 22 are fixedly installed inside the machine body 1. The tracks 22 have grooves for sliding.

[0035] The track 22 has a structure with slopes on both sides and a lower and horizontal middle section. It can precisely control the rise and fall of the sliding frame 17 according to the changes in the slopes and the horizontal section, thereby achieving the smooth lifting of the sand core.

[0036] When the sliding plate 6 moves the lower template 7, the pulley 20 on the fixed plate 19 slides in the groove of the track 22. Since the track 22 has a structure with slopes on both sides and a lower and horizontal middle, the pulley 20 will cause the sliding frame 17 to rise or fall when it moves on the slope, thereby realizing the automatic lifting of the sand core. Under the action of the reset spring 18, when the pulley 20 moves to the corresponding position, the ejector plate 21 can be effectively reset.

[0037] Either of the two lower templates 7 can be used independently with the lifting plate 4. Operators can use the lateral movement of the sliding mechanism to alternately align different lower templates 7 with the upper template 5 according to actual production needs, thereby improving the flexibility of equipment use and production efficiency.

[0038] A liquid storage tank 10 is fixedly installed on the main body 1. Two pump bodies 11 are installed on the liquid storage tank 10. Both pump bodies 11 are connected to the liquid storage tank 10. A delivery pipe 12 is embedded in the output end of each of the two pump bodies 11. A mounting bracket 13 is fixedly installed at the other end of each of the two delivery pipes 12. Both mounting brackets 13 are fixedly installed on a fixed frame 2. Atomizing nozzles 14 are embedded at equal intervals on the side of the two mounting brackets 13 facing the fixed frame 2. The atomizing nozzles 14 are adapted to the fixed frame 2.

[0039] When the empty lower template 7 is moved, the lower template 7 will move relative to the mounting frame 13 on the corresponding side. At this time, the pump body 11 on the corresponding side is started, and the liquid in the storage tank 10 is transported to the atomizing nozzle 14 on the mounting frame 13 through the delivery pipe 12. The atomizing nozzle 14 atomizes the liquid and sprays it out, which can be used to evenly spray the release agent on the moving lower template 7 to ensure that the release agent effectively covers the lower template 7, and to ensure the quality of the sand core and the demolding effect.

[0040] It is worth noting that, taking Figure 1 as an example, when the right side of the lower left template 7 is directly below the left side of the mounting bracket 13, the pulley 20 on the lower left template 7 should be on the lower horizontal part of the track 22 to ensure that the ejector plate 21 inside the lower left template 7 fits against the bottom surface of the lower left template 7, thereby ensuring the spraying effect of the release agent. The same applies to the right side.

[0041] The working process of this utility model;

[0042] First, after the control system on the machine body 1 is started, the required operating parameters are set through the control board.

[0043] Initially, a lower template 7 is located directly below the working position. The automatic sand filling device begins to fill the lower template 7, which is in the working position, with clay sand. The cylinder 3 is activated, driving the lifting plate 4 and the upper template 5 to perform a precise downward pressing action, thus completing the pressure application for sand core forming.

[0044] Once the sand core on one side is completed, the stepper motor 9 starts, driving the threaded rod 15 to rotate. The synchronous chain 8 causes the other threaded rod 15 to rotate synchronously, thereby causing the sliding plate 6 and the two lower templates 7 installed on it to move laterally, switching the work position. The empty lower template 7 is moved to the position directly below the work position, and the lower template 7 containing the formed sand core is moved to the left or right side of the work position.

[0045] When the sliding plate 6 moves the lower template 7, the pulley 20 on the fixed plate 19 slides in the groove of the track 22. According to the design of the track 22 (sloping on both sides, low and horizontal in the middle), when the pulley 20 moves on the slope, it will cause the sliding frame 17 to rise. The ejector plate 21 will eject the sand core from the lower template 7, thus completing the demolding of the lower template 7 containing the shaped sand core and the dust blowing activity.

[0046] When the empty lower template 7 is moved to the working position, the pump body 11 starts and delivers the release agent in the storage tank 10 to the atomizing nozzle 14 through the delivery pipe 12. The lower template 7 and the atomizing nozzle 14 are relatively displaced, and the release agent is evenly sprayed onto the moving lower template 7 to ensure the quality and demolding effect of the subsequent sand core.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clay sand core-making machine, comprising a machine body (1), a fixed frame (2) fixedly installed on the machine body (1), a cylinder (3) provided on the fixed frame (2), a lifting plate (4) fixedly installed at the output end of the cylinder (3), and an upper template (5) provided on the lifting plate (4), characterized in that, A sliding plate (6) is slidably installed on the body (1), and two lower templates (7) are installed on the sliding plate (6). A demolding mechanism is provided inside the two lower templates (7), and a sliding mechanism and a lifting mechanism are provided inside the body (1).

2. A clay sand core making machine according to claim 1, characterized in that The demolding mechanism includes a sliding frame (17), which is slidably mounted on the lower template (7). An ejector plate (21) is fixedly mounted on the side of the sliding frame (17) facing the lower template (7). A reset spring (18) is fixedly mounted on the sliding frame (17), and the other end of the reset spring (18) is fixedly mounted on the sliding plate (6).

3. A clay sand core making machine according to claim 1, characterized in that The sliding mechanism includes a stepper motor (9) and a threaded rod (15). There are two threaded rods (15). A synchronous chain (8) is installed between the two threaded rods (15) through a sprocket. A nut pair (16) is installed on each of the two threaded rods (15) through a thread. The nut pair (16) is fixedly connected to the sliding plate (6). The stepper motor (9) is installed on the machine body (1). The output end of the shaft of the stepper motor (9) is fixedly connected to one of the threaded rods (15).

4. A clay sand core-making machine according to claim 1, characterized in that, The lifting mechanism includes a fixed plate (19) and a track (22). The fixed plate (19) is fixedly installed on the sliding frame (17). There are two fixed plates (19) on each sliding frame (17). Each fixed plate (19) is rotatably installed with a pulley (20). There are two tracks (22). The tracks (22) are fixedly installed inside the machine body (1). The tracks (22) have grooves for sliding.

5. A clay sand core-making machine according to claim 4, characterized in that, The track (22) has a structure with slopes on both sides and a lower and horizontal middle section.

6. A clay sand core-making machine according to claim 1, characterized in that, Either of the two lower templates (7) can be used alone with the lifting plate (4).

7. A clay sand core making machine according to claim 1, characterized in that A liquid storage tank (10) is fixedly installed on the body (1). Two pump bodies (11) are provided on the liquid storage tank (10). Both pump bodies (11) are connected to the liquid storage tank (10). A delivery pipe (12) is embedded in the output end of each of the two pump bodies (11). A mounting bracket (13) is fixedly installed at the other end of each of the two delivery pipes (12). Both mounting brackets (13) are fixedly installed on the fixed frame (2). Atomizing nozzles (14) are embedded at equal intervals on the side of the two mounting brackets (13) facing the fixed frame (2). The atomizing nozzles (14) are adapted to the fixed frame (2).

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