A core shooter

Abstract

A core shooter is used to solve the technical problem that the core shooter in the prior art mentioned in the background art can turn over the sand forming mold fixed thereto through a turning assembly, but due to factors such as pressure in the process of pressing the sand forming, the pressed sand forming is attached to the surface of the mold, and after the mold is turned over, the operator still needs to manually remove the pressed sand forming from the mold, comprising a workbench, a first mold is rotatably arranged on the workbench, a second mold is arranged on the workbench and is movable towards the first mold, a driving assembly is arranged on the workbench and is used to drive the first mold to rotate, a first electric push rod is arranged on the workbench and is used to drive the second mold to move towards the first mold, a second electric push rod is arranged on the first mold, a ejector pin is arranged on the extension end of the second electric push rod, a placement table is vertically slidably arranged on the workbench and is located directly below the first mold, and the ejector pin is used to push the sand forming pressed in the first mold and push it to the top of the placement table.

Description

Technical Field

[0001] This utility model relates to the field of core shooting machine processing technology, and specifically to a core shooting machine. Background Technology

[0002] Core shooters use coated sand for core making and are suitable for both hot and cold core boxes. Coated sand is molding sand or core sand with a layer of solid resin film on the surface of the sand grains before molding, and is used for cast steel and cast iron parts.

[0003] A prior art core shooting machine, such as the invention patent document with authorization announcement number "CN220862672U" and patent name "A Casting Core Shooting Machine", discloses a core shooting machine including a core shooting machine body; a flipping component is installed on the core shooting machine body; a positioning component is installed on the rear side of the flipping component; a molding sand forming component is installed on the flipping component and the pushing component; a servo motor is fixedly connected to the front support mounting base; and a flipping drive shaft is rotatably installed on the two support mounting bases, and the front side of the flipping drive shaft is fixedly connected to the servo motor.

[0004] The aforementioned patent document describes how a flipping component can flip the molding sand mold that is fixed to it, making it easier for the operator to remove the pressed molding sand from the mold. However, due to factors such as pressure during the molding process, the pressed molding sand will adhere to the mold surface. After the mold is flipped, the operator still needs to manually remove the pressed molding sand from the mold. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology by proposing a core shooter to solve the technical problem mentioned in the background art. In the existing core shooter, the core shooter can flip the molding sand mold fixed to it through the flipping component, so that the operator can easily take out the pressed molding sand from the mold. However, due to factors such as pressure during the molding process, the pressed molding sand will stick to the mold surface. After the mold is flipped, the operator still needs to manually take out the pressed molding sand from the mold.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A workbench is included, on which a first mold is rotatably mounted, and a second mold is mounted on the workbench that moves toward the first mold. The first and second molds are used to press and shape molding sand. A drive assembly for driving the first mold to rotate is provided on the workbench. A first electric push rod for driving the second mold to move toward the first mold is provided on the workbench. A second electric push rod is provided on the first mold. A ejector pin is fixed on the telescopic end of the second electric push rod. A placement platform is vertically slidable on the workbench, and the placement platform is located directly below the first mold. The ejector pin is used to push the molding sand pressed and formed in the first mold toward the top of the placement platform.

[0007] Working principle: First, driven by the first electric push rod, the second mold moves towards the first mold, closing with it to jointly press and shape the molding sand. At this time, the first and second molds are in a closed state, and the molding sand is formed within the mold cavity. After the molding sand is shaped, the drive assembly drives the first mold to rotate, orienting its cavity towards the placement platform directly below. This rotation adjusts the mold's position, preparing for the ejection operation. Once the first mold is in position, the second electric push rod actuates, extending the ejector pin. The ejector pin enters the cavity of the first mold, ejecting the pressed molding sand and pushing it towards the top of the placement platform. The placement platform is vertically slidable and positioned below the first mold during ejection to receive the molding sand. The ejected molding sand falls onto the top of the placement platform, completing the automatic demolding. The placement platform can then slide vertically downwards for easy removal of the finished molding sand.

[0008] Compared with the prior art, the present invention has the following beneficial effects: With the second electric push rod and ejector pin, the pressed molding sand can be automatically ejected onto the placement table, which improves production efficiency and reduces labor intensity. The placement table is located directly below the first mold, and the first mold can rotate, making the ejection action direct and accurate, reducing the risk of molding sand damage. The electric push rod drives the ejection and mold movement, which is precise, stable, and suitable for continuous production environments. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the assembly structure of the third electric actuator and the placement platform.

[0010] Explanation of reference numerals in the attached drawings: Workbench 1, First mold 2, Second mold 3, First electric push rod 4, Second electric push rod 5, Ejector pin 6, Placement table 7, Motor 8, Worm gear 9, Worm wheel 10, Support frame 11, Rotating shaft 12, Fixing block 13, First guide rod 14, First spring 15, Third electric push rod 16, Mounting plate 17, Second guide rod 18, Second spring 19, Mounting bracket 20, Sliding plate 21, Abutment rod 22. Detailed Implementation

[0011] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0012] Example: like Figure 1 and Figure 2 As shown, a core shooting machine includes a worktable 1, on which a first mold 2 is rotatably mounted, and a second mold 3 is mounted on the worktable 1 and moves toward the first mold 2. The first mold 2 and the second mold 3 are used to press and shape molding sand. The worktable 1 is provided with a drive assembly for driving the first mold 2 to rotate. The drive assembly includes a motor 8, a worm gear 9, and a worm wheel 10. The motor 8 is fixed to the worktable 1, and a support frame 11 is fixed to the worktable 1. Rotating shafts 12 are fixed on both sides of the first mold 2, and the two rotating shafts 12 are connected to the support frame 1. 1. Rotary connection: The worm 9 is fixed to the output end of the motor 8, and the worm wheel 10 is fixed to one of the rotating shafts 12 and meshes with the worm 9. When the molding sand is pressed and formed between the first mold 2 and the second mold 3, the motor 8 starts and drives the worm 9 to rotate. The worm 9 meshes with the worm wheel 10 and transmits power to the rotating shaft 12 of the first mold 2, enabling the first mold 2 to achieve a flipping action. The structure of the worm 9 and the worm wheel 10 can ensure that the first mold 2 can stay stably at a certain angle, especially when the opening is facing down after flipping, it will not rotate on its own due to gravity.

[0013] like Figure 1As shown, the workbench 1 is equipped with a first electric push rod 4 for driving the second mold 3 to move toward the first mold 2. A fixed block 13 is fixed on the workbench 1, and the first electric push rod 4 is fixed on the fixed block 13. Two first guide rods 14 are fixed on the second mold 3. Both first guide rods 14 are slidably connected to the fixed block 13. A first spring 15 is sleeved on each of the two first guide rods 14. The two ends of the two first springs 15 are fixed to the fixed block 13 and the first guide rods 14, respectively. The first electric push rod 4 extends and pushes the second mold 3 to move toward the first mold 2 along the guide of the first guide rod 14 to complete the mold closing and perform molding sand pressing. The first spring 15 can be compressed during the mold closing process, which plays a buffering role. The first guide rod 14 ensures the straightness and stability of the movement of the second mold 3 and prevents mold misalignment. The first spring 15 can effectively buffer the impact force at the moment of mold closing, making the mold closing process smoother, which helps to protect the mold surface and molding sand shape and improve the quality of the sand core.

[0014] like Figure 1 and Figure 2 As shown, the first mold 2 is equipped with a second electric push rod 5, and an ejector pin 6 is fixedly mounted on the telescopic end of the second electric push rod 5. A placement platform 7 is vertically slidable on the worktable 1, and the placement platform 7 is located directly below the first mold 2. The ejector pin 6 is used to push the molding sand pressed and formed in the first mold 2 towards the top of the placement platform 7. A mounting frame 20 is fixedly mounted on the first mold 2, and a third electric push rod 16 is fixedly mounted on the mounting frame 20. A sliding plate 21 is fixedly mounted on the telescopic end of the third electric push rod 16. The sliding plate 21 is slidably mounted on the mounting frame 20 and is located between the mounting frame 20 and the first mold 2. An abutment rod 22 is fixedly mounted on the sliding plate 21. The abutment rod 22 is used to push the placement platform 7 with the telescopic end of the second electric push rod 5 after the first mold 2 rotates. After the molding sand is shaped and the first mold 2 is flipped, the second electric push rod 5 is activated to push the ejector pin 6 to push the sand core out of the first mold 2. At the same time, the third electric push rod 16 pushes the placement platform 7 upward through the sliding plate 21 and the abutment rod 22 to smoothly receive the falling sand core. The ejector pin 6 realizes the automatic demolding of the sand core, avoiding the damage that may be caused by traditional manual core removal. It is particularly effective for molding sand that may stick to the mold. The placement platform 7 can be raised and lowered to be adjusted to the optimal position to receive the sand core, reduce the drop distance, and effectively prevent the sand core from breaking or developing surface defects due to impact.

[0015] like Figure 1 and Figure 2As shown, a third electric push rod 16 is fixedly installed at the bottom of the workbench 1, and a mounting plate 17 is fixedly installed on the telescopic end of the third electric push rod 16. A second guide rod 18 is fixedly installed at the bottom of the placement platform 7. The second guide rod 18 is slidably connected to the mounting plate 17, and a second spring 19 is sleeved on the guide rod. The two ends of the second spring 19 are fixedly connected to the mounting plate 17 and the placement platform 7, respectively. The third electric push rod 16 drives the mounting plate 17 and the placement platform 7 to rise and fall as a whole. The second guide rod 18 slides in the mounting plate 17 and plays a guiding role. The second spring 19 provides cushioning when the placement platform 7 receives the sand core. The second guide rod 18 ensures that the placement platform 7 moves strictly in the vertical direction to prevent swaying. The second spring 19 can effectively absorb the impact energy of the sand core falling on the placement platform 7, playing a good cushioning role and protecting the integrity of the sand core, which is especially important for sand cores with low strength.

[0016] Working principle: The first electric push rod 4 drives the second mold 3 to move smoothly towards the first mold 2 along the first guide rod 14. After the two close, they press the injected molding sand into shape. Then, the drive assembly is started. The motor 8 drives the first mold 2 and the sand core inside it to rotate around the rotating shaft 12 through the transmission of the worm gear 9 and the worm wheel 10, so that the opening of its cavity faces the placement platform 7 below. Then, the ejection process begins. The second electric push rod 5 fixed on the first mold 2 moves and pushes the ejector pin 6 into the cavity to push the formed sand core away from the mold surface. At the same time, in order to smoothly receive the sand core, the third electric push rod 16 at the bottom of the worktable 1 pushes the mounting plate 17 to rise, so that the placement platform 7 moves upward along the guide of the second guide rod 18 to approach the mold. During this process, the second spring 19 provides a buffering effect to ensure that the sand core is gently received on the top of the placement platform 7.

[0017] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A core shooting machine, characterized in that, The system includes a workbench (1), on which a first mold (2) is rotatably mounted, and on which a second mold (3) is mounted that moves toward the first mold (2). The first mold (2) and the second mold (3) are used to press and shape molding sand. The workbench (1) is provided with a drive assembly for driving the first mold (2) to rotate. The workbench (1) is provided with a first electric push rod (4) for driving the second mold (3) to move toward the first mold (2). The first mold (2) is provided with a second electric push rod (5). A ejector pin (6) is fixed on the telescopic end of the second electric push rod (5). A placement platform (7) is vertically slidably mounted on the workbench (1) and is located directly below the first mold (2). The ejector pin (6) is used to push the molding sand pressed and formed in the first mold (2) toward the top of the placement platform (7).

2. A core shooter according to claim 1, characterized in that: The drive assembly includes a motor (8), a worm (9), and a worm wheel (10). The motor (8) is fixed on the workbench (1), and a support frame (11) is fixed on the workbench (1). Two rotating shafts (12) are fixed on both sides of the first mold (2), and the two rotating shafts (12) are rotatably connected to the support frame (11). The worm (9) is fixed on the output end of the motor (8), and the worm wheel (10) is fixed on one of the rotating shafts (12) and meshes with the worm (9).

3. A core shooting machine according to claim 1, characterized in that: A fixed block (13) is fixed on the workbench (1), the first electric push rod (4) is fixed on the fixed block (13), and two first guide rods (14) are fixed on the second mold (3). Both first guide rods (14) are slidably connected to the fixed block (13), and a first spring (15) is sleeved on both first guide rods (14). The two ends of the two first springs (15) are fixed to the fixed block (13) and the first guide rods (14) respectively.

4. A core shooter according to claim 1, characterized in that: The bottom of the workbench (1) is fixedly provided with a third electric push rod (16), and the telescopic end of the third electric push rod (16) is fixedly provided with an mounting plate (17). The bottom of the placement platform (7) is fixedly provided with a second guide rod (18), which is slidably connected to the mounting plate (17). A second spring (19) is sleeved on the guide rod, and the two ends of the second spring (19) are fixedly connected to the mounting plate (17) and the placement platform (7) respectively.

5. A core shooter according to claim 4, characterized in that: A mounting bracket (20) is fixed on the first mold (2). The third electric push rod (16) is fixed on the mounting bracket (20). A sliding plate (21) is fixed on the telescopic end of the third electric push rod (16). The sliding plate (21) is slidably disposed on the mounting bracket (20) and the sliding plate (21) is located between the mounting bracket (20) and the first mold (2). An abutment rod (22) is fixed on the sliding plate (21). The abutment rod (22) is used to push the placement platform (7) with the telescopic end of the second electric push rod (5) after the first mold (2) rotates.

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