A coated sand casting device

Abstract

The utility model discloses a kind of coated sand casting devices, belong to the field of foundry mould, a kind of coated sand casting device, including fixed mould and movable mould, the upper portion of movable mould is fixedly connected with the hydraulic telescopic link for lifting, further including cleaning device movably installed in movable mould interior, the middle part of movable mould is provided with rotary tank, cleaning device includes the air pipe rotatably installed in rotary tank interior, the bottom of air pipe is integrally formed with gas blowing head, the surface of gas blowing head is provided with several gas blowing holes;Control device is fixedly installed in movable mould interior, control device includes the limiting ring slidingly installed in rotary tank interior, it can realize movable mould and fixed mould after being separated can be through pressure sensor to realize the start of gas blowing, simultaneously can make cleaning device directly from the cavity inside movable mould Automatic extension and rotary cleaning, greatly save the overall cleaning time and reduce staff working intensity, improve the overall practicability of device.

Description

Technical Field

[0001] This utility model relates to the field of casting molds, and more specifically, to a coated sand casting device. Background Technology

[0002] Coated sand casting is a precision casting process that uses resin-coated sand particles (forming "coated sand") as the core molding material. It is particularly suitable for producing metal castings with high surface finish and complex structures. Its core principle is to melt and solidify the resin in the coated sand by heating, forming a high-strength, high-precision sand mold or core. During the manufacturing process, a mold with corresponding cavities is used to complete the casting operation.

[0003] In existing technologies, after the casting of the sand core is completed in coated sand casting, the interior of the mold cavity needs to be treated with air blowing, especially the moving mold. The cavity surface of the moving mold is generally facing downwards, which makes the existing cleaning methods more troublesome. Most existing methods directly use manual air guns to treat the interior of the mold to ensure that the casting quality of the next sand core will not be reduced due to the residue of the previous one. However, manual air blowing often requires the moving mold and the fixed mold to be completely separated before it can be carried out, and it also requires more manpower and time. Therefore, there are certain limitations to the existing casting molds. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide a coated sand casting device that can enable air blowing through a pressure sensor after the moving mold and fixed mold are separated. At the same time, it allows the cleaning device to automatically extend and rotate directly from inside the cavity of the moving mold for cleaning, which greatly saves the overall cleaning time and reduces the workload of workers, thus improving the overall practicality of the device.

[0005] To solve the above problems, the present invention adopts the following technical solution: A coated sand casting apparatus includes a fixed mold and a movable mold, wherein a hydraulic telescopic rod for lifting is fixedly connected above the movable mold, and further includes: A cleaning device is installed inside a moving mold. A rotating groove is provided in the middle of the moving mold. The cleaning device includes an air pipe that is rotatably installed inside the rotating groove. An air blower is integrally formed at the bottom of the air pipe. Several air blowing holes are provided on the surface of the air blower. A control device is fixedly installed inside the moving mold. The control device includes a limiting ring that is slidably installed inside the rotating groove. Connecting frames are fixedly installed on both the left and right sides of the limiting ring. A sleeve plate is fixedly connected to the outer end of the connecting frame. A plug rod is movably sleeved on the surface of the sleeve plate.

[0006] Furthermore, the moving mold also has two air inlet slots that are respectively connected to the left and right sides of the rotating slot and are symmetrical about the center of the rotating slot. The outer ends of the two air inlet slots are fixedly connected to air guide pipes, and the outer ends of the air guide pipes are fixedly connected to air pumps.

[0007] Furthermore, several connecting shafts are fixedly installed at the top end of the trachea, and guide vanes are fixedly installed at the outer ends of each connecting shaft. A connecting ring is fixedly connected to the top end of each connecting shaft.

[0008] Furthermore, the limiting ring is rotatably mounted on the surface of the connecting ring, and a sealing gasket is fixedly connected to the surface of the limiting ring, with the outer wall of the sealing gasket and the inner wall of the rotating groove fitting together.

[0009] Furthermore, a guide rod is fixedly connected to the top of the fixed mold, and a slot adapted to the insertion rod is opened on the top surface of the guide rod. A pressure sensor is fixedly connected inside the slot, and the pressure sensor and the air pump are electrically connected to each other.

[0010] Furthermore, a spring is fixedly connected between the socket plate and the insert rod, and the top end of the insert rod is fixedly connected inside the moving mold.

[0011] Compared with existing technologies, the advantages of this utility model are: This solution utilizes a cleaning device to automatically perform rotary air-blowing cleaning inside the mold cavity, effectively targeting residual particles on the surface, preventing adhesion that could affect the quality of the next casting process, reducing the workload of workers, and improving the overall practicality of the device.

[0012] This solution utilizes a control device that automatically senses the opening and closing of the fixed and moving molds via pressure sensors, thereby controlling the air pump to start air blowing. It can also simultaneously control the overall height of the cleaning device, thus determining whether to extend and the effectiveness of air blowing cleaning. This avoids the time-consuming limitation of cleaning that previously required the fixed and moving molds to be fully opened, further improving the overall production efficiency of the device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side sectional view of the moving mold and fixed mold combined, as well as a partial structure of the moving mold in this utility model; Figure 3 This is a top cross-sectional view of the distribution structure of the internal air inlet grooves of the moving mold in this utility model; Figure 4 This is a schematic diagram of the cleaning device structure in this utility model; Figure 5 This is a schematic diagram of the control device structure in this utility model.

[0014] Explanation of the labels in the diagram: 1. Fixed mold; 2. Moving mold; 3. Hydraulic telescopic rod; 4. Air pump; 5. Air guide pipe; 6. Cleaning device; 7. Control device; 101. Guide rod; 102. Pressure sensor; 201. Air inlet slot; 202. Rotary slot; 601. Air pipe; 602. Air blower head; 603. Air blowing hole; 604. Coupling shaft; 605. Guide vane; 606. Connecting ring; 701. Limiting ring; 702. Sealing gasket; 703. Connecting frame; 704. Sleeve plate; 705. Insert rod; 706. Spring. Detailed Implementation

[0015] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Example: Please see Figure 1-5 A coated sand casting apparatus includes a fixed mold 1 and a movable mold 2, wherein a hydraulic telescopic rod 3 for lifting is fixedly connected above the movable mold 2, and further includes: A cleaning device 6 is installed inside the moving mold 2. A rotating groove 202 is provided in the middle of the moving mold 2. The cleaning device 6 includes an air pipe 601 that is rotatably installed inside the rotating groove 202. An air blower head 602 is integrally formed at the bottom of the air pipe 601. A plurality of air blowing holes 603 are provided on the surface of the air blower head 602. A control device 7 is fixedly installed inside the moving mold 2. The control device 7 includes a limiting ring 701 that is slidably installed inside the rotating groove 202. A connecting frame 703 is fixedly installed on both the left and right sides of the limiting ring 701. A sleeve plate 704 is fixedly connected to the outer end of the connecting frame 703. A plug rod 705 is movably sleeved on the surface of the sleeve plate 704. The moving mold 2 also has two air inlet slots 201 that are respectively connected to the left and right sides of the rotating slot 202 and are symmetrical about the center of the rotating slot 202. The outer ends of the two air inlet slots 201 are fixedly connected to air guide pipes 5. The outer ends of the air guide pipes 5 are fixedly connected to air pumps 4. Several connecting shafts 604 are fixedly installed at the top of the air pipes 601. The outer ends of the connecting shafts 604 are fixedly installed with guide vanes 605. The top of the connecting shafts 604 is fixedly connected to a connecting ring 606. Specifically, the symmetrical arrangement of the air inlet slots 201 on both sides allows the airflow from the two outlets to be staggered. Combined with the guide vanes 605, this enables the rotation of the entire connecting shaft 604. At the same time, the airflow enters the air pipe 601 through the gap between the connecting shafts 604 and finally exits from the air blowing hole 603. This achieves the simultaneous rotation of the air blowing head 602 and a large-area cleaning effect. It should be noted that the surface of the air blowing hole 603 is flush with the surface of the cavity inside the moving mold 2, so it can be hidden during processing and does not affect the forming shape of the sand core. The limiting ring 701 is rotatably mounted on the surface of the connecting ring 606. A sealing gasket 702 is also fixedly connected to the surface of the limiting ring 701. The outer wall of the sealing gasket 702 and the inner wall of the rotating groove 202 are in contact with each other. A guide rod 101 is fixedly connected to the top of the fixed mold 1. A slot adapted to the insertion rod 705 is opened on the top surface of the guide rod 101. A pressure sensor 102 is fixedly connected inside the slot. The pressure sensor 102 and the air pump 4 are electrically connected to each other. A spring 706 is fixedly connected between the sleeve plate 704 and the insertion rod 705. The top of the insertion rod 705 is fixedly connected inside the moving mold 2. Specifically, the air pump 4 is started by the cooperation of the slot, the insertion rod 705, and the guide rod 101. It should be noted that the control technology and controller required in this process are existing mature technologies, so they will not be elaborated on in this application. Secondly, the sealing gasket 702 can isolate the outer wall of the limiting ring 701 from the inside of the rotating groove 202, ensuring that the airflow blown out of the air inlet groove 201 will not leak. Finally, the mutual cooperation of the limiting ring 701 and the spring 706 can realize the rotation limit and lifting control of the overall position of the connecting ring 606, ensuring that its position can change with the changes of the fixed mold 1 and the moving mold 2 when they are closed and separated, thus achieving the effect of automatic control.

[0019] The working principle of this utility model is as follows: After the fixed mold 1 and the moving mold 2 separate, the hydraulic telescopic rod 3 drives the moving mold 2 to detach from the top of the fixed mold 1. The bottom end of the insert rod 705 gradually moves away from the top of the pressure sensor 102. When the pressure sensor 102 loses pressure sensing, a signal is transmitted, causing the controller to control the air pump 4 to start. At the same time, the spring 706, due to the lack of upward pressure at its bottom end, resets downward, causing the limit ring 701 to move downward, squeezing the air blower head 602 out of the cavity of the moving mold 2. The air pump 4 draws in air, which is introduced from the inside of the air guide pipe 5 into the inside of the air inlet groove 201. After acting on the inside of the rotating groove 202, it is aligned with the connecting shaft 604 and the guide vane 605 for air blowing. The airflow rotates the guide vane 605 while entering the air pump 4 from the inside of the connecting shaft 604. The air from inside pipe 601 and air blower head 602 is finally ejected from inside the rotating air blower hole 603, acting on the cavity inside the moving mold 2 to clean the cavity. It should be noted that when the moving mold 2 rises a short distance, the pressure sensor 102 receives a signal and directly starts the air blower. The airflow will flow along the gap between the moving mold cavity and the molded part, and flow out from the narrow gap between the fixed mold 1 and the moving mold 2. As the gas flow rate at the upper end of the fixed mold 1 increases and the pressure decreases, the particles inside the fixed mold 1 will also be carried out of the fixed mold 1, completing the cleaning of the cavity of the fixed mold 1 and the moving mold 2. When the fixed mold 1 and the moving mold 2 are closed, the guide rod 101 drives the pressure sensor 102 to contact the insert rod 705, shutting off the air pump 4. The air pipe 601 moves upward as a whole, so that its surface contacts the port of the air inlet groove 201 to complete the seal.

[0020] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A coated sand casting apparatus, comprising a fixed mold (1) and a movable mold (2), wherein a hydraulic telescopic rod (3) for lifting is fixedly connected above the movable mold (2), characterized in that: Also includes A cleaning device (6) is installed inside the moving mold (2). A rotating groove (202) is provided in the middle of the moving mold (2). The cleaning device (6) includes an air pipe (601) that is rotatably installed inside the rotating groove (202). An air blower (602) is integrally formed at the bottom of the air pipe (601). A plurality of air holes (603) are provided on the surface of the air blower (602). A control device (7) is fixedly installed inside the moving mold (2). The control device (7) includes a limiting ring (701) that is slidably installed inside the rotating groove (202). A connecting frame (703) is fixedly installed on both the left and right sides of the limiting ring (701). A socket plate (704) is fixedly connected to the outer end of the connecting frame (703). A plug rod (705) is movably sleeved on the surface of the socket plate (704).

2. The coated sand casting apparatus according to claim 1, characterized in that: The moving mold (2) also has two air inlet slots (201) that are respectively connected to the left and right sides of the rotating slot (202) and are symmetrical about the center of the rotating slot (202). The outer ends of the two air inlet slots (201) are fixedly connected to air guide pipes (5), and the outer ends of the air guide pipes (5) are fixedly connected to air pumps (4).

3. The coated sand casting apparatus according to claim 1, characterized in that: The top end of the trachea (601) is fixedly installed with several connecting shafts (604), and the outer ends of the connecting shafts (604) are all fixedly installed with guide vanes (605). The top end of the connecting shafts (604) is fixedly connected with a connecting ring (606).

4. The coated sand casting apparatus according to claim 3, characterized in that: The limiting ring (701) is rotatably mounted on the surface of the connecting ring (606), and a sealing gasket (702) is also fixedly connected to the surface of the limiting ring (701). The outer wall of the sealing gasket (702) and the inner wall of the rotating groove (202) are in contact with each other.

5. The coated sand casting apparatus according to claim 2, characterized in that: The top of the fixed mold (1) is fixedly connected to a guide rod (101). The top surface of the guide rod (101) is provided with a slot that is compatible with the insert rod (705). A pressure sensor (102) is fixedly connected inside the slot. The pressure sensor (102) and the air pump (4) are electrically connected to each other.

6. The coated sand casting apparatus according to claim 1, characterized in that: A spring (706) is fixedly connected between the socket plate (704) and the insert rod (705), and the top end of the insert rod (705) is fixedly connected to the inside of the moving mold (2).

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