A casting nozzle pan sealing and draining device and a nozzle pan manufacturing device

Abstract

The utility model relates to foundry molding / core making / pouring field, concretely is a kind of foundry nozzle basin sealing drainage device and nozzle basin manufacturing device, it is applicable to the sealing of nozzle basin and molten iron drainage in the pouring process of various castings.Nozzle basin sealing drainage device is matched with the structure of the shape size of nozzle eye of nozzle basin, and nozzle eye is formed by the placement of nozzle basin sealing drainage device on nozzle basin mould, the upper surface and the lower surface of nozzle basin sealing drainage device are parallel plane and are provided with drainage hole in center, one side of nozzle basin sealing drainage device is circular arc structure, and other three sides are plane structure.The utility model solves the problems of high cost, poor sealing and many casting defects of existing foundry nozzle basin manufacturing device by the characteristics and flexible structure design of sand core material, and significantly improves casting quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of casting molding / core making / pouring, specifically a casting sprue basin sealing and diversion device and a sprue basin making device, which is applicable to the sealing of the sprue basin and the diversion of molten iron during the pouring process of various castings. Background Technology

[0002] Currently, most sprue ports in castings use ceramic refractory tubes or paper tubes. Some castings use a method where the sprue port is directly connected to the casting. The cost of using refractory tubes and paper tubes is relatively high. The method where the sprue port is directly connected to the casting has limited sprue port position and cannot be used for all types of castings.

[0003] The patent with publication number CN101380675A proposes a casting drain plug for steel ladle nozzles and its usage method. It is used for draining the bottom brick nozzle of a steel ladle. It adopts a cage-like structure composed of iron wire and rings, combined with a draining agent packaged in a metal mesh bag. It cannot be sealed by grinding and sticking to the nozzle plug.

[0004] The patent with publication number CN220407096U proposes a seepage-proof steel structure for the tundish nozzle in continuous casting. The seepage-proof steel design for the tundish nozzle in continuous casting uses a Q345B steel collar in combination with diversion sand and refractory mud. The structure is fixed and can only be used in the tundish nozzle installation groove. It has no diversion function and cannot solve the casting quality problem of molten iron entering the mold cavity in advance during the casting process and forming cold shut iron slugs.

[0005] The patent with publication number CN107649670A proposes a sealing device for the long nozzle of a continuous casting ladle. It is designed to prevent molten steel from sucking in air from the long nozzle of the continuous casting ladle. The material is thermally expanded graphite. It can only be fixed on the long nozzle by a set. Its position and structure cannot be adjusted. It has no flow guiding function and cannot guide the molten iron into the mold cavity in an orderly manner.

[0006] The patent with publication number CN110935872A proposes a plugging cone and a plugging method for tundish nozzles. It is only used for emergency plugging of tundish nozzles. The materials are a plugging cone, steel pipe and aluminum granules. The structure is a fixed column and a conical plugging part. It has no drainage function and the size is not adjustable, so it cannot be applied to different nozzle positions of castings.

[0007] In summary, the existing technology lacks a device that is suitable for casting sprue basins, has low cost, flexible and adjustable structure, combines sealing and drainage functions, and can reduce casting defects. Utility Model Content

[0008] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a casting sprue basin sealing and diversion device and a sprue basin manufacturing device. By utilizing the characteristics of molding sand material and flexible structural design, the device solves the problems of high cost, poor sealing and numerous casting defects in existing casting sprue basin manufacturing devices, thereby significantly improving casting quality and production efficiency.

[0009] The technical solution of this utility model is: A sealing and drainage device for a casting sprue basin is provided. The sealing and drainage device is a structure that matches the shape and size of the sprue opening of the sprue basin. The sprue opening is formed by placing the sealing and drainage device on the sprue basin mold. The upper and lower surfaces of the sealing and drainage device are parallel and a drainage hole is provided in the center. One side of the sealing and drainage device is an arc structure, and the other three sides are planar structures.

[0010] The aforementioned casting sprue basin sealing and diversion device has a diversion hole and an outer sand mold thickness of 30mm~50mm.

[0011] A device for making a sprue basin includes a sand box placed on a mold plate, a sprue basin mold placed in the center of the inner cavity of the sand box, a sprue basin sealing and drainage device placed at any desired position on the top of the sprue basin mold, the top of the sprue basin sealing and drainage device being flush with the top of the sand box, and molding sand being filled between the sand box, the sprue basin mold, and the sprue basin sealing and drainage device and solidified to form a sprue basin.

[0012] The aforementioned sprue basin manufacturing device uses a cast iron sand box to reinforce the outside of the sprue basin, and the inner cavity of the sprue basin is used to hold the molten iron during pouring.

[0013] The aforementioned sprue basin manufacturing device includes a sprue basin sealing and diversion device located at the sprue opening of the sprue basin, which is fixed around the device by molding sand and sealed to the sprue opening.

[0014] The aforementioned water inlet basin manufacturing device has a water inlet plug placed on top of the drainage hole of the water inlet basin sealing and drainage device, and the water inlet plug and the water inlet basin sealing and drainage device are sealed by grinding.

[0015] The aforementioned water inlet basin making device has a spherical water inlet plug, which is connected to the water inlet plug at one end via a vertical connecting rod. The other end of the connecting rod is an arc-shaped hook that facilitates hand handling and the transmission of grinding force.

[0016] The design concept of this utility model is: The central drainage hole of this sealing and drainage device contacts the sprue plug. Because it is made of molding sand (such as resin sand), it has a certain degree of plasticity and can be ground with the sprue plug to make the bond between them tighter, thus achieving better sealing. When manufacturing the sprue basin, the sealing and drainage device is not limited by location and can be placed anywhere on the sprue mold. It can be adjusted freely according to product requirements, and the number and spacing of the sprue holes can be freely adjusted according to product needs. The shape of this sealing and drainage device fully considers practical production problems, enabling convenient self-production. This sealing and drainage device integrates sealing (leakage prevention) and drainage (controlling molten iron flow) functions into one, preventing molten iron from prematurely entering the mold cavity through a tight seal, reducing defects such as cold shuts and iron pellets from the source, and achieving quality improvement and efficiency optimization.

[0017] Compared with the prior art, the advantages and beneficial effects of this utility model are: 1. This utility model uses molding sand (such as resin sand) instead of ceramic tubes and paper tubes to form more regular round sprue holes, thereby reducing costs.

[0018] 2. The sprue sealing and diversion device of this utility model can be placed at will, without being restricted by the position of the sprue in the casting, and is easy to operate, improving production efficiency. It can be applied to all casting sprue position requirements.

[0019] 3. This utility model uses molding sand (such as resin sand) to effectively fit the arc surface of the sprue plug, increasing the sealing effect of the sprue plug. This ensures that the sprue hole of the sprue basin is tightly sealed during the casting process, preventing molten iron leakage. It effectively prevents molten iron from entering the mold cavity in advance and forming defects such as cold shut iron beads. This reduces the number of iron beads and incomplete pouring in the casting, thereby improving the quality requirements of the casting.

[0020] 4. This utility model is simple to manufacture, and foundries can produce and use it themselves, effectively reducing production costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the water inlet basin sealing and diversion device of this utility model.

[0022] Figure 2 This is a schematic diagram of the installation on the mold of the water inlet basin sealing and diversion device of this utility model.

[0023] Figures 3-4 This is a schematic diagram of the sprue basin after it has been shaped. Figure 3 The water inlet basin sealing and drainage device is not in the water inlet basin state. Figure 4 The state of the water inlet basin sealing and diversion device in the water inlet basin.

[0024] Figure 5This is a schematic diagram of the sealing state of the water inlet basin sealing and diversion device and the water inlet plug after grinding.

[0025] In the diagram: 1-Water inlet basin sealing and diversion device, 2-Water inlet basin mold, 3-Sand baffle, 4-Water inlet basin, 5-Water inlet plug, 6-Drainage hole, 7-Sand box, 8-Water inlet eye, 9-Shaped plate, 10-Connecting rod, 11-Hook. Detailed Implementation

[0026] like Figures 1-5 As shown, this utility model proposes a sealing and guiding device for a casting sprue basin, with the following specific structure: The sealing and guiding device 1 is a structure that matches the shape and size of the sprue eye 8 of the sprue basin 4, and the sprue eye 8 is formed by placing the sealing and guiding device 1 on the sprue basin mold 2. The top and bottom surfaces of the sealing and guiding device 1 are parallel, and a guiding hole 6 is provided in the center. One side of the sealing and guiding device 1 is an arc structure, and the other three sides are planar structures. The arc structure is mainly for the later grinding stage of the sprue plug 5, which facilitates the correction of the concentricity between the sprue plug 5 and the middle sprue eye 8. If all are planar structures, it is not conducive to visual observation. The planar structure is convenient for mold making, and if there are two or more sprue eyes 8, it is convenient to measure the distance and position of the sprue eyes 8. If the arc structure is not conducive to measurement. The thickness of the drainage hole 6 of the water inlet basin sealing drainage device 1 and the outer sand mold should ideally be between 30mm and 50mm. If the thickness is too small, it is easy to cause damage during sand filling, and if it is too thick, it is not conducive to transportation and placement.

[0027] like Figure 2 As shown, when making the sprue basin 4, the sand box 7 is placed on the mold plate 9, and the sprue basin mold 2 is placed in the center of the inner cavity of the sand box 7. The sprue basin sealing and drainage device 1 is placed at the required position on the top of the sprue basin mold 2, with the top of the sprue basin sealing and drainage device 1 flush with the top of the sand box 7. Resin sand is filled between the sand box 7, the sprue basin mold 2, and the sprue basin sealing and drainage device 1. A circular sand-blocking plate 3 is placed at the drainage hole 6 of the sprue basin sealing and drainage device 1 to prevent resin sand from flowing into the drainage hole 6 during filling, which would be inconvenient for later use.

[0028] like Figures 3-4 As shown, after the sand mold hardens, the sand box 7 is flipped over to release the mold, and the sprue basin mold 2 is removed to obtain a complete sprue basin 4. The sprue basin 4 is reinforced with cast iron sand box 7 on the outside, and the inner cavity of the sprue basin 4 is used to hold the molten iron during pouring. The sprue basin sealing and guiding device 1 is located at the sprue eye 8 of the sprue basin 4. It is fixed by resin sand around itself, which has good sealing and stability, and can ensure that it will not loosen during the later grinding stage of the sprue plug 5, and can better fix the sprue plug 5.

[0029] like Figure 5As shown, after confirming that the sprue basin 4 and the sprue basin sealing and guiding device 1 are intact and undamaged, the sprue plug 5 is inserted. The sprue plug 5 is spherical and is connected to the sprue plug 5 at one end by a vertical connecting rod 10. The other end of the connecting rod 10 is an arc-shaped hook 11. The hook shape makes it easy to hold and transmits grinding force through the connecting rod 10, allowing the sprue plug 5 and the sprue basin sealing and guiding device 1 to be fully ground. This ensures a good seal between the sprue basin sealing and guiding device 1 and the sprue plug 5, preventing leakage after the molten iron enters the sprue basin 4 and reducing casting defects caused by leakage. When it is time to pour molten iron, the sprue plug 5 is removed through the connecting rod 10, and the molten iron fills the casting through the guiding hole 6 of the sprue basin sealing and guiding device.

[0030] The results show that this high-reliability casting nozzle sealing and diversion device ensures the sealing performance of the casting nozzle plug, prevents premature leakage of molten iron, reduces the risk of defects, and effectively improves production efficiency and reduces production costs. In mass production, the casting qualification rate is consistently above 98%. This new nozzle sealing and diversion device is simple to manufacture, and its shape fully considers practical production problems, allowing foundries to easily produce and use it themselves.

Claims

1. A casting nozzle pan seal and flow directing device, characterized by, The sprue sealing and drainage device is a structure that matches the shape and size of the sprue opening of the sprue basin. The sprue opening is formed by placing the sprue sealing and drainage device on the sprue basin mold. The top and bottom of the sprue sealing and drainage device are parallel surfaces and a drainage hole is provided in the center. One side of the sprue sealing and drainage device is an arc structure, and the other three sides are flat structures.

2. The casting nozzle pan seal and drain apparatus of claim 1, wherein, The thickness of the drainage hole and the outer sand mold of the water inlet basin sealing drainage device is 30mm~50mm.

3. A sprue manufacturing apparatus using the casting sprue sealing and drainage device as described in claim 1 or 2, characterized in that, The sand box is placed on the mold plate, and the sprue basin mold is placed in the center of the sand box cavity. The sprue basin sealing and drainage device is placed at any desired position on the top of the sprue basin mold. The top of the sprue basin sealing and drainage device is flush with the top of the sand box. Molding sand is filled between the sand box, the sprue basin mold, and the sprue basin sealing and drainage device and solidified to form the sprue basin.

4. The nozzle pan making apparatus according to claim 3, wherein The outside of the sprue basin is reinforced with a cast iron sand box, and the inner cavity of the sprue basin is used to hold the molten iron during pouring.

5. The nozzle pan making apparatus according to claim 3, wherein The sprue sealing and diversion device is located at the sprue opening of the sprue basin, and its surrounding area is fixed by molding sand and sealed with the sprue opening.

6. The water inlet basin manufacturing apparatus according to claim 3, characterized in that, A water inlet plug is placed on top of the drainage hole of the water inlet basin sealing drainage device, and the water inlet plug and the water inlet basin sealing drainage device are sealed by grinding.

7. The nozzle pan making apparatus according to claim 6, wherein The sprue plug is spherical and is connected to the sprue plug at one end via a vertical connecting rod. The other end of the connecting rod is an arc-shaped hook that is easy to hold and transmit grinding force.

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