A dummy head for casting aluminum

Abstract

The utility model discloses a kind of dummy bar heads for casting aluminium, including dummy bar head main part and connecting rod, the dummy bar head main part is cylindrical structure, the dummy bar head main part inside is equipped with baffle, and baffle divides dummy bar head main part into upper cavity and lower cavity.The utility model is by adopting guide block, spring, plugging block, outer sealing sheet, when using guide block, since guide block and outer sealing sheet are fastened using bolt, thus when wear occurs, damaged guide block can be promptly disassembled and replaced by disassembling bolt, simultaneously, guide block is connected with adjusting groove by plugging block and spring, when wear occurs, guide block can be driven to move outward by the ejection of the deformation of spring, to make guide block continue to contact with crystallizer surface, continuously form guiding operation, avoid sealing failure caused by serious wear, ensure the use quality of structure, with the advantages of dummy bar guiding, good guiding effect, easy to maintain.

Description

Technical Field

[0001] This utility model relates to the field of ingot drawing head technology, specifically, to an ingot drawing head for aluminum casting. Background Technology

[0002] The dummy bar is used in conjunction with the crystallizer to form the cavity for forming the aluminum rod during aluminum alloy casting. The dummy bar is fixed on the power unit and raised and lowered to enlarge the cavity and complete the casting of the aluminum rod. After the aluminum rod is cast, the dummy bar needs to rise and cooperate with the crystallizer. Since the dummy bar has lateral displacement during the casting process, its relative position with the crystallizer may change after it rises and falls.

[0003] The existing publicly available technology, patent number CN202322838903.4, features an automatic hollow dummy head with a guiding structure. This effectively solves the problem of deviation that easily occurs when there is no guide between the dummy head and the crystallizer. It is simple, ingenious, and easy to use. The dummy head is equipped with a guiding structure, which facilitates the guidance between the dummy head and the crystallizer. This allows the dummy head to be positioned and coordinated with the crystallizer when it rises, ensuring that the relative positions of the dummy head and the crystallizer remain consistent, thereby improving casting quality and casting efficiency.

[0004] However, the above-mentioned patent still has certain drawbacks in use: the fixed guide block cannot be replaced or replenished in time when wear occurs, which leads to sealing failure and reduced structural flexibility. At the same time, it cannot be maintained or replaced very flexibly, which reduces the effectiveness of the structure.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a casting ingot head that has the advantages of good ingot guiding, good guiding effect, and easy maintenance, thereby solving the problems mentioned in the background technology.

[0007] To achieve the advantages of good ingot guiding, good guiding effect, and easy maintenance, the specific technical solution adopted by this utility model is as follows: A casting ingot head includes an ingot head body and a connecting rod. The ingot head body is cylindrical and has an internal partition that divides it into an upper cavity and a lower cavity. A frustum is located above the upper cavity, and the connecting rod is located in the middle of the lower cavity. An outer edge extends outward from the upper edge of the ingot head body, and several sets of reinforcing ribs are welded around the surface of the outer edge. Multiple guide blocks are evenly distributed below the outer edge. The lower part of each guide block is a cuboid structure, and the upper part is a triangular block structure. An outer sealing plate is fastened to one end of each guide block by bolts. A sealing block is welded to one end of the outer sealing plate, and an inner sealing plate is welded to one end of the sealing block. An adjustment groove is formed on the outer periphery of the sealing block and the inner sealing plate inside the ingot head body. A spring is installed inside the adjustment groove and is fixedly connected to the inner wall of the adjustment groove and the surface of the inner sealing plate.

[0008] Furthermore, the lower surface of the upper cavity is a basin-shaped structure that is low in the middle and high around the edges, and the truncated cone is a boss-shaped structure that is thinner at the top and thicker at the bottom.

[0009] Furthermore, the outer edge extends beyond the edge of the ingot head body.

[0010] Furthermore, the connecting rod is a threaded rod.

[0011] Furthermore, a cooling pipe is installed at the bottom of the lower cavity, with both ends of the cooling pipe penetrating the bottom sides of the lower cavity, and the cooling pipe has a disc-shaped structure.

[0012] Furthermore, the dimensions of both the outer and inner sealing plates are larger than the dimensions of the inlet and outlet areas of the adjusting groove.

[0013] Furthermore, the size of the sealing block is the same as the size of the inlet and outlet areas of the regulating channel.

[0014] Furthermore, the cooling pipe is connected to an external cooling water source.

[0015] Compared with the prior art, this utility model provides a casting ingot head for aluminum casting, which has the following beneficial effects: This utility model employs a guide block, a spring, a sealing block, and an outer sealing plate. During use, the guide block and the outer sealing plate are fastened with bolts. Therefore, when wear occurs, the damaged guide block can be promptly removed and replaced by unscrewing the bolts. Simultaneously, the guide block is connected to the adjusting groove via the sealing block and the spring. When wear occurs, the deformation of the spring pushes the sealing block outward, allowing the guide block to continue contact with the crystallizer surface, maintaining continuous guiding operation and preventing severe wear that could lead to sealing failure. This ensures the structural quality and offers advantages such as ingot guiding, good guiding effect, and easy maintenance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a casting ingot head for aluminum production proposed in this utility model; Figure 2 This is a schematic diagram of the internal structure of the main body of the ingot head of this utility model; Figure 3 This is a schematic diagram of the cooling pipe structure of this utility model; Figure 4 This is a schematic diagram showing the connection between the outer sealing sheet and the inner sealing sheet of this utility model.

[0018] In the picture: 1. Main body of the ingot head; 2. Outer sealing plate; 3. Outer edge; 4. Reinforcing rib; 5. Upper cavity; 6. Frustum; 7. Guide block; 8. Connecting rod; 9. Sealing block; 10. Spring; 11. Inner sealing plate; 12. Adjustment groove; 13. Lower cavity; 14. Cooling pipe. Detailed Implementation

[0019] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0020] According to an embodiment of the present invention, a casting ingot head for aluminum casting is provided.

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4As shown, a casting ingot head according to an embodiment of the present invention includes an ingot head body 1 and a connecting rod 8. The ingot head body 1 is a cylindrical structure. A partition is provided inside the ingot head body 1, which divides the interior of the ingot head body 1 into an upper cavity 5 and a lower cavity 13. A frustum 6 is provided above the upper cavity 5, and a connecting rod 8 is provided in the middle of the lower cavity 13. An outer edge 3 extends outward from the upper edge of the outer side of the ingot head body 1. Several sets of reinforcing ribs 4 are welded around the surface of the outer edge 3. Multiple guide blocks 7 are evenly distributed below the outer edge 3. The lower part of the guide block 7 is a cuboid structure, and the upper part is a triangular block structure. An outer sealing plate 2 is fastened to one end of the guide block 7 by bolts. A sealing block 9 is welded to one end of the outer sealing plate 2, and an inner sealing plate 11 is welded to one end of the sealing block 9. An adjustment groove 12 is opened on the outer periphery of the sealing block 9 and the inner sealing plate 11 inside the ingot head body 1. A spring 10 is installed inside the groove 12, and the spring 10 is fixedly connected to the inner wall of the adjusting groove 12 and the surface of the inner sealing plate 11. The main body 1 of the ingot head adopts a cylindrical structure to form a reference surface for mating with the crystallizer. Its internal partition divides the cavity into an upper cavity 5 and a lower cavity 13. The basin-shaped bottom surface of the upper cavity 5, together with the boss structure of the frustum 6, forms a gradient solidification area for the aluminum liquid. The outer edge 3 extends outward to form a contact plane with the crystallizer. The reinforcing ribs 4 arranged around it strengthen the rigidity of the edge structure. The guide block 7 provides an installation reference surface through the lower cuboid section, and the upper triangular block forms a progressive guide surface. The bolted outer sealing plate 2 enables quick replacement of worn parts. The sealing block 9 and the adjusting groove 12 form a dynamic sealing assembly. The spring 10 provides continuous clamping force so that the inner sealing plate 11 automatically compensates for displacement with wear, maintaining a constant contact pressure between the guide block 7 and the crystallizer.

[0022] In one embodiment, the lower surface of the upper cavity 5 is a basin-shaped structure with a low center and high periphery, and the truncated cone 6 is a boss-shaped structure with a thinner top and a thicker bottom. The basin-shaped bottom surface of the upper cavity 5 has an inclination angle of 5-15°. Combined with the truncated cone 6, the 3:1 tapered design forms a radial flow channel for the molten aluminum, so that the molten aluminum forms a directional crystallization structure from the center to the edge during the solidification process, thereby improving the density of the ingot.

[0023] In one embodiment, the outer edge 3 extends beyond the edge of the main body 1 of the ingot head, and the outer edge 3 extends 5-10mm beyond the edge of the main body to form a stepped sealing surface. Its lower surface is machined with a flatness tolerance of 0.1-0.3mm to ensure that a metal-to-metal contact seal is formed with the upper edge of the crystallizer.

[0024] In one embodiment, the connecting rod 8 is a threaded rod with an M30×2 fine thread structure. The surface of the rod is nitrided to form a hardened layer of ≥0.5mm. A stress relief groove is provided at the root of the thread to improve fatigue resistance.

[0025] In one embodiment, a cooling pipe 14 is installed at the bottom of the lower cavity 13, and the two ends of the cooling pipe 14 pass through the bottom sides of the lower cavity 13 respectively. The cooling pipe 14 has a disc-shaped structure and is connected to cooling water. Cooling water is introduced into the partition to cool the partition, accelerate the cooling of the aluminum rod, and facilitate demolding.

[0026] In one embodiment, the dimensions of the outer sealing plate 2 and the inner sealing plate 11 are both larger than the dimensions of the inlet and outlet areas of the adjusting groove 12. The outer sealing plate 2 and the inner sealing plate 11 are designed with an interference fit, and their radial dimensions are 0.5-1mm larger than the adjusting groove 12, forming a double mechanical seal barrier to prevent molten aluminum from seeping into the adjusting mechanism.

[0027] In one embodiment, the size of the sealing block 9 is the same as the size of the inlet and outlet areas of the regulating groove 12. The fitting gap between the sealing block 9 and the regulating groove 12 is controlled at 0.05-0.1mm. The surface is plated with a 0.02mm hard chrome layer, which ensures smooth sliding and prevents high-temperature oxidation and adhesion.

[0028] In one embodiment, the cooling pipe 14 is connected to an external cooling water source. The inlet end of the cooling pipe 14 is connected to a pressure-compensated constant flow valve, and the outlet end is equipped with a temperature sensor. Precise cooling control with an inlet and outlet water temperature difference of ≤5℃ is achieved through PID control.

[0029] Working principle: In actual use, the main body 1 of the derrick head is connected to the power device (such as the derrick rod). At this time, the connecting rod 8 is fixed to the power device with screws. The power device drives the derrick head to rise and fall. When the derrick head rises and contacts the crystallizer, the guide block 7 and the crystallizer generate a guiding effect, so that the derrick head and the crystallizer can be aligned, ensuring the accuracy and consistency of the position. Then, the outer edge 3 contacts the crystallizer, and the upper cavity 5 forms a cavity with the crystallizer for the forming of aluminum rods. When the aluminum liquid flows into the upper cavity 5, it contacts the upper surface of the upper cavity 5 and the frustum 6 to cool and solidify. Then, the derrick head moves down, so that the distance between the main body 1 of the derrick head and the crystallizer is reduced. As the distance increases, the aluminum rod continues to form. When the guide block 7 is used, it is fastened to the outer sealing plate 2 with bolts. Therefore, when wear occurs, the damaged guide block 7 can be removed and replaced in time by unscrewing the bolts. At the same time, the guide block 7 is connected to the adjusting groove 12 through the sealing block 9 and the spring 10. When wear occurs, the deformation of the spring 10 can push the sealing block 9 to move outward, so that the guide block 7 continues to contact the crystallizer surface and continuously form a guiding operation, avoiding severe wear that causes sealing failure, ensuring the quality of the structure. The device as a whole has the advantages of ingot guiding, good guiding effect, and easy maintenance.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A casting ingot head for aluminum casting, comprising a casting ingot head body (1) and a connecting rod (8), characterized in that, The main body (1) of the ingot head is cylindrical. The main body (1) of the ingot head is equipped with a partition, which divides the interior of the main body (1) into an upper cavity (5) and a lower cavity (13). A frustum (6) is provided above the upper cavity (5), and a connecting rod (8) is provided in the middle of the lower cavity (13). An outer edge (3) extends outward from the upper edge of the main body (1). Several sets of reinforcing ribs (4) are welded around the surface of the outer edge (3). Multiple guide blocks (7) are evenly distributed below the outer edge (3). The lower part of the guide block (7) is rectangular. The structure is a body structure, and the upper part is a triangular block structure. One end of the guide block (7) is fastened to an outer sealing plate (2) by bolts. One end of the outer sealing plate (2) is welded to a sealing block (9). One end of the sealing block (9) is welded to an inner sealing plate (11). The sealing block (9) and the inner sealing plate (11) are located on the outer periphery of the spindle head body (1) and an adjustment groove (12) is opened inside the adjustment groove (12). A spring (10) is installed inside the adjustment groove (12) and the spring (10) is fixedly connected to the inner wall of the adjustment groove (12) and the surface of the inner sealing plate (11).

2. The dummy ingot head for aluminum casting according to claim 1, characterized in that, The lower surface of the upper cavity (5) is a basin-shaped structure with a low center and high sides, and the truncated cone (6) is a boss-shaped structure with a thinner top and a thicker bottom.

3. The ingot derrick for aluminum casting according to claim 1, characterized in that, The outer edge (3) extends beyond the edge of the ingot head body (1).

4. The dummy ingot head for aluminum casting according to claim 1, characterized in that, The connecting rod (8) is a threaded rod.

5. A casting ingot head for aluminum casting according to claim 1, characterized in that, A cooling pipe (14) is installed at the bottom of the lower cavity (13), and the two ends of the cooling pipe (14) pass through the bottom sides of the lower cavity (13) respectively. The cooling pipe (14) has a disc-shaped structure.

6. The dummy ingot head for aluminum casting according to claim 1, characterized in that, The dimensions of the outer sealing plate (2) and the inner sealing plate (11) are both larger than the dimensions of the inlet and outlet areas of the adjusting groove (12).

7. The dummy ingot head for aluminum casting according to claim 1, characterized in that, The dimensions of the sealing block (9) are the same as the dimensions of the inlet and outlet areas of the regulating groove (12).

8. A casting ingot head for aluminum casting according to claim 5, characterized in that, The cooling pipe (14) is connected to an external cooling water source.

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