Rapid cooling and shaping device for aluminum shell after die casting

Abstract

The utility model relates to the technical field of aluminum shell production, in particular to a rapid cooling and shaping device for an aluminum shell after die casting, which comprises a die casting table, a reinforcing plate fixedly connected to the middle of the die casting table, two supporting blocks symmetrically arranged on the reinforcing plate, a cooling function layer arranged on the two supporting blocks, and a heat insulation buffer layer arranged inside the cooling function layer. And a heat conduction layer is arranged in the heat insulation buffer layer. A multi-layer composite cooling cavity composed of a heat conduction layer, a heat conduction cavity and a heat insulation buffer layer is matched with a spiral pipeline in a nested mode, so that a cooling medium can flow in a gradient mode in the multi-layer composite cooling cavity, heat is diffused layer by layer from a central high-temperature area to the periphery, and the flow speed of the cooling medium is dynamically adjusted through the diameter change of the gradually-opened spiral pipeline; after the cooling medium rapidly absorbs heat in the central high-temperature area, the flow speed is slowed down in the peripheral area to fully dissipate heat, the gradient cooling mode can be matched with the heat capacity characteristics of different parts of the aluminum shell, and uneven shrinkage or microdefects caused by too large temperature difference are avoided.

Description

Technical Field

[0001] This utility model relates to the field of aluminum shell production technology, and in particular to a device for rapid cooling and shaping of aluminum shells after die casting. Background Technology

[0002] Aluminum alloys are widely used in many fields due to their excellent casting properties, plastic processing properties, and superior electrical and thermal conductivity. During the die-casting process of aluminum shells, the temperature of the die-cast aluminum shell is relatively high, requiring rapid and uniform cooling and shaping to ensure that its dimensional accuracy, mechanical properties, and surface quality meet the requirements.

[0003] In existing processes for cooling aluminum alloy shells during die casting, such as the "Rapid Demolding Device for Die Casting of Aluminum Alloy Parts" disclosed in patent announcement number CN219632572 U, which improves safety and portability through water tank circulation and manual operation, its cooling module is still based on a single-layer flow design. The single-layer flow cooling chamber has a single medium flow path, resulting in large differences in heat dissipation rates between thick and thin areas of the aluminum shell, which can easily lead to local stress concentration, deformation, or even cracks. At the same time, the straight-through or simple circulation channel design results in short contact time between the cooling medium and the mold, limited effective heat transfer area, and no fundamental improvement in heat conduction efficiency and uniformity. This makes it difficult to meet the rapid shaping requirements of high-precision aluminum shell die castings, thereby reducing the working efficiency of aluminum shell cooling and shaping. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rapid cooling and shaping device for aluminum shells after die casting.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A rapid cooling and shaping device for die-cast aluminum shells includes a die-casting table. A reinforcing plate is fixedly connected to the middle of the die-casting table. Two support blocks are symmetrically arranged on the reinforcing plate. A cooling layer is provided on the two support blocks. A heat insulation buffer layer is provided inside the cooling layer. A heat-conducting layer is provided inside the heat insulation buffer layer. A mold groove is opened at the bottom of the heat-conducting layer. A die-cast aluminum shell is placed in the mold groove. The heat-conducting layer, the heat insulation buffer layer, and the cooling layer together form a multi-layer composite cooling cavity.

[0007] A honeycomb-shaped heat-conducting cavity is provided between the heat insulation buffer layer and the heat-conducting layer. A cooling coil is provided on the inner wall of the cooling layer. A U-shaped connecting pipe is connected to the end of the cooling coil. One end of the U-shaped connecting pipe is connected to an involute spiral pipe.

[0008] Preferably, two sets of fixed columns are fixedly connected to the die-casting platform, and a support plate is provided on the two sets of fixed columns. The outer wall of the support plate is fixedly connected to a support column through a connecting rod, and a cooling box is provided on the top of the support column.

[0009] A flow plate is fixedly connected to one side of the cooling box, and the flow plate is in communication with the interior of the cooling box. The end of the spiral pipe away from the U-shaped connecting pipe extends into the interior of the flow plate, and a circulation pump is provided at the end of the spiral pipe near the cooling box.

[0010] Preferably, a support column is fixedly connected to the die-casting platform, a horizontal plate is fixedly connected to the top of the support column, an electric hydraulic cylinder is provided on the horizontal plate, the output end of the electric hydraulic cylinder passes through the horizontal plate and is connected to a lifting platform, the lifting platform is movably connected to the support column through sliding bushings around its perimeter, a moving mold is fixedly connected to the bottom of the lifting platform, a limit rod is fixedly connected to the top of the moving mold, and a movable hole is provided on the lifting platform for the limit rod to move.

[0011] Preferably, the bottom of the die-casting platform is fixedly connected to a mounting plate by a support rod. The mounting plate is provided with an ejector cylinder. The output end of the ejector cylinder passes through the die-casting platform and extends to the inner bottom of the heat-conducting layer and is connected to a pad. Several ejector pins are fixedly connected to the pad, and the ends of the ejector pins abut against the bottom of the die-cast aluminum shell.

[0012] Preferably, a coolant tank is provided on one side of the die-casting platform, and a water outlet is provided on one side of the coolant tank. The water outlet is connected to an output pipe, one end of which extends into the interior of the heat-conducting layer. A water pump is provided on the side of the output pipe near the coolant tank.

[0013] The beneficial effects of this utility model are:

[0014] The multi-layered composite cooling cavity, consisting of a heat-conducting layer, a heat-conducting cavity, and a heat-insulating buffer layer, combined with the nested spiral pipes, allows the cooling medium to form a gradient flow within the multi-layered composite cooling cavity. Heat is diffused layer by layer from the central high-temperature zone to the periphery. The gradually opening spiral pipe diameter changes allow for dynamic adjustment of the cooling medium flow rate. After the cooling medium rapidly absorbs heat in the central high-temperature zone, the flow rate slows down in the peripheral area to fully dissipate heat. This gradient cooling mode can match the thermal capacity characteristics of different parts of the aluminum shell (such as slow cooling in thick-walled areas and rapid cooling in thin-walled areas), avoiding uneven shrinkage or microscopic defects caused by excessive temperature differences. It achieves uniform heat dissipation from the inside to the outside of the die-cast aluminum shell, effectively avoiding the problems of local stress concentration, deformation, and cracking caused by the single flow path in traditional single-layer cooling cavities, and meeting the rapid shaping requirements of high-precision aluminum shell die-castings.

[0015] By using a spiral nested channel composed of spiral pipes and U-shaped connecting pipes, the contact time between the cooling medium and the heat-conducting cavity is extended, the effective heat transfer area is expanded, and the coolant is driven by a water pump to flow in the heat-conducting layer, directly absorbing the heat on the surface of the aluminum shell, realizing the synergistic heat dissipation of "internal cooling + external cooling", significantly improving the overall heat dissipation rate and reducing energy consumption costs.

[0016] By placing the aluminum shell in the fixed mold slot and cooperating with the moving mold driven by the electric hydraulic cylinder, the die casting and cooling are integrated, ensuring that the aluminum shell can quickly enter the cooling stage after die casting. At the same time, with the ejection mechanism consisting of the ejection cylinder, pad, and ejector pin, the aluminum shell can be quickly ejected after cooling and solidification, shortening the part removal time and reducing the idle cycle of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a rapid cooling and shaping device for aluminum shell die casting proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the connection structure between the electric hydraulic cylinder and the multi-layer composite cooling chamber of a rapid cooling and shaping device for aluminum shell die casting proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the connection structure between the cooling box and the multi-layer composite cooling cavity of a rapid cooling and shaping device for aluminum shell die casting proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of the connection structure between the mounting plate and the multi-layer composite cooling cavity of a rapid cooling and shaping device for aluminum shell die casting proposed in this utility model.

[0021] Figure 5 This is an exploded view of the multi-layer composite cooling chamber structure of a rapid cooling and shaping device for aluminum shell die casting proposed in this utility model.

[0022] Figure 6 This is a schematic diagram of the connection structure between the mounting plate and the ejector pin of a rapid cooling and shaping device for die-casting aluminum shells proposed in this utility model.

[0023] In the picture:

[0024] 1. Die-casting platform; 2. Reinforcing plate; 3. Support block; 4. Cooling layer; 401. Heat insulation buffer layer; 402. Heat-conducting layer; 403. Die-cast aluminum shell; 404. Heat-conducting cavity; 5. Cooling coil; 501. U-shaped connecting pipe; 502. Spiral pipe; 503. Circulating pump; 6. Fixed column; 601. Support plate; 602. Connecting rod; 603. Support column; 604. Cooling box; 605. Flow plate; 7. Support column; 701. Horizontal plate; 702. Electric hydraulic cylinder; 703. Lifting platform; 704. Moving mold; 705. Limiting rod; 8. Mounting plate; 801. Ejector cylinder; 802. Pad plate; 803. Ejector pin; 9. Coolant tank; 901. Output pipe; 902. Water pump. Detailed Implementation

[0025] 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.

[0026] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0027] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0028] Example:

[0029] Reference Figures 1-6 A rapid cooling and shaping device for die-cast aluminum shells includes a die-casting table 1, a reinforcing plate 2 fixedly connected to the middle of the die-casting table 1, two support blocks 3 symmetrically arranged on the reinforcing plate 2, a cooling layer 4 arranged on the two support blocks 3, a heat insulation buffer layer 401 arranged inside the cooling layer 4, a heat conduction layer 402 arranged inside the heat insulation buffer layer 401, a fixed mold groove is opened at the bottom of the heat conduction layer 402, and a die-cast aluminum shell 403 is placed in the fixed mold groove. The heat conduction layer 402, the heat insulation buffer layer 401, and the cooling layer 4 together form a multi-layer composite cooling cavity.

[0030] A honeycomb-shaped heat-conducting cavity 404 is provided between the heat insulation buffer layer 401 and the heat-conducting layer 402. A cooling coil 5 is provided on the inner wall of the cooling layer 4. A U-shaped connecting pipe 501 is connected to the end of the cooling coil 5. One end of the U-shaped connecting pipe 501 is connected to an involute spiral pipe 502.

[0031] Two sets of fixed columns 6 are fixedly connected to the die-casting table 1. A support plate 601 is provided on the two sets of fixed columns 6. A support column 603 is fixedly connected to the outer wall of the support plate 601 through a connecting rod 602. A cooling box 604 is provided on the top of the support column 603.

[0032] A flow plate 605 is fixedly connected to one side of the cooling box 604. The flow plate 605 is connected to the interior of the cooling box 604. The end of the spiral pipe 502 away from the U-shaped connecting pipe 501 extends into the interior of the flow plate 605. A circulation pump 503 is provided at the end of the spiral pipe 502 near the cooling box 604.

[0033] A support rod 7 is fixedly connected to the die-casting table 1. A horizontal plate 701 is fixedly connected to the top of the support rod 7. An electric hydraulic cylinder 702 is installed on the horizontal plate 701. The output end of the electric hydraulic cylinder 702 passes through the horizontal plate 701 and is connected to a lifting platform 703. The lifting platform 703 is movably connected to the support rod 7 through sliding bushings. A movable mold 704 is fixedly connected to the bottom of the lifting platform 703. A limit rod 705 is fixedly connected to the top of the movable mold 704. The lifting platform 703 has movable holes for the limit rod 705 to move.

[0034] The bottom of the die-casting table 1 is fixedly connected to a mounting plate 8 by a support rod. An ejector cylinder 801 is provided on the mounting plate 8. The output end of the ejector cylinder 801 passes through the die-casting table 1 and extends to the inner bottom of the heat-conducting layer 402 and is connected to a pad 802. Several ejector pins 803 are fixedly connected on the pad 802. The ends of the ejector pins 803 abut against the bottom of the die-cast aluminum shell 403.

[0035] A coolant tank 9 is provided on one side of the die-casting platform 1. A water outlet is provided on one side of the coolant tank 9. The water outlet is connected to an output pipe 901. One end of the output pipe 901 extends into the interior of the heat-conducting layer 402. A water pump 902 is provided on the side of the output pipe 901 near the coolant tank 9.

[0036] In this embodiment, when the die-cast aluminum shell 403 needs to be die-cast and shaped, the die-cast aluminum shell 403 is first placed in the fixed mold groove at the bottom of the heat-conducting layer 402. Then, the electric hydraulic cylinder 702 is started. When the electric hydraulic cylinder 702 runs, it drives the lifting platform 703 to slide down along the support rod 7. When the lifting platform 703 moves down, it drives the moving mold 704 to move down. When the moving mold 704 moves down to the surface of the die-cast aluminum shell 403, the die-cast aluminum shell 403 can be die-cast by continuous downward pressure. After the die-cast aluminum shell 403 is formed, the moving mold 704 is disengaged from the surface of the die-cast aluminum shell 403 by reversing the electric hydraulic cylinder 702.

[0037] Specifically, when the die-cast aluminum shell 403 is die-cast, its surface is covered with a large amount of heat. At this time, the circulation pump 503 is started. The operation of the circulation pump 503 causes the cooling medium in the cooling tank 604 to flow out through the flow plate 605, and then sequentially through the spiral pipe 502 and the U-shaped connecting pipe 501 to the cooling coil 5. When the cooling medium flows in the cooling coil 5, it allows the cooling medium to flow evenly along the cavity wall of the multi-layer composite cooling chamber. At this time, the heat on the surface of the die-cast aluminum shell 403 is conducted to each heat-conducting cavity 404 through the heat-conducting layer 402. The cooling medium diffuses within the heat-conducting cavity 404. As the cooling medium flows, it exchanges heat with the cavity wall of the heat-conducting cavity 404 and continuously carries away heat. Subsequently, the heat is transferred from the heat-conducting cavity 404 to the heat-insulating buffer layer 401. The heat-insulating buffer layer 401 prevents the heat from dissipating to the external environment, so that the heat is mainly concentrated in the multi-layer composite cooling cavity. When the cooling medium flows along the cooling coil 5 in the inner wall of the cooling action layer 4, it exchanges heat with the heat transferred from the heat-insulating buffer layer 401, thereby further carrying away heat, so that the die-cast aluminum shell 403 is cooled quickly and evenly.

[0038] Furthermore, when the cooling medium enters the multi-layer composite cooling chamber from the spiral pipe 502 through the U-shaped connecting pipe 501, the cooling medium rapidly absorbs a large amount of heat as one side of the spiral pipe 502 is close to the high-temperature central area of ​​the die-cast aluminum shell 403. As the cooling medium flows inside the spiral pipe 502, it gradually transfers to the outer spiral pipe 502. As the diameter of the outer spiral pipe 502 gradually increases, the flow rate of the cooling medium slows down, and it exchanges heat with the outer area of ​​the cooling layer 4, thereby further dissipating the heat. Because the cooling medium flows in spiral pipes 502 of different diameters, gradient cooling of the die-cast aluminum shell 403 from the center to the periphery is achieved, effectively controlling the temperature and avoiding stress and deformation caused by uneven cooling of the die-cast aluminum shell 403.

[0039] Furthermore, when the cooling medium flows through the cavity wall of the multi-layer composite cooling chamber to cool and shape the die-cast aluminum shell 403, the water pump 902 is started. When the water pump 902 runs, the coolant inside the coolant tank 9 flows out from the outlet end and through the output pipe 901 to the interior of the heat-conducting layer 402, thereby further absorbing the heat on the surface of the die-cast aluminum shell 403 and carrying away the heat absorbed by the heat-conducting layer 402. This ensures that the overall surface of the die-cast aluminum shell 403 is cooled evenly and the quality of cooling and shaping is achieved, realizing the synergistic effect of "internal cooling + external cooling" on the die-cast aluminum shell 403.

[0040] Furthermore, after the die-cast aluminum shell 403 has cooled and solidified, the ejector cylinder 801 is activated. When the ejector cylinder 801 is running, it drives the pad 802 and the ejector pin 803 to move upward. When the ejector pin 803 moves upward, it can eject the solidified die-cast aluminum shell 403 into the multi-layer composite cooling chamber, so that the die-cast aluminum shell 403 can be processed in subsequent steps.

[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 are not intended to indicate or imply that the device or component 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.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for rapid cooling and shaping of aluminum shells after die casting, comprising a die casting table (1), characterized in that, A reinforcing plate (2) is fixedly connected to the middle of the die-casting platform (1). Two support blocks (3) are symmetrically arranged on the reinforcing plate (2). A cooling layer (4) is arranged on the two support blocks (3). A heat insulation buffer layer (401) is arranged inside the cooling layer (4). A heat conduction layer (402) is arranged inside the heat insulation buffer layer (401). A fixed mold groove is opened at the bottom of the heat conduction layer (402). A die-cast aluminum shell (403) is placed in the fixed mold groove. The heat conduction layer (402), the heat insulation buffer layer (401), and the cooling layer (4) together form a multi-layer composite cooling cavity. A honeycomb-shaped heat-conducting cavity (404) is provided between the heat insulation buffer layer (401) and the heat-conducting layer (402). A cooling coil (5) is provided on the inner wall of the cooling layer (4). A U-shaped connecting pipe (501) is connected to the end of the cooling coil (5). One end of the U-shaped connecting pipe (501) is connected to an involute spiral pipe (502).

2. The rapid cooling and shaping device for aluminum shell die casting according to claim 1, characterized in that, Two sets of fixed columns (6) are fixedly connected to the die-casting table (1). A support plate (601) is provided on the two sets of fixed columns (6). A support column (603) is fixedly connected to the outer wall of the support plate (601) through a connecting rod (602). A cooling box (604) is provided on the top of the support column (603). A flow plate (605) is fixedly connected to one side of the cooling box (604). The flow plate (605) communicates with the interior of the cooling box (604). The end of the spiral pipe (502) away from the U-shaped connecting pipe (501) extends into the interior of the flow plate (605). A circulation pump (503) is provided at the end of the spiral pipe (502) near the cooling box (604).

3. The rapid cooling and shaping device for aluminum shell die casting according to claim 1, characterized in that, A support rod (7) is fixedly connected to the die-casting table (1). A horizontal plate (701) is fixedly connected to the top of the support rod (7). An electric hydraulic cylinder (702) is provided on the horizontal plate (701). The output end of the electric hydraulic cylinder (702) passes through the horizontal plate (701) and is connected to a lifting platform (703). The lifting platform (703) is movably connected to the support rod (7) around its perimeter through sliding bushings. A moving mold (704) is fixedly connected to the bottom of the lifting platform (703). A limit rod (705) is fixedly connected to the top of the moving mold (704). An movable hole is provided on the lifting platform (703) for the limit rod (705) to move.

4. The rapid cooling and shaping device for aluminum shell die casting according to claim 1, characterized in that, The bottom of the die-casting table (1) is fixedly connected to a mounting plate (8) by a support rod. The mounting plate (8) is provided with an ejector cylinder (801). The output end of the ejector cylinder (801) passes through the die-casting table (1) and extends to the inner bottom of the heat-conducting layer (402) and is connected to a pad (802). Several ejector pins (803) are fixedly connected to the pad (802). The ends of the ejector pins (803) abut against the bottom of the die-cast aluminum shell (403).

5. The rapid cooling and shaping device for aluminum shell die casting according to claim 1, characterized in that, A coolant tank (9) is provided on one side of the die-casting platform (1). A water outlet is provided on one side of the coolant tank (9). The water outlet is connected to an output pipe (901). One end of the output pipe (901) extends into the interior of the heat-conducting layer (402). A water pump (902) is provided on the side of the output pipe (901) near the coolant tank (9).

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