Cleaning device for low-pressure casting crucibles of aluminum alloy castings

Abstract

This utility model relates to a cleaning device for a low-pressure casting crucible for aluminum alloy castings, comprising: a low-pressure pouring platform; a bottom mold, fixedly mounted on the low-pressure pouring platform, with an upwardly protruding sprue platform at the center of the bottom mold, and a first lead screw platform and a second lead screw platform respectively mounted on opposite sides of the bottom mold; a rotating moving component, with a rotating moving component mounted on either the first or second lead screw platform; a first side mold and a second side mold, vertically and oppositely arranged, connected to the rotating moving component, the relative positions of the first and second side molds being changed by the movement of the two rotating moving components; and a riser pipe, with the sprue platform connected downwards to the riser pipe, extending downwards to near the bottom of the low-pressure casting crucible for draining the molten aluminum to be cleaned from the crucible. The cleaning device according to this utility model can efficiently clean the remaining material in the crucible, reduce manual labor intensity, and avoid safety hazards.

Description

Technical Field

[0001] This utility model relates to the field of casting equipment technology, and more specifically, to a cleaning device for a crucible used in low-pressure casting of aluminum alloy castings. Background Technology

[0002] In modern industrial manufacturing, especially in the automotive, aerospace, and high-end equipment manufacturing industries, low-pressure casting of aluminum alloys has become one of the preferred technologies for producing high-quality, complex, thin-walled aluminum alloy castings due to its advantages such as stable mold filling, good directional solidification and feeding effect, high metal utilization rate, and ease of automation. In low-pressure casting, retaining a certain amount of molten metal at the bottom of the riser pipe (also known as the pouring pipe or ascender pipe) is a key measure to ensure process stability and casting quality. Its main functions are as follows: First, it maintains the temperature gradient during low-pressure casting, preventing solidification blockage. The retained material acts as a heat source, slowing down the cooling rate of the molten metal at the bottom of the riser pipe and preventing premature solidification at the pipe opening. If completely emptied, cold air may enter the riser pipe, causing poor flow or blockage of molten metal during the next pour. Secondly, it reduces oxidation and inclusions. Leaving a bottom layer of molten metal to cover the bottom of the riser tube reduces contact between the molten metal and air, thus decreasing the formation of oxide slag. If the bottom layer is completely emptied, air is easily drawn in during the initial pouring stage, leading to porosity or inclusion defects in the casting. Simultaneously, the residual molten metal at the bottom can absorb oxides or impurities from the inner wall of the riser tube, preventing them from entering the mold cavity and contaminating the casting. Thirdly, it enhances process continuity and efficiency. Leaving a bottom layer allows for a quick start to the next pouring without reheating the riser tube, improving production efficiency. Fourthly, it controls pouring quality. If there is no bottom layer in the riser tube during the initial pouring, the low-temperature molten metal may have poor fluidity, leading to incomplete filling, cold shuts, or insufficient pouring.

[0003] After casting, the bottom material at the bottom of the crucible needs to be poured out and synthesized into aluminum ingots for crucible cleaning and subsequent casting of other grades of aluminum alloy castings. However, due to the limitations of the casting furnace structure, such as... Figure 1 As shown, the crucible body does not have a structure designed for tipping over and pouring molten aluminum. The traditional method for cleaning the crucible bottom material is for the casting operator to open the furnace lid after casting and use a long-handled ladle to scoop the crucible bottom material into the ingot mold. Taking a standard crucible with a volume of 800 kg as an example, the reserved bottom material is generally 100 kg to 150 kg. This method greatly increases the labor intensity of the operator. Moreover, since the furnace lid has been opened during the aluminum scooping process, there is high-temperature molten aluminum in the crucible, which may pose a safety hazard during the operation.

[0004] Therefore, there is an urgent need to develop a low-pressure casting crucible cleaning device for aluminum alloy castings, which can efficiently clean the remaining bottom material in the crucible, reduce the intensity of manual labor, and avoid safety hazards. Summary of the Invention

[0005] The technical problem to be solved by this utility model is how to efficiently clean the remaining bottom material in the low-pressure casting crucible of aluminum alloy castings, reduce the intensity of manual labor, and avoid safety hazards.

[0006] To solve the above-mentioned technical problems, this utility model provides a cleaning device for a low-pressure casting crucible for aluminum alloy castings. The low-pressure casting crucible has an opening at the top, and the cleaning device is set on the top of the low-pressure casting crucible. It includes: a low-pressure pouring platform, set on the opening at the top of the low-pressure casting crucible, for supporting the entire cleaning device; a bottom mold, fixedly set on the low-pressure pouring platform, with an upwardly protruding sprue platform at the center of the bottom mold, and a first lead screw platform and a second lead screw platform respectively set on opposite sides of the bottom mold; and a rotating moving component, with a rotating moving component installed on both the first and second lead screw platforms. On a lead screw platform or a second lead screw platform; a first side mold and a second side mold, the first side mold and the second side mold are vertically arranged and opposite to each other, the first side mold and the second side mold are respectively connected to a rotating moving part, the relative position of the first side mold and the second side mold is changed by the movement of the two rotating moving parts; a riser pipe, the gating platform is connected downward to the riser pipe, the riser pipe extends downward to near the bottom of the low pressure casting crucible, wherein, when the low pressure casting crucible needs to be cleaned, the first side mold and the second side mold are moved and brought together by the rotating moving part to form a pouring space connected to the gating platform, the aluminum liquid at the bottom of the low pressure casting crucible rises through the riser pipe, enters the pouring space through the gating platform, and after forming an aluminum ingot, it can be taken out.

[0007] According to an embodiment of this utility model, the distance between the riser tube and the bottom of the crucible can be in the range of 5mm to 10mm. Further, the distance between the riser tube and the bottom of the crucible can be 6mm to 8mm.

[0008] According to an embodiment of the present invention, the rotating moving component may include a lead screw, a lead screw shaft, and a rotating rod. The lead screw shaft is disposed in a first lead screw platform or a second lead screw platform, and rotating rods are disposed at both ends of the lead screw shaft to reduce the force required to rotate the lead screw shaft by means of a lever. One end of the lead screw is fixedly connected to a first side mold or a second side mold, and the other end is perpendicularly connected to the lead screw by a thread, thereby forming a displacement perpendicular to the lead screw shaft when the lead screw shaft rotates.

[0009] According to an embodiment of this utility model, a side mold slide rail can be provided on the bottom mold to support the first side mold and the second side mold, and to facilitate position movement. Further, there can be two slide rails, arranged in parallel.

[0010] According to an embodiment of the present invention, a locking platform is provided on the first side mold, and a locking buckle is provided on the second side mold. The locking buckle and the locking platform are provided correspondingly. When the first side mold and the second side mold are brought together, they can be locked together by the locking buckle and the locking platform to prevent the first side mold and the second side mold from moving during casting.

[0011] According to an embodiment of the present invention, multiple through grooves and ingot cavities may be provided on the first side mold and the second side mold, respectively.

[0012] According to an embodiment of the present invention, an exhaust hole may be provided at the top of the first side mold, and the exhaust hole is connected to the pouring space.

[0013] Compared with the prior art, the technical solution provided by the embodiments of this utility model can achieve at least the following beneficial effects:

[0014] The present invention relates to a cleaning device for low-pressure casting crucibles of aluminum alloy castings. It features an innovative structural design and a dedicated crucible cleaning device consisting of an aluminum ingot forming device and an extended liquid riser. The device utilizes the filling capacity of the low-pressure casting equipment to clean the remaining molten aluminum material at the bottom.

[0015] The cleaning device for low-pressure casting crucibles of aluminum alloy castings according to this utility model has a clear functional positioning. The device is only used to efficiently clean the remaining bottom material in the crucible, without having to consider aluminum ingot oxidation inclusions, process continuity and efficiency issues, thus simplifying the design objectives.

[0016] The cleaning device for low-pressure casting crucibles of aluminum alloy castings according to this utility model optimizes the mold-separating structure. The aluminum ingot forming device adopts a rotating screw left and right mold-separating structure, which is convenient to operate and improves practicality and ease of use.

[0017] According to the present invention, a cleaning device for a crucible used in low-pressure casting of aluminum alloy castings is provided, which is equipped with an extended liquid riser. Compared with conventional pouring, the extended liquid riser is closer to the bottom of the crucible, which helps to more thoroughly extract the remaining aluminum liquid.

[0018] The cleaning device for low-pressure casting crucibles of aluminum alloy castings according to this utility model significantly improves cleaning efficiency, can clean 95% of the remaining bottom material of the crucible, and after cooling, only a light tap is needed to remove the residual aluminum skin, saving more than 98% of the operation time compared with the traditional long-handled spoon scooping method.

[0019] The cleaning device for low-pressure casting crucibles of aluminum alloy castings according to this utility model can reduce labor intensity and increase production pace, significantly reduce the physical labor time of workers, and accelerate the production rhythm of changing different grades of aluminum alloys, thereby improving the overall casting production efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0021] Figure 1These are schematic front and cross-sectional views of a prior art low-pressure casting crucible;

[0022] Figure 2a This is a schematic diagram showing a cleaning device for a low-pressure casting crucible for aluminum alloy castings, according to an embodiment of the present invention, installed on the low-pressure casting crucible;

[0023] Figure 2b yes Figure 2a AA section view;

[0024] Figure 3 This is a schematic diagram showing a cleaning device for a low-pressure casting crucible for aluminum alloy castings according to an embodiment of the present invention;

[0025] Figure 4a This is a top view of the bottom mold of a cleaning device for a low-pressure casting crucible for aluminum alloy castings according to an embodiment of the present invention;

[0026] Figure 4b yes Figure 4a The main view.

[0027] Figure 5 This is a schematic diagram showing a rotating moving member according to an embodiment of the present utility model;

[0028] Figure 6a This is a schematic diagram of the first side mold according to an embodiment of the present utility model;

[0029] Figure 6b This is a schematic diagram of the second side mold according to an embodiment of the present invention. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0032] Figure 2aThis is a schematic diagram showing a cleaning device for a low-pressure casting crucible for aluminum alloy castings, according to an embodiment of the present invention, installed on the low-pressure casting crucible; Figure 2b yes Figure 2a AA section view; Figure 3 This is a schematic diagram illustrating a cleaning device for a low-pressure casting crucible for aluminum alloy castings according to an embodiment of the present invention.

[0033] like Figures 2a to 3 As shown, the low-pressure casting crucible has an opening at the top. A cleaning device for the low-pressure casting crucible for aluminum alloy castings is set at the top of the low-pressure casting crucible. It includes: a low-pressure pouring platform 1, a bottom mold 2, a rotating moving part 6, a first side mold 3, a second side mold 4, and a riser pipe 5.

[0034] The low-pressure pouring platform 1 is set on the upper opening of the low-pressure casting crucible and is used to support the entire cleaning device for the low-pressure casting crucible of aluminum alloy castings.

[0035] The bottom mold 2 is fixedly set on the low-pressure casting platform 1. The center of the bottom mold 2 is provided with an upward protruding gate platform 21. The first lead screw 62 set 22 and the second lead screw 62 set 23 are respectively set on the opposite sides of the bottom mold 2.

[0036] Both the first lead screw 62 unit 22 and the second lead screw 62 unit 23 are equipped with a rotating moving part 6, which is installed on the first lead screw 62 unit 22 or the second lead screw 62 unit 23.

[0037] The first side mold 3 and the second side mold 4 are vertically arranged and opposite to each other. The first side mold 3 and the second side mold 4 are respectively connected to the rotating moving parts 6. The relative positions of the first side mold 3 and the second side mold 4 are changed by the movement of the two rotating moving parts 6.

[0038] The gating platform 21 is connected downward to the riser pipe 5, which extends downward to the bottom of the low-pressure casting crucible.

[0039] When the low-pressure casting crucible needs to be cleaned, the first side mold 3 and the second side mold 4 are moved and brought together by the rotating moving part 6 to form a pouring space connected to the gating platform 21. The aluminum liquid at the bottom of the low-pressure casting crucible rises through the riser pipe 5 and enters the pouring space through the gating platform 21. After forming an aluminum ingot, it can be taken out.

[0040] The cleaning device for low-pressure casting crucibles of aluminum alloy castings according to this utility model has a clear functional positioning. The device is only used for efficiently cleaning the remaining bottom material in the crucible, without considering aluminum ingot oxide inclusions, process continuity, and efficiency issues, thus simplifying the design objectives. The cleaning device for low-pressure casting crucibles of aluminum alloy castings can reduce labor intensity and increase production cycle, significantly reducing the physical labor time of workers, while accelerating the production pace of changing to different grades of aluminum alloys, thereby improving the overall casting production efficiency.

[0041] According to one or more embodiments of this utility model, the distance between the riser tube 5 and the bottom of the crucible is in the range of 5mm to 10mm. Further, the distance between the riser tube 5 and the bottom of the crucible is 6mm to 8mm.

[0042] This invention relates to a cleaning device for low-pressure casting crucibles of aluminum alloy castings. The device features an innovative structural design, comprising an aluminum ingot forming device and an extended riser pipe 5. It utilizes the filling capacity of the low-pressure casting equipment to clean the remaining molten aluminum at the bottom. This cleaning device significantly improves efficiency, removing up to 95% of the remaining material from the bottom of the crucible. After cooling, residual aluminum can be removed with a light tap, saving over 98% of the operation time compared to the traditional long-handled spoon method.

[0043] Figure 5 This is a schematic diagram showing the rotating moving member 6 according to an embodiment of the present invention.

[0044] According to one or more embodiments of the present invention, the rotating moving part 6 includes a lead screw 62, a lead screw shaft 61, and a rotating rod 63. The lead screw shaft 61 is disposed in a first lead screw 62 set 22 or a second lead screw 62 set 23. Rotating rods 63 are provided at both ends of the lead screw shaft 61 to reduce the force required to rotate the lead screw shaft 61 by means of leverage. One end of the lead screw 62 is fixedly connected to a first side mold 3 or a second side mold 4, and the other end is perpendicularly connected to the lead screw 62 by a thread, thereby forming a displacement perpendicular to the lead screw shaft 61 when the lead screw shaft 61 rotates.

[0045] Figure 4a This is a top view of the bottom mold 2 of a cleaning device for a low-pressure casting crucible for aluminum alloy castings according to an embodiment of the present invention; Figure 4b yes Figure 4b The main view.

[0046] According to one or more embodiments of this utility model, a side mold slide rail 24 is provided on the bottom mold 2 to support the first side mold 3 and the second side mold 4 and to facilitate position movement. Further, there are two slide rails 24, arranged in parallel.

[0047] Figure 6a This is a schematic diagram of the first side mold 3 according to an embodiment of the present invention; Figure 6b This is a schematic diagram of the second side mold 4 according to an embodiment of the present invention.

[0048] like Figures 6a-6bAs shown, a locking platform 31 is provided on the first side mold 3, and a locking buckle 41 is provided on the second side mold 4. The locking buckle 41 and the locking platform 31 are provided correspondingly. When the first side mold 3 and the second side mold 4 come together, they are locked by the locking buckle 41 and the locking platform 31 to prevent the first side mold 3 and the second side mold 4 from moving during casting.

[0049] According to one or more embodiments of the present invention, a plurality of through grooves 32 and ingot groove 33 are respectively provided on the first side mold 3 and the second side mold 4.

[0050] According to one or more embodiments of the present invention, a vent hole 34 is provided on the top of the first side mold 3, and the vent hole 34 is connected to the pouring space.

[0051] According to the present invention, a cleaning device for a crucible used in low-pressure casting of aluminum alloy castings has been developed. Through optimization of the mold-separating structure, the aluminum ingot forming device adopts a rotating screw with a left and right mold-separating structure, which is convenient to operate and improves practicality and ease of use.

[0052] During use, place the extended riser pipe: Position the extended riser pipe at the center of the low-pressure casting platform. Place the aluminum ingot forming device: Place the aluminum ingot forming device on the low-pressure casting platform, ensuring the center of the ingot forming device's gate platform is aligned with the center of the riser pipe. Close the first side mold: Rotate the crank on the first lead screw platform clockwise to ensure the first side mold's gate sealing groove is flush with the bottom mold's gate platform. Close the second side mold: Rotate the crank on the second lead screw platform counterclockwise to ensure the second side mold's gate sealing groove is flush with the bottom mold's gate platform. Lock the first and second side molds: Secure the second side mold's locking mechanism to the first side mold's locking platform. Secure the aluminum ingot forming device: Tighten the bolts to secure the aluminum ingot forming device to the casting base plate. Preheat the aluminum ingot forming device: Use a natural gas gun to heat the first side mold, second side mold, and lower mold's gate platform of the aluminum ingot forming device to 300℃~350℃. Filling the crucible: Start the low-pressure casting equipment and begin injecting the crucible bottom material into the aluminum ingot forming device. Removing the solidified aluminum ingot from the aluminum ingot forming device: After the aluminum liquid has filled and solidified, rotate the first side mold rod counterclockwise and the second side mold rod clockwise to open the first and second side molds. Then, use long-handled iron clamps to remove the aluminum ingot from the aluminum ingot forming device.

[0053] The above description is merely an exemplary embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. The scope of protection of the present utility model is determined by the appended claims.

Claims

1. A cleaning device for an aluminum alloy casting low pressure casting crucible, characterized by, The low-pressure casting crucible has an opening at the top, and the cleaning device is located at the top of the low-pressure casting crucible, comprising: A low-pressure pouring platform is set on the upper opening of the low-pressure casting crucible to support the entire cleaning device for the low-pressure casting crucible of aluminum alloy castings. The bottom mold is fixedly set on the low-pressure casting platform. The bottom mold has an upwardly protruding gate platform at its center. The bottom mold has a first screw platform and a second screw platform on opposite sides. A rotary moving component is provided on both the first lead screw table and the second lead screw table, and the rotary moving component is installed on the first lead screw table or the second lead screw table. The first side mold and the second side mold are vertically arranged and opposite to each other. The first side mold and the second side mold are respectively connected to the rotating moving parts. The relative positions of the first side mold and the second side mold are changed by the movement of the two rotating moving parts. A riser pipe is connected downwards to the gating platform, and the riser pipe extends downwards to near the bottom of the low-pressure casting crucible. When the low-pressure casting crucible needs cleaning, the first and second side molds move and come together via a rotating moving part to form a pouring space connected to the gating platform. The molten aluminum at the bottom of the low-pressure casting crucible rises through the riser pipe, enters the pouring space through the gating platform, and forms an aluminum ingot, which can then be removed.

2. The cleaning device for an aluminum alloy casting low-pressure casting crucible according to claim 1, characterized by, The distance between the riser tube and the bottom of the crucible is in the range of 5mm to 10mm.

3. The cleaning device for an aluminum alloy casting low-pressure casting crucible according to claim 1, characterized by, The distance between the riser tube and the bottom of the crucible is 6mm to 8mm.

4. The cleaning device for an aluminum alloy casting low-pressure casting crucible according to claim 1, characterized by, The rotating component includes a lead screw, a lead screw shaft, and a rotating rod. The lead screw shaft is disposed in a first lead screw platform or a second lead screw platform, and rotating rods are disposed at both ends of the lead screw shaft to reduce the force required to rotate the lead screw shaft by means of leverage. One end of the lead screw is fixedly connected to a first side mold or a second side mold, and the other end is perpendicularly connected to the lead screw shaft by a thread, thereby forming a displacement perpendicular to the lead screw shaft when the lead screw shaft rotates.

5. The cleaning device for an aluminum alloy casting low-pressure casting crucible according to claim 1, characterized by, The bottom mold is provided with side mold slide rails to support the first side mold and the second side mold, and to facilitate position movement.

6. The cleaning device for an aluminum alloy casting low-pressure casting crucible according to claim 5, characterized by, There are two slide rails, which are arranged in parallel.

7. The cleaning device for an aluminum alloy casting low-pressure casting crucible according to claim 1, characterized by, A locking platform is provided on the first side mold, and a locking buckle is provided on the second side mold. The locking buckle and the locking platform are correspondingly provided. When the first side mold and the second side mold are brought together, they are locked by the locking buckle and the locking platform to prevent the first side mold and the second side mold from moving during casting.

8. The cleaning device for an aluminum alloy casting low-pressure casting crucible according to claim 1, characterized by, The first side mold is provided with multiple through grooves and ingot groove cavities.

9. The cleaning device for an aluminum alloy casting low-pressure casting crucible according to claim 1, characterized by, The second side mold is provided with multiple through grooves and ingot groove cavities.

10. The cleaning device for an aluminum alloy casting low-pressure casting crucible according to claim 1, characterized by, The first side mold has an exhaust hole at its top, and the exhaust hole is connected to the pouring space.

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