Electric planetary support vertical gating system

Abstract

This utility model relates to the field of gating system technology, and more particularly to an electric planetary support vertical line gating system. It includes a pouring cup, a first horizontal runner perpendicular to the pouring cup and arranged horizontally on both sides, a first vertical runner connected to both sides of the first horizontal runner and arranged vertically downwards via counter-pressure plates, planetary support cavities respectively arranged on the outer sides of the first vertical runners, and a plurality of risers respectively connected to and communicating with the planetary support cavities. The beneficial effects of this utility model are: the three risers work together to ensure no shrinkage defects in key areas of the casting, and the heat preservation function maintains a uniform temperature field throughout the casting. The anti-deformation design significantly improves the dynamic balance instability caused by gravity under vertical line production conditions, improving casting quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of casting system technology, and in particular to an electric planetary support vertical line casting system. Background Technology

[0002] With the development of vacuum precision casting technology, various gating positioning systems have been widely used in the production of high-temperature alloys and complex structural castings. Especially in vertical line casting processes requiring high precision and consistency, the positioning accuracy of the gating system directly affects the quality of the castings, such as the control of defects like shrinkage porosity, cold shuts, and sandblasting. However, existing gating positioning systems still have significant shortcomings when dealing with star-shaped castings with complex structures and high dynamic balance requirements.

[0003] A search revealed a vacuum casting positioning system and method, publication number CN109877304B, published on August 20, 2021. This patent proposes a vacuum casting positioning scheme that utilizes a mold shell transmission positioning device and a self-controlled positioning system working in concert. It uses a mold shell position acquisition system and a casting crucible pouring inlet center position acquisition system to acquire spatial coordinate information in real time, determining whether the mold shell center and the casting center are on the same vertical line, and adjusting the mold shell position through a control system to achieve centering. While this technology avoids the problem of casting liquid spillage caused by moving the casting crucible and improves casting integrity and work efficiency, its core lies in passively adjusting the mold shell position to match and fix the casting center. It does not involve optimizing the dynamic adjustment capability of the casting system itself, and especially lacks targeted feeding and flow field control design for complex castings with multiple hot spots and areas of material loss. For castings like the CMB-developed electric planetary support, which have complex shapes, large differences in wall thickness, and high risk of shrinkage porosity, relying solely on mold positioning and correction is insufficient to ensure smooth filling and the effectiveness of the feeding channels, which can easily lead to local shrinkage porosity or cold shut defects.

[0004] The above problems indicate that although the existing vacuum casting positioning system has achieved automatic alignment between the mold shell and the casting center, it still has technical bottlenecks when facing the high-complexity and high dynamic balance requirements of vertical line casting such as electric planetary support, such as unreasonable feeding, unstable filling, weak slag avoidance ability and lack of anti-deformation design.

[0005] Therefore, it is necessary to design an electric planetary support vertical line casting system to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide an electric planetary support vertical line casting system to overcome the above-mentioned shortcomings of the existing technology.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An electric planetary support vertical line casting system includes a pouring cup, a first horizontal runner perpendicular to the pouring cup and arranged horizontally on both sides, a first vertical runner connected to both sides of the first horizontal runner and arranged vertically downwards via counter-pressure plates, planetary support cavities respectively arranged on the outer sides of the first vertical runners, and a plurality of risers respectively connected to the planetary support cavities. The system is characterized in that: the bottom of the first vertical runners on both sides is connected to a second vertical runner; the beginning and end portions of the second vertical runners on both sides are respectively connected to the risers of adjacent portions via second water inlets; and the upper portions of the first vertical runners on both sides are respectively provided with third vertical flow channels extending to one side of the adjacent planetary support cavity via third water inlets, and the third vertical flow channels are connected to the adjacent risers.

[0009] Preferably, the risers are respectively disposed around the planetary support cavity, and are respectively located on the non-protruding part of the planetary support cavity, and are connected to the planetary support cavity.

[0010] Preferably, each of the planetary support cavities is provided with three sets of risers, and the three sets of risers are distributed at equal angles.

[0011] Preferably, the first vertical runner and the second vertical runner form an L-shaped runner and are configured to partially surround the adjacent planetary support cavity.

[0012] Preferably, a third set of planetary support cavities is provided below the middle of the first vertical gating, and L-shaped second cross channels extend downward from the middle section of the second vertical gating on both sides. A fourth water inlet plate is provided at the end of the second cross channels on both sides, and the fourth water inlet plate is connected to the adjacent riser.

[0013] Preferably, one of the sets of the second vertical gating channels on both sides is connected to a third cross gating channel via a fifth water inlet plate, and the third cross gating channel is connected to the adjacent riser.

[0014] Preferably, the first vertical runner is a gradient vertical runner, wherein the diameter of the runner gradually decreases from the inlet to the outlet.

[0015] Preferably, the first horizontal pouring channel is also provided with a slag collection bag.

[0016] The beneficial effects of this invention are as follows: The three risers used in this technical solution work together to ensure that there are no shrinkage defects in key areas of the casting, and the insulation function maintains a uniform temperature field throughout the casting. The anti-deformation design significantly improves the dynamic balance instability caused by gravity under vertical production conditions, thus improving casting quality and production efficiency. Furthermore, by precisely controlling the shrinkage rate in non-machined areas, the occurrence of casting defects is further reduced. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of an electric planetary support vertical line casting system according to the present invention;

[0018] In the diagram: 1. Sprue cup; 2. First horizontal runner; 3. Back pressure plate; 4. First vertical runner; 5. Star support cavity; 6. Second vertical runner; 7. Second inlet plate; 11. Riser; 8. Third inlet plate; 9. Third vertical runner; 10. Second horizontal runner; 12. Fourth inlet plate; 13. Fifth inlet plate; 14. Third horizontal runner. Detailed Implementation

[0019] Reference Figure 1 An electric planetary support vertical line casting system includes a pouring cup 1, a first horizontal runner 2 arranged horizontally on both sides perpendicular to the pouring cup, a first vertical runner 4 arranged vertically downward on both sides of the first horizontal runner 2 respectively through a counter pressure plate 3, a planetary support cavity 5 respectively arranged on the outer side of the first vertical runner 4, and a plurality of risers 11 respectively connected to the planetary support cavity 5.

[0020] The planetary support cavity 5 has multiple protruding parts, resembling a star-shaped structure. The risers 11 are respectively arranged around the planetary support cavity 5 and are respectively located on the non-protruding parts of the planetary support cavity 5, and are connected to the planetary support cavity 5.

[0021] The bottom of the first vertical runner 4 on both sides is connected to the second vertical runner 6. The first vertical runner 4 and the second vertical runner 6 form an L-shaped runner and partially surround the adjacent planetary support cavity 5.

[0022] The first and last parts of the second vertical gating channel 6 on both sides are connected to the riser 11 of the adjacent part through the second water inlet plate 7 respectively;

[0023] The upper part of the first vertical gating channel 4 on both sides extends to the adjacent planetary support cavity 5 through the third water inlet plate 8 and is provided with a third vertical flow channel 9, and the third vertical flow channel 9 is connected to the adjacent riser 11.

[0024] Each planetary support cavity 5 is provided with three sets of risers 11, which are distributed at equal angles. Specifically, as shown in the attached diagram, two sets are located on the lower left and right sides of the planetary support cavity 5, and one set is located on the top of the planetary support cavity 5. The third vertical flow channel 9 is connected to the riser 11 located at the top, and the second water inlet plates on the other two sides are connected to adjacent risers 11. The design of the risers 11 is optimized for three hot nodes in the casting, and their size and position are precisely calculated to ensure that the hot nodes can receive direct feeding. The wall thickness of the riser 11 is increased compared to ordinary risers, and it is made of a low thermal conductivity material. This design prolongs the solidification time of the molten iron and maintains the uniformity of the overall temperature field of the casting. Due to the more uniform temperature distribution inside the casting, the probability of cold shut defects is significantly reduced. In addition, the riser 11 also has a heat preservation function, further improving the overall performance of the casting through continuous feeding of the hot nodes.

[0025] To further improve production efficiency, a third set of planetary support cavities 5 is provided below the middle of the first vertical runner 4. The same riser 11 is provided as above. In order to connect with this set of planetary support cavities 5, L-shaped second cross runners 10 extend downward from the middle of the second vertical runners 6 on both sides. A fourth water inlet plate 12 is provided at the end of the second cross runners 10 on both sides, and the fourth water inlet plate 12 is connected to the adjacent riser 11.

[0026] One of the sets of the second vertical gating channels 6 on both sides is connected to a third cross gating channel 14 through the fifth water inlet plate 13, and the third cross gating channel 14 is connected to the adjacent riser 11.

[0027] The second transverse runners 10 on both sides surround the third set of planetary support cavities 5 located in the middle and below the first vertical runner 4.

[0028] The first vertical runner 4 is a gradient vertical runner, where the diameter of the runner decreases from the inlet to the outlet. This gradient vertical runner allows for rapid filling during the initial filling stage, preventing sand defects caused by molten iron scorching the cavity and burning sand, while also saving costs to some extent. Specifically, the bottom cavity is filled with a certain amount of molten iron during the initial filling stage, followed by gradual filling of the upper cavity. To achieve this, the start time of the upper water inlet is strictly limited to when the bottom water inlet has entered approximately two-thirds of the casting. This control mechanism effectively prevents molten iron from falling directly to the bottom of the cavity and splashing, thus significantly reducing the occurrence of sand defects and cold shuts. Furthermore, the design of the water inlet baffles connected to the riser (i.e., the first to fifth water inlet plates mentioned above) further improves the surface quality of the casting by limiting the flow rate of molten iron, ensuring a smooth flow velocity when the molten iron enters the cavity.

[0029] The first horizontal gutter 2 is also connected to a slag collection bag;

[0030] The system operates as follows: S1, molten iron flows from the furnace into the horizontal runner and undergoes initial impurity removal via a slag collection ladle; S2, the molten iron passes through a counter-pressure plate into the gradient vertical runner, achieving flow rate regulation and rapid introduction; S3, the molten iron enters the mold cavity through risers in a predetermined sequence, first filling the bottom cavity and then gradually filling upwards; S4, the risers directly compensate for the hot spots in the casting and maintain a uniform temperature field; S5, the stress distribution of the casting is adjusted through anti-deformation design, improving dynamic balance stability. Throughout the process, the coordinated action of various components ensures that the molten iron quickly fills the flow path while maintaining a gentle flow rate into the mold cavity, effectively avoiding defects such as sand and slag inclusions. The three risers work together to ensure no shrinkage porosity defects in key areas of the casting and maintain a uniform overall temperature field through heat preservation.

[0031] This invention employs a reverse deformation design to address the dynamic balance instability caused by gravity under vertical production conditions. The reverse deformation design adjusts the stress distribution of the casting by applying a deformation in the opposite direction to gravity during the casting process. This design counteracts the influence of gravity on the dynamic balance of the casting, significantly improving its dynamic balance stability. To adapt to product structural characteristics and reduce casting defects, the shrinkage rates in non-machined areas are controlled at 0.8% and 0.6%, respectively.

[0032] 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. An electric planetary support vertical gating system, comprising a gating cup, a first horizontal runner perpendicular to the gating cup and arranged horizontally on both sides, a first vertical runner connected to both sides of the first horizontal runner and arranged vertically downwards via counter-pressure plates, planetary support cavities respectively arranged on the outer sides of the first vertical runners, and a plurality of risers respectively connected to and communicating with the planetary support cavities, characterized in that: The bottom of the first vertical gating on both sides is connected to the second vertical gating. The beginning and end of the second vertical gating on both sides are connected to the risers of the adjacent parts through the second water inlet plate. The upper part of the first vertical gating on both sides is provided with a third vertical flow channel extending to the adjacent planetary support cavity through the third water inlet plate, and the third vertical flow channel is connected to the adjacent riser.

2. The electric planetary support vertical casting system according to claim 1, characterized in that: The risers are respectively disposed around the planetary support cavity, and are respectively located on the non-protruding part of the planetary support cavity, and are connected to the planetary support cavity.

3. The electric planetary support vertical casting system according to claim 2, characterized in that: Each planetary support cavity is provided with three sets of risers, and the three sets of risers are distributed at equal angles.

4. The electric planetary support vertical casting system according to claim 1, characterized in that: The first vertical runner and the second vertical runner form an L-shaped runner and partially surround the adjacent planetary support cavity.

5. The electric planetary support vertical casting system according to claim 1, characterized in that: A third set of planetary support cavities is provided in the middle and lower part of the first vertical gating channel. L-shaped second cross channels extend downward from the middle section of the second vertical gating channels on both sides. A fourth water inlet plate is provided at the end of the second cross channels on both sides, and the fourth water inlet plate is connected to the adjacent riser.

6. The electric planetary support vertical casting system according to claim 1, characterized in that: One of the sets of the second vertical gating channels on both sides is connected to a third cross gating channel via the fifth water inlet plate, and the third cross gating channel is connected to the adjacent riser.

7. The electric planetary support vertical casting system according to claim 1, characterized in that: The first vertical runner is a gradient vertical runner, wherein the diameter of the runner decreases from the inlet to the outlet.

8. The electric planetary support vertical casting system according to claim 1, characterized in that: The first horizontal pouring channel is also equipped with a slag collection bag.

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