Casting structure for casting stand column

Abstract

The utility model provides a casting structure for casting a stand column. The casting structure for casting the stand column comprises a mold box, the mold box is filled with molding sand, a cavity of the stand column is formed in the mold box, an annular transverse pouring gate is arranged at the top of the cavity, a plurality of inner pouring gates used for being communicated with the cavity are arranged on the periphery of the annular transverse pouring gate, and the inner pouring gates are evenly distributed according to the position of the cavity. An inner cross gate communicated with the annular cross gate is arranged at the center of the annular cross gate; and a plurality of gas outlet risers which are uniformly distributed are arranged at the top of the cavity and are positioned on the periphery of the annular cross gate. Through the design of the annular pouring gate, molten iron mold filling is more stable, the temperature field of molten iron in a mold cavity is more uniform, the structures of all parts of a casting tend to be consistent, and the overall performance of the casting is improved; the gas outlet risers are uniformly distributed, so that the cavity is smoother and quicker to discharge gas, the air hole defect of the casting is avoided, and the quality of the casting is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of column casting, in particular to a casting structure used for column casting. Background Art

[0002] In the existing column casting process, the molten iron enters the cavity through the sprue, cross runner and entgate during casting. The cross runner is linearly distributed, the entgate connects the cavity, and a gas outlet is set to avoid the runner for exhaust. The number of gas outlets is small. However, for the columns of semiconductor cutting equipment required by customers, the stress and hardness of the castings are required to be more uniform, and porosity defects are not allowed. If the structure of the casting is irregular and the cooling conditions of each part are different, the existing casting structure will easily produce differences in stress and hardness. If the top surface of the casting is a large plane, porosity defects are prone to occur, which cannot meet customer needs. Utility Model Content

[0003] Based on this, it is necessary to provide a casting structure for column casting to address the problem that the existing casting structure cannot meet the casting needs of castings with irregular structures and large flat top surfaces.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A casting structure for column casting includes a mold box, the interior of the mold box is filled with molding sand, and a column cavity is formed in the mold box, an annular cross runner is arranged at the top of the cavity, and a plurality of inner runners for connecting the cavity are arranged at the outer periphery of the annular cross runner, the inner runners are evenly arranged according to the position of the cavity, and an inner cross runner connecting the annular cross runner is arranged at the center of the annular cross runner; a plurality of evenly arranged air outlet risers are arranged at the top of the cavity, and the air outlet risers are located at the outer periphery of the annular cross runner.

[0006] Furthermore, the center of the inner runner is connected to the sprue, the sprue is located at the top of the inner runner, and a filter is provided at the connection between the inner runner and the sprue.

[0007] Furthermore, the diameter of the sprue gradually increases from bottom to top, and is truncated into a cone shape.

[0008] Furthermore, the air outlet risers are distributed along the top edge of the cavity, and their sizes gradually increase from bottom to top, forming a prism shape.

[0009] Furthermore, the mold box is formed by splicing two templates, and the joint of the two templates is tightly fitted through a locking structure.

[0010] Furthermore, the locking structure includes two pressing plates and locking bolts; the mold box spliced ​​by two templates is located between the two pressing plates and covered by the pressing plates, and locking bolts are arranged at the edges of the pressing plates. When the locking bolts are tightened, the templates located between the pressing plates are in a tightly fitted state.

[0011] Furthermore, the locking structure includes a pressure plate, an L-shaped rod and a limiting bolt; the pressure plate is located on one side of the mold box and has a plane size larger than the mold box, and a plurality of L-shaped rods are rotatably connected at the symmetrical edges of the pressure plate, and the top of the L-shaped rod is threadedly connected to the limiting bolt. When the end of the limiting bolt is close to the mold box, the template is in a tightly fitting state.

[0012] Furthermore, the locking structure includes a pressure plate, a fixed rod, a movable rod and a limiting bolt; the pressure plate is located on one side of the mold box and has a plane size larger than the mold box, the fixed rod is vertically connected to the symmetrical edge of the pressure plate, the top of the fixed rod is rotatably connected to the movable rod, and the end of the movable rod is threadedly connected to the limiting bolt. When the end of the limiting bolt is close to the mold box, the template is in a tightly fitted state.

[0013] Compared with the prior art, the beneficial effects of the utility model include:

[0014] 1. The utility model adopts the design of the annular runner to make the molten iron filling more stable, the temperature field of the molten iron in the cavity more uniform, the organization of each part of the casting more consistent, and improve the overall performance of the casting;

[0015] 2. The utility model has evenly distributed air outlets, so that the air outlet of the cavity is smoother and faster, thus avoiding the air hole defects of the casting and ensuring the quality of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0017] Figure 1 This is a schematic diagram of the distribution of the annular runner and the air outlet riser introduced in the utility model;

[0018] Figure 2 A cross-sectional view of the casting structure for column casting introduced in Example 1;

[0019] Figure 3 A cross-sectional view of the casting structure for column casting introduced in Example 2;

[0020] Figure 4 This is a cross-sectional view of the casting structure for column casting introduced in Example 3.

[0021] Explanations in the figure: 1. Mold box; 11. Template; 2. Annular runner; 3. Inner runner; 4. Inner runner; 5. Vent riser; 6. Straight runner; 7. Locking structure; 71. Pressing plate; 72. Locking bolt; 73. Pressing plate; 74. L-shaped rod; 75. Limiting bolt; 76. Fixing rod; 77. Movable rod. DETAILED DESCRIPTION

[0022] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction to the technical solution of the utility model.

[0023] Example 1

[0024] This embodiment introduces a casting structure for column casting, which mainly fills the mold box 1 with molded sand to form not only the mold cavity of the required casting (column), but also the runner of the casting. The mold box 1 is not integrally formed, but is formed by splicing two templates 11 to form a mold box 1. In this way, after casting, the mold 11 can be disassembled and the sand can be removed to obtain the cast casting, and then the redundant parts can be removed to obtain the required column.

[0025] The runner of this embodiment is composed of a straight runner 6, an inner runner 4, an annular runner 2 and an inner runner 3 arranged in sequence. Figure 1 As shown, it is a schematic diagram of the molding after casting. Since the column is irregular, the layout of the annular runner 2 matches the overall shape of the column. Figure 1 The annular runner 2 shown is similar to a parallelogram, and can be adjusted according to the gradual shape in actual use. The outer wall of the annular runner 2 is provided with uniformly distributed entrails 3, and the distribution of the entrails 3 is distributed according to the shape of the casting, and the molten iron is synchronously guided into the mold cavity. The entrails 4 are located inside the annular runner 2, and the two are connected to connect the straight runner 6 and the annular runner 2. The straight runner 6 is located at the top middle end of the inner runner 4. In order to reduce impurities in the molten iron, a filter sheet (not shown in the figure) is provided at the connection between the inner runner 4 and the straight runner 6. In order to guide the molten iron into the annular runner 2 through the straight runner 6, the diameter of the straight runner 6 gradually increases from bottom to top, and is truncated.

[0026] The top of the column is a large plane, and gas outlet risers 5 are evenly distributed along the top edge of the cavity, and the size gradually increases from bottom to top, forming a prism shape, which facilitates the gas to be discharged from the cavity, and the gas outlet is smoother and faster, avoiding the defect of casting porosity. The annular runner 2 is located inside the gas outlet riser 5, and the annular runner 2 and the gas outlet riser 5 are staggered.

[0027] like Figure 2 As shown, for the mold box 1 after the templates 11 are spliced, the locking structure 7 can be used to lock the limit position after the ends of the templates 11 are fitted together, so that the two templates 11 are tightly spliced. The locking structure 7 in this embodiment mainly adopts two pressing plates 71 and multiple locking bolts 72. After the templates 11 are spliced ​​into the mold box 1, the two pressing plates 71 are respectively located on both sides of the symmetrical and non-joined parts of the mold box 1. The plane size of the pressing plate 71 is larger than the size of the mold box 1, so the edge of the pressing plate 71 is located on the outside of the mold box 1, and the locking bolts 72 are located at the edge of the pressing plate 71, that is, at the periphery of the joint of the mold box 1. The number of locking bolts 72 is multiple and reasonably distributed at the edge of the pressing plate 71. Tighten the locking bolts 72 to make the two pressing plates 71 close to the mold box 1, so that the joint of the templates 11 of the mold box 1 fits tightly.

[0028] Through the design of the annular runner in this embodiment, the molten iron fills the mold more smoothly, the temperature field of the molten iron in the mold cavity is more uniform, the structure of each part of the casting is more consistent, and the overall performance of the casting is improved.

[0029] Example 2

[0030] like Figure 3 As shown, this embodiment introduces a casting structure for column casting, which is basically the same as the casting structure for column casting introduced in Example 1. The difference is that the locking structure 7 of this embodiment includes a pressing plate 73, an L-shaped rod 74 and a limiting bolt 75; the pressing plate 73 is located on one side of the mold box 1 and has a larger plane size than the mold box 1, and a plurality of L-shaped rods 74 are rotatably connected at the symmetrical edges of the pressing plate 73, and the L-shaped rods 74 are located on the outside of the mold box 1 and do not hinder the mold box 1 from fitting the pressing plate 73, and the top of the L-shaped rod 74 is threadedly connected with the limiting bolt 75.

[0031] When the mold box 1 needs to be compressed, the L-shaped rod 74 needs to be rotated to ensure that the end of the limit bolt 75 is facing the outer plane of the mold box 1, and then the limit bolt 75 is tightened to make the limit bolt 75 close to the mold box 1, so that the joints of the two templates 11 constituting the mold box 1 are in a tightly fitted state.

[0032] This embodiment has the same beneficial effects as Embodiment 1.

[0033] Example 3

[0034] like Figure 4As shown, this embodiment introduces a casting structure for column casting, which is basically the same as the casting structure for column casting introduced in Example 1. The difference is that the locking structure 7 of this embodiment includes a pressing plate 73, a fixed rod 76, a movable rod 77 and a limiting bolt 75; the pressing plate 73 is located on one side of the mold box 1 and has a larger plane size than the mold box 1, and the fixing rod 76 is vertically connected to the symmetrical edge of the pressing plate 73, and the top of the fixing rod 76 is rotatably connected to the movable rod 77, and the end of the movable rod 77 is threadedly connected to the limiting bolt 75, and the shape formed by the combination of the fixing rod 76 and the movable rod 77 is approximately L-shaped. When the joint of the template 11 constituting the mold box 1 needs to be tightly fitted, the movable rod 77 is rotated to make the end of the limiting bolt 75 relative to the pressing plate 73 and face the outer side of the template 11, and the limiting bolt 75 is tightened to make the joint of the two templates 11 fit tightly.

[0035] This embodiment has the same beneficial effects as Embodiment 1.

[0036] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A casting structure for column casting, characterized in that: The invention comprises a mold box (1), the interior of the mold box (1) is filled with molding sand, and a column cavity is formed in the mold box (1), an annular runner (2) is arranged at the top of the cavity, a plurality of entrappers (3) for connecting the cavity are arranged at the periphery of the annular runner (2), the entrappers (3) are evenly arranged according to the position of the cavity, an inner runner (4) connecting the annular runner (2) is arranged at the center of the annular runner (2); a plurality of evenly arranged air outlet risers (5) are arranged at the top of the cavity, and the air outlet risers (5) are located at the periphery of the annular runner (2).

2. The casting structure for column casting according to claim 1, characterized in that: The center of the inner runner (4) is connected to the sprue (6), the sprue (6) is located at the top of the inner runner (4), and a filter is provided at the connection between the inner runner (4) and the sprue (6).

3. The casting structure for column casting according to claim 2, characterized in that: The diameter of the sprue (6) gradually increases from bottom to top, and is in the shape of a truncated cone.

4. The casting structure for column casting according to claim 1, characterized in that: The gas outlet risers (5) are distributed along the top edge of the cavity, and their sizes gradually increase from bottom to top, forming a prism shape.

5. The casting structure for column casting according to claim 1, characterized in that: The mold box (1) is formed by splicing two templates (11), and the splicing position of the two templates (11) is tightly fitted through a locking structure (7).

6. The casting structure for column casting according to claim 5, characterized in that: The locking structure (7) comprises two pressing plates (71) and locking bolts (72); the mold box (1) formed by splicing two templates (11) is located between the two pressing plates (71) and is covered by the pressing plates (71); locking bolts (72) are arranged at the edges of the pressing plates (71); when the locking bolts (72) are tightened, the templates (11) located between the pressing plates (71) are in a tightly fitted state.

7. The casting structure for column casting according to claim 5, characterized in that: The locking structure (7) comprises a pressing plate (73), an L-shaped rod (74) and a limiting bolt (75); the pressing plate (73) is located on one side of the mold box (1) and has a planar dimension larger than the mold box (1); a plurality of L-shaped rods (74) are rotatably connected at symmetrical edges of the pressing plate (73); the top of the L-shaped rod (74) is threadedly connected to the limiting bolt (75); when the end of the limiting bolt (75) is in close contact with the mold box (1), the two templates (11) are in a tightly fitted state.

8. The casting structure for column casting according to claim 5, characterized in that: The locking structure (7) comprises a pressing plate (73), a fixing rod (76), a movable rod (77) and a limiting bolt (75); the pressing plate (73) is located on one side of the mold box (1) and has a planar dimension larger than the mold box (1); a fixing rod (76) is vertically connected to a symmetrical edge of the pressing plate (73); a movable rod (77) is rotatably connected to the top end of the fixing rod (76); an end of the movable rod (77) is threadedly connected to the limiting bolt (75); when the end of the limiting bolt (75) is in close contact with the mold box (1), the two templates (11) are in a tightly fitted state.

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