A special-shaped chill casting model structure

Abstract

The utility model discloses a kind of special-shaped cold iron casting model structures, including the cross gate one and cross gate two for special-shaped cold iron casting, the cross gate one and cross gate two are respectively arranged in the casting main body both sides to be cast, and with the casting main body intercommunication, the two sides of the casting main body are respectively provided with cold iron one and cold iron two, the cross gate one and the casting main body between being provided with water inlet piece one, the water inlet piece one and the casting main body between being provided with riser one.The utility model reduces casting defect by reasonable design cross gate and the water inlet piece between riser and set overflow block, reduce flange, pipe mouth place shrinkage porosity and surface inner cavity sand slag defect proportion;Optimize riser and cold iron setting, improve riser feeding efficiency, reduce riser quantity and volume;More molten iron is used for casting by reducing riser use, improve process yield and good product rate, reduce production cost.

Description

Technical Field

[0001] This utility model relates to the field of casting technology, and in particular to a structure for casting irregularly shaped chills. Background Technology

[0002] In sand casting, the design of the casting mold structure has a crucial impact on the quality of the casting, the yield rate, and the production cost. Traditional casting mold structures often present numerous problems when dealing with castings of complex shapes.

[0003] For example, during the casting process, when molten iron flows within the sand mold, excessive flow speed or improper direction can easily cause significant impact on the sand mold, leading to mold damage and consequently affecting the quality of the casting. Simultaneously, impurities such as sand and slag mixed in the molten iron are difficult to remove effectively, easily forming sand and slag defects inside and on the surface of the casting, thus reducing its quality.

[0004] In terms of feeding, the traditional structure's design and layout of risers are not reasonable enough, resulting in low feeding efficiency. To achieve a better feeding effect, a large number of risers with large volumes are often required, which not only increases production costs but also reduces the process yield. Moreover, in some special parts, such as the nozzle of the casting, the cooling rate is not precisely controlled, which can easily lead to defects such as shrinkage cavities and porosity, affecting the overall performance of the casting.

[0005] Taking common castings with flange and pipe end structures as an example, during the casting process, the flange and pipe end positions are prone to shrinkage cavities and porosity defects due to their structural characteristics. At the same time, sand and slag defects on the surface and inside the casting are difficult to control effectively, making it difficult to meet the requirements of high-quality castings. Utility Model Content

[0006] The purpose of this invention is to provide a special-shaped chill casting model structure. By rationally designing the water inlet plate between the sprue and the riser and setting an overflow block, it effectively reduces casting defects, lowers the proportion of shrinkage cavities and porosity at flanges and pipe ends, and reduces surface and internal slag defects. Optimizing the riser and chill settings improves riser feeding efficiency and reduces the number and volume of risers. Reducing riser usage allows more molten iron to be used in the casting, improving process yield and quality, and reducing production costs. The sprue cross-section and water inlet plate length are adjustable, and the riser shape is diverse, making the structure reasonable and flexible to adapt to castings of different specifications. Precise design of the chill position and structure optimizes the cooling effect, ensures uniform cooling of the casting, reduces internal stress and deformation, and fully meets the requirements of high-quality castings.

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include: A non-circular chill casting model structure includes: The first and second sprues are used for casting irregularly shaped chills. The first and second sprues are respectively located on both sides of the casting body to be cast and are interconnected with the casting body. Chills 1 and 2 are respectively provided on both sides of the casting body.

[0008] In the above-mentioned irregular chill casting model structure, a water inlet plate is provided between the horizontal sprue and the main body of the casting, and a riser is provided between the water inlet plate and the main body of the casting.

[0009] In the above-mentioned irregular-shaped chill casting model structure, an overflow block is also provided at the end of the horizontal sprue.

[0010] In the above-mentioned irregular chill casting model structure, there are two channels between the second horizontal sprue and the main body of the casting. One of the channels is provided with a water inlet plate three and a riser three, while the other channel is provided with a water inlet plate two and a riser two.

[0011] In the above-mentioned irregular-shaped chill casting model structure, an overflow block 2 is also provided at the end of the second horizontal sprue.

[0012] In the above-mentioned irregular-shaped chill casting model structure, the cross-sections of the first and second horizontal sprues are both trapezoidal strip structures.

[0013] In the above-mentioned irregular-shaped chill casting model structure, both overflow block one and overflow block two are frustum-shaped designs.

[0014] This utility model has at least the following beneficial effects: 1. This utility model realizes a special-shaped chill casting model structure. By rationally designing the water inlet plate between the sprue and the riser and setting the overflow block, it effectively reduces casting defects and lowers the proportion of shrinkage cavities and porosity at flanges and pipe ends, as well as surface and internal cavities of sand and slag defects. Optimizing the riser and chill settings improves riser feeding efficiency and reduces the number and volume of risers. Reducing the use of risers allows more molten iron to be used in the casting, improving the process yield and quality rate, and reducing production costs. The cross-section of the sprue and the length of the water inlet plate are adjustable, and the riser shape is diverse, with a reasonable and flexible structure to adapt to castings of different specifications. Precise design of the chill position and structure optimizes the cooling effect, ensures uniform cooling of the casting, reduces internal stress and deformation, and fully meets the requirements of high-quality castings.

[0015] 2. Reduced Casting Defects: This irregularly shaped chill casting mold structure utilizes a rationally designed sprue between the runner and riser to regulate the flow rate of molten iron through cross-sectional changes. This reduces the impact of molten iron on the sand mold during flow, effectively minimizing sand mold damage caused by molten iron impact and thus reducing casting defects resulting from sand mold damage. Simultaneously, the overflow block at the end of the runner buffers and stores the molten iron from the front. Inclusions in the molten iron gradually float or settle within the overflow block, preventing them from flowing back with the molten iron, thereby reducing the generation of sand and slag defects inside and on the surface of the casting. After applying this technical solution, the proportion of shrinkage cavities and porosity defects at the flange and pipe ends of the casting body is significantly reduced, and sand and slag defects on the surface and inside the casting are effectively controlled, meeting the requirements for high-quality castings.

[0016] 3. Improve riser feeding efficiency: A larger riser is installed at the largest flange on the upper side of the casting, and two smaller risers are installed at the two smaller flanges on the lower side of the casting. Simultaneously, chills are installed at the pipe ends on both sides of the casting. The chills accelerate the cooling rate at the pipe ends while effectively widening the feeding distance of the remaining risers, thus improving the feeding efficiency of the risers and reducing the number of risers used at the pipe ends. This design allows the feeding effect of the risers to be fully utilized, reducing the number and volume of risers while ensuring casting quality.

[0017] 4. Improved process yield and quality: By using chills to assist in riser feeding, the number and volume of risers used are reduced, allowing more molten iron to be used in casting, thus improving the process yield. At the same time, the reduction in casting defects directly improves the quality, lowers production costs, and increases production efficiency.

[0018] 5. Reasonable and Flexible Structure: The horizontal sprue is designed as a trapezoidal strip structure, which facilitates stable flow of molten iron. The length of the sprue insert can be adjusted within a certain range. For example, the length of sprue insert one between horizontal sprue one and riser one is between 40 mm and 50 mm, and the length of sprue inserts between horizontal sprue two and risers two and three are both between 30 mm and 40 mm. This adjustability allows the model structure to adapt to the casting requirements of castings of different specifications and shapes, exhibiting strong flexibility and versatility. The riser shape is not limited to a frustum structure; it can also be rectangular, trapezoidal, or elliptical, further increasing the structural adaptability.

[0019] 6. Optimized Cooling Effect: Chills 1 and 2 are located on both sides of the casting body, 5 mm from the outer end face of the pipe opening. Both are annular structures with a diameter difference of 6 mm to 8 mm on each side and a height of 20 mm. This design can precisely control the cooling rate at the pipe opening of the casting, ensuring uniform cooling of all parts of the casting, reducing internal stress and deformation caused by uneven cooling, and improving the overall quality of the casting. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the irregular-shaped chill casting model of this utility model; Figure 2 This is a schematic diagram of the irregular-shaped chill casting model structure from another perspective.

[0021] Explanation of icon numbers: 1. Horizontal gating system; 2. Overflow block; 3. Inlet plate; 4. Riser; 5. Two horizontal gating channels; 6. Two overflow blocks; 7. Two inlet plates; 8. Two risers; 9. Three water inlet plates; 10. Three risers; 11. Casting body; 12. Chill 1; 13. Chill 2. Detailed Implementation

[0022] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0023] Please refer to Figures 1 to 2 As shown, an embodiment of this utility model provides a special-shaped chill casting model structure, including: a first sprue 1 and a second sprue 5 for casting special-shaped chills. The first sprue 1 and the second sprue 5 are respectively disposed on both sides of the casting body 11 to be cast and are interconnected with the casting body 11. Chills 12 and 23 are respectively disposed on both sides of the casting body 11.

[0024] To buffer and store molten iron, reducing sand and slag defects inside and on the surface of the casting, overflow block 2 is installed at the end of sprue 1, and overflow block 6 is installed at the end of sprue 2. Both sprue 1 and sprue 2 have trapezoidal strip-shaped cross-sections, which facilitates stable molten iron flow. Overflow blocks 2 and 6 are both frustum-shaped designs. Overflow block 2 is a frustum with an upper diameter of 25 mm, a lower diameter of 30 mm, and a height of 30 mm. Overflow block 6 is the same size as overflow block 2. The trapezoidal cross-section of the sprue stabilizes the molten iron flow and prevents violent fluctuations. The frustum-shaped overflow blocks effectively buffer the impact of molten iron and store the molten iron at the front, allowing inclusions in the molten iron to gradually float or settle inside the overflow blocks, preventing them from flowing back with the molten iron, thereby reducing sand and slag defects inside and on the surface of the casting.

[0025] To regulate the flow rate of molten iron and reduce its impact on the sand mold, a sprue 1-3 is installed between the sprue 1 and the casting body 11, and a riser 4 is installed between the sprue 1-3 and the casting body 11. Two channels are provided between the sprue 2-5 and the casting body 11; one channel has a sprue 3-9 and a riser 3-10, and the other channel has a sprue 2-7 and a riser 2-8. The cross-sectional area of ​​sprue 1-3 is slightly smaller than that of the sprue 1-1. The length of sprue 1-3 between the sprue 1-1 and riser 4 is between 40 mm and 50 mm and is adjustable. Sprue 2-7 and sprue 3-9 are both sheet-like structures with a width of 33 mm and a thickness of 3 mm. The sum of their cross-sectional areas is slightly smaller than the cross-sectional area of ​​the portion of the sprue 2-5 closest to sprue 2-7. The length of the sprue between the sprue 2-5 and risers 2-8 and 3-10 is between 30 mm and 40 mm. Riser 1-4 has an irregular structure and is connected to the flange face on the upper side of the casting body 11 through four transition sections. Riser 2-8 and Riser 3-10 are both frustum structures with a small upper diameter and a large lower diameter. In practical applications, the shape of the riser is not limited to a frustum structure; it can also be a rectangular, trapezoidal, or elliptical structure. Riser 2-8 and Riser 3-10 are connected to two flange faces on the lower side of the casting body 11 through two transition sections respectively. The molten iron flow rate can be adjusted by changing the cross-section of the molten iron, reducing the impact of molten iron on the sand mold and reducing casting defects caused by sand mold damage. The adjustable length of the molten iron flow rate can adapt to different casting needs. The design of risers with various shapes increases the adaptability of the structure. The riser is connected to the casting flange face through transition sections, which is conducive to the smooth entry of molten iron into the casting and improves the feeding effect.

[0026] To accelerate the cooling rate at the nozzle, effectively expand the feeding distance of other risers, improve the feeding efficiency of risers, and reduce the use of risers at the nozzle location, chills 12 and 23 are located on the left and right sides of the casting body 11, respectively, 5 mm from the outer end face of the nozzle. Both chills 12 and 23 are annular structures with a diameter difference of 6 mm to 8 mm on each side and a height of 20 mm. The annular chills precisely control the cooling rate at the nozzle of the casting, ensuring uniform cooling of all parts of the casting, reducing internal stress and deformation caused by uneven cooling, while improving the feeding efficiency of risers, reducing the number of risers used, and increasing the process yield.

[0027] The cross-sectional area of ​​the second horizontal sprue 5 near the third water inlet 9 is relatively large, about 1.7 times that of the first horizontal sprue 1. The cross-sectional area of ​​the left side of the second horizontal sprue 5 near the second water inlet 7 is slightly smaller than that of the first horizontal sprue 1. The cross-sections of the left and right sides of the second horizontal sprue 5 are different, with a transition connection 5 in the middle. This special cross-sectional design can reasonably distribute the flow of molten iron according to the flow requirements of molten iron, so that the molten iron flows more smoothly in the second horizontal sprue and further improves the casting quality.

[0028] All of the above structures need to be designed with corresponding fillets and draft angles according to the casting process. Designing fillets can avoid stress concentration and prevent cracks from forming in the casting during the casting process. Setting draft angles makes it easier to remove the sand mold from the mold, improves production efficiency, and ensures the dimensional accuracy of the casting.

[0029] The working principle of this utility model is as follows: In this structure, a larger riser 4 is set at the largest flange on the upper side of the casting body 11, and two smaller risers 8 and 10 are set at the two smaller flanges on the lower side of the casting body 11. At the same time, chills 12 and 13 are set at the pipe openings on the left and right sides of the casting body 11. While accelerating the cooling speed at the pipe openings, the chills effectively expand the feeding distance of the other risers, improve the feeding efficiency of the risers, and reduce the use of risers at the pipe opening positions. The molten iron flows in two directions. The molten iron on the upper side flows through the horizontal gating 1 and then through the end overflow block 2. The inclusions in the molten iron will gradually float or settle in the overflow block and will not be able to continue flowing in the opposite direction with the molten iron. Then the molten iron enters the riser 4 through the inlet plate 3. The molten iron on the lower side flows along the horizontal gating 25 and then through the end overflow block 26. The inclusions in the molten iron are also left in the overflow block. The molten iron is dispersed and flows into the inlet plate 27 and the inlet plate 39. The molten iron that passes through the inlet plate 27 will enter the riser 28, and the molten iron that passes through the inlet plate 39 will enter the riser 310. The molten iron that passes through riser 4, riser 28 and riser 310 will eventually enter the casting body 11. During the process of filling the casting body 11, the molten iron will pass through chills 12 and chills 23 respectively. Because fewer risers are used in the process, the yield rate is high. At the same time, the chills assist the risers in feeding, which improves the feeding effect and thus improves the product quality.

[0030] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention's conception through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A casting mold structure for irregularly shaped chills, comprising a first sprue (1) and a second sprue (5) for casting irregularly shaped chills, characterized in that, The first horizontal sprue (1) and the second horizontal sprue (5) are respectively located on both sides of the casting body (11) to be cast and are connected to the casting body (11). The two sides of the casting body (11) are respectively provided with chills (12) and chills (13).

2. The irregular-shaped chill casting model structure according to claim 1, characterized in that: A water inlet plate (3) is provided between the horizontal gating system (1) and the casting body (11), and a riser (4) is provided between the water inlet plate (3) and the casting body (11).

3. The irregular-shaped chill casting model structure according to claim 2, characterized in that: An overflow block (2) is also provided at the end of the horizontal gating channel (1).

4. The irregular-shaped chill casting model structure according to claim 3, characterized in that: Two channels are provided between the second horizontal gating channel (5) and the main body of the casting (11), one of which is provided with a water inlet plate three (9) and a riser three (10), and the other channel is provided with a water inlet plate two (7) and a riser two (8).

5. The irregular-shaped chill casting model structure according to claim 4, characterized in that: An overflow block (6) is also provided at the end of the second horizontal gating channel (5).

6. The irregular-shaped chill casting model structure according to claim 5, characterized in that: The cross-sections of both the first horizontal sprue (1) and the second horizontal sprue (5) are trapezoidal strip structures.

7. The irregular-shaped chill casting model structure according to claim 6, characterized in that: Both overflow block one (2) and overflow block two (6) are frustum-shaped designs.

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