Large-flow low-flow-speed sprue system for vertical line molding line production

Abstract

The utility model relates to the technical field of mold runners, in particular to a high-flow low-flow-speed sprue system for vertical line molding line production, which is applied to a mold and comprises a cross gate and a sprue cup mounted on the cross gate and communicated with the cross gate, a sprue body is connected to a discharge position of the cross gate, and the sprue body is connected with a sprue gate. The sprue body is connected with a plurality of cavities, flow gates are arranged between the sprue body and the cavities, the cavities are arranged in three rows in the mold, a primary buffer part is arranged between the first row of cavities and the second row of cavities, and a secondary buffer part is arranged between the second row of cavities and the third row of cavities. And the sprue body, the first-stage buffer part and the second-stage buffer part are communicated with one another. According to the utility model, the cross runner, the straight runner body and the inner gate are modified, and large-particle impurities of molten iron are collected layer by layer, so that the purity of the molten iron flowing at a high speed is improved.

Description

Technical Field

[0001] This utility model relates to the field of mold runner technology, specifically a high-flow-rate, low-velocity direct sprue system for vertical molding line production. Background Technology

[0002] Currently, the cast iron parts of air conditioner compressors are mainly made of synthetic cast iron composed of scrap steel, carbon raisers and recycled iron. Its mechanical properties are superior to those of traditional pig iron + scrap steel + recycled iron. Due to the large amount of scrap steel used, there is relatively more slag in the molten iron. Although efficient slag collectors are used to clean it, it cannot be completely removed in high-speed mass production. Some slag will remain in the molten iron, eventually resulting in poor slag porosity.

[0003] The current DISA vertical molding line has a production efficiency of 550 molds / hour, a molten iron flow rate of 4-5 kg / s, a molten iron weight of 1.0-1.2 tons in the bottom-pouring ladle, a static pressure height of 400-500 mm at the outlet, and a pouring cup height of 200 mm above the sand mold. Modern air conditioning compressor cast iron parts are primarily designed for lightweighting, with numerous hollowed-out weight-reduction grooves and complex casting appearances. High-flow-rate molten iron filling can easily cause sand erosion, resulting in poor casting quality with sand porosity. Utility Model Content

[0004] The purpose of this invention is to provide a high-flow-rate, low-velocity sprue system for vertical molding line production. By modifying the cross runner, the runner, and the ingate, large particulate impurities in the molten iron are collected layer by layer, thereby improving the purity of the high-speed flowing molten iron.

[0005] To address the problems of existing technologies, this utility model provides a high-flow-rate, low-velocity sprue system for vertical molding line production. Applied in a mold, it includes a horizontal sprue and a sprue cup installed on and connected to the horizontal sprue. The discharge end of the horizontal sprue is connected to the sprue body, which is connected to several cavities. An ingate is provided between the sprue body and the cavities. The cavities are arranged in three rows in the mold. A primary buffer section is provided between the first and second rows of cavities, and a secondary buffer section is provided between the second and third rows of cavities. The sprue body, the primary buffer section, and the secondary buffer section are interconnected.

[0006] Preferably, the horizontal runner is configured as a rectangle of 4.5×100mm.

[0007] Preferably, the primary buffer section includes a first flow channel that is connected to the material inlet direction of the sprue body, and the primary buffer section also includes a second flow channel that is connected to the material outlet direction of the sprue body, and a cavity is provided between the first flow channel and the second flow channel.

[0008] Preferably, the first flow channel opening is a rectangle with dimensions of 5.5 × 45 mm, and the second flow channel opening is a rectangle with dimensions of 5.0 × 45 mm.

[0009] Preferably, the cross-section of the cavity between the first flow channel opening and the second flow channel opening is trapezoidal, and the height of the trapezoid is 25mm.

[0010] Preferably, the secondary buffer section includes a third flow channel that is connected to the material inlet direction of the sprue body, and the secondary buffer section also includes a fourth flow channel that is connected to the material outlet direction of the sprue body, and a cavity is provided between the third flow channel and the fourth flow channel.

[0011] Preferably, the third flow channel is a rectangle with dimensions of 4.2 × 40 mm, and the fourth flow channel is a rectangle with dimensions of 3.2 × 40 mm.

[0012] Preferably, the cross-section of the cavity between the third flow channel and the fourth flow channel is trapezoidal, and the height of the trapezoid is 20mm.

[0013] Preferably, the ingate is a sprue with a single-sided arc of 63×1mm.

[0014] The advantages of this utility model compared to the prior art are:

[0015] 1. This application changes the 23×20mm horizontal sprue in the original mold to a 4.5×110 rectangle, thereby blocking slag and sand with a diameter greater than 4.5mm above the horizontal sprue and preventing 4.5mm slag and sand from entering the sprue body.

[0016] 2. The application proposes to change the first runner opening on the main body of the sprue in the original mold to a rectangle of 5.5×45, and the second runner opening to a rectangle of 5.0×45, and the cavity between the first runner opening and the second runner opening to be a trapezoid with a height of 25mm, so as to store the excess molten iron in the trapezoidal cavity with a height of 25mm. The third runner on the original sprue body was changed to a 4.2×40mm rectangle, and the fourth runner was changed to a 3.2×40mm rectangle. Excess molten iron was stored in a cavity with a height of 20mm, and impurities such as sand and slag with a diameter greater than 3.2mm were also stored in a cavity with a height of 20mm. The original ingate was changed to a single-sided arc-shaped 63×1mm sprue, which blocked impurities such as slag or sand with a diameter greater than 1.0mm outside the sprue. By slowing down the flow of molten iron and collecting large particles of impurities in the molten iron layer by layer, the purity of the high-speed flowing molten iron was improved, and the quality of the casting surface and machined surface was guaranteed. The machining defect rate of the casting was less than 1.2%. Attached Figure Description

[0017] Figure 1This is a front view structural diagram of a high-flow-rate, low-velocity direct gating system for vertical line molding production, according to this utility model.

[0018] Figure 2 This utility model relates to a high-flow-rate, low-velocity direct gating system for vertical molding line production. Figure 1 Schematic diagram of the cross-sectional structure at point A in the middle.

[0019] Figure 3 This utility model relates to a high-flow-rate, low-velocity direct gating system for vertical molding line production. Figure 1 Schematic diagram of the cross-sectional structure at point B.

[0020] Figure 4 This utility model relates to a high-flow-rate, low-velocity direct gating system for vertical molding line production. Figure 1 Schematic diagram of the cross-sectional structure at point C.

[0021] The numbers in the diagram are: 1. Sprue cup; 2. Stream runner; 3. Sprue body; 4. Primary buffer section; 41. First runner inlet; 42. Second runner inlet; 5. Secondary buffer section; 51. Third runner inlet; 52. Fourth runner inlet; 6. Ingate; 7. Cavity. Detailed Implementation

[0022] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0023] Reference Figures 1-4 As shown, this utility model provides a high-flow-rate, low-velocity sprue system for vertical molding line production, applied in a mold. It includes a horizontal sprue 2 and a sprue cup 1 installed on and connected to the horizontal sprue 2. The sprue body 3 is connected to the outlet of the horizontal sprue 2, and the sprue body 3 is connected to several cavities 7. The sprue cup 1 serves as the inlet for molten metal, receiving molten metal from external casting equipment and guiding it to the horizontal sprue 2. The cup-shaped structure of the sprue cup 1 buffers the impact force of the molten metal, reducing splashing. An ingate 6 is provided between the sprue body 3 and the cavities 7. The ingate 6 controls the flow rate and velocity of the molten metal entering the cavities 7, preventing the molten metal from directly impacting the inner wall of the cavities 7 and improving the surface quality of the casting. The cavities 7 are arranged in three rows in the mold. A primary buffer section 4 is provided between the first and second rows of cavities 7, and a secondary buffer section 5 is provided between the second and third rows of cavities 7. The sprue body 3, the primary buffer section 4, and the secondary buffer section 5 are interconnected. The horizontal sprue 2 is designed as a rectangle of 4.5 × 100 mm. It guides the molten metal laterally from the pouring cup to the sprue body. The horizontal sprue 2, with its 4.5 × 100 mm rectangular dimensions, controls the flow rate through its cross-sectional area, achieving a "low flow rate" design while ensuring high flow rate requirements.

[0024] By changing the original 23×20mm horizontal sprue 2 in the mold to a 4.5×110 rectangle, slag and sand with a diameter greater than 4.5mm are blocked on the horizontal sprue 2, preventing 4.5mm slag and sand from entering the sprue body 3.

[0025] The primary buffer section 4 includes a first runner opening 41 connected to the material inlet direction of the sprue body 3, and a second runner opening 42 connected to the material outlet direction of the sprue body 3. A cavity is provided between the first runner opening 41 and the second runner opening 42. The first runner opening 41 is a rectangle of 5.5×45mm, and the second runner opening 42 is a rectangle of 5.0×45mm. The cross-section of the cavity between the first runner opening 41 and the second runner opening 42 is trapezoidal, and the height of the trapezoid is 25mm.

[0026] The first flow channel 41 serves as the inlet for the molten metal to flow into the primary buffer section 4. Its relatively large cross-sectional area (5.5 mm width) reduces the inlet flow velocity and minimizes the impact of the molten metal on the inner wall of the buffer section. The second flow channel 41 serves as the outlet for the molten metal to flow out of the primary buffer section 4. Its cross-sectional area is slightly smaller than that of the first flow channel 41. By reducing the cross-sectional area, the outlet flow velocity is moderately increased, propelling the molten metal into the cavity. The cavity volume buffers fluctuations in molten metal pressure, ensuring uniform filling of the multiple rows of cavities 7.

[0027] The secondary buffer section 5 includes a third runner opening 51 connected to the material inlet direction of the sprue body 3, and a fourth runner opening 52 connected to the material outlet direction of the sprue body 3. A cavity is provided between the third runner opening 51 and the fourth runner opening 52. The third runner opening 51 is a rectangle with dimensions of 4.2 × 40 mm, and the fourth runner opening 52 is a rectangle with dimensions of 3.2 × 40 mm. The cross-section of the cavity between the third runner opening 51 and the fourth runner opening 52 is trapezoidal, and the height of the trapezoid is 20 mm.

[0028] The third flow channel 51 serves as the inlet for the molten metal to flow into the secondary buffer section 5. Its cross-sectional area is reduced by approximately 24% compared to the first flow channel 41, increasing the inlet flow velocity to meet the filling requirements of the second row of cavities 7. The fourth flow channel 52 serves as the outlet for the molten metal to flow out of the secondary buffer section 5. Its cross-sectional area is further reduced by approximately 29%. This significant reduction in cross-sectional area results in a marked increase in the outlet flow velocity, propelling the molten metal towards the third row of cavities 7.

[0029] The inner gate 6 is a 63×1mm single-sided arc inlet. The single-sided arc design allows the molten metal to flow along the arc-shaped surface, forming a laminar flow state and reducing the scouring of the casting surface by turbulence. The slit-type inlet regulates the pressure of the molten metal through local resistance, ensuring uniform filling of the multiple rows of cavities 7 and avoiding local overheating or cold shut defects.

[0030] The first runner 41 on the original mold sprue body 3 is changed to a rectangle of 5.5×45, and the second runner 42 is changed to a rectangle of 5.0×45. The cavity between the first runner 41 and the second runner 42 is a trapezoid with a height of 25mm, so that excess molten iron is stored in the trapezoidal cavity with a height of 25mm. The third runner 51 on the original sprue body 3 of the mold was changed to a rectangle of 4.2×40mm, and the fourth runner 52 was changed to a rectangle of 3.2×40mm. Excess molten iron was stored in a cavity with a height of 20mm. Impurities such as sand and slag with a diameter greater than 3.2mm were also stored in a cavity with a height of 20mm. The original ingate 6 was changed to a single-sided arc-shaped 63×1mm sprue to block impurities such as slag or sand with a diameter greater than 1.0mm outside the sprue. By slowing down the flow of molten iron and collecting large particles of impurities in the molten iron layer by layer, the purity of the high-speed flowing molten iron was improved, and the quality of the casting surface and machined surface was guaranteed. The machining defect rate of the casting was less than 1.2%.

[0031] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A high flow low velocity sprue system for vertical profile line production, applied in a mold, characterized in that: The application relates to a sprue cup (1) and a runner (2) which are arranged in communication with each other, wherein the runner (2) is connected with a straight runner body (3), the straight runner body (3) is connected with a plurality of cavities (7), an inner gate (6) is arranged between the straight runner body (3) and the cavities (7), three rows of cavities (7) are arranged in a mold, a first-stage buffer part (4) is arranged between the first row of cavities (7) and the second row of cavities (7), a second-stage buffer part (5) is arranged between the second row of cavities (7) and the third row of cavities (7), and the straight runner body (3), the first-stage buffer part (4) and the second-stage buffer part (5) are in communication.

2. A high flow low velocity sprue system for vertical linear molding line production as claimed in claim 1 wherein: The runner (2) is arranged in the shape of a rectangle with a length of 4.5 mm and a width of 100 mm.

3. A high flow low velocity sprue system for vertical linear molding line production as claimed in claim 1 wherein: The first-stage buffer part (4) comprises a first flow channel opening (41) which is in communication with the feeding direction of the straight runner body (3), the first-stage buffer part (4) further comprises a second flow channel opening (42) which is in communication with the discharging direction of the straight runner body (3), and a cavity is further arranged between the first flow channel opening (41) and the second flow channel opening (42).

4. A high flow low velocity sprue system for vertical linear molding line production as claimed in claim 3 wherein: The first flow channel opening (41) is in the shape of a rectangle with a length of 5.5 mm and a width of 45 mm, and the second flow channel opening (42) is in the shape of a rectangle with a length of 5.0 mm and a width of 45 mm.

5. A high flow low velocity sprue system for vertical linear molding line production as claimed in claim 3 wherein: The cavity arranged between the first flow channel opening (41) and the second flow channel opening (42) is in the shape of a trapezoid with a height of 25 mm.

6. A high flow low velocity sprue runner system for vertical linear molding line production as claimed in claim 1 wherein: The second-stage buffer part (5) comprises a third flow channel opening (51) which is in communication with the feeding direction of the straight runner body (3), the second-stage buffer part (5) further comprises a fourth flow channel opening (52) which is in communication with the discharging direction of the straight runner body (3), and a cavity is further arranged between the third flow channel opening (51) and the fourth flow channel opening (52).

7. A high flow low velocity sprue system for vertical linear molding line production as claimed in claim 6 wherein: The third flow channel opening (51) is in the shape of a rectangle with a length of 4.2 mm and a width of 40 mm, and the fourth flow channel opening (52) is in the shape of a rectangle with a length of 3.2 mm and a width of 40 mm.

8. A high flow low velocity sprue system for vertical linear molding line production as claimed in claim 6 wherein: The cavity arranged between the third flow channel opening (51) and the fourth flow channel opening (52) is in the shape of a trapezoid with a height of 20 mm.

9. A high flow low velocity sprue runner system for vertical linear molding line production as claimed in claim 1 wherein: The inner gate (6) is a water inlet with a single-side arc of 63 mm and a thickness of 1 mm.

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