Casting equipment for valve casting

Abstract

The invention discloses a casting device for valve casting, and relates to the technical field of valve production, the casting device comprises a support, and a rotating shaft is rotatably arranged on the support; and the two electric sliding tables are fixed to the support, a sand core feeding assembly is arranged on one electric sliding table, and a demolding powder spraying assembly is arranged on the other electric sliding table. The rotating seat can be driven by the power assembly to periodically start and stop, and the rotating angle of the rotating seat each time is 90 degrees, so that the four mold assemblies sequentially pass through a casting station, a discharging station, a spraying station and a mold closing station, the flow action of mold seat treatment, mold closing, casting and discharging is achieved, and therefore the production efficiency is improved. Casting work can be carried out in the blanking, cooling and die treatment processes, so that molten metal in the steel ladle can be rapidly output, the steel ladle standing time is shortened, the molten metal in the steel ladle is prevented from being condensed due to cooling, the secondary oxidation degree of the molten metal in the steel ladle can be reduced, and the product quality is improved while the valve production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of valve manufacturing technology, and in particular to a casting equipment for valve casting. Background Technology

[0002] Gravity casting is a casting process that uses the weight of molten metal to fill the mold. This process is also widely used in valve production. When molten metal is in the air, it is easy to react with oxygen to form oxides, which will reduce product quality. If the molten metal stays in the air for too long, it will also solidify due to cooling, which is not conducive to the casting process. In existing gravity casting processes, to avoid the aforementioned issues, the amount of molten metal poured each time is small. This necessitates multiple small-scale transfers of the molten metal during the casting process. This not only increases the time the molten metal remains in the air environment in the ladle but also requires the involvement of numerous transfer devices. Furthermore, the subsequent unloading and mold surface treatment processes further extend the time between casting operations, impacting production efficiency. Moreover, the longer the time, the more oxides accumulate in the molten metal in the ladle, leading to a decline in valve quality. Summary of the Invention

[0003] The purpose of this invention is to provide a casting apparatus for valve casting, so as to solve the technical problems in the prior art.

[0004] This invention provides a casting apparatus for valve casting, comprising: A bracket, on which a rotating shaft is rotatably mounted; Two electric slides are fixed to a bracket. One of the electric slides is equipped with a sand core feeding assembly, and the other electric slide is equipped with a release powder spraying assembly. A power assembly is fixed to a bracket and connected to a rotating shaft, and the power assembly is used to drive the rotating shaft to rotate. A rotating seat is fixedly sleeved on a rotating shaft. The rotating seat is provided with casting station, unloading station, spraying station and mold closing station arranged in a circular pattern at equal intervals. Four mold components are respectively fixed at the casting station, the unloading station, the spraying station and the mold closing station; The mold assembly includes: The fixing component is fixed to the rotating seat; Two mold bases are provided, and an adjustment component is provided on each of the two mold bases. The adjustment component is connected to a fixing component. The adjustment component is used to adjust the distance between the two mold bases. A sand core is provided between the two mold bases, and a protruding rod is provided on the side wall of the sand core.

[0005] Preferably, the fixing component includes: Two fixed frames are respectively fixed to the two side walls of the rotating base, and two guide rods are fixed on each fixed frame; A connecting frame is fixed to four guide rods.

[0006] Preferably, both mold bases have mold cavities, and each mold cavity has three positioning grooves and two through holes, and the sand core and the three positioning grooves are compatible.

[0007] Preferably, a push rod is slidably disposed in each of the through holes, and the two upper push rods are fixed to the connecting frame, while the two lower push rods are fixed to the two fixing frames respectively.

[0008] Preferably, the adjustment assembly includes two hydraulic push rods fixed on the connecting frame and two hydraulic push rods respectively fixed on two fixed frames. The telescopic ends of the two hydraulic push rods near the connecting frame are fixed to the upper mold seat, and the telescopic ends of the two hydraulic push rods near the fixed frame are fixed to the lower mold seat. Each mold seat has a connecting seat fixed on two side walls, and the four sets of connecting seats are slidably connected to four guide rods respectively.

[0009] Preferably, the core feeding assembly includes: An electric push rod, which is fixed to the moving end of an electric slide near the mold closing station; A fixed base is fixed to the telescopic end of the electric push rod. The top of the fixed base has a round hole that is compatible with the protruding rod. A support base is fixedly sleeved on a fixed base, and the curvature of the top end of the support base matches the curvature of the sand core.

[0010] Preferably, the release powder spraying assembly includes: A support rod, which is fixed to the moving end of the electric slide table at the spraying station; A feed pipe, which is fixed to the top of the support rod; A spraying stand is connected to a material supply pipe and the spraying stand and the material supply pipe are fixed together. Multiple spray nozzles are provided through the top and bottom of the spraying stand.

[0011] Preferably, both mold base sidewalls are provided with two second semicircular grooves, and both mold base sidewalls are provided with a first semicircular groove.

[0012] Preferred options also include: The material trough has two conveying channels fixed to its side wall, and the ends of the two conveying channels are fixed to one of the mold base side walls near the hydraulic push rod.

[0013] Preferably, the power assembly includes: The motor is fixed to the side wall of the bracket; The first transmission wheel and the second transmission wheel are rotatably mounted on the side wall of the bracket, and the second transmission wheel and the rotating shaft are fixed. A transmission belt, which is fitted onto a first transmission wheel and a second transmission wheel; An angle sensor is fixed on the side wall of the bracket and is used to detect the rotation angle of the shaft.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through the design of a rotating seat, a power assembly, and four mold assemblies, enables the rotating seat to be periodically started and stopped by the power assembly, with each rotation angle being 90 degrees. This allows the four mold assemblies to sequentially pass through the casting station, unloading station, spraying station, and mold closing station, achieving a streamlined process of mold seat processing, mold closing, casting, and material unloading. Therefore, casting can be performed during material unloading, cooling, and mold processing. Consequently, the molten metal in the ladle can be rapidly discharged, reducing the ladle's residence time and preventing condensation due to cooling. This also reduces secondary oxidation of the molten metal in the ladle, improving both valve production efficiency and product quality. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the power component of the present invention; Figure 3 This is a schematic diagram of the spraying base and spray head of the present invention; Figure 4 This is a schematic diagram of the sand core and mold base structure of the present invention; Figure 5 This is a schematic diagram of the sand core, protruding rod, and fixing seat structure of the present invention; Figure 6 This is a schematic diagram of the mold assembly structure of the present invention; Figure 7 This is a schematic diagram of the exploded structure of the mold base and sand core of the present invention.

[0017] Figure label: 1. Bracket; 2. Electric slide; 3. Rotating shaft; 4. Angle sensor; 5. Rotary seat; 6. Fixed frame; 7. Guide rod; 8. Connecting frame; 9. Mold base; 10. Material trough; 11. Support rod; 12. Electric push rod; 13. Motor; 14. First transmission wheel; 15. Second transmission wheel; 16. Transmission belt; 17. Spraying seat; 18. Spray nozzle; 19. Feed pipe; 20. Connecting seat; 21. Sand core; 22. Material conveying trough; 23. Fixed seat; 24. Support seat; 25. Protruding rod; 26. First semi-circular groove; 27. Second semi-circular groove; 28. Hydraulic push rod; 29. ​​Ejector rod; 30. Through hole; 31. Mold cavity; 32. Positioning groove. Detailed Implementation

[0018] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0020] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] The following is combined Figures 1 to 7As shown, an embodiment of the present invention provides a casting apparatus for valve casting, comprising: Support 1, on which a rotating shaft 3 is rotatably mounted; Two electric slides 2 are fixed to the bracket 1. One of the electric slides 2 is equipped with a sand core feeding component, and the other electric slide 2 is equipped with a release powder spraying component. The power assembly is fixed to the bracket 1 and connected to the rotating shaft 3. The power assembly is used to drive the rotating shaft 3 to rotate. Rotary seat 5 is fixedly sleeved on rotating shaft 3. The rotary seat 5 is provided with casting station, unloading station, spraying station and mold closing station at equal intervals in a circle. Four mold components are respectively fixed at the casting station, unloading station, spraying station and mold closing station; The mold components include: The fixing component and the rotating base 5 are fixed together; Two mold bases 9 are provided, and an adjustment component is provided on each mold base 9. The adjustment component is connected to the fixing component. The adjustment component is used to adjust the distance between the two mold bases 9. A sand core 21 is provided between the two mold bases 9, and a protruding rod 25 is provided on the side wall of the sand core 21.

[0024] When the rotating seat 5 rotates, it can drive the four mold components to pass through the casting station, unloading station, spraying station and mold closing station in sequence. During the casting process, the rotating seat 5 is fixed. At this time, the valve blank on the unloading station is cooled. On the spraying station, the two mold seats 9 are sprayed with release agent. On the mold closing station, the combined sand core 21 and the two mold seats 9 are combined. Before rotating again, the two mold seats 9 on the unloading station are separated, and the valve blank is unloaded under the action of gravity, thereby realizing the continuity of valve casting.

[0025] Furthermore, the fixing components include: Two fixed frames 6 are fixed on the two side walls of the rotating seat 5 respectively, and two guide rods 7 are fixed on each fixed frame 6; Connecting frame 8, and four guide rods 7 are fixed together.

[0026] Furthermore, each of the two mold bases 9 has a mold cavity 31, and each mold cavity 31 has three positioning grooves 32 and two through holes 30, and the sand core 21 is compatible with the three positioning grooves 32.

[0027] The positioning groove 32 in the mold cavity 31 and the protrusion at the end of the sand core 21 ensure that the sand core 21 is completely in the center of the two mold seats 21, thereby ensuring the uniformity of the valve blank wall thickness.

[0028] Furthermore, each through hole 30 is slidably provided with a push rod 29, and the two push rods 29 at the top are fixed to the connecting frame 8, while the two push rods 29 at the bottom are fixed to the two fixing frames 6 respectively.

[0029] Furthermore, the adjustment assembly includes two hydraulic push rods 28 fixed on the connecting frame 8 and two hydraulic push rods 28 respectively fixed on the two fixed frames 6. The telescopic ends of the two hydraulic push rods 28 near the connecting frame 8 are fixed to the upper mold seat 9, and the telescopic ends of the two hydraulic push rods 28 near the fixed frame 6 are fixed to the lower mold seat 9. Each mold seat 9 has a connecting seat 20 fixed on two side walls, and the four sets of connecting seats 20 are slidably connected to the four guide rods 7 respectively.

[0030] Furthermore, the core feeding assembly includes: Electric push rod 12, which is fixed on the moving end of the electric slide table 2 near the mold closing station; The fixed base 23 is fixed on the telescopic end of the electric push rod 12. The top of the fixed base 23 has a round hole, and the round hole is compatible with the protruding rod 25. Support 24 is fixedly sleeved on fixed base 23, and the curvature of the top of support 24 matches the curvature of sand core 21.

[0031] The protruding rod 25 on the sand core 21 and the round hole on the fixed seat 23 enable the fixed seat 23 to vertically transport the sand core 21 upward. The fixing of the top of the support seat 24 and the curvature of the sand core 21 itself can prevent the sand core 21 from deflecting during the upward transport, thus ensuring the positioning effect between the sand core 21 and the mold seat 9.

[0032] It is worth noting that the sand core 21 and the protruding rod 25 are integrally formed; Placing the sand core 21 on the fixed base 23 can be accomplished using a robotic arm, thereby improving the automation level of this equipment.

[0033] Furthermore, the release powder spraying component includes: Support rod 11, which is fixed to the moving end of the electric slide table 2 at the spraying station; Feed pipe 19, which is fixed to the top of support rod 11; The spraying base 17 is connected to the material supply pipe 19 and the spraying base 17 and the material supply pipe 19 are fixed. Multiple spray nozzles 18 are provided through the top and bottom of the spraying base 17.

[0034] The release powder is conveyed to the feed pipe 19 by a pneumatic conveying device, and then output through the spraying seat 17 and the nozzle 18 on the spraying seat 17. With the movement of the spraying seat 17 between the two mold seats 9, the release powder is evenly sprayed on the inner wall of the mold cavity 31 of the two mold seats 9. It is worth noting that the pneumatic conveying equipment described here is a device that uses flowing gas as a carrier to convey powder materials in the existing technology. Since it is a mature technology, it will not be described in detail.

[0035] Furthermore, each of the two mold bases 9 has two second semicircular grooves 27 on its sidewalls, and each of the two mold bases 9 has a first semicircular groove 26 on its sidewalls.

[0036] When the two mold bases 9 are combined, the two first semicircular grooves 26 form risers to store excess molten metal to compensate for the amount of collapse when the molten metal solidifies.

[0037] Furthermore, it also includes: The material trough 10 has two material conveying channels 22 fixed to its side wall, and the ends of the two material conveying channels 22 are fixed to the side wall of one of the mold bases 9 near the hydraulic push rod 28.

[0038] When the material tank 10 is in the casting position, it stores molten metal. During the rotation process, the molten metal in the material tank 10 enters the space between the two mold seats 9 through the casting holes formed by the two material conveying channels 22 and the two second semi-circular channels 27, so as to realize gravity casting.

[0039] Furthermore, the powertrain components include: Motor 13, motor 13 is fixed to the side wall of bracket 1; The first transmission wheel 14 and the second transmission wheel 15 are both rotatably mounted on the side wall of the bracket 1, and the second transmission wheel 15 and the rotating shaft 3 are fixed. A transmission belt 16 is fitted onto the first transmission wheel 14 and the second transmission wheel 15. Angle sensor 4 is fixed on the side wall of bracket 1 and is used to detect the rotation angle of rotating shaft 3.

[0040] The angle sensor 4 ensures that the rotating shaft 3 rotates 90 degrees each time.

[0041] The specific working method is as follows: When in use, turn on the switch of motor 13. When motor 13 is working, it drives the rotating shaft 3 to rotate through the first transmission wheel 14, the second transmission wheel 15 and the transmission belt 16. With the detection of angle sensor 4 and the control of motor 13, the rotating shaft 3 rotates only 90 degrees each time. By periodically starting motor 13, the four mold components on the rotating seat 5 are periodically started and stopped, and rotate 90 degrees each time. When the two mold seats 9 are in the casting position, the two mold seats 9 have closed. The second semi-circular groove 27 on the two mold seats 9 forms a casting hole, and the first semi-circular groove 26 on the two mold seats 9 forms a riser. At this time, the sand core 21 is inside the two mold seats 9. The gap shape between the sand core 21 and the mold cavity 31 on the two mold seats 9 is the shape of the valve body. The molten metal is injected into the material tank 10, and the motor 13 is started to make the two mold seats 9 rotate, so that the two mold seats 9 are transferred to the unloading position. During this process, the molten metal in the material tank 10 enters the gap between the mold cavity 31 and the sand core 21 through the material conveying channel 22 and the casting hole. The molten metal is cooled between the two mold seats 9 and forms a valve body blank. Before the rotating seat 5 rotates again, the two mold seats 9 on the unloading station are separated by controlling the hydraulic push rod 28. At this time, the valve body blank and sand core 21 between the two mold seats 9 are pushed out by the action of the push rod 29. Then the rotating seat 5 rotates, driving the two mold seats 9 to move to the spraying station. After the two mold seats 9 move to the spraying station, the corresponding electric slide table 2 is switched on. The support rod 11 drives the feeding pipe 19 and the spraying seat 17 to move, so that the spraying seat 17 passes between the two mold seats 9. During this process, the demolding powder is injected into the feeding pipe 19 through the pneumatic conveying equipment. The demolding powder in the feeding pipe 19 is then output through the spraying seat 17 and the nozzle 18 on the spraying seat 17. With the movement of the spraying seat 17 between the two mold seats 9, the demolding powder is evenly sprayed on the inner wall of the mold cavity 31 of the two mold seats 9. When the rotating seat 5 rotates again, it moves the two mold seats 9 for spraying release powder to the mold closing position. At this time, the protruding rod 25 on the sand core 21 is inserted into the round hole on the fixed seat 23. The sand core 21 and the fixed seat 23 are positioned by the curvature of the top of the support seat 24 and the curvature of the sand core 21. The switch of the electric push rod 12 is turned on, and the sand core 21 is pushed between the two mold seats 9 by the electric push rod 12. Then the switches of the two sand cores 21 are turned on, so that the two mold seats 9 are closed. During this process, the sand core 21 is repositioned by the positioning groove 32, so that the sand core 21 is at the center of the two mold seats 9. In summary, during the valve production process, the rotation of the rotary seat 5 drives the four mold components to move sequentially between the casting station, unloading station, spraying station, and mold closing station, respectively performing casting, unloading, demolding powder spraying, and mold closing. This reduces the gaps in gravity casting production, improves production smoothness, and avoids secondary oxidation of molten metal caused by excessive transfer distances or residence times. Therefore, this equipment improves both valve production efficiency and valve product quality.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A casting apparatus for valve casting, characterized in that, include: A bracket (1) is rotatably mounted on the bracket (1); Two electric slides (2), both of which are fixed to the bracket (1), one of which is equipped with a sand core feeding assembly and the other is equipped with a release powder spraying assembly; A power assembly is fixed to a bracket (1) and connected to a rotating shaft (3). The power assembly is used to drive the rotating shaft (3) to rotate. Rotary seat (5), the rotary seat (5) is fixedly sleeved on the rotating shaft (3), and the rotary seat (5) is provided with casting station, unloading station, spraying station and mold closing station at equal intervals in a circle; Four mold components are respectively fixed at the casting station, the unloading station, the spraying station and the mold closing station; The mold assembly includes: A fixing component is provided, which is fixed to the rotating seat (5); Two mold bases (9) are provided with adjustment components, which are connected to a fixing component. The adjustment components are used to adjust the distance between the two mold bases (9). A sand core (21) is provided between the two mold bases (9). A protruding rod (25) is provided on the side wall of the sand core (21).

2. The casting equipment for valve casting according to claim 1, characterized in that, The fixing component includes: Two fixed frames (6) are fixed on the two side walls of the rotating seat (5), and two guide rods (7) are fixed on each fixed frame (6). A connecting frame (8) is fixed together with four guide rods (7).

3. A casting apparatus for valve casting according to claim 2, characterized in that, Both mold bases (9) are provided with mold cavities (31), and each mold cavity (31) is provided with three positioning grooves (32) and two through holes (30), and the sand core (21) and the three positioning grooves (32) are compatible.

4. A casting apparatus for valve casting according to claim 3, characterized in that, Each of the through holes (30) is slidably provided with a top rod (29), and the two top rods (29) at the top are fixed to the connecting frame (8), while the two top rods (29) at the bottom are fixed to the two fixing frames (6) respectively.

5. A casting apparatus for valve casting according to claim 1, characterized in that, The adjustment assembly includes two hydraulic push rods (28) fixed on the connecting frame (8) and two hydraulic push rods (28) respectively fixed on the two fixed frames (6). The telescopic ends of the two hydraulic push rods (28) near the connecting frame (8) are fixed to the upper mold seat (9), and the telescopic ends of the two hydraulic push rods (28) near the fixed frame (6) are fixed to the lower mold seat (9). Each mold seat (9) has two side walls fixed with connecting seats (20), and the four sets of connecting seats (20) are slidably connected to the four guide rods (7) respectively.

6. A casting apparatus for valve casting according to claim 1, characterized in that, The core feeding assembly includes: Electric push rod (12), which is fixed on the moving end of the electric slide (2) near the mold closing station; The fixed seat (23) is fixed on the telescopic end of the electric push rod (12). The fixed seat (23) has a round hole at the top and the round hole is compatible with the protruding rod (25). Support base (24), which is fixedly sleeved on the fixed base (23), and the curvature of the top end of the support base (24) matches the curvature of the sand core (21).

7. A casting apparatus for valve casting according to claim 1, characterized in that, The release powder spraying assembly includes: Support rod (11), which is fixed to the moving end of the electric slide table (2) at the spraying station; Feed pipe (19), which is fixed to the top of support rod (11); Spraying base (17), the spraying base (17) and the material supply pipe (19) are connected and fixed, and multiple spray nozzles (18) are provided through the top and bottom of the spraying base (17).

8. A casting apparatus for valve casting according to claim 1, characterized in that, Two second semicircular grooves (27) are provided on the side walls of both mold bases (9), and a first semicircular groove (26) is provided on the side walls of both mold bases (9).

9. A casting apparatus for valve casting according to claim 8, characterized in that, Also includes: Material trough (10), the side wall of which is fixed with two material conveying troughs (22), and the ends of the two material conveying troughs (22) are fixed to the side wall of one of the mold bases (9) near the hydraulic push rod (28).

10. A casting apparatus for valve casting according to claim 1, characterized in that, The power assembly includes: Motor (13), the motor (13) and the side wall of bracket (1) are fixed; The first transmission wheel (14) and the second transmission wheel (15) are rotatably mounted on the side wall of the bracket (1), and the second transmission wheel (15) and the rotating shaft (3) are fixed. A transmission belt (16) is fitted onto the first transmission wheel (14) and the second transmission wheel (15); Angle sensor (4) is fixed on the side wall of bracket (1) and is used to detect the rotation angle of the shaft (3).

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