Rotary multi-station aluminum alloy part low-pressure casting equipment

Abstract

The invention discloses rotary multi-station aluminum alloy part low-pressure casting equipment, and relates to the technical field of aluminum alloy low-pressure casting, three stations distributed in a surrounding mode are arranged, a mold is arranged on each station, and the internal spaces of a first cavity, a second cavity and a third cavity in the three molds are increased progressively, so that the inner space of the first cavity, the inner space of the second cavity and the inner space of the third cavity are increased progressively; and in cooperation with grabbing and carrying operation of the rotary carrying mechanism, a primary forming object produced in the first mold can be carried into the second mold for secondary casting, a secondary forming object produced in the second mold can be carried into the third mold for tertiary casting, the local casting process is tighter, the shrinkage porosity phenomenon can be effectively reduced, and the production efficiency is improved. Through multi-layer low-pressure casting, not only can the mold filling smoothness be further improved, but also the internal texture compactness of the aluminum alloy part can be effectively improved, and the structural firmness of the aluminum alloy part after low-pressure casting can be effectively improved in cooperation with gradual wrapping type casting production from inside to outside.

Description

Technical Field

[0001] This invention relates to the field of low-pressure casting technology for aluminum alloys, and more particularly to a rotary multi-station low-pressure casting equipment for aluminum alloy parts. Background Technology

[0002] In the field of dental medical devices, aluminum alloys are widely used in the manufacture of key components such as dental chair frames and treatment device main frames due to their excellent strength, corrosion resistance and lightweight properties. In the existing technology, low-pressure casting equipment is usually used to produce such aluminum alloy parts.

[0003] When low-pressure casting aluminum alloy parts for dental medical devices, a single-stage molding process is typically used. The entire process of filling, solidifying, and forming the aluminum alloy part is completed in one go using a single mold. However, this process has significant limitations when dealing with larger aluminum alloy parts. In the single-stage molding process, the solidification path of the molten aluminum alloy is long and the solidification time varies greatly. Due to the shrinkage characteristics of the molten alloy itself, defects such as shrinkage cavities and porosity are easily formed inside the casting. This results in insufficient structural integrity of the parts, reduced mechanical properties, and difficulty in meeting the stringent structural stability requirements of dental medical devices. It can also negatively impact the quality of the molded products. Summary of the Invention

[0004] The purpose of this invention is to solve the problem in the prior art that the single-molding process used in low-pressure casting of large-sized aluminum alloy parts for dental medical devices easily leads to shrinkage porosity during solidification, which affects the structural stability of the product after molding. Therefore, this invention proposes a rotary multi-station low-pressure casting equipment for aluminum alloy parts.

[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution: A rotary multi-station low-pressure casting equipment for aluminum alloy parts includes a machine base. Columns are fixed at each of the four corners of the machine base's top. A top plate is fixed to the top of each column, and a lifting plate is slidably connected to the column. A first hydraulic push rod is fixed to the top of the top plate, and the telescopic end of the first hydraulic push rod is connected to the lifting plate. A crucible is installed inside the machine base, and a feed pipe and a pneumatic pipe extending to the outside of the machine base are connected to the crucible. Three surrounding workstations are arranged between the machine base and the lifting plate. Each workstation is equipped with a liquid riser pipe that extends downwards to the crucible. Inside, a first mold, a second mold, and a third mold are installed sequentially in three workstations. The first mold has a first cavity, the second mold has a second cavity, and the third mold has a third cavity. The dimensions of the first cavity, the second cavity, and the third cavity gradually increase. The additional space in the second cavity compared to the first cavity, and the additional space in the third cavity compared to the second cavity, are all equal to the space in the first cavity. A rotating conveying mechanism that acts between the first mold, the second mold, and the third mold is installed on the top of the machine.

[0006] Preferably, the first mold includes a first lower mold body fixedly installed on the top of the machine base and a first upper mold body fixedly installed on the bottom of the lifting plate. A plurality of first cavities are evenly opened on the mating surface between the first lower mold body and the first upper mold body. A first injection channel connected to the liquid riser is opened in the first lower mold body. A first flow channel connecting the first cavity and the first injection channel is opened on the mating surface between the first lower mold body and the first upper mold body. The second mold includes a second lower mold body fixedly installed on the top of the machine base and a second upper mold body fixedly installed on the bottom of the lifting plate. A plurality of second cavities are evenly opened on the mating surface between the second lower mold body and the second upper mold body. A second injection channel connected to the liquid riser is opened in the second lower mold body. A first clamping groove and a second flow channel connected between the second cavity and the second injection channel are opened on the mating surface between the second lower mold body and the second upper mold body. The first clamping groove and the first flow channel are correspondingly arranged. The third mold includes a third lower mold body fixedly installed on the top of the machine base and a third upper mold body fixedly installed on the bottom of the lifting plate. Numerous third cavities are evenly opened on the mating surface between the third lower mold body and the third upper mold body. A third injection channel connected to the liquid riser is opened in the third lower mold body. A second clamping groove, a third clamping groove and a third flow channel are opened on the mating surface between the third lower mold body and the third upper mold body, which are connected between the third cavity and the third injection channel. The second clamping groove is corresponding to the first flow channel and the third clamping groove is corresponding to the second flow channel.

[0007] Preferably, the positions of the first clamping groove and the second flow channel are staggered, and the positions of the second clamping groove, the third clamping groove and the third flow channel are staggered.

[0008] Preferably, a closing port is provided in the first flow channel, the first clamping groove, the second flow channel, the second clamping groove, the third clamping groove, and the third flow channel. The closing port in the third flow channel is located at the communication position between the third flow channel and the third cavity. The closing ports in the first flow channel, the first clamping groove, the second flow channel, the second clamping groove, and the third clamping groove are all corresponding to the closing port in the third flow channel.

[0009] Preferably, ejector plates are slidably installed in the first lower mold body, the first upper mold body, the second lower mold body, the second upper mold body, the third lower mold body, and the third upper mold body. Ejector plates are fixed with evenly distributed ejector bodies. A first spring for elastically supporting the ejector plates is installed in the first lower mold body, the first upper mold body, the second lower mold body, the second upper mold body, the third lower mold body, and the third upper mold body. A second hydraulic push rod for pushing the ejector plates in the first lower mold body, the second lower mold body, and the third lower mold body is installed in the machine tool. A third hydraulic push rod for pushing the ejector plates in the first upper mold body, the second upper mold body, and the third upper mold body is installed on the lifting plate.

[0010] Preferably, the rotary conveying mechanism includes a column fixed at the middle position of the top of the machine platform, and a sleeve is movably sleeved on the outer side of the column. Three grippers are fixed on the outer end wall of the sleeve and distributed around it. Numerous evenly distributed vertical tubes are slidably inserted into the grippers. A suction cup is fixedly installed at the bottom end of the vertical tube, and a second spring is fixedly connected between the top end of the vertical tube and the gripper.

[0011] Preferably, a groove is provided on the cylindrical surface of the column rod, and the groove is formed by three interconnected V-shaped grooves distributed in a ring. A pin rod is fixed on the inner end wall of the sleeve and slidably inserted into the groove.

[0012] Preferably, the bottom of the top plate has a rotatable shaft sleeve that is movably fitted on the outside of the sleeve. The outer dimension of the sleeve is set as a prism structure, and the inner dimension of the shaft sleeve is adapted to the outer dimension of the sleeve. A servo motor for driving the shaft sleeve to rotate is fixed on the top of the top plate.

[0013] Preferably, a first air pipe is provided at the top of the top plate, a vacuum generator is fixed on the gripper, and the negative pressure suction port of the vacuum generator is connected to the top of the vertical pipe. A first ring pipe is fixed at the bottom of the top plate and arranged around the shaft cylinder, and the first ring pipe is connected to the first air pipe. The bottom of the first ring pipe is rotatably connected to a second ring pipe that is fixedly connected to the shaft cylinder. A second air pipe is connected between the second ring pipe and the air inlet of the vacuum generator. A magnetic control valve installed in the second air pipe is fixed on the gripper.

[0014] Preferably, the top of the machine is provided with a feeding area between the third mold and the first mold, and a conveyor belt extending to the outside of the machine is fixed on the feeding area. The magnetic valve includes a valve body fixedly connected in the second air pipe, and a vertically arranged valve plate is inserted in the valve body. A third spring for elastic support of the valve plate is fixed on the valve body. A magnet is fixed in the feeding area below the magnetic valve, and the valve plate is made of magnetically conductive material.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, three surrounding workstations are set up, and a mold is set up at each workstation. The internal space of the first cavity, the second cavity, and the third cavity in the three molds increases progressively. With the gripping and transporting operation of the rotary conveying mechanism, the one-time molded part produced in the first mold can be transported to the second mold for secondary casting, and the two-time molded part produced in the second mold can be transported to the third mold for tertiary casting. The local casting process is more compact, which can effectively reduce shrinkage porosity. Through multi-layer low-pressure casting, not only can the filling smoothness be further improved, but the internal texture of the aluminum alloy part can also be effectively improved. With the casting production of gradually wrapping from the inside to the outside, the structural strength of the aluminum alloy part after low-pressure casting can be effectively improved. 2. In this invention, by movably installing the ejector pin body inside the first lower mold body, the first upper mold body, the second lower mold body, the second upper mold body, the third lower mold body, and the third upper mold body, and pushing it from below with the aid of the second hydraulic push rod and pushing it from above with the aid of the third hydraulic push rod, the molded object can be smoothly separated from the first upper mold body, the second upper mold body, and the third upper mold body during the mold opening process. This allows the molded object to be temporarily retained inside the first lower mold body, the second lower mold body, and the third lower mold body, facilitating the precise positioning and gripping of the molded object by the rotary conveying mechanism. Furthermore, the pushing of the second hydraulic push rod and the gripping and lifting of the rotary conveying mechanism work together to improve the smoothness of demolding. 3. In this invention, by setting the unloading area between the third mold and the first mold, the rotary conveying mechanism will pass over the top of the unloading area when it takes the complete product out of the third mold. Then, through the cooperation of the magnetic valve and the magnet, the rotary conveying mechanism will automatically release the grip on the complete product when it passes over the conveyor belt, and automatically put the complete product down onto the conveyor belt for conveying and export. This is conducive to the automatic realization of continuous material discharge operation, and thus helps to improve production efficiency. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a perspective view of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 For the present invention Figure 3 Sectional view at point AA; Figure 5 For the present invention Figure 3 Sectional view at point BB; Figure 6 For the present invention Figure 3 Sectional view at CC; Figure 7 For the present invention Figure 3 Sectional view at point DD; Figure 8 This is a perspective view of the crucible and riser tube of the present invention; Figure 9 This is a perspective view of the first lower mold body, the second lower mold body, and the third lower mold body of the present invention; Figure 10 This is a perspective view of the rotary conveying mechanism of the present invention; Figure 11 This is an exploded view of the slide and pin of the present invention; Figure 12 This is an exploded view of the magnetically controlled valve of the present invention.

[0017] In the picture: 1. Machine base; 101. Column; 102. Top plate; 103. Lifting plate; 104. First hydraulic push rod; 105. Crucible; 106. Feed pipe; 107. Air pressure pipe; 108. Liquid riser pipe; 2. First lower mold body; 201. First upper mold body; 202. First cavity; 203. First injection channel; 204. First runner; 3. Second lower mold body; 301. Second upper mold body; 302. Second cavity; 303. Second injection channel; 304. First clamping groove; 305. Second runner; 4. Third lower mold body; 401. Third upper mold body; 402. Third cavity; 403. Third injection channel; 404. Second clamping groove; 405. Third clamping groove; 406. Third runner; 5. Ejector plate; 501. Ejector body; 502. First spring; 503. Second hydraulic push rod; 504. Third hydraulic push rod; 6. Column rod; 601. Sleeve; 602. Gripper; 603. Vertical tube; 604. Suction cup; 605. Second spring; 606. Slide groove; 607. Pin rod; 608. Shaft cylinder; 609. Servo motor; 7. First air pipe; 701. Vacuum generator; 702. First ring pipe; 703. Second ring pipe; 704. Second air pipe; 705. Magnetic control valve; 7051. Valve body; 7052. Valve plate; 7053. Third spring; 706. Magnet; 8. Unloading area; 801. Conveyor belt. Detailed Implementation

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

[0019] Example: This example provides a rotary multi-station low-pressure casting equipment for aluminum alloy parts. See [link to example]. Figure 1 - Figure 12 Specifically, the machine includes a machine base 1, with columns 101 fixed at the four corners of the top of the machine base 1. A top plate 102 is fixed to the top of the columns 101. A lifting plate 103 is slidably connected to the columns 101. A first hydraulic push rod 104 is fixed to the top of the top plate 102, and the telescopic end of the first hydraulic push rod 104 is connected to the lifting plate 103. A crucible 105 is provided inside the machine base 1, and a feed pipe 106 and a pneumatic pipe 107 extending to the outside of the machine base 1 are connected to the crucible 105. Three workstations are arranged in a circular pattern between the machine base 1 and the lifting plate 103. A liquid lifting pipe 108 is provided in each workstation, and the liquid lifting pipe 108 extends downward into the crucible 105. A first mold, a second mold, and a third mold are installed sequentially in the three workstations. A first cavity 202 is provided in the first mold, a second cavity 302 is provided in the second mold, and a third cavity 402 is provided in the third mold.

[0020] The first mold includes a first lower mold body 2 fixedly installed on the top of the machine base 1, and a first upper mold body 201 fixedly installed on the bottom of the lifting plate 103. A plurality of first cavities 202 are evenly opened on the mating surface between the first lower mold body 2 and the first upper mold body 201. A first injection channel 203 connected to the liquid riser 108 is opened in the first lower mold body 2. A first flow channel 204 connecting the first cavity 202 and the first injection channel 203 is opened on the mating surface between the first lower mold body 2 and the first upper mold body 201.

[0021] The second mold includes a second lower mold body 3 fixedly installed on the top of the machine base 1, and a second upper mold body 301 fixedly installed on the bottom of the lifting plate 103. A plurality of second cavities 302 are evenly opened on the mating surface between the second lower mold body 3 and the second upper mold body 301. A second injection channel 303 connected to the liquid riser 108 is opened in the second lower mold body 3. A first clamping groove 304 and a second flow channel 305 connected between the second cavity 302 and the second injection channel 303 are opened on the mating surface between the second lower mold body 3 and the second upper mold body 301. The first clamping groove 304 and the first flow channel 204 are correspondingly arranged.

[0022] The third mold includes a third lower mold body 4 fixedly installed on the top of the machine base 1, and a third upper mold body 401 fixedly installed on the bottom of the lifting plate 103. Numerous third cavities 402 are evenly opened on the mating surface between the third lower mold body 4 and the third upper mold body 401. A third injection channel 403 connected to the liquid riser 108 is opened in the third lower mold body 4. A second clamping groove 404, a third clamping groove 405 and a third flow channel 406 connected between the third cavity 402 and the third injection channel 403 are opened on the mating surface between the third lower mold body 4 and the third upper mold body 401. The second clamping groove 404 is correspondingly arranged with the first flow channel 204, and the third clamping groove 405 is correspondingly arranged with the second flow channel 305.

[0023] The dimensions of the first cavity 202, the second cavity 302, and the third cavity 402 gradually increase. The increased space of the second cavity 302 compared to the first cavity 202, and the increased space of the third cavity 402 compared to the second cavity 302, are equal to the space inside the first cavity 202. The positions of the first clamping groove 304 and the second flow channel 305 are staggered. The positions of the second clamping groove 404, the third clamping groove 405, and the third flow channel 406 are staggered. A rotary conveying mechanism acting between the first mold, the second mold, and the third mold is provided on the top of the machine base 1.

[0024] When the device is in operation, the low-pressure casting product used by the staff is an aluminum alloy part for medical dental instruments. During the production process, the crucible 105 stores molten aluminum alloy. After the first hydraulic push rod 104 is energized and started, it can control the lifting plate 103 to move up and down, driving the first upper mold body 201, the second upper mold body 301 and the third upper mold body 401 to move up and down synchronously, thereby realizing the synchronous opening and closing operation of the first mold, the second mold and the third mold. There are three first hydraulic push rods 104 in total. The three first hydraulic push rods 104 are distributed around the top of the top plate 102. The three first hydraulic push rods 104 are respectively set directly above the first upper mold body 201, the second upper mold body 301 and the third upper mold body 401. This makes the force on the first mold, the second mold and the third mold more balanced when opening and closing the mold, and helps to ensure the tightness of the mold closing.

[0025] During mold production, molten aluminum alloy can be transported to crucible 105 through feed pipe 106, while inert gas is introduced into crucible 105 through pressure pipe 107. During the inert gas introduction process, feed pipe 106 is in a closed state. With the push generated by the gas introduction, the molten aluminum alloy in crucible 105 is transported upward through riser pipe 108. Valves are installed in each of the three riser pipes 108 to control the opening and closing of each riser pipe 108 according to processing requirements. The first injection channel 203, the second injection channel 303 and the third injection channel 403 adopt hot flow technology to ensure that the molten aluminum alloy in the first injection channel 203, the second injection channel 303 and the third injection channel 403 maintains a stable molten state.

[0026] In the initial mold-closing state, only the riser pipe 108 corresponding to the first mold is open, while the riser pipes 108 corresponding to the second and third molds are closed. In this state, the molten aluminum alloy, through the connection between the riser pipe 108 and the first injection channel 203, and guided by the first flow channel 204, fills the multiple first cavities 202 from bottom to top, completing the first low-pressure casting of the product in the first mold. After the molten aluminum alloy in the first cavity 202 and the first flow channel 204 of the first mold solidifies, a one-piece molded product is formed. Then, the device performs the mold-opening operation. In the mold-opening state... The rotary conveying mechanism is activated to transport the primary molded part from the first mold to the second mold. When the primary molded part is in the second mold, the part of the primary molded part corresponding to the first cavity 202 is in the second cavity 302, and the part of the primary molded part corresponding to the first runner 204 is precisely embedded in the first clamping groove 304. Then, the second mold closing operation is performed. When the mold is closed, the part of the primary molded part corresponding to the first runner 204 is firmly clamped by the first clamping groove 304 in the second mold, so that the part of the primary molded part corresponding to the first cavity 202 is suspended in the second cavity 302.

[0027] In the second mold-closing state, the riser pipes 108 corresponding to the first and second molds are unobstructed, while the riser pipe 108 corresponding to the third mold is closed. In this state, the molten aluminum alloy fills the first mold as before, and low-pressure casting of the primary molded product continues within the first mold. Simultaneously, under the guidance of another riser pipe 108, the second injection channel 303, and the second flow channel 305, the molten aluminum alloy fills the interiors of multiple second cavities 302 from bottom to top, wrapping around the exterior of the primary molded product within the second mold, completing the second low-pressure casting of the product within the second mold. After the molten aluminum alloy in the second cavity 302 and the second flow channel 305 within the second mold solidifies and forms, it wraps around the exterior of the primary molded product, forming a secondary molded product. Then, the device opens the mold. In operation, with the mold open, the rotary conveying mechanism is activated to transport the secondary molded part from the second mold to the third mold, and simultaneously transport the primary molded part from the first mold to the second mold. When the secondary molded part is in the third mold, the part of the secondary molded part corresponding to the second cavity 302 is in the third cavity 402, and the part of the secondary molded part corresponding to the first clamping groove 304 and the second flow channel 305 is precisely embedded in the second clamping groove 404 and the third clamping groove 405. Then, the third mold closing operation is performed. When the mold is closed, the part of the secondary molded part corresponding to the first clamping groove 304 and the second flow channel 305 is firmly clamped by the second clamping groove 404 and the third clamping groove 405 in the third mold, so that the part of the secondary molded part corresponding to the second cavity 302 is suspended in the third cavity 402.

[0028] In the third mold-closing state, the riser pipes 108 corresponding to the first, second, and third molds are all unobstructed. In this state, the molten aluminum alloy fills the first and second molds as before. Low-pressure casting of the primary molded product continues in the first mold, and low-pressure casting of the secondary molded product continues in the second mold. Simultaneously, with the docking of the last riser pipe 108 and the third injection channel 403, and guided by the third flow channel 406, the molten aluminum alloy fills the interior of multiple third cavities 402 from bottom to top, wrapping the exterior of the secondary molded product in the third mold, completing the third low-pressure casting of the product in the third mold. After the molten aluminum alloy in the third cavity 402 and the third flow channel 406 in the third mold solidifies and forms, it wraps the exterior of the secondary molded product, forming a complete product. Then, the device performs the mold-opening operation. In the mold-opening state, the rotary conveying mechanism is activated to remove the complete product from the third mold for unloading, and simultaneously transports the secondary molded product from the second mold to the third mold, and the primary molded product from the first mold to the second mold.

[0029] In subsequent operations, the three riser pipes 108 remain unobstructed, supplying material to the first, second, and third molds. Following the casting process described above, a primary molded part is generated in the first mold, then transferred to the second mold, where molten aluminum alloy is wrapped around its outer side. After solidification, a secondary molded part is generated. Finally, the secondary molded part is transferred to the third mold, where molten aluminum alloy is wrapped around its outer side again. After solidification, a complete product is generated. Through the cooperation of different molds at the three workstations and the progressive transport operation using a rotary conveying mechanism, multi-stage low-pressure casting production of aluminum alloy parts can be achieved. The low-pressure casting of a single product is completed in three stages, making each casting more compact and improving the density of the product. Combined with the progressive wrapping casting production from the inside out, the structural strength of the product after casting can be effectively improved.

[0030] By staggering the first clamping groove 304 and the second flow channel 305, and staggering the second clamping groove 404, the third clamping groove 405, and the third flow channel 406, the molten aluminum alloy in the second mold can smoothly enter the second cavity 302 through the second flow channel 305, and the molten aluminum alloy in the third mold can smoothly enter the third cavity 402 through the third flow channel 406. This ensures the smooth flow of molten aluminum alloy in the latter two low-pressure casting processes during the three-stage casting of the aluminum alloy part. Furthermore, by solidifying the molten aluminum alloy in the first flow channel 204, the second flow channel 305, and the third flow channel 406, a stable connection can be formed between the primary molded part, the secondary molded part, and the complete product during the casting process, which is beneficial to ensuring the stability of the rotary conveying mechanism during the transfer process.

[0031] In this device, the spatial increase of the third cavity 402 compared to the second cavity 302 is the same as the spatial increase of the second cavity 302 compared to the first cavity 202. The spatial increase of the second cavity 302 compared to the first cavity 202 is the same as the internal space of the first cavity 202. The lengths of the first flow channel 204, the second flow channel 305, and the third flow channel 406 are also the same. This ensures that the amount of molten aluminum alloy injected into the first mold, the second mold, and the third mold is the same each time the mold is closed for casting. This makes the mold opening and closing operation control of the first mold, the second mold, and the third mold consistent, which facilitates the synchronous transport operation of the rotary transport mechanism in the mold-open state. It can avoid mutual interference of low-pressure casting in the first mold, the second mold, and the third mold, which is conducive to ensuring the stability and efficiency of the device during operation.

[0032] In the specific implementation process, such as Figure 9As shown, a convergence port is provided in the first flow channel 204, the first clamping groove 304, the second flow channel 305, the second clamping groove 404, the third clamping groove 405, and the third flow channel 406. The convergence port in the third flow channel 406 is located at the communication position between the third flow channel 406 and the third cavity 402. The convergence ports in the first flow channel 204, the first clamping groove 304, the second flow channel 305, the second clamping groove 404, and the third clamping groove 405 are all corresponding to the convergence port in the third flow channel 406. When the device is running, the first flow channel 204, the first clamping groove 304, the second flow channel 305, the second clamping groove 404, and the third clamping groove 405 are all provided with convergence ports. The inner diameters of the clamping groove 304, the second flow channel 305, the second clamping groove 404, the third clamping groove 405, and the third flow channel 406 are the same. The inner diameter of the converging openings inside them is smaller. Each converging opening corresponds to a molded product. By aligning the converging openings with the converging openings in the third flow channel 406, after the complete product is formed in the third mold, the narrow segments formed by the molten aluminum alloy at all converging openings are located at the connection points on the outer surface of the complete product. This facilitates the cutting operation at the connection points and improves the ease of separating the products one by one.

[0033] In the specific implementation process, such as Figure 4 - Figure 6As shown, ejector plates 5 are slidably installed inside the first lower mold body 2, the first upper mold body 201, the second lower mold body 3, the second upper mold body 301, the third lower mold body 4, and the third upper mold body 401. Ejector bodies 501 are evenly distributed on the ejector plates 5. First springs 502 for elastically supporting the ejector plates 5 are installed inside the first lower mold body 2, the first upper mold body 201, the second lower mold body 3, the second upper mold body 301, the third lower mold body 4, and the third upper mold body 401. Second hydraulic push rods for pushing the ejector plates 5 inside the first lower mold body 2, the second lower mold body 3, and the third lower mold body 4 are installed inside the machine base 1. 503. A third hydraulic push rod 504 is installed on the lifting plate 103 to push the ejector plates 5 inside the first upper mold body 201, the second upper mold body 301, and the third upper mold body 401. When the device is running, under the elastic support of the first spring 502, the ejector body 501 is stably retracted inside each mold. When the mold is opened, as the lifting plate 103 drives the first upper mold body 201, the second upper mold body 301, and the third upper mold body 401 to rise, multiple third hydraulic push rods 504 will be activated simultaneously to control the ejector plates inside the first upper mold body 201, the second upper mold body 301, and the third upper mold body 401. 5. Relatively downward movement causes the ejector pin bodies 501 within the first upper mold body 201, second upper mold body 301, and third upper mold body 401 to extend downwards. The ejector pin bodies 501 within the first upper mold body 201 apply a relatively downward thrust to the primary molded part within the first cavity 202; the ejector pin bodies 501 within the second upper mold body 301 apply a relatively downward thrust to the secondary molded part within the second cavity 302; and the ejector pin bodies 501 within the third upper mold body 401 apply a relatively downward thrust to the complete product within the third cavity 402. The pushing stroke and lifting of the third hydraulic push rod 504... The lifting of plate 103, maintaining a consistent speed but opposite direction, allows the primary molded part to smoothly separate from the first upper mold body 201 while remaining connected to the first lower mold body 2 during the mold opening process. The secondary molded part can smoothly separate from the second upper mold body 301 while remaining connected to the second lower mold body 3. The complete product can smoothly separate from the third upper mold body 401 while remaining connected to the third lower mold body 4. After the mold opening is completed, the third hydraulic push rod 504 returns to its initial state. With the elastic support of the first spring 502, the ejector plate 5 drives the ejector body 501 to reset to its initial state.

[0034] During the subsequent handling of the primary molded part, secondary molded part, and complete product using the rotary conveying assembly, an upward lifting force is provided. During this process, multiple second hydraulic push rods 503 are activated simultaneously, pushing the ejector plates 5 in the first lower mold body 2, second lower mold body 3, and third lower mold body 4 to move the ejector bodies 501 upward, ejecting the primary molded part, secondary molded part, and complete product upward for demolding. During this process, the demolding force comes from the lifting of the upper rotary conveying mechanism and the pushing of the ejector bodies 501 in the lower first lower mold body 2, second lower mold body 3, and third lower mold body 4. The upper and lower parts cooperate with each other, which helps to improve the smoothness of demolding. After demolding is completed, the second hydraulic push rods 503 return to their initial state. With the elastic support of the first spring 502, the ejector plates 5 drive the ejector bodies 501 to reset to their initial state.

[0035] In this device, when the mold is opened, the primary molded object and the secondary molded object are temporarily left in the first lower mold body 2 and the second lower mold body 3. This ensures that the primary molded object and the secondary molded object remain in a stable position before the rotary conveying mechanism grasps them. This helps to ensure the positioning accuracy during grasping, and in turn, helps to ensure the precision and stability of the device when it transports the primary molded object to the second mold and the secondary molded object to the third mold.

[0036] In the specific implementation process, such as Figure 1 - Figure 2 , Figure 4 - Figure 7 and Figure 10 - Figure 11 As shown, the rotary conveying mechanism includes a column 6 fixed at the center of the top of the machine base 1, and a sleeve 601 movably sleeved on the outer side of the column 6. Three grippers 602 are fixed on the outer end wall of the sleeve 601, and numerous evenly distributed vertical tubes 603 are slidably inserted into the grippers 602. A suction cup 604 is fixedly installed at the bottom end of the vertical tube 603. A second spring 605 is fixedly connected between the top end of the vertical tube 603 and the gripper 602. A groove 606 is formed on the cylindrical surface of the column 6. Furthermore, the slide groove 606 is formed by three interconnected V-shaped grooves distributed around it. A pin 607 is fixed on the inner end wall of the sleeve 601 and slidably inserted into the slide groove 606. A shaft 608 is rotatably sleeved on the outside of the sleeve 601 at the bottom of the top plate 102. The outer dimension of the sleeve 601 is set as a prism structure. The inner dimension of the shaft 608 is adapted to the outer dimension of the sleeve 601. A servo motor 609 for driving the shaft 608 to rotate is fixed on the top of the top plate 102.

[0037] When the device is in operation, in the mold-open state, the rotary conveying mechanism realizes the operation of transporting the one-time molded product from the first mold to the second mold, the operation of transporting the two-time molded product from the second mold to the third mold, and the operation of removing the complete product from the third mold. Since the first mold, the second mold, and the third mold are arranged in a ring, the column rod 6 is installed at the center position between the three molds, and the sleeve 601 drives the three ring-distributed grippers 602 to move around the column rod 6, so that the three grippers 602 can correspond to the three molds respectively.

[0038] In normal operation, the three grippers 602 are staggered with the three molds, with each gripper 602 positioned between two adjacent molds. This ensures that the grippers 602 do not obstruct the closing of the three molds. After mold opening, the servo motor 609 is powered on and starts, driving the cylinder 608, which is fixedly connected to its drive shaft, to rotate. Since the internal dimensions of the lower end of the cylinder 608 are compatible with the external dimensions of the sleeve 601, and the external shape of the sleeve 601 is prismatic, the cylinder 608 can drive the sleeve 601 to rotate. The sleeve 601 then drives the three grippers 602 to rotate synchronously. The three grippers 602 are positioned between the first lower mold body 2 and the first upper mold body 201, and between the second lower mold body 3 and the second upper mold body 301, respectively. The sleeve 601 passes between the first lower mold body 2, the second lower mold body 3, and the third upper mold body 401. The groove 606 on the cylindrical surface of the column rod 6 is composed of three V-shaped grooves arranged in a ring. The lowest point of each V-shaped groove corresponds precisely to the middle position of the three molds. Guided by the pin 607 slidably inserted into the groove 606, when the sleeve 601 is driven to rotate the gripper 602 towards the middle position of the mold, the pin 607 slides downward along the V-shaped groove structure within the groove 606. When the gripper 602 reaches the middle position of the mold, the pin 607 is precisely at the lowest position of the V-shaped groove structure within the groove 606, causing the gripper 602 to be driven downwards and descend between the first lower mold body 2, the second lower mold body 3, and the third lower mold body 4. With their positions closer together, the vertical tube 603 is elastically slidably connected to the gripper 602 via the second spring 605. This allows the suction cup 604 installed below the first gripper 602 to stably press against the primary molded product in the first cavity 202 of the first lower mold body 2. The suction cup 604 installed below the second gripper 602 can stably press against the secondary molded product in the second cavity 302 of the second lower mold body 3. The suction cup 604 installed below the third gripper 602 can stably press against the complete product in the third cavity 402 of the third lower mold body 4. The gripping operation is completed by the negative pressure suction formed by the airflow in the suction cup 604. As the rotation continues, the gripper 602 gradually moves from the corresponding mold center position. The material is moved away from the mold and transferred to the next mold. During this process, the sleeve 601 drives the pin 607 to continue sliding in the V-groove in the slide 606, driving the gripper 602 to move the corresponding primary molded material, secondary molded material, or complete product upward. The primary molded material is transported to the second mold, the secondary molded material is transported to the third mold, and the complete product is removed for unloading. After the primary molded material is transported into the second mold, and the secondary molded material is transported into the third mold, the airflow in the suction cup 604 is interrupted, so that the primary and secondary molded materials are stably and accurately placed downward. Through the continuous rotation of the three grippers 602 driven by the sleeve 601, efficient and flexible handling operations can be achieved, which is conducive to ensuring production efficiency.

[0039] In this device, the bottom of the V-shaped groove structure in the slide 606 converges towards the middle position. This makes the gripper 602 move in a straight up-down direction when it is near or away from the middle of the mold. This effectively ensures the smoothness and stability of the suction cup 604 when it grabs and transports primary molded products, secondary molded products, or complete products. In actual production, the guide of the slide 606 and the pin 607 can be replaced with an electric push rod according to the production precision requirements. The electric push rod controls the gripper 602 to rotate into position and move straight up and down, which can more accurately realize the picking and placing of molded products.

[0040] In the specific implementation process, such as Figure 1 - Figure 7 and Figure 10 As shown, a first air pipe 7 is provided at the top of the top plate 102, a vacuum generator 701 is fixed on the gripper 602, and the negative pressure suction port of the vacuum generator 701 is connected to the top of the vertical pipe 603. A first annular pipe 702 surrounding the shaft cylinder 608 is fixed at the bottom of the top plate 102, and the first annular pipe 702 is connected to the first air pipe 7. The bottom of the first annular pipe 702 is rotatably connected to a second annular pipe 703 fixedly connected to the shaft cylinder 608, and a second air pipe 704 is connected between the second annular pipe 703 and the air inlet of the vacuum generator 701. A magnetic control valve 70 installed in the second air pipe 704 is fixed on the gripper 602. 5. When the device is in operation, the first air pipe 7 is connected to an external air pump, which provides a high-speed airflow. The airflow in the first air pipe 7 enters the second air pipe 704 through the connection between the first ring pipe 702 and the second ring pipe 703. After passing through the vacuum generator 701, it applies a suction force to the suction cup 604 located below the gripper 602, so that the suction cup 604 can perform a gripping operation when pressed onto a primary molded object, a secondary molded object, or a complete product. When it is necessary to release the primary molded object, a secondary molded object, or a complete product, it is only necessary to interrupt the airflow supply of the air pump to achieve the gripping and separation operation. The operation is convenient and efficient.

[0041] In this device, the airflow between the first air pipe 7 and the second air pipe 704 is achieved by rotating the first ring pipe 702 and the second ring pipe 703. This allows the sleeve 601 to drive the three grippers 602 to rotate continuously for transport without interfering with the airflow delivery, which helps to ensure the stability of the device during operation.

[0042] In the specific implementation process, such as Figure 1 , Figure 5 , Figure 10 and Figure 12As shown, the top of the machine base 1 is provided with a feeding area 8 located between the third mold and the first mold, and a conveyor belt 801 extending to the outside of the machine base 1 is fixed on the feeding area 8. The magnetic valve 705 includes a valve body 7051 fixedly connected in the second air pipe 704, and a vertically arranged valve plate 7052 is inserted in the valve body 7051. A third spring 7053 for elastically supporting the valve plate 7052 is fixed on the valve body 7051. A magnet 706 located below the magnetic valve 705 is fixed in the feeding area 8. The valve plate 7052 is made of magnetically conductive material. When the device is running, the complete product cast in the third mold is transferred out by the rotating conveying mechanism. Under normal conditions, under the elastic support of the third spring 7053, the valve plate 7052 is kept in the upper position inside the valve body 7051, so that the inside of the second air pipe 704 is in a connected state. The airflow can be stably delivered to the vacuum generator 701 through the second air pipe 704. When the complete product is transported to the third mold and the first mold, the valve plate 7052 is connected to the second mold. When the unloading area 8 is set in the middle of the mold, the magnetic control valve 705 is directly above the magnet 706. The valve plate 7052 can be made of iron. Through the magnetic attraction of the magnet 706, the valve plate 7052 overcomes the elastic support of the third spring 7053 and moves downward. The valve plate 7052 is vertically inserted into the lower part of the valve body 7051, cutting off the connection of the second air pipe 704, so that the airflow cannot be delivered to the vacuum generator 701. Without the airflow effect, the suction cup 604 releases its grip on the complete product. Under the action of gravity, the complete product falls onto the conveyor belt 801 and is transported outward by the conveyor belt 801. Through the cooperation of the magnetic control valve 705 and the magnet 706, the rotary conveying mechanism can automatically move the complete product down after it is transported above the unloading area 8. With the continuous conveying of the conveyor belt 801, the stability of continuous unloading of complete products can be effectively guaranteed, which is conducive to the automatic realization of continuous unloading operation and thus improves production efficiency.

[0043] Specifically, the working principle of this invention is as follows: The device stores molten aluminum alloy in a crucible 105. A lifting plate 103 is raised and lowered via a first hydraulic pusher 104, enabling simultaneous opening and closing of the first, second, and third molds. In the closed state, inert gas is continuously injected into the crucible 105 through a pressure pipe 107, pushing the molten aluminum alloy in the crucible 105 upwards along the riser pipe 108. During the first mold-closing production, the molten aluminum alloy enters the first mold, where a primary molded object is cast in the first cavity 202. Then, in the open state, a rotating conveying mechanism transports the primary molded object to the second mold. After mold closure, a second casting production is performed, with molten aluminum alloy simultaneously entering both the first and second molds. A primary molded object is cast in the first mold, and a secondary molded object is formed in the second mold, encasing the previous primary molded object. Finally, in the open state... In this state, the primary molded part is continuously transported to the second mold via a rotary conveying mechanism, and the secondary molded part is transported to the third mold. After the molds are closed, the third casting process is carried out. Molten aluminum alloy simultaneously enters the first, second, and third molds. The primary molded part is cast in the first mold, the secondary molded part is formed in the second mold, and the complete product is formed in the third mold, which is wrapped around the previous secondary molded part. After the molds are opened, the rotary conveying mechanism continues to perform progressive transport operations. The complete product is then removed and unloaded. In subsequent production processes, the first, second, and third molds maintain synchronous injection of molten aluminum alloy, sequentially forming the primary molded part, the secondary molded part, and the complete product. The rotary conveying mechanism performs progressive transport, realizing continuous production of multi-layer casting of aluminum alloy parts.

[0044] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rotary multi-station low-pressure casting equipment for aluminum alloy parts, comprising a machine base (1), characterized in that: The machine base (1) has four fixed columns (101) at the top corners, and a top plate (102) is fixed to the top of each column (101). A lifting plate (103) is slidably connected to the column (101). A first hydraulic push rod (104) is fixed to the top of the top plate (102), and the telescopic end of the first hydraulic push rod (104) is connected to the lifting plate (103). A crucible (105) is provided inside the machine base (1), and a feed pipe (106) and a pneumatic pipe (107) extending to the outside of the machine base (1) are connected to the crucible (105). Three surrounding workstations are provided between the machine base (1) and the lifting plate (103). Each workstation is provided with a liquid riser (108), and the liquid riser (108) extends downward. Inside the crucible (105), a first mold, a second mold, and a third mold are installed sequentially in the three workstations. The first mold has a first cavity (202), the second mold has a second cavity (302), and the third mold has a third cavity (402). The dimensions of the first cavity (202), the second cavity (302), and the third cavity (402) gradually increase. The space increase of the second cavity (302) compared to the first cavity (202) and the space increase of the third cavity (402) compared to the second cavity (302) are equal to the space inside the first cavity (202). The top of the machine base (1) is provided with a rotating transport mechanism that acts between the first mold, the second mold, and the third mold.

2. The rotary multi-station low-pressure casting equipment for aluminum alloy parts according to claim 1, characterized in that: The first mold includes a first lower mold body (2) fixedly installed on the top of the machine base (1) and a first upper mold body (201) fixedly installed on the bottom of the lifting plate (103). A plurality of first cavities (202) are evenly opened on the mating surface between the first lower mold body (2) and the first upper mold body (201). A first injection channel (203) connected to the liquid riser (108) is opened in the first lower mold body (2). A first flow channel (204) connecting the first cavity (202) and the first injection channel (203) is opened on the mating surface between the first lower mold body (2) and the first upper mold body (201). The second mold includes a second lower mold body (3) fixedly installed on the top of the machine base (1) and a second upper mold body (301) fixedly installed on the bottom of the lifting plate (103). A plurality of second cavities (302) are evenly opened on the mating surface between the second lower mold body (3) and the second upper mold body (301). The second lower mold body (3) is provided with a second injection channel (303) that is connected to the liquid riser (108). The mating surface between the second lower mold body (3) and the second upper mold body (301) is provided with a first clamping groove (304) and a second flow channel (305) that are connected between the second cavity (302) and the second injection channel (303). The first clamping groove (304) and the first flow channel (204) are correspondingly arranged. The third mold includes a third lower mold body (4) fixedly installed on the top of the machine base (1) and a third upper mold body (401) fixedly installed on the bottom of the lifting plate (103). A number of third cavities (402) are evenly opened on the mating surface between the third lower mold body (4) and the third upper mold body (401). The third lower mold body (4) is provided with a third injection channel (403) that is connected to the liquid riser (108). The mating surface between the third lower mold body (4) and the third upper mold body (401) is provided with a second clamping groove (404), a third clamping groove (405) and a third flow channel (406) that are connected between the third cavity (402) and the third injection channel (403). The second clamping groove (404) is correspondingly arranged with the first flow channel (204), and the third clamping groove (405) is correspondingly arranged with the second flow channel (305).

3. The rotary multi-station low-pressure casting equipment for aluminum alloy parts according to claim 2, characterized in that: The positions of the first clamping groove (304) and the second flow channel (305) are staggered, and the positions of the second clamping groove (404), the third clamping groove (405) and the third flow channel (406) are staggered.

4. The rotary multi-station low-pressure casting equipment for aluminum alloy parts according to claim 2, characterized in that: The first flow channel (204), the first clamping groove (304), the second flow channel (305), the second clamping groove (404), the third clamping groove (405), and the third flow channel (406) are all provided with a convergence port. The convergence port in the third flow channel (406) is located at the communication position between the third flow channel (406) and the third cavity (402). The convergence ports in the first flow channel (204), the first clamping groove (304), the second flow channel (305), the second clamping groove (404), and the third clamping groove (405) are all provided with a convergence port corresponding to the convergence port in the third flow channel (406).

5. A rotary multi-station low-pressure casting equipment for aluminum alloy parts according to claim 2, characterized in that: Ejector plates (5) are slidably installed inside the first lower mold body (2), the first upper mold body (201), the second lower mold body (3), the second upper mold body (301), the third lower mold body (4), and the third upper mold body (401). Ejector bodies (501) are evenly distributed on the ejector plates (5). Each of the components is equipped with a first spring (502) for elastic support of the ejector plate (5). The machine base (1) is equipped with a second hydraulic push rod (503) for pushing the ejector plates (5) in the first lower mold body (2), the second lower mold body (3) and the third lower mold body (4). The lifting plate (103) is equipped with a third hydraulic push rod (504) for pushing the ejector plates (5) in the first upper mold body (201), the second upper mold body (301) and the third upper mold body (401).

6. The low-pressure casting equipment for rotary multi-station aluminum alloy parts according to claim 1, characterized in that: The rotary conveying mechanism includes a column (6) fixed at the middle position of the top of the machine base (1), and a sleeve (601) is movably sleeved on the outer side of the column (6). Three grippers (602) are fixed on the outer end wall of the sleeve (601) and distributed around it. Numerous evenly distributed vertical tubes (603) are slidably inserted on the grippers (602). A suction cup (604) is fixedly installed at the bottom end of the vertical tube (603). A second spring (605) is fixedly connected between the top end of the vertical tube (603) and the gripper (602).

7. A rotary multi-station low-pressure casting equipment for aluminum alloy parts according to claim 6, characterized in that: The cylindrical surface of the column rod (6) is provided with a sliding groove (606), and the sliding groove (606) is formed by three V-shaped grooves distributed around it and connected to each other. A pin (607) is fixed on the inner end wall of the sleeve (601) and slidably inserted into the sliding groove (606).

8. A rotary multi-station low-pressure casting equipment for aluminum alloy parts according to claim 7, characterized in that: The bottom of the top plate (102) has a rotatable cylinder (608) that is movably sleeved on the outside of the sleeve (601). The outer dimensions of the sleeve (601) are set as a prism structure. The inner dimensions of the cylinder (608) are adapted to the outer dimensions of the sleeve (601). The top of the top plate (102) is fixed with a servo motor (609) for driving the cylinder (608) to rotate.

9. A rotary multi-station low-pressure casting equipment for aluminum alloy parts according to claim 8, characterized in that: The top of the top plate (102) is provided with a first air pipe (7), and a vacuum generator (701) is fixed on the gripper (602). The negative pressure suction port of the vacuum generator (701) is connected to the top of the vertical pipe (603). The bottom of the top plate (102) is fixed with a first ring pipe (702) arranged around the shaft cylinder (608). The first ring pipe (702) is connected to the first air pipe (7). The bottom of the first ring pipe (702) is rotatably connected to a second ring pipe (703) fixedly connected to the shaft cylinder (608). A second air pipe (704) is connected between the second ring pipe (703) and the air inlet of the vacuum generator (701). A magnetic control valve (705) installed in the second air pipe (704) is fixed on the gripper (602).

10. A rotary multi-station low-pressure casting equipment for aluminum alloy parts according to claim 9, characterized in that: The top of the machine base (1) is provided with a feeding area (8) located between the third mold and the first mold, and a conveyor belt (801) extending to the outside of the machine base (1) is fixed on the feeding area (8). The magnetic valve (705) includes a valve body (7051) fixedly connected in the second air pipe (704), and a vertically arranged valve plate (7052) is inserted in the valve body (7051). A third spring (7053) for elastic support of the valve plate (7052) is fixed on the valve body (7051). A magnet (706) located below the magnetic valve (705) is fixed in the feeding area (8). The valve plate (7052) is made of magnetically conductive material.

Images