High-purity biomedical material melting and casting equipment and process

Abstract

This invention provides a high-purity biomedical material melting and casting equipment and process, relating to the field of melting and casting device technology. It includes a furnace body, a cooling device, a mold device, and a lifting device. The furnace body includes an outer crucible and an inner crucible, with a filtration mechanism inside the inner crucible and a discharge port below the filtration mechanism. The cooling device includes a cooling jacket and a cooling plate located below the cooling jacket. The mold device includes a forming mold, which is mounted on the cooling plate and its top passes through the cooling jacket. The lifting device is connected to the cooling plate. This invention melts, casts, and shapes magnesium ingots under inert gas protection, effectively preventing oxidation. The filtration mechanism effectively removes metallic impurities and oxide inclusions, resulting in a clean and dense high-purity magnesium rod. The cooling method using a cooling jacket and cooling plate effectively reduces the ingot grain size, homogenizes the microstructure, reduces segregation, improves mechanical properties, and ensures product quality. Multiple molds can also be cast simultaneously, resulting in high production efficiency.

Description

Technical Field

[0001] This invention relates to the field of casting equipment technology, specifically to a casting equipment and process for high-purity biomedical materials. Background Technology

[0002] Medical-grade high-purity magnesium is a high-purity magnesium material with high biocompatibility and biodegradability. It is widely used in the medical field, including orthopedics, cardiovascular, neurology, and dentistry.

[0003] Melting furnaces are widely used as devices for producing high-purity magnesium rods. One existing high-purity magnesium melting furnace includes a top cover, furnace body, crucible, valve control mechanism, mold box, mold lifting mechanism, vacuum system, and inert gas protection system. The mold box contains a mold, and a cooling plate is located below the mold. During production, the molten magnesium is cooled by the cooling plate to form high-purity magnesium rods. However, cooling solely by the cooling plate has limitations. Because the high-purity magnesium rods are relatively tall, the upper and middle sections have high temperatures, preventing rapid solidification. This results in poor cooling, low melting efficiency, and coarse grains in the produced high-purity magnesium rods, leading to quality degradation during subsequent extrusion. Summary of the Invention

[0004] The purpose of this invention is to provide a high-purity biomedical material casting equipment to solve the technical problems of low efficiency and poor quality in the production of high-purity magnesium rods in existing casting furnaces. The preferred technical solutions provided by this invention can produce many technical effects, which are described in detail below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a high-purity biomedical material casting equipment, comprising a furnace body, a cooling device, a mold device, and a lifting device. The furnace body includes an outer crucible and an inner crucible disposed inside the outer crucible. A filtration mechanism is installed inside the inner crucible, and a discharge port is located below the filtration mechanism. The cooling device includes a cooling jacket and a cooling plate. The cooling jacket is connected to the bottom side of the outer crucible, and the cooling plate is located below the cooling jacket. The mold device includes a forming mold disposed on the cooling plate, with its top end passing through the cooling jacket and positioned below the discharge port. The lifting device is connected to the cooling plate and can drive the cooling plate to move up and down.

[0007] Preferably, the furnace body device includes a split furnace body, which includes a left furnace body, a right furnace body, and a moving drive mechanism, wherein: the left furnace body and the right furnace body are movably clamped on both sides of the outer crucible; the moving drive mechanism is connected to the left furnace body and / or the right furnace body and can drive the left furnace body and / or the right furnace body to move.

[0008] Preferably, the outer crucible includes an outer crucible cover, an outer crucible body, and a sealing ring, wherein: the outer crucible cover is openable and closable and is disposed on the top of the outer crucible body; the outer crucible cover is provided with a vacuum interface; the outer crucible cover is provided with a safety valve, a first exhaust valve, and a rupture disc device; the outer crucible body is disposed between the left furnace body and the right furnace body; the outer wall of the outer crucible body, the inner wall of the left furnace body, and the inner wall of the right furnace body form a first heating chamber and a second heating chamber distributed sequentially from top to bottom; the sealing ring is disposed between the outer crucible cover and the outer crucible body; the outer crucible cover is provided with an upper annular cooling channel corresponding to the position of the sealing ring; the outer crucible body is provided with a lower annular cooling channel corresponding to the position of the sealing ring; the upper annular cooling channel and the lower annular cooling channel are used for cooling the sealing ring.

[0009] Preferably, the inner crucible includes an inner crucible cover and an inner crucible body, wherein: the inner crucible cover is openable and closable at the top of the inner crucible body; the inner crucible body is provided with a first accommodating cavity and a second accommodating cavity from top to bottom, the filtering mechanism is disposed between the first accommodating cavity and the second accommodating cavity, the first accommodating cavity is used to hold magnesium ingots to be melted and cast, the second accommodating cavity is used to hold filtered high-purity magnesium liquid, the discharge port is connected to the bottom of the second accommodating cavity, and a conical valve mechanism is provided at the position of the discharge port, the conical valve mechanism being linked with the lifting device.

[0010] Preferably, the furnace body device includes a flow divider, which is disposed on the bottom side of the discharge port and located above the forming mold; the flow divider includes a flow divider body, and a conical guide column is disposed within the flow divider body. The conical guide column is coaxially disposed with the discharge port. Multiple flow dividers are uniformly disposed circumferentially within the flow divider body relative to the conical guide column. The number of forming molds is the same as the number of flow dividers, and each flow divider is connected to the corresponding forming mold.

[0011] Preferably, the cooling jacket is provided with a first cooling cavity and a guide cavity, wherein: the first cooling cavity is connected to a first liquid inlet pipe and a first liquid outlet pipe, the first liquid inlet pipe is located below the first liquid outlet pipe; the guide cavity is provided through the cooling jacket along the axial direction, the molding die passes through the guide cavity and slides with the guide cavity.

[0012] Preferably, the cooling plate has a second cooling chamber inside, and a second liquid inlet pipe and a second liquid outlet pipe are provided on the cooling plate in communication with the second cooling chamber. The inner top wall of the second cooling chamber is connected to a heat exchange toothed plate, which is annular and multiple in number, arranged at intervals from the inside to the outside. The inlet end of the second liquid outlet pipe is located inside the second cooling chamber, near the inner top wall, and the outlet end is located on the inner bottom wall of the second cooling chamber. The bottom end of the outermost heat exchange toothed plate has an outward chamfer, and the inlet end of the second liquid outlet pipe is located on the outer side of the outermost heat exchange toothed plate.

[0013] Preferably, the mold device includes a mold box, which is connected to the bottom side of the cooling jacket, and the cooling plate can be raised and lowered inside the mold box; the mold box is provided with a door for taking out and putting in the molding mold; the mold box is connected to a second exhaust valve, a pressure gauge and a vacuum valve.

[0014] Preferably, the lifting device includes a lifting pipe, a lifting drive mechanism, and a guide mechanism, wherein: the top end of the lifting pipe is connected to the cooling plate, the bottom end of the lifting pipe passes through the mold box, and the lifting pipe is connected to the mold box through a dynamic sealing mechanism; the lifting drive mechanism is connected to the lifting pipe and can drive the lifting pipe to rise and fall; the guide mechanism includes a vertically arranged guide member and a movable member movably arranged on the guide member, and the lifting pipe is connected to the movable member and rises and falls synchronously.

[0015] This invention provides a high-purity biomedical material casting process, comprising at least the following steps:

[0016] Step (I): Place the magnesium ingot to be melted and cast in the inner crucible and seal the outer crucible;

[0017] Step (II) involves evacuating the furnace body and introducing an inert protective gas.

[0018] Step (III): The magnesium ingot to be cast is melted in the inner crucible to form a magnesium liquid to be filtered.

[0019] Step (IV): After the magnesium liquid to be filtered is filtered by the filtration mechanism to remove oxide inclusions and metal impurities, a high-purity magnesium liquid is formed.

[0020] Step (V): High-purity magnesium liquid is injected into the molding die through the conical valve mechanism of the discharge port. The cooling jacket and cooling plate cool the high-purity magnesium liquid from the circumferential direction and the bottom surface of the molding die, respectively, so that the high-purity magnesium liquid is formed into high-purity magnesium rods.

[0021] Step (VI): When the high-purity magnesium casting rod reaches the molding quantity, the lifting device is activated, which drives the cooling plate and the molding mold to move downward. After moving into place, the high-purity magnesium casting rod is taken out from the molding mold, and the melting and casting is completed.

[0022] The high-purity biomedical material casting equipment and process provided by this invention have at least the following beneficial effects:

[0023] The high-purity biomedical material casting equipment includes a furnace body, a cooling device, a mold device, and a lifting device. The furnace body includes an outer crucible and an inner crucible located inside the outer crucible. A filtration mechanism is installed inside the inner crucible, and a discharge port is located below the filtration mechanism. The outer and inner crucibles work together to cast magnesium ingots under an inert protective gas, which can effectively prevent oxidation during the casting process. The filtration mechanism can effectively filter the molten magnesium liquid, removing metal impurities and oxide inclusions, thereby forming a high-purity magnesium liquid.

[0024] The cooling device includes a cooling jacket and a cooling plate. The cooling jacket is connected to the bottom side of the outer crucible, and the cooling plate is located below the cooling jacket. The mold device includes a forming mold, which is located on the cooling plate. The top of the forming mold passes through the cooling jacket and is positioned below the discharge port. During the forming process, the cooling jacket and the cooling plate cool the high-purity magnesium liquid along the circumference and bottom of the forming mold, respectively, thereby forming a dense high-purity magnesium ingot. The combined cooling method of the cooling jacket and the cooling plate can effectively reduce the grain size of the ingot, homogenize the microstructure, reduce segregation, improve mechanical properties, and ensure the quality of the high-purity magnesium ingot.

[0025] The lifting device is connected to the cooling plate and can drive the cooling plate to rise and fall. When discharging, the lifting device drives the cooling plate to fall, thereby realizing the subsequent discharge of high-purity magnesium ingots.

[0026] This invention involves melting, casting, and shaping magnesium ingots under inert gas protection, effectively preventing oxidation. A filtration mechanism effectively removes metallic impurities and oxide inclusions, resulting in a clean and dense high-purity magnesium rod. The combined cooling method using a cooling jacket and cooling plate effectively reduces the ingot grain size, homogenizes the microstructure, reduces segregation, improves mechanical properties, and ensures the quality of the high-purity magnesium rod. Furthermore, multiple molds can be cast simultaneously, significantly improving production efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the support device and furnace body device of the present invention;

[0030] Figure 3 This is a cross-sectional schematic diagram of the furnace body device of the present invention;

[0031] Figure 4 This is a top view of the furnace body device of the present invention;

[0032] Figure 5 This is a cross-sectional schematic diagram of the outer crucible and the inner crucible of the present invention;

[0033] Figure 6 This is a top view schematic diagram of the outer crucible of the present invention;

[0034] Figure 7 This is an enlarged view of part A of the present invention;

[0035] Figure 8 This is an enlarged view of part B of the present invention;

[0036] Figure 9 This is a cross-sectional schematic diagram of the shunt of the present invention;

[0037] Figure 10 This is a cross-sectional schematic diagram of the support frame of the present invention;

[0038] Figure 11 This is a top view of the distributor of the present invention placed on the lower support ring;

[0039] Figure 12 This is a schematic diagram of the cooling device, mold device, and lifting device of the present invention;

[0040] Figure 13 This is a top view schematic diagram of the installation of the positioning plate, cooling plate and mold of the present invention;

[0041] Figure 14 This is a cross-sectional schematic diagram of the cooling sleeve of the present invention;

[0042] Figure 15 This is an enlarged view of part C of the present invention;

[0043] Figure 16 This is an enlarged view of part D of the present invention;

[0044] Figure 17 This is a schematic diagram of the mold box structure of the present invention;

[0045] Figure 18 This is a schematic diagram of the lifting drive mechanism of the present invention.

[0046] Figure Labels

[0047] 1. Support device; 11. Frame; 12. Support platform; 13. Track; 14. Suspension; 15. Fence; 16. Stairs; 17. Bracket; 2. Furnace body assembly; 21. Outer crucible; 211. Outer crucible cover; 2111. Upper annular cooling channel; 2112. Coolant inlet; 212. Outer crucible body; 2121. Reinforcing rib ring; 2122. Lower annular cooling channel; 213. Sealing ring; 214. Vacuum inlet; 215. Safety valve; 216. First exhaust valve; 217. Rupture disc device; 22. Inner crucible; 221. Inner crucible cover; 22 2. Inner crucible body; 223. First receiving cavity; 224. Second receiving cavity; 2241. Discharge port; 225. Conical valve mechanism; 23. Split furnace body; 231. Left furnace body; 232. Right furnace body; 233. Moving drive mechanism; 234. First heating chamber; 235. Second heating chamber; 24. Filtering mechanism; 25. Diverter; 251. Diverter body; 252. Conical guide column; 253. Diverter port; 254. Limiting groove; 26. Support frame; 261. Upper support ring; 262. Lower support ring; 263. Support rod; 3. Cooling device 31. Cooling jacket; 311. Guide cavity; 312. First cooling cavity; 313. First liquid inlet pipe; 314. First liquid outlet pipe; 315. Support base; 32. Cooling plate; 321. Limiting post; 322. Upper plate body; 3221. Heat exchange toothed plate; 3222. Chamfer; 323. Lower plate body; 324. Second cooling cavity; 325. Second liquid inlet pipe; 3251. Liquid inlet connector; 326. Second liquid outlet pipe; 3261. Liquid outlet connector; 33. Positioning plate; 331. Positioning through groove; 332. Arc-shaped limiting groove; 333. Mounting shaft; 4. Mold assembly 41. Molding mold; 42. Mold box; 421. Box door; 4211. Hinge; 422. Second exhaust valve; 423. Pressure gauge; 424. Vacuum valve; 425. Reinforcing strip; 5. Lifting device; 51. Lifting pipe; 52. Lifting drive mechanism; 521. Power mechanism; 522. Transmission mechanism; 523. Lifting screw; 524. Lifting seat; 53. Guide mechanism; 531. Guide rail assembly; 5311. Guide rail; 532. Guide rod assembly; 5321. Lifting rod body; 5322. Fixing rod sleeve; 54. Dynamic sealing mechanism; 6. Magnesium ingot. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0049] Example 1:

[0050] This invention provides a high-purity biomedical material casting equipment, referenced Figures 1-17 As shown, the high-purity biomedical material casting equipment includes a furnace body 2, a cooling device 3, a mold device 4, and a lifting device 5.

[0051] The furnace body device 2 includes an outer crucible 21 and an inner crucible 22 disposed inside the outer crucible 21. A filter mechanism 24 is disposed inside the inner crucible 22, and a discharge port 2241 is disposed below the filter mechanism 24.

[0052] The cooling device 3 includes a cooling sleeve 31 and a cooling plate 32. The cooling sleeve 31 is connected to the bottom side of the outer crucible 21, and the cooling plate 32 is located on the lower side of the cooling sleeve 31.

[0053] The mold device 4 includes a forming mold 41, which is disposed on the cooling plate 32. The top of the forming mold 41 is open and movable through the cooling sleeve 31 and positioned below the discharge port 2241.

[0054] The lifting device 5 is connected to the cooling plate 32 and can drive the cooling plate 32 to rise and fall.

[0055] When producing high-purity magnesium, the magnesium ingot 6 to be melted and cast is placed in the inner crucible 22 and the outer crucible 21 is sealed. Then, the furnace body device 2 is evacuated and an inert protective gas is introduced. The magnesium ingot 6 to be melted and cast is melted in the inner crucible 22 to form magnesium liquid to be filtered. After the magnesium liquid to be filtered flows through the filtration mechanism 24, it forms high-purity magnesium liquid and enters the forming mold 41 through the discharge port 2241. At this time, the cooling jacket 31 and the cooling plate 32 cool the high-purity magnesium liquid along the circumference and bottom surface of the forming mold 41, thereby forming a high-purity magnesium rod.

[0056] In the above process, the magnesium ingot 6 to be melted, cast and shaped under the protection of inert gas, which can effectively prevent oxidation.

[0057] During filtration, the filter mechanism 24 can effectively remove metal impurities and oxide inclusions, thereby obtaining high-purity magnesium liquid.

[0058] During cooling, the cooling jacket 31 and the cooling plate 32 work together to wrap around the periphery and bottom of the forming mold 41. This not only enables rapid cooling of the high-purity magnesium liquid, but also allows for controllable grain size, resulting in high-purity magnesium casting rods with dense structure and superior quality.

[0059] During material handling, the lifting device 5 facilitates the discharge of high-purity magnesium casting rods through lifting action, enabling repetitive and continuous production with high efficiency.

[0060] Example 2:

[0061] Example 2 is based on Example 1:

[0062] like Figure 1 and Figure 2 As shown, the high-purity biomedical material casting equipment includes a support device 1, a furnace body device 2, a cooling device 3, a mold device 4, and a lifting device 5, all of which are mounted on the support device 1.

[0063] The support device 1 is configured as a hierarchical structure, which includes a frame 11 and a support platform 12 disposed on the upper side of the frame 11. The support platform 12 is provided with a fence 15 along its edge, and a staircase 16 is provided on one side of the frame 11 for accessing the support platform 12.

[0064] like Figure 3 and Figure 4 As shown, the support platform 12 is equipped with a track 13, and the furnace body device 2 includes a split furnace body 23, which includes a left furnace body 231, a right furnace body 232 and a moving drive mechanism 233.

[0065] The left furnace body 231 and the right furnace body 232 are sandwiched on both sides of the outer crucible 21. The bottom of the left furnace body 231 is provided with a first movable seat adapted to the track 13, and the bottom of the right furnace body 232 is provided with a second movable seat adapted to the track 13. The left furnace body 231 and the right furnace body 232 are movably mounted on the track 13 through the first movable seat and the second movable seat, respectively.

[0066] Track 13 can effectively limit the movement trajectory of the left furnace body 231 and the right furnace body 232, ensuring the effect of furnace separation and combination.

[0067] Optionally, both the first movable seat and the second movable seat are configured as slide seats, with a sliding groove at their bottom end that slides in cooperation with the track 13.

[0068] Alternatively, both the bottom of the first movable seat and the second movable seat are provided with rollers, which are in rolling engagement with the track 13.

[0069] The mobile drive mechanism 233 can be a telescopic device, such as a hydraulic rod, a pneumatic rod, or an electric telescopic rod, or a linear module with a lead screw and nut mechanism.

[0070] Optionally, the moving end of the moving drive mechanism 233 is connected to the left furnace body 231 or the right furnace body 232, and can drive the left furnace body 231 or the right furnace body 232 to move along the track 13.

[0071] Alternatively, the number of moving drive mechanisms 233 is set to two, and the moving ends of the two moving drive mechanisms 233 are respectively connected to the left furnace body 231 and the right furnace body 232. The two moving drive mechanisms 233 drive the left furnace body 231 and the right furnace body 232 to move synchronously towards or away from each other.

[0072] The split furnace body 23, which has a left furnace body 231 and a right furnace body 232, serves as a clamping structure to firmly fix the crucible in a clamping manner, thereby ensuring the melting and casting effect. On the other hand, the split structure facilitates disassembly and assembly as well as subsequent maintenance.

[0073] As an optional implementation method, such as Figures 5-7 As shown, the outer crucible 21 is a metal crucible, which includes an outer crucible cover 211, an outer crucible body 212, and a sealing ring 213.

[0074] The outer crucible body 212 is disposed between the left furnace body 231 and the right furnace body 232. The outer wall of the outer crucible 21, the inner wall of the left furnace body 231 and the inner wall of the right furnace body 232 form a first heating chamber 234 and a second heating chamber 235 distributed from top to bottom. The first heating chamber 234 and the second heating chamber 235 are respectively provided with a first heating device and a second heating device, thereby forming an upper temperature zone and a lower temperature zone to achieve a gradient change in temperature.

[0075] The outer crucible body 212 has an opening at its top, and a flange is provided at the position of the opening. The outer crucible cover 211 is connected to the flange of the outer crucible body 212, so that it can be opened and closed onto the opening. An annular groove is provided on the top surface of the flange, and a sealing ring 213 is disposed in the annular groove. The outer crucible cover 211 is provided with an upper annular cooling channel 2111 corresponding to the position of the sealing ring 213. A coolant inlet 2112 is provided connected to the upper annular cooling channel 2111. The flange is provided with a lower annular cooling channel 2122 corresponding to the position of the sealing ring 213. A coolant inlet is provided to the lower annular cooling channel 2122. The upper annular cooling channel 2111 and the lower annular cooling channel 2122 correspond to each other and are located on the upper and lower sides of the sealing ring 213, respectively, which can effectively cool it and ensure its sealing effect.

[0076] like Figure 5 As shown, a reinforcing rib ring 2121 is provided on the outer crucible body 212. The reinforcing rib ring 2121 can effectively improve the structural strength of the outer crucible body 212 and prevent it from deforming due to pressure changes and temperature changes.

[0077] The reinforcing rib ring 2121 includes an outer reinforcing rib ring disposed on the outer wall of the outer crucible body 212 and an inner reinforcing rib ring disposed on the inner wall of the outer crucible body 212.

[0078] like Figure 6 As shown, a vacuum interface 214 is provided on the outer crucible cover 211. The vacuum interface 214 can not only be used for vacuuming, but also can measure the vacuum level inside the furnace by installing a vacuum gauge tube.

[0079] The outer crucible cover 211 is equipped with a first exhaust valve 216 for venting air before opening the cover.

[0080] A safety valve 215 is installed on the outer crucible cover 211 to prevent excessive pressure inside the furnace. Furthermore, a rupture disc device 217 is also installed on the outer crucible cover 211 to achieve rapid pressure relief and ensure safe use of the equipment.

[0081] As an optional implementation method, such as Figure 5 As shown, the inner crucible 22 is a graphite crucible, which includes an inner crucible body 222 with an open top and an inner crucible cover 221 that can be opened and closed on the top of the inner crucible body 222. The inner crucible body 222 is provided with a receiving cavity.

[0082] The accommodating cavity includes a first accommodating cavity 223 and a second accommodating cavity 224 connected and disposed below the first accommodating cavity 223, and the filtering mechanism 24 is disposed between the first accommodating cavity 223 and the second accommodating cavity 224.

[0083] During the production of high-purity magnesium rods, the magnesium ingot 6 to be melted and placed in the first accommodating cavity 223 is heated to form magnesium liquid to be filtered. After being filtered by the filtration mechanism 24, the magnesium liquid is formed into high-purity magnesium liquid and flows into the second accommodating cavity 224.

[0084] The filtration mechanism 24 is configured as a filter plate, which can effectively filter metal impurities and magnesium oxide inclusions, ensuring the cleanliness and tightness of the produced high-purity magnesium casting rods.

[0085] The discharge port 2241 is connected to the bottom of the second accommodating cavity 224. A conical valve mechanism 225 is provided at the position of the discharge port 2241. The conical valve mechanism 225 is used for the on / off control of the discharge port 2241.

[0086] As an optional implementation method, such as Figure 8 and Figure 9 As shown, the furnace body device 2 includes a flow divider 25, which is located on the bottom side of the discharge port 2241 and above the forming mold 41.

[0087] The distributor 25 includes a distributor body 251, a conical guide column 252 is provided inside the distributor body 251, the conical guide column 252 is coaxially arranged with the discharge port 2241, and a plurality of diversion ports 253 are uniformly arranged circumferentially relative to the conical guide column 252 inside the distributor body 251. The number of forming molds 41 is the same as the number of diversion ports 253, and each diversion port 253 is connected to the corresponding forming mold 41.

[0088] When the cone valve mechanism 225 is closed, the discharge port 2241 is blocked.

[0089] When the conical valve mechanism 225 is opened, the discharge port 2241 is opened, and the high-purity magnesium liquid flows into the distributor body 251 through the discharge port 2241, and is guided to different distribution ports 253 through the conical guide column 252, thereby entering the corresponding molding mold 41 for cooling and molding.

[0090] The cone valve mechanism 225 is linked with the lifting device 5. The lifting device 5 can drive the cone valve mechanism 225 to move up and down from the upper or lower side, thereby realizing the on / off control of the discharge port 2241.

[0091] Combination Figure 8 As shown, the cone valve mechanism 225 is configured as a cone-shaped sealing plug. When it moves upward, it opens the discharge port 2241. When it moves downward, it blocks the discharge port 2241. The top of the cone-shaped guide column 252 extends upward and forms an abutment column. The abutment column abuts against the bottom of the sealing plug. The bottom of the diverter 25 abuts against the top of the forming mold 41.

[0092] Thus, the lifting device 5 can move up and down, thereby driving the cone valve mechanism 225 to block and open the discharge port 2241.

[0093] As an optional implementation, such as Figure 5 , Figure 10 and Figure 11 As shown, a support frame 26 is provided inside the outer crucible 21. The support frame 26 includes an upper support ring 261 and a lower support ring 262 disposed below the upper support ring 261. The upper support ring 261 and the lower support ring 262 are connected by support rods 263. The number of support rods 263 is set to multiple, and all support rods 263 are evenly distributed along the circumference.

[0094] The upper support ring 261 is placed on the corresponding inner reinforcing rib ring, the inner crucible 22 is set on the upper support ring 261, and the distributor 25 is set on the lower support ring 262.

[0095] Multiple limiting grooves 254 are provided circumferentially on the outer wall of the diverter body 251. The number of limiting grooves 254 is the same as the number of support rods 263 and they correspond one-to-one. The support rods 263 pass through the corresponding limiting grooves 254. The limiting grooves 254 have a limiting function, enabling the diverter 25 to move stably up and down along the support rods 263.

[0096] As an optional implementation method, such as Figures 12-15 As shown, the cooling sleeve 31 is provided with a first cooling cavity 312 and a guide cavity 311.

[0097] The first cooling chamber 312 is connected to the first liquid inlet pipe 313 and the first liquid outlet pipe 314. During the production of high-purity magnesium rods, the coolant enters the first cooling chamber 312 through the first liquid inlet pipe 313 and is discharged through the first liquid outlet pipe 314. The first liquid inlet pipe 313, the first cooling chamber 312 and the first liquid outlet pipe 314 can form a first coolant circulation loop.

[0098] The first inlet pipe 313 is located below the first outlet pipe 314. The outlet end of the first inlet pipe 313 is located near the bottom wall of the first cooling chamber 312, and the inlet end of the first outlet pipe 314 is located near the top wall of the first cooling chamber 312. By adopting the bottom-inlet and top-outlet method, the coolant can be effectively ensured to fill the first cooling chamber 312, thereby improving the cooling effect of the cooling jacket 31.

[0099] The guide cavity 311 is arranged through the cooling sleeve 31 axially. The forming mold 41 passes through the guide cavity 311 and slides with the guide cavity 311. The number of guide cavities 311 is set to multiple, and all guide cavities 311 are evenly arranged around the cooling sleeve 31.

[0100] The cooling device 3 includes a positioning plate 33, which is connected to the top side of the cooling plate 32. The positioning plate 33 has a positioning groove 331 for positioning the forming mold 41 at the position corresponding to the guide cavity 311.

[0101] The number of guide cavities 311, positioning slots 331, diversion ports 253 of the diverter 25, and forming molds 41 are the same.

[0102] Optionally, such as Figure 13 As shown, the number of guide cavity 311, positioning through groove 331, flow divider 253 of flow divider 25 and forming mold 41 is set to three.

[0103] The positioning disk 33 has a mounting shaft 333 at its center. The mounting shaft 333 is mounted to the center of the top of the cooling disk 32. The positioning disk 33 can rotate relative to the cooling disk 32 through the mounting shaft 333, which facilitates the positioning and insertion of the molding die 41 into the guide cavity 311.

[0104] The positioning plate 33 is provided with an arc-shaped limiting groove 332. The center of the arc-shaped limiting groove 332 is concentric with the mounting shaft 333. The top side of the cooling plate 32 is provided with a limiting post 321. The limiting post 321 is inserted into the arc-shaped limiting groove 332. The arc-shaped limiting groove 332 has a limiting function and can effectively limit the relative rotation angle between the positioning plate 33 and the cooling plate 32.

[0105] Specifically, in actual use, according to actual needs, a distributor 25 with a corresponding number and size of diversion ports 253 can be set, or the distributor 25 can be cancelled. Correspondingly, a corresponding number and specification of forming molds 41, a cooling jacket 31 and a positioning plate 33 of corresponding specifications can be set, thereby realizing the production of high-purity magnesium casting rods of different specifications.

[0106] As an optional implementation, such as Figure 14 As shown, a support base 315 is connected to the outer wall of the cooling jacket 31, and multiple mounting holes for installing threaded fasteners are provided through the support base 315.

[0107] The bottom side of the support platform 12 is connected to the suspension 14, and the cooling jacket 31 is installed on the suspension 14 through the support seat 315.

[0108] As an optional implementation method, such as Figure 15 As shown, the cooling plate 32 includes an upper plate body 322, a lower plate body 323, a second liquid inlet pipe 325, and a second liquid outlet pipe 326.

[0109] The upper plate 322 is configured as a barrel structure with an open bottom side, and the lower plate 323 is configured as a barrel structure with an open top side. The lower plate 323 is welded to the lower side of the upper plate 322 and together with the upper plate 322, they form a second cooling chamber 324. The second cooling chamber 324 is a closed chamber. The liquid outlet end of the second liquid inlet pipe 325 is connected to the second cooling chamber 324, and the liquid inlet end of the second liquid outlet pipe 326 is connected to the second cooling chamber 324.

[0110] During the production of high-purity magnesium rods, coolant enters the second cooling chamber 324 through the second inlet pipe 325 and is discharged through the second outlet pipe 326. The second inlet pipe 325, the second cooling chamber 324, and the second outlet pipe 326 can form a second coolant circulation loop.

[0111] The inner top wall of the upper plate 322 is connected to a heat exchange tooth 3221. The heat exchange tooth 3221 is set in a ring shape. The heat exchange tooth 3221 can effectively increase the heat exchange area and improve the cooling effect of the cooling plate 32.

[0112] The heat exchanger teeth 3221 are arranged in a ring shape, and the number of heat exchanger teeth 3221 is set to multiple, with all heat exchanger teeth 3221 arranged at intervals from the inside to the outside.

[0113] Optionally, the heat exchanger fins 3221 are configured as a single-section structure, which is a continuous circular shape and has a large heat exchange area.

[0114] Alternatively, the heat exchanger fins 3221 are configured as a segmented structure, which are distributed sequentially at intervals and are in a circular shape, thus providing better flow performance.

[0115] like Figure 15 As shown, the inlet end of the second liquid outlet pipe 326 is located inside the second cooling chamber 324 and close to the top wall of the upper plate 322, while the outlet end of the second liquid inlet pipe 325 is located on the bottom wall of the lower plate 323.

[0116] By adopting a bottom-in, top-out cooling method, the coolant can be effectively filled into the second cooling chamber 324, thereby improving the cooling effect of the cooling plate 32.

[0117] Furthermore, the inlet end of the second outlet pipe 326 is located on the outside of the outermost heat exchange tooth 3221, and the bottom end of the outermost heat exchange tooth 3221 is provided with an outer chamfer 3222.

[0118] In this way, while ensuring that the coolant fills the cooling plate 32, the flow of coolant is improved.

[0119] As an optional implementation method, such as Figure 12 and Figure 17 As shown, the mold device 4 includes a mold box 42, which is connected to the bottom side of the cooling jacket 31. The cooling plate 32 can be raised and lowered inside the mold box 42.

[0120] The mold box 42 includes a box body and a door 421 that can be flipped on the box body via a hinge 4211. By opening and closing the door 421, the molding mold 41 can be put in and taken out.

[0121] The mold box 42 is connected to a second exhaust valve 422 for exhausting air.

[0122] The mold box 42 is connected to a pressure gauge 423, which can detect the pressure of the internal protective gas of the furnace body device 2 in real time.

[0123] The mold box 42 is connected to a vacuum valve 424 for vacuuming.

[0124] During the production of high-purity magnesium rods, the equipment is evacuated and argon is added to create an inert gas atmosphere. This not only prevents the introduction of pollution but also effectively eliminates oxidation problems of the magnesium ingots to be melted, cast, and formed, ensuring production quality.

[0125] As an optional implementation method, such as Figure 12 and Figure 16 As shown, the lifting device 5 includes a lifting pipe 51 and a lifting drive mechanism 52.

[0126] The top end of the lifting pipe 51 is connected to the cooling plate 32. The lifting pipe 51 and the cooling plate 32 rise and fall synchronously. The bottom end of the lifting pipe 51 passes through the mold box 42. The lifting pipe 51 is connected to the mold box 42 through the dynamic sealing mechanism 54.

[0127] The inlet end of the second inlet pipe 325 passes through the bottom end of the riser pipe 51 and is connected to an inlet connector 3251. The outlet end of the second outlet pipe 326 passes through the bottom end of the riser pipe 51 and is connected to an outlet connector 3261.

[0128] like Figure 18 As shown, the lifting drive mechanism 52 includes a power mechanism 521, a transmission mechanism 522, a lifting screw 523, and a lifting seat 524. The power mechanism 521 is connected to the lifting screw 523 through the transmission mechanism 522. A bracket 17 is provided below the support platform 12. The lifting screw 523 is vertically and rotatably mounted on the bracket 17. The lifting seat 524 is provided with a threaded hole. The lifting screw 523 passes through the threaded hole and is threadedly engaged with the threaded hole. The lifting pipe 51 is mounted on the lifting seat 524 and rises and falls synchronously with the lifting seat 524.

[0129] In actual use, the power mechanism 521 is started, and the transmission mechanism 522 drives the lifting screw 523 to rotate. The lifting seat 524 moves along the axial direction of the lifting screw 523, thereby driving the lifting tube 51 to rise and fall.

[0130] Optionally, the power mechanism 521 adopts an electric motor, and the transmission mechanism 522 adopts a gear transmission mechanism, belt transmission mechanism or chain transmission mechanism.

[0131] As an optional implementation, the lifting device 5 includes a guide mechanism 53, which includes a guide rail assembly 531 and a guide rod assembly 532.

[0132] The guide rail assembly 531 includes a vertical guide rail 5311, which is vertically mounted on the bracket 17. The lifting seat 524 is adapted to the vertical guide rail 5311 and is slidably mounted on the vertical guide rail 5311.

[0133] The guide rail assembly 531 can effectively limit the lifting trajectory of the lifting tube 51, making its lifting process more stable.

[0134] The guide rod assembly 532 includes a lifting rod body 5321 and a fixed rod sleeve 5322 that slides with the lifting rod body 5321. The top end of the lifting rod body 5321 is connected to the cooling plate 32, and the fixed rod sleeve 5322 is fixedly mounted on the mold box 42. The bottom end of the lifting rod body 5321 passes through the fixed rod sleeve 5322.

[0135] The guide rod assembly 532 can effectively prevent the lifting tube 51 from rotating radially during the lifting process, thereby further improving its lifting stability.

[0136] Preferably, the number of guide rod assemblies 532 is set to two, and the two guide rod assemblies 532 are symmetrically arranged with respect to the lifting tube 51.

[0137] Example 3

[0138] This invention provides a high-purity biomedical material casting process, comprising at least the following steps:

[0139] Step (I): Place the magnesium ingot 6 to be melted and cast into the inner crucible 22 and seal the outer crucible cover 211;

[0140] Step (II): Vacuum the furnace body device 2 and introduce inert protective gas.

[0141] Step (III): The magnesium ingot 6 to be cast is melted in the inner crucible 22 to form a magnesium liquid to be filtered.

[0142] Step (IV): After the magnesium liquid is filtered through the filtration mechanism 24 to remove oxide inclusions and metal impurities, a high-purity magnesium liquid is formed.

[0143] Step (V): The cone valve mechanism 225 is opened, the discharge port 2241 is connected, and the high-purity magnesium liquid is injected into the molding mold 41 through the discharge port 2241. The cooling medium enters the cooling jacket 31 and the cooling plate 32, and cools the high-purity magnesium liquid from the circumferential direction and the bottom surface of the molding mold 41, respectively, so that the high-purity magnesium liquid is formed into a high-purity magnesium rod.

[0144] Step (VI): When the high-purity magnesium casting rod reaches the molding quantity, the lifting device 5 is activated, which drives the cooling plate 32 and the molding mold 41 to move downward. After they are in place, the door 421 of the mold box 42 is opened, and the high-purity magnesium casting rod is taken out from the molding mold 41, and the melting and casting is completed.

[0145] This invention is applicable to the casting of high-purity magnesium or magnesium alloys, and is also applicable to the casting of other metals.

[0146] In the description of this application, it should be understood that the terms "upper", "lower", "inner", "outer", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and 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 this application.

[0147] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" or "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0148] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0149] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A high-purity biomedical material casting equipment, characterized in that, It includes furnace body assembly, cooling assembly, mold assembly, and lifting assembly, wherein: The furnace body device includes an outer crucible and an inner crucible disposed inside the outer crucible. A filtration mechanism is disposed inside the inner crucible, and a discharge port is disposed below the filtration mechanism. The cooling device includes a cooling jacket and a cooling plate. The cooling jacket is connected to the bottom side of the outer crucible, and the cooling plate is located on the lower side of the cooling jacket. The mold device includes a forming mold, which is disposed on the cooling plate. The top of the forming mold passes through the cooling sleeve and is positioned below the discharge port. The lifting device is connected to the cooling plate and can drive the cooling plate to rise and fall.

2. The high-purity biomedical material casting equipment according to claim 1, characterized in that, The furnace body assembly includes a split furnace body, which comprises a left furnace body, a right furnace body, and a moving drive mechanism, wherein: The left furnace body and the right furnace body are movably clamped on both sides of the outer crucible; The moving drive mechanism is connected to the left furnace body and / or the right furnace body, and can drive the left furnace body and / or the right furnace body to move.

3. The high-purity biomedical material casting equipment according to claim 2, characterized in that, The outer crucible includes an outer crucible lid, an outer crucible body, and a sealing ring, wherein: The outer crucible cover is openable and closable on the top of the outer crucible body. The outer crucible cover is provided with a vacuum interface, a safety valve, a first exhaust valve, and a rupture disc device. The outer crucible body is disposed between the left furnace body and the right furnace body, and the outer wall of the outer crucible body, the inner wall of the left furnace body, and the inner wall of the right furnace body form a first heating chamber and a second heating chamber distributed from top to bottom. The sealing ring is disposed between the outer crucible cover and the outer crucible body. The outer crucible cover is provided with an upper annular cooling channel corresponding to the position of the sealing ring, and the outer crucible body is provided with a lower annular cooling channel corresponding to the position of the sealing ring. The upper annular cooling channel and the lower annular cooling channel are used for cooling the sealing ring.

4. The high-purity biomedical material casting equipment according to claim 2, characterized in that, The inner crucible includes an inner crucible lid and an inner crucible body, wherein: The inner crucible lid is openable and closable on the top of the inner crucible body; The inner crucible contains a first accommodating cavity and a second accommodating cavity arranged sequentially from top to bottom. The filtration mechanism is located between the first accommodating cavity and the second accommodating cavity. The first accommodating cavity is used to hold magnesium ingots to be melted and cast, and the second accommodating cavity is used to hold filtered high-purity magnesium liquid. The discharge port is connected to the bottom of the second accommodating cavity, and a conical valve mechanism is provided at the position of the discharge port. The conical valve mechanism is linked with the lifting device.

5. The high-purity biomedical material casting equipment according to claim 1, characterized in that, The furnace body device includes a flow divider, which is disposed on the bottom side of the discharge port and located above the forming mold; The distributor includes a distributor body, a conical guide column is provided inside the distributor body, the conical guide column is coaxially arranged with the discharge port, and a plurality of diversion ports are uniformly arranged circumferentially relative to the conical guide column inside the distributor body. The number of forming molds is the same as the number of diversion ports, and each diversion port is connected to the corresponding forming mold.

6. The high-purity biomedical material casting equipment according to claim 1, characterized in that, The cooling jacket is provided with a first cooling chamber and a guide chamber, wherein: The first cooling chamber is connected to a first liquid inlet pipe and a first liquid outlet pipe, with the first liquid inlet pipe located below the first liquid outlet pipe; The guide cavity is provided through the cooling sleeve along the axial direction, and the molding die passes through the guide cavity and slides with the guide cavity.

7. The high-purity biomedical material casting equipment according to claim 1, characterized in that, The cooling plate has a second cooling chamber inside, and a second liquid inlet pipe and a second liquid outlet pipe are provided on the cooling plate in communication with the second cooling chamber, wherein: The inner top wall of the second cooling chamber is connected to a heat exchange tooth plate, which is arranged in a ring shape. The number of heat exchange tooth plates is set to multiple, and all the heat exchange tooth plates are arranged at intervals from the inside to the outside. The inlet end of the second liquid outlet pipe is located inside the second cooling chamber and near the top wall of the second cooling chamber, while the outlet end of the second liquid outlet pipe is located on the bottom wall of the second cooling chamber. The bottom end of the outermost heat exchange tooth is provided with an outer chamfer, and the liquid inlet end of the second liquid outlet pipe is located on the outside of the outermost heat exchange tooth.

8. The high-purity biomedical material casting equipment according to claim 1, characterized in that, The mold device includes a mold box, which is connected to the bottom side of the cooling jacket, and the cooling plate can be raised and lowered inside the mold box; The mold box is equipped with a door for taking out and putting in the forming mold; The mold box is equipped with a second exhaust valve, a pressure gauge, and a vacuum valve.

9. The high-purity biomedical material casting equipment according to claim 8, characterized in that, The lifting device includes a lifting tube, a lifting drive mechanism, and a guide mechanism, wherein: The top end of the lifting pipe is connected to the cooling plate, the bottom end of the lifting pipe passes through the mold box, and the lifting pipe is connected to the mold box through a dynamic sealing mechanism; The lifting drive mechanism is connected to the lifting tube and can drive the lifting tube to move up and down; The guiding mechanism includes a vertically arranged guide member and a movable member movably arranged on the guide member. The lifting tube is connected to the movable member and rises and falls synchronously.

10. A high-purity biomedical material casting process, characterized in that, Includes at least the following steps: Step (I): Place the magnesium ingot to be melted and cast in the inner crucible and seal the outer crucible; Step (II) involves evacuating the furnace body and introducing an inert protective gas. Step (III): The magnesium ingot to be cast is melted in the inner crucible to form a magnesium liquid to be filtered. Step (IV): After the magnesium liquid to be filtered is filtered by the filtration mechanism to remove oxide inclusions and metal impurities, a high-purity magnesium liquid is formed. Step (V): High-purity magnesium liquid is injected into the molding die through the conical valve mechanism of the discharge port. The cooling jacket and cooling plate cool the high-purity magnesium liquid from the circumferential direction and the bottom surface of the molding die, respectively, so that the high-purity magnesium liquid is formed into high-purity magnesium rods. Step (VI): When the high-purity magnesium casting rod reaches the molding quantity, the lifting device is activated, which drives the cooling plate and the molding mold to move downward. After moving into place, the high-purity magnesium casting rod is taken out from the molding mold, and the melting and casting is completed.

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