Lead bismuth alloy casting apparatus and method

Abstract

The application discloses a lead-bismuth alloy casting device and method, and relates to the field of metal casting processing equipment.The device comprises a device frame and a fixing disc fixedly installed on the top of the device frame, a lower mold is installed on the top of the fixing disc, an upper mold is arranged above the lower mold, a pouring hole is formed in the top of the upper mold, a feeding hopper is fixedly installed on the inner side of the pouring hole, a pouring bucket is installed on the top of the feeding hopper, and the feeding hopper and the pouring bucket are both hollow circular table structures; the device further comprises a feeding mechanism used for uniformly injecting hot-melt metal raw materials into the cavity of the upper mold and the lower mold, and the feeding mechanism comprises a rotating disc arranged on the inner side of the feeding hopper; through the feeding mechanism, the hot-melt metal raw materials can be injected into the feeding hopper through the pouring bucket, the hot-melt metal raw materials can fall on the top of the rotating disc, the rotating disc can be rotated, and the hot-melt metal raw materials can be injected into the cavity formed by the lower mold and the upper mold in the shape of an umbrella by the centrifugal force of the rotating disc, so that the uniformity of the feeding is improved.

Description

Technical Field

[0001] This invention relates to the field of metal casting equipment, specifically to a lead-bismuth alloy casting apparatus and method. Background Technology

[0002] Lead-bismuth alloy is an alloy composed of metallic lead and bismuth. Molten lead-bismuth alloy has excellent fluidity and low shrinkage, making it very suitable for precision casting. It can perfectly fill the fine structure of the mold and manufacture parts with complex shapes and precise dimensions without the need for a lot of subsequent machining. It is often used to make printing type molds, low melting point molds, counterweights, and complex nuclear reactor components.

[0003] When casting lead-bismuth alloys, the sprue needs to be aligned with the sprue cup of the mold first, and the molten metal is injected into the mold cavity through the sprue. In order to improve casting efficiency, existing casting devices use multiple sprues to inject molten metal raw materials. However, the molten metal raw materials entering the cavity fall into the bottom of the cavity in a columnar shape. It is necessary to rely on the fluidity of the molten metal raw materials to fill the inside of the cavity. This will cause incomplete casting at the inner corners of the cavity, making it difficult to ensure that the molten metal raw materials can be injected into the cavity evenly. Summary of the Invention

[0004] The purpose of this invention is to provide a lead-bismuth alloy casting apparatus and method to solve the problems mentioned in the background art.

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

[0006] A lead-bismuth alloy casting apparatus includes: an apparatus frame and a fixed plate fixedly installed on the top of the apparatus frame; a lower mold is fixedly installed on the top of the fixed plate; an upper mold is disposed above the lower mold; a casting hole is opened on the top of the upper mold; a feeding hopper is fixedly installed inside the casting hole; a casting hopper is fixedly installed on the top of the feeding hopper; and both the feeding hopper and the casting hopper are hollow frustum structures. The apparatus further includes: an injection mechanism for uniformly injecting hot-melt metal raw materials into the cavities of the upper mold and the lower mold; the injection mechanism is installed inside the feeding hopper; and the injection mechanism includes components disposed on the... A turntable inside the feed hopper allows molten metal raw material to be injected into the mold cavity in an umbrella shape. A slag removal mechanism is used to remove slag from the surface of the molten metal raw material. The slag removal mechanism is installed inside the turntable and includes a cavity opened inside the turntable. A spiral scraper is provided inside the cavity to remove slag from the surface of the molten metal raw material. A demolding mechanism is used to demold the finished product after casting. The demolding mechanism is installed on the top of the lower mold and includes a push ring located on the top of the lower mold. The push ring can push the finished product upwards and detach it from the lower mold.

[0007] Preferably, the injection mechanism further includes a pull rod fixedly installed on the top of the turntable. An installation ring is fixedly installed at the end of the pull rod away from the turntable. An annular frame is fitted around the outer side of the installation ring. Push plates are fixedly installed on both sides of the annular frame. A tripod is fixedly installed on the top of the upper mold. An electric telescopic rod is fixedly installed between the top of the tripod and the bottom of the push plate. A guide hole for the pull rod to slide in a limited position is opened on the top of the turntable. A sealing block is fixedly installed on the top of the turntable. A rotating ring is fitted around the outer side of the pull rod. The rotating ring is rotatably installed on the top of the tripod. Multiple centrally symmetrically distributed sliding teeth are fixedly installed on the inner side of the rotating ring. A long groove for the sliding teeth to slide in a limited position is opened on the outer side of the pull rod. A first motor is fixedly installed on the inner side of the tripod. A synchronous belt is rotatably installed between the output end of the first motor and the rotating ring. The top of the turntable has a frustum structure, and the inclination angle of the outer side of the turntable is smaller than the inclination angle of the inner side of the feed hopper.

[0008] Preferably, the slag removal mechanism further includes an mounting cylinder sleeved on the outside of the spiral scraper, the pull rod is a hollow structure and sleeved on the outside of the mounting cylinder, a feed box is fixedly installed at the top of the mounting cylinder, the top of the spiral scraper extends to the inside of the feed box, a support arm is fixedly installed between the feed box and the top of the tripod, a second motor is fixedly installed at the top of the feed box, the output end of the second motor is fixedly connected to the top of the spiral scraper, a discharge pipe is fixedly installed at the bottom of the feed box, a plurality of centrally symmetrically distributed rotating plates are fixedly installed at the top of the spiral scraper, a scraper is fixedly installed at the bottom of the rotating plate, and the outer side of the scraper contacts the inner side of the feed box.

[0009] Preferably, the demolding mechanism further includes a positioning frame fixedly installed inside the device frame. A first screw is rotatably installed inside the positioning frame. A third motor is fixedly installed inside the device frame. The output end of the third motor is fixedly connected to the bottom end of the first screw. Three centrally symmetrically distributed fixing plates are fixedly installed on the outer side of the upper mold. An L-shaped support rod that slides through the top of the device frame is fixedly installed at the bottom of the fixing plate. A first moving block is fixedly installed between the three L-shaped support rods. The first moving block is threaded onto the outer side of the first screw. A second screw is fixedly installed at the top of the first screw, and the top of the second screw is rotatably installed at the bottom of the fixing plate. An annular groove for the push ring to be inserted is opened at the top of the lower mold. Three centrally symmetrically distributed push rods are fixedly installed at the bottom of the push ring. The push rods pass through the lower mold and the fixing plate. A second moving block is fixedly installed between the three push rods. The second moving block is threaded onto the outer side of the second screw, and the pitch of the first screw is greater than the pitch of the second screw.

[0010] Preferably, a baffle plate is fixedly installed between the inner side of the casting hopper and the outer side of the tripod, and the baffle plate has an arc-shaped structure.

[0011] Preferably, a sleeve is provided at the bottom of the annular frame, and the sleeve is fixedly installed on the top of the tripod, and the sleeve is fitted onto the outside of the pull rod.

[0012] Preferably, a limiting cylinder is fixedly installed at the bottom of the feed box, and the limiting cylinder is located directly above the pull rod.

[0013] Preferably, the bottom of the feed box has a hollow frustum structure, and the outer side of the scraper is in contact with the outer side of the spiral scraper.

[0014] Preferably, the bottom end of the push rod extends below the second moving block, and the top of the positioning frame has a cavity for the push rod to be inserted into a limiting position.

[0015] A method for casting a lead-bismuth alloy includes the following steps:

[0016] S1: During the injection stage, hot-melt metal raw materials are poured between the baffle plate and the casting hopper, and the first motor is started to make the rotating ring drive the pull rod to rotate. The centrifugal force of the rotating turntable is used to make the hot-melt metal raw materials evenly distributed between the upper mold and the lower mold.

[0017] S2: During the slag removal stage, the two electric telescopic rods and the second motor are activated to move the ring frame upward by pulling the rod, so that the sealing block at the bottom of the turntable seals the feed hopper. The second motor scrapes off the slag on the surface of the hot molten metal raw material through the spiral scraper and conveys the discharge material, so that the raw material in the lower mold and the upper mold cools and forms.

[0018] S3: During the demolding stage, the third motor is started, causing the first screw to push the three L-shaped support rods away from the finished product and the lower mold through the first moving block;

[0019] S4: During the feeding stage, the first screw drives the second screw to rotate, causing the second moving block to push the push ring upward through the push rod, pushing the finished product out of the lower mold and removing the finished product.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention uses an injection mechanism to inject hot-melt metal raw materials into a feed hopper through a casting hopper. The hot-melt metal raw materials can fall on the top of a turntable, causing the turntable to rotate. The centrifugal force of the rotating turntable injects the hot-melt metal raw materials into the cavity formed by the lower and upper molds in an umbrella shape, thereby improving the uniformity of injection.

[0022] This invention, through a slag-removing mechanism, enables the spiral scraper to remove slag from the surface of the molten metal raw material after the sealing block seals the feed hopper. The slag is then transported into the feed box and discharged through the discharge pipe, thereby achieving the effect of slag removal and ensuring the quality of the finished product.

[0023] This invention, through a demolding mechanism, enables three L-shaped support rods to push the upper mold and lower mold apart after the hot-melt metal raw material has been cast and cooled, and pushes the bottom of the finished product with a push ring, facilitating the separation of the finished product from the lower mold and thus improving the demolding efficiency of the finished product. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a partial cross-sectional view of the device frame and the fixed disk in this invention.

[0026] Figure 3 This is a schematic diagram of a partial cross-sectional structure of the push ring and the lower mold in this invention;

[0027] Figure 4 This is a partial cross-sectional view of the feed hopper and sealing block in this invention.

[0028] Figure 5 This is a partial cross-sectional view of the turntable and tripod in this invention.

[0029] Figure 6 This is a schematic diagram of a partial cross-sectional structure of the rotating ring and sliding teeth in this invention;

[0030] Figure 7 This is a partial cross-sectional structural diagram of the mounting cylinder and tie rod in this invention;

[0031] Figure 8 This is a partial cross-sectional structural diagram of the scraper and spiral scraper in this invention.

[0032] In the diagram: 1. Device frame; 2. Fixed plate; 3. Lower mold; 4. Upper mold; 5. Feed hopper; 6. Casting hopper; 7. Turntable; 8. Spiral scraper; 9. Push ring; 10. Pull rod; 11. Mounting ring; 12. Annular frame; 13. Push plate; 14. Tripod; 15. Electric telescopic rod; 16. Sealing block; 17. Rotary ring; 18. Sliding tooth; 19. First motor; 20. Synchronous belt; 21. Mounting cylinder; 22. Feed box; 23. Support arm; 24. Second motor; 25. Discharge pipe; 26. Rotating plate; 27. Scraper; 28. Positioning frame; 29. ​​First screw; 30. Third motor; 31. Fixed plate; 32. L-shaped support rod; 33. First moving block; 34. Second screw; 35. Push rod; 36. Second moving block; 37. Baffle plate; 38. Sleeve; 39. Limiting cylinder. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figures 1-8 The diagram shows a lead-bismuth alloy casting device, which includes a device frame 1 and a fixed plate 2 fixedly installed on the top of the device frame 1. A lower mold 3 is fixedly installed on the top of the fixed plate 2, and an upper mold 4 is provided above the lower mold 3. A casting hole is opened on the top of the upper mold 4, and a feeding hopper 5 is fixedly installed inside the casting hole. A casting hopper 6 is fixedly installed on the top of the feeding hopper 5. Both the feeding hopper 5 and the casting hopper 6 are hollow frustum structures, which allows the operator to inject hot molten metal raw materials into the casting hopper 6. The hot molten metal raw materials enter the cavity formed by the upper mold 4 and the lower mold 3 through the feeding hopper 5. After cooling and demolding, the finished product is obtained.

[0035] The injection mechanism includes a turntable 7 located inside the feed hopper 5. The turntable 7 allows hot-melt metal raw materials to be injected into the mold cavity in an umbrella shape. The injection mechanism also includes a pull rod 10 fixedly installed on the top of the turntable 7. An installation ring 11 is fixedly installed on the end of the pull rod 10 away from the turntable 7. An annular frame 12 is fitted on the outer side of the installation ring 11. Push plates 13 are fixedly installed on both sides of the annular frame 12. A tripod 14 is fixedly installed on the top of the upper mold 4. An electric telescopic rod 15 is fixedly installed between the top of the tripod 14 and the bottom of the push plate 13. A guide hole is provided on the top of the tripod 14 for the pull rod 10 to slide in a limited position. A sealing block 16 is fixedly installed on the top of the turntable 7. Two electric telescopic rods 15 can push two push plates 13 upward respectively, causing the push plates 13 to drive the annular frame 12 to move synchronously. The annular frame 12 drives the pull rod 10 upward through the mounting ring 11, causing the pull rod 10 to drive the sealing block 16 to abut against the inner side of the feed hopper 5 through the turntable 7, thereby sealing the feed hopper 5 and facilitating the cooling and forming of the hot-melt metal raw material. A rotating ring 17 is sleeved on the outer side of the pull rod 10. The rotating ring 17 is rotatably installed on the top of the tripod 14. Multiple centrally symmetrically distributed sliding teeth 18 are fixedly installed on the inner side of the rotating ring 17. The outer side of the 10 has a long groove for the sliding teeth 18 to limit the sliding. The first motor 19 is fixedly installed on the inner side of the tripod 14. The output end of the first motor 19 is rotatably connected to the rotating ring 17 with a synchronous belt 20. The top of the turntable 7 is a frustum structure, and the inclination angle of the outer side of the turntable 7 is smaller than the inclination angle of the inner side of the feed hopper 5. The first motor 19 can drive the rotating ring 17 to rotate through the synchronous belt 20, so that the rotating ring 17 drives the pull rod 10 to rotate through the long groove on the outer side of the sliding teeth 18. The pull rod 10 can then drive the turntable 7 to rotate. Using the centrifugal force of the rotating turntable 7, the heat in the feed hopper 5 is dissipated. Molten metal material falls in an umbrella shape into the cavity formed by the lower mold 3 and the upper mold 4, improving the uniformity of the injection. A baffle plate 37 is fixedly installed between the inner side of the casting hopper 6 and the outer side of the tripod 14. The baffle plate 37 has an arc-shaped structure, which makes it easy for workers to inject the molten metal material into the feed hopper 5 through the baffle plate 37 and the casting hopper 6. A sleeve 38 is provided at the bottom of the annular frame 12, and the sleeve 38 is fixedly installed on the top of the tripod 14. The sleeve 38 is sleeved on the outer side of the pull rod 10, so that the sleeve 38 provides a limit and support for the downward movement of the annular frame 12, ensuring the maximum downward distance of the annular frame 12.

[0036] Example 2: Please refer to Figures 4-8This embodiment further explains Example 1. The slag removal mechanism shown in the figure includes a cavity opened inside the turntable 7, and a spiral scraper 8 is provided inside the cavity. The spiral scraper 8 can clean the slag on the surface of the molten metal raw material. The slag removal mechanism also includes an installation cylinder 21 sleeved on the outside of the spiral scraper 8. The pull rod 10 is a hollow structure and is sleeved on the outside of the installation cylinder 21. A feed box 22 is fixedly installed at the top of the installation cylinder 21. The top of the spiral scraper 8 extends to the inside of the feed box 22. The feed box 22 and... A support arm 23 is fixedly installed at the top of the tripod 14. A second motor 24 is fixedly installed at the top of the feed box 22. The output end of the second motor 24 is fixedly connected to the top of the spiral scraper 8. A discharge pipe 25 is fixedly installed at the bottom of the feed box 22. After the sealing block 16 seals the feed hopper 5, the bottom of the sealing block 16 can be aligned with the bottom of the mounting cylinder 21. The second motor 24 drives the spiral scraper 8 to rotate, causing the spiral scraper 8 to scrape out the scum on the surface of the molten metal raw material in the feed hopper 5 and transport the scum to... The material is discharged through the discharge pipe 25 into the feed box 22. Multiple rotating plates 26, arranged symmetrically in a central configuration, are fixedly installed at the top of the spiral scraper 8. Scrapers 27 are fixedly installed at the bottom of the rotating plates 26, with the outer side of the scrapers 27 contacting the inner side of the feed box 22. The spiral scraper 8 drives the multiple rotating plates 26 to rotate in a circular motion, causing the rotating plates 26 to move the scrapers 27 along the inner side of the feed box 22, facilitating the timely pushing of scum into the discharge pipe 25. A limiting cylinder 39 is fixedly installed at the bottom of the feed box 22, and the limiting cylinder 39 is located on the pull rod 1. Directly above 0, when the pull rod 10 moves upward, it can contact the bottom of the limiting cylinder 39, providing support for the upward movement of the pull rod 10, ensuring that the sealing block 16 abuts against the inner side of the feed hopper 5. The bottom of the feed box 22 has a hollow frustum structure, and the outer side of the scraper 27 contacts the outer side of the spiral scraper 8. When the spiral scraper 8 conveys the scum upward, the scum can enter the discharge pipe 25 through the inclined surface at the bottom of the feed box 22, which is convenient for timely discharge. In addition, the scraper 27 can scrape off the scum remaining on the spiral scraper 8.

[0037] Example 3: Please refer to Figures 1-4This embodiment further illustrates other embodiments. The demolding mechanism shown in the figure includes a push ring 9 disposed on the top of the lower mold 3. The push ring 9 can push the finished product upwards and detach it from the lower mold 3. The demolding mechanism also includes a positioning frame 28 fixedly installed inside the device frame 1. A first screw 29 is rotatably installed on the inner side of the positioning frame 28. A third motor 30 is fixedly installed on the inner side of the device frame 1. The output end of the third motor 30 is fixedly connected to the bottom end of the first screw 29. Three centrally symmetrically distributed fixing plates 31 are fixedly installed on the outer side of the upper mold 4. A sliding plate is fixedly installed at the bottom of the fixing plate 31. An L-shaped support rod 32 runs through the top of the device frame 1. A first moving block 33 is fixedly installed between the three L-shaped support rods 32. The first moving block 33 is threaded onto the outside of the first screw 29. A third motor 30 can drive the first screw 29 to rotate, causing the first screw 29 to drive the three L-shaped support rods 32 to move along the top of the device frame 1 through the first moving block 33. The three L-shaped support rods 32 push the upper mold 4 upward through three fixed plates 31, so that the upper mold 4 is away from the finished product for demolding. A second screw 34 is fixedly installed at the top of the first screw 29, and the top of the second screw 34... The end is rotatably mounted on the bottom of the fixed plate 2. The top of the lower mold 3 has an annular groove for the push ring 9 to be inserted and positioned. Three push rods 35 are fixedly mounted on the bottom of the push ring 9 in a centrally symmetrical distribution. The push rods 35 pass through the lower mold 3 and the fixed plate 2, and a second moving block 36 is fixedly mounted between the three push rods 35. The second moving block 36 is threaded onto the outside of the second screw 34, and the pitch of the first screw 29 is greater than the pitch of the second screw 34. When the first screw 29 rotates, it can drive the second screw 34 to rotate synchronously, so that the second screw 34 drives the three push rods 35 through the second moving block 36. Moving upward along the inner side of the fixed plate 2, the three push rods 35 push the push ring 9 upward, and the moving speed of the push ring 9 is slower than the moving speed of the upper mold 4, so that the push ring 9 can push the finished product to separate from the lower mold 3. The bottom end of the push rod 35 extends to the bottom of the second moving block 36, and the top of the positioning frame 28 is provided with a cavity for the push rod 35 to be inserted. When the second moving block 36 moves, it can drive the push rod 35 to move along the cavity of the positioning frame 28, so that the positioning frame 28 provides auxiliary support for the push rod 35, ensuring that the push rod 35 can smoothly push the finished product to separate from the lower mold 3 through the push ring 9.

[0038] Working principle: First, the operator starts the first motor 19 and pours the molten metal material between the casting hopper 6 and the baffle plate 37, allowing the molten metal material to enter the feed hopper 5 and fall onto the turntable 7. The first motor 19 drives the rotating ring 17 to rotate via the synchronous belt 20. The rotating ring 17 drives the pull rod 10 to rotate via the sliding teeth 18 and the long groove on the outside of the pull rod 10. The pull rod 10 drives the turntable 7 to rotate. Using the centrifugal force of the rotating turntable 7, the molten metal material in the feed hopper 5 falls in an umbrella shape into the cavity formed by the lower mold 3 and the upper mold 4, facilitating the molten metal material to fall onto the side of the cavity. Then, the operator starts the two electric telescopic rods 15, which push the two push plates 13 upwards respectively. The push plates 13 drive the annular frame 12 to move synchronously, causing the annular frame 12 to drive the pull rod 10 along the outside of the mounting cylinder 21 and the tripod 14 via the mounting ring 11. The inner side moves upward, and the pull rod 10 drives the sealing block 16 to abut against the inner side of the feed hopper 5 through the turntable 7 to achieve the sealing of the feed hopper 5. During the movement of the turntable 7, all the hot melt metal raw materials in the feed hopper 5 enter the cavity. At this time, the bottom of the sealing block 16 is aligned with the bottom of the mounting cylinder 21. The operator starts the second motor 24, which drives the spiral scraper 8 to rotate. The spiral scraper 8 scrapes off the scum on the surface of the hot melt metal raw material in the feed hopper 5 and transports the scum to the feed box 22. The spiral scraper 8 drives multiple rotating plates 26 to make circular motion, which drives the scraper 27 to make circular motion along the outer side of the spiral scraper 8 and the inner side of the feed box 22, pushing the scum into the discharge pipe 25 to facilitate the discharge of the scum. This completes the injection of hot melt metal raw materials, thereby achieving the effect of uniform injection and timely discharge of the scum on the surface of the hot melt metal raw material.

[0039] After the hot-melted metal material in the upper mold 4 and lower mold 3 cools and solidifies, the operator starts the third motor 30. The third motor 30 drives the first screw 29 to rotate, causing the first screw 29 to drive the three L-shaped support rods 32 to move along the top of the device frame 1 through the first moving block 33. The L-shaped support rods 32 push the fixed plate 31 to move, causing the fixed plate 31 to push the upper mold 4 upward. The upper mold 4 moves away from the finished product for demolding. At the same time, the first screw 29 drives the second screw 34 to rotate synchronously, causing the second screw 34 to drive the three push rods 35 to move upward along the inner side of the fixed plate 2 through the second moving block 36. The three push rods 35 push the push ring 9 upward, causing the push ring 9 to push the finished product to separate from the lower mold 3, thereby improving the convenience of demolding and removing the finished product.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lead-bismuth alloy casting apparatus, characterized in that, include: The device frame is fixedly installed on the top of the device frame. A lower mold is installed on the top of the fixed plate, and an upper mold is set above the lower mold. A casting hole is opened on the top of the upper mold. A feed hopper is fixedly installed on the inner side of the casting hole, and a casting hopper is installed on the top of the feed hopper. Both the feed hopper and the casting hopper are hollow frustum structures. Also includes: The injection mechanism is used to evenly inject hot-melt metal raw material into the cavities of the upper and lower molds. The injection mechanism is installed inside the feed hopper and includes a turntable located inside the feed hopper. The turntable allows the hot-melt metal raw material to be injected into the cavity in an umbrella shape. The injection mechanism also includes a pull rod installed on the top of the turntable. A mounting ring is installed at the end of the pull rod away from the turntable. An annular frame is fitted around the outer side of the mounting ring, and push plates are installed on both sides of the annular frame. A tripod is installed on the top of the upper mold, and the top of the tripod is fixed to the bottom of the push plate. The tripod is equipped with an electric telescopic rod. The top of the tripod has a guide hole for the sliding of the rod. The top of the turntable has a sealing block. A rotating ring is fitted on the outside of the rod and is rotatably mounted on the top of the tripod. Multiple sliding teeth are installed on the inside of the rotating ring. The outside of the rod has a long groove for the sliding teeth to be limited. The inside of the tripod has a first motor. A synchronous belt is rotatably installed between the output end of the first motor and the rotating ring. The top of the turntable has a frustum structure, and the inclination angle of the outside of the turntable is smaller than the inclination angle of the inside of the feed hopper. The slag removal mechanism is used to remove slag from the surface of the hot molten metal raw material liquid. The slag removal mechanism is installed on the inner side of the turntable. The slag removal mechanism includes a cavity opened on the inner side of the turntable, and a spiral scraper is provided on the inner side of the cavity. The spiral scraper can remove slag from the surface of the hot molten metal raw material liquid. The demolding mechanism is used to demold the finished product after casting. The demolding mechanism is installed on the top of the lower mold and includes a push ring set on the top of the lower mold. The push ring can push the finished product upward and separate it from the lower mold.

2. The lead-bismuth alloy casting apparatus according to claim 1, characterized in that: The slag removal mechanism also includes an installation cylinder sleeved on the outside of the spiral scraper. The pull rod is a hollow structure and is sleeved on the outside of the installation cylinder. A feed box is installed at the top of the installation cylinder. The top of the spiral scraper extends to the inside of the feed box. A support arm is installed between the feed box and the top of the tripod. A second motor is installed at the top of the feed box. The output end of the second motor is fixedly connected to the top of the spiral scraper. A discharge pipe is installed at the bottom of the feed box. Multiple rotating plates are fixedly installed at the top of the spiral scraper. Scrapers are installed at the bottom of the rotating plates, and the outer side of the scrapers contacts the inner side of the feed box.

3. The lead-bismuth alloy casting apparatus according to claim 2, characterized in that: The demolding mechanism also includes a positioning frame installed inside the device frame. A first screw is rotatably installed inside the positioning frame. A third motor is installed inside the device frame. The output end of the third motor is fixedly connected to the bottom end of the first screw. Three fixing plates are installed on the outside of the upper mold. An L-shaped support rod that slides through the top of the device frame is installed at the bottom of the fixing plate. A first moving block is installed between the three L-shaped support rods. The first moving block is threaded onto the outside of the first screw. A second screw is fixedly installed at the top of the first screw, and the top of the second screw is rotatably installed at the bottom of the fixing plate. An annular groove for the push ring to be inserted is opened at the top of the lower mold. Three push rods that are centrally symmetrically distributed are installed at the bottom of the push ring. The push rods pass through the lower mold and the fixing plate. A second moving block is installed between the three push rods. The second moving block is threaded onto the outside of the second screw. The pitch of the first screw is greater than the pitch of the second screw.

4. The lead-bismuth alloy casting apparatus according to claim 3, characterized in that: A baffle plate is installed between the inner side of the casting hopper and the outer side of the tripod, and the baffle plate has an arc-shaped structure.

5. The lead-bismuth alloy casting apparatus according to claim 1, characterized in that: The bottom of the annular frame is provided with a sleeve, which is installed on the top of the tripod and is fitted onto the outside of the pull rod.

6. The lead-bismuth alloy casting apparatus according to claim 2, characterized in that: The bottom of the feed box is equipped with a limiting cylinder, which is located directly above the pull rod.

7. The lead-bismuth alloy casting apparatus according to claim 2, characterized in that: The bottom of the feed box has a hollow frustum structure, and the outer side of the scraper is in contact with the outer side of the spiral scraper.

8. The lead-bismuth alloy casting apparatus according to claim 3, characterized in that: The bottom end of the push rod extends below the second moving block, and the top of the positioning frame has a cavity for the push rod to be inserted for limiting.

9. A method for casting a lead-bismuth alloy, using the lead-bismuth alloy casting apparatus as described in claim 4, characterized in that: Includes the following steps: S1: During the injection stage, hot-melt metal raw materials are poured between the baffle plate and the casting hopper, and the first motor is started to make the rotating ring drive the pull rod to rotate. The centrifugal force of the rotating turntable is used to make the hot-melt metal raw materials evenly distributed between the upper mold and the lower mold. S2: During the slag removal stage, the two electric telescopic rods and the second motor are activated to move the ring frame upward by pulling the rod, so that the sealing block at the bottom of the turntable seals the feed hopper. The second motor scrapes off the slag on the surface of the hot molten metal raw material through the spiral scraper and conveys the discharge material, so that the raw material in the lower mold and the upper mold cools and forms. S3: During the demolding stage, the third motor is started, causing the first screw to push the three L-shaped support rods away from the finished product and the lower mold through the first moving block; S4: During the feeding stage, the first screw drives the second screw to rotate, causing the second moving block to push the push ring upward through the push rod, pushing the finished product out of the lower mold and removing the finished product.

Images