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CN-121972637-A - Lead bismuth alloy casting device and method

CN121972637ACN 121972637 ACN121972637 ACN 121972637ACN-121972637-A

Abstract

The invention discloses a lead bismuth alloy casting device and a method, which relate to the field of metal casting processing equipment and comprise a device frame and a fixed disc fixedly arranged at the top of the device frame, wherein a lower die is arranged at the top of the fixed disc, an upper die is arranged above the lower die, a casting hole is formed in the top of the upper die, a feed hopper is fixedly arranged at the inner side of the casting hole, a casting hopper is arranged at the top of the feed hopper, the feed hopper and the casting hopper are both of hollow round platform structures, and the lead bismuth alloy casting device further comprises a material injection mechanism which is used for uniformly injecting hot-melt metal raw materials into cavities of the upper die and the lower die and comprises a rotary table arranged at the inner side of the feed hopper.

Inventors

  • ZHANG GUANGQING

Assignees

  • 河北玉核科技有限公司

Dates

Publication Date
20260505
Application Date
20260407

Claims (10)

  1. 1. The lead bismuth alloy casting device is characterized by comprising a device frame (1) and a fixed disc (2) fixedly arranged at the top of the device frame (1), wherein a lower die (3) is arranged at the top of the fixed disc (2), an upper die (4) is arranged above the lower die (3), a casting hole is formed in the top of the upper die (4), a feeding hopper (5) is fixedly arranged at the inner side of the casting hole, a casting hopper (6) is arranged at the top of the feeding hopper (5), and the feeding hopper (5) and the casting hopper (6) are of hollow round platform structures; Further comprises: The injection mechanism is used for uniformly injecting the hot-melt metal raw materials into the cavities of the upper die (4) and the lower die (3), the injection mechanism is arranged on the inner side of the feed hopper (5), the injection mechanism comprises a rotary disc (7) arranged on the inner side of the feed hopper (5), and the rotary disc (7) can enable the hot-melt metal raw materials to be injected into the cavities in an umbrella shape; The slag removing mechanism is used for cleaning scum on the liquid level of the hot-melt metal raw material and is arranged on the inner side of the rotary table (7), the slag removing mechanism comprises a cavity formed in the inner side of the rotary table (7), a spiral scraping strip (8) is arranged on the inner side of the cavity, and the spiral scraping strip (8) can clean scum on the liquid level of the hot-melt metal raw material; The demoulding mechanism is used for demoulding finished products after casting, the demoulding mechanism is arranged at the top of the lower mould (3), the demoulding mechanism comprises a push ring (9) arranged at the top of the lower mould (3), and the push ring (9) can push the finished products upwards to be separated from the lower mould (3).
  2. 2. The lead bismuth alloy casting device according to claim 1, wherein the material injecting mechanism further comprises a pull rod (10) arranged at the top of the rotary table (7), one end of the pull rod (10) far away from the rotary table (7) is provided with a mounting ring (11), an annular frame (12) is sleeved outside the mounting ring (11), push plates (13) are arranged on two sides of the annular frame (12), a tripod (14) is arranged at the top of the upper die (4), an electric telescopic rod (15) is fixedly arranged between the top of the tripod (14) and the bottom of the push plate (13), a guide sliding hole for limiting sliding of the pull rod (10) is formed at the top of the tripod (14), a sealing block (16) is arranged at the top of the rotary table (7), a rotating ring (17) is sleeved outside the pull rod (10), a plurality of teeth (18) are arranged on the inner sides of the rotating ring (17) in a rotating mode and are respectively installed on the top of the tripod (14), a motor (14) is fixedly arranged at the top of the tripod (14), a synchronous sliding groove (20) is formed between the outer side of the rotating ring (19) and the rotating ring (19), the top of carousel (7) is round platform structure, just the inclination in carousel (7) outside is less than the inclination of feeder hopper (5) inboard.
  3. 3. The lead bismuth alloy casting device according to claim 2, wherein the slag removing mechanism further comprises a mounting cylinder (21) sleeved on the outer side of the spiral scraping strip (8), the pull rod (10) is of a hollow structure, the pull rod (10) is sleeved on the outer side of the mounting cylinder (21), a feeding box (22) is mounted at the top end of the mounting cylinder (21), the top end of the spiral scraping strip (8) extends to the inner side of the feeding box (22), a supporting arm (23) is mounted between the feeding box (22) and the top of the tripod (14), a second motor (24) is mounted at the top of the feeding box (22), the output end of the second motor (24) is fixedly connected with the top end of the spiral scraping strip (8), a discharging pipe (25) is mounted at the bottom of the feeding box (22), a plurality of rotating plates (26) are fixedly mounted at the top end of the spiral scraping strip (8), a scraping plate (27) is mounted at the bottom of the rotating plate (26), and the scraping plate (27) is in contact with the inner side of the feeding box (22).
  4. 4. The lead bismuth alloy casting device according to claim 3, wherein the demoulding mechanism further comprises a positioning frame (28) arranged on the inner side of the device frame (1), a first screw (29) is rotatably arranged on the inner side of the positioning frame (28), a third motor (30) is arranged on the inner side of the device frame (1), the output end of the third motor (30) is fixedly connected with the bottom end of the first screw (29), three fixing plates (31) are arranged on the outer side of the upper mould (4), L-shaped supporting rods (32) penetrating through the top of the device frame (1) in a sliding manner are arranged at the bottom of the fixing plates (31), a first moving block (33) is arranged between the three L-shaped supporting rods (32), the first moving block (29) is in threaded fit on the outer side of the first screw (29), a second screw (34) is fixedly arranged on the top end of the first screw (29), the top end of the second screw (34) is rotatably arranged on the bottom of the fixing plate (2), annular grooves (35) are formed in the bottom of the lower mould (3) in a sliding manner, the annular grooves (35) are formed in the bottom of the lower mould (3) and the annular grooves (35) are symmetrically arranged, and a second moving block (36) is arranged among the three push rods (35), the second moving block (36) is assembled on the outer side of the second screw rod (34) in a threaded mode, and the screw pitch of the first screw rod (29) is larger than that of the second screw rod (34).
  5. 5. The lead bismuth alloy casting device according to claim 2, wherein a striker plate (37) is arranged between the inner side of the casting hopper (6) and the outer side of the tripod (14), and the striker plate (37) is of an arc-shaped structure.
  6. 6. The lead bismuth alloy casting device as claimed in claim 2, wherein a sleeve frame (38) is arranged at the bottom of the annular frame (12), the sleeve frame (38) is arranged at the top of the tripod (14), and the sleeve frame (38) is sleeved outside the pull rod (10).
  7. 7. A lead bismuth alloy casting apparatus as claimed in claim 3, wherein a limiting cylinder (39) is mounted at the bottom of the feed box (22), and the limiting cylinder (39) is located right above the pull rod (10).
  8. 8. A lead bismuth alloy casting device as claimed in claim 3, wherein the bottom of the feeding box (22) is in a hollow round platform structure, and the outer side of the scraping plate (27) is in contact with the outer side of the spiral scraping strip (8).
  9. 9. The device for casting the lead-bismuth alloy according to claim 4, wherein the bottom end of the push rod (35) extends to the lower part of the second moving block (36), and an inserting cavity for limiting and inserting the push rod (35) is formed in the top of the positioning frame (28).
  10. 10. A lead bismuth alloy casting method using a lead bismuth alloy casting apparatus as claimed in any one of claims 1 to 9, characterized by comprising the steps of: S1, in a material injection stage, pouring a hot-melt metal raw material between a baffle plate (37) and a casting hopper (6), starting a first motor (19), enabling a swivel (17) to drive a pull rod (10) to rotate, and enabling the hot-melt metal raw material to be uniformly distributed between an upper die (4) and a lower die (3) by utilizing the centrifugal force of rotation of a turntable (7); S2, in a slag removal stage, starting two electric telescopic rods (15) and a second motor (24), enabling an annular frame (12) to pull a pull rod (10) to move upwards, enabling a sealing block (16) at the bottom of a rotary table (7) to seal a feed hopper (5), enabling the second motor (24) to scrape scum on the liquid level of a hot-melt metal raw material through a spiral scraping bar (8), conveying and discharging, and enabling raw materials in a lower die (3) and an upper die (4) to be cooled and molded; s3, in the demolding stage, a third motor (30) is started, so that the first screw (29) pushes the upper die (4) to be far away from the finished product and the lower die (3) through three L-shaped supporting rods (32) by a first moving block (33); and S4, in the pushing stage, the first screw (29) drives the second screw (34) to rotate, so that the second moving block (36) pushes the push ring (9) to move upwards through the push rod (35), the finished product is pushed out from the lower die (3), and the finished product is taken out.

Description

Lead bismuth alloy casting device and method Technical Field The invention relates to the field of metal casting processing equipment, in particular to a lead-bismuth alloy casting device and method. Background The lead-bismuth alloy is an alloy composed of metallic lead and bismuth, and the molten lead-bismuth alloy has excellent fluidity and small shrinkage, is very suitable for precision casting, can perfectly fill the microstructure of a die, and can manufacture parts with complex shapes and precise dimensions without subsequent large-scale machining, and is commonly used for manufacturing printing type dies, low-melting-point dies, balancing weights and nuclear reactor parts with complex shapes. When carrying out casting processing to the plumbum bismuth alloy, need earlier with pouring nozzle alignment mould's pouring basin, pour into the mould die cavity with hot melt metal through the pouring nozzle in, in order to improve casting efficiency, current casting device can adopt a plurality of pouring nozzles to pour into hot melt metal raw materials, but get into the hot melt metal raw materials in the die cavity and can be columnar and fall in the bottom of die cavity, need rely on the mobility of hot melt metal raw materials to fill the inboard of die cavity, this can make the inboard corner of die cavity appear casting incomplete condition, be difficult to guarantee in the hot melt metal raw materials can even pouring into the die cavity. Disclosure of Invention The invention aims to provide a lead bismuth alloy casting device and a lead bismuth alloy casting method, which are used for solving the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: A lead-bismuth alloy casting device comprises a device frame and a fixed disc fixedly mounted on the top of the device frame, wherein a lower die is fixedly mounted on the top of the fixed disc, an upper die is arranged above the lower die, a casting hole is formed in the top of the upper die, a feed hopper is fixedly mounted on the inner side of the casting hole, a casting hopper is fixedly mounted on the top of the feed hopper, the feed hopper and the casting hopper are of hollow round platform structures, the lead-bismuth alloy casting device further comprises a material injection mechanism used for uniformly injecting hot-melt metal raw materials into cavities of the upper die and the lower die, the material injection mechanism is mounted on the inner side of the feed hopper, the material injection mechanism comprises a rotary table arranged on the inner side of the feed hopper, the rotary table can enable the hot-melt metal raw materials to be injected into the cavities in an umbrella shape, a slag removing mechanism used for cleaning the liquid level of the hot-melt metal raw materials, the slag removing mechanism comprises a cavity formed in the inner side of the rotary table, the inner side of the cavity is provided with a spiral strip, the liquid level of the cavity is provided with a stripping mechanism, the stripping mechanism can be separated from the top of the die, and the stripping mechanism can be mounted on the top of the die. Preferably, the material injecting mechanism further comprises a pull rod fixedly installed at the top of the turntable, a mounting ring is fixedly installed at one end of the pull rod away from the turntable, an annular frame is sleeved on the outer side of the mounting ring, pushing plates are fixedly installed on two sides of the annular frame, a tripod is fixedly installed at the top of the upper die, an electric telescopic rod is fixedly installed between the top of the tripod and the bottom of the pushing plates, a guide sliding hole for limiting sliding of the pull rod is formed in the top of the tripod, a sealing block is fixedly installed at the top of the turntable, a rotating ring is sleeved on the outer side of the pull rod, rotating rings are rotatably installed at the top of the tripod, sliding teeth which are distributed in a central symmetry mode are fixedly installed on the inner side of the rotating ring, a long groove for limiting sliding of the sliding teeth is formed in 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, and the top of the turntable is of a structure, and the inclined angle of the turntable is smaller than that of the turntable. Preferably, the slag removing mechanism further comprises a mounting cylinder sleeved on the outer side of the spiral scraping strip, the pull rod is of a hollow structure, the pull rod is sleeved on the outer side of the mounting cylinder, a feeding box is fixedly mounted on the top end of the mounting cylinder, the top end of the spiral scraping strip extends to the inner side of the feeding box, a supporting