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CN-122008390-A - Compression molding equipment and compression molding method for crucible production

CN122008390ACN 122008390 ACN122008390 ACN 122008390ACN-122008390-A

Abstract

The invention belongs to the technical field of crucible molding, and in particular relates to a compression molding device and a compression molding method for crucible production, comprising a workbench, wherein a first bracket is arranged above the workbench, an upper mold molding device is arranged below the first bracket, a lower mold fixing device is arranged above the workbench, a lifting device is arranged below the workbench, rotating devices are arranged on two sides of the lifting device, a feeding device is arranged on the side surface of the workbench, compared with the prior art, the invention realizes bidirectional opposite pressing of powder in the inner cavity of the lower die, the molding mode ensures that the powder at the upper end and the lower end is stressed uniformly, effectively overcomes extremely high friction resistance of alumina powder, can greatly eliminate the risks of biscuit microcrack and edge chipping, and remarkably improves the yield of finished ceramic crucibles.

Inventors

  • CHEN GENG
  • LV TAO
  • SUN LONGXIANG
  • Xie Liangda

Assignees

  • 济南厚发芯智科技有限公司

Dates

Publication Date
20260512
Application Date
20260410

Claims (10)

  1. 1. The utility model provides a compression molding equipment of crucible production, includes workstation (1), its characterized in that, support one (3) is installed to the top of workstation (1), mould pressing device is installed to the below of support one (3), the top of workstation (1) is provided with lower mould fixing device, elevating gear is installed to the below of workstation (1), rotary device is all installed to elevating gear's both sides, the side of workstation (1) still is provided with loading attachment, the top cooperation of workstation (1) has flitch (42).
  2. 2. The pressing and forming device for crucible production according to claim 1, wherein the upper molding device comprises a plurality of first air cylinders (4) and a plurality of second air cylinders (6), the first air cylinders (4) and the second air cylinders (6) are all arranged below the first bracket (3), the piston rod ends of the first air cylinders (4) are all detachably connected with an upper mold (5), and the piston rod ends of the second air cylinders (6) are all provided with a first absorption part (7); A plurality of first grooves are formed in the lower portion of the workbench (1), the first adsorption piece (7) is matched with the first grooves, and the upper die (5) is matched with the lower die fixing device.
  3. 3. The pressing and forming device for crucible production according to claim 2, wherein the lower die fixing device comprises a plurality of fixing driving mechanisms, a plurality of second grooves are formed in the upper portion of the workbench (1), first through holes are formed in two sides of the second grooves, the first through holes are slidably connected with moving shafts (38), first cavities are formed in positions, corresponding to the first through holes, of the workbench (1), the fixing driving mechanisms are installed in the first cavities, the fixing driving mechanisms are fixedly connected with the moving shafts (38), clamping pieces (32) are installed at the end portions, far away from the first cavities, of the moving shafts (38), the clamping pieces (32) in the second grooves are used for clamping lower dies (23), and the upper dies (5) are matched with the lower dies (23).
  4. 4. A press forming apparatus for crucible production according to claim 2 or 3, wherein the lifting device comprises a base (2), the base (2) is detachably connected to the ground, a plurality of lifting cylinders are installed in the base (2), suction members three (22) are installed at the piston rod ends of the lifting cylinders, and the suction members three (22) are matched with the grooves one.
  5. 5. The pressing and forming device for crucible production according to claim 4, wherein the rotating mechanism comprises a third cylinder (8) and a rotating driving member, the third cylinder (8) is mounted on the side surface of the base (2), a second bracket (9) is mounted at the end portion of a piston rod of the third cylinder (8), a first driving motor (10) is mounted above the second bracket (9), the rotating driving member is fixedly connected with the output end of the first driving motor (10), a connecting shaft (12) is mounted on the side surface, close to the workbench (1), of the rotating driving member, a second absorption member (11) is mounted on the side surface of the connecting shaft (12), a third groove is formed in the side surface, corresponding to the third cylinder (8), of the workbench (1), and the third groove is matched with the second absorption member (11).
  6. 6. The pressing and forming device for crucible production according to claim 5, wherein the rotary driving member comprises a first rotary shaft (27) and a disc (13), the first rotary shaft (27) is installed at the output end of the first drive motor (10), the disc (13) is installed at the side face of the connecting shaft (12), two third connecting members (29) are installed at the periphery of the first rotary shaft (27), a fourth groove is formed in the side face, close to the first rotary shaft (27), of the disc (13), and a fifth connecting member (30) is installed between the side face, close to the disc (13), of the third connecting members (29) and the bottom of the fourth groove; An annular groove is formed in the side face of the disc (13), an annular ring (25) is matched in the annular groove, a fourth connecting piece (31) is arranged on the side face of the annular ring (25), a fixing piece (28) is arranged on the side face of the fourth connecting piece (31) through a connecting cylinder (26), and the fixing piece (28) is arranged on the periphery of the first rotating shaft (27).
  7. 7. The pressing and forming device for crucible production according to claim 1, wherein the workbench (1) is provided with a rectangular groove, a plurality of absorbing parts IV are arranged in the rectangular groove, a blanking plate (42) is arranged above the workbench (1), blanking clamping parts I (43) are arranged at two ends below the blanking plate (42), a blanking clamping part II (44) is arranged below the blanking clamping parts I (43), the blanking clamping parts II (44) are matched with the absorbing parts IV, and the blanking plate (42) is matched with the lifting device.
  8. 8. A pressing forming apparatus for crucible production according to claim 3, wherein the fixed driving mechanism comprises two first connecting plates (33), the two first connecting plates (33) are both installed in the first cavity, a second rotating shaft (34) penetrates through the two first connecting plates (33), a moving block (37) is installed on the periphery of the second rotating shaft (34), a second connecting plate (36) is installed in the first cavity, a first sliding chute is formed above the second connecting plates (36), the moving block (37) is in sliding connection with the first sliding chute, a seventh air cylinder (35) is installed below the second connecting plates (36), the end portion of a piston rod of the seventh air cylinder (35) is hinged with the moving block (37), a fixed support (39) is installed above the second connecting plates (36), and the moving shaft (38) penetrates through the fixed support (39) to be hinged with the upper portion of the moving block (37).
  9. 9. The pressing and forming device for crucible production according to claim 6, wherein the cylinder six (21) is installed on both sides of the first driving motor (10), the second connecting pieces (24) are installed on the periphery of the first rotating shaft (27), fixing through holes are formed on the side surfaces of the second connecting pieces (24), and piston rods of the cylinder six (21) are matched with the fixing through holes.
  10. 10. A press molding method of crucible production, characterized in that press molding is performed by the press molding apparatus of crucible production according to claim 3, comprising the steps of: The method comprises the steps that firstly, a lower die (23) coated with a release agent is placed in a groove II, a clamping piece (32) is pushed by a fixed driving mechanism to fix the lower die (23), and a feeding device injects quantitative powder into the lower die (23); Step two, the cylinder one (4) pushes the upper die (5) downwards, and the lifting device pushes the workbench (1) and the lower die (23) upwards, so that the upper die (5) and the lower die (23) are matched with each other in a pressing mode to obtain a crucible blank; The upper die (5) is separated from the lower die (23), a blanking plate (42) is placed and matched above the lower die (23), a rotating device is matched and fixed with the workbench (1), and a lifting device is separated from the workbench (1); And fourthly, the rotating device drives the workbench (1) and the blanking plate (42) to rotate 180 degrees, the first adsorption piece (7) is pushed by the second air cylinder (6) to be adsorbed and fixed with the workbench (1), the rotating device is separated from the workbench (1), the lifting device is matched with the blanking plate (42), the blanking plate (42) is separated from the workbench (1), the workbench (1) and the lower die (23) are driven by the second air cylinder (6) to move upwards, and a formed crucible blank body is obtained on the blanking plate (42).

Description

Compression molding equipment and compression molding method for crucible production Technical Field The invention belongs to the technical field of crucible forming, and particularly relates to a compression forming device and a compression forming method for crucible production. Background At present, a crucible is a core basic container for smelting, calcining and crystal growth in industries such as metallurgy, chemical industry, photovoltaic and semiconductor, and in recent years, with the rapid development of new material industry, the market demand of high-performance ceramic crucibles represented by alumina is increasingly large due to the excellent high temperature resistance, corrosion resistance and high strength characteristics. In the industrial production of alumina crucibles, dry powder compression molding is the most dominant process because of its short production cycle and easy mass production, however, alumina powder itself has physical characteristics of large hardness, high friction coefficient, and poor self-plasticity. Most of the existing pressing equipment adopts unidirectional pressing, such as downward unidirectional pressing by an upper die, but in the pressing process of alumina powder, because of huge friction resistance between powder particles and between powder and the side wall of a die, the pressure is exponentially attenuated in the transmission process, so that a serious density gradient is generated in the formed alumina biscuit, namely, the pressed alumina biscuit is compact near a pressing end and loose far from the pressing end, and the uneven upper and lower densities can cause inconsistent shrinkage of a crucible in the subsequent high-temperature sintering process, thereby causing deformation and cracking of the crucible and seriously affecting the mechanical property and service life of a finished product. And the structure of the alumina biscuit after dry pressing is extremely fragile, as the hardness of alumina powder is high, the adhesion between the alumina powder and the inner wall of a die is extremely tight after compaction, the die drawing resistance is huge, the traditional equipment usually adopts a demoulding mode that a bottom ejector rod is forcedly ejected or a mechanical arm is directly clamped for drawing, the rigidity and local stress are extremely easy to cause serious stress concentration in the fragile biscuit, so that the biscuit is subjected to microcracking which is difficult to be perceived by naked eyes, or friction blocks and even direct fragmentation are generated at the edge of the die, and the rejection rate of a demoulding link is high. Disclosure of Invention The invention aims at the problems and provides a compression molding device and a compression molding method for crucible production. In order to achieve the purpose, the technical scheme includes that the pressing forming equipment for crucible production comprises a workbench, a first bracket is arranged above the workbench, an upper die pressing device is arranged below the first bracket, a lower die fixing device is arranged above the workbench, lifting devices are arranged below the workbench, rotating devices are arranged on two sides of the lifting devices, a feeding device is further arranged on the side face of the workbench, and a blanking plate is matched above the workbench. Preferably, the upper die pressing device comprises a plurality of first air cylinders and a plurality of second air cylinders, wherein the first air cylinders and the second air cylinders are arranged below the first bracket, the end parts of piston rods of the first air cylinders are detachably connected with an upper die, the end parts of piston rods of the second air cylinders are provided with first absorption parts, the lower part of the workbench is provided with a plurality of first grooves, the first absorption parts are matched with the first grooves, and the upper die is matched with the lower die fixing device. Preferably, the lower die fixing device comprises a plurality of fixing driving mechanisms, a plurality of second grooves are formed in the upper portion of the workbench, first through holes are formed in two sides of the second grooves, a movable shaft is connected in a sliding mode in the first through holes, a first cavity is formed in the position, corresponding to the first through holes, of the workbench, the fixing driving mechanisms are installed in the first cavity, the fixing driving mechanisms are fixedly connected with the movable shaft, clamping pieces are installed at the end portions, far away from the first cavity, of the movable shaft, the clamping pieces in the second grooves are used for clamping the lower die, and the upper die and the lower die are matched. Preferably, the lifting device comprises a base, the base is detachably connected to the ground, a plurality of lifting cylinders are installed in the base, absorbing members III are installed at the