Uniform pressure-bearing forming die for hot forming isostatic pressing graphite saggar

Abstract

The invention discloses a uniform pressure-bearing forming die for a hot-formed isostatic pressing graphite sagger, and relates to the technical field of isostatic pressing forming dies. According to the uniform pressure-bearing forming mold for the hot-formed isostatic pressing graphite saggar, through cooperation of the vertex angle plate and the sliding plate, in the process of air pressure increase and deformation expansion in the inner mold cover, the corner expansion direction of the inner mold cover is limited through sliding fit of the sliding plate and the fixing frame plate groove and cooperation of fixed connection of the vertex angle plate and the inner mold cover, and meanwhile the vertex angle plate extrudes the corners, so that the deformation of the inner mold cover is reduced; the compression molding effect of the corner position of the inner wall of the graphite brake bowl is guaranteed, forming position deviation caused by bending of the corner position inside the graphite brake bowl is prevented, meanwhile, in the sliding process of the sliding plate, compression elastic force annular deformation is achieved, elastic force is generated, and the elastic force is transmitted to the inner mold cover through the sliding plate and the vertex angle plate in the pressure relief demolding process; and the inner mold cover is pulled inwards at the corner position to reset and is separated from the graphite brake bowl, so that mold opening and separation of the mold are facilitated.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of isostatic pressing forming molds, in particular to a hot forming isostatic pressing graphite ladle uniform pressure forming mold. BACKGROUND

[0002] The hot forming isostatic pressing graphite ladle uniform pressure forming mold is a special mold suitable for the isostatic pressing hot forming process, and the core function is to make the graphite raw material be uniformly pressed under a high-temperature and high-pressure environment, so as to guarantee the key performances of the graphite ladle, such as the density and isotropy, and the mold is commonly applied to the scenes with high requirements for the quality of ladles, such as the purification of new energy battery materials. A straight step ceramic shell isostatic pressing forming mold with the publication number CN109435022B comprises an upper mold core, a lower mold core and a pull rod, the upper mold core is provided with a center hole in the center, the lower mold core is provided with a center positioning protrusion on the upper end, the center positioning protrusion is provided with a threaded hole, the lower end of the upper mold core is provided with a counterbore matched with the center positioning protrusion, the lower end is screwed into the threaded hole, the upper mold core is provided with a first annular groove beside the center hole, the first annular groove is provided with a first expansion ring, one side of the first expansion ring is in contact with the surface of the lower mold core, the lower end of the center positioning protrusion of the lower mold core is provided with a first step part, the lower side of the lower mold core is sequentially provided with a second step part, a third step part and a fourth step part, and the second step part and the third step part are provided with a second expansion ring. The upper mold and the lower mold are combined, which replaces the mode in the prior art that the outer circle of the green body of the porcelain shell is first machined, then the inner hole straight step is machined after secondary clamping, so that the quantitative filling can be realized, the work efficiency is improved, and the yield is ensured. However, when the graphite ladle container with a zigzag corner is made, the corner position deviates in the forming and pressing process due to the deviation of the expansion direction of the elastic mold, so that the corner position of the graphite ladle deviates after forming, and the temperature of the graphite is easily transferred to the outside after the graphite material is injected, so that the graphite is cooled and solidified, and the isostatic pressing forming cannot be completed. SUMMARY

[0003] To solve the above technical problems, the technical scheme is as follows: a hot forming isostatic pressing graphite ladle uniform pressure forming mold comprises: A fixed mold mechanism and a movable mold mechanism, the fixed mold mechanism is located outside the movable mold mechanism, and a forming cavity is formed between the fixed mold mechanism and the movable mold mechanism; A sealing mechanism, the sealing mechanism is installed outside the fixed mold mechanism and the movable mold mechanism, and a connecting plate is installed on the top of the movable mold mechanism; The movable die mechanism comprises a frame plate, a top plate is fixedly installed at the top of the frame plate, a fixed frame is fixedly installed at the bottom of the top plate, plate grooves are formed at the corners of the outer side of the fixed frame, sliding plates are slidingly installed at the plate grooves of the fixed frame, top corner plates are fixedly installed at one end of the sliding plates, and the top corner plates are matched with the sliding plates. In the process of increasing the internal pressure of the inner cover and causing the deformation and expansion, the sliding plates are slidingly matched with the plate grooves of the fixed frame, the top corner plates are fixedly connected with the inner cover, the expansion direction of the corners of the inner cover is limited, the top corner plates are pressed at the corners, the mold pressing forming effect of the inner wall corner position of the graphite brake pot is ensured, the forming position offset of the inner corner position of the graphite brake pot due to the tortuosity is prevented, the elastic ring is compressed during the sliding process of the sliding plate, the elastic force is generated, the elastic force is transmitted to the inner cover through the sliding plate and the top corner plate during the pressure relief and demolding, the inner cover is pulled inward at the corner position to reset, the adhesion with the graphite brake pot is broken, the mold opening and separation are facilitated, the top corner plates are located outside the fixed frame, the top of the top corner plate is attached to the bottom of the frame plate, the inner cover is fixedly installed outside the top corner plate, the inner cover is made of elastic material, the other end of the sliding plate is provided with a protruding block, the protruding block is located inside the fixed frame, and the elastic ring is clamped between the protruding block and the fixed frame.

[0004] Preferably, the bottom of the top plate is fixedly installed with an inner frame cover, the top of the inner frame cover is provided with a frame groove, the top of the inner frame cover is fixedly installed with a top pad ring, the inner frame cover is located inside the fixed frame, the center position of the top of the top plate is fixedly installed with a communication pipe, the bottom end of the communication pipe penetrates through the top plate and extends into the inner frame cover, the bottom of the outer side of the communication pipe is uniformly provided with a pipe groove, and the pipe groove of the communication pipe is fixedly installed with a flow guide pipe, the bottom end of the flow guide pipe penetrates through the inner frame cover and extends to the bottom thereof. When the high-temperature gas is introduced through the cooperation of the flow guide pipe and the communication pipe, the high-temperature air is uniformly diffused to the surrounding through the cooperation of the shunt of the flow guide pipe and the slot at the bottom end of the flow guide pipe, so that the formed graphite brake pot is prevented from being concave due to the impact of the gas flow at the discharge position. At the same time, the inner frame cover forms a heat insulation cavity inside, reduces the heat loss of the high-temperature gas, prevents the gas temperature from losing too fast, and prevents the graphite material from solidifying due to low temperature during slow pressurization, so that the forming process cannot be completed. The bottom end of the flow guide pipe is not in contact with the inner wall of the inner cover, and the bottom end of the flow guide pipe is provided with a slot.

[0005] Preferably, the die mechanism comprises a hollow seat, the top of the hollow seat is fixedly installed with an outer frame cover, the inner wall of the outer frame cover is fixedly installed with a rectangular groove plate, the top of the rectangular groove plate is flush with the top of the outer frame cover, and the top of the rectangular groove plate is attached to the bottom of the frame plate, the bottom of the rectangular groove plate is fixedly installed with an outer shape cover, both sides of the outer frame cover are fixedly installed with a material injection pipe, a double-shell structure is formed by cooperation of the outer frame cover and the outer shape cover, a heat insulation cavity is formed outside the forming cavity between the outer shape cover and the inner shape cover, and the graphite material is provided with heat preservation after being injected into the forming cavity, so that the graphite material is prevented from solidifying before being molded, one end of the material injection pipe penetrates through the outer frame cover and extends into the inner part of the outer shape cover, one side of the outer frame cover adjacent to the material injection pipe is fixedly installed with an air exhaust pipe, one end of the air exhaust pipe penetrates through the outer frame cover and extends into the inner part thereof, both sides of the outer shape cover are provided with air holes, the hole diameter of the air holes gradually decreases from outside to inside, the air holes on both sides of the outer shape cover provide a flow path for the air in the forming cavity, the air in the forming cavity is exhausted at the same time when the material is injected, a large amount of air is prevented from being mixed into the material, air bubbles and grooves are prevented from being generated after molding, and the molding quality is affected, meanwhile, the hole diameter of the air holes gradually increases from inside to outside, the hole diameter on the inside is smallest, and the graphite material is prevented from blocking the air holes after entering the air holes, a through groove is formed at the center position of the bottom of the outer shape cover, a limiting ring is fixedly installed at the through groove of the bottom of the outer shape cover, and a material ejecting assembly is fixedly installed on the inner wall of the hollow seat.

[0006] Preferably, the material ejecting assembly comprises a sliding rail and a hydraulic cylinder, the hydraulic cylinder and the bottom of the sliding rail are fixedly connected with the inner wall of the hollow seat, the hydraulic cylinder is symmetrically installed on both sides of the sliding rail, a bottom sliding block is slidingly installed on the top of the sliding rail, the bottom sliding block is symmetrically installed on the top of the sliding rail, the output end of the hydraulic cylinder is fixedly connected with the non-opposite surface of the bottom sliding block, the top of the bottom sliding block is inclined, a material ejecting plate is installed on the top of the bottom sliding block, the bottom of the material ejecting plate is a protruding inclined surface at the center position, the bottom of the material ejecting plate is matched with the top of the bottom sliding block, and the bottom of the material ejecting plate is symmetrically provided with a sliding groove, an inner sliding block is fixedly installed on the top of the bottom sliding block, the bottom sliding block is slidingly matched with the sliding groove of the material ejecting plate through the inner sliding block, the outer side of the material ejecting plate is an inclined surface that is inclined inward from top to bottom, the limiting ring and the outer cover ring are matched through the limiting ring, when the material ejecting plate is reset by the hydraulic cylinder, the material ejecting plate drives the outer cover ring to enter the through groove of the outer shape cover, so that the outer cover ring first contacts the limiting ring, and the outer cover ring is deformed with gradually increasing contact pressure, the gap between the material ejecting plate and the through groove of the outer shape cover is filled, the graphite material is prevented from entering the gap under the forming pressure when being injected, material sticking is prevented from occurring when being demolded, the separation of the material and the mold is affected, the bottom of the outer side of the material ejecting plate is fixedly installed with an outer cover ring, and the bottom of the outer cover ring is attached to the top of the limiting ring.

[0007] Preferably, the sealing mechanism comprises a fixed plate and a clamping groove frame, the bottom of the fixed plate is fixedly connected with the top of the frame plate, the inner wall of the clamping groove frame is fixedly connected with the top of the outer frame cover, the outer side of the clamping groove frame is provided with a ring clamping groove, the ring clamping groove of the clamping groove frame is fixedly installed with a sealing ring, the outer side of the sealing ring is an inclined surface inclined outward from top to bottom, and the outer side of the fixed plate is fixedly installed with a pressing frame, the bottom of the inner wall of the pressing frame is an inclined surface, and the inner wall of the pressing frame is attached to the outer side of the sealing ring.

[0008] The application provides a hot forming isostatic pressing graphite ladle uniform pressure forming die. (One), the hot forming isostatic pressing graphite ladle uniform pressure forming die, through the cooperation of the top corner plate and the sliding plate, in the process of increasing the internal pressure of the inner cover and expanding, through the sliding adaptation of the sliding plate and the fixed frame plate slot, cooperating with the fixed connection of the top corner plate and the inner cover, limiting the expansion direction of the corners of the inner cover, at the same time, the top corner plate is extruded at the corner, ensuring the mold pressing forming effect of the inner wall corner position of the graphite ladle, preventing the internal corner position of the graphite ladle from being offset due to the tortuosity, at the same time, in the sliding process of the sliding plate, the compression elastic ring is deformed, so that the elastic force is generated, when the pressure is released and demoulding, the elastic force is transmitted to the inner cover through the sliding plate and the top corner plate, and the inner cover is pulled inward at the corner position to reset and separate from the graphite ladle.

[0009] (Two), the hot forming isostatic pressing graphite ladle uniform pressure forming die, through the cooperation of the flow guide pipe and the communication pipe, when the high-temperature gas is introduced, through the cooperation of the flow guide pipe and the slot at the bottom end of the flow guide pipe, the high-temperature air is uniformly diffused to the surrounding from the bottom end of the flow guide pipe, preventing the gas flow from impacting a certain position at the discharge position when the gas introduction flow rate is too fast, causing the formed graphite ladle to be concave, at the same time, the inner frame cover forms a heat insulation cavity inside, reducing the heat loss of the high-temperature gas, preventing the gas temperature from losing too fast, in the process of slow pressurization, low temperature causes the graphite material to solidify and cannot complete the forming process.

[0010] (Three), the hot forming isostatic pressing graphite ladle uniform pressure forming die, through the cooperation of the outer frame cover and the outer cover, a double-shell structure is formed, a heat insulation cavity is formed outside the forming cavity between the outer cover and the inner cover, and heat preservation is provided for the graphite material after the graphite material is injected into the forming cavity, preventing the graphite material from solidifying before mold pressing.

[0011] (iv) The thermoforming isostatic graphite sagger uniformly bears pressure forming mold, and provides a flow path for air in the forming cavity through the air holes on both sides of the outer cover. At the same time as the material is injected, the air in the forming cavity is extracted to prevent a large amount of air from being mixed into the material, which would cause air bubbles and grooves after forming and affect the forming quality. At the same time, the diameter of the air holes gradually increases from the inside to the outside, so that the diameter of the inner side is the smallest, to prevent the graphite material from entering the air holes and blocking them.

[0012] (v) The thermoforming isostatic graphite sagger uniform pressure forming mold, through the cooperation of the limiting ring and the outer cover ring, when the hydraulic cylinder drives the top plate to reset, the top plate drives the outer cover ring into the through groove of the outer cover, so that the outer cover ring first contacts the limiting ring, and with the gradually increasing contact pressure, the outer cover ring changes shape, filling the gap between the top plate and the through groove of the outer cover, preventing the graphite material from entering the gap under the forming pressure when injected, which would cause material jamming during demolding and affect the separation of the material from the mold. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the fixed mold mechanism of the present invention; Figure 3 This is a sectional view of the fixed mold mechanism of the present invention; Figure 4 This is a cross-sectional view of the top material assembly of the present invention; Figure 5 This is a schematic diagram showing the positional structure of the moving mold mechanism and the sealing mechanism of the present invention; Figure 6 This is a schematic diagram of the moving mold mechanism of the present invention; Figure 7 This is a sectional view of the moving mold mechanism of the present invention; Figure 8 This is a bottom view of the structural cross-section of the moving mold mechanism of the present invention; Figure 9 This is a schematic diagram of the sealing mechanism of the present invention; Figure 10 This is a cross-sectional view of the sealing mechanism of the present invention.

[0014] In the diagram: 1. Fixed mold mechanism; 2. Moving mold mechanism; 3. Sealing mechanism; 4. Connecting plate; 11. Empty slot seat; 12. Outer frame cover; 13. Injection pipe; 14. Evacuation pipe; 15. Outer cover; 16. Rectangular groove plate; 17. Ejector assembly; 18. Limiting ring; 171. Ejector plate; 172. Inner slider; 173. Hydraulic cylinder; 174. Bottom slider; 175. Slide rail; 176. Outer cover ring; 201. Top plate; 202. Inner cover; 203. Frame plate; 204. Connecting pipe; 205. Fixed frame; 206. Guide pipe; 207. Top pad ring; 208. Inner frame cover; 209. Top corner plate; 210. Slide plate; 211. Elastic ring; 31. Fixed plate; 32. Pressing frame; 33. Slot frame; 34. Sealing ring. Detailed Implementation

[0015] 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.

[0016] For the first embodiment, please refer to... Figure 1 and Figures 5 to 8 The present invention provides a technical solution: A thermoforming isostatic pressing graphite sagger uniform pressure forming mold, comprising: Fixed mold mechanism 1 and moving mold mechanism 2, with fixed mold mechanism 1 located outside moving mold mechanism 2, and forming a molding cavity between fixed mold mechanism 1 and moving mold mechanism 2; The sealing mechanism 3 is installed on the outside of the fixed mold mechanism 1 and the moving mold mechanism 2. The top of the moving mold mechanism 2 is equipped with a connecting plate 4. The moving mold mechanism 2 includes a frame plate 203, a top plate 201 fixedly installed on the top of the frame plate 203, and a fixed frame 205 fixedly installed on the bottom of the top plate 201. Utilizing the elastic material properties of the inner mold cover 202, as the internal air pressure increases, the inner mold cover 202 deforms downwards as the pressure gradually increases. The inner mold cover 202 expands outwards, evenly compressing the graphite material in the cavity, causing the graphite material to gradually take shape under pressure. The outer corners of the fixed frame 205... Each frame 205 has a slot, and a sliding plate 210 is slidably installed in the slot of each frame 205. A top corner plate 209 is fixedly installed at one end of the sliding plate 210. The top corner plate 209 is located on the outside of the frame 205, and its top is in contact with the bottom of the frame 203. An inner molded cover 202 is fixedly installed on the outside of the top corner plate 209. The inner molded cover 202 is made of elastic material. During the deformation of the inner molded cover 202, the sliding plate 210 cooperates with the slot of the frame 205. By utilizing the sliding fit between the sliding plate 210 and the groove, the deformation and expansion direction of the inner cover 202 is restricted. During the expansion process, the fixed connection between the top corner plate 209 and the inner cover 202 allows the top corner plate 209 to move with the expansion and deformation of the inner cover 202. During the movement, the sliding plate 210 slides within the groove, restricting the movement direction of the top corner plate 209. Simultaneously, during the movement, the protrusion at the other end of the sliding plate 210 compresses the elastic ring 211, causing the elastic ring 211 to... 11. Deformation and compression generate elastic force. When depressurization occurs, the air pressure inside the inner cover 202 decreases. At this time, the elastic force generated by the elastic ring 211 drives the slide plate 210 to move and drives the inner cover 202 to contract through the top corner plate 209. At the corner, a pulling force separates the inner cover 202 from the graphite material. The other end of the slide plate 210 is provided with a protrusion. The protrusion is located inside the fixed frame 205, and the elastic ring 211 is engaged between the protrusion and the fixed frame 205.

[0017] An inner frame cover 208 is fixedly installed at the bottom of the top plate 201. A frame groove is formed at the top of the inner frame cover 208, and a top pad ring 207 is fixedly installed at the frame groove. The inner frame cover 208 is located inside the fixed frame 205. A connecting pipe 204 is fixedly installed at the center of the top of the top plate 201. The bottom end of the connecting pipe 204 penetrates the top plate 201 and extends into the interior of the inner frame cover 208. Pipe grooves are evenly formed at the bottom of the outer side of the connecting pipe 204. It is connected to the traction structure of the isostatic press via a connecting plate 4, allowing the isostatic press to drive the moving mold mechanism 2 and the fixed mold mechanism 1 to open and close the mold through the connecting plate 4. During mold closing and forming, the frame plate 208... 3. The bottom contacts the fixed mold mechanism 1 and the inner mold cover 202 cooperates with the fixed mold mechanism 1 to form a molding cavity. After the graphite material is injected into the cavity, the isostatic press introduces the high temperature gas into the guide pipe 206 through the connecting pipe 204. The high temperature gas is evenly dispersed from the bottom of the inner frame cover 208 into the space between the inner frame cover 208 and the inner mold cover 202 through the guide pipe 206. The guide pipe 206 is fixedly installed at the groove of the connecting pipe 204. The bottom end of the guide pipe 206 penetrates the inner frame cover 208 and extends to its bottom. The bottom end of the guide pipe 206 does not contact the inner wall of the inner mold cover 202, and the bottom end of the guide pipe 206 is provided with a notch.

[0018] The second embodiment is based on the first embodiment; please refer to [link / reference]. Figures 2 to 4As shown, the fixed mold mechanism 1 includes a slot seat 11. An outer frame cover 12 is fixedly installed on the top of the slot seat 11. A rectangular groove plate 16 is fixedly installed on the top of the inner wall of the outer frame cover 12. The top of the rectangular groove plate 16 is flush with the top of the outer frame cover 12, and the top of the rectangular groove plate 16 is attached to the bottom of the frame plate 203. An outer cover 15 is fixedly installed on the bottom of the rectangular groove plate 16. During installation, the air extraction pipe is connected to the air extraction pipe 14, and the graphite material introduction pipe is connected to the injection pipe 13. During the injection of graphite material, the air in the molding cavity is extracted from the molding cavity through the air holes evenly opened on the outside of the outer cover 15. At the same time, the outer frame cover 12 and the outer cover 15 cooperate to form a double-layer shell structure on the outside of the molding cavity. A heat insulation and isolation space is formed between the outer frame cover 12 and the outer cover 15 to reduce the heat of the high-temperature graphite material. The outer frame cover 12 has injection pipes 13 fixedly installed on both sides. One end of the injection pipe 13 passes through the outer frame cover 12 and extends into the interior of the outer cover 15. An air extraction pipe 14 is fixedly installed on the outer side of the outer frame cover 12 adjacent to the injection pipe 13. One end of the air extraction pipe 14 passes through the outer frame cover 12 and extends into its interior. Air holes are opened on both sides of the outer cover 15, and the diameter of the air holes gradually decreases from the outside to the inside. After the graphite material is formed, when the mold is opened, the moving mold mechanism 2 disengages and pushes the formed graphite guillotine upward at the bottom of the forming cavity through the ejector assembly 17, so that the graphite guillotine and the outer cover 15 are separated and loosened. A through groove is opened at the center of the bottom of the outer cover 15. A limit ring 18 is fixedly installed at the through groove at the bottom of the outer cover 15. The ejector assembly 17 is fixedly installed on the inner wall of the slot seat 11.

[0019] The top material assembly 17 includes a slide rail 175 and a hydraulic cylinder 173. The bottoms of both the hydraulic cylinder 173 and the slide rail 175 are fixedly connected to the inner wall of the empty slot seat 11. The hydraulic cylinder 173 is symmetrically installed on both sides of the slide rail 175. Bottom sliders 174 are slidably installed on the top of the slide rail 175. The bottom sliders 174 are symmetrically installed on the top of the slide rail 175. The hydraulic cylinder 173 drives the bottom sliders 174 on both sides to slide on the top of the slide rail 175. During the sliding process, the inclined surface of the top of the bottom slider 174 is in contact with the bottom of the top material plate 171. During movement, the bottom slider 174 slides within the groove of the top plate 171, lifting the top plate 171. The output end of the hydraulic cylinder 173 is fixedly connected to the non-opposing surface of the bottom slider 174. The top of the bottom slider 174 is an inclined surface, and the top plate 171 is mounted on the top of the bottom slider 174. The bottom of the top plate 171 is an inclined surface with a central protrusion. The bottom of the top plate 171 is adapted to the top of the bottom slider 174, and grooves are symmetrically formed on the bottom of the top plate 171. An inner slider 172 is fixedly installed on the top of the 4. The bottom slider 174 slides and adapts to the groove of the top plate 171 through the inner slider 172. The outer side of the top plate 171 is an inclined surface that slopes inward from top to bottom. During the lifting process, the top of the top plate 171 contacts the bottom of the formed graphite guillotine, lifting the graphite guillotine for demolding. When the mold is closed, the hydraulic cylinder 173 drives the bottom slider 174 to move away from each other, and the sliding adaptation between the inner slider 172 and the groove of the top plate 171 drives the top plate 174 to move away from the bottom slider 174. 1. Moving downwards, during the downward movement, the top plate 171 enters the through groove at the bottom of the outer cover 15 and contacts the through groove of the outer cover 15 through the outer cover ring 176. After the top of the limiting ring 18 contacts the bottom of the outer cover ring 176, the outer cover ring 176 is squeezed. The deformation of the outer cover ring 176 seals the gap between the top plate 171 and the outer cover 15. The outer cover ring 176 is fixedly installed on the bottom of the outer side of the top plate 171, and the bottom of the outer cover ring 176 is in contact with the top of the limiting ring 18.

[0020] The third embodiment is based on embodiments one and two; please refer to [link / reference]. Figures 9 to 10As shown, the sealing mechanism 3 includes a fixed plate 31 and a slot frame 33. The bottom of the fixed plate 31 is fixedly connected to the top of the frame plate 203, and is connected to the moving mold mechanism 2 through the fixed plate 31. The slot frame 33 is fixedly connected to the fixed mold mechanism 1. During the mold closing process, the fixed mold mechanism 1 and the moving mold mechanism 2 are gradually brought closer together by the drive of the isostatic press. The inner wall of the slot frame 33 is fixedly connected to the top of the outer side of the outer frame cover 12, and an annular groove is opened on the outer side of the slot frame 33. A sealing ring 34 is fixedly installed at the annular groove of the slot frame 33 to seal. The outer side of ring 34 is an inclined surface that slopes outward from top to bottom. During the approach process, the pressing frame 32, which is fixedly connected to the outer side of the fixing plate 31, approaches the sealing ring 34, so that the inclined surface of the inner wall of the pressing frame 32 gradually fits with the inclined surface of the outer side of the sealing ring 34. Under the mold closing pressure, the pressing frame 32 squeezes the sealing ring 34, forming a seal at the gap between the fixed mold mechanism 1 and the moving mold mechanism 2. The pressing frame 32 is fixedly installed on the outer side of the fixing plate 31. The bottom of the inner wall of the pressing frame 32 is an inclined surface, and the inner wall of the pressing frame 32 fits with the outer side of the sealing ring 34.

[0021] In use, the mold is loaded into the isostatic press, and the test pressure medium pipeline is connected to the mold. The position between the fixed mold mechanism 1 and the moving mold mechanism 2 is controlled by the isostatic press to realize the mold opening and closing. In use, the mold is closed, and the fixed mold mechanism 1 and the moving mold mechanism 2 are sealed by the sealing mechanism 3, so that a molding cavity is formed between the fixed mold mechanism 1 and the moving mold mechanism 2. The air in the molding cavity is extracted, and then the heated graphite material is introduced into the molding cavity. Then, high temperature gas is introduced into the moving mold mechanism 2 to increase the air pressure inside the moving mold mechanism 2. At the same time, the elasticity of the molding part inside the moving mold mechanism 2 is utilized to make the internal air pressure extremely high. The molding part is deformed under pressure, and pressure is evenly applied to the graphite material in the graphite molding cavity to form the graphite material.

[0022] In the moving mold mechanism 2, it is connected to the traction structure of the isostatic press via the connecting plate 4. The isostatic press, through the connecting plate 4, drives the moving mold mechanism 2 and the fixed mold mechanism 1 to open and close the mold. During mold closing and forming, the bottom of the frame plate 203 contacts the fixed mold mechanism 1, and the inner mold cover 202 cooperates with the fixed mold mechanism 1 to form a forming cavity. After the graphite material is injected into the cavity, the isostatic press introduces high-temperature gas into the guide pipe 206 through the connecting pipe 204. The high-temperature gas is then evenly dispersed from the bottom of the inner frame cover 208 into the space between the inner frame cover 208 and the inner mold cover 202 through the guide pipe 206. Utilizing the elastic material characteristics of the inner mold cover 202, as the internal air pressure increases, the inner mold cover 202 deforms as the pressure gradually increases. The inner mold cover 202 expands outward, evenly compressing the graphite material in the cavity, causing the graphite material to gradually take shape under pressure. During the deformation of the inner cover 202, the sliding plate 210 cooperates with the groove of the fixed frame 205, and the sliding fit between the sliding plate 210 and the groove restricts the expansion direction of the inner cover 202. During the expansion, the fixed connection between the top corner plate 209 and the inner cover 202 allows the top corner plate 209 to move with the expansion deformation of the inner cover 202. During the movement, the sliding plate 210 slides in the groove, restricting the movement direction of the top corner plate 209. At the same time, during the movement, the protrusion at the other end of the sliding plate 210 compresses the elastic ring 211, causing the elastic ring 211 to deform and compress, generating elastic force. When the pressure is released, the air pressure inside the inner cover 202 decreases. At this time, the elastic force generated by the elastic ring 211 drives the sliding plate 210 to move, and drives the inner cover 202 to contract through the top corner plate 209. At the corners, a pulling force separates the inner cover 202 from the graphite material.

[0023] In the sealing mechanism 3, the fixed plate 31 is connected to the moving mold mechanism 2, and the slot frame 33 is fixedly connected to the fixed mold mechanism 1. During the mold closing process, the fixed mold mechanism 1 and the moving mold mechanism 2 are gradually brought closer by the drive of the isostatic press. During the approach process, the pressing frame 32 fixedly connected to the outside of the fixed plate 31 is brought closer to the sealing ring 34, so that the inclined surface of the inner wall of the pressing frame 32 gradually fits with the inclined surface of the outer side of the sealing ring 34. Under the mold closing pressure, the pressing frame 32 squeezes the sealing ring 34, forming a seal at the gap between the fixed mold mechanism 1 and the moving mold mechanism 2.

[0024] In the fixed mold mechanism 1, during installation, the air extraction pipe is connected to the air extraction pipe 14, and the graphite material introduction pipe is connected to the injection pipe 13. During the injection of graphite material, the air in the molding cavity is extracted from the molding cavity through the air holes evenly opened on the outside of the outer cover 15. At the same time, the outer frame cover 12 and the outer cover 15 cooperate to form a double shell structure on the outside of the molding cavity. A heat insulation and isolation space is formed between the outer frame cover 12 and the outer cover 15 to reduce the heat loss of the high-temperature graphite material. At the same time, after the graphite material is formed, when the mold is opened, the moving mold mechanism 2 disengages and pushes the formed graphite guillotine upward at the bottom of the molding cavity through the ejector assembly 17, so that the graphite guillotine and the outer cover 15 are separated and loosened.

[0025] In the ejector assembly 17, the hydraulic cylinder 173 drives the bottom sliders 174 on both sides to slide on the top of the slide rail 175. During the sliding process, the top inclined surface of the bottom slider 174 matches the bottom inclined surface of the ejector plate 171. During the movement, the bottom slider 174 slides in the groove of the ejector plate 171, lifting the ejector plate 171. At the same time, during the lifting process, the top of the ejector plate 171 contacts the bottom of the formed graphite guillotine, lifting the graphite guillotine for demolding. When the mold is closed, the hydraulic cylinder 173... 73 drives the bottom slider 174 to move away from each other, and uses the sliding fit between the inner slider 172 and the top plate 171 groove to drive the top plate 171 to move down. During the downward movement, the top plate 171 enters the through groove at the bottom of the outer cover 15, and contacts the through groove position of the outer cover 15 through the outer cover ring 176. After the top of the limiting ring 18 contacts the bottom of the outer cover ring 176, the outer cover ring 176 is squeezed. The deformation of the outer cover ring 176 seals the gap between the top plate 171 and the outer cover 15.

[0026] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] 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 thermoforming isostatic pressing graphite sagger uniform pressure forming mold, characterized in that, include: A fixed mold mechanism (1) and a moving mold mechanism (2) are provided, wherein the fixed mold mechanism (1) is located outside the moving mold mechanism (2), and a molding cavity is formed between the fixed mold mechanism (1) and the moving mold mechanism (2); A sealing mechanism (3) is installed on the outside of the fixed mold mechanism (1) and the moving mold mechanism (2), and a connecting plate (4) is installed on the top of the moving mold mechanism (2). The moving mold mechanism (2) includes a frame plate (203), a top plate (201) is fixedly installed on the top of the frame plate (203), a fixed frame (205) is fixedly installed on the bottom of the top plate (201), and plate grooves are provided at the outer corners of the fixed frame (205). Slide plates (210) are slidably installed in the plate grooves of the fixed frame (205), and a top corner plate (209) is fixedly installed at one end of the slide plate (210). The top corner plate (209) is located on the outside of the fixed frame (205). The top of the top corner plate (209) is attached to the bottom of the frame plate (203). An inner cover (202) is fixedly installed on the outside of the top corner plate (209). The inner cover (202) is made of elastic material. A protrusion is provided at the other end of the slide plate (210). The protrusion is located on the inside of the fixed frame (205), and an elastic ring (211) is engaged between the protrusion and the fixed frame (205).

2. The thermoforming isostatic pressing graphite sagger uniform pressure forming mold according to claim 1, characterized in that: An inner frame cover (208) is fixedly installed at the bottom of the top plate (201). A frame groove is opened at the top of the inner frame cover (208), and a top pad ring (207) is fixedly installed at the frame groove of the inner frame cover (208). The inner frame cover (208) is located inside the fixed frame (205). A connecting pipe (204) is fixedly installed at the center of the top of the top plate (201). The bottom end of the connecting pipe (204) penetrates the top plate (201) and extends into the interior of the inner frame cover (208).

3. The thermoforming isostatic pressing graphite sagger uniform pressure forming mold according to claim 2, characterized in that: The bottom of the outer side of the connecting pipe (204) is uniformly provided with pipe grooves, and a guide pipe (206) is fixedly installed at each pipe groove of the connecting pipe (204). The bottom end of the guide pipe (206) penetrates the inner frame cover (208) and extends to its bottom. The bottom end of the guide pipe (206) does not contact the inner wall of the inner cover (202), and a notch is provided at the bottom end of the guide pipe (206).

4. The thermoforming isostatic pressing graphite sagger uniform pressure forming mold according to claim 1, characterized in that: The fixed mold mechanism (1) includes a slot seat (11). An outer frame cover (12) is fixedly installed on the top of the slot seat (11). A rectangular slot plate (16) is fixedly installed on the top of the inner wall of the outer frame cover (12). The top of the rectangular slot plate (16) is flush with the top of the outer frame cover (12), and the top of the rectangular slot plate (16) is in contact with the bottom of the frame plate (203). An outer cover (15) is fixedly installed on the bottom of the rectangular slot plate (16).

5. The thermoforming isostatic pressing graphite sagger uniform pressure forming mold according to claim 4, characterized in that: Both sides of the outer frame cover (12) are fixedly installed with injection pipes (13). One end of the injection pipe (13) passes through the outer frame cover (12) and extends into the interior of the outer cover (15). An air extraction pipe (14) is fixedly installed on the outer side of the outer frame cover (12) adjacent to the injection pipe (13). One end of the air extraction pipe (14) passes through the outer frame cover (12) and extends into its interior.

6. The thermoforming isostatic pressing graphite sagger uniform pressure forming mold according to claim 5, characterized in that: Air holes are provided on both sides of the outer cover (15), and the diameter of the air holes gradually decreases from the outside to the inside. A through groove is provided at the center of the bottom of the outer cover (15). A limit ring (18) is fixedly installed at the through groove at the bottom of the outer cover (15). A top material assembly (17) is fixedly installed on the inner wall of the empty slot seat (11).

7. The thermoforming isostatic pressing graphite sagger uniform pressure forming mold according to claim 6, characterized in that: The top material assembly (17) includes a slide rail (175) and a hydraulic cylinder (173). The bottom of the hydraulic cylinder (173) and the slide rail (175) are fixedly connected to the inner wall of the empty slot seat (11). The hydraulic cylinder (173) is symmetrically installed on both sides of the slide rail (175). A bottom slider (174) is slidably installed on the top of the slide rail (175). The bottom slider (174) is symmetrically installed on the top of the slide rail (175). The output end of the hydraulic cylinder (173) is fixedly connected to the non-opposing surface of the bottom slider (174). The top of the bottom slider (174) is an inclined surface, and a top material plate (171) is installed on the top of the bottom slider (174).

8. The thermoforming isostatic pressing graphite sagger uniform pressure forming mold according to claim 7, characterized in that: The bottom of the top plate (171) is a sloping surface with a central protrusion. The bottom of the top plate (171) is adapted to the top of the bottom slider (174). The bottom of the top plate (171) is symmetrically provided with grooves. The top of the bottom slider (174) is fixedly installed with an inner slider (172). The bottom slider (174) slides and adapts to the groove of the top plate (171) through the inner slider (172). The outer side of the top plate (171) is a sloping surface that slopes inward from top to bottom. The bottom of the outer side of the top plate (171) is fixedly installed with an outer cover ring (176). The bottom of the outer cover ring (176) is in contact with the top of the limiting ring (18).

9. The thermoforming isostatic pressing graphite sagger uniform pressure forming mold according to claim 8, characterized in that: The sealing mechanism (3) includes a fixing plate (31) and a slot frame (33). The bottom of the fixing plate (31) is fixedly connected to the top of the frame plate (203). The inner wall of the slot frame (33) is fixedly connected to the top of the outer side of the outer frame cover (12). A ring slot is provided on the outer side of the slot frame (33).

10. The thermoforming isostatic pressing graphite sagger uniform pressure forming mold according to claim 9, characterized in that: A sealing ring (34) is fixedly installed at the ring groove of the card slot frame (33). The outer side of the sealing ring (34) is an inclined surface that slopes outward from top to bottom. A pressing frame (32) is fixedly installed on the outer side of the fixing plate (31). The bottom of the inner wall of the pressing frame (32) is an inclined surface, and the inner wall of the pressing frame (32) is in contact with the outer side of the sealing ring (34).

Images