Hot extrusion forming hydraulic machine for graphite heater and extrusion method

Abstract

The invention discloses a hot extrusion forming hydraulic machine for a graphite heater and an extrusion method, and relates to the technical field of hot press forming, the hot extrusion forming hydraulic machine comprises a forming module, the forming module is used for containing graphite powder during pressing, a machine base is fixedly installed at the bottom of the forming module, and a control cabinet is fixedly installed on the outer side of the machine base; a hydraulic cylinder is fixedly mounted in the middle of the top of the forming module; and the hot pressing assembly is used for compression molding of the graphite powder. According to the hot extrusion forming hydraulic machine for the graphite heater and the extrusion method, the motor is started by a worker, so that the output end of the motor drives the rotating shaft to rotate in the feeding cavity, and at the moment, crushing blades mounted in the stirring pieces crush and stir agglomerated graphite powder; the graphite powder accumulated at the bottom of the feeding cavity is rolled through the rolling arc plate arranged on the side edge of the material stirring piece, so that graphite powder particles are finer and smoother, the mold space can be more tightly filled with the fine and uniform particles, and the porosity during mold filling before hot pressing is reduced.

Description

Technical Field

[0001] This invention relates to the field of hot pressing technology, specifically to a hot extrusion forming hydraulic press and extrusion method for graphite heaters. Background Art

[0002] Due to their excellent properties, graphite and carbon products are increasingly widely used, with a surge in demand in fields such as new energy, semiconductors, and photovoltaics. For example, the photovoltaic industry requires graphite heaters for producing monocrystalline and polycrystalline silicon crystal pulling furnaces, while semiconductor equipment manufacturing requires components such as graphite substrates and heaters. These demands place higher requirements on the precision, density, and other properties of graphite products, prompting the continuous development of related molding equipment.

[0003] Currently, traditional graphite processing and molding methods have many drawbacks. On the one hand, if the graphite powder particles are too large or agglomerated during pressing, the additives may only adhere to the particle surface or concentrate in the gaps, resulting in uneven distribution of material properties after hot pressing. On the other hand, uneven heating during hot pressing of graphite powder can cause a large temperature difference around the graphite powder, which may lead to local overheating or insufficient curing, and consequently cause stratification due to differences in material properties. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a hot extrusion molding hydraulic press and extrusion method for graphite heaters, comprising: a molding module, which is used to hold graphite powder during pressing, a base is fixedly installed at the bottom of the molding module, a control cabinet is fixedly installed on the outside of the base, and a hydraulic cylinder is fixedly installed at the middle of the top of the molding module. A hot pressing assembly for pressing graphite powder into shape is fixedly installed at the actuating end of a hydraulic cylinder. The hot pressing assembly is installed inside a molding module and is mounted on the surface of the molding module via a hydraulic cylinder drive. A feeding assembly is used for pretreatment before graphite powder is pressed. A motor is fixedly installed on the outer surface of the feeding assembly, and the feeding assembly is slidably installed inside the forming module.

[0005] Preferably, the molding module includes a molding platform. Positioning grooves are formed at the corners of the outer surface of the molding platform. Support rods are fixedly installed inside each positioning groove. A top plate is fixedly installed on the top of each support rod. A protective plate is fixedly installed between the top plate and the outer surface of the molding platform. A molding groove is fixedly installed in the middle of the top of the molding platform. A pressure plate is installed on the outer side of the molding groove, and a guide groove is formed inside the pressure plate. The operator fills the molding groove with pulverized graphite powder. Then, the operator activates the hydraulic cylinder, causing the actuator to drive the hot-pressing guide plate to slide downwards on the support rods. The molding groove is annular in shape and wedges with the clamping ring at the bottom of the hot-pressing guide plate. The hot-pressing guide plate drives the clamping ring downwards, causing the graphite powder between the molding groove and the clamping ring to be extruded and molded.

[0006] Preferably, the forming table is fixedly installed on the top of the machine base, the forming table is adapted to the hot pressing assembly, and the hot pressing assembly is movably installed on the surface of the support rod.

[0007] Preferably, the hot pressing assembly includes a collar, a hydraulic rod is fixedly installed inside the collar, a hot pressing guide plate is fixedly installed at the bottom of the hydraulic rod, a uniform heat-conducting element is fixedly installed at the bottom of the hot pressing guide plate, through slots are formed at the corners of the outer surface of the hot pressing guide plate, an installation ring is fixedly installed at the top of the hot pressing guide plate near the through slot, a clamping ring is fixedly installed at the middle of the bottom of the hot pressing guide plate, and the outer side of the clamping ring is installed on the conduction plate. When the operator starts the hydraulic cylinder, the actuator of the hydraulic cylinder drives the hot pressing guide plate to slide on the support rod. When the hot pressing guide plate is started, the uniform heat-conducting element inside the hot pressing guide plate is powered on and heats the hot pressing guide plate. The hot pressing guide plate transfers heat to the conduction plate. When the hot pressing guide plate descends and presses, the conduction plate adheres to the top of the pressure plate and evenly transfers heat to the forming table, making the heating of the graphite powder more uniform during hot pressing and avoiding large temperature differences around the graphite powder during hot pressing, which may lead to local overheating or insufficient curing, and consequently cause material property differences and delamination.

[0008] Preferably, the collar is fixedly installed on the actuating end of the hydraulic cylinder, the hot pressing guide plate is driven and installed on the outer surface of the support rod through the actuating end of the hydraulic cylinder, the hot pressing guide plate is extruded and adapted to the forming table, the clamping ring is snapped and adapted to the forming groove, and four sets of uniform heat-conducting elements are provided, which are evenly arranged inside the hot pressing guide plate.

[0009] Preferably, the uniform heat-conducting component includes a heating coil. A sleeve is fitted over the outer surface of the heating coil. Several sleeves are provided, and connecting pipes are symmetrically installed on both sides of the outer surface of each sleeve. A copper tube is fixedly installed on the outer surface of each connecting pipe, and a connecting ring is fixedly installed on the outer surface of each copper tube. A connecting shell is fixedly installed between the opposite faces of the connecting rings. An inlet pipe and a drain pipe are fixedly installed on the outer surface of each connecting shell. When the heating coil is powered on, it heats the hot-pressing guide plate. The connecting pipes on both sides of the heating coil are symmetrically distributed with a convex center. The connecting pipes are connected to the bent copper tubes. Through the uniform and dense arrangement of multiple sets of copper tubes, the hot-pressing guide plate achieves uniform heat conduction during heating.

[0010] Preferably, both the drain pipe and the inlet pipe extend through the hot-pressing guide plate to its outer side. The connecting pipes are symmetrically distributed with a central bulge. The copper pipes are evenly arranged on the surface of the connecting shell through the connecting pipes. After the graphite powder is hot-pressed, the operator injects cooling liquid into the inlet pipe. The connecting shell is configured with two cavities, which are respectively connected to the inlet pipe and the drain pipe. The cooling liquid flows along the inlet pipe through the copper pipe, the connecting pipe, and the connecting ring, and then flows into the connecting pipe on the other side of the connecting ring. After flowing around the heating coil, the cooling liquid is discharged into the drain pipe on the other side. The cooling liquid cools and dissipates heat from the copper pipe and the heating coil. At the same time, the cooling allows the graphite powder to gradually solidify after hot pressing. Multiple separate flow channels can accelerate the heat dissipation efficiency of the pipeline and avoid defects in the graphite heater due to a sudden drop in temperature.

[0011] Preferably, the material guiding assembly includes a base plate, a slide rail fixedly installed at the bottom of the base plate, the slide rail being slidably installed inside the guide groove, an inclined plate fixedly installed at the top of the base plate, guide plates fixedly installed on both sides of the outer surface of the inclined plate, a feeding chamber fixedly installed on the outer surface of the guide plate, a material guide opening at the top of the feeding chamber, and a crushing component rotatably installed inside the feeding chamber, the crushing component being fixedly connected to the output end of the motor. Before hot pressing, the operator adjusts the position of the slide rail in the guide groove so that the opening of the guide plate aligns with the forming groove. Then, the operator feeds the graphite powder into the feeding chamber and starts the motor, causing the output of the motor to drive the crushing component to rotate in the feeding chamber. When the graphite powder needs to be compounded with other additives such as resin, metal powder, and ceramic powder, the crushing process breaks up the agglomeration of graphite particles, making it easier for the additives to disperse in the graphite powder. After the crushing component crushes and agitates larger or clumps of graphite powder, the graphite powder slides onto the inclined plate as the crushing component moves. The graphite powder on the inclined plate is guided by the guide plate to fill the forming groove. After filling, the operator moves the slide rail out of the guide groove to prevent the inclined plate from affecting the movement of the hot pressing components during hot pressing.

[0012] Preferably, the crushing component includes a rotating shaft, on the outer surface of which a feeding blade is rotatably mounted. A crushing arc plate is fixedly mounted on the surface of the feeding blade. Mounting rods are fixedly mounted on both sides inside the feeding blade, and crushing blades are fixedly mounted on the surface of the mounting rods. Several crushing blades are provided, and these blades are rotatably mounted inside the feeding chamber via the rotating shaft. When the operator starts the motor, the motor's output drives the rotating shaft to rotate within the feeding chamber. At this time, the crushing blades mounted inside the feeding blade crush and agitate the agglomerated graphite powder, and the crushing arc plate on the side of the feeding blade crushes the graphite powder accumulated at the bottom of the feeding chamber, making the graphite powder particles finer. These fine and uniform particles can more tightly fill the mold space, reducing the porosity during pre-molding loading.

[0013] Preferably, a hot extrusion molding method for graphite heaters comprises the following steps: S1. Crushing and agitation treatment: Before hot pressing the graphite heater, the operator first starts the motor so that the output end of the motor drives the crushing parts to rotate in the feeding chamber. Then the graphite powder is put into the feeding chamber. At this time, the rotating crushing parts perform crushing pretreatment on the graphite powder, refine the larger or agglomerated particles in the graphite powder, thereby improving the powder flowability and filling properties. S2. Powder conveying: The operator adjusts the position of the guide rail in the guide groove so that the guide plate aligns with the forming groove. The pre-treated graphite powder is discharged from the feeding chamber onto the inclined plate and fills the forming groove along the inclined plate. After filling, the operator adjusts the position of the guide rail so that the guide rail is pulled out from the guide groove. S3. Hot pressing: After the graphite powder is filled into the forming groove, the operator starts the hydraulic cylinder, which drives the hot pressing guide plate to slide down on the support rod. The uniform heat-conducting component in the hot pressing guide plate is heated after the power is turned on. The hot pressing guide plate moves down and the conduction plate presses onto the pressure plate. The clamping ring wedges with the forming groove so that the graphite powder is formed under force. S4. Cooling and Shaping: After the hot pressing guide plate heats the graphite powder through the uniform heat-conducting component, the operator injects cooling liquid into the uniform heat-conducting component. The cooling liquid flows through the uniform heat-conducting component to quickly reduce mold stability and keep the graphite material in a stable shape during the hardening process.

[0014] This invention provides a hot extrusion forming hydraulic press and extrusion method for graphite heaters. It has the following beneficial effects: I. The hot extrusion molding hydraulic press and extrusion method for graphite heaters involve workers filling the molding groove with crushed graphite powder, and then starting the hydraulic cylinder to drive the hot pressing guide plate to slide down on the support rod. The molding groove is set in an annular shape and is wedged and fixed with the clamping ring at the bottom of the hot pressing guide plate. The hot pressing guide plate drives the clamping ring to move down, so that the graphite powder between the molding groove and the clamping ring is extruded and molded.

[0015] II. The hot extrusion molding hydraulic press and extrusion method for graphite heaters involve an operator starting a hydraulic cylinder, causing the actuator of the hydraulic cylinder to slide on a support rod. When the hot extrusion guide plate is started, the uniform heat-conducting component inside the hot extrusion guide plate is powered on and heats the hot extrusion guide plate. The hot extrusion guide plate transfers heat to the conduction plate. When the hot extrusion guide plate descends and extrudes, the conduction plate adheres to the top of the pressure plate and evenly transfers heat to the forming table. This ensures that the graphite powder is heated more evenly during hot extrusion molding, avoiding large temperature differences around the graphite powder during hot extrusion processing, which may lead to local overheating or insufficient curing, and consequently cause material property differences and delamination.

[0016] III. The hot extrusion forming hydraulic press and extrusion method for graphite heaters, after the power is turned on by the electric heating coil, the hot pressing guide plate is heated. The connecting pipes on both sides of the electric heating coil are symmetrically distributed with a protruding middle. The connecting pipes are connected to the bent copper pipes. Through the uniform and dense arrangement of multiple sets of copper pipes, the hot pressing guide plate can achieve the effect of uniform heat conduction during heating.

[0017] IV. The hot extrusion molding hydraulic press and extrusion method for graphite heaters involve hot-pressing graphite powder, followed by the injection of cooling liquid into the inlet pipe. The connecting shell contains two cavities, which are connected to the inlet pipe and the drain pipe, respectively. The cooling liquid flows through the copper pipe, the connecting pipe, and the connecting ring, and then flows into the connecting pipe on the other side of the connecting ring. After flowing around the heating coil, the cooling liquid is discharged into the drain pipe on the other side. The cooling liquid cools the copper pipe and the heating coil, and the cooling also allows the graphite powder to gradually solidify after hot pressing. Multiple separate flow channels can accelerate the heat dissipation efficiency of the pipeline and avoid defects in the graphite heater caused by a sudden drop in temperature.

[0018] V. The hot extrusion molding hydraulic press and extrusion method for graphite heaters are described. When the operator starts the motor, the output end of the motor drives the rotating shaft to rotate in the feeding chamber. At this time, the crushing blade installed in the feed plate crushes and agitates the agglomerated graphite powder. The rolling arc plate set on the side of the feed plate crushes the graphite powder accumulated at the bottom of the feeding chamber, so that the graphite powder particles are finer. The fine and uniform particles can fill the mold space more tightly and reduce the porosity when the mold is installed before hot pressing. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the external structure of a hot extrusion molding hydraulic press for a graphite heater according to the present invention. Figure 2 This is a schematic diagram of the external structure of a hot extrusion forming hydraulic press for a graphite heater according to the present invention from another angle. Figure 3 This is a schematic diagram of the connection structure between the molding module and the hot pressing assembly of the present invention; Figure 4 This is a bottom view of the hot-pressing assembly of the present invention; Figure 5 This is a schematic diagram of the connection structure between the uniform heat-conducting component and the hot-pressing guide plate of the present invention; Figure 6 This is a schematic diagram of the structure of the uniform heat-conducting component of the present invention; Figure 7 This is a schematic diagram of the disassembled structure of the uniform heat-conducting component of the present invention; Figure 8 This is an enlarged structural diagram of the disassembled copper tube of the present invention; Figure 9 This is a schematic diagram of the connection structure between the molding module and the material guiding assembly of the present invention; Figure 10 This is a schematic diagram of the connection structure between the material guiding component and the guide channel of the present invention; Figure 11 This is a schematic diagram of the material guiding assembly of the present invention; Figure 12 This is a schematic cross-sectional view of the feeding chamber of the present invention; Figure 13 This is a schematic diagram of the structure of the pulverizer of the present invention; Figure 14 This is a schematic flowchart of a hot extrusion molding method for a graphite heater according to the present invention.

[0020] In the diagram: 1. Hydraulic cylinder; 2. Hot pressing assembly; 21. Hydraulic rod; 22. Hot pressing guide plate; 23. Collar; 24. Conductive plate; 25. Through groove; 26. Pressing ring; 27. Mounting ring; 28. Uniform heat conduction component; 281. Sleeve; 282. Heating coil; 283. Connecting pipe; 284. Copper pipe; 285. Connecting ring; 286. Connecting shell; 287. Water inlet pipe; 288. Drain pipe; 3. Material guiding assembly; 31. Feeding chamber; 32. 33. Slide rail; 33. Crushing component; 331. Rotating shaft; 332. Feeding disc; 333. Crushing arc plate; 334. Mounting rod; 335. Crushing blade; 34. Guide plate; 35. Inclined plate; 36. Base plate; 37. Feed inlet; 4. Machine base; 5. Control cabinet; 6. Motor; 7. Forming module; 71. Top plate; 72. Support rod; 73. Protective plate; 74. Forming table; 75. Forming groove; 76. Pressure plate; 77. Guide groove; 78. Positioning groove. Detailed Implementation

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] First embodiment, such as Figures 1 to 13 As shown, the present invention provides a technical solution: a hot extrusion molding hydraulic press and extrusion method for graphite heaters, comprising: a molding module 7, which is used to hold graphite powder during pressing; a base 4 is fixedly installed at the bottom of the molding module 7; a control cabinet 5 is fixedly installed on the outside of the base 4; and a hydraulic cylinder 1 is fixedly installed at the middle of the top of the molding module 7. Hot pressing assembly 2 is used for graphite powder pressing and molding. The hot pressing assembly 2 is fixedly installed on the actuating end of the hydraulic cylinder 1. The hot pressing assembly 2 is installed inside the molding module 7. The hot pressing assembly 2 is installed on the surface of the molding module 7 through the hydraulic cylinder 1. The material guiding component 3 is used for pretreatment before graphite powder is pressed. A motor 6 is fixedly installed on the outer surface of the material guiding component 3, and the material guiding component 3 is slidably installed inside the forming module 7.

[0023] The material guiding assembly 3 includes a base plate 36, a slide rail 32 is fixedly installed at the bottom of the base plate 36, the slide rail 32 is slidably installed inside the guide groove 77, an inclined plate 35 is fixedly installed at the top of the base plate 36, guide plates 34 are fixedly installed on both sides of the outer surface of the inclined plate 35, a feeding chamber 31 is fixedly installed on the outer surface of the guide plate 34, a material guide port 37 is opened at the top of the feeding chamber 31, a crushing component 33 is rotatably installed inside the feeding chamber 31, and the crushing component 33 is fixedly connected to the output end of the motor 6. Before hot pressing, the operator adjusts the position of the slide rail 32 in the guide groove 77 so that the opening of the guide plate 34 is aligned with the forming groove 75. Then, the operator feeds the graphite powder into the feeding chamber 31 and starts the motor 6, causing the output of the motor 6 to drive the crusher 33 to rotate in the feeding chamber 31. When the graphite powder needs to be compounded with other additives such as resin, metal powder, and ceramic powder, crushing can break the agglomeration of graphite particles, making the additives easier to disperse in the graphite powder. After the crusher 33 crushes and agitates the larger or agglomerated graphite powder, the graphite powder slides onto the inclined plate 35 as the crusher 33 moves. The graphite powder on the inclined plate 35 is guided by the guide plate 34 to fill the forming groove 75. After filling, the operator moves the slide rail 32 out of the guide groove 77 to prevent the inclined plate 35 from affecting the movement of the hot pressing assembly 2 during hot pressing.

[0024] The crushing component 33 includes a rotating shaft 331. A material-pushing blade 332 is rotatably mounted on the outer surface of the rotating shaft 331. A crushing arc plate 333 is fixedly mounted on the surface of the material-pushing blade 332. Mounting rods 334 are fixedly mounted on both sides inside the material-pushing blade 332. A crushing blade 335 is fixedly mounted on the surface of the mounting rod 334. Several crushing blades 335 are provided and are rotatably mounted inside the feeding chamber 31 via the rotating shaft 331. When the operator starts the motor 6, the output end of the motor 6 drives the rotating shaft 331 to rotate inside the feeding chamber 31. At this time, the crushing blades 335 installed inside the material-pushing blade 332 crush and agitate the agglomerated graphite powder. The crushing arc plate 333 on the side of the material-pushing blade 332 crushes the graphite powder accumulated at the bottom of the feeding chamber 31, so that the graphite powder particles are finer. The fine and uniform particles can fill the mold space more tightly and reduce the porosity during hot pressing.

[0025] The molding module 7 includes a molding platform 74. Positioning grooves 78 are provided at the corners of the outer surface of the molding platform 74. Support rods 72 are fixedly installed inside each positioning groove 78. A top plate 71 is fixedly installed on the top of each support rod 72. A protective plate 73 is fixedly installed on the top plate 71 and the outer surface of the molding platform 74. A molding groove 75 is fixedly installed in the middle of the top of the molding platform 74. A pressure plate 76 is installed on the outer side of the molding groove 75. A guide groove 77 is provided inside the pressure plate 76. The operator fills the molding groove 75 with pulverized graphite powder. Then, the operator activates the hydraulic cylinder 1, causing the actuator of the hydraulic cylinder 1 to drive the hot-pressing guide plate 22 to slide downwards on the support rods 72. The molding groove 75 is annular in shape and wedges with the clamping ring 26 at the bottom of the hot-pressing guide plate 22. The hot-pressing guide plate 22 drives the clamping ring 26 downwards, causing the graphite powder between the molding groove 75 and the clamping ring 26 to be extruded and molded.

[0026] The forming table 74 is fixedly installed on the top of the machine base 4. The forming table 74 is adapted to the hot pressing assembly 2 for extrusion. The hot pressing assembly 2 is movably installed on the surface of the support rod 72.

[0027] The second embodiment is based on the first embodiment; please refer to [link / reference]. Figures 4 to 8As shown, the hot pressing assembly 2 includes a collar 23, a hydraulic rod 21 is fixedly installed inside the collar 23, a hot pressing guide plate 22 is fixedly installed at the bottom of the hydraulic rod 21, a uniform heat-conducting component 28 is fixedly installed at the bottom of the hot pressing guide plate 22, through grooves 25 are provided at the corners of the outer surface of the hot pressing guide plate 22, an installation ring 27 is fixedly installed on the top of the hot pressing guide plate 22 near the through groove 25, a clamping ring 26 is fixedly installed at the middle of the bottom of the hot pressing guide plate 22, and the outer side of the clamping ring 26 is installed on the conductive plate 24. The operator starts the hydraulic cylinder 1, causing the actuator of the hydraulic cylinder 1 to drive the hot pressing guide plate 22 to slide on the support rod 72. When the hot pressing guide plate 22 is started, the uniform heat-conducting element 28 inside the hot pressing guide plate 22 is connected to the power supply and heats the hot pressing guide plate 22. The hot pressing guide plate 22 transfers heat to the conduction plate 24. When the hot pressing guide plate 22 is pressed downward, the conduction plate 24 is attached to the pressure plate 76 and transfers heat evenly to the forming table 74. This makes the graphite powder more evenly heated during hot pressing and avoids large temperature differences around the graphite powder during hot pressing, which may lead to local overheating or insufficient curing, and thus cause material performance differences and delamination.

[0028] The collar 23 is fixedly installed on the actuating end of the hydraulic cylinder 1. The hot pressing guide plate 22 is driven by the actuating end of the hydraulic cylinder 1 and installed on the outer surface of the support rod 72. The hot pressing guide plate 22 is squeezed and adapted to the forming table 74. The clamping ring 26 is snapped and adapted to the forming groove 75. Four sets of uniform heat conducting elements 28 are provided, and the four sets of uniform heat conducting elements 28 are evenly arranged inside the hot pressing guide plate 22.

[0029] The uniform heat-conducting component 28 includes a heating coil 282. A sleeve 281 is fitted onto the outer surface of the heating coil 282. Several sleeves 281 are provided, and connecting pipes 283 are symmetrically installed on both sides of the outer surface of each sleeve 281. Copper pipes 284 are fixedly installed on the outer surface of each connecting pipe 283, and connecting rings 285 are fixedly installed on the outer surface of each copper pipe 284. Connecting shells 286 are fixedly installed between the opposite faces of the connecting rings 285. A water inlet pipe 287 and a drain pipe 288 are fixedly installed on the outer surface of the connecting shells 286. When the heating coil 282 is powered on, it heats the hot-pressing guide plate 22. The connecting pipes 283 on both sides of the heating coil 282 are symmetrically distributed with a convex center. The connecting pipes 283 are connected to the bent copper pipes 284. Through the uniform and dense arrangement of multiple sets of copper pipes 284, the hot-pressing guide plate 22 achieves uniform heat conduction during heating.

[0030] Both the drain pipe 288 and the inlet pipe 287 extend through the hot-pressing guide plate 22 to its outer side. The connecting pipes 283 are symmetrically distributed with a central bulge. The copper pipes 284 are evenly arranged on the surface of the connecting shell 286 through the connecting pipes 283. After the graphite powder is hot-pressed, the operator injects cooling liquid into the inlet pipe 287. The connecting shell 286 is configured with two cavities, which are respectively connected to the inlet pipe 287 and the drain pipe 288. The cooling liquid flows along the inlet pipe 287 through the copper pipe 284, the connecting pipe 283, and the connecting ring 285, and flows into the connecting pipe 283 on the other side of the connecting ring 285. After flowing around the heating coil 282, the cooling liquid is discharged into the drain pipe 288 on the other side. When the cooling liquid flows, it cools and dissipates heat from the copper pipe 284 and the heating coil 282. At the same time, the cooling allows the graphite powder to gradually solidify after hot pressing. Multiple separate flow channels can accelerate the heat dissipation efficiency of the pipes and avoid defects in the graphite heater due to sudden temperature drops.

[0031] The third embodiment is based on embodiments one and two; please refer to [link / reference]. Figures 1 to 14 As shown, a hot extrusion molding method for graphite heaters comprises the following steps: S1. Crushing and agitation treatment: Before hot pressing the graphite heater, the operator first starts the motor 6 so that the output end of the motor 6 drives the crushing part 33 to rotate in the feeding chamber 31. Then the graphite powder is put into the feeding chamber 31. At this time, the rotating crushing part 33 performs crushing pretreatment on the graphite powder, refines the larger or agglomerated particles in the graphite powder, thereby improving the powder flowability and filling properties. S2. Powder conveying: The operator adjusts the position of the guide groove 77 of the slide rail 32 so that the guide plate 34 is connected with the forming groove 75. The pre-treated graphite powder is discharged from the feeding chamber 31 onto the inclined plate 35 and fills the forming groove 75 along the inclined plate 35. After filling, the operator adjusts the position of the slide rail 32 so that the slide rail 32 is pulled out from the guide groove 77. S3. Hot pressing: After the graphite powder is filled into the forming groove 75, the operator starts the hydraulic cylinder 1, which causes the actuator of the hydraulic cylinder 1 to drive the hot pressing guide plate 22 to slide down on the support rod 72. The uniform heat-conducting element 28 in the hot pressing guide plate 22 is heated after the power is turned on. The hot pressing guide plate 22 moves down and the conduction plate 24 presses onto the pressure plate 76. The clamping ring 26 is wedged into the forming groove 75 so that the graphite powder is formed under force. S4. Cooling and shaping: After the hot pressing guide plate 22 heats the graphite powder through the uniform heat-conducting component 28, the operator injects cooling liquid into the uniform heat-conducting component 28. The cooling liquid flows through the uniform heat-conducting component 28 to quickly reduce mold stability and keep the graphite material in a stable shape during the hardening process.

[0032] Before hot pressing, the operator adjusts the position of the slide rail 32 in the guide groove 77 so that the opening of the guide plate 34 aligns with the forming groove 75. Then, the operator feeds the graphite powder into the feeding chamber 31 and starts the motor 6, causing the output of the motor 6 to drive the crusher 33 to rotate in the feeding chamber 31. When the graphite powder needs to be compounded with other additives such as resin, metal powder, and ceramic powder, the crushing process breaks up the agglomeration of graphite particles, making the additives easier to disperse in the graphite powder. After the crusher 33 crushes and agitates the larger or agglomerated graphite powder, the graphite powder slides onto the inclined plate 35 as the crusher 33 moves. The graphite powder on the inclined plate 35 is guided by the guide plate 34 to fill the forming groove 75. After filling, the operator moves the slide rail 32 out of the guide groove 77 to prevent the inclined plate 35 from affecting the movement of the hot pressing assembly 2 during hot pressing.

[0033] The operator starts the motor 6, which drives the shaft 331 to rotate in the feeding chamber 31. At this time, the crushing blade 335 installed in the material feeding plate 332 crushes and agitates the agglomerated graphite powder. The rolling arc plate 333 set on the side of the material feeding plate 332 rolls the graphite powder accumulated at the bottom of the feeding chamber 31 to make the graphite powder particles finer. The fine and uniform particles can fill the mold space more tightly and reduce the porosity when the mold is installed before hot pressing.

[0034] The worker fills the pulverized graphite powder into the forming groove 75, and then starts the hydraulic cylinder 1, so that the actuator of the hydraulic cylinder 1 drives the hot pressing guide plate 22 to slide down on the support rod 72. The forming groove 75 is set in a circular shape and is wedge-fixed with the pressing ring 26 at the bottom of the hot pressing guide plate 22. The hot pressing guide plate 22 drives the pressing ring 26 to move down, so that the graphite powder between the forming groove 75 and the pressing ring 26 is squeezed and formed.

[0035] The operator starts the hydraulic cylinder 1, causing the actuator of the hydraulic cylinder 1 to drive the hot pressing guide plate 22 to slide on the support rod 72. When the hot pressing guide plate 22 is started, the uniform heat-conducting element 28 inside the hot pressing guide plate 22 is connected to the power supply and heats the hot pressing guide plate 22. The hot pressing guide plate 22 transfers heat to the conduction plate 24. When the hot pressing guide plate 22 is pressed downward, the conduction plate 24 is attached to the pressure plate 76 and transfers heat evenly to the forming table 74. This makes the graphite powder more evenly heated during hot pressing and avoids large temperature differences around the graphite powder during hot pressing, which may lead to local overheating or insufficient curing, and thus cause material performance differences and delamination.

[0036] After the electric heating coil 282 is connected to the power supply, it heats the hot pressing guide plate 22. The connecting pipes 283 on both sides of the electric heating coil 282 are symmetrically distributed with a protruding middle. The connecting pipes 283 are connected to the bent copper pipes 284. Through the uniform and dense arrangement of multiple sets of copper pipes 284, the hot pressing guide plate 22 can achieve the effect of uniform heat conduction during heating.

[0037] After the graphite powder is hot-pressed, the operator injects cooling liquid into the inlet pipe 287. The connecting shell 286 is configured with two cavities, which are connected to the inlet pipe 287 and the drain pipe 288 respectively. The cooling liquid flows through the copper pipe 284, the connecting pipe 283 and the connecting ring 285 along the inlet pipe 287 and into the connecting pipe 283 on the other side of the connecting ring 285. After flowing around the heating coil 282, the cooling liquid is discharged into the drain pipe 288 on the other side. When the cooling liquid flows, it cools and dissipates heat from the copper pipe 284 and the heating coil 282. At the same time, the cooling allows the graphite powder to gradually solidify after hot pressing. Multiple separate flow channels can accelerate the heat dissipation efficiency of the pipeline and avoid defects in the graphite heater due to sudden temperature drops.

[0038] 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.

[0039] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hot extrusion molding hydraulic press for graphite heaters, characterized in that, include: A molding module (7) is used to hold graphite powder during pressing. A base (4) is fixedly installed at the bottom of the molding module (7). A control cabinet (5) is fixedly installed on the outside of the base (4). A hydraulic cylinder (1) is fixedly installed at the middle of the top of the molding module (7). Hot pressing assembly (2), which is used for graphite powder pressing and molding, is fixedly installed on the execution end of hydraulic cylinder (1), and is installed inside molding module (7). The hot pressing assembly (2) is installed on the surface of molding module (7) by hydraulic cylinder (1). The material guiding component (3) is used for pretreatment before graphite powder pressing. A motor (6) is fixedly installed on the outer surface of the material guiding component (3). The material guiding component (3) is slidably installed inside the molding module (7).

2. The hot extrusion molding hydraulic press for a graphite heater according to claim 1, characterized in that: The molding module (7) includes a molding platform (74). Positioning grooves (78) are provided at the corners of the outer surface of the molding platform (74). Support rods (72) are fixedly installed inside the positioning grooves (78). A top plate (71) is fixedly installed on the top of the support rods (72). A protective plate (73) is fixedly installed on the top plate (71) and the outer surface of the molding platform (74). A molding groove (75) is fixedly installed in the middle of the top of the molding platform (74). A pressure plate (76) is installed on the outside of the molding groove (75). A guide groove (77) is provided inside the pressure plate (76).

3. A hot extrusion molding hydraulic press for a graphite heater according to claim 2, characterized in that: The forming table (74) is fixedly installed on the top of the machine base (4). The forming table (74) is adapted to the hot pressing assembly (2). The hot pressing assembly (2) is movably installed on the surface of the support rod (72).

4. A hot extrusion molding hydraulic press for a graphite heater according to claim 1, characterized in that: The hot pressing assembly (2) includes a collar (23), a hydraulic rod (21) is fixedly installed inside the collar (23), a hot pressing guide plate (22) is fixedly installed at the bottom of the hydraulic rod (21), a uniform heat-conducting component (28) is fixedly installed at the bottom of the hot pressing guide plate (22), through grooves (25) are provided at the corners of the outer surface of the hot pressing guide plate (22), an installation ring (27) is fixedly installed on the top of the hot pressing guide plate (22) near the through groove (25), a clamping ring (26) is fixedly installed at the middle of the bottom of the hot pressing guide plate (22), and the outer side of the clamping ring (26) is installed on the conductive plate (24).

5. A hot extrusion molding hydraulic press for a graphite heater according to claim 4, characterized in that: The collar (23) is fixedly installed on the execution end of the hydraulic cylinder (1). The hot pressing guide plate (22) is driven by the execution end of the hydraulic cylinder (1) and installed on the outer surface of the support rod (72). The hot pressing guide plate (22) is squeezed and adapted to the forming table (74). The clamping ring (26) is snapped and adapted to the forming groove (75). Four sets of uniform heat-conducting components (28) are provided. The four sets of uniform heat-conducting components (28) are evenly arranged inside the hot pressing guide plate (22).

6. A hot extrusion molding hydraulic press for a graphite heater according to claim 5, characterized in that: The uniform heat-conducting component (28) includes an electric heating coil (282). A sleeve (281) is fitted on the outer surface of the electric heating coil (282). Several sleeves (281) are provided. Connecting pipes (283) are symmetrically installed on both sides of the outer surface of several sleeves (281). Copper pipes (284) are fixedly installed on the outer surface of each connecting pipe (283). Connecting rings (285) are fixedly installed on the outer surface of each copper pipe (284). Connecting shells (286) are fixedly installed between the opposite faces of the connecting rings (285). Water inlet pipes (287) and drain pipes (288) are fixedly installed on the outer surface of the connecting shells (286).

7. A hot extrusion molding hydraulic press for a graphite heater according to claim 6, characterized in that: The drain pipe (288) and the inlet pipe (287) both extend through the hot-pressed guide plate (22) to its outer side. The connecting pipes (283) are symmetrically distributed with a protruding middle. The copper pipes (284) are evenly arranged on the surface of the connecting shell (286) through the connecting pipes (283).

8. A hot extrusion molding hydraulic press for a graphite heater according to claim 1, characterized in that: The material guiding assembly (3) includes a base plate (36), a slide rail (32) is fixedly installed at the bottom of the base plate (36), the slide rail (32) is slidably installed inside the guide groove (77), an inclined plate (35) is fixedly installed at the top of the base plate (36), guide plates (34) are fixedly installed on both sides of the outer surface of the inclined plate (35), a feeding chamber (31) is fixedly installed on the outer surface of the guide plate (34), a material guide port (37) is opened at the top of the feeding chamber (31), and a crushing component (33) is rotatably installed inside the feeding chamber (31), and the crushing component (33) is fixedly connected to the output end of the motor (6).

9. A hot extrusion molding hydraulic press for a graphite heater according to claim 8, characterized in that: The crushing component (33) includes a rotating shaft (331), on the outer surface of the rotating shaft (331) a material feeding plate (332) is rotatably mounted, on the surface of the material feeding plate (332) a crushing arc plate (333) is fixedly mounted, on both sides of the inside of the material feeding plate (332) a mounting rod (334) is fixedly mounted, on the surface of the mounting rod (334) a crushing blade (335) is fixedly mounted, and there are several crushing blades (335), which are rotatably mounted inside the feeding chamber (31) through the rotating shaft (331).

10. A hot extrusion forming hydraulic press for a graphite heater according to any one of claims 1-9, now a hot extrusion forming extrusion method for a graphite heater is proposed, characterized in that: It consists of the following steps: S1. Crushing and stirring treatment: Before the graphite heater is hot-pressed, the staff first starts the motor (6) so that the output end of the motor (6) drives the crushing part (33) to rotate in the feeding chamber (31). Then the graphite powder is put into the feeding chamber (31). At this time, the rotating crushing part (33) crushes the graphite powder and refines the larger or agglomerated particles in the graphite powder, thereby improving the powder's fluidity and filling properties. S2. Powder conveying: The staff adjusts the position of the guide groove (77) of the slide rail (32) so that the guide plate (34) is connected with the forming groove (75). The pre-treated graphite powder is discharged from the feeding chamber (31) onto the inclined plate (35) and fills the forming groove (75) along the inclined plate (35). After filling, the staff adjusts the position of the slide rail (32) so that the slide rail (32) is pulled out from the guide groove (77). S3. Hot pressing: After the graphite powder is filled into the forming groove (75), the operator starts the hydraulic cylinder (1), so that the actuator of the hydraulic cylinder (1) drives the hot pressing guide plate (22) to slide down on the support rod (72). The uniform heat-conducting component (28) in the hot pressing guide plate (22) is heated after the power is turned on. The hot pressing guide plate (22) moves down and the conduction plate (24) presses on the pressure plate (76). The clamping ring (26) is wedged into the forming groove (75) so that the graphite powder is formed under force. S4. Cooling and shaping: After the hot pressing guide plate (22) heats the graphite powder through the uniform heat-conducting component (28) for hot pressing, the staff injects cooling liquid into the uniform heat-conducting component (28). The cooling liquid flows through the uniform heat-conducting component (28) to quickly reduce mold stability and keep the graphite material in a stable shape during the hardening process.

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