Production process for extrusion forming of medium-coarse particle graphite product

Abstract

The invention belongs to the technical field of graphite product processing, and particularly relates to a production process of an extrusion-formed medium-coarse particle graphite product, aiming at many factors influencing the quality of the extrusion-formed medium-coarse particle graphite product, such as raw materials, a formula, a forming machine, an extrusion process, a roasting heating curve, a graphitization power transmission curve and the like. In order to solve the problems that the yield is low, a large number of waste products are generated, product indexes are not high and a large amount of waste is caused due to improper production, the following scheme is provided, the method comprises the following steps of S1, raw material selection and formula making, specifically, proper raw materials are selected, and a reasonable formula is made; s2, blank preparation and testing: preparing a blank, testing the performance of the blank, ensuring qualification and the like, through experimental research, straightening out a medium-fine particle extrusion forming graphite product production process, especially a product production process with high requirements and high production difficulty, so that the production safety of various types of products is ensured, the product quality is improved, and the unit cost is reduced; and the production efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of graphite product processing, in particular to a production process of coarse-grained graphite products formed by extrusion. Background Art

[0002] Extruded medium-coarse particle graphite products are widely used in various industries, especially due to their good electrical and thermal conductivity in the long axis direction and high density and low impedance properties. They are widely used in graphitization furnaces, silicon carbide furnaces and other metallurgical resistance furnaces as burner conductive materials, used to make various molds, and can be used as metal electrolysis cathode materials, negative electrode material graphitization furnace core box plate materials, etc. The main products are: graphite electrodes (round products, square products), high-purity graphite blocks, high-temperature resistant conductive graphite blanks, graphitized cathode carbon blocks and other graphite products.

[0003] Extruded medium-coarse-grained graphite products can be used as blanks for large graphite parts, crucible blanks, and can also be used as integral cathodes for metal electrolysis, conductive electrodes for graphitization furnaces and other resistance furnace heads. The entire graphite block can reduce losses, heat generation, energy consumption, improve production efficiency, and increase the service life of the furnace body.

[0004] There are many factors that affect the quality of coarse-grained graphite products produced by extrusion molding, such as raw materials, formula, molding machine and extrusion process, roasting temperature rise curve, graphitization power transmission curve, etc. Improper production will result in low yield, a large amount of waste, low product indicators and other consequences, resulting in a lot of waste. Therefore, research and development of extrusion molding coarse-grained graphite product production technology has important practical significance for improving the performance characteristics of graphite products, improving the pass rate and reducing production costs, and is a problem that needs to be solved urgently in production.

[0005] In addition, the existing extrusion molding machine needs to manually pour the material into the molding mold when in use. The manual feeding method is not only inefficient, but also cannot quantify the material, which is very inconvenient to use. In addition, the molded graphite block will automatically fall off during the material removal process, affecting the molding quality of the graphite block. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a production process for extruded medium-coarse particle graphite products.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A production process for extruded medium-coarse particle graphite products, comprising the following steps:

[0009] S1. Analyze and select the raw materials of the products. Through small tests on various raw materials, select petroleum coke, graphitized coke, and coal tar pitch with appropriate true density, volatile matter, ash content, sulfur content and other indicators to achieve economic rationality;

[0010] S2. Formulate the raw material formula, conduct small tests and adjustments, and select a formula with reasonable indicators;

[0011] S3. The paste prepared on the production line is pressed into a blank on an extruder, and the bulk density and resistivity are tested, and the pressing process parameters are repeatedly adjusted to produce a qualified blank;

[0012] S4, roasting in a roasting process of one layer, adjusting the roasting curve, and improving the qualified rate;

[0013] S5 calcined products are impregnated and calcined twice to increase the volume density and reduce the specific resistance, meeting the product design index requirements;

[0014] S6. Carry out production tests in the graphitization process to improve the yield rate;

[0015] S7, machining and testing.

[0016] The extrusion molding machine includes a processing table and a support frame arranged on the top of the processing table;

[0017] A mold plate is rotatably provided on the top of the processing table, a plurality of mold grooves for receiving materials are opened on the top of the mold plate, and a pressing plate used in conjunction with one of the mold grooves for extruding and molding the materials is provided at the bottom of the support frame;

[0018] A conveyor, the conveyor is arranged on one side of the processing table, the rotating roller of the conveyor is drivingly connected with the pressing plate and the model disk, providing rotation power for the model disk and extrusion power for the pressing plate to perform extrusion molding;

[0019] The quantitative conveying mechanism is arranged on one side of the support frame and is used in conjunction with the pressing plate to quantitatively convey the material to the corresponding die groove;

[0020] A guide rod is arranged on one side of the pressing plate and is used in conjunction with the pressing plate to push the extruded material onto the conveyor belt of the conveyor for conveying to the next process.

[0021] In one possible design, the quantitative conveying mechanism includes a barrel fixed on one side of a support frame, a feed pipe connected to an external hopper is fixedly provided through the top of the barrel, a discharge pipe corresponding to one of the mold grooves is fixedly provided through one end of the barrel, and a spiral conveying roller for conveying materials is rotatably provided through the barrel, and the spiral conveying roller is used in conjunction with a pressure plate.

[0022] In a possible design, a divider is fixedly provided at the bottom of the processing table, a first rotating shaft is fixedly provided at the output end of the divider, the model disk is fixedly sleeved on the first rotating shaft, a first connecting shaft is fixedly provided between the input end of the divider and the rotating roller of the conveyor, for driving the first rotating shaft to rotate intermittently, a second rotating shaft is rotatably provided on one side of the support frame, a lifting plate is slidably provided at the bottom of the support frame, the pressing plate is detachably connected to the bottom of the lifting plate, a plurality of first guide rods are fixedly provided at the top of the lifting plate, the top of the first guide rod passes through the support frame, and a fourth spring is sleeved on the outer wall of the first guide rod, the two ends of the fourth spring are respectively fixedly connected to the outer wall of the first guide rod and the top of the support frame, the outer wall of the second rotating shaft is fixedly sleeved with a cam that conflicts with the lifting plate, a second connecting shaft fixedly connected to the input end of the divider is rotatably provided at the bottom of the processing table, the outer walls of the second connecting shaft and the second rotating shaft are both fixedly sleeved with synchronous wheels, and the outer walls of the two synchronous wheels are transmission-connected with the same synchronous belt.

[0023] In a possible design, a connecting frame is fixedly provided on the top of the lifting plate, a third guide rod is fixedly provided on the other end of the connecting frame, a rack is slidingly sleeved on the outer wall of the third guide rod, a gear meshing with the rack is provided on the outer wall of the spiral conveying roller through a one-way bearing sleeve, a rotating seat is fixedly provided on the bottom of the third guide rod, a second spring is sleeved on the outer wall of the third guide rod, two ends of the second spring are respectively fixedly connected to the top of the rack and the outer wall of the third guide rod, and the guide rod is rotatably arranged in the rotating seat.

[0024] In a possible design, the outer wall of the model plate is provided with a baffle cover, and the baffle cover is fixedly arranged on the top of the processing table. A groove is provided on the inner side of the baffle cover, and a baffle plate for sealing one side of the mold groove is provided in the groove. Two second guide rods are slidably provided through one side of the baffle cover, and the other ends of the two second guide rods are fixedly provided with the same connecting plate. The outer wall of the second guide rod is provided with a first spring, and the two ends of the first spring are respectively fixedly connected to the outer wall of the baffle cover and the inner side of the connecting plate. An insert block is fixedly arranged on one side of the lifting plate, and one side of the insert block is provided with a beveled edge used in conjunction with the connecting plate, which drives the baffle plate to move into the mold groove to seal one side of the mold groove when descending, and a clearance groove corresponding to the insert block is provided on the top of the baffle cover.

[0025] In a possible design, four groups of fourth guide rods are slidably provided in the model disk, and a push plate located in the mold groove is fixedly provided on one side of each group of fourth guide rods. The push plate is used in conjunction with the guide rod to push the material, and a third spring is sleeved on the outer wall of the fourth guide rod. The two ends of the third spring are respectively fixedly connected to the inner wall of one side of the model disk and the outer wall of the fourth guide rod, so as to provide a reset force for the push plate.

[0026] In a possible design, a second guide groove is provided on the top of the model plate, and four first guide grooves communicating with the second guide groove are provided on the top of the model plate. The four first guide grooves respectively correspond to corresponding push plates for guiding the guide rod.

[0027] In a possible design, a pin shaft is rotatably provided through one side of the rotating seat, the guide rod is fixedly sleeved on the pin shaft, and a positioning block is fixedly provided on one side of the rotating seat and the outer wall of the pin shaft for positioning the guide rod.

[0028] In a possible design, the top of the model plate and the processing table are both provided with a plurality of discharge holes, and a scraper for scraping off excess material is fixedly provided on the inner side of the baffle cover. When the upper and lower groups of discharge holes correspond to each other, the material will fall through the discharge holes.

[0029] In the present application, when in use, the device is powered on, and the feed pipe is connected to the external hopper, and then the conveyor is started. During the conveying process of the conveyor, the input end of the divider is driven to rotate through the rotating roller and the first connecting shaft. The rotation of the input end of the divider can drive the second connecting shaft to rotate. The rotation of the second connecting shaft can drive the second rotating shaft to rotate through the synchronous wheel and the synchronous belt. When the convex part of the cam contacts the lifting plate, it will drive the lifting plate to move downward and drive the pressure plate to move downward. The lifting plate can move downward through the connecting frame to drive the third guide rod to move downward. The third guide rod can move downward through the second spring to drive the rack to move downward. The rack can drive the spiral conveying roller to rotate through the gear and the one-way bearing until the limit block on one side of the rack conflicts with the gear, pushing the material in the barrel into the discharge pipe and falling into the corresponding die groove;

[0030] The first connecting shaft drives the input end of the divider to rotate, and at the same time, it can drive the model disk to rotate through the first rotating shaft. After feeding, the model disk rotates, and during the rotation, the scraper will scrape off the excess material on the top. When the upper and lower sets of discharge holes correspond to each other, the material will fall under the processing table for collection, until the die groove after feeding moves to the top of the pressing plate, at this time, the lifting plate drives the pressing plate to move downward, and can drive the insert block to move downward. During the movement, the connecting plate can be driven to move through the bevel. The movement of the connecting plate can drive the baffle to move into the die groove through the second guide rod to seal one side of the die groove. At this time, the lifting plate continues to drive the pressing plate to move downward, which can extrude the material in the die groove and compress the second spring through the rack.

[0031] When the convex part of the cam is away from the lifting plate, the lifting plate can be reset and moved under the action of the fourth spring, the baffle is reset under the action of the first spring, and the rack is driven to reset and move through the third guide rod and the second spring. Due to the setting of the one-way bearing, the spiral conveying roller will not rotate in the opposite direction.

[0032] When the formed material moves to one side of the conveyor, the lifting plate continues to move downward to drive the guide rod to move downward. During the downward movement, the bottom end of the guide rod will slide in the first guide groove, and the top end will rotate in the rotating seat until the bottom end of the guide rod touches the push plate. Continuing to move can push the push plate to move. The movement of the push plate can push the formed material to the conveyor for transportation.

[0033] Beneficial effects:

[0034] Effect 1:

[0035] 1. According to the performance of raw materials such as petroleum coke and graphitized coke, we can experiment to find out the economically reasonable raw materials and formulas of products with different particle sizes;

[0036] 2. According to different product parameter requirements, the specifications and parameters of the stamping machine can be experimentally selected and the production process can be experimentally tested and solidified into the normal production process;

[0037] 3. For different products, different roasting temperature rise curves and production processes of one-shot roasting ring furnaces that ensure quality, safety and energy saving can be tested and solidified as roasting production curves for mass production;

[0038] 4. The production process of product impregnation and secondary roasting can be tested and solidified to guide production;

[0039] 5. According to different types of products, the power transmission curve and production process of the graphitization furnace with quality assurance, safety and high efficiency can be experimentally developed, and solidified as the mass production graphitization production process;

[0040] 6. It can test the machining process, clarify the test indicators and requirements, and guide production;

[0041] Through experimental research, the production process of medium and fine particle extruded graphite products is streamlined, especially the production process of products with high requirements and great production difficulty, to ensure the production safety of various types of products, improve product quality, reduce unit cost, and effectively improve production efficiency, so as to achieve safe production, meet customer product quality requirements, unit cost, production efficiency and other aspects to reach the advanced level in the same industry.

[0042] Effect 2:

[0043] 1. In the present invention, the production process of the coarse-grained graphite product formed by extrusion molding can not only drive the model plate to rotate intermittently by starting the conveyor, but also drive the pressing plate to move up and down through the cam and the fourth spring to perform the extrusion action, so that it can be cyclically carried out without using an additional power source, thereby reducing the use cost;

[0044] 2. In the present invention, the production process of the extruded coarse-grained graphite product can unload the material during the extrusion process by using the lifting plate in conjunction with the spiral conveying roller, and can also drive the baffle plate to move to block one side of the die groove, so that it is convenient for the extrusion molding of the material. At the same time, it can also be used in conjunction with the guide rod to push the molded material to the conveyor for transportation, so that it does not need manual loading and unloading;

[0045] 3. In the present invention, the production process of the coarse-grained graphite product in the extrusion molding, through the coordinated use of the scraper and the discharge hole, can automatically clean up the excess material during the position change process, which is convenient for recycling and does not require manual cleaning, making it more convenient to use;

[0046] 4. In the present invention, by starting the conveyor, not only can the materials be transported, but also the model plate can be driven to rotate, the pressure plate can be lifted and moved, the spiral conveyor roller can rotate, and the guide rod can move, so that the use of electrical components can be reduced, and there is no need for manual loading and unloading, which can improve the processing efficiency and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A three-dimensional structural schematic diagram of a production process of coarse-grained graphite products in extrusion molding proposed by the present invention;

[0048] Figure 2 A schematic diagram of a three-dimensional structure from another perspective of a production process of coarse-grained graphite products in extrusion molding proposed by the present invention;

[0049] Figure 3 A schematic diagram of the connection structure between the lifting plate and the cam in a production process of an extruded medium-coarse particle graphite product proposed by the present invention;

[0050] Figure 4 A schematic diagram of a model plate structure of a production process of an extrusion-molded medium-coarse-grain graphite product proposed by the present invention;

[0051] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of the middle part A;

[0052] Figure 6 A schematic diagram of the quantitative mechanism structure of a production process of coarse-grained graphite products in extrusion molding proposed by the present invention;

[0053] Figure 7 A schematic diagram of the connection structure of a rack and a guide rod in a production process of an extruded medium-coarse particle graphite product proposed by the present invention;

[0054] Figure 8 A schematic diagram of the positioning block structure of a production process of coarse-grained graphite products in extrusion molding proposed by the present invention;

[0055] Fig. 9 A schematic diagram of a partial cross-sectional structure of a model plate of a production process for extrusion-molded medium-coarse-grain graphite products proposed by the present invention;

[0056] Fig.10 The present invention provides a block diagram of a production process for an extruded medium-coarse-grained graphite product.

[0057] In the figure: 1, processing table; 2, first rotating shaft; 3, model plate; 4, mold groove; 5, shield; 6, support frame; 7, second rotating shaft; 8, pressing plate; 9, barrel; 10, conveyor; 11, synchronous wheel; 12, synchronous belt; 13, divider; 14, first connecting shaft; 15, second connecting shaft; 16, first guide rod; 17, lifting plate; 18, cam; 19, insert block; 20, push plate; 21, first guide groove; 22, second guide groove; 23, discharge hole; 2 4. Scraper; 25. Groove; 26. Baffle; 27. Second guide rod; 28. Connecting plate; 29. ​​Bevel; 30. First spring; 31. Make way groove; 32. Feed pipe; 33. Discharge pipe; 34. Screw conveyor roller; 35. Connecting frame; 36. Rack; 37. Gear; 38. Guide rod; 39. Third guide rod; 40. Second spring; 41. Rotating seat; 42. Pin; 43. Positioning block; 44. Fourth guide rod; 45. Third spring; 46. Fourth spring. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0059] Example 1

[0060] Reference Figure 1-Figure 10 A production process of extruded medium-coarse-grain graphite products, which is used in the field of graphite product processing, comprises the following steps:

[0061] S1. Analyze and select the raw materials of the products. Through small tests on various raw materials, select petroleum coke, graphitized coke, and coal tar pitch with appropriate true density, volatile matter, ash content, sulfur content and other indicators to achieve economic rationality;

[0062] S2. Formulate the raw material formula, conduct small tests and adjustments, and select a formula with reasonable indicators;

[0063] S3. The paste prepared on the production line is pressed into a blank on an extruder, and the bulk density and resistivity are tested, and the pressing process parameters are repeatedly adjusted to produce a qualified blank;

[0064] S4, roasting in a roasting process of one layer, adjusting the roasting curve, and improving the qualified rate;

[0065] S5 calcined products are impregnated and calcined twice to increase the volume density and reduce the specific resistance, meeting the product design index requirements;

[0066] S6. Carry out production tests in the graphitization process to improve the yield rate;

[0067] S7, machining and testing.

[0068] Main research:

[0069] 1. The medium-coarse high-density graphite products with a particle size of 0.2-2mm are made from calcined petroleum coke, needle coke and reformed coal tar pitch through pressing, roasting, impregnation, graphitization and mechanical processing. They are mainly used for graphitization furnace and other resistance furnace head electrodes, molds, graphite saggers, etc.

[0070] 2. Fine-grained high-density graphite products with a maximum particle size of no more than 2 mm, made from graphitized coke through pressing, roasting and mechanical processing, are mainly used for graphitized furnace core boxes and columns of negative electrode materials.

[0071] The extrusion molding machine comprises a processing table 1 and a support frame 6 arranged on the top of the processing table 1;

[0072] A mold plate 3 is rotatably provided on the top of the processing table 1, and a plurality of mold grooves 4 for receiving materials are provided on the top of the mold plate 3. A pressing plate 8 is provided at the bottom of the support frame 6 and is used in conjunction with one of the mold grooves 4 to extrude and shape the materials.

[0073] The conveyor 10 is arranged on one side of the processing table 1. The rotating roller of the conveyor 10 is connected with the pressing plate 8 and the model plate 3 to provide rotation power for the model plate 3 and extrusion power for the pressing plate 8 to perform extrusion molding;

[0074] The quantitative conveying mechanism is arranged on one side of the support frame 6 and is used in conjunction with the pressing plate 8 to quantitatively convey the material to the corresponding die groove 4;

[0075] The guide rod 38 is arranged on one side of the pressing plate 8 and is used in conjunction with the pressing plate 8 to push the extruded material to the conveyor belt of the conveyor 10 for transportation to the next process. By starting the conveyor 10, the quantitative conveying mechanism can be driven to transport the material into the die groove 4, and the model disk 3 can be driven to rotate, while the pressing plate 8 can be driven to move up and down. In the process of the pressing plate 8 moving downward, the material in the die groove 4 can be extruded and formed, and the guide rod 38 can be driven to move, pushing the formed material to move to the conveyor 10 for transportation, so that it does not need manual material taking and placing, is more convenient to use, and can improve processing efficiency.

[0076] The quantitative conveying mechanism includes a barrel 9 fixed on one side of the support frame 6, a feed pipe 32 connected to an external hopper is fixedly provided through the top of the barrel 9, a discharge pipe 33 corresponding to one of the die grooves 4 is fixedly provided through one end of the barrel 9, and a spiral conveying roller 34 for conveying materials is rotatably provided in the barrel 9. The spiral conveying roller 34 is used in conjunction with the pressing plate 8. During the descending process of the pressing plate 8, the spiral conveying roller 34 can be driven to rotate. During the rotation of the spiral conveying roller 34, the material in the barrel 9 can be pushed toward the discharge pipe 33 and fall into the corresponding die groove 4 to realize quantitative discharging.

[0077] A divider 13 is fixedly provided at the bottom of the processing table 1, a first rotating shaft 2 is fixedly provided at the output end of the divider 13, a model plate 3 is fixedly sleeved on the first rotating shaft 2, a first connecting shaft 14 is fixedly provided between the input end of the divider 13 and the rotating roller of the conveyor 10, and is used to drive the first rotating shaft 2 to rotate intermittently, a second rotating shaft 7 is rotatably provided through one side of the support frame 6, a lifting plate 17 is slidably provided at the bottom of the support frame 6, a pressing plate 8 is detachably connected to the bottom of the lifting plate 17, a plurality of first guide rods 16 are fixedly provided at the top of the lifting plate 17, the top of the first guide rod 16 penetrates the support frame 6, and a fourth spring 46 is sleeved on the outer wall of the first guide rod 16, and the two ends of the fourth spring 46 are respectively fixed to the outer wall of the first guide rod 16 and the top of the support frame 6 The outer wall of the second rotating shaft 7 is fixedly sleeved with a cam 18 that conflicts with the lifting plate 17. The bottom of the processing table 1 is rotatably provided with a second connecting shaft 15 that is fixedly connected to the input end of the divider 13. The outer walls of the second connecting shaft 15 and the second rotating shaft 7 are both fixedly sleeved with a synchronous wheel 11. The outer walls of the two synchronous wheels 11 are transmission-connected with the same synchronous belt 12. During the conveying process of the conveyor 10, the divider 13 can be driven to rotate through the first connecting shaft 14. The rotation of the divider 13 can drive the model disk 3 to rotate intermittently through the first rotating shaft 2, and can also drive the second rotating shaft 7 to rotate. During the rotation process, the second rotating shaft 7 can drive the lifting plate 17 to move up and down through the cam 18 and the fourth spring 46, thereby driving the pressing plate 8 to extrude the material.

[0078] A connecting frame 35 is fixedly provided on the top of the lifting plate 17, and a third guide rod 39 is fixedly provided on the other end of the connecting frame 35. A rack 36 is slidably sleeved on the outer wall of the third guide rod 39. A gear 37 meshing with the rack 36 is sleeved on the outer wall of the spiral conveying roller 34 through a one-way bearing sleeve. A rotating seat 41 is fixedly provided on the bottom of the third guide rod 39. A second spring 40 is sleeved on the outer wall of the third guide rod 39. The two ends of the second spring 40 are fixedly connected to the top of the rack 36 and the outer wall of the third guide rod 39 respectively. The guide rod 38 is rotatably provided on the rotating seat 41. 1, when the lifting plate 17 moves downward, the third guide rod 39 can be driven to move downward through the connecting frame 35. The third guide rod 39 can drive the rack 36 to move downward through the second spring 40, so that the third guide rod 39 can drive the rack 36 to move downward through the gear 37 and the one-way bearing to drive the spiral conveying roller 34 to rotate and convey materials, and can move downward through the guide rod 38. If the third guide rod 39 continues to move downward, the top end of one side of the rack 36 can contact the gear 37, and the second spring 40 can be compressed, so that the third guide rod 39 can push the materials through the guide rod 38, thereby realizing two-stage movement.

[0079] The outer wall of the model plate 3 is provided with a baffle 5, which is fixedly arranged on the top of the processing table 1. A groove 25 is provided on the inner side of the baffle 5, and a baffle 26 for blocking one side of the mold groove 4 is provided in the groove 25. Two second guide rods 27 are slidably provided through one side of the baffle 5, and the other ends of the two second guide rods 27 are fixedly provided with the same connecting plate 28. The outer wall of the second guide rod 27 is provided with a first spring 30, and the two ends of the first spring 30 are respectively fixedly connected to the outer wall of the baffle 5 and the inner side of the connecting plate 28. A plug block 19 is fixedly provided on one side of the lifting plate 17, and one side of the plug block 19 A bevel 29 is provided for use with the connecting plate 28, which drives the baffle 26 to move into the die groove 4 to block one side of the die groove 4 when descending. A yield groove 31 corresponding to the insert block 19 is provided on the top of the baffle cover 5. During the downward movement of the pressure plate 8, the connecting plate 28 can be driven to move inward through the insert block 19, and the baffle 26 can be driven to move into the die groove 4 to block one side of the die groove 4 to form a groove 25. After the lifting plate 17 moves upward, the baffle 26 can be quickly reset under the action of the first spring 30, which can avoid the model disk 3 from colliding with the baffle 26 when rotating.

[0080] Example 2

[0081] refer to Figure 1-Figure 9, an improvement on the basis of Example 1: four groups of fourth guide rods 44 are slidably provided in the model disk 3, and a push plate 20 located in the mold groove 4 is fixedly provided on one side of each group of fourth guide rods 44. The push plate 20 is used in conjunction with the guide rod 38 to push the material. The outer wall of the fourth guide rod 44 is sleeved with a third spring 45. The two ends of the third spring 45 are respectively fixedly connected to the inner wall of one side of the model disk 3 and the outer wall of the fourth guide rod 44, which is used to provide a reset power for the push plate 20. The push plate 20 can be guided by the setting of the fourth guide rod 44, and when the guide rod 38 is away from the push plate 20, the push plate 20 can be reset and moved under the action of the third spring 45, which is more convenient to use.

[0082] A second guide groove 22 is provided at the top of the model disk 3, and four first guide grooves 21 connected to the second guide groove 22 are provided at the top of the model disk 3. The four first guide grooves 21 correspond to the corresponding push plates 20 respectively and are used to guide the guide rod 38. The setting of the second guide groove 22 and the first guide groove 21 enables the guide rod 38 to be guided to avoid tilting of the guide rod 38 during the downward movement, thereby improving its guiding performance.

[0083] A pin shaft 42 is rotatably provided on one side of the rotating seat 41, and the guide rod 38 is fixedly sleeved on the pin shaft 42. A positioning block 43 is fixedly provided on one side of the rotating seat 41 and the outer wall of the pin shaft 42 for use in conjunction with the guide rod 38. Through the setting of the two positioning blocks 43, the guide rod 38 can be tilted after being reset, which is convenient for controlling the movement of the guide rod 38 during the downward movement process and improving the accuracy of pushing.

[0084] A plurality of discharge holes 23 are provided on the top of the model plate 3 and the processing table 1. A scraper 24 for scraping off excess material is fixedly provided on the inner side of the baffle 5. When the upper and lower groups of discharge holes 23 correspond to each other, the material will fall through the discharge holes 23. By cooperating with the scraper 24 and the discharge holes 23, the model plate 3 can automatically clean the excess material on the mold groove 4 during the rotation process, thereby keeping the top of the model plate 3 clean to avoid affecting subsequent use.

[0085] However, as is well known to those skilled in the art, the working principle and wiring method of the conveyor 10 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any optional selections according to their needs or convenience.

[0086] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A production process for extruded medium-coarse particle graphite products, characterized in that: The following steps are involved: S1. Analyze and select the raw materials of the products. Through small tests on various raw materials, select petroleum coke, graphitized coke, and coal tar pitch with appropriate true density, volatile matter, ash content, and sulfur content to achieve economic rationality; S2. Formulate the raw material formula, conduct small tests and adjustments, and select a formula with reasonable indicators; S3. The paste prepared on the production line is pressed into a blank on an extruder, and the bulk density and resistivity are tested, and the pressing process parameters are repeatedly adjusted to produce a qualified blank; S4, roasting in a roasting process of one layer, adjusting the roasting curve, and improving the qualified rate; S5 calcined products are impregnated and calcined twice to increase the volume density and reduce the specific resistance, meeting the product design index requirements; S6. Carry out production tests in the graphitization process to improve the yield rate; S7, machining and testing.

2. The production process of a coarse-grained graphite product formed by extrusion molding according to claim 1, characterized in that: The extrusion molding machine in S3 comprises a processing table (1) and a support frame (6) arranged on the top of the processing table (1); A mold plate (3) is rotatably provided on the top of the processing table (1), a plurality of mold grooves (4) for receiving materials are provided on the top of the mold plate (3), and a pressing plate (8) is provided at the bottom of the support frame (6) for use with one of the mold grooves (4) for extruding and molding the materials; A conveyor (10), wherein the conveyor (10) is arranged on one side of the processing table (1), and a rotating roller of the conveyor (10) is drivingly connected to the pressing plate (8) and the model plate (3), providing a rotating power for the model plate (3) and an extrusion power for the pressing plate (8), so as to perform extrusion molding; A quantitative conveying mechanism is arranged on one side of the support frame (6) and is used in conjunction with the pressing plate (8) to quantitatively convey the material into the corresponding die groove (4); A guide rod (38) is arranged on one side of the pressing plate (8) and is used in conjunction with the pressing plate (8) to push the extruded material onto the conveyor belt of the conveyor (10) for conveying to the next process.

3. The production process of the extruded medium-coarse-grained graphite product according to claim 2, characterized in that: The quantitative conveying mechanism comprises a barrel (9) fixedly arranged on one side of a support frame (6); a feed pipe (32) connected to an external hopper is fixedly provided through the top of the barrel (9); a discharge pipe (33) corresponding to one of the die grooves (4) is fixedly provided through one end of the barrel (9); a spiral conveying roller (34) for conveying materials is rotatably provided through the inside of the barrel (9); the spiral conveying roller (34) is used in conjunction with a pressing plate (8).

4. The production process of an extruded medium-coarse-grained graphite product according to claim 3, characterized in that: A divider (13) is fixedly provided at the bottom of the processing table (1), a first rotating shaft (2) is fixedly provided at the output end of the divider (13), the model plate (3) is fixedly sleeved on the first rotating shaft (2), a first connecting shaft (14) is fixedly provided between the input end of the divider (13) and the rotating roller of the conveyor (10), and is used to drive the first rotating shaft (2) to rotate intermittently, a second rotating shaft (7) is rotatably provided through one side of the support frame (6), a lifting plate (17) is slidably provided at the bottom of the support frame (6), the pressing plate (8) is detachably connected to the bottom of the lifting plate (17), and a plurality of first guide rods (16) are fixedly provided on the top of the lifting plate (17), The top of the first guide rod (16) passes through the support frame (6), and the outer wall of the first guide rod (16) is sleeved with a fourth spring (46), and the two ends of the fourth spring (46) are respectively fixedly connected to the outer wall of the first guide rod (16) and the top of the support frame (6). The outer wall of the second rotating shaft (7) is fixedly sleeved with a cam (18) that contacts the lifting plate (17). The bottom of the processing table (1) is rotatably provided with a second connecting shaft (15) fixedly connected to the input end of the divider (13). The outer walls of the second connecting shaft (15) and the second rotating shaft (7) are both fixedly sleeved with synchronous wheels (11), and the outer walls of the two synchronous wheels (11) are transmission-connected with the same synchronous belt (12).

5. The production process of the extruded medium-coarse-grained graphite product according to claim 4, characterized in that: A connecting frame (35) is fixedly provided on the top of the lifting plate (17), a third guide rod (39) is fixedly provided on the other end of the connecting frame (35), a rack (36) is slidably sleeved on the outer wall of the third guide rod (39), a gear (37) meshing with the rack (36) is provided on the outer wall of the spiral conveying roller (34) via a one-way bearing sleeve, a rotating seat (41) is fixedly provided on the bottom of the third guide rod (39), a second spring (40) is sleeved on the outer wall of the third guide rod (39), two ends of the second spring (40) are respectively fixedly connected to the top of the rack (36) and the outer wall of the third guide rod (39), and the guide rod (38) is rotatably arranged in the rotating seat (41).

6. The production process of an extruded medium-coarse particle graphite product according to claim 4, characterized in that: The outer wall of the mold plate (3) is provided with a shield (5), the shield (5) is fixedly arranged on the top of the processing table (1), a groove (25) is provided on the inner side of the shield (5), a baffle (26) for blocking one side of the mold groove (4) is provided in the groove (25), two second guide rods (27) are slidably provided through one side of the shield (5), the other ends of the two second guide rods (27) are fixedly provided with a same connecting plate (28), and the outer wall of the second guide rod (27) is provided with A first spring (30), the two ends of which are respectively fixedly connected to the outer wall of the baffle cover (5) and the inner side of the connecting plate (28); an insert block (19) is fixedly provided on one side of the lifting plate (17); one side of the insert block (19) is provided with a bevel (29) for use with the connecting plate (28); when descending, the baffle plate (26) is driven to move into the die groove (4) to block one side of the die groove (4); a clearance groove (31) corresponding to the insert block (19) is provided on the top of the baffle cover (5).

7. The production process of an extruded medium-coarse-grained graphite product according to claim 2, characterized in that: Four groups of fourth guide rods (44) are slidably arranged in the model plate (3), and a push plate (20) located in the mold groove (4) is fixedly arranged on one side of each group of the fourth guide rods (44). The push plate (20) is used in conjunction with the guide rod (38) to push the material. The outer wall of the fourth guide rod (44) is sleeved with a third spring (45), and the two ends of the third spring (45) are respectively fixedly connected to the inner wall of one side of the model plate (3) and the outer wall of the fourth guide rod (44) to provide a reset force for the push plate (20).

8. The production process of the extruded medium-coarse-grained graphite product according to claim 7, characterized in that: The top of the model plate (3) is provided with a second guide groove (22), and the top of the model plate (3) is provided with four first guide grooves (21) which are in communication with the second guide groove (22). The four first guide grooves (21) respectively correspond to corresponding push plates (20) and are used for guiding the guide rod (38).

9. The production process of an extruded medium-coarse-grained graphite product according to claim 5, characterized in that: A pin shaft (42) is rotatably provided through one side of the rotating seat (41), and the guide rod (38) is fixedly sleeved on the pin shaft (42). A positioning block (43) for use in conjunction with the positioning block (43) is fixedly provided on one side of the rotating seat (41) and the outer wall of the pin shaft (42) for positioning the guide rod (38).

10. The production process of an extruded medium-coarse-grained graphite product according to claim 6, characterized in that: The tops of the model plate (3) and the processing table (1) are both provided with a plurality of discharge holes (23), and a scraper (24) for scraping off excess material is fixedly provided on the inner side of the baffle (5). When the upper and lower groups of discharge holes (23) correspond to each other, the material will fall through the discharge holes (23).

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