A production process for extruded coarse-grained graphite products

Abstract

This invention belongs to the field of graphite product processing technology, specifically a production process for extruded coarse-grained graphite products. Many factors influence the quality of extruded coarse-grained graphite products, such as raw materials, formulation, molding machine and extrusion process, calcination temperature rise curve, and graphitization power supply curve. Improper production can lead to low yield, large quantities of waste, and low product specifications, resulting in significant waste. The proposed solution includes the following steps: S1, Raw material selection and formulation: Selecting suitable raw materials and formulating a reasonable formulation; S2, Billet preparation and testing: Preparing billets and testing their properties to ensure compliance. Through experimental research, the production process for extruded graphite products of medium and fine particles is streamlined, especially for products with high requirements and production difficulties. This ensures safe production of various types of products, improves product quality, reduces unit costs, and effectively increases production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of graphite product processing, and particularly relates to a production process of extrusion-formed medium-coarse particle graphite product. BACKGROUND

[0002] The extrusion-formed medium-coarse particle graphite product is widely used in various industries, and is widely used in the head conductive material of a metallurgical resistance furnace such as a graphitization furnace and a silicon carbide furnace, is used for manufacturing various molds, can be used as a metal electrolysis cathode material, a negative material graphitization furnace core box plate material, and the like, and main products include: graphite electrodes (round products and square products), high-purity graphite blocks, high-temperature-resistant conductive graphite blanks, graphitized cathode carbon blocks, and the like.

[0003] The extrusion-formed medium-coarse particle graphite product can be used as a blank of a large graphite piece, a crucible blank, a whole cathode for metal electrolysis, and a resistance furnace head conductive electrode of a graphitization furnace, and the like, and the whole graphite block can reduce loss, heat generation, energy consumption, and improve production efficiency, and prolong the service life of the furnace body.

[0004] Many factors affect the quality of the extrusion-formed medium-coarse particle graphite product, such as raw materials, formulations, forming machines, extrusion processes, baking temperature rising curves, and graphitization power supply curves, and improper production can cause low product yield, a large amount of waste, low product indexes, and the like, and cause a large amount of waste, and therefore, research and development of the production process of the extrusion-formed medium-coarse particle graphite product has important practical significance for improving the performance characteristics of the graphite product, improving the yield, and reducing production costs, and is an urgent problem to be solved in production.

[0005] In addition, the existing extrusion forming machine needs to manually pour the material into the forming mold, the manual feeding method is not only low in efficiency, but also cannot quantitatively feed the material, is very inconvenient to use, and the formed graphite block automatically falls in the process of taking the material, affecting the forming quality of the graphite block. SUMMARY

[0006] The present application aims at solving the problems in the prior art, and provides a production process of extrusion-formed medium-coarse particle graphite product.

[0007] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0008] A production process of extrusion-formed medium-coarse particle graphite product, comprising the following steps:

[0009] S1, analyze and select raw materials of products, select petroleum coke, graphitized coke and coal pitch with proper true density, volatile matter, ash content and sulfur content by small scale test of various raw materials to achieve economic rationality;

[0010] S2, formulate raw material formula, conduct small scale test and adjustment, and select reasonable formula;

[0011] S3, the paste prepared on the production line is extruded into a blank on the extrusion molding machine, the volume density and specific resistance are tested and the molding process parameters are repeatedly adjusted to make qualified blanks;

[0012] S4, baking in a layer of baking process, adjusting the baking curve to improve the qualified rate;

[0013] S5, the baked product is impregnated and secondarily baked to improve the volume density and reduce the specific resistance to meet the product design index requirements;

[0014] S6, production test in graphitization process to improve the yield;

[0015] S7, machining and testing.

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

[0017] A mold disc is rotatably arranged on the top of the machining table, a plurality of mold grooves for containing materials are formed in the top of the mold disc, a pressing plate matched with one of the mold grooves is arranged at the bottom of the support frame for extruding the materials;

[0018] A conveyor is arranged on one side of the machining table, the rotating rollers of the conveyor are in transmission connection with the pressing plate and the mold disc to provide rotating power for the mold disc and extruding power for the pressing plate for extrusion molding;

[0019] A quantitative conveying mechanism is arranged on one side of the support frame and matched with the pressing plate for quantitatively conveying the materials into the corresponding mold grooves;

[0020] A guide rod is arranged on one side of the pressing plate and matched with the pressing plate for pushing the extrusion-molded materials to the conveying belt of the conveyor for conveying to the next process.

[0021] In a possible design, the quantitative conveying mechanism comprises a barrel fixed on one side of the support frame, a feeding pipe connected with an external hopper is fixedly arranged on the top of the barrel, a discharging pipe corresponding to one of the mold grooves is fixedly arranged at one end of the barrel, a spiral conveying roller for conveying the materials is rotatably arranged in the barrel and matched with the pressing plate.

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

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

[0024] In a possible design, the outer wall of the model disc is sleeved with a cover, the cover is fixedly arranged on the top of the processing table, the inner side of the cover is provided with a groove, the groove is provided with a baffle for blocking one side of the mold groove, one side of the cover is slidably provided with two second guide rods, the other end of the two second guide rods is fixedly provided with a same connecting plate, the outer wall of the second guide rod is sleeved with a first spring, the two ends of the first spring are fixedly connected with the outer wall of the cover and the inner side of the connecting plate respectively, one side of the lifting plate is fixedly provided with a plug, one side of the plug is provided with an inclined edge matched with the connecting plate, and the baffle is driven to move into the mold groove to block one side of the mold groove when descending, and the top of the cover is provided with a clearance slot corresponding to the plug.

[0025] In a possible design, four groups of fourth guide rods are slidably arranged in the model disc, one side of each group of the fourth guide rods is fixedly provided with a push plate located in the mold groove, the push plate is matched with the guide rod for pushing the material, the outer wall of the fourth guide rod is sleeved with a third spring, the two ends of the third spring are fixedly connected with the inner wall of one side of the model disc and the outer wall of the fourth guide rod respectively, for providing a reset power for the push plate.

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

[0027] In a possible design, a pin shaft is rotatably arranged on one side of the rotating seat, the guide rod is fixedly sleeved on the pin shaft, and the one side of the rotating seat and the outer wall of the pin shaft are both fixedly provided with positioning blocks for cooperation.

[0028] In a possible design, the top of the model disc and the top of the machining table are both provided with a plurality of discharge holes, the inner side of the cover is fixedly provided with a scraper for scraping off excess materials, and when the upper and lower groups of discharge holes correspond to each other, the materials fall through the discharge holes.

[0029] In this application, when in use, the device is powered on, the feeding pipe is connected with the external hopper, and then the conveyor is started. In 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, and 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, the lifting plate is driven to move downward, and the pressing plate is driven to move downward. The downward movement of the lifting plate can drive the third guide rod to move downward through the connecting frame. The downward movement of the third guide rod can drive the rack to move downward through the second spring. The downward movement of the rack can drive the helical conveying roller to rotate through the gear and the one-way bearing. Until the limiting block on one side of the rack abuts against the gear, the materials in the barrel are pushed into the discharge pipe and fall into the corresponding mold groove.

[0030] The first connecting shaft drives the input end of the divider to rotate at the same time, and the first rotating shaft drives the model disc to rotate. After feeding, the model disc rotates. In the rotating process, the scraper is used to scrape off the excess materials above. When the upper and lower groups of discharge holes correspond to each other, the materials fall below the machining table for collection. Until the mold groove after feeding moves to the upper side of the pressing plate, the lifting plate drives the pressing plate to move downward, which can drive the plug to move downward. In the moving process, the inclined edge can drive the connecting plate to move, and the connecting plate can drive the baffle to move into the mold groove to block one side of the mold groove. At this time, the lifting plate continues to drive the pressing plate to move downward, which can extrude and form the materials in the mold groove, and the rack can compress the second spring.

[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 reset and moved through the third guide rod and the second spring. Due to the setting of the one-way bearing, the helical conveying roller will not rotate in reverse.

[0032] When the formed material moves to the side of the conveyor, the lifting plate continues to move downward to drive the guide rod to move downward, and the bottom end of the guide rod slides in the first guide groove, and the top end rotates in the rotating seat during the downward movement, until the bottom end of the guide rod abuts against the push plate, and continues to move to push the push plate to move, and the movement of the push plate can push the formed material to the conveyor for conveying.

[0033] Advantages:

[0034] Effect I:

[0035] 1. According to the performance of petroleum coke, graphitized coke and other raw materials, the economic and reasonable product raw materials and formula under different particle sizes can be experimented;

[0036] 2. According to different product parameter requirements, the specifications, parameters of the punch and the production process can be selected and experimented, and the normal production process is solidified;

[0037] 3. According to different products, different one-time baking ring furnace quality, safety, energy-saving baking temperature rising curves and production processes can be experimented, and the baking production curves are solidified as mass production;

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

[0039] 5. According to different product types, the quality, safety and high-efficiency graphite furnace power supply curve and production process of the graphite furnace can be experimented, and the graphite production process is solidified as mass production;

[0040] 6. The mechanical processing technology can be experimented, and the test index and requirement are clear, which can guide production;

[0041] Through experimental research, the production process of extrusion molding graphite products of medium and fine particles is straightened out, especially the production process of products with high requirements and difficult production, to ensure the production safety of various types of products, improve product quality, reduce unit cost, effectively improve production efficiency, and achieve the advanced level of the same industry in safety production, meeting customer product quality requirements, unit cost and production efficiency.

[0042] Effect II:

[0043] 1. In the production process of the extrusion molding medium-coarse particle graphite product, the intermittent rotation of the model disc can be driven by starting the conveyor, and the pressing plate can be driven to move up and down by the cam and the fourth spring, so that the extrusion action can be circularly performed without using an additional power source, thereby reducing the use cost.

[0044] 2. In the application, the production process of the extrusion molding medium coarse particle graphite product, through the cooperation of the lifting plate and the spiral conveying roller, can discharge the material during the extrusion process, and can also drive the baffle to move to block one side of the mold groove, so that it is convenient for the material to be extruded and molded, and the molded material can be pushed to the conveyor for conveying by cooperating with the guide rod, so that manual feeding and discharging is not needed;

[0045] 3. In the application, the production process of the extrusion molding medium coarse particle graphite product, through the cooperation of the scraper and the discharge hole, the excess material can be automatically cleaned during the position changing process, which is convenient for recycling and does not need manual cleaning, and the use is more convenient;

[0046] 4. In the application, by starting the conveyor, the material can be conveyed, the model disc can be driven to rotate, the pressing plate can be driven to move up and down, the spiral conveying roller can be driven to rotate, and the guide rod can be driven to move, so that the use of electrical devices can be reduced, manual feeding and discharging is not needed, the processing efficiency can be improved, and the use is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 A three-dimensional structure schematic diagram of the production process of the extrusion molding medium coarse particle graphite product is provided in the application;

[0048] Figure 2 A three-dimensional structure schematic diagram of the production process of the extrusion molding medium coarse particle graphite product is provided in the application;

[0049] Figure 3 A lifting plate and cam connection structure schematic diagram of the production process of the extrusion molding medium coarse particle graphite product is provided in the application;

[0050] Figure 4 A model disc structure schematic diagram of the production process of the extrusion molding medium coarse particle graphite product is provided in the application;

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

[0052] Figure 6 A quantitative mechanism structure schematic diagram of the production process of the extrusion molding medium coarse particle graphite product is provided in the application;

[0053] Figure 7 A rack and guide rod connection structure schematic diagram of the production process of the extrusion molding medium coarse particle graphite product is provided in the application;

[0054] Figure 8 A positioning block structure schematic diagram of the production process of the extrusion molding medium coarse particle graphite product is provided in the application;

[0055] Figure 9 A model disc partial sectional view structure schematic diagram of a production process of extrusion forming medium coarse particle graphite products is provided for the present application;

[0056] Figure 10 A block diagram of a production process of extrusion forming medium coarse particle graphite products is provided for the present application.

[0057] In the figure: 1, processing table; 2, first rotating shaft; 3, model disc; 4, mold groove; 5, cover; 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, plug; 20, push plate; 21, first guide groove; 22, second guide groove; 23, discharge hole; 24, scraper; 25, recess; 26, baffle; 27, second guide rod; 28, connecting plate; 29, bevel; 30, first spring; 31, clearance groove; 32, feeding pipe; 33, discharging pipe; 34, spiral conveying roller; 35, connecting frame; 36, rack; 37, gear; 38, guide rod; 39, third guide rod; 40, second spring; 41, rotating seat; 42, pin shaft; 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 application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0059] Embodiment 1

[0060] Reference Figures 1-10 A production process of extrusion forming medium coarse particle graphite products is applied in the field of graphite product processing, and includes the following steps:

[0061] S1, analyzing and selecting the raw materials of the products, selecting the petroleum coke, graphitized coke and coal pitch with appropriate indexes such as true density, volatile matter, ash content and sulfur content by small-scale test of various raw materials, so as to achieve economic rationality;

[0062] S2, formulating a raw material formula, performing small-scale test and adjustment, and selecting a reasonable formula;

[0063] S3, extruding the paste prepared on the production line on the extrusion forming machine to obtain a blank, testing the bulk density and specific resistance, repeatedly adjusting the molding process parameters, and making a qualified blank;

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

[0065] S5, baking products through impregnation, secondary baking, to improve the bulk density, reduce the specific resistance, to meet the product design index requirements;

[0066] S6, in the graphitization process to improve the production rate;

[0067] S7, machining and testing.

[0068] Main research:

[0069] 1, with calcined petroleum coke, needle coke, modified coal tar pitch as raw material, through the type, baking, impregnation, graphitization and mechanical processing and made of medium coarse particle high density graphite products in 0.2-2mm, mainly used for graphite furnace and other resistance furnace electrode, mold, graphite ladle, etc.;

[0070] 2, with graphitized coke as raw material, through the type, baking, mechanical processing and made of fine particle high density graphite products with the maximum particle size not more than 2mm, mainly used for negative material graphite furnace core box plate and column.

[0071] Extrusion molding machine includes processing table 1 and the support frame 6 arranged on the top of the processing table 1;

[0072] The top of the processing table 1 is rotatably provided with a mold disc 3, a plurality of mold grooves 4 for containing materials are formed in the top of the mold disc 3, and the bottom of the support frame 6 is provided with a pressing plate 8 matched with one of the mold grooves 4, for extruding the materials;

[0073] The conveyor 10 is arranged on one side of the processing table 1, and the rotating roller of the conveyor 10 is in transmission connection with the pressing plate 8 and the mold disc 3, so as to provide rotating power for the mold disc 3 and extruding power for the pressing plate 8, for extruding;

[0074] The quantitative conveying mechanism is arranged on one side of the support frame 6 and matched with the pressing plate 8, for quantitatively conveying the materials into the corresponding mold grooves 4;

[0075] The guide rod 38 is arranged on one side of the pressing plate 8 and matched with the pressing plate 8, for pushing the extruded materials to the conveying belt of the conveyor 10 and conveying to the next process, so that the quantitative conveying mechanism can be driven to convey the materials into the mold grooves 4, the mold disc 3 can be driven to rotate, and the pressing plate 8 can be driven to move up and down, the materials in the mold grooves 4 can be extruded in the process of downward movement of the pressing plate 8, and the guide rod 38 can be driven to move, so as to push the formed materials to the conveyor 10 for conveying, without manual taking and placing materials, so that the use is more convenient and the processing efficiency can be improved.

[0076] The quantitative conveying mechanism comprises a material cylinder 9 fixed on one side of the support frame 6, a feeding pipe 32 connected with an external hopper is fixedly arranged on the top of the material cylinder 9, a discharging pipe 33 corresponding to one of the mold grooves 4 is fixedly arranged on one end of the material cylinder 9, a spiral conveying roller 34 for conveying materials is rotatably arranged in the material cylinder 9, the spiral conveying roller 34 is used in cooperation with the pressing plate 8, and the spiral conveying roller 34 can be driven to rotate in the process that the pressing plate 8 descends, the spiral conveying roller 34 can push the materials in the material cylinder 9 to the discharging pipe 33 and fall into the corresponding mold groove 4 in the process that the spiral conveying roller 34 rotates, so that quantitative discharging is realized.

[0077] A divider 13 is fixedly arranged at the bottom of the processing table 1, a first rotating shaft 2 is fixedly arranged at the output end of the divider 13, the mold disc 3 is fixedly sleeved on the first rotating shaft 2, a same first connecting shaft 14 is fixedly arranged between the input end of the divider 13 and the rotating roller of the conveyor 10, for driving the first rotating shaft 2 to intermittently rotate, a second rotating shaft 7 is rotatably arranged at one side of the support frame 6, a lifting plate 17 is slidably arranged at the bottom of the support frame 6, the pressing plate 8 is detachably connected to the bottom of the lifting plate 17, a plurality of first guide rods 16 are fixedly arranged at the top of the lifting plate 17, the top of the first guide rod 16 penetrates through the support frame 6, and a fourth spring 46 is sleeved on the outer wall of the first guide rod 16, the two ends of the fourth spring 46 are fixedly connected with the outer wall of the first guide rod 16 and the top of the support frame 6 respectively, a cam 18 abutting against the lifting plate 17 is fixedly sleeved on the outer wall of the second rotating shaft 7, a second connecting shaft 15 fixedly connected with the input end of the divider 13 is rotatably arranged at the bottom of the processing table 1, the outer walls of the second connecting shaft 15 and the second rotating shaft 7 are fixedly sleeved with synchronous wheels 11, and the outer walls of the two synchronous wheels 11 are drivingly connected with a same synchronous belt 12, the conveyor 10 can drive the divider 13 to rotate through the first connecting shaft 14 in the conveying process, the divider 13 can drive the mold disc 3 to intermittently rotate through the first rotating shaft 2, and the second rotating shaft 7 can also be driven to rotate, 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 in the rotating process, so that the pressing plate 8 can extrude the materials.

[0078] The top of the lifting plate 17 is fixedly provided with a connecting frame 35, the other end of the connecting frame 35 is fixedly provided with a third guide rod 39, the outer wall of the third guide rod 39 is slidably sleeved with a rack 36, the outer wall of the spiral conveying roller 34 is sleeved with a gear 37 engaged with the rack 36 through a one-way bearing, the bottom of the third guide rod 39 is fixedly provided with a rotating seat 41, the outer wall of the third guide rod 39 is sleeved with a second spring 40, the two ends of the second spring 40 are fixedly connected with the top of the rack 36 and the outer wall of the third guide rod 39 respectively, the guide rod 38 is rotatably arranged in the rotating seat 41, 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 moves downward to drive the rack 36 to move downward through the second spring 40, so that the spiral conveying roller 34 can be driven to rotate to convey the material through the gear 37 and the one-way bearing, and the guide rod 38 can move downward, and when continuously moving downward, the side top end of the rack 36 can abut against the gear 37, and the second spring 40 can be compressed, so that the guide rod 38 can push the material, and two-stage movement is realized.

[0079] The outer wall of the model disc 3 is sleeved with a cover 5, the cover 5 is fixedly arranged on the top of the machining table 1, the inner side of the cover 5 is provided with a groove 25, the groove 25 is provided with a baffle 26 for blocking one side of the mold groove 4, two second guide rods 27 are slidably arranged on one side of the cover 5, 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 sleeved with a first spring 30, the two ends of the first spring 30 are fixedly connected with the outer wall of the cover 5 and the inner side of the connecting plate 28 respectively, one side of the lifting plate 17 is fixedly provided with an insertion block 19, one side of the insertion block 19 is provided with an inclined edge 29 used in cooperation with the connecting plate 28, when descending, the baffle 26 is driven to move into the mold groove 4 to block one side of the mold groove 4, the top of the cover 5 is provided with a gap slot 31 corresponding to the insertion block 19, during the downward movement of the pressing plate 8, the connecting plate 28 can be driven to move inward through the insertion block 19, the baffle 26 can be driven to move into the mold groove 4 to block one side of the mold groove 4, the groove 25 is formed, and after the lifting plate 17 moves upward, the baffle 26 can be quickly reset under the action of the first spring 30, and the baffle 26 can be prevented from abutting against the model disc 3 when the model disc 3 rotates.

[0080] Embodiment 2

[0081] Reference Figures 1-9Improvements based on Example 1: Four sets of fourth guide rods 44 are slidably provided inside the model disk 3. Each set of fourth guide rods 44 has a push plate 20 fixedly located in the mold groove 4 on one side. The push plate 20 works in conjunction with the guide rod 38 to push materials. A third spring 45 is sleeved on the outer wall of the fourth guide rod 44. The two ends of the third spring 45 are fixedly connected to the inner wall of one side of the model disk 3 and the outer wall of the fourth guide rod 44, respectively, to provide reset power for the push plate 20. The fourth guide rod 44 can guide the push plate 20, and when the guide rod 38 moves away from the push plate 20, the push plate 20 can reset and move under the force of the third spring 45, making it more convenient to use.

[0082] The top of the model disk 3 is provided with a second guide groove 22, and the top of the model disk 3 is provided with four first guide grooves 21 that communicate with the second guide groove 22. The four first guide grooves 21 correspond to the corresponding push plates 20 and are used to guide the guide rod 38. The setting of the second guide groove 22 and the first guide grooves 21 enables the guide rod 38 to be guided, preventing the guide rod 38 from tilting during its downward movement and improving its guiding performance.

[0083] A pivot pin 42 is rotatably mounted on one side of the rotating seat 41. The guide rod 38 is fixedly sleeved on the pivot pin 42. Positioning blocks 43 are fixedly mounted on one side of the rotating seat 41 and the outer wall of the pivot pin 42 for positioning the guide rod 38. The setting of the two positioning blocks 43 allows the guide rod 38 to be tilted after resetting, which facilitates the control of the movement of the guide rod 38 during the downward movement and improves the accuracy of pushing.

[0084] Multiple discharge holes 23 are provided on the top of both the model plate 3 and the processing table 1. A scraper 24 for scraping off excess material is fixed on the inner side of the baffle 5. When the upper and lower sets of discharge holes 23 are aligned, the material will fall through the discharge holes 23. Through the cooperation of the scraper 24 and the discharge holes 23, the model plate 3 can automatically clean the excess material on the mold groove 4 during rotation, keeping the top of the model plate 3 clean and avoiding 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 all conventional means or common knowledge, so they will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0086] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A production process of an extruded meso-granular graphite product, characterized by, It comprises the following steps: S1, analyzing and selecting raw materials of products, selecting petroleum coke, graphitized coke and coal pitch with appropriate true density, volatile matter, ash content and sulfur content by small-scale test of various raw materials, so as to achieve economic rationality; S2, formulating raw material formula, conducting small-scale test and adjustment, and selecting reasonable formula; S3, extruding the paste prepared on the production line on the extrusion molding machine to form a blank, testing and repeatedly adjusting the molding process parameters of volume density and specific resistance to make qualified blank; S4, baking in a layer of baking process, adjusting the baking curve, and improving the qualified rate; S5, improving the volume density and reducing the specific resistance of the baked product after impregnation and secondary baking to meet the product design index requirements; S6, conducting production test in the graphitization process to improve the yield; S7, machining and testing; The extrusion molding machine in S3 comprises a machining table (1) and a support frame (6) arranged on the top of the machining table (1); A mold disc (3) is rotatably arranged on the top of the machining table (1), a plurality of mold grooves (4) for containing materials are formed in the top of the mold disc (3), and a pressing plate (8) matched with one of the mold grooves (4) is arranged at the bottom of the support frame (6) to extrude the material; A conveyor (10) is arranged on one side of the machining table (1), and the rotating rollers of the conveyor (10) are in transmission connection with the pressing plate (8) and the mold disc (3) to provide rotating power for the mold disc (3) and extruding power for the pressing plate (8) for extrusion molding; A quantitative conveying mechanism is arranged on one side of the support frame (6) and matched with the pressing plate (8) to quantitatively convey the material into the corresponding mold groove (4); A guide rod (38) is arranged on one side of the pressing plate (8) and matched with the pressing plate (8) to push the extruded material to the conveying belt of the conveyor (10) for conveying to the next process; The quantitative conveying mechanism comprises a material cylinder (9) fixed on one side of the support frame (6), an inlet pipe (32) connected with an external hopper is fixedly arranged on the top of the material cylinder (9), an outlet pipe (33) corresponding to one of the mold grooves (4) is fixedly arranged at one end of the material cylinder (9), a spiral conveying roller (34) for conveying the material is rotatably arranged in the material cylinder (9), and the spiral conveying roller (34) is matched with the pressing plate (8); The bottom of the processing table (1) is fixedly provided with a divider (13), the output end of the divider (13) is fixedly provided with a first rotating shaft (2), the model disc (3) is fixedly sleeved on the first rotating shaft (2), the input end of the divider (13) and the rotating roller of the conveyor (10) are fixedly provided with a same first connecting shaft (14), for driving the first rotating shaft (2) to intermittently rotate, one side of the supporting frame (6) is rotatably provided with a second rotating shaft (7), the bottom of the supporting frame (6) is slidably provided with a lifting plate (17), the pressing plate (8) is detachably connected to the bottom of the lifting plate (17), the top of the lifting plate (17) is fixedly provided with a plurality of first guide rods (16), the top of the first guide rod (16) penetrates through the supporting frame (6), and the outer wall of the first guide rod (16) is sleeved with a fourth spring (46), the two ends of the fourth spring (46) are fixedly connected with the outer wall of the first guide rod (16) and the top of the supporting frame (6) respectively, the outer wall of the second rotating shaft (7) is fixedly sleeved with a cam (18) abutting against the lifting plate (17), the bottom of the processing table (1) is rotatably provided with a second connecting shaft (15) fixedly connected with the input end of the divider (13), the outer walls of the second connecting shaft (15) and the second rotating shaft (7) are fixedly sleeved with a synchronous wheel (11), and the outer walls of the two synchronous wheels (11) are transmissionally connected with a same synchronous belt (12).

2. A process for the production of an extruded product of coarse particulate graphite according to claim 1, characterized in that, The top of the lifting plate (17) is fixedly provided with a connecting frame (35), the other end of the connecting frame (35) is fixedly provided with a third guide rod (39), the outer wall of the third guide rod (39) is slidably sleeved with a rack (36), the outer wall of the spiral conveying roller (34) is sleeved with a gear (37) engaged with the rack (36) through a one-way bearing, the bottom of the third guide rod (39) is fixedly provided with a rotating seat (41), the outer wall of the third guide rod (39) is sleeved with a second spring (40), and the two ends of the second spring (40) are fixedly connected with the top of the rack (36) and the outer wall of the third guide rod (39) respectively, and the guide rod (38) is rotatably arranged in the rotating seat (41).

3. A process for the production of an extruded product of meso- crystalline particulate graphite according to claim 2, characterized in that, The outer wall of the model disc (3) is sleeved with a cover (5), the cover (5) is fixedly arranged on the top of the machining table (1), a recess (25) is arranged in the inner side of the cover (5), a baffle (26) for blocking one side of the mold groove (4) is arranged in the recess (25), two second guide rods (27) are slidably arranged on one side of the cover (5), one end of the two second guide rods (27) is fixedly arranged with the same connecting plate (28), the outer wall of the second guide rod (27) is sleeved with the first spring (30), the two ends of the first spring (30) are fixedly connected with the outer wall of the cover (5) and the inner side of the connecting plate (28), one side of the lifting plate (17) is fixedly arranged with the insertion block (19), one side of the insertion block (19) is arranged with the bevel (29) used in cooperation with the connecting plate (28), when descending, the baffle (26) is driven to move into the mold groove (4) to block one side of the mold groove (4), the top of the cover (5) is arranged with the accommodation groove (31) corresponding to the insertion block (19).

4. A process for the production of an extruded product of coarse particulate graphite according to claim 3, characterized in that, Four groups of fourth guide rods (44) are slidably arranged in the model disc (3), one side of each group of the fourth guide rods (44) is fixedly arranged with the push plate (20) located in the mold groove (4), the push plate (20) is used in cooperation with the guide rod (38) to push the material, the outer wall of the fourth guide rod (44) is sleeved with the third spring (45), the two ends of the third spring (45) are fixedly connected with the inner wall of one side of the model disc (3) and the outer wall of the fourth guide rod (44), to provide the reset power for the push plate (20).

5. A process for the production of an extruded product of meso- crystalline particulate graphite according to claim 4, characterized in that, The top of the model disc (3) is arranged with the second guide groove (22), the top of the model disc (3) is arranged with the four first guide grooves (21) communicating with the second guide groove (22), the four first guide grooves (21) correspond to the corresponding push plates (20) respectively, to guide the guide rod (38).

6. A process for the production of an extruded product of meso- crystalline particulate graphite according to claim 5, characterized in that, One side of the rotating seat (41) is rotatably arranged with the pin shaft (42), the guide rod (38) is fixedly sleeved on the pin shaft (42), the outer wall of one side of the rotating seat (41) and the pin shaft (42) is fixedly arranged with the positioning block (43) used in cooperation, to position the guide rod (38).

7. A process for the production of an extruded product of meso- crystalline particulate graphite according to claim 6, characterized in that, The top of the model disc (3) and the machining table (1) is arranged with a plurality of discharge holes (23), the inner side of the cover (5) is fixedly arranged with the scraper (24) for scraping off the excess material, when the upper and lower groups of discharge holes (23) correspond, the material will fall through the discharge hole (23).

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