A preparation method of flexible graphite paper and calendering equipment thereof

Abstract

The present application discloses a method for preparing flexible graphite paper and a calendering device thereof, belonging to the technical field of graphite paper preparation. It comprises: a calendering table, a steel belt for conveying expanded graphite is arranged inside the calendering table, a pressing roller for compacting graphite is arranged on the top of the steel belt, and a cloth rack for installing a feeding device is fixedly arranged on the top of the calendering table; a calendering roller for calendering and flattening graphite paper; two groups of calendering rollers are arranged, and each group of calendering rollers runs synchronously with the steel belt; a trimming mechanism is arranged between the two groups of calendering rollers, and is used to trim the edges of graphite paper; the present application adopts a motor to drive the calendering roller and the trimming mechanism to run intermittently and alternately, so that the calendering roller conveys the graphite paper for a certain distance and then automatically trims the two sides through the trimming mechanism, so as to facilitate trimming the two sides during the preparation process of graphite paper, so as to effectively solve the problem of inconvenience in shaping the edges of graphite paper, and thus achieve the effect of facilitating trimming the edges of graphite paper after calendering.

Description

Technical Field

[0001] The present application relates to the technical field of graphite paper preparation, and more specifically, to a method for preparing flexible graphite paper and a calendering device thereof. Background Art

[0002] The preparation method of flexible graphite paper mainly includes a graphite interlayer reaction unit, a water washing and drying unit, a heating expansion unit and a pressure molding unit. These units can be operated continuously, providing the possibility of continuity of the entire process, so that the preparation method can continuously carry out intercalation reactions, while reducing washing wastewater and product sulfur content, and finally preparing flexible graphite paper that meets the indicators.

[0003] In the related art, in order to achieve the calendering effect of the flexible graphite paper when preparing the flexible graphite paper, for example, the patent with the prior art publication number CN112873680B provides a method for preparing the flexible graphite paper, wherein the flexible graphite paper calender in the method includes a feeding bin, a driving wheel, a first driven wheel, a second driven wheel, a third driven wheel, a first steel belt, a second steel belt, an extrusion roller group, a finishing roller, a first heating device and a second heating device; wherein the first steel belt is driven by the driving wheel, the first driven wheel and the extrusion roller group; the second steel belt is driven by the second driven wheel, the third driven wheel and the extrusion roller group; the extrusion roller group includes at least one extrusion roller group, the extrusion roller is composed of two rollers with parallel axes and the upper roller can be adjusted up and down; the first steel belt and the second steel belt pass between each pair of rollers of the extrusion roller group; the first steel belt is located between the second steel belt and the second steel belt. The first steel strip is below the belt and the length of the first steel strip is greater than that of the second steel strip; the unloading port of the feeding bin is opposite to one end of the first steel strip; the finishing roller is located at the rear side of the driving wheel; a first heating device and a second heating device are arranged between the unloading port and the extrusion roller, the first heating device is arranged at the lower part of the first steel strip, and the second heating device is arranged at the upper part of the second steel strip, for heating the steel strips; the temperature of the first steel strip and the second steel strip is increased to 50-100°C, the gap width between the first steel strip and the second steel strip at the position of the extrusion roller group is adjusted, the flexible graphite paper calender is started, and the first steel strip and the second steel strip rotate towards each other; the premix is ​​conveyed to the first steel strip through the unloading port of the feeding bin and transmitted to the extrusion roller group with the movement of the first steel strip, extruded and calendered into sheets by the extrusion roller group, and then output through the finishing roller, dried, and the flexible graphite paper is obtained.

[0004] Although the above-mentioned prior art solution can achieve the effect of sheeting and precision pressing the mixed material by means of two upper and lower heatable steel belts in cooperation with the finishing roller, the shape of the graphite paper after calendering may be irregular, and it is not convenient to shape the edge of the graphite paper after forming, and the surplus material generated by the shaping is not convenient to return to the feeding end for continued use, and the graphite paper needs to be trimmed and shaped separately later, which reduces the preparation efficiency of the graphite paper.

[0005] In view of this, we propose a preparation method of flexible graphite paper and a calendering device thereof. Summary of the invention

[0006] The purpose of the present application is to provide a method for preparing flexible graphite paper and a calendering device thereof, which solves the technical problem of inconvenience in shaping the edges of graphite paper and recovering the residual materials, and achieves the technical effect of facilitating trimming the edges of graphite paper and recovering the residual materials after calendering.

[0007] The present application provides a calendering device for flexible graphite paper, comprising:

[0008] A calendering table, wherein a steel belt for conveying expanded graphite is arranged inside the calendering table, a pressing roller for compacting graphite is arranged on the top of the steel belt, and a material distribution rack for installing a feeding device is also fixedly arranged on the top of the calendering table;

[0009] Calendering rollers are used for calendering and flattening graphite paper; two groups of calendering rollers are provided, and each group of calendering rollers runs synchronously with the steel belt;

[0010] A trimming mechanism, disposed between the two groups of calendering rollers, for trimming the graphite paper;

[0011] The motor is fixedly arranged on the outside of the calendering table and is used to drive the calendering roller and the trimming mechanism to operate alternately and intermittently;

[0012] The recovery mechanism is arranged at the bottom of the steel belt and is used for receiving and recovering the residual material below the trimming mechanism. The recovery mechanism and the steel belt operate synchronously.

[0013] As an optional solution to the technical solution of the present application document, there are several pressing rollers, both ends of which are rotatably connected to the calendering table, the radius of the pressing roller gradually increases along the advancing direction of the steel strip, and support rollers are arranged on the inner side of the calendering table corresponding to the rotation of the pressing rollers. The support rollers are located directly below the corresponding pressing rollers, and the support rollers are tangentially arranged on the inner side of the steel strip. Heating devices are arranged on the inner side and the top of the calendering table, and the two heating devices are used to heat the steel strip and the pressing rollers, respectively.

[0014] As an optional solution to the technical solution of the present application document, two transmission rollers for driving the steel belt to run are rotatably arranged on the inner side of the calendering table, wherein one of the transmission rollers and the end of one of the support rollers are linked in the same direction through pulley A, one end of the pressure roller and the support roller are provided with gear A, the pressure roller and the support roller are linked in the opposite direction through two mutually meshing gears A, the other end of the support roller is fixedly provided with pulley B, and two adjacent support rollers are linked in the same direction through pulley B, and one of the transmission rollers rotates under the drive of the calendering roller.

[0015] As an optional solution to the technical solution of the present application document, a collecting box for collecting residual materials is fixedly arranged on the top of the calendering table on the side of the cloth rack away from the calendering roller, a slide plate is vertically slidably arranged on the side of the collecting box away from the cloth rack, a cover plate is horizontally slidably arranged on the top of the calendering table, and the collecting box is located at the unloading end of the recycling mechanism.

[0016] As an optional solution of the technical solution of the present application document, the recycling mechanism includes a belt and a top roller and a bottom roller for driving the belt to run, the top roller is located above the steel belt and is rotatably arranged with the calendering table, the bottom roller is located below the steel belt and is rotatably arranged with the calendering table, and the bottom roller is located below the calendering roller, and a tensioning roller is also rotatably arranged on the inner side of the calendering table, the top of the belt and the bottom of the steel belt are arranged at an acute angle, and the belt is attached to the outer side of the steel belt, and the recycling mechanism also includes a recycling box, which is fixedly arranged on the outer side of the calendering table and located at the bottom of the trimming mechanism, and the bottom of the recycling box is located at the top of the belt, the top roller and one of the drive rollers are reversely linked through a gear set, and a cleaning brush for cleaning the belt is fixedly arranged on the inner side of the collection box.

[0017] As an optional solution of the technical solution of the present application document, a crushing mechanism is arranged inside the recycling box, and the crushing mechanism includes two crushing rollers, and the two crushing rollers are rotatably arranged inside the recycling box, and two gears E that are meshed with each other are fixedly arranged at one end of the two crushing rollers, and a gear F is fixedly arranged at one end of one of the crushing rollers, and the gear F is meshed with the gear C at one end of the calendering roller, and the gear F rotates intermittently under the drive of the calendering roller, and a material guide plate is fixedly arranged at the bottom of the crushing roller inside the recycling box, and a grinding mechanism is arranged at the discharge port of the material guide plate inside the recycling box.

[0018] As an optional solution of the technical solution of the present application document, the grinding mechanism includes a crushing cylinder fixed at the discharge port of the guide plate, the crushing cylinder is fixedly arranged inside the recycling box, a screen plate is fixedly arranged on the inner side of the crushing cylinder, a rotating table is rotatably arranged on the top of the screen plate, a grinding wheel is arranged on the outer side of the rotating table, grinding teeth are fixedly arranged on the inner side of the crushing cylinder, a discharge port is opened on the outer side of the crushing cylinder at the bottom of the screen plate, and a high-speed motor for driving the rotating table to rotate is fixedly arranged at the bottom of the recycling box.

[0019] As an optional scheme of the technical scheme of the present application document, the two calendering rollers in each group are arranged in an upper and lower distribution, and the two calendering rollers are reversely linked through the gear B at the end. The calendering roller located at the top of one group is linked in the same direction with one of the calendering rollers through the pulley C at the end, and the calendering roller located at the bottom of the other group is linked in the same direction with the transmission roller through the pulley D, and the gear C is also fixedly provided on the end of the calendering roller; a gear block is fixedly provided on the driving end of the motor, and the gear block is meshed with the gear C. The motor is fixedly provided on the outside of the drying box, the drying box is located on the outside of the calendering roller, and the drying box is fixedly connected to the calendering table through a bracket.

[0020] As an optional solution to the technical solution of the present application document, the trimming mechanism includes an upper pressure plate and a lower pressure plate, both of which are slidably arranged on the outside of a limiting rod, and the limiting rod is fixedly arranged on the outside of a bracket, and upper blades and lower blades are symmetrically fixedly arranged on the sides of the upper pressure plate and the lower pressure plate close to each other, and the upper pressure plate and the lower pressure plate trigger the trimming action under the drive of a motor.

[0021] As an optional solution to the technical solution of the present application document, tooth plates A are fixedly provided on both sides of the upper pressure plate, and tooth plates B are fixedly provided on both sides of the lower pressure plate, a gear D is meshed between the tooth plates A and B on the same side, the gear D is rotatably provided on the outside of the bracket, the tooth plates A and B are centrally symmetrically provided with respect to the gear D, springs are symmetrically provided between the upper pressure plate and the lower pressure plate, the springs are all located on the outside of the limit rod, a shift block is fixedly provided on the outside of the upper pressure plate; a cam for driving the shift block to move is fixedly provided on the driving end of the motor.

[0022] The present application also provides a method for preparing flexible graphite paper, comprising the following steps:

[0023] S10, purifying, acid leaching, washing, drying and high-temperature expanding the graphite to obtain expanded graphite worms;

[0024] S20, pressing the expanded graphite worms into flexible graphite paper through the above-mentioned flexible graphite paper calendering equipment; specifically comprising the following steps:

[0025] S201, distributing the expanded graphite on the top of the steel belt through the feeding device on the top of the distribution frame, and the steel belt drives the expanded graphite to move to the bottom of the pressure roller under the drive of the motor, so that the synchronously running pressure roller compacts the expanded graphite;

[0026] S202, the compacted expanded graphite is calendered under the action of a first set of calendering rollers, so that the expanded graphite is calendered into a graphite paper of a certain thickness;

[0027] S203, at this time, the calendered graphite paper is in a flat state under the action of the two sets of calendering rollers, when the motor drives the steel belt to stop running, the calendering rollers stop rotating, and the motor drives the trimming mechanism to start trimming the two sides of the flat graphite paper;

[0028] S204, the motor drives the steel belt and the calendering roller again to transport the graphite paper forward by a certain length, and at the same time drives the recovery mechanism to recover the residual material generated by the trimming;

[0029] S205, the calendered and trimmed graphite paper is dried and output in a drying box.

[0030] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0031] (1) The present application uses a motor to drive the calendering roller and the trimming mechanism to operate intermittently and alternately, so that the calendering roller conveys the graphite paper for a certain distance and then the trimming mechanism automatically trims both sides, so as to facilitate trimming of both sides during the preparation process of the graphite paper. This effectively solves the problem of the inconvenience of shaping the edges of the graphite paper, thereby achieving the effect of facilitating trimming of the edges of the graphite paper after calendering.

[0032] (2) The present application provides a recovery mechanism at the bottom of the steel strip so that the recovery mechanism receives the residual material generated by the trimming mechanism and transports it to the collection box on the top of the calendering table for collection so as to facilitate subsequent use. This effectively solves the problem that the residual material of graphite paper is inconvenient to recycle, thereby achieving the effect of facilitating the recovery of residual material in the process of preparing graphite paper.

[0033] (3) The present application sets a crushing mechanism inside the recycling box so that the crushing mechanism crushes the residual materials produced by the trimming mechanism and then recycles them, so that the recycled residual materials can be reused, and the residual materials can be crushed and recycled in time to reduce the contamination of the residual materials.

[0034] (4) The present application sets a motor on the outer side of the calendering table to drive the calendering rollers to rotate, so that two groups of calendering rollers calender the graphite paper and keep the graphite paper in a flat state to facilitate trimming. When the calendering rollers rotate, they simultaneously drive the steel belt, pressure rollers, recovery mechanism and crushing mechanism to operate, so that the graphite paper is not affected during trimming.

[0035] (5) The present application sets a motor as a power source. During operation, it is only necessary to control the motor to run at a constant speed, making the calendering equipment more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic structural diagram of one side of a calendering device for flexible graphite paper disclosed in a preferred embodiment of the present application;

[0037] Figure 2 A schematic structural diagram of the other side of a calendering device for flexible graphite paper disclosed in a preferred embodiment of the present application;

[0038] Figure 3 This is a schematic diagram of the assembly structure of a pressing roller in a calendering device for flexible graphite paper disclosed in a preferred embodiment of the present application;

[0039] Figure 4 A schematic cross-sectional view of a calendering device for flexible graphite paper disclosed in a preferred embodiment of the present application;

[0040] Figure 5 This is a schematic diagram of the assembly structure of the steel belt and the belt in the calendering equipment for flexible graphite paper disclosed in a preferred embodiment of the present application;

[0041] Figure 6 A schematic diagram of the structure of a calendering roller in a calendering device for a flexible graphite paper disclosed in a preferred embodiment of the present application;

[0042] Figure 7 A schematic diagram of the internal structure of a recovery box in a calendering device for flexible graphite paper disclosed in a preferred embodiment of the present application;

[0043] Figure 8 This is a schematic structural diagram of a trimming mechanism in a calendering device for flexible graphite paper disclosed in a preferred embodiment of the present application;

[0044] Fig. 9 This is a schematic structural diagram of a crushing mechanism in a calendering device for flexible graphite paper disclosed in a preferred embodiment of the present application;

[0045] Description of the numbers in the figure:

[0046] 1. Calendering table; 11. Steel belt; 12. Pressing roller; 13. Fabric rack; 14. Support roller; 15. Gear A; 16. Transmission roller; 17. Pulley A; 18. Pulley B; 19. Heating device; 110. Collecting box; 111. Slide plate; 112. Cover plate; 113. Drying box; 114. Cleaning brush; 115. Bracket; 116. Limit rod;

[0047] 2. Calendering roller; 21. Gear B; 22. Pulley C; 23. Pulley D; 24. Gear C;

[0048] 3. Trimming mechanism; 31. Upper pressure plate; 32. Lower pressure plate; 33. Upper blade; 34. Lower blade; 35. Tooth plate A; 36. Tooth plate B; 37. Gear D; 38. Spring; 39. Shifting block;

[0049] 4. Motor; 41. Gear block; 42. Cam;

[0050] 5. Recovery mechanism; 51. Belt; 52. Top roller; 53. Bottom roller; 54. Tension roller; 55. Recovery box; 56. Gear set;

[0051] 6. Crushing mechanism; 61. Crushing roller; 62. Gear E; 63. Gear F; 64. Guide plate; 65. Crushing cylinder; 66. Screen plate; 67. Rotating table; 68. Grinding wheel; 69. Grinding teeth; 610. Feeding port; 611. High-speed motor. DETAILED DESCRIPTION

[0052] The present application is further described in detail below in conjunction with the accompanying drawings.

[0053] Reference Figure 1-Figure 5 The embodiment of the present application discloses a calendering device for flexible graphite paper, including a calendering table 1, a steel belt 11 is driven and running inside the calendering table 1, a synchronously running pressing roller 12 is arranged on the top of the steel belt 11, a cloth rack 13 for installing a feeding device is fixedly arranged on the top of the calendering table 1, two groups of calendering rollers 2 are arranged on one side of the calendering table 1 located in the forward direction of the steel belt 11, the two groups of calendering rollers 2 run synchronously with the steel belt 11, a trimming mechanism 3 is arranged between the two groups of calendering rollers 2, a recovery mechanism 5 is arranged at the bottom of the steel belt 11, and a motor 4 for driving the steel belt 11 and the trimming mechanism 3 to run intermittently is fixedly arranged on the outside of the calendering table 1, and the motor 4 drives the recovery mechanism 5 to recover the residual material.

[0054] The expanded graphite is distributed on the top of the steel belt 11 through the feeding device on the top of the distribution frame 13. When driven by the motor 4, the steel belt 11 drives the expanded graphite to move to the bottom of the pressure roller 12, so that the synchronously running pressure roller 12 compacts the expanded graphite. The compacted expanded graphite is calendered under the action of the first group of calendering rollers 2, so that the expanded graphite is calendered into a graphite paper of a certain thickness. At this time, the calendered graphite paper is in a flat state under the action of the two groups of calendering rollers 2. When the motor 4 drives the steel belt 11 to stop running, the calendering rollers 2 stop rotating, and the motor 4 drives the trimming mechanism 3 to start trimming the two sides of the flat graphite paper. Then the motor 4 drives the steel belt 11 and the calendering rollers 2 again to convey the graphite paper forward for a certain length, and at the same time drives the recovery mechanism 5 to recover the residual material generated by the trimming, so as to facilitate shaping in the graphite paper preparation process and to facilitate the recovery of the residual material generated by the shaping.

[0055] In order to realize the rolling of graphite by the steel strip 11 and the pressure roller 12, refer to Figure 3 and Figure 4There are several pressing rollers 12, both ends of the pressing rollers 12 are rotatably connected to the calendering table 1, the radius of the pressing rollers 12 gradually increases along the advancing direction of the steel strip 11, and support rollers 14 are provided on the inner side of the calendering table 1 corresponding to the rotation of the pressing rollers 12. The support rollers 14 are located directly below the corresponding pressing rollers 12, and the support rollers 14 are tangentially arranged on the inner side of the steel strip 11. Heating devices 19 are provided on the inner side and the top of the calendering table 1, and the two heating devices 19 are used to heat the steel strip 11 and the pressing rollers 12 respectively.

[0056] When the steel belt 11 conveys the graphite to the pressing roller 12, as the radius of the pressing roller 12 gradually increases, the compaction gap between the pressing roller 12 and the steel belt 11 gradually decreases, so that the graphite is compacted step by step for preliminary rolling, and the steel belt 11 and the pressing roller 12 are heated by the heating device 19, which is conducive to the rapid shaping of the expanded graphite and facilitates the subsequent fine pressing of the calendering roller 2 and the trimming of both sides.

[0057] In order to realize the synchronous operation function of the steel belt 11 and the pressure roller 12, refer to Figure 1-Figure 5 Two transmission rollers 16 for driving the steel belt 11 to run are rotatably arranged on the inner side of the calendering table 1, one of the transmission rollers 16 and the end of one of the support rollers 14 are linked in the same direction through a pulley A17, one end of the pressure roller 12 and the support roller 14 are provided with a gear A15, the pressure roller 12 and the support roller 14 are linked in the opposite direction through two mutually meshing gears A15, the other end of the support roller 14 is fixedly provided with a pulley B18, and two adjacent support rollers 14 are linked in the same direction through the pulley B18, and one of the transmission rollers 16 rotates under the drive of the calendering roller 2.

[0058] When the calendering roller 2 rotates under the drive of the motor 4, the calendering roller 2 synchronously drives the transmission roller 16 to rotate, so that the transmission roller 16 drives the steel belt 11 to transport the graphite on the top. At this time, the transmission roller 16 drives the support roller 14 to rotate in the same direction through the pulley A17, and the support roller 14 drives the pressure roller 12 to rotate in the opposite direction through the gear A15, so that the pressure roller 12 can cooperate with the steel belt 11 to compact the graphite and run synchronously with the steel belt 11.

[0059] In order to facilitate the use of recycled waste materials, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A collecting box 110 for collecting residual materials is fixedly provided on the top of the calendering table 1 on the side of the cloth rack 13 away from the calendering roller 2. A slide plate 111 is vertically slidably provided on the side of the collecting box 110 away from the cloth rack 13. A cover plate 112 is horizontally slidably provided on the top of the calendering table 1. The collecting box 110 is located at the unloading end of the recycling mechanism 5.

[0060] The collecting box 110 is provided to collect the residual material recovered by the recovery mechanism 5. When the residual material is to be used again, the mixed solvent can be added to the graphite residual material in the collecting box 110 for uniform mixing, so that the expanded graphite residual material maintains a certain humidity. Then the slide plate 111 is pulled out to release the isolation between the collecting box 110 and the distribution rack 13, so that the recovered residual material in the collecting box 110 can move to the bottom of the distribution rack 13 under the conveyance of the steel belt 11 so as to be mixed with the expanded graphite output by the feeding equipment. The cover plate 112 is used to protect the collecting box 110 during the recycling process to prevent serious pollution to the recycled graphite.

[0061] In order to realize that the recycling mechanism 5 recycles the residual material below the trimming mechanism 3 into the collecting box 110, refer to Figure 3 , Figure 4 and Figure 5 The recycling mechanism 5 includes a belt 51 and a top roller 52 and a bottom roller 53 for driving the belt 51 to run. The top roller 52 is located above the steel belt 11 and is rotatably arranged with the calendering table 1. The bottom roller 53 is located below the steel belt 11 and is rotatably arranged with the calendering table 1. The bottom roller 53 is located below the calendering roller 2. A tensioning roller 54 is also rotatably arranged on the inner side of the calendering table 1. The top of the belt 51 and the bottom of the steel belt 11 are arranged at an acute angle. The belt 51 is attached to the outer side of the steel belt 11. The recycling mechanism 5 also includes a recycling box 55. The recycling box 55 is fixedly arranged on the outer side of the calendering table 1 and is located at the bottom of the trimming mechanism 3. The bottom of the recycling box 55 is located at the top of the belt 51. The top roller 52 and one of the driving rollers 16 are reversely linked through a gear set 56. A cleaning brush 114 for cleaning the belt 51 is fixedly arranged on the inner side of the collection box 110.

[0062] When the transmission roller 16 drives the steel belt 11 to run, the transmission roller 16 drives the top roller 52 to rotate in the opposite direction through the gear set 56, so that the top roller 52 drives the belt 51 to transmit in the opposite direction on the outside of the steel belt 11. At this time, the recovery box 55 receives the residual material from the trimming mechanism 3 and guides it to the top of the belt 51. Under the conveyance of the belt 51, it gradually approaches the bottom of the steel belt 11 until the belt 51 and the steel belt 11 clamp the expected material and convey it upward. When the expected material is at the top of the steel belt 11, the belt 51 assembly releases the clamping of the expected material, so that the expected material automatically falls on the top of the steel belt 11 and is collected under the action of the collection box 110. At the same time, the belt 51 is cleaned by the cleaning brush 114 on the inside of the collection box 110 to prevent the expected material from being brought out of the collection box 110.

[0063] In order to facilitate the processing of the remaining materials, refer to Figure 4 , Figure 6 , Figure 7 and Fig. 9A crushing mechanism 6 is arranged inside the recovery box 55, and the crushing mechanism 6 includes two crushing rollers 61. The two crushing rollers 61 are rotatably arranged inside the recovery box 55, and two gears E62 that are meshed with each other are fixedly arranged at one end of the two crushing rollers 61. A gear F63 is fixedly arranged at one end of one of the crushing rollers 61, and the gear F63 is meshed with the gear C24 at one end of the calendering roller 2. The gear F63 rotates intermittently under the drive of the calendering roller 2, and a guide plate 64 is fixedly arranged at the bottom of the crushing roller 61 inside the recovery box 55, and a grinding mechanism is arranged at the discharge port of the guide plate 64 inside the recovery box 55.

[0064] When the calendering roller 2 rotates, the gear C24 drives the gear F63 to rotate, so that the gear F63 drives one of the crushing rollers 61 to rotate, and the crushing roller 61 drives the other crushing roller 61 to rotate in the opposite direction synchronously through the gear E62 at the end. The residual material produced by the trimming mechanism 3 is initially crushed by the two crushing rollers 61, and the crushed residual material is input into the grinding mechanism for grinding under the action of the guide plate 64, so that the residual material after grinding is recovered into the inside of the collection box 110 for collection, so that it can be directly taken out when used.

[0065] In order to realize the grinding function of the recycled residual material, refer to Figure 5 , Figure 7 and Fig. 9 The grinding mechanism includes a crushing cylinder 65 fixed at the discharge port of the guide plate 64, the crushing cylinder 65 is fixedly arranged inside the recovery box 55, a sieve plate 66 is fixedly arranged on the inner side of the crushing cylinder 65, a rotating table 67 is rotatably arranged on the top of the sieve plate 66, a grinding wheel 68 is arranged on the outer side of the rotating table 67, grinding teeth 69 are fixedly arranged on the inner side of the crushing cylinder 65, a discharge port 610 is opened on the outer side of the crushing cylinder 65 at the bottom of the sieve plate 66, and a high-speed motor 611 for driving the rotating table 67 to rotate is fixedly arranged at the bottom of the recovery box 55.

[0066] The high-speed motor 611 drives the rotating table 67 to rotate on the top of the screen plate 66, so that the rotating table 67 drives the grinding wheel 68 to rotate. During the rotation of the grinding wheel 68, the grinding teeth 69 are used to grind the residual materials that are initially crushed. The residual materials after grinding pass through the screen plate 66 and fall to the lower part of the crushing cylinder 65. Finally, they are transported to the top of the belt 51 for recycling under the action of the recovery box 55.

[0067] In order to realize the driving function of the motor 4 to the calender roller 2, refer to Figure 2 , Figure 6 and Figure 7The two calendering rollers 2 in each group are arranged in an upper and lower distribution, and the two calendering rollers 2 are reversely linked through the gear B21 at the end. The calendering roller 2 located at the top of one group is linked in the same direction with one of the calendering rollers 12 through the pulley C22 at the end, and the calendering roller 2 located at the bottom of the other group is linked in the same direction with the driving roller 16 through the pulley D23, and the end of the calendering roller 2 is also fixedly provided with a gear C24; the driving end of the motor 4 is fixedly provided with a gear block 41, and the gear block 41 is meshed with the gear C24. The motor 4 is fixedly arranged on the outside of the drying box 113, the drying box 113 is located on the outside of the calendering roller 2, and the drying box 113 is fixedly connected to the calendering table 1 through the bracket 115.

[0068] When the motor 4 drives the gear C24 to rotate through the tooth block 41, the gear C24 drives one of the calendering rollers 2 to rotate, so that the calendering roller 2 drives the upper gear B21 to rotate through the gear B21 at the end, so as to achieve the calendering effect on the graphite paper, and the gear C24 drives one of the transmission rollers 16 to rotate through the pulley D23, so that the transmission roller 16 drives the steel belt 11, the pressure roller 12 and the recovery mechanism 5 to operate, and the pressure roller 12 drives the calendering roller 2 located above in the other group to rotate through the pulley C22, so that the two groups of calendering rollers 2 operate synchronously to calender and convey the graphite paper, and the conveyed graphite paper is trimmed by the trimming mechanism 3 and then dried and discharged through the drying box 113.

[0069] In order to realize the trimming function of the trimming mechanism 3 on the graphite paper, refer to Figure 6 , Figure 7 and Figure 8 The trimming mechanism 3 includes an upper pressing plate 31 and a lower pressing plate 32. The upper pressing plate 31 and the lower pressing plate 32 are both slidably arranged on the outside of the limit rod 116. The limit rod 116 is fixedly arranged on the outside of the bracket 115. The upper blade 33 and the lower blade 34 are symmetrically fixedly arranged on the side where the upper pressing plate 31 and the lower pressing plate 32 are close to each other. The upper pressing plate 31 and the lower pressing plate 32 trigger the trimming action under the drive of the motor 4.

[0070] By slidingly setting an upper pressing plate 31 and a lower pressing plate 32 on the outside of the limiting rod 116 to drive the upper blade 33 and the lower blade 34 to cut the graphite paper respectively, the graphite paper can be trimmed during the calendering process, and the residual material generated by the trimming can be directly recovered by the recovery mechanism 5 below, thereby improving the preparation efficiency of the graphite paper.

[0071] In order to realize the driving function of the motor 4 on the trimming mechanism 3, refer to Figure 6 and Figure 8, tooth plates A35 are fixedly provided on both sides of the upper pressure plate 31, tooth plates B36 are fixedly provided on both sides of the lower pressure plate 32, a gear D37 is meshed between the tooth plates A35 and B36 on the same side, the gear D37 is rotatably provided on the outside of the bracket 115, the tooth plates A35 and B36 are centrally symmetrically provided about the gear D37, springs 38 are symmetrically provided between the upper pressure plate 31 and the lower pressure plate 32, the springs 38 are all located on the outside of the limit rod 116, a shift block 39 is fixedly provided on the outside of the upper pressure plate 31; a cam 42 for driving the shift block 39 to move is fixedly provided on the driving end of the motor 4.

[0072] When the motor 4 drives the tooth block 41 to mesh with the gear C24, the motor 4 can synchronously drive the steel belt 11, the pressure roller 12 and the recovery mechanism 5 to operate. When the tooth block 41 is disengaged from the gear C24, the graphite paper is stopped from being conveyed. At this time, the motor 4 continues to drive the cam 42 to push the shift block 39, so that the shift block 39 drives the upper pressure plate 31 to slide downward, and the upper pressure plate 31 drives the gear D37 to move upward through the tooth plate A35 and the gear D37, so that the upper pressure plate 31 and the lower pressure plate 32 respectively drive the upper blade 33 and the lower blade 34 to cut and trim the two sides of the graphite paper. When the cam 42 is disengaged from the shift block 39, the spring 38 pushes the upper pressure plate 31 and the lower pressure plate 32 to automatically reset. At this time, the tooth block 41 is meshed with the gear C24 again, so that the trimmed graphite paper continues to be conveyed forward for a certain length. By analogy, the graphite paper can be automatically trimmed during the calendering process.

[0073] In summary, when the calendering device for flexible graphite paper disclosed in the embodiment of the present application is used, the expanded graphite is distributed on the top of the steel belt 11 through the feeding device on the top of the cloth frame 13, and the motor 4 is started to drive the tooth block 41 and the cam 42 to rotate, so that the tooth block 41 drives the gear C24 to rotate, and the gear C24 drives one of the calendering rollers 2 to rotate, so that the calendering roller 2 drives the upper gear B21 to rotate through the gear B21 at the end, so as to achieve the calendering effect on the graphite paper, and the gear C24 drives one of the transmission rollers 16 to rotate through the pulley D23, so that the transmission roller 16 drives the steel belt 11 to run, so that the steel belt 11 drives the expanded graphite to move to the bottom of the pressure roller 12, and at the same time, the transmission roller 16 drives the same direction through the pulley A17. The movable support roller 14 rotates, and the support roller 14 drives the pressure roller 12 to rotate in the opposite direction through the gear A15, so that the pressure roller 12 can cooperate with the steel belt 11 to compact the graphite, and then the graphite paper is calendered by two sets of calender rollers 2. At this time, the calendered graphite paper is in a flat state under the action of the two sets of calender rollers 2. When the tooth block 41 is out of engagement with the gear C24, the graphite paper is stopped from being transported. At this time, the motor 4 continues to drive the cam 42 to push the shift block 39, so that the shift block 39 drives the upper pressure plate 31 to slide downward, so that the upper pressure plate 31 drives the gear D37 to move upward through the tooth plate A35 and the gear D37, and then the upper pressure plate 31 and the lower pressure plate 32 respectively drive the upper blade 33 and the lower blade 34 to cut and trim the two sides of the graphite paper. When the cam 42 After the shift block 39 is disengaged, the spring 38 pushes the upper pressing plate 31 and the lower pressing plate 32 to automatically reset. At this time, the tooth block 41 meshes with the gear C24 again, so that the trimmed graphite paper continues to be transported forward for a certain length. By analogy, the graphite paper can be automatically trimmed during the calendering process. When the calendering roller 2 rotates, the gear C24 drives the gear F63 to rotate, so that the gear F63 drives one of the crushing rollers 61 to rotate, and the crushing roller 61 drives the other crushing roller 61 to rotate in the opposite direction synchronously through the gear E62 at the end. The residual material generated by the trimming mechanism 3 is preliminarily crushed by the two crushing rollers 61. The crushed residual material is input into the grinding mechanism for grinding under the action of the guide plate 64. The ground residual material passes through the sieve plate 6 6 falls on the lower part of the crushing cylinder 65, and is finally transported to the top of the belt 51 under the action of the recovery box 55; at this time, when the transmission roller 16 drives the steel belt 11 to drive, the transmission roller 16 drives the top roller 52 to rotate in the opposite direction through the gear set 56, so that the top roller 52 drives the belt 51 to drive in the opposite direction on the outside of the steel belt 11. At this time, the recovery box 55 receives the residual material of the trimming mechanism 3 and guides it to the top of the belt 51. Under the conveyance of the belt 51, it gradually approaches the bottom of the steel belt 11 until the belt 51 and the steel belt 11 clamp the expected material and transport it upward. When the expected material is at the top of the steel belt 11, the belt 51 component releases the clamping of the expected material, so that the expected material automatically falls on the top of the steel belt 11 and is collected under the action of the collection box 110.

[0074] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0077] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0078] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A calendering device for flexible graphite paper, characterized in that: Include: A calendering table (1), wherein a steel belt (11) for conveying expanded graphite is arranged inside the calendering table (1), a pressing roller (12) for compacting graphite is arranged on the top of the steel belt (11), and a material distribution rack (13) for installing a feeding device is also fixedly arranged on the top of the calendering table (1); Calendering rollers (2) are used for calendering and flattening graphite paper; two groups of calendering rollers (2) are provided, and each group of calendering rollers (2) runs synchronously with the steel belt (11); A trimming mechanism (3) is disposed between the two groups of calender rollers (2) and is used for trimming the graphite paper; A recovery mechanism (5) is arranged at the bottom of the steel belt (11) and is used to receive and recover the residual material below the trimming mechanism (3); the recovery mechanism (5) and the steel belt (11) operate synchronously; Two drive rollers (16) for driving the steel belt (11) to run are rotatably arranged inside the calendering table (1), wherein one of the drive rollers (16) and the end of one of the support rollers (14) are linked in the same direction via a pulley A (17); One end of each of the pressure roller (12) and the support roller (14) is provided with a gear A (15), and the pressure roller (12) and the support roller (14) are linked in reverse directions via two mutually meshing gears A (15); The other ends of the support rollers (14) are fixedly provided with pulleys B (18), and two adjacent support rollers (14) are linked in the same direction via the pulleys B (18), and one of the drive rollers (16) rotates under the drive of the calendering roller (2); The two calendering rollers (2) in each group are arranged in an upper and lower distribution, and the two calendering rollers (2) are reversely linked via gears B (21) at the ends; The calendering roller (2) located at the top of one of the groups is linked in the same direction with one of the pressing rollers (12) via a pulley C (22) at the end; The calendering roller (2) located at the bottom of the other group is linked in the same direction with the driving roller (16) via a pulley D (23), and a gear C (24) is fixedly provided at the end of the calendering roller (2); A gear block (41) is fixedly provided at the driving end of the motor (4), the gear block (41) being meshedly connected with the gear C (24), the motor (4) being fixedly provided on the outside of a drying box (113), the drying box (113) being located on the outside of the calendering roller (2), and the drying box (113) being fixedly connected to the calendering table (1) via a bracket (115); The trimming mechanism (3) comprises an upper pressing plate (31) and a lower pressing plate (32), wherein the upper pressing plate (31) and the lower pressing plate (32) are both slidably arranged on the outside of the limiting rod (116); The limit rod (116) is fixedly arranged on the outside of the bracket (115); an upper blade (33) and a lower blade (34) are symmetrically fixedly arranged on the side where the upper pressing plate (31) and the lower pressing plate (32) are close to each other; the upper pressing plate (31) and the lower pressing plate (32) trigger the trimming action under the drive of the motor (4); Tooth plates A (35) are fixedly provided on both sides of the upper pressing plate (31), tooth plates B (36) are fixedly provided on both sides of the lower pressing plate (32), and a gear D (37) is meshed between the tooth plates A (35) and B (36) on the same side; The gear D (37) is rotatably disposed outside the bracket (115), and the tooth plate A (35) and the tooth plate B (36) are centrally symmetrically disposed about the gear D (37); Springs (38) are symmetrically arranged between the upper pressing plate (31) and the lower pressing plate (32), and the springs (38) are all located outside the limiting rod (116). A shifting block (39) is fixedly arranged outside the upper pressing plate (31); and a cam (42) for driving the shifting block (39) to move is fixedly arranged at the driving end of the motor (4).

2. The calendering device for flexible graphite paper according to claim 1, characterized in that: A plurality of pressing rollers (12) are provided, and both ends of the pressing rollers (12) are rotatably connected to the calendering table (1), and the radius of the pressing rollers (12) gradually increases along the advancing direction of the steel strip (11); A support roller (14) is rotatably arranged on the inner side of the calendering table (1) corresponding to the pressure roller (12), the support roller (14) is located directly below the corresponding pressure roller (12), and the support roller (14) is tangentially arranged on the inner side of the steel strip (11); Heating devices (19) are provided on the inner side and the top of the calendering table (1), and the two heating devices (19) are used to heat the steel strip (11) and the pressing roller (12) respectively.

3. The calendering device for flexible graphite paper according to claim 2, characterized in that: A collecting box (110) for collecting residual materials is fixedly arranged on the top of the calendering table (1) and located on a side of the material distribution frame (13) away from the calendering roller (2); a cover plate (112) is horizontally slidably arranged on the top of the calendering table (1), and the collecting box (110) is located at the unloading end of the recycling mechanism (5); A slide plate (111) is vertically slidably provided on one side of the collection box (110) away from the material distribution rack (13).

4. The calendering device for flexible graphite paper according to claim 3, characterized in that: The recovery mechanism (5) comprises a belt (51) and a top roller (52) and a bottom roller (53) for driving the belt (51) to operate; The top roller (52) is located above the steel strip (11) and is rotatably arranged with the calendering table (1), the bottom roller (53) is located below the steel strip (11) and is rotatably arranged with the calendering table (1), and the bottom roller (53) is located below the calendering roller (2); A tensioning roller (54) is rotatably arranged on the inner side of the calendering table (1), the top of the belt (51) and the bottom of the steel belt (11) are arranged at an acute angle, and the belt (51) is attached to the outer side of the steel belt (11); The recycling mechanism (5) further comprises a recycling box (55), wherein the recycling box (55) is fixedly arranged outside the calendering table (1) and located at the bottom of the trimming mechanism (3), the bottom of the recycling box (55) is located at the top of the belt (51), the top roller (52) and one of the driving rollers (16) are reversely linked via a gear set (56), and a cleaning brush (114) for cleaning the belt (51) is fixedly arranged inside the collection box (110).

5. The calendering device for flexible graphite paper according to claim 4, characterized in that: A crushing mechanism (6) is provided inside the recovery box (55); The pulverizing mechanism (6) comprises two crushing rollers (61), the two crushing rollers (61) are rotatably arranged inside the recovery box (55), two mutually meshing gears E (62) are fixedly arranged at one end of the two crushing rollers (61), and a gear F (63) is fixedly arranged at one end of one of the crushing rollers (61); The gear F (63) is meshed with the gear C (24) at one end of the calendering roller (2), and the gear F (63) rotates intermittently under the drive of the calendering roller (2); A material guide plate (64) is fixedly arranged inside the recovery box (55) at the bottom of the crushing roller (61), and a grinding mechanism is arranged inside the recovery box (55) at the material outlet of the material guide plate (64).

6. The calendering device for flexible graphite paper according to claim 5, characterized in that: The grinding mechanism comprises a grinding cylinder (65) fixed at the material outlet of the material guide plate (64); the grinding cylinder (65) is fixedly arranged inside the recovery box (55); A sieve plate (66) is fixedly disposed on the inner side of the pulverizing cylinder (65); a rotating platform (67) is rotatably disposed on the top of the sieve plate (66); a grinding wheel (68) is disposed on the outer side of the rotating platform (67); and grinding teeth (69) are fixedly disposed on the inner side of the pulverizing cylinder (65); A material discharge port (610) is provided on the outside of the pulverizing cylinder (65) at the bottom of the sieve plate (66), and a high-speed motor (611) for driving the rotating platform (67) to rotate is fixedly provided at the bottom of the recovery box (55).

7. A method for preparing flexible graphite paper, characterized in that: The following steps are involved: S10, purifying, acid leaching, washing, drying and high-temperature expanding the graphite to obtain expanded graphite worms; S20, pressing the expanded graphite worms into flexible graphite paper through the calendering equipment of any one of claims 1 to 6; specifically comprising the following steps: S201, distributing the expanded graphite on the top of the steel belt (11) through the feeding device on the top of the distribution frame (13), and the steel belt (11) drives the expanded graphite to move toward the bottom of the pressure roller (12) under the drive of the motor (4), so that the synchronously running pressure roller (12) compacts the expanded graphite; S202, the compacted expanded graphite is calendered under the action of the first set of calendering rollers (2), so that the expanded graphite is calendered into graphite paper of a certain thickness; S203, at this time, the calendered graphite paper is in a flat state under the action of the two sets of calendering rollers (2), when the motor (4) drives the steel belt (11) to stop running, the calendering rollers (2) stop rotating, and the motor (4) drives the trimming mechanism (3) to start trimming both sides of the flat graphite paper; S204, the motor (4) drives the steel belt (11) and the calender roller (2) again to transport the graphite paper forward by a certain length, and at the same time drives the recovery mechanism (5) to recover the residual material generated by the trimming; S205, the calendered and trimmed graphite paper is dried and output in a drying box (113).

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