A granulation apparatus for carbon nanotubes

Abstract

The utility model provides a kind of for carbon nanotube's granulating equipment, including bearing box, the upside of bearing box is provided with extrusion cylinder, multiple heating wires are provided in the interlayer inside extrusion cylinder, the inside rotation of extrusion cylinder is provided with screw rod, the right side of extrusion cylinder is provided with granulating mould, the upside of bearing box is provided with rotating seat, the inside rotation of rotating seat is provided with connecting frame, the downside of connecting frame is provided with mounting frame board, the inside rotation of mounting frame board is provided with the rotary cutter compatible with granulating mould by rotating column. By the granulating equipment for carbon nanotube of the utility model, the cutting device can be quickly separated from the opposite side of the granulating mould without tools, without shielding the granulating mould, so that the granulating mould and the cutter can be quickly and conveniently cleaned by personnel, thereby significantly shortening the downtime, reducing the risk of human damage, and improving the cleaning convenience of the granulating equipment.

Description

Technical Field

[0001] This utility model belongs to the field of carbon nanotube production technology, and specifically relates to a granulation device for carbon nanotubes. Background Technology

[0002] Carbon nanotube granulation equipment is a specialized device that processes loose, easily airborne, and poorly flowing carbon nanotube powder into granules. Common types include extrusion granulators, roller press granulators, and spray drying equipment. Granulation is necessary because raw carbon nanotubes are extremely prone to agglomeration and dispersion, making them difficult to weigh and transport, and posing dust pollution and health risks. At the same time, their poor flowability also makes it difficult to disperse evenly in applications such as battery electrodes and composite materials. Granulation can increase density, reduce dust, improve flowability and operability, and help carbon nanotubes disperse more evenly in subsequent processes, thereby improving product performance and production efficiency.

[0003] Existing granulation equipment for carbon nanotubes generally adopts an extrusion structure. The working process involves feeding carbon nanotube powder (usually mixed with a small amount of binder such as PVDF, PE, or solvent to improve formability) into a heated extrusion chamber. Under temperature control of 160°C to 250°C, the material undergoes melting, shearing, homogenization, and compaction within the chamber through the rotating and pushing action of the screw. It is then continuously extruded through micropores on the die head to form strips. The strips are then cut into uniform particles by a pelletizing device located on the opposite side of the die head. However, because the cutter must maintain a very small gap with the die surface to achieve precise and neat cutting, the pelletizing device is often rigidly fixed next to the die. This means that after each granulation, the operator must use tools such as wrenches to disassemble and remove the entire device to clean the die holes and blades separately. This process is not only cumbersome and time-consuming, but also prone to relative positional shifts between the cutter and the die surface and wear on the cutting edge due to frequent disassembly and assembly. Utility Model Content

[0004] In view of this, this utility model addresses the shortcomings of the prior art by providing a granulation device for carbon nanotubes. The granulation device can be quickly removed from the opposite side of the granulation mold without tools, without obstructing the granulation mold. This allows for quick and easy cleaning of the granulation mold and the cutter, thereby significantly reducing downtime, minimizing the risk of human-caused damage, and improving the ease of cleaning the granulation equipment.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a granulation device for carbon nanotubes, including a carrier box, an extrusion cylinder is provided on the upper side of the carrier box, multiple heating wires are provided in the interlayer inside the extrusion cylinder, a screw is rotatably provided inside the extrusion cylinder, a granulation mold is provided on the right side of the extrusion cylinder, a rotating seat is provided on the upper side of the carrier box, a connecting frame is rotatably provided inside the rotating seat, a mounting frame plate is provided on the lower side of the connecting frame, a rotating cutter adapted to the granulation mold is rotatably provided inside the mounting frame plate via a rotating column, a second motor is provided inside the mounting frame plate, the output shaft of the second motor is connected to the right end of the rotating column via a coupling, a support and fixing assembly for the connecting frame is provided on the upper side of the granulation mold, the support and fixing assembly includes a right fixing seat provided on the granulation mold, a threaded hole opened inside the right fixing seat is internally threaded to a stud, the stud is inserted into a locking hole opened inside the connecting frame, a knob is provided on the front side of the stud, and a left fixing seat adapted to the inside of the connecting frame is also provided on the upper side of the carrier box.

[0006] As a further improvement of this utility model, a feeding box is provided at the feeding port on the upper side of the bearing box. Multiple dispersing blades are rotatably arranged inside the feeding box. Each dispersing blade is equipped with a gear at its front end. Two gears are meshed and connected to each other. A protective box is provided on the front side of the bearing box. Both gears are located inside the protective box. A motor is provided on the rear side of the bearing box. The output shaft of the motor is connected to the rear end of the dispersing blade located on the left side through a coupling.

[0007] As a further improvement of this utility model, a handle is provided on the front side of the connecting frame, and the connecting frame and the handle are fixed together by welding.

[0008] As a further improvement of this utility model, a motor is provided on the left side of the extrusion cylinder, and the output shaft of the motor is connected to the left end of the screw through a coupling.

[0009] As a further improvement of this utility model, protective plates are provided on the front and rear sides of the mounting frame, and the mounting frame and the protective plates are fixed together by welding.

[0010] As a further improvement of this utility model, a cooling water ring is provided on the outer arc surface of the extrusion cylinder.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: Firstly, the heating cylinder is preheated to the set temperature by heating wires, and a cooling water ring is connected to an external circulating cooling system. Then, carbon nanotube powder and a small amount of binder are added to the feed box in proportion. Motor 1 is started to drive the screw to rotate, so that the material melts, shears, mixes and is conveyed forward in the extrusion chamber. After the melt is precisely cooled by the cooling water ring, the viscosity tends to stabilize. Then, it is extruded into uniform strips through the micropores of the granulation mold. At the same time, Motor 2 drives the rotating cutter to cut it into granules. During this process, the screw is inserted into the locking hole of the connecting frame, which forms a reliable mechanical limit on the connecting frame. This effectively prevents the connecting frame from rotating unexpectedly due to vibration or torque transmission generated during the operation of Motor 2. This ensures that the relative position between the cutter and the mold always remains accurate and stable, avoiding uneven granulation, stringing, hole blockage or even equipment damage caused by deviation. This significantly improves granulation consistency, operational safety and long-term equipment reliability.

[0012] Secondly, by setting protective plates on both sides of the rotating cutter, the cut carbon nanotube particles can be effectively prevented from splashing or accumulating on the second motor and its transmission components during the pelletizing process, thus preventing them from penetrating into the second motor and causing short circuits, insulation failures, or bearing contamination, thereby ensuring the cleanliness and normal heat dissipation of the second motor.

[0013] Third, after pelleting is complete, rotate the knob counterclockwise to disengage the screw from the screw hole of the right fixed seat and the locking hole of the connecting frame. Then, grasp the handle and use the hinge structure of the rotating seat to rotate the connecting frame 180 degrees and accurately drop it into the left fixed seat. This allows the rotating cutter to quickly move away from the outer side of the pelleting mold, thus fully exposing the mold surface and the working area of ​​the cutter. At this point, personnel can directly use a scraper to efficiently clean the carbon nanotube raw materials adhering to both without disassembling tools or adjusting the equipment structure. This not only significantly shortens downtime for cleaning and avoids hardening and clogging of the mold holes by residual materials, but also prevents positioning deviations and mechanical damage caused by repeated disassembly and assembly, significantly improving cleaning convenience, maintenance efficiency, and the accuracy and stability of subsequent pelleting.

[0014] Fourth, when adding carbon nanotube powder into the feed box, the motor is started to drive the left dispersing blade column and gear to rotate, and through gear meshing, it synchronously drives the right dispersing blade column to rotate in the opposite direction, so that the two blade columns rotate towards each other, which can efficiently shear and disperse the carbon nanotube powder. This can effectively break the agglomerates formed by the static electricity of carbon nanotubes, making them fully loose and uniform, so as to mix more thoroughly with the subsequently added binder, avoiding uneven mixing, extrusion blockage or particle performance fluctuations caused by agglomeration. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a top sectional view of the present invention. Figure 4 This is an enlarged structural diagram of point A of this utility model.

[0017] In the diagram: 101, Carrier box; 102, Extrusion cylinder; 103, Heating wire; 104, Cooling water ring; 105, Motor 1; 106, Granulation mold; 107, Screw; 201, Rotating seat; 202, Connecting frame; 203, Knob; 204, Mounting frame plate; 205, Right fixed seat; 206, Motor 2; 207, Protective plate; 208, Left fixed seat; 209, Stud; 210, Rotary cutter; 211, Handle; 301, Dispersing blade; 302, Motor 3; 303, Protective box; 304, Gear; 305, Feed box. Detailed Implementation

[0018] To better understand this utility model, the following embodiments further illustrate its content, but the scope of protection of this utility model is not limited to the embodiments described below. Numerous specific details are set forth in the following description to provide a more thorough understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without one or more of these details.

[0019] like Figure 1 , 2 As shown in Figure 3, a granulation device for carbon nanotubes includes a support box 101, a feed box 305 at the feed inlet on the upper side of the support box 101, an extrusion cylinder 102 on the upper side of the support box 101, multiple heating wires 103 arranged in the interlayer inside the extrusion cylinder 102, a screw 107 rotatably arranged inside the extrusion cylinder 102, a granulation mold 106 on the right side of the extrusion cylinder 102, and a rotating seat 201 on the upper side of the support box 101. A connecting frame 202 is provided, and a mounting frame plate 204 is provided on the lower side of the connecting frame 202. A rotating cutter 210 adapted to the granulation mold 106 is rotatably mounted inside the mounting frame plate 204 via a rotating column. A support and fixing component for the connecting frame 202 is provided on the upper side of the granulation mold 106. A cooling water ring 104 is provided on the outer arc surface of the extrusion cylinder 102. A motor 105 is provided on the left side of the extrusion cylinder 102. The output shaft of the motor 105 is connected to the left end of the screw 107 via a coupling.

[0020] like Figure 2 , 4As shown, the front side of the connecting frame 202 is provided with a handle 211. The support and fixing components include a right fixing seat 205 provided on the granulation mold 106. The threaded hole inside the right fixing seat 205 is internally threaded to a stud 209. The stud 209 is inserted into a locking hole inside the connecting frame 202. A knob 203 is provided on the front side of the stud 209. The upper side of the bearing box 101 is also provided with a left fixing seat 208 that is adapted to the inside of the connecting frame 202. The inside of the mounting frame plate 204 is provided with a second motor 206. The output shaft of the second motor 206 is connected to the right end of the rotating column through a coupling.

[0021] First, the operator controls the heating wire 103 to preheat the inside of the heating cylinder. After heating to the specified temperature, the inlet and outlet pipes of the cooling water ring 104 are connected to the external cooling circulating water system. Then, carbon nanotube powder and a small amount of added binder (such as solvent, polymer solution, etc.) are added into the extrusion cylinder 102 from the feed box 305 according to the ratio. Next, the motor 105 is started, and the output shaft drives the stud 209 to rotate. The carbon nanotube powder and binder are heated and melted in the extrusion chamber, and under the pushing action of the screw 107, they undergo strong shearing, mixing, extrusion and conveying, and are continuously extruded into strips through the micropores on the granulation die 106. The cooling water ring 104 can precisely cool the semi-molten carbon nanotube raw material that is about to enter the granulation mold 106, adjust its viscosity, and ensure the uniformity and stability of the extruded strip. At the same time, by controlling the start of the second motor 206, the output shaft drives the rotary cutter 210 to rotate, cutting the clamped carbon nanotube powder strip into granules, thereby realizing the granulation process of carbon nanotubes. When the rotary cutter 210 is cutting the carbon nanotube powder strip into granules, the screw 107 is inserted into the locking hole of the connecting frame 202 to reliably limit the connecting frame 202, which can prevent the connecting frame 202 from rotating due to the vibration generated by the operation of the second motor 206.

[0022] like Figure 2 , 3 As shown, protective plates 207 are provided on the front and rear sides of the mounting frame plate 204. The protective plates 207 on both sides can prevent the carbon nanotube raw material cut into granules from coming into contact with the motor 206 and causing contamination when the rotating cutter 210 cuts the carbon nanotube powder strips into granules, thereby ensuring the stable operation of the motor 206.

[0023] After pelleting is completed, the screw 107 is rotated out of the screw hole inside the right fixed seat 205 and the locking hole inside the connecting frame 202 by rotating the knob 203 counterclockwise. Then, by holding the handle 211 and rotating the hinged seat 201, the connecting frame 202 can be rotated 180 degrees and accurately placed into the left fixed seat 208, thereby moving the rotary cutter 210 away from the outer side of the pelleting mold 106. Then, the personnel can use a scraper to clean the carbon nanotube raw materials adhering to the outer side of the pelleting mold 106 and the rotary cutter 210.

[0024] According to another embodiment of the present invention, such as Figure 1 , 2 As shown in Figure 3, multiple dispersing blades 301 are rotatably arranged inside the feed box 305. Each dispersing blade 301 has a gear 304 at its front end, and two gears 304 are meshed with each other. A protective box 303 is provided on the front side of the bearing box 101, and both gears 304 are located inside the protective box 303. A motor 302 is provided on the rear side of the bearing box 101. The output shaft of the motor 302 is connected to the rear end of the dispersing blade 301 located on the left side through a coupling.

[0025] When carbon nanotube powder is added into the feed box 305, the motor 302 is turned on by controlling it to run. The output shaft drives the left dispersing blade column 301 and the left gear 304 to rotate, which in turn drives the right gear 304 that is meshed with it to rotate. This allows the dispersing blade columns 301 on both sides to rotate in opposite directions, which more thoroughly disperses the carbon nanotube powder, allowing it to fully contact the binder and be extruded.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A granulation device for carbon nanotubes, comprising a carrier box (101), characterized in that: An extrusion cylinder (102) is provided on the upper side of the bearing box (101). Multiple heating wires (103) are provided in the interlayer inside the extrusion cylinder (102). A screw (107) is rotatably provided inside the extrusion cylinder (102). A granulation mold (106) is provided on the right side of the extrusion cylinder (102). A rotating seat (201) is provided on the upper side of the bearing box (101). A connecting frame (202) is rotatably provided inside the rotating seat (201). A mounting frame plate (204) is provided on the lower side of the connecting frame (202). A rotating cutter (210) adapted to the granulation mold (106) is rotatably provided inside the mounting frame plate (204) through a rotating column. A support and fixing component for the connecting frame (202) is provided on the upper side of the granulation mold (106).

2. The granulation equipment for carbon nanotubes as described in claim 1, characterized in that: A cooling water ring (104) is provided on the outer arc surface of the extrusion cylinder (102).

3. The granulation equipment for carbon nanotubes as described in claim 1, characterized in that: A motor (105) is provided on the left side of the extrusion cylinder (102), and the output shaft of the motor (105) is connected to the left end of the screw (107) through a coupling.

4. The granulation equipment for carbon nanotubes as described in claim 1, characterized in that: The mounting frame plate (204) is equipped with a second motor (206), and the output shaft of the second motor (206) is connected to the right end of the rotating column through a coupling.

5. The granulation equipment for carbon nanotubes as described in claim 1, characterized in that: The support and fixing assembly includes a right fixing seat (205) set on the granulation mold (106), a threaded hole inside the right fixing seat (205) is connected to a stud (209), the stud (209) is inserted into a locking hole inside the connecting frame (202), a knob (203) is provided on the front side of the stud (209), and a left fixing seat (208) adapted to the inside of the connecting frame (202) is also provided on the upper side of the bearing box (101).

6. The granulation equipment for carbon nanotubes as described in claim 1, characterized in that: Protective plates (207) are respectively provided on the front and rear sides of the mounting frame plate (204).

7. The granulation equipment for carbon nanotubes as described in claim 1, characterized in that: A handle (211) is provided on the front side of the connecting frame (202).

8. The granulation equipment for carbon nanotubes as described in claim 1, characterized in that: A feed box (305) is provided at the feed inlet on the upper side of the bearing box (101). Multiple dispersing blades (301) are rotatably arranged inside the feed box (305). Each dispersing blade (301) has a gear (304) at its front end. The two gears (304) are meshed with each other. A protective box (303) is provided on the front side of the bearing box (101). Both gears (304) are located inside the protective box (303). A motor (302) is provided on the rear side of the bearing box (101). The output shaft of the motor (302) is connected to the rear end of the dispersing blade (301) located on the left side through a coupling.

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