Production process of graphene functional sponge

Abstract

The invention discloses a production process of graphene functional sponge. The production process comprises the following steps: 1, putting raw materials into a mixing head of a foaming machine for stirring; 2, a foaming body formed after foaming is sent out of a foaming machine through a conveying belt of the foaming machine to a cut-off machine to be cut into blocks; 3, curing; 4, cooling and curing; 5, compressing and exhausting; and 6, cutting off the hardened surface layer and cutting into blocks. The cotton pressing exhauster comprises an upper layer device and a lower layer device, and the upper layer device is composed of a fixing frame body, four sets of lifting assemblies, a cotton pressing upper frame body installed on the four sets of lifting assemblies and a cooling assembly. According to the invention, the adsorption of the sponge on an organic solvent and grease is enhanced, and meanwhile, during production, the adopted cotton pressing exhauster can prevent the sponge from deforming, damaging or influencing the performance, and meanwhile, the sponge can pass through the cotton pressing exhauster in the shortest time, so that the maximum working efficiency is realized while the product quality is ensured.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of graphene sponge production, and specifically to a production process of graphene functional sponge. Background Art

[0002] Sponge is a porous material with good water absorption and can be used to clean items. Commonly used sponges are made of wood cellulose fibers or foamed plastic polymers. Among them, graphene sponge is a sponge-like three-dimensional graphene structure. The sponge structure allows pollutants to diffuse in its pores. The sponge-like structure is also easier to handle and use than monodispersed sheets. Therefore, graphene sponge has become a graphene adsorption material with great practical prospects.

[0003] The key to preparing graphene sponge is to maintain the porous structure of graphene. When preparing graphene sponge, it is necessary to exhaust the gas, mainly to ensure that the pore structure inside is uniform and dense, so as to improve its performance. Exhausting the foam sponge helps to reduce the gaps and bubbles inside the sponge, making it tighter and more stable, thereby enhancing its elasticity, resilience, sound absorption and thermal insulation properties. At the same time, exhaust can also prevent the sponge from being deformed or damaged due to gas expansion during use, thereby extending its service life. During the compression and exhaust process of the graphene foam sponge, the sponge may generate a certain amount of heat due to friction, compression and other factors. If this heat accumulates too much, it may cause the sponge to deform, damage or affect its performance. Summary of the invention

[0004] The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology. Specifically, the present invention mainly provides a graphene functional sponge production process to solve the technical problems raised in the above background technology.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A production process of graphene functional sponge comprises the following steps: 1. Add trimethylolpropane polyether, 1,6-hexamethylene diisocyanate (HDI), propylene glycol, ethylene glycol monobutyl ether and modifier into the mixing head of the foaming machine for stirring, stir evenly, and heat to 35-40°C, then add acetate fiber, 1,6-hexamethylene diisocyanate (HDI), wollastonite powder, graphene, urea, 4,4'-oxybisbenzenesulfonyl hydrazide, dichloromethane, 2,4,6-tris(dimethylaminomethyl)phenol and water, and stir at high speed for 1-3 minutes; the stirring speed of the mixing head of the foaming machine is 4300r / min, and the pressure of the mixing head is 1.5bar; 2. The foamed body formed after foaming is sent from the foaming machine to the cutting machine through the conveyor belt of the foaming machine and cut into blocks. The conveying speed of the conveyor belt is 5.5m / min; 3. Place the cut sponge strips in a well-ventilated maturation area for 24 hours; 4. After the maturation, the sponge strips are sent to the curing storage bin for 72 hours of cooling and curing; 5. After curing, the sponge strips are sent to the cotton pressing and exhausting machine for bubble extrusion to expel the remaining bubbles inside so as not to affect the elasticity; 6. Remove the hardened surface layer and cut into blocks. The cut sponge blocks are either transported to a storage bin for storage or transported to other processing rooms for further processing.

[0006] A cotton pressing and exhausting machine, applicable to a graphene functional sponge production process, comprises an upper device and a lower device, wherein the upper device is composed of a fixed frame, four sets of lifting components, a cotton pressing upper frame installed on the four sets of lifting components, and a cooling component; Each group of the lifting components includes a support frame and a drive box, a drive motor is provided inside the drive box, a rotatably mounted air compressor screw and a fixedly mounted square cylinder are also provided inside the drive box, the output end of the drive motor drives the air compressor screw to rotate through two mutually meshing gear rings, a screw sleeve is threadedly connected on the air compressor screw, a matching square piston slides inside the square cylinder, and one end of the screw sleeve is connected to the square piston; One end of the cotton pressing upper frame discharging material is rotatably mounted on two of the support frames, and an adjustment box is connected between one end of the cotton pressing upper frame feeding material and the other two support frames; The regulating box is provided with a rotatably mounted regulating screw and regulating gear inside, the regulating screw is threadedly connected with an regulating block that slides inside the regulating box, the regulating screw and the regulating gear are connected by two mutually meshing bevel gears, an external box is provided on one side of the regulating box, an electric guide rail is provided inside the external box, a pneumatic rod and an regulating rack are installed on the movable slider of the electric guide rail, and the regulating rack is meshed with the regulating gear; Each of the pneumatic rods is connected to two air pipes, which are respectively connected to the square cylinder at the discharge end of the cotton pressing upper frame and the square cylinder at the feed end of the cotton pressing upper frame. When the discharge end of the cotton pressing upper frame rises, the square cylinder at the discharge end injects air into the pneumatic rod through the air pipe. When the feed end of the cotton pressing upper frame rises, the square cylinder at the feed end exhausts air from the pneumatic rod through the air pipe.

[0007] Preferably, the lower device includes a roller frame, a plurality of rollers rotatably mounted on the roller frame, and a driving member for driving the plurality of rollers to rotate.

[0008] Preferably, four groups of lifting components are arranged between the fixed frame and the lower device, each group of the lifting components includes a rotatably installed lifting screw, the support frame and the lifting screw are threadedly connected, the drive box is installed at the upper end of the lifting screw, and the drive motor drives the lifting screw to rotate.

[0009] Preferably, a plurality of pressing rollers are provided inside the cotton pressing upper frame, and each of the pressing rollers is rotatably connected to a movable slider on both sides, and the movable sliders slide on both sides of the cotton pressing upper frame, and electric push rods are connected between each of the movable sliders on the same side. A limiting roller is also slidably installed on the feeding end of the cotton pressing upper frame, and the limiting roller and the adjusting block are rotatably connected via a connecting frame.

[0010] Preferably, a plurality of auxiliary plates are provided between each adjacent pressing roller, and the plurality of auxiliary plates are divided into two groups, the front side and the rear side, the two groups of auxiliary plates are alternately arranged in sequence and slidably connected between each other, the front side and the rear side groups of auxiliary plates are respectively connected with auxiliary frames, the auxiliary frames are slidably installed on the cotton pressing upper frame, and the front side and the rear side auxiliary frames are respectively connected to the front and rear movable sliders.

[0011] Preferably, several of the pressure rollers are hollow and filled with coolant, the cooling component includes rotating joints installed at both ends of the pressure roller, one end of the rotating joint is connected to a ball valve, the rotating handle of the ball valve is coaxially connected to a winding wheel, a connecting rope is wound around the winding wheel, and the other end of the connecting rope is fixed to an adjacent movable slider, the ball valve is connected to an infusion pump through an infusion tube, and the rotating joint at the other end of the pressure roller is connected to a discharge tube.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) The compression changes of sponges of different thicknesses and elasticities are different. If the compression amount is large and the compression speed is fast, a large amount of heat will be generated inside the sponge due to compression when the sponge is compressed and exhausted, causing the sponge to deform, damage or affect its performance. When the sponge is compressed and exhausted, rapid compression will easily cause the sponge to deform and damage. This cotton pressing and exhausting machine changes the inclination angle of the cotton pressing upper frame according to the compression deformation of the sponge, so that the compression of the sponge slows down and avoids damage to the sponge caused by rapid compression of the sponge. As the inclination angle of the cotton pressing upper frame changes, the compression time of the sponge also changes accordingly. The compression deformation of the sponge of this cotton pressing and exhausting machine is proportional to the inclination angle of the cotton pressing upper frame. Therefore, the inclination angle of the cotton pressing upper frame of this cotton pressing and exhausting machine can be adaptively adjusted according to different sponges, while avoiding deformation, damage or affecting the performance of the sponge, allowing the sponge to pass through the cotton pressing and exhausting machine in the shortest time, ensuring product quality while maximizing work efficiency.

[0013] (2) When the sponge is compressed, friction may also generate a large amount of heat. Therefore, by making the pressure roller hollow and adding coolant inside it, the large amount of heat generated by friction can be effectively avoided. At the same time, the coolant is driven by a liquid pump to flow, making it suitable for assembly line production. The greater the compression of the sponge, the greater the pressure on the sponge and the greater the friction. Therefore, for sponges with a large compression volume, the flow of coolant is accelerated to quickly take away the heat. For sponges with a small compression volume, the flow of coolant is reduced to reduce energy consumption.

[0014] (3) Start the two driving motors at the feeding end of the cotton pressing upper frame to make the feeding end of the cotton pressing upper frame rise until the distance between the roller and the pressure roller at the feeding end is the same as the thickness of the sponge strip. Calculate the thickness of the sponge strip after compression based on the thickness and elasticity of the sponge strip. Start the two driving motors at the discharging end of the cotton pressing upper frame to make the discharging end of the cotton pressing upper frame rise until the distance between the roller and the pressure roller at the discharging end is the same as the thickness of the sponge strip after compression. This makes the cotton pressing exhaust machine suitable for sponge strips of different thicknesses and elasticities, thereby increasing its practicality.

[0015] (4) After the limit roller moves, several electric push rods are started at the same time, so that the pressure rollers remain equidistant, and the auxiliary plates are opened. The auxiliary plates can prevent the sponge from being inserted between the pressure rollers, ensuring the effective compression of the sponge.

[0016] (5) The graphene of the present invention has super strong hydrophobicity and has the characteristics of strong adsorption capacity and fast adsorption speed for organic solvents and greases, thereby enhancing the adsorption of organic solvents and greases by the sponge.

[0017] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention without the fixed frame; Figure 3 It is a schematic diagram of the structure of the lower layer device of the present invention; Figure 4 This is a schematic diagram of the structure of the cotton pressing upper frame of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 It is a schematic diagram of the structure of the lifting assembly of the present invention; Figure 7 This is a schematic diagram of the internal structure of the drive box of the present invention; Figure 8 It is a side view structural diagram of the regulating box and the external box of the present invention; Fig. 9 This is a schematic diagram of the structure of the cooling component of the present invention; Fig.10 It is a schematic diagram of the connection structure of the auxiliary plate and the auxiliary frame of the present invention.

[0019] In the figure: 1. Upper device; 2. Lower device; 21. Roller frame; 22. Roller; 23. Driving member; 10. Lifting assembly; 101. Support frame; 102. Lifting screw; 103. Drive box; 104. Drive motor; 105. Compressor screw; 106. Square cylinder; 107. Screw sleeve; 108. Square piston; 20. Fixed frame; 30. Cotton pressing upper frame; 301. Pressing roller; 302. Moving slider; 303. Electric push rod; 304. Limiting roller; 305. Auxiliary plate; 306. Auxiliary frame; 40. Cooling assembly; 401. Rotating joint; 402. Ball valve; 403. Winding wheel; 50. Adjustment box; 501. Adjustment screw; 502. Adjustment block; 503. Adjustment gear; 504. External box; 505. Electric guide rail; 506. Pneumatic rod; 507. Adjustment rack. DETAILED DESCRIPTION

[0020] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0023] A production process of graphene functional sponge comprises the following steps: 1. Add trimethylolpropane polyether, 1,6-hexamethylene diisocyanate (HDI), propylene glycol, ethylene glycol monobutyl ether and modifier into the mixing head of the foaming machine for stirring, stir evenly, and heat to 35-40°C, then add acetate fiber, 1,6-hexamethylene diisocyanate (HDI), wollastonite powder, graphene, urea, 4,4'-oxybisbenzenesulfonyl hydrazide, dichloromethane, 2,4,6-tris(dimethylaminomethyl)phenol and water, and stir at high speed for 1-3 minutes; the stirring speed of the mixing head of the foaming machine is 4300r / min, and the pressure of the mixing head is 1.5bar; Among them, 40kg of trimethylolpropane polyether, 5kg of cellulose acetate, 2kg of propylene glycol, 12kg of 1,6-hexamethylene diisocyanate (HDI), 3kg of wollastonite powder, 3kg of graphene, 2kg of urea, 0.3kg of 4,4'-oxybisbenzenesulfonyl hydrazide, 1.2kg of dichloromethane, 0.3kg of 2,4,6-tris(dimethylaminomethyl)phenol, 3kg of ethylene glycol monobutyl ether, 2kg of modifier, and 8kg of water.

[0024] 2. The foamed body formed after foaming is sent from the foaming machine to the cutting machine through the conveyor belt of the foaming machine and cut into blocks. The conveying speed of the conveyor belt is 5.5m / min; 3. Place the cut sponge strips in a well-ventilated maturation area for 24 hours; 4. After the maturation, the sponge strips are sent to the curing storage bin for 72 hours of cooling and curing; 5. After curing, the sponge strips are sent to the cotton pressing and exhausting machine for bubble extrusion to expel the remaining bubbles inside so as not to affect the elasticity; 6. Remove the hardened surface layer and cut into blocks. The cut sponge blocks are either transported to a storage bin for storage or transported to other processing rooms for further processing. Please refer to the attached Figure 1 - Figure 3 A cotton pressing and exhausting machine is suitable for a graphene functional sponge production process, including an upper device 1 and a lower device 2. The upper device 1 is composed of a fixed frame 20, four sets of lifting components 10, a cotton pressing upper frame 30 installed on the four sets of lifting components 10, and a cooling component 40; the lower device 2 includes a roller frame 21, a plurality of rollers 22 rotatably installed on the roller frame 21, and a driving member 23 for driving the plurality of rollers 22 to rotate. The driving member 23 is composed of a motor, a chain gear, etc., and the plurality of rollers 22 are driven to rotate by the driving member 23. This is an existing mature technology and will not be described in detail here.

[0025] Please refer to the attached Figure 2 , Figure 6 and Figure 7Each lifting assembly 10 includes a support frame 101 and a drive box 103, a drive motor 104 is provided inside the drive box 103, four lifting assemblies 10 are arranged between the fixed frame 20 and the lower device 2, each lifting assembly 10 includes a rotatably installed lifting screw 102, the support frame 101 and the lifting screw 102 are threadedly connected, the drive box 103 is installed at the upper end of the lifting screw 102, the drive motor 104 drives the lifting screw 102 to rotate, one end of the cotton pressing upper frame 30 for discharging is rotatably installed on two of the support frames 101, and an adjustment box 50 is connected between one end of the cotton pressing upper frame 30 for feeding and the other two support frames 101.

[0026] Start the two driving motors 104 at the feeding end of the cotton pressing upper frame 30 to make the feeding end of the cotton pressing upper frame 30 rise until the distance between the roller 22 and the pressing roller 301 at the feeding end is the same as the thickness of the sponge bar, calculate the thickness of the sponge bar after compression according to the thickness and elasticity of the sponge bar, start the two driving motors 104 at the discharging end of the cotton pressing upper frame 30 to make the discharging end of the cotton pressing upper frame 30 rise until the distance between the roller 22 and the pressing roller 301 at the discharging end is the same as the thickness of the sponge bar after compression, so that the cotton pressing exhaust machine can be suitable for sponge bars of different thicknesses and elasticities, thereby increasing its practicality.

[0027] Please refer to the attached Figure 4 - Figure 8 , the driving box 103 is also provided with a rotatably mounted air compressor screw 105 and a fixedly mounted square cylinder 106. The output end of the driving motor 104 drives the air compressor screw 105 to rotate through two mutually meshing gear rings. A screw sleeve 107 is threadedly connected to the air compressor screw 105. A matching square piston 108 slides inside the square cylinder 106. One end of the screw sleeve 107 is connected to the square piston 108; each air pressure rod 506 is connected to two air pipes, and the two air pipes are respectively connected to the square cylinder 106 at the discharge end of the cotton pressing upper frame 30 and the feeding end of the cotton pressing upper frame 30. square cylinder 106; the interior of the adjusting box 50 is provided with a rotatably mounted adjusting screw 501 and an adjusting gear 503, the adjusting screw 501 is threadedly connected with an adjusting block 502 that slides inside the adjusting box 50, the adjusting screw 501 and the adjusting gear 503 are connected by two mutually meshing bevel gears, an external box 504 is provided on one side of the adjusting box 50, an electric guide rail 505 is provided inside the external box 504, a pneumatic rod 506 and an adjusting rack 507 are installed on the moving slider of the electric guide rail 505, and the adjusting rack 507 and the adjusting gear 503 are meshed.

[0028] When the driving motor 104 is started, the air compression screw 105 rotates accordingly, so that the screw sleeve 107 drives the square piston 108 to move. When the discharge end of the cotton pressing upper frame 30 rises, the square cylinder 106 at the discharge end injects air into the air pressure rod 506 through the air pipe. When the feeding end of the cotton pressing upper frame 30 rises, the square cylinder 106 at the feeding end exhausts air from the air pressure rod 506 through the air pipe. After the multiple square cylinders 106 inject air into and exhaust air from the air pressure rod 506, the telescopic length of the air pressure rod 506 is fixed. At this time, the electric guide rail 505 is started, so that the movable slider of the electric guide rail 505 moves, driving the adjustment rack 507 to move. The adjustment rack 507 drives the adjustment gear 503 to rotate, so that the adjustment screw 501 rotates, and the adjustment block 502 drives the limit roller 304 to move.

[0029] Please refer to the attached Figure 4 - Figure 8 , a plurality of pressing rollers 301 are arranged inside the cotton pressing upper frame 30, and a movable slider 302 is rotatably connected on both sides of each pressing roller 301, and the movable slider 302 slides on both sides of the cotton pressing upper frame 30, and an electric push rod 303 is connected between each of the movable sliders 302 on the same side, and a limiting roller 304 is slidably installed on the feeding end of the cotton pressing upper frame 30, and the limiting roller 304 and the adjusting block 502 are rotatably connected through a connecting frame, and a plurality of auxiliary plates 305 are arranged between each two adjacent pressing rollers 301, and the plurality of auxiliary plates 305 are divided into two groups, the front side and the rear side, and the two groups of auxiliary plates 305 are staggered in sequence and slidably connected between each other, and the front and rear groups of auxiliary plates 305 are respectively connected with auxiliary frames 306, which are slidably installed on the cotton pressing upper frame 30, and the front and rear auxiliary frames 306 are respectively connected to the front and rear movable sliders 302. After the limiting roller 304 finishes moving, several electric push rods 303 are started at the same time, so that the several pressure rollers 301 still maintain an equal distance, and at the same time the auxiliary plate 305 is opened. The auxiliary plate 305 can prevent the sponge from being inserted between the pressure rollers 301, thereby ensuring the effective compression of the sponge.

[0030] Please refer to the attached Figure 4 - Fig. 9, several pressure rollers 301 are all hollow and filled with coolant. The cooling component 40 includes a rotating joint 401 installed at both ends of the pressure roller 301, one end of the rotating joint 401 is connected to a ball valve 402, the rotating handle of the ball valve 402 is coaxially connected to a winding wheel 403, a connecting rope is wound around the winding wheel 403, and the other end of the connecting rope is fixed to an adjacent moving slider 302, the ball valve 402 is connected to the infusion pump through an infusion tube, and the rotating joint 401 at the other end of the pressure roller 301 is connected to a discharge tube. When the sponge is compressed, friction may also generate a large amount of heat. Therefore, by setting the pressure roller 301 to be hollow and adding coolant inside it, the large amount of heat generated by friction can be effectively avoided. At the same time, the coolant is driven by a liquid pump to flow, making it suitable for assembly line production. The greater the compression of the sponge, the greater the pressure on the sponge, and the greater the friction. Therefore, for sponges with a large compression amount, the flow of coolant is accelerated to quickly take away the heat. For sponges with a small compression amount, the flow of coolant is reduced to reduce energy consumption.

[0031] The specific steps are as follows: Start the two driving motors 104 at the feeding end of the cotton pressing upper frame 30 to make the feeding end of the cotton pressing upper frame 30 rise until the distance between the roller shaft 22 and the pressing roller 301 at the feeding end is the same as the thickness of the sponge strip. According to the thickness and elasticity of the sponge strip, the thickness of the sponge strip after compression is calculated. Start the two driving motors 104 at the discharging end of the cotton pressing upper frame 30 to make the discharging end of the cotton pressing upper frame 30 rise until the distance between the roller shaft 22 and the pressing roller 301 at the discharging end is the same as the thickness of the sponge strip after compression. When the height adjustment of the feeding end and the discharging end of the cotton pressing upper frame 30 is completed, the cotton pressing upper frame 30 is tilted. When adjusting the angle of the cotton pressing upper frame 30, the air compression screw 105 rotates following the output end of the driving motor 104, so that the screw sleeve 107 drives the square piston 108 to move. When the discharge end of the cotton pressing upper frame 30 rises, the square cylinder 106 at the discharge end injects air into the air pressure rod 506 through the air pipe. When the feed end of the cotton pressing upper frame 30 rises, the square cylinder 106 at the feed end evacuates air from the air pressure rod 506 through the air pipe until the adjustment of the angle of the cotton pressing upper frame 30 is completed. When multiple square tubes 106 have finished injecting air into and exhausting air from the pneumatic rod 506, the telescopic length of the pneumatic rod 506 is fixed. At this time, the electric guide rail 505 is started to move the movable slider of the electric guide rail 505, driving the adjustment rack 507 to move. The adjustment rack 507 drives the adjustment gear 503 to rotate, causing the adjustment screw 501 to rotate, allowing the adjustment block 502 to drive the limit roller 304 to move, and determine the position of the limit roller 304. After the limit roller 304 has finished moving, several electric push rods 303 are started at the same time, so that the several pressure rollers 301 are still kept equidistant, and the auxiliary plate 305 is opened at the same time. After that, the sponge can be sent between the upper device 1 and the lower device 2.

[0032] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A graphene functional sponge production process, characterized in that: The following steps are involved:

1. Add trimethylolpropane polyether, 1,6-hexamethylene diisocyanate (HDI), propylene glycol, ethylene glycol monobutyl ether and modifier into the mixing head of the foaming machine for stirring, stir evenly, and heat to 35-40°C, then add acetate fiber, 1,6-hexamethylene diisocyanate (HDI), wollastonite powder, graphene, urea, 4,4'-oxybisbenzenesulfonyl hydrazide, dichloromethane, 2,4,6-tris(dimethylaminomethyl)phenol and water, and stir at high speed for 1-3 minutes; the stirring speed of the mixing head of the foaming machine is 4300r / min, and the pressure of the mixing head is 1.5bar; 2. The foamed body formed after foaming is sent from the foaming machine to the cutting machine through the conveyor belt of the foaming machine and cut into blocks. The conveying speed of the conveyor belt is 5.5m / min; 3. Place the cut sponge strips in a well-ventilated maturation area for 24 hours; 4. After the maturation, the sponge strips are sent to the curing storage bin for 72 hours of cooling and curing; 5. After curing, the sponge strips are sent to the cotton pressing and exhausting machine for bubble extrusion to expel the remaining bubbles inside so as not to affect the elasticity; 6. Remove the hardened surface layer and cut into blocks. The cut sponge blocks are either transported to a storage bin for storage or transported to other processing rooms for further processing.

2. A cotton pressing and exhausting machine, suitable for the graphene functional sponge production process according to claim 1, characterized in that: It comprises an upper device (1) and a lower device (2), wherein the upper device (1) is composed of a fixed frame (20), four sets of lifting components (10), a cotton pressing upper frame (30) installed on the four sets of lifting components (10), and a cooling component (40); Each group of the lifting components (10) comprises a support frame (101) and a drive box (103), wherein a drive motor (104) is provided inside the drive box (103), and a rotatably mounted air compressor screw (105) and a fixedly mounted square cylinder (106) are also provided inside the drive box (103), wherein the output end of the drive motor (104) drives the air compressor screw (105) to rotate via two mutually meshing gear rings, a screw sleeve (107) is threadedly connected to the air compressor screw (105), a matching square piston (108) is slidably provided inside the square cylinder (106), and one end of the screw sleeve (107) is connected to the square piston (108); One end of the cotton pressing upper frame (30) for discharging materials is rotatably mounted on two of the support frames (101), and an adjustment box (50) is connected between one end of the cotton pressing upper frame (30) for feeding materials and the other two support frames (101); The regulating box (50) is provided with a rotatably mounted regulating screw (501) and a regulating gear (503) inside, the regulating screw (501) is threadedly connected with an regulating block (502) that slides inside the regulating box (50), the regulating screw (501) and the regulating gear (503) are connected by two mutually meshing bevel gears, an external box (504) is provided on one side of the regulating box (50), an electric guide rail (505) is provided inside the external box (504), a pneumatic rod (506) and an regulating rack (507) are installed on a movable slider of the electric guide rail (505), and the regulating rack (507) and the regulating gear (503) are meshed with each other; Each of the pneumatic rods (506) is connected to two air pipes, and the two air pipes are respectively connected to the square cylinder (106) at the discharge end of the cotton pressing upper frame (30) and the square cylinder (106) at the feed end of the cotton pressing upper frame (30). When the discharge end of the cotton pressing upper frame (30) rises, the square cylinder (106) at the discharge end injects air into the pneumatic rod (506) through the air pipe, and when the feed end of the cotton pressing upper frame (30) rises, the square cylinder (106) at the feed end exhausts air from the pneumatic rod (506) through the air pipe.

3. A cotton pressing and exhausting machine according to claim 2, characterized in that: The lower device (2) comprises a roller frame (21), a plurality of rollers (22) rotatably mounted on the roller frame (21), and a driving member (23) for driving the plurality of rollers (22) to rotate.

4. A cotton pressing and exhausting machine according to claim 2, characterized in that: Four groups of lifting components (10) are arranged between the fixed frame (20) and the lower device (2), each group of the lifting components (10) comprises a rotatably mounted lifting screw (102), the support frame (101) and the lifting screw (102) are threadedly connected, the drive box (103) is installed on the upper end of the lifting screw (102), and the drive motor (104) drives the lifting screw (102) to rotate.

5. A cotton pressing and exhausting machine according to claim 2, characterized in that: A plurality of pressing rollers (301) are arranged inside the cotton pressing upper frame (30), and each of the pressing rollers (301) is rotatably connected to a movable slider (302) on both sides, and the movable sliders (302) slide on both sides of the cotton pressing upper frame (30), and electric push rods (303) are connected between each of the movable sliders (302) on the same side. A limiting roller (304) is also slidably installed at the feeding end of the cotton pressing upper frame (30), and the limiting roller (304) and the adjustment block (502) are rotatably connected via a connecting frame.

6. A cotton pressing and exhausting machine according to claim 5, characterized in that: A plurality of auxiliary plates (305) are provided between each of the adjacent pressing rollers (301), and the plurality of auxiliary plates (305) are divided into two groups, namely, the front side and the rear side. The two groups of auxiliary plates (305) are arranged alternately in sequence and are slidably connected to each other. The two groups of auxiliary plates (305) on the front side and the rear side are respectively connected to auxiliary frames (306), and the auxiliary frames (306) are slidably installed on the cotton pressing upper frame (30), and the auxiliary frames (306) on the front side and the rear side are respectively connected to the two front and rear movable sliders (302).

7. A cotton pressing and exhausting machine according to claim 5, characterized in that: The plurality of pressure rollers (301) are hollow and filled with cooling liquid. The cooling assembly (40) comprises rotating joints (401) installed at both ends of the pressure rollers (301), wherein the rotating joint (401) at one end is connected to a ball valve (402), the rotating handle of the ball valve (402) is coaxially connected to a winding wheel (403), a connecting rope is wound around the winding wheel (403), and the other end of the connecting rope is fixed to an adjacent movable slider (302), the ball valve (402) is connected to an infusion pump via an infusion tube, and the rotating joint (401) at the other end of the pressure roller (301) is connected to a discharge tube.

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