Industrial sizing device for carbon fiber

Abstract

A carbon fiber industrial sizing device, which consists of four parts: a sizing system, a sizing system, a sizing control system, and a mobile and fixed base system. The device can be conveniently grafted onto an industrial production line to realize the sizing production and testing of various new sizing agents and carbon fibers with various sizing rates. The present invention is used for carbon fiber sizing, and the carbon fiber bundle has high spreading efficiency, fast sizing agent impregnation speed, uniform sizing, and good single-filament mesh separation performance, and the entire sizing production process has no power consumption and no waste sizing agent discharge.

Description

Technical Field

[0001] The invention relates to carbon fiber production equipment, in particular to an industrialized sizing device for carbon fiber. Technical Background

[0002] Carbon fiber cannot be used alone. Its high performance and multi-function can only be realized by combining it with other materials. After being wound into ingots, carbon fiber without sizing agent protection cannot be unwound in the subsequent composite material processing application, thus losing its use value. The use of sizing agent affects the physical and chemical properties of carbon fiber composites in the following ways: (1) It gathers the dispersed carbon fibers into a bundle, which is convenient for spinning, transportation and subsequent unwinding; (2) It forms a protective film on the surface of carbon fiber, which increases the toughness and friction resistance of brittle carbon fiber and reduces the breakage or cracking of carbon fiber; (3) It introduces active groups on the surface of carbon fiber, which makes it easy to infiltrate and form a strong interfacial chemical bond between carbon fiber, sizing agent and matrix, thus avoiding or reducing defects in composite material post-processing and finished products.

[0003] The main carbon fiber sizing methods include dipping method, spraying method, etc. The dipping method of carbon fiber sizing is simple to operate: the carbon fiber is impregnated with the sizing agent, and the carbon fiber is wetted by controlling the type, concentration and impregnation time of the sizing agent. It is the mainstream sizing process route for industrial carbon fiber production at home and abroad; the spraying method is to spray the sizing agent onto the surface of the carbon fiber with a spray gun, and then evaporate the solvent after drying in an oven to form a protective film on the fiber surface. This process has not been industrialized because it requires complex environmental protection measures and the protective film of the carbon fiber sizing agent is uneven and has a lateral impact on the running carbon fiber.

[0004] Whether the carbon fiber sizing agent can be evenly coated on the surface of the carbon fiber is closely related to the performance quality of the carbon fiber, whether it can be industrialized and stably produced, and whether it can smoothly enter the downstream market application. One of the main problems of the existing broken fibers of domestic carbon fiber, the difficulty in achieving 100% of the premium grade rate, and the appearance, unwinding, fiber separation, and bundle strength of the carbon fiber after sizing are still somewhat different from those of Japan's Toray carbon fiber is that the sizing efficiency and sizing uniformity of the existing impregnation process sizing device need to be improved.

[0005] The existing industrial carbon fiber sizing device is a five-roller sizing tank, in which two rollers are partially or completely immersed in the sizing agent. The impregnated carbon fiber undergoes two expansion and extrusion sizing by two sizing agent guide rollers in the sizing agent. After sizing, the carbon fiber is then sizing and extruded by a pair of control rollers. The extrusion pressure comes from the factory compressed air network pressure. Due to the large number of compressed air users, the network pressure is often in a fluctuating state, which causes fluctuations in the extrusion amount of the sizing agent on the sized carbon fiber, resulting in fluctuations in the sizing uniformity and sizing rate of the carbon fiber monofilament.

[0006] The domestic invention patent 'Experimental carbon fiber sizing device' (CN 105525466A) involves the sizing process and schematic diagram, especially the guide rollers, expansion device, sizing liquid circulation pump, overflow port, sizing pipeline, and sizing pipe mouth position of the sizing tank. However, the sizing tank type is a conventional rectangular shape, the expansion performance of the guide roller of the tank is poor, and it only has a constant liquid level function and no drainage capacity. After the test of the sizing device is completed, the sizing agent at the bottom of the impregnated roller cannot be used and the sewage cleaning is difficult; the guide rollers are four rollers and two impregnated rollers, and there is no sizing agent pressure roller for controlling the sizing agent content, but the ceramic material is limited. It is expected that the sizing device will cause extremely high energy consumption for carbon fiber drying due to the lack of a pressure roller; it involves a sizing liquid circulation pump, but the pump only circulates, and there is no specific pump type, technical parameters and other functional limitations; the overflow port and the sizing pipe mouth have front and rear position requirements, but no specific height limit; the invention patent is an experimental device with a maximum production capacity of six spindles (6 bundles of carbon fiber).

[0007] CN105348768A patent 'a method and device for preparing carbon fiber reinforced thermoplastic resin composite materials' involves a carbon fiber desizing device, while other desizing devices are directly fed into a die for granulation after electroplating without sizing.

[0008] There are no reports of specialized industrial sizing devices abroad. In similar patent documents: Mitsubishi Rayon Co., Ltd. CN1537188A - Sizing agent for carbon fiber, carbon fiber sizing method using the sizing agent, carbon fiber treated with sizing agent, and woven fabric using the carbon fiber invention patent, the sizing method only involves the composition of sizing agent raw materials, pH range and use, and does not introduce the impregnation method and device; Mitsubishi Rayon CN104603351A invention patent reports a carbon fiber bundle for resin reinforcement and its manufacturing method, as well as a carbon fiber reinforced thermoplastic resin composition and molded products, which only involves the sizing agent group category, components, sizing time and sizing tank immersion length, and no other process and device information;

[0009] JP 2014139360A: SIZING AGENT APPLIED CARBON FIBER, ITS MANUFACTURING METHOD, AND CARBON FIBER REINFORCED THERMOPLASTIC RESIN COMPOSITION - Sizing agent and its manufacturing method, carbon fiber, carbon fiber reinforced thermoplastic resin composition - invention patent protects the sizing agent composition with excellent storage stability, adhesion, heat resistance and resistance to low temperature and harsh working environment, and the method of ultrasonic treatment sizing agent coating carbon fiber;

[0010] US20040197555A1:Sizing agent for carbon fiber, method for sizing carbon fiber by said sizing agent, sized carbon fiber and knitted or woven fabric Using said carbon fibe---Sizing agent for carbon fiber, method for sizing carbon fiber using said sizing agent, sized carbon fiber and knitted or woven fabric using said carbon fiber---the invention patent relates to a special (for chopped carbon fiber) sizing agent composition, sizing method, pH range that can give carbon fiber sufficient convergence and uniform filament dispersion and its fabric is easy to be impregnated with water, but there is no specific sizing process route and sizing device limitation description.

[0011] As the market demand for high-performance, low-cost, and multi-variety carbon fibers increases, the invention of a new type of industrial sizing device with good expansion performance, high sizing efficiency, uniform sizing, stable sizing rate, energy saving and environmental protection has become a new way for carbon fiber manufacturers to meet market requirements and enhance product competitiveness. Summary of the invention

[0012] The present invention provides an industrial sizing device for carbon fiber. The device can be conveniently grafted onto an industrial production line. Experiments show that the device of the present invention is used for sizing carbon fiber, and the carbon fiber tow has high spreading efficiency, fast sizing agent impregnation speed, uniform sizing, and good single-filament mesh separation performance. Moreover, the entire sizing production process does not consume electricity and does not discharge waste sizing agent.

[0013] The technical solution of the present invention is as follows:

[0014] A carbon fiber industrial sizing device, characterized in that it consists of four parts: a sizing system, a sizing supply system, a sizing control system and a base frame system. The sizing system is located at the upper part of the device; the sizing agent storage tank and the circulating feed pump of the sizing supply system are located directly below the sizing system, and the sizing control system is located at the upper left part of the sizing system; the lower part of the base frame system accommodates the sizing supply system, and the upper part of the base frame system supports the sizing supply system and the sizing control system, and is located at the bottom and periphery of the above three systems;

[0015] The sizing system is composed of a sizing agent supply pipe, a star-shaped guide roller, a star-shaped sizing roller, an X-axis level and a Y-axis level, and a sizing trough. The sizing trough is an arc-shaped sizing trough with an arc-shaped middle part at the bottom, which is located at the bottom of the sizing system. The left and right sides of the sizing trough are each provided with two supporting ears, and the four supporting ears place the sizing trough on two channel steels in the highest Y-axis direction of the base frame. The overflow pipe is a welded short pipe that vertically passes through the left front flat bottom of the arc concave sizing trough; the upper overflow port height of the overflow pipe is lower than the slot of the sizing trough; the sizing trough self-circulation feed pipe is located at the center of the bottom of the arc concave sizing trough, and is a welded short section with a ball valve vertically downward; the star-shaped guide roller is located at the upper right part of the arc-concave sizing trough, and is directly inserted into the two rightmost channels of the two channel steels before and after the highest X-axis of the base frame that are fastened by bolts. The star-shaped sizing roller is located in the middle of the arc-concave sizing groove, and is directly inserted into the two supporting bearings fastened by bolts to the middle of the two channel steels before and after the highest X-axis of the base frame, and the star-shaped guide roller is fixed by a positioning key, and the roller axis of the star-shaped guide roller is at the same level as that of the star-shaped sizing roller; the sizing agent feeding pipe reaches the sky above the sizing system from the right behind the sizing groove from bottom to top, and then extends forward to the middle position just above the star-shaped sizing roller and the star-shaped guide roller, with the pipe opening facing downward; the sizing agent feeding pipe is behind the sizing groove, and is fixed by a clamp to a section of channel steel between the star-shaped sizing roller and the star-shaped guide roller; the X-axis level and the Y-axis level are respectively fixed by bolts to the front channel steel and the left channel steel of the highest X and Y directions of the base frame;

[0016] The slurry supply system is composed of a sizing agent storage tank, a large circulation feed pipe, a reflux short pipe, a feed pump, a circulation feed pipe, a feed pump feed pipe, a feed pump feed hose and a feed pump feed hose. The sizing agent storage tank is a rectangular storage tank placed on the left side of the base frame bottom plate; the large circulation feed pipe is welded to the inner wall of the rear side of the sizing agent storage tank, and its lower pipe mouth is inserted into the bottom of the sizing agent storage tank, and its upper part is higher than the tank slot and is divided into two. One horizontal pipe is the feed pump feed pipe, which is connected to the feed pump feed hose quick connector, and one vertical short pipe is connected to the circulation feed pipe The reflux pipe is welded to the inner wall on the left side of the storage tank, and its lower pipe opening is inserted above the liquid level in the storage tank. The upper pipe opening of the reflux pipe is higher than the slot of the storage tank and is connected to the lower pipe opening of the overflow pipe through a hose with a quick head. The feed pump is a diaphragm pump, which is placed in the middle of the right side of the sizing agent storage tank on the base frame bottom plate. The inlet of the feed pump is connected to the large circulation feed pipe with a plastic hose, and the outlet of the feed pump is connected to the threaded metal hose of the sizing agent feed pipe. The feed pump is externally connected to compressed air.

[0017] The slurry control system is located at the upper left of the star-shaped sizing roller of the sizing system, and is composed of a slurry control roller, a slurry control pressure roller, a slurry control pressure roller bracket, and a slurry control counterweight; the slurry control roller is on the left side of the star-shaped sizing roller, directly inserted into two X-axis movable bearings and fixed with positioning keys; the slurry control pressure roller bracket is on the left front and left rear of the slurry control roller, and is respectively welded to the two corners where the front and rear channels of the highest X and Y axes on the left side of the base frame intersect, and is composed of an upright bracket, a metal semicircular loose-leaf, a rotatable bearing and a counterweight hanger, and a hanging chain: one page of the metal semicircular loose-leaf is fixed to the upright bracket by screws On the right side of the middle of the frame, another page is fixed to the left end of the metal short section by bolts and nuts, a ball bearing is fixed on the right end of the metal short section by screws, and a counterweight bracket is welded on the outer side of the right end, and the slurry control pressure roller is directly inserted into the bearing on the rotatable short section on the slurry control pressure roller bracket. During the production process of controlling the pressure roller and the slurry control roller to be vertically aligned and contacted up and down, the slurry control counterweight is connected to the hook of the counterweight bracket through the hook on its upper part, and is hung on the front and rear sides of the counterweight bracket with its own weight; during the process of stopping production and handling the wool winding roller, the slurry control counterweight is removed from the counterweight bracket, and the hook placed on is hooked with the hook on the suspension chain;

[0018] The frame system is welded by a lower frame and an upper frame, and the upper frame supports the slurry supply system and the slurry control system; the lower frame is composed of a counterweight, a base plate, a universal roller and a long rod screw; the universal roller has a locking switch and is at the bottom of the device; the base plate is located above the universal roller and below the slurry supply system and the counterweight; the counterweight is divided into two and placed in a front-to-rear symmetrical position of the feed pump on the right side of the storage tank; the long rod screw is screwed into the four legs at the bottom of the frame.

[0019] The material of the base frame system is channel steel; the material of the sizing agent contact equipment is carbon fiber contact material, and the plate wall thickness is 3MM reinforced; the material of the carbon fiber contact is chromium-plated and mirror-smooth; the material of the bearing ball is hard stainless steel; the material of the quick head is carbon fiber contact material; all hoses are made of wire-reinforced transparent plastic.

[0020] The beneficial effects of the present invention are:

[0021] 1. Able to smoothly enter the operating space between equipment in the carbon fiber production process;

[0022] 2. Quickly and conveniently realize the positioning, leveling and stability of the device for batch carbon fiber tension maintenance; the guide roller design meets the following requirements: the designed star-shaped guide roller has a progressive expansion and spreading effect on the carbon fiber impregnated in the sizing agent, and the selected material and finish keep the carbon fiber from producing hair and winding around the roller;

[0023] 3. The performance of the device of the present invention meets the following requirements: ① It is suitable for sizing with different types and varieties of sizing agents, and can replace the existing industrial five-roller sizing tank, and can also be used in series or parallel with it; ② The sizing efficiency is high and the sizing is uniform; ③ The sizing rate is stable and easy to control; ④ It has the ability to use up the sizing agent, no sizing waste liquid is discharged, no electricity is required, and it is energy-saving and environmentally friendly. ⑤ It can realize both industrialized mass production of carbon fiber and scientific research experiments on single-bundle carbon fiber.

[0024] The present invention is used for carbon fiber sizing, and the carbon fiber bundle has high spreading efficiency, fast sizing agent impregnation speed, uniform sizing and good single-filament mesh separation performance, and the entire sizing production process has no power consumption and no waste sizing agent discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the industrial sizing device for carbon fiber of the present invention.

[0026] Figure 2 This is the sizing principle diagram of the carbon fiber industrial sizing device of the present invention

[0027] Figure 3 Schematic diagram of the connection between the overall structure 4 of the base frame and its upper support

[0028] Figure 4(a) shows Figure 3 FIG4( b ) is a schematic diagram of the enlarged structure of the local grouting support. FIG4( b ) is a schematic diagram of the enlarged structure of the local fixed bearing.

[0029] Figure 5 This is a schematic diagram of the structure of the star-shaped guide roller 16 and the sizing roller 17.

[0030] Figure 6 Schematic diagram of the support structure and running track of the slurry control roller

[0031] Figure 7 Schematic diagram of the sizing tank structure

[0032] Figure 8 This is a schematic diagram of the sizing system in place

[0033] Fig. 9 Schematic diagram of the structure of the sizing agent feed pipe metal hose 18

[0034] Fig.10 This is a schematic diagram of the structure connection of the pneumatic pump 27 (with threaded metal hose, plastic hose)

[0035] Fig.11 Schematic diagram of the structure connection of the metal wire reinforced transparent plastic hose 9

[0036] Fig.12 Schematic diagram of the sizing agent storage tank 11 DETAILED DESCRIPTION

[0037] The following will be combined with the combinations, components and drawings in the embodiments of the present invention to clearly and completely describe the technical solutions and methods of use of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by other technicians in the field without creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] The carbon fiber industrial sizing device provided by the present invention is as follows: Figure 1 As shown, it is composed of four parts: sizing system 1, sizing system 2, sizing control system 3, and base frame system 4.

[0040] The sizing system 1 is located at the upper part of the device; the sizing agent storage tank and the circulating feed pump of the sizing system 2 are located directly below the sizing system 1, and the sizing control system 3 is located at the upper left part of the sizing system 1; the lower part of the base system 4 accommodates the sizing system 2, and the upper part of the base system 4 supports the sizing system 2 and the sizing control system 3, and is located at the bottom and periphery of the above three systems;

[0041] The sizing system 1, see Figure 2 , which is composed of a sizing agent feeding pipe 20, a star-shaped guide roller 17, a star-shaped sizing roller 16, an X-axis level 5 and a Y-axis level 6, and a sizing trough 19. The sizing trough 19 is an arc-shaped sizing trough with an arc-shaped middle part at the bottom, and is located at the bottom of the sizing system 1. The left and right sides of the sizing trough 19 each have two supporting ears, and the four supporting ears place the sizing trough 19 on two channel steels in the highest Y-axis direction of the base frame. The overflow pipe 7 is a welded short pipe that vertically passes through the left front flat bottom of the arc concave sizing trough; the upper overflow port of the overflow pipe 7 is lower than the slot port of the sizing trough 19; the sizing trough self-circulation feed pipe 24 is located at the bottom of the arc concave sizing trough 19 The center is a welded short section with a ball valve vertically downward; the star-shaped guide roller 17 is located in the upper right part of the arc concave sizing groove 19, and is directly inserted into the two rightmost support bearings fastened by bolts to the two channel steels before and after the highest X-axis of the base frame 4, and the star-shaped guide roller 17 and the bearings are fixed by positioning keys; the star-shaped sizing roller 16 is located in the upper middle part of the arc concave sizing groove 19, and is directly inserted into the two support bearings fastened by bolts to the middle of the two channel steels before and after the highest X-axis of the base frame, and the star-shaped guide roller 17 is fixed by positioning keys, and the roller axes of the star-shaped guide roller 17 and the star-shaped sizing roller 16 are at the same level; the sizing agent feeding pipe 18 (see Fig. 9) from the rear right side of the sizing tank 19, from bottom to top to the top of the sizing system 1, after being divided into two parts to the left and right, it extends forward to the middle position just above the star-shaped sizing roller 16 and the star-shaped guide roller 17, and the pipe mouth faces downward; the sizing agent feeding pipe 18 is behind the sizing tank 19 and is fixed to a section of channel steel between the star-shaped sizing roller 16 and the star-shaped guide roller 17 by a clamp; the X-axis level 5 and the Y-axis level 6 are respectively fixed to the front channel steel and the left channel steel of the highest X and Y directions of the base frame by bolts;

[0042] The slurry supply system 2 is composed of a sizing agent storage tank 11, a large circulation feed pipe 24, a short return pipe 10, and a feed pump 27 (see Fig.10 ), a circulating feed pipe 22, a feed pump feed pipe 21, a feed pump feed hose 26 and a feed pump feed hose 25. The sizing agent storage tank 11 is a rectangular storage tank placed on the left side of the base frame bottom plate; the large circulating feed pipe 24 is welded to the inner wall of the rear side of the sizing agent storage tank 11, and its lower pipe mouth is inserted into the bottom of the sizing agent storage tank 11, and its upper part is higher than the tank slot and is divided into two. One horizontal pipe is the feed pump feed pipe 21, which is connected to the feed pump feed hose 26 quick connector, and one vertical short pipe is connected to the circulating feed pipe 22 through a hose 29 with a quick head (see Fig.11 ) connected; the reflux pipe 10 is welded to the left inner wall of the storage tank, and its lower pipe opening is inserted above the liquid level in the storage tank. The upper pipe opening of the reflux pipe 10 is higher than the slot of the storage tank and is connected to the lower pipe opening of the overflow pipe 7 through a hose 29 with a quick-connect head; the feed pump 27 is a diaphragm pump, which is placed in the middle of the right side of the sizing agent storage tank 11 on the bottom plate of the base frame; the inlet of the feed pump 27 is connected to the large circulation feed pipe 24 with a plastic hose, and the outlet of the feed pump 27 is threadedly connected to the metal hose of the sizing agent feed pipe 18; the feed pump 27 is externally connected to compressed air;

[0043] The slurry control system 3 is located at the upper left of the star-shaped slurry roller 16 of the slurry system 1. The slurry control system 3 (see Figure 7 , Figure 8 ) is composed of a slurry control roller 15, a slurry control pressure roller 12, a slurry control pressure roller bracket 13, and a slurry control counterweight 30; the slurry control roller 15 is on the left side of the star-shaped slurry roller 16, directly inserted into two bearings that can move in the X axis and fixed with positioning keys; the slurry control pressure roller bracket 13 is on the left front and left rear of the slurry control roller 15, and is respectively welded to the two corners where the front and rear channels of the highest X and Y axes on the left side of the base frame meet, and is composed of an upright bracket, a metal semicircular loose-leaf, a rotatable bearing and a counterweight hanger 14, and a hanging chain, see Figure 6: One page of the metal semicircular loose-leaf is fixed to the right side of the middle part of the upright bracket by screws, and the other page is fixed to the left end of the metal short section by bolts and nuts. The ball bearing is fixed to the upper side of the right end of the metal short section by screws and the counterweight hanger 14 is welded to the outer side of the right end. The slurry control pressure roller 12 is directly inserted into the bearing on the rotatable short section on the slurry control pressure roller bracket 13. The slurry control counterweight 30 is connected to the hook of the counterweight hanger 14 through the hook on its upper part during the production process of controlling the pressure roller 12 and the slurry control roller 15 to be vertically aligned and contacted up and down, and is hung on the front and rear sides of the counterweight hanger 14 by its own weight; during the process of stopping production and processing the wool winding roller, the slurry control counterweight 30 is removed from the counterweight hanger 14, and the hook placed on it is hooked with the hook on the hanging chain;

[0044] The base frame system 4 is welded by a lower base frame and an upper base frame, and the upper base frame supports the slurry system 1 and the slurry control system 3; the lower base frame is composed of a counterweight 30, a base plate, a universal roller 28 and a long rod screw 8; the universal roller 28 has a locking switch and is at the bottom of the device; the base plate is located above the universal roller 28 and below the slurry supply system 2 and the counterweight 30; the counterweight 30 is divided into two and placed in a front-to-rear symmetrical position of the feed pump 27 on the right side of the storage tank; the long rod screw 8 is screwed into the four supporting feet at the bottom of the base frame.

[0045] In order to facilitate the operation of the device and the comparison of the effect, 8 bundles of carbon fibers 21 were sized with a thermosetting 3% X sizing agent, and the implementation process included the following steps:

[0046] 1. Device in place: The device is moved by the universal roller 28 to the carbon fiber device before or after the carbon fiber sizing process or the washing and drying process. The height and levelness of the device are adjusted by fixing the X-axis level 5, the Y-axis level 6, and the long rod screw 8 to complete the device in place;

[0047] 2. Thermosetting sizing agent supply: The pneumatic feed pump 27 below the circulating feed tank 19 draws sizing agent from the bottom of the sizing agent storage tank 11, and is divided into two parts through the sizing agent feed pipe 20, and flows down from the middle position of the star-shaped guide roller 17 and the star-shaped sizing roller 16, respectively, and enters and fills the surface grooves of the two star-shaped rollers, ensuring that the two rollers are fully wetted by the sizing agent before flowing into the sizing tank 19. The pump supply of sizing agent is controlled by the regulating valve 23 in front of the pneumatic feed pump, and the regulating valve opening is opened until the sizing agent liquid level in the sizing tank 19 is maintained at the overflow port height. The sizing agent in the sizing tank 19 that exceeds the overflow port height of the overflow pipe 7 flows back to the sizing storage tank 11 through the overflow pipe 7.

[0048] 3. Carbon fiber sizing: The obtained carbon fiber tow is introduced into the sizing tank 19 through the star-shaped guide roller 17 for immersion sizing;

[0049] 4. Spreading and sizing: The carbon fiber impregnated with the sizing agent is then spread and sizing four times by the star-shaped sizing roller 16 on the impregnated carbon fiber tow, so that the sizing agent fully enters the carbon fiber monofilament under the impregnation tension state;

[0050] 5. Sizing control and homogenization: The carbon fiber after sizing is squeezed out by the sizing control rollers 15 and 12 to extrude excess sizing agent. The extrusion amount is controlled by the weight of the sizing control roller 12 and the total weight of the counterweights 14 on both sides. The extrusion process further expands the width of the impregnated carbon fiber and presses the sizing agent into the fiber. At the same time, the sizing amount of the carbon fiber monofilament is controlled, the excess sizing agent is squeezed out, and the sizing agent distribution on the carbon fiber monofilament is further homogenized.

[0051] 6. In the later stage of sizing production or sizing test, the sizing agent liquid level will be lower than the lower edge of the sizing roller and cannot be impregnated with the carbon fiber. At this time, the sizing pump 27 draws out the sizing agent 29 in the sizing agent storage tank 11, and completes the impregnation and expansion sizing of the carbon fiber from the star-shaped guide roller 17 and the star-shaped sizing roller 16 until the sizing tank 19 and the sizing tank in the sizing agent storage tank 11 are all used up, completing the carbon fiber sizing production or sizing test.

[0052] 7. Carbon fiber collection: After sizing, the carbon fiber enters the sizing dryer and winder for drying and winding.

[0053] 8. Carbon fiber test: Take 8 bundles of finished carbon fiber and test the tow width / hair, sizing rate deviation (CV), strength deviation (CV), unwinding property, and mesh performance of two types of carbon fiber. The results are shown in the effect comparison table 1.

[0054] Example 2

[0055] The carbon fiber industrial sizing device and method of use provided by the present invention (such as Figure 1 ), for the convenience of device operation and effect comparison, 8 bundles of carbon fiber 21 were sized with 3% PU, and the implementation process was as in the implementation process 1-7 of the embodiment. Take 8 bundles of finished carbon fiber tows; test the tow width / hair, sizing rate deviation (CV), strength deviation (CV), unwinding property, and filament mesh performance of the carbon fiber. The results are shown in the effect comparison table 1.

[0056] Example 3

[0057] The carbon fiber industrial sizing device and method of use provided by the present invention (such as Figure 1 ), for the convenience of device operation and effect comparison, 8 bundles of carbon fiber 21 were sizing with 6% PU, and the implementation process was as in Example Implementation Process 1-7. Take 8 bundles of finished carbon fiber tows, and test the tow width / hair, sizing rate deviation (CV), strength deviation (CV), unwinding property, and filament mesh performance of the two carbon fibers. The results are shown in Effect Comparison Table 1.

[0058] Example 4

[0059] The industrialized sizing device and method for using the carbon fiber of the present invention (such as Figure 1 ), for the convenience of device operation and effect comparison, 100 bundles of carbon fiber 21 were sized with 6% (3% PU + 3% X) composite sizing agent, and the implementation process was as in Example Implementation Process 1-7. 8 bundles of finished carbon fiber tows were randomly selected; 16 bundles of conventional thermosetting sizing agent X carbon fiber from a large production line were randomly selected, and the tow width / hair, sizing rate deviation (CV), strength deviation (CV), unwinding property, and filament mesh performance of the two types of carbon fibers were tested respectively. The results are shown in Effect Comparison Table 1.

[0060] Comparative Example 1

[0061] A conventional industrial sizing device was used to size 8 bundles of carbon fiber 21 with 3% thermosetting sizing agent X, and 8 bundles of finished carbon fiber tows were taken to test the tow width / hair, sizing rate deviation (CV), strength deviation (CV), unwinding property, and filament mesh performance of the carbon fiber. The results are shown in the effect comparison table 1.

[0062] Comparative Example 2

[0063] A conventional industrial sizing device was used to size 8 bundles of carbon fiber 21 with 6% thermosetting sizing agent X, and 8 bundles of finished carbon fiber tows were taken to test the tow width / hair, sizing rate deviation (CV), strength deviation (CV), unwinding property, and filament mesh performance of the carbon fiber. The results are shown in the effect comparison table 1.

[0064] Comparative Example 3

[0065] Using a conventional industrial sizing device, 8 bundles of carbon fiber 21 were sizing 6%.

[0066] After sizing with a composite sizing agent (3%X+3%PU), 8 finished carbon fiber tows were taken to test the tow width / hair, sizing rate deviation (CV), strength deviation (CV), unwinding property, and filament separation performance of the carbon fiber. The results are shown in Table 1.

[0067] Table 1. Effect comparison table

[0068]

[0069] From the above comparison, it can be seen that the industrial sizing device for carbon fiber of the present invention, whether it is a thermoplastic sizing agent, a thermosetting sizing agent or a composite sizing agent, shows the characteristics of high sizing efficiency, uniform sizing and stable sizing rate. In addition, the sizing device of the present invention does not generate waste liquid, consumes no electrical energy, the production process is energy-saving and environmentally friendly, and the obtained carbon fiber filament (mesh) has good performance.

[0070] Experiments show that the present invention is used for carbon fiber sizing, and the carbon fiber bundle has high spreading efficiency, fast sizing agent impregnation speed, uniform sizing and good single-filament mesh separation performance, and the entire sizing production process consumes no electricity and discharges no waste sizing agent.

Claims

1. A carbon fiber industrial sizing device, characterized in that The device is composed of four parts: a sizing system (1), a sizing supply system (2), a sizing control system (3) and a base frame system (4); the sizing system (1) is located at the upper part of the device; the sizing agent storage tank and the circulating feed pump of the sizing supply system (2) are located directly below the sizing system (1); the sizing control system (3) is located at the upper left part of the sizing system (1); the lower part of the base frame system (4) accommodates the sizing supply system (2); the upper part of the base frame system (4) supports the sizing supply system (2) and the sizing control system (3), and is located at the bottom and periphery of the above three systems; The sizing system (1) is composed of a sizing agent feed pipe (18), a star-shaped guide roller (17), a star-shaped sizing roller (16), an X-axis level (5), a Y-axis level (6), and a sizing trough (19). The sizing trough (19) is a sizing trough with an arc-shaped concave middle portion at the bottom of the trough, and is located at the bottom of the sizing system (1). The left and right sides of the sizing trough (19) are each provided with two supporting ears, and the four supporting ears place the sizing trough (19) on two channel steels in the highest Y-axis direction of the base frame. The overflow pipe (7) is a short welded pipe vertically passing through the flat bottom of the left front of the arc concave sizing trough; the overflow port of the overflow pipe (7) is lower than the slot of the sizing trough (19); the large circulation feed pipe (24) of the sizing trough is located at the center of the bottom of the arc concave sizing trough (19), and is a short welded section with a ball valve vertically downward; the star-shaped guide roller (17) is located at the upper right part of the arc concave sizing trough (19), and is directly inserted into the rightmost of the two channel steels before and after the highest X axis fastened by bolts to the base frame system (4). The star-shaped guide roller (17) and the bearing are fixed by a positioning key; the star-shaped sizing roller (16) is located in the upper middle part of the arc-concave sizing groove (19), and is directly inserted into the two supporting bearings in the middle part of the two channel steels in front and behind the highest X-axis of the base frame fastened by bolts, and the star-shaped guide roller (17) is fixed by a positioning key, and the roller axes of the star-shaped guide roller (17) and the star-shaped sizing roller (16) are at the same level; the sizing agent feeding pipe (18) is connected from the right side behind the sizing groove (19) , reaching the space above the sizing system (1) from bottom to top, splitting into two parts to the left and right, and then extending forward to the middle position just above the star-shaped sizing roller (16) and the star-shaped guide roller (17), with the pipe mouth facing downward; the sizing agent feed pipe (18) is fixed to a section of channel steel between the star-shaped sizing roller (16) and the star-shaped guide roller (17) by a clamp behind the sizing trough (19); the X-axis level (5) and the Y-axis level (6) are respectively fixed to the front channel steel and the left channel steel in the highest X and Y directions of the base frame by bolts; The slurry supply system (2) is composed of a sizing agent storage tank (11), a large circulation feed pipe (24), a reflux pipe (10), a feed pump (27), a circulation feed pipe (22), a feed pump feed pipe (21), a feed pump feed hose (26) and a feed pump feed hose (25). The sizing agent storage tank (11) is a rectangular storage tank placed on the left side of the base frame bottom plate; the large circulation feed pipe (24) is welded to the inner wall of the rear side of the sizing agent storage tank (11), and its lower pipe mouth is inserted into the bottom of the sizing agent storage tank (11), and its upper part is higher than the tank slot and is divided into two, one horizontal pipe is the feed pump feed pipe (21), which is connected to the feed pump feed hose (26) quick connector, and one vertical short pipe is connected to the circulation feed pipe (11). The pipe (22) is connected through a hose (29) with a quick-connect head; the reflux pipe (10) is welded to the left inner wall of the storage tank, and its lower pipe opening is inserted above the liquid level in the storage tank. The upper pipe opening of the reflux pipe (10) is higher than the slot of the storage tank and is connected to the lower pipe opening of the overflow pipe (7) through a hose (29) with a quick-connect head; the feed pump (27) is a diaphragm pump, which is placed in the middle of the right side of the sizing agent storage tank (11) on the bottom plate of the base frame; the inlet of the feed pump (27) is connected to the large circulation feed pipe (24) by a plastic hose, and the outlet of the feed pump (27) is threadedly connected to the metal hose of the sizing agent feed pipe (18); the feed pump (27) is externally connected to compressed air; The slurry control system (3) is located at the upper left of the star-shaped slurry roller (16) of the slurry system (1), and is composed of a slurry control roller (15), a slurry control pressure roller (12), a slurry control pressure roller bracket (13), and a slurry control counterweight (30); the slurry control roller (15) is located on the left side of the star-shaped slurry roller (16), is directly inserted into two bearings that can move in the X-axis and is fixed by a positioning key; the slurry control pressure roller bracket (13) is located at the left front and left rear of the slurry control roller (15), and is respectively welded to the two corners where the front and rear channels of the highest X and Y axes on the left side of the base frame intersect, and is composed of an upright bracket, a metal semicircular loose-leaf, a rotatable bearing and a counterweight hanger (14), and a hanging chain: one page of the metal semicircular loose-leaf is fixed to the On the right side of the middle of the upright bracket, another page is fixed to the left end of the metal short section by bolts and nuts, a ball bearing is fixed to the top of the right end of the metal short section by screws and a counterweight hanger (14) is welded to the outer side of the right end, the slurry control roller (12) is directly inserted into the bearing on the rotatable short section on the slurry control roller bracket (13), and the slurry control counterweight (30) is connected to the hook of the counterweight hanger (14) through the hook on its upper part during the production process when the slurry control roller (12) and the slurry control roller (15) are vertically aligned and contacted up and down, and is hung on the front and back sides of the counterweight hanger (14) by its own weight; during the process of stopping production and processing the wool winding roller, the slurry control counterweight (30) is removed from the counterweight hanger (14), and the hook placed thereon is hooked with the hook on the hanging chain; The base frame system (4) is welded by a lower base frame and an upper base frame, and the upper base frame supports the sizing system (1) and the slurry control system (3); the lower base frame is composed of a counterweight, a bottom plate, a universal roller (28) and a long rod screw (8); the universal roller (28) is provided with a locking switch and is located at the bottom of the device; the bottom plate is located above the universal roller (28) and below the slurry supply system (2) and the counterweight; the counterweight is divided into two and is placed at a front-to-rear symmetrical position of the feed pump (27) on the right side of the storage tank; the long rod screw (8) is screwed into the four legs at the bottom of the base frame; the pump supply of the sizing agent is controlled by a regulating valve (23) in front of the pneumatic feed pump.

2. The carbon fiber industrial sizing device according to claim 1, characterized in that: The base frame system (4) is made of channel steel; the sizing agent contact device is made of carbon fiber contact material, the plate wall thickness is 3 mm and reinforced; the carbon fiber contact material is chromium-plated and has a mirror finish; the bearing ball is made of hard stainless steel; the quick head is made of carbon fiber contact material; all hoses are made of wire-reinforced transparent plastic.

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