Carbon fiber yarn sizing and dipping equipment and method

Abstract

The invention relates to carbon fiber yarn sizing and dipping equipment and method, which are used for producing carbon fiber yarn infiltrated by polyether-ether-ketone resin, and the equipment comprises an unwinding device, a sizing tank, a dipping tank and a winding device, the unreeling device, the sizing tank, the dipping tank and the reeling device are sequentially arranged from front to back according to the production sequence, and a guide roller is arranged between every two adjacent devices. Wherein the unreeling device comprises a roller used for storing carbon fiber raw materials in advance; a mixed solution with dichloromethane as a solvent and polyether-ether-ketone as a solute is pre-stored in the sizing tank and is used for sizing the carbon fibers, and the sized carbon fibers are obtained; turbid liquid of polyether-ether-ketone resin is pre-stored in the dipping tank to serve as slurry and used for dipping the sized carbon fiber yarn, and a carbon fiber yarn primary finished product smeared with the stable polyether-ether-ketone resin slurry is obtained; the winder comprises a roller used for collecting a final finished product of the carbon fiber yarn coated with the stable polyether-ether-ketone resin slurry.

Description

Technical Field

[0001] The invention relates to the technical field of composite materials, and in particular to a carbon fiber sizing and impregnation device and method. Background Art

[0002] Thermoplastic fiber reinforced composites have been widely used in military technology fields such as aerospace and weapons and equipment due to their light weight, high strength, high modulus, and corrosion resistance. However, the interfacial properties of fibers and resins in thermoplastic fiber reinforced composites are the key factors that determine the mechanical properties of composites. Pre-impregnation and sizing of yarns can effectively improve their interfacial properties with resins. With the development of composite material processing technology, weaving technology has gradually become an important candidate process for the manufacture of fiber-reinforced polymer composites. The manufacturing technology uses a loom to weave fibers along a serpentine or circular path to form a structurally stable fabric preform. Compared with traditional unidirectional fiber laminated composites, fabric-reinforced composites are superior in mechanical properties, impact resistance, and flexibility. Due to the specific distribution of yarns in the microstructure, fabric-reinforced composites have excellent mechanical properties. The integrated reinforcement structure of multi-directional fibers fundamentally overcomes the fatal weaknesses of low interlayer strength and easy delamination of layered composites. Multi-directional fiber composites exhibit high specific strength, large specific modulus, high impact resistance and tolerance, and can form complex configurations. However, weaving technology has high requirements for carbon fiber prepreg. In order to allow the resin to be better impregnated into the carbon fiber bundle, the preparation process usually requires steps such as desizing, yarn spreading, sizing, and impregnation, so that the carbon fiber bundle is widened, the bundle area is increased, and the thickness is thinned, thereby improving the state of the fiber bundle so that the resin matrix can be fully impregnated.

[0003] Currently, there is a lack of equipment and methods for sizing and impregnating carbon fiber filaments, which limits the further development of carbon fiber prepreg reinforced composite materials. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a carbon fiber filament sizing and impregnation device and method, which is used to solve the problem that there is currently a lack of equipment and sizing and impregnation methods for carbon fiber filaments, which limits the further development of carbon fiber prepreg reinforced composite materials.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention discloses a carbon fiber sizing and impregnation device for producing carbon fiber filaments impregnated with polyetheretherketone resin, comprising:

[0007] The feeding device includes an unwinder;

[0008] The sizing and dipping device comprises a sizing tank and a dipping tank;

[0009] The delivery device includes a reel;

[0010] The unwinder, the sizing tank, the dipping tank and the rewinder are arranged in sequence from front to back according to the production sequence, and guide rollers are arranged between adjacent devices;

[0011] Wherein, the unwinder comprises a roller for pre-storing the carbon fiber filament raw material;

[0012] The sizing tank is pre-stored with a mixed solution with dichloromethane as a solvent and polyetheretherketone as a solute, which is used to size the carbon fiber filaments to obtain the sized carbon fiber filaments;

[0013] The impregnation tank is pre-stored with a suspension of polyetheretherketone resin as a slurry for impregnating the sized carbon fiber filaments to obtain a carbon fiber filament pre-finished product coated with a stable polyetheretherketone resin slurry;

[0014] The winder comprises a roller for collecting the final product of the carbon fiber filaments coated with a stable polyetheretherketone resin slurry.

[0015] Furthermore, the sizing and impregnation device further comprises a first squeezing roller and a second squeezing roller.

[0016] The first squeezing roller is arranged above the sizing tank and the impregnation tank, and is formed by two parallel rollers arranged in pairs with a gap between the two parallel rollers.

[0017] The gap between the two rollers of the first squeezing roller is used to pass the sized carbon fiber filaments so as to squeeze out the excess slurry on the sized carbon fiber filaments;

[0018] The second squeezing roller is arranged above the output end of the impregnation tank and is formed by two parallel rollers arranged in pairs with a gap between the two parallel rollers.

[0019] The gap between the two rollers of the second squeezing roller is used to pass the carbon fiber filaments pre-finished product coated with stable polyetheretherketone resin slurry, so as to squeeze out the excess slurry on the carbon fiber filaments pre-finished product coated with stable polyetheretherketone resin slurry.

[0020] Furthermore, the feeding device further comprises a limiting roller array and a first oven,

[0021] The unwinder, the limiting roller array and the first oven are arranged in sequence from front to back according to the production sequence.

[0022] The limiting roller array includes four vertical rollers, which are used to limit the running track of the carbon fiber filament raw material;

[0023] The first oven is provided with a wire inlet and a wire outlet at both ends thereof, and a heating resistance wire is provided therein for removing the original resin on the surface of the carbon fiber raw material passing therethrough to obtain the carbon fiber raw material with the original resin removed.

[0024] Furthermore, the delivery device also includes a second oven and a wire arrangement device.

[0025] The second oven, the cable arranging device and the reel are arranged in sequence from front to back according to the production sequence.

[0026] The second oven is provided with a wire inlet and a wire outlet at both ends, and a heating resistor wire is provided inside the second oven for drying the excess slurry on the surface of the carbon fiber filaments pre-finished product coated with the stable polyetheretherketone resin slurry passing through the second oven to obtain a dry carbon fiber filaments pre-finished product;

[0027] The cable arrangement device is equipped with a motor and can move forward and backward to evenly arrange the dry carbon fiber filaments to obtain evenly arranged dry carbon fiber filaments.

[0028] The roller of the winder is equipped with a motor for collecting the evenly arranged dry carbon fiber filaments to obtain the final product of carbon fiber filaments impregnated with polyetheretherketone resin.

[0029] Furthermore, it also includes a box body, and a vertical plate is arranged on the side of the box body.

[0030] The sizing tank and the dipping tank are arranged side by side at the lower left corner of the vertical plate.

[0031] The unwinder, the limiting roller array, and the first oven are sequentially arranged on the upper part of the vertical plate from right to left.

[0032] The second oven, the cable arranger, and the winder are sequentially arranged at the lower part of the vertical plate from right to left.

[0033] Furthermore, it also includes a guide roller assembly, wherein the guide roller assembly includes a first guide roller and a second guide roller.

[0034] The first guide roller is arranged between the unwinder and the limiting roller array, and is used to transport the carbon fiber filament raw material pre-stored in the unwinder to the limiting roller array;

[0035] The second guide roller is disposed between the second oven and the wire arranging device, and is used to transport the dry carbon fiber filaments from the wire outlet of the second oven to the wire arranging device.

[0036] Furthermore, the guide roller assembly further includes a third guide roller, a fourth guide roller, a fifth guide roller, a sixth guide roller and a seventh guide roller.

[0037] The third guide roller, the fourth guide roller and the fifth guide roller are arranged in sequence from right to left on the extension line of the silk outlet of the first oven.

[0038] The fifth guide roller, the sixth guide roller and the seventh guide roller are arranged above the sizing trough in sequence from top to bottom, and the seventh guide roller is located directly above the sizing trough.

[0039] Furthermore, the guide roller assembly further comprises an electric guide roller, and the electric guide roller is arranged in an area enclosed by a line connecting the third guide roller and the fifth guide roller and a line connecting the fifth guide roller and the seventh guide roller.

[0040] The electric push rod is provided on the electric push guide, and the electric push rod is provided with a motor and can move up and down, and is used to unfold the carbon fiber filaments from which the original resin has been removed;

[0041] The guide roller assembly also includes an eighth guide roller, which is arranged between the second squeezing roller and the wire inlet of the second oven.

[0042] Furthermore, it also includes a console, a controller is arranged inside the console, a display screen is arranged outside the console, the roller of the unwinder is configured with a motor, the motor of the unwinder, the motor of the electric push rod, the motor of the cable arranger, the motor of the winder, the heating resistance wire of the first oven, the heating resistance wire of the second oven, and the display screen are respectively connected to the controller through wires.

[0043] In a second aspect, the present invention also discloses a method for sizing and impregnating carbon fiber filaments, using the above-mentioned carbon fiber filament sizing and impregnating equipment, the method comprises:

[0044] The carbon fiber filament raw materials pre-stored in the unwinder are introduced into the sizing tank through the guide roller, and the carbon fiber filaments are sized by a mixed solution of dichloromethane as a solvent and polyetheretherketone as a solute in the sizing tank to obtain sized carbon fiber filaments;

[0045] When the sized carbon fiber filaments pass through the impregnation tank, the suspension of polyetheretherketone resin pre-stored in the impregnation tank impregnates the sized carbon fiber filaments, so that the polyetheretherketone resin and the dichloromethane solution of polyetheretherketone undergo a chemical reaction, thereby obtaining a carbon fiber filament pre-finished product coated with a stable polyetheretherketone resin slurry;

[0046] The carbon fiber filaments coated with the stable polyetheretherketone resin slurry are finally collected by the winder.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] (I) The present invention discloses a carbon fiber sizing and impregnation device, comprising an unwinder, a sizing tank, an impregnation tank and a reel, wherein the unwinder, the sizing tank, the impregnation tank and the reel are arranged in sequence from front to back according to the production sequence, and a guide roller is arranged between adjacent devices; wherein the unwinder comprises a roller for pre-storing the carbon fiber raw material; the sizing tank is pre-stored with a mixed solution with dichloromethane as a solvent and polyetheretherketone as a solute, which is used to size the carbon fiber to obtain the sized carbon fiber; the impregnation tank is pre-stored with a suspension of polyetheretherketone resin as a slurry, which is used to impregnate the sized carbon fiber, so that the polyetheretherketone resin reacts chemically with the dichloromethane solution of polyetheretherketone, and obtains the carbon fiber pre-finished product coated with a stable polyetheretherketone resin slurry; the reel comprises a roller for collecting the final product of the carbon fiber slurry coated with a stable polyetheretherketone resin slurry.

[0049] (ii) The present invention discloses a carbon fiber sizing and impregnation device, wherein guide rollers are arranged between adjacent devices, and the carbon fiber raw materials are continuously guided in one direction from the unwinder in the order of a limiting roller array, a first oven, a sizing tank, a first slurry squeezing roller, an impregnation tank, a second slurry squeezing roller, a second oven, and a wire arranging device, and finally reach the winder. Therefore, the device integrates unwinding, desizing, yarn spreading, sizing, impregnation, drying tank and other devices in one, wherein the unwinding device can provide a constant tension, the desizing device can completely remove the resin attached to the carbon fiber before leaving the factory, the yarn spreading device can fully unfold the continuous carbon fiber, the sizing device can fully attach the resin sizing agent to the surface of the carbon fiber, the impregnation device can attach the resin suspension to the surface of the carbon fiber and combine it with the carbon fiber through the sizing agent, and the drying tank can dry the pre-impregnated carbon fiber. The device can make the resin matrix fully and evenly impregnate into the interior of the carbon fiber bundle, thus overcoming the problems of insufficient resin content and uneven distribution in the composite materials prepared by the prior art. The carbon fiber sizing and impregnation equipment disclosed in the present invention can evenly spread the carbon fiber and allow the resin slurry to fully enter the carbon fiber bundle during the preparation of the carbon fiber prepreg, thereby increasing the resin content inside the carbon fiber bundle of the final product, and making the resin distribution and the carbon fiber in the prepreg tape evenly dispersed, thereby improving the mechanical properties and overall structural strength of the prepreg material. In addition, the equipment occupies a small area, has low cost, is noiseless, and is easy to start.

[0050] (III) The present invention discloses a method for sizing and impregnating carbon fiber filaments, which includes the following main steps: the carbon fiber filament raw materials pre-stored in the unwinder are introduced into the sizing tank through the guide roller, and the carbon fiber filaments are sized by the mixed solution of dichloromethane as solvent and polyetheretherketone as solute in the sizing tank to obtain the sized carbon fiber filaments; when the sized carbon fiber filaments pass through the impregnation tank, the suspension of polyetheretherketone resin pre-stored in the impregnation tank is impregnated with the sized carbon fiber filaments, so that the polyetheretherketone resin and the dichloromethane solution of polyetheretherketone react chemically to obtain the carbon fiber filaments coated with stable polyetheretherketone resin slurry; the carbon fiber filaments coated with stable polyetheretherketone resin slurry are finally collected by the winder. The unidirectional continuous carbon fiber prepreg prepared by the equipment can be used for the manufacture of carbon fiber yarn, carbon fiber cloth, etc. Compared with traditional carbon fiber, the resin after pre-impregnation by the equipment has a protective and reinforcing effect on the carbon fiber, avoiding the phenomenon of carbon fiber breakage and carbon fiber filament scattering in traditional processing technology, and effectively protecting the integrity of the fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a schematic structural diagram of a carbon fiber sizing and impregnation device provided in Example 1 of the present invention;

[0052] Figure 2 yes Figure 1 Schematic diagram of the structure of the carbon fiber sizing and impregnation equipment with a console.

[0053] Description of reference numerals: 100 - box body, 101 - vertical plate;

[0054] 1-feeding device, 11-unwinder, 12-limiting roller array, 13-first oven;

[0055] 2-sizing and impregnating device, 20-waste liquid tank, 21-sizing tank, 22-first squeezing roller, 23-impregnation tank, 24-second squeezing roller;

[0056] 3-feeding device, 31-second oven, 32-cable arranging device, 33-winding device;

[0057] 4-guide roller assembly, 41-first guide roller, 42-second guide roller;

[0058] 50-electric guide roller, 501-electric push rod, 51-third guide roller, 52-fourth guide roller, 53-fifth guide roller, 54-sixth guide roller, 55-seventh guide roller, 56-eighth guide roller;

[0059] 6-console, 60-display. DETAILED DESCRIPTION

[0060] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0061] In order to solve the problem that there is currently a lack of equipment and methods for sizing and impregnating carbon fiber filaments, which limits the further development of carbon fiber prepreg reinforced composite materials, the present invention discloses a carbon fiber filament sizing and impregnation equipment, including an unwinder, a sizing tank, an impregnation tank and a reel, wherein the unwinder, the sizing tank, the impregnation tank and the reel are arranged in sequence from front to back according to the production sequence, and a guide roller is arranged between adjacent equipment; wherein the unwinder includes a roller for pre-storing carbon fiber filament raw materials; the sizing tank is pre-stored with A mixed solution with dichloromethane as solvent and polyetheretherketone as solute is used to size carbon fiber filaments to obtain sized carbon fiber filaments; a suspension of polyetheretherketone resin is pre-stored in an impregnation tank as a slurry, which is used to impregnate the sized carbon fiber filaments, so that the polyetheretherketone resin and the dichloromethane solution of polyetheretherketone undergo a chemical reaction to obtain a preliminary finished product of carbon fiber filaments coated with a stable polyetheretherketone resin slurry; and a winder includes a roller for collecting the final finished product of carbon fiber filaments coated with a stable polyetheretherketone resin slurry.

[0062] Example 1: A carbon fiber impregnated with polyetheretherketone resin

[0063] Embodiment 1 of the present invention provides a carbon fiber filament impregnated with polyetheretherketone resin, which is formed by impregnating the outer wall of the carbon fiber filament with polyetheretherketone resin.

[0064] Among them, the carbon fiber filament is 1 3k / T700 carbon fiber;

[0065] The resin is 2 wt% of a dichloromethane solution mixed with polyetheretherketone and 25 wt% of a polyetheretherketone resin;

[0066] Other parameters are as follows: the resin content of the prepreg is greater than 40%, the drape is greater than 85%, the uniformity is as high as more than 99%, and the tensile strength is as high as more than 5000MPa.

[0067] Example 2: A carbon fiber sizing and impregnation device

[0068] Embodiment 2 of the present invention provides a carbon fiber sizing and impregnation device for producing the carbon fiber slurry impregnated with the polyetheretherketone resin of Embodiment 1. The structure and connection relationship thereof are described in detail below.

[0069] refer to Figure 1 and Figure 2The carbon fiber sizing and impregnation device comprises a feeding device 1, a sizing and impregnation device 2, a feeding device 3 and a guide assembly 4.

[0070] The feeding device 1 includes an unwinder 11, a limiting roller array 12 and a first oven 13.

[0071] The sizing and impregnation device 2 comprises a sizing tank 21, a first squeezing roller 22, an impregnation tank 23 and a second squeezing roller 24.

[0072] The delivery device 3 includes a second oven 33, a wire arrangement device 32, and a reel 31.

[0073] The unwinder 11, the limiting roller array 12, the first oven 13 of the feeding device 1, the sizing tank 21, the first sizing roller 22, the immersion tank 23 and the second sizing roller 24 of the sizing and impregnation device 2, and the second oven 33, the wire arrangement device 32 and the winder 31 of the delivery device 3 are arranged in sequence from front to back in the production sequence, and guide rollers are arranged between adjacent devices.

[0074] The unwinder 11 includes a roller for pre-storing the carbon fiber raw material. Specifically, the carbon fiber raw material is a 3k / T700 carbon fiber (CF) yarn. Furthermore, the roller of the unwinder 11 is equipped with a motor. Furthermore, the unwinder 11 is equipped with a tension controller, which cooperates with the motor of the unwinder 11, and the tension controller outputs a tension of 1.5N.

[0075] The limiting roller array 12 includes four vertical rollers in a tic-tac-toe shape, which are used to limit the running track of the carbon fiber raw material;

[0076] The first oven 13 is provided with a wire inlet and a wire outlet at both ends thereof, and a heating resistor wire is provided therein for removing the original resin on the surface of the carbon fiber raw material passing therethrough to obtain the carbon fiber raw material without the original resin. Specifically, the temperature setting range of the first oven 13 is 0-400°C.

[0077] The sizing tank 21 contains a mixed solution (polyetheretherketone dichloromethane solution) with dichloromethane as solvent and polyetheretherketone as solute, and is used to size the carbon fiber filaments after the unfolding and removal of the original resin to obtain the sized carbon fiber filaments;

[0078] The first squeezing roller 22 is arranged above the sizing tank 21 and the impregnation tank 23, and is formed by two parallel rollers arranged in pairs with a gap between the two parallel rollers.

[0079] The gap between the two rollers of the first squeezing roller 22 is used to pass the sized carbon fiber filaments so as to squeeze out the excess slurry on the sized carbon fiber filaments;

[0080] The impregnation tank 23 contains a suspension of polyetheretherketone resin as a slurry for impregnating the sized carbon fiber filaments to allow the polyetheretherketone resin to react chemically with the dichloromethane solution of polyetheretherketone to obtain a carbon fiber filament pre-finished product coated with a stable polyetheretherketone resin slurry;

[0081] The second squeezing roller 24 is arranged above the output end of the immersion tank 23 and is formed by two parallel rollers arranged in pairs with a gap between the two parallel rollers.

[0082] The gap between the two rollers of the second squeezing roller 24 is used to pass the carbon fiber filaments pre-finished product coated with a stable polyetheretherketone resin slurry, so as to squeeze out the excess slurry on the carbon fiber filaments pre-finished product coated with a stable polyetheretherketone resin slurry;

[0083] The second oven 33 is provided with a wire inlet and a wire outlet at both ends thereof, and a heating resistor wire is provided therein for drying the excess water on the surface of the carbon fiber filaments pre-finished product coated with the stable polyetheretherketone resin slurry passing therethrough, so as to obtain a dry carbon fiber filaments pre-finished product;

[0084] The wire arranging device 32 is equipped with a motor and can move forward and backward to arrange the dry carbon fiber filaments evenly to obtain evenly arranged dry carbon fiber filaments.

[0085] The winder 31 includes a roller for collecting the uniformly arranged dry carbon fiber filaments, and finally obtaining the final product of the carbon fiber filaments impregnated with polyetheretherketone resin. Specifically, the roller of the winder 31 is equipped with a motor. When the speed of the motor of the winder 31 is set to 0.2m / s, the roller can be driven to rotate, thereby collecting the pre-impregnated and uniformly arranged dry carbon fiber filaments.

[0086] Specifically, the temperature of the second oven 33 is set in the range of 0-400°C.

[0087] Guide rollers are arranged between adjacent devices to guide the carbon fiber filament raw materials from the unwinder 11 in a unidirectional and continuous manner in the order of the limiting roller array 12, the first oven 13, the sizing tank 21, the first slurry squeezing roller 22, the impregnation tank 23, the second slurry squeezing roller 24, the second oven 33, and the wire arrangement device 32, and finally reach the winder 31.

[0088] Specifically, in order to facilitate the placement of the above components, the carbon fiber sizing and impregnation equipment further includes a box body 100, and a vertical plate 101 is arranged on the side of the box body 100.

[0089] The sizing tank 21 and the dipping tank 23 are arranged side by side at the lower left corner of the vertical plate 101. Figure 1 and Figure 2 As shown,

[0090] The unwinder 11, the limiting roller array 12, and the first oven 13 are sequentially arranged on the upper part of the vertical plate 101 from right to left. Figure 1 and Figure 2 As shown,

[0091] The second oven 33, the cable arrangement device 32, and the reel 31 are sequentially arranged at the lower part of the vertical plate 101 from right to left. Figure 1 and Figure 2 shown.

[0092] Specifically, in order to prevent the liquid in the sizing tank 21 and the immersion tank 23 from overflowing and flowing onto the surface of the box body 100, a waste liquid tank 20 is provided directly below the sizing tank 21 and the immersion tank 23, and the waste liquid tank 20 is used to receive the liquid overflowing from the sizing tank 21 and the immersion tank 23.

[0093] In order to facilitate the feeding and feeding of carbon fiber filaments, the guide roller assembly 4 includes a first guide roller 41 and a second guide roller 42.

[0094] The first guide roller 41 is disposed between the unwinder 11 and the limiting roller array 12, and is used to transport the carbon fiber filament raw material pre-stored in the unwinder 11 to the limiting roller array 12;

[0095] The second guide roller 42 is disposed between the second oven 33 and the wire arranging device 32 , and is used to transport the dry carbon fiber filaments from the wire outlet of the second oven 33 to the wire arranging device 32 .

[0096] In order to transport the carbon fiber filaments with the original resin removed from the outlet of the first oven 13 to the sizing tank 21, the guide roller assembly 4 further includes a third guide roller 51, a fourth guide roller 52, a fifth guide roller 53, a sixth guide roller 54 and a seventh guide roller 55.

[0097] The third guide roller 51, the fourth guide roller 52, and the fifth guide roller 53 are sequentially arranged from right to left on the extension line of the silk outlet of the first oven 13.

[0098] The fifth guide roller 53 , the sixth guide roller 54 and the seventh guide roller 55 are sequentially arranged above the sizing trough 21 from top to bottom, and the seventh guide roller 55 is located directly above the sizing trough 21 .

[0099] In order to unfold the carbon fiber filaments on the roller after removing the original resin, the guide roller assembly 4 further includes an electric guide roller 50, which is arranged in an area surrounded by a line connecting the third guide roller 51 and the fifth guide roller 53 and a line connecting the fifth guide roller 53 and the seventh guide roller 55.

[0100] The electric push rod 50 is provided on the electric push guide 50. The electric push rod 501 is provided with a motor and can move up and down to unfold the carbon fiber filaments with the original resin removed so as to apply the polyetheretherketone resin slurry in the subsequent process.

[0101] In order to transport the carbon fiber filaments coated with stable polyetheretherketone resin slurry in the gap between the two rollers of the second squeezing roller 24 to the wire inlet of the second oven 33, the guide roller assembly 4 also includes an eighth guide roller 56, which is arranged between the second squeezing roller 24 and the wire inlet of the second oven 33.

[0102] In order to improve the control of the carbon fiber sizing and impregnation equipment, an optimization measure is also added. A control console 6 is arranged at the bottom of the carbon fiber sizing and impregnation equipment.

[0103] The console 6 is provided with a controller inside and a display screen 60 outside.

[0104] The motor of the unwinder 11, the motor of the electric push rod 501, the motor of the cable arranger 32, the motor of the rewinder 31, the heating resistor wire of the first oven 13, the heating resistor wire of the second oven 33, and the display screen 60 are respectively connected to the controller through wires.

[0105] Example 3: A method for sizing and impregnating carbon fiber yarn

[0106] Embodiment 3 of the present invention provides a carbon fiber sizing and impregnation method, using the carbon fiber sizing and impregnation equipment of embodiment 2 to prepare the carbon fiber impregnated with the polyetheretherketone resin of embodiment 1. Before starting the equipment, a dichloromethane solution of polyetheretherketone is added to the sizing tank 21 as a sizing agent, and a suspension of a uniformly dispersed polyetheretherketone resin (also known as PEEK turbid solution) is added to the impregnation tank 23. The method comprises the following steps:

[0107] Step A: The carbon fiber filament raw material pre-stored in the unwinder 11 is introduced into the sizing tank 21 through a guide roller, and the carbon fiber filament is sized by a mixed solution of dichloromethane as a solvent and polyetheretherketone as a solute in the sizing tank 21 to obtain the sized carbon fiber filament.

[0108] Specifically, the step A comprises the following steps:

[0109] Step A1: The carbon fiber raw material pre-stored in the unwinder 11 is guided to the limiting roller array 12 through the first guide roller 41. The limiting roller array 12 limits the running track of the carbon fiber raw material and guides the carbon fiber raw material to the first oven 13;

[0110] Step A2: the first oven 13 removes the original resin on the surface of the carbon fiber filament raw material passing therethrough, thereby obtaining the carbon fiber filaments from which the original resin has been removed;

[0111] Step A3: The carbon fiber filaments with the original resin removed are guided to the sizing tank 21 in sequence through the third guide roller 51, the fourth guide roller 52, the fifth guide roller 53, the electric guide roller 50, the sixth guide roller 54 and the seventh guide roller 55 of the guide roller assembly 4. When passing through the electric guide roller 50, under the action of the electric push rod 501, the electric guide roller 50 moves up and down to unfold the carbon fiber filaments with the original resin removed on the roller roller;

[0112] Step A4: The sizing tank 21 sizing the unfolded carbon fiber filaments from which the original resin has been removed to obtain sized carbon fiber filaments.

[0113] Step B: When the sized carbon fiber filaments pass through the impregnation tank 23, the suspension of polyetheretherketone resin pre-stored in the impregnation tank 23 is used to impregnate the sized carbon fiber filaments, so that the polyetheretherketone resin and the dichloromethane solution of polyetheretherketone undergo a chemical reaction to obtain a preliminary finished carbon fiber filament coated with a stable polyetheretherketone resin slurry.

[0114] Specifically, the step B comprises the following steps:

[0115] Step B1: the sizing tank 21 sizing the carbon fiber filaments after the unfolding and removal of the original resin to obtain sizing carbon fiber filaments;

[0116] Step B2: The sizing carbon fiber filaments are squeezed when passing through the gap between the two rollers of the first squeezing roller 22, and the excess slurry on the sizing carbon fiber filaments is squeezed out;

[0117] Step B3: the sizing carbon fiber filaments are immersed in the immersion tank 23 to make the polyetheretherketone resin and the dichloromethane solution of polyetheretherketone chemically react to obtain a carbon fiber filament pre-finished product coated with a stable polyetheretherketone resin slurry;

[0118] Step B4: The carbon fiber filaments pre-finished product coated with the stable polyetheretherketone resin slurry is squeezed when passing through the gap between the two rollers of the second squeezing roller 24, and the excess slurry on the carbon fiber filaments pre-finished product coated with the stable polyetheretherketone resin slurry is squeezed out.

[0119] Step C: The carbon fiber filaments coated with the stable polyetheretherketone resin slurry are finally collected by the winder 31 .

[0120] Specifically, step C comprises the following steps:

[0121] Step C1: The carbon fiber filaments pre-finished product coated with the stable polyetheretherketone resin slurry from which the excess slurry is squeezed out are guided to the inlet of the second oven 33 through the eighth guide roller 56. When passing through the second oven 33, the excess slurry on the surface of the carbon fiber filaments pre-finished product coated with the stable polyetheretherketone resin slurry is dried to obtain a dry carbon fiber filament pre-finished product and flow out from the outlet of the second oven 33.

[0122] Step C2: The dry carbon fiber filaments flowing out of the filament outlet of the second oven 33 are guided to the wire arrangement device 32 through the second guide roller 42, and the wire arrangement device 32 arranges the dry carbon fiber filaments uniformly to obtain uniformly arranged dry carbon fiber filaments;

[0123] Step C3: The winder 31 collects the uniformly arranged dry carbon fiber filaments to obtain the final carbon fiber filaments impregnated with polyetheretherketone resin.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A carbon fiber sizing and impregnation device for producing carbon fiber filaments impregnated with polyetheretherketone resin, characterized in that: include The feeding device (1) comprises an unwinder (11); The sizing and impregnation device (2) comprises a sizing tank (21) and an impregnation tank (23); The delivery device (3) comprises a reel (31); The unwinder (11), the sizing tank (21), the dipping tank (23) and the rewinder (31) are arranged in sequence from front to back in a production sequence, and guide rollers are arranged between adjacent devices; Wherein, the unwinder (11) comprises a roller for pre-storing the carbon fiber filament raw material; The sizing tank (21) contains a mixed solution with dichloromethane as solvent and polyetheretherketone as solute, which is used to size the carbon fiber filaments to obtain the sized carbon fiber filaments; The impregnation tank (23) contains a suspension of polyetheretherketone resin as a slurry for impregnating the sized carbon fiber filaments to obtain a carbon fiber filament pre-finished product coated with a stable polyetheretherketone resin slurry; The winder (31) comprises a roller for collecting the final product of the carbon fiber filaments coated with a stable polyetheretherketone resin slurry.

2. The carbon fiber sizing and impregnation equipment according to claim 1, characterized in that: The sizing and impregnation device (2) further comprises a first squeezing roller (22) and a second squeezing roller (24). The first slurry squeezing roller (22) is arranged above the sizing tank (21) and the impregnation tank (23), and is formed by two parallel rollers arranged in pairs, with a gap between the two parallel rollers. The gap between the two rollers of the first squeezing roller (22) is used to pass the sized carbon fiber filaments so as to squeeze out the excess slurry on the sized carbon fiber filaments; The second squeezing roller (24) is arranged above the output end of the impregnation tank (23) and is formed by two parallel rollers arranged in pairs with a gap between the two parallel rollers. The gap between the two rollers of the second squeezing roller (24) is used to pass the carbon fiber filaments pre-finished product coated with a stable polyetheretherketone resin slurry, so as to squeeze out the excess slurry on the carbon fiber filaments pre-finished product coated with a stable polyetheretherketone resin slurry.

3. The carbon fiber sizing and impregnation equipment according to claim 2, characterized in that: The feeding device (1) further comprises a limiting roller array (12) and a first drying oven (13). The unwinder (11), the limiting roller array (12) and the first oven (13) are arranged in sequence from front to back according to the production sequence. The limiting roller array (12) includes four vertical rollers, which are used to limit the running track of the carbon fiber filament raw material; The first oven (13) is provided with a wire inlet and a wire outlet at both ends thereof, and a heating resistance wire is provided therein for removing the original resin on the surface of the carbon fiber raw material passing therethrough, thereby obtaining carbon fiber filaments with the original resin removed.

4. The carbon fiber sizing and impregnation equipment according to claim 3, characterized in that: The delivery device (3) further comprises a second oven (33) and a wire arrangement device (32). The second oven (33), the cable arrangement device (32), and the reel (31) are arranged in sequence from front to back according to the production sequence. The second oven (33) is provided with a wire inlet and a wire outlet at both ends thereof, and a heating resistance wire is provided therein for drying the excess water on the surface of the carbon fiber filaments preliminary product coated with the stable polyetheretherketone resin slurry passing therethrough, so as to obtain a dry carbon fiber filaments preliminary product; The cable arrangement device (32) is equipped with a motor and is capable of moving forward and backward, and is used to evenly arrange the dry carbon fiber filaments to obtain evenly arranged dry carbon fiber filaments. The roller of the winder (31) is equipped with a motor for collecting the evenly arranged dry carbon fiber filaments to obtain the final product of carbon fiber filaments impregnated with polyetheretherketone resin.

5. The carbon fiber sizing and impregnation equipment according to claim 4, characterized in that: It also includes a box body (100), wherein a vertical plate (101) is provided on the side of the box body (100). The sizing tank (21) and the dipping tank (23) are arranged side by side at the lower left corner of the vertical plate (101). The unwinder (11), the limiting roller array (12), and the first oven (13) are arranged in sequence from right to left on the upper part of the vertical plate (101). The second oven (33), the cable arrangement device (32), and the reel (31) are arranged in sequence from right to left at the lower part of the vertical plate (101).

6. The carbon fiber sizing and impregnation equipment according to claim 5, characterized in that: It also includes a guide roller assembly (4), wherein the guide roller assembly (4) includes a first guide roller (41) and a second guide roller (42). The first guide roller (41) is arranged between the unwinder (11) and the limiting roller array (12), and is used to transport the carbon fiber filament raw material pre-stored in the unwinder (11) to the limiting roller array (12); The second guide roller (42) is arranged between the second oven (33) and the wire arrangement device (32), and is used to transport the dry carbon fiber filaments from the wire outlet of the second oven (33) to the wire arrangement device (32).

7. The carbon fiber sizing and impregnation equipment according to claim 6, characterized in that: The guide roller assembly (4) further comprises a third guide roller (51), a fourth guide roller (52), a fifth guide roller (53), a sixth guide roller (54) and a seventh guide roller (55). The third guide roller (51), the fourth guide roller (52), and the fifth guide roller (53) are arranged in sequence from right to left on the extension line of the silk outlet of the first oven (13). The fifth guide roller (53), the sixth guide roller (54) and the seventh guide roller (55) are arranged above the sizing trough (21) in order from top to bottom, and the seventh guide roller (55) is located directly above the sizing trough (21).

8. The carbon fiber sizing and impregnation equipment according to claim 7, characterized in that: The guide roller assembly (4) further comprises an electric guide roller (50), wherein the electric guide roller (50) is arranged in a region enclosed by a line connecting the third guide roller (51) and the fifth guide roller (53) and a line connecting the fifth guide roller (53) and the seventh guide roller (55). The electric push rod (50) is provided on the electric push guide (50), and the electric push rod (501) is provided with a motor and can move up and down, and is used to unfold the carbon fiber filaments from which the original resin has been removed; The guide roller assembly (4) further comprises an eighth guide roller (56), wherein the eighth guide roller (56) is arranged between the second squeezing roller (24) and the wire inlet of the second oven (33).

9. The carbon fiber sizing and impregnation equipment according to claim 8, characterized in that: Also included is a console (6), A controller is disposed inside the console (6), and a display screen (60) is disposed outside the console (6). The roller of the unwinder (11) is equipped with a motor, and the motor of the unwinder (11), the motor of the electric push rod (501), the motor of the cable arrangement device (32), the motor of the rewinder (31), the heating resistance wire of the first oven (13), the heating resistance wire of the second oven (33), and the display screen (60) are respectively connected to the controller via wires.

10. A method for sizing and impregnating carbon fiber yarns, using the carbon fiber sizing and impregnating equipment according to claim 9, characterized in that: The method includes The carbon fiber filament raw material pre-stored in the unwinder (11) is introduced into the sizing tank (21) through a guide roller, and the carbon fiber filaments are sized by a mixed solution using dichloromethane as a solvent and polyetheretherketone as a solute in the sizing tank (21), thereby obtaining sized carbon fiber filaments; When the sized carbon fiber filaments pass through the impregnation tank (23), the suspension of polyetheretherketone resin pre-stored in the impregnation tank (23) impregnates the sized carbon fiber filaments, so that the polyetheretherketone resin and the dichloromethane solution of polyetheretherketone undergo a chemical reaction, thereby obtaining a carbon fiber filament pre-finished product coated with a stable polyetheretherketone resin slurry; The carbon fiber filaments pre-finished product coated with the stable polyetheretherketone resin slurry are finally collected by the winder (31).

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