Full-automatic impregnated yarn sample preparation equipment and sample preparation method

Abstract

The invention discloses full-automatic impregnated yarn sample preparation equipment and a sample preparation method.The full-automatic impregnated yarn sample preparation equipment comprises a central control system, an automatic yarn winding unit, an impregnation and glue suction unit and a curing unit, and the automatic yarn winding unit comprises a yarn roll driving device, a creel driving device, a yarn guiding device and a fixing device; the yarn roll driving device comprises a first servo motor, an air expansion shaft and a tension sensor, the air expansion shaft is connected with an output shaft of the first servo motor, the tension sensor is arranged at the joint of the air expansion shaft and the output shaft of the first servo motor and is in signal connection with the central control system, and the creel driving device comprises a second servo motor and a chuck. The chuck is installed on an output shaft of the second servo motor, the yarn guiding device is arranged between the yarn roll driving device and the creel driving device, and the fixing device is arranged between the yarn roll driving device and the creel driving device. All yarn guide roller mechanisms generating sliding friction with the yarn are abandoned, and surface damage and strength attenuation caused by friction in the yarn winding process are avoided.

Description

Technical Field

[0001] This invention relates to a fully automated equipment and method for preparing impregnated yarn samples, belonging to the field of prepreg technology. Background Technology

[0002] Resin-impregnated yarn specimens, especially those based on carbon fiber or glass fiber, are key standard specimens for evaluating the interfacial bonding performance between fibers and resin matrices. Their preparation quality directly determines the accuracy of subsequent test data (such as interlaminar shear strength (ILSS), and is of paramount importance for the research and development, quality control, and performance evaluation of composite materials.

[0003] Currently, the preparation of sizing yarn samples, both domestically and internationally, mainly relies on manual operation and semi-automatic equipment. This presents two major technical bottlenecks that are difficult to overcome, severely impacting the accuracy and reliability of the test results: 1. Fiber damage problems caused by traditional tension control methods: During the winding process, a constant and precise tension must be applied to the fibers to ensure uniform fiber straightness and volume fraction within the sample. Existing semi-automatic or manual equipment typically employs complex mechanical roller systems (such as guide rollers, tension arms, and brake discs) to generate and control the tension. The fibers need to pass over multiple surfaces of these rollers during the winding path, resulting in significant frictional contact. This friction can cause scratches, fuzzing, and even breakage on the surface of high-performance fibers (especially brittle carbon fibers). This physical damage is latent and difficult to detect during preparation, but it significantly weakens the fiber's bulk strength and its interfacial bonding with the resin, leading to a systematically lower measured mechanical property that fails to accurately reflect the material's inherent properties. Those skilled in the art are well aware of this problem, but due to the lack of effective non-contact or low-friction tension control solutions, they have long had to accept this systematic error introduced by the sample preparation process itself.

[0004] 2. Issues with parameter standardization and consistency caused by manual operation: Even if fiber damage is avoided, the high degree of reliance on manual operation in the preparation process introduces huge uncertainties. The entire process covers dozens of key operation nodes, such as winding tension control, resin component weighing and mixing, impregnation time control, adhesive suction force and number of times, and curing process control. These nodes heavily depend on the operator's skill and sense of responsibility. For example, winding tension is adjusted by feel, and there are huge differences between different people and at different times. The resin ratio relies on manual weighing, and even a small error can significantly affect the intrinsic properties of the cured resin. Impregnation time and adhesive suction operation (such as directly using newspaper to perform adhesive suction operation, the force and number of times of wiping) cannot be quantified and are entirely based on experience.

[0005] These factors result in significant variability in test data between different operators, and even between samples prepared by the same operator in different batches. This leads to large fluctuations in test data, poor repeatability and reproducibility, rendering inter-laboratory data comparisons meaningless and severely hindering the fair evaluation of materials and the effective exchange of technology.

[0006] Therefore, existing technologies present a contradiction between the demand for high-standard, highly consistent samples and outdated, variable, and destructive preparation methods. There is an urgent market need for a fully automated sample preparation device and method that can fundamentally avoid fiber mechanical damage and digitize and standardize all key process parameters. This would free up manpower, eliminate human error, and ensure that every sample preparation produces the highest quality, most repeatable standard samples, providing a solid guarantee for the high-precision testing and evaluation of composite materials. Summary of the Invention

[0007] One objective of this invention is to provide a fully automatic sizing yarn sample preparation device, which solves the technical defect in the prior art where the use of yarn guide rollers causes frictional damage to the yarn, making it difficult to effectively improve the quality of sizing yarn samples.

[0008] To solve the above problems, the technical solution adopted by the present invention is: a fully automatic impregnated yarn sample preparation device, comprising a central control system, an automatic yarn winding unit, an impregnation and suction unit, and a curing unit. The automatic yarn winding unit is used to wind the yarn onto a yarn frame. The impregnation and suction unit is used to impregnate the yarn. The curing unit is used to dry the impregnated yarn. The automatic yarn winding unit includes a yarn roll driving device, a yarn frame driving device, a yarn feeding device, and a fixing device. The yarn roll driving device includes a servo motor, an air shaft, and a tension sensor. The air shaft is connected to the output shaft of the servo motor and is used to fix and drive the yarn roll to rotate by the servo motor. The tension sensor is located on the air shaft. The connection point with the output shaft of servo motor one is connected to the signal of the central control system. The tension sensor detects the tension of the yarn and controls the output torque of servo motor one. The yarn frame drive device includes servo motor two and a chuck. The chuck is mounted on the output shaft of servo motor two and is used to clamp the yarn frame. Servo motor two drives the chuck and the yarn frame clamped by the chuck to rotate. The yarn feeding device is set between the yarn roll drive device and the yarn frame drive device and is used to pull the yarn from the yarn roll to the yarn frame and initially position it. The fixing device is set between the yarn roll drive device and the yarn frame drive device and is used to attach the beginning of the yarn to the yarn frame and attach the end of the yarn to the yarn frame after the yarn is wound, and to cut the yarn.

[0009] As a further improvement of the present invention, the automatic yarn winding unit also includes a yarn feeding device, which includes a guide rail and a movable frame. There are two or more guide rails and they are parallel to the center line of the chuck. The movable frame is set on the guide rail and forms a horizontal moving pair with the guide rail. The movable frame is driven by a servo motor to move on the guide rail. The yarn frame driving device is set on the movable frame and moves synchronously with the movement of the movable frame. When the yarn frame rotates one revolution, the distance that the movable frame moves driven by the servo motor is equal to the pitch of the yarn wound on the yarn frame.

[0010] As a further improvement of the present invention, it also includes a yarn roll storage platform, a yarn roll gripping robot, a yarn frame storage platform, and a yarn frame gripping robot. The yarn roll storage platform is located near the yarn roll driving device for placing yarn rolls. The yarn roll gripping robot is used to grip the yarn rolls from the yarn roll storage platform and place the yarn rolls onto the air shaft. The yarn frame storage platform is located near the yarn frame driving device for placing yarn frames. The yarn frame gripping robot is used to grip the yarn frames from the yarn frame storage platform and place the yarn frames on a chuck, where the chuck clamps the yarn frames.

[0011] As a further improvement of the present invention, it also includes an impregnation robot for picking up a yarn frame with yarn wound on it from a chuck, moving the yarn frame to the impregnation and suction unit to impregnate the yarn, and performing suction treatment on the yarn in conjunction with the impregnation and suction unit after impregnation. The impregnation robot is connected to the central control system, and the impregnation time of the yarn is controlled by the central control system.

[0012] As a further improvement of the present invention, the impregnation and absorption unit includes a resin tank, a gantry frame, an unwinding roller, and a winding roller. The resin tank is filled with resin. The gantry frame is set on a fixed object and is driven to move horizontally by a drive device. The two ends of the unwinding roller are rotatably connected to the gantry frame and are provided with absorbent paper. The two ends of the winding roller are rotatably connected to the gantry frame and are driven to rotate by a winding motor to wind up the absorbent paper. The impregnated yarn frame is supported and suspended above the resin tank by an impregnation robot. The gantry frame moves to the point where the absorbent paper adheres to the yarn frame. The winding motor drives the winding roller to wind up the absorbent paper and absorb excess resin on the yarn frame.

[0013] As a further improvement of the present invention, a resin preparation and delivery unit is also included, comprising a resin storage tank, a metering pump, a stirring cup, a lifting and stirring mechanism, and a tilting mechanism. Three resin storage tanks are used to store the resin main agent, curing agent, and diluent, respectively. Three metering pumps are used, with one pump connected to each resin storage tank. The stirring cup receives the resin main agent, curing agent, and diluent pumped from the resin storage tank by the metering pump. The lifting and stirring mechanism extends into the stirring cup to stir the resin main agent, curing agent, and diluent, ensuring they are evenly mixed. The tilting mechanism tilts the stirring cup towards the resin tank after the resin main agent, curing agent, and diluent are evenly mixed, pouring the resin from the stirring cup into the resin tank.

[0014] As a further improvement of the present invention, the resin storage tank is equipped with a liquid level sensor and a heating and insulation jacket, which are used to observe the liquid level in the resin storage tank and maintain the stability of the resin viscosity, respectively.

[0015] As a further improvement of the present invention, the curing unit includes an oven and a curing robot. The oven door faces the side of the impregnation and suction unit. The control system of the oven is connected to the central control system. The central control system controls the heating and curing time and temperature of the oven. The curing robot is located between the curing unit and the impregnation and suction unit and is used to pick up the yarn frame after suction and place it in the oven.

[0016] As a further improvement of the present invention, a post-processing unit is also included, which includes a cutting robot, a collection basket, and a label printing and pasting robot. The cutting robot is equipped with a yarn cutting blade or scissors at its end. The curing robot takes the yarn rack out of the oven, and the cutting robot cuts the two ends of the yarn from the yarn rack. The collection basket is located below the cutting robot and is used to collect the yarn that falls from the yarn rack. The label printing and pasting robot is used to print a QR code containing yarn information and paste the QR code on the collection basket.

[0017] Another object of the present invention is to provide a fully automated method for preparing impregnated yarn samples, comprising the following steps: Step 1, parameter setting: Set the parameters for sample preparation of the impregnated yarn through the central control system; Step 2: The yarn is wound by the yarn roll drive device. First, the yarn roll is placed on the air shaft, and the yarn frame is clamped on the chuck. Then, the yarn guide device pulls the yarn from the yarn roll to the yarn frame. The fixing device attaches the beginning of the yarn to the yarn frame. The servo motor drives the chuck to rotate and wind the yarn on the yarn roll onto the yarn frame. After the yarn is wound, the fixing device attaches the end of the yarn to the yarn frame and cuts the yarn. Step 3: The impregnation robot grabs the yarn frame from the chuck, impregnates the yarn frame in the resin tank containing resin, and then lifts the yarn frame out of the impregnation tank and suspends it above the impregnation tank. The gantry moves toward the yarn frame and the take-up shaft takes up the absorbent paper on the unwinding roller. The absorbent paper absorbs the excess resin on the yarn frame. Step 4: The curing robot grabs the yarn frame from the impregnation robot and puts it into the oven for heating to cure the resin. Then the curing robot takes the yarn frame out of the oven. Step 5: The cutting robot cuts the yarn from the yarn rack and drops it into the collection box. The label printing and pasting robot prints a QR code containing the yarn information and pastes it on the collection box.

[0018] In summary, the beneficial effects of this invention are: 1. This invention eliminates fiber damage: This invention eliminates all guide roller mechanisms that slide and rub against the yarn, and adopts a non-contact active tension control strategy to avoid surface damage and strength reduction of carbon fiber or glass fiber caused by friction during winding from the source.

[0019] 2. This invention realizes the digitalization of all process parameters: all key process parameters such as winding, glue mixing, impregnation, glue absorption, and curing are integrated into the central control system, realizing parameter preset, storage, precise execution and traceability, and completely solving the random errors and dispersion caused by manual operation.

[0020] 3. This invention achieves full-process automation: It integrates multiple robotic arms and dedicated functional modules to realize unmanned operation from "yarn roll - empty yarn rack" to "marking - finished product sample", which greatly improves efficiency and reduces labor intensity and human operation risks. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] The components include: 1. Servo motor; 2. Liquid level sensor; 3. Resin storage tank; 4. Yarn rack storage platform; 5. Lifting mixer; 6. Guide rail; 7. Chuck; 8. Servo motor II; 9. Tape roll; 10. Cutting shears; 11. Central control system; 12. Tension sensor; 13. Yarn feeding robot; 14. Yarn roll; 15. Yarn roll gripping robot; 16. Yarn roll storage platform; 17. Yarn rack; 18. Impregnation robot; 19. Control system; 20. Yarn rack isolation frame; 21. Yarn rack after glue absorption; 22. Oven door; 23. Curing robot; 24. Oven; 25. Gantry frame; 26. Glue absorption paper; 27. Resin tank; 28. Mixing cup; 29. ​​Side tilting mechanism; 30. Metering pump; 31. Servo motor I; 32. Air shaft; 33. Moving frame. Detailed Implementation

[0023] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Example 1

[0024] like Figure 1The fully automated impregnated yarn sample preparation equipment shown includes a central control system 11, an automatic yarn winding unit, an impregnation and suction unit, and a curing unit. The automatic yarn winding unit winds the yarn onto a yarn frame, the impregnation and suction unit impregnates the yarn, and the curing unit dries the impregnated yarn. In this embodiment, the central control system 11 includes an industrial computer (IPC) and a programmable logic controller (PLC). The IPC provides a human-machine interface for engineers to input, modify, and store all process parameters and formulas (such as the number of winding turns, tension setpoint, resin ratio, impregnation time, suction pressure, curing temperature curve, etc.), as well as monitor the overall operating status and data records of the equipment. The PLC receives instructions from the IPC, directly drives all actuators, and processes feedback signals in real time. This embodiment features a rigid, high-strength aluminum alloy frame with a worktable mounted on it; the term "fixed object" as used below refers to this worktable.

[0025] like Figure 1 As shown, the automatic yarn winding unit includes a yarn roll drive device, a yarn frame drive device, a yarn feeding device, and a fixing device. The yarn roll drive device includes a servo motor 31, an air shaft 32, and a tension sensor 12. The air shaft 32 is connected to the output shaft of the servo motor 31 and is used to fix and drive the yarn roll 14 to rotate by the servo motor 31. The tension sensor 12 is located at the connection between the air shaft 32 and the output shaft of the servo motor 31 and is connected to the central control system 11. The tension sensor 12 detects the tension of the yarn and is used to control the output torque of the servo motor 31 according to the yarn tension. The control mode of the servo motor 31 is torque mode, and its function is as an actuator for tension control.

[0026] like Figure 1 As shown, the yarn frame drive device in this embodiment includes a servo motor 8 and a chuck 7. The chuck 7 is a three-jaw chuck, which is mounted on the output shaft of the servo motor 8. It is used to clamp the yarn frame 17 and the servo motor 8 drives the chuck 7 and the yarn frame 17 clamped by the chuck 7 to rotate. The rotation of the yarn frame 17 can wind the yarn onto the yarn frame 17. In this embodiment, the yarn frame 17 has an I-shaped structure, and the smaller diameter part in the middle is used to wind the yarn.

[0027] like Figure 1 As shown, in this embodiment, the yarn guiding device is located between the yarn roll driving device and the yarn frame driving device. It is used to guide the yarn from the yarn roll to the yarn frame and initially position it. The yarn guiding device is a yarn guiding robot 13. The yarn guiding robot 13 grabs the beginning of the yarn roll 14 from the air shaft 32 and pulls the yarn towards the yarn frame 17. While the yarn guiding robot 13 is pulling the yarn towards the yarn frame 17, the yarn roll 14 on the air shaft 32 rotates synchronously to unwind the yarn.

[0028] like Figure 1 As shown, the fixing device in this embodiment is located between the yarn roll driving device and the yarn frame driving device. It is used to attach the beginning of the yarn to the yarn frame and, after the yarn is wound, to attach the end of the yarn to the yarn frame, and to cut the yarn. The fixing device in this embodiment includes two fixing robots. One fixing robot has a tape roll 9 at its end, and the other fixing robot has a cutting scissors 10 at its end. The yarn guiding robot 13 pulls the beginning of the yarn to the yarn frame 17 and fixes the beginning of the yarn to the yarn frame. When the yarn is wound around the yarn frame 17 at one end with a larger diameter, a fixed robotic arm with a tape roll 9 at the end uses tape to attach the beginning of the yarn to the yarn frame 17. After the yarn is wound around the yarn frame 17, the fixed robotic arm with a tape roll 9 at the end uses tape to attach the end of the yarn to the other end of the yarn frame 17 with a larger diameter. Then, a cutting scissors 10 at the end cuts the yarn. In this embodiment, the end of the yarn refers to the point on the yarn frame 17 where the yarn is secondly attached and fixed with tape.

[0029] like Figure 1 As shown, in order to control the pitch of the yarn wound on the yarn frame 17, the automatic yarn winding unit in this embodiment is equipped with a yarn feeding device. The yarn feeding device includes a guide rail 6 and a moving frame 33. There are two guide rails 6, and the two guide rails 6 are parallel. The guide rails 6 are parallel to the center line of the chuck 7. The moving frame 33 is set on the guide rails 6 and forms a horizontal moving pair with the guide rails. In this embodiment, a slider (not shown in the figure) can be set at the bottom of the moving frame 33. Through the sliding cooperation between the slider and the guide rail 6, the moving frame 33 can slide along the direction of the guide rail 6. The moving frame 33 is driven by a servo motor (not shown in the figure) to move on the guide rail 6. A lead screw (not shown in the figure) is connected to the output shaft of the servo motor 3. The lead screw passes through the movable frame 33 and is threadedly engaged with the movable frame 33. The lead screw is located between two guide rails 6 and is parallel to the guide rails 6. The yarn frame drive device is set on the movable frame 33 and moves synchronously with the movement of the movable frame 33. In this embodiment, when the yarn frame 17 rotates one revolution, the distance that the servo motor 33 drives to move is equal to the pitch (e.g., 10mm) of the yarn wound on the yarn frame 17. In this embodiment, the servo motor 3 is signal-connected to the central control system 11, and the central control system 11 controls the moving speed of the servo motor 33 driven by the movable frame 33 according to a preset value.

[0030] like Figure 1As shown, this embodiment includes a yarn roll storage platform 16, a yarn roll gripping robot 15, a yarn rack storage platform 4, and a yarn rack gripping robot (not shown in the figure). The yarn roll storage platform 16 is located near the yarn roll drive device and is used to place yarn rolls. The yarn roll gripping robot 15 is located between the yarn roll drive device and the yarn roll storage platform 16 and is used to grip the yarn roll 14 from the yarn roll storage platform 16 and place the yarn roll 14 onto the air shaft 32. The yarn rack storage platform 4 is located near the yarn rack drive device and is used to place yarn racks. The yarn rack gripping robot is located between the yarn rack drive device and the yarn rack storage platform 4 and is used to grip the yarn rack 17 from the yarn rack storage platform 4 and place the yarn rack 17 onto the chuck 7, where the chuck 7 clamps the yarn rack 17. In this embodiment, the yarn roll storage platform 16 is a multi-layer shelf structure.

[0031] In this embodiment, the tension sensor 12 is the key to solving friction damage. The programmable logic controller (PLC) of the central control system 11 receives the feedback signal from the tension sensor 12 and compares it with the preset tension value. It dynamically adjusts the output torque of the control servo motor 31 in torque mode to generate an adjustable torque that is the same as or opposite to the yarn winding and traction direction. This achieves active, continuous and adjustable tension control of the yarn. No sliding friction between the yarn and any guide roller is required throughout the process, thus avoiding the friction damage problem caused to the yarn by the use of guide rollers in the prior art.

[0032] like Figure 1 As shown, this embodiment is provided with an impregnation robot 18, which is used to pick up the yarn frame 17 with yarn wound on the chuck 7, move the yarn frame 17 to the impregnation and suction unit to impregnate the yarn, and after the impregnation is completed, cooperate with the impregnation and suction unit to perform suction treatment on the yarn. The impregnation robot 18 is connected to the central control system 11 by signal, and the central control system 11 controls the impregnation time of the yarn.

[0033] like Figure 1As shown, the impregnation and absorption unit in this embodiment includes a resin tank 27, a gantry frame 25, an unwinding roller, and a winding roller. The resin tank 27 contains resin. The gantry frame 25 is mounted on a fixed object and is driven to move horizontally by a drive device (not shown in the figure). The two ends of the unwinding roller are rotatably connected to the gantry frame 25 by bearings. A roll of absorbent paper 26 is mounted on the unwinding roller. The two ends of the winding roller are rotatably connected to the gantry frame 25 by bearings and are driven to rotate by a winding motor (not shown in the figure) to wind up the absorbent paper 26. The impregnated yarn frame 17 is supported and suspended above the resin tank 27 by an impregnation robot 18. The gantry frame 25 moves to the point where the absorbent paper 26 adheres to the yarn frame. The winding motor drives the winding roller to wind up the absorbent paper 26 to absorb excess resin on the yarn frame 17. In this embodiment, the unwinding roller is located below the take-up roller, and a pressure roller is provided between the take-up roller and the unwinding roller. The two ends of the pressure roller are connected to the gantry 25. The pressure roller is provided with a semi-circular groove, which can cooperate with the part of the yarn frame 17 where the yarn is wound, so that the adhesive-absorbing paper 26 can cover half of the yarn frame 17. At the same time, the adhesive-absorbing paper 26 is attached to the yarn surface with a preset pressure. The take-up roller rotates at a uniform speed, pulling the dirty adhesive-absorbing paper 26 after adhesive absorption and rolling it away, so as to achieve continuous, uniform and quantitative adhesive absorption. After adhesive absorption is completed on one side of the yarn frame 17, the dip-impregnation robot 18 drives the yarn frame 17 to rotate 180°, and the take-up roller rolls up the adhesive-absorbing paper 26 to perform the same adhesive absorption treatment on the other side of the yarn frame 17. In this embodiment, a pressure sensor can be installed on the pressure roller to detect the pressure at which the adhesive-absorbing paper 26 is attached to the yarn surface. This pressure sensor is connected to the central control system 11, and the drive device for moving the gantry 25 is also connected to the central control system 11. The pressure detected by the pressure sensor is fed back to the central control system 11, which then controls the drive device to move the gantry 25, adjusting the pressure of the adhesive-absorbing paper 26 on the yarn surface to a preset pressure. In this embodiment, the drive device can be a motor with a lead screw threaded into the gantry 25, or it can be a cylinder or an electric cylinder, etc. In this embodiment, a weighing sensor is installed below the resin tank 27 to measure the weight of the resin tank 27 and the resin inside, ensuring that the amount of resin injected into the resin tank 27 is sufficient to submerge the yarn frame 17.

[0034] like Figure 1As shown, this embodiment includes a resin preparation and delivery unit for resin preparation. This unit comprises a resin storage tank 3, a metering pump 30, a stirring cup 28, a lifting and stirring mechanism 5, and a tilting mechanism 29. The resin storage tank 3 is a stainless steel pressure tank, and there are three of them. The three resin storage tanks 3 are used to store the resin main agent, curing agent, and diluent, respectively. There are three metering pumps 30, with one metering pump 30 connected to each resin storage tank 3. The stirring cup 28 is a disposable plastic cup used to receive the resin main agent, curing agent, and diluent pumped by the metering pump 30 from the resin storage tank 3. The curing agent and diluent are mixed uniformly by a lifting mixer 5 that extends into the mixing cup 28. The lifting mixer 5 is used to stir the resin main agent, curing agent, and diluent in the mixing cup 28 until they are evenly mixed. The tilting mechanism 29 is used to tilt the mixing cup 28 towards the resin tank after the resin main agent, curing agent, and diluent are evenly mixed, pouring the resin from the mixing cup 28 into the resin tank 27. In this embodiment, the tilting mechanism 29 can be a tilting robot that grabs the mixing cup 28 and pours the resin into the resin tank 27. The resin storage tank in this embodiment is equipped with a liquid level sensor 2 and a heating insulation sleeve (not shown in the figure). The liquid level sensor 2 is used to observe the liquid level in the resin storage tank 3, and the heating insulation sleeve is used to keep the resin storage tank 3 warm to maintain stable resin viscosity. In this embodiment, the metering pump 30 is a gear pump or a plunger pump, such as... Figure 1 As shown, the metering pump 30 in this embodiment uses a gear pump, each gear pump is driven by an independent servo motor 1, the servo motor 1 is connected to the central control system 11 by a signal, and the speed of the gear pump is precisely controlled by the central control system 11, thereby precisely controlling the amount and ratio of resin main agent, curing agent and diluent added. The lifting and stirring mechanism 5 in this embodiment includes a lifting frame set on a fixed object, a stirring motor set on the lifting frame and capable of vertically moving on the lifting frame, and a stirring paddle set on the stirring motor. The stirring motor and the stirring paddle move downward so that the stirring paddle extends into the stirring cup 28. The stirring motor drives the stirring paddle to rotate, which is used to mix and stir the resin main agent, curing agent and diluent in the stirring cup 28.

[0035] like Figure 1As shown, the curing unit in this embodiment includes an oven 24 and a curing robot 23. The oven door 22 of the oven 24 faces the side of the impregnation and suction unit. The control system 19 of the oven is connected to the central control system 11, which controls the heating and curing time and temperature of the oven 24. The curing robot 23 is positioned between the oven 24 and the impregnation and suction unit, and is used to pick up the yarn frame 21 after suction from the impregnation robot 18 and place it inside the oven 24. In this embodiment, a yarn frame isolation rack 20 is provided inside the oven 24 to separate multiple yarn frames 21 after suction when they are placed inside the oven 24, so as to facilitate the curing of the resin on the yarn. In this embodiment, the oven door 22 is automatically opened or closed by a cylinder.

[0036] This embodiment includes a post-processing unit for processing the cured yarn. The post-processing unit includes a cutting robot (not shown in the figure), a collection basket (not shown in the figure), and a label printing and pasting robot (not shown in the figure). The cutting robot is equipped with a yarn wheel cutting blade or scissors (not shown in the figure) at its end. The curing robot takes the yarn frame out of the oven 24, and the cutting robot cuts both ends of the yarn from the tape pasted on the yarn frame. The collection basket is located below the cutting robot and is used to collect the yarn that is cut from the yarn frame and falls downward. The label printing and pasting robot is used to print a QR code containing yarn information (such as sample batch, material, date, etc.) and paste the QR code on the collection basket. Example 2

[0037] This embodiment describes a fully automated method for preparing impregnated yarn samples, using the fully automated impregnated yarn sample preparation equipment from Embodiment 1, and includes the following steps: Step 1, parameter setting: The parameters for preparing the impregnated yarn sample are set through the central control system 11. The sample preparation parameters include the number of yarn wrapping turns, tension setting value, impregnation time, adhesive absorption pressure, curing temperature curve, and the ratio of resin main agent, curing agent and diluent.

[0038] Step 2 involves the yarn winding process performed by the yarn roll drive device. Specifically, the yarn roll gripping robot 15 first picks up the yarn roll 14 from the yarn roll storage platform 16 and places it onto the air shaft 32. Then, the yarn roll gripping robot picks up the yarn frame 17 from the yarn frame storage platform 4 and clamps it onto the chuck 7. Next, the yarn guiding device (i.e., the yarn guiding robot 13) pulls the yarn from the yarn roll 14 to the yarn frame 17. Finally, a fixing robot with a tape roll 9 at its end attaches the beginning of the yarn to the yarn frame 17 using tape. The process is then controlled by a servo motor. Machine 2 8 drives chuck 7 to rotate and wind the yarn on yarn roll 14 onto yarn frame 17. After the yarn is wound, a fixed robot arm with tape roll 9 at the end attaches the end of the yarn to the yarn frame with tape. Then, a fixed robot arm with cutting blade 10 at the end cuts the yarn connecting yarn frame 17 and yarn roll 14. During this process, servo motor 2 8 drives yarn frame 17 to wind the yarn at a constant speed. While the yarn is wound on yarn frame 17, servo motor 3 drives moving frame 33 to move on guide rail 6.

[0039] Step 3: The impregnation robot 18 picks up the yarn frame 17 from the chuck 7 and impregnates the yarn frame 17 in the resin tank 27 containing resin. The impregnation time is controlled by the central control system according to the preset value. Then, the impregnation robot 18 lifts the yarn frame 17 out of the impregnation tank and suspends it above the impregnation tank 27 for resin degreasing. The gantry 25 moves toward the yarn frame 17 and the take-up shaft takes up the absorbent paper 26 on the unwinding roller. The absorbent paper 26 absorbs the excess resin on the yarn frame 17.

[0040] Before immersing the yarn frame 17 in the resin tank 27, three metering pumps 30 pump resin main agent, curing agent and diluent from three resin storage tanks 3 in a ratio of 100:30:5 into the mixing cup 28. Then, the lifting and stirring mechanism 5 descends into the mixing cup 28 to fully stir the resin main agent, curing agent and diluent in the mixing cup 28, so that the resin main agent, curing agent and diluent are mixed evenly to complete the preparation of the resin. After stirring, the lifting and stirring mechanism 5 moves upward to remove it from the mixing cup 28, and then the side-tilting mechanism 29 drives the mixing cup 28 to tilt towards the resin tank 27 to pour the prepared resin into the resin tank 27.

[0041] Step 4: The curing robot 23 picks up the yarn frame 17 from the impregnation robot 18 and places it into the oven 24 for heating to cure the resin on the yarn. Then, the curing robot 23 removes the yarn frame from the oven 24. The temperature and heating time inside the oven 24 are controlled by the central control system 11. In this embodiment, the yarn frame 17 is placed on the yarn frame isolation rack 20. Three yarn frames 17 can be placed in the oven 24 and then the oven door 22 is closed. The heating and curing process involves first heating and curing at 80°C for two hours, and then reheating and curing at 120°C for two hours.

[0042] Step 5: The cutting robot cuts the yarn from the yarn rack and drops it into the collection box. The cut is made near the tape used to attach and fix the yarn. Then, the label printing and pasting robot prints a QR code containing the yarn information and pastes the QR code on the collection box.

[0043] Compared with existing technologies, the present invention has the following technical advantages: 1. Zero friction damage, more accurate data: This invention adopts non-contact active tension control technology, which eliminates the need for a circular straight yarn guide roller, completely avoiding friction damage to the fiber by the yarn guide roller. The prepared sample can accurately reflect the interfacial performance between the fiber and the resin, solving the problem of systematically low test results.

[0044] 2. Extremely high repeatability and consistency: The entire process is digitally controlled, with all key parameters fixed in the program, completely eliminating human error and ensuring a high degree of consistency between samples within the same batch and between different batches, greatly improving the reliability and authority of test data.

[0045] 3. High throughput and high efficiency: Fully automated production line operation can achieve 24-hour unmanned continuous production, which is particularly suitable for R&D and quality control scenarios that require a large number of parallel tests, and its efficiency far exceeds that of manual operation.

[0046] 4. Intelligent and traceable: All process parameters are stored in data form, enabling complete traceability of the production process and providing a solid data foundation for product quality analysis and process optimization.

[0047] 5. Safety and environmental protection: It avoids direct contact between operators and chemical resins and fiber dust, improves the working environment, and reduces health risks.

[0048] Unless otherwise specified in the above description, all parts are prior art, or can be implemented using existing technology. Furthermore, the specific embodiments described in this invention are merely preferred embodiments and are not intended to limit the scope of this invention. That is, all equivalent changes and modifications made within the scope of this invention should be considered within the technical scope of this invention.

Claims

1. A fully automatic sample preparation device for impregnated yarn, characterized in that, It includes a central control system, an automatic yarn winding unit, a glue impregnation and glue absorption unit, and a curing unit. The automatic yarn winding unit is used to wind the yarn onto the yarn frame, the glue impregnation and glue absorption unit is used to impregnate the yarn, and the curing unit is used to dry the impregnated yarn. Automatic yarn winding unit includes The yarn roll drive device includes a servo motor, an air shaft, and a tension sensor. The air shaft is connected to the output shaft of the servo motor and is used to fix and drive the yarn roll to rotate by the servo motor. The tension sensor is set at the connection between the air shaft and the output shaft of the servo motor and is connected to the signal of the central control system. The tension sensor detects the tension of the yarn and is used to control the output torque of the servo motor. A yarn frame drive device includes a servo motor 2 and a chuck. The chuck is mounted on the output shaft of the servo motor 2 and is used to clamp the yarn frame. The servo motor 2 drives the chuck and the yarn frame clamped by the chuck to rotate. The yarn feeding device is located between the yarn roll drive device and the yarn frame drive device, and is used to draw the yarn from the yarn roll to the yarn frame and initially position it. A fixing device is installed between the yarn roll drive device and the yarn frame drive device. It is used to attach the beginning of the yarn to the yarn frame and to attach the end of the yarn to the yarn frame after the yarn is wound, and to cut the yarn.

2. The fully automatic impregnated yarn sample preparation equipment according to claim 1, characterized in that, The automatic yarn winding unit also includes a yarn feeding device, which includes The guide rails consist of two or more rails and are parallel to the center line of the chuck. The movable frame is mounted on the guide rail and forms a horizontal sliding pair with the guide rail. The movable frame is driven by a servo motor to move on the guide rail. The yarn frame drive device is mounted on the movable frame and moves synchronously with the movable frame. When the yarn frame rotates one revolution, the distance that the movable frame moves driven by the servo motor is equal to the pitch of the yarn wound on the yarn frame.

3. The fully automatic impregnated yarn sample preparation equipment according to claim 1, characterized in that, Also includes A yarn roll storage platform is located near the yarn roll drive unit for placing yarn rolls; A yarn roll gripping robot is used to grab yarn rolls from a yarn roll storage table and place the yarn rolls onto an air shaft. A yarn rack storage platform is located near the yarn rack drive unit for placing yarn racks; The yarn rack gripping robot is used to grab yarn racks from the yarn rack storage platform and place them on a chuck, which then clamps the yarn racks.

4. The fully automatic impregnated yarn sample preparation equipment according to claim 1, characterized in that, Also includes The impregnation robot is used to pick up the yarn frame with yarn wound on it from the chuck, move the yarn frame to the impregnation and suction unit to impregnate the yarn, and after the impregnation is completed, cooperate with the impregnation and suction unit to suction the yarn. The impregnation robot is connected to the central control system, which controls the impregnation time of the yarn.

5. The fully automatic impregnated yarn making machine according to claim 4, characterized in that, The impregnation and suction unit includes A resin tank, which contains resin; A gantry frame is mounted on a fixed object and is driven to move horizontally by a drive unit; The unwinding roller is rotatably connected to the gantry frame at both ends, and absorbent paper is provided on the unwinding roller; The take-up roller, whose two ends are rotatably connected to the gantry frame and driven to rotate by the take-up motor, is used to take up the adhesive paper. After being impregnated with resin, the yarn frame is supported and suspended above the resin tank by an impregnation robot. The gantry moves to the point where the adhesive-absorbing paper adheres to the yarn frame, and the winding motor drives the winding roller to wind up the adhesive-absorbing paper to absorb excess resin on the yarn frame.

6. The fully automatic impregnated yarn making machine according to claim 5, characterized in that, It also includes a resin preparation and delivery unit, which includes There are three resin storage tanks, one for storing the resin base, one for storing the curing agent, and one for storing the diluent. There are three metering pumps, one of which is connected to each resin storage tank. A stirring cup is used to receive the resin base, curing agent, and diluent pumped from the resin storage tank by a metering pump; The lifting and stirring mechanism is used to extend into the stirring cup to stir the resin main agent, curing agent and diluent to make the resin main agent, curing agent and diluent mix evenly; The side-tilting mechanism is used to tilt the mixing cup towards the resin tank after the resin main agent, curing agent and diluent in the mixing cup are mixed evenly, so that the resin in the mixing cup is poured into the resin tank.

7. The fully automatic impregnated yarn making machine according to claim 6, characterized in that, The resin storage tank is equipped with a liquid level sensor and a heating and insulation jacket, which are used to observe the liquid level in the resin storage tank and to maintain the stability of the resin viscosity, respectively.

8. The fully automatic impregnated yarn making machine according to claim 1, characterized in that, The curing unit includes The oven door faces the side of the glue impregnation and glue absorption unit. The oven control system is connected to the central control system, which controls the heating and curing time and temperature of the oven. The curing robot is positioned between the curing unit and the impregnation and suction unit. It is used to pick up the yarn frame after suction from the impregnation robot and place it in the drying oven.

9. The fully automatic impregnated yarn making machine according to claim 1, characterized in that, It also includes a post-processing unit, which includes The cutting robot is equipped with a yarn cutting blade or scissors at its end. The curing robot takes the yarn rack out of the oven and the cutting robot cuts the two ends of the yarn from the yarn rack. A collection basket, located below the cutting robot, is used to collect yarn that falls from the yarn rack. A label printing and pasting robot is used to print QR codes containing yarn information and paste the QR codes onto collection bins.

10. A fully automated method for preparing samples of impregnated yarn, characterized in that, Includes the following steps: Step 1, parameter setting: Set the parameters for sample preparation of the impregnated yarn through the central control system; Step 2: The yarn is wound by the yarn roll drive device. First, the yarn roll is placed on the air shaft, and the yarn frame is clamped on the chuck. Then, the yarn guide device pulls the yarn from the yarn roll to the yarn frame. The fixing device attaches the beginning of the yarn to the yarn frame. The servo motor drives the chuck to rotate and wind the yarn on the yarn roll onto the yarn frame. After the yarn is wound, the fixing device attaches the end of the yarn to the yarn frame and cuts the yarn. Step 3: The impregnation robot grabs the yarn frame from the chuck, impregnates the yarn frame in the resin tank containing resin, and then lifts the yarn frame out of the impregnation tank and suspends it above the impregnation tank. The gantry moves toward the yarn frame and the take-up shaft takes up the absorbent paper on the unwinding roller. The absorbent paper absorbs the excess resin on the yarn frame. Step 4: The curing robot grabs the yarn frame from the impregnation robot and puts it into the oven for heating to cure the resin. Then the curing robot takes the yarn frame out of the oven. Step 5: The cutting robot cuts the yarn from the yarn rack and drops it into the collection box. The label printing and pasting robot prints a QR code containing the yarn information and pastes it on the collection box.

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