A continuous fiber reinforced resin prepreg impregnation device

Abstract

The present invention belongs to the field of additive manufacturing of composite materials, and discloses an impregnation device for continuous fiber reinforced resin prepreg filaments, which includes an impregnation unit and a shaping unit. Aiming at the problem of poor fiber / resin impregnation degree caused by insufficient impregnation external force during the preparation of prepreg filaments, an ellipsoidal double-wave flow channel is designed, which can not only improve the impregnation external force but also make the resin more evenly distributed around the fibers; in addition, a shaping module with a resin overflow function is also designed. By continuously removing the overflow resin with an automated blade, the resin in the impregnation flow channel is continuously replaced, thus solving the problem of oxidation degradation of the resin caused by long-term residence in the flow channel. Through the coordinated operation of the highly impregnating impregnation unit and the automated shaping unit, the present invention realizes the preparation of prepreg filaments with a high impregnation degree and significantly improves the surface quality of the prepreg filaments at the same time.

Description

Technical Field

[0001] The present invention belongs to the field of additive manufacturing of composite materials and relates to an impregnation device for continuous fiber reinforced resin prepreg filaments. Background Art

[0002] The continuous fiber reinforced resin additive manufacturing technology has the advantages of high flexibility and no need for mold manufacturing, and has been widely used in industries such as automobiles and sports goods in recent years. The continuous fiber reinforced resin prepreg filament is the raw material for continuous fiber reinforced resin additive manufacturing. Its impregnation degree directly determines the mechanical properties of the continuous fiber reinforced resin printed component, and the surface quality of the filament determines the accuracy of the printed sample. However, in the existing prepreg filaments during the preparation process, there are problems such as poor fiber / resin impregnation degree due to insufficient impregnation external force. In addition, there are also problems such as fiber eccentricity in the prepreg filament due to uneven resin distribution in the impregnation mold and poor surface quality of the filament due to long-term residence and oxidation degradation of the resin in the impregnation mold. Therefore, to achieve the preparation of prepreg filaments with high impregnation and high surface quality, it is necessary to develop an impregnation device for prepreg filaments with a high fiber / resin impregnation rate and uniform flow of molten resin.

[0003] To improve the impregnation degree of continuous fiber reinforced thermoplastic prepreg filaments, Patent CN109176962B and Patent CN101474868A adopt an impregnation process of placing multiple impregnation rollers in the impregnation mold, and extrude the molten resin into the fiber tow through the pressure between the continuous fiber and the impregnation roller. Both of these patents have significantly improved the impregnation degree of the prepreg filament, but their impregnation mold chamber has a large space and high heating energy consumption, resulting in long-term residence and oxidation degradation of the resin in the mold, which in turn affects the surface quality of the prepreg filament. Patent CN118163266A effectively improves the problem of excessive tension of the fiber dry filament through the impregnation process of the wave channel, and at the same time, by improving the impregnation roller into a wave channel mold, the chamber volume is greatly reduced, thereby reducing the content of the resin staying in the chamber for a long time, thus improving the surface quality of the prepreg filament. This patent has significantly reduced the content of the resin staying in the impregnation chamber on the basis of the above patents and improved the surface quality of the prepreg filament. However, this patent ignores that the molten resin will be squeezed away from the wire and accumulate on the side wall of the mold during the mold closing process of the wave channel, resulting in uneven resin distribution in the mold and causing fiber eccentricity problems. Therefore, it is necessary to comprehensively consider the requirements for fiber / resin impregnation degree, resin residence time and resin distribution during the preparation process of prepreg filaments, and develop an impregnation device with high impregnation pressure and continuous resin flow and alternation, so as to achieve the high-quality and high-efficiency preparation of continuous fiber prepreg filaments. Summary of the Invention

[0004] A continuous fiber reinforced resin prepreg impregnation device of the present invention mainly includes an ellipsoidal wavy flow channel, which can make the resin more evenly distributed around the wire during the mold closing process while retaining the high impregnation external force of the traditional wavy flow channel, effectively solving the problem of fiber eccentricity in the prepreg; in addition, a shaping module with a resin overflow function is designed. The prepreg passes through a high-precision shaping nozzle to achieve solidification and forming, and the excess resin flows out from the overflow port. The lead screw motor drives the blade to reciprocate to continuously remove the resin at the overflow port, so that the resin in the impregnation flow channel is continuously circulated and replaced, solving the problem of oxidation degradation of the resin staying in the flow channel for a long time, thereby improving the surface quality and mechanical properties of the prepreg.

[0005] The technical solution of the present invention:

[0006] A continuous fiber reinforced resin prepreg impregnation device includes an impregnation unit and a shaping unit; the impregnation unit is mainly composed of an ellipsoidal double wavy flow channel with controllable impregnation pressure, mainly improving the impregnation external force and the evenness of resin distribution during the impregnation process of the fiber wire; the shaping unit is fixed on the side wall of the impregnation unit by screws to fix the diameter of the prepreg and automatically remove the overflow resin, thereby realizing the continuous replacement of the molten resin in the flow channel.

[0007] The impregnation unit includes a base A1, a support base A2, a connecting block A3, a lower heat insulation plate A4, a lower flow channel A5, an upper flow channel A6, a lower heating hole A7, an upper heating hole A8, an upper heat insulation plate A9, a left moving block A10, a right moving block A11, a bearing seat A12, a handwheel A13, a resin inlet A14, and a fiber dry filament inlet A15; the support base A2 is fixed on the base A1 by screws, the connecting block A3 is connected to the support base A2 through a dovetail groove, the lower heat insulation plate A4 is fixed on the support base A2 by screws to prevent the heat of the lower flow channel A5 from transferring downward, the lower flow channel A5 and the upper flow channel A6 cooperate to achieve the impregnation of fiber / resin, the lower heating hole A7 is used to place a heating rod to heat the lower flow channel A5, the upper heating hole A8 is used to place a heating rod to heat the upper flow channel A6, so that the resin is in a molten state, the upper heat insulation plate A9 is fixed on the upper flow channel A6 by screws to prevent the heat of the upper flow channel A6 from continuously transferring upward, the left moving block A10 and the right moving block A11 are respectively fixed on the upper heat insulation plate A9 by screws, the bearing seat A12 is fixed on the upper heat insulation plate A9 by screws, the bearing seat A12 is located between the left moving block A10 and the right moving block A11, and the left and right sides of the bearing seat A12 are matched with the protruding parts at the top of the left moving block A10 and the right moving block A11 through grooves; the upper end of the handwheel A13 is connected to the upper end of the support base A2 through a thread, the lower end of the handwheel A13 is connected to the bearing seat A12, when the handwheel A13 is rotated, due to the effect of the thread, the handwheel A13 will first drive the bearing seat A12 to move up and down, and then drive the left moving block A10 and the right moving block A11 to move up and down through the grooves of the bearing seat A12, and finally drive the upper flow channel A6 to move; the resin inlet A14 is fixed on the front end of the upper flow channel A6 by screws to introduce resin; the fiber dry filament inlet A15 is opened on the lower flow channel A5 to penetrate the fiber dry filament, and the fiber dry filament outlet A16 is opened on the lower flow channel A5 to penetrate the fiber dry filament.

[0008] The shaping unit includes a lead screw motor B1, a fixed seat B2, a material bin B3, a motor bracket B4, a guide rail B5, a slider B6, a blade clamp B7, an overflow port B8, a nozzle B9, a temperature measurement port B10, a heating port B11, a heating block B12, a blade fixed seat B13, a blade B14, and a bottom plate B15; the lead screw motor B1 is used to provide power for the slider B6, the material bin B3 is fixed on the bottom plate B15 and is used to hold the excess resin scraped by the blade B14; the fixed seat B2 is fixed on the bottom plate B15, the motor bracket B4 is fixed on the fixed seat B2, the guide rail B5 is fixed on the fixed seat B2 by screws, the slider B6 is fixed on the guide rail B5 by screws and can move up and down through the rotation of the lead screw motor B1, the blade clamp B7 is fixed on the fixed seat B2 and there is a small gap above it through which the blade B13 can pass, the overflow port B8 is used to discharge the excess resin during the shaping process, the nozzle B9 is connected to the left side of the heating block B12 by threads to ensure the final diameter of the wire material, the temperature measurement port B10 is used to place a thermocouple for temperature measurement, the heating port B11 is used to place a heating rod to heat the heating block B12, the heating block B12 is fixed on the left end of the downstream channel A5 by screws, that is, the threaded holes on both sides of the fiber dry wire outlet A16, and the blade B14 is fixed on the blade fixed seat B13 by screws to scrape the excess resin;

[0009] All the wavy channels need to be polished, and the surface roughness is not higher than Ra1.6 to avoid scratching or breaking the fiber dry wires. The cross-sectional shape of the wavy channel is an ellipsoid. To ensure uniform and appropriate resin distribution around the fiber dry wires during the impregnation process, the width W1 of the channel, the depth H1 of the channel, and the diameter d of the pre-impregnated wire need to satisfy: 2d W1 4d, d H1 2d.

[0010] In the downstream channel A5 of the impregnation unit A, it is necessary to ensure that after the resin is filled, the molten resin continuously flows towards the shaping unit B. Therefore, the height H2 from the center of the fiber dry wire inlet A15 to the bottom of the downstream channel, the height H3 from the center of the fiber dry wire outlet A16 to the bottom of the downstream channel, the diameter d2 of the fiber dry wire inlet A15, the diameter d3 of the fiber dry wire outlet A16, the angle α between the fiber dry wire inlet A15 and the bottom of the downstream channel, and the angle β between the fiber dry wire outlet A16 and the bottom of the downstream channel need to satisfy: H3 - d3 sin H2 - d2 sin .

[0011] The upper flow channel can be adjusted up and down by turning a hand wheel, thereby changing the distance between the upper flow channel and the lower flow channel, thereby changing the spacing between the fiber dry wire and the lower flow channel, thereby achieving the purpose of changing the impregnation external force and facilitating the initial threading.

[0012] The blade B14 in the shaping unit moves up and down driven by the motor to remove the excess resin flowing out of the overflow port. When the blade B14 moves upward, the resin is in a molten state, and when the blade B14 moves downward, the resin is in a solidified state, and when it moves to the gap of the blade clamp B7, it is scraped into the silo. To ensure the smoothness of the entire process, the height L1 from the gap of the blade clamp B7 to the overflow port, the overflow port diameter d4, the blade movement speed v and the resin solidification time t must meet the following requirements: .

[0013] The moving speed of the blade in the shaping unit can be adjusted by the lead screw motor, and the solidification time of different types of resins can be matched by controlling the rotation speed of the lead screw motor.

[0014] The beneficial effects of the present invention are as follows: through the coordinated work of the ellipsoidal double-channel impregnation unit and the shaping unit with resin removal function, the problem of insufficient prepreg performance caused by uneven resin distribution around the fiber dry wire and long-term oxidative degradation of the resin during the preparation process of continuous fiber reinforced resin prepreg is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the overall structure of a continuous fiber reinforced resin prepreg impregnation device of the present invention, which is suitable for preparing continuous fiber reinforced resin prepreg;

[0016] Figure 2 It is a schematic diagram of the structure of an impregnation unit of a continuous fiber-reinforced resin prepreg impregnation device of the present invention, which is used for fiber / resin impregnation;

[0017] Figure 3 and Figure 4 It is a structural schematic diagram of a shaping unit of a continuous fiber reinforced resin prepreg impregnation device of the present invention, which is used to ensure the shape contour of the prepreg and remove excess resin;

[0018] Figure 5 The present invention is a schematic diagram of a lower runner in a continuous fiber reinforced resin prepreg impregnation device, which describes the relevant dimensional relationship in the runner; wherein (a) is a cross-sectional view of the lower runner, and (b) is a partial cross-sectional view of the melting cavity of the lower runner;

[0019] Figure 6 It is a schematic diagram of the position of a blade in a continuous fiber reinforced resin prepreg impregnation device of the present invention, which describes the relationship between the blade moving distance and the resin solidification time;

[0020] Figure 7 Cross-sectional views of the continuous fiber-reinforced PA-based prepreg filaments prepared in the examples, where (a) is the cross-sectional view of the prepreg filaments prepared by the traditional method, and (b) is the cross-sectional view of the prepreg filaments prepared by this impregnation device;

[0021] In the figure: A1 - base, A2 - support base, A3 - connecting block, A4 - lower heat insulation plate, A5 - lower flow channel, A6 - upper flow channel, A7 - lower heating hole, A8 - upper heating hole, A9 - upper heat insulation plate, A10 - left moving block, A11 - right moving block, A12 - bearing seat, A13 - handwheel, A14 - resin inlet, A15 - dry fiber inlet, A16 - dry fiber outlet; B1 - lead screw motor, B2 - fixed seat, B3 - storage bin B3, B4 - motor bracket, B5 - guide rail, B6 - slider, B7 - blade clamp, B8 - overflow port, B9 - nozzle, B10 - temperature measurement port, B11 - heating port, B12 - heating block, B13 - blade fixed seat, B14 - blade, and B15 - bottom plate. Specific embodiments

[0022] The following further illustrates the specific embodiments of the present invention in conjunction with the drawings and technical solutions.

[0023] Example 1

[0024] Taking the preparation of continuous fiber-reinforced resin prepreg filaments as an example, 1K continuous fiber dry filaments and PA resin powder are selected as raw materials for the preparation of continuous fiber-reinforced PA-based prepreg filaments. The target filament is a prepreg filament with a diameter of 0.4 mm. According to the material properties, appropriate process parameters are selected for this example; the flow channel temperature is 260 °C, the shaping unit is 260 °C, and the blade moving speed is 10 mm / s.

[0025] An impregnation device for continuous fiber-reinforced resin prepreg filaments, comprising an impregnation unit and a shaping unit;

[0026] The impregnation unit A includes a base A1, a support base A2, a connecting block A3, a lower heat insulation plate A4, a lower flow channel A5, an upper flow channel A6, lower heating holes A7, upper heating holes A8, an upper heat insulation plate A9, a left moving block A10, a right moving block A11, a bearing seat A12, a handwheel A13, a resin inlet A14, a fiber dry filament inlet A15, and a fiber dry filament outlet A16; the support base A2 is fixed on the base A1, and the connecting block A3 is connected to the support base A2 through a dovetail groove; the lower heat insulation plate A4 is fixed on the support base A2 to prevent the heat of the lower flow channel A5 from being transferred downward; the lower flow channel A5 cooperates with the upper flow channel A6 to achieve the impregnation of fiber / resin; the lower heating holes A7 are opened on the lower flow channel A5 for placing heating rods to heat the lower flow channel A5; the upper heating holes A8 are opened on the upper flow channel A6 for placing heating rods to heat the upper flow channel A6 to keep the resin in a molten state; the upper heat insulation plate A9 is fixed on the upper flow channel A6 to prevent the heat of the upper flow channel A6 from being continuously transferred upward; both the left moving block A10 and the right moving block A11 are fixed on the upper heat insulation plate A9, and the bearing seat A12 is fixed on the upper heat insulation plate A9, and the bearing seat A12 is located between the left moving block A10 and the right moving block A11; the upper end of the handwheel A13 is connected to the upper end of the support base A2 through a thread, and the lower end of the handwheel A13 is connected to the bearing seat A12. By rotating the handwheel A13, due to the effect of the thread, the handwheel A13 will first drive the bearing seat A12 to move up and down, and then drive the left moving block A10 and the right moving block A11 to move up and down, and finally drive the upper flow channel A6 to move; the resin inlet A14 is located at the front end of the upper flow channel A6 for introducing resin; the fiber dry filament inlet A15 is opened on the lower flow channel A5 for threading the fiber dry filament, and the fiber dry filament outlet A16 is opened on the lower flow channel A5 for threading out the fiber dry filament.

[0027] The shaping unit B includes a lead screw motor B1, a fixed seat B2, a material bin B3, a motor bracket B4, a guide rail B5, a slider B6, a blade clamp B7, an overflow port B8, a nozzle B9, a temperature measurement port B10, a heating port B11, a heating block B12, a blade fixed seat B13, a blade B14, and a bottom plate B15; the lead screw motor B1 is used to provide power for the slider B6; the material bin B3 is fixed on the bottom plate B15 and is used to hold the excess resin scraped by the blade B14; the fixed seat B2 is fixed on the bottom plate B15, the motor bracket B4 is fixed on the fixed seat B2, the guide rail B5 is fixed on the fixed seat B2, the slider B6 is fixed on the guide rail B5, and the up and down movement of the slider B6 is realized by the rotation of the lead screw motor B1; the blade clamp B7 is fixed on the fixed seat B2, and there is a gap above it for the blade B14 to pass through; the overflow port B8 is opened on the heating block B12 and is used to discharge the excess resin during the shaping process; the nozzle B9 is connected to the heating block B12 and is used to ensure the final diameter of the prepreg filament; the temperature measurement port B10 is opened on the heating block B12 and is used to place a thermocouple to measure the temperature; the heating port B11 is opened on the heating block B12 and is used to place a heating rod to heat the heating block B12; the heating block B12 is fixed to the left end of the downstream channel A5 with screws; the blade B14 is fixed on the blade fixed seat B13 and is used to scrape off the excess resin;

[0028] First, before the experiment starts, the 1K carbon fiber dry filament is threaded through the impregnation unit from the fiber dry filament inlet and then out of the nozzle in the shaping unit. Start the heating rod in the impregnation unit and set the temperature that the impregnation unit needs to reach: 260 °C. The K-type thermocouple measures the temperature in real time and feeds the temperature back to the temperature controller. After heating for five minutes, the entire impregnation unit reaches 260 °C. Start the heating rod in the shaping unit to make the temperature of the shaping unit also reach 260 °C. Start the resin feeding mechanism, and the resin flows into the downstream channel and reaches the molten state in the channel. The fiber dry filament will be prepared while being impregnated under the drive of the winding module. The resin will gradually flow towards the shaping module driven by the fiber dry filament. The nozzle of the shaping module will ensure that the diameter of the wire material is 0.4 mm. The excess resin will be scraped off and discharged outwards from the overflow port. The blade moves up and down continuously driven by the motor. When moving upwards, it shovels the resin accumulated at the overflow port and adheres it to the blade. When the blade moves down to the gap of the blade clamp, the resin solidifies and is scraped off and falls into the material bin, and then moves upwards again, repeating this process, so as to ensure that the resin in the channel is continuously replaced and a continuous fiber-reinforced PA resin prepreg filament with better performance is obtained. The prepared prepreg filament is cured with resin, polished with a grinding and polishing machine, and then observed under a super-depth-of-field microscope. It can be seen that the fiber resin distribution in the prepreg filament prepared by this impregnation device is uniform, and the fiber resin is fully impregnated. At the same time, a tensile machine is used to test the performance of this prepreg filament, and the tensile strength of this wire material reaches 600 MPa.

[0029] An impregnation device provided by the present invention has an impregnation flow channel composed of an ellipsoidal wavy flow channel. The shaping module has the function of automatically removing excess resin, and finally realizes the preparation of continuous fiber composite prepreg wires with high impregnation and high surface quality.

Claims

1. A continuous fiber reinforced resin prepreg impregnation device, characterized in that: The continuous fiber reinforced resin prepreg impregnation device comprises an impregnation unit (A) and a shaping unit (B); the impregnation unit (A) is mainly composed of an ellipsoidal double-wave flow channel with controllable impregnation pressure, which is used to improve the impregnation external force and the uniformity of resin distribution during the prepreg impregnation process; the shaping unit (B) is fixed to the side wall of the impregnation unit (A) to achieve the fixation of the prepreg diameter and the automatic removal of overflow resin, and to achieve the continuous replacement of molten resin in the ellipsoidal double-wave flow channel; The impregnation unit (A) comprises a base (A1), a support base (A2), a connecting block (A3), a lower heat insulation plate (A4), a lower flow channel (A5), an upper flow channel (A6), a lower heating hole (A7), an upper heating hole (A8), an upper heat insulation plate (A9), a left moving block (A10), a right moving block (A11), a bearing seat (A12), a hand wheel (A13), a resin inlet (A14), a fiber dry filament inlet (A15) and a fiber dry filament outlet (A16); the support base (A2) is fixed on the base (A1), and the connecting block (A3) is connected to the support base through a dovetail groove and the support base. (A2) is connected with the lower heat insulation board (A4) fixed on the support seat (A2) to prevent the heat of the lower flow channel (A5) from transferring downward; the lower flow channel (A5) and the upper flow channel (A6) cooperate to achieve the impregnation of fiber / resin; the lower heating hole (A7) is opened on the lower flow channel (A5) to place the heating rod to heat the lower flow channel (A5); the upper heating hole (A8) is opened on the upper flow channel (A6) to place the heating rod to heat the upper flow channel (A6) to make the resin in a molten state; the upper heat insulation board (A9) is fixed on the upper flow channel (A6) to prevent the upper flow channel from The heat of (A6) is continuously transferred upward; the left moving block (A10) and the right moving block (A11) are both fixed on the upper heat insulation board (A9), the bearing seat (A12) is fixed on the upper heat insulation board (A9), the bearing seat (A12) is located between the left moving block (A10) and the right moving block (A11), and the left and right sides of the bearing seat (A12) are matched with the protruding parts of the top of the left moving block (A10) and the right moving block (A11) through grooves; the upper end of the handwheel (A13) is connected to the upper end of the support seat (A2) through a thread, and the lower end of the handwheel (A13) is connected to the bearing seat (A 12), the hand wheel (A13) is turned. Due to the effect of the thread, the hand wheel (A13) first drives the bearing seat (A12) to move up and down, and then drives the left moving block (A10) and the right moving block (A11) to move up and down through the groove of the bearing seat (A12), and finally drives the upper flow channel (A6) to move; the resin inlet (A14) is located at the front end of the upper flow channel (A6) for introducing the resin; the fiber dry filament inlet (A15) is opened on the lower flow channel (A5) for inserting the fiber dry filaments, and the fiber dry filament outlet (A16) is opened on the lower flow channel (A5) for inserting the fiber dry filaments; The shaping unit (B) comprises a screw motor (B1), a fixing seat (B2), a hopper (B3), a motor bracket (B4), a guide rail (B5), a slider (B6), a blade clamp (B7), an overflow port (B8), a nozzle (B9), a temperature measuring port (B10), a heating port (B11), a heating block (B12), a blade fixing seat (B13), a blade (B14) and a base plate (B15); the screw motor (B1) is used to provide power for the slider (B6); the hopper (B3) is fixed on the base plate (B15) and is used to hold excess resin removed by the blade (B14); the fixing seat (B2) is fixed on the base plate (B15), the motor bracket (B4) is fixed on the fixing seat (B2), the guide rail (B5) is fixed on the fixing seat (B2), the slider (B6) is fixed on the guide rail (B5), and the fixing seat (B2) is fixed on the guide rail (B5). The rotation of the motor (B1) enables the slider (B6) to move up and down; the blade clamp (B7) is fixed on the fixing seat (B2), and a gap is left on the top for the blade (B14) to pass through; the overflow port (B8) is opened on the heating block (B12) to discharge the excess resin in the shaping process; the nozzle (B9) is connected to the heating block (B12) to ensure the final diameter of the prepreg; the temperature measuring port (B10) is opened on the heating block (B12) to place a thermocouple to measure the temperature; the heating port (B11) is opened on the heating block (B12) to place a heating rod to heat the heating block (B12); the heating block (B12) is fixed to the left end of the lower flow channel (A5) with screws, corresponding to the threaded holes on both sides of the fiber dry wire outlet (A16); the blade (B14) is fixed on the blade fixing seat (B13) to remove the excess resin; The lower flow channel (A5) and the upper flow channel (A6) in the impregnation unit (A) are both polished, and the surface roughness is not higher than Ra1.6 to avoid scratching or breaking the fiber filaments; The lower flow channel (A5) and the upper flow channel (A6) together constitute a double wavy flow channel. The cross-sectional shape of the wavy flow channel is an ellipsoid. To ensure that the resin around the fiber dry filaments is evenly distributed and appropriate during the impregnation process, the width of the wavy flow channel is W1, the depth of the wavy flow channel is H1, and the diameter of the prepreg is d, which must meet the following conditions: 2d≤W1≤4d, d≤H1≤2d; The downflow channel (A5) in the impregnation unit (A) needs to ensure that after the resin is filled, the molten resin continuously flows to the shaping unit (B). Therefore, the height from the center of the fiber dry fiber inlet (A15) in the downflow channel (A5) to the bottom of the downflow channel is H2, the height from the center of the fiber dry fiber outlet (A16) to the bottom of the downflow channel is H3, the diameter of the fiber dry fiber inlet (A15) is d2, the diameter of the fiber dry fiber outlet (A16) is d3, the angle α between the fiber dry fiber inlet (A15) and the bottom of the downflow channel, and the angle β between the fiber dry fiber outlet (A16) and the bottom of the downflow channel need to satisfy: H3- d3 sin H2- d2 sin ; The blade (B14) in the shaping unit (B) moves up and down driven by a motor to remove excess resin flowing out of the overflow port (B8). When the blade (B14) moves upward, the resin is in a molten state. When the blade (B14) moves downward, the resin is in a solidified state. When the blade (B14) moves to the gap of the blade clamp (B7), the resin is scraped off into the silo (B3). To ensure the smoothness of the whole process, the height L1 from the gap of the blade clamp (B7) to the overflow port (B8), the diameter d4 of the overflow port (B8), the movement speed v of the blade (B14) and the resin solidification time t must meet the following conditions: .

2. The continuous fiber reinforced resin prepreg impregnation device according to claim 1, characterized in that: The upper flow channel (A6) in the impregnation unit (A) is adjusted in up and down position by turning a hand wheel (A13), thereby changing the distance between the upper flow channel (A6) and the lower flow channel (A5), thereby changing the spacing between the fiber dry filaments and the lower flow channel (A5).

3. The continuous fiber reinforced resin prepreg impregnation device according to claim 1, characterized in that: The moving speed of the blade (B14) in the shaping unit (B) is adjusted by the lead screw motor (B1), and the solidification time of different types of resins is matched by controlling the rotation speed of the lead screw motor (B1).

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