Continuous fiber reinforced resin prepreg filament dipping device

Abstract

The invention belongs to the field of composite material additive manufacturing, and discloses a continuous fiber reinforced resin prepreg filament dipping device which comprises a dipping unit and a shaping unit. In order to solve the problem of poor fiber / resin impregnation degree caused by insufficient impregnation external force in the preparation process of the prepreg filaments, an ellipsoidal double-wave runner is designed, and resin can be more uniformly distributed around fibers while the impregnation external force is increased; besides, a shaping module with a resin overflow function is also designed, and the overflow resin is continuously removed by utilizing an automatic blade, so that the resin in the impregnation runner is continuously changed, and the problem of oxidative degradation caused by long-term staying of the resin in the runner is solved. Through cooperative work of the high-impregnation impregnation unit and the automatic shaping unit, preparation of high-impregnation-degree prepreg filaments is achieved, and meanwhile the surface quality of the prepreg filaments is remarkably improved.

Description

Technical Field

[0001] The invention belongs to the field of composite material additive manufacturing and relates to a continuous fiber reinforced resin prepreg impregnation device. Background Art

[0002] Continuous fiber reinforced resin additive manufacturing technology has the advantages of high flexibility and no need for mold manufacturing. In recent years, it has been widely used in the automotive, sporting goods and other industries. Continuous fiber reinforced resin prepreg 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 components, and the surface quality of the wire determines the accuracy of the printed sample. However, the existing prepreg has the problem of poor fiber / resin impregnation degree due to insufficient impregnation external force during the preparation process. In addition, there are also problems such as fiber eccentricity in the prepreg due to uneven resin distribution in the impregnation mold and poor wire surface quality due to long-term oxidative degradation of the resin in the impregnation mold. Therefore, in order to achieve the preparation of high-impregnation and high-surface quality prepreg, it is necessary to develop a prepreg impregnation device with high fiber / resin impregnation rate and uniform flow of molten resin.

[0003] In order to improve the impregnation degree of continuous fiber reinforced thermoplastic prepreg, patent CN109176962B and patent CN101474868A adopt an impregnation process in which multiple impregnation rollers are placed in an impregnation mold, and the molten resin is squeezed into the fiber bundle by the pressure between the continuous fiber and the impregnation roller. Both patents significantly improve the impregnation degree of the prepreg, but the impregnation mold cavity space is large and the heating energy consumption is high, resulting in the resin staying in the mold for a long time and oxidative degradation, thereby affecting the surface quality of the prepreg. Patent CN118163266A effectively improves the problem of excessive tension of the fiber dry wire through the impregnation process of the wave flow channel. At the same time, by improving the impregnation roller to a wave flow channel mold, the chamber volume is greatly reduced, thereby reducing the content of the resin that stays in the chamber for a long time, thereby improving the surface quality of the prepreg. This patent significantly reduces the content of the resin that stays in the impregnation chamber on the basis of the above patents, and improves the surface quality of the prepreg. However, the patent ignores that during the mold closing process, the molten resin in the wave channel will be squeezed away from the wire and accumulated on the side wall of the mold, resulting in uneven resin distribution in the mold and causing fiber eccentricity. Therefore, it is necessary to comprehensively consider the requirements for fiber / resin impregnation degree, resin residence time and resin distribution during the prepreg preparation process, and develop an impregnation device with high impregnation pressure and continuous resin flow and change, so as to achieve high-quality and efficient preparation of continuous fiber prepreg. Summary of the invention

[0004] The present invention discloses a continuous fiber reinforced resin prepreg impregnation device, which mainly comprises 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, and the prepreg passes through a high-precision shaping nozzle to achieve solidification and forming, and excess resin flows out from the overflow port, and the screw motor drives the blade to reciprocate to achieve continuous removal of the overflow port resin, so that the resin in the impregnation flow channel is continuously circulated, solving the problem of oxidative degradation caused by 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 comprises an impregnation unit and a shaping unit; the impregnation unit is mainly composed of an ellipsoidal double-wave flow channel with controllable impregnation pressure, which mainly improves the impregnation external force and the uniformity of resin distribution during the fiber impregnation process; the shaping unit is fixed to the side wall of the impregnation unit by screws to fix the prepreg diameter and automatically remove overflow resin, thereby realizing continuous replacement of molten resin in the flow channel.

[0007] The impregnation unit includes a base A1, a support seat A2, a connecting block A3, a lower heat insulation board 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 board A9, a left moving block A10, a right moving block A11, a bearing seat A12, a hand wheel A13, and a resin inlet A14. , fiber dry wire inlet A15; the support seat A2 is fixed to the base A1 by screws, the connecting block A3 is connected to the support seat A2 by a dovetail groove, the lower insulation board A4 is fixed to the support seat 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 fiber / resin impregnation, 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 insulation board A9 is fixed to the upper flow channel A6 by screws to prevent the heat of the upper flow channel A6 from transferring upward continuously, the left moving block A10 and the right moving block A11 are fixed to the upper insulation board A9 by screws respectively, the bearing seat A12 is fixed to the upper insulation board A9 by screws, the bearing seat A12 It 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 cooperate 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 A12. When the handwheel A13 is turned, due to the action 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 groove of the bearing seat A12, and finally drive the upper flow channel A6 to move; the resin inlet A14 is fixed to the front end of the upper flow channel A6 by screws for passing 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 passing the fiber dry filaments.

[0008] The shaping unit includes a screw motor B1, a fixing seat B2, a silo 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 silo B3 is fixed on the base plate B15, and is used to hold the 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 by screws, and the slider B6 is fixed on the guide rail B15 by screws. 5, and can be moved up and down by 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 on the top of it for the blade B13 to pass through, the overflow port B8 is used to discharge the excess resin in the shaping process, the nozzle B9 is connected to the left side of the heating block B12 by threading to ensure the final diameter of the wire, the temperature measuring port B10 is used to place a thermocouple to measure the temperature, the heating port B11 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 lower flow 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 to the blade fixing seat B13 by screws to remove excess resin;

[0009] The wave channel needs to be polished, and the surface roughness is not higher than Ra1.6 to avoid scratching the fiber filaments. The cross-sectional shape of the wave channel is ellipsoidal. In order to ensure that the resin is evenly distributed around the fiber filaments during the impregnation process, the width W1 of the channel, the depth H1 of the channel and the diameter d of the prepreg must meet the following requirements: 2d W1 4d,d H1 2d.

[0010] The lower flow 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 filament inlet A15 in the lower flow channel A5 to the bottom of the lower flow channel is H2, the height from the center of the fiber dry filament outlet A16 to the bottom of the lower flow channel is H3, the diameter of the fiber dry filament inlet A15 is d2, the diameter of the fiber dry filament outlet A16 is d3, the angle α between the fiber dry filament inlet A15 and the bottom of the lower flow channel, and the angle β between the fiber dry filament outlet A16 and the bottom of the lower flow channel must 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 The figures are cross-sectional views of continuous fiber reinforced PA-based prepregs prepared in the examples, wherein (a) is a cross-sectional view of a prepreg prepared in a conventional manner, and (b) is a cross-sectional view of a prepreg prepared by the impregnation device;

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

[0022] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0023] Example 1

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

[0025] A continuous fiber reinforced resin prepreg impregnation device, comprising an impregnation unit and a shaping unit;

[0026] The impregnation unit A includes a base A1, a support seat A2, a connecting block A3, a lower heat insulation board 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 board 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 seat A2 is fixed on the base A1, and the connecting block A3 is connected to the support seat A2 through a dovetail groove; the lower heat insulation board A4 is 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 realize the impregnation of the fiber / resin; the lower heating hole A7 is opened on the lower flow channel A5 to place a heating rod to heat the lower flow channel A5; the upper heating hole A8 is opened on the upper flow channel A6 to place a 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 heat of the upper flow channel A6 from being continuously transferred upward; the left moving block A10 and the right moving block A11 are both fixed on the upper heat insulation board A9, and the bearing seat A12 is fixed on the upper heat insulation board 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 seat A2 through a thread, and the lower end of the handwheel A13 is connected to the bearing seat A12. When the handwheel A13 is turned, due to the action 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, which is used to pass the resin; the fiber dry filament inlet A15 is opened on the lower flow channel A5, which is used to insert the fiber dry filaments, and the fiber dry filament outlet A16 is opened on the lower flow channel A5, which is used to insert the fiber dry filaments.

[0027] The shaping unit B comprises a lead 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 lead screw motor B1 is used to provide power for the slider B6; the hopper B3 is fixed on the base plate B15 to hold the 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 lead screw motor B1 is used to provide power for the slider B6; the hopper B3 is fixed on the base plate B15 to hold the 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 The rotation of the machine B1 realizes the up and down movement of the slider B6; the blade clamp B7 is fixed on the fixed seat B2, and a gap is left above it 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 the thermocouple to realize temperature measurement; the heating port B11 is opened on the heating block B12 to place the 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; the blade B14 is fixed on the blade fixing seat B13 to remove the excess resin;

[0028] First, before the experiment begins, 1K carbon fiber dry filaments are passed from the fiber dry filament entrance to the impregnation unit, and then passed through the nozzle in the shaping unit, the heating rod in the impregnation unit is started, and the temperature to be reached by the impregnation unit is set to 260°C. The K-type thermocouple measures the temperature in real time and feeds the temperature back to the temperature controller. After five minutes of heating, the entire impregnation unit reaches 260°C. The heating rod in the shaping unit is started to make the temperature of the shaping unit reach 260°C. The resin feeding mechanism is started, and the resin flows into the lower flow channel and reaches a molten state in the flow channel. The fiber dry filaments will be impregnated and prepared at the same time under the drive of the winding module. The resin will gradually flow to the shaping module under the drive of the fiber dry filaments. The nozzle of the shaping module will ensure that the wire diameter is 0.4mm, and the excess resin The grease will be scraped off and discharged from the overflow port. The blade is driven by the motor to move up and down continuously. When moving upward, the resin accumulated at the overflow port is shoveled off and attached to the blade. When the blade moves downward to the gap between the blades, the resin solidifies and is scraped off and falls into the silo, and moves upward again, repeating the process, thereby ensuring that the resin in the flow channel is continuously replaced, and obtaining continuous fiber-reinforced PA resin prepreg with better performance. The prepared prepreg is cured with resin, polished with a grinder and observed under an ultra-depth of field microscope. It can be seen that the fiber resin is evenly distributed in the prepreg prepared by the impregnation device, and the fiber resin is fully impregnated. At the same time, a stretching machine is used to test the performance of the prepreg, and the tensile strength of the wire reaches 600MPa.

[0029] The present invention provides an impregnation device, wherein the impregnation flow channel is composed of an ellipsoidal wave flow channel, and the shaping module has the function of automatically removing excess resin, thereby ultimately achieving high impregnation and high surface quality preparation of continuous fiber composite material prepreg.

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 (B13) moves upward, the resin is in a molten state; 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 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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