Reverse recovery device for 3D printing fiber composite material

Abstract

The invention relates to a 3D printing fiber composite material reverse recovery device, recovered materials are used for preparing fiber prepreg filaments, the device is provided with a rack, and a stripping unit is arranged on one side of the rack and can lead out a mixture of continuous fibers and thermoplastic resin; the mixture enters a shaping unit arranged on one side of the stripping unit to be melted and compounded again, and then after the mixture passes through a guiding unit, fiber prepreg filaments with good surface quality are drawn out; and finally, the fiber prepreg filaments enter a winding unit to be wound. According to the device, the whole recovery preparation is realized through operations such as three-time stripping of a mixture of continuous fibers and thermoplastic resin, two-time shaping of a fiber prepreg filament shaping unit, size online detection, active traction of recovered fiber prepreg filaments, rolling and the like of a recovered workpiece under the action of a temperature field.

Description

Technical Field

[0001] The invention relates to a 3D printing fiber composite material reverse recycling device, wherein the recycled material is used to prepare fiber prepreg yarns, and belongs to the technical field of 3D printing fiber composite material recycling. Background Art

[0002] Continuous fiber reinforced polymer (CFRP) composites are widely used in the automotive, aircraft and aerospace fields due to their excellent comprehensive properties such as light weight, high specific stiffness and strength. The recycling and reuse technology of composite materials is the key to realizing the sustainable and low-carbon circular economy development of the composite materials industry. At present, the recycling methods of thermoplastic composites have certain advantages over thermosetting composites in terms of cost, performance and secondary utilization. In particular, the combination with the 3D printing process is expected to further enhance the recycling and reuse value of thermoplastic composites. However, for continuous fiber reinforced thermoplastic composites, the fiber shearing and damage caused by physical crushing during recycling are often inevitable, and only long fiber or short fiber composites can be obtained, which can no longer be used to form original products. Therefore, with the continuous increase in the use of thermoplastic composites, the development of corresponding recycling and reuse technologies is becoming more and more important for promoting the long-term development of composite materials. How to avoid physical crushing and directly realize the recycling of continuous fibers in the recycling process of continuous fiber reinforced thermoplastic composites will become one of the main challenges.

[0003] In recent years of space exploration, fiber-reinforced composite materials have attracted attention due to their advantages of light weight and high strength. Compared with the ground environment, the recycling and reuse of space materials can reduce the logistics costs in the process of raw material replenishment, reduce the logistics footprint of human operations in space, and reduce the risk of space mission exploration, which is of great significance for future deep space exploration. In 2018, the International Space Station developed and operated the "refabricator" equipment for the recycling and reuse of thermoplastic Ultem 9085 (PEI / PC) materials. However, there is currently no research on the on-orbit recycling and reuse technology of continuous fiber-reinforced composite materials. Due to the particularity of the space environment, the recycling and reuse processes and equipment of traditional thermoplastic polymers and their composites may face problems such as space limitations, vibration interference, noise, debris, environmental pollution, and performance degradation when used in the space environment. Therefore, it is necessary to develop recycling and reuse processes and equipment suitable for space constraint environments to achieve miniaturization, lightweight, low power consumption, etc. of equipment, and ensure the safety and efficiency of the process. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies and needs of the above-mentioned prior art, the present invention proposes a 3D printing fiber composite material reverse recycling device, and the recycled materials are used to prepare fiber prepregs. The device aims at the problems existing in the prior art, such as low manufacturing efficiency, poor stability of the manufacturing process, poor surface quality of the recycled and prepared fiber prepregs, large dimensional fluctuations, serious damage to the rolled-up fiber prepregs, and irregular arrangement of the wire windings. The device sequentially performs the operations of three-stripping of the mixture of continuous fiber and thermoplastic resin under the action of the temperature field, shaping of the two fiber prepreg shaping units, online size detection, active traction and winding of the recycled fiber prepregs, etc., to achieve the entire recycling preparation. The fiber prepreg products recycled and prepared by the device have good surface quality and small dimensional fluctuations, and the rolled-up fiber prepregs are not damaged, and the wire windings are arranged neatly, which meets the needs of 3D printing.

[0006] (II) Technical solution

[0007] A 3D printed fiber composite material reverse recycling device, the recycled material is used to prepare fiber prepreg yarn, the device has a frame, a stripping unit is arranged on one side of the frame, and can lead out a mixture of continuous fiber and thermoplastic resin; the mixture enters a shaping unit arranged on one side of the stripping unit for re-melting and compounding, and then after passing through a guide unit, the fiber prepreg yarn with good surface quality is pulled out; finally, the fiber prepreg yarn enters a winding unit for winding; the stripping unit, the shaping unit, the guide unit and the winding unit are fixed on the frame in a roughly ring-shaped shape.

[0008] The stripping unit comprises an infrared heating unit for providing a temperature field, a rotating unit for realizing a stripping rotation action, a hood unit and a driving unit; the infrared heating unit and the rotating unit are fixedly connected to the left and right sides of the upper part of the hood unit respectively, and the driving unit is arranged inside the hood unit; after the driving unit transports the workpiece to be processed to the infrared heating unit, it heats and strips out a mixture of continuous fibers and thermoplastic resin, and the mixture is rotated at a certain speed against the 3D printing molding direction via the rotating unit and outputted to the shaping unit.

[0009] In the infrared heating unit, the rear heat insulation cover and the front heat insulation cover are buckled together, a fixed panel is fixed on the rear heat insulation cover, a fixing part with a temperature sensor is provided on the fixed panel, the infrared heating tube is fixed to the fixing part, and a slider seat is fixedly connected to the lower end of the front heat insulation cover, the slider seat slides on the first slide rail, and the first slide rail is fixed to the cover plate.

[0010] In the driving unit, a driving reduction stepper motor is connected to one side of a driving motor fixing plate. After the motor shaft of the driving reduction stepper motor passes through the driving motor fixing plate, it is connected to a synchronous pulley. The synchronous pulley adapts to the movement of the synchronous belt and the tail fixing piece. The synchronous belt is clamped between the synchronous belt tooth plate and the synchronous belt pressure plate. A synchronous belt tooth plate fixing plate is fixedly connected to the synchronous belt tooth plate. A fixing seat is fixedly connected to the synchronous belt tooth plate fixing plate, and the fixing seat is fixedly connected to the slider seat; the transverse slide rail is adapted to the transverse slider seat; a limit switch fixing seat is arranged on the tail fixing piece, a limit switch is arranged on the limit switch fixing seat, and the limit switch is synchronized with the slider seat; a pull plate and a first adjustment shaft assembly and a second adjustment shaft assembly are arranged on the limit switch fixing seat; the rear cover plate is fixed to the cover plate.

[0011] The shaping unit includes in sequence: a first shaping unit for remelting and compounding the recycled fiber and the thermoplastic resin to obtain a preliminary fiber prepreg; a tension adjustment unit for adjusting the tension of the preliminary fiber prepreg; a guiding unit for guiding the preliminary fiber prepreg; a second shaping unit for obtaining the fiber prepreg with good surface quality; a size detection unit for ensuring the size of the product; and an active traction unit with a soft rubber roller to avoid surface damage.

[0012] In the first shaping unit, the shaping sliding seat can slide on the shaping slide rail fixed on the shaping fixed seat; the shaping cover plate covers the shaping fixed seat, and the shaping cover plate is sequentially provided with a shaping guide long axis, a shaping short axis fixing plate, and a shaping guide short axis from top to bottom; a gasket, a single-head heating rod with a temperature sensor, a heating block, and a heating block shaping die are provided at the end of the shaping guide short axis, and the heating block is tightened and fixed by hand screws; the mixture enters from the shaping guide long axis, passes through the shaping guide short axis, and is heated and exported.

[0013] In the tensioning force adjustment unit, a pair of pre-tightening shaft fixing seats are arranged on the pre-tightening shaft fixing seat slide rail, and a first soft rubber roller and a rubber ring are passed through and fixed on one of the pre-tightening shaft fixing seats through a pre-tightening shaft; a second soft rubber roller is passed through and fixed on the other pre-tightening shaft fixing seat through a pre-tightening pressing shaft; a tension sensor is fixed on the side of the pre-tightening pressing shaft through a sensor fixing seat; an adjusting shaft assembly is pressed against the sensor fixing seat to adjust it; there is also a tension display installed on the tension display mounting plate; the hybrid passes between the two soft rubber rollers.

[0014] In the second shaping unit, a single-head heating rod with a temperature sensor installed is fixedly connected to the mold mounting plate through a heat insulation plate, and the shaping upper mold and the shaping lower mold are adapted in pairs for the mixture to pass through, and are installed on the single-head heating rod.

[0015] In the active traction unit, the traction reduction stepper motor is passed through and fixed on the traction motor fixing seat, driving the active soft rubber roller on the active wheel fixing shaft to rotate; the active soft rubber roller and the passive soft rubber roller are arranged opposite to each other to allow the hybrid to pass through; the passive soft rubber roller is passed through the passive wheel fixing shaft and fixed to the passive wheel fixing seat; the passive wheel fixing assembly is fixedly connected to the passive wheel fixing seat, and a passive wheel compression spring fixing shaft is provided in the middle, and each side of the passive wheel compression spring has a set of sleeved springs sleeved on the passive wheel sliding shaft to jointly press against the compression spring pressure plate; the threaded part fixes the traction cover plate on the passive wheel fixing assembly to keep the sleeved spring and the compression spring pressure plate in a compressed state.

[0016] In the winding unit, the mixture first passes through a winding tensioning unit that provides a certain tensioning force for the mixture, and then passes through a winding unit to be wound tightly, neatly, flatly and without deformation.

[0017] (III) Beneficial effects

[0018] A 3D printing fiber composite material reverse recycling device of the present invention, the recycled materials are used to prepare fiber prepregs, and the recycled materials are used to prepare fiber prepregs. The device aims at the problems existing in the prior art such as low manufacturing efficiency, poor stability of the manufacturing process, poor surface quality of the recycled and prepared fiber prepregs, large dimensional fluctuations, serious damage to the rolled-up fiber prepregs, and irregular arrangement of the wire windings. The device sequentially realizes the entire recycling preparation by three-stripping of a mixture of continuous fiber and thermoplastic resin under the action of a temperature field, shaping of two fiber prepreg shaping units, online size detection, active traction of the recycled fiber prepregs, and winding operations. The fiber prepreg products recycled and prepared by the device have good surface quality and small dimensional fluctuations, and the rolled-up fiber prepregs are free of damage, and the wire windings are arranged neatly, meeting the needs of 3D printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a 3D printed fiber composite material reverse recycling device;

[0020] Figure 2 This is a schematic diagram of the structure of independent module units of a 3D printed fiber composite material reverse recycling device;

[0021] Figure 3 It is a schematic diagram of the structure of the fiber stripping unit for recycling workpieces;

[0022] Figure 4 It is a structural schematic diagram of the first fiber prepreg shaping unit;

[0023] Figure 5 It is a structural schematic diagram of a fiber prepreg tension adjustment unit;

[0024] Figure 6It is a structural schematic diagram of a fiber prepreg shaping guide unit;

[0025] Figure 7 It is a structural schematic diagram of the second fiber prepreg shaping unit;

[0026] Figure 8 It is a structural schematic diagram of a fiber prepreg size detection unit;

[0027] Fig. 9 It is a structural schematic diagram of a fiber prepreg active traction unit;

[0028] Fig.10 It is a structural schematic diagram of a fiber prepreg winding and tensioning unit;

[0029] Fig.11 It is a schematic diagram of the structure of the fiber prepreg winding unit. DETAILED DESCRIPTION

[0030] See also Figure 1 The present invention discloses a reverse recycling device for 3D printed fiber composite materials, wherein the recycled materials are used to prepare fiber prepreg yarns. The device comprises a frame 1, and a stripping unit 2 is arranged on one side of the frame 1, which can draw out a mixture 3 of continuous fibers and thermoplastic resins; the mixture 3 enters a shaping unit 4 arranged on one side of the stripping unit 2 for re-melting and compounding, and then, after passing through a guide unit 5, a fiber prepreg yarn 6 with good surface quality is drawn out; finally, the fiber prepreg yarn 6 enters a winding unit 7 for winding; the stripping unit 2, the shaping unit 4, the guide unit 5 and the winding unit 7 are fixed on the frame 1 in a roughly annular shape.

[0031] See also Figure 2-3 The stripping unit 2 includes an infrared heating unit for providing a temperature field, a rotating unit for realizing a stripping rotation action, a hood unit and a driving unit; the left and right sides of the upper part of the hood unit are respectively fixedly connected with the infrared heating unit and the rotating unit, and the driving unit is arranged inside the hood unit; after the driving unit transports the workpiece 2-6 to be processed to the infrared heating unit, it heats and strips out a mixture 3 of continuous fibers and thermoplastic resin, and the mixture 3 is rotated at a certain speed against the 3D printing molding direction through the rotating unit, and is output to the shaping unit 4.

[0032] The hood unit is fixed on the frame 1, and includes an upper cover plate 2-12, a front cover plate 2-15, and a rear cover plate 2-32, which are combined into one.

[0033] In the infrared heating unit, the rear heat insulation cover 2-1 and the front heat insulation cover 2-5 are buckled together, a fixed panel 2-2 is fixed on the rear heat insulation cover 2-1, a fixing part 2-3 with a temperature sensor is provided on the fixed panel 2-2, the infrared heating tube 2-4 is fixed to the fixing part 2-3, and a slider seat 2-10 is fixedly connected to the lower end of the front heat insulation cover 2-5, the slider seat 2-10 slides on the first slide rail 2-11, and the first slide rail 2-11 is fixed on the cover plate 2-12.

[0034] In the rotating unit, a right-angle reduction stepping motor 2-9 is fixed on the motor fixing part 2-8, and a workpiece clamping part 2-7 is connected to the output shaft of the right-angle reduction stepping motor 2-9.

[0035] In the driving unit, a driving motor fixing plate 2-16 is connected to a driving reduction stepping motor 2-13 on one side. After the motor shaft 2-17 of the driving reduction stepping motor 2-13 passes through the driving motor fixing plate 2-16, it is connected to a synchronous pulley 2-18. The synchronous pulley 2-18 is adapted to move with a synchronous belt 2-19 and a tail fixing member 2-25. The synchronous belt 2-19 is clamped between a synchronous belt tooth plate 2-23 and a synchronous belt pressure plate 2-24. A synchronous belt tooth plate fixing plate 2-22 is fixedly connected to the synchronous belt tooth plate 2-23. The synchronous belt tooth plate fixing plate 2-2 2 is fixedly connected to a fixing seat 2-21, and the fixing seat 2-21 is fixedly connected to the slider seat 2-10; the transverse slide rail 2-14 is adapted to the transverse slider seat 2-10; a limit switch fixing seat 2-27 is arranged on the tail fixing member 2-25, and a limit switch 2-28 is arranged on the limit switch fixing seat 2-27, and the limit switch 2-28 is synchronized with the slider seat 2-10; a pull plate 2-29 and a first adjusting shaft assembly 2-30 and a second adjusting shaft assembly 2-31 are arranged on the limit switch fixing seat 2-27; a rear cover plate 2-32 is fixed to the cover plate 2-31.

[0036] See also Figure 2 The shaping unit 4 includes in sequence: a first shaping unit 4-1 for remelting and compounding the recycled fiber with the thermoplastic resin to obtain a preliminary fiber prepreg 6; a tension adjustment unit 4-2 for adjusting the tension of the preliminary fiber prepreg 6; a guiding unit 4-3 for guiding the preliminary fiber prepreg 6; a second shaping unit 4-4 for obtaining the fiber prepreg 6 with good surface quality; a size detection unit 4-5 for ensuring the size of the product; and an active traction unit 4-6 with a soft rubber roller to avoid surface damage.

[0037] See also Figure 4In the first shaping unit 4-1, the shaping sliding seat 4-1-11 can slide on the shaping slide rail 4-1-2 fixed on the shaping fixed seat 4-1-1; the shaping cover plate 4-1-3 covers the shaping fixed seat 4-1-1, and the shaping cover plate 4-1-3 is sequentially provided with a shaping guide long axis 4-1-4, a shaping short axis fixing plate 4-1-5, and a shaping guide short axis 4-1-6 from top to bottom, and a gasket 4-1-7, a single-head heating rod 4-1-8 with a temperature sensor, a heating block 4-1-9, and a heating block shaping die 4-1-10 are provided at the end of the shaping guide short axis 4-1-6, and the heating block 4-1-9 is tightened and fixed by a hand screw 4-1-12;; the mixed body 3 enters from the shaping guide long axis 4-1-4, passes through the shaping guide short axis 4-1-6 and is heated and exported.

[0038] See also Figure 5 In the tensioning force adjustment unit 4-2, a pair of pre-tightening shaft fixing seats 4-2-3 are arranged on the pre-tightening shaft fixing seat slide rail 4-2-1, on one of the pre-tightening shaft fixing seats, the first soft rubber roller 4-2-4 and the rubber ring 4-2-2 are passed through and fixed thereon via the pre-tightening shaft 4-2-5; on the other pre-tightening shaft fixing seat, the second soft rubber roller is passed through and fixed thereon via the pre-tightening clamping shaft 4-2-6; a tension sensor 4-2-7 is fixed on the side of the pre-tightening clamping shaft 4-2-6 via a sensor fixing seat 4-2-8; an adjusting shaft assembly 4-2-9 is pressed against the sensor fixing seat 4-2-8 to adjust it; there is also a tension display 4-2-10 installed on the tension display mounting plate 4-2-11; the hybrid 3 passes between the two soft rubber rollers.

[0039] See also Figure 6 In the guide unit 4-3, the shaping guide shaft fixing seat 4-3-1 is fixed on the frame 1, and the shaping short shaft 4-3-2 is arranged in the middle of the shaping guide shaft fixing seat 4-3-1 for the mixing body 3 to pass through.

[0040] See also Figure 7 In the second shaping unit 4-4, a single-head heating rod 4-4-4 with a temperature sensor is fixedly connected to the mold mounting plate 4-4-6 through a heat insulation plate 4-4-5, and a shaping upper mold 4-4-1 and a shaping lower mold 4-4-2 are adapted in pairs for the mixture 3 to pass through, and are installed on the single-head heating rod 4-4-4.

[0041] See also Figure 8 In the size detection unit 4-5, the size detection jig 4-5-2 is fixed on the frame 1 through the jig fixing seat 4-5-1, and the hybrid 3 passes through the size detection jig 4-5-2.

[0042] See also Fig. 9In the active traction unit 4-6, the traction reduction stepping motor 4-6-13 is passed through and fixed to the traction motor fixing seat 4-6-12, driving the active soft rubber roller on the active wheel fixing shaft 4-6-9 to rotate; the active soft rubber roller and the passive soft rubber roller 4-6-10 are arranged opposite to each other for the hybrid 3 to pass through; the passive soft rubber roller 4-6-10 is passed through the passive wheel fixing shaft 4-6-8 and fixed to the passive wheel fixing seat 4-6-7; the passive wheel fixing assembly 4-6-11 is fixedly connected to the passive wheel fixing seat 4-6-7, and has a passive wheel compression spring fixing shaft 4-6-6 in the middle, and has a set of set springs 4-6-4 on both sides of the passive wheel sliding shaft 4-6-3 to jointly press the compression spring pressure plate 4-6-5; the threaded member 4-6-2 fixes the traction cover plate 4-6-1 to the passive wheel fixing assembly 4-6-11 to keep the set spring 4-6-4 and the compression spring pressure plate 4-6-5 in a compressed state.

[0043] See also Figure 2 In the winding unit 7, the mixture 3 first passes through the winding tensioning unit 7-1 which provides a certain tension force therefor, and then passes through the winding unit 7-2 to be tightly, neatly, flatly and without deformation.

[0044] See also Fig.10 In the winding and tensioning unit 7-1, a winding guide assembly is respectively arranged at the front and the back, and the winding guide assembly respectively includes a tensioning beam 7-1-1, a pair of tensioning frames 7-1-10 and a pair of winding and tensioning long shafts 7-1-11. The tensioning beam 7-1-1 is fixed to the upper end of the tensioning frame 7-1-10 and presses against the corresponding winding and tensioning long shaft 7-1-11; a tensioning assembly passing through the pre-tightening bracket 7-1-4 is arranged in the middle position of the winding and tensioning unit 7-1; a small guide wheel 7-1-9 is arranged on the front side of the tensioning assembly, and a first deep groove ball bearing 7-1-2 which is relatively arranged and sleeved on the first bearing fixed shaft 7-1-3 and a second deep groove ball bearing 7-1-8 which is sleeved on the second bearing fixed shaft 7-1-5 are arranged on the middle side, and a small spring 7-1-6 which is sleeved on the small spring fixed shaft 7-1-7 is arranged on the rear side.

[0045] See also Fig.11 In the winding unit 7-2, the mixture 3 first passes through the winding guide assembly that moves back and forth left and right, and then the winding reduction stepper motor on the winding motor bracket drives the workpiece reel to rotate, thereby realizing the final winding of the strip.

Claims

1. A 3D printed fiber composite material reverse recycling device, the recycled material is used to prepare fiber prepreg, characterized in that: The device comprises a frame, a stripping unit is arranged at one side of the frame, and can draw out a mixture of continuous fiber and thermoplastic resin; the mixture enters a shaping unit arranged at one side of the stripping unit for re-melting and compounding, and then after passing through a guide unit, a fiber prepreg with good surface quality is drawn out; finally, the fiber prepreg enters a winding unit for winding; the stripping unit, the shaping unit, the guide unit and the winding unit are fixed on the frame in a roughly ring-shaped shape.

2. The 3D printed fiber composite material reverse recycling device according to claim 1, characterized in that: The stripping unit comprises an infrared heating unit for providing a temperature field, a rotating unit for realizing a stripping rotation action, a hood unit and a driving unit; the infrared heating unit and the rotating unit are fixedly connected to the left and right sides of the upper part of the hood unit respectively, and the driving unit is arranged inside the hood unit; after the driving unit transports the workpiece to be processed to the infrared heating unit, it heats and strips out a mixture of continuous fibers and thermoplastic resin, and the mixture is rotated at a certain speed against the 3D printing molding direction via the rotating unit and outputted to the shaping unit.

3. The 3D printed fiber composite material reverse recycling device according to claim 2, characterized in that: In the infrared heating unit, the rear heat insulation cover and the front heat insulation cover are buckled together, a fixed panel is fixed on the rear heat insulation cover, a fixing part with a temperature sensor is provided on the fixed panel, the infrared heating tube is fixed to the fixing part, and a slider seat is fixedly connected to the lower end of the front heat insulation cover, the slider seat slides on the first slide rail, and the first slide rail is fixed to the cover plate.

4. The 3D printed fiber composite material reverse recycling device according to claim 3, characterized in that: In the driving unit, a driving reduction stepper motor is connected to one side of a driving motor fixing plate. After the motor shaft of the driving reduction stepper motor passes through the driving motor fixing plate, it is connected to a synchronous pulley. The synchronous pulley adapts to the movement of the synchronous belt and the tail fixing piece. The synchronous belt is clamped between the synchronous belt tooth plate and the synchronous belt pressure plate. A synchronous belt tooth plate fixing plate is fixedly connected to the synchronous belt tooth plate. A fixing seat is fixedly connected to the synchronous belt tooth plate fixing plate, and the fixing seat is fixedly connected to the slider seat; the transverse slide rail is adapted to the transverse slider seat; a limit switch fixing seat is arranged on the tail fixing piece, a limit switch is arranged on the limit switch fixing seat, and the limit switch is synchronized with the slider seat; a pull plate and a first adjustment shaft assembly and a second adjustment shaft assembly are arranged on the limit switch fixing seat; the rear cover plate is fixed to the cover plate.

5. The 3D printed fiber composite material reverse recycling device according to claim 4, characterized in that: The shaping unit includes in sequence: a first shaping unit for remelting and compounding the recycled fiber and the thermoplastic resin to obtain a preliminary fiber prepreg; a tension adjustment unit for adjusting the tension of the preliminary fiber prepreg; a guiding unit for guiding the preliminary fiber prepreg; a second shaping unit for obtaining the fiber prepreg with good surface quality; a size detection unit for ensuring the size of the product; and an active traction unit with a soft rubber roller to avoid surface damage.

6. The 3D printed fiber composite material reverse recycling device according to claim 5, characterized in that: In the first shaping unit, the shaping sliding seat can slide on the shaping slide rail fixed on the shaping fixed seat; The shaping cover plate covers the shaping fixing seat, and the shaping cover plate is provided with a shaping guide long axis, a shaping short axis fixing plate, and a shaping guide short axis in sequence from top to bottom. A gasket, a single-head heating rod equipped with a temperature sensor, a heating block, and a heating block shaping die are provided at the end of the shaping guide short axis. The heating block is tightened and fixed by hand screws; the mixture enters from the shaping guide long axis, passes through the shaping guide short axis, and is heated and exported.

7. The 3D printed fiber composite material reverse recycling device according to claim 6, characterized in that: In the tensioning force adjustment unit, a pair of pre-tightening shaft fixing seats are arranged on the pre-tightening shaft fixing seat slide rail, and a first soft rubber roller and a rubber ring are passed through and fixed on one of the pre-tightening shaft fixing seats through a pre-tightening shaft; a second soft rubber roller is passed through and fixed on the other pre-tightening shaft fixing seat through a pre-tightening pressing shaft; a tension sensor is fixed on the side of the pre-tightening pressing shaft through a sensor fixing seat; an adjusting shaft assembly is pressed against the sensor fixing seat to adjust it; there is also a tension display installed on the tension display mounting plate; the hybrid passes between the two soft rubber rollers.

8. The 3D printed fiber composite material reverse recycling device according to claim 7, characterized in that: In the second shaping unit, a single-head heating rod with a temperature sensor installed is fixedly connected to the mold mounting plate through a heat insulation plate, and the shaping upper mold and the shaping lower mold are adapted in pairs for the mixture to pass through, and are installed on the single-head heating rod.

9. The 3D printed fiber composite material reverse recycling device according to claim 8, characterized in that: In the active traction unit, the traction reduction stepper motor is passed through and fixed on the traction motor fixing seat, driving the active soft rubber roller on the active wheel fixing shaft to rotate; the active soft rubber roller and the passive soft rubber roller are arranged opposite to each other to allow the hybrid to pass through; the passive soft rubber roller is passed through the passive wheel fixing shaft and fixed to the passive wheel fixing seat; the passive wheel fixing assembly is fixedly connected to the passive wheel fixing seat, and a passive wheel compression spring fixing shaft is provided in the middle, and each side of the passive wheel compression spring has a set of sleeved springs sleeved on the passive wheel sliding shaft to jointly press against the compression spring pressure plate; the threaded part fixes the traction cover plate on the passive wheel fixing assembly to keep the sleeved spring and the compression spring pressure plate in a compressed state.

10. The 3D printed fiber composite material reverse recycling device according to claim 9, characterized in that: In the winding unit, the mixture first passes through a winding tensioning unit that provides a certain tensioning force therefor, and then passes through a winding unit to be wound tightly, neatly, flatly and without deformation.

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