Direct-writing type continuous fiber prepreg yarn 3D printing spray head device

Abstract

The utility model provides a direct writing type continuous fiber prepreg filament 3D printing nozzle device which comprises a feeding machine, a continuous fiber prepreg filament guide tube, a temperature-resistant throat tube, a heat insulation block, a heating block and a high-temperature nozzle, the feeding machine is located at the topmost end of the continuous fiber prepreg filament 3D printing nozzle device, and the continuous fiber prepreg filament guide tube, the temperature-resistant throat tube and the heat insulation block are arranged below the feeding machine. The continuous fiber prepreg filament guide pipe is located under the feeding machine, the temperature-resistant throat pipe is located on the outer side of the prepreg filament guide pipe, the heat insulation block is located on the outer side of the temperature-resistant throat pipe, the heating block is located under the continuous fiber prepreg filament guide pipe, the temperature-resistant throat pipe and the heat insulation block, and the high-temperature spray head is located under the heating block. The continuous fiber reinforced thermoplastic resin matrix composite preimpregnated filament 3D printing device is modularized in design, compact in structure and convenient to replace, the problem that continuous fiber reinforced thermoplastic resin matrix composite preimpregnated filaments are insufficient in extrusion force is solved, and the FDM 3D printing problem of fiber reinforced resin matrix composites with high melting points is solved.

Description

Technical Field

[0001] This utility model relates to the field of additive manufacturing technology, and in particular to FDM 3D printing technology for prepreg filaments of continuous fiber-reinforced thermoplastic resin-based composite materials. Background Technology

[0002] Since the birth of the first commercial 3D printer at the end of the 20th century, countries around the world have successively developed additive manufacturing 3D printing equipment. Additive molding technologies mainly include FDM, SLA, SLS, LOM, etc. Among them, FDM is the most widely used additive manufacturing technology for thermoplastic resin materials.

[0003] Currently, the printing temperature of mainstream FDM printers in China is generally between 0℃ and 220℃. Some manufacturers have developed machines with a printing temperature of 0℃ to 250℃, but this molding temperature still cannot meet the molding temperature requirements of high-performance engineering plastics (such as PEEK with a molding temperature of 410℃ to 450℃), especially the printing temperature requirements of continuous fiber reinforced thermoplastic composite prepreg filaments.

[0004] China's additive manufacturing 3D printing technology is booming and has achieved considerable success. Currently, more and more universities and emerging technology companies in China are investing in additive manufacturing research, including dozens of institutions such as Tsinghua University, Shanghai Yuanzhu, Dongguan Yimai, Beijing Institute of Technology, and Harbin Institute of Technology. The application fields are also becoming increasingly broad. However, to date, dedicated printing equipment for high-performance continuous fiber reinforced thermoplastic composite prepreg filaments is still under development, and no mature equipment has yet been launched. The core of mature FDM equipment lies in the design and optimization of the nozzle. Therefore, there is an urgent need to develop a 3D printing nozzle suitable for high-performance continuous fiber composite prepreg filaments. Utility Model Content

[0005] In view of this, in order to overcome the above-mentioned technical deficiencies, the purpose of this utility model is to provide a direct-write continuous fiber prepreg filament 3D printing nozzle device, which can solve the problem of continuous printing of high-temperature continuous fiber reinforced resin matrix composite prepreg filaments, especially solving the problems of insufficient extrusion force, easy nozzle clogging, easy filament breakage when printing continuous fiber prepreg filaments (filament diameter 0.5mm, 1.0mm, etc.), as well as the printing problem of high-temperature composite material filaments.

[0006] To achieve the above objectives, the main technical solution adopted by this utility model is as follows: a direct-write continuous fiber prepreg 3D printing nozzle device, including a feeder, a continuous fiber prepreg guide tube, a heat-resistant throat tube, a heat insulation block, a heating block, and a high-temperature nozzle.

[0007] Furthermore, the feeder is located at the top of the continuous fiber prepreg 3D printing nozzle device and is the power unit of the feeding system. The feeding rate can be adjusted according to the specifications of the prepreg. Below it are continuous fiber prepreg guide tubes, heat-resistant throats, and heat insulation blocks. The apertures of the continuous fiber prepreg guide tubes and heat-resistant throats can be replaced according to the diameter of the continuous fiber composite prepreg.

[0008] Furthermore, the continuous fiber prepreg guide tube is located directly below the feeder, which can correct the direction of the feeder's force, thereby improving problems such as filament bending and insufficient feed force during filament printing.

[0009] Furthermore, the heat-resistant throat is located outside the prepreg guide tube, and the heat insulation block is located outside the heat-resistant throat. The heat insulation block plays a role in heat dissipation and cooling, so that the continuous fiber composite prepreg filament inside the heat insulation block is in a non-molten state, so as to maintain the normal extrusion of the continuous fiber filament.

[0010] Furthermore, the heating block is located directly below the continuous fiber prepreg guide tube, the heat-resistant throat tube, and the heat insulation block, and has the ability to rapidly heat from 0°C to 500°C. It can determine the target temperature based on the optimal printing temperature of the continuous fiber reinforced resin-based composite prepreg and heat it rapidly, so that the continuous fiber prepreg within the heating block range is in a molten state.

[0011] Furthermore, the high-temperature nozzle is located directly below the heating block and is synchronously heated to the optimal printing temperature by the heating block to maintain the optimal molten state of the continuous fiber reinforced thermoplastic composite prepreg filament. It is the execution end of the direct-write continuous fiber prepreg 3D printing nozzle device. Attached Figure Description

[0012] Figure 1 Schematic diagram of a direct-write continuous fiber 3D printing nozzle device

[0013] Markings in the diagram: 1. Feeder; 2. Continuous fiber prepreg guide tube; 3. Heat-resistant throat; 4. Insulation block; 5. Heating block; 6. High-temperature nozzle; 7. Continuous fiber prepreg. Detailed Implementation

[0014] To better explain and facilitate understanding of this utility model, it will be described below with reference to the accompanying drawings and specific embodiments.

[0015] The following specific embodiments provide a clearer, more complete, and more detailed explanation of the technical solution of this utility model. These embodiments are the preferred embodiments based on the technical solution of this utility model, but the scope of protection of this utility model is not limited to the following embodiments.

[0016] A direct-write continuous fiber prepreg 3D printing nozzle device, such as Figure 1As shown, it includes a feeder 1, a continuous fiber prepreg guide tube 2, a heat-resistant throat tube 3, a heat insulation block 4, a heating block 5, and a high-temperature nozzle 6.

[0017] Furthermore, the feeder 1 is located at the top of the continuous fiber prepreg 3D printing nozzle device and is the power unit of the feeding system. The feeding rate can be adjusted according to the specifications of the prepreg. Below it are the continuous fiber prepreg guide tube 2, the heat-resistant throat tube 3, and the heat insulation block 4. The aperture of the continuous fiber prepreg guide tube 2 and the heat-resistant throat tube 3 can be changed according to the diameter of the continuous fiber composite prepreg.

[0018] Furthermore, the continuous fiber prepreg guide tube 2 is located directly below the feeder 1, which can correct the direction of the force applied by the feeder 1, thereby improving problems such as filament bending and insufficient feeding force during filament printing.

[0019] Furthermore, the heat-resistant throat tube 3 is located outside the prepreg guide tube 2, and the heat insulation block 4 is located outside the heat-resistant throat tube 3. The heat insulation block 4 plays a role in heat dissipation and cooling, so that the continuous fiber composite prepreg filament inside the heat insulation block 4 is in a non-molten state, so as to maintain the normal extrusion of the continuous fiber filament.

[0020] Furthermore, the heating block 5 is located directly below the continuous fiber prepreg guide tube 2, the heat-resistant throat tube 3, and the heat insulation block 4. It has the ability to rapidly heat from 0°C to 500°C. It can determine the target temperature according to the optimal printing temperature of the continuous fiber reinforced resin-based composite prepreg and heat it rapidly, so that the continuous fiber prepreg within the range of the heating block 5 is in a molten state.

[0021] Furthermore, the high-temperature nozzle 6 is located directly below the heating block 5. It is simultaneously heated to the optimal printing temperature by the heating block 5 to maintain the optimal molten state of the continuous fiber reinforced thermoplastic composite prepreg filament. It is the execution end of the direct-write continuous fiber prepreg filament 3D printing nozzle device.

[0022] In summary, the 0.5mm continuous fiber reinforced composite prepreg filament 7 enters the continuous fiber prepreg filament guide tube 2, the heat-resistant throat tube 3, and the heat insulation block 4 under the action of the feeder 1. The heat-resistant throat tube 3 has a large aperture, and the thin and soft 0.5mm continuous fiber prepreg filament 7 is prone to bending at the heat-resistant throat tube 3 under the action of the feeder 1, resulting in insufficient vertical extrusion force and failure to complete the continuous printing of composite prepreg filament. However, the continuous printing of 0.5mm continuous fiber prepreg filament can be completed through the corrective action of the continuous fiber prepreg filament guide tube 2.

[0023] The present invention relates to a direct-write continuous fiber prepreg filament 3D printing nozzle device, which adopts a modular design, is easy to replace, and can solve the problem of continuous printing of high-temperature continuous fiber reinforced resin matrix composite prepreg filaments. In particular, it solves the problems of insufficient extrusion force, easy nozzle clogging, and easy filament breakage when printing continuous fiber prepreg filaments (filament diameter 0.5mm, 1.0mm, etc.), as well as the printing problem of high-temperature composite material filaments.

[0024] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the corresponding claims.

[0025] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A direct-write continuous fiber prepreg filament 3D printing nozzle apparatus, characterized by: It comprises a feeder (1), a continuous fiber prepreg filament guide tube (2), a temperature-resistant throat pipe (3), a heat insulation block (4), a heating block (5) and a high-temperature nozzle (6).

2. A direct-write continuous fiber tows preimpregnated filament 3D printing head device according to claim 1, characterized in that, The feeder (1) is located at the top of the continuous fiber prepreg filament 3D printing nozzle device and is the power device of the feeding system.

3. The direct-write continuous fiber tows preimpregnated filament 3D printing head device of claim 1, wherein, The continuous fiber prepreg filament guide tube (2) is located directly below the feeder (1) and can correct the force direction of the feeder (1).

4. The direct-write continuous fiber tows preimpregnated filament 3D printing head device of claim 1, wherein, The temperature-resistant throat pipe (3) is located outside the prepreg filament guide tube (2), and the heat insulation block (4) is located outside the temperature-resistant throat pipe (3).

5. The direct-write continuous fiber tows preimpregnated filament 3D printing head device of claim 1, wherein, The heating block (5) is located directly below the continuous fiber prepreg filament guide tube (2), the temperature-resistant throat pipe (3) and the heat insulation block (4) and can be rapidly heated to 500℃.

6. The direct-write continuous fiber tows preimpregnated filament 3D printing head device of claim 1, wherein, The high-temperature nozzle (6) is located directly below the heating block (5) and is the execution end of the direct-writing continuous fiber prepreg filament 3D printing nozzle device.

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