3D printing device based on filamentous mixed material

Abstract

The invention relates to the technical field of 3D printing, in particular to a 3D printing device based on a filamentous mixed material, which comprises a wire outlet mechanism, a relaxation mechanism, a printing mechanism and a printing table, filaments are output from the filament outlet mechanism, sequentially pass through the relaxation mechanism and the printing mechanism and are mixed with colloid in the printing mechanism to form a filiform mixed material, and the filiform mixed material is printed on the printing table. The filament discharging mechanism is used for outputting filaments according to a first preset parameter; the relaxation mechanism is used for tensioning or loosening passing filaments; the printing mechanism is used for mixing the passed filaments and the colloid to form a filament-shaped mixed material and printing the filament-shaped mixed material on the printing table according to a second preset parameter; the problems existing in various existing 3D printing technologies are solved at low cost, the quality of finished products is higher, and the application range is wider.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, in particular to a 3D printing device based on filamentary mixed materials. Background Art

[0002] The current 3D printing technologies mainly include photocuring, fused deposition, powder sintering, inkjet, etc. Among them: photocuring is to use ultraviolet light beams to solidify liquid resin into the desired shape; fused deposition is to heat the material to the melting point and extrude it layer by layer through a nozzle to form the desired shape; powder sintering is to gradually build objects by sintering powder materials through inkjet or laser. These 3D printing technologies have their own characteristics and can meet different needs and application scenarios, but they all have certain defects. For example, photocuring is only applicable to specific types of resins that can be photocured, and the material selection is relatively limited; fused deposition is to extrude layer by layer through a nozzle after heating to the melting point, and the interlayer adhesion may be limited, affecting the mechanical properties of the constructed object; powder sintering may have surface roughness or sintering marks during the sintering process; the resolution of inkjet is relatively limited, and it is difficult to meet some applications with extremely high precision requirements.

[0003] Therefore, at the current stage, 3D printing technology lacks a 3D printing technology with a wide range of applications, low cost and high quality of finished products; based on this, using a filamentary mixed material composed of a metal wire and a colloid composite for 3D printing can eliminate the defects of the above printing technology, wherein: relative to melt deposition, the filamentary mixed material composed of a metal wire and a colloid composite has better fluidity, the colloid is in more complete contact with the printing table and between the colloids, the metal wire is easier to fix, and the interlayer adhesion ability is stronger during cooling, so the mechanical properties of the constructed object are better; relative to powder sintering, the filamentary mixed material composed of a metal wire and a colloid composite is uniformly coated on the metal wire by the colloid, and has better fluidity and mutual fusion during the solidification molding process on the printing layer, which can reduce surface roughness; relative to inkjet, the filamentary mixed material composed of a metal wire and a colloid composite delivers a single filamentary mixed material through a single port of the print head, and the position of the print head and the wire feeding time are precisely adjusted by a computer, thereby improving the positioning accuracy, thereby having a higher printing resolution.

[0004] In summary, the field of 3D printing technology is in urgent need of a 3D printing device based on filamentary mixed materials, which can achieve low-cost mixing of filaments and colloids and perform 3D printing, with higher quality of finished products and adaptability to more application environments. Summary of the invention

[0005] In view of the above-mentioned defects, the purpose of the present invention is to propose a 3D printing device based on filamentary mixed materials, which solves the problems existing in various existing 3D printing technologies at a low cost, and has higher quality of finished products and a wider range of applications.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A 3D printing device based on filamentary mixed materials, comprising a filament outlet mechanism, a tensioning mechanism, a printing mechanism and a printing table; the filamentary material is output from the filament outlet mechanism, passes through the tensioning mechanism and the printing mechanism in sequence, and is mixed with colloid in the printing mechanism to form a filamentary mixed material, which is printed on the printing table;

[0008] The wire output mechanism is used to output the filament according to a first preset parameter;

[0009] The tensioning and relaxing mechanism is used to tension or relax the filament passing through;

[0010] The printing mechanism is used for mixing the passing filament with the colloid to form the filament mixed material, and printing the filament mixed material on the printing table according to the second preset parameters.

[0011] Further, the tensioning mechanism includes a tensioning portion and a guiding portion; the guiding portion is used to guide the filament output from the tensioning mechanism to the printing mechanism;

[0012] The wire outlet mechanism, the tensioning portion, the guide portion, the printing mechanism and the printing platform are arranged in sequence from top to bottom, and the guide portion is arranged directly above the wire inlet of the printing mechanism.

[0013] Furthermore, a first guide and a second guide are provided inside the tensioning portion from top to bottom, a tensioning guide is provided between the first guide and the second guide, and the first guide and the second guide are both offset from the tensioning guide;

[0014] When the tensioning portion is tensioned, the filament passes through the first guide member, the tensioning guide member and the second guide member in sequence;

[0015] When the tensioning portion is relaxed, the filament passes through the first guide member and the second guide member in sequence.

[0016] Furthermore, the printing mechanism includes a material storage part, a printing part and a segment cutting part; the wire outlet channel inside the printing part is provided with at least one material feeding channel communicating with the material storage part, and the segment cutting part is arranged at the outlet of the wire outlet channel;

[0017] The storage part is used to store the colloid;

[0018] The printing unit is used to output the filamentary mixed material according to the second preset parameter and print it on the printing table;

[0019] The shearing section is used for shearing the filamentous mixed material.

[0020] Furthermore, an air inlet and an air outlet are provided inside the tension and relaxation portion; an air flow path from the air inlet to the air outlet passes between the first guide member and the second guide member;

[0021] The tensioning guide has a telescopic function; when in working state, the tensioning guide extends out to limit the filament blown up by the airflow; when in non-working state, the tensioning guide retracts and does not contact the filament.

[0022] Furthermore, the tensioning portion is further provided with a tensioning detector; the tensioning detector is arranged on a side of the tensioning guide member facing the air outlet, or is arranged directly below the guide portion;

[0023] When the filament contacts the tensioning detector, the tensioning guide extends, otherwise the tensioning guide retracts.

[0024] Furthermore, the feed channel is provided with a metering component and a switch component.

[0025] Furthermore, the feed channel is connected to the wire outlet channel from the inlet to the outlet of the wire outlet channel, and the feed channel is larger as it is closer to the inlet of the wire outlet channel.

[0026] Furthermore, the diameter of the wire outlet channel gradually decreases from the inlet to the outlet, and a stopper is provided at the outlet of the wire outlet channel.

[0027] Furthermore, a heating device is provided at the outlet of the filament outlet channel, and the heating device is used to solidify the filamentous mixed material printed on the printing table.

[0028] The technical solution provided by the present invention may include the following beneficial effects: when in working state, the filament output mechanism is driven to output the filament according to the first preset parameter, and then the filament passes through the tensioning mechanism and the printing mechanism in sequence; before printing, the colloid is first mixed in the printing mechanism to form a filamentary mixed material. Compared with the prefabricated filamentary mixed material, the filamentary mixed material can be effectively prevented from solidifying or deforming in the mixed form on the way, resulting in poor printing effect; when printing, the filament passing through the tensioning mechanism is tensioned by the tensioning mechanism, which is conducive to the accurate length of the filament transmitted to the printing mechanism and the filamentary mixed material printed out from the printing mechanism, thereby improving the printing effect. At the same time, the printing mechanism accurately controls the printing mechanism to print the filamentary mixed material on the printing table according to the printing steps according to the second preset parameter and the first preset parameter, so as to form the required plane pattern or three-dimensional model; and after printing or in non-working state, all mechanisms stop working, and the tensioning mechanism relaxes the filament passing through to avoid the filament from being broken due to long-term tension; thereby using fewer mechanism components, low-cost mixing of filaments and colloids and 3D printing are achieved, the finished product quality is higher, and it is suitable for more application environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a 3D printing device based on filamentary mixed materials according to one embodiment of the present invention.

[0030] Figure 2 Yes Figure 1 Schematic diagram of the tensioning mechanism shown Figure 1 .

[0031] Figure 3 Yes Figure 1 Schematic diagram of the tensioning mechanism shown Figure 2 .

[0032] Figure 4 Yes Figure 1 Schematic diagram of the partial structure of the printing mechanism shown.

[0033] Among them: wire outlet mechanism 1, tensioning mechanism 2, printing mechanism 3, printing table 4, filament 5, tensioning portion 21, guide portion 22, first guide member 211, second guide member 212, tensioning guide member 213, material storage portion 31, printing portion 32, cutting portion 33, wire outlet channel 321, material feeding channel 322, air inlet 214, air outlet 215, tensioning detector 216, metering member 323, switch member 324, block 325, heating device 326. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features, and are used to distinguish and describe features, without distinction of order or importance.

[0036] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0037] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0038] Combine the following Figures 1 to 4 , describing a 3D printing device based on filamentary mixed materials according to an embodiment of the present invention.

[0039] A 3D printing device based on filamentary mixed materials comprises a filament outlet mechanism 1, a tensioning mechanism 2, a printing mechanism 3 and a printing table 4; a filamentary material 5 is output from the filament outlet mechanism 1, passes through the tensioning mechanism 2 and the printing mechanism 3 in sequence, and is mixed with colloid in the printing mechanism 3 to form a filamentary mixed material, which is printed on the printing table 4;

[0040] The wire output mechanism 1 is used to output the filament 5 according to the first preset parameters;

[0041] The tensioning mechanism 2 is used to tension or relax the filament 5 passing through;

[0042] The printing mechanism 3 is used for mixing the passing filament 5 with the colloid to form a filament mixed material, and printing the filament mixed material on the printing table 4 according to the second preset parameters.

[0043] The present invention proposes a preferred embodiment of a 3D printing device based on filamentary mixed materials, such as Figure 1As shown, in the working state, the wire-discharging mechanism 1 (such as a coil wound with a filament 5 controlled by a motor) is driven to output the filament 5 according to a first preset parameter (such as the output speed of the filament 5, which can be driven by a control device), and then the filament 5 passes through the tensioning mechanism 2 and the printing mechanism 3 in sequence; before printing, the colloid is first mixed in the printing mechanism 3 to form a filamentary mixed material, which can effectively avoid the filamentary mixed material from solidifying or deforming in the mixed form on the way compared to the prefabricated filamentary mixed material, resulting in a poor printing effect; during printing, the filament 5 passing through is tensioned by the tensioning mechanism 2, which is conducive to the accuracy of the length of the filament 5 transmitted to the printing mechanism 3 and the filamentary mixed material printed out from the printing mechanism 3, thereby improving the printing effect. At the same time, the printing mechanism 3 is adjusted according to the second The preset parameters (such as the output speed of the filament mixed material, the inclination angle of the filament outlet of the printing mechanism 3, etc., which can be driven by the control device) cooperate with the first preset parameters to accurately control the printing mechanism 3 to print the filament mixed material on the printing table 4 according to the printing steps (which can be one-time molding or multiple cycles of molding according to the above-mentioned control principle, which can be driven by the control device) to form the required plane pattern or three-dimensional model; and after printing or in the non-working state, all mechanisms stop working, and the tensioning mechanism 2 relaxes the filament 5 passing through to avoid the filament 5 from breaking due to long-term tension; thereby using fewer mechanism components, and achieving low-cost mixing of the filament 5 and the colloid and 3D printing, with higher quality of the finished product and adapting to more application environments.

[0044] It should be noted that the colloid components can be a polymer resin matrix, an organic solvent, metal conductive particles or additives, etc. By changing the components, the colloid can have different properties, such as strong viscosity, conductivity, etc. The filament 5 can be various filaments, such as plastic wire, metal wire, etc., and the material is not limited. For example, the metal wire can be composed of gold, silver, copper, aluminum, titanium, stainless steel and alloys, etc., and has a wide range of applications.

[0045] Furthermore, the tensioning mechanism 2 includes a tensioning portion 21 and a guiding portion 22; the guiding portion 22 is used to guide the filament 5 output from the tensioning mechanism 2 to the printing mechanism 3;

[0046] The wire outlet mechanism 1 , the tensioning portion 21 , the guide portion 22 , the printing mechanism 3 and the printing platform 4 are arranged in sequence from top to bottom, and the guide portion 22 is arranged just above the wire inlet of the printing mechanism 3 .

[0047] In the present embodiment, in order to enable the filament 5 to remain in a relaxed state throughout the entire process when not in operation and to avoid deformation or breakage due to long-term tension, for example, when all components are arranged horizontally, it is necessary to pass through multiple mechanism components. Because of the relationship between the guide components, the thread 5 will always be subjected to tension, and it is difficult to thread the thread 5, and many components are required; therefore, the wire-discharging mechanism 1, the tensioning portion 21, the guide portion 22, the printing mechanism 3 and the printing table 4 are arranged in sequence from top to bottom. After the filament 5 is output from the wire-discharging mechanism 1, it is guided by gravity to pass through the tensioning portion 21, the guide portion 22 and the printing mechanism 3, and the threading is simple. After the tensioning portion 21 relaxes the filament 5 passing through, the filament 5 is in a natural state (without tension) and will not break or deform. In addition, each mechanism reduces a large number of guide components, with a simple structure and lower cost.

[0048] Furthermore, in order to meet the needs of various application environments, the printing mechanism 3 may need to be rotatable so that the filamentary mixed material can be printed out at different angles. Therefore, if there is no guide portion 22 between the tensioning mechanism 2 and the printing mechanism 3, the printing mechanism 3 will pull the output wire of the tensioning mechanism 2 during the rotation process, which may cause the risk of breakage. Therefore, the guide portion 22 is arranged between the tensioning mechanism 2 and the printing mechanism 3, and is arranged directly above the wire inlet of the printing mechanism 3 to play a role of buffering the introduction.

[0049] It should be noted that the guide portion 22 can be a roller, a circular slider, etc., so that the filament 5 can be smoothly guided to the filament inlet of the printing mechanism 3 through the guide portion 22.

[0050] Furthermore, a first guide 211 and a second guide 212 are provided inside the tensioning portion 21 from top to bottom, a tensioning guide 213 is provided between the first guide 211 and the second guide 212, and the first guide 211 and the second guide 212 are both offset from the tensioning guide 213;

[0051] When the tensioning portion 21 is tensioned, the filament 5 passes through the first guide 211, the tensioning guide 213 and the second guide 212 in sequence;

[0052] When the tensioning portion 21 is relaxed, the filament 5 passes through the first guide member 211 and the second guide member 212 in sequence.

[0053] In this embodiment, Figure 2As shown (the dotted line indicates the relaxed state), in order to guide the filament 5 in accordance with the gravity when it passes through, the tensioning portion 21 is internally provided with a first guide member 211 (such as a roller, a circular slider, etc.) and a second guide member 212 (such as a roller, a circular slider, etc.) from top to bottom. The filament 5 will not be subjected to any tension only when passing through the first guide member 211 and the second guide member 212, and only plays a guiding role; when a tensioning guide member 213 (such as a roller, a circular slider, etc.) is provided between the first guide member 211 and the second guide member 212, and the first guide member 211 and the second guide member 212 are both misaligned with the tensioning guide member 213, if the filament 5 passes through the first guide member 211, the tensioning guide member 213 and the second guide member 212, the misalignment will cause a tension force to be exerted on the filament 5, even if the filament 5 is tensioned; therefore, the tensioning and relaxing functions of the tensioning portion 21 can be achieved by controlling whether the filament 5 passes through the tensioning guide member 213.

[0054] Based on this, there are many ways to achieve the tensioning and relaxing functions of the tensioning portion 21. For example, a grabbing component can be used to grab the filament 5 to bypass the tensioning guide 213 during tensioning, and to grab the filament 5 to release the tensioning guide 213 during relaxation, thereby achieving switching between tensioning and relaxation. For example, the tensioning guide 213 can be set as a movable part to pick up the filament 5 during tensioning, and to release the filament 5 during relaxation.

[0055] Furthermore, the printing mechanism 3 includes a material storage portion 31, a printing portion 32 and a cutting portion 33; the wire outlet channel 321 inside the printing portion 32 is provided with at least one material feeding channel 322 communicating with the material storage portion 31, and the cutting portion 33 is arranged at the outlet of the wire outlet channel 321;

[0056] The storage part 31 is used for storing colloid;

[0057] The printing unit 32 is used to output the filamentary mixed material according to the second preset parameters and print it on the printing table 4;

[0058] The shearing section 33 is used to shear the filamentous mixed material.

[0059] In this embodiment, Figure 1 and 4 As shown, the printing mechanism 3 is provided with at least one feeding channel 322 in the wire outlet channel 321 inside the printing section 32, which is connected to the material storage section 31, so that when the filament 5 passes through the wire outlet channel 321, it is mixed with the colloid transmitted from the feeding channel 322 in the wire outlet channel 321 to form a filament mixed material, which is then printed out from the outlet of the printing section 32. For this purpose, the printing section 32 needs to be controlled by the second preset parameter, and finally a cutting section 33 needs to be set at the outlet of the wire outlet channel 321, which is used to cut the filament mixed material to enter the next cycle or end when the required plane pattern or three-dimensional model needs to be segmented, multiple cycles are completed or ended.

[0060] Furthermore, an air inlet 214 and an air outlet 215 are provided inside the tensioning portion 21; the air flow path from the air inlet 214 to the air outlet 215 passes between the first guide member 211 and the second guide member 212;

[0061] The tensioning guide 213 has a telescopic function; when in working state, the tensioning guide 213 extends out to limit the filament 5 blown up by the airflow; when in non-working state, the tensioning guide 213 retracts and does not contact the filament 5.

[0062] In this embodiment, if mechanical action is used to achieve the tensioning and relaxing functions of the tensioning portion 21, when the filament 5 is relatively thin, there is a risk of causing the filament 5 to break; therefore, the tensioning and relaxing functions of the tensioning portion 21 are achieved pneumatically. Specifically, an air inlet 214 and an air outlet 215 are further provided inside the tensioning portion 21, and the air flow path from the air inlet 214 to the air outlet 215 passes through the first guide member 211 and the second guide member 212, and a retractable tensioning guide 213 is used; thus, when the tensioning portion 21 is tensioned, air is blown from the air inlet 214 and discharged from the air outlet 215, and the air flow blows up the filament 5 located between the first guide member 211 and the second guide member 212, and then the tensioning guide 213 extends out to limit the filament 5 blown up by the air flow (that is, the filament 5 bypasses the tensioning guide 213), thereby forming a pulling force on the filament 5; and when the tensioning portion 21 is relaxed, regardless of whether the filament 5 is blown (generally, the blowing will stop), the tensioning guide 213 will retract and not contact the filament 5, and no pulling force will be formed on the filament 5.

[0063] Furthermore, the tensioning portion 21 is further provided with a tensioning detector 216; the tensioning detector 216 is arranged on a side of the tensioning guide 213 facing the air outlet 215, or is arranged directly below the guide portion 22;

[0064] When the filament 5 contacts the tensioning detector 216, the tensioning guide 213 extends, otherwise the tensioning guide 213 retracts.

[0065] In this embodiment, Figures 2 to 3 As shown, in order to be able to promptly drive the tensioning guide 213 to extend the limited filament 5 to complete tensioning after the filament 5 is blown into place, thereby improving printing efficiency, the tensioning portion 21 is also provided with a tensioning detector 216, which is arranged on the side of the tensioning guide 213 facing the air outlet 215. When the filament 5 is blown into contact with the tensioning detector 216, it means that the tensioning guide 213 is extended at this time, allowing the filament 5 to bypass the tensioning guide 213; or the tensioning detector 216 can be arranged directly below the guide portion 22, because when the filament 5 is pneumatically in place, the filament 5 guided by the guide portion 22 is actually in a pre-tensioned state, which can be used as a detection position.

[0066] Furthermore, the feed channel 322 is provided with a metering member 323 and a switch member 324 .

[0067] In this embodiment, in order to control the mixing amount of the colloid in the filamentous mixed material, a metering component 323 (such as a flow meter, etc.) and a switch component 324 (such as a ball valve, solenoid valve, etc.) can be provided in the feed channel 322 to control the glue output amount and glue output speed (can be manually controlled, and the equipment can be controlled in linkage).

[0068] Furthermore, the feed channel 322 is connected to the wire outlet channel 321 from the inlet to the outlet of the wire outlet channel 321, and the feed channel 322 is larger as it is closer to the inlet of the wire outlet channel 321.

[0069] In this embodiment, when the number of feed channels 322 is large, it is preferred that the inlet and outlet of the wire outlet channel 321 are respectively connected to the wire outlet channel 321 to form a multi-stage glue outlet channel. The feed channels 322 near the inlet can be selected as large channels and gradually reduced, so that the filament 5 can be fully soaked in the colloid to form a filamentary mixed material as soon as it enters the wire outlet channel 321, and then the secondary wire outlet channel 321 is used as a colloid supplement. The closer to the outlet of the wire outlet channel 321, the less the need for glue supplement. In order to make the colloid mix more evenly with the filament 5, the feed channels 322 can be further symmetrically arranged on the peripheral side of the wire outlet channel 321.

[0070] Furthermore, the diameter of the wire outlet channel 321 gradually decreases from the inlet to the outlet, and a stopper 325 is provided at the outlet of the wire outlet channel 321 .

[0071] In this embodiment, the diameter of the wire outlet channel 321 gradually decreases from the inlet to the outlet, which can guide, shape and compress the filamentary mixed material, so that the colloid and the filament can be fully integrated in the process of passing through the wire outlet channel 321, and a stopper 325 is set at the outlet of the wire outlet channel 321 to complete the final shaping of the filamentary mixed material and scrape off excess colloid. Preferably, the thickness of the colloid finally wrapped on the surface of the filament is 0.2-0.8mm.

[0072] Furthermore, a heating device 326 is provided at the outlet of the filament outlet channel 321 , and the heating device 326 is used to solidify the filamentary mixed material printed on the printing table 4 .

[0073] In this embodiment, a heating device 326 is provided at the outlet of the filament outlet channel 321, which can heat the filamentary mixed material printed on the printing table 4 after the filamentary mixed material is printed out, quickly solidify it, improve the printing quality, and avoid the overflow of the colloid causing a poor printing effect.

[0074] Other structures and operations of a 3D printing device based on filamentous mixed materials according to an embodiment of the present invention are known to ordinary technicians in the field and will not be described in detail here.

[0075] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0076] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A 3D printing device based on filamentary mixed materials, characterized in that: It includes a wire-discharging mechanism, a tensioning mechanism, a printing mechanism and a printing table; the filament is output from the wire-discharging mechanism, passes through the tensioning mechanism and the printing mechanism in sequence, and is mixed with colloid in the printing mechanism to form a filamentary mixed material, which is printed on the printing table; The wire output mechanism is used to output the filament according to a first preset parameter; The tensioning and relaxing mechanism is used to tension or relax the filament passing through; The printing mechanism is used for mixing the passing filament with the colloid to form the filament mixed material, and printing the filament mixed material on the printing table according to the second preset parameters.

2. A 3D printing device based on filamentary mixed materials according to claim 1, characterized in that: The tensioning mechanism comprises a tensioning portion and a guiding portion; the guiding portion is used to guide the filament output from the tensioning mechanism to the printing mechanism; The wire outlet mechanism, the tensioning portion, the guide portion, the printing mechanism and the printing platform are arranged in sequence from top to bottom, and the guide portion is arranged directly above the wire inlet of the printing mechanism.

3. A 3D printing device based on filamentary mixed materials according to claim 2, characterized in that: A first guide and a second guide are provided inside the tensioning portion from top to bottom, a tensioning guide is provided between the first guide and the second guide, and the first guide and the second guide are both offset from the tensioning guide; When the tensioning portion is tensioned, the filament passes through the first guide member, the tensioning guide member and the second guide member in sequence; When the tensioning portion is relaxed, the filament passes through the first guide member and the second guide member in sequence.

4. A 3D printing device based on filamentary mixed materials according to claim 1, characterized in that: The printing mechanism comprises a material storage part, a printing part and a segment cutting part; the wire outlet channel inside the printing part is provided with at least one material feeding channel communicating with the material storage part, and the segment cutting part is arranged at the outlet of the wire outlet channel; The storage part is used to store the colloid; The printing unit is used to output the filamentous mixed material according to the second preset parameter and print it on the printing table; The shearing section is used for shearing the filamentous mixed material.

5. A 3D printing device based on filamentary mixed materials according to claim 3, characterized in that: The tension and relaxation portion is further provided with an air inlet and an air outlet; an air flow path from the air inlet to the air outlet passes between the first guide member and the second guide member; The tensioning guide has a telescopic function; when in working state, the tensioning guide extends out to limit the filament blown up by the airflow; when in non-working state, the tensioning guide retracts and does not contact the filament.

6. A 3D printing device based on filamentary mixed materials according to claim 5, characterized in that: The tensioning portion is further provided with a tensioning detector; the tensioning detector is arranged on a side of the tensioning guide member facing the air outlet, or is arranged directly below the guide portion; When the filament contacts the tensioning detector, the tensioning guide extends, otherwise the tensioning guide retracts.

7. A 3D printing device based on filamentary mixed materials according to claim 4, characterized in that: The material supply channel is provided with a metering component and a switch component.

8. A 3D printing device based on filamentary mixed materials according to claim 4, characterized in that: The feed channel is connected to the wire outlet channel from the inlet to the outlet of the wire outlet channel, and the feed channel is larger as it is closer to the inlet of the wire outlet channel.

9. A 3D printing device based on filamentary mixed materials according to claim 4, characterized in that: The diameter of the wire outlet channel gradually decreases from the inlet to the outlet, and a stopper is provided at the outlet of the wire outlet channel.

10. The 3D printing device based on filamentary mixed materials according to claim 4, characterized in that: A heating device is also provided at the outlet of the filament outlet channel, and the heating device is used to solidify the filamentous mixed material printed on the printing table.

Images