3D printing filament synthesis device, 3D printing filament coloring device, 3D printing tool head and 3D printing apparatus

Abstract

Provided in the present application are a 3D printing filament synthesis device, a 3D printing filament coloring device, a 3D printing tool head and a 3D printing apparatus. The 3D printing filament synthesis device comprises a bending mechanism and an additional material mechanism, wherein the additional material mechanism is configured to form a material layer on the surface of a strip-shaped consumable, and the bending mechanism is configured to bend or wind the strip-shaped consumable and the material layer in a direction perpendicular to the direction of length of the strip-shaped consumable, such that at least a portion of the material layer is wrapped by the strip-shaped consumable to form a columnar consumable. By adjusting the manner in which consumables are processed, the technical solution of the present application can realize the output of consumables having different colors or properties, such that multiple different consumables can be used during the same printing process to adapt to more usage scenarios.

Description

3D printing filament assembly device, 3D printing filament coloring device, 3D printing tool head and 3D printing equipment Technical Field

[0001] This application relates to the field of consumables processing, and in particular to a 3D printing filament synthesis device, a 3D printing filament coloring device, a 3D printing tool head, and a 3D printing equipment. Background Technology

[0002] Currently, 3D (Three-Dimensional) printing equipment can use various consumables with different properties to print models for different purposes. Each consumable is loaded into a separate printing head, and the printing head needs to be replaced when changing consumables, thus printing models with multiple consumables. However, because 3D printing heads are expensive, this method cannot be widely used in actual production. How to 3D print models with multiple consumables while controlling costs remains a pressing problem to be solved.

[0003] Summary of the Invention

[0004] The embodiments of this application provide a 3D printing filament synthesis device, a 3D printing filament coloring device, a 3D printing tool head, and a 3D printing equipment. By adjusting the processing method of the consumables, it is possible to output consumables of different colors or properties, so that multiple different consumables can be used in the same printing process to adapt to more application scenarios.

[0005] In a first aspect, this application provides a 3D printing filament assembly device, which includes a bending mechanism and an additional material assembly mechanism:

[0006] The 3D printing filament assembly device includes a bending mechanism and an additional material assembly mechanism:

[0007] [Correction 14.11.2025 according to Rule 91] The additional material mechanism is used to form a material layer on the surface of the strip consumable, and the bending mechanism is used to bend or wrap the strip consumable and the material layer along a direction perpendicular to the length of the strip consumable, so that at least a portion of the material layer is covered by the strip consumable to form a columnar consumable.

[0008] In this embodiment, the material application mechanism can directly spray pigments or functional materials onto the strip-shaped filament, thereby giving the filament a material layer. This allows the filament's properties or color to be changed in real time while the 3D printing equipment is in operation. Furthermore, because the material application mechanism can be precisely controlled by the electronic control system, the changes in the filament's properties are entirely controllable. During the 3D printing process, the filament's properties can be changed instantly to adapt to the molding requirements of the printed model.

[0009] In one possible implementation, the bending mechanism has a through hole for bending or winding the strip consumable and the material layer inward, wherein the diameter of the through hole gradually decreases or decreases in a stepwise manner in the direction of movement of the strip consumable.

[0010] In this embodiment, the bending mechanism can bend the strip-shaped consumable. When the strip-shaped consumable passes through the through hole, it can fit tightly against the hole wall, bringing the two edges of the strip-shaped consumable closer to each other. When the two edges come into contact and bond, the material layer is encapsulated inside the consumable, at which point the consumable is a cylindrical consumable.

[0011] As the cylindrical consumables pass through the bending and discharging mechanisms, the material layer is encased inside the consumables, preventing it from adhering to the bending or discharging mechanisms. This eliminates the need for extensive rinsing equipment to clean any remaining material inside the equipment, making the equipment more efficient and environmentally friendly.

[0012] In one possible implementation, the through hole is a conical hole, and the taper of the hole wall of the conical hole is between 45° and 60°.

[0013] In one possible implementation, the strip consumable has a preset printing melting temperature, the operating temperature of the bending mechanism is lower than the melting temperature of the preset nozzle, and the difference between the preset printing melting temperature and the operating temperature of the bending mechanism is 20℃-30℃.

[0014] In one possible implementation, the material of the strip consumable includes PLA, and the operating temperature range of the bending mechanism is between 150°C and 210°C.

[0015] In one possible implementation, the material of the strip consumable includes PETG, and the operating temperature range of the bending mechanism is between 200°C and 250°C.

[0016] In one possible implementation, the strip consumable is provided with a receiving groove, which is recessed on the surface of the strip consumable and extends or is arranged along the length of the strip consumable. The receiving groove is used to receive the material layer.

[0017] In one possible implementation, the strip consumable has a plurality of raised pleats, each of the raised pleats extending along the length of the strip consumable, and a receiving groove is formed between two adjacent raised pleats.

[0018] Alternatively, the strip consumable may have multiple indentations, each indentation extending along the length of the strip consumable, and the recessed space of each indentation forming the receiving groove.

[0019] In one possible implementation, the 3D printing filament synthesis apparatus further includes a receiving groove forming device located on the side of the additional material mechanism opposite to the bending mechanism. The receiving groove forming device is used to form a receiving groove on the surface of the strip consumable so that the strip consumable forms the material layer in the receiving groove when it passes through the additional material mechanism.

[0020] In one possible implementation, the ratio of the width to the thickness of the strip consumable is in the range of 9-240.

[0021] Secondly, this application provides a 3D printing filament coloring device, which includes a 3D printing filament synthesis device as described above and a driving mechanism. The driving mechanism is used to drive the strip consumable to move along the additional material mechanism toward the bending mechanism.

[0022] The additional material mechanism is used to form a material layer including pigment on the surface of the strip consumable, and the bending mechanism is used to cover at least a portion of the material layer with the strip consumable to form a colored columnar consumable.

[0023] In this embodiment, the color of the colored cylindrical filament can be changed by altering the color of the feeder for the ribbon filament. The colored cylindrical filament is continuously output from the printer's tool head, thus eliminating the need for multiple tool heads in the 3D printing equipment. This reduction in the number of tool heads in the 3D printing equipment leads to miniaturization, lower costs, and a simplified workflow, thereby enhancing its market competitiveness.

[0024] In addition, if the colored strip consumable does not completely cover the outer periphery of the material layer during the process of passing through the heating structure, a small amount of material layer will come into contact with the internal structure of the bending mechanism and / or the discharge mechanism. The residual pigment inside the mechanism can be removed by rinsing with a small amount of consumable, which is relatively easy to achieve in actual production.

[0025] In one possible implementation, the driving mechanism includes a feeding mechanism and an output mechanism. The 3D printing filament coloring device is provided with an infeed area and an output area. The feeding mechanism is located in the infeed area, the output mechanism is located in the output area, and the additional material mechanism and the bending mechanism are both located between the feeding mechanism and the output mechanism.

[0026] The feeding mechanism is used to transfer the strip consumable to the additional material mechanism, and the discharging mechanism is used to transport the colored columnar consumable to the outside of the 3D printing filament coloring device.

[0027] In one possible implementation, the material layer forms the inner core of the columnar consumable, and the strip consumable forms the outer layer of the colored columnar consumable, the outer layer covering the inner core.

[0028] In one possible implementation, the additional material mechanism includes a feeding component capable of adding pigments of different colors to the strip consumable.

[0029] In this embodiment, since the additional material mechanism includes multiple feeding parts of different colors, after multiple colors are sprayed onto the strip consumable, the colors can be mixed on the surface of the strip consumable to obtain a variety of colors, thereby producing a full-color consumable to enrich the colors of objects.

[0030] In one possible implementation, the additional material mechanism includes three feeding elements, the three feeding elements being magenta, cyan, and yellow, respectively.

[0031] In this embodiment, the three feeding components can individually spray pigment onto the strip consumable to prepare red, green, or yellow consumables. Alternatively, at least two of the three feeding components can simultaneously spray pigment onto the strip consumable, allowing the pigments to mix on the surface of the strip consumable to form consumables of multiple colors.

[0032] Furthermore, the color mixing process can be adjusted by regulating the pigment spraying speed of the three feeding components, thereby achieving controllability in the color mixing process and reducing the color difference between the material layer and the actual color required by the model. The pigment spraying speed of the feeding components can also be coordinated with the rotation speed of the feeding mechanism. Increasing the spraying speed allows for a corresponding increase in the rotation speed of the feeding mechanism, thus increasing the production efficiency of colored columnar consumables. When the required color saturation for colored columnar consumables is low, the rotation speed of the feeding mechanism can be appropriately increased to result in a thinner material layer on the strip consumables, thereby reducing the saturation of the colored columnar consumables and increasing their production efficiency. When the required color saturation for colored columnar consumables is high, the rotation speed of the feeding mechanism can be appropriately decreased to allow for a greater accumulation of material layer thickness on the strip consumables, increasing their color saturation. Alternatively, when the pigment spraying efficiency of the additional material mechanism decreases, the rotation speed of the feeding mechanism can be appropriately decreased to ensure that the material layer thickness on the strip consumables is not too thin, guaranteeing sufficient thickness for the strip consumables to develop color.

[0033] In one possible implementation, the additional material mechanism includes four feeding elements, the four feeding elements being magenta, cyan, yellow, and black, respectively.

[0034] In this embodiment, black pigment can also be used as a tool for adjusting colors in mixed-color printing. By adjusting the proportion of black pigment, the brightness and purity of the mixed colors can be changed, thereby obtaining richer and more delicate color effects. Black pigment has good opacity and light absorption properties, which can avoid light reflection, improve the overall appearance and texture of the printed object, and make the colors more saturated.

[0035] In one possible implementation, the feeding element has a pigment outlet spaced opposite to a surface of the strip consumable in the thickness direction, and the feeding element is used to spray pigment from the pigment outlet onto the strip consumable.

[0036] In one possible implementation, the feeding mechanism includes a first roller and a second roller, the first roller and the second roller being spaced apart, the gap between the first roller and the second roller being used for the strip consumable to pass through, and the feeding mechanism being used to smoothly transfer the strip consumable to the additional material mechanism.

[0037] In this embodiment, the first and second rollers can stably transport the colorless strip consumables. The roller clamping and transport employs a gentle clamping method, which can reduce damage to the strip consumables. Furthermore, because the rollers can move the strip consumables stably, the strip consumables are not easily affected by vibration or impact during transportation, thereby further protecting the integrity and quality of the strip consumables.

[0038] Furthermore, the distance between the first and second rollers can be adjusted to accommodate strip materials of varying thicknesses. This allows the feeding mechanism to flexibly handle the transfer needs of various strip materials, improving its adaptability and practicality.

[0039] In one possible implementation, the discharging mechanism includes a first pulling wheel and a second pulling wheel. The peripheral side of the first pulling wheel is connected to the peripheral side of the second pulling wheel. The peripheral side of the first pulling wheel is recessed with a first groove, and the peripheral side of the second pulling wheel is recessed with a second groove. The first groove and the second groove form a transmission channel for the colored columnar consumable to pass through.

[0040] In this embodiment, the cross-section of the transmission channel formed by the discharging mechanism can be circular. When the colored columnar consumable is output from the conical heating head, the temperature of the colored columnar consumable may be slightly high, at which point the colored columnar consumable is flexible. To prevent the colored columnar consumable from deforming and causing the internal pigment to leak out, the colored columnar consumable can be further shaped and cooled by the feeding roller, so that the consumable can better wrap the material layer.

[0041] In one possible implementation, the diameter of the columnar consumable ranges from 1.40 mm to 2.10 mm, and the thickness of the strip consumable ranges from 0.1 mm to 0.5 mm. When the strip consumable passes under the additional material mechanism, the strip consumable is arranged horizontally so that the pigment applied by the additional material mechanism can be evenly distributed on the surface of the strip consumable under the action of gravity.

[0042] Thirdly, this application provides a 3D printing tool head, including a hot end and a 3D printing filament coloring device as described in any one of claims 11-20, wherein the hot end is connected to the discharge mechanism of the 3D printing filament coloring device, and the columnar consumable output by the discharge mechanism is used to input the hot end, wherein the columnar consumable melts in the hot end and is extruded from the nozzle of the hot end.

[0043] Fourthly, this application provides a 3D printing device, including a printer and a 3D printing filament coloring device as described above, wherein a columnar consumable output from the discharge mechanism is used to input the printer.

[0044] In this embodiment, when the 3D printing equipment is in operation, it first acquires a 3D model. Then, slicing software converts the 3D model into instructions that the printer can understand. For example, the slicing software is used to set printing parameters such as printing speed, layer thickness, and infill density. The slicing software divides the 3D model into a series of thin layers and calculates the material and printing time required for each layer. The printer then begins printing according to the parameters set by the slicing software. The tool head precisely covers the worktable layer by layer according to the instructions. As each layer is stacked, the material rapidly cools and solidifies, forming a solid layer. This process is repeated multiple times until the entire object is completed.

[0045] When the 3D printing equipment is in operation, it minimizes the contact of ink with the internal components and directly applies colorless filament. By adjusting the filament's coloring method, different colors can be output, thus printing colored models. Changing filament colors does not require rinsing the inside of the 3D printing equipment with large amounts of filament or using multiple tool heads. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0047] Figure 1 is a schematic diagram of the structure of the 3D printing equipment provided in an embodiment of this application;

[0048] Figure 2 is a schematic diagram of the 3D printing filament coloring device shown in Figure 1;

[0049] Figure 3 is a schematic diagram of the bending mechanism shown in Figure 2;

[0050] Figure 4 is a cross-sectional view of the bending mechanism shown in Figure 3 at point AA;

[0051] Figure 5 is a schematic diagram of the structure of the colored columnar consumable shown in Figure 2;

[0052] Figure 6 is a schematic diagram of the discharge mechanism shown in Figure 2;

[0053] Figure 7 is a schematic diagram of another 3D printing filament coloring device provided in an embodiment of this application;

[0054] Figure 8 is a structural schematic diagram of another 3D printing filament coloring device provided in an embodiment of this application;

[0055] Figure 9 is a schematic diagram of another bending mechanism shown in Figure 1;

[0056] Figure 10 is a schematic diagram of the structure of a 3D printing tool head provided in an embodiment of this application. Detailed Implementation

[0057] For ease of understanding, the terminology used in the embodiments of this application will be explained first.

[0058] And / or: This is simply a way of describing the relationship between related objects. It indicates that there can be three kinds of relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0059] Multiple: refers to two or more.

[0060] Connection: should be interpreted broadly. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through an intermediary.

[0061] The specific embodiments of this application will now be clearly described in conjunction with the accompanying drawings.

[0062] Please refer to Figure 1, which is a schematic diagram of the structure of the 3D printing equipment 100 provided in an embodiment of this application. The 3D printing equipment 100 can construct objects by printing layer by layer using consumables such as powdered metal or plastic based on digital model files.

[0063] The 3D printing equipment 100 includes a 3D printing filament assembly device (not shown), a drive mechanism (not shown), and a printer 20. The 3D printing filament assembly device can modify the ribbon-shaped filament, thereby changing its color or properties. The drive mechanism is used to drive the ribbon-shaped filament to move within the 3D printing filament assembly device.

[0064] When the 3D printing equipment 100 is in operation, it first acquires a 3D model. Then, slicing software converts the 3D model into instructions that the printer 20 can understand. For example, the slicing software is used to set printing parameters such as printing speed, layer thickness, and infill density. The slicing software cuts the 3D model into a series of thin layers and calculates the material and printing time required for each layer. The printer 20 then begins printing according to the parameters set by the slicing software. The tool head precisely covers the worktable layer by layer according to the instructions. As each layer is stacked, the material rapidly cools and solidifies, forming a solid layer. This process is repeated multiple times until the entire object is completed.

[0065] Currently, in 3D (Three-Dimensional) printing equipment, only one type of filament can be used for each printed model. Using the same filament results in different areas of the printed model having the same properties and color, which is not suitable for a wider range of applications. Therefore, how to use filaments with different properties or colors in the same printing process is a problem that urgently needs to be solved.

[0066] For example, to print a color model, one method is to use multiple different colored filaments, each corresponding to a printing head. Changing the printing head requires changing the filament color. However, because 3D printing heads are expensive, this method is not widely used in actual production. Another method involves a thorough cleaning and rinsing process when a new color of filament is needed. This process removes the previous filament from the printing equipment using the new filament. However, this cleaning and rinsing process consumes a large amount of filament. Because the filament adhering to the inner wall of the nozzle or hot end is in a laminar flow state, the flow rate on the cavity wall is very low. Each time the filament is changed, a large amount of filament is needed to rinse away the residue of the previous color remaining on the inner wall of the molten cavity. The rinsing volume is several times the volume of the molten cavity, which is wasteful and environmentally unfriendly.

[0067] Therefore, how to 3D print color models while controlling costs remains an urgent problem to be solved.

[0068] Based on this, please refer to Figure 2, which is a structural schematic diagram of the 3D printing filament coloring device 10 shown in Figure 1. This application provides a 3D printing filament coloring device 10 that minimizes the contact of pigment with the nozzle or the interior of the hot end of the 3D printing equipment 100, and directly colors colorless filament. By adjusting the coloring method of the filament, different colors of filament can be output, thereby printing colored models. During the process of changing the filament color, there is no need to flush the interior of the 3D printing equipment 100 with a large amount of filament, nor is it necessary to use multiple tool heads.

[0069] The 3D printing filament coloring device 10 includes a 3D printing filament assembly device (not shown) and a drive mechanism (not shown). The 3D printing filament assembly device includes an additional material mechanism 13, a bending mechanism 14, and a delivery tube 15. The drive mechanism includes a feeding mechanism 11 and a discharging mechanism 12.

[0070] It should be noted that the 3D printing filament synthesis device can not only give the ribbon consumable 30 different colors, but also modify the ribbon consumable 30. When the filament synthesis device modifies the ribbon consumable 30, the 3D printing filament coloring device does not change the color of the ribbon consumable 30, but rather adjusts its properties. This application will only use the color change of the ribbon consumable 30 as an example below, but it should be understood that the modification process of the ribbon consumable 30 can be referred to as the coloring process of the ribbon consumable 30, and this application will not elaborate on the modification process of the ribbon consumable 30.

[0071] The feeding mechanism 11 is used to transfer colorless strip consumable 30 from outside the 3D printing filament coloring device 10 to the additive material mechanism 13. Specifically, the strip consumable 30 can be transparent or semi-transparent. The additive material mechanism 13 can color the colorless strip consumable 30 to form a colored cylindrical consumable 40. The bending mechanism 14 can bend or roll the colored strip consumable 30 to form a cylindrical consumable with a pigment core (colored cylindrical consumable 40). The discharging mechanism 12 is used to output the colored cylindrical consumable 40 to the outside of the 3D printing filament coloring device 10 through the delivery pipe 15. It should be noted that the shape of the colored cylindrical consumable 40 can also be different depending on the outlet shape of the bending mechanism 14, for example, it can be a cylindrical consumable 40 with a circular, triangular, or regular polygonal cross-section.

[0072] It should be noted that Figure 2 is only intended to schematically illustrate the connection relationship between the feeding mechanism 11, the discharging mechanism 12, the material attachment mechanism 13, the bending mechanism 14, and the conveying pipe 15, and is not intended to specifically limit the connection position, specific structure, or quantity of each device. Furthermore, the structure illustrated in the embodiments of this application does not constitute a specific limitation on the 3D printing filament coloring device 10. In other embodiments of this application, the 3D printing filament coloring device 10 includes more or fewer components than shown in Figure 2, or combines some components, or splits some components, or has different component arrangements. The components shown in Figure 2 can be implemented in hardware, software, or a combination of both.

[0073] The 3D printing filament coloring apparatus 10 includes an infeed area 101 and an outlet area 102. The infeed area 101 is the region where colorless strip-shaped filament 30 enters the 3D printing filament coloring apparatus 10. The outlet area 102 is the region where strip-shaped colored columnar filament 40 is transported to the outside of the 3D printing filament coloring apparatus 10. Exemplarily, the infeed area 101 and the outlet area 102 can be located at opposite ends along the length of the 3D printing filament coloring apparatus 10. Alternatively, the infeed area 101 and the outlet area 102 can be on the same side of the 3D printing filament coloring apparatus 10. After the filament enters the 3D printing filament coloring apparatus 10 from the infeed area 101, its conveying direction changes, and it is then output from the outlet area 102, which is located on the same side as the infeed area 101. This application embodiment provides a schematic illustration of the positions of the infeed area 101 and the outlet area 102. The feeding zone 101 can be understood as the initial end of the travel of the consumable in the 3D printing filament coloring device 10, and the discharging zone 102 can be understood as the end of the travel of the consumable in the 3D printing filament coloring device 10. This application does not limit the specific locations of the feeding zone 101 and the discharging zone 102.

[0074] When the 3D printing filament coloring device 10 is in operation, the 3D printing filament coloring device 10 has a strip-shaped consumable 30 inside.

[0075] The surface of the strip consumable 30 may have a receiving groove, which may be formed by folds in the strip consumable 30. The folds may extend along the length of the strip consumable 30. The raised parts of the folds may form the groove walls of the receiving groove, and the space between two adjacent folds may form the receiving groove. Alternatively, the receiving groove may be formed by an indentation on the surface of the strip consumable 30, with the indentation extending along the length of the strip consumable 30. The recessed space of the indentation forms the receiving groove. The width-to-thickness ratio of the strip consumable 30 is greater than or equal to 2. Specifically, the width-to-thickness ratio of the strip consumable 30 may range from 9 to 240 (inclusive of the endpoints 9 and 240).

[0076] For example, the 3D printing filament assembly apparatus may further include a groove forming device (not shown). The groove forming device is located before the material feeding mechanism 13 along the direction of movement of the filament strip. The groove forming device is used to form a groove on the surface of the filament strip 30, so that a material layer is formed within the groove as the filament strip 30 passes through the material feeding mechanism 13. For example, the groove forming device may include at least one embossing roller. The embossing roller rotates to form an indentation on the surface of the filament strip 30, and the indentation recess can form a groove.

[0077] In this embodiment, the receiving groove on the surface of the strip consumable 30 can be used to receive additional materials. For example, the additional materials can be materials that improve material performance or change color, such as adding fibers to improve the strength of the strip consumable 30, adding ink consumables to change the color of the strip consumable 30, adding flux to improve the flow properties of the strip consumable 30, adding adhesives to improve the adhesion properties of the strip consumable 30, or adding polar materials to make the strip material easy to peel off. Alternatively, a mixture of the above materials or a mixture of the above materials and the consumable can be added.

[0078] Furthermore, by adding an additional material layer to the surface of the strip consumable 30, the strip consumable 30 can be rolled back into a cylindrical shape. If the strip consumable 30 is too thick, it is difficult to roll it back into a cylindrical shape. If the strip consumable 30 is too thin, its structural strength is weak, making it difficult to feed in the equipment. Maintaining the width-to-thickness ratio of the strip consumable 30 within the range of 9-240 allows the strip consumable 30 to be smoothly rolled back into a cylinder and facilitates the transfer of consumables in the equipment.

[0079] For example, the material of the strip consumable 30 may include a plastic material. Specifically, the material of the strip consumable 30 may include a photosensitive resin. Photosensitive resin is one of the earliest materials used in 3D printing and is suitable for photopolymerization. The main component of photosensitive resin is a small molecule resin that can undergo a polymerization reaction, with added additives such as photoinitiators, polymerization inhibitors, and leveling agents. The photosensitive resin can undergo a polymerization reaction and achieve curing under specific light (generally ultraviolet light). Alternatively, the strip consumable 30 may be a thermoplastic. Thermoplastics are among the most common 3D printing materials. These include polylactic acid (PLA), polyethylene terephthalate (PET), polyethylene terephthalate-1,4-cyclohexanedimeth yleneterephthalate (PETG), acrylonitrile butadiene styrene (ABS), nylon (PA), polycarbonate (PC), polystyrene (PS), polycaprolactone (PCL), polyphenylene sulfone (PPSF), thermoplastic polyurethane (TPU), and polyether ether ketone (PEEK), among others. PLA is a biodegradable material that produces models with smooth surfaces, making it suitable for home and educational use. ABS, on the other hand, is better suited for creating strong and durable parts and has higher heat resistance. Alternatively, the strip filament 30 can be a PLA / PETG composite material. By using the polarity difference to reduce the adhesion of PLA and PETG, the support removal of the printed structure becomes more efficient, and the risk of damaging the printed model is reduced.

[0080] The feeding mechanism 11 is located in the feeding area 101. The feeding mechanism 11 includes a first roller 111 and a second roller 112, which are spaced apart. The gap between the first roller 111 and the second roller 112 allows the strip-shaped consumable 30 to pass through. For example, the first roller 111 and the second roller 112 can be cylinders with the same radial dimension. The central axes of the two cylinders can be parallel. When the feeding mechanism 11 is in operation, the first roller 111 and the second roller 112 rotate in opposite directions, and their rotation speeds can be the same. The rotation speeds of the first roller 111 and the second roller 112 can be adaptively set to suit the dyeing rate of the additional material mechanism 13. The method for adjusting the rotation speeds of the first roller 111 and the second roller 112 will be described in detail below.

[0081] In this embodiment, the first roller 111 and the second roller 112 can stably transport the colorless strip consumable 30. The roller clamping transport adopts a gentle clamping method, which can reduce damage to the strip consumable 30. In addition, since the rollers can move the strip consumable 30 stably, the strip consumable 30 is not easily affected by vibration or impact during transportation, thereby further protecting the integrity and quality of the strip consumable 30.

[0082] Furthermore, the distance between the first roller 111 and the second roller 112 can be adjusted to accommodate the thickness of the strip consumable 30, thus adapting to strip consumables 30 of different thicknesses. This allows the feeding mechanism 11 to flexibly meet the transmission needs of strip consumables 30 of various thicknesses, improving the adaptability and practicality of the feeding mechanism 11.

[0083] It should be noted that the feeding mechanism 11 shown in Figure 2 is only an illustrative representation of one transmission method for the strip consumable 30. The two ends of the first roller 111 and the second roller 112 along their length can be fixed to any frame. This application does not impose specific limitations on the installation method of the first roller 111 and the second roller 112. The first roller 111 and the second roller 112 can be installed using any of the existing roller installation methods.

[0084] The auxiliary material mechanism 13 is located between the feeding mechanism 11 and the discharging mechanism 12. This means that the strip consumable 30 first passes through the feeding mechanism 11, then through the auxiliary material mechanism 13, and then is transferred to the discharging mechanism 12. The auxiliary material mechanism 13 is located between the processing steps of the feeding mechanism 11 and the discharging mechanism 12, not that its spatial location is necessarily between them.

[0085] In some embodiments, the material feeding mechanism 13 includes a feeding unit (not shown) and a mixing unit (not shown). The feeding unit has a pigment outlet 131, which is spaced opposite to a surface of the strip consumable 30 in the thickness direction. The feeding unit is used to spray pigment from the pigment outlet 131 onto the strip consumable 30, thereby forming a material layer on the surface of the strip consumable 30. The feeding unit can perform the spraying under the control of an electronic control system. Specifically, the feeding unit can spray pigment onto the surface of the strip consumable 30 according to computer instructions, and the color of the sprayed pigment can be pre-generated by the mixing unit, for example, by mixing magenta, cyan, yellow, and black in different proportions, thereby outputting various colors.

[0086] In some embodiments, the material feeding mechanism 13 includes at least two feeders of different colors (not shown). Each feeder has a pigment outlet 131 spaced opposite a surface of the strip consumable 30 in the thickness direction. The feeder is used to spray pigment from the pigment outlet 131 onto the strip consumable 30, thereby forming a material layer on the surface of the strip consumable 30. The feeders can perform the spraying under the control of an electronic control system. Specifically, the feeders can spray pigment onto the surface of the strip consumable 30 according to computer instructions, and the amount of pigment sprayed can be adjusted according to the desired color.

[0087] In this embodiment, the additive material mechanism 13 can directly spray pigment onto the strip consumable 30, thereby giving the colorless strip consumable 30 a material layer. This allows the color of the consumable to be changed in real time while the 3D printing equipment 100 is in operation, achieving rapid color switching. Furthermore, since the additive material mechanism 13 can be precisely controlled by the electronic control system, the color change of the consumable is completely controllable. During the printing process of the 3D printing equipment 100, the color of the consumable can be changed instantly, thus directly printing colored items.

[0088] Since the additive material mechanism 13 contains multiple feeding parts of different colors, after multiple colors are sprayed onto the strip consumable 30, they can be mixed on the surface of the strip consumable 30 to obtain a variety of colors, thereby producing a full-color consumable to enrich the colors of objects.

[0089] In one possible implementation, the additional material mechanism 13 includes three feeding components. The three feeding components are magenta, cyan, and yellow, respectively. For example, the three feeding components may each contain magenta ink consumable, cyan ink consumable, and yellow ink consumable.

[0090] In this embodiment, the three feeding components can individually spray pigment onto the strip consumable 30 to prepare red, green, or yellow consumables. Alternatively, at least two of the three feeding components can simultaneously spray pigment onto the strip consumable 30, and the pigments can mix on the surface of the strip consumable 30 to form consumables of multiple colors.

[0091] Furthermore, the color mixing process can be adjusted by changing the pigment spraying speed of the three feeding components, thereby achieving controllability in the color mixing process and reducing the color difference between the material layer and the actual color required by the model. The pigment spraying speed of the feeding components can also be coordinated with the rotation speed of the feeding mechanism 11. Increasing the spraying speed can appropriately increase the rotation speed of the feeding mechanism 11, thereby increasing the production efficiency of the colored columnar consumable 40. When the required color saturation of the colored columnar consumable 40 is low, the rotation speed of the feeding mechanism 11 can also be appropriately increased to make the material layer thickness on the strip consumable 30 thinner, thus reducing the saturation of the colored columnar consumable 40 and increasing its production efficiency. When the required color saturation of the colored columnar consumable 40 is high, the rotation speed of the feeding mechanism 11 can be appropriately decreased to allow the material layer thickness of the strip consumable 30 to accumulate more, increasing the color saturation of the colored columnar consumable 40. Alternatively, when the pigment spraying efficiency of the additional material mechanism 13 decreases, the rotation speed of the feeding mechanism 11 can be appropriately reduced so that the thickness of the material layer on the strip consumable 30 is not too thin, ensuring that the thickness of the material layer is sufficient for the strip consumable 30 to develop color.

[0092] In another possible implementation, the material feeding mechanism 13 includes four feeding components, the colors of which are magenta, cyan, yellow and black, respectively.

[0093] In this embodiment, black pigment can also be used as a tool for adjusting colors in mixed-color printing. By adjusting the proportion of black pigment, the brightness and purity of the mixed colors can be changed, thereby obtaining richer and more delicate color effects. Black pigment has good opacity and light absorption properties, which can avoid light reflection, improve the overall appearance and texture of the printed object, and make the colors more saturated.

[0094] Please refer to Figures 2 and 3. Figure 3 is a schematic diagram of the bending mechanism 14 shown in Figure 2. The bending mechanism 14 is located between the material feeding mechanism 13 and the discharging mechanism 12. The bending mechanism 14 has a through hole 141 for bending the strip consumable 30 and the material layer inside. For example, the diameter of the through hole 141 can be between 0.6 mm and 3.0 mm (inclusive of the endpoint values ​​of 0.6 mm and 3.0 mm). In the direction from the material feeding mechanism 13 toward the discharging mechanism 12, the diameter of the through hole 141 gradually decreases or tapers. That is, the through hole 141 can be a hollow cavity with a gradually decreasing diameter of the bending mechanism 14. The bending mechanism 14 can be heated under the action of electric current or other conditions. When the strip consumable 30 passes through the bending mechanism 14, the strip consumable 30 softens and becomes flexible.

[0095] In one possible implementation, please refer to Figure 4, which is a cross-sectional view of the bending mechanism 14 shown in Figure 3 at point AA. The through hole 141 can be a tapered cavity, that is, the through hole 141 can be a conical hole. The taper α1 of the hole wall of the conical hole ranges from 45° to 60° (including the endpoint values ​​of 45° and 60°).

[0096] In this embodiment, if the taper is too small, the through-hole 141 will be very sharp, and the material will stay on the inner wall of the through-hole 141 for too long, resulting in overheating and excessive adhesion to the inner wall of the through-hole 141. If the taper is too large, the taper angle of the through-hole 141 will be a large obtuse angle, which will lead to insufficient heating of the consumable material, preventing it from reaching the appropriate temperature during high-speed printing. This will result in poor rewinding performance and the material being squeezed and broken apart by the pressure of the extrusion roller when it subsequently enters the printer.

[0097] The bending mechanism 14 operates under heating conditions, and its heating temperature can be 20°C-30°C lower than the melting temperature of the strip consumable 30. In this embodiment, the heating temperature of the bending mechanism 14 ensures that the outer surface of the consumable has a strong adhesive effect, allowing for adhesion and stitching during the winding and rewinding process. Simultaneously, the internal temperature of the consumable remains relatively low, still able to withstand the tension of the pulling rollers and preventing breakage.

[0098] The strip consumable 30 has a preset printing melting temperature, and the operating temperature of the bending mechanism 14 is lower than the preset nozzle melting temperature. The preset printing melting temperature is the operating temperature of the nozzle when the strip consumable 30 is output from the printer 20. The operating temperature of the bending mechanism 14 is the temperature at which the strip consumable 30 is bent or wound.

[0099] The difference between the preset printing melting temperature and the operating temperature of the bending mechanism 14 is 20℃-30℃. In one possible application scenario, the material of the strip consumable 30 includes PLA, and the operating temperature range of the bending mechanism 14 is between 150℃ and 210℃. In another possible application scenario, the material of the strip consumable 30 includes PETG, and the operating temperature range of the bending mechanism 14 is between 200℃ and 250℃. The preset printing melting temperature is the manufacturer-recommended or set melting temperature of the consumable at the hot end, which can be obtained through RFID or the manufacturer's instructions.

[0100] In another possible implementation, please refer to Figure 9, which is a structural schematic diagram of another bending mechanism 14 shown in Figure 1. In Figure 9, figure a is a structural schematic diagram of the bending mechanism 14 at one angle, figure b is a cross-sectional schematic diagram at point DD in figure a, figure c is a cross-sectional schematic diagram at point CC in figure a, and figure d is a cross-sectional schematic diagram at point BB in figure a.

[0101] The bending mechanism 14 can have a stepped variation. Specifically, the bending mechanism 14 includes a tube 142 and a core 143, with the core 143 connected inside the tube 142. Along the axial direction of the bending mechanism 14, that is, in the direction in which the consumable moves within the bending mechanism 14, the radial dimension of the core 143 gradually decreases. At the outlet of the bending mechanism 14, only the tube 142 structure exists, without the core 143 structure. The length of the core 143 is less than the length of the tube 142. Furthermore, along the axial direction of the bending mechanism 14, that is, in the direction in which the consumable moves within the bending mechanism 14, the connection area between the core 143 and the wall of the through hole 141 of the tube 142 gradually decreases.

[0102] In this embodiment, there is a certain gap between the inner wall of the core 143 and the inner wall of the tube 142. The strip consumable 30 can move gradually within the gap, gradually forming a ring shape as the gap widens. The strip consumable 30 adapts to the shape change of the gap and gradually bends. At the outlet of the bending mechanism 14, the strip consumable 30 can form a columnar consumable 40 for output. This step-changing gap setting makes the bending process of the strip consumable more controllable, improving the stability and quality of the output of the columnar consumable 40.

[0103] When the 3D printing filament coloring apparatus 10 is in operation, the colored ribbon filament 30 can be transported from the material attachment mechanism 13 to the bending mechanism 14. Referring to Figure 5, which is a structural schematic diagram of the colored columnar filament 40 shown in Figure 2, the bending mechanism 14 can bend the ribbon filament 30 and the material layer 41 such that at least a portion of the material layer 41 is covered by the ribbon filament 30 to form the colored columnar filament 40. The material layer 41 forms the inner core of the colored columnar filament 40, and the ribbon filament 30 forms the outer layer of the colored columnar filament 40, covering the inner core. The radial dimension of the colored columnar filament 40 can range from 1.40 mm to 2.10 mm (inclusive of the endpoint values ​​of 1.40 mm and 2.10 mm). The thickness of the strip consumable 30 ranges from 0.1mm to 0.5mm (inclusive of the endpoint values ​​of 0.1mm and 0.5mm). As the strip consumable 30 passes below the adsorption material mechanism 13, it is arranged horizontally so that the pigment applied by the adsorption material mechanism 13 can be evenly distributed on the surface of the strip consumable 30 under gravity. The thickness of the strip consumable 30 is greater than the thickness of the laminar flow layer formed by adhesion to the inner wall of the printer nozzle. This allows the columnar consumable 40 to be output normally from the nozzle, reducing or preventing material layer leakage.

[0104] In this embodiment, the bending mechanism 14 can be a conical head. The bending mechanism 14 can bend the strip consumable 30. When the strip consumable 30 passes through the through hole 141, the strip consumable 30 can be tightly attached to the hole wall of the through hole 141, so that the two edges of the strip consumable 30 are close to each other. When the two edges in the length direction contact and bond, the material layer 41 is covered inside the strip consumable 30. At this time, the strip consumable 30 and the material layer 41 are approximately strip-shaped colored columnar consumable 40.

[0105] As the colored columnar filament 40 passes through the bending mechanism 14 and the discharge mechanism 12, the material layer 41 is encased inside the filament, so the material layer 41 will not adhere to the bending mechanism 14 or the discharge mechanism 12. This eliminates the need to use a large amount of flushing equipment to clean the pigment inside the 3D printing equipment 100, making the 3D printing equipment 100 more efficient and more environmentally friendly.

[0106] The color of the colored cylindrical filament 40 can be changed by altering the color of the feed component of the ribbon filament 30. The colored cylindrical filament 40 is continuously output from the tool head of the printer 20, thus eliminating the need for multiple tool heads in the 3D printing equipment 100. This reduction in the number of tool heads in the 3D printing equipment 100 leads to its miniaturization, reduces costs, and simplifies the workflow, thereby enhancing its market competitiveness.

[0107] In addition, if the colored strip consumable 30 does not completely cover the outer periphery of the material layer 41 during the process of passing through the bending mechanism 14, a small amount of material layer 41 will come into contact with the internal structure of the bending mechanism 14, the discharge mechanism 12 and / or the printer 20. The residual pigment inside each mechanism can be removed by rinsing with a small amount of consumable, which is relatively easy to achieve in actual production.

[0108] The feeding mechanism 12 is located in the feeding area 102. The feeding mechanism 12 is used to transport the colored cylindrical consumable 40 through the conveying pipe 15 to the outside of the 3D printing filament coloring device 10. Specifically, please refer to Figure 6, which is a structural schematic diagram of the feeding mechanism 12 shown in Figure 2. The feeding mechanism 12 includes a first pulling roller 121 and a second pulling roller 122. The peripheral side of the first pulling roller 121 is connected to the peripheral side of the second pulling roller 122. The peripheral side of the first pulling roller 121 is recessed with a first groove 1211, and the peripheral side of the second pulling roller 122 is recessed with a second groove 1221. The first groove 1211 and the second groove 1221 form a transmission channel 123, which is used for the colored cylindrical consumable 40 to pass through.

[0109] In this embodiment, the cross-section of the transmission channel 123 formed by the dispensing mechanism 12 can be circular. The cross-section of the transmission channel 123 can be adapted to the shape of the inner cross-section of the conveying pipe 15. When the colored columnar consumable 40 is output from the bending mechanism 14, the temperature of the colored columnar consumable 40 may be slightly high, at which point the colored columnar consumable 40 is flexible. In order to prevent the colored columnar consumable 40 from deforming and causing the internal pigment to leak out, the colored columnar consumable 40 can be further shaped and cooled by the dispensing mechanism 12 so that the strip consumable 30 can better wrap the material layer 41. The conveying pipe 15 can further shape and cool the colored columnar consumable 40 so that the structure of the colored columnar consumable 40 is stable and can be used by the printer 20.

[0110] In some other embodiments, please refer to FIG7, which is a schematic diagram of another 3D printing filament coloring apparatus 10 provided in an embodiment of this application. The 3D printing filament coloring apparatus 10 may also be provided with a support platform 50. The support platform 50 may be located on the side of the strip consumable 30 away from the additional material mechanism 13. In this embodiment, the support platform 50 can support the strip consumable 30, thereby keeping the distance between the strip consumable 30 and the additional material mechanism 13 constant, so that the additional material mechanism 13 can uniformly color different positions of the strip consumable 30.

[0111] Please refer to Figure 8, which is a structural schematic diagram of another 3D printing filament coloring apparatus 10 provided in an embodiment of this application. The 3D printing filament coloring apparatus 10 may also be provided with an apparatus housing 60. The apparatus housing 60 has a receiving space 601, and the feeding mechanism 11, discharging mechanism 12, material attaching mechanism 13, and bending mechanism 14 described above can all be located within the receiving space 601. In this embodiment, the apparatus housing 60 can protect the internal feeding mechanism 11, discharging mechanism 12, material attaching mechanism 13, and bending mechanism 14, preventing the external environment from affecting the operation of the feeding mechanism 11, discharging mechanism 12, material attaching mechanism 13, and bending mechanism 14.

[0112] This application also provides a 3D printing tool head (not shown in the figure). Please refer to Figure 10, which is a structural schematic diagram of a 3D printing tool head provided in an embodiment of this application. It includes a hot end 70 and a 3D printing filament coloring device 10 as described above. The hot end corresponds to the discharge mechanism of the 3D printing filament coloring device, and the hot end 70 is connected to the output port of the discharge mechanism 12 of the 3D printing filament coloring device 10. The columnar consumable 40 output from the discharge mechanism 12 of the 3D printing filament coloring device 10 is used to input into the hot end 70. After melting in the hot end 70, the columnar consumable 40 is extruded from the nozzle 702 of the hot end 70.

[0113] Specifically, the discharging mechanism 12 may further include a drive gear 124, which is coaxially arranged with the first pull wheel 121. The drive gear 124 can rotate under the action of a motor or other structure, and the first pull wheel 121 can be driven by the drive gear 124. The rotation of the first pull wheel 121 and the second pull wheel 122 can output the cylindrical consumable 40 from the discharging mechanism 12 to the hot end 70.

[0114] The discharge mechanism 12 may also include a housing 125. The housing 125 provides mounting positions for the drive gear 124, the first feed roller 121, and the second feed roller 122. The discharge mechanism 12 can be understood as an extruder.

[0115] The hot end 70 includes a heat sink 701 and a nozzle 702, which are connected to the housing 125 of the feeding mechanism 12. The heat sink 701 is connected between the first feed roller 121 and the nozzle 702. The cured columnar consumable 40 is printed through the nozzle 702.

[0116] For example, the 3D printing tool head also includes a delivery pipe 80, which connects the first pull roller 121 and the bending mechanism 14. The delivery pipe 80 is used to output the cylindrical filament 40 output from the bending mechanism 14 to the first pull roller 121 and the second pull roller 122.

[0117] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. [Correction 14.11.2025 based on Rule 91] A 3D printing filament synthesis device, characterized in that, The 3D printing filament assembly device includes a bending mechanism and an additional material assembly mechanism: The additional material mechanism is used to form a material layer on the surface of the strip consumable, and the bending mechanism is used to bend or wrap the strip consumable and the material layer along a direction perpendicular to the length of the strip consumable, so that at least part of the material layer is covered by the strip consumable to form a columnar consumable.

2. The 3D printing filament synthesis device according to claim 1, characterized in that, The bending mechanism has a through hole for bending or winding the strip consumable and the material layer inward. In the direction of movement of the strip consumable, the diameter of the through hole gradually decreases or decreases stepwise.

3. The 3D printing filament synthesis device according to claim 2, characterized in that, The through hole is a conical hole, and the taper of the hole wall is between 45° and 60°.

4. The 3D printing filament synthesis apparatus according to any one of claims 1-3, characterized in that, The strip consumable has a preset printing melting temperature, which enables the strip consumable to be fused and coated to form a columnar consumable. The bending mechanism operates in a heated state, and the operating temperature of the bending mechanism is lower than the preset printing melting temperature. The difference between the preset printing melting temperature and the operating temperature of the bending mechanism is 20℃-30℃.

5. The 3D printing filament synthesis apparatus according to any one of claims 1-3, characterized in that, The material of the strip consumable includes PLA, and the operating temperature range of the bending mechanism is between 150℃ and 210℃.

6. The 3D printing filament synthesis apparatus according to any one of claims 1-3, characterized in that, The material of the strip consumable includes PETG, and the operating temperature range of the bending mechanism is between 200℃ and 250℃.

7. The 3D printing filament synthesis apparatus according to any one of claims 1-3, characterized in that, The strip consumable is provided with a receiving groove, which is recessed on the surface of the strip consumable and extends or is arranged along the length of the strip consumable. The receiving groove is used to receive the material layer.

8. The 3D printing filament synthesis apparatus according to claim 7, characterized in that, The strip consumable has multiple raised folds, each of which extends along the length of the strip consumable, and a receiving groove is formed between two adjacent raised folds. Alternatively, the strip consumable may have multiple indentations, each indentation extending along the length of the strip consumable, and the recessed space of each indentation forming the receiving groove.

9. The 3D printing filament synthesis apparatus according to claim 7, characterized in that, The 3D printing filament synthesis device also includes a receiving groove forming device. Along the movement direction of the strip consumable, the receiving groove forming device is located before the additional material mechanism. The receiving groove forming device is used to form the receiving groove on the surface of the strip consumable so that the material layer is formed in the receiving groove when the strip consumable passes through the additional material mechanism.

10. The 3D printing filament synthesis apparatus according to claim 4, characterized in that, The ratio of the width to the thickness of the strip consumable is between 9 and 240.

11. A 3D printing filament coloring device, characterized in that, The 3D printing filament coloring device includes a 3D printing filament synthesis device as described in any one of claims 1-10 and a driving mechanism, wherein the driving mechanism is used to drive the strip consumable to move along the additional material mechanism toward the bending mechanism; The additional material mechanism is used to form a material layer including pigment on the surface of the strip consumable, and the bending mechanism is used to cover at least a portion of the material layer with the strip consumable to form a colored columnar consumable.

12. The 3D printing filament coloring apparatus according to claim 11, characterized in that, The driving mechanism includes a feeding mechanism and an output mechanism. The 3D printing wire coloring device is provided with an infeed area and an output area. The feeding mechanism is located in the infeed area, and the output mechanism is located in the output area. The additional material mechanism and the bending mechanism are both located between the feeding mechanism and the output mechanism. The feeding mechanism is used to transfer the strip consumable to the additional material mechanism, and the discharging mechanism is used to transport the colored columnar consumable to the outside of the 3D printing filament coloring device.

13. The 3D printing filament coloring apparatus according to claim 12, characterized in that, The material layer forms the inner core of the columnar consumable, and the strip consumable forms the outer layer of the columnar consumable, with the outer layer covering the inner core.

14. The 3D printing filament coloring apparatus according to any one of claims 11-13, characterized in that, The additional material mechanism includes a feeding component that can add pigments of different colors to the strip consumable.

15. The 3D printing filament coloring apparatus according to claim 14, characterized in that, The additional material mechanism includes three feeding components, the three feeding components being magenta, cyan, and yellow, respectively.

16. The 3D printing filament coloring apparatus according to claim 14, characterized in that, The additional material mechanism includes four feeding components, the four feeding components being magenta, cyan, yellow and black respectively.

17. The 3D printing filament coloring apparatus according to claim 14, characterized in that, The additional material mechanism further includes a mixing unit, which has a pigment outlet that is spaced apart from a surface of the strip consumable in the thickness direction. The feeding unit is used to spray pigment from the pigment outlet onto the strip consumable, wherein the pigment is pre-generated by the mixing unit.

18. The 3D printing filament coloring apparatus according to any one of claims 11-13, characterized in that, The feeding mechanism includes a first roller and a second roller, which are spaced apart. The gap between the first roller and the second roller is used for the strip consumable to pass through. The feeding mechanism is used to smoothly transfer the strip consumable to the additional material mechanism.

19. The 3D printing filament coloring apparatus according to any one of claims 11-13, characterized in that, The discharging mechanism includes a first pulling wheel and a second pulling wheel. The peripheral side of the first pulling wheel is connected to the peripheral side of the second pulling wheel. The peripheral side of the first pulling wheel is recessed with a first groove, and the peripheral side of the second pulling wheel is recessed with a second groove. The first groove and the second groove form a transmission channel, which is used for the colored columnar consumable to pass through.

20. The 3D printing filament coloring apparatus according to any one of claims 11-13, characterized in that, The diameter of the columnar consumable ranges from 1.40mm to 2.10mm, and the thickness of the strip consumable ranges from 0.1mm to 0.5mm. When the strip consumable passes under the additional material mechanism, the strip consumable is arranged horizontally so that the pigment applied by the additional material mechanism can be evenly distributed on the surface of the strip consumable under the action of gravity.

21. A 3D printing tool head, characterized in that, The device includes a hot end and a 3D printing filament coloring apparatus as described in any one of claims 11-20, wherein the hot end corresponds to the discharge mechanism of the 3D printing filament coloring apparatus, and the columnar consumable output by the discharge mechanism is used to input the hot end, wherein the columnar consumable melts in the hot end and is extruded from the nozzle of the hot end.

22. A 3D printing device, characterized in that, Includes a printer and a 3D printing filament coloring apparatus as described in any one of claims 11-20, wherein a columnar consumable output from the discharge mechanism is used to input the printer.

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