3D component printing method, and 3D component and 3D printer

Abstract

Disclosed in the present application are a 3D component printing method, and a 3D component and a 3D printer. The 3D component printing method, which is applied to printing an outer wall of a 3D component, comprises: printing a first deposition layer, wherein at least part of the first deposition layer has light transmittance; printing an ink-jet printed layer, wherein the ink-jet printed layer has a preset color, and the ink-jet printed layer and the first deposition layer are stacked; and printing a second deposition layer, wherein at least part of the second deposition layer has light transmittance, the second deposition layer and the first deposition layer are stacked, and the first deposition layer and the second deposition layer fix the ink-jet printed layer at the position where the ink-jet printed layer is printed, or the first deposition layer fixes the ink-jet printed layer at the position where the ink-jet printed layer is printed. Since a deposition layer is thicker than an ink-jet printed layer, compared with the printing solution in the related art in which a 3D component is obtained by means of ink-jet printing only, the present application is conducive to improving the printing speed.

Description

3D component printing method, 3D component, and 3D printer

Technical field

[0001] The present application relates to the technical field of 3D printing, and in particular to a 3D component printing method, a 3D component, and a 3D printer. [Background Technology]

[0002] A 3D printer (three-dimensional printer) is a processing device that converts digital model files into physical 3D components. Specifically, it uses a layer-by-layer stacking technique to stack printed materials layer by layer to construct the physical 3D component. In related art, full-color 3D components are typically produced through full-color inkjet printing. However, the thickness of each inkjet printed layer is relatively small, resulting in slow printing speeds.

[0003] [Summary of the invention]

[0004] To solve the above technical problems, the present application provides, on the one hand, a method for printing a 3D component, which is applied to printing the outer wall of a 3D component, including: printing a first deposition layer, the first deposition layer is at least partially light-transmissive; printing an inkjet-printed layer, the inkjet-printed layer has a preset color and is stacked with the first deposition layer; printing a second deposition layer, the second deposition layer is at least partially light-transmissive and is stacked with the first deposition layer; wherein the first deposition layer and the second deposition layer fix the inkjet-printed layer at the printing position of the inkjet-printed layer, or the first deposition layer fixes the inkjet-printed layer at the printing position of the inkjet-printed layer.

[0005] In some embodiments, the first deposition layer, the inkjet printing layer, and the second deposition layer are stacked, and the first deposition layer and the second deposition layer fix the inkjet printing layer at a printing position of the inkjet printing layer.

[0006] In some embodiments, printing an inkjet-printed layer includes: printing an inkjet-printed layer on a first deposition layer, wherein the line width of the inkjet-printed layer is smaller than the line width of the first deposition layer; printing a second deposition layer includes: printing the second deposition layer on the inkjet-printed layer, wherein the second deposition layer is at least partially in contact with and bonded to the first deposition layer, and the bonded first deposition layer and second deposition layer fix the inkjet-printed layer.

[0007] In some embodiments, the outer wall has an outer surface, and the line width of the second deposition layer is greater than the line width of the inkjet printed layer, so that the first deposition layer and the second deposition layer are in contact and bonded on a side of the inkjet printed layer close to the outer surface and a side away from the outer surface, respectively.

[0008] In some embodiments, printing an inkjet-printed layer includes: printing an inkjet-printed layer on a first deposition layer; printing a second deposition layer includes: printing the second deposition layer on the inkjet-printed layer, and curing at least the connection portion between the second deposition layer and the inkjet-printed layer so that the first deposition layer and the second deposition layer fix the inkjet-printed layer at the printing position of the inkjet-printed layer.

[0009] In some embodiments, the first deposition layer and the inkjet printing layer are stacked in a thickness direction of the outer wall, and the first deposition layer fixes the inkjet printing layer at a printing position of the inkjet printing layer.

[0010] In some embodiments, printing the first deposition layer includes: printing a first inner deposition layer and a first outer deposition layer, the first inner deposition layer and the first outer deposition layer being arranged side by side with a first preset gap; printing the inkjet printing layer includes: filling the inkjet printing layer in the first preset gap so that the first inner deposition layer and the first outer deposition layer fix the inkjet printing layer.

[0011] In some embodiments, printing the second deposition layer further includes: covering the inkjet-printed layer with the second deposition layer, wherein the second deposition layer is connected to the first inner deposition layer and the first outer deposition layer.

[0012] In some embodiments, the printing method also includes receiving a print file, the print file including the outer wall trajectory of each layer in the model, the texture image of the model, and the mapping relationship between the outer wall trajectory and the texture coordinates in the texture image; printing the first deposition layer includes: obtaining the outer wall trajectory of the first deposition layer, and printing the first deposition layer according to the outer wall trajectory of the first deposition layer; printing the inkjet printing layer includes: generating printing image data corresponding to the first deposition layer from the texture image according to the outer wall trajectory and the mapping relationship of the first deposition layer, and printing the inkjet printing layer according to the printing image data.

[0013] On the other hand, the present application provides a 3D component obtained by printing, the 3D component includes an outer wall, the outer wall includes: a first deposition layer, which is at least partially light-transmissive; an inkjet-printed layer, which has a preset color and is stacked with the first deposition layer; a second deposition layer, which is at least partially light-transmissive and is stacked with the first deposition layer; wherein the first deposition layer and the second deposition layer fix the inkjet-printed layer at the printing position of the inkjet-printed layer, or the first deposition layer fixes the inkjet-printed layer at the printing position of the inkjet-printed layer.

[0014] In some embodiments, the first deposition layer, the inkjet printed layer, and the second deposition layer are stacked, the second deposition layer is at least partially in contact with and bonded to the first deposition layer, and the bonded first and second deposition layers fix the inkjet printed layer.

[0015] In some embodiments, the outer wall has an outer surface, and in the thickness direction of the outer wall, the width of the first deposited layer is greater than the width of the inkjet printed layer, and the width of the second deposited layer is greater than the width of the inkjet printed layer, so that the first deposited layer and the second deposited layer are in contact and bonded on the side of the inkjet printed layer close to the outer surface and the side away from the outer surface, respectively.

[0016] In some embodiments, in the thickness direction of the outer wall, the first deposition layer includes a first inner deposition layer and a first outer deposition layer that are stacked, and the inkjet printing layer is sandwiched between the first inner deposition layer and the first outer deposition layer so that the first inner deposition layer and the first outer deposition layer fix the inkjet printing layer.

[0017] On the other hand, the present application provides a 3D printer, comprising: a first nozzle for printing a deposition layer; a second nozzle for printing an inkjet printing layer; and a processor for controlling the first nozzle and the second nozzle to execute the printing method described above.

[0018] In the outer wall of the 3D component printed using the above-described printing method, the first and second deposited layers are stacked, and the first and inkjet-printed layers are stacked. Because the first and second deposited layers have a certain degree of light transmittance, the outer wall of the 3D component exhibits a predetermined color overall. Because the deposited layers are relatively thicker than the inkjet-printed layers, this method improves printing speed compared to related art methods that produce 3D components solely through inkjet printing.

[0019] The first deposition layer and the second deposition layer fix the first inkjet-printed layer at the printing position of the first inkjet-printed layer, or the first deposition layer fixes the first inkjet-printed layer at the printing position of the first inkjet-printed layer, so that the first inkjet-printed layer is fixed at a preset position on the outer wall, thereby preventing the position of the first inkjet-printed layer on the outer wall from changing.

Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0021] FIG1 is a schematic flow chart of a method for printing a 3D component according to an embodiment of the present application;

[0022] FIG2 is a schematic structural diagram of the outer wall of a 3D component printed by a printing method according to an embodiment of the present application;

[0023] FIG3 is a schematic structural diagram of the outer wall of a 3D component printed by a printing method according to an embodiment of the present application;

[0024] FIG4 is a schematic structural diagram of the outer wall of a 3D component printed by a printing method according to an embodiment of the present application;

[0025] FIG5 is a schematic structural diagram of the outer wall of a 3D component printed by a printing method according to an embodiment of the present application;

[0026] FIG6 is a schematic flow chart of a method for printing a 3D component according to an embodiment of the present application;

[0027] FIG7 is a schematic diagram of generating texture coordinates (U4, V4 and U5, V5) corresponding to the intersection points based on the gcode coordinates of the intersection points of the slice and the triangle;

[0028] FIG8 is a schematic diagram of merging texture coordinates into a sequence in the process of simplifying the gcode path;

[0029] FIG9 is a schematic diagram of a 3D printer provided in accordance with an embodiment of the present application. [Specific implementation method]

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] In the solution of the present application, a 3D printer may include a first nozzle and a second nozzle. The first nozzle is used to print a deposition layer, and the second nozzle is used to print an inkjet-printed layer. The first nozzle may also be referred to as an FDM (Fused Deposition Modeling) nozzle, and the second nozzle may also be referred to as a UV (ultraviolet) nozzle.

[0032] The outer wall of a 3D component can be formed by stacking a deposited layer and an inkjet-printed layer. The inkjet-printed layer can be formed by curing ink of a predetermined color. Because the deposited layer has a certain degree of light transmittance, the outer wall of the 3D component can appear entirely in the predetermined color. It should be noted that in the description of this application, the outer wall of a 3D component refers to the exterior wall of the 3D component. For example, assuming the line width of the deposited layer is L, the shell thickness of the 3D component can be several times L, for example, the shell thickness can be L, 2L, 3L, and so on. When the shell thickness of a 3D component is L, the shell and the outer wall are synonymous. When the shell thickness of a 3D component is 2L, that is, the shell comprises two layers, the outer wall refers to the outermost layer of the shell, i.e., the layer visible to an external observer, and the other layers of the shell can be referred to as the inner wall. When the shell thickness of a 3D component is 3L, that is, the shell comprises three layers, the outer wall refers to the outermost layer of the shell, i.e., the layer visible to an external observer, and the other two layers of the shell can be referred to as the inner wall. Based on the above definition of the outer wall, it is easy to understand that the line width L of the deposited layer is the thickness of the outer wall.

[0033] The thickness direction of the outer wall mentioned in this application and the extension direction of the outer wall are perpendicular to each other. When this application mentions the width of the sedimentary layer / inkjet printed layer / unit layer, it means the width of the sedimentary layer / inkjet printed layer / unit layer in the thickness direction of the outer wall. When this application mentions the thickness of the sedimentary layer / inkjet printed layer / unit layer, it means the thickness of the sedimentary layer / inkjet printed layer / unit layer in the extension direction of the outer wall. The width of the sedimentary layer in the thickness direction of the outer wall is the line width of the sedimentary layer, and the width of the inkjet printed layer in the thickness direction of the outer wall is the line width of the inkjet printed layer.

[0034] First, as shown in FIG1 , the present application provides a method for printing a 3D component, the printing method comprising the following steps:

[0035] S100: Printing a first deposition layer 10, wherein at least a portion of the first deposition layer 10 is light-transmissive.

[0036] Specifically, the 3D printer can control the first nozzle to print the first deposition layer 10. For example, the material of the first deposition layer 10 can be PLA (Polylactic acid), of course, it can also be other transparent or translucent materials with a certain degree of light transmittance.

[0037] S200 : Printing a first inkjet printed layer 20 , where the first inkjet printed layer 20 has a preset color and is stacked with the first deposition layer 10 .

[0038] Specifically, the 3D printer can control the second nozzle to print the first inkjet printing layer 20. The first inkjet printing layer 20 can be formed by curing ink with a preset color. The specific material is not limited in this application, and those skilled in the art can select it according to actual needs.

[0039] S300 : printing a second deposition layer 30 , where the second deposition layer 30 is at least partially light-transmissive and is stacked with the first deposition layer 10 .

[0040] Specifically, the 3D printer can control the first nozzle to print the second deposition layer 30. The second deposition layer 30 can have the same material as the first deposition layer 10, and can also have the same line width as the first deposition layer 10.

[0041] The first deposition layer 10 and the second deposition layer 30 secure the first inkjet-printed layer 20 at the printing position of the first inkjet-printed layer 20. Alternatively, the first deposition layer 10 secures the first inkjet-printed layer 20 at the printing position of the first inkjet-printed layer 20, thereby securing the first inkjet-printed layer 20 at a predetermined position on the outer wall and preventing it from moving. It should be noted that the "printing position of the first inkjet-printed layer 20" described herein refers to the predetermined position of the first inkjet-printed layer 20 on the outer wall.

[0042] By repeatedly performing the above steps, the outer wall of the 3D component can be obtained. In the outer wall of the 3D component obtained by printing using the above printing method, the first sedimentary layer 10 and the second sedimentary layer 30 are stacked, and the first sedimentary layer 10 and the inkjet-printed layer 20 are stacked. Because the first sedimentary layer 10 and the second sedimentary layer 30 have a certain degree of light transmittance, the outer wall of the 3D component as a whole exhibits a predetermined color. Because the sedimentary layer is relatively thicker than the inkjet-printed layer, this method improves printing speed compared to related art methods that produce 3D components solely through inkjet printing.

[0043] The first deposition layer 10 and the second deposition layer 30 fix the first inkjet-printed layer 20 at the printing position of the first inkjet-printed layer 20, or the first deposition layer 10 fixes the first inkjet-printed layer 20 at the printing position of the first inkjet-printed layer 20, so that the first inkjet-printed layer 20 is fixed at a preset position on the outer wall, thereby preventing the position of the first inkjet-printed layer 20 on the outer wall from changing.

[0044] In some embodiments (such as the embodiments shown in FIG. 2 , 3 , and 4 ), after S300 , the following steps may also be included:

[0045] S310 : Printing a second inkjet printed layer 40 , where the second inkjet printed layer 40 has a preset color and is stacked with the second deposition layer 30 .

[0046] The specific steps of S310 may be the same as or similar to those of S200 and are within the scope that can be easily understood by those skilled in the art, and are not described in detail here.

[0047] In some embodiments (such as those shown in Figures 2, 3, and 4), the outer wall of a 3D component can be obtained by repeatedly executing S100, S200, S300, and S310. In this way, in the outer wall of the ultimately printed 3D component, one deposited layer and one inkjet-printed layer can constitute a unit layer. The unit layer described in this application refers to the smallest repeating unit in the outer wall structure.

[0048] In some embodiments (such as the embodiment shown in FIG. 5 ), this can be achieved by executing S100 , S200 , and S300 in a loop for multiple rounds. In this way, in the outer wall of the 3D component finally printed, two deposition layers and one inkjet printing layer can constitute a unit layer. This application does not impose any restrictions on this, and those skilled in the art can make a choice based on actual needs.

[0049] In some embodiments (such as those shown in Figures 2, 3, and 4), the first deposition layer 10, the first inkjet-printed layer 20, and the second deposition layer 30 are stacked, and the first deposition layer 10 and the second deposition layer 30 fix the first inkjet-printed layer 20 at the printing position of the first inkjet-printed layer 20.

[0050] In some embodiments (such as the embodiment shown in Figure 5), the first deposition layer 10 and the first inkjet printing layer 20 are stacked in the thickness direction of the outer wall, and the first deposition layer 10 fixes the first inkjet printing layer 20 at the printing position of the first inkjet printing layer 20.

[0051] In some embodiments, in order to improve the strength of the 3D component, the printing method may also include printing the inner wall, printing the internal filler, etc. This application does not limit this, and those skilled in the art can make choices based on actual needs.

[0052] As shown in FIG. 2 , FIG. 2 is a schematic structural diagram of the outer wall of a 3D component printed by a printing method according to an embodiment of the present application.

[0053] In this embodiment, S200 may specifically include:

[0054] S201 : printing a first inkjet printed layer 20 on the first deposition layer 10 , wherein the line width of the first inkjet printed layer 20 is equal to the line width of the first deposition layer 10 .

[0055] It should be noted that the term "equal" as used herein means approximately equal, allowing for a certain margin of error, such as within 10%. Specifically, the 3D printer can control the line width of the first inkjet-printed layer 20 so that, along the thickness direction of the outer wall, the width of the first inkjet-printed layer 20 is equal to the width of the first deposited layer 10.

[0056] S300 specifically includes:

[0057] S301: Printing a second deposition layer 30 on the first inkjet printed layer 20, and curing at least the connection portion between the second deposition layer 30 and the first inkjet printed layer 20, so that the first deposition layer 10 and the second deposition layer 30 fix the first inkjet printed layer 20 at the printing position of the first inkjet printed layer 20.

[0058] Specifically, the line width of the second deposition layer 30 can be equal to the line width of the first deposition layer 10. The second deposition layer 30 can be printed on the uncured first inkjet-printed layer 20, and then the first inkjet-printed layer 20 can be cured via the second deposition layer 30. In other words, before printing the second deposition layer 30, the first inkjet-printed layer 20 can be left uncured, or the curing degree of the first inkjet-printed layer 20 can be controlled to prevent the first inkjet-printed layer 20 from being fully cured. In this way, the second deposition layer 30 can be bonded to the first inkjet-printed layer 20 before the first inkjet-printed layer 20 is fully cured, ensuring a strong bonding force between the first inkjet-printed layer 20 and the second deposition layer 30, specifically, a bonding force greater than 5 MPa.

[0059] It should be noted that the bonding strength between two adjacent layers mentioned in this application is tested according to gb / t-1040 (ISO527).

[0060] In addition, since the first deposition layer 10 is bonded to the first inkjet printed layer 20 before the first inkjet printed layer 20 is cured, there is a strong bonding force between the first inkjet printed layer 20 and the first deposition layer 10 . Specifically, the bonding force is greater than 5 MPa.

[0061] S310 may specifically include: printing a second inkjet printed layer 40 on the second deposition layer 30. The specific steps of S310 may be the same as or similar to those of S200, and are within the scope that can be easily understood by those skilled in the art, and will not be repeated here.

[0062] The outer wall has an outer surface. In the thickness direction of the outer wall, the first deposited layer 10 includes a first end proximal to the outer surface and a second end distal to the outer surface. The first inkjet-printed layer 20 includes a first end proximal to the outer surface and a second end distal to the outer surface. The second deposited layer 30 includes a first end proximal to the outer surface and a second end distal to the outer surface. The second inkjet-printed layer 40 includes a first end proximal to the outer surface and a second end distal to the outer surface. In this embodiment, the first end of the first deposited layer 10, the first end of the first inkjet-printed layer 20, the first end of the second deposited layer 30, and the first end of the second inkjet-printed layer 40 are all exposed on the outer surface of the outer wall.

[0063] By executing S100, S200, S300, and S310 in a loop for multiple rounds, the outer wall shown in FIG2 can be obtained. In each round of executing S100, S200, S300, and S310, the specific steps of S100 can be the same as or similar to those of S300, and the specific steps of S200 can be the same as or similar to those of S310.

[0064] In the solution of this embodiment, each inkjet-printed layer has a strong bonding force with the two adjacent deposited layers and is not easily separated from each other. The two adjacent deposited layers fix the inkjet-printed layer at the printing position of the inkjet-printed layer, so that the inkjet-printed layer is fixed at the preset position of the outer wall and is not easily moved. In addition, the outer wall of the 3D component finally printed has a high reliability.

[0065] In this embodiment, the outer wall shown in FIG2 can be obtained by repeatedly executing S100, S200, S300, and S310. As shown in FIG2, the outer wall includes a plurality of stacked unit layers 100, wherein each unit layer 100 includes a stacked deposition layer and an inkjet-printed layer. In the outer wall, the deposition layers and inkjet-printed layers are alternately arranged.

[0066] For example, when the first round of S100, S200, S300, and S310 is executed, the first inkjet printed layer 20 and the second deposition layer 30 formed as a whole can be regarded as a unit layer 100; the second inkjet printed layer 40 formed when the first round of S100, S200, S300, and S310 is executed and the first deposition layer 10 formed when the second round of S100, S200, S300, and S310 is executed can be regarded as a unit layer 100 as a whole.

[0067] The bonding force between each inkjet-printed layer and the two adjacent deposited layers can be greater than 5MPa, and they are not easily separated from each other. The two adjacent deposited layers fix the inkjet-printed layer at the printing position of the inkjet-printed layer, and the outer wall of the 3D component finally printed has high reliability.

[0068] In each unit layer 100, the ratio of the thickness of the inkjet-printed layer to the thickness of the unit layer 100 can be less than or equal to 1 / 2. Specifically, the ratio of the thickness of the inkjet-printed layer to the thickness of the unit layer 100 is less than or equal to 1 / 2. This allows the deposited layer to occupy a larger thickness in the unit layer 100, which helps increase printing speed and reduce the difficulty of the FDM process. If the thickness of the FDM is smaller, the printing process will be relatively difficult.

[0069] As shown in FIG3 , FIG3 is a schematic structural diagram of a 3D component printed by a printing method according to an embodiment of the present application.

[0070] In this embodiment, S200 may specifically include:

[0071] S202 : Printing a first inkjet printed layer 20 on the first deposition layer 10 , wherein the line width of the first inkjet printed layer 20 is smaller than the line width of the first deposition layer 10 , so that at least a portion of the first deposition layer 10 is exposed relative to the first inkjet printed layer 20 .

[0072] Assuming that the line width of the first deposition layer 10 is L, the line width of the first inkjet-printed layer 20 can be between (1 / 5)L and (4 / 5)L. The first inkjet-printed layer 20 can be entirely located on the first deposition layer 10. In the thickness direction of the outer wall, since the width of the first inkjet-printed layer 20 is smaller than the width of the first deposition layer 10, at least a portion of the first deposition layer 10 is exposed relative to the first inkjet-printed layer 20.

[0073] The outer wall has an outer surface. In the thickness direction of the outer wall, the first deposited layer 10 includes a first end proximal to the outer surface and a second end distal to the outer surface. The first inkjet-printed layer 20 includes a first end proximal to the outer surface and a second end distal to the outer surface. Specifically, the first end of the first inkjet-printed layer 20 can be aligned with the first end of the first deposited layer 10. It should be noted that the term "aligned" used herein means approximately aligned, with a certain tolerance allowed, such as within 10%.

[0074] S300 specifically includes:

[0075] S302 : Printing a second deposition layer 30 on the first inkjet printed layer 20 , wherein the second deposition layer 30 is at least partially in contact with and bonded to the first deposition layer 10 , and the bonded first deposition layer 10 and second deposition layer 30 fix the first inkjet printed layer 20 .

[0076] Specifically, the line width of the second deposition layer 30 may be equal to the line width of the first deposition layer 10. The second deposition layer 30 is in at least partial contact with the first deposition layer 10 on a side of the first inkjet printed layer 20 away from the outer surface.

[0077] S310 may specifically include: printing a second inkjet printed layer 40 on the second deposition layer 30. The specific steps of S310 may be the same as or similar to those of S200, and are within the scope that can be easily understood by those skilled in the art, and will not be repeated here.

[0078] Along the thickness direction of the outer wall, the second deposition layer 30 includes a first end proximal to the outer surface and a second end distal to the outer surface, and the second inkjet-printed layer 40 includes a first end proximal to the outer surface and a second end distal to the outer surface. In this embodiment, the first end of the first deposition layer 10, the first end of the first inkjet-printed layer 20, the first end of the second deposition layer 30, and the first end of the second inkjet-printed layer 40 are all exposed on the outer surface of the outer wall.

[0079] By executing S100, S200, S300, and S310 in a loop for multiple rounds, the outer wall shown in FIG3 can be obtained. In each round of executing S100, S200, S300, and S310, the specific steps of S100 can be the same as or similar to those of S300, and the specific steps of S200 can be the same as or similar to those of S310.

[0080] In this embodiment, the first inkjet printed layer 20 can be cured using the following two methods:

[0081] Solution 1: After S202, S200 may further include curing the first inkjet-printed layer 20 until the first inkjet-printed layer 20 is completely cured. At this point, since the first deposition layer 10 is already bonded to the first inkjet-printed layer 20 before curing, the first inkjet-printed layer 20 and the first deposition layer 10 have a strong bonding force, specifically greater than 5 MPa. The second deposition layer 30 is bonded to the first inkjet-printed layer 20 after the first inkjet-printed layer 20 is completely cured, and the bonding force between the two is relatively low, less than 5 MPa.

[0082] Solution 2: In some embodiments, S302 may specifically include printing a second deposition layer 30 on the uncured first inkjet-printed layer 20, and then curing the first inkjet-printed layer 20 via the second deposition layer 30. In other words, before printing the second deposition layer 30, the first inkjet-printed layer 20 may not be cured, or the curing degree of the first inkjet-printed layer 20 may be controlled to prevent the first inkjet-printed layer 20 from being fully cured. In this way, the second deposition layer 30 can be bonded to the first inkjet-printed layer 20 before the first inkjet-printed layer 20 is fully cured, ensuring a strong bonding force between the first inkjet-printed layer 20 and the second deposition layer 30, specifically, a bonding force greater than 5 MPa.

[0083] In the solution of this embodiment, the first deposition layer 10 and the second deposition layer 30 are at least partially in contact. Since the two deposition layers have a strong bonding force, they are not easily separated from each other. Therefore, no matter which of the above-mentioned curing schemes (Scheme 1 or Scheme 2) is adopted, the bonded first deposition layer 10 and the second deposition layer 30 can fix the first inkjet printed layer 20, so that the first inkjet printed layer 20 is maintained at a preset position on the outer wall and is not easily moved. In addition, the outer wall of the 3D component finally printed can have higher reliability.

[0084] In this embodiment, the outer wall shown in FIG3 can be obtained by repeatedly executing S100, S200, S300, and S310. As shown in FIG3, the outer wall includes a plurality of stacked unit layers 100, wherein each unit layer 100 includes a stacked deposition layer and an inkjet-printed layer. In the outer wall, the deposition layers and inkjet-printed layers are alternately arranged.

[0085] For example, when the first round of S100, S200, S300, and S310 is executed, the first inkjet printed layer 20 and the second deposition layer 30 formed as a whole can be regarded as a unit layer 100; the second inkjet printed layer 40 formed when the first round of S100, S200, S300, and S310 is executed and the first deposition layer 10 formed when the second round of S100, S200, S300, and S310 is executed can be regarded as a unit layer 100 as a whole.

[0086] In the thickness direction of the outer wall, the width of the inkjet printed layer can be smaller than the width of the deposited layer, so that each two adjacent deposited layers are at least partially in contact and bonded, and there is a strong bonding force between the two deposited layers, which fixes the inkjet printed layer, so that the inkjet printed layer is maintained at a preset position on the outer wall and is not easy to move, and the outer wall of the 3D component finally printed has high reliability.

[0087] In each unit layer 100, the ratio of the thickness of the inkjet-printed layer to the thickness of the unit layer 100 can be less than or equal to 1 / 2. Specifically, the ratio of the thickness of the inkjet-printed layer to the thickness of the unit layer 100 is less than or equal to 1 / 2, so that the deposited layer occupies a larger thickness in the unit layer 100, which is beneficial for increasing printing speed and reducing the difficulty of the FDM process.

[0088] As shown in FIG4 , FIG4 is a schematic structural diagram of a 3D component printed by a printing method according to an embodiment of the present application.

[0089] In this embodiment, S200 may specifically include:

[0090] S203 : printing a first inkjet printed layer 20 on the first deposition layer 10 , wherein the line width of the first inkjet printed layer 20 is smaller than the line width of the first deposition layer 10 , so that at least a portion of the first deposition layer 10 is exposed relative to the first inkjet printed layer 20 .

[0091] Assuming that the line width of the first deposition layer 10 is L, the line width of the first inkjet-printed layer 20 can be between (1 / 5)L and (4 / 5)L. The first inkjet-printed layer 20 can be entirely located on the first deposition layer 10. In the thickness direction of the outer wall, since the width of the first inkjet-printed layer 20 is smaller than the width of the first deposition layer 10, at least a portion of the first deposition layer 10 is exposed relative to the first inkjet-printed layer 20.

[0092] The outer wall has an outer surface. In the thickness direction of the outer wall, the first deposited layer 10 includes a first end proximal to the outer surface and a second end distal to the outer surface. The first inkjet-printed layer 20 includes a first end proximal to the outer surface and a second end distal to the outer surface. Specifically, S203 may include controlling the first end of the first inkjet-printed layer 20 to be offset by a first predetermined distance relative to the first end of the first deposited layer 10 in a direction toward the second end of the first deposited layer 10.

[0093] Specifically, assuming that the line width of the first deposition layer 10 is L, the first end of the first inkjet-printed layer 20 may be offset from the first end of the first deposition layer 10 by a first preset distance between (1 / 5)L and (2 / 5)L.

[0094] S300 specifically includes:

[0095] S303 : Printing a second deposition layer 30 on the first inkjet printed layer 20 , wherein the second deposition layer 30 is at least partially in contact with and bonded to the first deposition layer 10 , and the bonded first deposition layer 10 and second deposition layer 30 fix the first inkjet printed layer 20 .

[0096] Specifically, the line width of the second deposition layer 30 can be equal to the line width of the first deposition layer 10. The first end of the second deposition layer 30 can be controlled to be offset by a second preset distance relative to the first end of the first inkjet-printed layer 20 in the direction of the first end of the first deposition layer 10, so that the first deposition layer 10 and the second deposition layer 30 are respectively in contact and bonded with each other on the side close to the outer surface and the side away from the outer surface of the first inkjet-printed layer 20, thereby better fixing the first inkjet-printed layer 20.

[0097] S310 may specifically include: printing a second inkjet printed layer 40 on the second deposition layer 30. The specific steps of S310 may be the same as or similar to those of S200, and are within the scope that can be easily understood by those skilled in the art, and will not be repeated here.

[0098] In the thickness direction of the outer wall, the second deposition layer 30 includes a first end proximal to the outer surface and a second end distal to the outer surface, and the second inkjet-printed layer 40 includes a first end proximal to the outer surface and a second end distal to the outer surface. In this embodiment, the first end of the first deposition layer 10 and the first end of the second deposition layer 30 are exposed on the outer surface of the outer wall, while the first end of the first inkjet-printed layer 20 and the first end of the second inkjet-printed layer 40 are not exposed. This allows the outer surface to be formed by connecting the first deposition layer 10 and the second deposition layer 30, which helps improve the smoothness of the outer surface. By repeatedly executing S100, S200, S300, and S310 multiple times, the outer wall shown in Figure 4 can be obtained. In each round of S100, S200, S300, and S310, the specific steps of S100 can be the same or similar to those of S300, and the specific steps of S200 can be the same or similar to those of S310.

[0099] In this embodiment, the first inkjet printed layer 20 can be cured using the following two methods:

[0100] Solution 1: After S203, S200 may further include curing the first inkjet-printed layer 20 until the first inkjet-printed layer 20 is completely cured. At this point, since the first deposition layer 10 is already bonded to the first inkjet-printed layer 20 before curing, the first inkjet-printed layer 20 and the first deposition layer 10 have a strong bonding force, specifically greater than 5 MPa. The second deposition layer 30 is bonded to the first inkjet-printed layer 20 after the first inkjet-printed layer 20 is completely cured, and the bonding force between the two is relatively low, less than 5 MPa.

[0101] Solution 2: In some embodiments, S303 may specifically include printing a second deposition layer 30 on the uncured first inkjet-printed layer 20, and then curing the first inkjet-printed layer 20 via the second deposition layer 30. In other words, before printing the second deposition layer 30, the first inkjet-printed layer 20 may not be cured, or the curing degree of the first inkjet-printed layer 20 may be controlled to prevent the first inkjet-printed layer 20 from being fully cured. In this way, the second deposition layer 30 can be bonded to the first inkjet-printed layer 20 before the first inkjet-printed layer 20 is fully cured, ensuring a strong bonding force between the first inkjet-printed layer 20 and the second deposition layer 30, specifically, a bonding force greater than 5 MPa.

[0102] In the solution of this embodiment, the first deposition layer 10 and the second deposition layer 30 are respectively in contact and bonded on the side close to the outer surface and the side away from the outer surface of the first inkjet printed layer 20. Since the two deposition layers have a strong bonding force, they are not easily separated from each other. Therefore, no matter which of the above-mentioned curing schemes (Scheme 1 or Scheme 2) is adopted, the bonded first deposition layer 10 and the second deposition layer 30 can fix the first inkjet printed layer 20, so that the first inkjet printed layer 20 is maintained at a preset position on the outer wall and is not easy to move, and the outer wall of the 3D component finally printed can have higher reliability.

[0103] In addition, in the solution of this embodiment, the outer surface of the outer wall is formed by deposited layers connected to each other, which is beneficial for improving the smoothness of the outer surface compared to the embodiments shown in Figures 2 and 3.

[0104] In some embodiments, the first deposition layer 10 and the second deposition layer 30 may be in contact and bonded on a side of the first inkjet-printed layer 20 close to the outer surface, and separated from each other on a side of the first inkjet-printed layer 20 away from the outer surface. This is within the scope that can be easily understood by those skilled in the art and will not be further described herein.

[0105] In this embodiment, the outer wall shown in FIG4 can be obtained by repeatedly executing S100, S200, S300, and S310. As shown in FIG4, the outer wall includes a plurality of stacked unit layers 100, wherein each unit layer 100 includes a stacked deposition layer and an inkjet-printed layer. In the outer wall, the deposition layers and inkjet-printed layers are alternately arranged.

[0106] For example, when the first round of S100, S200, S300, and S310 is executed, the first inkjet printed layer 20 and the second deposition layer 30 formed as a whole can be regarded as a unit layer 100; the second inkjet printed layer 40 formed when the first round of S100, S200, S300, and S310 is executed and the first deposition layer 10 formed when the second round of S100, S200, S300, and S310 is executed can be regarded as a unit layer 100 as a whole.

[0107] In the thickness direction of the outer wall, the width of the inkjet printed layer can be smaller than the width of the deposited layer, so that each two adjacent deposited layers are in contact and bonded on the side of the inkjet printed layer close to the outer surface and the side away from the outer surface respectively. There is a strong bonding force between the two deposited layers, which fixes the inkjet printed layer, so that the inkjet printed layer is maintained at the preset position of the outer wall and is not easy to move, and the outer wall of the 3D component finally printed has high reliability.

[0108] Furthermore, since the outer surface of the outer wall is formed by deposited layers connected to each other, it is beneficial to improve the smoothness of the outer surface.

[0109] In each unit layer 100, the ratio of the thickness of the inkjet-printed layer to the thickness of the unit layer 100 can be less than or equal to 1 / 2. Specifically, the ratio of the thickness of the inkjet-printed layer to the thickness of the unit layer 100 is less than or equal to 1 / 2, so that the deposited layer occupies a larger thickness in the unit layer 100, which is beneficial for increasing printing speed and reducing the difficulty of the FDM process.

[0110] In some embodiments, each two adjacent deposited layers may also be at least partially in contact on the side of the inkjet printed layer close to the outer surface, and separated from each other on the side of the inkjet printed layer away from the outer surface. This is within the scope that can be easily understood by those skilled in the art and will not be further elaborated here.

[0111] As shown in FIG5 , FIG5 is a schematic structural diagram of a 3D component printed by a printing method according to an embodiment of the present application.

[0112] In this embodiment, S100 may specifically include:

[0113] S104 : Printing a first inner deposition layer 11 and a first outer deposition layer 12 , wherein the first inner deposition layer 11 and the first outer deposition layer 12 are arranged side by side with a first preset gap.

[0114] Specifically, assuming that the line width of the first outer deposition layer 12 is L, the line width of the first inner deposition layer 11 can be greater than or equal to 3L, and the width of the first preset gap can be close to L, for example, the width of the first preset gap can be between L-1.5L. Of course, this application does not limit this, and those skilled in the art can make a choice according to actual needs.

[0115] S200 may specifically include:

[0116] S204 : filling the first inkjet printed layer 20 in the first preset gap, so that the first inner deposition layer 11 and the first outer deposition layer 12 fix the first inkjet printed layer 20 .

[0117] S300 specifically includes:

[0118] S304 : Covering the first inkjet printed layer 20 with a second deposition layer 30 , wherein the second deposition layer 30 connects the first inner deposition layer 11 and the first outer deposition layer 12 .

[0119] Specifically, the second deposition layer 30 can be formed by ironing with a small flow rate. In the description of the present application, the first inner deposition layer 11 and the first outer deposition layer 12 are integrally referred to as the first deposition layer 10 .

[0120] The outer wall has an outer surface. In the thickness direction of the outer wall, the first deposited layer 10 includes a first end proximal to the outer surface and a second end distal to the outer surface. The first inkjet-printed layer 20 includes a first end proximal to the outer surface and a second end distal to the outer surface. In this embodiment, the first end of the first deposited layer 10 is exposed on the outer surface of the outer wall, while the first end of the first inkjet-printed layer 20 is not exposed.

[0121] By repeatedly executing S100, S200, and S300, the outer wall shown in FIG5 can be obtained. The first inner deposition layer 11 and the first outer deposition layer 12 secure the first inkjet-printed layer 20, fixing the first inkjet-printed layer 20 at its printing position, so that the first inkjet-printed layer 20 is maintained at a predetermined position on the outer wall and is not easily moved.

[0122] In addition, in the solution of this embodiment, the outer surface of the outer wall is formed by deposited layers connected to each other, which is beneficial for improving the smoothness of the outer surface compared to the embodiments shown in Figures 2 and 3.

[0123] In addition, in the solution of this embodiment, every two inkjet printed layers are separated by the second deposition layer 30, thereby avoiding color bleeding between the two inkjet printed layers, which is beneficial to improving the color effect of the outer wall.

[0124] In this embodiment, the outer wall shown in FIG5 can be obtained by repeatedly executing S100, S200, and S300. As shown in FIG5, the outer wall includes multiple stacked unit layers 100, wherein each unit layer 100 includes a deposited layer and an inkjet-printed layer stacked in the thickness direction of the outer wall. For example, the first deposited layer 10, the first inkjet-printed layer 20, and the second deposited layer 30 can be collectively considered as a unit layer 100.

[0125] The deposited layers in two adjacent unit layers are at least partially in contact on the side of the inkjet printed layer close to the outer surface, and at least partially in contact on the side of the inkjet printed layer away from the outer surface. Due to the strong bonding force between the two deposited layers, they are not easily separated from each other, so that the outer wall of the 3D component finally printed has high reliability.

[0126] In each unit layer, the deposition layer includes an inner deposition layer and an outer deposition layer stacked in the thickness direction of the outer wall. The inner deposition layer and the outer deposition layer fix the inkjet printing layer at the printing position of the inkjet printing layer, so that the inkjet printing layer is maintained at a preset position on the outer wall and is not easily moved.

[0127] In each unit layer 100, the ratio of the width of the inkjet-printed layer to the width of the unit layer 100 in the thickness direction is less than or equal to 1 / 2. This ensures that the deposited layers in two adjacent unit layers have sufficient width to contact each other on both the side of the inkjet-printed layer closer to the outer surface and the side farther from the outer surface, further improving the reliability of the outer wall of the ultimately printed 3D component.

[0128] Furthermore, the deposition layers in two adjacent unit layers are at least partially in contact on the side of the inkjet printed layer close to the outer surface, so that the outer surface of the outer wall is formed by the deposition layers connected to each other, which is beneficial to improving the smoothness of the outer surface.

[0129] In each unit layer 100 , since the second deposition layer is formed by ironing with a small flow rate, its thickness is relatively small. Therefore, the ratio of the thickness of the inkjet printed layer to the thickness of the unit layer 100 may be greater than or equal to 4 / 5.

[0130] As shown in FIG6 , the present application also provides another method for printing a 3D component. This method differs from the method shown in FIG1 in that, before S100 , the method further includes:

[0131] S10: receiving a printing file, where the printing file includes an outer wall trajectory of each layer in the model, a texture image of the model, and a mapping relationship between the outer wall trajectory and texture coordinates in the texture image.

[0132] Specifically, the trajectory of each layer consists of multiple paths, and each path stores a corresponding texture coordinate sequence.

[0133] A 3D printer can receive print files sent by a PC (Personal Computer). For example, the PC can obtain the gcode outer wall trajectory of each layer and the mapping relationship between the gcode outer wall trajectory and the texture coordinates in the texture image through the following steps:

[0134] a. Get the gcode coordinates and texture coordinates, as well as the corresponding texture images, from the 3D model file.

[0135] b. As shown in Figure 7, based on the GCO coordinates (X4, Y4, Z4 and X5, Y5, Z5) of the intersection points between the slice and the triangle (the three vertices of the triangle are X1, Y1, Z1, X2, Y2, Z2, and X3, Y3, Z3 respectively), the texture coordinates (U4, V4 and U5, V5) corresponding to the intersection points are generated by linear interpolation using the following formula: (U4,V4)=(U2,V2)+((U1,V1)-(U2,V2))*Dis 24 / Dis 21

[0136] Furthermore, the texture coordinates of several points on the path segment can be calculated using a linear interpolation algorithm based on the texture coordinates of the intersection points.

[0137] c. As shown in Figure 8, during the process of simplifying the Gcode path, the texture coordinates are combined into a sequence. Each element in the texture coordinate sequence includes a texture coordinate pair and the ratio of the original path L1 to the simplified path L2, so that each simplified Gcode path segment corresponds to a texture coordinate sequence, as shown below:

[0138] Plain Text

[0139] / / gcode part

[0140] ...

[0141] Layer 1

[0142] Step 1

[0143] Step 2

[0144] Step 3

[0145] ...

[0146] / / Texture sequence part

[0147] ...

[0148] Layer 1

[0149] Step 1:

[0150] Step 2:R0,U00,V00,U01,V01|R1,U10,V10,U11,V11|...|R2,U20,V20,U21,V21

[0151] Step 3:R0,U00,V00,U01,V01|R1,U10,V10,U11,V11|...|R2,U20,V20,U21,V21

[0152] ...

[0153] The mapping relationship between the gcode outer wall trajectory and the texture coordinates in the texture image can be stored in the same gcode file or stored separately in two files. Of course, this application does not limit this, and those skilled in the art can make a choice according to actual needs.

[0154] In this embodiment, S100 may specifically include: acquiring an outer wall trajectory of the first deposition layer, and printing the first deposition layer according to the outer wall trajectory of the first deposition layer.

[0155] S200 may specifically include: generating printing image data corresponding to the first deposition layer from the texture image according to the outer wall trajectory and the mapping relationship of the first deposition layer, and printing the first inkjet printing layer according to the printing image data.

[0156] Specifically, according to the texture coordinate sequence corresponding to each path in the outer wall trajectory of the first deposition layer, the corresponding pixel points can be obtained from the texture image, and an image can be generated according to a preset size. Then, the image is subjected to a RIP (Raster Image Processor) algorithm to generate printing image data.

[0157] S300 may specifically include: acquiring an outer wall trajectory of the second deposition layer, and printing the second deposition layer according to the outer wall trajectory of the second deposition layer.

[0158] In the related art, the PC needs to send the print image data corresponding to each inkjet-printed layer to the 3D printer. Due to the large number of printed layers and the large total data volume, a large amount of storage space and transmission bandwidth are consumed. In the solution of this embodiment, the print image data corresponding to each inkjet-printed layer is generated by the 3D printer based on the outer wall trajectory of each layer in the model, the model's texture image, and the mapping relationship between the outer wall trajectory and the texture coordinates in the texture image. This helps reduce the amount of data transmitted between the PC and the 3D printer.

[0159] In addition, as shown in FIG9 , the present application further provides a 3D printer 500 . The 3D printer includes: a first nozzle 510 for printing a deposition layer; a second nozzle 520 for printing an inkjet printing layer; and a processor 530 for controlling the first nozzle 510 and the second nozzle 520 to execute the printing method of any of the above embodiments.

[0160] The processor 530 may also be referred to as a CPU (Central Processing Unit). The processor 530 may be an integrated circuit chip having signal processing capabilities. The processor 530 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. A general-purpose processor may be a microprocessor, or the processor 530 may be any conventional processor.

[0161] In the foregoing description of this specification, unless otherwise expressly specified or limited, terms such as "fixed," "mounted," "connected," or "connected" should be understood broadly. For example, the term "connected" can refer to a fixed connection, a removable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediary; or the internal connection between two components or the interaction between two components. Therefore, unless otherwise expressly defined in this specification, those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0162] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0163] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinal numbers are used for descriptive purposes only and should not be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, "plurality" means at least two, such as two, three or more, etc., unless otherwise clearly specified.

[0164] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A printing method for a 3D component, applied to the printing of the outer wall of the 3D component, characterized in that, Comprising: Printing a first deposition layer, at least part of which is light-transmissive; Printing an inkjet printing layer, which has a preset color and is stacked with the first deposition layer; Printing a second deposition layer, at least part of which is light-transmissive and is stacked with the first deposition layer; Wherein, the first deposition layer and the second deposition layer fix the inkjet printing layer at the printing position of the inkjet printing layer, or, the first deposition layer fixes the inkjet printing layer at the printing position of the inkjet printing layer.

2. The printing method according to claim 1, characterized in that The first deposition layer, the inkjet printing layer, and the second deposition layer are stacked, and the first deposition layer and the second deposition layer fix the inkjet printing layer at the printing position of the inkjet printing layer.

3. The printing method according to claim 2, wherein: The printing of the inkjet printing layer includes: Printing the inkjet printing layer on the first deposition layer, and the line width of the inkjet printing layer is smaller than the line width of the first deposition layer; The printing of the second deposition layer includes: Printing the second deposition layer on the inkjet printing layer, and at least part of the second deposition layer is in contact and adhered to the first deposition layer, and the adhered first deposition layer and the second deposition layer fix the inkjet printing layer.

4. The printing method according to claim 3, wherein: The outer wall has an outer surface, and the line width of the second deposition layer is greater than the line width of the inkjet printing layer, so that the first deposition layer and the second deposition layer are in contact and adhered respectively on one side close to the outer surface and one side far from the outer surface of the inkjet printing layer.

5. The printing method according to claim 2, wherein: The printing of the inkjet printing layer includes: Printing the inkjet printing layer on the first deposition layer; The printing of the second deposition layer includes: Printing the second deposition layer on the inkjet printing layer, and curing at least the connection part between the second deposition layer and the inkjet printing layer, so that the first deposition layer and the second deposition layer fix the inkjet printing layer at the printing position of the inkjet printing layer.

6. The printing method according to claim 1, wherein: In the thickness direction of the outer wall, the first deposition layer and the inkjet printing layer are stacked, and the first deposition layer fixes the inkjet printing layer at the printing position of the inkjet printing layer.

7. The printing method according to claim 6, wherein: The printing of the first deposition layer includes: Printing a first inner deposition layer and a first outer deposition layer, and the first inner deposition layer and the first outer deposition layer are arranged side by side with a first preset gap; The printing of the inkjet printing layer includes: Filling the inkjet printing layer in the first preset gap, so that the first inner deposition layer and the first outer deposition layer fix the inkjet printing layer.

8. The printing method according to claim 7, wherein: The printing of the second deposition layer further includes: Covering the second deposition layer on the inkjet printing layer, and the second deposition layer is connected to the first inner deposition layer and the first outer deposition layer.

9. The printing method according to claim 1, characterized in that, Further comprising: Receive a print file, the print file including the outer wall trajectory of each layer in the model, the texture picture of the model, and the mapping relationship between the outer wall trajectory and the texture coordinates in the texture picture; The printing of the first deposition layer includes: Obtain the outer wall trajectory of the first deposition layer, and print the first deposition layer according to the outer wall trajectory of the first deposition layer; The printing of the inkjet printing layer includes: Generate print picture data corresponding to the first deposition layer from the texture picture according to the theoretical trajectory of the first deposition layer and the mapping relationship, and print the inkjet printing layer. The printing of the second deposition layer includes: Obtain the outer wall trajectory of the second deposition layer, and print the second deposition layer according to the outer wall trajectory of the second deposition layer.

10. A 3D component obtained by printing, the 3D component comprising an outer wall, characterized in that, The outer wall includes: A first deposition layer, at least part of which has light transmissivity; An inkjet printing layer, having a preset color and being stacked with the first deposition layer; A second deposition layer, at least part of which has light transmissivity and is stacked with the first deposition layer; Wherein, the first deposition layer and the second deposition layer fix the inkjet printing layer at the printing position of the inkjet printing layer, or, the first deposition layer fixes the inkjet printing layer at the printing position of the inkjet printing layer.

11. The 3D component according to claim 10, wherein The first deposition layer, the inkjet printing layer, and the second deposition layer are stacked, and the second deposition layer is At least partially in contact and adhered to the first deposition layer, and the adhered first deposition layer and second deposition layer fix the inkjet printing layer.

12. The 3D component according to claim 11, wherein The outer wall has an outer surface. In the thickness direction of the outer wall, the width of the first deposition layer is greater than the width of the inkjet printing layer, and the width of the second deposition layer is greater than the width of the inkjet printing layer, so that the first deposition layer and the second deposition layer are respectively in contact and adhered to the inkjet printing layer on the side close to the outer surface and the side far from the outer surface.

13. The 3D component according to claim 12, wherein In the thickness direction of the outer wall, the first deposition layer includes a first inner deposition layer and a first outer deposition layer that are stacked, and the inkjet printing layer is sandwiched between the first inner deposition layer and the first outer deposition layer, so that the first inner deposition layer and the first outer deposition layer fix the inkjet printing layer.

14. A 3D printer, characterized in that, Includes: A first nozzle for printing a deposition layer; A second nozzle for printing an inkjet printing layer; A processor for controlling the first nozzle and the second nozzle to execute the printing method according to any one of claims 1-9.

Images