WO2018201971A1 - Ensemble tête d'impression et système d'impression 3d - Google Patents

Ensemble tête d'impression et système d'impression 3d Download PDF

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Publication number
WO2018201971A1
WO2018201971A1 PCT/CN2018/084699 CN2018084699W WO2018201971A1 WO 2018201971 A1 WO2018201971 A1 WO 2018201971A1 CN 2018084699 W CN2018084699 W CN 2018084699W WO 2018201971 A1 WO2018201971 A1 WO 2018201971A1
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WIPO (PCT)
Prior art keywords
pixel
printhead assembly
main
main material
passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/084699
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English (en)
Chinese (zh)
Inventor
陈伟
陈晓坤
马达荣
蒋韦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhuhai Seine Technology Co Ltd
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Zhuhai Seine Technology Co Ltd
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Priority to JP2019547973A priority Critical patent/JP6820434B2/ja
Publication of WO2018201971A1 publication Critical patent/WO2018201971A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
    • B41J2/2135—Alignment of dots

Definitions

  • the present invention relates to the field of three-dimensional printing, and in particular to a print head assembly and a three-dimensional printing system.
  • three-dimensional printing in order to perform color printing, it is possible to mix with different colors of ink to express rich colors.
  • the method of three-dimensional color printing is similar to the two-dimensional printing method.
  • two-dimensional color inkjet printing when a color image is printed on a printing medium, a single-channel monochrome inkjet is performed according to the color of each pixel, and each pixel can be Accepts multi-channel multi-color matching ink drops.
  • a pixel can accept c, m, y, k, cm, cy, ck, my, mk, yk, cmy, cmk, cyk, myk, cmyk 15 kinds of color channel matching ink drops And convenient to achieve a variety of color printing work.
  • the target object is formed by stacking voxels, and the amount of material that each voxel can hold is a constant, that is, the height of each pixel point needs to be consistent, so one color is occupied in each color.
  • a three-dimensional inkjet color printer needs to perform a color color palette test on the basis of the existing three primary colors, and find out that all the colors that can be printed are of a uniform color as the color that can be expressed.
  • Printing that is to say, the 3D printer can express very rich colors, but due to the height problem of different colors after printing, the 3D printer can only select the color with the same height as the supported color, such as a pixel can print cm, Color drops of cy, ck, my, mk, yk or cmy, cmk, cyk, myk, etc.
  • transparent ink can be used to fill the portion of each voxel that is not filled with color ink, resulting in more color support.
  • the invention provides a print head assembly and a three-dimensional printing system, wherein the printed pixels have the same height and high printing precision.
  • the present invention provides a printhead assembly including at least two main material passages and at least one auxiliary material passage, the main material passages and the auxiliary material passages each having a spray hole spaced apart in a sub-scanning direction,
  • the orifices on the main material passages are offset from each other in the sub-scanning direction, and the orifices on the main material passages are correspondingly provided with orifices aligned in the main scanning direction on the auxiliary material passages.
  • the present invention provides a three-dimensional printing system comprising a material container and a printhead assembly as described above, the printhead assembly for layered printing, the material container comprising a primary material container and an auxiliary material container, a primary material The container is in communication with the main material passage in the printhead assembly, and the auxiliary material container is in communication with the auxiliary material passage in the printhead assembly.
  • the print head assembly includes at least two main material passages and at least one auxiliary material passage, and the main material passage and the auxiliary material passage have nozzle holes spaced apart in the sub-scanning direction, different main materials.
  • the orifices on the channels are offset from each other in the sub-scanning direction, and the orifices on the main material passages are correspondingly provided with orifices aligned in the main scanning direction on the auxiliary material passages.
  • FIG. 1 is a schematic structural view of a printhead assembly according to Embodiment 1 of the present invention.
  • FIG. 2a is a schematic view showing a deposition position of ink droplets in a pixel printed by the print head assembly of FIG. 1;
  • 2b is a schematic view showing the types of pixel points that can be printed by the print head assembly according to the first embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of another print head assembly according to Embodiment 2 of the present invention.
  • FIG. 3b is a schematic diagram showing the types of pixel points that can be printed by the print head assembly according to the second embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of still another print head assembly according to Embodiment 3 of the present invention.
  • FIG. 5 is a schematic structural diagram of a fourth type of print head assembly according to Embodiment 4 of the present invention.
  • FIG. 6 is a schematic structural diagram of a fifth type of print head assembly according to Embodiment 5 of the present invention.
  • 6b is a schematic view showing the types of pixel points that can be printed by the print head assembly according to Embodiment 5 of the present invention.
  • FIG. 7 is a schematic structural diagram of a sixth type of print head assembly according to Embodiment 6 of the present invention.
  • FIG. 8 is a schematic structural diagram of a three-dimensional printing system according to Embodiment 7 of the present invention.
  • FIG. 9 is a schematic structural view of a printhead assembly according to a first modification of the present invention.
  • the print head assembly provided in this embodiment includes at least two main material passages and at least one auxiliary material passage, wherein each main material passage corresponds to one auxiliary material passage, and the main material passage and the same
  • Each of the auxiliary material passages has an orifice arranged at intervals in the sub-scanning direction, the orifices on the different main material passages are offset from each other in the sub-scanning direction, and the orifices on the main material passage are in the auxiliary
  • the material passages are correspondingly provided with nozzle holes aligned in the main scanning direction.
  • the print head assembly is mainly used in a three-dimensional printing device or a three-dimensional printing system.
  • the print head assembly prints layer by layer, and in each layer printing process, the scanning of the layer is performed along the main scanning direction and the sub-scanning direction according to a certain rule.
  • the print head assembly is provided with at least two main material channels, and the two main material channels can eject ink droplets of different materials, such as inks of different colors, to perform printing effects of different materials, such as color printing effects.
  • the auxiliary material channel can generally eject transparent ink or white ink to eject transparent or white ink at the original position corresponding to the ink droplet of the main material channel when the ink droplet is not ejected in the main material channel, to the pixel point Filling is performed to avoid the situation where the pixel points are insufficient due to the small number of ink drops.
  • the orifices of the different main material channels are staggered in the sub-scanning direction.
  • the printhead of the printhead assembly moves along the main scanning direction and prints, the ink droplets ejected from the corresponding orifices of the different main material channels are deposited in different regions on the same pixel, and thus The phenomenon of ink droplet stacking and mixing does not occur in the pixel, the height is unified, and the effect of printing with a plurality of materials is realized at the same time.
  • the print head of the print head assembly is a two-channel print head, and two main material channels and auxiliary material channels are described as an example.
  • the print head assembly includes a print head 1x and a print head 1y.
  • Two main material passages Z1 and Z2 are disposed on the print head 1x, and two auxiliary material passages F1 and F2 are disposed on the print head 1y.
  • the orifices of the Z1 and F1 channels are aligned in the main scanning direction X
  • the orifices of Z2 and F2 are also aligned in the main scanning direction X; and the array of orifices of Z1 and Z2 are sequentially arranged along the main scanning direction X.
  • each of the main material channels and the auxiliary material channels corresponding to the main material channels deposit a total of at most one ink drop at the same pixel point during the ink jet printing process. Further, when each main material channel can deposit ink droplets on one pixel point, the auxiliary material channel corresponding to the main material channel does not deposit ink droplets on the pixel points; or, the main material channel does not deposit ink on the pixel points.
  • the auxiliary material channel corresponding to the main material channel deposits ink droplets at the pixel points.
  • the auxiliary material channel F1 does not deposit ink droplets in the pixel point;
  • the auxiliary material channel F1 deposits ink droplets at the pixel point; similarly, the working principle of the main material channel Z2 and the auxiliary material channel F2 and the main material channel Z1 and the auxiliary material channel F1 The principle of work is the same.
  • each material passage deposits at most one ink droplet in one molding pixel in one main scanning process, and it is molded at each shape.
  • the deposition position in the pixel is fixed, and Fig. 2a is a schematic view showing the deposition position of the ink droplets in the pixel dots printed by the print head assembly of Fig. 1.
  • the main material channels Z1 and Z2 deposit ink droplets in the same shaped pixel
  • the main material channel Z1 deposits an ink droplet at the position 21 in the shaped pixel
  • the bulk material channel Z2 is in the shaped pixel.
  • an ink droplet is deposited, that is, a tile arrangement; similarly, the positions where the auxiliary material channels F1 and F2 deposit ink droplets in the formed pixel point are also at the position 21 and the position 22, respectively.
  • FIG. 2b is a schematic diagram showing the types of pixel points that can be printed by the print head assembly according to the first embodiment of the present invention. As shown in FIG.
  • the number of ink drops that can be deposited in each shaped pixel is equal to the number of main material channels, and each column in the figure represents one pixel, and the circle represents the deposition position of the ink droplets, and the circle
  • the letters and numbers in the middle indicate the type of ink droplets deposited at this location.
  • the materials deposited by the main material channels Z1 and Z2 are different materials A and B, respectively, for example, A and B have different elastic properties and the like.
  • the auxiliary material will select a material P that can support the printing target object according to actual needs.
  • the materials printed by the auxiliary material channels F1 and F2 are the same material P, which are respectively designated as P1 for convenience of description. And P2.
  • the main material channel Z2 deposits an ink droplet B at the position 22 in the shaped pixel, and the corresponding auxiliary material channel F2 No ink drops are deposited in the shaped pixel, and the main material channel Z1 does not deposit ink droplets in the shaped pixel, and its corresponding auxiliary material channel F1 deposits an ink droplet P1 at the position 21 in the shaped pixel to fill the Forming pixel points; similarly, AB, AP2, and P1P2 pixels can also be obtained.
  • the number of ink drops that can be accommodated in each pixel is equal to the number of main material channels. After the main material channel and the corresponding auxiliary material channel are deposited with the ink droplets, the pixel can be filled.
  • the arrangement of the material channels can effectively avoid the overlapping of different ink droplets in the same pixel, so that the height of each pixel point is kept consistent, thereby ensuring the molding precision of the target object, and at the same time, simplifying the printing data in the three-dimensional printing system.
  • the print head assembly includes at least two main material passages and at least one auxiliary material passage, the main material passage and the auxiliary material passage have nozzle holes spaced apart in the sub-scanning direction, different from the main material.
  • the orifices on the channels are offset from each other in the sub-scanning direction, and the orifices on the main material passages are correspondingly provided with orifices aligned in the main scanning direction on the auxiliary material passages.
  • FIG. 3a is a schematic structural diagram of another print head assembly according to Embodiment 2 of the present invention. As shown in FIG. 3a, the difference between the embodiment and the first embodiment is that, in addition to the main material channels Z1, Z2 and F1 and F2 correspondingly disposed in the first embodiment, two auxiliary material channels F3 are disposed.
  • the auxiliary material passages F1, F2, F3 and F4 are sequentially arranged in the main scanning direction X, that is, the orifices thereof are sequentially arranged in the main scanning direction X, and are arranged in the sub-scanning direction Y.
  • the number of ink drops that can be deposited in each pixel is larger than the number of main material channels, that is, the number of types of main materials.
  • the working principle of the main material passages Z1, Z2 and the auxiliary material passages F1, F2 is the same as in the first embodiment, that is, the main material passage Z1 and the auxiliary material passage F1 selectively deposit ink at the position 31 in the formed pixel point.
  • the drops, main material channel Z2 and auxiliary material channel F2 selectively deposit ink drops at position 33 in the shaped pixel, while auxiliary material channels F3 and F4 deposit an ink drop at positions 32 and 34, respectively, in each shaped pixel.
  • the materials deposited by the main material channels Z1 and Z2 are different materials A and B, respectively, and A and B may be materials having different elastic properties, and the auxiliary materials are selected according to actual needs.
  • the material P capable of supporting the printing target object in fact, the materials printed by the auxiliary material channels F1, F2, F3 and F4 are the same material P, which are respectively defined as P1, P2, P3 and P4 for convenience of description.
  • FIG. 3b is a schematic diagram showing the types of pixel points that can be printed by the print head assembly according to the second embodiment of the present invention. As shown in the second column of pixels in Fig.
  • the main material channel Z2 deposits an ink droplet B at the position 33 in the shaped pixel, and the corresponding auxiliary material channel F2 No ink drops are deposited in the shaped pixel, and the main material channel Z1 does not deposit ink droplets in the shaped pixel, and its corresponding auxiliary material channel F1 deposits an ink droplet P1 at the position 31 in the shaped pixel, and the auxiliary material Channels F3 and F4 deposit an ink drop P3 and P4 at positions 32 and 34, respectively, in the shaped pixel.
  • auxiliary material channel needs to be added, and an additional auxiliary material channel needs to deposit an ink droplet in each molding pixel to fill the molding.
  • the pixel points can further improve the printing accuracy.
  • the printhead assembly further includes at least one auxiliary material passage, the area of the deposited ink droplets on the pixel points being different from the area of the ink droplets deposited by the main material passage.
  • the printhead in the printhead assembly can also be a single channel printhead.
  • 4 is a schematic structural view of still another print head assembly according to Embodiment 3 of the present invention. Compared with the first embodiment, the difference between the embodiment and the first embodiment is that in the embodiment, the four print heads are single-channel print heads.
  • the two print heads 4x are respectively disposed as the main material passages Z1 and Z2, and the two print heads 4y are respectively disposed as the auxiliary material passages F1 and F2, wherein the orifices of the Z1 and F1 passages are aligned in the main scanning direction X
  • the array of orifices of Z2 and F2 is also aligned in the main scanning direction X, and the orifices of Z1 and Z2 are sequentially arranged in the main scanning direction X, but are displaced in the sub-scanning direction Y, and F1 and F2 are the same.
  • the working principle of each material channel is the same as that in the first embodiment.
  • the print head in the print head assembly is a single-channel print head
  • the misalignment arrangement of the spray holes in the sub-scanning direction Y is realized by mechanical assembly.
  • the present embodiment can reduce the manufacturing requirements of the print head and reduce the machine cost, but it is required to ensure high assembly precision.
  • the printhead in the printhead assembly can also be a single channel printhead. In this way, the manufacturing requirements and structural complexity of the print head are low, which reduces the manufacturing cost.
  • FIG. 5 is a schematic structural diagram of a fourth type of print head assembly according to Embodiment 4 of the present invention. As shown in FIG. 5, the difference between the embodiment and the first embodiment is that, in order to perform the discharge printing of the support material, the print head assembly further includes at least one support material passage, and the support material passage is used for the discharge. The support material removed after printing is complete.
  • the support material passage for ejecting the support material may be located on the same print head as the main material passage or the auxiliary material passage, or the support material passage may be located on a separate print head.
  • an independent print head 5z is added in the main scanning direction X, and the print head 5z includes a support material passage S as an example for description.
  • the support material in this embodiment may be selected to be any material s capable of supporting the printing of the target object and being able to be peeled off from the target object.
  • a support material passage S is disposed corresponding to the main material passage Z1.
  • the support material passage S deposits a support material ink droplet s at a position 51 in the support pixel point, and the auxiliary material passage F2 An auxiliary material ink droplet P2 is deposited at a position 52 within the supporting pixel to effect printing of the support structure.
  • the size of the ink droplets deposited by the support material channel is variable. Therefore, in the embodiment, the printing of the support structure can also be realized by changing the size of the ink droplet deposited on the support material channel S, that is, a large ink droplet s is deposited in the supporting pixel to fill the supporting pixel. It should be understood by those skilled in the art that the manner of setting the support material channel in the present invention is not limited thereto, and may be any manner capable of realizing printing of the support structure.
  • the printhead assembly further includes at least one support material passage for ejecting the support material that can be removed after printing is completed. This enables the support material to be filled in the object to be printed to form a support structure for supporting the object to be printed, and removed after the object to be printed is molded.
  • FIG. 6 is a schematic structural diagram of a fifth type of print head assembly according to Embodiment 5 of the present invention.
  • a material channel setting manner of a full-color inkjet three-dimensional printer is specifically described.
  • the main material used in the embodiment is four color materials of cyan material c, magenta material m, yellow material y and black material k, and the auxiliary material is white material w.
  • the auxiliary material of the example may also be a transparent material or a light colored material. As shown in FIG.
  • the main material channel of the print head 6x includes four color material channels C, M, Y, and K for depositing cyan material c, magenta material m, yellow material y, and black material k, respectively.
  • the 6y auxiliary material channel includes four white material channels CW, MW, YW, KW, and the above white material channels CW, MW, YW, KW and color material channels C, M, Y, K are in the main scanning direction X.
  • Corresponding arrangement, and the array of four color material channels C, M, Y, K are arranged offset in the sub-scanning direction Y.
  • the array of four white material channels CW, MW, YW, KW is in the array.
  • the sub-scanning direction Y is also misaligned.
  • a certain formed pixel point can accept c, m, y, k, cm, cy, ck, my, mk, yk, cmy, cmk, cyk, myk.
  • cmyk 15 kinds of color matching ink droplets in addition, the molding pixel points may not include any color material ink droplets, but simply formed of white material.
  • the number of ink drops that can be deposited in each of the shaped pixel points is equal to the number of main material types, that is, four ink drops can be deposited in each of the formed pixel points, and FIG.
  • FIG. 6b is a print head assembly provided in Embodiment 5 of the present invention.
  • Figure 6b shows a combination of 16 materials, each column representing a pixel, each circle representing the location of a drop deposition, the letter in the circle indicating the type of drop deposited at that location, for example, as shown in column 1.
  • Pixels indicate that only four white ink drops are deposited in the pixel; the pixels shown in the second column to the fifth column indicate that one dot and three white ink droplets of a single color are respectively deposited in the pixel, that is,
  • the colors displayed by the pixels are cyan, magenta, yellow, and black; the pixels shown in columns 6 through 11 indicate that two ink droplets and two white ink droplets of different colors are deposited in the pixel.
  • the color displayed by the pixel is the combination of the two color ink droplet colors; the pixel points shown in the 12th column to the 15th column indicate that three ink droplets and one white ink of different colors are respectively deposited in the pixel.
  • the color displayed by the pixel is a combination of three color ink colors; the pixel shown in column 16 indicates that four ink droplets of different colors are deposited in the pixel, and the color of the pixel is shown. The four color ink drops The combination.
  • each material passage deposits at most one ink in one molding pixel in one main scanning process. Dropping, and the position at which each material channel deposits ink droplets in the shaped pixel is fixed.
  • the cyan material channel C may deposit a cyan ink droplet c at a position 61 in the shaped pixel
  • the yellow material channel Y may be A yellow ink droplet y is deposited at a location 62 in the shaped pixel
  • a magenta material channel M can deposit a magenta ink droplet m at a location 63 in the shaped pixel
  • the black material channel K can be located in the shaped pixel
  • a black ink droplet k is deposited at 64.
  • the deposition positions of the white material passages CW, YW, MW and KW corresponding to the color material passages C, M, Y, and K in the formed pixel points are also 61, 62, 63, and 64, respectively.
  • each color material channel corresponds to a white material channel
  • the corresponding white material channel deposits white ink droplets at corresponding positions.
  • the cyan material channel C deposits a cyan ink droplet c at the position 61 in the pixel, due to the white material.
  • the arrangement of the orifice array of the channel is consistent with the corresponding orifice array of the color material passage, and the white material MW, YW, KW corresponding to the magenta material passage M, the yellow material passage Y, and the black material passage K are identical.
  • the channel respectively deposits a white ink droplet w at the corresponding position 62, 63, 64 of the pixel to fill the pixel, so that ink droplets w do not overlap with the ink droplet c or droplets deposited in different channels do not occur.
  • the phenomenon of overlapping w so as to ensure that the height of each formed pixel is consistent, can also effectively avoid the ink droplets covering and cause color loss.
  • the embodiment may further include at least one support material passage.
  • the present invention has no specific requirements on the manner of setting the support material passage, as long as the support structure can be printed and the support requirements can be met.
  • a print head 6z is disposed in the main scanning direction X, and the print head 6z includes four support material channels S1, S2, S3, and S4, and four
  • the support material passages are respectively corresponding to the color material passages, and the orifice arrangement is also arranged in the same manner as the orifice arrangement of the main material, that is, sequentially arranged in the main scanning direction X, and arranged in the sub-scanning direction Y.
  • the support material channels S1, S2, S3, S4 may each deposit a support material ink drop at locations 61, 62, 63, 64 in one of the support pixel points to form a support structure to provide support for the target object.
  • the printhead assembly includes at least two main material passages and at least two auxiliary material passages, the main material passage and the auxiliary material passage have at least one injection hole spaced apart in the sub-scanning direction, and each main material The passage corresponds to an auxiliary material passage, and the orifices on the different main material passages are staggered in the sub-scanning direction, and the orifices of each of the main material passages are aligned with the orifices on the auxiliary material passage corresponding to the main material passages. Aligned along the main scanning direction, the ink droplets deposited on the corresponding orifices on different main material channels are located in different areas on the same pixel.
  • the main material is a different color material, so that the rich printing color can be realized by the combination of different main materials, and in the printing, different ink drops can be staggered and deposited in different regions of the same pixel, thereby avoiding the same pixel.
  • the overlapping of different ink droplets makes the height of each pixel point consistent, thus ensuring the precision in three-dimensional color printing and avoiding the color loss caused by overlapping and mixing of different ink droplets.
  • FIG. 7 is a schematic structural diagram of a sixth type of print head assembly according to Embodiment 6 of the present invention. As shown in FIG. 7 , similar to the foregoing embodiment 5, the embodiment further provides a material channel setting manner of a full-color inkjet three-dimensional printer.
  • the difference between the present embodiment and the fifth embodiment is that
  • the main materials used in the embodiment are three color materials of cyan material c, magenta material m and yellow material y, and the support material channels S1 and S2 are correspondingly arranged in the main scanning direction X, and the auxiliary material is still selected as the white material w,
  • the auxiliary material according to the embodiment may also be a transparent material or a light color material.
  • the print head 7x includes three color material passages C, M, Y and a support material passage S1 for depositing a cyan material c, a magenta material m, a yellow material y, and a support material s, respectively.
  • the 7y includes three white material channels CW, MW, YW and one support material channel S2.
  • the color material passages C, M, Y, the support material passage S1, and the white material passages CW, MW, YW, and the support material passage S2 are arranged one-to-one in the main scanning direction X, and the three color material passages C, M,
  • the array of nozzle holes of Y and the support material channel S1 are arranged offset in the sub-scanning direction Y.
  • the array of nozzle holes of the three white material channels CW, MW, YW and the support material channel S2 are also misaligned in the sub-scanning direction Y. cloth.
  • the deposition manner of the ink droplets in each of the formed pixel points is similar to that of the ink droplet deposition method in the fifth embodiment, that is, the corresponding material passages C and CW, M and MW, Y, respectively.
  • the manner of depositing the ink droplets in the supporting pixel may be any manner capable of forming a support structure and supporting printing of the target object, for example, in this embodiment
  • Two ink droplets s or three ink droplets w may be deposited in the supporting pixel to provide support, and the supporting pixel dots deposited with two ink droplets s are usually located at the junction of the molding structure and the supporting structure, facilitating the supporting structure. Peeling, while supporting pixel dots deposited with three ink drops w are typically located inside the support structure to enhance the strength of the support structure to provide better support.
  • the support material passages in the printhead assembly may also be disposed on the same printhead as the main material passage or the auxiliary material passage.
  • the support material ejected from the support material passage can be filled in the object to be printed to form a support structure for supporting the object to be printed, and removed after the object to be printed is formed.
  • FIG. 8 is a schematic structural diagram of a three-dimensional printing system according to Embodiment 7 of the present invention.
  • the embodiment provides a three-dimensional printing system including a material container and a print head assembly as described in the foregoing embodiments, the print head assembly for performing layered printing, the material container including a main material container and The auxiliary material container is in communication with the main material passage in the main material container and the printhead assembly, and the auxiliary material container and the auxiliary material passage in the printhead assembly are in communication.
  • the three-dimensional printing system generally further includes a control unit for layering the object to be printed and transmitting the layer print data to the print head assembly to make the print head assembly according to the layer.
  • Print data for layered printing may include a processor 1 and a controller 2, and the processor 1 may be configured to layer the target object, that is, the object to be printed, and acquire layer print data based on structural information and non-structural information of the target object.
  • the print data includes layer structure data including layer structure data and support structure data, and layer unstructured data including color data or material property data.
  • the controller 2 can then control the printhead assembly 6 to eject the printed material based on the layer print data of the target object; the material path of the printhead assembly 6 is set based on the aforementioned material channel arrangement, and FIG. 6a shows the specific arrangement of the material passage of the present embodiment.
  • the method is specifically described in the fifth embodiment, and details are not described herein.
  • the three-dimensional printing system can further include a support material container in communication with the support material channel in the printhead assembly.
  • a support material container in communication with the support material channel in the printhead assembly.
  • the material container 3 in Fig. 8 may specifically include a body material container 3a-3d, an auxiliary material container 3e and a support material container 3f, a material conduit 4, a guide rail 5, and a print head assembly 6 including print heads 6x, 6y and 6z.
  • the number of containers of the same material in the present invention is not limited, and the same container can supply ink to a plurality of material passages.
  • the same main material containers are each set to one, and the auxiliary material container and the support material container are each set to one. .
  • the main material containers 3a, 3b, 3c, 3d respectively store a cyan material c, a magenta material m, a yellow material y and a black material k, respectively supplying ink to the main material channels C, M, Y, K of the print head 6x;
  • the auxiliary material container 3e stores the white material w while supplying ink to the auxiliary material passages CW, MW, YW, KW of the print head 6y;
  • the support material container 3f stores the support material s while giving the support material passages S1, S2 of the print head 6z S3, S4 ink supply.
  • the three-dimensional printing system further includes a lifting device 9 and a supporting platform 8 for supporting an object to be printed, and the lifting device 9 is used to complete each of the printing head assemblies 6 After the layered printing of the layers, the height of the support platform 8 is lowered to cause the printhead assembly 6 to perform the next layer of printing.
  • the three-dimensional printing system is also provided with a base 10.
  • the processor 1 layeres the target object, and obtains layer print data based on the structural information and the non-structural information of the target object, and the controller 2 controls the print heads 6x and 6y to print based on the layer print data.
  • the ink droplets are deposited on the support platform 8 to form a layer forming structure.
  • the controller 2 controls the printing head 6z to perform printing based on the layer print data, and deposits ink droplets on the support platform 8 to form a layer supporting structure.
  • four ink drops are deposited in each pixel, and the specific deposition methods of the main material and the auxiliary material are shown in FIG.
  • the main material channel C deposits an ink droplet c at 61
  • the auxiliary material channel YW deposits an ink droplet w at 62
  • the auxiliary material channel MW deposits an ink droplet w at 63
  • the KW deposits an ink droplet w at 64, while the auxiliary material passage CW and the main material passages Y, M and K do not deposit ink droplets.
  • the deposition method of the support material is not specifically required in the present invention, and can support the printing of the target object.
  • the three-dimensional printing system may further include a curing device for curing the object to be printed.
  • the curing device is two, and the two curing devices 7a and 7b are respectively mounted on the two of the printing head assembly 6.
  • the printhead assembly 6 and the curing devices 7a and 7b are both mounted on the guide rail 5 and reciprocable along the guide rail.
  • the curing devices 7a and 7b can operate simultaneously or alternately to cure each layer of deposited material to form a layer of three-dimensional objects.
  • the controller 2 controls the lifting device 9 to descend to a certain height, and continues to print the layers, and finally a plurality of layers are superposed to form the target object.
  • the three-dimensional printing system includes at least two material containers and a print head assembly as described in the foregoing embodiments, the print head assembly is used for layer printing, and at least two material containers include a main material container and an auxiliary material container.
  • the main material container is in communication with the main material passage in the printhead assembly
  • the auxiliary material container is in communication with the auxiliary material passage in the printhead assembly.
  • the printhead assembly of the present modification includes at least two main material passages and at least one auxiliary material passage, wherein the plurality of main material passages only correspond to Providing an auxiliary material passage, the main material passage and the auxiliary material passage having nozzle holes spaced apart in a sub-scanning direction, wherein the nozzle holes on the main material passages are staggered in the sub-scanning direction, and
  • the auxiliary material passage is provided with an injection hole aligned with the plurality of main material passage orifices in the main scanning direction; specifically, the print head assembly shown in FIG. 9 includes two main material passages Z1 And Z2 and an auxiliary material passage F comprising orifice arrays f1 and f2 aligned with the array of orifices on the main material passages Z1, Z2, respectively, in the main scanning direction.
  • the number of ink drops that can be deposited in each of the formed pixel points is equal to the number of main material channels, and each column in the figure represents one pixel point, and the circle represents the deposition position of the ink droplets.
  • the letters and numbers in the circle indicate the type of ink drop deposited at that location.
  • the materials deposited by the main material passages Z1 and Z2 are different materials A and B, respectively, for example, A and B have different elastic properties and the like.
  • the auxiliary material will select a material P that can support the printing target object according to actual needs.
  • the materials printed by the auxiliary material channels F1 and F2 are the same material P, which are respectively defined as P1 for convenience of description. And P2.
  • the main material channel Z2 deposits an ink droplet B at the position 22 in the shaped pixel, and the main material
  • the orifice array f2 on the auxiliary material channel F corresponding to the channel Z2 does not deposit ink droplets in the shaped pixel, and the main material channel Z1 does not deposit ink droplets in the shaped pixel, and the corresponding auxiliary material F
  • the orifice array f1 deposits an ink droplet P1 at the position 21 in the shaped pixel to fill the shaped pixel; similarly, AB, AP2 and P1P2 pixels can be obtained.
  • different ink droplets can be staggered and deposited in different regions of the same pixel, thereby avoiding overlapping of different ink droplets in the same pixel, so that the height of each pixel is consistent. Guarantee the accuracy of 3D printing and avoid the color loss caused by overlapping and mixing of different ink droplets; in addition, it can simplify the calculation of data format, as long as the material composition of the pixel is calculated, it is missing for each pixel.
  • the main material channel can be supplemented with corresponding auxiliary materials.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

La présente invention concerne un ensemble tête d'impression et un système d'impression 3D. L'ensemble tête d'impression comprend au moins deux canaux de matériau principaux (Z1, Z2) et au moins un canal de matériau auxiliaire (F1, F2), les canaux de matériau principaux (Z1, Z2) et les canaux de matériau auxiliaires (F1, F2) sont tous munis de trous de pulvérisation disposés à des intervalles le long d'un sens de sous-balayage (Y), les trous de pulvérisation sur différents canaux de matériau principaux (Z1, Z2) étant étagés dans le sens de sous-balayage (Y), et les canaux de matériau auxiliaires (F1, F2) étant disposés de manière correspondante avec des trous de pulvérisation disposés le long d'un sens de balayage principal (X) et étant alignés aux trous de pulvérisation sur les canaux de matériau principaux (Z1, Z2). La hauteur des points de pixel imprimés est cohérente, et la précision d'impression est élevée.
PCT/CN2018/084699 2017-05-03 2018-04-26 Ensemble tête d'impression et système d'impression 3d Ceased WO2018201971A1 (fr)

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CN201710305849.3A CN107471826B (zh) 2017-05-03 2017-05-03 打印头组件及三维打印系统

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CN109304872B (zh) * 2018-11-14 2020-03-24 珠海赛纳打印科技股份有限公司 三维打印方法和三维打印装置
JP7735134B2 (ja) * 2021-09-21 2025-09-08 株式会社ミマキエンジニアリング 造形装置のメンテナンス方法
CN116080064B (zh) * 2022-03-11 2025-08-01 珠海赛纳三维科技有限公司 三维物体打印方法及装置、三维打印材料

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CN107471826B (zh) 2018-06-01

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