Lamination manufacturing equipment

Abstract

The utility model discloses lamination manufacturing equipment, which is mainly characterized in that a spraying reinforcement mode is adopted, so that the color of a single-layer model is flexible, and the printing process is cleaner and more convenient. According to the main technical scheme, the lamination manufacturing equipment comprises a forming platform, the printing head assemblies are used for spraying various to-be-cured materials to the forming platform; the moving mechanism is connected with the printing head assembly and used for driving the printing head assembly to move relative to the forming platform; and the curing light source is used for projecting curing light to the forming platform so as to cure the to-be-cured material. The 3D printer is mainly used for 3D printing.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a laminate manufacturing device. Background Art

[0002] Common 3D printers include FDM printers and light-curing printers. In FDM printers, the consumables are fed in filament form, melted by the print head, and sprayed on the molding platform to achieve three-dimensional printing. However, the consumables are of a single color. If color printing is required, the consumables need to be replaced, which is cumbersome to operate, and can only achieve color change in the height direction. In light-curing printers, the material tank contains liquid resin, and the light source and the printing platform are distributed on both sides of the material tank. The light source is used to illuminate the resin between the printing platform and the release film with a preset contour for curing. When performing color printing, it is necessary to prepare multiple material tanks to hold resins of different colors, so that when printing different layers, the material tanks need to be replaced for printing to achieve the change of model molding color. The printing steps are cumbersome, and the model and molding platform need to be immersed in liquid resin, so that both the printing equipment and the model need to be cleaned, and the user experience is poor.

[0003] Therefore, finding a more flexible and convenient color printing method has become an urgent problem to be solved. Utility Model Content

[0004] In view of this, in order to solve at least one of the aforementioned technical problems, the utility model provides a laminate manufacturing device.

[0005] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0006] The utility model provides a lamination manufacturing device, comprising:

[0007] Forming platform;

[0008] at least one print head assembly, the print head assembly being used to spray a plurality of materials to be cured onto the forming platform;

[0009] A moving mechanism, the moving mechanism is connected to the print head assembly and is used to drive the print head assembly to move relative to the forming platform;

[0010] At least one curing light source is used to project curing light onto the molding platform to cure the material to be cured.

[0011] The utility model proposes a lamination manufacturing device, which mainly adopts the method of spraying and curing, so that the color of the single-layer model is flexible, and the printing process is cleaner and more convenient. In the prior art, the color of the consumables of FDM printers is single. If color printing is required, the consumables need to be replaced, the operation is cumbersome, and the color change can only be achieved in the printing height direction. When the light-curing printer performs color printing, it is necessary to replace the material tank or resin. The printing steps are cumbersome, and the printing equipment and the model need to be cleaned, and the user experience is poor. Compared with the prior art, in this application document, the sprayed resin is moved by the print head assembly, so that a sprayed layer can be a variety of colors, the color of the single-layer model can be flexibly controlled, and then the curing light source is used to cure the resin to form a layer of the model, realizing flexible color changes while the printing process is convenient and simple. In addition, the printing platform and the model do not need to be immersed in the resin, and the pre-printing and post-printing processing operations are simpler, which has the advantages of both traditional light-curing printing and FDM printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic cross-sectional structure diagram of a laminate manufacturing device provided by an embodiment of the utility model at a first viewing angle;

[0013] Figure 2 A schematic cross-sectional structure diagram of a laminate manufacturing device provided by an embodiment of the utility model at a second viewing angle;

[0014] Figure 3 A three-dimensional structural schematic diagram of a laminate manufacturing device provided by an embodiment of the utility model;

[0015] Figure 4 A schematic diagram of the three-dimensional structure of a print head assembly in a laminate manufacturing device provided by an embodiment of the utility model;

[0016] Figure 5 A schematic cross-sectional view of a print head assembly in a laminate manufacturing device provided by an embodiment of the utility model;

[0017] Figure 6 A schematic diagram of the structure of a horizontal driving mechanism in a laminate manufacturing device provided by an embodiment of the utility model;

[0018] Figure 7 A schematic structural diagram of a vertical drive mechanism in a laminate manufacturing device provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0019] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the specific implementation method, structure, characteristics and effects of the laminated manufacturing equipment proposed by the utility model are described in detail below in combination with the accompanying drawings and preferred embodiments. For the convenience of description, the light emitted by the light source is described in the form of light rays.

[0020] On the one hand, if Figure 1-3 As shown, the embodiment of the utility model provides a lamination manufacturing device, comprising:

[0021] Forming platform 100;

[0022] At least one print head assembly 200, the print head assembly 200 is used to spray a variety of materials to be cured onto the molding platform 100;

[0023] The moving mechanism 300 is connected to the print head assembly 200 and is used to drive the print head assembly 200 to move relative to the molding platform 100;

[0024] At least one curing light source 400 is used to project curing light at least to the molding platform 100 to cure the material to be cured.

[0025] The molding platform 100 may be generally plate-shaped as a whole and include a top plane, which is used to be opposite to the print head assembly 200 to connect and support the model. The molding platform 100 may be in various shapes, such as round, square, etc. A surface of a material that helps the printing resin adhere may be laid on the molding platform 100, such as a detachable spring steel plate. After printing, the spring steel plate can be removed and bent to facilitate demoulding of the model.

[0026] The multiple materials to be cured can be multiple resins. The print head assembly 200 can be one or more, and a single print head assembly 200 can spray resins of multiple colors, or in one embodiment, the print head assembly 200 adopts the CMYK color principle for spraying, and can be based on several limited colors of resins for color matching, so as to achieve full-color printing. Alternatively, in some other embodiments, the print head assembly 200 can also spray resins of different materials, such as transparent resins or opaque resins, such as resins of different hardness after curing. Alternatively, in some embodiments, the material to be cured can also be other viscous materials.

[0027] The moving mechanism 300 can be in various forms, and can only drive the print head assembly 200 and the molding platform 100 to move at least in the direction of approaching or moving away from each other. For example, the print head assembly 200 can spray resin in a predetermined area on the molding platform 100 at a fixed position, such as spraying a square area or a circular area, which is related to the number and layout range of the discharge ports of the print head assembly 200. If the cross-sectional range of the model is smaller than the range of the predetermined area, the print head assembly 200 and the molding platform 100 can only be driven to move closer to or farther from each other, so as to achieve superposition in the height direction and complete the model printing. Alternatively, in some embodiments, the discharge port of the print head assembly 200 can be approximately regarded as a point, and in order to print a model with a larger cross-sectional area, the print head assembly 200 needs to be moved relative to the molding platform 100 in a plane parallel to the upper surface of the molding platform 100, so as to achieve the spraying of a complete layer of the model by moving spraying. The moving mechanism 300 is used to drive the print head assembly 200 to move and spray along the physical contour of the current solidified layer of the model to be printed.

[0028] The moving mechanism 300 can be connected to the print head assembly 200 so that the print head assembly 200 moves actively, and the print head assembly 200 moves relative to the molding platform 100 through the active movement of the print head assembly 200. It can also be connected to the molding platform 100 so that the molding platform 100 moves actively. Alternatively, the moving mechanism 300 can be connected to the print head assembly 200 and the molding platform 100 at the same time to realize the movement of the print head assembly 200 relative to the molding platform 100. The structure of the moving mechanism 300 will be described in more detail later.

[0029] The spraying area of ​​the print head assembly 200 may be only within the molding range of the current layer model, or may be beyond the range of the current layer model, which can be determined according to the complexity of the actual model, the difficulty of controlling the moving structure, or the material of the resin, such as fluidity. In one embodiment, the print head assembly 200 is used to spray a plurality of materials to be cured to the first spraying range of the molding platform 100 according to the color information of the current curing layer, and the curing light source 400 is used to project curing light to the materials to be cured in the first curing range to cure the materials to be cured and form the current curing layer. Among them, the first spraying range includes the first curing range, and the first spraying range is larger than the first curing range. That is, the curing light source 400 is used to project pattern curing light to the molding platform 100 to selectively cure the materials to be cured. The first curing range is the area range of the physical contour of the current curing layer, that is, the area where the current curing layer actually needs to be molded. The pattern projection control of the light contour is more precise than the motor motion control of the spraying position of the print head assembly 200, and is less susceptible to error interference such as vibration. In summary, the above embodiments spray a wide range of resin through the print head assembly 200, and then use the curing light to cure the part of the resin in the wide range that conforms to the contour of the model of this layer, and selectively cure through pattern light, so that the model molding accuracy is higher than the molding accuracy of the FDM printer. In some embodiments, the first spraying range is formed by expanding the area of ​​the solid contour of the current solidified layer by a fourth preset distance. The fourth preset distance can be 0.3 mm, 0.5 mm, etc., thereby ensuring that a sufficient area of ​​the resin spraying area is provided, avoiding the loss of the model due to insufficient spraying of the nozzle, and will not waste resin and will not significantly extend the spraying time.

[0030] In one embodiment, the resin may be a liquid resin or a gel resin, and the gel resin is a medium-high viscosity liquid or solid-liquid mixed slurry. Compared with ordinary resins, the gel resin has greater viscosity and weaker fluidity. After spraying, it is not easy to overflow or move, thereby ensuring the molding accuracy and cleanliness of the printing process.

[0031] The resin is a photocurable resin, which can undergo a polymerization reaction under light of a specific color or wavelength, and then be cured and formed. The curing light source 400 is used to uniformly cure a layer of resin after it is sprayed, or it can be sprayed and cured at the same time. The curing light source 400 can adopt various forms of light sources, aiming to enable the resin sprayed on this layer to be formed according to the contour of the model on this layer. The curing process will be described in detail in conjunction with a more specific curing light source 400 later. After a layer of model is sprayed and cured, the resin corresponding to the second layer of the model is sprayed on the basis of the first layer of the model, and then the resin is cured again, and this cycle is repeated to achieve layer-by-layer superposition to form a three-dimensional model.

[0032] The utility model embodiment proposes a lamination manufacturing device, which mainly adopts the method of spraying and curing, so that the color of the single-layer model is flexible, and the printing process is cleaner and more convenient. In the prior art, the color of the consumables of the FDM printer is single. If color printing is required, the consumables need to be replaced, the operation is cumbersome, and the color change can only be achieved in the printing height direction. When the light-curing printer performs color printing, the material tank or resin needs to be replaced. The printing steps are cumbersome, and the printing equipment and the model need to be cleaned, and the user experience is poor. Compared with the prior art, in the present application document, the resin is sprayed by moving the print head assembly, so that a layer of the spray can be a variety of colors, and the color of the single-layer model can be flexibly controlled, and then the resin is cured by a curing light source to form a layer of the model. While achieving flexible color changes, the printing process is convenient and simple. After fine spraying of a variety of materials to be cured, light curing molding is performed. Compared with the deposition of molten filamentary consumables, the model has higher precision. In addition, the printing platform and the model do not need to be immersed in the resin, and the pre-printing and post-printing processing operations are simpler, which has the advantages of both traditional light-curing printing and FDM printing.

[0033] The print head assembly 200 can be used to export the resin in a variety of ways. For example, the additive manufacturing device also includes a silo 510. The material to be cured stored in the silo 510 enters the print head assembly 200 through the feed port of the print head assembly 200. The print head assembly 200 is provided with a discharge port 212 on the side facing the molding platform 100. The print head assembly 200 is provided with one or more discharge channels 211 connecting the feed port and the discharge port 212. Then, the material to be cured stored in the silo 510 can be discharged onto the molding platform 100 through the feed port, the discharge channel 211 and the discharge port 212 in sequence to achieve spraying. The silo 510 can be independent of the print head assembly 200 and can be connected to the print head assembly 200 through a hose. The silo 510 can be set away from the print head assembly 200 at a convenient location for filling; or, it can be independent of the print head assembly 200 and set near the print head assembly 200, so that the transmission of the material to be cured is faster. Alternatively, the material bin 510 can be connected to the print head assembly 200. Optionally, a main material box can be provided, which is independent of the print head assembly 200 and can be provided at a position far from the print head to facilitate the supply of the material to be cured. The material bin 510 is provided on the print head assembly 200 or at a position close to the print head assembly 200, and can be used as a secondary material box. During printing, the material to be cured in the main material box is first transferred to the material bin 510, and the print head assembly 200 obtains the material to be cured from the closer material bin 510 during spraying, thereby improving the transfer efficiency, and can play a buffering role in the material change gap when the material is cut off, so that the print head assembly 200 will not cut off the material.

[0034] There can be various corresponding relationships between the silo 510, the feed port, the discharge channel 211 and the discharge port 212, so as to realize different ways of transmitting the material to be cured. Two preferred implementations are given below:

[0035] In the first embodiment, in at least one discharge channel 211, the feed port 212 is connected to a first number of silos 510, and the discharge port 212 has a second number, wherein the first number and the second number are equal, that is, one silo 510 corresponds to one discharge port 212, that is, one discharge port 212 only corresponds to spraying one resin, such as a resin of one color and material, and the number of discharge channels 211 between the corresponding pair of silos 510 and the discharge port 212 can be one or more, such as the first number, the first number of discharge channels 211 are not interconnected, and each discharge channel 211 is used to transfer resin separately, and then when an individual discharge channel 211 fails, other discharge channels 211 can be relied on for resin transfer to ensure that the printing process will not be affected.

[0036] Optionally, a trigger 220 may be provided on the discharge channel 211, and at least a portion of the section of the discharge channel 211 from the trigger 220 to the discharge port 212 has a tendency to reduce its cross section, thereby causing the flow rate of the resin to have a tendency to accelerate, and the resin can be smoothly sprayed from the discharge port 212 under the action of the trigger 220. The specific implementation of the trigger 220 will be described in detail later. Take the case where multiple discharge channels 211 are independent of each other, one discharge channel 211 corresponds to the supply of a resin, such as a resin of a color, and multiple discharge channels 211 can correspond to the same color of resin. For example, the color of the resin can be black, white, red, yellow, blue; or white, cyan, magenta, yellow, black, etc. In the embodiment where the color of the resin is white, cyan, magenta, yellow, and black, the number of discharge channels 211 can be five, corresponding to the supply devices for connecting white, cyan, magenta, yellow, and black resins, respectively.

[0037] In the second embodiment, the first number is a third number times the second number, and the third number is a positive integer. That is, one discharge port 212 corresponds to multiple silos 510, and one discharge port 212 can spray the resin in multiple silos 510. The resin corresponding to a single discharge port 212 can be the same resin, so that even if an individual silo 510 is out of material or blocked, the remaining silos 510 can be fed normally; or, the resin corresponding to a single discharge port 212 can be different resins, such as resins of different colors or materials. Optionally, the discharge channel 211 is sequentially provided with multiple triggers 220 and a fusion chamber along the direction from the feed port to the discharge port 212. The trigger 220 is triggered to control the material to be cured to enter the discharge channel 211 and the fusion chamber from the silo 510. The section of the fusion chamber close to the discharge port 212 has a tendency of reducing the cross section. Multiple triggers 220 can be respectively provided on multiple discharge channels 211, and one or more triggers 220 can be provided on multiple discharge channels 211. Multiple discharge channels 211 are all connected to a fusion chamber. By controlling the trigger 220 corresponding to the discharge channel 211, it is possible to add resins of different colors or materials to the fusion chamber, and then mix the resins in the fusion chamber in advance and then output them from the discharge port, or to add inks of different colors and main material resins to the fusion chamber, and then mix the resins in the fusion chamber in advance and then output them from the discharge port. In some embodiments, a stirring mechanism, such as a vibrating rod or a fan blade, is also provided in the fusion chamber to achieve full fusion of the resins through stirring.

[0038] The trigger 220 may be an electronic valve, and the discharge channel 211 is also connected to a pressurizer. The electronic valve is located on the communication path between the pressurizer and the discharge channel 211, and then the discharge channel 211 can be pressurized by opening the electronic valve, and then the resin in the discharge channel 211 is squeezed out. Alternatively, in one embodiment, the trigger 220 is a pressure discharge member, and the trigger 220 at least includes a pressure discharge end, and the pressure discharge end is located in the discharge channel 211. The trigger 220 includes at least a part of the structure of the pressure discharge end for moving under external drive to intermittently approach or move away from the discharge port 212, so as to squeeze the resin in the discharge channel 211 through the discharge port 212 to the molding platform 100.

[0039] The trigger 220 is disposed corresponding to the discharge channel 211 and is used to move relative to the discharge port 212 by means of electric drive or gas drive, so as to extrude the resin in the discharge channel 211. Figure 5As shown, the discharge channel 211 includes a first section channel 2111, a dripping chamber 2112 and a second section flow channel 2113 which are connected in sequence. The first section channel 2111 is used to connect an external liquid supply device. The dripping chamber 2112 is a chamber with a cross-section larger than the first section channel 2111 and the second section flow channel 2113. The second section flow channel 2113 extends to the discharge port 212. The pressure discharge end of the trigger 220 is located in the dripping chamber 2112. The resin enters from the first section channel 2111 and then flows into the dripping chamber 2112. The trigger 220 is used to rise and fall. When the trigger 220 rises, the resin automatically flows into the dripping chamber 2112 for liquid replenishment. When the trigger 220 falls, the resin in the dripping chamber 2112 is pushed out, and then the resin is sprayed out along the second section flow channel 2113 and the discharge port 212. The dripping chamber 2112 plays the role of gathering the resin and ensuring the amount of resin that is pressed and discharged.

[0040] The trigger 220 can realize the movement of the compression end in a variety of ways. The trigger 220 can be, for example, in one embodiment, the trigger 220 includes a vibrating member 221 and a striker 222, the striker 222 is connected to the vibrating member 221, the striker 222 includes a compression end, and the vibrating member 221 is used to vibrate under electric drive to drive the striker 222 to extrude the resin. The vibrating member 221 can be a piezoelectric ceramic sheet, by providing a driving voltage to the piezoelectric ceramic sheet, and then based on the piezoelectric effect of the piezoelectric ceramic sheet, the piezoelectric ceramic sheet vibrates, and then drives the striker 222 to move up and down to achieve the extrusion of the resin. Alternatively, it is also possible to use only a piezoelectric element, the piezoelectric element as a part of the side wall of the discharge channel 211, the piezoelectric element is a component with a piezoelectric effect, such as a piezoelectric ceramic sheet, the piezoelectric ceramic sheet as the side wall of the drip chamber 2112, through the vibration of the piezoelectric ceramic sheet, the space of the drip chamber 2112 becomes larger or smaller, and then the extrusion of the resin is achieved. The piezoelectric element may also be a piezoelectric chip, such as a piezoelectric quartz crystal, etc. Alternatively, the trigger 220 may include a pneumatic member and a screw, the screw is connected to the pneumatic member, the screw includes a pressure discharge end, and the pneumatic member is connected to an external air supply device, which then drives the screw to rotate and pushes the resin to be discharged.

[0041] In one embodiment, the outlets of resins of various colors or materials are gathered in a relatively small space, such as in a very small circular area. The diameter of the circular area can be in the micron level. From the overall macroscopic perspective of the device, multiple discharge ports 212 are similarly concentrated at one point, so the resins of different colors sprayed out from different discharge ports 212 only have micron-level spacing. Since the resin has diffusion fluidity, the micron-level spacing will allow the resins of various colors to mix rapidly through molecular motion, that is, to achieve the color mixing effect during spraying. The present application achieves real-time color mixing by spraying. Compared with traditional color nozzles, there is no need to prefabricate a color mixing cavity on the nozzle in advance, and there is no need to stir and mix the ink resins of various colors in the color mixing cavity before spraying through the nozzle when spraying one color. This makes the present embodiment have the advantages of faster speed, higher efficiency, and more realistic and accurate molding colors. In order to achieve the proximity of multiple discharge ports 212 and ensure the color mixing effect, the following preferred embodiments can be specifically adopted:

[0042] First, the distance between at least two of the multiple outlets 212 is less than or equal to the fifth preset distance, and the fifth preset distance can be set according to the actual resin material and color mixing requirements, such as the fifth preset distance is greater than or equal to 0.1 mm and less than or equal to 1.6 mm. In this way, while ensuring that the outlets do not interfere with each other and cause color pollution, it is possible to ensure that the materials sprayed from the outlets are easy to mix in real time at the spraying position, or not actually mixed but have a good color fusion effect in visual effect.

[0043] Secondly, the distance between at least two of the multiple discharge ports 212 is less than or equal to the spraying diameter or spraying radius of the discharge port 212. For example, the spraying range of a discharge port 212 can be circular, then the spraying diameter is the diameter of the circular range of spraying, and the spraying radius is the radius of the circular range of spraying. For another example, the spraying range of a discharge port 212 can be elliptical, then the spraying diameter is the maximum outer diameter or minimum outer diameter of the spraying resin range of a single discharge port 212, and the spraying radius is half of the maximum outer diameter or half of the minimum outer diameter of the spraying resin range of a single discharge port 212. For another example, the spraying range of a discharge port 212 can also be an irregular pattern, then the spraying diameter is the maximum outer diameter or minimum outer diameter of the spraying resin range of a single discharge port 212, and the spraying radius is half of the maximum outer diameter or half of the minimum outer diameter of the spraying resin range of a single discharge port 212. In this way, it can be ensured that the spraying ranges of the discharge ports of resins of different colors can overlap to a certain extent, and then the resins sprayed from the discharge ports 212 can interfere with each other and then mix, thereby achieving a better color mixing effect.

[0044] Third, the spraying ranges of at least two of the multiple discharge ports 212 overlap with each other, and the ratio of the overlapping area to the total spraying area is greater than a preset percentage. Since the spraying range is usually small, even if there are some areas that do not overlap, the appearance can still achieve a mixed color effect. The preset percentage can be 30%, 50%, 70%, 90%, etc. In this way, it can be ensured that when the material to be cured is sprayed onto the corresponding spraying position on the molding platform or the model, it can have a better real-time mixing effect of the color material, or have a better color fusion effect in terms of visual effect.

[0045] Fourthly, the edge spacing of the spraying range of at least two of the multiple discharge ports 212 is smaller than the preset spacing, and the spraying range of the discharge port 212 is smaller than the preset area, that is, the discharge port 212 sprays a smaller area each time, and the distance between multiple smaller spraying areas is small, such as 1 micron to 3 microns, and then it still presents a mixed color effect from a macroscopic perspective, and the resin can cross the micron-level spacing by molecular movement, thereby achieving color mixing in at least part of the area.

[0046] The distance between the two discharge ports 212 is the distance between the centers of the discharge ports 212 , or the distance between the two discharge ports 212 is the distance between the edges of one side of the discharge ports 212 .

[0047] In some other embodiments, multiple discharge ports 212 may be divided into multiple groups, and the distance between at least two discharge ports 212 in any group of discharge ports 212 may be less than the sixth preset distance, or the relevant distance setting of any one to fourth of the discharge ports 212 mentioned above may be satisfied.

[0048] The number of any group of discharge ports 212 is the same, such as any group of discharge ports 212 includes five discharge ports 212 that can spray white, cyan, magenta, yellow, and black. The distance between at least two discharge ports 212 in any group of discharge ports 212 is less than the sixth preset distance, thereby achieving the many advantages described in the previous embodiment, which will not be repeated here. Setting multiple groups of discharge ports 212 can increase the spraying efficiency, or print two or more models at the same time, such as the discharge ports 212 are divided into two groups, and the two groups of discharge ports 212 are spaced apart. During the movement and spraying process of the print head assembly 200, the two groups of discharge ports 212 are respectively sprayed in different areas according to the presence or absence of the model at the corresponding position and the color, thereby improving the spraying efficiency. Alternatively, the two groups of discharge ports 212 can be controlled to spray in the same spraying process at the same time, so that two identical models can be formed at the same time.

[0049] In one embodiment, if Figure 2As shown, the laminate manufacturing equipment also includes a feed assembly 500, which includes at least one of the aforementioned silos 510, at least one feed piece 520 and at least one transmission piece 530, wherein the transmission piece 530 is connected and communicated with the silo 510 and the print head assembly 200, and the feed piece 520 is connected to the transmission piece 530 and / or the silo 510, and is used to drive the resin in the silo 510 into the print head assembly 200 via the transmission piece 530.

[0050] The number of silos 510 can be consistent with the number of colors of the resin that needs to be provided, such as five silos 510, which are used to store resins of five colors: white, cyan, magenta, yellow, and black. The transmission member 530 can be a flexible tube, and the feeding member 520 is a power member that drives the resin to move, such as a peristaltic pump, which is connected to the flexible tube. Or the feeding member 520 can also be an air pump, which is connected to the silo 510, and provides a quantitative airflow into the silo 510, thereby pressing and discharging the resin. In some other embodiments, such as the embodiment including the total material box, the transmission member 530 can be connected between the total material box and the silo 510, and the feeding member 520 can transfer the resin between the total material box and the silo 510, and the resin in the silo 510 enters the print head assembly 200, which is driven by the trigger 220.

[0051] In one embodiment, the moving mechanism 300 includes a horizontal driving mechanism 310 and a vertical driving mechanism 320. The connection relationship between the horizontal driving mechanism 310 and the vertical driving mechanism 320 and the print head assembly 200 and the molding platform 100 can be various, and the purpose is to drive the print head assembly 200 and the molding platform 100 to move relative to each other. For example, in one embodiment, the horizontal driving mechanism 310 is connected to one of the print head assembly 200 and the molding platform 100, and is used to drive the print head assembly 200 or the molding platform 100 to move in a plane parallel to the molding platform 100, and the vertical driving mechanism 320 is connected to the other of the print head assembly 200 and the molding platform 100, and is used to drive the molding platform 100 and the print head assembly 200 to move closer to or away from each other, that is, one of the print head assembly 200 and the molding platform 100 moves horizontally, and the other moves vertically. Alternatively, the horizontal drive mechanism 310 and the vertical drive mechanism 320 are both connected to the molding platform 100, and the connection can be direct or indirect, such as the horizontal drive mechanism 310 is directly connected to the molding platform 100, and the vertical drive mechanism 320 is connected to the horizontal drive mechanism 310, and the horizontal drive mechanism 310 can drive the molding platform 100 to move freely in the entire horizontal plane, and then the print head assembly 200 can remain stationary; or, the horizontal drive mechanism 310 can drive the molding platform 100 to move in a single direction of the horizontal plane, such as moving in the Y direction, and then the print head assembly 200 needs to move in the X direction perpendicular to the Y direction in the horizontal plane. Alternatively, the horizontal drive mechanism 310 and the vertical drive mechanism 320 are both connected to the print head assembly 200, and the feasible implementation methods of connecting the horizontal drive mechanism 310 and the vertical drive mechanism 320 to the molding platform 100 are similar, which will not be repeated here.

[0052] The following takes the embodiment in which the horizontal driving mechanism 310 is connected to the print head assembly 200 and the vertical driving mechanism 320 is connected to the molding platform 100 as an example to specifically introduce a horizontal driving mechanism 310 and a vertical driving mechanism 320 .

[0053] In one embodiment, if Figure 6 As shown, the horizontal driving mechanism 310 includes a first direction driving mechanism and a second direction driving mechanism. The first direction driving mechanism is connected to the print head assembly 200 and is used to drive the print head assembly 200 to move in the first direction. The first direction driving mechanism is connected to the second direction driving mechanism, and the second direction driving mechanism is used to drive the first direction driving mechanism to move in the second direction.

[0054] The first direction may be the X-axis direction, and the second direction may be the Y-axis direction, that is, the first direction and the second direction are perpendicular. In one embodiment, there may be two second direction drive mechanisms, and the two ends of the first direction drive mechanism in the extension direction are respectively connected to the two second direction drive mechanisms, which can increase the stability of the movement of the first direction drive mechanism, so that the first direction drive mechanism is not easy to vibrate, thereby ensuring the accuracy of the position of the print head assembly 200.

[0055] In one embodiment, the first direction driving mechanism includes at least one first driving member 311, a first track 312 and at least one first transmission member 313, the print head assembly 200 is slidably connected to the first track 312, the first transmission member 313 is respectively connected to the first driving member 311 and the print head assembly 200, the first transmission member 313 includes a synchronous belt or the first transmission member 313 includes a screw. And / or, the second direction driving mechanism includes a second driving member, a second track 314 and a second transmission member 315, the first direction driving mechanism is slidably connected to the second track 314, the second transmission member 315 is respectively connected to the second driving member and the first direction driving mechanism, the second transmission member 315 includes a synchronous belt or the second transmission member 315 includes a screw. That is, the driving mode of the first direction driving mechanism and the second direction driving mechanism can be transmission by the cooperation of the screw and the nut, or transmission by a synchronous belt.

[0056] More specifically, the number of the first driving members 311 is two, and the first transmission member 313 includes two synchronous belts (not shown) and four roller assemblies. There are two second direction driving mechanisms, and the second transmission member 315 includes a screw rod and a nut that are screwed together. At least two rollers are arranged in the roller assembly. The first track 312 can be at least one optical axis, and the first track 312 extends in the X-axis direction. The print head assembly 200 can be directly or indirectly connected to the first track 312 by sliding. The two ends of the first track 312 are respectively connected to the roller assemblies. The second track 314 can be a slide bar, and the second track 314 extends in the Y-axis direction. The second track 314 is used to be fixed. The two roller assemblies connected to the first track 312 are respectively connected to the nuts of the two second direction driving mechanisms, and are directly or indirectly connected to the second track 314 by sliding. The other two roller assemblies that are not connected to the first track 312 are respectively fixed to the outer sides of the ends of the two second tracks 314. One end of one of the two first transmission members 313 is connected to the first side of the print head assembly 200, and then is sequentially wound around the rollers on the four roller assemblies and the output shaft of the first driving member 311, and then connected to the second side of the print head assembly 200 opposite to the first side. The other first transmission member 313 is also wound around.

[0057] During the driving process, the second driving member drives the second transmission member 315 to rotate, and then pushes the nut through the thread action to drive the first track 312 and the print head assembly 200 to move in the Y direction. The two first driving members 311 synchronously drive the first transmission member 313 to pull the print head assembly 200 to move in the X-axis direction, and then realize the free movement of the print head assembly 200 in all directions within the plane. In the above embodiment, the first driving member 311 is not directly connected to the first track 312, but is fixed separately, which reduces the driving burden of the second direction driving mechanism, makes the movement of the print head assembly 200 faster, and can reduce mechanical losses. The use of two first driving members 311 can reduce the driving burden of a single first driving member 311 and reduce the performance requirements for the first driving member 311.

[0058] In one embodiment, if Figure 7 As shown, the vertical drive mechanism 320 includes a lifting body 321, a lifting guide rail 322, a slider 323, a support arm 324, a third drive member 325 and a lifting screw. The lifting body 321 is fixedly arranged. The lifting guide rail 322 is connected to the lifting body 321 and extends in the Z axis or the vertical direction. The third drive member 325 is connected to the lifting body 321 and is located at one end of the lifting body 321, and the lifting screw is connected to the third drive member 325. The first end of the cantilever 111 is directly screwed to the lifting screw or screwed through an additional nut. The cantilever 111 is slidably connected to the lifting guide rail 322 directly or through the slider 323, and the cantilever 111 is also connected to the molding platform 100. The third drive member 325 is used to drive the lifting screw to rotate, so as to drive the cantilever 111 to drive the molding platform 100 to rise and fall through the pushing action of the thread.

[0059] In one embodiment, the curing light source 400 includes a first light source, which is fixedly disposed above the molding platform 100 and is independently disposed from the print head assembly 200 . The first light source is used to project curing light onto the molding platform 100 or the formed model.

[0060] For example, the first light source is fixed in position during the printing process and is used to project curing light in the direction of the molding platform 100. After the printing is completed, the first light source can be started, and the curing light can form a projection of the preset contour of the current layer model on the sprayed liquid resin, and then the resin is cured according to the preset contour to form the current layer model. Alternatively, during the printing process, the first light source can be continuously turned on to continuously form a projection of the preset contour of the current layer model on the current layer of sprayed resin, and then after the spraying is completed, the entire current layer model can be cured, and curing can be achieved during the spraying process, ensuring timely curing and curing time. Alternatively, during the printing process, the first light source can be continuously turned on to continuously form a projection of the sprayed area on the current layer of sprayed resin, that is, only the sprayed area is cured, which can save display costs and heat. The setting position of the first light source can be located above the print head assembly 200, and then after the printing is completed, the print head assembly 200 needs to be moved away to avoid blocking the light. Alternatively, the first light source may be disposed on the side, such as at a position equal to or slightly higher than the print head assembly 200, and then the projection of the curing light will not be affected by the position of the print head assembly 200, and curing can be continued during the spraying process.

[0061] In some other embodiments, the curing light source 400 includes a second light source connected to the print head assembly 200 , and the second light source is used to project curing light onto the forming platform 100 or the formed model.

[0062] The second light source is a mobile light source, and the number of the second light sources can be multiple, such as two, and the two second light sources are connected to the opposite sides of the print head assembly 200 to provide curing light to the spraying position. The second light source can provide a projection of the contour of the model layer at the specified position as mentioned above, and can also be a point light source and / or a line light source, which can be cured along with the sprayed resin, and can avoid the problem of untimely curing caused by one-time curing after the spraying is completed, thereby ensuring the accuracy of the resin color.

[0063] In some other embodiments, if the molding platform 100 moves while the print head assembly 200 does not move, the second light source may be disposed on the print head assembly 200 . In this case, the second light source is a fixed light source, and the resin is cured in conjunction with the movement of the molding platform 100 .

[0064] The curing light source 400 may project light of a preset contour by directly projecting it through an optical machine. Optionally, a reflector and a light channel may be provided. The curing light of the optical machine is reflected by the reflector, and the curing light is then projected through the light channel, thereby extending the light path and reducing the space occupied by the curing light source 400. The light channel plays a role of shading, ensuring the utilization rate of the curing light and reducing the influence of the outside world on the curing light. Alternatively, the first light source includes a light-emitting component and a gating screen. The light-emitting component is used to emit curing light. The gating screen is located on one side of the light-emitting component. The gating screen selectively transmits the curing light emitted by the light-emitting component to form a patterned curing light. Alternatively, the first light source includes a follower light emitter. The follower light emitter is used to follow the movement of the print head assembly 200 to emit curing light that is irradiated to the sprayed area of ​​the print head assembly 200, so as to cure the material to be cured sprayed by the print head assembly 200.

[0065] Optionally, in an embodiment where the first light source includes a light-emitting component and a gate screen, the lamination manufacturing device further includes a release film disposed on the side of the gate screen facing the molding platform 100, the release film is parallel to the film on the upper surface of the molding platform 100, and the release film is tight and has a certain elasticity. The positions of the first light source and the release film are relatively fixed. After the print head assembly 200 sprays a layer of the material to be cured, the relative movement between the release film and the printing platform 100 makes the distance between the cured part of the model and the release film equal to the thickness of the current printing layer of the model, or makes the distance between the molding platform 100 and the release film equal to the thickness of the current printing layer of the model, wherein the spraying thickness of a layer of the material to be cured sprayed by the print head assembly 100 is greater than the thickness of the current printing layer.

[0066] After the print head assembly 200 is sprayed, the resin surface may not be flat, but slightly uneven due to spraying errors or differences in viscosity of different color resins. Through the extrusion of the release film, the newly sprayed resin can be accommodated between the molded model or the molding platform 100 and the release film, such as being able to extrude the resin to the thickness of the current layer model, and being able to make the surface of the sprayed resin flat, thereby ensuring the molding quality of the current layer model. In addition, through the release characteristics of the release film, the molding platform can drive the solidified current layer model away from the release film, so that the solidified current layer model can be detached from the release film, achieving separation, completing the printing of one layer, and then entering the process of printing the next layer.

[0067] In some embodiments, the lamination manufacturing equipment also includes a release film scraper assembly, which includes a release film scraper and a scraper driving mechanism. The release film scraper is arranged on the side of the release film facing the forming platform, and the scraper driving mechanism drives the release film scraper to sweep on the side of the release film facing the forming platform, so that the solidified current layer model can be separated from the release film, and the uncured resin or some debris remaining on the release film can be scraped off from the release film by the sweeping of the release film scraper, which can ensure that the printing is layer by layer without color bleeding and improve the fineness of the printing.

[0068] In one embodiment, if Figure 1-2 As shown, the additive manufacturing apparatus further includes a scraping mechanism 600, at least a portion of which is used to move relative to the molding platform 100 to scrape the resin.

[0069] After the printing head assembly 200 is sprayed, due to spraying errors or different viscosity of different color resins, the resin surface may not be flat, but slightly uneven. The resin is scraped flat by the scraping mechanism 600, and then solidified, so that the surface of each solidified layer is guaranteed to be flat, which is helpful for the adhesion of the next layer of resin and the precision of molding. The relative movement of the scraping mechanism 600 and the molding platform 100 can be that the scraping mechanism 600 is fixed as a whole, while the molding platform 100 moves, such as the molding platform 100 is connected to a Y-axis drive mechanism and a vertical drive mechanism, and the scraping mechanism 600 includes a scraper extending in the horizontal X-axis direction. When the molding platform 100 moves to a certain distance from the bottom of the scraper, the molding platform 100 moves along the Y-axis, and then the scraper scrapes the resin flat. Alternatively, it can be that a part of the scraping mechanism 600 moves horizontally in one direction, while the molding platform 100 rises and falls. For example, if the molding platform 100 is connected with a vertical driving mechanism, and the scraping mechanism 600 includes a scraper extending in the horizontal X-axis direction and a driving mechanism driven in the Y direction, when the molding platform 100 moves to a certain distance from the bottom of the scraper, the driving mechanism driven in the Y direction drives the scraper to move along the Y axis, and then the scraper scrapes the resin. Alternatively, a part of the scraping mechanism 600 moves horizontally in one direction and can move vertically, while the molding platform 100 does not move. If the scraping mechanism 600 includes a scraper extending in the horizontal X-axis direction and a driving mechanism driven in the Y direction and a driving mechanism driven in the Z direction, when the driving mechanism driven in the Z direction moves the scraper to a certain distance from the top surface of the molding platform 100, the driving mechanism driven in the Y direction drives the scraper to move along the Y axis, and then the scraper scrapes the resin.

[0070] In one embodiment, the scraping mechanism 600 includes a scraper driving member, a scraper 610 and a slide rail 620. The scraper 610 is slidably connected to the slide rail 620, and the scraper driving member is at least connected to the scraper 610. The scraper driving member is used to drive the scraper 610 to move along the slide rail 620 to scrape the resin when the distance between the scraper 610 and the molding platform 100 reaches a preset printing height.

[0071] After the resin spraying is completed, the molding platform 100 and the scraper 610 need to be relatively moved in the vertical direction to a certain height. The movement can be the vertical movement of the molding platform 100 or the vertical movement of the scraper 610. In one embodiment, the slide rail 620 is fixed to the housing 700 of the laminate manufacturing equipment, and the molding platform 100 moves closer to or away from the scraper 610 under the drive of the moving mechanism 300, that is, the molding platform 100 moves vertically. The slide rail 620 and the scraper 610 are both parallel to the surface of the molding platform 100 relative to the print head assembly 200. Then, after the molding platform 100 moves into place, the scraper 610 can be driven to move along the slide rail 620 parallel to the molding platform 100, and then the coated resin is scraped flat, and the vertical height is consistent. Alternatively, the slide rail 620 may include a slide rail extending in the vertical direction and a slide rail extending in the horizontal direction, and the scraper drive member may include a vertical drive member and a horizontal drive member, the slide rail extending in the horizontal direction is parallel to the molding platform 100, and the scraper 610 moves close to or away from the molding platform 100 under the drive of the vertical drive member, that is, the scraper 610 moves vertically, and after reaching a certain position, it is driven by the horizontal drive member to move horizontally, and then scrapes the coated resin flat. The scraper drive member may be driven by a conveyor belt, or by a screw and a nut, such as the scraper drive member including a drive motor, a synchronous wheel and a conveyor belt, the drive motor and the synchronous wheel are respectively arranged at both ends of the extension direction of the slide rail 620, the conveyor belt is wound around the drive motor and the synchronous wheel, the scraper 610 is directly or indirectly connected to the slide rail 620 by sliding, and is connected to the conveyor belt, and then after moving to a position in the vertical direction, the drive motor can drive the scraper 610 to move or reciprocate to scrape flat.

[0072] In some embodiments, a coating may be provided at the bottom of the scraper 610. The coating should be made of a material that is not easily adhered to the resin, so as to prevent the resin from adhering to the scraper.

[0073] In one embodiment, if Figure 3 As shown, the additive manufacturing device further includes a shell 700 , which includes an inner cavity 701 , in which the molding platform 100 , the print head assembly 200 , the moving mechanism 300 and the curing light source 400 are all located, and the moving mechanism 300 is connected to the shell 700 .

[0074] The housing 700 is the main supporting structure and plays a role in making the overall appearance of the additive manufacturing equipment and ensuring the integration of the additive manufacturing equipment. In the aforementioned embodiment including the silo 510 and the feeder 520, the silo 510 and the feeder 520 can be arranged outside the housing 700, such as at the top, to facilitate the filling of the resin in the silo 510.

[0075] Optionally, the housing 700 includes a main support 710 and an opening and closing portion 720, and the opening and closing portion 720 is used to move relative to the main support 710 to selectively open or close the inner cavity 701. For example, an operation port connected to the inner cavity 701 is provided on one side of the main support 710, and the opening and closing portion 720 can be a door rotatably connected to the main support 710, and the model can be picked up through the operation port by opening the door, and the door can be closed for closed printing to prevent the smell of resin from drifting or interference from external light. The opening and closing portion 720 can be one or more, and can be made of transparent, translucent or light-shielding material.

[0076] In one embodiment, the lamination manufacturing device further includes at least one radiator 800, which can be disposed in the inner cavity 701 to dissipate heat for the print head assembly 200 and the curing light source 400. For example, the radiator 800 is opposite to the print head assembly 200, and is used to provide airflow for the print head assembly 200 to dissipate heat. The radiator 800 can be disposed on opposite sides of the print head assembly 200 to provide convection for the print head assembly 200 and accelerate the heat dissipation efficiency. The radiator 800 can be a fan.

[0077] Corresponding to the additive manufacturing device, an embodiment of the utility model further provides an additive manufacturing method, comprising:

[0078] S1-1, controlling the material supply assembly 500 to provide the material to be cured to the print head assembly 200.

[0079] The material to be cured can be a variety of resins. In the above embodiment including the material bin 510 and the material supply member 520, the material supply member 520 is started to transfer the resin from the material bin 510 to the print head assembly 200 to prepare for spraying. During the spraying process, the material supply member 520 continues to supply material.

[0080] S1 - 2 , controlling the molding platform 100 and the print head assembly 200 to move relative to each other until the print head assembly 200 and the surface of the molding platform 100 are separated by a first preset distance.

[0081] In an embodiment where the molding platform 100 moves vertically and the print head assembly 200 is located above the molding platform 100, the molding platform 100 is driven to move upward close to the print head assembly 200. The first preset distance refers to the distance between the upper surface of the molding platform 100 and the plane where the discharge port 212 of the print head assembly 200 is located, in a direction perpendicular to the upper surface of the molding platform 100. The first preset distance should be sufficient to allow the print head assembly 200 to spray out resin that is consistent with or higher than the thickness of the current layer of the model, that is, to ensure that the first preset distance is not less than the thickness of the current layer of the model. In addition, the first preset distance cannot be too large, otherwise it will cause inaccurate resin dripping position. For example, the first preset distance can be 1.2 to 2 times the thickness of the current layer of the model.

[0082] In some other embodiments, printing can also be continued on the printed model, and the actual height of the printing platform is the first preset distance between the print head assembly 200 and the surface of the forming platform 100 plus the height of the formed model.

[0083] S1-3, controlling the print head assembly 200 to spray a variety of to-be-cured materials onto the molding platform 100 according to the color information of the current cured layer of the printed model.

[0084] For example, in the embodiment in which the print head assembly 200 includes a main body 210 and a plurality of triggers 220, the triggers 220 corresponding to the colors can be controlled to move as needed, and then one or more colors are specified for extrusion and spraying. The lamination manufacturing method further includes: obtaining the slice data and color information of the printing model, and obtaining the slice data and color information can be performed before controlling the supply assembly 500 to provide the resin to the print head assembly 200 in step S1, and then if the color information does not include a certain color, it is not necessary to provide the resin.

[0085] Controlling the print head assembly 200 to spray resin onto the molding platform 100 according to the color information of the current solidified layer can be specifically as follows: controlling the print head assembly 200 to move, and according to the color of the current solidified layer corresponding to the position of the print head assembly 200, controlling one or more triggers 220 of corresponding colors in the print head assembly 200 to discharge the resin, so that one or more colors of resin are sprayed onto the molding platform.

[0086] If the colors include white, cyan, magenta, yellow, and black, when green resin needs to be sprayed, the triggers 220 corresponding to the magenta resin and the yellow resin are driven to move at the same time, and then the magenta resin and the yellow resin are sprayed at the same time. Since the positions of the discharge ports 212 of various colors are very close, the extruded magenta resin and the yellow resin will be quickly mixed, and then the green resin will be formed on the molding platform 100. The setting of the discharge port 212 can refer to the setting rules of the distance between at least two of the plurality of discharge ports 212 mentioned above, such as the sprayed resin is at least partially mixed, or the distance is less than the preset spacing, and the spraying area is small, etc. It will not be repeated here.

[0087] Alternatively, in the embodiment where the discharge channel 211 includes a fusion chamber, when green resin needs to be sprayed, the magenta resin and the yellow resin are driven into the fusion chamber at the same time, and then mixed in the fusion chamber to form green resin before being sprayed out. If only magenta needs to be sprayed, only the trigger 220 corresponding to the magenta resin is driven to move.

[0088] The slice data also includes the printing trajectory information of the current solidified layer, or includes the physical contour of the current solidified layer. When the print head assembly 200 moves to spray, the moving path can be multiple. For example, in one embodiment, the print head assembly 200 is controlled to move the print head assembly 200 according to the printing trajectory information of the current solidified layer, and the print head assembly 200 is controlled to spray the material to be solidified according to the color information of the current solidified layer during the movement. The printing trajectory information is the preset line path information moving within the contour range of the current layer model. The printing trajectory information should ensure that the entire model area of ​​the current layer is covered and will not correspond to the area outside the current layer model. Similar to the way the nozzle of the FDM printer sprays molten consumables, the resin is sprayed in a preset line diameter within the contour of the current solidified layer, and then a resin coating that conforms to the contour of the current solidified layer is obtained. If the contours of different layers of models change, the moving path of the print head assembly 200 will be different. Alternatively, in some other embodiments, the print head assembly 200 may be controlled to move in a line-by-line scanning manner within a preset printing area, and the print head assembly 200 may be controlled to spray the material to be cured according to the color information of the current solidified layer when it moves within the physical contour range of the current solidified layer. For example, the projection area of ​​the entire model on the molding platform 100 is used as the preset printing area. During the printing process of any layer of the model, the print head assembly 200 moves along the same moving path, and the moving path satisfies the discharge port 212 to scan the entire preset printing area. When it is within the contour range corresponding to the current solidified layer, the resin is sprayed, and when it moves out of the wheel library of the current solidified layer, the spraying is stopped, thereby forming a resin coating of the preset contour. This scanning spraying does not need to distinguish the model contour to control the moving path of the print head assembly 200, making the control of the print head assembly 200 simpler, and only needs to control whether the print head assembly 200 is sprayed and the color.

[0089] S1-4, controlling the curing light source 400 to project curing light onto the material to be cured, so as to cure the material to be cured and form a current cured layer.

[0090] Depending on the structure of the curing light source 400, the specific control method is also different. For example, the curing light source 400 is fixedly set. After the current layer of resin is sprayed, the curing light source 400 is controlled to irradiate according to the contour of the current curing layer. Alternatively, in step S1-3, the curing light source 400 is continuously controlled to irradiate according to the contour of the current curing layer in the process of controlling the print head assembly 200 to spray the resin to the molding platform 100 according to the color information of the current curing layer. Alternatively, in step S1-3, the curing light source 400 is continuously controlled to irradiate according to the contour of the area where the resin has been sprayed in the process of controlling the print head assembly 200 to spray the resin to the molding platform 100 according to the color information of the current curing layer. Alternatively, the curing light source 400 is connected to the print head assembly 200 for mobile curing. The curing light source 400 can be a surface light source, a point light source or a line light source, such as a line light source. During the movement of the print head assembly 200, the curing light source 400 continuously provides curing light, and continuously changes the length of the line light source according to the actual position of the print head assembly 200, and then realizes the curing of the resin line by line segment. Alternatively, the print head assembly 200 may be fixed, and the curing light source 400 may be connected to the print head assembly 200. During the movement of the molding platform 100, the length of the line light source is continuously changed according to the actual position of the molding platform 100, thereby achieving resin curing line by line segment.

[0091] In some embodiments, controlling the print head assembly 200 to spray a plurality of materials to be cured onto the molding platform 100 according to the color information of the current curing layer includes: controlling the print head assembly 200 to spray a plurality of materials to be cured onto the first spraying range of the molding platform 100 according to the color information of the current curing layer. Controlling the curing light source 400 to project curing light onto the material to be cured to cure the material to be cured and form the current curing layer includes: controlling the curing light source 400 to project curing light onto the material to be cured in the first curing range to cure the material to be cured and form the current curing layer. Wherein, the first spraying range and the first curing range are both determined by the physical contour of the current curing layer, the first spraying range includes the first curing range and the first spraying range is larger than the first curing range. Since the control of the light profile is more precise than the control of the spraying position of the print head assembly 200, the print head assembly 200 sprays a large range of resin, and then determines the area of ​​the physical contour of the current curing layer as the first curing range, and then the curing light cures the part of the resin in the large range that meets the contour of the model of this layer, thereby making the resin curing more accurate. In some embodiments, the first spraying range is formed by expanding the area of ​​the solid outline of the current solidified layer by a fourth preset distance. The fourth preset distance can be 0.3 mm, 0.5 mm, etc., thereby ensuring that a sufficient area of ​​the resin spraying area is provided without wasting resin and significantly extending the spraying time.

[0092] In one embodiment, the present application also provides another lamination manufacturing method, comprising:

[0093] S2 - 1 . Control the supply assembly 500 to supply resin to the print head assembly 200 .

[0094] S2-2, controlling the molding platform 100 and the print head assembly 200 to move relative to each other until the print head assembly 200 and the surface of the molding platform 100 are separated by a first preset distance.

[0095] S2-3, controlling the print head assembly 200 to spray resin onto the molding platform 100 according to the color information of the current solidified layer.

[0096] S2-4, controlling the print head assembly 200 to move outside the optical path of the curing light.

[0097] In the embodiment where the curing light source 400 is fixedly arranged and located on the side of the print head assembly 200 opposite to the molding platform 100, such as located on the top side of the inner cavity 701 of the housing 700, the print head assembly 200 will block the curing light from being projected onto the molding platform 100, so the print head assembly 200 needs to be moved, such as moved to the edge relative to the molding platform 100, or it can be controlled according to the position of the model. It can be understood that if the curing light source 400 is arranged so that the print head assembly 200 does not block the curing light, this step can be omitted.

[0098] S2-5, controlling the scraping mechanism 600 to move relative to the molding platform 100 to scrape the resin.

[0099] Here, an implementation example is taken in which the molding platform 100 is raised and lowered to achieve a height that can be acted upon with the scraping mechanism 600. The scraping mechanism 600 includes a scraper drive, a scraper 610, and a slide rail 620. The scraper 610 can be located slightly lower than the bottom of the print head assembly 200. During the printing process, the scraper 610 can be moved to the outside of the molding platform 100 by controlling the scraper drive to make way for the spraying process. After the spraying is completed, the molding platform 100 is driven to rise or fall so that the vertical distance between the top surface of the molding platform 100 and the bottom surface of the scraper 610 is the thickness of the current solidified layer plus the height of the formed model. Then the scraper 610 is driven to move to scrape the resin layer that has just been applied.

[0100] S2-6, control the molding platform 100 and the curing light source 400 to move relative to each other until the curing light source 400 is spaced a second preset distance from the surface of the molding platform 100. When the curing light source is spaced a second preset distance from the molding platform 100, the projection of the curing light matches at least part of the contour of the current layer model.

[0101] The projection of curing light refers to the projection of curing light on the liquid resin just applied. Since the light emitted by the curing light source 400 is propagated in a beam, the projection profile of the curing light will be different at different heights of the molding platform 100. The second preset distance is the distance that makes the projection profile consistent with the profile of the current solidified layer. The second preset distance between the curing light source 400 and the surface of the molding platform 100 can be achieved by moving the curing light source 400 or by moving the molding platform 100. After spraying is completed, the molding platform 100 can be moved up according to the actual position to achieve the second preset distance from the curing light source 400, or it can be moved down to achieve the second preset distance from the curing light source 400.

[0102] The second preset distance may be the sum of the preset projection distance and the height of the formed model. The preset projection distance is the distance between the light emitting surface of the curing light source 400 and the forming platform 100 when the first layer of the model is printed and the first layer of the model is projected onto the forming platform 100 by the curing light source 400; or the preset projection distance is the distance between the light emitting surface of the curing light source 400 and the formed model of the model, and the distance is associated with the thickness of the current curing layer.

[0103] In some embodiments, the preset projection distance is positively correlated with the cured thickness. In this embodiment, the preset projection distance is set as the target printing thickness of the current cured layer, so that the model printing thickness can be precisely controlled. For example, in an embodiment where the lamination manufacturing equipment includes a release film, the distance between the light-emitting surface of the curing light source and the formed model carried on the forming platform 100 can be controlled to achieve extrusion of the sprayed resin layer, thereby precisely controlling the thickness of the sprayed resin layer to be adjusted to the target printing thickness of the current cured layer, thereby facilitating precise control of the thickness of each layer of the model, and being able to adapt to the different thicknesses of each layer of the model. After the release film extrudes the resin and precisely controls the thickness of each layer of the model, light is projected to cure the resin.

[0104] S2-7, controlling the curing light source 400 to project curing light onto the resin to cure the resin to form a current cured layer.

[0105] S2-8, control the molding platform 100 and the print head assembly 200 to move relative to each other until the print head assembly 200 and the surface of the molding platform 100 are spaced apart by a third preset distance, wherein the third preset distance is greater than the first preset distance by the thickness of the current solidified layer; control the print head assembly 200 to spray resin on the current solidified layer according to the color information of the next solidified layer; control the curing light source 400 to project curing light onto the resin to cure the resin and form the next solidified layer; execute the above steps until the model printing is completed.

[0106] After step S2-7 is completed, the first layer of the model will be formed on the molding platform 100, and then the molding platform 100 can be raised or lowered so that the position of the molding platform 100 is lower by the thickness of one layer of the model compared to the position when the previous layer was printed, and then the above steps can be repeated. For example, if the thickness of a single-layer model is 1 mm, when printing the first layer of the model, the height of the molding platform 100 relative to the zero position is 50 mm for resin spraying, and when printing the second layer of the model, the height of the molding platform 100 relative to the zero position is mm for resin spraying, and the subsequent third layer model, fourth layer model... follow this rule and descend one layer thickness each time for spraying.

[0107] In one embodiment, the utility model further provides an additive manufacturing method, which is applicable to additive manufacturing equipment, wherein the additive manufacturing equipment may include a molding platform 100; at least one print head assembly 200, the print head assembly 200 is used to spray a variety of materials to be cured onto the molding platform 100; a moving mechanism 300, the moving mechanism 300 is connected to the print head assembly 200, and is used to drive the print head assembly 200 to move relative to the molding platform 100; at least one curing light source 400, the curing light source 400 is used to project curing light onto at least the molding platform 100 to cure the materials to be cured. A supply assembly 500, the print head assembly 200 is connected and communicated with the supply assembly 500, and the supply assembly 500 is used to provide resin to the print head assembly 200.

[0108] The lamination manufacturing method includes controlling the above-mentioned feeding assembly 500 to provide the material to be cured to the print head assembly 200. Controlling the moving mechanism 300 to move the print head assembly 200 so that the print head assembly 200 is close to the molding platform 100 until the print head assembly 200 moves to a first preset distance between the print head assembly 200 and the surface of the molding platform 100. Alternatively, the moving mechanism 300 can be controlled to drive the molding platform 100 to approach the print head assembly 200 until the print head assembly 200 and the surface of the molding platform 100 are separated by a first preset distance. Controlling the moving mechanism 300 to drive the print head assembly 200 to spray a plurality of materials to be cured onto the molding platform 100 according to the color information of the current cured layer. When the lamination manufacturing device further includes a flattening mechanism 600, the flattening mechanism 600 is controlled to move relative to the molding platform 100 to flatten the resin. The moving mechanism 300 is controlled so that the molding platform 100 moves to a position where the curing light source 400 is spaced apart from the surface of the molding platform 100 by a second preset distance. When the curing light source is spaced apart from the molding platform 100 by the second preset distance, the projection of the curing light matches at least a partial contour of the current layer model. The curing light source 400 is controlled to project the curing light onto the material to be cured so as to cure the material to be cured and form the current cured layer. The above-mentioned additive manufacturing method and additive manufacturing device can be combined, and the additive manufacturing method can be implemented based on the additive manufacturing device.

[0109] The present application also provides the following implementation modes:

[0110] Reference numeral 1. A build-up manufacturing device, comprising:

[0111] A molding platform 100; at least one print head assembly 200, the print head assembly 200 is used to spray a variety of materials to be cured onto the molding platform 100; a moving mechanism 300, the moving mechanism 300 is connected to the print head assembly 200, and is used to drive the print head assembly 200 to move relative to the molding platform 100; at least one curing light source 400, the curing light source 400 is used to project curing light onto the molding platform 100 to cure the material to be cured.

[0112] Label 2. A lamination manufacturing device according to label 1, wherein the plurality of materials to be solidified are a plurality of resins, wherein: the resin is a liquid resin or a gel resin; and / or the plurality of resins are resins of a plurality of colors.

[0113] Reference numeral 3, a lamination manufacturing apparatus according to reference numeral 1, wherein the curing light source 400 is used to project pattern curing light onto the molding platform 100 to selectively cure the material to be cured; and / or

[0114] The moving mechanism 300 is used to drive the print head assembly 200 to move along the physical contour of the current solidified layer of the model to be printed.

[0115] Reference numeral 4, a lamination manufacturing device according to reference numeral 1, wherein the print head assembly 200 is used to spray a plurality of materials to be cured to a first spraying range of the molding platform 100 according to color information of a current cured layer;

[0116] The curing light source 400 is used to project curing light onto the material to be cured in the first curing range to cure the material to be cured and form a current cured layer; the first spraying range includes the first curing range, and the first spraying range is larger than the first curing range; the first spraying range is formed by expanding the area of ​​the physical contour of the current cured layer by a fourth preset distance; the first curing range is the area range of the physical contour of the current cured layer.

[0117] Label 5, a laminated manufacturing device according to label 1, wherein the laminated manufacturing device also includes a silo 510, and the material to be cured stored in the silo 510 enters the print head assembly 200 through the feed port of the print head assembly 200, and a discharge port 212 is provided on the side of the print head assembly 200 facing the molding platform 100, and one or more discharge channels 211 connecting the feed port and the discharge port 212 are provided in the print head assembly 200, and in at least one discharge channel 211, the feed port 212 is connected to a first number of silos 510, and the discharge port 212 has a second number, wherein: the first number and the second number are equal; or the first number is a third number times the second number, and the third number is a positive integer.

[0118] Label 6, a laminate manufacturing device according to label 5, wherein the first quantity and the second quantity are equal, the discharge channels 211 have a first quantity, the first quantity of discharge channels 211 are not interconnected, a trigger 220 is provided on the discharge channel 211, and at least a partial section of the discharge channel 211 from the trigger 220 to the discharge port 212 has a tendency of reducing its cross section.

[0119] Reference number 7. The build-up manufacturing apparatus according to reference number 5, wherein the first number is a third number times the second number, and the third number is a positive integer;

[0120] The discharge channel 211 is provided with a plurality of triggers 220 and a fusion chamber in sequence along the direction from the feed port to the discharge port 212. The trigger 220 is triggered to control the material to be solidified to enter the discharge channel 211 from the silo 510 and enter the fusion chamber. A section of the fusion chamber close to the discharge port 212 has a tendency of shrinking cross section.

[0121] Reference numeral 8. A build-up manufacturing apparatus according to reference numeral 6 or 7, wherein:

[0122] The trigger 220 includes at least a pressure-discharging end, which is located in the discharge channel 211. The trigger 220 includes at least a partial structure of the pressure-discharging end for moving under external drive to intermittently approach or move away from the discharge port 212 to extrude the material to be solidified in the discharge channel 211 through the discharge port 212 to the molding platform 100.

[0123] Reference numeral 9. A laminate manufacturing device according to reference numeral 5, wherein the plurality of discharge ports 212 have one or more of the following features: a distance between at least two of the plurality of discharge ports 212 is less than or equal to a fifth preset distance, the fifth preset distance is greater than or equal to 0.1 mm and less than or equal to 1.6 mm; a distance between at least two of the plurality of discharge ports 212 is less than or equal to a spraying diameter or a spraying radius of the discharge port 212; spraying ranges of at least two of the plurality of discharge ports 212 overlap with each other, and a ratio of the overlapping area to the total spraying area is greater than a preset percentage;

[0124] The edge spacing of the spraying range of at least two of the multiple outlets 212 is smaller than the preset spacing, and the spraying range of the outlet 212 is smaller than the preset area; the multiple outlets 212 are divided into multiple groups, and the distance between at least two outlets 212 in any group of outlets 212 is smaller than the sixth preset distance; wherein, the distance between the two outlets 212 is the distance between the centers of the outlets 212, or, the distance between the two outlets 212 is the distance between the edges of one side of the outlets 212 close to each other.

[0125] Reference numeral 10. A build-up manufacturing apparatus according to reference numeral 6 or 7, wherein:

[0126] The trigger 220 includes a vibrating member 221 and a striker 222. The striker 222 is connected to the vibrating member 221. The striker 222 corresponds to the discharge channel 211. The vibrating member 221 is used to vibrate under electric drive to drive the striker 222 to extrude the material to be cured.

[0127] Alternatively, the trigger 220 includes a pneumatic member and a screw, the screw is connected to the pneumatic member, the screw is at least partially located in the discharge channel 211, and the pneumatic member is used to drive the screw to rotate to extrude the material to be cured;

[0128] Alternatively, the trigger 220 includes a piezoelectric element, and the piezoelectric element includes at least one of a piezoelectric ceramic sheet and a piezoelectric wafer.

[0129] Reference numeral 11. The build-up manufacturing apparatus according to reference numeral 5, further comprising:

[0130] The material supply assembly 500 includes at least one material bin 510, at least one material supply member 520 and at least one transmission member 530. The transmission member 530 is connected and communicated with the material bin 510 and the print head assembly 200. The material supply member 520 is connected to the transmission member 530 and / or the material bin 510 to drive the material to be cured in the material bin 510 to enter the print head assembly 200 via the transmission member 530 and the material feed port of the print head assembly 200.

[0131] Label 12, a laminate manufacturing device according to label 1, wherein the moving mechanism 300 includes a horizontal driving mechanism 310 and a vertical driving mechanism 320; wherein: the horizontal driving mechanism 310 is connected to one of the print head assembly 200 and the molding platform 100, and is used to drive the print head assembly 200 or the molding platform 100 to move in a plane parallel to the molding platform 100, and the vertical driving mechanism 320 is connected to the other of the print head assembly 200 and the molding platform 100, and is used to drive the molding platform 100 and the print head assembly 200 to move closer to or away from each other; or, both the horizontal driving mechanism 310 and the vertical driving mechanism 320 are connected to the molding platform 100; or, both the horizontal driving mechanism 310 and the vertical driving mechanism 320 are connected to the print head assembly 200.

[0132] Reference numeral 13. A build-up manufacturing apparatus according to reference numeral 12, wherein:

[0133] The horizontal driving mechanism 310 includes a first direction driving mechanism and a second direction driving mechanism. The first direction driving mechanism is connected to the print head assembly 200 or the molding platform 100, and is used to drive the print head assembly 200 or the molding platform 100 to move in the X-axis direction. The first direction driving mechanism is connected to the second direction driving mechanism, and the second direction driving mechanism is used to drive the first direction driving mechanism to move in the Y-axis direction. There are two second direction driving mechanisms, and the two ends of the extension direction of the first direction driving mechanism are respectively connected to the second direction driving mechanism.

[0134] Reference numeral 14. A build-up manufacturing apparatus according to reference numeral 1, wherein:

[0135] The curing light source 400 includes a first light source, which is disposed above the molding platform 100 and is independently disposed from the print head assembly 200. The first light source is used to project curing light onto the molding platform 100 or the formed model.

[0136] And / or, the curing light source 400 includes a second light source, which is connected to the print head assembly 200 and is used to project curing light onto the forming platform 100 or the formed model.

[0137] Reference numeral 15. The lamination manufacturing apparatus according to reference numeral 14, wherein the curing light source 400 comprises a first light source; the first light source is used to project pattern curing light onto the molding platform 100 to selectively cure the material to be cured; the first light source comprises an optical machine, and the optical machine is used to project pattern curing light; or

[0138] The first light source includes a light-emitting component and a selection screen. The light-emitting component is used to emit curing light. The selection screen is located on the side of the light-emitting component that emits light. The selection screen selectively transmits the curing light emitted by the light-emitting component to form patterned curing light. Or the first light source includes a following light emitter. The following light emitter is used to follow the movement of the print head assembly 200 to emit curing light that is irradiated to the sprayed area of ​​the print head assembly 200, so as to cure the material to be cured sprayed by the print head assembly 200.

[0139] Reference numeral 16. The lamination manufacturing device according to reference numeral 15, wherein the first light source comprises a light emitting component and a gating screen; the light emitting component is used to emit curing light, the gating screen is located between the light emitting component and the molding platform 100, and the gating screen selectively transmits the curing light emitted by the light emitting component to form a patterned curing light;

[0140] In addition, the laminated manufacturing equipment also includes a release film arranged on the side of the selection screen facing the forming platform 100, and the positions of the first light source and the release film are relatively fixed; after the print head assembly 200 sprays a layer of the material to be cured, the relative movement between the release film and the printing platform 100 makes the distance between the cured part of the model and the release film equal to the thickness of the current printing layer of the model, or makes the distance between the forming platform 100 and the release film equal to the thickness of the current printing layer of the model, wherein the spraying thickness of a layer of the material to be cured sprayed by the print head assembly 100 is greater than the thickness of the current printing layer.

[0141] Label 17, a lamination manufacturing device according to label 16, wherein the lamination manufacturing device also includes a release film scraper assembly, the release film scraper assembly includes a release film scraper and a scraper driving mechanism, the release film scraper is arranged on the side of the release film facing the forming platform, and the scraper driving mechanism drives the release film scraper to sweep on the side of the release film facing the forming platform.

[0142] Label 18, a lamination manufacturing device according to label 1, wherein the projection contour of the curing light projected by the curing light source 400 onto the forming platform 100 or the formed model or the sprayed material to be cured is adapted to the entire contour or part of the contour of the current layer model; or, the curing light source 400 includes a point light source and / or a line light source.

[0143] Reference numeral 19, the lamination manufacturing equipment according to reference numeral 1, further comprising: a scraping mechanism 600, wherein at least a part of the structure of the scraping mechanism 600 is used to move relative to the forming platform 100 to scrape the material to be solidified.

[0144] Reference numeral 20. A build-up manufacturing apparatus according to reference numeral 19, wherein:

[0145] The scraping mechanism 600 includes a scraper driving member, a scraper 610 and a slide rail 620. The scraper 610 is slidably connected to the slide rail 620. The scraper driving member is at least connected to the scraper 610. The scraper driving member is used to drive the scraper 610 to move along the slide rail 620 when the distance between the scraper 610 and the molding platform 100 reaches a preset distance to scrape the material to be solidified.

[0146] Label 21. A laminate manufacturing device according to label 20, wherein the slide rail 620 is fixedly arranged, the scraper 610 and the slide rail 620 are parallel to the surface of the molding platform 100 relative to the print head assembly 200, and the molding platform 100 moves towards or away from the scraper 610 under the drive of the moving mechanism 300; and / or the scraper 610 moves towards or away from the molding platform 100 at least under the drive of the moving mechanism 300.

[0147] Reference numeral 22. The build-up manufacturing apparatus according to reference numeral 1, further comprising:

[0148] A housing 700, wherein the housing 700 includes an inner cavity 701, wherein the molding platform 100, the print head assembly 200, the moving mechanism 300 and the curing light source 400 are all located in the inner cavity 701, and the moving mechanism 300 is connected to the housing 700;

[0149] The housing 700 includes a main support 710 and an opening and closing portion 720 . The opening and closing portion 720 is used to move relative to the main support 710 to selectively open or close the inner cavity 701 .

[0150] Reference numeral 23. The lamination manufacturing device according to reference numeral 1, further comprising: at least one heat sink 800, the heat sink 800 being used to dissipate heat for the lamination manufacturing device; the heat sink 800 is at least opposite to the print head assembly 200, and is used to provide airflow for the print head assembly 200 to dissipate heat;

[0151] The heat sink 800 is disposed at least on two opposite sides of the print head assembly 200 .

[0152] Label 24, a lamination manufacturing method, comprising: controlling a material supply assembly to provide a material to be cured to a print head assembly; controlling a molding platform and a print head assembly to move relative to each other until a first preset distance is separated between the print head assembly and the surface of the molding platform; controlling the print head assembly to spray a plurality of materials to be cured onto the molding platform according to color information of a current cured layer of a printed model; and controlling a curing light source to project curing light onto the material to be cured, so as to cure the material to be cured and form a current cured layer.

[0153] Reference numeral 25. The lamination manufacturing method according to reference numeral 24, wherein the step of controlling the print head assembly to spray the material to be cured onto the forming platform according to the color information of the current cured layer comprises:

[0154] Control the print head assembly to move the print head assembly according to the printing track information of the current solidified layer, and control the print head assembly to spray the material to be solidified according to the color information of the current solidified layer during the movement; or

[0155] The print head assembly is controlled to move in a preset printing area in a line-by-line scanning manner, and the print head assembly is controlled to spray the material to be cured according to the color information of the current curing layer when it moves into the physical contour of the current curing layer.

[0156] Reference numeral 26. A laminate manufacturing method according to reference numeral 25, wherein the laminate manufacturing method further comprises: obtaining slice data and color information of a printed model; the slice data comprises print track information of a current solidified layer, or comprises a physical contour of the current solidified layer; and controlling the print head assembly to spray the material to be solidified onto the forming platform according to the color information of the current solidified layer, comprising:

[0157] The print head assembly is controlled to move, and according to the color of the current solidified layer corresponding to the position of the print head assembly, one or more pressing parts of the corresponding color in the print head assembly are controlled to press the material to be solidified, so that one or more colors of the material to be solidified are sprayed onto the forming platform.

[0158] Reference numeral 27. A lamination manufacturing method according to reference numeral 24, wherein after the step of controlling the print head assembly to spray the material to be cured onto the forming platform according to the color area of ​​the current cured layer, and before the step of controlling the curing light source to project curing light onto the material to be cured to cure the material to be cured to form the current cured layer, the method further comprises:

[0159] Controls movement of the print head assembly out of the path of the curing light.

[0160] Label 28, a lamination manufacturing method according to label 24, wherein the print head assembly is controlled to spray a plurality of materials to be cured onto the forming platform according to the color information of the current curing layer, including: controlling the print head assembly to spray a plurality of materials to be cured onto the first spraying range of the forming platform according to the color information of the current curing layer; controlling the curing light source to project curing light onto the materials to be cured, so as to cure the materials to be cured and form the current curing layer, including: controlling the curing light source to project curing light onto the materials to be cured in the first curing range, so as to cure the materials to be cured and form the current curing layer; wherein the first spraying range and the first curing range are both determined by the physical contour of the current curing layer, the first spraying range includes the first curing range and the first spraying range is larger than the first curing range.

[0161] Label 29. A lamination manufacturing method according to label 28, wherein the method further comprises: expanding the area of ​​the solid contour of the current solidified layer by a fourth preset distance to obtain a first spraying range; and determining the area of ​​the solid contour of the current solidified layer as the first solidification range.

[0162] Label 30, a lamination manufacturing method according to label 24, wherein the first preset distance is not less than the thickness of the current layer model; after the step of controlling the print head assembly to spray the material to be cured onto the forming platform according to the color area of ​​the current curing layer, before the step of controlling the curing light source to project curing light onto the material to be cured to cure the material to be cured to form the current curing layer, the method further includes: controlling the forming platform and the curing light source to move relative to each other until the curing light source and the surface of the forming platform are spaced a second preset distance apart, and when the curing light source and the forming platform are spaced the second preset distance apart, the projection of the curing light matches at least a partial contour of the current layer model.

[0163] Label 31, a lamination manufacturing method according to label 24, wherein, after the step of controlling the print head assembly to spray the material to be cured onto the forming platform according to the color area of ​​the current curing layer, and before the step of controlling the curing light source to project curing light onto the material to be cured to cure the material to be cured to form the current curing layer, it also includes: controlling the scraping mechanism to move relative to the forming platform to scrape the material to be cured.

[0164] Reference numeral 32. A lamination manufacturing method according to reference numeral 24, wherein after the step of controlling the curing light source to project curing light onto the material to be cured to cure the material to be cured and form a current cured layer, the method further comprises: controlling the molding platform and the print head assembly to move relative to each other until the print head assembly and the surface of the molding platform are separated by a third preset distance, the third preset distance being greater than the first preset distance by the thickness of the current cured layer; controlling the print head assembly to spray the material to be cured on the current cured layer according to the color information of the next cured layer of the current cured layer; and controlling the curing light source to project curing light onto the material to be cured to cure the material to be cured and form a next cured layer.

[0165] Continue to do the above steps until the model is printed.

[0166] Label 33. A laminate manufacturing method according to label 24, wherein the laminate manufacturing method is applicable to a laminate manufacturing device as described in any one of labels 1-23.

[0167] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A laminate manufacturing device, characterized in that: include: Forming platform; at least one print head assembly, the print head assembly being used to spray a plurality of materials to be cured onto the molding platform; A moving mechanism, the moving mechanism is connected to the print head assembly and is used to drive the print head assembly to move relative to the forming platform; At least one curing light source is used to project curing light onto the molding platform to cure the material to be cured.

2. The laminate manufacturing equipment according to claim 1, characterized in that: The plurality of materials to be cured are a plurality of resins, wherein: The resin is a liquid resin or a gel resin; And / or, the plurality of resins are resins of a plurality of colors.

3. The laminate manufacturing equipment according to claim 1, characterized in that: The curing light source is used to project pattern curing light onto the molding platform to selectively cure the material to be cured; and / or The moving mechanism is used to drive the print head assembly to move along the physical contour of the current solidified layer of the model to be printed.

4. The build-up manufacturing equipment according to claim 1, characterized in that: The print head assembly is used to spray a plurality of materials to be cured to a first spraying range of the molding platform according to the color information of the current curing layer; The curing light source is used to project curing light to the material to be cured in the first curing range, so as to cure the material to be cured to form the current cured layer; The first spraying range includes the first curing range, and the first spraying range is larger than the first curing range; The first spraying range is formed by expanding the area of ​​the solid outline of the current solidified layer by a fourth preset distance; The first solidification range is the area range of the entity contour of the current solidification layer.

5. The build-up manufacturing equipment according to claim 1, characterized in that: The laminate manufacturing equipment further includes a silo, the to-be-cured material stored in the silo enters the print head assembly through a feed port of the print head assembly, a discharge port is provided on a side of the print head assembly facing the molding platform, and one or more discharge channels connecting the feed port and the discharge port are provided in the print head assembly, in at least one of the discharge channels, the feed port is connected to a first number of the silos, and the discharge ports have a second number, wherein: The first amount and the second amount are equal; or The first number is a third number times the second number, and the third number is a positive integer.

6. The build-up manufacturing equipment according to claim 5, characterized in that: The first number is equal to the second number, the discharge channels have the first number, the first number of discharge channels are not interconnected, a trigger is provided on the discharge channel, and at least a partial section of the discharge channel from the trigger to the discharge port has a tendency to reduce its cross section.

7. The laminate manufacturing equipment according to claim 5, characterized in that: The first number is a third number times the second number, and the third number is a positive integer; The discharge channel is sequentially provided with a plurality of triggers and a fusion chamber along the direction from the feed port to the discharge port. The trigger is triggered to control the material to be solidified to enter the discharge channel and the fusion chamber from the silo. A section of the fusion chamber close to the discharge port has a tendency of reducing its cross section.

8. The build-up manufacturing equipment according to claim 6 or 7, characterized in that: The trigger at least includes a pressure-discharging end, and the pressure-discharging end is located in the discharge channel. The trigger includes at least a partial structure of the pressure-discharging end for moving under external drive to intermittently approach or move away from the discharge port to extrude the material to be solidified in the discharge channel through the discharge port to the molding platform.

9. The build-up manufacturing equipment according to claim 5, characterized in that: The plurality of discharge ports have one or more of the following features: The distance between at least two of the plurality of discharge ports is less than or equal to a fifth preset distance, and the fifth preset distance is greater than or equal to 0.1 mm and less than or equal to 1.6 mm; The distance between at least two of the plurality of discharge ports is less than or equal to the spraying diameter or spraying radius of the discharge port; The spraying ranges of at least two of the plurality of discharge ports overlap with each other, and the ratio of the overlapping area to the total spraying area is greater than a preset percentage; The edge spacing of the spraying range of at least two of the plurality of discharge ports is smaller than the preset spacing, and the spraying range of the discharge port is smaller than the preset area; The plurality of discharge ports are divided into a plurality of groups, and the distance between at least two discharge ports in any group of discharge ports is less than a sixth preset distance; The distance between the two discharge ports is the distance between the centers of the discharge ports, or the distance between the two discharge ports is the distance between the edges of one side of the discharge ports.

10. The build-up manufacturing equipment according to claim 6 or 7, characterized in that: The trigger includes a vibrating member and a striker, the striker is connected to the vibrating member, the striker corresponds to the discharge channel, and the vibrating member is used to vibrate under electric drive to drive the striker to extrude the material to be solidified; Alternatively, the trigger includes a pneumatic member and a screw, the screw is connected to the pneumatic member, the screw is at least partially located in the discharge channel, and the pneumatic member is used to drive the screw to rotate so as to extrude the material to be solidified; Alternatively, the trigger includes a piezoelectric element, and the piezoelectric element includes at least one of a piezoelectric ceramic sheet and a piezoelectric wafer.

11. The build-up manufacturing equipment according to claim 5, characterized in that: Also includes: A material supply assembly, the material supply assembly comprising at least one material bin, at least one material supply member and at least one transmission member, the transmission member being connected and communicated with the material bin and the print head assembly, the material supply member being connected to the transmission member and / or the material bin, and being used to drive the material to be cured in the material bin into the print head assembly via the transmission member and the material feed port of the print head assembly.

12. The build-up manufacturing equipment according to claim 1, characterized in that: The moving mechanism includes a horizontal driving mechanism and a vertical driving mechanism; wherein: The horizontal driving mechanism is connected to one of the print head assembly and the molding platform, and is used to drive the print head assembly or the molding platform to move in a plane parallel to the molding platform, and the vertical driving mechanism is connected to the other of the print head assembly and the molding platform, and is used to drive the molding platform and the print head assembly to move closer to or farther from each other; Alternatively, the horizontal driving mechanism and the vertical driving mechanism are both connected to the forming platform; Alternatively, the horizontal driving mechanism and the vertical driving mechanism are both connected to the print head assembly.

13. The build-up manufacturing equipment according to claim 12, characterized in that: The horizontal driving mechanism includes a first direction driving mechanism and a second direction driving mechanism, wherein the first direction driving mechanism is connected to the print head assembly or the molding platform and is used to drive the print head assembly or the molding platform to move in the X-axis direction, and the first direction driving mechanism is connected to the second direction driving mechanism and the second direction driving mechanism is used to drive the first direction driving mechanism to move in the Y-axis direction; The number of the second directional driving mechanisms is two, and both ends of the first directional driving mechanism in the extending direction are respectively connected to the second directional driving mechanisms.

14. The build-up manufacturing equipment according to claim 1, characterized in that: The curing light source includes a first light source, which is disposed above the molding platform and is independently disposed from the print head assembly, and is used to project curing light onto the molding platform or the formed model; And / or, the curing light source includes a second light source, the second light source is connected to the print head assembly, and the second light source is used to project curing light onto the forming platform or the formed model.

15. The build-up manufacturing equipment according to claim 14, characterized in that: The curing light source includes the first light source; the first light source is used to project pattern curing light onto the molding platform to selectively cure the material to be cured; The first light source includes a light engine, and the light engine is used to project pattern curing light; or The first light source includes a light emitting component and a gating screen, the light emitting component is used to emit curing light, the gating screen is located on a side of the light emitting component, and the gating screen selectively transmits the curing light emitted by the light emitting component to form the patterned curing light; or The first light source includes a following light emitter, which is used to follow the movement of the print head assembly to emit curing light to illuminate the sprayed area of ​​the print head assembly to cure the to-be-cured material sprayed by the print head assembly.

16. The build-up manufacturing equipment according to claim 15, characterized in that: The first light source includes a light emitting component and a gate screen; the light emitting component is used to emit curing light, the gate screen is located between the light emitting component and the molding platform, and the gate screen selectively transmits the curing light emitted by the light emitting component to form the pattern curing light; In addition, the laminated manufacturing equipment also includes a release film arranged on a side of the selection screen facing the forming platform, and the positions of the first light source and the release film are relatively fixed; after the print head assembly sprays a layer of material to be cured, the release film and the forming platform move relative to each other so that the distance between the cured part of the model and the release film is equal to the thickness of the current printing layer of the model, or the distance between the forming platform and the release film is equal to the thickness of the current printing layer of the model, wherein the spray thickness of a layer of material to be cured sprayed by the print head assembly is greater than the thickness of the current printing layer.

17. The build-up manufacturing equipment according to claim 16, characterized in that: The lamination manufacturing equipment also includes a release film scraper assembly, which includes a release film scraper and a scraper driving mechanism. The release film scraper is arranged on the side of the release film facing the forming platform, and the scraper driving mechanism drives the release film scraper to sweep on the side of the release film facing the forming platform.

18. The build-up manufacturing equipment according to claim 1, characterized in that: The projection profile of the curing light projected by the curing light source onto the forming platform or the formed model or the sprayed material to be cured is adapted to the entire profile or a part of the profile of the current layer model; Alternatively, the curing light source includes a point light source and / or a line light source.

19. The build-up manufacturing equipment according to claim 1, characterized in that: Also includes: A scraping mechanism, at least part of the structure of which is used to move relative to the molding platform to scrape the material to be solidified.

20. The build-up manufacturing equipment according to claim 19, characterized in that The scraping mechanism includes a scraper driving member, a scraper and a slide rail, the scraper is slidably connected to the slide rail, the scraper driving member is at least connected to the scraper, and the scraper driving member is used to drive the scraper to move along the slide rail when the distance between the scraper and the forming platform reaches a preset distance to scrape the material to be solidified.

21. The build-up manufacturing equipment according to claim 20, characterized in that: The slide rail is fixedly arranged, the scraper and the slide rail are parallel to the surface of the molding platform relative to the print head assembly, and the molding platform moves closer to or away from the scraper under the drive of the moving mechanism; And / or, the scraper moves closer to or away from the forming platform at least under the drive of the moving mechanism.

22. The build-up manufacturing equipment according to claim 1, characterized in that: Also includes: A housing, wherein the housing comprises an inner cavity, the molding platform, the print head assembly, the moving mechanism and the curing light source are all located in the inner cavity, and the moving mechanism is connected to the housing; The shell includes a main support and an opening and closing portion, and the opening and closing portion is used to move relative to the main support to selectively open or close the inner cavity.

23. The build-up manufacturing equipment according to claim 1, characterized in that Also includes: at least one heat sink, the heat sink being used to dissipate heat for the build-up manufacturing equipment; The heat sink is at least opposite to the print head assembly and is used to provide airflow for the print head assembly to dissipate heat; The radiator is at least arranged on two opposite sides of the print head assembly.

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