Printing method of a three-dimensional printer and product

Abstract

This invention provides a printing method and product for a 3D printer. The printing method includes slicing a 3D digital model to be printed using a helical cut surface and generating slice data; the 3D printer acquires the slice data and drives a nozzle mechanism and a drive mechanism based on the slice data; when the nozzle mechanism sprays the printing material for the first printing layer, the spray volume of the nozzle mechanism gradually increases from a first preset value to a second preset value; when the nozzle mechanism sprays the printing material for the last printing layer, the spray volume of the nozzle mechanism gradually decreases from the second preset value to a third preset value; when the nozzle mechanism sprays the printing material for the intermediate layers other than the first and last printing layers, the spray volume of the nozzle mechanism is the second preset value. The product printed using the above printing method can improve product quality, reduce the difficulty of nozzle mechanism control, and increase printing speed.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and more specifically, to a printing method for a 3D printer and products printed using this method. Background Technology

[0002] A 3D printer is a device that uses rapid prototyping technology to print three-dimensional objects. Based on an ambiguous digital model, it uses materials such as plastic, metal powder, carbon fiber, and resin to print the three-dimensional object layer by layer. The 3D printing process begins with modeling using computer-aided design (CAD) or computer animation modeling software. The completed model is then "sliced" into layers, and the processing path is obtained by analyzing the interface information, guiding the printer to print layer by layer. Depending on the working principle, the rapid prototyping technologies used include Fused Deposition Modeling (FDM), Selective Laser Sintering (SLS), 3D Coating and Bonding (3DP), and Dielectric Prototyping (DLP).

[0003] Compared with traditional manufacturing technologies, 3D printing technology has advantages such as eliminating the need for machining and mold making, allowing direct manufacturing of parts based on graphic data, shortening product development cycles, and saving costs. However, existing FDM (Fused Deposition Modeling) printers basically use a three-axis (X-axis, Y-axis, and Z-axis) control system. Although such three-axis control systems can expand the range of printed products, their printing speed is correspondingly lower, and their structure is also more complex. In response, patent application CN202211442835.3 discloses a 3D printer, which includes a frame, a printing platform, and a printing unit. A screw is mounted on the frame, and the printing platform is installed on the frame and located below the screw. The printing unit includes a support, a nozzle mechanism, and a drive mechanism. The support is mounted on the screw, and both the nozzle mechanism and the drive mechanism are mounted on the support. The output end of the drive mechanism is connected to the screw, allowing the drive mechanism to drive the support and nozzle mechanism to perform a spiral lifting motion along the first screw, thereby causing the nozzle mechanism to spray printing materials onto the printing platform to form a product. This 3D printer has the advantages of high printing speed, high printing efficiency, and simple structure. However, the following shortcomings exist:

[0004] Because the printing unit is controlled by a screw structure for rotational printing, there is a phenomenon where the thickness of the printed layer is equal to the screw pitch. In addition, the 3D digital model is processed by planar slicing, which means that when the printing unit spirals up through the screw to print each layer, the nozzle mechanism needs to adjust the amount of printing filament sprayed in real time according to the remaining distance between the printed product and the top of the current printed layer. This affects the product forming quality, increases the difficulty of controlling the nozzle mechanism and complicates the control program, and also has a certain impact on the printing speed. Summary of the Invention

[0005] To address the aforementioned problems, the main objective of this invention is to provide a printing method for a 3D printer that improves product molding quality, reduces the difficulty of controlling the nozzle mechanism, and increases printing speed.

[0006] Another object of the present invention is to provide a product printed using the above-described printing method.

[0007] To achieve the main objective of this invention, a printing method for a 3D printer is provided. The 3D printer includes a frame, a printing platform, and a printing unit. A screw is mounted on the frame, parallel to the height direction of the frame. The printing platform is mounted on the frame and located below the screw. The printing unit includes a support, a nozzle mechanism, and a drive mechanism. The support is mounted on the screw, and both the nozzle mechanism and the drive mechanism are mounted on the support. The nozzle's ejection end faces the surface of the printing platform. The output end of the drive mechanism is connected to the screw, and the drive mechanism can drive the support to spirally rise or fall along the screw. The printing method includes slicing the three-dimensional digital model to be printed using a spiral cut surface and generating slice data; the three-dimensional printer acquires the slice data and drives the nozzle mechanism and drive mechanism according to the slice data; when the nozzle mechanism sprays the printing material for the first printing layer, the spray volume of the nozzle mechanism gradually increases from a first set value to a second set value; when the nozzle mechanism sprays the printing material for the last printing layer, the spray volume of the nozzle mechanism gradually decreases from the second set value to a third set value; when the nozzle mechanism sprays the printing material for the intermediate layers other than the first and last printing layers, the spray volume of the nozzle mechanism is the second set value.

[0008] As can be seen from the above, by slicing the three-dimensional digital model, the nozzle mechanism does not need to frequently adjust its own printing material ejection volume during the printing process, thereby improving the forming quality of the printed product, simplifying the control program, reducing the control difficulty of the nozzle mechanism, and further increasing the printing speed of the 3D printer.

[0009] A preferred embodiment is that the pitch of the helical section is equal to the pitch of the screw.

[0010] As can be seen from the above, this design can further ensure the molding quality of the printed products.

[0011] Another preferred option is that the first setting value is zero; the third setting value is zero.

[0012] As can be seen from the above, the design of the first and third settings can ensure the forming quality of the top and bottom of the printed product, as well as the flatness of the top and bottom of the product.

[0013] Another preferred embodiment is that, in the extension direction of the screw, the nozzle mechanism has an initial position and a limit position, the initial position being located at the extended end of the screw, and the limit position being located between the initial position and the fixed end of the screw, with the maximum distance between the initial position and the limit position being between one-third and one-half of the screw length.

[0014] As can be seen from the above, the design can prevent the cables connected to the printing unit from getting excessively tangled on the screw, thereby preventing cable damage and obstruction of the printing unit's operation; at the same time, it also prevents the filaments from being twisted when the printing unit uses wire-type printing consumables, thus ensuring that the printing unit can perform printing operations normally.

[0015] A further approach is to make the distance between the initial position and the platform greater than the screw pitch in the extension direction.

[0016] As can be seen above, when the first printing layer is formed, if the upward speed of the spiral motion is less than the upward speed of the printing layer thickness, the distance between the nozzle mechanism and the printing platform will become smaller. Since the platform is usually flat and there are no other items or printing materials on it during the initial printing, in order to avoid the first printing layer from contacting the nozzle end of the nozzle mechanism, which would prevent the printing materials from being ejected normally and / or cause the printing layer to not form according to the predetermined contour, the distance between the printing unit located in the initial position and the platform is set to be greater than the screw pitch.

[0017] Another preferred embodiment is that the nozzle mechanism has two or more nozzle groups distributed along a first direction, each nozzle group including two or more nozzles, which are distributed along a second direction, both the first and second directions being perpendicular to the height direction.

[0018] As can be seen from the above, the design enables the printhead mechanism to better shape the product to be printed and improves the reliability of the printing unit.

[0019] A further option is to have the printing platform slidably connected to the frame, with the printing platform having a working position and an exit position.

[0020] As can be seen above, the printing platform and the frame are slidably connected, making it more convenient to remove the printed product from the printing platform.

[0021] A further solution is that the 3D printer also includes a drive unit, which is mounted on the frame and its output is connected to the printing platform. The drive unit can drive the printing platform to move between the working position and the exit position. The printing method also includes: before the nozzle mechanism sprays printing filament onto the printing platform, the drive unit drives the printing platform to the working position; after the product is printed, the drive unit drives the printing platform to the exit position.

[0022] As can be seen from the above, driving the printing platform to move through the drive unit makes the movement of the printing platform more intelligent and the position movement of the printing platform more precise.

[0023] A further embodiment includes a curing mechanism mounted on a support. The curing mechanism includes a curing agent nozzle module with the spraying end of the curing agent nozzle module facing the table surface; and / or a UV lamp with the emitting end of the UV lamp facing the table surface.

[0024] As can be seen from the above, the setting of the curing agent nozzle module allows the curing agent to be sprayed onto the printing consumables when the printing consumables sprayed by the printhead mechanism are powder-based, so that the printing consumables can be cured faster; the setting of the ultraviolet lamp allows the printing consumables to be irradiated by the ultraviolet lamp when the printing consumables sprayed by the printhead mechanism are liquid-based, so as to improve the curing speed of the printing consumables.

[0025] To achieve another objective of the present invention, the present invention provides a product, which is a three-dimensional product, wherein the product is printed using the above-described printing method.

[0026] As can be seen from the above, products printed using the aforementioned 3D printer printing method have better molding quality and faster molding speed. Attached Figure Description

[0027] Figure 1 This is a structural diagram of a 3D printer according to the first embodiment of the printing method of the 3D printer of the present invention.

[0028] Figure 2 This is a partial structural diagram of the 3D printer after omitting some components, which is the first embodiment of the printing method of the 3D printer of the present invention.

[0029] Figure 3 This is a structural diagram of the printing unit of the first embodiment of the printing method of the 3D printer of the present invention.

[0030] Figure 4 This is a partial structural diagram of the initial printing state of the printing method of the three-dimensional printer of the present invention, according to the first embodiment.

[0031] Figure 5This is a partial structural diagram of the printing method of the 3D printer of the present invention during the completion of the printing of the first printing layer.

[0032] Figure 6 This is a partial structural diagram of the printing intermediate layer in the first embodiment of the printing method of the 3D printer of the present invention.

[0033] Figure 7 This is a partial structural diagram of the printing method of the three-dimensional printer of the present invention during the printing of the final printing layer.

[0034] Figure 8 This is a structural diagram of the printing unit of the second embodiment of the printing method of the 3D printer of the present invention.

[0035] Figure 9 This is a cross-sectional view of a 3D printer according to the first embodiment of the printing method of the 3D printer of the present invention.

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0037] First embodiment of the printing method of a 3D printer

[0038] Reference Figure 1 The 3D printer 100 includes a frame 1, a printing platform 2, a printing unit 3, and a control system.

[0039] A screw 11 is provided on the frame 1. The screw 11 extends from the top of the frame 1 to the bottom of the frame 1 in the height direction of the frame 1. The screw 11 is preferably detachably connected to the frame 1, so that the screw 11 can be selectively replaced according to the slice thickness of the three-dimensional digital model of the product to be printed. This allows the screw pitch of the screw 11 to match the slice thickness, so as to achieve higher quality forming of the product to be printed and ensure the forming accuracy of the product to be printed, thereby expanding the applicability of the three-dimensional printer 100.

[0040] The printing platform 2 is mounted on the frame 1 and is located below the screw 11, such that the screw 11 extends toward the table surface of the printing platform 2. The screw 11 is preferably perpendicular to the table surface of the printing platform 2 to ensure the molding accuracy and molding quality of the product.

[0041] Combination Figure 2 and Figure 3The printing unit 3 includes a support 31, a nozzle mechanism 32, and a drive mechanism 33. The support 31 is mounted on the screw 11 and can move up and down spirally around the axis of the screw 11. As an optional solution, the support 31 is provided with a threaded hole 311, which extends through the support 31 in the extension direction of the screw 11 and is threadedly connected to the screw 11. This allows the support 31 to be better installed on the screw 11 in conjunction with the drive mechanism 33, and prevents the printing unit 3 from tilting when moving up and down spirally along the screw 11, thereby ensuring the printing quality and accuracy of the product. Preferably, a lubricant can be provided between the threaded hole 311 and the screw 11 to reduce the friction between them, thereby allowing the support 31 to move up and down spirally relative to the screw 11 more smoothly and reducing the load on the drive mechanism 33.

[0042] The nozzle mechanism 32 is mounted on and below the support 31, with its ejection end facing the surface of the printing platform 2, allowing for better ejection of printing consumables onto the surface of the printing platform 2. The nozzle mechanism 32 may include at least one of existing fused deposition modeling nozzle modules, existing hypersonic cold spray 3D printing nozzle modules, or existing droplet jet 3D printing nozzle modules, enabling it to eject liquid, powder, or molten consumables. Preferably, the nozzle mechanism 32 has two or more nozzle groups distributed along a first direction, each nozzle group including two or more nozzles 321 distributed along a second direction. The first direction, the second direction, and the height direction are mutually perpendicular. This nozzle group design allows for better shaping of the printed product and improves the reliability of the printing unit. Furthermore, the nozzle mechanism 32 is electrically connected to the control system, enabling the control system to control some or all of the nozzles 321 on the nozzle mechanism 32 to eject printing filament based on the slice data of the 3D digital model of the product to be printed, and to control the amount of printing filament ejected from each nozzle group. It should be noted that the aforementioned nozzle module for fused deposition modeling, the existing nozzle module for hypersonic cold spray 3D printing, and the existing nozzle module for droplet jet 3D printing are all mature products in the prior art; therefore, the structure and working principle of each of these nozzle modules will not be described in detail here.

[0043] The drive mechanism 33 is mounted on the support 31, and its output end is connected to the screw 11, allowing the drive mechanism 33 to drive the support 31 to spirally rise or fall along the screw 11. As an optional solution, the drive mechanism 33 in this embodiment includes a drive module 331 and a second screw 332. The drive module 331 is mounted on the support 31 and connected to the second screw 332 to drive the second screw 332 to rotate. Preferably, the drive module 331 can be a geared stepper motor or a geared servo motor to ensure the drive mechanism 33 of the drive module 331 and improve the molding quality and accuracy of the product.

[0044] The second screw 332 is parallel to and meshes with the screw 11. One end of the second screw 332 is rotatably connected to the support 31 around its own axis of rotation, and the other end is connected to the output end of the drive module 331, allowing the second screw 332 to rotate on its own axis of rotation while simultaneously revolving helically around the axis of the screw 11. The drive module 331 drives the second screw 332 to rotate, causing the second screw 332 to drive the support 31 to spirally rise or fall along the screw 11 through its meshing with the screw 11, thereby realizing the helical lifting and lowering motion of the printing unit 3. Furthermore, the meshing between the screw 11 and the second screw 332 also enables the printing unit 3 to have high movement accuracy, thus ensuring the printing accuracy of the 3D printer 100 and the forming quality of the product. Furthermore, the second screw 332 is detachably connected to the drive module 331 and the support 31, respectively. This allows for adaptability replacement of the second screw 332 and the support 31 when the screw 11 with different pitch parameters is changed, ensuring that both the second screw 332 and the support 31 can match the replaced screw 11, thereby guaranteeing the normal operation of the printing unit 3. The drive module 331 is electrically connected to the control system, enabling the control system to control the drive module 331 to drive the support 31 to spiral upwards or downwards along the screw 11 based on the 3D printing data.

[0045] In the extension direction of the screw 11, the printhead mechanism 32 has an initial position and an extreme position. The initial position is located at the extended end of the screw 11, and the extreme position is located between the initial position and the fixed end of the screw 11. The maximum distance between the initial position and the extreme position is between one-third and one-half of the length of the screw 11; preferably, the maximum distance between the initial position and the extreme position is at one-third of the length of the screw 11. This design prevents the cable connected to the printing unit 3 from becoming excessively tangled on the screw 11, thereby preventing cable damage and / or obstruction of the printing unit 3's operation. It also prevents the filament printing consumables used in the printing unit 3 from being broken, thus ensuring that the printing unit 3 can perform printing operations normally.

[0046] Combination Figure 4 and Figure 5 In the height direction, the distance L between the initial position of the nozzle mechanism 32 and the table surface of the printing platform 2 is greater than the pitch of the screw 11, thereby ensuring that the distance L between the nozzle mechanism 32 and the table surface of the printing platform 2 is greater than the height d of the first printing layer 101. Because when the first printing layer is formed, if the upward speed of the spiral motion is less than the upward speed of the printing layer thickness, the distance between the nozzle mechanism 32 and the table surface of the printing platform 2 will become smaller. And since the table surface of the printing platform 2 is usually flat, and there are usually no other items or printing consumables placed on the printing platform 2 during the initial printing, in order to avoid the first printing layer from contacting the spray end of the nozzle mechanism 32, causing the printing consumables to not be sprayed out normally and / or causing the printing layer to not be formed according to the set contour, the distance between the printing unit 3 at the initial position and the table surface is set to be greater than the pitch of the screw 11.

[0047] The following, combined with Figures 1 to 7 The printing method of 3D printer 100 is explained as follows:

[0048] Before printing a product, its 3D digital model is first sliced. The slicing process involves importing the 3D digital model into slicing software for layered slicing and generating slice data. Specifically, a spiral cut is used to slice the 3D digital model, resulting in spiral-shaped printing layers.

[0049] Next, a screw 11 with a corresponding pitch is selected according to the thickness of the slice layer, and preferably the pitch of the helical cut surface is equal to the pitch of the screw 11 to ensure the forming quality of the printed product.

[0050] Next, the slice data can be sent directly to the 3D printer 100 in the slicing software, or the slice data can be exported from the slicing software using a readable storage medium and then imported into the 3D printer 100 using the readable storage medium.

[0051] After acquiring the slice data, the control system of the 3D printer 100 drives the nozzle mechanism 32 and the drive mechanism 33 to move according to the slice data. Specifically, according to the control command, the drive module 331 drives the second screw 332 to rotate, so that the support 31 moves spirally upward or downward along the screw 11 with the cooperation of the screw 11 and the second screw 332, so that the nozzle mechanism 32 is in the initial position. When the printing unit 3 performs the printing operation, the control system controls the nozzle mechanism 32 to spray printing consumables onto the table of the printing platform 2 according to the slice data, so as to gradually form the product.

[0052] Specifically, when the printhead mechanism 32 sprays the printing material for the first printing layer 101 onto the printing platform 2, the spray volume of the printhead mechanism 32 gradually increases from a first set value to a second set value; when the printhead mechanism 32 sprays the printing material for the intermediate layer 102 (excluding the first and last printing layers 101 and 103), the spray volume of the printhead mechanism 32 remains at the second set value; when the printhead mechanism 32 sprays the printing material for the last printing layer 103, the spray volume of the printhead mechanism 32 gradually decreases from the second set value to a third set value. Preferably, both the first and second set values ​​are zero to ensure the forming quality of the top and bottom of the printed product and to ensure the flatness of the top and bottom of the product.

[0053] After printing the product is completed, the control system resets the printing unit, and then the product can be removed from the printing platform 2.

[0054] In summary, by slicing the 3D digital model, the printhead mechanism does not need to frequently adjust its filament ejection volume during the printing process, thereby improving the forming quality of the printed product, simplifying the control program, reducing the control difficulty of the printhead mechanism, and further increasing the printing speed of the 3D printer.

[0055] Second embodiment of the printing method of a 3D printer

[0056] Reference Figure 8 The difference between this embodiment and the first embodiment of the 3D printer printing method is that, in this embodiment, the printing unit further includes a curing mechanism 41, which is mounted on a support 42. The curing mechanism 41 preferably includes at least one of a curing agent nozzle module and a UV lamp. The spraying end of the curing agent nozzle module is positioned towards the surface of the printing platform to accelerate the curing speed of the printing consumables; the emitting end of the UV lamp is positioned towards the surface of the printing platform, and the UV lamp is used to irradiate the liquid printing consumables to accelerate the curing speed of the liquid printing consumables.

[0057] The curing mechanism 41 can be selected according to the type of the nozzle mechanism 43, such as:

[0058] When the printing consumable ejected by the printhead mechanism 43 is powder, the curing mechanism 41 can be selected as a curing agent printhead module; wherein, the curing agent printhead module and the printhead mechanism 43 can be integrated into one design, that is, the curing agent printhead module and the printhead mechanism 43 are integrated together.

[0059] When the printing consumables ejected by the printhead mechanism 43 are in droplet form, the curing mechanism 41 can be selected as a UV lamp. Of course, the curing mechanism 41 can also function as a curing agent printhead module and a UV lamp.

[0060] Third embodiment of the printing method of a 3D printer

[0061] The difference between this embodiment and the above embodiments is that in this embodiment:

[0062] The printing platform 51 is slidably connected to the frame 52. The printing platform 51 has a working position and a retracted position. When the 3D printer is performing a printing operation on the product to be printed, the printing platform 51 is in the working position. When the 3D printer has finished printing the product, the printing platform 51 can be moved to the retracted position so that the printed product can be removed from the printing platform 51. For example, ... Figure 9 As shown, the printing platform 51 can be slidably connected to the frame 52 in the height direction; correspondingly, the working position of the printing platform 51 is located between the retraction position and the screw 521, that is, the working position is located above the retraction position.

[0063] Furthermore, the 3D printer also includes a drive unit 53, which is mounted on the frame 52. The output end of the drive unit 53 is connected to the printing platform 51. The drive unit 53 is used to drive the printing platform 51 to move between the working position and the exit position.

[0064] For example, in this embodiment, the printing platform 51 has multiple slide rods 511 parallel to the height direction. The slide rods 511 are slidably connected to the frame 52. Each slide rod 511 is provided with a connecting part 513, and the connecting part 513 is provided with a second threaded hole 5131. The drive unit 53 includes a motor 531 and a lead screw 532. The lead screw 532 is parallel to the height direction. One end of the lead screw 532 is connected to the output shaft of the motor 531 so that the motor 531 can drive the lead screw 532 to rotate around its own second rotation axis. The lead screw 532 passes through the second threaded hole 5131 and is threadedly connected to the second threaded hole 5131, so that when the lead screw 532 rotates, it can drive the printing platform 51 to rise and fall through the second threaded hole 5131.

[0065] The printing method further includes: when the 3D printer is printing the product to be printed, before the nozzle mechanism 54 sprays printing consumables onto the printing platform 51, the drive unit 55 drives the printing platform 51 to move to the working position; after the product is printed, the drive unit 55 drives the printing platform 51 to move to the exit position.

[0066] Product Examples

[0067] The product is a three-dimensional product, wherein the product is printed by the printing method described in any one of the first to third embodiments of the printing method of the above-mentioned three-dimensional printer. The product printed by the printing method of the above-mentioned three-dimensional printer has better forming quality and faster forming speed.

[0068] Finally, it should be emphasized that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A printing method using a 3D printer, wherein the 3D printer comprises: A frame, on which a screw is provided, the screw being parallel to the height direction of the frame; A printing platform, which is mounted on the frame and located below the screw; The printing unit includes a support, a nozzle mechanism, and a drive mechanism. The support is mounted on the screw, and both the nozzle mechanism and the drive mechanism are mounted on the support. The nozzle's ejection end faces the surface of the printing platform, and the drive mechanism's output end is connected to the screw. The drive mechanism can drive the support to spirally rise or spirally descend along the screw. The printing method is characterized by comprising: The three-dimensional digital model to be printed is sliced ​​using a spiral cutting surface, and slice data is generated. The 3D printer acquires the slice data and drives the nozzle mechanism and drive mechanism according to the slice data; When the printhead mechanism sprays the printing material for the first printing layer, the spray volume of the printhead mechanism gradually increases from a first set value to a second set value. When the printhead mechanism sprays the printing material for the last printing layer, the spray volume of the printhead mechanism gradually decreases from the second set value to a third set value. When the printhead mechanism sprays the printing material for the intermediate layers other than the first and last printing layers, the spray volume of the printhead mechanism is the second set value.

2. The printing method according to claim 1, characterized in that: The pitch of the helical section is equal to the pitch of the screw.

3. The printing method according to claim 1, characterized in that: The first set value is zero; The third setting value is zero.

4. The printing method according to claim 1, characterized in that: In the extension direction of the screw, the nozzle mechanism has an initial position and a limit position. The initial position is located at the extended end of the screw, and the limit position is located between the initial position and the fixed end of the screw. The maximum distance between the initial position and the limit position is between one-third and one-half of the screw length.

5. The printing method according to claim 4, characterized in that: In the extending direction, the distance between the initial position and the platform is greater than the pitch of the screw.

6. The printing method according to claim 1, characterized in that: The nozzle mechanism has two or more nozzle groups, which are distributed along a first direction. Each nozzle group includes two or more nozzles, which are distributed along a second direction. Both the first direction and the second direction are perpendicular to the height direction.

7. The printing method according to any one of claims 1 to 6, characterized in that: The printing platform is slidably connected to the frame, and the printing platform has a working position and an exit position.

8. The printing method according to claim 7, characterized in that: The 3D printer also includes a drive unit, which is mounted on the frame. The output end of the drive unit is connected to the printing platform, and the drive unit can drive the printing platform to move between the working position and the exit position. The printing method further includes: Before the nozzle mechanism ejects printing consumables onto the printing platform, the drive unit drives the printing platform to move to the working position; After the product printing is completed, the drive unit drives the printing platform to move to the exit position.

9. The printing method according to any one of claims 1 to 6, characterized in that: The printing unit further includes a curing mechanism, which is mounted on the support and includes: Hardener spray nozzle module, wherein the spraying end of the hardener spray nozzle module is disposed facing the table surface; and / or An ultraviolet lamp, wherein the light-emitting end of the ultraviolet lamp is positioned facing the table surface.

10. A product, which is a three-dimensional product, characterized in that, The product is printed using the printing method described in any one of claims 1 to 9.

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