TWI680859B - Three dimensional printing method and three dimensional printing apparatus - Google Patents

Abstract

A three dimensional printing method and a three dimensional printing apparatus are provided. The three dimensional printing method includes following steps. A plurality of layer objects corresponding to three dimensional model of three dimensional object are obtained. A printing information of the plurality of layer objects is obtained, and a top surface area of the three dimensional object is determined according to the printing information. A first printing information of the top surface area in the printing information is obtained. A nozzle module is driven according to the printing information to print the three dimensional object. In the process of printing the three dimensional object, after printing the top surface layer is completed, the nozzle module is again driven to move over the top surface layer according to the first printing information to heat and melt a plurality of printing materials located in the top surface layer to a molten state to fill the gap between the plurality of printing materials.

Description

Three-dimensional printing method and three-dimensional printing device

The invention relates to a printing device, and in particular to a three-dimensional printing method and a three-dimensional printing device.

In recent years, with the development of science and technology, methods of constructing three-dimensional objects using additive manufacturing technologies such as layer-by-layer construction models have been proposed. In general, the basic principle is to use 3D computer-aided design (CAD) and other software to construct the design data of the 3D model, and convert it into a plurality of thin (quasi-two-dimensional) cross-sectional layers that are continuously stacked. The three-dimensional printing machine prints each cross-sectional layer in the XY plane horizontally, and displaces the thickness of the layer intermittently at the Z coordinate to form a three-dimensional object.

Take the fused deposition modeling (FDM) three-dimensional printing technology as an example. After heating and melting various hot-melt linear materials, the semi-fluid linear materials are extruded from the discharge hole of the nozzle, and according to The desired profile is on the platform Stacked layer by layer to form a three-dimensional object. Generally speaking, since the nozzle discharge hole of the three-dimensional printing device is approximately circular, when printing each line, the cross-section of the printed line is also approximately circular. When the lines are arranged in the shape of a circle to form the surface of the object, a large gap is generated between the printed lines, so that the surface of the three-dimensional object is more likely to appear uneven and uneven. As a result, the surface of the three-dimensional object is not close to a flat surface that was originally intended to be produced. Therefore, the surface of the three-dimensional object presents a significant roughness and reduces the printing quality of the three-dimensional printing object.

In view of this, the present invention provides a three-dimensional printing method and a three-dimensional printing device, which can reduce the gap between the printed lines, thereby achieving a smooth top surface of the three-dimensional object, thereby effectively improving the quality of three-dimensional printing.

The invention provides a three-dimensional printing method for a three-dimensional printing device. The three-dimensional printing device is used to print three-dimensional objects. The three-dimensional printing method includes the following steps. Acquire multiple slice objects corresponding to the three-dimensional model of the three-dimensional object. Get print information for multiple sliced objects. Determine the upper area of the three-dimensional object based on the printed information. Get the first print information of the upper area in the print information. Then, the nozzle module is driven according to the printing information to print the three-dimensional object. In the process of printing the three-dimensional object, after the upper layer area is printed, the nozzle module is driven to move on the upper layer area again according to the first printing information to heat the plurality of printing materials located in the upper layer area.

In an embodiment of the invention, in the above three-dimensional printing method, the plurality of layered objects include adjacent first layered objects and second layered objects. And the above The 3D printing method further includes the following steps. Obtain the second printing information of the first slice object and the third printing information of the second slice object in the print information. According to the second printing information and the third printing information, it is determined whether the first area in the first slice object is covered by at least a part of the second slice object. And when the first region in the first layered object is not covered by at least a part of the second layered object, the first region is determined to be the upper layer region.

In an embodiment of the invention, the above three-dimensional printing method further includes the following steps. Obtain the fourth printing information of the first area in the second printing information. Then, part of the fourth printed information is retrieved as the first printed information.

In an embodiment of the invention, the above three-dimensional printing method further includes the following steps. Drive the nozzle module according to the second printing information to print the first sliced object, and after the printing of the first sliced object is completed, perform the step of driving the nozzle module to move on the upper layer area again according to the first printing information .

In an embodiment of the present invention, the printing information includes the moving coordinates, moving speed of the nozzle module, and the output speed of the printing material. The above-mentioned first printing information includes moving coordinates and moving speed but does not include the output speed of the printed material.

In an embodiment of the present invention, in the step of printing a three-dimensional object, the bottom plane of the nozzle of the nozzle module will contact the printing material constituting the three-dimensional object, so that the top of the printing material produces a flattened plane .

In an embodiment of the present invention, the plurality of printing materials are heated to a slightly molten state to fill the gaps between the plurality of printing materials.

In an embodiment of the invention, the above three-dimensional printing method further includes the following steps. In the step of driving the nozzle module to move over the upper layer area again based on the first printing information, the temperature of the nozzle module is maintained at the same temperature as when printing multiple layered objects.

In an embodiment of the invention, the three-dimensional printing device is a fused deposition modeling three-dimensional printing device.

In an embodiment of the invention, the printing information is a G code file (G code).

The invention provides a three-dimensional printing device for printing three-dimensional objects. The three-dimensional printing device includes a nozzle module, a controller and a processor. The nozzle module is installed in the three-dimensional printing device. The controller is coupled to the nozzle module. The processor is coupled to the controller, and the processor is configured to obtain a plurality of slice objects corresponding to the three-dimensional model of the three-dimensional object. The processor is further used to obtain printing information of multiple sliced objects. The processor is further used to determine the upper area of the three-dimensional object according to the printed information. The processor is further used to obtain the first printing information in the upper layer of the printing information. Then, the controller is further used to drive the nozzle module according to the printing information to print the three-dimensional object. In the process of printing a three-dimensional object, when the upper layer area is printed, the controller is further used to drive the nozzle module to move on the upper layer area according to the first printing information to make multiple printing materials located in the upper layer area Heating.

In an embodiment of the invention, the plurality of slice objects include adjacent first slice objects and second slice objects. In the operation of determining the upper layer area of the three-dimensional object according to the printing information, the processor is further used to obtain the first slice object in the printing information The second print information of the and the third print information of the second slice object. And according to the second printing information and the third printing information, the processor is further used to determine whether the first area in the first slice object is at least a part of the second slice object Covered by. Then, when the first area in the first slice object is not covered by at least a part of the second slice object, the processor is further used to determine that the first area is the upper layer area.

In an embodiment of the present invention, in the operation of obtaining the first printing information of the upper layer area in the printing information, the processor is further used to obtain the fourth printing information of the first area in the second printing information. And the processor is further used to retrieve part of the fourth printing information as the first printing information.

In an embodiment of the present invention, in the operation of driving the head module according to the printing information to print the three-dimensional object, the controller is further used to drive the head module according to the second printing information to print the first slice object . And after the printing of the first layered object is completed, the controller is further used to perform the operation of again driving the nozzle module to move on the upper layer area according to the first printing information.

In an embodiment of the invention, the printing information includes the moving coordinates, moving speed of the nozzle module and the output speed of the printed material. The first printing information includes moving coordinates and moving speed but not the output speed of the printed material.

In an embodiment of the present invention, in the operation of printing a three-dimensional object, the bottom plane of the nozzle of the nozzle module will contact the printing material constituting the three-dimensional object, so that the top of the printing material produces a flattened plane .

In an embodiment of the present invention, a plurality of printing materials are thermally melted to be slightly melted Melt to fill gaps between multiple printed materials.

In an embodiment of the present invention, in the operation of driving the nozzle module to move over the upper layer area again according to the first printing information, the temperature of the nozzle module is maintained at the same temperature as when printing multiple layered objects.

In an embodiment of the invention, the three-dimensional printing device is a fused deposition modeling three-dimensional printing device.

In an embodiment of the invention, the printed information is a G code file (G code).

Based on the above, the three-dimensional printing method and the three-dimensional printing device of the present invention can fill the gap between the printed lines and make the gap less obvious, thereby achieving smoothing of the top surface of the three-dimensional object, thereby effectively improving the quality of the three-dimensional printing.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

100‧‧‧Three-dimensional printing device

110‧‧‧Host

111‧‧‧ processor

112‧‧‧Storage module

120‧‧‧Printing device

121‧‧‧Controller

122‧‧‧Platform

123‧‧‧ nozzle module

123a‧‧‧Sprinkler

123b‧‧‧Printing materials

123c‧‧‧Print out

200‧‧‧Three-dimensional object

210‧‧‧ First slice object

211‧‧‧Upper area

220‧‧‧Second slice object

400, 700 ‧‧‧ Printed materials

410~440, 410’~440’‧‧‧ printed materials

A0~AN、B0~BN‧‧‧Print information

D1~D3, D1’~D3’‧‧‧Gap

E, E _a2 , E _a3 , E _a5 , E _b1 ‧‧‧ Print material output speed

F, F _a0 ~ _Fan , F _b0 ~ F _bn ‧‧‧ Nozzle module moving speed

P1~P4, P1’~P4’ ‧‧‧ Print material plane

S502, S504, S506, S508, S510, S512 ‧‧‧ stereo printing method flow

X, X _a1 ~X _an , X _b1 ~X _bn ‧‧‧X axis moving coordinates

Y, Y _a1 ~Y _an , Y _b1 ~Y _bn ‧‧‧Y axis moving coordinates

Z, Z _a0, Z _b0 ‧‧‧Z coordinate axis

FIG. 1 is a block diagram of a three-dimensional printing device according to an embodiment of the invention.

2 is a schematic diagram of a three-dimensional printing device according to an embodiment of the invention.

3 is a schematic diagram of a nozzle of a three-dimensional printing device according to an embodiment of the invention.

4 is a schematic diagram of an example of a printing material according to an embodiment of the invention Figure.

5 is a flowchart of a three-dimensional printing method according to an embodiment of the invention.

FIG. 6 is an exemplary schematic diagram of a printing material according to an embodiment of the invention.

Some embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following description refers to element symbols. When the same element symbols appear in different drawings, they will be regarded as the same or similar elements. These examples are only a part of the present invention, and do not disclose all the embodiments of the present invention. Rather, these embodiments are only examples of the three-dimensional printing method and the three-dimensional printing device in the scope of the patent application of the present invention.

FIG. 1 is a block diagram of a three-dimensional printing device according to an embodiment of the invention. Please refer to FIG. 1. In this embodiment, the three-dimensional printing apparatus 100 includes a host 110 and a printing apparatus 120. The three-dimensional printing apparatus 100 is used to print a three-dimensional object according to the printing information of a three-dimensional model. In an embodiment, the three-dimensional printing apparatus 100 may be a fused deposition modeling three-dimensional printing apparatus. In this embodiment, the three-dimensional model may be a three-dimensional digital image file, which may be constructed by the host 110 through computer-aided design (CAD) or animation modeling software, for example.

Further, the host 110 is a device with a computing function, such as a notebook computer, a tablet computer, or a desktop computer, etc. The present invention does not The type of host 110 is restricted. The host 110 can edit and process the three-dimensional model and send related printing information to the printing device 120, so that the printing device 120 can print a three-dimensional object according to the printing information.

The host 110 includes a processor 111 and a storage module 112. The processor 111 is, for example, a central processing unit (Central Processing Unit, CPU), or other programmable general-purpose or special-purpose microprocessor (Microprocessor), digital signal processor (DSP), programmable Controllers, Application Specific Integrated Circuits (ASIC), Programmable Logic Devices (PLD) or other similar devices or combinations of these devices are not limited by the present invention.

The storage module 112 is, for example, fixed or removable random access memory (RAM), read-only memory (ROM), flash memory (flash memory), hard disk (hard disk) disk) or one or more combinations of other similar devices, and the storage module 112 records a plurality of instructions or programs that can be executed by the processor 111.

Specifically, the processor 111 further compiles and calculates the slice information of each slice object of the three-dimensional model to generate print information according to which the printing device 120 can execute the print function. In detail, when the processor 111 performs slice processing on the three-dimensional model, the three-dimensional model is vertically cut at a fixed interval of the slice plane, and the cross-sectional contour of each slice object is extracted. Next, the processor 111 takes the outer wall of the shape and appearance of the cross-sectional contour of each slice object as a closed contour structure, and fills the closed contour structure of each slice object with a line segment in a specific direction as an internal filling structure, thereby adjusting the printed product Strong degree.

Next, the processor 111 further generates a corresponding control code file according to the closed contour structure and the internal filling structure. Here, the control code file is the printing information that the printing device 120 can read and use to execute the printing function. In one embodiment, the printed information is, for example, a G code file (G code).

The printing device 120 is coupled to the host 110. The printing device 120 includes a controller 121, a platform 122 and a nozzle module 123. The printing device 120 prints the three-dimensional object according to the printing information transmitted by the host 110. In detail, the controller 121 controls the components of the printing device 120 according to the printing information to repeatedly print the printing material at a specific position until the entire three-dimensional object is generated.

2 is a schematic diagram of a three-dimensional printing device according to an embodiment of the invention. Please refer to FIG. 2, at the same time, a right-angle coordinate system is provided in order to describe related components and their motion states. In this embodiment, the head module 123 is disposed above the platform 122, and the head module 123 includes printing materials 123b and a head 123a. The printing material 123b may be a hot-melt wire suitable for fuse manufacturing. The head module 123 feeds the printing material 123b to the head 123a. The nozzle 123a heats the printing material 123b to a slightly molten state, and then extrudes the high-temperature, slightly molten printing material 123b through the nozzle 123a. At this time, the slightly melted printing material 123 b will solidify layer by layer on the supporting surface of the platform 122 to form a three-dimensional object 200.

Furthermore, the controller 121 is coupled to the processor 111 and to the platform 122 and the shower head module 123. The controller 121 controls the overall operation of the head module 123 according to the printing information to print out the three-dimensional object 200. For example, the controller 121 may Print information to control the moving path and moving speed of the head 123a, or control the output speed of the printing material 123b. The movement path of the shower head 123a is configured to move along the XY plane and along the normal direction (Z axis) of the XY plane. The controller 121 is, for example, a device with an arithmetic function such as a central processing unit, a chipset, a microprocessor, a microcontroller, etc. The present invention is not limited thereto.

3 is a schematic diagram of a nozzle of a three-dimensional printing device according to an embodiment of the invention. FIG. 4 is an exemplary schematic diagram of a printing material according to an embodiment of the invention. Please refer to FIGS. 2, 3 and 4 at the same time. In detail, when the print head 123a extrudes the printing material 123b into the high-temperature micro-melted printing output 123c, the printing output 123c will be placed on the platform one by one The bearing surface of 122 is cured to form printing materials 410-440. At this time, since the bottom area of the nozzle 123a is larger than the discharge hole of the nozzle 123a, when printing each printing material 410-440, the bottom plane of the nozzle 123a will contact the printing material 410-440, making the printing material 410 The top of ~440 produces flattened printing material planes P1~P4. In addition, gaps D1 to D3 are generated between the printed materials 410 to 440 after printing. These gaps D1~D3 will cause the three-dimensional object 200 to produce an uneven surface.

5 is a flowchart of a three-dimensional printing method according to an embodiment of the invention. The method of this embodiment is applicable to the three-dimensional printing apparatus 100 of FIG. 1. The detailed steps of the three-dimensional printing method in this embodiment are described below with the components of the three-dimensional printing apparatus 100. In order to facilitate the description of the present invention, FIG. 5 will continue to use the three-dimensional printing device 100 to print the three-dimensional object 200 of FIG. 2 as an example.

In step S502, the processor 111 obtains the stand corresponding to the three-dimensional object 200 Multiple slice objects of volume model. In this embodiment, after the processor 111 slices the three-dimensional model, the adjacent first slice object 210 and the second slice object 220 can be obtained.

In step S504, the processor 111 obtains printing information of a plurality of slice objects. Please refer to FIG. 2 and the following table 1 at the same time. The following table 1 is the printing information of the layered object in this embodiment. After the processor 111 slices the three-dimensional model of the three-dimensional object 200, it can generate the printing information of the three-dimensional object 200, wherein the printing information of the three-dimensional object 200 includes the printing information of each sliced object. As shown in Table 1, in this embodiment, the printing information of the three-dimensional object 200 includes the printing information A0-AN of the first slice object 210 and the printing information B0-BN of the second slice object 220. In one embodiment, the parameters of the printing information A0~AN of the first slice object 210 include the X-axis movement coordinates X _a1 ~X _{an of the} nozzle module 123, the Y-axis movement coordinates Y _a1 ~Y _an , and the Z-axis movement Coordinates _Za0 , the moving speed of the nozzle module _Fa0 ~ _Fan and the output speeds of the printing materials _Ea2 , _Ea3 and _Ea5 . Meanwhile, the parameters of the printing information B0~BN of the second slice object 220 include the X-axis moving coordinates X _b1 ~X _{bn of the} nozzle module 123, the Y-axis moving coordinates Y _b1 ~Y _bn , and the Z-axis moving coordinates Z _b0 , The moving speed of the nozzle module F _b0 ~ F _bn and the output speed of the printing material E _b1 .

In step S506, the processor 111 determines the upper layer area 211 of the three-dimensional object 200 according to the print information A0~AN, B0~BN. First, the processor 111 obtains the print information A0~AN of the first slice object 210 and the print information B0~BN of the second slice object 220. Then, the processor 111 determines whether an area in the first slice object 210 is covered by at least a part of the second slice object 220 according to the print information A0~AN and the print information B0~BN. When an area in the first slice object 210 is not covered by at least a part of the second slice object 220, the processor 111 determines that the area is an upper layer area.

Specifically, please refer to Figure 2 and Table 1 above. The three-dimensional object 200 has an adjacent first slice object 210 and a second slice object 220, and the print information of the first slice object 210 is print information A0~AN, and the print information of the second slice object 220 Print information B0~BN. After the processor 111 obtains the printing information A0~AN and the printing information B0~BN, the processor 111 determines whether there is any overlap between the vertical direction of the XY plane (Z axis) of the partial coordinates of the printing information A0~AN Print the coordinates of information B0~BN. If there is no overlapping coordinate above the partial coordinates of the printing information A0~AN, it means that the partial coordinates of the printing information A0~AN are not covered by the second slice object 220. The coordinates that are not covered by the second slice object 220 are, for example, the coordinates (X _a2 ,Y _a2 )~(X _a5 ,Y _a5 ) of the printed information A2~A5 in Table 1. At this time, the area printed from the print information A2 to A5 is determined as the upper layer area 211 by the processor 111. In another embodiment, the three-dimensional object 200 may have more layers of sliced objects, and the processor 111 determines the upper layer area of the three-dimensional object 200 according to the printing information of each sliced object, which is not limited in the present invention. In the present invention, the upper layer area 211 represents a horizontally upward area. As shown in FIG. 2, the horizontal refers to a plane perpendicular to the Z axis (that is, the XY plane), and the upward refers to the positive direction of the upper region 211 facing the Z axis. Relative to upward, downward refers to the negative direction of the upper region 211 facing the Z-axis, and then behaves as a horizontally hanging bottom surface or the bottommost surface of an object. In short, the upper layer area 211 represents the horizontally upward surface area of the three-dimensional object 200.

In step S508, the processor 111 obtains the first print information A2'~A5' of the upper layer area 211 in the print information A0~AN. The processor 111 obtains the printing information related to the upper layer area 211 among the printing information A1~AN of the first slice object 210, for example, the printing information A2~A5 in Table 1. And the processor 111 retrieves part of the print information A2~A5 as the first print information A2'~A5'. In an embodiment, the first printing information A2'~A5' part of the information retrieved from the printing information A2~A5 may be the moving coordinates and moving speed of the print head module 123, excluding the output of the printing material 123b speed. In detail, in this embodiment, the first printing information A2'~A5' is, for example, the X-axis moving coordinates X _a2 ~X _a5 and the Y-axis moving coordinates Y _a2 of the nozzle module 123 in the printing information A2~A5 ~Y _a5 and the moving speed of the print head module F _a2 ~F _a5 excluding the print material output speeds E _a2 , E _a3 , E _a5 .

In step S510, the controller 121 drives the nozzle module 123 to print the three-dimensional object 200 according to the printing information A0~AN, B0~BN. In this embodiment, the processor 111 transmits the print information A0~AN of the first slice object 210 and the print information B0~BN of the second slice object 220 in Table 1 to the controller 121, and the controller 121 The print head module 123 is driven to print the three-dimensional object 200 according to the printing information A0~AN and B0~BN. In one embodiment, the printing information A0~AN and B0~BN include the X-axis moving coordinate X, Y-axis moving coordinate Y, Z-axis moving coordinate Z of the nozzle module 123, the nozzle module moving speed F, and the printing material Output speed E.

Then, in the process of printing the three-dimensional object 200, in step S512, after the upper layer area 211 is printed, the controller 121 drives the nozzle module 123 in the upper layer area again according to the first printing information A2'~A5' 211 moves upward to heat the plurality of printing materials located in the upper layer region 211 to a slightly molten state to fill the gaps between the plurality of printing materials. In another embodiment, the processor 111 may drive the nozzle module 123 to move on the upper layer area 211 again according to the first printing information A2'~A5' after the first layered object 210 is printed. The present invention is not limited to this.

Specifically, please refer to FIG. 2, FIG. 4 and FIG. 6 at the same time. FIG. 6 is an exemplary schematic diagram of a printing material according to an embodiment of the invention. Please refer to FIG. 4 first. In this embodiment, the printing materials 410 to 440 in the printing material partial region 400 are the printing lines of the upper layer region 211. The printing material of the upper layer area 211 The materials 410-440 each have gaps D1-D3, and the printing materials 410-440 each have printing material planes P1-P4. Please refer to FIG. 2 again. In this embodiment, when the controller 121 drives the nozzle module 123 to move on the upper layer area 211 of the first layered object 210 again according to the first printing information A2'~A5', the nozzle The nozzle 123a of the module 123 will pass through the printed materials 410-440 once printed. It should be noted that, in this embodiment, the first printing information A2'~A5' does not include the printing material output speed E, so the print head 123a is printed again according to the first printing information A2'~A5' When the printed materials 410~440 are completed, the printed materials 123b will not be output.

Furthermore, the printing materials 410-440 near the printing material planes P1~P4 near the nozzle 123a will be heated to a slightly molten state by the nozzle 123a and expand to both sides to fill the gap between the printing materials 410-440 D1~D3. For example, in the printing material partial region 700 in FIG. 6, the printing materials 410-440 are heated and slightly melted into the printing materials 410′-440′, and the printing material planes P1~P4 expand to both sides due to the heating Print the material plane P1'~P4'. At the same time, the gaps D1~D3 between the printing materials 410~440 are reduced to the gaps D1'~D3'. In this way, the top surface of the upper layer region 211 can be smoothed, and the quality of three-dimensional printing can be improved. In one embodiment, when the controller 121 drives the nozzle module 123 to move on the upper layer area 211 again according to the first printing information A2'~A5', the temperature of the nozzle module 123 is maintained and the first slice object is printed The temperature at 210 is the same.

In summary, the three-dimensional printing method and the three-dimensional printing device of the present invention can reduce the gap between the printed lines without destroying the printed lines, thereby achieving the smoothing of the top surface of the three-dimensional object, thereby effectively improving Three-dimensional printing quality.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

S502, S504, S506, S508, S510, S512 ‧‧‧ stereo printing method flow

Claims (20)

A three-dimensional printing method is used for a three-dimensional printing device for printing a three-dimensional object. The three-dimensional printing method includes: acquiring a plurality of three-dimensional models corresponding to the three-dimensional object Cutting object; obtaining the printing information of the plurality of cutting objects; judging the upper region of the three-dimensional object according to the printing information; obtaining the first printing information of the upper region in the printing information; And driving the nozzle module according to the printing information to print the three-dimensional object, wherein during the printing of the three-dimensional object, after the upper layer area is printed, the first printing information is used again The printing head module is driven to move on the upper layer region to heat a plurality of printing materials located in the upper layer region. The three-dimensional printing method as described in item 1 of the patent application range, wherein the plurality of layered objects include adjacent first layered objects and second layered objects, wherein the three-dimensional printing is determined according to the printing information The step of the upper layer area of the object includes: acquiring the second printing information of the first sliced object and the third printing information of the second sliced object in the printing information; according to the second printing Information and the third printing information to determine whether the first area in the first slice object is covered by at least a part of the second slice object; and when the first area in the first slice object When the first area is not covered by at least a part of the second slice object, it is determined that the first area is the upper area. The three-dimensional printing method according to item 2 of the patent application scope, wherein the step of acquiring the first printing information of the upper layer region in the printing information includes: acquiring the second printing information The fourth printing information of the first area; and extracting part of the fourth printing information as the first printing information. The three-dimensional printing method according to item 3 of the patent application scope, wherein the step of driving the nozzle module according to the printing information to print the three-dimensional object includes: driving the nozzle module according to the second printing information Group to print the first layered object, and after the first layered object is printed, execute the driving of the nozzle module to move on the upper layer area again according to the first printing information step. The three-dimensional printing method as described in item 1 of the patent scope, wherein the printing information includes the moving coordinates, moving speed of the nozzle module, and the output speed of the printing material, the first printing information It includes the moving coordinates and the moving speed but does not include the output speed of the printed material. The three-dimensional printing method as described in item 1 of the patent application range, wherein in the step of printing the three-dimensional object, the bottom plane of the nozzle of the nozzle module will meet the printing material constituting the three-dimensional object The contact causes a flattened flat surface on the top of the printing material. The three-dimensional printing method as described in item 1 of the patent application range, wherein the printing material is heated to a slightly molten state to fill the gap between the printing materials. The three-dimensional printing method as described in item 1 of the patent application scope, wherein in the step of driving the nozzle module to move over the upper layer area again according to the first printing information, the temperature of the nozzle module Maintain the same temperature as when printing the multiple layered objects. The three-dimensional printing method as described in item 1 of the patent application range, wherein the three-dimensional printing device is a fused deposition modeling three-dimensional printing device. The three-dimensional printing method as described in item 1 of the patent application scope, wherein the printing information is a G code file (G code). A three-dimensional printing device is used to print a three-dimensional object. The three-dimensional printing device includes: a nozzle module installed in the three-dimensional printing device; a controller coupled to the nozzle module; and A processor coupled to the controller, the processor is configured to obtain a plurality of slice objects corresponding to a three-dimensional model of the three-dimensional object, and the processor is further used to obtain the plurality of cut objects The printing information of the layer object, the processor is further used to determine the upper layer area of the three-dimensional object according to the printing information, the processor is further used to obtain the first of the upper layer area in the printing information Printing information, and the controller is used to drive the nozzle module to print the three-dimensional object according to the printing information, wherein during the printing of the three-dimensional object, when the upper layer printing is completed Afterwards, the controller is further used to drive the nozzle module to move on the upper layer area again according to the first printing information to heat the plurality of printing materials located in the upper layer area. The three-dimensional printing device according to item 11 of the patent application scope, wherein the plurality of layered objects include adjacent first layered objects and second layered objects, wherein the three-dimensional printing is determined based on the printing information During the operation of the upper layer area of the object, the processor is further used to obtain the second printing information of the first slice object and the third printing information of the second slice object in the print information, According to the second printing information and the third printing information, the processor is further used to determine whether the first area in the first slice object is occupied by at least a part of the second slice object Coverage, and when the first area in the first slice object is not covered by at least a portion of the second slice object, the processor is further used to determine that the first area is the Upper area. The three-dimensional printing device according to item 12 of the patent application scope, wherein in the operation of acquiring the first printing information of the upper layer area in the printing information, the processor is further used to acquire the first printing information In the second printing information, the fourth printing information of the first area, and the processor is further used to retrieve part of the fourth printing information as the first printing information. The three-dimensional printing device as described in item 13 of the patent application range, wherein the controller is further used to drive the nozzle module to print the three-dimensional object according to the printing information. The second printing information drives the nozzle module to print the first sliced object, and after the printing of the first sliced object is completed, the controller is further configured to execute the printing according to the first The information again drives the movement of the nozzle module on the upper layer area. The three-dimensional printing device according to item 11 of the patent application scope, wherein the printing information includes the moving coordinates, moving speed of the nozzle module, and the output speed of the printing material, the first printing information It includes the moving coordinates and the moving speed but does not include the output speed of the printed material. The three-dimensional printing device as described in item 11 of the patent application range, wherein in the operation of printing the three-dimensional object, the bottom plane of the nozzle of the nozzle module will interact with the printing material constituting the three-dimensional object The contact causes a flattened flat surface on the top of the printing material. The three-dimensional printing device according to item 11 of the patent application range, wherein the printing material is heated to a slightly molten state to fill the gap between the printing materials. The three-dimensional printing device as described in item 11 of the patent application range, in which the temperature of the head module is in operation of driving the head module to move over the upper area again based on the first printing information Maintain the same temperature as when printing the multiple layered objects. The three-dimensional printing device as described in item 11 of the patent application range, wherein the three-dimensional printing device is a fused deposition modeling three-dimensional printing device. The three-dimensional printing device as described in item 11 of the patent application scope, wherein the printing information is a G code file (G code).

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