CN116141682A

CN116141682A - 3D printing equipment, printing control method and device

Info

Publication number: CN116141682A
Application number: CN202310204301.5A
Authority: CN
Inventors: 吕如松; 黄雅滢; 蒋韦; 沈为真
Original assignee: Zhuhai Sailner 3D Technology Co Ltd
Current assignee: Zhuhai Sailner 3D Technology Co Ltd
Priority date: 2023-03-03
Filing date: 2023-03-03
Publication date: 2023-05-23

Abstract

The application provides 3D printing equipment, a printing control method and a device, wherein the 3D printing equipment can determine the printing mode of a 3D model according to model data, and the temperature regulation and control modes used under different printing modes are different, so that the 3D printing equipment can print the 3D model according to the printing mode, the printing control of the 3D model can be more timely, accurately and effectively performed, the temperature uniformity of a model area in the printing process of the 3D model is improved, and the printing quality and the printing success rate of the 3D model are further improved.

Description

3D printing equipment, printing control method and device

Technical Field

The application relates to the technical field of 3D printing, in particular to 3D printing equipment, a printing control method and a printing control device.

Background

The 3D printing apparatus is a printing apparatus that can print a 3D model. Some 3D printing devices may print a 3D model by a polymer powder three-dimensional molding technique, and the 3D printing device may form a powder material layer by providing a powder material and spraying a liquid material onto the powder material layer to form one slice layer of the 3D model. Thereby forming a 3D model in a mode of stacking slice layers layer by layer.

In the prior art, since the cross-sectional shapes and/or the area sizes of the slice layers of the 3D model are different, the 3D printing apparatus has different temperatures of the model areas when printing different slice layers of the 3D model layer by layer. In order to ensure the quality of the finally formed 3D model, a temperature sensor and a radiation source such as an infrared lamp are installed in the 3D printing equipment, wherein the temperature sensor is used for detecting the temperature of the slice layer model area, so that the 3D printing equipment can control the radiation source according to the temperature of actual requirements, for example, the radiation power of the radiation source is increased, and the like.

However, in the prior art, the temperature sensor detects the temperature of the model area, and the 3D printing device controls the radiation source to provide radiation to the model area according to the detected temperature, so that the temperature rises to the actual required temperature for a long time, and the 3D printing device cannot timely and effectively print the temperature of the slice model area in the printing process, so that the printing quality and the printing success rate of the 3D model are reduced.

Disclosure of Invention

The application provides 3D printing equipment, a printing control method and a printing control device, and aims to solve the technical problems that when 3D models are printed by the 3D printing equipment in the prior art, printing quality and printing success rate are low due to incapability of timely and effective printing control.

A first aspect of the present application provides a print control method of a 3D printing apparatus, including: obtaining model data of a 3D model to be printed; determining a printing mode of the 3D model according to the model data; the printing mode comprises one of a first printing mode and a second printing mode, and the 3D printing equipment is different in temperature regulation mode used in the first printing mode and the second printing mode; and sequentially printing at least one slice layer of the 3D model according to the model data and the printing mode to obtain the 3D model.

In an embodiment of the first aspect of the present application, the print mode of the 3D model includes a print mode of at least one slice layer of the 3D model.

In an embodiment of the first aspect of the present application, the sequentially printing at least one slice layer of the 3D model according to the model data and the printing mode, to obtain the 3D model includes: and printing each slice layer in the at least one slice layer in turn according to the printing mode of each slice layer in the at least one slice layer and the layer model data of each slice layer in the model data to obtain the 3D model.

In an embodiment of the first aspect of the present application, the determining the printing mode of the 3D model according to the model data includes: and receiving a printing mode of the 3D model determined by a user according to the model data through an operation interface.

In an embodiment of the first aspect of the present application, the determining the printing mode of the 3D model according to the model data includes: and matching the model data with preset model data stored in a database to obtain a printing mode of the 3D model.

In an embodiment of the first aspect of the present application, the determining the printing mode of the 3D model according to the model data includes: determining at least one slice layer of the 3D model; and determining the printing mode of the at least one slice layer according to the layer model data of the at least one slice layer.

In an embodiment of the first aspect of the present application, the determining, according to the layer model data of the at least one slice layer, a print mode of the at least one slice layer includes: matching layer model data of each slice layer in the at least one slice layer with preset layer model data stored in a database to obtain a printing mode of the at least one slice layer; or determining an image contour of the at least one slice layer according to layer model data of the at least one slice layer; matching the image contour of each slice layer in the at least one slice layer with the contour of a preset model layer stored in a database to obtain a printing mode of the at least one slice layer; or determining the area of the at least one slice layer according to the layer model data of the at least one slice layer; and obtaining the printing mode of the at least one slice layer according to the area of each slice layer in the at least one slice layer.

In an embodiment of the first aspect of the present application, the sequentially printing at least one slice layer of the 3D model according to the model data and the printing mode, to obtain the 3D model includes: determining layer image data for each of the at least one slice layer based on the model data and the print mode; wherein the layer image data comprises layer image data of a model area and layer image data of a heat preservation area, or the layer image data comprises layer image data of the model area; determining print data of the 3D model according to layer image data of each of the at least one slice layer; and sequentially printing at least one slice layer of the 3D model according to the printing data to obtain the 3D model.

In an embodiment of the first aspect of the present application, before determining the layer image data of each of the at least one slice layer according to the model data and the print mode, the method further includes: when the print mode is determined to be the first print mode, determining the print mode of at least one previous sliced layer to be the first print mode.

In an embodiment of the first aspect of the present application, the previous slice layer includes a slice layer within N layers before the current slice layer, n+.50.

In an embodiment of the first aspect of the present application, before determining the layer image data of each of the at least one slice layer according to the model data and the print mode, the method further includes: when the printing mode is the second printing mode, determining the printing modes of a designated number of subsequent slice layers; and when the printing mode of at least one later slice layer in the designated number of later slice layers is the first printing mode, determining the printing mode of the current slice layer as the first printing mode.

In an embodiment of the first aspect of the present application, the later slice layer includes a slice layer within M layers after the current slice layer, M is less than or equal to 50.

In an embodiment of the first aspect of the present application, when the print mode is determined to be the first print mode, the layer image data includes layer image data of a model area and layer image data of a thermal insulation area, and the print data includes layer print data of the model area and layer print data of the thermal insulation area; when the print mode is determined to be the second print mode, the layer image data includes layer image data of a model area, and the print data includes layer print data of the model area.

In an embodiment of the first aspect of the present application, the sequentially printing at least one slice layer of the 3D model according to the print data, to obtain the 3D model includes: for each of the at least one sliced layer, forming a powder material layer with a powder material and spraying a liquid material on the powder material layer according to the print data to form the sliced layer, thereby obtaining the 3D model according to the at least one sliced layer formed.

In an embodiment of the first aspect of the present application, when the print mode is determined to be a first print mode, the spraying the liquid material on the powder material layer according to the print data forms the sliced layer, including: spraying a first liquid material on the powder material layer according to layer printing data of a model area of the slice layer, and spraying a second liquid material according to layer printing data of a heat preservation area of the slice layer to form the slice layer; wherein the first liquid material and the second liquid material are different liquid materials; alternatively, the first liquid material and the second liquid material are the same liquid material, and the amount of the second liquid material ejected per unit area is lower than the amount of the first liquid material ejected.

In a first embodiment of the first aspect of the present application, the second liquid material is a heat storage material.

In an embodiment of the first aspect of the present application, when the printing mode is determined to be the second printing mode, the spraying the liquid material on the powder material layer according to the printing data forms the sliced layer, including: the sliced layer is formed by jetting a first liquid material onto the powder material layer according to layer print data of a model area of the sliced layer.

In an embodiment of the first aspect of the present application, the spraying of the liquid material on the powder material layer is preceded by providing radiation to the powder material layer to preheat the powder material layer; and/or, the spraying of the liquid material on the powder material layer further comprises providing radiation to the powder material layer to form a solidified slice layer.

In a first embodiment of the first aspect of the present application, a gap is provided between the mold region and the soak region.

A second aspect of the present application provides a 3D printing apparatus comprising control means for performing the method according to any of the first aspects of the present application.

A third aspect of the present application provides a print control apparatus of a 3D printing device for performing the method according to any one of the first aspects of the present application.

A fourth aspect of the present application provides an electronic device, comprising: at least one processor and memory; the memory stores computer instructions; the at least one processor, when executing the computer instructions stored by the memory, performs the method according to any one of the first aspects of the present application.

A fifth aspect of the present application provides a computer readable storage medium having stored therein computer instructions which, when executed by a processor, implement a method according to any of the first aspect of the present application.

A sixth aspect of the present application provides a computer program product comprising a computer program which, when executed, implements a method as claimed in any one of the first aspects of the present application

In summary, the 3D printing device, the printing control method and the printing control device provided by the application enable the 3D printing device to determine the printing mode of the 3D model according to the model data in advance before printing the 3D model. When the 3D printing apparatus is printing the 3D model, the 3D model may be printed directly according to the model data and the printing mode determined in advance. Because the temperature regulation and control modes used under different printing modes are different, the printing control according to the printing modes can be more timely, accurately and effectively performed on the 3D model, and the temperature uniformity of the model area in the 3D model printing process is improved. Meanwhile, as the temperature regulation and control can be performed through the printing mode determined by the model data of the 3D model, the frequency of printing control of a control device in the 3D printing equipment according to the temperature detected by the temperature sensor is reduced, the precision requirement on the temperature sensor is reduced, and the production and manufacturing cost of the 3D printing equipment is saved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a 3D printing apparatus provided in the present application;

fig. 2 is a flowchart of an embodiment of a print control method of a 3D printing apparatus provided in the present application;

FIG. 3 is a schematic diagram of an operation interface provided in the present application;

FIG. 4 is a schematic diagram of a correspondence between model data and a print mode provided in the present application;

FIG. 5 is a schematic diagram of a correspondence between layer model data and print modes provided in the present application;

FIG. 6 is a schematic diagram of a correspondence between a model layer profile and a print mode provided in the present application;

fig. 7 is a flowchart of another embodiment of a print control method of a 3D printing apparatus provided in the present application;

FIG. 8 is a schematic diagram of a 3D model provided herein;

FIG. 9 is a schematic diagram of layer image data for a first print mode provided herein;

FIG. 10 is a schematic diagram of another layer image data of a first print mode provided herein;

FIG. 11 is a schematic illustration of another layer image data of a second print mode provided herein;

fig. 12 is a schematic structural diagram of a print control apparatus of a 3D printing device provided in the present application;

fig. 13 is a schematic structural diagram of a print control apparatus of another 3D printing device provided in the present application;

fig. 14 is a schematic structural diagram of a printing control device of still another 3D printing apparatus provided in the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of operation in sequences other than those illustrated or described herein, for example. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The numbers in the flowcharts of the application have no size or sequence division, and are only used for distinguishing the steps to be expressed, so that the technical scheme of the application is easy and clear to express. The technical scheme of the present application is described in detail below with specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

The application provides a 3D printing device and a printing control method applied to the 3D printing device, wherein the 3D printing device can be a 3D printer. The 3D printing device may be used to print a 3D model, and the embodiment of the present application does not limit the shape, structure, and the like of the 3D model that the 3D printing device may print.

Fig. 1 is a schematic structural diagram of a 3D printing apparatus provided in the present application, where the 3D printing apparatus A0 shown in fig. 1 includes: the powder spreading module 4, the forming platform 31 and the spraying module 5 are connected with the control device 9.

Wherein the modeling platform 31 is used to support the 3D model to be printed.

The powder spreading module 4 is used for providing powder material to form a layer L0 of powder material on the forming table.

The inkjet module 5 is used to eject liquid material on the powder material layer L0 to form one slice layer of the 3D model.

The control device 9 is used to control the powder spreading module 4 to perform a powder spreading operation to form the powder material layer L0, and to control the inkjet module 5 to perform an operation of ejecting a liquid material. The control means 9 may be used to control the 3D printing device A0 to print the 3D model. For example, the control device 9 may be an electronic device such as a computer, a server, or a workstation, or the control device 9 may also be a processing device such as a processor CPU, MCU, SOC provided in the 3D printing apparatus A0.

In one embodiment, the 3D printing apparatus A0 further includes a lifting mechanism 41, the lifting mechanism 41 being connected with the forming platform 31. The lifting mechanism may be used to drive the modeling platform 31 to move in the vertical direction in fig. 1. The modeling stage 31 is located at a designated position, and the control device 9 controls the powder spreading module 4 to form a powder material layer L0 on the modeling stage 31, and controls the inkjet module 5 to selectively spray a liquid material on the powder material layer L0 to form a slice layer of the 3D model at the designated position. Subsequently, the shaping platform 31 is moved down in the vertical direction by a distance of a specified layer thickness in fig. 1, and the control device 9 continues to control the powder spreading module 4 and the ink jet module 5 to perform the powder spreading and ink jet actions after each movement of the shaping platform 31, so that one slice layer of the 3D model is formed at each position, and the slice layers formed at all positions are stacked one on top of the other to form a complete 3D model.

In one embodiment, the powdering module 4 includes: a powder storage cavity 23, a lifting mechanism 22 and a powder spreader 21. The powder storage cavity 23 is used for storing the powder material 0, a movable supporting plate 231 is arranged in the powder storage cavity 23, and the lifting mechanism 22 is connected with the supporting plate 231 and can drive the supporting plate 231 to lift or descend in the vertical direction in fig. 1. The powder spreader 21 is for moving in the left-right direction in fig. 1, and when the powder spreader 21 moves from the left-right direction in fig. 1, the powder spreader can be used to spread the powder material 0 stored in the powder storage chamber 23 onto the molding platform 3 to form the powder material layer L0. The conventional powder spreader 21 may be a powder spreading rod or a scraper, etc.

In one embodiment, the inkjet module 5 comprises: a print head 26. Specifically, the printhead 26 includes at least two arrays of orifices, each array of orifices for ejecting a liquid material. In fig. 1, the printhead 26 includes two arrays of orifices, denoted as a first array of orifices 26a and a second array of orifices 26b, as an example. Wherein the first nozzle hole array 26a is used for jetting the first liquid material a, and the second nozzle hole array 26B is used for jetting the second liquid material B. The control means 9 may be used to control the selective ejection of the first array of orifices 26a and the second array of orifices 26b of the print head 26 on the layer of powder material L0 to form one sliced layer of the 3D model to be printed.

In one embodiment, the first liquid material a and the second liquid material B may be stored in different material reservoirs, respectively. For example, the material reservoir may be an ink cartridge. Each material reservoir delivers a first liquid material a and a second liquid material B, respectively, via a different liquid material delivery line.

In one embodiment, first orifice array 26a and second orifice array 26b may be one multi-channel printhead integrated together, or first orifice array 26a and second orifice array 26b may be two multi-channel printheads. Each multi-channel printhead includes at least two rows of orifices, such as 2 rows, 3 rows, 4 rows, etc., or two single-channel printheads, etc., and the specific implementation of the orifice array is not limited in the embodiments of the present application.

In one embodiment, the 3D model printing apparatus further comprises an energy radiation module 7. The energy radiation module 7 includes one or both of a preheating part 51 and a heating part 52.

The preheating part 51 is used to provide radiant or thermal energy to preheat the powder material layer L0, thereby helping the solidification of the first liquid material and the powder material in contact with the first liquid material in the mold area to form the sliced layers of the 3D mold. The preheating part 51 may include at least one of an ultraviolet lamp, an infrared lamp, a microwave emitter, a heating wire, a heating sheet, and a heating plate.

The heating part 52 is used to heat the powder material layer L0 sprayed with the liquid material after the first liquid material and/or the second liquid material is sprayed from the print head 26, and the heating part 52 may include at least one of an ultraviolet lamp, an infrared lamp, a microwave emitter, a heating wire, a heating sheet, and a heating plate.

In one embodiment, the heating element 52 provided in the 3D printing device A0 is related to the kind of the first liquid material. For example, when the first liquid material is a photopolymerization-generating liquid material, the heating element 52 may be an ultraviolet lamp operable to provide radiant energy, such as ultraviolet radiation, to initiate photopolymerization of the photocurable component in the first liquid material by the ultraviolet radiation. When the first liquid material is a liquid material in which thermal polymerization occurs or a liquid material in which thermal radiation is absorbed, the heating member 52 may include at least one of an infrared lamp, a microwave, a heating wire, a heating sheet, and a heating plate, and may be used to supply heat energy to melt-mold a powder material in contact with the first liquid material by heat energy to induce thermal polymerization of a heat curing component in the first liquid material or by heat energy to convert the thermal radiation absorbed by the thermal radiation absorbing component in the first liquid material into heat energy.

In one embodiment, the preheating part 51 may be installed above the forming table 31. For example, the preheating part 51 may be installed at the top of the molding chamber 10 of the 3D printing apparatus A0. When the energy radiation module 7 includes the preheating part 51 and the heating part 52, the preheating part 51 is installed at the top of the molding chamber 10, and the heating part 52, the print head 26, and the heating part 52 are sequentially installed on the guide rail 11 and can move on the guide rail 11 in the left-right direction in fig. 1. Alternatively, the preheating component 51 is mounted on top of the forming chamber 10 and the heating component 52 is located on one side of the printhead 26.

In one embodiment, the 3D printing apparatus A0 further comprises a temperature monitor for monitoring the temperature of the powder material layer L0. The temperature monitor may be used to send the monitored temperature information to the control device 9, which may control the intensity of the energy provided by the preheating part 51 and/or the heating part 52 based on the temperature information.

Based on the 3D printing equipment shown in fig. 1, the application further provides a printing control method of the 3D printing equipment, which can print the 3D model in different printing modes according to the model data of the 3D model to be printed, so as to solve the technical problems of lower printing quality and lower printing success rate caused by incapability of timely and effective printing control when the 3D printing equipment prints the 3D model in the prior art.

The printing control method of the 3D printing apparatus according to the embodiment of the present application is described below with reference to the accompanying drawings, and the printing control method according to the embodiment of the present application may be applied to the 3D printing apparatus shown in fig. 1, and is specifically executed by the control device 9. Or, the printing control method of the 3D printing device provided by the embodiment of the application may also be applied to other 3D printing devices. The present embodiment will be described taking the control device 9 of which the execution subject of the print control method is the 3D printing apparatus as an example.

Fig. 2 is a flowchart of an embodiment of a print control method of a 3D printing apparatus provided in the present application. The print control method as shown in fig. 2 includes:

s101: model data of the 3D model to be printed is acquired.

In one embodiment, the control device may acquire the model data of the 3D model to be printed through a data acquisition module or the like provided for receiving the model data. Or, after the control device scans the entity model corresponding to the 3D model to be printed through the connected scanner, the control device performs three-dimensional reconstruction so as to obtain model data of the 3D model. Alternatively, the control device may also download model data of the 3D model from the data platform. Alternatively, the control device may also draw model data of the 3D model to be printed. Or there may be other ways, not specifically recited herein.

In one embodiment, the data format of the model data of the 3D model provided in the embodiments of the present application may include a data format with color attribute and a data format without color attribute. For example, the data format of the color attribute may be PLY format, OBJ format, AMF format, 3MF format, VRML format, or the like. The data format without color attributes may be STL format, RPI format, etc. The model data in the data format with color attribute includes the structure information of the model and the attribute information of the model. The attribute information of the model is selected from one of a color attribute of the model and a mechanical property attribute of the model. The color attribute of the model is also called color information of the model, specifically, the surface color of the model, such as red, yellow, green, purple, etc. The mechanical property attribute of the model is also called mechanical property information of the model, and specifically refers to the surface material of the model, such as soft, hard and the like. The structural information of the model includes the geometry of the model.

S102: and determining the printing mode of the 3D model according to the model data.

Specifically, the control device determines a printing mode in which the 3D printing device prints the 3D model according to the model data of the 3D model acquired in S101.

Wherein the print mode includes one of a first print mode and a second print mode. The 3D printing apparatus uses a different temperature regulation manner in the first printing mode and a different temperature regulation manner in the second printing mode.

In one embodiment, the first print mode and the second print mode are performed by the 3D printing device in different print jobs. Wherein different sub-print jobs correspond to different print processes, the execution of the first print mode and the second print mode in the different sub-print jobs specifically means that only one print mode is executed in one sub-print job, for example, the 3D printing device executes the first print mode when printing one 3D model and the second print mode when printing the other 3D model. That is, the 3D printing apparatus performs only one of the first printing mode or the second printing mode in the same print job.

In another embodiment, the first printing mode and the second printing mode are performed by the 3D printing device during printing of different sliced layers of the 3D model in the same print job. Specifically, for the 3D printing device to print slice layers of the 3D model layer by layer, when printing one 3D model, the 3D printing device executes one printing mode in the printing process of different slice layers. For example, the 3D printing apparatus performs a first printing mode when printing a partial slice layer of one 3D model, and performs a second printing mode when printing another partial slice layer of the one 3D model. At this time, the print mode of the 3D model determined by the control device in S102 specifically includes a print mode of each of at least one slice layer of the 3D model.

S103: and sequentially printing at least one slice layer of the 3D model according to the model data and the printing mode to obtain the 3D model.

Specifically, the control device sequentially prints each slice layer of at least one slice layer of the 3D model according to the model data determined in S101 and the print mode determined in S102, to obtain the 3D model.

In one embodiment, when the first printing mode and the second printing mode are executed by the 3D printing apparatus in different print jobs, the control device sequentially prints each slice layer of the at least one slice layer of the 3D model according to the layer model data of each slice layer of the at least one slice layer of the 3D model and one of the first printing mode or the second printing mode to obtain the 3D model in S103. At this time, the print mode of each slice layer of the 3D model is the same.

In another embodiment, when the first printing mode and the second printing mode are executed by the 3D printing device in different layer printing processes in the same print job, the control device sequentially prints each slice layer in at least one slice layer of the 3D model according to the layer model data of each slice layer in the at least one slice layer of the 3D model and the printing mode corresponding to each slice layer, so as to obtain the 3D model. At this time, the printing mode of each slice layer of the 3D model may be different, and since the 3D printing device may print each slice layer according to the printing mode of each slice layer, the printing process of the 3D printing device has a higher granularity, which improves the refinement degree of the 3D printing device when printing the 3D model, and further improves the printing quality of the 3D model printed by the 3D printing device.

In summary, the control method of the 3D printing apparatus provided in the present embodiment enables the 3D printing apparatus to determine, in advance, a printing mode of the 3D model according to the model data before printing the 3D model. When the 3D printing apparatus is printing the 3D model, the 3D model may be printed directly according to the model data and the printing mode determined in advance. Because the temperature regulation and control modes used under different printing modes are different, the printing control of the 3D model can be more timely, accurate and effective according to the printing modes, and the temperature uniformity of the model area in the 3D model printing process is improved, so that the printing quality and the printing success rate of the 3D model printed by the 3D printing equipment are improved. Meanwhile, as the temperature regulation and control can be performed through the printing mode determined by the model data of the 3D model, the frequency of printing control of a control device in the 3D printing equipment according to the temperature detected by the temperature sensor is reduced, the precision requirement on the temperature sensor is reduced, and the production and manufacturing cost of the 3D printing equipment is saved.

A specific implementation manner of the step of determining the print mode of the 3D model according to the model data in S102 of the print control method of the 3D printing apparatus provided in the embodiment of the present application will be described below with reference to the accompanying drawings.

In one embodiment, when the first print mode and the second print mode are performed by the 3D printing device in different print jobs, the print modes include print modes of the entire 3D model. The control device may receive a print mode of the 3D model determined by a user according to model data of the 3D model through the operation interface. For example, fig. 3 is a schematic diagram of an operation interface provided in the present application. The operation interface as shown in fig. 3 may be provided by a control device of the 3D printing apparatus. For example, the control device 9 of the 3D printing apparatus may be connected to a display device 901 such as a display, and display information corresponding to two printing modes through an operation interface provided by the display. Subsequently, the control device of the 3D printing apparatus receives a print mode determined by the user according to model data of the 3D model through an operation interface provided by the display. Therefore, in this embodiment, the control device may determine the print mode according to the received user instruction, so that calculation for determining the print mode is not required, the amount of calculation required by the control device is reduced, the control of the user on the 3D printing device is enhanced, and the use experience of the user is improved.

Alternatively, the control device may match the model data with preset model data stored in the database, so as to obtain a print mode of the 3D model corresponding to the model data. For example, fig. 4 is a schematic diagram of a correspondence relationship between model data and a print mode provided in the present application. As shown in fig. 4, the database of the control device may store preset model data of N preset models in advance, where the N preset models are different in shape, size, and the like. And the database can also store the printing mode corresponding to each preset model as one of the first printing mode or the second printing mode. The control device matches the model data of the 3D model to be printed with the preset model data of the N preset models, determines preset model data identical or basically identical to the model data of the 3D model to be printed, and further determines a printing mode corresponding to the preset model data of the preset model as the printing mode of the 3D model to be printed. Therefore, in this embodiment, the control device may determine the printing mode according to the model data, so that the degree of intellectualization is higher, and the user does not need to select the printing mode, so that the degree of intellectualization of the 3D printing device is further improved, the printing efficiency of the 3D printing device is improved, and the use experience of the user is also improved.

In another embodiment, when the first printing mode and the second printing mode are executed by the 3D printing device during different layer printing processes in the same print job, the control device first performs slicing processing on the 3D model to obtain at least one sliced layer. Subsequently, the control device determines a print mode of each slice layer of the at least one slice layer based on the layer model data of the at least one slice layer. In the embodiment, the printing mode is determined layer by layer for at least one slice layer of the 3D model, and the printing control is performed based on the printing mode corresponding to each slice layer, so that the granularity of the 3D printing equipment in the printing control can be improved, the intelligent degree and the refinement degree of the control device in the control are improved, the printing quality of the 3D model printed by the 3D printing equipment is further improved, and the occurrence of abnormities such as warping deformation and the like in the printing process of the 3D model is effectively prevented.

For example, the control device may match the layer model data of the slice layers with preset layer model data stored in the database, thereby obtaining a print mode corresponding to the layer model data of each of the at least one slice layer. For example, fig. 5 is a schematic diagram of a correspondence relationship between layer model data and a print mode provided in the present application. As shown in fig. 5, the database of the control device may store preset layer model data of M preset layer models in advance, where the M preset layer models are different in shape, size, and the like. And the database can also store that the printing mode corresponding to each preset layer model data is one of the first printing mode or the second printing mode. The control device sequentially matches the layer model data of each slice layer in the model data with the M preset layer model data respectively, determines the preset layer model data which is the same or basically the same as the layer model data of each slice layer, and further determines the printing mode of each slice layer.

Alternatively, the control means may determine the image profile of each of the at least one slice layer based on layer model data of each of the at least one slice layer. Specifically, the control device may analyze and determine an image contour of the current slice layer based on the layer image data of the slice layer. For example, the image contour of the current slice layer is determined by analyzing the layer image data of the current slice layer to determine the boundaries of voxels in the current slice layer where inkjet printing is performed and voxels where inkjet printing is not performed. And then, the control device matches the image contour of each slice layer with the contour of the preset model layer stored in the database to obtain the printing mode of at least one slice layer. For example, fig. 6 is a schematic diagram of a correspondence between a model layer profile and a print mode provided in the present application. As shown in fig. 6, the database of the control device may store Q preset model layer profiles in advance, where the Q preset model layer profiles are different in shape, size, and the like. And the database can also store that the printing mode corresponding to each preset model layer contour is one of the first printing mode or the second printing mode. The control device sequentially matches the image contour of each slice layer in the model data with Q preset model layer contours respectively, determines the preset model layer contours which are the same as or basically the same as the image contour of each slice layer, and further determines the printing mode of each slice layer.

Alternatively, the control means may determine the area of each slice layer of the at least one slice layer based on layer model data of each slice layer of the at least one slice layer. Subsequently, the control means obtains a print mode of at least one slice layer based on the area of each slice layer. Specifically, the number of pixels for performing inkjet printing in the current slice layer is determined by analyzing layer model data of the current slice layer, and the area of the current slice layer model area is obtained by combining the printing resolution of the current slice layer. When the 3D printing device prints the slice layer, the model area is easy to warp and deform in the printing process when the area of the image contour area of the slice layer is large. For example, when the slice layer area is greater than 200mm ² In the case of a polygon of (a)The area of the model area is considered to be large. Thus, the control device can determine different print modes according to the area of each slice layer. For example, when the area of the sliced layer is greater than or equal to a preset value, determining the print mode of the sliced layer as the first print mode; when the area of the sliced layer is smaller than the preset value, the print mode of the sliced layer is determined to be a second print mode, and the like. In this embodiment, the print mode of the slice layer determined by the control device can more accurately perform print control on the print layer, so that the print quality of the 3D model printed by the 3D printing device is further improved, and anomalies such as warping deformation and the like in the 3D model printing process are effectively prevented.

Next, a specific implementation manner of the step of printing the 3D model according to the model data and the print mode in S103 of the print control method of the 3D printing apparatus provided in the embodiment of the present application will be described with reference to the accompanying drawings. For example, fig. 7 is a schematic flow chart of another embodiment of a print control method of a 3D printing device provided in the present application, where a specific implementation of S103 in the embodiment shown in fig. 2 is shown.

Specifically, as shown in fig. 7, the step of printing the 3D model by the control device according to the model data and the printing mode in the embodiment of the present application specifically includes:

s1031: layer image data of each slice layer is determined according to the model data and the print mode.

Specifically, the control device first determines layer image data of each slice layer of at least one slice layer of the 3D model from the model data and the print mode.

For example, fig. 8 is a schematic diagram of a 3D model provided in the present application. Taking a 3D model to be printed as an example, as shown in fig. 8, the length, width, and height of the cuboid are denoted as l, D, and h, respectively.

In one embodiment, when the print mode of the 3D model is determined as the first print mode, the control device may perform slice layering processing on the 3D model under the determined first print mode according to the model data of the 3D model, thereby obtaining the at least one slice layer Ln and the layer image data of each slice layer of the at least one slice layer. For example, L1 represents a first slice layer, L2 represents a second slice layer … … Ln represents an nth slice layer. In the example shown in fig. 8, assuming that a plane where the length l and the width D below the 3D model of the cuboid are located is placed on the printing platform, the control device may perform slice layering processing on the 3D model in the direction where the height h of the 3D model of the cuboid is located, to obtain a plurality of slice layers stacked in order in the direction of the height h. The layer image data of at least one slice layer Ln in the present embodiment includes layer image data of a model region and layer image data of a warm region.

In another embodiment, when the print mode of a slice layer in at least one slice layer of the 3D model is determined as the first print mode, the control device may perform data processing on the layer image data of the slice layer under the first print mode to obtain new layer image data, for example, combine the layer image of the slice layer with a layer image corresponding to the first print mode to obtain a new layer image, where the new layer image data includes layer image data of the model area and layer image data of the thermal insulation area.

For example, fig. 9 is a schematic diagram of layer image data in the first printing mode provided in the present application, and, as an example of the slice layer Ln shown in fig. 8 in fig. 9, the layer image data includes layer image data of the model area W1n and layer image data of the thermal insulation area Fn. The heat preservation area is an area of a non-model area outside the model area, and when the 3D model is printed, the heat preservation area is required to be separated from the model area where the 3D model is located.

In one embodiment, fig. 10 is a schematic diagram of another layer image data in the first printing mode provided in the present application, where the model area W1n and the thermal insulation area Fn shown in fig. 10 have a gap S therebetween, and the 3D printing apparatus does not perform the inkjet process within the gap S. The width of the gap S may be between 1 droplet in diameter and 5mm in size. In this embodiment, the gap S is reserved between the model area W1n and the insulation area Fn, so that powder materials in the insulation area can be prevented from being fused and adhered to the surface of the model area, and the surface quality of the printed 3D model can be further improved.

In another embodiment, when the print mode of the 3D model is determined to be the second print mode, the control device may perform slice layering processing on the 3D model in the determined second print mode according to the model data of the 3D model, to obtain at least one slice layer and layer image data of each slice layer in the at least one slice layer, where the layer image data includes layer image data of the model region.

In yet another embodiment, when a print mode of a slice layer of the at least one slice layer of the 3D model is determined to be the second print mode, the layer image data of the slice layer includes layer image data of the model region.

For example, fig. 11 is a schematic diagram of another layer image data in the second printing mode provided in the present application, and, as illustrated in fig. 11 by taking the slice layer Ln shown in fig. 8 as an example, the layer image data includes layer image data of the model area W1 n.

It is to be understood that, in the examples shown in fig. 9 and 11, layer image data when the slice layer is the first print mode and layer image data when the slice layer is the second print mode are shown for one slice layer, respectively. Accordingly, when the first printing mode and the second printing mode are performed by the 3D printing apparatus during different layer printing in the same print job, the control means may obtain the layer image data of each slice layer of the 3D model based on the layer image data of each slice layer and any one of the determined first printing mode and the second printing mode of each slice layer. Alternatively, when the first printing mode and the second printing mode are executed by the 3D printing apparatus in different print jobs, the control means may perform slice layering processing on the 3D model based on the model data of the 3D model and the determined first printing mode or second printing mode of the model, thereby obtaining layer image data of each slice layer of the 3D model.

Therefore, in the control method of the 3D printing apparatus provided in the present embodiment, the layer print data including the model area and the layer print data of the thermal insulation area in the layer print data in the first printing mode are determined, so that the thermal insulation of the model area by the thermal insulation area can prevent the temperature of the model area from diffusing to the non-model area, and the temperature control of the model area is realized, so as to improve the printing quality of the model area. And the layer printing data of the model area is also determined in the layer printing data in the second printing mode, so that the setting of the heat preservation area is more refined and effectively reduced on the premise of ensuring the printing quality, the materials required for printing the 3D model are fewer, the cost of the 3D printing equipment is saved, and the economical efficiency of the 3D printing equipment is improved.

In summary, the control method of the 3D printing device provided in this embodiment can implement that different 3D models adopt different printing modes for printing, or different slice layers of the same 3D model adopt different printing modes for printing, and compared with the print control method that all 3D models and all slice layers of the 3D model adopt the same printing mode, the control method in this embodiment has better flexibility, and can save materials required for printing the 3D model.

S1032: print data of the 3D model is determined from the layer image data of each slice layer.

Specifically, the control device determines print data of the 3D model from the layer image data of each of the at least one slice layer determined in S1031.

In one embodiment, when the print mode is determined to be the first print mode, the layer image data includes layer image data of the model region and layer image data of the soak region, and the print data includes layer print data of the model region and layer print data of the soak region. Referring to fig. 9, the control device may determine that the print data includes the layer print data of the model area W1n and the layer print data of the warm area Fn from the layer image data of the slice layer Ln. When the print mode is determined to be the second print mode, the layer image data includes layer image data of the model area, and the print data includes layer print data of the model area. Referring to fig. 11, the control device may determine that the print data includes layer print data of the model area W1n from the layer image data of the slice layer Ln.

It is to be understood that the print data determined by the control means in S1032 includes the layer print data of each slice layer of the 3D model, wherein the slice layer print data in the first print mode includes the layer print data of the model area W1n and the layer print data of the warm area Fn, and the slice layer print data in the second print mode includes only the layer print data of the model area W1n and does not include the layer print data of the warm area Fn.

In a further alternative embodiment, when the print mode of the sliced layer is determined to be the first print mode, the control means further determines that the print mode of the previous sliced layer is the first print mode based on the model data of the previous sliced layer and the first print mode determined by the current sliced layer, and determines that the layer image data of the previous sliced layer includes the layer image data of the model area and the layer image data of the thermal insulation area, and determines that the print data of the previous sliced layer includes the layer print data of the model area and the layer print data of the thermal insulation area. In one embodiment, the previous sliced layer refers to a sliced layer of the 3D model that is closer to the shaping platform direction than the current sliced layer when printed, where N is greater than or equal to 50, and is within N layers before the current sliced layer. Therefore, the control device in this embodiment may further determine, after determining that the printing mode of the current slice layer is the first printing mode, the printing mode of the slice layer within the previous N layers is the first printing mode, so as to further prevent heat of the model area in the current slice layer printing process from diffusing toward the forming platform direction, and further more effectively maintain temperature consistency of the model area in the current slice layer printing process.

In a further alternative embodiment, the control means further determines the print mode of a specified number of subsequent sliced layers when the print mode of the sliced layer is determined to be the second print mode. And when the print mode of at least one of the specified number of subsequent slice layers is the first print mode, determining that the print mode of the current slice layer is the first print mode. And determining layer image data of the layer image data packet model area and layer image data of the thermal insulation area of the current slice layer, wherein the print data comprises layer print data of the model area and layer print data of the thermal insulation area. In one embodiment, the post slice layer comprises a slice layer that is farther from the modeling platform direction than the current slice layer when the 3D model is printed, the current slice layer being followed by a slice layer within M layers, where m.ltoreq.50. Therefore, the control device in this embodiment may adjust the printing mode of the current slice layer according to the designated number of printing modes of the subsequent slice layer after determining that the printing mode of the current slice layer is the second printing mode, thereby preventing heat of the model area from diffusing in the direction of the current slice layer in the process of printing the subsequent slice layer, and further more effectively maintaining the temperature consistency of the model area in the process of printing the subsequent slice layer.

S1033: and sequentially printing at least one slice layer according to the printing data to obtain the 3D model.

Specifically, the control device sequentially prints at least one slice layer of the 3D model according to the print data determined in S1032, and all of the at least one slice layer is sequentially stacked to obtain the 3D model.

In one embodiment, the printing of a slice layer of the 3D model by the control device specifically comprises: the powder material layer is formed using a powder material, and the slice layer is formed by spraying a liquid material on the powder material layer according to the print data.

In connection with fig. 1, in the 3D model printing apparatus as shown in fig. 1, the control device 9 may control the powder spreading module 4 to form a powder material layer L0 using the powder material, and control the inkjet module 5 to spray the liquid material on the powder material layer L0 to form one slice layer of the 3D model. The control device 9 sequentially controls the lifting mechanism 41, the powder spreading module 4 and the ink jet module 5 to form at least one slice layer, and each slice layer is sequentially laminated to obtain the 3D model.

Specifically, the powder material is a powder-like material particle including an organic polymer powder material, and the kind of the specific organic polymer powder material is not limited, and may be at least one of Polystyrene (PS), polyvinyl chloride (PVC), polyacrylonitrile (PAN), acrylonitrile-styrene-acrylate copolymer (ASA), polyamide (PA), polyester, polyurethane (PU), modified polyamide, poly (meth) acrylate, polyvinyl fluoride, chlorinated polyolefin, polyvinyl alcohol (PVA) containing hydroxyl groups, cellulose, modified cellulose, polycarbonate, cellulose ester, cellulose ether, cellulose acetate, polymethyl methacrylate, polyvinyl fluoride, and the like.

In one embodiment, the powder material may further include an additive including at least one of a flow aid, a filler. Wherein, the flow aid is used for improving the fluidity of the powder material, and can be silicon dioxide, talcum powder and the like; the filler is used to improve the mechanical strength of the three-dimensional object, and may be, for example, graphene, carbon nanotubes, carbon fibers, glass microspheres, glass fibers, kaolin, etc., without limitation in this embodiment.

In one embodiment, the melting point or melting temperature of the organic polymer powder material may be 60 ℃ to 300 ℃, specifically 60 ℃, 70 ℃, 80 ℃, 100 ℃, 120 ℃, 150 ℃, 180 ℃, 200 ℃, 240 ℃, 280 ℃, 300 ℃, or the like, but may be other values within the above range, without limitation.

In one embodiment, the particle shape and particle size of the powder material are not particularly limited. Alternatively, the powder material may be spherical, dendritic, sheet-like, disk-like, needle-like, rod-like, or the like. The average particle diameter of the powder material is 1 μm to 400. Mu.m, for example, 1 μm, 5 μm, 10 μm, 30 μm, 50 μm, 100 μm, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm or 400 μm, and the average particle diameter of the powder material is preferably 30 μm to 200 μm. The particle gap in the powder material is approximately 5nm to 100. Mu.m, and may be, for example, 5nm, 10nm, 100nm, 250nm, 500nm, 1. Mu.m, 5. Mu.m, 10. Mu.m, 25. Mu.m, 50. Mu.m, 75. Mu.m, or 100. Mu.m, without limitation. The particle gaps of the powder material in the embodiments of the application are in the range of 5 nm-100 μm, which is beneficial for the liquid material to quickly permeate into the powder material layer through the gaps and for the remaining part to be on the surface layer.

In one embodiment, when the control device is printing the 3D model, for the sliced layer determined to be the first print mode, the layer print data of the sliced layer includes the layer print data of the model region and the layer print data of the keep warm region. When the control device prints the slice layer in the first printing mode, the control device sprays the first liquid material on the powder material layer according to the layer printing data of the model area of the slice layer, and sprays the second liquid material according to the layer printing data of the heat preservation area of the slice layer, and finally, the powder material layer forms a slice layer through the sprayed first liquid material and the sprayed second liquid material.

In particular, the first liquid material may be a photo-curable material. When the first liquid material is sprayed on the powder material layer, the first liquid material can initiate a curing reaction under light radiation so as to wrap the powder material contacted with the first liquid material to be cured and molded, and form a model area in one slice layer of the 3D model.

The photo-curing material in the embodiment of the present application refers to a material that can undergo curing reaction under irradiation of a radiation source, and the specific radiation source may be UV light, electromagnetic radiation, infrared rays, and the like. The photocurable material used in the present embodiment may specifically include a photocurable resin and/or a monomer, a photoinitiator, and may further include an auxiliary agent.

The present embodiment is not particularly limited as long as it can undergo a photo-curing reaction, and at least one of (meth) acrylate oligomers having nitrogen-containing heterocycle is preferable, and may be BMA-200, XMA-222LF, etc. manufactured by Bomar company, for example; and/or at least one selected from (meth) acrylate oligomers having an aliphatic ring, such as aliphatic urethane acrylate, aliphatic epoxy acrylate, and the like; and/or at least one selected from (meth) acrylate oligomers having an aromatic ring, such as bisphenol a (meth) epoxy acrylate, aromatic polyurethane (meth) acrylate, aromatic polyester (meth) acrylate, and the like; and/or at least one selected from (meth) acrylate oligomers having an oxygen-containing (thio) heterocyclic structure, such as oxirane diacrylate, trimethylolpropane formal acrylate, and the like; and/or at least one selected from epoxy resins having undergone a ring-opening reaction, such as polyglycidyl esters, poly- (beta-methyl glycidyl) esters, polyglycidyl ethers, poly- (beta-methyl glycidyl) ethers, and the like. And/or at least one selected from (meth) acrylate oligomers without a cyclic structure, for example, at least one selected from polyether acrylate, polyester acrylate, hyperbranched acrylate oligomer, and the like.

The present embodiment is not particularly limited as long as it can participate in the photo-curing reaction and plays a role in adjusting the parameter properties of the photo-curing material. Specifically, at least one of amide monomers with nitrogen-containing heterocycle can be selected from the group consisting of Acryloylmorpholine (ACMO), N-vinyl pyrrolidone, N-vinyl caprolactam and the like; and/or at least one selected from (meth) acrylate monomers having an aliphatic ring, such as dicyclopentadiene methacrylate (dicyclopentadiene methacrylate), dicyclopentanyl (meth) acrylate, isobornyl (meth) acrylate, 1-adamantane (meth) acrylate, cyclohexanedimethanol diacrylate, tricyclodecanedimethanol di (meth) acrylate, and the like; and/or at least one selected from (meth) acrylate monomers having an aromatic ring, such as ethoxylated bisphenol a di (meth) acrylate, propoxylated bisphenol a di (meth) acrylate, benzyl methacrylate (benzyl methacrylate), 2-phenoxyethyl methacrylate, and the like; and/or at least one selected from (meth) acrylate monomers having an oxygen-containing (thio) heterocyclic structure; and/or at least one selected from (meth) acrylate monomers having nitrogen-containing heterocycle, such as M370 manufactured by Gu Di company, EM2308 manufactured by Changxing company, PAR-68A manufactured by Shenzhen Sibirdshur company, A9300-1CL manufactured by Xinzhongcun company, and the like; and/or at least one selected from (meth) acrylate monomers having no cyclic structure, such as 3-hydroxy-2, 2-dimethylpropyl-3-hydroxy-2, 2-dimethylpropyl diacrylate, diethylene glycol diacrylate, dipropylene glycol diacrylate, and the like.

The photoinitiator used in the present embodiment may be at least one of a radical photoinitiator and a cationic photoinitiator. Specifically, the free radical photoinitiator can be at least one selected from alpha-hydroxyketone, alpha-aminoketone, acyl phosphine oxide, oxime esters, ITX (isopropyl thioxanthone), tertiary amine benzoate and active amine free radical photoinitiator; the cationic photoinitiator may be selected from onium salts with anions of weak nucleophilicity, such as haloonium salts, sulfonium salts, sulfoxonium salts, iodosyl salts, diazoides, and the like.

The auxiliary agent used in this embodiment may be at least one selected from the group consisting of a surfactant, a defoaming agent, and a polymerization inhibitor, and may further include other kinds of auxiliary agents.

The surfactant is not particularly limited in this embodiment, as long as it can reduce the surface tension of the photo-curing material and is advantageous for improving the leveling property of the material, for example, surfactants commonly used in the market at present, such as modified polysiloxane polymer surfactants BYK-333, BYK-337, BYK-371, BYK-377, BYK1798, BYK-UV3530, BYK-UV3575, etc., modified polysiloxane polymer surfactants Tego wet270, TEgo wet 500, tego Glide 450, TEGO RAD 2010, TEGO RAD 2011, etc., of the Pick company can be selected.

The defoaming agent is mainly used for inhibiting or eliminating bubbles generated in the preparation process and the printing process of the photo-curing material, and avoiding the influence of the generated bubbles on the smoothness of the photo-curing material in the printing process. The present example is not particularly limited to the defoamer, such as silicone polymer defoamers BYK-088, BYK020, etc. of BYK company, modified polysiloxane copolymer BYK-1798, etc., silicone-free defoamers BYK055, etc., non-silicone defoamers TEGO Airex 920, TEGO Airex 921, etc. of Di high company.

The polymerization inhibitor is mainly used for preventing free radicals in the photo-curing material from generating polymerization reaction, improving the storage stability of the photo-curing material and preventing the photo-curing material from generating chemical reaction and generating coagulation phenomenon. The specific choice of the polymerization inhibitor in this embodiment is not particularly limited as long as the polymerization inhibitor can improve the storage stability of the photocurable material and has no influence on the photocuring reaction occurring in the 3D printing process. Examples of the polymerization inhibitor that are commonly used include GENORAD 16, GENORAD 18, GENORAD 20, GENORAD 22, tinuvin234, tinuvin770, irganox245, cyant S100, cyant 130, and Irgasab UV 10, irgasab UV 22, etc. of Rahn AG.

The photocurable material in this embodiment may further include a colorant, which may be at least one of a dye and a pigment, preferably a pigment, particularly a self-dispersed nanoscale pigment paste, depending on the color requirements of the target three-dimensional object. The self-dispersing nano pigment color paste has chemically modified surface, so that the pigment is prevented from flocculating and settling, and the stability of the photocuring material is ensured.

In the specific implementation process of the embodiment, the self-dispersing nanoscale pigment paste used can be self-dispersing nanoscale inorganic pigment paste or self-dispersing nanoscale organic pigment paste. Wherein, the self-dispersing nano inorganic pigment color paste can be white pigment color paste, such as titanium dioxide, zinc oxide, lithopone, lead white and the like; black pigment paste such as carbon black, graphite, iron oxide black, aniline black, carbon black and the like may also be used. The self-dispersing nanoscale organic pigment paste may be a color pigment paste such as golden red (PR 21), lixolol scarlet (PR 49:1), pigment red G (PR 37), pigment red 171 (PR 171), fast yellow G (PY 1), hansha yellow R (PY 10), permanent yellow GR (PY 13), pigment yellow 129 (PY 129), pigment yellow 150 (PY 150), pigment yellow 185 (PY 185), phthalocyanine blue (PB 15), indigoferanone (PB 60), and the like.

In another embodiment, the first liquid material may also be a thermally polymerized material, and the first liquid material may also dissolve at least part of the powder material, the first liquid material being selectively sprayed on the powder material layer to form a pattern area of the 3D pattern to be printed, the first liquid material dissolving at least part of the powder material under irradiation of radiant energy and the first liquid material undergoing a polymerization reaction to solidify and form a layer of the 3D pattern to be printed.

Illustratively, the first liquid material includes a first active component, a second active component, a first adjuvant, and a second adjuvant.

The first active component may be at least one selected from monomers containing carbon-carbon double bonds, compositions containing epoxy groups and promoting ring-opening polymerization of the epoxy groups, cyclic lactones, sulfur heterocyclic compounds, carbonate compounds and cyclic amides. Specifically, the monomer containing a carbon-carbon double bond may be (meth) acrylic esters, vinyl ethers, allyl ethers, styrene, acryloylmorpholine, N-vinylpyrrolidone, etc. The epoxy group-containing and ring-opening polymerization-promoting composition may be an epoxy diluent-containing and/or hydroxyl group-containing small molecule or prepolymer, an epoxy diluent-containing and/or carboxyl group-containing small molecule or prepolymer. The cyclic lactone may be gamma-butyrolactone, delta-valerolactone, epsilon-caprolactone, etc.; such as thiirane, thietane, and the like; the carbonate compound can be dimethyl carbonate, diethyl carbonate and the like; the cyclic amide compound may be caprolactam or the like.

Illustratively, the first active component may be styrene or gamma-butyrolactone and the powder material may be polystyrene that is soluble by styrene or gamma-butyrolactone.

The first active component may also be a (meth) acrylic monomer, and the powder material may be poly (meth) acrylic acid ester dissolved by the (meth) acrylic acid ester monomer, cellulose, modified cellulose, hydroxyl group-containing polyvinyl alcohol, polyester, polyurethane, modified polyamide, or the like.

The first active component may also be acryloylmorpholine and the powder material may be polyurethane, cellulose, modified cellulose, hydroxyl-containing polyvinyl alcohol or the like which is partially soluble in acryloylmorpholine.

The first active component may also be epichlorohydrin, an epoxy diluent, and the powder material may also be a polycarbonate, modified polyamide, cellulose ester, cellulose ether, or the like that is soluble in epichlorohydrin or an epoxy diluent.

The first active component may be gamma-butyrolactone, and the powder material may also be polyacrylonitrile, cellulose acetate, polymethyl methacrylate, polyvinyl fluoride, polystyrene, etc. which are soluble by gamma-butyrolactone.

The first active component may also be epsilon-caprolactone and the powder material may also be chlorinated polyolefin, polyurethane, etc. that is soluble by epsilon-caprolactone.

The second active component is selected from at least one of monomers and/or prepolymers containing carbon-carbon double bonds, diluents and/or prepolymers containing epoxy groups, monomers and/or prepolymers promoting ring-opening polymerization of epoxy groups, polyalcohols, cyclic lactone, sulfur heterocyclic compounds and cyclic amide compounds.

Illustratively, the carbon-carbon double bond containing prepolymer may be, for example, an epoxy or (modified) acrylate prepolymer, a polyester acrylate prepolymer, a urethane acrylate prepolymer, a neat acrylate prepolymer, or the like. The epoxy group-containing prepolymer may be, for example, E-51, E-41, etc.; the polyol prepolymer may be, for example, a polyester diol, a polyether diol, a polycaprolactone diol, a polycarbonate diol, and the like. The cyclic lactone may be, for example, lactide or glycolide, and the cyclic lactone itself is a solid and has poor solubility. Compounds having a cyclic acetal structure in part, such as trioxymethylene, are solids themselves. The (meth) acrylic acid ester monomers have different dissolving power for polymers due to the structural difference, such as isobornyl acrylate, isobornyl methacrylate, lauryl acrylate, lauryl methacrylate, and cyclotrimethylol propane methylacrylate, which have poor dissolving effect for polyurethane powder and are basically insoluble.

The first auxiliary agent is used for initiating or catalyzing the active component to generate polymerization reaction, and comprises at least one of a free radical initiator, an anionic initiator, a cationic initiator and a catalyst.

The free radical initiator and the cationic initiator are selected from at least one of the free radical initiators and the cations described above.

The anionic initiator may be butyllithium, butyllithium oxide, or the like.

The catalyst may be ethylene glycol, stannous isooctanoate, stannous octoate, dibutyltin dilaurate, methyl fluorosulfonic acid, ethyl fluorosulfonic acid, methyl nitrobenzenesulfonic acid, methyl methylsulfonate, or tetraphenylporphyrin aluminide, etc.

The second auxiliary agent is at least one selected from defoamer, surfactant, polymerization inhibitor, antioxidant, plasticizer and dispersant.

The defoaming agent, the surfactant and the polymerization inhibitor are at least one selected from the defoaming agent, the surfactant and the polymerization inhibitor.

The antioxidant mainly has the effect of delaying or inhibiting the oxidation of the polymer, and can be, for example, 2, 6-di-tert-butyl-4-methylphenol, beta-tetra [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid n-octadecanol ester, 1, 3-tri (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 4- [ (4, 6-dioctylthio-1, 3, 5-triazin-2-yl) amino ] -2, 6-di-tert-butylphenol, dilauryl thiodipropionate, tri (nonylphenyl) phosphite ester, triphenyl phosphite, 2-mercaptobenzimidazole and the like.

The plasticizer mainly has the function of improving the toughness of the three-dimensional object finished product, and can be dioctyl phthalate, butyl benzyl phthalate, diisononyl phthalate, diisodecyl phthalate, diethyl adipate, dibutyl adipate, diisobutyl adipate, di (2-butoxyethyl) adipate, di (2-ethylhexyl) adipate, triethyl citrate, acetyl triethyl citrate, tributyl citrate and acetyl tributyl citrate.

The dispersant mainly serves to increase and improve the dispersion stability of the colorant. For example, the specific dispersant may be any dispersant, but is not limited to, for example, BYK102, BYK108, BYK110, BYK180, BYK9133, BYK9076, BYK9131, dispers655, dispers675, dispers688, dispers750, dispers670, etc.

The specific compositions of the first liquid materials are exemplified in table 1 below.

TABLE 1

The first liquid material in this embodiment may also be a liquid material containing a radiation absorber, for example, the liquid material contains carbon black particles, and the first liquid material is selectively sprayed on the powder material layer to form a model area of the 3D model to be printed, and the first liquid material absorbs radiation energy and converts the radiation energy into heat energy under the heat radiation, so that the powder material contacted with the first liquid material is fused and molded to form the layer of the 3D model to be printed.

The first liquid material may also be another kind of liquid material in this embodiment, as long as the first liquid material is selectively applied to the mold area of the powder material layer, and the powder material of the mold area can be molded into the layer of the 3D mold to be printed under the action of the first liquid material, which is not specifically shown herein.

In one embodiment, the first liquid material and the second liquid material are different liquid materials.

In one embodiment, the second liquid material is a heat storage material. The heat storage material can form a heat preservation area more effectively, so that the heat preservation of the model area is more effective. When the second liquid material is sprayed on the layer of powder material, the second liquid material may absorb most of the radiation under optical radiation and convert it into thermal energy such that the powder material in contact with the second liquid material forms a heat retaining region within one slice of the 3D model. The temperature of the heat preservation area is slightly lower than that of the model area, for example, the temperature of the heat preservation area is 1-15 degrees lower than that of the model area, so that the heat of the model area is slowed down or prevented from diffusing to the non-model area, the consistency of the temperature of the model area is favorably adjusted, and the printing quality of the model is improved.

For example, the second liquid material may contain inorganic salts therein, which have a relatively high heat capacity but a relatively low thermal emissivity. When the second liquid material is selectively applied in the keep-warm region of the layer of powder material, the second liquid material is capable of absorbing radiation applied thereto and retaining a substantial portion of the thermal energy therein, very little thermal energy being transferred from the second liquid material to the powder material in contact with the second liquid material. Specifically, the inorganic salt is water-soluble, and may be at least one of sodium iodide, potassium iodide, sodium chloride, potassium bromide, sodium hydroxide, potassium carbonate, sodium carbonate, potassium chloride, potassium sulfate, sodium sulfate, potassium phosphate, sodium phosphate, magnesium iodide, magnesium chloride, magnesium bromide, and the like.

Referring to fig. 9, when printing the 3D model, the control device ejects the first liquid material to form the model area W1n at a position on the powder material layer corresponding to the model area W1n based on the layer print data of the model area W1n, and ejects the second liquid material to form the warm area Fn at a position on the powder material layer corresponding to the warm area Fn based on the layer print data of the warm area Fn.

Referring to fig. 10, when there is a gap S between the mold area W1n and the heat-insulating area Fn, the control device does not spray liquid material in the gap S when printing the 3D mold, thereby preventing adhesion between the mold area W1n and the heat-insulating area Fn, and further improving the surface quality of the printed 3D mold.

Alternatively, in another embodiment, the first liquid material and the second liquid material may be the same liquid material, and the amount of the second liquid material ejected per unit area is lower than the amount of the first liquid material ejected per unit area. Specifically, referring to fig. 9, the control device, when printing the 3D model, ejects the first liquid material at a position on the powder material layer corresponding to the model region W1n, and also ejects the first liquid material at a position on the powder material layer corresponding to the warm-keeping region Fn, and the amount of the first liquid material ejected in the warm-keeping region Fn per unit area is lower than the amount of the first liquid material ejected in the model region W1n to form a layer of the 3D model

In one embodiment, when the control device is printing the 3D model, for a sliced layer determined to be the second print mode, the layer print data for the sliced layer includes the layer print data for the model region. The control means ejects the first liquid material on the powder material layer according to the layer print data of the model area of the sliced layer when printing the sliced layer of the second print mode, and forms one sliced layer of the powder material layer by the ejected first liquid material.

Referring to fig. 11, when printing the 3D model, the control device ejects the first liquid material on the powder material layer at a position corresponding to the model area W1n to form the model area W1n based on the layer print data of the model area W1n.

In one embodiment, the control means also provides radiation to preheat the layer of powder material before spraying the liquid material on the layer of powder material.

In one embodiment, the control means further provides radiation to the layer of powder material after spraying the liquid material on the layer of powder material to form a solidified slice layer.

Referring to fig. 1, the control means 9 may control the energy radiation module 7 to provide radiation to the layer of powder material before and/or after spraying the liquid material on the layer of powder material, to promote a polymerization reaction of the first liquid material in the mould area and/or to promote an interaction between the first liquid material and the powder material in contact with the first liquid material, thereby promoting a shaping of the mould area.

In the foregoing embodiments, the print control method and steps of the 3D printing apparatus provided in the embodiments of the present application are described, and in order to implement the method provided in the embodiments of the present application, the execution control device may include a hardware structure and/or a software module, and implement each function in the form of a hardware structure, a software module, or a hardware structure plus a software module. Some of the functions described above are performed in a hardware configuration, a software module, or a combination of hardware and software modules, depending on the specific application of the solution and design constraints.

For example, in one embodiment, fig. 12 is a schematic structural diagram of a print control apparatus of a 3D printing device provided in the present application, where the 3D printing device A0 shown in fig. 12 includes: the control device 9, the inkjet module 5, the powder spreading module 4 and the energy radiation module 7 may be specifically configured in the embodiment shown in fig. 1, and will not be described herein.

Specifically, the control device 9 shown in fig. 12 specifically includes a data acquisition module 91, a slicing module 92, a data processing module 94, and a print mode determination module 93. The data acquisition module 91 is configured to acquire model data of a 3D model to be printed; the print mode determining module 93 is configured to determine that a print mode of the 3D model is a first print mode or a second print mode, and temperature regulation manners of the model area in the first print mode and the second print mode are different. The data processing module 94 is configured to determine layer print data of the 3D model based on the model data and the determined print mode. The powder spreading module 4 is used for forming a powder material layer by using powder materials; an inkjet module 5 selectively ejects liquid material on the powder material layer according to the layer print data to form a layer of the 3D model. In one embodiment, the print mode determining module 93 communicates with the data obtaining module 91, and the print mode determining module 93 matches the received model data with model data in a database, thereby determining that the print mode of the 3D model to be printed is the first print mode or the second print mode.

Fig. 13 is a schematic structural diagram of a printing control device of another 3D printing apparatus provided in the present application, in which, in the 3D printing apparatus A0 shown in fig. 13, unlike the control device 9 shown in fig. 12, in the control device 9 provided in the present example, the printing mode determining module 93 receives, through an operation interface, a printing mode, such as a first printing mode or a second printing mode, of a model to be printed, which is determined by a user according to model data. Taking printing of the 3D model W1 to be printed as an example, the user determines that the printing mode of the model is a first printing mode according to the model data of the 3D model W1 to be printed, the user designates the printing mode of the model W1 to be printed as the first printing mode through the operation interface, the printing mode determining module 93 receives an instruction that the printing mode of the model W1 to be printed is the first printing mode, and the slicing module 92 performs slicing layering processing on the model to be printed based on the determined first printing mode and the model data of the model W1 to be printed to obtain a plurality of slicing layers. In the embodiment, the user determines the printing mode of the model to be printed according to the model data of the model to be printed, so that the data operand of the printing system is reduced, and the autonomy of the user is improved.

Fig. 14 is a schematic structural diagram of a printing control device of another 3D printing apparatus provided in the present application, in the 3D printing apparatus A0 shown in fig. 14, unlike the control device 9 shown in fig. 12, in the control device 9 provided in this example, a slicing module 92 slices and layers a model to be printed according to model data of the model to be printed acquired by a data acquisition module 91 to obtain a plurality of slicing layers, each slicing layer includes layer image data of a model area, and a print mode determining module 93 analyzes the slicing layer to determine a print mode of the slicing layer. The method for determining the print mode of the slice layer by the specific print mode determining module 93 has been described above and will not be described in detail herein. Taking the printing of the 3D model W1 to be printed as an example, the slice layer Ln is determined to be printed in the first printing mode, and in the determined first printing mode, the data processing module 94 processes the layer image data of the model area to obtain layer print data of the slice layer Ln, where the layer image data includes layer image data of the thermal insulation area and layer image data of the model area, and the layer print data includes layer print data of the model area and layer print data of the thermal insulation area. Taking printing the 3D model W1 to be printed as an example, the slice layer Ln is determined to be printed in the second printing mode, and in the determined second printing mode, the data processing module 94 performs data processing on the layer image data of the slice layer Ln to obtain layer print data of the slice layer Ln, where the layer image data includes layer image data of the model area, and the layer print data includes layer print data of the model area.

The implementation manner and principle of the printing control device of the 3D printing apparatus provided in the embodiment of the present application may refer to the description in the printing control method of the 3D printing apparatus, and will not be repeated.

It should be noted that, it should be understood that the division of the modules of the above apparatus is merely a division of a logic function, and may be fully or partially integrated into a physical entity or may be physically separated. And these modules may all be implemented in software in the form of calls by the processing element; or can be realized in hardware; the method can also be realized in a form of calling software by a processing element, and the method can be realized in a form of hardware by a part of modules. The function of the above determination module may be implemented as a processing element that is set up separately, or may be integrated into a chip of the above apparatus, or may be stored in a memory of the above apparatus in the form of program codes, and may be called and executed by a processing element of the above apparatus. The implementation of the other modules is similar. In addition, all or part of the modules can be integrated together or can be independently implemented. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in a software form.

For example, the modules above may be one or more integrated circuits configured to implement the methods above, such as: one or more specific integrated circuits (application specific integrated circuit, ASIC), or one or more digital signal processors (digital signal processor, DSP), or one or more field programmable gate arrays (field programmable gate array, FPGA), etc. For another example, when a module above is implemented in the form of a processing element calling program code, the processing element may be a general-purpose processor, such as a central processing unit (central processing unit, CPU) or other processor that may call program code. For another example, the modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

In the above-described embodiments, the steps performed by the print control apparatus of the 3D printing device may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.

The application also provides an electronic device comprising a processor and a memory. The processor is communicatively coupled to the memory. Wherein the memory stores a computer program. When the processor executes the computer program, the processor may perform the steps of the print control method of the 3D printing apparatus as in any of the previous embodiments of the present application.

The present application also provides a computer-readable storage medium storing computer instructions that, when executed, are operable to perform the steps of a print control method of a 3D printing apparatus as in any of the previous embodiments of the present application.

The embodiment of the application also provides a chip for running the instruction, wherein the chip is used for executing the steps of the printing control method of any 3D printing equipment.

Embodiments of the present application also provide a computer program product, which includes a computer program stored in a storage medium, from which at least one processor can read the computer program, and when the at least one processor executes the computer program, the steps of a print control method of any one of the 3D printing apparatuses described in the present application can be implemented.

In an embodiment, the printing control device of the 3D printing apparatus provided in the embodiment of the present application may be: a Pulse-width modulation (PWM) controller, a central processing unit (central processing unit, CPU), other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), off-the-shelf programmable gate arrays (field-programmable gate array, FPGA) or any of other programmable logic devices, discrete gate and transistor logic devices, and the like.

Those of ordinary skill in the art will appreciate that: all or part of the steps to implement the above embodiments may be accomplished by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; the storage medium includes various media capable of storing program codes such as ROM, magnetic disk, or optical disk.

Those of ordinary skill in the art will appreciate that: for the convenience of explanation of the technical solution of the present application, in the embodiments of the present application, the functional modules are described respectively, and circuit devices in each module may overlap partially or completely, which is not intended to limit the protection scope of the present application.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A print control method of a 3D printing apparatus, comprising:

obtaining model data of a 3D model to be printed;

determining a printing mode of the 3D model according to the model data; the printing mode comprises one of a first printing mode and a second printing mode, and the 3D printing equipment is different in temperature regulation mode used in the first printing mode and the second printing mode;

and sequentially printing at least one slice layer of the 3D model according to the model data and the printing mode to obtain the 3D model.

2. The method of claim 1, wherein the print mode of the 3D model comprises a print mode of at least one sliced layer of the 3D model.

3. The method of claim 2, wherein sequentially printing at least one slice layer of the 3D model according to the model data and the printing mode, resulting in the 3D model comprises:

and printing each slice layer in the at least one slice layer in turn according to the printing mode of each slice layer in the at least one slice layer and the layer model data of each slice layer in the model data to obtain the 3D model.

4. The method of claim 1, wherein the determining the print mode of the 3D model from the model data comprises:

and receiving a printing mode of the 3D model determined by a user according to the model data through an operation interface.

5. The method of claim 1, wherein the determining the print mode of the 3D model from the model data comprises:

and matching the model data with preset model data stored in a database to obtain a printing mode of the 3D model.

6. A method according to claim 2 or 3, wherein said determining a print mode of the 3D model from the model data comprises:

Determining at least one slice layer of the 3D model;

and determining the printing mode of the at least one slice layer according to the layer model data of the at least one slice layer.

7. The method of claim 6, wherein determining the print mode of the at least one slice layer based on the layer model data of the at least one slice layer comprises:

matching layer model data of each slice layer in the at least one slice layer with preset layer model data stored in a database to obtain a printing mode of the at least one slice layer;

or determining an image contour of the at least one slice layer according to layer model data of the at least one slice layer; matching the image contour of each slice layer in the at least one slice layer with the contour of a preset model layer stored in a database to obtain a printing mode of the at least one slice layer;

or determining the area of the at least one slice layer according to the layer model data of the at least one slice layer; and obtaining the printing mode of the at least one slice layer according to the area of each slice layer in the at least one slice layer.

8. A method according to any one of claims 1-3, wherein said sequentially printing at least one slice layer of said 3D model according to said model data and said printing pattern, resulting in said 3D model, comprises:

determining layer image data for each of the at least one slice layer based on the model data and the print mode; wherein the layer image data comprises layer image data of a model area and layer image data of a heat preservation area, or the layer image data comprises layer image data of the model area;

determining print data of the 3D model according to layer image data of each of the at least one slice layer;

and sequentially printing at least one slice layer of the 3D model according to the printing data to obtain the 3D model.

9. The method of claim 8, wherein prior to determining the slice image data for each of the at least one slice layer based on the model data and the print mode, further comprising:

when the print mode is determined to be the first print mode, determining the print mode of at least one previous sliced layer to be the first print mode.

10. The method of claim 9, wherein the previous slice layer comprises a slice layer within N layers prior to the current slice layer, N being ≡ 50.

11. The method of claim 8, wherein prior to determining the slice image data for each of the at least one slice layer based on the model data and the print mode, further comprising:

when the printing mode is the second printing mode, determining the printing modes of a designated number of subsequent slice layers;

and when the printing mode of at least one later slice layer in the designated number of later slice layers is the first printing mode, determining the printing mode of the current slice layer as the first printing mode.

12. The method of claim 11, wherein the later slice layer comprises a slice layer within M layers after the current slice layer, m.ltoreq.50.

13. The method of claim 8, wherein the step of determining the position of the first electrode is performed,

when the printing mode is determined to be the first printing mode, the layer image data comprises layer image data of a model area and layer image data of a heat preservation area, and the printing data comprises layer printing data of the model area and layer printing data of the heat preservation area;

When the print mode is determined to be the second print mode, the layer image data includes layer image data of a model area, and the print data includes layer print data of the model area.

14. The method according to any one of claims 9 to 12, wherein,

15. The method according to claim 8, wherein sequentially printing at least one slice layer of the 3D model according to the print data, resulting in the 3D model, comprises:

for each of the at least one sliced layer, forming a powder material layer with a powder material and spraying a liquid material on the powder material layer according to the print data to form the sliced layer, thereby obtaining the 3D model according to the at least one sliced layer formed.

16. The method of claim 15, wherein when the print mode is determined to be a first print mode, the jetting liquid material on the layer of powder material according to the print data to form the sliced layer comprises:

spraying a first liquid material on the powder material layer according to layer printing data of a model area of the slice layer, and spraying a second liquid material according to layer printing data of a heat preservation area of the slice layer to form the slice layer;

wherein the first liquid material and the second liquid material are different liquid materials; alternatively, the first liquid material and the second liquid material are the same liquid material, and the amount of the second liquid material ejected per unit area is lower than the amount of the first liquid material ejected.

17. The method of claim 16, wherein the second liquid material is a heat storage material.

18. The method of claim 15, wherein when the print mode is determined to be a second print mode, the jetting liquid material on the layer of powder material according to the print data to form the sliced layer comprises:

The sliced layer is formed by jetting a first liquid material onto the powder material layer according to layer print data of a model area of the sliced layer.

19. The method according to any one of claims 15-18, wherein,

said pre-heating said powder material layer prior to spraying liquid material thereon further comprises providing radiation to said powder material layer;

and/or, the spraying of the liquid material on the powder material layer further comprises providing radiation to the powder material layer to form a solidified slice layer.

20. The method of claim 8, wherein the step of determining the position of the first electrode is performed,

and a gap is reserved between the model area and the heat preservation area.

21. A 3D printing device comprising control means for performing the method of any of claims 1-20.

22. Print control apparatus of a 3D printing device, for performing the method of any of claims 1-20.

23. An electronic device, comprising: at least one processor and memory; the memory stores computer instructions; the at least one processor, when executing the computer instructions stored by the memory, performs the method of any one of claims 1-20.

24. A computer readable storage medium having stored therein computer instructions which, when executed by a processor, implement the method of any of claims 1-20.

25. A computer program product comprising a computer program, characterized in that the computer program, when executed, implements the method of any of claims 1-20.