3D printing method, device, equipment, medium and product

Abstract

The invention discloses a 3D printing method, device and equipment, a medium and a product, and relates to the field of 3D printing. The printing current layer is subjected to checkerboard treatment, during specific filling, the framework part is filled, filling of the receding part is avoided, and the framework part and the receding part of the previous printing current layer and the framework part and the receding part of the next printing current layer are arranged in a staggered mode in the displacement direction of the forming platform; the stripping deformation, the stripping force and the filling curing area can be reduced through the thickness and the material of the release film, so that the stripping force is reduced, stripping force data are detected and fed back through the mechanical sensor, the movement speed and displacement are changed in real time according to the stripping force, the printing auxiliary movement time can be greatly shortened, and the printing efficiency is improved. And the printing efficiency is improved. Through the mode of reducing the stripping force, the high-speed printing ink can be suitable for printing operation of fluid media with different viscosities, the use requirement of high-speed printing is met, the printing continuity and stability are good, and the printing efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the field of 3D printing, and in particular to a 3D printing method and a printing method. Background Art

[0002] 3D printing light curing methods can be divided into top projection and bottom projection according to the position of the light source. Among them, the bottom projection method places the light source at the bottom, and the molding surface is located in the middle part of the resin tank release film and the molding platform. After a single layer is exposed and cured, it is stacked layer by layer through continuous pulling up or up and down peeling of the molding platform. During this period, in addition to the exposure time, the intermediate movement process and waiting time have the greatest impact on the printing efficiency. The movement displacement, speed and deformation of the release film of the up and down peeling method will affect the printing efficiency.

[0003] In the related art, a connecting rod mechanism can be added to the bottom resin tank for peeling, and the molding platform can be raised and lowered with a small displacement for printing, so as to separate the molding surface and the release film from the shear direction, thereby achieving the purpose of reducing the peeling force; however, since the connecting rod mechanism is added to the bottom resin tank, it will be worn after long-term movement, and the resin tank is difficult to return to its original position, which can easily lead to printing failure, affect stability, and have low efficiency. In the related art, continuous pull-up high-speed printing can be achieved through continuous printing, but continuous printing has high requirements for the filling performance of the resin, and thus the fluidity of the resin is high, and it is required to be replenished to the printing area in time; for high-performance resins with high viscosity, there are disadvantages in the continuous printing stage. Due to the high viscosity of the resin, poor fluidity, and untimely replenishment, continuous high-speed printing will also result in the defect of insufficient honeycomb filling, which affects the quality of printing and molding. Summary of the invention

[0004] In view of this, the present invention provides a 3D printing method, which can effectively reduce the peeling force to improve the movement efficiency in the printing stage, and can realize a comprehensive solution that can improve the printing efficiency for resin media with different viscosities.

[0005] In a first aspect, at least one embodiment of the present disclosure provides a 3D printing method, comprising:

[0006] By driving the molding platform to move to the molding position, the molding area between the molding surface of the molding platform and the release film constitutes the current printing layer;

[0007] Establishing a checkerboard process for the current printing layer, so that the current printing layer is configured with a skeleton portion and a gap-avoiding portion, and the skeleton portion and the gap-avoiding portion are adjacently and alternately arranged in the extension direction of the current printing layer;

[0008] The skeleton part is filled with the fluid medium in the material tank, and the filling of the void part is avoided;

[0009] Providing light projection to irradiate the current printing layer to solidify the fluid medium of the skeleton part to form a polymer layer;

[0010] Driving the molding platform to move, so that the polymer layer moves away from the release film, and the molding platform moves to the next molding position;

[0011] The molding area between the molding surface of the molding platform and the release film constitutes another current printing layer;

[0012] Similarly, a checkerboard process is established for the current printing layer, and the skeleton part is filled with the fluid medium in the material tank, and the filling of the empty part is avoided;

[0013] Then, light projection is provided to irradiate the current printing layer to solidify the fluid medium of the skeleton part to form the next polymer layer;

[0014] The printed product is formed by gradually stacking multiple polymer layers up and down;

[0015] The skeleton part and the gap-avoiding part of the current layer of the previous printing are alternately arranged with the skeleton part and the gap-avoiding part of the current layer of the next printing along the displacement direction of the forming platform.

[0016] In the 3D printing method provided by at least one embodiment of the present disclosure, the 3D printing method further includes: adding a contour envelope portion to the current printing layer, wherein the contour envelope portion surrounds and covers the outer edge of the current printing layer;

[0017] The contour envelope portion is filled with the fluid medium in the material tank, and light projection is provided to irradiate and print the current layer to solidify the fluid medium of the skeleton portion and the contour envelope portion to form a polymerized layer.

[0018] In the 3D printing method provided by at least one embodiment of the present disclosure, a mechanical sensor is arranged on the molding platform, and the mechanical sensor is suitable for detecting the peeling force between the polymer layer and the release film when the molding platform is displaced away from the release film;

[0019] The displacement speed of the forming platform is adjusted according to the peeling force, so that the forming area between the forming surface of the forming platform and the release film constitutes the current layer of subsequent printing.

[0020] In the 3D printing method provided by at least one embodiment of the present disclosure, it is determined whether the polymer layer and the release film are completely separated according to the change state of the peeling force;

[0021] When it is determined that the polymer layer and the release film are completely separated, the displacement speed of the molding platform is increased.

[0022] In the 3D printing method provided in at least one embodiment of the present disclosure, the thickness of the release film is set to 0.3-0.5 mm; and / or

[0023] The release film is configured as an ACF reinforcement plate.

[0024] In the 3D printing method provided in at least one embodiment of the present disclosure, the 3D printing method further includes:

[0025] Obtaining a 3D printing model, and determining the number of printing layers in a printing stage based on the 3D printing model;

[0026] The process parameters of the printing stage are determined according to the printing layer, and the process parameters at least include the printing height and printing area of ​​the printing layer, and the amount of fluid medium filling the printing layer.

[0027] In a second aspect, at least one embodiment of the present disclosure provides a 3D printing device, the device comprising:

[0028] A driving module drives the molding platform to move to the molding position;

[0029] A processing module, used for processing the current printing layer to establish a checkerboard, so that the current printing layer configuration has a skeleton part and a gap-avoiding part;

[0030] A filling module, used to fill the skeleton part and avoid filling the gap part;

[0031] The light projection module is used to illuminate the current printing layer to solidify the fluid medium of the skeleton part.

[0032] In a third aspect, at least one embodiment of the present disclosure provides a computer device, including:

[0033] A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the 3D printing method of the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0034] In a fourth aspect, at least one embodiment of the present disclosure provides a computer-readable storage medium having computer instructions stored thereon, wherein the computer instructions are used to enable a computer to execute the 3D printing method of the first aspect or any corresponding embodiment thereof.

[0035] In a fifth aspect, at least one embodiment of the present disclosure provides a computer program product, comprising computer instructions, wherein the computer instructions are used to enable a computer to execute the 3D printing method of the first aspect or any corresponding embodiment thereof.

[0036] The technical solution provided by the present invention has the following advantages:

[0037] 1. The 3D printing method provided by the present invention performs a checkerboard treatment on the current printing layer so that the current printing layer has a skeleton part and a gap-avoiding part. During the specific filling, the skeleton part is filled and the filling of the gap-avoiding part is avoided; for adjacent printing layers, the skeleton part and the gap-avoiding part of the previous current printing layer are staggered with the skeleton part and the gap-avoiding part of the next current printing layer along the displacement direction of the forming platform. This arrangement can reduce the contact area between the polymer layer formed after the current printing layer is solidified and the release film, so that the exposure bonding force of the polymer layer relative to the entire surface of the release film is greatly reduced, which is beneficial to reduce the peeling displacement between the release film and the polymer layer and accelerate the peeling speed; by reducing the peeling force, it can be suitable for printing operations of fluid media with different viscosities, meet the use requirements of high-speed printing, and has good printing continuity and stability, which can improve printing efficiency.

[0038] 2. The 3D printing method provided by the present invention adds a contour envelope portion to the current printing layer and fills the contour envelope portion with a fluid medium, thereby adding a contour envelope constraint to the polymer layer. On the basis of ensuring printing efficiency, the surface quality of the printed product can be guaranteed, and the influence of vertical lines formed on the polymer layer after the checkerboard processing, filling and curing of the current printing layer can be avoided.

[0039] 3. The 3D printing method provided by the present invention adds a mechanical sensor to the molding platform, and judges in real time whether the polymer layer and the release film are completely separated according to the peeling force data fed back by the mechanical sensor; based on the changing state of the peeling force, the peeling speed and displacement are actively adjusted, thereby reducing unnecessary displacement movement and waiting time of the molding platform, thereby improving printing efficiency.

[0040] 4. The 3D printing method provided by the present invention adopts a release film with a thickness of 0.3-0.5 mm. Compared with the traditional normal release film thickness of 0.1-0.2 mm, the present invention reduces the anti-deformation displacement of the release film by increasing the thickness of the release film, thereby reducing the upper peeling displacement, which is beneficial to the rapid displacement of the molding platform and alignment to the subsequent molding position, thereby improving printing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of the process of the 3D printing method provided by the present invention;

[0043] Figure 2A schematic diagram of the structure of the 3D printing mechanism provided by the present invention;

[0044] Figure 3 A schematic diagram of printing the current layer by checkerboard processing in the 3D printing method provided by the present invention;

[0045] Figure 4 A schematic diagram of another printing current layer in a checkerboard process in the 3D printing method provided by the present invention;

[0046] Figure 5 A schematic diagram of the hardware structure of a computer device provided in an embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 1-displacement module; 2-molding platform; 3-material trough; 4-release film; 5-light projection module; 6-base; 701-processor; 702-memory; 703-input device; 704-output device; 710-bus. DETAILED DESCRIPTION

[0049] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0053] At least one embodiment of the present disclosure provides a 3D printing mechanism in a bottom projection mode, such as Figure 2 and Figure 3 As shown, it includes structures such as a displacement module 1, a molding platform 2, a material tank 3, a release film 4, and a light projection module 5. The 3D printing mechanism also provides a base frame 6 as a mounting base for the structure. The release film 4 is arranged between the molding platform 2 and the material tank 3 to form a specific molding area. The fluid medium is loaded in the material tank 3, and the light projection module 5 is arranged on the side of the release film 4 away from the molding platform 2, so as to irradiate the bottom of the material tank 3. The displacement module 1 drives the molding platform 2 to gradually increase the displacement of the installation process parameters, so that the fluid medium is solidified layer by layer to form multiple polymer layers, and the multiple polymer layers are superimposed and combined to form the final printed product.

[0054] In the printing stage, the molding platform 2 is displaced and immersed in the fluid medium of the material tank 3, and then the light projection module 5 irradiates the fluid medium between the curing release film 4 and the molding platform 2 to form a solidified material on the molding platform 2 to form a polymer layer; then the molding platform 2 needs to rise to a certain height to form subsequent polymer layers in sequence. Among them, the fluid medium is set to a resin material with light curing properties, such as XX (examples of resins with different viscosities).

[0055] At least one embodiment of the present disclosure provides a 3D printing method, such as Figure 1 As shown, steps S101-S108 are included:

[0056] Step S101: driving the molding platform 2 to move to the molding position so that the molding area between the molding surface of the molding platform 2 and the release film 4 constitutes the current printing layer;

[0057] Step S102: Establishing a checkerboard process for the current printing layer, so that the current printing layer is configured with a skeleton portion and a gap-avoiding portion, and the skeleton portion and the gap-avoiding portion are adjacently and alternately arranged in the extension direction of the current printing layer;

[0058] Step S103: filling the skeleton part with the fluid medium in the material tank 3, and avoiding filling the void part;

[0059] Step S104: providing light projection to irradiate the current printing layer to solidify the fluid medium of the skeleton part to form a polymer layer;

[0060] Step S105: driving the molding platform 2 to move, so that the polymer layer moves away from the release film 4, and the molding platform 2 moves to the next molding position;

[0061] The molding area between the molding surface of the molding platform 2 and the release film 4 constitutes another current printing layer;

[0062] Step S106: Similarly, a checkerboard process is established for the current printing layer, and the skeleton part is filled with the fluid medium in the material tank 3, and the filling of the empty part is avoided;

[0063] Step S107: providing light projection to irradiate the current printing layer to solidify the fluid medium of the skeleton part to form the next polymer layer;

[0064] Step S108: forming a printed product by gradually stacking multiple polymer layers up and down;

[0065] The skeleton part and the gap-avoiding part of the current layer of the previous printing are alternately arranged with the skeleton part and the gap-avoiding part of the current layer of the next printing along the displacement direction of the forming platform 2 .

[0066] This 3D printing method performs a checkerboard process on the current printing layer so that the current printing layer has a skeleton part and a gap-avoiding part. When filling, the skeleton part is filled and the gap-avoiding part is avoided. For adjacent printing layers, the skeleton part and the gap-avoiding part of the previous printing layer are staggered with the skeleton part and the gap-avoiding part of the next printing layer along the displacement direction of the forming platform 2. Figure 3 and Figure 4 For example, Figure 3 Shown is a schematic diagram of printing the current layer by checkerboard processing in the 3D printing method;

[0067] Figure 4 The diagram shown is a schematic diagram of another current printing layer in a checkerboard manner in a 3D printing method; the two current printing layers are arranged adjacent to each other, wherein the white block is arranged as a skeleton portion and the black block is arranged as a space-avoiding portion. This arrangement can reduce the contact area between the polymer layer formed after the curing of the current printing layer and the release film 4, so that the exposure bonding force of the polymer layer relative to the entire surface of the release film 4 will be greatly reduced, thereby facilitating the reduction of the peeling displacement between the release film 4 and the polymer layer and accelerating the peeling speed; by reducing the peeling force, it can be applied to the printing of fluid media with different viscosities, meeting the use requirements of high-speed printing, and has good printing continuity and stability, which can improve printing efficiency.

[0068] For the checkerboard processing of printing the current layer, for example, in some embodiments, the internal filling surface of the molding is specifically checkered, and the checkerboard processing specifically fills the all-white pixels in the filling area with black pixels at intervals, alternating black and white, and the white pixels form a skeleton, and the black and white pixels are staggered in the corresponding areas of the upper and lower layers to reduce the contact area between the current solidified layer and the release film 4. The upper and lower layers are staggered to achieve complete filling, so that the exposure adhesion of the current layer relative to the entire layer will be greatly reduced, thereby increasing the peeling speed and reducing the peeling displacement.

[0069] The 3D printing method provided by at least one embodiment of the present disclosure further includes: adding a contour envelope portion to the current printing layer, the contour envelope portion being arranged to surround and cover the outer edge of the current printing layer; filling the contour envelope portion with a fluid medium in a material tank 3, and providing light projection to irradiate the current printing layer to solidify the fluid medium of the skeleton portion and the contour envelope portion to form a polymerized layer.

[0070] By adding a contour envelope portion to the current printing layer and filling the contour envelope portion with a fluid medium, a contour envelope constraint is added to the polymer layer. On the basis of ensuring printing efficiency, the surface quality of the printed product can be guaranteed, and the influence of vertical lines formed on the polymer layer after the checkerboard processing, filling and curing of the current printing layer can be avoided.

[0071] In the 3D printing method provided by at least one embodiment of the present disclosure, a mechanical sensor is configured on the molding platform 2, and the mechanical sensor is suitable for detecting the peeling force between the polymer layer and the release film 4 when the molding platform 2 is displaced away from the release film 4; the displacement speed of the molding platform 2 is adjusted according to the peeling force, so that the molding area between the molding surface of the molding platform 2 and the release film 4 constitutes the current layer of subsequent printing. The mechanical sensor is installed on the molding platform 2, and is suitable for reading the peeling force of the upward movement of the molding platform 2.

[0072] Furthermore, whether the polymer layer and the release film 4 are completely separated is judged according to the change state of the peeling force; when it is judged that the polymer layer and the release film 4 are completely separated, the displacement speed of the molding platform 2 is increased.

[0073] A mechanical sensor is added to the molding platform 2. Based on the peeling force data fed back by the mechanical sensor, it is used to determine in real time whether the polymer layer and the release film 4 are completely separated; based on the change in the peeling force, the peeling speed and displacement are actively adjusted, thereby reducing unnecessary displacement movement and waiting time of the molding platform 2, thereby improving printing efficiency. Compared with the traditional fixed displacement and movement speed of each layer, this setting can more intelligently and dynamically adjust the displacement of the molding platform 2 according to the peeling force data to optimize the printing process.

[0074] For example, in some embodiments, when the peeling force data is within a set range, the displacement module 1 drives the forming platform 2 to move away from the release film 4. The actual peeling force data is related to the current layer forming area, which is not specifically limited in this embodiment.

[0075] For example, in some embodiments, driving the molding platform 2 to move in a direction away from the release film 4 or in a direction close to the release film 4 may adopt a uniform acceleration motion or a variable acceleration motion.

[0076] In the 3D printing method provided by at least one embodiment of the present disclosure, the thickness of the release film 4 is set to 0.3-0.5mm. By adopting a release film 4 with a thickness of 0.3-0.5mm, compared with the thickness of the conventional normal release film 4 of 0.1-0.2mm; the present invention reduces the anti-deformation displacement of the release film 4 by increasing the thickness of the release film 4, thereby reducing the upper peeling displacement, which is conducive to the rapid displacement of the molding platform 2, and aligning it to the subsequent molding position, thereby improving the printing efficiency.

[0077] In the 3D printing method provided by at least one embodiment of the present disclosure, the release film 4 is configured as an ACF reinforcement plate; this is beneficial for reducing the peeling force.

[0078] The 3D printing method provided by at least one embodiment of the present disclosure further includes obtaining a 3D printing model, determining the number of printing layers in the printing stage based on the 3D printing model; determining the process parameters of the printing stage according to the printing layers, and the process parameters at least include the printing height and printing area of ​​the printing layer, and the amount of fluid medium filling the printing layer.

[0079] In some cases, during the 3D printing stage, the intermediate movement process and waiting time have the greatest impact on the printing efficiency. The movement displacement, speed and deformation of the release film 4 in the upper and lower peeling method will affect the molding efficiency.

[0080] The 3D printing method provided by the present invention reduces the peeling release force, reduces the peeling release displacement and deformation according to the single-layer solidification, so as to improve the auxiliary movement efficiency, has good printing and molding efficiency, and can meet the printing occasions of resins with different viscosities.

[0081] The 3D printing method provided by the present invention reduces the peeling deformation and the peeling force through the thickness and material of the release film 4, reduces the filled solidification area, and thus reduces the peeling force. In addition, the size of the peeling force is intelligently judged to change the movement speed and displacement in real time, thereby greatly reducing the printing auxiliary movement time, thereby improving the printing efficiency and being able to adapt to high-speed printing of high-viscosity resins.

[0082] At least one embodiment of the present disclosure provides a 3D printing device, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0083] At least one embodiment of the present disclosure provides a 3D printing device, comprising:

[0084] A driving module drives the molding platform 2 to move to a molding position;

[0085] A processing module, used for processing the current printing layer to establish a checkerboard, so that the current printing layer configuration has a skeleton part and a gap-avoiding part;

[0086] A filling module, used to fill the skeleton part and avoid filling the gap part;

[0087] The light projection module is used to illuminate the current printing layer to solidify the fluid medium of the skeleton part.

[0088] The further functional description of each of the above modules is the same as that of the above corresponding embodiments and will not be repeated here.

[0089] The 3D printing device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (application-specific integrated circuit) circuit, a processor 701 and a memory 702 that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0090] At least one embodiment of the present disclosure provides a computer device, such as Figure 5 As shown, it includes: one or more processors 701, memory 702; of course, the computer device also includes interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses 710 for communication, and can be installed on a common motherboard or installed in other ways as needed. The processor 701 can process instructions executed in the computer device, including instructions stored in or on the memory 702 to display the graphical information of the GUI on an external input / output device 704 (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors 701 and / or multiple buses 710 can be used together with multiple memories 702 and multiple memories 702. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor 701 system).

[0091] The processor 701 may be a central processing unit 701, a network processor 701 or a combination thereof. The processor 701 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0092] The memory 702 stores instructions executable by at least one processor 701, so that the at least one processor 701 executes the method shown in the above embodiment.

[0093] The memory 702 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 702 may include a high-speed random access memory 702, and may also include a non-transient memory 702, such as at least one disk memory 702, a flash memory device, or other non-transient solid-state memory 702. In some optional embodiments, the memory 702 may optionally include a memory 702 remotely arranged relative to the processor 701, and these remote memories 702 may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0094] The memory 702 may include a volatile memory 702, such as a random access memory 702; the memory 702 may also include a non-volatile memory 702, such as a flash memory 702, a hard disk or a solid state drive; the memory 70220 may also include a combination of the above types of memory 702.

[0095] The computer device also includes an input device 703 and an output device 704. The processor 701, the memory 702, the input device 703 and the output device 704 can be connected via a bus 710 or other means. The input device 703 can receive input digital or character information, and generate key signal input related to the user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator rod, one or more mouse buttons, a trackball, a joystick, etc. The output device 704 may include a display device, an auxiliary lighting device, a tactile feedback device, etc. The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display and a plasma display. In some optional embodiments, the display device may be a touch screen.

[0096] At least one embodiment of the present disclosure provides a computer-readable storage medium. The above method according to the embodiment of the present invention can be implemented in hardware, firmware, or implemented as a computer code that can be recorded in a storage medium, or is implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium and downloaded through a network, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor 701, or programmable or dedicated hardware. Among them, the storage medium can be a disk, an optical disk, a read-only storage memory, a random access memory, a flash memory 702, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above-mentioned types of memory 702. It can be understood that the computer, the processor 701, the microprocessor 701 controller or the programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by the computer, the processor 701 or the hardware, the method shown in the above embodiment is implemented.

[0097] A computer program product, such as a computer program instruction, provided in at least one embodiment of the present disclosure, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of computer program instructions in computer-readable media includes but is not limited to source files, executable files, installation package files, etc., and accordingly, the way in which computer program instructions are executed by a computer includes but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to the computer.

[0098] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A 3D printing method, characterized in that: include: By driving the molding platform to move to the molding position, the molding area between the molding surface of the molding platform and the release film constitutes the current printing layer; Establishing a checkerboard process for the current printing layer, so that the current printing layer is configured with a skeleton portion and a gap-avoiding portion, and the skeleton portion and the gap-avoiding portion are adjacently and alternately arranged in the extension direction of the current printing layer; The skeleton part is filled with the fluid medium in the material tank, and the filling of the void part is avoided; Providing light projection to irradiate the current printing layer to solidify the fluid medium of the skeleton part to form a polymer layer; Driving the molding platform to move, so that the polymer layer moves away from the release film, and the molding platform moves to the next molding position; The molding area between the molding surface of the molding platform and the release film constitutes another current printing layer; Similarly, a checkerboard process is established for the current printing layer, and the skeleton part is filled with the fluid medium in the material tank, and the filling of the empty part is avoided; Then, light projection is provided to irradiate the current printing layer to solidify the fluid medium of the skeleton part to form the next polymer layer; The printed product is formed by gradually stacking multiple polymer layers up and down; The skeleton part and the gap-avoiding part of the current layer of the previous printing are alternately arranged with the skeleton part and the gap-avoiding part of the current layer of the next printing along the displacement direction of the forming platform.

2. The 3D printing method according to claim 1, characterized in that: The 3D printing method further includes: adding a contour envelope portion to the current printing layer, wherein the contour envelope portion surrounds and covers the outer edge of the current printing layer; The contour envelope portion is filled with the fluid medium in the material tank, and light projection is provided to irradiate and print the current layer to solidify the fluid medium of the skeleton portion and the contour envelope portion to form a polymerized layer.

3. The 3D printing method according to claim 1, characterized in that: The molding platform is provided with a mechanical sensor, which is suitable for detecting the peeling force between the polymer layer and the release film when the molding platform is displaced away from the release film; The displacement speed of the forming platform is adjusted according to the peeling force, so that the forming area between the forming surface of the forming platform and the release film constitutes the current layer of subsequent printing.

4. The 3D printing method according to claim 3, characterized in that: Judging whether the polymer layer and the release film are completely separated according to the change state of the peeling force; When it is determined that the polymer layer and the release film are completely separated, the displacement speed of the molding platform is increased.

5. The 3D printing method according to claim 1, characterized in that: The thickness of the release film is set to 0.3-0.5 mm; and / or The release film is configured as an ACF reinforcement plate.

6. The 3D printing method according to claim 1, characterized in that: The 3D printing method further comprises: Obtaining a 3D printing model, and determining the number of printing layers in a printing stage based on the 3D printing model; The process parameters of the printing stage are determined according to the printing layer, and the process parameters at least include the printing height and printing area of ​​the printing layer, and the amount of fluid medium filling the printing layer.

7. A 3D printing device, characterized in that: The device comprises: A driving module drives the molding platform to move to the molding position; A processing module, used for processing the current printing layer to establish a checkerboard, so that the current printing layer configuration has a skeleton part and a gap-avoiding part; A filling module, used to fill the skeleton part and avoid filling the gap part; The light projection module is used to illuminate the current printing layer to solidify the fluid medium of the skeleton part.

8. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the 3D printing method according to any one of claims 1 to 6 by executing the computer instructions.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the 3D printing method according to any one of claims 1 to 6.

10. A computer program product, characterized in that The method comprises computer instructions for causing a computer to execute the 3D printing method according to any one of claims 1 to 6.

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