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

Abstract

The application discloses a 3D printing method, device, equipment, medium and product, and relates to the field of 3D printing. The current layer is processed in a chessboard manner, the skeleton part is filled during specific filling, and the filling of the hollow part is avoided. The skeleton part and the hollow part of the previous printing current layer and the skeleton part and the hollow part of the next printing current layer are staggered in the displacement direction of the forming platform. The thickness and material of the release film can be used to reduce the peeling deformation and the size of the peeling force, reduce the solidification area of the filling, thereby reducing the peeling force. The mechanical sensor detects and feeds back the peeling force data, and the movement speed and displacement are changed in real time according to the size of the peeling force, so that the auxiliary movement time of printing can be greatly reduced, and the printing efficiency is improved. The application can be applied to printing operations of different viscosity fluid media by reducing the peeling force, meets the use requirement of high-speed printing, has good printing continuity and stability, and can improve the printing efficiency.

Description

Technical Field

[0001] This invention relates to the field of 3D printing, and more specifically to a 3D printing method and a printing method. Background Technology

[0002] 3D printing photopolymerization methods can be divided into two types based on the position of the light source: top projection and bottom projection. In the bottom projection method, the light source is located at the bottom, and the forming surface is located in the middle part between the resin tank release film and the forming platform. After single-layer exposure and curing, layers are stacked by continuously pulling up or peeling down the forming platform. During this process, 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 in the peeling method will all affect the printing efficiency.

[0003] In related technologies, a linkage mechanism can be added to the bottom resin tank for peeling, and the forming platform can be moved up and down with small displacements for printing, separating the forming surface and the release film from the shearing direction, thereby reducing the peeling force. However, due to wear after prolonged movement, the resin tank is difficult to return to its original position, which can easily lead to printing failures, affecting stability and reducing efficiency. In other related technologies, continuous high-speed printing can be achieved through continuous printing, but continuous printing places high demands on the resin's filling performance, requiring high resin flowability for timely replenishment to the printing area. For high-viscosity, high-performance resins, continuous printing has disadvantages. Due to the high viscosity and poor flowability of the resin, untimely replenishment can lead to incomplete honeycomb filling even with continuous high-speed printing, affecting the quality of the printed product. Summary of the Invention

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

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

[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 layer for printing;

[0007] A checkerboard pattern is created for the current printing layer, so that the current printing layer is configured with a skeleton and a clearance section, and the skeleton and clearance sections are arranged alternately and adjacently in the extension direction of the current printing layer.

[0008] The skeleton part is filled with fluid medium in the material tank, while avoiding filling the voids;

[0009] Provide light projection to illuminate the current layer for printing, so as to solidify the fluid medium of the skeleton and form a polymer layer;

[0010] The molding platform is displaced, causing the polymer layer to move away from the release film and the molding platform to the next molding position.

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

[0012] Similarly, a checkerboard pattern is created for the current layer of printing, and the skeleton part is filled by the fluid medium in the material tank, while avoiding filling the voids.

[0013] Then, light projection is applied to print the current layer to solidify the fluid medium of the skeleton, so that it can form the next polymer layer;

[0014] The printed product is formed by stacking multiple polymer layers one on top of the other.

[0015] In this configuration, the skeleton and clearance parts of the previous printed current layer are staggered with the skeleton and clearance parts of the next printed current layer along the displacement direction of the forming platform.

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

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

[0018] In the 3D printing method provided in at least one embodiment of this disclosure, a mechanical sensor is configured on the molding platform. The mechanical sensor is adapted to detect the peeling force between the polymer layer and the release film when the molding platform is displaced away from the release film.

[0019] Adjust the displacement speed of the molding platform according to the peeling force so that the molding area between the molding surface of the molding platform and the release film constitutes the current layer for subsequent printing.

[0020] In at least one embodiment of the 3D printing method provided in this disclosure, the polymer layer and the release film are completely separated based on the change in the peeling force.

[0021] Increase the displacement speed of the molding platform when it is determined that the polymer layer and the release film have completely separated.

[0022] In at least one embodiment of the 3D printing method provided in this 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 reinforcing plate.

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

[0025] Obtain a 3D printing model and determine the number of printing layers for the printing stage based on the 3D printing model;

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

[0027] Secondly, at least one embodiment of this disclosure provides a 3D printing apparatus, the apparatus comprising:

[0028] The drive module drives the molding platform to move to the molding position;

[0029] The processing module is used to process the current layer for printing to establish a checkerboard pattern, so that the current layer for printing is configured with a skeleton and a void section;

[0030] A filling module is used to fill the skeleton section and avoid filling the void section;

[0031] The light projection module is used to illuminate the current layer being printed to solidify the fluid medium in the skeleton section.

[0032] Thirdly, at least one embodiment of this disclosure provides a computer device, including:

[0033] The system includes a memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to perform the 3D printing method described in the first aspect or any of its corresponding embodiments.

[0034] Fourthly, at least one embodiment of this disclosure provides a computer-readable storage medium storing computer instructions for causing a computer to perform the 3D printing method described in the first aspect or any corresponding embodiment.

[0035] Fifthly, at least one embodiment of this disclosure provides a computer program product, including computer instructions for causing a computer to execute the 3D printing method described in the first aspect or any corresponding embodiment.

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

[0037] 1. The 3D printing method provided by this invention, by performing checkerboard processing on the current printing layer, gives the current printing layer a skeleton part and a void part. During specific filling, the skeleton part is filled while avoiding filling the void part. For adjacent printing layers, the skeleton part and void part of the previous current printing layer are staggered with the skeleton part and void 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 cured and the release film, so that the exposure adhesion force of the polymer layer relative to the entire layer of the release film will be greatly reduced, thereby helping to reduce the peel displacement between the release film and the polymer layer and accelerate the peeling speed. By reducing the peeling force, it can be applied to printing operations of fluid media with different viscosities, meet the needs 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 to the current printing layer and fills the contour envelope with a fluid medium, thereby adding contour envelope constraints to the polymer layer. This can ensure the surface quality of the printed product while ensuring printing efficiency, and can avoid the influence of vertical lines formed on the polymer layer after the checkerboard treatment of the current printing layer has been filled and solidified.

[0039] 3. The 3D printing method provided by this invention adds a mechanical sensor to the molding platform. Based on the peeling force data fed back by the mechanical sensor, it can determine in real time whether the polymer layer and the release film are completely separated. Based on the change of peeling force, it actively adjusts the peeling speed and displacement, thereby reducing unnecessary displacement and waiting time of the molding platform and improving printing efficiency.

[0040] 4. The 3D printing method provided by the present invention uses a release film with a thickness of 0.3-0.5mm. Compared with the traditional normal release film thickness of 0.1-0.2mm, the present invention reduces the release film's deformation displacement by increasing the release film thickness, thereby reducing the upper peeling displacement, which is conducive to the rapid displacement of the forming platform, aligning it to the subsequent forming position, and improving printing efficiency. Attached Figure Description

[0041] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

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

[0043] Figure 2This is a schematic diagram of the 3D printing mechanism provided by the present invention;

[0044] Figure 3 This is a schematic diagram of the checkerboard pattern processing for printing the current layer in the 3D printing method provided by the present invention;

[0045] Figure 4 This is a schematic diagram of the checkerboard pattern processing used in the 3D printing method provided by the present invention to print another current layer;

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

[0047] Explanation of reference numerals in the attached figures:

[0048] 1-Displacement module; 2-Forming platform; 3-Material trough; 4-Release film; 5-Light projection module; 6-Base frame; 701-Processor; 702-Memory; 703-Input device; 704-Output device; 710-Bus. Detailed Implementation

[0049] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] Furthermore, 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] This disclosure provides at least one embodiment of a 3D printing mechanism in a bottom projection mode, such as... Figure 2 and Figure 3 As shown, it includes a displacement module 1, a forming 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 the mounting foundation for the structure. The release film 4 is placed between the forming platform 2 and the material tank 3 to form a specific forming area. The fluid medium is loaded into the material tank 3. The light projection module 5 is placed on the side of the release film 4 away from the forming platform 2, thereby irradiating the bottom of the material tank 3. The displacement module 1 drives the forming platform 2 to gradually rise and move upward, so that the fluid medium solidifies layer by layer into multiple polymer layers. The multiple polymer layers are stacked and combined to form the final printed product.

[0054] During the printing stage, the molding platform 2 is immersed in the fluid medium of the material tank 3. Then, the fluid medium between the curing release film 4 and the molding platform 2 is irradiated by the light projection module 5 to form a polymer layer on the molding platform 2. The molding platform 2 then needs to be raised to a certain height to form subsequent polymer layers. The fluid medium is set as a resin material with photocurable properties, such as XX (examples of resins with different viscosities).

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

[0056] Step S101: Drive 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 layer for printing;

[0057] Step S102: Establish a checkerboard pattern for the current printing layer, so that the current printing layer is configured with a skeleton part and a void part, and the skeleton part and the void part are arranged alternately and adjacently in the extension direction of the current printing layer.

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

[0059] Step S104: Provide light projection to irradiate the current layer for printing, so as to solidify the fluid medium of the skeleton and form a polymer layer;

[0060] Step S105: Drive the molding platform 2 to move away from the release film 4, and move the molding platform 2 to the next molding position;

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

[0062] Step S106: Similarly, a checkerboard pattern is created for the current layer of printing. The skeleton part is filled with fluid medium in the material tank 3, while avoiding filling the voids.

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

[0064] Step S108: The printed product is formed by gradually stacking multiple polymer layers one on top of the other;

[0065] In this configuration, the skeleton and clearance parts of the previous printed current layer are staggered with the skeleton and clearance parts of the next printed current layer along the displacement direction of the forming platform 2.

[0066] This 3D printing method uses a checkerboard pattern to create a skeleton and voids in the current printing layer. During infilling, the skeleton is filled while avoiding the voids. For adjacent printing layers, the skeleton and voids of the previous and next printing layers are staggered along the displacement direction of the forming platform 2. Figure 3 and Figure 4 For example, Figure 3 The diagram shown illustrates the checkerboard pattern used in 3D printing to print the current layer.

[0067] Figure 4 The diagram illustrates a checkerboard pattern used in a 3D printing method to process another current printing layer. The two current printing layers are arranged vertically adjacent to each other, with white blocks representing the skeleton and black blocks representing the voids. This arrangement reduces the contact area between the polymer layer formed after the current printing layer solidifies and the release film 4, significantly reducing the exposure adhesion force of the polymer layer relative to the entire release film 4 layer. This helps to reduce the peel displacement between the release film 4 and the polymer layer and accelerates the peeling speed. By reducing the peeling force, it is applicable to printing operations with fluid media of different viscosities, meeting the requirements of high-speed printing. It exhibits good printing continuity and stability, and can improve printing efficiency.

[0068] For the checkerboard pattern processing of the current layer, for example, in some embodiments, the internal filling surface of the molding is specifically processed into a checkerboard pattern. The checkerboard pattern processing specifically involves filling the all-white pixels in the filling area with black pixels interspersed, with black and white pixels forming a skeleton. Corresponding areas of the upper and lower layers are staggered with black and white pixels to reduce the contact area between the current cured layer and the release film 4. The staggered upper and lower layers achieve complete filling. In this way, 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 in at least one embodiment of this disclosure further includes: adding a contour envelope to the current printing layer, the contour envelope being disposed around and covering the outer edge of the current printing layer; filling the contour envelope with a fluid medium in the material tank 3, and providing light projection to irradiate the current printing layer to solidify the fluid medium of the skeleton and the contour envelope, so as to form a polymer layer.

[0070] By adding a contour envelope to the current printing layer and filling the contour envelope with a fluid medium, contour envelope constraints are added to the polymer layer. This ensures the surface quality of the printed product while maintaining printing efficiency, and avoids the vertical lines that form on the polymer layer after the checkerboard pattern of the current printing layer has been filled, cured, and formed.

[0071] The 3D printing method provided in at least one embodiment of this disclosure includes a forming platform 2 equipped with a force sensor. The force sensor is adapted to detect the peeling force between the polymer layer and the release film 4 when the forming platform 2 is displaced away from the release film 4. The displacement speed of the forming platform 2 is adjusted according to the peeling force, so that the forming area between the forming surface of the forming platform 2 and the release film 4 constitutes the current layer for subsequent printing. The force sensor is mounted on the forming platform 2 and is adapted to read the peeling force of the forming platform 2 moving upward.

[0072] Furthermore, the polymer layer and release film 4 are completely separated based on the change in peeling force; when it is determined that the polymer layer and release film 4 are completely separated, the displacement speed of the molding platform 2 is increased.

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

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

[0075] For example, in some embodiments, the movement of the molding platform 2 away from or towards the release film 4 can be achieved by uniform acceleration or variable acceleration.

[0076] The 3D printing method provided in at least one embodiment of this disclosure uses a release film 4 with a thickness of 0.3-0.5 mm. By using a release film 4 with a thickness of 0.3-0.5 mm, compared to the traditional normal release film 4 thickness of 0.1-0.2 mm, this invention reduces the deformation displacement of the release film 4 by increasing its thickness, thereby reducing the upper peeling displacement. This facilitates the rapid displacement of the forming platform 2, aligning it with the subsequent forming position and improving printing efficiency.

[0077] The 3D printing method provided in at least one embodiment of this disclosure uses a release film 4 configured as an ACF reinforcing plate, which helps to reduce peeling force.

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

[0079] In some cases, the intermediate motion process and waiting time have the greatest impact on printing efficiency during the 3D printing stage. The motion displacement and speed of the top and bottom peeling method, as well as the deformation of the release film 4, all affect the molding efficiency.

[0080] The 3D printing method provided by this invention reduces peel release force, peel release displacement and deformation by single-layer curing, thereby improving auxiliary motion efficiency and achieving good printing efficiency, which can meet the printing needs of resins with different viscosities.

[0081] The 3D printing method provided by this invention reduces the amount of peeling deformation and the magnitude of peeling force by adjusting the thickness and material of the release film 4, thereby reducing the solidified area of ​​the filling and thus reducing the peeling force. In addition, the method intelligently judges the magnitude of the peeling force and adjusts the movement speed and displacement in real time, which can significantly reduce the printing auxiliary movement time and improve printing efficiency. It can adapt to high-speed printing of high-viscosity resins.

[0082] This disclosure provides at least one embodiment of a 3D printing apparatus for implementing the above embodiments and preferred embodiments, which will not be repeated hereafter. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0083] At least one embodiment of the 3D printing apparatus provided in this disclosure includes:

[0084] The drive module drives the molding platform 2 to move to the molding position;

[0085] The processing module is used to process the current layer for printing to establish a checkerboard pattern, so that the current layer for printing is configured with a skeleton and a void section;

[0086] A filling module is used to fill the skeleton section and avoid filling the void section;

[0087] The light projection module is used to illuminate the current layer being printed to solidify the fluid medium in the skeleton section.

[0088] Further functional descriptions of the above modules are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0089] In this embodiment, the 3D printing device is presented in the form of functional units. Here, a unit refers to an ASIC (Application-Specific Integrated Circuit) circuit, a processor 701 and a memory 702 that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0090] This disclosure provides at least one embodiment of a computer device, such as... Figure 5 As shown, the computer device includes one or more processors 701 and memory 702. It also includes interfaces for connecting the components, including high-speed and low-speed interfaces. The components communicate with each other via different buses 710 and can be mounted on a common motherboard or otherwise installed as needed. The processor 701 can process instructions executed within the computer device, including instructions stored in or on memory 702 to display graphical information of the GUI on an external input / output device 704 (such as a display device coupled to the interface). In some alternative embodiments, multiple processors 701 and / or multiple buses 710 can be used with multiple memories 702 if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor 701 system).

[0091] Processor 701 may be a central processing unit 701, a network processor 701, or a combination thereof. Processor 701 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GPRS), or any combination thereof.

[0092] The memory 702 stores instructions executable by at least one processor 701 to cause at least one processor 701 to perform the method shown in the above embodiments.

[0093] The memory 702 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory 702 may include high-speed random access memory 702, and may also include non-transient memory 702, such as at least one disk storage device 702, a flash memory device, or other non-transient solid-state memory 702. In some alternative embodiments, the memory 702 may optionally include memory 702 remotely located relative to the processor 701, and these remote memories 702 can be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0094] The memory 702 may include volatile memory 702, such as random access memory 702; the memory 702 may also include non-volatile memory 702, such as flash memory 702, hard disk or 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, memory 702, input device 703, and output device 704 can be connected via a bus 710 or other means. The input device 703 can receive input numerical or character information and generate key signal inputs related to user settings and function control of the computer device, such as a touchscreen, keypad, mouse, trackpad, touchpad, joystick, one or more mouse buttons, trackball, joystick, etc. The output device 704 may include a display device, auxiliary lighting device, and haptic feedback device, etc. The aforementioned display device includes, but is not limited to, liquid crystal displays, light-emitting diodes, displays, and plasma displays. In some alternative embodiments, the display device may be a touchscreen.

[0096] At least one embodiment of this disclosure provides a computer-readable storage medium in which the methods described in the embodiments of the present invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and subsequently stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor 701, or programmable or dedicated hardware. The storage medium may be a magnetic disk, an optical disk, read-only memory, random access memory, flash memory 702, a hard disk, or a solid-state drive, etc.; further, the storage medium may also include combinations of the above types of memory 702. It is understood that the computer, processor 701, microprocessor 701 controller, or programmable hardware includes storage components capable of storing or receiving software or computer code. When the software or computer code is accessed and executed by the computer, processor 701, or hardware, the methods shown in the embodiments described above are implemented.

[0097] This disclosure provides at least one embodiment of a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the present invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, and installation package files. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions; the computer compiling the instructions and then executing the corresponding compiled program; the computer reading and executing the instructions; or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0098] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this 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 layer for printing; A checkerboard pattern is created for the current printing layer, so that the current printing layer is configured with a skeleton and a clearance section, and the skeleton and clearance sections are arranged alternately and adjacently in the extension direction of the current printing layer. The skeleton part is filled with fluid medium in the material tank, while avoiding filling the voids; Provide light projection to illuminate the current layer for printing, so as to solidify the fluid medium of the skeleton and form a polymer layer; The molding platform is displaced, causing the polymer layer to move away from the release film and the molding platform to the next molding position. The forming area between the forming surface of the forming platform and the release film constitutes another printed current layer; Similarly, a checkerboard pattern is created for the current layer of printing, and the skeleton part is filled by the fluid medium in the material tank, while avoiding filling the voids. Then, light projection is applied to print the current layer to solidify the fluid medium of the skeleton, so that it can form the next polymer layer; The printed product is formed by stacking multiple polymer layers one on top of the other. In this configuration, the skeleton and clearance parts of the previous printed current layer are staggered with the skeleton and clearance parts of the next printed current layer 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 to the current printing layer, wherein the contour envelope is disposed around and covers the outer edge of the current printing layer; The contour envelope is filled with fluid medium in the material tank, and light projection is provided to print the current layer to solidify the fluid medium of the skeleton and contour envelope, so as to form a polymer layer.

3. The 3D printing method according to claim 1, characterized in that, The molding platform is equipped 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. Adjust the displacement speed of the molding platform according to the peeling force so that the molding area between the molding surface of the molding platform and the release film constitutes the current layer for subsequent printing.

4. The 3D printing method according to claim 3, characterized in that, Determine whether the polymer layer and release film have completely separated based on the change in peel force. Increase the displacement speed of the molding platform when it is determined that the polymer layer and the release film have completely separated.

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 reinforcing plate.

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

7. A computer device, characterized in that, include: A memory and a processor are communicatively connected, the memory storing computer instructions, and the processor executing the computer instructions to perform the 3D printing method of any one of claims 1 to 6.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a computer to perform the 3D printing method according to any one of claims 1 to 6.

9. A computer program product, characterized in that, Includes computer instructions for causing a computer to perform the 3D printing method according to any one of claims 1 to 6.

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