3D printing apparatus and build platform thereof

Abstract

The application discloses a 3D printing device and a building platform thereof. The building platform is configured to include a building plate and a part removing plate which are relatively movable. A through hole is arranged on the building plate, and a top block which can pass through the through hole and protrude from the building plane is arranged on the part removing plate. When the part removing plate is located at a part removing position, the top block can automatically top and remove the 3D part. The building platform is configured to include an elastic component which can drive the part removing plate to open relative to the building plane by elastic restoring force to reset to an initial position. The switching of the part removing plate from the part removing position to the initial position is realized, so that the 3D printing operation is not affected. The first side of the part removing plate is hinged to the first side of the building plane, so that the part removing plate can rotate relative to the building plane with the first side as the axis. Then, the part removing plate can gradually move from the first side to the second side when the 3D part is removed, so that the stress concentration applied to the 3D part during the part removing process is avoided, and the 3D part is prevented from being warped or damaged.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and more particularly to a 3D printing device and its construction platform. Background Technology

[0002] Photopolymer 3D solid printing technology is a type of rapid prototyping technology. It typically uses liquid photosensitive resin, photosensitive polymer, and other materials as curing materials. The printed model is divided into multiple cross-sectional layers, and then the solid is built by printing layer by layer. Due to its high forming accuracy, it has a wide range of applications in molds, customized products, medical devices, prostheses, and other fields.

[0003] Photopolymer 3D printing equipment includes two main types: top-exposure 3D printing equipment and bottom-exposure 3D printing equipment. Both top-exposure and bottom-exposure 3D printing equipment include a build platform on which a cumulative curing layer is attached to form a 3D component.

[0004] After 3D printing is completed, the 3D component needs to be removed. Existing removal methods typically rely on manual operation, such as using a scraper to peel or shovel the 3D component along the build plane of the build platform. However, this method is not only inefficient, but also prone to warping or damage to the 3D component due to stress concentration, thus affecting the removal quality. Therefore, how to simultaneously ensure both removal efficiency and quality when removing the 3D component from the build plane is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the shortcomings of the above-mentioned related technologies, the purpose of this application is to provide a 3D printing device and its construction platform to solve the technical problems of low efficiency and poor quality of manual part removal in the above-mentioned related technologies.

[0006] To achieve the above and other related objectives, a first aspect of this application provides a build platform for a 3D printing device. The 3D printing device includes a Z-axis moving mechanism. The build platform has a first side and a second side disposed opposite to each other, and includes: a build plate, a mounting base fixed to the Z-axis moving mechanism, having a build plane for forming a 3D component and a mounting structure for cooperating with the mounting base; the build plane has multiple through holes; a release plate, disposed between the build plane and the mounting base, with its first side hinged to the first side of the build plate and its second side elastically connected to the second side of the build plate; the release plate has multiple top blocks for passing through the through holes and protruding from the build plane to release the 3D component; and an elastic component, disposed on the second side of the build plate, including a frame fixed to the build plate and an elastic member disposed on the frame, the elastic member being used to drive the release plate to open relative to the build plate to return to its initial position through elastic restoring force.

[0007] In some embodiments provided in the first aspect of this application, the ejector plate includes: a plate body located on the back side of the construction plane for setting the top block; a first connecting assembly located on a first side of the plate body for hinged to the first side of the construction plane; and a second connecting assembly located on a second side of the plate body for elastically connecting to the second side of the construction plane via the elastic assembly, such that the plate body can rotate around the first connecting assembly to switch between an ejector position and the initial position.

[0008] In some embodiments provided in the first aspect of this application, the first connecting component includes a support portion fixed to the back of the construction plane and a pivot shaft horizontally disposed on the support portion and connected to the plate.

[0009] In some embodiments provided in the first aspect of this application, the second connecting component includes an integrally formed first connecting portion for fixedly connecting a second side of the plate and a second connecting portion for movably connecting the elastic member.

[0010] In some embodiments provided in the first aspect of this application, the elastic element includes a fixing pin connected to the second connecting portion via a pin shaft and an elastic portion sleeved on the fixing pin; the elastic portion is limited by the second connecting portion and the frame when the plate is in the detached position to generate the elastic restoring force that pushes the plate away from the construction plane.

[0011] In some embodiments provided in the first aspect of this application, the frame is provided with a hole structure for allowing the fixing pin to pass through while simultaneously stopping the elastic part.

[0012] In some embodiments provided in the first aspect of this application, the through holes are configured as strip-shaped holes arranged in a rectangular array extending from a first side of the building plane toward a second side; the top block is set corresponding to the number and position of the through holes.

[0013] In some embodiments provided in the first aspect of this application, the width of the through hole and the spacing between two adjacent through holes are both smaller than the width occupied by the 3D component on the building plane.

[0014] In some embodiments provided in the first aspect of this application, the height of the top block near the first side of the plate gradually increases from the first side toward the second side.

[0015] In some embodiments provided in the first aspect of this application, the ejector plate is configured to include a plurality of strip plates spaced apart in the lateral direction on the first side, and the top block is spaced apart on the strip plates in the longitudinal direction.

[0016] In some embodiments provided in the first aspect of this application, the Z-axis moving mechanism includes a pair of cantilever arms fixedly disposed at a preset position, for contacting the second side of the ejector plate when the Z-axis moving mechanism drives the building plate to rise, so that the ejector plate switches to the ejector position.

[0017] A second aspect of this application provides a 3D printing apparatus, comprising: a container for holding photocurable material; a build platform as described in any embodiment of the first aspect of this application; a Z-axis moving mechanism for driving the build platform to move in the Z-axis direction to adjust the gap between the build platform and the printing reference surface; an energy radiation system for irradiating the photocurable material filling the gap to obtain a cured layer; and a control device connected to the Z-axis moving mechanism and the energy radiation system for controlling their coordinated operation to attach and accumulate the cured layer on the build plane to form a 3D component, and controlling the build platform to rise to a preset position after printing to eject the 3D component.

[0018] In summary, the 3D printing equipment and its build platform provided in this application, by configuring the build platform to include a relatively movable build plate and a release plate, and by providing through holes on the build plate and providing top blocks on the release plate that can pass through the through holes and protrude from the build plane, allows the top blocks to automatically eject the 3D component when the release plate is in the release position, ensuring efficient part removal. By configuring the build platform to include an elastic component that can drive the release plate to open relative to the build plane and return to its initial position through elastic restoring force, the switching of the release plate from the release position to the initial position is realized, thereby avoiding interference with the 3D printing operation. By hinged the first side of the release plate to the first side of the build plane, the release plate can rotate relative to the build plane with its first side as the axis, thereby allowing the release plate to gradually eject the 3D component from the first side to the second side, thus avoiding stress concentration on the 3D component during the ejection process, preventing warping or damage to the 3D component, and ensuring the quality of part removal. Attached Figure Description

[0019] The specific features involved in this application are shown in the appended claims. The features and advantages of the invention can be better understood by referring to the exemplary embodiments and accompanying drawings described in detail below. A brief description of the drawings is as follows:

[0020] Figure 1 The diagram shown is a block diagram of a 3D printing apparatus in one embodiment of this application.

[0021] Figure 2 The diagram shown is a schematic of a platform mounted on a Z-axis moving mechanism in one embodiment of this application.

[0022] Figure 3 This application is displayed. Figure 2 The illustrated embodiment presents a schematic diagram of the platform's structure.

[0023] Figures 4 to 8 These are schematic diagrams showing the construction of the plane in different embodiments of this application.

[0024] Figure 9 The diagram shown is a partially enlarged schematic of the plane constructed in one embodiment of this application.

[0025] Figure 10 The diagram shown is a schematic representation of the ejector plate in its initial position in one embodiment of this application.

[0026] Figure 11 The diagram shown is a schematic representation of the ejector plate being located at the ejector position in one embodiment of this application.

[0027] Figure 12 The diagram shown is a schematic representation of the ejector plate in one embodiment of this application.

[0028] Figure 13 The diagram shown is a partially enlarged view of the ejector plate in the ejector position in one embodiment of this application.

[0029] Figure 14 The diagram shown is a structural schematic of the strip plate in one embodiment of this application.

[0030] Figure 15 The diagram shown is a structural schematic of the elastic element in one embodiment of this application. Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand the advantages and technical effects of this application from the content disclosed in this specification. In the following description, some embodiments may be referenced to the accompanying drawings. It should be understood that other embodiments not shown in the drawings may also be used, and changes in specific structures, parts or mechanisms, components, and operations may be made without departing from the spirit and scope of this application. The following detailed description should not be considered limiting, and the scope of the embodiments of this application is limited only by the claims published in this application. The terminology used herein is for describing particular embodiments only and is not intended to limit this application.

[0032] It should be understood that although the terms first, second, or third, etc., may be used herein to describe various elements or parameters in some embodiments, these elements or parameters should not be limited by these terms. These terms are used only to distinguish one element or parameter from another, and not to define the order, priority, or importance of multiple elements. For example, a first connecting component may be referred to as a second connecting component, and similarly, a second connecting component may be referred to as a first connecting component, without departing from the scope of the various described embodiments.

[0033] Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” and “including” indicate the presence of the stated features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. For example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices. Additionally, the term “and / or,” which may be used hereinafter, describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, the character “ / ”, unless otherwise specified, generally indicates that the preceding and following related objects have an “and / or” relationship. Additionally, in the description of embodiments of this application, “multiple” refers to two or more. Furthermore, the terms “or” and “and / or” as used herein are interpreted as inclusive, or mean either one or any combination thereof. Exceptions to this definition only arise when a combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0034] It should also be understood that when an element, such as a layer, region, or substrate, is referred to as being "on" another element or extending "on" another element, the element may be directly on or directly extending onto the other element, or intermediate elements may be present. Conversely, when an element is referred to as being "directly on" another element or "directly extending onto" another element, no intermediate elements are present. It will also be understood that when an element is referred to as being "connected" or "attached" to another element, it may be directly connected or coupled to the other element, or intermediate elements may be present. Conversely, when an element is referred to as being "directly connected" or "directly coupled" to another element, no intermediate elements are present. Furthermore, the term "coupled" generally means physical, mechanical, magnetic, and / or electrical coupling or connection, and in the absence of specific contrasting language, the presence of intermediate elements between coupled or associated items is not excluded.

[0035] Relative terms such as “below,” “above,” “upper,” “lower,” “horizontal,” or “vertical” may be used herein to describe the relationship between one element, layer, or region and another element, layer, or region illustrated in the figures. It will be understood that these terms are intended to cover different device orientations other than those depicted in the figures. In this application, “vertical,” “horizontal,” and “parallel” are defined as including cases within ±10% of their standard definitions. For example, vertical typically refers to an angle of 90° relative to a reference line, but in this application, vertical refers to cases including those within 80° to 100°. Unless otherwise expressly stated, comparative quantitative terms (such as “above” and “below”) are intended to cover the concept of equality. As an example, “above” can mean not only “greater than” in a mathematical sense but also “equal to.”

[0036] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It will also be understood that terms used herein shall be interpreted as having the meaning consistent with their meaning in the context of this specification and the relevant field, and shall not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0037] In view of the technical problems mentioned in the background art, this application discloses a 3D printing device and its build platform. By configuring the build platform to include a relatively movable build plate and a release plate, and providing through holes on the build plate and top blocks that can pass through the through holes and protrude from the build plane on the release plate, the top blocks can automatically release the 3D component when the release plate is in the release position, ensuring efficient part removal. By configuring the build platform to include an elastic component that can drive the release plate to open relative to the build plane and return to its initial position through elastic restoring force, the switching of the release plate from the release position to the initial position is realized, thereby avoiding interference with the 3D printing operation. By hinged the first side of the release plate to the first side of the build plane, the release plate can rotate relative to the build plane with its first side as the axis, thereby allowing the release plate to gradually release the 3D component from the first side to the second side, thus avoiding stress concentration on the 3D component during the release process, preventing warping or damage to the 3D component, and ensuring the quality of part removal.

[0038] To clarify the definition of directions and the operational methods between different structures, the embodiments disclosed in this application define a three-dimensional space defined by the horizontal, vertical, and longitudinal directions, where the horizontal, vertical, and longitudinal directions are all straight lines and are mutually perpendicular. For example, the length extension direction of the construction platform 2 is defined as the horizontal (as shown in the figure). Figure 3 The direction of the arrow X in the diagram is used to define the width extension direction of platform 2 as longitudinal (as shown in the diagram). Figure 3The direction of the arrow Y in the diagram is defined as vertical, also known as the vertical direction, the direction of ascent or descent, or the direction of up or down (as shown in the diagram). Figure 3 (The direction of arrow Z in the image).

[0039] To clearly illustrate the positional relationships between the devices, components, structures, or mechanisms in the embodiments of this application, along the longitudinal direction of the construction platform 2, the side (or end) closer to the Z-axis moving mechanism 3 is defined as the first side (or first end), and the side (or end) farther from the Z-axis moving mechanism 3 is defined as the second side (or second end), with the two being opposite to or far from each other. Furthermore, since the first side (or first end) is closer to the hatch of the 3D printing equipment, and the second side (or second end) is farther from the hatch, in subsequent embodiments, the first side (or first end) will also be referred to as the proximal side (or proximal end), and the second side (or second end) will be referred to as the distal side (or distal end). The left side of the operator facing the first side (or first end) will be referred to as the third side (or third end), and the right side of the operator facing the first side (or first end) will be referred to as the fourth side (or fourth end).

[0040] Some embodiments disclosed in this application disclose a 3D printing device. Whether based on top-exposure or bottom-exposure, both use a build plate as a platform for 3D printed components, constructing the 3D component through layer-by-layer printing. During printing, a curing material (resin liquid is a type of photocurable material, hereinafter referred to as resin liquid) is first irradiated by an energy radiation system to form a first cured layer. This first cured layer adheres to the build plate. The build plate rises or falls a predetermined distance under the action of a Z-axis movement mechanism. For example, in a bottom-exposure 3D printing device, the movement of the build plate causes the space between the build plate, the bottom of the container, and the first cured layer to be filled again with the resin liquid to be cured. The energy radiation system then irradiates again to obtain a second cured layer attached to the first cured layer. This process is repeated, with multiple filling, irradiation, and separation operations accumulating the cured layers on the build plate to obtain the 3D component.

[0041] For ease of description and understanding, the following embodiments use a bottom-exposure 3D printing device as an example for illustration, and should not be construed as a limitation of this application.

[0042] Please see Figure 1 The image shown is a block diagram of a 3D printing device in one embodiment of this application, as follows: Figure 1 As shown, the 3D printing equipment includes a container 1, a building platform 2, a Z-axis moving mechanism 3, an energy radiation system 4, and a control device 5.

[0043] In one embodiment, the container 1 is used to hold a resin liquid. The resin liquid is any liquid resin that is easily photocurable, including, for example, a simple photocurable resin liquid, or a photocurable resin liquid mixed with powder materials, etc., where the powder materials include, but are not limited to, ceramic powder or color additive powder. The material of the container 1 includes, but is not limited to, glass, plastic, and resin. The capacity of the container 1 depends on the type of 3D printing equipment. In some applications, the container is also referred to as a resin tank.

[0044] In one embodiment, the construction platform 2 includes a construction plate for attaching an irradiated and cured pattern layer to accumulate and form a 3D component. Specifically, the construction plate typically starts from a preset printing reference surface located within the container 1, and accumulates each cured layer cured on the printing reference surface layer by layer to obtain the corresponding 3D component. The printing reference surface refers to the starting surface where the resin liquid is irradiated. It should be noted that the 3D component refers to a solid part with a specific three-dimensional shape formed by the layer-by-layer deposition and curing of resin liquid on the construction platform; examples include dental models, ornaments, or other parts.

[0045] In one embodiment, the Z-axis moving mechanism 3 is connected to the build platform 2 and is used to move in a controlled vertical direction to adjust the distance between the build plate and the printing reference surface and to fill the resin liquid to be cured. In order to accurately control the irradiation energy of each cured layer, the Z-axis moving mechanism needs to move the build platform to the point where the distance between the build platform and the printing reference surface is minimized, which is the thickness of the cured layer to be cured.

[0046] In one embodiment, the Z-axis moving mechanism 3 may be configured to include a drive unit and a Z-axis moving unit. The drive unit drives the Z-axis moving unit so that the Z-axis moving unit drives the construction platform 2 to move vertically. In one implementation, the drive unit is configured as a drive motor. Specifically, the drive unit may be controlled by control commands generated by the control device 5. In some examples, the control commands include directional commands indicating that the construction platform 2 is rising, falling, or stopping. In other examples, the control commands may also include parameters such as rotational speed, acceleration, or torque to precisely control the moving distance of the Z-axis moving unit.

[0047] In one implementation, the Z-axis moving unit is configured to include a threaded rod associated with the drive unit in the vertical direction and moving guide rails disposed on both sides of the threaded rod. Correspondingly, the construction platform 2 is provided with a slider connected to the moving guide rails and a nut structure connected to the threaded rod, so that the nut structure moves on the threaded rod under the drive of the drive unit, and at the same time moves the slider on the moving guide rails, thereby realizing the movement of the construction platform 2 on the Z-axis moving mechanism 3.

[0048] In one embodiment, an energy radiation system 4 is disposed at the bottom of container 1 and is used to irradiate the resin liquid inside container 1 to obtain a patterned curing layer. Specifically, the energy radiation system 4 irradiates the resin liquid inside container 1 with images of each layer from printing data generated based on a sliced ​​3D model of a pre-printed 3D component to obtain the 3D component. In some applications, the energy radiation system is also referred to as an optical system.

[0049] In one embodiment, the control device 5 is connected to the energy radiation system 4 and the Z-axis moving mechanism 3, and is used to control the coordinated operation of the energy radiation system 4 and the Z-axis moving mechanism 3 to attach and accumulate a curing layer on the build plane to form a 3D component, and to control the build platform 2 to rise to a preset position after printing to eject the 3D component. In one implementation, the control device 5 is an electronic device containing a processor, such as a computer device, an embedded device, or an integrated circuit with a CPU.

[0050] In one example, the control device includes a processing unit, a storage unit, and multiple interface units. Each interface unit is connected to an independently packaged device, component, or mechanism within the 3D printing equipment, such as the energy radiation system 4 and the Z-axis movement mechanism 3, and transmits data via an interface. The control device also includes at least one of the following: a prompting device, a human-computer interaction device, etc. The interface unit determines its interface type based on the connected device, component, or mechanism, including but not limited to: a universal serial interface, a video interface, an industrial control interface, and a wireless communication port. The storage unit stores the printing program, and the processing unit, connected to the storage unit, controls the various components or structures within the 3D printing equipment to coordinate the printing of the 3D components when the printing program is executed.

[0051] Please see Figure 2 and Figure 3 ,in, Figure 2 The diagram shown is a schematic representation of a platform mounted on a Z-axis moving mechanism in one embodiment of this application. Figure 3 This application is displayed. Figure 2 The illustrated embodiment presents a schematic diagram of the platform's structure. (See diagram for example.) Figure 2 and Figure 3As shown, the construction platform 2 includes a construction board 21, a demolding board 22, and an elastic component 23.

[0052] In one embodiment, such as Figure 2 As shown, the construction plate 21 is fixed to the mounting base 31 of the Z-axis moving mechanism 3. In some examples, the mounting base 31 can be connected to the Z-axis moving mechanism 3 by means of fixed connection such as screws or snaps, or by an integral molding connection. For example, in an example where the Z-axis moving mechanism 3 is configured to include a threaded rod, the mounting base 31 can be configured to include a nut seat. The nut seat cooperates with the guide grooves on both sides and the guide rails on both sides of the threaded rod so that, under the drive of the drive unit, the rotation of the threaded rod drives the nut seat to move linearly up or down along the guide rails, thereby driving the mounting base 31 to move in the vertical direction.

[0053] In one embodiment, such as Figure 2 and Figure 3 As shown, the construction plate 21 includes a mounting structure 211 for mating with the mounting base 31. Figure 2 and Figure 3 In the illustrated embodiment, the mounting structure 211 is configured to include a knob assembly, allowing the operator to install and remove the construction platform 2 relative to the mounting base 31 by rotating the knob assembly clockwise or counterclockwise. In another embodiment, the mounting structure 211 may be configured to include a handle assembly, allowing the operator to install and remove the construction platform 2 relative to the mounting base 31 by gripping and rotating the handle assembly. In some applications, the above embodiments facilitate the removal of the construction platform 2 to obtain the attached 3D components. In some examples, the mounting structure 211 and the mounting base 31 are provided with interlocking guide rail structures for guiding and limiting the construction platform 2 when it is installed on the mounting base 31. Of course, in other embodiments, the mounting structure 211 may also be configured with other arbitrary structures, such as a fixed structure that prevents the construction plate 21 from being detached from the mounting base 31; this application does not impose any limitations on this.

[0054] In one embodiment, such as Figure 2 and Figure 3As shown, the construction plate 21 also includes a construction plane 212 for forming the 3D component. The construction plane 212 refers to the substrate that supports the 3D component, that is, the plane on the construction platform 2 to which the first cured layer is attached. Further, in this embodiment, the construction plane 212 refers to the lower surface of the construction plate 21. Specifically, during 3D printing, the photocurable material is first irradiated by an energy radiation system to form a first cured layer. The first cured layer is attached to the construction plane 212 of the construction platform. The construction platform 2 moves a predetermined distance under the drive of the Z-axis moving mechanism 3. Within this predetermined distance, the photocurable material to be cured is filled. The energy radiation system irradiates again to obtain a second cured layer accumulated on the first cured layer. This process is repeated, and after multiple filling, irradiation, and separation operations, each cured layer is attached and accumulated on the construction plane to obtain the 3D component.

[0055] Please see Figures 4 to 8 The figures shown are schematic diagrams illustrating the construction of the plane in different embodiments of this application. Figures 4 to 8 As shown, the construction plane 212 has multiple through holes 2121. The through holes 2121 penetrate the construction plane 212 in the vertical direction. It should be noted that the through holes 2121 can cooperate with the top block described in the subsequent embodiments to push off the 3D component formed on the construction plane 212. Please refer to the following description for details, which will not be repeated here.

[0056] In one embodiment, such as Figure 4 and Figure 6 As shown, the through holes 2121 are configured as strip-shaped holes arranged in a rectangular array extending from a first side of the constructing plane 212 toward a second side. Specifically, each through hole 2121 extends longitudinally to form an elongated opening. In the transverse direction, the multiple through holes 2121 are parallel to each other, and there is a gap between adjacent through holes 2121. Figure 4 In the illustrated embodiment, multiple through holes 2121 are evenly distributed along the same straight line in the longitudinal direction, and there is also a gap between adjacent through holes 2121. Figure 6 In the embodiment shown, there is only one through hole 2121 extending from the first side toward the second side in the longitudinal direction.

[0057] In one embodiment, such as Figure 5 As shown, the through holes 2121 are configured as staggered strip-shaped holes extending from a first side of the building plane 212 toward a second side. Specifically, in the longitudinal direction, a plurality of through holes 2121 are evenly distributed along the same straight line and there is a gap between adjacent through holes 2121. In the transverse direction, each row of through holes 2121 is staggered with each other. In some examples, Figure 4 The relatively short through hole 2121 and Figure 6The relatively long through holes 2121 can be staggered on the construction plane 212, for example, odd-numbered columns (such as the first column, the third column, etc.) can be configured as follows. Figure 6 The relatively long through-hole 2121, and even-numbered columns (such as the second column, fourth column, etc.) are configured as follows: Figure 4 Multiple through holes 2121 that are relatively short and distributed along a straight line.

[0058] In one embodiment, such as Figure 7 and Figure 8 As shown, the through holes 2121 are configured as strip-shaped holes arranged in a rectangular array extending from the third side to the fourth side of the construction plane 212. Specifically, each through hole 2121 extends in the transverse direction to form an elongated opening. In the longitudinal direction, the multiple through holes 2121 are parallel to each other, and there is a gap between adjacent through holes 2121. Figure 7 In the illustrated embodiment, multiple through holes 2121 are evenly distributed along the same straight line in the transverse direction, and there is also a gap between adjacent through holes 2121. Figure 8 In the embodiment shown, there is only one through hole 2121 extending from the third side toward the fourth side in the lateral direction.

[0059] In another embodiment, the through holes 2121 are configured as staggered strip-shaped holes extending from the third side of the self-constructing plane 212 toward the fourth side. Specifically, in the transverse direction, a plurality of through holes 2121 are evenly distributed along the same straight line and are spaced apart from adjacent through holes 2121. In the longitudinal direction, each row of through holes 2121 is staggered from each other. In some examples, Figure 7 The relatively short through hole 2121 and Figure 8 The relatively long through holes 2121 can be staggered on the construction plane 212, for example, odd-numbered rows (such as the first row, the third row, etc.) can be configured as follows. Figure 8 The relatively long through-hole 2121, and even-numbered rows (such as the second row, fourth row, etc.) are configured as follows: Figure 7 Multiple through holes 2121 that are relatively short and distributed along a straight line.

[0060] It should be noted that the above embodiments are merely illustrative. In practical applications, parameters such as the size of each through hole 2121, the spacing between two adjacent rows or columns of through holes 2121, the total number of through holes 2121 distributed on the construction plane 212, and the arrangement of each through hole 2121 on the construction plane 212 can be adaptively adjusted according to the size and layout of the 3D component to be printed. This application does not impose any limitations on these parameters. Of course, the through holes 2121 can also be configured as square holes, circular holes, irregular holes, or any other shape of hole structure.

[0061] Please see Figure 9The image shown is a partially enlarged schematic diagram of the plane constructed in one embodiment of this application. Figure 9 As shown, the width w of the through-hole 2121 is less than the width occupied by the 3D component on the build plane. This ensures that at least a portion of the first cured layer of the 3D component is attached to the build plane 212. In this embodiment, as... Figure 9 As shown, the interval between two adjacent through holes 2121 (including row interval d1 and column interval d2) is smaller than the width occupied by the 3D component on the construction plane. This ensures that the first cured layer of the 3D component occupies both the interval of the construction plane 212 and the opening of the through hole 2121, thereby ensuring that the subsequent 3D component can be successfully ejected from the construction platform 2.

[0062] In one embodiment, such as Figure 2 As shown, the ejector plate 22 is disposed between the construction plane 212 and the mounting base 31. A first side of the ejector plate 22 is hinged to a first side of the construction plane 212, and a second side of the ejector plate 22 is elastically connected to a second side of the construction plane 212. In this embodiment, the second side of the ejector plate 22 can rotate a certain angle around the first side as an axis. Furthermore, the ejector plate 22 can rotate between an initial position and an ejection position. For details, please refer to... Figure 10 and Figure 11 ,in, Figure 10 The diagram shown is a schematic representation of the ejector plate in its initial position in one embodiment of this application. Figure 11 This is a schematic diagram showing the ejector plate in the ejection position in one embodiment of this application. The ejector plate 22 is... Figure 10 Rotate clockwise from the initial position shown. Figure 11 When the part is removed as shown, the 3D component formed on the construction plane 212 can be ejected.

[0063] Please see Figure 12 The image shown is a schematic diagram of the ejector plate in one embodiment of this application. Figure 12 As shown, the ejector plate 22 includes a plate body 221, a first connecting assembly 222, and a second connecting assembly 223. The plate body 221 is located on the back side of the construction plane 212. In the embodiments of this application, the side of the construction plane 212 used to form the 3D component is defined as the front side, and the side away from the front side is defined as the back side. Further, the first connecting assembly 222 is located on a first side of the plate body 221 and is used to hinge the plate body 221 to the first side of the construction plane 212. The second connecting assembly 223 is located on a second side of the plate body 221 and is used to elastically connect to the second side of the construction plane 212.

[0064] In one embodiment, such as Figure 12As shown, the ejector plate 22 has a plurality of top blocks 2211 as described in the previous embodiment on its plate body 221. The top blocks 2211 are used to pass through the through holes 2121 and protrude from the construction plane 212 to eject the 3D component. When the ejector plate 22 is in the initial position, the plate body 221 has a certain angle with the construction plane 212, and at this time, the top blocks 2211 are away from the construction plane 212. When the ejector plate 22 is in the ejection position, the plate body 221 and the construction plane 212 are parallel to each other and in close contact (indicating that there is no gap structurally obstructing the top blocks 2211 from passing through the through holes 2121), so that the top blocks 2211 correspond one-to-one and pass through the through holes 2121. Please refer to... Figure 13 The image shown is a partially enlarged schematic diagram of the ejector plate in the ejector position in one embodiment of this application. Figure 13 As shown, the bottom of each top block 2211 is lower than the lower surface of the building plane 212, so that the top block 2211 can form multiple evenly distributed contact points on the first cured layer of the 3D component. The top block 2211 applies a uniform downward lifting force to the 3D component through its own protrusion height relative to the building plane 212, so that the entire 3D component is subjected to uniform force during lifting, thereby reducing the risk of warping, cracking or local damage.

[0065] Furthermore, the top block 2211 is rotated with the plate 221 around the first connecting component 222 to protrude from the construction plane 212. This means that the protrusion of the top block 2211 is not integral, but rather gradually protrudes from the first side to the second side of the construction plane 212. This detachment method ensures that the peeling of the 3D component relative to the construction plane is done gradually from the edge of the 3D component, thereby effectively reducing the concentrated stress on the first cured layer of the 3D component during the detachment process and ensuring the quality of the peeling.

[0066] In one embodiment, the number and position of the top block 2211 correspond to the number and position of the through holes 2121. For example, the through holes 2121 are configured as follows: Figure 4 In the example shown of a strip-shaped hole arranged in a rectangular array extending from the first side of the self-constructing plane 212 toward the second side, the top block 2211 is configured as follows: Figure 12 The ridges shown extend from the first side of the plate 221 toward the second side in a rectangular array. The through-hole 2121 is configured as follows: Figure 5In the example shown, where the top blocks 2211 are staggered on the construction plane 212, they are correspondingly staggered on the plate 221. In the example where five through holes 2121 are provided along the same straight line on the construction plane 212, five top blocks 2211 are also provided along the corresponding straight line on the plate 221. This embodiment ensures that each top block 2211 can sequentially enter the corresponding through hole 2121 and protrude from the construction plane 212 when the ejector plate 22 is located at the ejection position, thereby guaranteeing the ejection effect. Furthermore, this method of cooperating the top blocks 2211 with the through holes 2121 can be adapted to ejecting 3D components of different sizes. In addition, when the ejector plate 22 is located at the ejection position, all 3D components attached to the construction plane 212 can be ejected simultaneously. That is, a single displacement of the ejector plate 22 can achieve one-time ejection of the 3D components, thereby improving the ejection efficiency of the 3D components.

[0067] In one embodiment, such as Figure 13 As shown, the height h of the top block 2211 near the first side of the plate 221 gradually increases from the first side toward the second side. Figure 12 and Figure 13 As shown, the top block 2211 located at the leftmost end of the plate 221 is generally trapezoidal. The first and second sides of the top block 2211 are connected by an inclined section and a planar section smoothly connected to the inclined section. It should be understood that the ejector plate 22 rotates about the first side of the constructing plane 212 as an axis to... Figure 10 The initial position shown and Figure 11 The ejection positions are switched as shown. Therefore, during the rotation of the ejection plate 22 around the first side of the building plane 212, the top block 2211 closest to the first side will first approach the through hole 2121. If the top block has a uniform height structure, it may be too close to the building plane 212 when the ejection plate 22 is in the initial position, thus causing interference during the forming process of the 3D component; while if the height of the top block is reduced overall, it will not be able to fully pass through the through hole 2121 and protrude from the building plane 212 when the ejection plate 22 rotates to the ejection position to achieve effective ejection.

[0068] Based on this, this embodiment designs the top block 2211 located on the first side of the plate as a trapezoidal structure with its height gradually increasing from the first side to the second side and transitioning from a sloped section to a flat section. This ensures that, in its initial position, the lower height of the top block 2211 near the first side, combined with the sloped section, keeps it away from the opening area of ​​the through hole 2121, thus avoiding interference with the 3D component being printed. When the ejector plate 22 rotates to the ejection position, the higher second side of the top block 2211 and its flat section can smoothly pass through the through hole 2121 and stably protrude from the construction plane 212, achieving a reliable ejection action. In some examples, the sloped section and the flat section are connected by a slightly curved surface or rounded corners to avoid damage to the 3D component during ejection.

[0069] In one embodiment, such as Figure 12 As shown, the ejector plate 22's plate body 221 is configured to include a plurality of strip plates 2210 spaced laterally on a first side of the ejector plate 22, and top blocks 2211 spaced longitudinally on the strip plates 2210. Specifically, the strip plates 2210 are laterally disposed on the support portion of the first connecting assembly 222 of the ejector plate 22; please refer to the description in subsequent embodiments for details, which will not be repeated here. Please refer to... Figure 14 The image shown is a schematic diagram of the structure of the strip plate in one embodiment of this application. Figure 14 As shown, the strip plate 2210 has a first mounting hole at its first end and a second mounting hole at its second end. The strip plate 2210 is fixedly connected to the first connecting component 222 through the first mounting hole, and simultaneously fixedly connected to the second connecting component 223 through the second mounting hole. In some examples, the top block 2211 is integrally formed on the underside of the strip plate 2210. In this embodiment, by configuring the plate body 221 to include multiple strip plates 2210, the overall weight of the plate body 221 can be reduced, thereby reducing the pushing resistance when the ejector plate 22 switches from the initial position to the ejector position, allowing the 3D component to be ejected more smoothly from the building plane 212.

[0070] In another embodiment, the plate 221 can also be configured as a one-piece plate structure. In this embodiment, the first connecting component 222 and the second connecting component 223 can be directly formed on the first and second sides of the one-piece plate structure. In some examples, the one-piece plate structure can be provided with a grid-like or honeycomb-like perforated structure, thereby reducing the overall weight of the plate 221.

[0071] In one embodiment, a buffer structure, such as a rubber pad, can be provided at the bottom end of the plate 221, away from the top block 2211. This buffer structure absorbs the contact impact of the plate 221 on the building surface 212 when the ejector plate 22 is in the ejection position, thereby effectively protecting the plate 221 and the building surface 212. Alternatively, the buffer structure can also be positioned at the top of the building surface 212, away from the through hole 2121, as long as it provides a buffering effect.

[0072] In one embodiment, such as Figure 12As shown, the first connecting component 222 includes a support portion 2221 and a rotating shaft 2222. The support portion 2221 is fixed to the back of the construction plane 212, and the rotating shaft 2222 is horizontally disposed on the support portion 2221 and connected to the plate body 221. In an embodiment where the plate body 221 is configured to include multiple strip plates 2210, the support portion 2221 is configured as a beam-like structure extending in the transverse direction. Multiple first mounting slots are spaced apart on the beam-like structure, and the first mounting slots are used to correspondingly mount the first ends of each strip plate 2210. Further, a through hole for mounting the rotating shaft 2222 is transversely provided on the beam-like structure. When the plate body 221 is mounted on the support portion 2221 through the first mounting slot, the first mounting hole at the first end of the plate body 221 corresponds to the through hole, thereby facilitating the passage of the rotating shaft 2222. In some examples, the bottom surface of the support 2221 can be fixedly connected to the back of the construction plane 212 by means of screwing, bonding or integral molding, so that when the ejector plate 22 switches between the initial position and the ejector position, the strip plate 2210 included in the plate body 221 can rotate relative to the support 2221 and around the pivot 2222.

[0073] In some other embodiments, the first connecting component 222 may also be configured as a hinge structure or a gear structure, as long as it enables the plate 221 to rotate relative to the building plane 212, so that the top block 2211 on the plate 221 can pass through or out of the through hole 2121. This application does not impose any limitations on this. It should be noted that the ejector plate 22 may also translate relative to the building plane 212 in the lifting direction. For example, when the ejector plate 22 descends relative to the building plane 212, the top block 2211 can pass through the through hole 2121 and protrude from the building plane 212; when the ejector plate 22 rises relative to the building plane 212, the top block 2211 can move away from the through hole 2121. In this example, the initial position of the ejector plate 22 is parallel to and away from the building plane 212. The above examples are merely illustrative and should not be construed as limiting this application.

[0074] In one embodiment, the second connecting component 223 is used to elastically connect to a second side of the construction plane 212 via the elastic component 23, allowing the plate 221 to rotate about the first connecting component 222 to switch between the ejection position and the initial position. For example, when the second connecting component 223 causes the plate 221 to rotate clockwise about the pivot 2222, the ejection plate 22 can be positioned at... Figure 11 The ejection position is shown. When the second connecting assembly 223 drives the plate to rotate counterclockwise around the rotating shaft 2222, the ejection plate 22 can be positioned at... Figure 10The initial position is shown. Further, the process of the ejector plate 22 switching from the ejection position to the initial position is accomplished by the elastic restoring force of the elastic element 232 included in the elastic component 23. The specific structure and function of the elastic component 23 and the elastic element 232 can be found in the descriptions of subsequent embodiments, and will not be repeated here.

[0075] In one embodiment, such as Figure 12 As shown, the second connecting assembly 223 includes an integrally formed first connecting portion 2231 and a second connecting portion 2232. The first connecting portion 2231 is used to fix the second side of the connecting plate 221, and the second connecting portion 2232 is used to movably connect the elastic member 232. In some examples, the first connecting portion 2231 may also be configured as a beam-like structure with second mounting grooves spaced laterally on it. The second mounting grooves are used to embed the second end of the strip plate 2210 of the mounting plate 221. In other examples, the first connecting portion 2231 may be configured as a plate-like or block-like base and fixed to the second side of the plate 221 by means of screws, riveting, or welding. In some examples, such as Figure 12 As shown, the second connecting portion 2232 is configured to include two lug structures integrally formed on the second side of the first connecting portion 2231, and the lug structures are provided with shaft holes for mounting the elastic member 232. In this embodiment, the contact surface of the second connecting portion 2232 is a beveled guide surface.

[0076] In one embodiment, such as Figure 10 and Figure 11 As shown, the elastic component 23 is disposed on the second side of the construction plane 212, including a frame 231 fixed to the construction plane 212 and an elastic element 232 disposed on the frame 231. The elastic element 232 is used to drive the ejector plate 22 to open relative to the construction plane 212 and return to its initial position through elastic restoring force. In this embodiment, the elastic element 232 is used to provide elastic driving force for the ejector plate 22 to switch from the ejection position to the initial position. Specifically, when the ejector plate 22 switches from the initial position to the ejection position, the elastic element 232 is forced to deform to generate the elastic restoring force; after the 3D component is ejected, the elastic restoring force of the elastic element 232 will drive the ejector plate 22 to rotate in the opposite direction, causing the ejector plate 22 to automatically open and return to its initial position. Figure 10 The initial position is shown.

[0077] In one embodiment, the frame 231 may be integrally stamped or assembled from multiple components, and can be fixedly connected to the back of the construction plane 212, for example by screwing, riveting, or welding, thereby providing a stable mounting base for the elastic element 232. In some examples, the frame 231 may be made of metal. See also Figure 15The diagram shows a structural schematic of the elastic element in one embodiment of this application. Figure 15 As shown, the frame 231 has a hole structure 2311 for inserting the elastic member 232. In some examples, the hole structure 2311 is configured as an elongated strip extending from a first side of the frame 231 toward a second side to accommodate the longitudinal displacement of the elastic member 232 relative to the frame 231 when it rotates with the second connecting portion 2232.

[0078] In one embodiment, such as Figure 15 As shown, the elastic element 232 includes a fixing pin 2321 and a spring portion 2322. The fixing pin 2321 is connected to the second connecting portion 2232 via a pin shaft 233, and the spring portion 2322 is sleeved on the fixing pin 2321. In this embodiment, the fixing pin 2321 and the spring portion 2322 can pivot or slightly oscillate around the pin shaft 233 at the second connecting portion 2232, allowing the elastic element 232 to automatically adjust its angle with the rotation of the second connecting portion 2232, thereby conforming to the trajectory changes of the ejector plate 22 during rotation. In some examples, the spring portion 2322 can be configured as a helical tension spring, a helical compression spring, or other elastic elements. In this embodiment, the hole structure 2311 is used to allow the fixing pin 2321 to pass through while simultaneously stopping the spring portion 2322. At this time, the elongated hole structure 2311 allows the fixing pin 2321 to move freely within the hole in the longitudinal direction without interference. Meanwhile, in the lateral direction, the edge of the hole structure 2311 has a limiting effect on the elastic part 2322. In other words, although the fixing pin 2321 can pass through the hole structure 2311, the outer diameter of the elastic part 2322 is larger than the width of the hole structure 2311, and is thus stopped by the edge of the hole structure 2311.

[0079] In one embodiment, the elastic portion 2322 is limited by the second connecting portion 2232 and the frame 231 when the plate 221 is in the ejection position, thereby generating the elastic restoring force that pushes the plate 221 away from the construction plane 212. Specifically, when the ejection plate 22 rotates to... Figure 11 When the part is removed as shown, the elastic part 2322 reaches its maximum deformation state (that is, the elastic part 2322 can no longer be compressed / stretched in this direction and enters the maximum deformation state), and is simultaneously limited by the end face of the second connecting part 2232 and the hole structure 2311 of the frame 231. At this time, the elastic potential energy stored inside the elastic part 2322 drives it to move the second connecting part 2232 in a direction away from the construction plane 212, that is, drives the removal plate 22 to rotate back to the initial position.

[0080] In one embodiment, such as Figure 2As shown, the Z-axis moving mechanism 3 includes a pair of cantilever arms 32, which are fixedly positioned at a preset location. These cantilever arms 32 are used to contact the second side of the ejector plate 22 when the Z-axis moving mechanism 3 lifts the build plate 21, thereby switching the ejector plate 22 to the ejection position. The preset location refers to a specific spatial position predetermined on the Z-axis moving mechanism 3 according to the structural layout of the 3D printing equipment and the ejection requirements. Specifically, the process of the ejector plate 22 moving from its initial position to the ejection position is triggered by the cantilever arms 32 pushing the ejector plate 22 at the preset location, while the process of the ejector plate switching from the ejection position to its initial position is triggered by the elastic restoring force of the elastic part 2322 when the cantilever arms 32 leave the ejector plate 22. In one example, the contact end between the cantilever arms 32 and the ejector plate 22 can be set to an arc shape or a buffer pad can be added to avoid impact during the ejection process, which could lead to localized wear.

[0081] Specifically, during the 3D printing process, the build platform 2 attaches multiple 3D components to the build plane 212. After printing, the Z-axis movement mechanism 3 drives the build plate 21 to gradually rise along the Z-axis and move towards the cantilever 32. When the build plate 21 rises to the preset position of the cantilever 32, the cantilever 32 contacts the second connecting assembly 223 of the ejector plate 22 and applies a thrust to rotate the ejector plate 22 around the first connecting assembly 222, thereby... Figure 10 The initial position shown has been switched to Figure 11 The indicated detachment position allows the top block 2211 on the plate 221 to pass through the through hole 2121 and protrude from the construction plane 212, thereby detaching the 3D component attached to the construction plane.

[0082] After the ejection action is completed, the construction plate 21 continues to rise or fall along a predetermined path to move away from the cantilever 32, at which point the cantilever 32 is no longer in contact with the ejection plate 22. Under the action of the elastic component 23, the ejection plate 22 is driven by the elastic restoring force provided by the elastic part 2322 to rotate in the opposite direction around the first connecting component 222, thus removing the plate 221 from... Figure 11 The part removal position shown is reset to Figure 10 The initial position shown simultaneously moves the top block 2211 away from the through hole 2121 and away from the build plane 212, avoiding interference with subsequent printed layers or newly attached 3D components. The above process can be repeated under the control of the control device 5. That is, after each cumulative curing of the printed layer, the control device 5 controls the build plate 21 to rise, triggering the ejector plate 22 to switch to the ejector position to eject the 3D component. After the ejector action is completed and the cantilever 32 is removed, the elastic restoring force automatically resets the ejector plate 22 to the initial position, preparing for the next printing cycle or ejector action, thereby realizing an automated and smooth 3D component peeling and build plate reset process.

[0083] In summary, the 3D printing equipment and its build platform disclosed in this application, by configuring the build platform to include a relatively movable build plate and a release plate, and by providing through holes on the build plate and providing top blocks on the release plate that can pass through the through holes and protrude from the build plane, enables the release plate to automatically eject the 3D component when it is in the ejection position, ensuring efficient part removal. By configuring the build platform to include an elastic component that can drive the release plate to open relative to the build plane and return to its initial position through elastic restoring force, the switching of the release plate from the ejection position to the initial position is realized, thereby avoiding interference with the 3D printing operation. By hinged the first side of the release plate to the first side of the build plane, the release plate can rotate relative to the build plane with its first side as the axis, thereby allowing the release plate to eject the 3D component step by step from the first side to the second side, thus avoiding stress concentration on the 3D component during the ejection process, preventing warping or damage to the 3D component, and ensuring the quality of part removal.

[0084] The above embodiments are merely illustrative of the inventive essence and beneficial effects of this application, and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the principles and scope of this application. Therefore, all equivalent modifications or alterations achieved by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A build platform for a 3D printing device, the 3D printing device including a Z-axis movement mechanism, characterized in that, The construction platform has a first side and a second side that are set opposite to each other, including: The construction plate, fixed to the mounting base of the Z-axis moving mechanism, has a construction plane for forming 3D components and a mounting structure for cooperating with the mounting base; the construction plane has multiple through holes. A release plate is disposed between the building plane and the mounting base, with its first side hinged to the first side of the building plane and its second side elastically connected to the second side of the building plane; the release plate has a plurality of top blocks for passing through the through hole and protruding out of the building plane to release the 3D component; An elastic component, disposed on the second side of the construction plane, includes a frame fixed to the construction plane and an elastic element disposed on the frame. The elastic element is used to drive the release plate to open relative to the construction plane through elastic restoring force to return to the initial position.

2. The construction platform according to claim 1, characterized in that, The ejector plate includes: A plate, located on the back of the construction plane, is used to mount the top block; A first connecting component is located on a first side of the plate and is used to hinge the plate to the first side of the construction plane. The second connecting component, located on the second side of the plate, is used to elastically connect to the second side of the construction plane via the elastic component, so that the plate can rotate around the first connecting component to switch between the detached position and the initial position.

3. The construction platform according to claim 2, characterized in that, The first connecting component includes a support portion fixed to the back of the construction plane and a pivot shaft horizontally disposed on the support portion and connected to the plate.

4. The construction platform according to claim 2, characterized in that, The second connecting assembly includes an integrally formed first connecting portion for fixing the second side of the plate and a second connecting portion for movably connecting the elastic member.

5. The construction platform according to claim 4, characterized in that, The elastic element includes a fixing pin connected to the second connecting portion via a pin shaft and an elastic portion sleeved on the fixing pin; the elastic portion is limited by the second connecting portion and the frame when the plate is in the detached position to generate the elastic restoring force that pushes the plate away from the construction plane.

6. The construction platform according to claim 5, characterized in that, The frame has a hole structure that allows the fixing pin to pass through while stopping the elastic part.

7. The construction platform according to claim 1, characterized in that, The through holes are configured as strip-shaped holes arranged in a rectangular array extending from the first side of the construction plane toward the second side; the top block is set accordingly to the number and position of the through holes.

8. The construction platform according to claim 7, characterized in that, In the lateral direction, the width of the through hole and the spacing between two adjacent through holes are both smaller than the width occupied by the 3D component on the building plane.

9. The construction platform according to claim 8, characterized in that, The height of the top block near the first side of the plate gradually increases from the first side toward the second side.

10. The construction platform according to claim 9, characterized in that, The ejector plate is configured to include multiple strip plates spaced laterally on the first side, and the top block is spaced longitudinally on the strip plates.

11. The construction platform according to claim 1, characterized in that, The Z-axis moving mechanism includes a pair of cantilever arms fixedly disposed at a preset position, which are used to contact the second side of the ejector plate when the Z-axis moving mechanism drives the construction plate to rise, so that the ejector plate switches to the ejector position.

12. A 3D printing device, characterized in that, include: Containers used to hold UV-curable materials; The construction platform as described in any one of claims 1-11; Z-axis moving mechanism is used to drive the build platform to move in the Z-axis direction to adjust the gap between the build platform and the printing reference surface; An energy radiation system is used to irradiate the photocurable material filling the gap to obtain a cured layer; A control device, connected to the Z-axis moving mechanism and the energy radiation system, is used to control the two to work together to attach an accumulated curing layer on the building plane to form a 3D component, and to control the building platform to rise to a preset position after printing to detach the 3D component.

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