Construction platform and 3D printing device using the same

Abstract

The application discloses a kind of construction platform and the 3D printing equipment applied to it, the construction platform includes: construction board has a construction surface, at least one accommodating groove is opened in the construction surface, from the first side of the construction board extends to the second side opposite to the first side;Peeling mechanism includes rotatablely connected to the first side first connecting component, the second connecting component connected in the second side, and the separation part contained in the accommodating groove and bridging the first connecting component and the second connecting component;Push mechanism is arranged in the second side, for when the construction board moves relative to it, contact and push the second connecting component drive the separation part to rotate to protrude from the construction surface with the first connecting component as fulcrum, to peel off the 3D object formed on the construction surface.

Description

Technical Field

[0001] This application relates to the technical field of 3D printing, and more particularly to a construction platform and a 3D printing device using the same. 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 the surface of the build platform to form a 3D object.

[0004] After the 3D printing equipment completes the printing process, the 3D object needs to be removed. Current methods either involve manual removal or using a scraper to move along the build surface of the build platform to remove the 3D object. Manual removal is inefficient, while using a scraper carries the risk of damaging the 3D object. 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 construction platform to overcome the technical problems of low efficiency or damage to 3D objects when taking parts from the construction platform.

[0006] To achieve the above and other related objectives, a first aspect of this application provides a construction platform comprising: a construction plate having a construction surface, wherein at least one receiving groove is formed on the construction surface extending from a first side of the construction plate to a second side opposite to the first side; a peeling mechanism including a first connecting component rotatably connected to the first side, a second connecting component connected to the second side, and a separating portion accommodated in the receiving groove and bridging the first connecting component and the second connecting component; and a pushing mechanism disposed on the second side for contacting and pushing the second connecting component to drive the separating portion to rotate about the first connecting component as a fulcrum to protrude from the construction surface, thereby peeling off a 3D object formed on the construction surface.

[0007] In some examples of the first aspect, the first connecting assembly includes: a shaft assembly including a support portion fixed to the back of the building plate and a rotating shaft transversely disposed on the support portion; a rotating member including a rotating portion sleeved on the rotating shaft and an extended fixed plate, wherein the first end of the separating portion located on the first side is fixed to the fixed plate.

[0008] In some examples of the first aspect, the second connecting component includes: a connecting portion fixedly connected to a second end of the separating portion located on a second side, for rotating the separating portion under the push of the pushing mechanism; and a retaining mechanism disposed on the second side and connected to the connecting portion, for applying a force away from the building surface toward the connecting portion such that the connecting portion retains or returns the separating portion to the receiving groove when not being pushed.

[0009] In some examples of the first aspect, the retaining mechanism includes: a positioning part fixedly disposed on a second side of the building plate and having a limiting space for movement of the connecting part; an elastic component disposed on the positioning part and restricted by the positioning part or the building plate in its elastic restoring force toward the building surface, and further connected to the connecting part so that the elastic component applies a force away from the building surface to the connecting part when it elastically restors in a direction away from the building surface.

[0010] In some examples of the first aspect, the connecting portion includes an actuating portion and a fixing plate extending downward from the first plate, the actuating portion traversing the limiting space and connected to the elastic component, and the second end of the separating portion extending from the second side to be fixed to the fixing plate.

[0011] In some examples of the first aspect, the positioning portion is provided with a first through hole communicating with the limiting space; the elastic component includes: a fixing pin, the tail of which passes through the first through hole and is fixed to the connecting portion located in the limiting space; an elastic member, sleeved on the fixing pin, which is constrained between the positioning portion and the pin head of the fixing pin such that the restoring force of the elastic member toward the pin head causes the fixing pin to exert a force on the connecting portion away from the building surface.

[0012] In some examples of the first aspect, the positioning part is provided with a first through hole communicating with the limiting space, and the connecting part is provided with a second through hole corresponding to the first through hole; the elastic component includes: a fixing pin, the pin tail of which passes through the first through hole and the second through hole in sequence and is fixed at the bottom of the limiting space; an elastic member, sleeved on the fixing pin, which is restricted between the connecting part and the bottom of the limiting space such that the restoring force generated by the elastic member is a force applied toward the connecting part away from the building surface.

[0013] In some examples of the first aspect, the separation portion is housed within the receiving groove and maintains a distance of at least 1 mm from the construction surface.

[0014] In some examples of the first aspect, the receiving tanks are configured as a plurality of equally spaced tanks, and the separation section is configured corresponding to the number of the receiving tanks.

[0015] In some examples of the first aspect, the width of the receiving slot and the spacing between two adjacent receiving slots are both smaller than the width occupied by the 3D object on the construction surface.

[0016] In some examples of the first aspect, the separating portion has an arcuate surface facing the building surface.

[0017] In some examples of the first aspect, the pushing mechanism is configured in a fixed position, and when the building plate moves toward the pushing mechanism under the drive of a Z-axis moving mechanism, the second connecting component contacts and is pushed by the pushing mechanism.

[0018] In some examples of the first aspect, the pushing mechanism includes a driving mechanism and a blocking member connected to the driving mechanism, the driving mechanism being used to drive the blocking member toward the building plate so that the second connecting component contacts and is pushed by the blocking member.

[0019] 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 example of the first aspect; 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 a 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 the Z-axis moving mechanism and the energy radiation system to work together to attach an accumulated cured layer on the build surface to obtain a 3D object and to control the build platform to rise to a preset position so that the 3D object can be peeled off.

[0020] In summary, the present application provides a construction platform and a 3D printing device using the same, wherein the construction platform is configured with a pushing mechanism and a peeling mechanism including a separating part. The peeling mechanism, driven by the pushing mechanism, can cause the separating part to protrude from the construction surface, thereby peeling the 3D object from the construction surface, thus improving the efficiency and quality of 3D object peeling. Attached Figure Description

[0021] The specific features involved in this application are shown in the appended claims. A better understanding of the features and advantages of the invention can be achieved by referring to the exemplary embodiments and accompanying drawings described in detail below. A brief description of the drawings is as follows:

[0022] Figure 1 The diagram shown is a simplified structural schematic of a 3D printing device in one embodiment of this application.

[0023] Figure 2 The diagram shown is a three-dimensional structural schematic of a 3D printing device in one embodiment of this application, with some structures omitted.

[0024] Figure 3 and Figure 4 The diagrams shown are schematic diagrams of the three-dimensional structure and the split structure of the platform constructed in one embodiment of this application.

[0025] Figure 5 The diagram shown is a schematic of the construction platform in a printing state in one embodiment of this application.

[0026] Figure 6 The diagram shown is a schematic representation of the construction platform in a stripped state in one embodiment of this application.

[0027] Figure 7 This application is displayed as being in Figure 5 A cross-sectional view of the construction platform in the illustrated embodiment.

[0028] Figure 8 This application is displayed. Figure 7 A magnified view of the section shown.

[0029] Figure 9 This application is displayed. Figure 6 The image shows a magnified view of the construction platform in the stripping state.

[0030] Figure 10 The diagram shown is a schematic representation of the disassembled structure of the retaining mechanism in one embodiment of this application.

[0031] Figure 11 This application is displayed. Figure 6 The diagram shows a cross-sectional view of the construction platform in the stripping state.

[0032] Figure 12 The diagram shown is a structural schematic of the retaining mechanism in another embodiment of this application. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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 the standard definition. 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.”

[0038] 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.

[0039] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of them. Based on the embodiments in the present application, all other embodiments and technical effects obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application. The terms "an embodiment," "implementation," or similar wording used throughout this specification mean that a specific feature, structure, or characteristic described together with an embodiment is included in at least one embodiment of the present application. Therefore, the appearance of the phrases "in an embodiment," "in an embodiment," and similar wording throughout this specification may (but does not necessarily) refer to the same embodiment.

[0040] In view of the technical problems mentioned in the background art, this application provides a building platform and a 3D printing device using the same. The building platform is configured with a pushing mechanism and a peeling mechanism including a separating part. The peeling mechanism can drive the separating part to protrude from the building surface under the pushing mechanism, thereby peeling the 3D object from the building surface, improving the efficiency and quality of 3D object peeling.

[0041] In some embodiments of this application, a 3D printing device is proposed. This 3D printing device can be a bottom-surface exposure (or scanning) or top-surface exposure (or scanning) printing device; that is, the energy radiation system of the 3D printing device projects or scans energy onto a container located below or above it. Further, the 3D printing device can be, for example, a device employing DLP printing technology, SLA printing technology, or LCD printing technology. Of course, the above are merely examples, and the 3D printing device can also be, for example, any type of 3D printing device including an energy radiation system, a component platform, and a container for holding photocurable material. In the following... Figures 1 to 12 In the embodiments shown, the 3D printing equipment will be described using a 3D printer based on LCD printing technology as an example.

[0042] Please see Figure 1 and Figure 2 , Figure 1 The diagram shown is a simplified structural schematic of a 3D printing device according to one embodiment of this application. Figure 2 The diagram shown is a three-dimensional structural schematic of a 3D printing device in one embodiment of this application, with some structures omitted. Figure 1 and Figure 2As shown, the 3D printing equipment includes a container 1, a build platform 2, a Z-axis moving mechanism 3, an energy radiation system 4, and a control device 5. The container 1 holds photocurable material. The Z-axis moving mechanism 3 drives the build platform 2 to move along the Z-axis to adjust the gap between the build platform 2 and the printing reference surface. The energy radiation system 4 irradiates the photocurable material filling the gap to obtain a cured layer. The control device 5 is connected to the Z-axis moving mechanism 3 and the energy radiation system 4, and controls the Z-axis moving mechanism and the energy radiation system to work together to attach an accumulated cured layer on the build surface to obtain a 3D object.

[0043] The construction surface refers to the substrate that supports the cured layer, that is, the surface on the construction platform 2 where the first cured layer is attached. The printing reference surface refers to the surface on which the photocurable material is irradiated to produce a curing reaction. Typically, the printing reference surface is located inside the container 1. Figure 1 Taking a bottom-surface exposure (or scanning) type 3D printing device as an example, its printing reference surface is usually the lower surface of the photocurable material inside container 1. Since the lower surface of the photocurable material inside container 1 covers the bottom surface inside container 1, the printing reference surface can also be regarded as the bottom surface inside container 1. Taking a top-surface exposure (or scanning) type 3D printing device as an example, its printing reference surface is the upper surface of the photocurable material contained inside container 1.

[0044] Specifically, in 3D printing, a build platform serves as the platform for printing 3D objects, and the 3D object is constructed through layer-by-layer printing. During printing, a photocurable material is first irradiated by an energy radiation system to form a first cured layer. This first cured layer adheres to the build platform's surface. The build platform moves a predetermined distance under the drive of a Z-axis mechanism, filling this predetermined distance with the photocurable material to be cured. The energy radiation system then irradiates the surface again to obtain a second cured layer accumulated on top of the first cured layer. This process is repeated multiple times, involving filling, irradiation, and separation, until each cured layer is attached and accumulated on the build surface, thus obtaining the 3D object.

[0045] In some embodiments, such as Figure 1 and Figure 2 As shown, container 1 can be placed on a support platform 6, which includes a light-transmitting part and a support part. The support part can support container 1, and the light-transmitting part allows light projected by energy radiation system 4 to pass through to irradiate the photocurable material inside container 1.

[0046] In one embodiment, the photocurable material contained in container 1 includes any liquid or powder material that is easily photocurable. Examples of liquid materials include photocurable resin liquids, or resin liquids mixed with additives, pigments, dyes, etc. Powder materials include, but are not limited to, ceramic powders, color additive powders, etc. The material of the container includes, but is not limited to, glass, plastic, resin, etc. In some implementation scenarios, the container is often also referred to as a resin tank.

[0047] In one embodiment, the energy radiation system 4 irradiates the photocurable material inside the container 1 according to the printing strategy of each layer in the printing data generated from the 3D model corresponding to the 3D object to obtain the 3D object. For example, the energy radiation system 4 projects the layered images in the 3D model onto the printing reference surface inside the container 1 so that the photocurable material is cured into a cured layer corresponding to each layered image. Alternatively, the energy radiation system 4 scans the printing reference surface inside the container 1 based on the layered images so that the photocurable material is cured into a cured layer corresponding to each layered image. In some scenarios, the energy radiation system may also be referred to as an optical system or an optomechanical system.

[0048] In one embodiment, the Z-axis movement mechanism includes a drive unit and a connecting unit. The drive unit, for example, is a drive motor, specifically a servo motor, which selects forward or reverse rotation based on received control commands to control lifting and lowering, and drives the connecting unit to move vertically and vertically according to the speed, rotational acceleration, torque, etc., indicated by the control commands. The control commands include the lifting direction and specific operating parameters. The operating parameters include, for example, values ​​such as speed, rotational acceleration, or torque. The connecting unit includes, for example, a fixed guide rail and a movable component that can move on the fixed guide rail and is connected to the construction platform. The movable component is driven by the drive unit to move the construction platform vertically.

[0049] Please see Figures 2 to 6 , Figure 3 and Figure 4 The diagrams shown are schematic representations of the three-dimensional structure and the disassembled structure of the platform constructed in one embodiment of this application. Figure 5 The diagram shown is a schematic representation of the construction platform in a printing state according to one embodiment of this application. Figure 6 This is a schematic diagram showing the construction platform in a stripped state in one embodiment of this application. (See diagram below.) Figures 2 to 6 As shown, the construction platform 2 includes a construction plate 20, a peeling mechanism 21, and a pushing mechanism 22 (in... Figure 4(The text is omitted). The build plate 20 has a build surface 200, on which at least one receiving groove 201 is formed, extending from a first side of the build plate 20 to a second side opposite to the first side. The peeling mechanism 21 includes a first connecting component 211 rotatably connected to the first side of the build plate 20, a second connecting component 212 connected to the second side of the build plate 20, and a separating portion 210 accommodated in the receiving groove 201 and bridging the first connecting component 211 and the second connecting component 212. The pushing mechanism 22 is disposed on the second side of the build plate 20, and the pushing mechanism 22 is used to contact and push the second connecting component 212 when the build plate 20 moves relative to it (the pushing process is as follows). Figure 6 (As indicated by arrow D) the separating part 210 rotates around the first connecting component 211 as a fulcrum until it protrudes from the building surface 200 (the rotation process is as follows). Figure 6 (As indicated by the R arrow) to peel off the 3D object formed on the build surface 200.

[0050] Specifically, such as Figure 3 and Figure 5 As shown, the separating portion 210 is accommodated within a receiving groove 201 formed in the building plate 20, which prevents the separating portion 210 from protruding from the building surface 200 of the building plate 20. The building surface 200 appears as a flat surface when viewed from the side (as shown). Figure 5 As shown), the build platform 2 can then be used for printing. During the first layer printing, the build plate 20 is moved to a position where its build surface 200 is at a predetermined distance from the printing reference surface (this predetermined distance corresponds to the thickness of the first cured layer). The photocurable material fills the space within the predetermined distance (this space includes not only the portion below the build surface 200 but also the portion within the receiving groove 201 where the photocurable material can enter). The energy irradiated by the energy radiation system onto the printing reference surface is only sufficient to cure the photocurable material of the predetermined distance thickness to form the first cured layer, while the photocurable material filled in the receiving groove 201 remains in a flowable state. Therefore, as... Figures 3 to 6 The construction platform 2 shown does not affect its printing function while still having the ability to peel off 3D objects. Additionally, as... Figure 6 As shown, the separation part 210 rotates around the first connecting component 211 to protrude from the construction surface 200, so that the protrusion of the separation part 210 is not integral, but gradually protrudes from one side (second side) to the other side (first side) of the construction plate 20. This ensures that the peeling of the 3D object from the construction surface is gradually peeled off from the edge of the 3D object, thus ensuring the quality of the peeling.

[0051] It should be understood that the first side and the second side of the construction plate 20 refer to any two opposite sides of the construction plate 20. Taking the construction plate 20 as a rectangular plate as an example, the first side and the second side of the construction plate 20 can respectively correspond to Figures 2 to 6 The left and right sides of the construction board 20 shown are, at this time, as... Figures 2 to 6 As shown, the receiving groove 201 extends from the left to the right. Of course, the first and second sides of the building plate 20 can also correspond respectively. Figures 2 to 6 The front and rear sides of the construction plate 20 shown only need to be configured such that the receiving groove 201 extends from the front to the rear, and the positions of each component of the peeling mechanism 21 (first connecting component 211, second connecting component 212, separation part 210) and the pushing mechanism 22 are also adjusted accordingly. This application does not impose any restrictions on this.

[0052] In some embodiments, a receiving groove may be formed on the construction surface of the construction board, and the separating portion is correspondingly configured to be accommodated in one of the receiving grooves. In other embodiments, multiple receiving grooves may be formed on the construction surface of the construction board, such as two, three, four, five, six, seven, eight, nine, or more receiving grooves, and the separating portions are correspondingly configured to be accommodated in multiple receiving grooves respectively. In this embodiment, the multiple receiving grooves may be evenly spaced or non-spaced. Please refer to [link to previous document]. Figure 7 This application is shown as being in Figure 5 A cross-sectional view of the construction platform in the illustrated embodiment is shown. Figure 7 As shown in the example, the construction plate 20 has six receiving slots 201, and the interval between two adjacent receiving slots 201 is the same.

[0053] like Figure 3 and Figure 7 In the illustrated embodiment, the receiving groove 201 is configured as a rectangular groove extending in a straight line from the first side to the second side. In other embodiments, the receiving groove 201 may also have other extension forms or groove shapes. For example, the receiving groove 201 may extend from the first side to the second side in the form of a broken line or a wavy line, and the groove shape of the receiving groove 201 may also be configured as an arc groove or other irregular shape. This application does not limit this.

[0054] Please see Figure 8 This application is displayed as such. Figure 7 A partially enlarged view of the cross-section shown. In one embodiment, as... Figure 8 As shown, the width w2 of the receiving groove 201 is less than the width occupied by the 3D object on the build surface 200, which ensures that at least a portion of the first cured layer of the 3D object is attached to the build surface 200. Further, as... Figure 7As shown, the interval w1 between two adjacent receiving grooves 200 is less than the width occupied by the 3D object on the building surface 200. This means that the first layer of the 3D object not only occupies and is attached to the part of the building surface 200 corresponding to the interval, but also blocks the opening of the receiving groove 200. This ensures that the separation part 210 can push the 3D object to separate from the building surface when peeling (that is, peeling the 3D object from the building platform).

[0055] In one embodiment, such as Figure 8 As shown, when the separating portion 210 is accommodated within the receiving groove 201, it maintains a preset distance h with the building surface 200. This preset distance h prevents the first cured layer of the formed 3D object from attaching to the separating portion 210, thus hindering the peeling of the 3D object. In one example, the preset distance h is configured as any value less than 1 mm, for example, it can be configured as 1 mm, 0.8 mm, 0.5 mm, 0.3 mm, 0.2 mm, etc. Preferably, the preset distance h is configured as 1 mm. It should be understood that the preset distance h refers to the closest distance between the building surface 200 and the separating portion 210.

[0056] In one embodiment, such as Figure 8 As shown, the separating portion 210 is accommodated within the receiving groove 201 with a clearance fit. That is, the size of the receiving groove 201 is larger than the size of the separating portion 210, and a gap exists between the separating portion 210 and the groove wall of the receiving groove 201 when the separating portion 210 is accommodated in the receiving groove 201, allowing the separating portion 210 to smoothly enter or protrude from the receiving groove 201. In other embodiments, the separating portion 210 may also be configured to be accommodated within the receiving groove 201 in a fitted manner, as long as the separating portion 210 can protrude from the receiving groove 201 under pushing; this application does not impose any limitations on this.

[0057] In one embodiment, the separating portion 210 is configured to have an arcuate surface facing the building surface 200, so that when the separating portion 210 is rotated to protrude from the building surface 200, it contacts the 3D object through the arcuate surface, thus avoiding damage to the 3D object. For example, the separating portion 210 may be configured as follows: Figure 4 and Figure 8 The circular rod structure shown can also be configured as a semi-circular rod structure or other structures with curved surfaces; this application does not impose any restrictions on this.

[0058] like Figure 3 and Figure 4 As shown, when the separating portion 210 is accommodated in the receiving groove 201, one end (defined as the first end) is located on the first side of the building plate 20 and connected to the first side through the first connecting component 211, and the other end (defined as the second end) is located on the second side of the building plate 20 and connected to the second side through the second connecting component 212. The separating portion 210 is presented as follows: Figure 3 It is shown to bridge between the first connecting component 211 and the second connecting component 212.

[0059] In one embodiment, such as Figure 4 As shown, the first connecting assembly 211 includes a shaft assembly 2110 and a rotating member 2111 rotatably connected to the shaft assembly 2110. The shaft assembly 2110 includes a support portion 21100 and a rotating shaft 21101 horizontally disposed on the support portion 21100. The support portion 21100 is fixed to the back surface 202 of the construction plate 20, which is another surface opposite to the construction surface 200. The rotating member 2111 includes a rotating portion 21110 sleeved on the rotating shaft 21101 and an extended fixed plate 21111. The first end of the separating portion 210 is fixed to the fixed plate 21111. Thus, when the separating part 210 rotates downward, it will push the rotating part 2111 to rotate around the rotating shaft 21101. At this time, the rotating shaft 21101 can be regarded as the fulcrum of the rotation of the separating part 210, ensuring that the separating part 210 can be connected to the building plate 20 with the first connecting component 211 as the connecting part, and can also rotate with the first connecting component 211 as the fulcrum.

[0060] Furthermore, the support 21100 can be configured to include two opposing columns, which can be fixed to the back 202 of the construction plate 20 by bolts or other fasteners. The rotating shaft 21101 is horizontally connected between the two columns. The rotating member 2111 is sleeved on the rotating shaft 21101 via the rotating part 21110, so that the fixing plate 21111 can rotate about the rotating shaft 21101 as the axis of rotation. The fixing plate 21111 can be provided with a number of fixing holes corresponding to the number of separation parts 210. The end face of the first end of the separation part 210 is provided with a connecting hole, which can be screwed into the connecting hole of the separation part 210 through the fixing hole on the fixing plate 21111, thereby fixing the separation part 210 to the fixing plate 21111.

[0061] In one embodiment, such as Figure 4 , Figure 6 ,and Figure 9 As shown, Figure 9 This application is displayed. Figure 6 The diagram shows a partial enlarged view of the construction platform in the stripped state. The second connecting assembly 212 includes a connecting portion 213 and a retaining mechanism 214. The connecting portion 213 is fixedly connected to the second end of the separating portion 210 and is used to be pushed by the pushing mechanism 22 (as shown in the diagram). Figure 9 As indicated by arrow D, the thrust generated by this push is directed towards the construction surface, and can be further described as thrust D) causing the separating part 210 to rotate (as shown in the image). Figure 9As indicated by arrow R in the diagram, which can also be described as rotation R). A retaining mechanism 214 is disposed on the second side and connected to the connecting portion 213. The retaining mechanism 214 is used to apply a force away from the building surface toward the connecting portion 213 (as shown by...). Figure 9 As indicated by arrow F in the diagram, which can also be described as a force F, the connecting portion 213 holds or returns the separating portion 210 to the receiving groove 201 when not being pushed.

[0062] In other words, when the pushing mechanism 22 pushes the connecting part 213, the connecting part 213 bears both the thrust D applied by the pushing mechanism 22 and the force F applied by the holding mechanism 214 that moves it away from the build surface. When the thrust D is greater than the force F, for example, when the build plate 20 is continuously raised by the Z-axis moving mechanism, causing the thrust D applied by the pushing mechanism 22 to continuously increase, the connecting part 213 is pushed to rotate R, and the separating part 210 can thus protrude from the build surface to achieve the peeling of the 3D object. When the thrust D is less than the force F or there is no thrust, for example, when the build plate 20 is continuously lowered by the Z-axis moving mechanism, causing the connecting part 213 to gradually move away from the pushing mechanism 22, the connecting part 213 is pulled by the restoring force F to rotate in the opposite direction (i.e., a rotation opposite to the rotation R), and the separating part 210 can thus return to or be held in the receiving groove 201 for 3D printing.

[0063] In one embodiment, such as Figure 4 , Figure 7 , Figure 9 As shown, the connecting portion 213 may include an actuating portion 2130 and a fixing plate 2131. The actuating portion 2130 is provided corresponding to the pushing mechanism 22 for contacting the pushing mechanism 22 and bearing the thrust D of the pushing mechanism 22. The actuating portion 2130 is also connected to the holding mechanism 214 to bear the force F applied by the holding mechanism 214 away from the building surface. The fixing plate 2131 may extend downward from the actuating portion 2130 for fixing the second end of the separating portion 210. For example, the fixing plate 2131 may be provided with a number of fixing holes corresponding to the number of separating portions 210. A connecting hole is provided on the end face of the second end of the separating portion 210. A bolt can be screwed into the connecting hole on the separating portion 210 through the fixing hole on the fixing plate 2131, thereby fixing the separating portion 210 to the fixing plate 2131.

[0064] In one embodiment, such as Figure 4 and Figure 7As shown, the retaining mechanism 214 includes a positioning part 2140 and an elastic component 2141. The positioning part 2140 is fixedly disposed on the second side of the building plate 20 and has a limiting space 2142 for the movement of the connecting part 213. The elastic component 2141 is disposed on the positioning part 2140 and its elastic restoring force toward the building surface 200 is limited by the positioning part 2140. The elastic component 2141 is also connected to the connecting part 213 so that when the elastic component 2141 elastically restores itself in a direction away from the building surface, it applies a force away from the building surface to the connecting part 213. Further, the connecting part 213 is configured as follows: Figure 4 and Figure 7 In the embodiment shown, which includes an actuating part 2130 and a fixing plate 2131, the actuating part 2130 traverses the limiting space 2142 and is connected to the elastic component 2141.

[0065] The positioning part 2140 restricts the elastic restoring force of the elastic component 2141 toward the construction surface 200. That is, when the elastic component 2141 is compressed, it will exert force at both ends to achieve its own elastic restoration. Figure 4 and Figure 7 In the illustrated embodiment, the end of the elastic component 2141 that is used for elastic recovery toward the construction surface 200 is held against by the positioning part 2140. Since the positioning part 2140 is fixedly mounted on the construction plate 20, the elastic recovery force of the elastic component 2141 toward the end connected to it is difficult to push the positioning part 2140. Therefore, the elastic recovery force of the elastic component 2141 toward the construction surface 200 is restricted by the positioning part 2140 and can only elastically recover in the direction away from the construction surface 200.

[0066] In one embodiment, the positioning part 2140 can be configured as a portal structure fixed to the back surface 202 of the build plate 20, and the internal space of the portal structure forms a limiting space 2142 for the positioning part 2140. Further, the actuating part 2130 in the connecting part 213 traverses and extends out of the limiting space 2142, and the extended portion of the actuating part 2130 can contact and be pushed by the pushing mechanism. When not pushed by the pushing mechanism (i.e., in the printing state), the actuating part 2130, when located in the limiting space 2142, can have a certain gap between itself and the bottom of the limiting space 2142 to provide movement space for the actuating part 2130 during the stripping operation, but it can be in contact with or have a certain distance from the top of the limiting space 2142, as long as the connected separating part 210 is within the receiving groove 201 and does not protrude from the build surface 200.

[0067] In one embodiment, please refer to Figure 10The diagram shows a split structure of the retaining mechanism in one embodiment of this application. Figure 7 and Figure 10 As shown, the positioning part 2140 is provided with a first through hole 2143 communicating with the limiting space 2142. The elastic component 2141 includes a fixing pin 2144 and an elastic element 2145. The pin end passes through the first through hole 2143 and is fixed to the connecting part 213 located in the limiting space 2142, and further fixed to the pushing part 2130 included in the connecting part 213. The elastic element 2145 is sleeved on the fixing pin 2144 and is restricted between the positioning part 2140 and the pin head of the fixing pin 2144 so that the restoring force of the elastic element 2145 toward the pin head causes the fixing pin 2144 to apply a force F away from the building surface to the connecting part 213. For example, the elastic element 2145 can be a spring or a component with elastic force such as rubber.

[0068] The following combination Figure 7 , Figure 10 , Figure 11 The illustrated embodiment explains the working principle of the retaining mechanism. Figure 11 This application is displayed. Figure 6 The diagram shows a cross-sectional view of the build platform in the peeled-off state. During printing, that is, when the separated portion 210 is not pushed out of the build surface 200 (as shown in the diagram). Figure 7 As shown in the diagram, when the elastic element 2145 is fitted onto the fixing pin 2144, one end of it is supported on the end face of the positioning part 2140 facing the pin head of the fixing pin 2144, and the other end contacts the pin head of the fixing pin 2144. At this time, the elastic element 2145 can be in a compressed state or a natural state (for example, the tension of the second connecting component on the fixing pin is insufficient to deform the elastic element 2145), as long as it ensures that the separating part 210 does not protrude from the building surface 200. In this state, the building platform can be used for printing operations. Figure 8 As shown, when the 3D object needs to be peeled off after printing, the build plate 20 is continuously lifted, and the pushing mechanism contacts and further pushes the actuator 2130 downward in the limiting space 2142. This causes the fixing pin 2144 connected to the actuator 2130 to also move downward, and the pin head of the fixing pin 2144 presses down on the elastic member 2145 (compared to...). Figure 8 and Figure 7As can be seen, the actuator 2130 and the fixing pin 2144 have downward displacement (the elastic element 2145 is further compressed), and the downward movement of the actuator 2130 further causes the fixing plate 2131 to drive the separation part 210 to protrude from the building surface 200, which can be used for the peeling of 3D objects. After the peeling is completed, the building plate 20 can be driven to descend. At this time, the pushing mechanism will gradually move away from the actuator 2130, that is, the thrust D is gradually released, and the elastic element 2145 releases elastic force toward the pin head of the fixing pin 2144, thereby pushing the fixing pin 2144 to move upward, further driving the actuator 2130 and the separation part 210 back to the starting position. Figure 7 The status shown is for the next printing.

[0069] It is readily understood that in the above embodiments, since the pin of the fixing pin penetrates the first through hole on the positioning part, and the actuating part rotates during the downward movement, the fixing pin moves along with it. Thus, the pin of the fixing pin may traverse an approximately fan-shaped area. Therefore, in some embodiments, the size of the first through hole on the positioning part is configured to be larger than the size of the pin of the fixing pin, so that the fixing pin can have room to move when it passes through the first through hole on the positioning part. Furthermore, to further ensure that one end of the elastic member can abut against the end face of the positioning part, in some embodiments, the size of the first through hole on the positioning part should also be smaller than the size of the elastic member.

[0070] It should be noted that, Figures 4 to 11 The structure and connection method of the retaining mechanism shown are only one example. In other embodiments, the retaining mechanism may be further modified or the connection method may be changed. Please refer to [link / reference needed]. Figure 12 The diagram shows a structural schematic of the retaining mechanism in another embodiment of this application, wherein the retaining mechanism 214 and Figures 4 to 11 Similar to the examples shown, both include a positioning part 2140 and an elastic component 2142, the main difference being the connection method of the elastic component 2142. The structure and composition of the positioning part 2140 and the elastic component 2142 can be found in any of the aforementioned embodiments; only the differences will be described here. Figure 12 In the illustrated embodiment, the elastic component 2142 is the elastic restoring force that is restricted by the building plate 20 to its orientation toward the building surface 200. Specifically, a second through hole (not shown) corresponding to the first through hole on the positioning part 2140 may be configured on the connecting part 213. The pin tail of the fixing pin 2144 included in the elastic component passes through the first through hole and the second through hole in sequence and is fixed to the bottom of the limiting space (in Figure 12In the middle, the bottom of the limiting space corresponds to the back surface 202 of the building plate 20. The elastic member 2145 is sleeved on the fixing pin 2144 and is restricted between the connecting part 213 and the bottom of the limiting space 2142 so that the restoring force of the elastic member is a force applied toward the connecting part away from the building surface.

[0071] The following are Figure 12 The working principle of the holding mechanism in the illustrated embodiment will be briefly explained. During printing, that is, when the separating part 210 is not pushed out of the build surface 200, one end of the elastic member 2145 is supported on the back side 202 of the build plate 20, and the other end contacts the actuating part 2130 included in the connecting part 213. At this time, the elastic member 2145 can be in a compressed state or a natural state, as long as it can ensure that the separating part 210 does not protrude from the build surface 200. In this state, the build platform can be used for printing. When the 3D object needs to be peeled off after printing, as the build plate 20 is driven to rise, the pushing mechanism will contact and further push the actuating part 2130 to move downward in the limiting space 2142. This causes the actuating part 2130 to press down on the elastic member 2145, and the downward movement of the actuating part 2130 further causes the fixing plate 2131 to drive the separating part 210 to protrude from the build surface 200, which can be used for peeling off the 3D object. After the peeling is completed, the construction plate 20 can be driven down. At this time, the pushing mechanism will gradually move away from the actuating part 2130, and the elastic element 2145 will release elastic force towards the actuating part 2130, thereby pushing the actuating part 2130 to move upward, and further driving the actuating part 2130 and the separation part 210 back to the state in the receiving groove 201, so as to carry out the next printing.

[0072] In one embodiment, such as Figure 2 As shown, the pushing mechanism 22 is positioned at a fixed location. The building plate 20 moves toward the pushing mechanism 22 under the drive of the Z-axis moving mechanism 3, thereby enabling the second connecting component 212 to contact and be pushed by the pushing mechanism 20. The fixed location is, for example, a preset height position on the upper part of the support platform 6, which is higher than the height of the container 1.

[0073] To save on equipment size, the pushing mechanism 22 can be fixed to the Z-axis moving mechanism 3. For example, in the aforementioned embodiment where the Z-axis moving mechanism 3 includes a fixed guide rail, the pushing mechanism 22 can be configured on the fixed guide rail or on a fixed mechanism where the fixed guide rail is located. Of course, an additional fixing mechanism can also be provided for the pushing mechanism 22. This application does not limit the fixing method of the pushing mechanism 22.

[0074] In another embodiment, the pushing mechanism can actively move to push the second connecting component. For example, the pushing mechanism includes a drive mechanism and a blocking member connected to the drive mechanism, the drive mechanism driving the blocking member toward the build plate so that the second connecting component contacts the blocking member and is pushed by the blocking member. It should be understood that while the pushing mechanism moves toward the build plate, the build plate can also be driven toward the pushing mechanism by a Z-axis movement mechanism, thus accelerating the peeling process.

[0075] In one embodiment, such as Figure 1 As shown, the control device 5 in the 3D printing equipment is connected to the Z-axis moving mechanism 3 and the energy radiation system 4. It controls the Z-axis moving mechanism and the energy radiation system to work together to attach an accumulated curing layer onto the build surface to obtain a 3D object, and to control the build platform to rise to a preset position so that the 3D object can be peeled off. The preset position is the position where the second connecting component can be pushed by the pushing mechanism so that the separating part protrudes from the build surface.

[0076] In one embodiment, the control device is an electronic device that includes a processor, such as a computer device, an embedded device, or an integrated circuit with a CPU.

[0077] In one embodiment, the control device includes a processing unit, a storage unit, and multiple interface units. Further, it may also include at least one of the following: a prompting device, a human-computer interaction device, etc. Each interface unit is connected to an independently packaged device in the 3D printing equipment, such as an energy radiation system and a Z-axis movement mechanism, that transmits data via an interface. The interface type of each interface unit is determined according to the connected device, and includes, but is not limited to: a universal serial interface, a video interface, an industrial control interface, etc.

[0078] For example, the interface unit includes: a USB interface, an HDMI interface, and an RS232 interface. Multiple USB and RS232 interfaces are available. The USB interfaces can connect to human-machine interaction devices, etc. The RS232 interfaces connect to the detection device and the Z-axis movement mechanism. The HDMI interfaces connect to the energy radiation system (optical system). The storage unit is used to store the files required for 3D printing. These files include: program files and configuration files required for CPU operation, etc.

[0079] In some embodiments, the storage unit includes non-volatile memory and a system bus. Examples of the non-volatile memory include solid-state drives (SSDs) or USB flash drives. The system bus connects the non-volatile memory to a CPU, wherein the CPU may be integrated into the storage unit or packaged separately from the storage unit and connected to the non-volatile memory via the system bus.

[0080] In some embodiments, the memory may include Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc. The memory is used to store programs (e.g., printing programs, stripping programs, etc.), which the processor executes upon receiving an execution instruction.

[0081] In some embodiments, the processing unit includes at least one of the following: a CPU or a chip with an integrated CPU, a programmable logic device (FPGA), and a multi-core processor. The processing unit may further include memory, registers, or other storage for temporary data storage.

[0082] In some embodiments, the processor includes an integrated circuit chip with signal processing capabilities; or a general-purpose processor, such as a digital signal processor (DSP), application-specific integrated circuit (ASIC), discrete gate or transistor logic device, or discrete hardware component, capable of controlling the various structures or components disclosed in the embodiments of this application to execute corresponding methods, steps, and logic block diagrams. The general-purpose processor may be a microprocessor or any conventional processor.

[0083] In summary, the construction platform and 3D printing equipment using the same disclosed in this application are configured with a pushing mechanism and a peeling mechanism including a separating part in the construction platform. The peeling mechanism can drive the separating part to protrude from the construction surface under the pushing mechanism, thereby peeling the 3D object from the construction surface, thus improving the efficiency and quality of 3D object peeling.

[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 characterized by, include: A construction plate having a construction surface, wherein at least one receiving groove is formed on the construction surface extending from a first side of the construction plate to a second side opposite to the first side; The peeling mechanism includes a first connecting component rotatably connected to the first side, a second connecting component connected to the second side, and a separating portion accommodated within the receiving groove and bridging the first connecting component and the second connecting component; A pushing mechanism, disposed on the second side, is used to contact and push the second connecting component when the building plate moves relative to it, causing the separating part to rotate about the first connecting component as a fulcrum to protrude from the building surface, so as to peel off the 3D object formed on the building surface.

2. The build platform of claim 1, wherein, The first connection component includes: A shaft assembly includes a support portion fixed to the back of the building plate and a pivot shaft transversely disposed on the support portion; The rotating component includes a rotating part sleeved on the rotating shaft and a fixed plate extending therefrom, wherein the first end of the separating part located on the first side is fixed to the fixed plate.

3. The build platform of claim 1, wherein, The second connection component includes: A connecting part is fixedly connected to the second end of the separating part located on the second side, and is used to drive the separating part to rotate under the push of the pushing mechanism; A retaining mechanism, disposed on the second side and connected to the connecting portion, is used to apply a force away from the building surface toward the connecting portion so that the connecting portion retains or returns the separating portion into the receiving groove when not pushed.

4. The build platform of claim 3, wherein, The retaining mechanism includes: The positioning part is fixedly disposed on the second side of the building plate and has a limiting space for the movement of the connecting part; An elastic component, disposed in the positioning portion and whose elastic restoring force toward the building surface is restricted by the positioning portion or the building plate, is also connected to the connecting portion so that when the elastic component elastically restores itself in a direction away from the building surface, it applies a force away from the building surface to the connecting portion.

5. The build platform of claim 4, wherein, The connecting part includes an actuating part and a fixing plate extending downward from the first plate. The actuating part passes through the limiting space and is connected to the elastic component. The second end of the separating part extends out from the second side to be fixed to the fixing plate.

6. The build platform of claim 4, wherein, The positioning part is provided with a first through hole communicating with the limiting space; the elastic component includes: A fixing pin, the end of which passes through the first through hole and is fixed to the connecting part located in the limiting space; An elastic element, fitted onto the retaining pin, is constrained between the positioning portion and the pin head of the retaining pin such that the restoring force of the elastic element toward the pin head causes the retaining pin to exert a force on the connection portion away from the building surface.

7. The build platform of claim 4, wherein, The positioning part is provided with a first through hole communicating with the limiting space, and the connecting part is provided with a second through hole corresponding to the first through hole; the elastic component includes: A fixing pin, the end of which passes through the first through hole and the second through hole in sequence and is fixed at the bottom of the limiting space; An elastic element, fitted onto the retaining pin, is constrained between the bottom of the connection and the limiting space such that the restoring force generated by the elastic element is a force applied toward the connection away from the building surface.

8. The build platform of claim 1, wherein, When the separation part is housed in the receiving groove, it maintains a distance of at least 1 mm from the construction surface.

9. The build platform of claim 1, wherein, The receiving tanks are configured as multiple equally spaced tanks, and the separation section is configured corresponding to the number of receiving tanks.

10. The build platform of claim 1, wherein, The width of the receiving slot and the spacing between two adjacent receiving slots are both smaller than the width occupied by the 3D object on the construction surface.

11. The build platform of claim 1, wherein, The separation section has an arcuate surface facing the construction surface.

12. The build platform of claim 1, wherein, The pushing mechanism is positioned in a fixed location. When the building plate moves toward the pushing mechanism under the drive of a Z-axis moving mechanism, the second connecting component comes into contact with and is pushed by the pushing mechanism.

13. The build platform of claim 1, wherein, The pushing mechanism includes a driving mechanism and a blocking member connected to the driving mechanism. The driving mechanism is used to drive the blocking member to move toward the building plate so that the second connecting component contacts and is pushed by the blocking member.

14. A 3D printing device, characterized by include: Containers used to hold UV-curable materials; The construction platform as described in any one of claims 1-13; 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 Z-axis moving mechanism and the energy radiation system to work together to attach an accumulated curing layer on the construction surface to obtain a 3D object and to control the construction platform to rise to a preset position so that the 3D object can be peeled off.

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