CN220700401U - Photo-curing type three-dimensional printing equipment and printing system - Google Patents

Abstract

The utility model discloses a photo-curing type three-dimensional printing device, which comprises: a container for Cheng Fangguang sensitive resin, a lifting table and an image exposure system, wherein the lifting table comprises a workpiece forming platform and a lifting driving mechanism, and a forming area of each printing workpiece on the workpiece forming platform is provided with at least a weakening part which enables the printing workpiece formed on the forming area to be easily separated from the forming area; and a workpiece collection device comprising a vibration assembly and a collection element, the vibration assembly for generating, by vibration, at least vibrational energy capable of releasing the printed workpiece from the workpiece forming stage to a bottom of the printed workpiece below the workpiece forming stage to separate the printed workpiece from the workpiece forming stage; the utility model solves the problems of low collection efficiency and risk of workpiece damage in the existing manual workpiece collection operation, and correspondingly, the utility model also discloses a photo-curing three-dimensional printing system.

Description

Photo-curing type three-dimensional printing equipment and printing system

Technical Field

The embodiment of the application relates to the technical field of 3D printing, in particular to a photo-curing type three-dimensional printing device and a printing system.

Background

The three-dimensional printing technology is characterized in that a computer three-dimensional design model is taken as a blue book, special materials such as metal powder, ceramic powder, plastics, cell tissues and the like are stacked and bonded layer by utilizing a laser beam, a hot melt nozzle and the like through a software layered discrete and numerical control molding system, and finally, a solid product is manufactured by stacking and molding. Different from the traditional manufacturing industry that the raw materials are shaped and cut in a mechanical processing mode such as a die, a turning and milling mode and the like to finally produce a finished product, three-dimensional printing changes a three-dimensional entity into a plurality of two-dimensional planes, and the manufacturing complexity is greatly reduced through material processing and layer-by-layer stacking production. The digital manufacturing mode can directly generate parts with any shape from the computer graphic data without complex process, huge machine tool and numerous manpower, so that the production and manufacturing can be extended to a wider production crowd range.

The photocuring method is a mature three-dimensional printing technology at present, and is used for carrying out material accumulation molding by utilizing the principle that photosensitive resin is cured after being irradiated by ultraviolet light, and has wide application in the fields of molds, customized commodities, medical jigs, prostheses and the like due to high molding precision.

The existing photocuring three-dimensional printer is provided with a forming groove for bearing forming materials, the printing platform is arranged in the forming groove, and the printing platform is driven by the lifting mechanism to vertically translate in the forming groove, so that layer-by-layer curing of the materials in quantitative forming materials can be realized.

However, the existing photo-curing type three-dimensional printing apparatus has problems in that: the existing photocuring type three-dimensional printing equipment generally needs to manually scoop down and collect printed printing workpieces from a printing platform by using a shovel blade after printing the printing workpieces, the manual collection mode is firstly efficient and underground, secondly, for some application scenes, such as printing tooth models, the photocuring type three-dimensional printing equipment needs to print hundreds of printing once, if the photocuring type three-dimensional printing equipment needs to be manually shoveled down one by one, time and labor are wasted, frequent shoveling is easy to cause work fatigue of a shoveler, efficiency is gradually reduced, and the risk that the printing workpieces are shoveled down manually is easily caused.

Disclosure of Invention

The utility model mainly aims to provide a photo-curing type three-dimensional printing device and a printing system, which are used for solving the problems that a printing workpiece is easy to damage and the manual collection efficiency is low in the existing manual collection operation.

To achieve the above object, embodiments of the present application provide a photocurable three-dimensional printing apparatus, including:

a workpiece printing apparatus comprising:

a container for Cheng Fangguang sensitive resin;

the lifting platform comprises a workpiece forming platform and a lifting driving mechanism, the lifting driving mechanism drives the workpiece forming platform to move up and down relative to the container, the workpiece forming platform is used for bearing printing workpieces, and a forming area of each printing workpiece on the workpiece forming platform is at least provided with a weakening part which enables the printing workpiece formed in the forming area to be easily separated from the forming area;

an image exposure system positioned above the container to project a preset beam of light toward the workpiece forming stage to form the printed workpiece on the surface of the workpiece forming stage;

and

A workpiece collection device comprising:

a vibration assembly for generating at least vibrational energy capable of releasing the printed workpiece from the workpiece forming platen to a bottom of the printed workpiece by vibration below the workpiece forming platen to separate the printed workpiece from the workpiece forming platen;

and the collecting piece is used for collecting the printed workpiece separated from the workpiece forming platform and sending the printed workpiece to a receiving part.

Optionally, the weakening portion is at least arranged in each forming area to reduce the contact surface between the bottom of the printing workpiece and the forming area when the printing workpiece is formed in the forming area, so as to reduce the structural strength of connection between the bottom of the printing workpiece and the workpiece forming platform, and enable the printing workpiece to be easily separated from the forming area.

Optionally, the weakened portion comprises one or more weakened structures, and when the weakened portion comprises a plurality of weakened structures, the plurality of weakened structures are uniformly distributed in the forming area.

Optionally, the weakened area of the weakened portion occupies 1/3 to 1/2 of the area of the molding area.

Optionally, when the printed workpiece is a dental model, the plurality of weakened structures are uniformly distributed in the front tooth area and/or the rear tooth area of the molding area.

Optionally, the weakened portion includes one or more through holes disposed in each forming region along a line perpendicular to the bottom of the printed workpiece through the workpiece forming platform.

Optionally, the vibration assembly includes a plurality of directional vibrators, at least one or more directional vibrators are disposed below each molding area, and each directional vibrator generates vibration energy to the bottom of the printing workpiece through vibration so as to release the printing workpiece from the workpiece molding platform.

Optionally, the vibration assembly further includes a vibration rod disposed corresponding to at least one through hole of each molding area, one end of the vibration rod is disposed in the through hole, the other end of the vibration rod is connected with the directional vibrator, the vibration rod contacts with the bottom of the printing workpiece under the vibration action of the directional vibrator, and vibration energy generated by the directional vibrator is transferred to the printing workpiece, so that the printing workpiece is released from the workpiece molding platform.

Optionally, the vibration assembly further comprises a supporting platform arranged below the workpiece forming platform, the supporting platform is provided with accommodating grooves for accommodating the vibrators corresponding to the vibration rods, and the directional vibrators are connected with the vibration rods after being mounted in the accommodating grooves.

Optionally, the collecting member includes a collecting scraper that spans across both sides of the workpiece forming stage to horizontally move along a horizontal plane between a side of the workpiece forming stage away from the receiving section to a side adjacent to the receiving section, and collect the released printing workpiece to the receiving section.

Optionally, the collecting member further includes a blade connected to the collecting blade for releasing the unreleased receiving member while collecting the printing workpiece.

Optionally, the blade includes a blade edge portion and a blade body portion connected to the blade edge portion, wherein a side of the blade body portion opposite to the blade edge portion is a blade back portion, the thickness of the blade edge portion is 0.05 mm-1.0 mm, and the blade gradually thickens from the blade edge portion to the blade back portion so that the blade contacts with the bottom of an unreleased printing workpiece to release.

Optionally, the collection scraper is connected to the knife back.

Optionally, the overall height of the collection scraper and the back of the blade is at least greater than the center of gravity of the printed workpiece.

Optionally, the collecting scraper is connected to the blade portion.

Optionally, the collecting scraper is a straight baffle or an arc baffle.

Optionally, the photo-curing three-dimensional printing device further comprises an automatic typesetting system, which is used for receiving a plurality of three-dimensional models, typesetting the three-dimensional models, outputting the typeset three-dimensional models to the printing device, and printing the typeset three-dimensional models by the printing device.

Optionally, the photo-curing type three-dimensional printing apparatus further comprises an automatic liquid replenishing device to replenish the photosensitive resin to the container as needed.

Optionally, the automatic fluid infusion device includes:

the liquid supplementing box is arranged above the container and is used for accommodating photosensitive resin;

an electric valve connected to the bottom of the bottom and/or the side of the fluid-replenishing tank;

when the container needs to be replenished with liquid, the electric valve is opened, so that the photosensitive resin in the replenishing liquid box flows into the container.

In order to achieve the above object, the present utility model further provides a light-curable three-dimensional printing system, which includes a host computer and a plurality of light-curable three-dimensional printing devices according to the above embodiments;

the upper computer is used for inquiring the state of each photo-curing type three-dimensional printing device when receiving a printing task, and if the photo-curing type three-dimensional printing device is idle, the upper computer sends a three-dimensional model corresponding to the current task to one or more photo-curing type three-dimensional printing devices in the idle state for printing;

the light-curing type three-dimensional printing equipment is used for automatically printing the three-dimensional model by utilizing the printing device after receiving the three-dimensional model, automatically releasing the printed printing workpiece by utilizing the workpiece collecting device and automatically collecting the printed printing workpiece to the receiving component.

Compared with the prior art, the photo-curing type three-dimensional printing equipment and the printing system have the following beneficial effects:

1. the utility model designs a weakening part for enabling the printed workpiece formed in the forming area to be easily separated from the forming area for at least each printed workpiece on the workpiece forming platform, then utilizes a vibration assembly to generate vibration energy which is at least capable of releasing the printed workpiece formed in the workpiece forming platform from the workpiece forming platform to the bottom of the printed workpiece through vibration below the workpiece forming platform so as to separate the printed workpiece from the workpiece forming platform, and finally utilizes a collecting piece to collect the separated printed workpiece, thereby realizing the automatic collection purpose of the workpiece of the photo-curing three-dimensional printing equipment and improving the workpiece collection efficiency;

2. according to the utility model, the weakening part is designed to be the through hole penetrating through the workpiece forming platform, and the vibration rods are correspondingly designed for the through holes, so that the vibration rods are contacted with the bottom of the printing workpiece under the vibration action of the directional vibrator, and the vibration energy generated by the directional vibrator is transmitted to the upper part of the through hole, so that the efficiency of releasing the printing workpiece from the workpiece forming platform is improved.

3. According to the utility model, the blade is additionally arranged on the collecting piece, so that the printing workpiece which is separated by vibration energy and is not completely separated can be further separated in the process of collecting the printing workpiece, and the collecting efficiency of the printing workpiece is further improved.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings.

FIG. 1 is a schematic diagram of a photo-curable three-dimensional printing apparatus according to some embodiments of the present utility model;

FIG. 2 is a schematic illustration of each forming area of the workpiece forming table having a weakened section according to some embodiments of the present utility model;

FIG. 3 is a schematic view of a uniformly distributed weakened section on a workpiece forming table according to some embodiments of the utility model;

FIG. 4 is a schematic illustration of a plurality of weakened structures uniformly distributed in each molding area according to some embodiments of the present utility model;

FIG. 5 is a schematic illustration of a printed workpiece formed on a workpiece forming station having weakened portions in accordance with some embodiments of the present utility model;

FIG. 6 is a schematic illustration of a molded floor mounted vibration assembly in accordance with some embodiments of the present utility model;

FIG. 7 is a schematic illustration of a molded floor mounted vibration assembly according to further embodiments of the present utility model;

FIG. 8 is a schematic view of a molded floor mounted vibration assembly in accordance with still other embodiments of the present utility model;

FIG. 9 is a schematic view of a vibration assembly including a vibration rod according to other embodiments of the present utility model;

FIG. 10 is a cross-sectional view taken along line AA' of FIG. 9;

FIG. 11 is a schematic illustration of printed workpiece collection using a collection element in accordance with some embodiments of the utility model;

FIG. 12 is a schematic view of a collection drive device according to some embodiments of the utility model;

FIG. 13 is a schematic view of a collecting driving device according to other embodiments of the present utility model;

FIG. 14 is a schematic view of a blade in accordance with some embodiments of the utility model;

FIG. 15 is a schematic view of a collection baffle connected to a blade portion for collection in some embodiments of the present utility model;

FIG. 16 is a schematic view of a collection baffle attached to the back of a knife for collection in some embodiments of the utility model;

FIGS. 17-19 are schematic views of a process for collecting printed workpieces in further embodiments of the utility model;

FIG. 20 is a schematic view of a photo-curing type three-dimensional printing apparatus according to other embodiments of the present utility model;

fig. 21 is a schematic structural diagram of a photo-curing three-dimensional printing system according to another embodiment of the present utility model.

Detailed Description

In order to make the above objects, features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, reference is made to the accompanying drawings, which describe several embodiments of the present application. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present disclosure. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present application is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "upper," and the like, may be used herein to facilitate a description of one element or feature as illustrated in the figures as being related to another element or feature.

Although the terms first, second, etc. may be used herein to describe various elements or parameters in some examples, these elements or parameters should not be limited by these terms. These terms are only used to distinguish one element or parameter from another element or parameter. For example, a first moving component may be referred to as a second moving component, and similarly, a second moving component may be referred to as a first moving component, without departing from the scope of the various described embodiments. The first mobile component and the second mobile component are both described as one mobile component, but they are not the same mobile component unless the context clearly indicates otherwise. Similar situations also include the first rail and the second rail, or the first drive member and the second drive member.

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 will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or" and/or "as used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; A. b and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.

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 will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or" and/or "as used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; A. b and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.

According to the background technology, when the existing photo-curing three-dimensional printing equipment collects printed workpieces after the printed workpieces are printed, the printed workpieces are manually shoveled from a printing platform by a shovel blade, the efficiency of the manual collection mode is lower, hundreds of photo-curing three-dimensional printing equipment needs to be printed at one time for some application scenes, such as printing tooth models, if the photo-curing three-dimensional printing equipment needs to be shoveled one by one manually, time and labor are wasted, frequent shoveling pieces easily cause work fatigue of shovelers, the efficiency is gradually reduced, and the risk that the printed workpieces are shoveled manually is easily caused.

Based on the above, the utility model provides a photo-curing three-dimensional printing device, which comprises a workpiece printing device and a workpiece collecting device, wherein the workpiece printing device comprises: a container for Cheng Fangguang photosensitive resin, a lift table and an image exposure system, the lift table comprising a work-piece forming stage for carrying a formed printing work-piece, each forming region on which a printing work-piece is formed having at least a weakened portion for facilitating separation of the printing work-piece formed in the forming region from the forming region, and a lift drive mechanism for driving the work-piece forming stage up and down relative to the container so as to effect layer-by-layer curing of the photosensitive resin in the container under a light beam projected by the image exposure system, and an image exposure system above the container so as to project a light beam to the work-piece forming stage to form the printing work-piece on the work-piece forming stage; the work collecting device includes: a vibration assembly for generating at least vibrational energy capable of releasing the printed workpiece from the workpiece forming platen to a bottom of the printed workpiece by vibration below the workpiece forming platen to separate the printed workpiece from the workpiece forming platen; the utility model provides a workpiece forming platform, which comprises a workpiece forming platform, a workpiece collecting part, a vibration component, a workpiece collecting part, a workpiece collecting device, a workpiece forming platform, a workpiece collecting device and a photo-curing type three-dimensional printing device.

Implementation details of the photocurable three-dimensional printing apparatus described in the present application will be specifically described below with reference to specific embodiments, and the following description is provided only for convenience of understanding, and is not necessary to implement the present embodiment.

An exemplary embodiment of the present application provides a photo-curing type three-dimensional printing apparatus, as shown in fig. 1, the photo-curing type three-dimensional printing apparatus 100 including: a control device 120, a work printing device including a container 101 for Cheng Fangguang photosensitive resin, a lift table, and an image exposure system 104 for curing the photosensitive resin, and a work collecting device including a vibration assembly 111 for separating a printing work 300 molded to the lift table from the lift table by vibration, and a collecting member 112 for collecting the released printing work 200 from the lift table to a receiving member 130.

Wherein the container 101 is filled with a Cheng Fangguang sensitive resin, the lifting table comprises a workpiece forming platform 102 and a lifting driving mechanism 103, the container 101 is at least sized so that the lifting table can freely lift in the container 101, when the container 101 is filled with the photosensitive resin, the container 101 is at least lowered to the bottom of the container 101, the workpiece forming platform 102 can be covered by a light-curing material in the container 101, an image exposure system 104 is positioned above the container 101 to project a preset light beam to the workpiece forming platform 102, the lifting table comprises the workpiece forming platform 102 and the lifting driving mechanism 103, the lifting driving mechanism 103 drives the workpiece forming platform 102 to move in the vertical direction in the container 101, the workpiece forming platform 102 is provided with a forming area 1023 corresponding to forming each printing workpiece, the workpiece forming platform 102 is provided with a forming end surface 1021 and a forming bottom surface 1022, the forming end surface 1021 is a horizontal surface of the workpiece forming platform 102 for forming the printed workpiece 200, for the workpiece forming platform 102, a forming area 1023 of each printed workpiece is preset for the corresponding formed printed workpiece on the forming end surface (forming end surface refers to the horizontal surface of the workpiece forming platform 102 for forming the printed workpiece 200), as shown in fig. 2, the forming area 1023 is indicated by a dotted line, so that each printed workpiece is formed in the corresponding forming area 1023, the other side opposite to the forming end surface 1021 is a forming bottom surface 1022, at least each forming area 1023 on the workpiece forming platform 102 is provided with a weakened portion 1023a for facilitating separation of the printed workpiece formed in the forming area 1023 from the forming area 1023, as shown in fig. 2, the weakened portions 1023a have a lower structural strength than other non-weakened portions within the forming region 1023, thereby allowing printed workpieces formed in the forming region 1023 to be easily separated from the workpiece forming platform 102; the vibration assembly 111 vibrates in a preset direction (in the embodiments of the present utility model, the preset direction is a direction perpendicular to the workpiece forming table or a direction close to perpendicular to the workpiece forming table), the generated vibration energy is transferred to the bottom of the printed workpiece formed in the forming area, so as to separate the printed workpiece from the workpiece forming table 102, the collecting member 112 moves horizontally along the horizontal surface of the workpiece forming table 102 under the driving of the collecting driving mechanism, so as to collect the released printed workpiece on the surface of the workpiece forming table 102, the control device 120 is connected with the image exposure system 104, the lifting driving mechanism of the lifting table, the vibration driving mechanism of the vibration assembly and the collecting driving mechanism of the collecting member, during the 3D printing process, the image exposure system 204 is controlled to project a beam, the lifting driving mechanism of the lifting table is controlled to deposit a pattern curing layer on the lifting table so as to obtain a formed printed workpiece, then the vibration assembly is controlled to vibrate, so as to generate vibration sufficient to collect the printed workpiece 200 formed on the workpiece forming table 102 from the horizontal surface of the workpiece forming table 102, the vibration energy is released from the workpiece forming table 102 is controlled to separate the printed workpiece 200 from the workpiece forming table 102, and finally, the printed workpiece is separated from the horizontal surface of the workpiece forming table 102 by the collecting member is controlled to be formed on the horizontal surface of the printing table 102, and the printed workpiece is separated from the printed workpiece forming table. The control device 120 is an electronic device including a processor, for example, a computer device, an embedded device, or an integrated circuit with a CPU.

In some embodiments, the lifting driving mechanism 103 may be a Z-axis driving mechanism connected to the frame of the photo-curing type three-dimensional printing apparatus 100, and is used for controllably moving and adjusting the workpiece forming platform 102 along a vertical axis so that the workpiece forming platform 102 can move up and down relative to the container 101, specifically, when printing begins, the workpiece forming platform 102 is immersed in the photosensitive resin in the container 101 and forms a uniform liquid resin film with the liquid surface of the photosensitive resin, after the liquid resin film is irradiated and cured by Ultraviolet light (UV) emitted by the image exposure system 224, the Z-axis driving mechanism drives the workpiece forming platform 102 to descend for a certain distance for performing Ultraviolet light irradiation and curing of the next layer, so circulation is performed until printing ends, and at this time, the printed workpiece 200 is directly cured on the workpiece forming platform 102. In the present utility model, the direction in which the Z-axis driving mechanism drives the workpiece forming platform 102 to move up and down is defined as a vertical direction, and the plane on which the workpiece forming platform 102 is located is a horizontal plane.

Of course, the lifting driving mechanism 103 of the present utility model is not limited to a Z-axis driving mechanism, and any driving mechanism capable of driving the workpiece forming platform 102 to move up and down relative to the container 101 may be used, and in other embodiments, the workpiece forming platform 102 may be connected to the frame of the light-curing three-dimensional printing apparatus 200 through a screw, and the screw is driven to move vertically and axially by the driving mechanism, so as to drive the workpiece forming platform 102 to move up and down relative to the container 101.

Since the photosensitive resin, which is a material for forming the printed workpiece, has a strong viscosity, and is adhered to the workpiece forming stage 102 when formed on the workpiece forming stage 102, it is a primary task to separate the printed workpiece adhered to the workpiece forming stage 102 after forming from the workpiece forming stage 102 during the automatic collection of the printed workpiece, in the prior art, a worker typically uses a tool such as a shovel blade to shovel the printed workpiece, so that the efficiency of a manual shovel is low, and the formed printed workpiece is easily damaged by the shovel blade, so that, in order to achieve the automatic separation of the printed workpiece from the workpiece forming stage, the photocurable three-dimensional printing apparatus 200 of the present embodiment further includes a vibration assembly 111 for separating the printed workpiece 200 from the workpiece forming stage 102, where the vibration assembly 111 is disposed below the workpiece forming stage 102 to generate vibration energy in a predetermined direction below the workpiece forming stage 102 to the bottom of the printed workpiece during the collection of the printed workpiece after photocuring printing is completed.

In some embodiments, considering that it may be difficult to separate the printed workpiece from the workpiece forming stage due to the fact that the photosensitive resin is firmly adhered to the workpiece forming stage 102, the weakened portion 1023a is provided on the workpiece forming stage 102 to facilitate the separation of the printed workpiece 200 from the workpiece forming stage, and the weakened portion 1023 has a smaller structural strength with respect to other non-weakened portions of the workpiece forming stage 102, so that the printed workpiece 200 formed in the forming region is easily separated from the forming region 1023.

In some embodiments, since only the structural strength of each printed workpiece forming area needs to be reduced to make the printed workpiece 200 easily separate from the workpiece forming platform, only each forming area 1023 for forming the printed workpiece needs to have the weakened portion 1023a, however, the utility model is not limited thereto, and in order to facilitate the design of the workpiece forming platform 102, the weakened portion may be uniformly designed on the forming end surface of the whole workpiece forming platform 102, and only each forming area 1023 needs to have a corresponding weakened portion, in embodiments of the utility model, for convenience of subsequent description, a surface of the workpiece forming platform 102 for forming the printed workpiece is referred to as a forming end surface 1021, and another surface opposite to the forming end surface 1021 is referred to as a forming bottom 1022, and in fig. 3, the forming end surface 1021 of the workpiece forming platform is uniformly provided with a schematic view of the weakened portion.

In the embodiments of the present utility model, the weakened portions 1023a are structures designed in the forming areas 1023 to reduce the contact surface with the workpiece forming platform 102 when the printed workpiece is formed in the forming areas 1023, and the reduction of the contact surface reduces the strength of the bottom structure of the printed workpiece formed on the workpiece forming platform 102, so as to facilitate separation, and it is understood that when the printed workpiece 200 is formed in the forming area with the weakened structure, the printed workpiece is easily damaged by external force due to weaker structural strength at the weakened structure, so as to be easily peeled from the workpiece forming platform 102 under the vibration energy generated by the vibration assembly, and meanwhile, as the structure at the weakened structure is damaged, the connection between the whole bottom and the workpiece forming platform 102 is also easily damaged. Generally, the greater the area of the weakened portion, the weaker the strength of the connection between the bottom of the printed workpiece formed on the forming area having the weakened portion and the workpiece forming table 102, and the more easily the vibration energy generated by the vibration assembly will separate, but the larger the area of the weakened portion, the more likely the forming of the printed workpiece will be affected, so in some embodiments, the area of the weakened portion preferably occupies 1/3 to 1/2 of the forming area in order to facilitate the separation of the printed workpiece 200 from the workpiece forming table 102 without affecting the forming of the printed workpiece 200.

In some preferred embodiments, the weakened portion 1023a includes one or more through holes disposed in each forming area, as shown in fig. 2, where each forming area 1023 of each printed workpiece 200 corresponds to at least one through hole, so as to weaken the structural strength of the connection between the printed workpiece 200 and the workpiece forming platform 102 after forming, so that the vibration energy of the vibration assembly 111 can be stripped from the workpiece forming platform 102, and the cross-sectional area of the through hole along the horizontal direction of the workpiece forming platform can be circular, elliptical, or quadrangular, rectangular, or even polygonal, which is not a limitation of the present utility model; the number of through holes in each molding region may be one, as shown in fig. 2, which shows a schematic view of one through hole per molding region, but it is understood that two or more through holes may actually be provided in the molding region 1023 of each printed workpiece 200, and theoretically, the more through holes are provided, the more printed workpiece is easily separated from the workpiece molding platform 102 after molding without affecting the structural strength of the workpiece molding platform 102 to meet the printing requirement. In some preferred embodiments, when each forming area has a plurality of through holes, the plurality of through holes are uniformly arranged corresponding to the forming area 1023 so as to uniformly weaken the connection between the bottom of the printing workpiece 200 and the forming area, and the uniform arrangement of the through holes corresponding to the forming area can make the vibration energy received by the bottom of the printing workpiece relatively uniform, so that the problem that the printing workpiece is damaged or the printing workpiece cannot be released from the workpiece forming platform due to stress concentration caused by uneven vibration energy received by each part of the bottom of the printing workpiece is avoided. In a specific example, the printed workpiece is a dental model (hereinafter simply referred to as a dental model), so that the dental model can be released from the workpiece forming platform 102, each forming area is provided with at least one through hole corresponding to the front dental area and the rear dental area of the forming area of the corresponding dental model, as shown in fig. 4, and of course, the front dental area and/or the rear dental area can also be provided with a plurality of through holes respectively corresponding to each other, and the plurality of through holes are uniformly arranged in the corresponding front dental area or the rear dental area, and a schematic diagram of forming the corresponding printed workpiece 200 thereon is shown in fig. 5. Preferably, the plurality of through holes are arranged so that the area of the weakened portion of each tooth area occupies at least 1/3-1/2 of the area of each tooth area, so that the structural strength between the printed workpiece 200 and the forming area 1023 is weakened as much as possible when the printed workpiece 200 is formed, the plurality of through holes in each tooth area (front tooth area and rear tooth area) are uniformly distributed in each tooth area, and correspondingly, the through holes in each tooth area are uniformly distributed in the corresponding tooth area, so that vibration energy obtained by each portion of the printed workpiece 200 is uniform, stress concentration is avoided, and the printed workpiece 200 is easily separated from the workpiece forming platform 102 and is not damaged.

In some embodiments, the vibration assembly 111 includes a plurality of directional vibrators 111b that can vibrate in a predetermined direction, and the directional vibrator 111b of this embodiment preferably employs a vertical directional vibrator for generating vibrations in a vertical direction. To enable the printed workpiece 200 formed in the forming area 1023 to be separated from the workpiece forming platform 102, at least one or more vertically oriented vibrators are disposed below each forming area of the workpiece forming platform 102, each vertically oriented vibrator generating a corresponding vibration energy to the bottom of the printed workpiece 200 by vibration in a vertical direction to release the printed workpiece from the workpiece forming platform 102. When a plurality of vertically oriented vibrators are included below the forming area 1023, the plurality of vertically oriented vibrators are uniformly distributed corresponding to the forming area 1023, so that vibration energy for releasing can be uniformly obtained at the bottom of the printed workpiece, stress concentration at a certain position can not occur, and damage to the printed workpiece is caused.

In some embodiments, each directional vibrator 111b may have a mounting base 111a for fixing to the molding bottom 1022 of the workpiece molding platform 102, and in some preferred embodiments, the mounting base 111a extends from a side wall of the body of the directional vibrator 111b and is fixed to the molding bottom 1022 of the workpiece molding platform 102 by a fixing structure such as a bolt or an expansion bolt, as shown in fig. 6, the mounting base 111a may be directly adhered to the molding bottom 1022 by an adhesive manner, and it should be noted that the mounting manner of each directional vibrator is not limited thereto, and it should be understood that any mounting manner capable of firmly mounting the directional vibrator to the molding bottom may be used in the present utility model, and the specific mounting manner of the directional vibrator is not limited thereto.

In other embodiments, each directional vibrator may be mounted below the forming area 1023 by a vibration assembly mounting portion 1024, and in some preferred embodiments, as shown in fig. 7, the vibration assembly mounting portion 1024 includes a fixing groove 1024a and a connecting portion 1024b connected to both ends of the fixing groove 1024a and fixing the directional vibrator 111b to the forming bottom surface 1022 of the workpiece forming table 102 by cooperating with the fixing groove 1024a, wherein the connecting portion 1024b may be fastened to the forming bottom surface 1022 by a bolt or an expansion bolt, and the directional vibrator may generate vibration in the fixing groove 1024a by a vibration driving mechanism, and may contact the forming bottom surface 1022 of the workpiece forming table 102 when vibrating, thereby transferring vibration energy to the bottom of the printed workpiece 200 through the corresponding portion of the workpiece forming table, so as to separate the printed workpiece 200 from the workpiece forming table 102. The directional vibrator 111b may be one of a motor vibrator, an ultrasonic vibrator, a compressed air vibrator, or a magnetic vibrator, and the present utility model is not limited thereto

In other preferred embodiments, as shown in fig. 8, the vibration assembly mounting portion 1024 may be a mounting groove formed by recessing a side of the forming bottom surface 1022 of the workpiece forming platform 102 toward a side of the forming end surface 1021 corresponding to each forming area 1023, each directional vibrator 111b is fixed in each mounting groove, the opening of the mounting groove is provided with a baffle 1026 to encapsulate the directional vibrator in the mounting groove, the baffle 1026 may be fixed to the forming bottom surface 1022 of the workpiece forming platform 102 by a bolt, and in this embodiment, by designing the vibration assembly mounting portion 1024 to have a structure with a recessed forming bottom surface, the thickness of a portion of each directional vibrator corresponding to the workpiece forming platform for transmitting vibration energy is reduced, so that the transmission efficiency of vibration energy is higher, and separation of the printed workpiece and the workpiece forming platform is more convenient.

In other embodiments, the vibration assembly is provided with a vibration rod 113 corresponding to at least one through hole of the forming area 1023 of each printing workpiece, one end of the vibration rod 113 is disposed in the corresponding through hole 1023a, the other end of the vibration rod 113 is connected with a directional vibrator 111b, as shown in fig. 9 and 10, so that vibration energy is transmitted to the forming area 1023 through the vibration rod 113, and thus the printing workpiece which is easy to form in the forming area is released from the workpiece forming platform 102. The other end of each vibrating rod 113 is connected to a directional vibrator 111b, the supporting table 114 is correspondingly provided with a receiving groove 114a for receiving each directional vibrator 111b, each directional vibrator 111b is connected to each vibrating rod 113 after being mounted in the receiving groove 114a, when the printed workpiece 200 is collected, each directional vibrator 111b performs vibration in the vertical direction under the control of the control device, and vibration energy is transferred to the bottom of the printed workpiece 200 formed in the corresponding forming area 1023 through the vibrating rod 113, and energy loss is small in the process of transferring the vibration energy to the bottom of the printed workpiece through the vibrating rod 113, so that the printed workpiece 200 formed in the forming area is easier to release from the workpiece forming platform 102.

Therefore, the utility model can realize the purpose of automatically collecting the printed workpiece by arranging the weakening part which is easy to separate the printed workpiece from the workpiece forming platform in at least the forming area of the workpiece forming platform and arranging the vibration assembly below the workpiece forming platform so as to separate the printed workpiece from the workpiece forming platform by the vibration energy generated by the vibration assembly.

In the embodiments of the present utility model, after the printed workpiece 200 on the workpiece forming platform 102 is released by the vibration assembly 111, the released printed workpiece 200 needs to be automatically collected, so the photocurable three-dimensional printing apparatus 100 of the present embodiment further includes a collecting member 112 and a receiving member 130 for accommodating the collected printed workpiece 200, in order to facilitate the automatic collection of the printed workpiece 200, the receiving member 130 is generally disposed adjacent to the workpiece forming platform 202, and the receiving member 130 may be disposed in any shape according to the requirement, as shown in fig. 1, for example, the receiving member 130 is on the a side of the workpiece forming platform 102, so that the collecting member 112 sends the printed workpiece 200 on the workpiece forming platform 102 to the receiving member 130 for collection.

In some embodiments of the present application, the collecting member 112 includes a collecting baffle 112a for collecting the printed workpiece 200, as shown in fig. 11, where the collecting baffle 112a is used to collect the printed workpiece 200 released by the vibration assembly on the workpiece carrying platform into the receiving member 130, and the collecting baffle 112a may be a straight baffle or an arc baffle, in this embodiment, the collecting baffle 112a is located on a side, away from the receiving member 130, of the workpiece forming platform 102, that is, on the B side in the drawing, during the initial state and the printing and releasing process, and when the releasing process is finished, the collecting baffle 112a is moved by the collecting driving mechanism from a side, away from the receiving member 130, to a side, that is, on the a side, in the drawing, adjacent to the receiving member 130, and during the moving process, the printed workpiece 200 is collected into the receiving member 130, so that the collecting baffle 112a can block the released printed workpiece 200 without the collecting baffle 112a falling onto another side of the workpiece forming platform 102 opposite to the advancing direction thereof, and when the releasing process is finished, the collecting baffle 112a is moved across the other side of the workpiece forming platform 102, that is at least perpendicular to the height of the printing platform 102.

In some embodiments, in order to enable the collection baffle 112a to automatically move along the horizontal direction of the workpiece forming stage 202, the collection baffle 112a needs to be driven by a collection driving mechanism, in some preferred embodiments, the collection driving mechanism includes a guide rail and a driving member, the guide rail is disposed parallel to the horizontal plane of the workpiece forming stage, the driving member is used to drive the collection baffle 112a to move along the guide rail in the horizontal direction of the workpiece forming stage 102, in some examples, the driving member may include a driving motor 230 and a screw 231, the screw 231 is controlled to rotate by the driving motor to enable the collection baffle 112a to linearly move on the corresponding screw, as shown in fig. 12, preferably, in order to enable the collection baffle 112a to stably move on the screw, the driving member further includes a guiding rod 232; in other examples, the driving unit may further include a driving motor and a synchronous belt controlled by the driving motor to move the collecting baffle 112a along the guide rail. The drive motor includes, but is not limited to: a stepping motor and a servo motor.

In other preferred embodiments, as shown in fig. 13, the collection drive mechanism includes a drive rod 234 for moving the collection baffle 112a in a horizontal direction with respect to the workpiece forming platen 102, the drive rod 234 being coupled to the collection baffle 112a, the drive rod 234 being controlled by an electromagnetic structure 233.

In some embodiments, the collecting member 112 further includes a blade to release and collect the unreleased small number of printed workpieces simultaneously with the blade in the collecting process, so that the step of manually interfering with the handling of the unreleased printed workpieces is avoided, which may make the automatic collecting process of the present utility model more efficient, in consideration of the fact that there may be a situation that the unreleased small number of printed workpieces may not be completely released by releasing the printed workpieces with the vibrating assembly. Specifically, the collecting baffle 112a is connected to the blade, and the connection mode may be an integral molding, or may be any one of a fixed connection or a detachable connection.

In some embodiments, as shown in fig. 14, the blade 115 includes a blade edge portion 115a and a blade body portion 115b connected to the blade edge portion 115a, and a side of the blade body portion 115b opposite to the blade edge portion 115a is a blade back portion 115c, and in this embodiment, parameters defining the blade are as follows: the size of the blade along the horizontal movement direction of the workpiece forming platform 102 is the width of the blade, the size of the blade along the direction perpendicular to the horizontal movement direction of the horizontal plane is the length of the blade, and the size of the blade along the direction perpendicular to the horizontal plane of the workpiece forming platform is the thickness of the blade. In some preferred embodiments, the height of the blade increases gradually from the blade edge portion 115a to the blade back portion 115c, such that the blade is sloped in the height direction so that the blade contacts the bottom of the print workpiece 200; in some preferred examples, in order to facilitate the contact of the blade portion 115a with the bottom of the print workpiece 200 to scoop off the print workpiece 200 attached to the workpiece forming stage 102, the height of the blade portion 115a is preferably 0.05mm to 1.0mm, and preferably the height of the blade portion 115a is 0.2mm. To increase the efficiency of releasing the printed workpiece, the bevel is at an acute angle to the workpiece forming platen 102, which in some embodiments is in the range of 5 ° to 45 °, preferably in the range of 10 ° to 30 °, for example, the acute angle may be 10 °, 15 °, 20 °, 25 °, 30 °, etc.

In some preferred embodiments, as shown in fig. 15, the collecting baffle 112a may be connected to the blade edge 115a of the blade to release the bottom of the printed workpiece that does not come off the workpiece forming stage when the blade edge contacts the bottom during the collecting process, so that the collecting baffle 112a can block the released printed workpiece 200 without falling across the collecting baffle 112a on the other side of the workpiece forming stage 102 opposite to the advancing direction thereof, and the total height of the collecting baffle 112a and the blade edge is at least greater than the height of the center of gravity of the printed workpiece 200; of course, the collecting baffle 112a may be connected to the back 115c of the blade, in which case the width of the blade should be less than 1/2 of the minimum width of the printed workpiece in the direction of the horizontal surface of the workpiece forming table, so that when the collecting baffle 112a reaches above the receiving member 130, the printed workpiece does not rest on the blade and does not fall into the printing member.

In other preferred embodiments, in order that the collecting baffle 112a is not in front of the collecting baffle, and the collecting baffle 112a is connected to the back 115c of the blade, and there is enough space between the collecting baffle 112a and the edge of the blade to accommodate the collected printed workpiece, in some specific examples, the collecting baffle 112a is a straight baffle, and the blade should have a sufficient width so that a receiving space is formed between the collecting baffle 112a and the edge of the blade to adequately receive the printed workpiece 200, as shown in fig. 16; in other preferred embodiments, the collecting baffle 112a may be a C-shaped arc plate, and a receiving space enough to receive the released printed workpiece 200 may be formed between the C-shaped arc plate and the back of the blade, or the C-shaped arc plate and the body of the blade may form a receiving space enough to receive the released printed workpiece 200, as shown in fig. 17; taking the collecting baffle 112a as a C-shaped arc plate as an example, referring to fig. 17-19, in an initial state and in a printing process, the blade and the collecting baffle 112a connected to the blade are located at a side of the workpiece forming platform, which is far away from the receiving part 130, that is, a side B in the drawing, and when printing is completed, the control device controls the vibration driving mechanism to vibrate the vibration assembly so as to complete release by transmitting vibration energy generated by the vibration to the bottom of the printing workpiece; then, the collecting shutter 112a is controlled to move in the horizontal direction of the workpiece forming stage 102 to a side adjacent to the receiving part 130, i.e., the a side, to collect the released printed workpiece, and the unreleased printed workpiece is further released by the blade during the collection, in this embodiment, the height of the collecting shutter 112a in the direction perpendicular to the horizontal plane of the workpiece forming stage 102 is at least greater than the height of the center of gravity of the printed workpiece in order to allow the collecting shutter 112a to block the collected released printed workpiece 200. Of course, in order to enable the printed workpiece when reaching the receiving part 130 side to automatically fall into the receiving part 130, at this time, the rotary driving mechanism connected to the blade is used to rotate the blade from a position parallel to the horizontal plane of the workpiece forming platform 102 to a preset angle with the horizontal plane of the workpiece forming platform, the blade edge portion 115a is inclined downward toward the receiving part 130, so that the printed workpiece 200 in the receiving space on the blade body portion 115b falls into the receiving part 130 under the action of gravity, and as shown in fig. 19, after all the printed workpiece in the receiving space falls into the receiving part 130, the rotary driving mechanism is used to rotate the blade to be parallel to the horizontal plane of the workpiece forming platform, and the collecting baffle 112a is moved along the horizontal direction of the workpiece forming platform 102 to a side far from the receiving part 130 to wait for the next workpiece collection.

Therefore, in the embodiment, the collecting baffle is connected with the blade, so that the printing workpiece which is not completely released can be further released and collected by the blade in the process of collecting by using the collecting baffle after vibration release, and the automatic collecting efficiency of the printing workpiece is greatly improved.

In order to achieve the automatic printing purpose of the present utility model, in some embodiments, the photo-curing three-dimensional printing apparatus further includes an automatic typesetting system, configured to receive a plurality of three-dimensional models, typeset the plurality of three-dimensional models, and output the typeset three-dimensional models to the printing device, so that the printing device prints the typeset three-dimensional models. The automatic typesetting system can be a module in a control system of the photo-curing three-dimensional printing device, or can be a unit which is arranged independently, and the utility model is not limited to the module.

In one embodiment, the automatic typesetting system may be implemented by existing computer software, such as MakerBot Print software from MakerBot, 3dMagics software from Zhongrui technologies. For software implementation, the automatic composition system 210 may be implemented by separate software modules, such as program modules (procedures) and function modules (functions), each of which performs the functions and operations of one or more automatic composition systems. The software codes may be implemented by application software written in a suitable programming language and may be stored in memory for execution by a controller or processor.

It will be appreciated that the automatic typesetting system may also be implemented in hardware or a combination of computer software and hardware. For a hardware implementation, the automatic layout system 210 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital signal processing devices (DAPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, other electronic devices for implementing the functions of the automatic layout system 210, or a selected combination thereof.

In other embodiments, the light curable three dimensional printing apparatus further includes an automatic fluid replenishment device to replenish the container with light curable material as needed.

As shown in fig. 20, the automatic fluid infusion device has a fluid infusion tank 215 and an electric valve 216. The liquid replenishment tank 215 is for containing a photo-setting material, and is disposed above the container 101. The bottom surface of the fluid infusion tank 215 is provided with a liquid outlet and is connected with an electric valve 216. Of course, the liquid outlet can also be arranged at the bottom of the side surface of the liquid supplementing box 215. When the electric valve 216 is opened, the photo-setting material in the liquid replenishing tank 215 can flow into the container 101 under the action of gravity, thereby achieving the purpose of replenishing the container 101 with liquid. In addition, the top surface of the fluid infusion tank 215 may be further provided with a fluid inlet for supplementing the fluid infusion tank 215 with the photosensitive resin. It will be appreciated that the automatic fluid refill apparatus may operate normally when the fluid level in the fluid refill tank 215 is higher than the fluid level in the container 101.

The automatic fluid infusion device may also have a protection valve. A protection valve is provided between the liquid outlet and the electric valve 216 for closing the passage between the liquid outlet and the electric valve. Thus, the maintenance can be convenient without emptying the fluid infusion tank. It will be appreciated that the protection valve is normally open when the automatic fluid infusion device is operating properly.

In order to realize automatic fluid infusion, the automatic fluid infusion device can also comprise a liquid level detection device. The liquid level detection device is used for detecting the liquid level in the container so as to control the opening and closing of the electric valve 216 according to the detection result, and control the liquid supplementing time and the liquid supplementing amount. In this embodiment, the liquid level detecting device may be one or more liquid level detecting devices, and in a preferred embodiment, the liquid level detecting device may be one or more of an ultrasonic liquid level detector, an optical liquid level detector, a capacitive liquid level detector, and the like.

As shown in fig. 21, the present utility model also provides a photo-curing three-dimensional printing system, wherein the photo-curing three-dimensional printing system 10 comprises a host computer 400 and a plurality of photo-curing three-dimensional printing devices 100-1 to 100-k connected with the host computer 400. The upper computer 400 is used for controlling the photo-curing type three-dimensional printing devices 100-1 to 100-k to print the three-dimensional model, specifically, when the upper computer 400 receives a print job, the state of the photo-curing type three-dimensional printing devices 100-1 to 100-k is queried, and if the free three-dimensional printing device 200 exists, the upper computer 400 sends the three-dimensional model of the current job to one or more photo-curing type three-dimensional printing devices 100 in the free state to print. After receiving the three-dimensional model, the photo-curing three-dimensional printing device 100 automatically prints the three-dimensional model by using the workpiece printing device, automatically releases the printed 3D printing components by using the workpiece collecting device and automatically collects the components to the component containing device, and can automatically typeset and automatically supplement liquid when needed.

The photo-curing type three-dimensional printing apparatuses 100-1 to 100-k may automatically report the current status thereof to the host computer 400, and the host computer 400 stores the status reported by the photo-curing type three-dimensional printing apparatuses 100-1 to 100-k. The state of the host computer 400 for inquiring the photo-curing type three-dimensional printing apparatuses 100-1 to 100-k is inquired in the local area of the host computer 400. It is understood that the host computer 400 may query the state of the photo-curing type three-dimensional printing apparatuses 100-1 to 100-k directly to the photo-curing type three-dimensional printing apparatuses 100-1 to 100-k. The states of the photo-curable three-dimensional printing devices 100-1 to 100-k include, but are not limited to, idle, in-print, and error.

In some embodiments, the photocurable three-dimensional printing system may further include a server 500. The server 500 is used for receiving and processing the print job of the remote user, and transmitting the print job of the remote user to the upper computer 400 when the upper computer 400 is connected to the server 500 through a network to acquire the print job. The network of the upper computer 400 connected to the server 500 includes, but is not limited to, ADSL network, LAN network, WLAN network, and WAN network.

It should be noted that, under the condition of no contradiction, the above examples can be freely combined according to needs to form different new embodiments, and the embodiments formed by the combination are all within the protection scope of the present utility model, and are not described herein in detail for the sake of saving the text of the application.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Likewise, the foregoing is merely specific embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (20)

1. A photo-curable three-dimensional printing apparatus, comprising:

a workpiece printing apparatus comprising:

a container for Cheng Fangguang sensitive resin;

the lifting platform comprises a workpiece forming platform and a lifting driving mechanism, the lifting driving mechanism drives the workpiece forming platform to move up and down relative to the container, the workpiece forming platform is used for bearing printing workpieces, and at least a forming area of each printing workpiece is provided with a weakening part which enables the printing workpiece formed in the forming area to be easily separated from the forming area;

An image exposure system positioned above the container to project a preset beam of light toward the workpiece forming stage to form the printed workpiece on the surface of the workpiece forming stage;

and

A workpiece collection device comprising:

a vibration assembly for generating, by vibration, at least vibrational energy capable of releasing the printed workpiece from the workpiece forming platen to a bottom of the printed workpiece below the workpiece forming platen to separate the printed workpiece from the workpiece forming platen;

and the collecting piece is used for collecting the printed workpiece separated from the workpiece forming platform and sending the printed workpiece to a receiving part.

2. The light-curable three-dimensional printing apparatus according to claim 1, wherein the weakened portions are provided at least in each molding region so that contact surfaces of the bottom of the printing workpiece with the molding region are reduced when the printing workpiece is molded in the molding region, to reduce structural strength of connection of the bottom of the printing workpiece with the workpiece molding stage, so that the printing workpiece is easily separated from the molding region.

3. The light-curable three-dimensional printing apparatus according to claim 2, wherein the weakened portions comprise one or more weakened structures, and when the weakened portions comprise a plurality of weakened structures, the plurality of weakened structures are uniformly distributed in the molding region.

4. A photo-curing type three-dimensional printing apparatus according to claim 3, wherein the weakened area of the weakened portion occupies 1/3 to 1/2 of the area of the molding area.

5. The light-curable three-dimensional printing apparatus of claim 4, wherein when the printed workpiece is a dental model, the plurality of weakened structures are uniformly distributed in the anterior and/or posterior regions of the molding zone.

6. The light-curable three-dimensional printing apparatus according to any one of claims 1 to 5, wherein the weakened portions include one or more through holes provided in each of the molding areas along a direction perpendicular to the bottom of the printed workpiece through the workpiece molding stage.

7. The light curable three dimensional printing apparatus of claim 6, wherein the vibration assembly includes a plurality of directional vibrators, at least one or more of the directional vibrators being disposed below each of the forming areas, each directional vibrator generating vibration energy to the bottom of the printed workpiece by vibration to release the printed workpiece from the workpiece forming platform.

8. The light-curable three-dimensional printing apparatus according to claim 7, wherein the vibration assembly further comprises a vibration rod provided corresponding to at least one through hole of each molding area, one end of the vibration rod is disposed in the through hole, the other end of the vibration rod is connected with the directional vibrator, the vibration rod is contacted with the bottom of the printing workpiece under the vibration action of the directional vibrator, and vibration energy generated by the directional vibrator is transmitted to the printing workpiece, so that the printing workpiece is released from the workpiece molding platform.

9. The light-curable three-dimensional printing device according to claim 8, wherein the vibration assembly further comprises a supporting platform arranged below the workpiece forming platform, the supporting platform is provided with accommodating grooves for accommodating the vibrators corresponding to the vibrating rods, and each directional vibrator is connected with each vibrating rod after being mounted in the accommodating groove.

10. The light-curable three-dimensional printing apparatus according to claim 6, wherein: the collecting piece comprises a collecting scraper which spans across two sides of the workpiece forming platform so as to horizontally move along a horizontal plane between the side, far away from the receiving part, of the workpiece forming platform and the side, close to the receiving part, of the workpiece forming platform, and the released printing workpiece is collected to the receiving part.

11. The light-curable three-dimensional printing apparatus according to claim 10, characterized in that: the collecting member further includes a blade connected to the collecting blade for releasing the unreleased receiving member while collecting the print workpiece.

12. The light-curable three-dimensional printing apparatus according to claim 11, wherein: the blade comprises a blade part and a blade body part connected with the blade part, wherein one side of the blade body part opposite to the blade part is a blade back part, the thickness of the blade part is 0.05-1.0 mm, and the blade gradually thickens from the blade part to the blade back part so that the blade is contacted with the bottom of an unreleased printing workpiece to be released.

13. The light-curable three-dimensional printing apparatus according to claim 12, characterized in that: the collection scraper is connected to the knife back.

14. The light-curable three-dimensional printing apparatus according to claim 13, wherein: the overall height of the collection scraper and the back of the blade is at least greater than the center of gravity of the printed workpiece.

15. The light-curable three-dimensional printing apparatus according to claim 12, characterized in that: the collecting scraper is connected to the blade portion.

16. The light-curable three-dimensional printing apparatus according to claim 10, wherein the collecting blade is a straight shutter or an arc shutter.

17. The photocurable three-dimensional printing apparatus according to claim 6, further comprising an automatic typesetting system for receiving a plurality of three-dimensional models, typesetting the plurality of three-dimensional models, and outputting the typeset three-dimensional models to the printing device so that the printing device prints the typeset three-dimensional models.

18. The light-curable three-dimensional printing apparatus according to claim 6, further comprising an automatic liquid replenishing device to replenish the photosensitive resin to the container as needed.

19. The light-curable three-dimensional printing apparatus according to claim 18, wherein the automatic liquid replenishing device comprises:

the liquid supplementing box is arranged above the container and is used for accommodating photosensitive resin;

an electric valve connected to the bottom of the bottom and/or the side of the fluid-replenishing tank;

when the container needs to be replenished with liquid, the electric valve is opened, so that the photosensitive resin in the replenishing liquid box flows into the container.

20. A photo-curing three-dimensional printing system comprising a host computer and a plurality of photo-curing three-dimensional printing apparatuses according to any one of claims 1 to 19;

the upper computer is used for inquiring the state of each photo-curing type three-dimensional printing device when receiving a printing task, and if the photo-curing type three-dimensional printing device is idle, the upper computer sends a three-dimensional model corresponding to the current task to one or more photo-curing type three-dimensional printing devices in the idle state for printing;

the light-curing type three-dimensional printing equipment is used for automatically printing the three-dimensional model by utilizing the printing device after receiving the three-dimensional model, automatically releasing the printed printing workpiece by utilizing the workpiece collecting device and automatically collecting the printed printing workpiece to the receiving component.