Material tray for 3D printing and 3D printing equipment

Abstract

The utility model relates to a tray for 3D printing and 3D printing equipment. The tray for 3D printing comprises a tray frame; the first membrane assembly is configured to be in sealed connection with the bottom of the tray frame; the second membrane component is positioned on one side of the first membrane component, and a gap is formed between the second membrane component and the first membrane component; and the film stretching assembly is configured to be connected with the first film assembly and the second film assembly so as to tension the first film assembly and the second film assembly. According to the tray for 3D printing, the cavity used for containing the liquid printing material is defined by the tray frame and the first film assembly; a gap is formed between the first membrane component and the second membrane component; when the first membrane assembly is punctured or torn, the gap can prevent the second membrane assembly from being punctured, the second membrane assembly below the first membrane assembly can receive leaked liquid, and liquid printing resin is prevented from further leaking into the printer to cause pollution and damage to 3D printing equipment.

Description

Technical Field

[0001] The present application relates to the technical field of photocuring 3D printing, and particularly relates to a 3D printing material tray and a 3D printing device. Background Art

[0002] In the photocuring 3D printing technology, a light source is used to irradiate the liquid photosensitive resin inside the material tray to cure and form it on the forming platform, so as to cure and form the photosensitive material layer by layer to form a three-dimensional object.

[0003] In the prior art, in order to reduce the peeling force between the printed part and the bottom of the material tray, a film-stretched material tray is often used to hold the liquid photosensitive resin. The flexible release film at the bottom of the film-stretched material tray can reduce the peeling force during the peeling of the printed part. However, the release film is a flexible structure and is in a suspended state during the printing process, and it is easy to be punctured or torn. After the release film is damaged, the printing resin inside the material tray will leak, which will contaminate and damage the 3D printer. Utility Model Content

[0004] The present application provides a 3D printing material tray and a 3D printing device to solve the technical problem that the film-stretched material tray in the prior art is prone to cause printing resin leakage after the release film is damaged, thereby contaminating and damaging the 3D printer.

[0005] In a first aspect, the present application provides a 3D printing material tray, including:

[0006] A material tray frame;

[0007] A first film assembly configured to be hermetically connected to the bottom of the material tray frame;

[0008] A second film assembly. The second film assembly is located on one side of the first film assembly and is configured to form a gap with the second film assembly.

[0009] A film-stretching assembly configured to be connected to the first film assembly and the second film assembly to tension the first film assembly and the second film assembly.

[0010] Optionally, the film-stretching assembly includes an upper film-stretching frame and a lower film-stretching frame. A first connecting portion is provided along the circumference of the upper film-stretching frame, and a second connecting portion is provided along the circumference of the lower film-stretching frame. The first connecting portion and the second connecting portion are snap-connected;

[0011] The circumferential edges of the first film assembly and the circumferential edges of the second film assembly are embedded between the first connecting portion and the second connecting portion.

[0012] Optionally, the first connecting portion and the second connecting portion are in a concave-convex fit; positioning posts are provided on the first connecting portion and / or the second connecting portion; positioning holes matching the positioning posts are provided on the circumferential edges of the first film assembly and the circumferential edges of the second film assembly.

[0013] Optionally, the film stretching assembly is embedded in the bottom of the tray frame.

[0014] Optionally, the upper surface and / or the lower surface of the second membrane assembly is provided with a microstructure, and the microstructure includes surface texture, micropores, fiber structure or nanoparticles.

[0015] Optionally, a flexible substrate layer is provided at the bottom of the first membrane assembly and / or the second membrane assembly, and a microstructure is provided on the flexible substrate layer.

[0016] Optionally, the 3D printing material tray further includes an isolating member, which is disposed circumferentially along the gap, and the isolating member abuts between the first membrane assembly and the second membrane assembly to form a gap between the first membrane assembly and the second membrane assembly.

[0017] Optionally, the second membrane assembly is provided with a flow hole communicating with the gap.

[0018] Optionally, a plurality of flow holes are sequentially arranged on the second membrane assembly along the circumferential direction of the gap, and avoidance portions corresponding to the flow holes are provided on the isolation member.

[0019] Optionally, the 3D printing material tray also includes a light-transmitting support member disposed below the second membrane assembly.

[0020] In a second aspect, the present application provides a 3D printing device, including the 3D printing material tray provided in the first aspect of the present application.

[0021] Optionally, the 3D printing device further includes a tray bottom plate, a tray frame is connected to the tray bottom plate, and the film stretching assembly is clamped between the tray frame and the tray bottom plate.

[0022] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0023] The 3D printing material tray provided in the embodiment of the present application, the first film component is sealed and connected to the bottom opening of the material tray frame, and a cavity for holding liquid printing material is formed by enclosing the material tray frame and the first film component. The second film component is located below the first film component, and the first film component and the second film component are both made of light-transmitting materials, and a gap is formed between the first film component and the second film component, which can avoid blocking the light emitted by the optical machine at the bottom of the material tray. At the same time, since the gap is filled with a gas medium or a liquid medium, vacuum adsorption between the first film component and the second film component can be avoided through the gap, so that there is always a uniform gap between the first film component and the second film component. When the first film component is punctured by the print or other object above it, since there is a gap between the first film component and the second film component, the second film component can be avoided from being punctured. When the first film component leaks due to puncture or tearing, the second film component below the first film component can receive the leaked liquid to prevent the liquid printing resin from further leaking into the interior of the printer, causing pollution and damage to the 3D printing equipment. Brief Description of the Drawings

[0024] The drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the figures do not constitute a scale limitation.

[0027] Figure 1 An exploded view of a 3D printing material tray provided for an embodiment of the present application;

[0028] Figure 2 A partial structure exploded view of a 3D printing material tray provided for an embodiment of the present application;

[0029] Figure 3 A partial cross-sectional view of a second film assembly provided for an embodiment of the present application;

[0030] Figure 4 Provided for an embodiment of the present application Figure 2 An enlarged detail view of part A;

[0031] Figure 5 Provided for an embodiment of the present application Figure 2 An enlarged detail view of part B;

[0032] Figure 6 A side view of a 3D printing material tray provided for an embodiment of the present application;

[0033] Figure 7 Provided for an embodiment of the present application along Figure 6 A cross-sectional view taken along C-C;

[0034] Figure 8 Provided for an embodiment of the present application Figure 7 An enlarged detail view of part D;

[0035] Figure 9 Provided for an embodiment of the present application Figure 8 An enlarged partial detail view.

[0036] Description of the Reference Numerals:

[0037] 1. Tray frame

[0038] 2. First membrane module; 21. Membrane module body; 22. First positioning hole; 23. First connection hole

[0039] 3. Second membrane module; 31. Release film layer; 32. Flexible substrate layer; 33. Flow-through hole; 34. Second positioning hole; 35. Second connection hole

[0040] 4. Gap

[0041] 5. Spacer; 51. Lifting layer; 511. Washer body; 512. First avoidance part; 52. Adhesive layer; 521. Tape body; 522. Second avoidance part

[0042] 6. Film tensioning module; 61. Upper film tensioning frame; 611. First connection part; 612. Positioning post; 613. Third connection hole; 62. Lower film tensioning frame; 621. Second connection part

[0043] 7. Translucent support

[0044] 8. Tray bottom plate; 81. Bottom plate body; 82. Input hole; 83. Pipeline joint; 84. Output hole; 85. Air nozzle Detailed implementation mode

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0046] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0047] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of an element or feature as shown in the figure relative to another element or feature, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications will also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations.

[0048] In order to solve the technical problem in the prior art that the stretch film material tray is prone to leakage of printing resin after the release film is damaged, thereby contaminating and damaging the 3D printer, the present application provides a 3D printing material tray, wherein a double-layer membrane component is provided under the material tray frame 1. When the first membrane component 2 is punctured, the leakage can be received by the second membrane component 3, thereby preventing the liquid printing resin inside the stretch film material tray from causing pollution and damage to the inside of the printing device.

[0049] See also Figures 1 to 9 In a first aspect, the present application provides a 3D printing material tray, comprising a material tray frame 1, a first membrane component 2 and a second membrane component 3 arranged in sequence from top to bottom, such as Figure 1 , Figure 7 , Figure 8 and Figure 9 shown.

[0050] Among them, the tray frame 1 is a frame with a certain depth, and has openings at both ends. The top opening of the tray frame 1 is convenient for the bottom of the molding platform and the printed part to extend into. The first membrane component 2 is sealed and connected to the bottom opening of the tray frame 1, and a cavity for holding liquid printing materials is formed by enclosing the tray frame 1 and the first membrane component 2. The second membrane component 3 is located below the first membrane component 2. The first membrane component 2 and the second membrane component 3 are both made of light-transmitting materials, and a gap 4 is formed between the first membrane component 2 and the second membrane component 3 to avoid blocking the light emitted by the optical machine at the bottom of the 3D printing tray. At the same time, since the gap 4 is filled with a gas medium or a liquid medium, a uniform gap can always exist between the first membrane component 2 and the second membrane component 3, and the gap 4 can avoid vacuum adsorption between the first membrane component 2 and the second membrane component 3.

[0051] When the first membrane component 2 is punctured or torn by the printed part or other objects above it, the second membrane component 3 can be prevented from being punctured due to the gap between the first membrane component 2 and the second membrane component 3. When the first membrane component 2 leaks due to damage, the second membrane component 3 below the first membrane component 2 can receive the leaked liquid to prevent the liquid printing resin from further leaking into the interior of the printer and causing pollution and damage to the 3D printing equipment.

[0052] It should be noted that the first membrane component 2 and the second membrane component 3 can adopt the stretching structure in the prior art to achieve tightening and sealing, so that the 3D printing material tray in this application becomes a double-layer stretching material tray. When the upper first membrane component 2 is damaged, the leakage can be received by the lower second membrane component 3, thereby realizing the leakage-proof function of the double-layer stretching material tray.

[0053] It should be noted that the structures of the first membrane component 2 and the second membrane component 3 can be the same or different. Any one of the first membrane component 2 and the second membrane component 3 can include a single-layer membrane structure or a multi-layer stacked membrane structure. The material of each layer of the membrane structure can be polytetrafluoroethylene (PTFE), nFEP film, polyethylene (PE), polyvinylidene fluoride (PVDF), fluorinated ethylene propylene (FEP), perfluoroalkoxy resin (PFA), polytrifluorochloroethylene (PCTFE), ethylene-tetrafluoroethylene copolymer (ETFE), polyvinyl fluoride (PVF), polyethylene terephthalate (PET), polybutadiene formal (PBT), thermoplastic polyurethane (TPU), polyamide, nylon The invention can be one of polyurethane foam (PA), polyimide (PI), polypropylene (PP), polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), polystyrene (PS), polybutylene (PB), polyoxymethylene (POM), polycarbonate (PC), polysulfone (PSU), polyphenylene oxide (PPO), polyvinyl alcohol (PVA), polyacrylonitrile styrene (AS), polyacrylonitrile butadiene styrene (ABS), and fluororesin (FR). It can also be two or more polymers of the above substances, or a blended polymer, block polymer, or network polymer formed by polymerization of the monomers of the above substances, or other fluoride products or other non-stick materials, with a thickness in the range of 0.01-10 mm. When the first membrane component 2 or the second membrane component 3 includes a multilayer membrane structure, the membrane structure material of each layer can be the same or different.

[0054] It should be noted that when the fluid filled in the gap 4 is a gas, the gas can be air, oxygen, nitrogen, etc. When the fluid filled in the gap 4 is a liquid, the liquid can be an oxygen-carrying liquid. By flowing the fluid in the gap 4, vacuum adsorption between the first membrane assembly 2 and the second membrane assembly 3 can be avoided, thereby reducing the influence of the peeling force of the second membrane assembly 3 on the first membrane assembly 2 and the printed part. To avoid the influence of the leakage of the liquid in the gap 4 on the printer, it is preferred to fill the gap 4 with a gas. The first membrane assembly 2 and the second membrane assembly 3 can be breathable, especially for oxygen-rich gases or oxygen-rich liquids. On the one hand, it can prevent the generation of vacuum between the printing layer and the bottom of the material tank, resulting in difficult demolding. During printing, the gas can enter the bottom of the material tank through the through-hole 33, then through the second membrane assembly 3 and the first membrane assembly 2 to avoid the generation of vacuum. On the other hand, the oxygen in the oxygen-rich gas or oxygen-rich liquid can prevent the resin from curing with ultraviolet light. By controlling the amount of oxygen passing through the first membrane assembly 2, a very thin uncured liquid layer can be formed between the bottom of the material tank and the printing layer, further preventing the printing layer from sticking to the bottom of the material tank and being more conducive to demolding.

[0055] In some embodiments of the present application, please refer to Figure 3 , the upper surface and / or the lower surface of the second membrane assembly 3 is provided with microstructures, and the microstructures include surface textures, micropores, fiber structures or nanoparticles, which can form a rough structure on the upper surface and / or the lower surface of the second membrane assembly 3, avoiding the formation of vacuum adsorption between the first membrane assembly 2 and the second membrane assembly 3, or avoiding the formation of vacuum adsorption between the second membrane assembly 3 and the light-transmitting support 7 below it, and can avoid the influence of the second membrane assembly 3 on the peeling of the first membrane assembly 2 from the bottom of the printed part, thereby reducing the peeling force generated during the peeling process of the printed part.

[0056] In some embodiments of the present application, the microstructures are characteristic structures with a size of 10 nm - 20 μm. Specifically, the surface textures can be recesses or protrusions arranged in an array or uniformly, or can be wavy or serrated texture structures; the micropores can be small-sized blind holes provided on the membrane assembly; the fiber structure is a scattering structure deposited in the membrane structure; the nanoparticles are raised particles formed on the surface of the membrane assembly, and their size is at the nanometer level.

[0057] The above-mentioned microstructures can change the light transmission angle. When the light emitted by the bottom light machine passes through the second film component 3 and the first film component 2 in sequence, the microstructures on the second film component 3 can scatter the light, enhancing the light intensity in the edge region of the projected pixels, weakening the light intensity in the middle region of the pixels, and blurring the boundaries between pixels, thereby reducing the protrusions and depressions on the surface of the printed three-dimensional object and improving the transparency of the printed three-dimensional object. Since the protrusions and depressions on the surface of the three-dimensional object are reduced, the surface of the printed three-dimensional object is smooth, and there is no need to perform secondary polishing on the surface of the printed part after printing.

[0058] In some embodiments of the present application, referring to Figure 3 , a flexible substrate layer 32 is provided at the bottom of the first film component 2 and / or the second film component 3, which can be used to enhance the structural strength of the first film component 2 and / or the second film component 3 and reduce the possibility of damage to the first film component 2 and the second film component 3. The flexible substrate layer 32 is provided with microstructures, which can form rough structures on the lower surface of the first film component 2 and / or the second film component, avoiding adverse effects on the edge seal between the first film component 2 and the material tray frame 1 when forming rough structures on the upper surface of the first film component 2, and avoiding adverse effects on the peeling of the printed part when forming rough structures on the upper surface of the first film component 2. When the flexible substrate layer 32 is provided on the lower surface of the second film component 3, since there is a gap 4 between the first film component 2 and the second film component 3, a uniform gap can be formed between the first film component 2 and the second film component 3, and the possibility of vacuum adsorption between the first film component 2 and the second film component 3 is relatively low. When the flexible substrate layer 32 and the microstructures are provided on the lower surface of the second film component 3, vacuum adsorption between the bottom of the second film component 3 and the light-transmitting support can be avoided.

[0059] In some embodiments of the present application, both the first film component 2 and the second film component 3 are provided with a release film layer 31, and the flexible substrate layer 32 of the second film component 3 is laminated below the release film layer 31. As Figure 3 shown, the materials of the release film layer 31 and the flexible substrate layer 32 can be selected from the film structure materials exemplified above.

[0060] In some embodiments of the present application, referring to Figure 2 , Figure 6 , Figure 7 , Figure 8 and Figure 9 , the 3D printing material tray further includes a spacer 5. The spacer 5 is arranged along the circumferential direction of the gap 4, and the spacer 5 abuts between the first film component 2 and the second film component 3 to prevent the lower surface of the first film component 2 from directly contacting the upper surface of the second film component 3, so as to form a gap 4 between the first film component 2 and the second film component 3. The thickness of the gap 4 is the same as the thickness of the spacer 5. As Figure 9as shown

[0061] In some embodiments of the present application, the thickness of the gap 4 is 0 - 10 mm, which can reduce the height dimension of the 3D printing material tray and make the structure of the 3D printing material tray compact. Preferably, the thickness of the gap 4 is 0.01 - 1 mm. While ensuring there is a gap between the first membrane assembly 2 and the second membrane assembly 3, the thickness of the spacer 5 can be reduced, thereby reducing the amount of the spacer 5 used.

[0062] It should be noted that the spacer 5 can be an annular structure arranged along the circumferential direction of the gap 4, or multiple strip-shaped structures distributed in a ring shape, both of which can achieve the purpose of the present application. The spacer 5 can be arranged at the entire circumference, four sides or four corners of the gap 4, and can form a gap 4 with a uniform gap (i.e., uniform thickness) between the first membrane assembly 2 and the second membrane assembly 3.

[0063] In some embodiments of the present application, the material of the spacer 5 can be any one or a laminated combination of tape, plastic plate, metal gasket, foam, wooden thin plate, fiber cloth, etc.

[0064] As a specific embodiment of the present application, please refer to Figure 2 and Figure 9 , the spacer 5 includes a spacer layer 51 and an adhesive layer 52 laminated from top to bottom. The material of the spacer layer 51 can be a laminated combination of one or more of plastic plate, metal gasket, foam, wooden thin plate or fiber cloth. And both the spacer layer 51 and the adhesive layer 52 are rectangular annular structures, which can seal the circumferential edge of the gap 4.

[0065] In some embodiments of the present application, please refer to Figure 2 and Figure 4 , the second membrane assembly 3 is provided with a through hole 33 communicating with the gap 4, which can realize the input or discharge of the fluid in the gap 4, keep the gap between the first membrane assembly 2 and the second membrane assembly 3 stable, and avoid vacuum adsorption between the two.

[0066] In some embodiments of the present application, it is preferably to set the through hole 33 in the edge area of the gap 4 to avoid adverse effects of the through hole 33 on the light transmission in the middle of the second membrane assembly 3 and the gap 4. Specifically, a plurality of through holes 33 are sequentially arranged on the second membrane assembly 3 along the circumferential direction of the gap 4, and the spacer 5 is provided with an avoidance portion corresponding to the through hole 33, as Figure 2 and Figure 4 shown, so that the fluid sequentially enters the inside of the gap 4 through the through hole 33 and the avoidance portion, or sequentially discharges from the gap 4 through the avoidance portion and the through hole 33.

[0067] As a specific embodiment of the present application, four flow holes 33 are provided on the second membrane assembly 3, four first avoidance portions 512 are formed on the gasket body 511 of the cushion layer 51, four second avoidance portions 522 are formed on the tape body 521 of the adhesive layer 52, and the plurality of flow holes 33 and the plurality of avoidance portions are arranged in one-to-one correspondence, as Figure 2 and Figure 4 shown.

[0068] In some embodiments of the present application, please refer to Figure 1 、 Figure 2 、 Figure 7 and Figure 8 ,the 3D printing material tray further includes a film tensioning assembly 6, and both the first membrane assembly 2 and the second membrane assembly 3 are connected to the film tensioning assembly 6, so as to synchronously tension the first membrane assembly 2 and the second membrane assembly 3. Specifically, the film tensioning assembly 6 is a frame structure, and the circumferential edges of the first membrane assembly 2 and the second membrane assembly 3 are both circumferentially connected to the frame structure, so as to fix the first membrane assembly 2 and the second membrane assembly 3.

[0069] In some embodiments of the present application, please refer to Figure 1 、 Figure 2 、 Figure 7 and Figure 8 ,the film tensioning assembly 6 includes an upper film tensioning frame 61 and a lower film tensioning frame 62. A first connecting portion 611 is provided along the circumference of the upper film tensioning frame 61, and a second connecting portion 621 is provided along the circumference of the lower film tensioning frame 62. The first connecting portion 611 is snap-connected to the second connecting portion 621; it is convenient to quickly disassemble and assemble between the upper film tensioning frame 61 and the lower film tensioning frame 62, so as to facilitate the assembly of the film tensioning assembly 6, the first membrane assembly 2 and the second membrane assembly 3.

[0070] The circumferential edges of the first membrane assembly 2 and the second membrane assembly 3 are embedded between the first connecting portion 611 and the second connecting portion 621, which can press and fix the circumferential edges of the first membrane assembly 2 and the second membrane assembly 3, and avoid the situation that the circumferential sealing edges of the first membrane assembly 2 and the second membrane assembly 3 are loose.

[0071] In some embodiments of the present application, please refer to Figure 2 、 Figure 5 and Figure 8, the first connecting portion 611 and the second connecting portion 621 are in concave-convex fit, which can realize the clamping of the circumferential edge of the first membrane module 2 and the circumferential edge of the second membrane module 3. The first connecting portion 611 and / or the second connecting portion 621 are provided with positioning posts 612; the circumferential edges of the first membrane module 2 and the second membrane module 3 are both provided with positioning holes matching the positioning posts 612. The assembly positioning between the tensioning membrane assembly 6, the first membrane module 2 and the second membrane module 3 can be realized through the cooperation of the positioning posts 612 and the positioning holes, avoiding the deviation of the circumferential edge of the first membrane module 2 and / or the circumferential edge of the second membrane module 3 due to pulling during the process of pressing the membrane assembly, so as to prevent the membrane assembly from appearing in a locally loose state.

[0072] As a specific embodiment of the present application, please refer to Figure 2 and Figure 5 , the membrane module body 21 of the first membrane module 2 is provided with a first positioning hole 22, the second membrane module 3 is provided with a second positioning hole 34, and the first connecting portion 611 is provided with a positioning post 612. When the positioning post 612 passes through the first positioning hole 22 and the second positioning hole 34 in sequence, the positioning between the upper tensioning membrane frame 61, the first membrane module 2 and the second membrane module 3 can be realized. The first connecting portion 611 is a ring-shaped flange, and the second connecting portion 621 is a ring-shaped groove. The fixed connection between the tensioning membrane assembly 6 and the double-layer membrane module can be realized through the engagement of the ring-shaped flange and the ring-shaped groove.

[0073] In some embodiments of the present application, please refer to Figure 8 , the tensioning membrane assembly 6 is embedded in the bottom of the material tray frame 1, which can realize the fixed setting of the tensioning membrane assembly 6 in the 3D printing material tray. At the same time, the first membrane module 2 and the second membrane module 3 can be further abutted by the inner groove wall at the bottom of the material tray frame 1 to further tension the first membrane module 2 and the second membrane module 3.

[0074] In some embodiments of the present application, the tensioning membrane assembly 6 can be fixedly arranged on the material tray frame 1 by screws. At this time, both the tensioning membrane assembly 6 and the double-layer membrane module are provided with connection holes (i.e., the first connection hole 23, the second connection hole 35 and the third connection hole 613) matching the screws, as Figure 1 , Figure 2 , Figure 4 and Figure 5 shown, so as to facilitate the screws to pass through and realize the installation.

[0075] In some embodiments of the present application, please refer to Figure 1 , Figure 7 , Figure 8 and Figure 9The 3D printing material tray also includes a light-transmitting support member 7 disposed below the second film assembly 3, which can support the first film assembly 2 and the second film assembly 3 during the printing process and provide a flat support surface for the printing material, thereby improving the flatness of the solidified layer.

[0076] The light-transmitting support member 7 may be a rigid structure or a flexible structure, such as glass, a screen, etc. As a specific embodiment of the present application, the light-transmitting support member 7 is made of glass.

[0077] The second aspect of the embodiment of the present application provides a 3D printing device, including the 3D printing material tray in the above embodiment. Since the above 3D printing material tray has the functions of preventing liquid leakage and light refraction, it can avoid leakage when the first membrane component 2 is damaged, causing pollution or damage to the printing device; it can improve the surface smoothness of the printed part, and is suitable for desktop or cost-sensitive small 3D printing equipment.

[0078] In some embodiments of this application, please refer to Figure 1 , Figure 7 , Figure 8 and Figure 9 The 3D printing device also includes a tray bottom plate 8, the tray frame 1 is connected to the tray bottom plate 8, and the film stretching assembly 6 is sandwiched between the tray frame 1 and the tray bottom plate 8, which can realize the fixation and compression of the film stretching assembly 6 and the double-layer film assembly in the tray. Even if the first film assembly 2 is broken, the circumferential edge of the second film assembly 3 and the tray frame 1 are still in a sealed connection state, which can prevent the received liquid printing material from leaking from the circumferential edge of the second film assembly 3. The light-transmitting support member 7 is arranged on the tray bottom plate 8, which can realize the fixed arrangement of the light-transmitting support member 7.

[0079] In some embodiments of the present application, a connected input hole 82 and an output hole 84 are provided on the bottom plate body 81 of the tray bottom plate 8, wherein the input hole 82 is provided with a pipe joint 83, which can be used to realize the input or output of the fluid. When the fluid in the gap 4 is gas, the output hole 84 is provided with a gas nozzle 85 for connecting with the circulation hole 33, and the gas can be input into the gap 4 through the pipe joint 83, the input hole 82, the output hole 84, the gas nozzle 85 and the circulation hole 33 in sequence, or the gas in the gap 4 can be discharged through reverse flow.

[0080] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an" and "the" as used herein may also include the plural. The terms "comprising", "including", "containing" and "having" are inclusive and thus specify the presence of stated features, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0081] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used herein. Thus, a first element, component, region, layer or section discussed below may be referred to as a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0082] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A 3D printing material tray, characterized in that, Comprising: A tray frame (1); A first membrane assembly (2), configured to be sealingly connected to the bottom of the tray frame (1); A second membrane assembly (3), located on one side of the first membrane assembly (2), configured to form a gap (4) with the first membrane assembly (2); A membrane tensioning assembly (6), configured to be connected to the first membrane assembly (2) and the second membrane assembly (3) to tension the first membrane assembly (2) and the second membrane assembly (3).

2. The 3D printing material tray according to claim 1, characterized in that, The membrane tensioning assembly (6) includes an upper membrane tensioning frame (61) and a lower membrane tensioning frame (62). A first connecting portion (611) is provided along the circumferential direction of the upper membrane tensioning frame (61), and a second connecting portion (621) is provided along the circumferential direction of the lower membrane tensioning frame (62). The first connecting portion (611) is snap-connected to the second connecting portion (621); The circumferential edges of the first membrane assembly (2) and the circumferential edges of the second membrane assembly (3) are embedded between the first connecting portion (611) and the second connecting portion (621).

3. The 3D printing material tray according to claim 2, characterized in that, The first connecting portion (611) and the second connecting portion (621) are in concave-convex fit; positioning posts (612) are provided on the first connecting portion (611) and / or the second connecting portion (621); positioning holes matching the positioning posts (612) are provided on the circumferential edges of the first membrane assembly (2) and the circumferential edges of the second membrane assembly (3).

4. The 3D printing material tray according to claim 1, wherein, The membrane tensioning assembly (6) is embedded in the bottom of the tray frame (1).

5. The 3D printing material tray according to claim 1, characterized in that, The upper surface and / or the lower surface of the second membrane assembly (3) is provided with microstructures, and the microstructures include surface textures, micropores, fiber structures or nanoparticles.

6. The 3D printing material tray according to claim 5, characterized in that, The bottom of the first membrane assembly (2) and / or the second membrane assembly (3) is provided with a flexible substrate layer (32), and the microstructures are provided on the flexible substrate layer (32).

7. The 3D printing material tray according to claim 1, characterized in that, It further includes a spacer (5), the spacer (5) is arranged along the circumference of the gap (4), and the spacer (5) abuts between the first membrane assembly (2) and the second membrane assembly (3) to form the gap (4) between the first membrane assembly (2) and the second membrane assembly (3).

8. The 3D printing material tray according to claim 7, characterized in that, The second membrane assembly (3) is provided with a through hole (33) communicating with the gap (4).

9. The 3D printing material tray according to claim 8, wherein, A plurality of the through holes (33) are sequentially arranged along the circumference of the gap (4) on the second membrane assembly (3), and the spacer (5) is provided with an avoidance portion corresponding to the through hole (33).

10. The 3D printing material tray according to claim 1, characterized in that, It further includes a light-transmitting support member (7) arranged below the second membrane assembly (3).

11. A 3D printing device, characterized in that, It includes a tray for 3D printing according to any one of claims 1 to 10.

12. The 3D printing device according to claim 11, characterized in that, It further includes a tray bottom plate (8), the tray frame (1) is connected to the tray bottom plate (8), and the membrane tensioning assembly (6) is clamped between the tray frame (1) and the tray bottom plate (8).

Images