WO2020168808A1

WO2020168808A1 - 3d printing tray, 3d printing device and exposure stripping process

Info

Publication number: WO2020168808A1
Application number: PCT/CN2019/126919
Authority: WO
Inventors: 黄鹤源; 邢永锋; 蔡德信; 桂培炎; 武让
Original assignee: 广州黑格智造信息科技有限公司
Priority date: 2019-02-20
Filing date: 2019-12-20
Publication date: 2020-08-27

Abstract

The present disclosure relates to the technical field of 3D printing, and particularly relates to a 3D printing tray, a 3D printing device and an exposure stripping process. The 3D printing tray comprises a base, a release film, a piece of light-transmitting glass and a clamp plate, wherein a first slot and a second slot are provided in the base and both penetrate a top end face of the base; the light-transmitting glass is arranged in the first slot, and an upper surface of the light-transmitting glass is higher than a bottom wall surface of the second slot; the release film is arranged on the top end face of the base and is arranged between the base and the clamp plate in a pressed mode; and a first cavity is enclosed by the release film, an inner wall of the first slot and the light-transmitting glass, a second cavity is enclosed by the release film and an inner wall of the second slot, and the two cavities communicate with each other. During exposure, the cavities are subjected to air extraction to form a negative pressure, the release film can be tightly attached to the glass without bubbles being created therebetween, and the tensioning of the release film is realized, thereby improving the printing precision; and during the stripping of the release film, the cavities are inflated, a positive pressure is formed in the cavities, and the release film is stripped from the light-transmitting glass, and this is easily realized.

Description

3D printing tray, 3D printing equipment and exposure stripping process

Technical field

This disclosure claims the priority of Chinese Patent Application No. 201910136432.8 filed in China on February 20, 2019, and the priority of Chinese Patent Application No. CN201920232004.0 filed in China on February 20, 2019, all of which are Included here by reference.

The present disclosure relates to the field of 3D printing technology, and in particular to a 3D printing tray, a 3D printing device, and an exposure and stripping process.

Background technique

At present, with the advancement of light-curing 3D printing technology, light-curing 3D printers are also developing toward industrial machines. The professional requirements for trays that carry photosensitive materials are also increasing. The more common ones are coated trays made with silica gel and stretched film trays that use structure to tension the release film.

Common film-coated trays are composed of structural parts, transparent glass, silica gel, and release film. Glue is used to fix the transparent glass on the structural part and achieve the sealing effect. Pour the adjusted liquid silica gel onto the light-transmitting glass and let it solidify naturally. Finally, the release film is flatly attached to the silica gel. Because the adsorption force between the silica gel and the release film in the solid state is insufficient, and the solid silica gel will be damaged when locally subjected to a large force, resulting in the formation of bubbles between the silica gel and the release film, which affects the printing effect. In addition, bubbles appear. The place cannot be repaired.

The common stretch film tray is composed of structural parts and release film. Use part of the structure to lock the release film, and then use another structure frame to press down or use the transparent glass to lift the release film to create a tensioned release film plane. When the stretch film tray is loaded with resin, the center area will be dented, which will affect the flatness of the printing surface and the overall accuracy. In addition, if used for a long time, the tension of the release film will decrease, and the deformation of the release film will affect printing. Precision and quality.

Summary of the invention

The purpose of the present disclosure is to provide a 3D printing tray, 3D printing equipment, and an exposure and stripping process, which to a certain extent solves the problem that the 3D printing tray in the prior art cannot form a tensioned release film plane during the working process. This further affects the printing accuracy and the technical problem of difficult peeling of the photosensitive material after exposure in the prior art.

The present disclosure provides a 3D printing tray, including: a base, a release film, a transparent glass, and a splint; wherein the base is provided with at least a first groove and a second groove, and the first groove and the second groove The grooves pass through the top surface of the base; the transparent glass is arranged in the first groove, and the upper surface of the transparent glass is higher than the bottom wall surface of the second groove; the release film is arranged on the top surface of the base and releases The film is pressed between the base and the splint; the release film, the inner wall of the first groove and the light-transmitting glass surround the first chamber; the release film and the inner wall of the second groove surround the second chamber; The first chamber and the second chamber are communicated, and the first chamber and/or the second chamber can be communicated with the outside.

In the above technical solution, further, the 3D printing tray further includes an air path assembly, which is used to transport or exhaust air to the first chamber and/or the second chamber; the air path assembly includes connected The air connector and the pipeline, one end of the air connector is inserted into the vent hole of the base, the other end of the air connector and the pipeline are located outside the base; the vent hole communicates with the first chamber and/or the first chamber.

In the above technical solution, further, there are multiple air path components and vent holes, and the multiple air path components correspond to the multiple vent holes one-to-one.

In the above technical solution, further, the gas path assembly further includes a pressure sensor and a liquid detection sensor, and both the pressure sensor and the liquid detection sensor are arranged in the pipeline.

In the above technical solution, further, the base includes a base and a boss adjustment frame; wherein the base is provided with mounting cavities penetrating both ends of the base, the boss adjustment frame is arranged in the installation cavity, and one end of the boss adjustment frame Exposed on the base; the first groove is arranged in one end of the boss adjustment frame exposed to the base; the second groove is arranged on the base; the release film is laid on the top surface of the boss adjustment frame; light-transmitting glass The upper surface is lower than the top surface of the boss adjustment frame.

In the above technical solution, further, the boss adjustment frame includes a main body and a mounting plate; wherein the main body and the mounting plate are both ring-shaped structures; the first groove is provided on the main body; the mounting plate is arranged around the main body away from the light-transmitting glass The main body is inserted in the installation cavity, and the installation board is attached to the bottom wall of the base.

In the above technical solution, further, the 3D printing tray further includes a sealing ring disposed between the boss adjusting frame and the base.

In the above technical solution, further, the number of sealing rings is multiple, and the multiple sealing rings are evenly distributed along the height direction of the boss adjustment frame.

In the above technical solution, further, the splint is ring-shaped; the splint is arranged above the release film for pressing the release film on the base, and the splint and the base are connected by fasteners.

The present disclosure also provides a 3D printing device, including the 3D printing tray of any of the above technical solutions, which has all the beneficial technical effects of the 3D printing tray, and therefore will not be repeated.

The present disclosure also provides an exposing and peeling process for a 3D printing material tray, which includes the following steps:

A cavity is formed between the light-transmitting glass and the release film, and the cavity is extracted to a negative pressure state, so that the release film is attached to the light-transmitting glass before exposure;

Gas is introduced into the cavity to make the cavity reach a positive pressure state, so that the release film is separated from the transparent glass.

Compared with the prior art, the beneficial effects of the present disclosure are:

The 3D printing material tray provided by the present disclosure includes a base, a release film, a transparent glass, and a splint. The base supports the release film, and the splint can press the release film on the base, and the base is provided with a A groove and a second groove, the light-transmitting glass is arranged in the first groove, the release film, the inner wall of the first groove and the light-transmitting glass surround the first cavity, the release film and the second groove The inner wall of the is enclosed as a second chamber, the first chamber and the second chamber are connected, and the first chamber and the second chamber are pumped or inflated, thereby changing the first chamber and the second chamber The pressure, so that the release film and the light-transmitting glass are attached tightly or separated. The upper surface of the light-transmitting glass is higher than the upper surface of the second chamber of the base, so that when the chamber is pumped, the release film It can be attached to the transparent glass first.

When exposure is needed in the 3D printing process, the air pressure in the first chamber and the second chamber is adjusted to a suitable negative pressure state by vacuuming. In this process, the upper surface of the transparent glass is higher than the base. Surface, so that the release film above the first chamber is first attached to the upper surface of the light-transmitting glass, and then the release film above the second chamber is recessed under the external positive pressure, which can offset the assembly error The resultant release film surface is uneven. On the other hand, it produces an oblique upward surface tension on the release film above the light-transmitting glass. Because the light-transmitting glass has been surface treated, there is no gap between the release film and the light-transmitting glass. Adhesion occurs. If there are bubbles between the release film and the transparent glass, they will be drawn out along the direction of surface tension to ensure the flatness of the release film and the uniformity of surface light transmission in the printing interval. This process will be rapid Complete; when peeling is required, air pump and other devices pass air into the first chamber and the second chamber, and the air pressure in the first chamber and the second chamber is adjusted to a proper positive pressure state by the air pump and other devices, and the release The film no longer adheres closely to the light-transmitting glass, and there is a gap between the two to peel off.

It can be seen that the 3D printing tray provided by the present disclosure, during exposure, by pumping air in the first chamber and the second chamber, a negative pressure is formed in the first chamber and the second chamber, and the upper surface of the transparent glass is high On the upper surface of the second chamber, the release film can be closely attached to the glass first, and is pulled by the release film in the second chamber to form surface tension, so that the bubbles between the two are discharged, that is, the realization The tension of the release film improves the printing accuracy. When the release film is peeled off, by inflating the chamber, a proper positive pressure is formed in the chamber, and the release film is no longer closely attached to the transparent glass. When the gaps are peeled off, the whole process is easy to realize. In addition, the 3D printing tray is simple in structure, easy to replace, and more practical.

The exposure and peeling process of the 3D printing material tray provided by the present disclosure can easily realize the bonding or separation of the release film and the transparent glass by adjusting the pressure of the gas in the chamber. Therefore, the 3D printing material tray can realize fast and accurate Print.

Description of the drawings

In order to more clearly describe the specific embodiments of the present disclosure or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the specific embodiments or the description of the prior art. Obviously, the appendix in the following description The drawings are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings may be obtained based on these drawings without creative work.

FIG. 1 is a schematic diagram of an exploded structure of a 3D printing tray provided by an embodiment of the disclosure;

2 is a schematic diagram of the structure of a 3D printing tray provided by an embodiment of the disclosure;

FIG. 3 is another schematic structural diagram of a 3D printing tray provided by an embodiment of the disclosure;

Figure 4 is a cross-sectional view of Figure 3 along the A-A section;

Figure 5 is an enlarged schematic diagram of Figure 4 at B;

FIG. 6 is a flowchart of the exposure and peeling process of the 3D printing tray provided by the embodiments of the disclosure;

FIG. 7 is a process flow diagram of the 3D printing device provided by the embodiment of the disclosure during operation.

Reference signs:

1- base, 101- vent, 11- base, 12- boss adjustment frame, 121- main body, 122- mounting plate, 2- release film, 3- transparent glass, 4- plywood, 5- first Chamber, 6-second chamber, 7-seal ring, 8-air circuit assembly, 801-air connector, 802-pipe.

detailed description

The technical solutions of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments.

The components of the embodiments of the present disclosure generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed present disclosure, but merely represents selected embodiments of the present disclosure.

Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be construed as limiting the present disclosure. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be interpreted broadly. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present disclosure can be understood in specific situations.

Hereinafter, the exposure and peeling process of the 3D printing tray, the 3D printing device, and the 3D printing tray according to some embodiments of the present disclosure will be described with reference to FIGS. 1 to 7.

1 to 5, the embodiment of the present disclosure provides a 3D printing tray, including: a base 1, a release film 2, light-transmitting glass 3 and a plywood 4; wherein, the base 1 is provided with at least a first A groove and a second groove, and both the first groove and the second groove penetrate the top surface of the base 1;

The light-transmitting glass 3 is arranged in the first groove, and the upper surface of the light-transmitting glass 3 is higher than the bottom wall surface of the second groove; the release film 2 is arranged on the top surface of the base 1, and the release film 2 is pressed on Between the base 1 and the splint 4;

The release film 2, the inner wall of the first groove, and the light-transmitting glass 3 enclose the first chamber 5; the release film 2 and the inner wall of the second groove enclose the second chamber 6; the first chamber 5 And the second chamber 6 is communicated, and the first chamber 5 and/or the second chamber 6 can communicate with the outside.

The 3D printing tray provided by the present disclosure includes: a base 1, a release film 2, a light-transmitting glass 3, and a splint 4. The base 1 supports the release film 2, and the splint 4 can press the release film 2 on On the base 1, a first groove and a second groove are provided on the base 1, the light-transmitting glass 3 is arranged in the first groove, the release film 2, the inner wall of the first groove, and the light-transmitting glass 3 are surrounded by The first cavity 5, the release film 2 and the inner wall of the second groove surround the second cavity 6. The first cavity 5 and the second cavity 6 are communicated with each other. The chamber 6 is evacuated or inflated, thereby changing the pressure in the first chamber 5 and the second chamber 6, so that the release film 2 and the light-transmitting glass 3 are tightly attached or separated. The upper surface is higher than the upper surface of the second cavity 6 of the base 1, so that when the cavity is evacuated, the release film 2 can be attached to the transparent glass 3 first.

When exposure is required in the 3D printing process, the air pressure in the first chamber 5 and the second chamber 6 is adjusted to a suitable negative pressure state by vacuuming. In this process, due to the upper surface of the transparent glass 3 The bottom wall surface of the second chamber 6 is higher than the base 1, so that the release film 2 above the first chamber 5 is first attached to the upper surface of the transparent glass 3, and then the release film above the second chamber 6 2 Depression downward under the external positive pressure, on the one hand to offset the uneven surface of the release film 2 caused by assembly errors, on the other hand, produce an oblique upward surface tension on the release film 2 above the transparent glass 3 , Since the transparent glass 3 has been surface-treated, there will be no adhesion between the release film 2 and the transparent glass 3. If there are bubbles between the release film 2 and the transparent glass 3, it will follow the direction of surface tension It is drawn out to ensure the flatness of the release film 2 and the uniformity of the surface light transmission in the printing interval. This process will be completed quickly; when it needs to be peeled off, the air pump and other devices are sent to the first chamber 5 and the second chamber 6 Blow in air, adjust the air pressure in the first chamber 5 and the second chamber 6 to a proper positive pressure state by means of an air pump, etc., the release film 2 is no longer tightly attached to the light-transmitting glass 3, and there appears between the two The gap is peeled off.

It can be seen that in the 3D printing tray provided by the present disclosure, by pumping air in the first chamber 5 and the second chamber 6, a negative pressure is formed in the first chamber 5 and the second chamber 6, and the light is transparent The upper surface of the glass 3 is higher than the upper surface of the second chamber 6, so that the release film 2 can be closely attached to the glass first, and is pulled by the release film 2 in the second chamber 6 to form surface tension, The air bubbles between the two are expelled, that is, the tension of the release film 2 is realized, and the printing accuracy is improved. When the release film 2 is peeled off, by inflating the cavity, a proper positive pressure is formed in the cavity, and the release film 2 It is no longer tightly attached to the light-transmitting glass 3, and there is a gap between the two, and the whole process is easy to realize. In addition, the 3D printing tray is simple in structure, easy to replace, and more practical.

Wherein, optionally, the first chamber 5 or the second chamber 6 can be connected to the outside through the ventilation hole 101 opened on the base 1; or the first chamber 5 or the second chamber 6 can be communicated with the outside through the base 1 Different ventilation channels are connected to the outside world, so as to facilitate the connection of external gas devices such as air pumps.

Wherein, optionally, the first chamber 5 and the second chamber 6 can be connected through the gap between the release film 2 and the base 1. Of course, it is not limited to this, and can also be connected through an airway opened on the base 1. through.

Wherein, optionally, the release film 2 can cover the transparent glass 3, the first cavity 5 and the second cavity 6.

Wherein, optionally, the base 1 includes a body and an annular plate; wherein, one end of the opening of the first groove and one end of the second groove both penetrate through one end of the body, and the annular plate surrounds the opposite other of the body. One end; where the body and the ring plate are an integral structure, of course, it is not limited to this.

In an embodiment of the present disclosure, preferably, as shown in FIG. 1, the 3D printing tray further includes an air path assembly 8, which is used to transport the first chamber 5 and/or the second chamber 6. Gas or exhaust;

The air circuit assembly 8 includes an air connector 801 and a pipeline 802 connected to each other. One end of the air connector 801 is inserted into the vent 101 of the base 1, and the other end of the air connector 801 and the pipeline 802 are located outside the base 1; 101 communicates with the first chamber 5 and/or the second chamber 6.

In this embodiment, the air connector 801 can be used as a vacuum chamber, and the vacuum chamber is connected to the pipeline 802 with a filter screen, and the release film 2 ruptured resin will first enter the vacuum chamber and be blocked on the inner wall of the vacuum chamber On the upper side, a filter screen can be set at the outlet of the vacuum chamber, coupled with the blocking effect of the filter screen, to prevent the resin from damaging the control element or the vacuum source after entering the gas path. Among them, the air connector 801 facilitates the connection of the pipeline 802, and the air connector 801 can be a component in the prior art.

Wherein, optionally, the air connector 801 is connected with the side wall of the vent hole 101 on the base 1 through a thread. The other end of the pipe 802 away from the air connector 801 can be used to connect to an external air pump and other gas devices.

Wherein, optionally, the number of the air path assembly 8 is at least one.

In an embodiment of the present disclosure, preferably, as shown in FIG. 3, the number of air path components 8 and the number of vent holes 101 are multiple, and the multiple air path components 8 correspond to the multiple vent holes 101 one-to-one. .

In this embodiment, the number and positions of the air path assembly 8 and the ventilation holes 101 can be selected according to actual needs to meet actual needs.

Wherein, optionally, multiple air path components 8 are symmetrically arranged on both sides of the base 1.

In an embodiment of the present disclosure, preferably, the gas path assembly 8 further includes a pressure sensor and a liquid detection sensor, and both the pressure sensor and the liquid detection sensor are arranged in the pipeline 802. (Not shown in the picture)

In this embodiment, a pressure sensor is provided in the gas path, which can detect the air pressure during vacuuming, and is used to control the degree of vacuuming. A liquid detection sensor is also provided in the gas path to prevent the release film 2 from rupturing the resin from entering the gas path. After the control element is damaged, in addition, if a vacuum chamber is set in the air path, the air connector 801 in the present disclosure can be regarded as a vacuum chamber, or a vacuum chamber can be provided between the air connector 801 and the pipeline 802, and the vacuum chamber is A filter screen is installed at the connection of the pipeline 802. The resin will enter the vacuum chamber when the release film 2 is broken and be blocked on the inner wall of the vacuum chamber. In addition, the filter screen prevents the resin from damaging the control element after entering the air path. Or a vacuum source.

In an embodiment of the present disclosure, preferably, as shown in FIGS. 1, 4, and 5, the base includes a base 11 and a boss adjustment frame 12; The platform adjustment frame 12 is arranged in the installation cavity, and one end of the boss adjustment frame 12 is exposed to the base 11; the first groove is arranged in the end of the boss adjustment frame 12 exposed to the base 11, and the second groove is arranged in On the base 11; the release film 2 is laid on the top surface of the boss adjustment frame 12; the upper surface of the transparent glass 3 is lower than the top surface of the boss adjustment frame 12.

In this embodiment, the boss adjusting frame 12 is higher than the top surface of the base 11, the release film 2 is laid on the top surface of the boss adjusting frame 12, and the boss adjusting frame 12 can flexibly adjust the position of the release film 2. The effect of the height of the position is to adjust the height between the translucent glass 3 and the release film 2, as well as the height of the release film 2 and the bottom wall of the second chamber 6, thereby changing the size of the chamber, thereby changing The pressure in the chamber changes the degree of tension when the release film 2 is attached to the glass, and the adjustment is more flexible. Of course, the boss adjusting frame 12 can also be lower than the top surface of the base 11.

Wherein, optionally, the boss adjusting frame 12 and the base 11 may also be an integrated structure.

In an embodiment of the present disclosure, preferably, as shown in FIGS. 4 and 5, the boss adjustment frame 12 includes a main body 121 and a mounting plate 122; wherein, the main body 121 and the mounting plate 122 are both ring-shaped structures; The groove is arranged on the main body 121;

The mounting plate 122 is enclosed on the outer wall surface of the end of the main body 121 away from the transparent glass 3; the main body 121 is inserted into the installation cavity, and the mounting plate 122 is attached to the bottom wall surface of the base 11.

In this embodiment, the main body 121 is inserted into the mounting cavity of the base 11, the mounting plate 122 is attached to the bottom surface of the base 11, and the mounting plate 122 and the base 11 are locked by fasteners such as screws or bolts. Tightly, the assembly of the boss adjustment frame 12 and the base 11 is realized, and the transparent glass 3 is placed in the first groove, so that the assembly of the transparent glass 3 and the boss adjustment frame 12 is realized. The light-transmitting glass 3 is placed in the first groove, and the inner wall of the first groove has a position limiting effect on the light-transmitting glass 3, which makes the light-transmitting glass 3 more stable and less prone to shaking. Wherein, optionally, the light-transmitting glass 3 can be glued to the inner wall of the first groove through a sealant, of course, it is not limited to this.

Wherein, optionally, the upper surface of the main body 121 is higher than the upper surface of the transparent glass 3.

Wherein, optionally, the main body 121 and the mounting plate 122 are an integral structure, of course, it is not limited to this.

In an embodiment of the present disclosure, preferably, as shown in FIGS. 1 and 5, the 3D printing tray further includes a sealing ring 7, and the sealing ring 7 is arranged between the boss adjusting frame 12 and the base 11.

In this embodiment, the sealing ring 7 functions to seal the gap between the boss adjustment frame 12 and the base 11, so that the two are more closely matched. Wherein, optionally, the sealing ring 7 is installed in the boss adjustment frame 12, of course, it is not limited to this.

Wherein, optionally, the number of the sealing ring 7 may be multiple, and the multiple sealing rings 7 are evenly distributed between the boss adjusting frame 12 and the base 11, and the sealing effect is better.

In an embodiment of the present disclosure, preferably, as shown in FIG. 5, the splint 4 is annular; the splint 4 is arranged above the release film 2 for pressing the release film 2 on the base 1, and The splint 4 and the base 1 are connected by fasteners.

In this embodiment, the release film 2 can cover the base 1, and the clamping plate 4 can just press the release film 2 on the base 1, avoiding the release film 2 from moving in the horizontal plane.

Among them, the base 1 and the splint 4 are separated by the release film 2, and the base 1 and the splint 4 are connected and fixed together by fasteners such as fastening bolts.

The embodiments of the present disclosure also provide a 3D printing device, including the 3D printing tray described in any of the above embodiments. The process flow of the 3D printing equipment is shown in Figure 7. The forming platform is lowered into position, and the 3D printing tray is connected to the air pump for air extraction, so that a negative pressure state is formed between the transparent glass 3 and the release film 2, and the release The film 2 and the light-transmitting glass 3 are attached and tensioned, and the photo-mechanical exposure is performed. The first layer is printed between the forming platform and the release film 2. The forming platform drives the printed part to rise, and the 3D printing tray is connected to the air pump for inflation , So that a positive pressure state is formed between the light-transmitting glass 3 and the release film 2, and the release film 2 and the light-transmitting glass 3 are peeled off, the peeling operation is completed, and the operations are cycled sequentially, thus completing the multilayer printing.

As shown in FIG. 6, an embodiment of the present disclosure also provides an exposure and peeling process for a 3D printing tray, which includes the following steps:

S100. A cavity is formed between the light-transmitting glass and the release film, and the cavity is extracted to a negative pressure state, so that the release film is attached to the light-transmitting glass, and then exposure is performed;

S200: Inject gas into the cavity to make the cavity reach a positive pressure state, so that the release film is separated from the light-transmitting glass.

In this embodiment, when exposure is required during the 3D printing process, the air pressure in the cavity is adjusted to a suitable negative pressure state by vacuuming. In this process, the release film is attached to the transparent glass The upper surface is tensioned; when it needs to be stripped, air pumps and other devices pass air into the cavity, and the air pressure in the cavity is adjusted to a proper positive pressure state by the air pumps and other devices, and the release film is no longer with the transparent glass It fits tightly, and there is a gap between the two to peel off, and the operation is simple and convenient. Among them, the negative pressure state ensures that the release film is tightly attached to the glass, thereby ensuring the uniform thickness of a single layer during printing, ensuring printing accuracy and surface quality; the positive pressure state facilitates the separation between the printed part and the release film.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present disclosure. range.

Claims

A 3D printing material tray, which is characterized by comprising: a base, a release film, a transparent glass and a plywood;

Wherein, the base is provided with at least a first groove and a second groove, and both the first groove and the second groove penetrate the top surface of the base;

The light-transmitting glass is arranged in the first groove, and the upper surface of the light-transmitting glass is higher than the bottom wall surface of the second groove; the release film is arranged on the top surface of the base, And the release film is pressed between the base and the splint;

The release film, the inner wall of the first groove, and the light-transmitting glass surround a first chamber; the release film and the inner wall of the second groove surround a second chamber; The first chamber and the second chamber are in communication, and the first chamber and/or the second chamber can be in communication with the outside.
The 3D printing tray according to claim 1, wherein the 3D printing tray further comprises an air path assembly, the air path assembly is used to connect the first cavity and/or the second cavity Room air delivery or exhaust;

The air circuit assembly includes an air joint and a pipeline connected, and one end of the air joint is inserted into the vent hole of the base, and the other end of the air joint and the pipeline are located outside the base ; The vent hole communicates with the first chamber and/or the first chamber.
The 3D printing tray according to claim 2, wherein the number of the air path components and the number of the vent holes are multiple, and the plurality of air path components are the same as the plurality of vent holes One correspondence.
The 3D printing tray according to claim 2 or 3, wherein the gas path component further comprises a pressure sensor and a liquid detection sensor, and the pressure sensor and the liquid detection sensor are both arranged in the pipeline .
The 3D printing tray according to any one of claims 1 to 4, wherein the base includes a base and a boss adjustment frame;

Wherein, the base is provided with a mounting cavity penetrating both ends of the base, the boss adjusting frame is arranged in the mounting cavity, and one end of the boss adjusting frame is exposed from the base; the first A groove is provided in an end of the boss adjusting frame exposed outside the base, and the second groove is provided on the base;

The release film is laid on the top surface of the boss adjustment frame; the upper surface of the transparent glass is lower than the top surface of the boss adjustment frame.
The 3D printing tray according to claim 5, wherein the boss adjustment frame comprises a main body and a mounting plate;

Wherein, the main body and the mounting plate are both ring-shaped structures; the first groove is provided on the main body; the mounting plate is surrounded by the outer wall surface of the end of the main body away from the light-transmitting glass On; the main body is inserted in the mounting cavity, and the mounting plate is attached to the bottom wall of the base.
The 3D printing tray according to claim 5 or 6, wherein the 3D printing tray further comprises a sealing ring, and the sealing ring is arranged between the boss adjusting frame and the base.
8. The 3D printing tray according to claim 7, wherein the number of the sealing rings is multiple, and the multiple sealing rings are evenly distributed along the height direction of the boss adjustment frame.
The 3D printing tray according to any one of claims 1 to 4, wherein the splint is ring-shaped;

The splint is arranged above the release film for pressing the release film on the base, and the splint and the base are connected by a fastener.
A 3D printing device, which is characterized by comprising the 3D printing tray according to any one of claims 1 to 9.
A process for exposing and peeling a 3D printing material tray is characterized in that it comprises the following steps:

A cavity is formed between the light-transmitting glass and the release film, and the cavity is extracted to a negative pressure state, so that the release film is attached to the light-transmitting glass, and then exposure is performed;

Gas is introduced into the cavity to make the cavity reach a positive pressure state, so that the release film is separated from the light-transmitting glass.