Film stretching pressing plate assembly and film stretching mechanism

Abstract

The utility model relates to the technical field of photocuring equipment, in particular to a film stretching pressing plate assembly and a film stretching mechanism, the film stretching pressing plate assembly is applied to the photocuring equipment, the photocuring equipment comprises a film stretching assembly, the film stretching assembly is provided with a receding space for containing a release film, and the film stretching pressing plate assembly comprises a film stretching pressing plate, a transparent flat plate and an isolating layer; under the condition that the connecting part is connected with the film stretching assembly, the transparent flat plate can extend into the abdicating space; the transparent flat plate is isolated from the release film through the isolation layer; by arranging the isolating layer, the problem that the transparent flat plate is directly attached to the release film to cause an optical cement effect and is difficult to release can be avoided, so that the release effect of the release film is improved, the liquid level leveling time of the photosensitive resin on the release film is effectively shortened, and the working efficiency of the photocuring equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of photocuring equipment technology, and in particular to a film stretching plate assembly and a film stretching mechanism. Background Technology

[0002] In pull-down 3D printing equipment based on surface projection micro-stereolithography technology, bulging in the central area of ​​the release film is a common phenomenon during large-format processing. This is mainly related to factors such as exposure parameters, resin characteristics, and equipment design. Firstly, poor resin flowability requires a longer time for leveling during film and repositioning. Excessive leveling time leads to decreased processing efficiency and consequently, longer overall processing time. Furthermore, differences in leveling time between different resins also affect the stability of this process. Secondly, larger exposure parameters can cause resin expansion, especially in the central area of ​​the large-format release film, which is more relaxed than the edges, making it prone to bulging. Regarding equipment design, the looseness and uneven stretching of the release film are also contributing factors, particularly during large-format processing, where the center of the film is more susceptible to deformation. Additionally, improper temperature control and uneven exposure light sources can exacerbate bulging. Excessively high temperatures or uneven light sources can cause uneven resin expansion, thus affecting processing accuracy. Utility Model Content

[0003] In order to solve at least one of the above-mentioned technical problems, the film-stretching plate assembly of this utility model can avoid the photoadhesive effect caused by the direct bonding of the transparent plate to the release film, which makes it difficult to release the film, thereby improving the release effect of the release film, effectively shortening the liquid leveling time of the photosensitive resin on the release film, and improving the working efficiency of the photocuring equipment.

[0004] This utility model provides a film stretching plate assembly for use in a photocuring device. The photocuring device includes a film stretching assembly, which has a clearance space for accommodating a release film. The film stretching plate assembly includes a film stretching plate, a transparent flat plate, and an isolation layer.

[0005] The stretching plate is provided with a mounting groove and a connecting part for connecting with the stretching assembly, and the transparent plate is disposed in the mounting groove; when the connecting part is connected with the stretching assembly, the transparent plate can extend into the clearance space; the transparent plate and the release film are separated by the isolation layer.

[0006] In some possible embodiments, the insulating layer is a colloidal layer;

[0007] When the connecting portion is connected to the film assembly, the colloid layer abuts against the release film.

[0008] In some possible embodiments, the stretching plate includes a housing with openings at both ends and the connecting portion, the connecting portion being disposed on the side of the housing away from the release film;

[0009] The mounting groove is provided on the side of the housing away from the connecting portion.

[0010] In some possible embodiments, the housing is provided with a casting groove for casting the colloidal layer, the casting groove is spaced apart from the transparent plate, and the casting groove is located on the side of the housing near the transparent plate facing the release film.

[0011] In some possible embodiments, when the connecting portion is connected to the membrane assembly, the isolation layer is a sealed isolation cavity formed between the transparent plate and the release film.

[0012] In some possible embodiments, the film-pressing plate assembly further includes an air supply device capable of forming the sealed isolation cavity between the transparent plate and the release film.

[0013] In some possible embodiments, the air supply device includes an air inlet and an air outlet, both of which are disposed between the transparent flat plate and the release film and communicate with the sealed isolation cavity;

[0014] The air inlet is used to inflate air between the transparent plate and the release film;

[0015] The vent is used to evacuate the sealed isolation cavity between the transparent plate and the release film.

[0016] In some possible embodiments, the membrane plate assembly further includes a sealing ring;

[0017] The bottom of the mounting groove is provided with an annular fixing groove, part of the sealing ring is disposed in the annular fixing groove, and the remaining part of the sealing ring protruding from the annular fixing groove abuts against the transparent plate.

[0018] In some possible embodiments, the transparent plate has an annular notch on the edge away from the isolation layer, and the remaining portion of the sealing ring protruding from the annular fixing groove is disposed within the annular notch.

[0019] In some possible embodiments, the remaining portion of the sealing ring disposed within the annular notch abuts against the inner wall of the housing and the side wall of the annular notch, respectively.

[0020] In some possible embodiments, the transparent plate, the isolation layer, and the release film are arranged in parallel, and the isolation layer is used to cover the area between the transparent plate and the release film.

[0021] In some possible embodiments, one end of the housing further includes an abutment surface disposed opposite to the connecting portion, the abutment surface being disposed around the mounting groove.

[0022] In some possible embodiments, after the transparent plate is installed in the mounting groove, the transparent plate and the mounting groove still form a groove-shaped structure for accommodating the isolation layer. The isolation layer is disposed behind the groove-shaped structure, and the side of the isolation layer away from the transparent plate is located on the same plane as the contact surface.

[0023] In some possible embodiments, the height of the housing is greater than or equal to the height of the membrane assembly.

[0024] The second aspect of this utility model also protects a film stretching mechanism, which includes a film stretching assembly and a film stretching pressure plate assembly as described above.

[0025] The membrane assembly has clearance space for accommodating the release membrane;

[0026] After the membrane assembly is connected to the connecting part, the transparent plate extends into the clearance space, and the isolation layer is placed between the transparent plate and the release film.

[0027] In some possible embodiments, the bandage assembly includes a first bandage clamp and a second bandage clamp disposed opposite to each other, and the release film is disposed between the first bandage clamp and the second bandage clamp;

[0028] The first and second bandage clamps are detachably connected via a first connector.

[0029] The first bandage splint has a first clearance space, and the second bandage splint has a second clearance space. After the first bandage splint and the second bandage splint are connected, the first clearance space and the second clearance space form the clearance space.

[0030] Implementing the embodiments of this utility model has at least the following beneficial effects:

[0031] The film-stretching plate assembly in this invention can cooperate with the film-stretching assembly, and the film-stretching plate assembly is an independent module relative to the film-stretching assembly. This makes the film-stretching plate assembly easy to disassemble and replace, simplifying the disassembly and assembly operations. Simultaneously, the film-stretching plate assembly is provided with mutually cooperating film-stretching plates, transparent flat plates, and release layers. The release layer is placed between the transparent flat plate and the release film, and can adhere to one side surface of the release film, achieving a tighter fit between the transparent flat plate, release layer, and release film. This prevents air bubbles from forming between the release layer and the release film, thus ensuring a smooth release. The release film's smoothness and release effect are improved, thus enhancing the printing effect of the photocuring equipment. More importantly, by setting an isolation layer, the deformation of the release film after multiple releases can be mitigated, and the release force of the release film can be reduced. It can also improve the bulging problem caused by the photocuring equipment during curing. The isolation layer also prevents the transparent plate from being directly bonded to the release film, which would cause a photoadhesive effect and make release difficult, thereby improving the release effect of the release film, effectively shortening the liquid leveling time of the photosensitive resin on the release film, and improving the working efficiency of the photocuring equipment. Attached Figure Description

[0032] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this utility model. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0033] Figure 1 This is an exploded view of the membrane tensioning plate assembly and the membrane tensioning assembly after connection in this embodiment;

[0034] Figure 2 This is an isometric view of the membrane tensioning plate assembly and the membrane tensioning assembly after connection in this embodiment;

[0035] Figure 3 This is a front view of the membrane tensioning plate assembly and the membrane tensioning assembly after they are connected in this embodiment;

[0036] Figure 4 for Figure 3 A partial cross-sectional view;

[0037] Figure 5 This is a partial cross-sectional view of the membrane pressing plate in this embodiment.

[0038] The corresponding reference numerals in the figure are as follows:

[0039] 1-Stretching plate; 2-Transparent flat plate; 3-Isolation layer; 4-Sealing ring; 5-Release film; 6-Stretching assembly; 11-Housing; 12-Connecting part; 61-First stretching clamp; 62-Second stretching clamp; 111-Mounting groove; 112-Abutting surface; 113-Annular fixing groove. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0041] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. In the description of the present invention, it should be understood that the terms "upper," "lower," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0043] See appendix Figures 1-5This embodiment provides a film-stretching plate assembly for use in a photocuring device. The photocuring device includes a film-stretching assembly 6, which has a clearance space for accommodating a release film 5. The film-stretching plate assembly includes a film-stretching plate 1, a transparent plate 2, and an isolation layer 3. The film-stretching plate 1 is provided with a mounting groove 111 and a connecting part 12 for connecting with the film-stretching assembly 6. The transparent plate 2 is disposed in the mounting groove 111. When the connecting part 12 is connected to the film-stretching assembly 6, the transparent plate 2 can extend into the clearance space. The isolation layer 3 is located on the side of the transparent plate 2 facing the release film 5, and the transparent plate 2 and the release film 5 are isolated by the isolation layer 3. The film-stretching plate of this utility model... The pressure plate assembly can cooperate with the stretching assembly 6, and the stretching pressure plate assembly is an independent module relative to the stretching assembly 6. This makes the stretching pressure plate assembly easy to disassemble and replace, simplifying the disassembly and assembly operations. At the same time, the stretching pressure plate assembly is provided with a mutually cooperating stretching pressure plate 1, a transparent flat plate 2, and an isolation layer 3. The isolation layer 3 is placed between the transparent flat plate 2 and the release film 5. The isolation layer 3 can adhere to one side surface of the release film 5, which can achieve a tighter fit between the transparent flat plate 2, the isolation layer 3, and the release film 5. Without the isolation layer 3, the release film 5 will be stretched and softened after multiple releases, and will not be able to maintain a tight state, thus randomly generating air bubbles on the release film 5. This invention, by setting an isolation layer 3, can reduce air bubbles generated after multiple releases of the release film 5, thereby ensuring the flatness of the release film 5 and improving its release effect, thus improving the printing effect of the photocuring equipment. More importantly, by setting an isolation layer 3, the deformation of the release film 5 after multiple releases can be improved and the release force of the release film 5 can be reduced. It can also improve the bulging problem caused by the photocuring equipment during curing. By setting an isolation layer 3, the direct adhesion between the transparent plate 2 and the release film 5 can be avoided, which would cause a photoadhesive effect and make release difficult, thereby improving the release effect of the release film 5, effectively shortening the liquid leveling time of the photosensitive resin on the release film 5, and improving the working efficiency of the photocuring equipment.

[0044] It is understood that the stretching plate assembly can extend into the clearance space of the stretching assembly 6, and the stretching plate assembly will press the release film 5 set on the stretching assembly 6 toward the side away from the stretching plate assembly, and the release film 5 will be in a taut state; in this embodiment, the isolation layer 3 is an adhesive layer or a sealed isolation cavity. Both the adhesive layer and the sealed isolation cavity can isolate the transparent plate 2 and the release film 5, thereby avoiding direct adhesion between the transparent plate 2 and the release film 5 during the release process after exposure.

[0045] In this embodiment, the transparent plate 2 is fixed to the mounting groove 111 by snap-fit ​​or glue. Preferably, the transparent plate 2 is fixedly connected to the side wall of the mounting groove 111 by glue.

[0046] In this embodiment, the transparent plate 2 is made of an optical material with high light transmittance, high rigidity and chemical corrosion resistance.

[0047] In some possible embodiments, the isolation layer 3 is an adhesive layer; when the connecting part 12 is connected to the film assembly 6, the adhesive layer abuts against the release film 5. By setting the adhesive layer, the structure of the isolation layer 3 can be simplified, and the direct adhesion between the transparent plate 2 and the release film 5 can be avoided, which would lead to a photoadhesive effect and make it difficult to release the film, thereby ensuring the release effect of the release film 5.

[0048] Specifically, when the transparent plate 2 extends into the clearance space of the stretching assembly 6 and the connecting part 12 is connected to the stretching assembly 6, the isolation layer 3 always abuts against the release film 5.

[0049] In this embodiment, the stiffness of the colloidal layer is between that of the transparent plate 2 and the stiffness of the resin used in the photocuring equipment.

[0050] In this embodiment, the material of the colloidal layer is silicone or hydrogel.

[0051] In some possible embodiments, the stretching plate 1 includes a housing 11 with openings at both ends and a connecting part 12. The connecting part 12 is disposed on the side of the housing 11 away from the release film 5. A mounting groove 111 is provided on the side of the housing 11 away from the connecting part 12. By providing the mutually cooperating housing 11 and connecting part 12, after the housing 11 is pressed into the clearance space of the stretching assembly 6, the connecting part 12 is connected to the stretching assembly to limit the depth of the housing 11 pressed into the clearance space, so as to avoid the excessive pressing depth of the housing 11 from damaging the release film 5.

[0052] In this embodiment, the connecting part 12 is a structure connected to the membrane assembly 6, and the housing 11 is a structure that extends into the clearance space. The connecting part 12 can be regarded as a snap-fit ​​step provided at the open end on one side of the housing 11. The shape of the housing 11 is adapted to the shape of the clearance space of the membrane assembly 6. After the housing 11 extends into the clearance space of the membrane assembly 6, the housing 11 and the clearance space are in clearance fit or transition fit.

[0053] Specifically, the connecting part 12 is provided with a plurality of first mounting holes, and the membrane assembly 6 is provided with a plurality of second mounting holes that cooperate with the first mounting holes. The second connector passes through the first mounting holes and the second mounting holes in sequence to realize the detachable connection between the connecting part 12 and the membrane assembly 6.

[0054] See appendix Figure 4 One end of the housing 11 also includes an abutment surface 112 disposed opposite to the connecting part 12. The abutment surface 112 is disposed around the mounting groove 111. The transparent plate 2 is installed in the mounting groove 111. There is a distance between the transparent plate 2 and the abutment surface 112. The side of the isolation layer 3 away from the transparent plate 2 is located on the same plane as the abutment surface 112.

[0055] Furthermore, after the transparent plate 2 is installed in the mounting groove 111, the transparent plate 2 and the mounting groove 111 still form a groove-shaped structure for accommodating the isolation layer 3. The isolation layer 3 is placed behind the groove-shaped structure, and the side of the isolation layer 3 away from the transparent plate 2 is located on the same plane as the contact surface 112. That is, the depth of the groove-shaped structure formed by the transparent plate 2 and the mounting groove 111 is the thickness of the colloidal layer.

[0056] Specifically, the film pressing plate assembly extends into the clearance space of the film pressing plate assembly 6, and after the film pressing plate assembly is fixedly connected to the film pressing plate assembly 6, the contact surface 112 of the housing 11 and the isolation layer 3 abut against the release film 5.

[0057] In some possible embodiments, the height of the housing 11 is greater than or equal to the height of the stretching assembly 6, thus facilitating contact between the release film 5 and the resin during the printing process of the photocuring equipment. That is, when the connecting portion 12 is connected to the stretching assembly, the end of the housing 11 away from the connecting portion 12 protrudes beyond the end of the stretching assembly 6 away from the connecting portion 12, or the end of the housing 11 away from the connecting portion 12 and the end of the stretching assembly 6 away from the connecting portion 12 are located on the same horizontal plane.

[0058] In some possible embodiments, the housing 11 is provided with a casting groove for casting the colloidal layer. The casting groove is spaced apart from the transparent plate 2 and is located on the side of the housing 11 facing the release film 5 near the transparent plate 2. By providing the casting groove, it is convenient to cast the colloidal layer and improve the casting efficiency.

[0059] The preparation process of the colloidal layer is as follows: after the transparent plate 2 is installed in the mounting groove 111, the colloidal material that can form the above-mentioned colloidal layer is poured into the casting groove, and the colloidal material placed on the transparent plate 2 is cured. Once the curing is complete, the colloidal layer is formed.

[0060] In this embodiment, the size and shape of the casting trough are not limited, as long as it is ensured that a colloidal layer can be formed by casting on the side of the transparent plate 2 facing the release film 5 through the casting trough.

[0061] In some possible embodiments, when the connecting part 12 is connected to the film assembly 6, the isolation layer 3 is a sealed isolation cavity formed between the transparent plate 2 and the release film 5. By setting the sealed isolation cavity, the transparent plate 2 can be prevented from being directly attached to the release film 5, which would cause a photoadhesive effect and make it difficult to release the film, thereby improving the release effect of the release film 5.

[0062] In some possible embodiments, the film-pressing plate assembly also includes an air supply device that can form a sealed isolation cavity between the transparent plate 2 and the release film 5. By setting the air supply device, the sealed isolation cavity can be achieved by inflating the space between the transparent plate 2 and the release film 5, which simplifies the preparation operation of the isolation layer 5 and reduces the preparation cost.

[0063] In some possible embodiments, the air supply device includes an air inlet and an air outlet, both of which are located between the transparent plate 2 and the release film 5. The air inlet is used to inflate the space between the transparent plate 2 and the release film 5; the air outlet is used to evacuate the sealed isolation cavity between the transparent plate 2 and the release film 5. By providing an air inlet and an air outlet, it is convenient for the air supply device to inflate and evacuate the space between the transparent plate 2 and the release film 5. Inflating the space between the transparent plate 2 and the release film 5 facilitates the formation of the sealed isolation cavity, and evacuating the space between the transparent plate 2 and the release film 5 can prevent the release film 5 from generating air bubbles during the exposure process, thereby avoiding affecting the printing quality.

[0064] In this embodiment, the photocuring equipment has an exposure operation during operation. If the sealed isolation cavity is always filled with gas, the release film 5 will generate bubbles during the exposure process, which will affect the printing quality. In order to avoid affecting the printing quality, the gas supply equipment is provided with an outlet for evacuating the sealed isolation cavity.

[0065] Specifically, during the exposure process, the air inlet is closed and the air outlet is opened, meaning the air supply equipment is controlled to create a vacuum between the transparent plate 2 and the release film 5 through the air outlet before exposure. This prevents air bubbles from forming in the release film 5 during exposure, which would affect printing quality, and also prevents bulging of the release film 5 due to the presence of cavities. After exposure, the air inlet is opened and the air outlet is closed, meaning the air supply equipment is controlled to fill the space between the transparent plate 2 and the release film 5 with air through the air inlet to form a sealed isolation cavity, thereby assisting in the release process.

[0066] In this embodiment, the location and size of the air inlet and outlet are set according to the actual situation and are not limited here.

[0067] In some possible embodiments, the air inlet and the air outlet are spaced apart on the side wall of the housing 11 near the mounting groove 111. Specifically, after the transparent plate 2 is installed in the mounting groove 111, the sealed isolation cavity between the transparent plate 2 and the release film 5 is connected to the air inlet and the air outlet, respectively.

[0068] See appendix Figure 4 and attached Figure 5In some possible embodiments, the film pressing plate assembly further includes a sealing ring 4; an annular fixing groove 113 is provided at the bottom of the mounting groove 111, a portion of the sealing ring 4 is disposed within the annular fixing groove 113, and the remaining portion of the sealing ring 4 protrudes from the annular fixing groove 113 and abuts against the transparent plate 2. By setting the sealing ring 4, the installation position of the transparent plate 2 and the mounting groove 111 can be sealed. When the isolation layer 3 is a sealed isolation cavity formed between the transparent plate 2 and the release film 5, foreign objects can be prevented from falling into the release film 5 through the installation gap between the transparent plate 2 and the mounting groove 111, thus avoiding damage to the release film 5 or affecting the printing quality. When the isolation layer 3 is an adhesive layer, foreign objects can be prevented from falling into the adhesive layer through the installation gap between the transparent plate 2 and the mounting groove 111, thereby preventing foreign objects on the adhesive layer from blocking the transmission path of the light emitted by the light source assembly, thus avoiding affecting the printing quality.

[0069] In some possible embodiments, an annular notch is provided on the edge of the transparent plate 2 away from the isolation layer 3, and the remaining portion of the sealing ring 4 protruding from the annular fixing groove 113 is disposed within the annular notch, further improving the sealing effect of the sealing ring 4 on the transparent plate 2. The opposite sides of the remaining portion of the sealing ring 4 disposed within the annular notch abut against the inner wall of the housing 11 and the side wall of the annular notch, respectively, to improve the fixing stability of the sealing ring 4. In other embodiments, the sealing ring 4 can be fixed by means of adhesive or other methods.

[0070] In some possible embodiments, the transparent plate 2, the isolation layer 3, and the release film 5 mounted on the mounting groove 111 are arranged in parallel, and the isolation layer 3 is used to cover the area between the transparent plate 2 and the release film 5. The above arrangement can ensure that there is no gap between the isolation layer 3 and the release film 5 when they are in contact, and ensure that the isolation layer 3 and the release film 5 can abut at any position, thereby preventing the release film 5 from deforming at any position, and thus ensuring the flatness of the release film 5.

[0071] Specifically, the transparent plate 2 is set perpendicular to the axis of the housing 11.

[0072] The second aspect of this utility model also protects a film-stretching mechanism, including a film-stretching assembly 6 and a film-stretching pressure plate assembly as described above; the film-stretching assembly 6 has a clearance space for accommodating a release film 5; after the film-stretching assembly 6 is connected to the connecting part 12, a transparent plate 2 extends into the clearance space, and the transparent plate 2 and the release film 5 are arranged opposite to each other. By setting the mutually cooperating film-stretching assembly 6 and film-stretching pressure plate assembly, the transparent plate 2 in the film-stretching pressure plate assembly and the isolation layer 5 set thereon can press the release film 5 set on the film-stretching assembly 6, which can improve the deformation of the release film 5 after multiple releases and help reduce the release force of the release film 5, and can also improve the bulging problem caused by the photocuring equipment during curing; by setting the isolation layer 3, the transparent plate 2 can also be prevented from being directly attached to the release film 5, which would cause a photoadhesive effect and make it difficult to release, thereby improving the release effect of the release film 5, effectively shortening the liquid leveling time of the photosensitive resin on the release film 5, and improving the working efficiency of the photocuring equipment.

[0073] In some possible embodiments, the film-stretching assembly 6 includes a first film-stretching clamp 61 and a second film-stretching clamp 62 disposed opposite to each other, and a release film 5 disposed between the first film-stretching clamp 61 and the second film-stretching clamp 62; the first film-stretching clamp 61 and the second film-stretching clamp 62 are detachably connected by a first connector; the first film-stretching clamp 61 has a first clearance space, and the second film-stretching clamp 62 has a second clearance space. After the first film-stretching clamp 61 and the second film-stretching clamp 62 are connected, the first clearance space and the second clearance space form a clearance space. By making the first film-stretching clamp 61 and the second film-stretching clamp 62 detachably connected, the installation of the release film 5 can be facilitated and the installation operation can be simplified.

[0074] In this embodiment, the first stretching plate 61 has a first surface and a second surface that are arranged opposite to each other, and the second stretching plate 62 has a third surface and a fourth surface that are arranged opposite to each other. After the first stretching plate 61 is connected to the connecting part 12 of the stretching plate 1, the connecting part 12 abuts against the first surface. One end of the housing 11 with the mounting groove 111 protrudes from the fourth surface. After the release film 5 is fixed between the first stretching plate 61 and the second stretching plate 62, the release film 5 abuts against the second surface and the third surface respectively.

[0075] In this embodiment, the first clearance space is located in the middle region of the first bandage clamp 61, and the second clearance space is located in the middle region of the second bandage clamp 62.

[0076] The installation process of the tensioning plate assembly and tensioning assembly 6 is as follows: The tensioning plate assembly is pressed into the first clearance space and the second clearance space of the tensioning assembly 6 in sequence. After the tensioning plate assembly is pressed into the second clearance space, the tensioning plate assembly immediately abuts against the release film 5. The tensioning plate assembly drives the release film 5 from the position between the first tensioning clamp 61 and the second tensioning clamp 62, moving it away from the first tensioning clamp 61 to the connecting part 12 in the tensioning plate assembly abuts against the first tensioning clamp 61. The connecting part in the tensioning plate assembly is then fixedly connected to the first tensioning clamp 61. At this point, the installation process of the tensioning plate assembly and tensioning assembly 6 is completed.

[0077] The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

[0078] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0079] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A film-stretching plate assembly for use in a photocuring apparatus, the photocuring apparatus comprising a film-stretching assembly (6), the film-stretching assembly (6) having clearance space for accommodating a release film (5), characterized in that, The membrane pressing plate assembly includes a membrane pressing plate (1), a transparent flat plate (2), and an isolation layer (3); The stretching plate (1) is provided with a mounting groove (111) and a connecting part (12) for connecting with the stretching assembly (6). The transparent plate (2) is disposed in the mounting groove (111). When the connecting part (12) is connected with the stretching assembly (6), the transparent plate (2) can extend into the clearance space. The transparent plate (2) is isolated from the release film (5) by the isolation layer (3).

2. The membrane pressing plate assembly according to claim 1, characterized in that, The isolation layer (3) is a colloidal layer; When the connecting part (12) is connected to the film assembly (6), the colloid layer abuts against the release film (5).

3. The membrane pressing plate assembly according to claim 2, characterized in that, The stretching plate (1) includes a housing (11) with openings at both ends and a connecting part (12), wherein the connecting part (12) is disposed on the side of the housing (11) away from the release film (5); The mounting groove (111) is provided on the side of the housing (11) away from the connecting part (12).

4. The membrane pressing plate assembly according to claim 3, characterized in that, The shell (11) is provided with a casting groove for casting the colloidal layer. The casting groove is spaced apart from the transparent plate (2) and is located on the side of the shell (11) facing the release film (5) near the transparent plate (2).

5. The membrane pressing plate assembly according to claim 1, characterized in that, When the connecting part (12) is connected to the film assembly (6), the isolation layer (3) is a sealed isolation cavity formed between the transparent plate (2) and the release film (5).

6. The membrane pressing plate assembly according to claim 5, characterized in that, The membrane pressing plate assembly also includes an air supply device that can form the sealed isolation cavity between the transparent plate (2) and the release film (5).

7. The membrane pressing plate assembly according to claim 6, characterized in that, The gas supply device includes an air inlet and an air outlet, both of which are located between the transparent flat plate (2) and the release film (5) and are connected to the sealed isolation cavity; The air inlet is used to inflate the space between the transparent plate (2) and the release film (5); The vent is used to evacuate the sealed isolation cavity between the transparent plate (2) and the release film (5).

8. The membrane pressing plate assembly according to any one of claims 1-7, characterized in that, The membrane pressing plate assembly also includes a sealing ring (4); The bottom of the mounting groove (111) is provided with an annular fixing groove (113), and part of the sealing ring (4) is disposed in the annular fixing groove (113). The remaining part of the sealing ring (4) protruding from the annular fixing groove (113) abuts against the transparent plate (2).

9. The membrane pressing plate assembly according to claim 8, characterized in that, An annular notch is provided on the edge of the transparent plate (2) away from the isolation layer (3), and the sealing ring (4) is provided in the remaining part of the annular fixing groove (113).

10. The membrane pressing plate assembly according to claim 9, characterized in that, The remaining portion of the sealing ring (4) located within the annular notch abuts against the inner wall of the housing (11) and the side wall of the annular notch on opposite sides.

11. The membrane pressing plate assembly according to any one of claims 1-7, characterized in that, The transparent plate (2), the isolation layer (3) and the release film (5) are arranged in parallel, and the isolation layer (3) is used to cover the area between the transparent plate (2) and the release film (5).

12. The membrane pressing plate assembly according to claim 11, characterized in that, One end of the housing (11) also includes an abutment surface (112) disposed opposite to the connecting portion (12), the abutment surface (112) being disposed around the mounting groove (111).

13. The membrane pressing plate assembly according to claim 12, characterized in that, After the transparent plate (2) is installed in the mounting groove (111), the transparent plate (2) and the mounting groove (111) still form a groove-shaped structure for accommodating the isolation layer (3). The isolation layer (3) is disposed behind the groove-shaped structure, and the side of the isolation layer (3) away from the transparent plate (2) is located on the same plane as the contact surface (112).

14. The membrane pressing plate assembly according to claim 1, characterized in that, The height of the housing (11) is greater than or equal to the height of the membrane assembly (6).

15. A membrane stretching mechanism, characterized in that, Includes the membrane stretching assembly (6) and the membrane stretching plate assembly as described in any one of claims 1-14; The membrane assembly (6) has a clearance space for accommodating the release membrane (5); After the membrane assembly (6) is connected to the connecting part (12), the transparent plate (2) extends into the clearance space, and the isolation layer (3) is placed between the transparent plate (2) and the release film (5).

16. The membrane stretching mechanism according to claim 15, characterized in that, The bandage assembly (6) includes a first bandage clamp (61) and a second bandage clamp (62) disposed opposite to each other, and the release film (5) is disposed between the first bandage clamp (61) and the second bandage clamp (62); The first bandage clamp (61) and the second bandage clamp (62) are detachably connected by a first connector; The first bandage clamp (61) has a first clearance space, and the second bandage clamp (62) has a second clearance space. After the first bandage clamp (61) and the second bandage clamp (62) are connected, the first clearance space and the second clearance space form the clearance space.

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