A light-cured 3D printing flexible self-lubricating release method and device

Abstract

This invention relates to a method and apparatus for flexible self-lubricating release molding in photopolymer 3D printing, comprising the steps of: filling a molding tank with a photopolymerizable liquid material; using a moving platform to adhere a self-lubricating film to the bottom of the molding tank; starting printing; irradiating the photopolymerizable liquid material through the self-lubricating film with a light source, causing the photopolymerizable liquid material to solidify at the bottom of the molding tank to form a printed layer; and filling the top of the self-lubricating film with lubricating fluid. In this invention's flexible self-lubricating release molding method for photopolymer 3D printing, because the lubrication chamber draws out the lubricating fluid filled above the self-lubricating film, a vacuum is created above the self-lubricating film. By adjusting the proportion of lubricating fluid at various points above the self-lubricating film, the deformation direction of the self-lubricating film is guided, and the deformation angle of the self-lubricating film is changed according to the model structure to separate the printed layer.

Description

Technical Field

[0001] This invention relates to the technical field of photopolymer printing demolding, and in particular to a flexible self-lubricating release method and equipment for photopolymer 3D printing. Background Technology

[0002] In top-down printing, the key technical challenge lies in reducing the adhesion between the forming structure and the release film, thereby achieving rapid separation between them. This enables rapid or continuous printing, reduces the impact of gravity on the printed parts, and thus minimizes their fragility and deformability, improving printing accuracy. The main method for reducing adhesion is to transform the solid-solid bond between the forming structure and the release film into a solid-liquid bond. Currently, there are three main methods for achieving solid-liquid bonding in high-speed photopolymerization 3D printing technology: The first is the oxygen-inhibiting film method, which allows oxygen permeability to the release film. This utilizes the principle of oxygen inhibition to create an uncured liquid "dead zone" layer between the molding material and the release film. This curing method requires a high depth of light penetration and is not suitable for materials with shallow curing depths. The second is the self-lubricating film method, which uses a self-lubricating film that releases fluorinated oil or silicone oil to achieve low-adhesion separation between the molded structure and the molded film. However, the lubricant inside the release film is easily consumed, thus degrading the film's performance. The third is the oil film method, which uses fluorinated oil or silicone oil to construct a thick oil film. The photopolymerized liquid is directly above the oil film. Due to the force exerted on the oil film during the lifting of the molding platform, the oil film surface becomes very unstable, thus affecting the molding accuracy.

[0003] In the prior art, a photopolymer 3D printer, patent number CN110126272A, has an overall structure comprising, from top to bottom, a Z-axis motion device 1, a photosensitive resin storage tank 2, a light transmission device 3, and a light-emitting device 4. The 3D printer uses two different wavelengths of ultraviolet light—long and short—to act on the photosensitive resin for photopolymerization. The light-emitting device 4 is located at the lower end of the machine body and is a long-wave ultraviolet light source with a wavelength between 405nm and 420nm. The light transmission device 3 is located at the bottom of the photosensitive resin storage tank 2 and contains a short-wave ultraviolet light source with a wavelength between 345nm and 365nm. The short-wave ultraviolet light forms an inhibition-curing layer between the release film and the photosensitive resin. The long-wave ultraviolet light passes through the light transmission device 3 and the inhibition-curing layer before photopolymerizing the photosensitive resin in the photosensitive resin storage tank 2 for 3D printing. The release film and the printed object are in a discrete state of non-fixed adhesion, and no release film demolding operation is required when the printed object is lifted upward by the Z-axis motion device 1.

[0004] Patent No. CN111347670A discloses a novel demolding mechanism for a photopolymer 3D printer. This mechanism addresses the issues of significantly shortened lifespan of the Z-axis and printing film in existing printers, susceptibility to malfunctions, the need for high coordination between software and demolding actions, and increased hardware control costs. The proposed solution includes an adjustment plate with a left front corner plate, a left rear corner plate, a right rear corner plate, and a right front corner plate fixedly connected to its top. Each of these plates has a motion trajectory groove, within which a cam follower is slidably mounted. Two corresponding cam followers are fixedly connected to the same left-side strip. This solution extends the lifespan of the printer's Z-axis and printing film to a certain extent, eliminates the need for additional electrical control, and significantly reduces the difficulty of software control.

[0005] However, in the actual printing process, the material ratio of each part of the printing layer needs to be determined according to the structure of the model itself. Therefore, in order to improve printing accuracy and quality, it is necessary to solve the demolding process where the material ratio varies in different parts of the printing layer. Summary of the Invention

[0006] The first objective of this invention is to provide a flexible self-lubricating release method for photopolymer 3D printing, which aims to solve the demolding process where the material content varies in different parts of the printed layer.

[0007] To address the aforementioned technical problems, a method for photopolymerization 3D printing of flexible self-lubricating release molding is provided, comprising the following steps:

[0008] S1. Fill the molding tank with the light-curing liquid material;

[0009] S2. The self-lubricating film is adhered to the bottom of the molding groove by moving the platform;

[0010] S3. Start printing. The light source shines through the self-lubricating film onto the photocurable liquid material, so that the photocurable liquid material is cured on the bottom of the molding tank to form a printing layer.

[0011] S4. The self-lubricating film is filled with lubricating liquid. When the photocurable liquid material is cured at the bottom of the molding tank to form a printing layer, the lubricating liquid filled above the self-lubricating film is extracted through the lubrication chamber to create a vacuum above the self-lubricating film.

[0012] S5. The self-lubricating film generates an upper and lower pressure difference, so that the self-lubricating film separates from the printing layer;

[0013] Specifically, by adjusting the content ratio of lubricating liquid at various points above the self-lubricating film, the deformation direction of the self-lubricating film is guided, thereby changing the deformation angle of the self-lubricating film to separate the printed layer.

[0014] Further, the step of filling the self-lubricating film with lubricating liquid includes the following steps: the self-lubricating film is attached to a glass plate, a metal plate is connected to both sides of the self-lubricating film, a light-transmitting plate is formed above the glass plate, the lubricating liquid is filled between the glass plate and the light-transmitting plate, and springs are respectively connected between the metal plate and the light-transmitting plate. When the lubrication chamber draws out the lubricating liquid filled above the self-lubricating film, it drives the metal plate to move toward the light-transmitting plate to create a vacuum above the self-lubricating film.

[0015] Furthermore, driving the metal plates to move toward the light-transmitting plate includes the step of connecting the metal plates on both sides of the self-lubricating film to a first driving source. When the first driving sources on both sides control the metal plates to move at different distances relative to the light-transmitting plate, the content ratio of lubricating liquid at various points above the self-lubricating film is adjusted.

[0016] Furthermore, driving the metal plates to move toward the light-transmitting plate includes the step of providing a first eccentric cam on the moving platform, and having two first eccentric cams respectively abutting against both sides of the glass plate. When the first eccentric cams on both sides control the glass plate to rotate relative to the light-transmitting plate, the content ratio of lubricating liquid at various points above the self-lubricating film is adjusted.

[0017] Further, the step of filling the self-lubricating film with lubricating fluid includes the following steps: the self-lubricating film is adhered to a glass plate, a light-transmitting plate is formed above the glass plate, the lubricating fluid is filled between the glass plate and the light-transmitting plate, one side of the glass plate is elastically hinged to one side of the moving platform, and the other side of the moving platform is provided with a second eccentric cam, which abuts against the other side of the glass plate. When the lubrication chamber draws out the lubricating fluid filled above the self-lubricating film, the second eccentric cam rotates, and an inclination angle is formed between the glass plate and the light-transmitting plate.

[0018] The second objective of this invention is to provide a flexible self-lubricating device for photopolymer 3D printing, which aims to solve the problem of different material proportions in different parts of the printed layer during demolding.

[0019] To address the aforementioned technical problems, a photopolymerization 3D printing flexible self-lubricating device is provided, applicable to the aforementioned photopolymerization 3D printing flexible self-lubricating release method, comprising:

[0020] light source;

[0021] A mobile platform, wherein the light source is connected above the mobile platform;

[0022] A molding tank, located below the moving platform, is used to hold photocurable liquid materials;

[0023] A lubrication module includes a light-transmitting plate, a glass plate, and a self-lubricating film. The light-transmitting plate is connected above the moving platform, the glass plate is movably connected to the moving platform with respect to the light-transmitting plate, the self-lubricating film is attached to the glass plate, and lubricating fluid is filled between the light-transmitting plate and the glass plate.

[0024] The adjustment module includes a lubrication chamber and a separation component. The lubrication chamber is connected to one side of the moving platform and is used to draw out the lubricant between the light-transmitting plate and the glass plate. The separation component is connected to the end of the moving platform and is used to adjust the content ratio of the lubricant between the glass plate and the light-transmitting plate to guide the self-lubricating film to produce directional deformation.

[0025] Furthermore, the separation assembly includes a metal plate, a spring, and a first drive source. The metal plate is connected to both sides of the glass plate, the spring abuts against the metal plate and the light-transmitting plate, and the first drive source is connected to both sides of the moving platform.

[0026] When the lubrication chamber draws out lubricating fluid, the first drive source drives the metal plates on both sides to move toward the light-transmitting plate, so as to create a vacuum above the self-lubricating film, causing the self-lubricating film to deform.

[0027] Furthermore, the separation assembly includes a metal plate, a spring, and a first eccentric cam. The metal plate is connected to both sides of the glass plate, the spring abuts between the metal plate and the light-transmitting plate, and the first eccentric cam is connected to the moving platform, with the two first eccentric cams abutting against both sides of the glass plate respectively.

[0028] When the lubrication chamber draws out lubricating fluid, the first eccentric cam rotates, causing the glass plate to move relative to the light-transmitting plate, thereby creating a vacuum above the self-lubricating film and causing the self-lubricating film to deform.

[0029] Furthermore, the separation component includes an elastic hinge structure and a second eccentric cam. The elastic hinge structure is located on one side of the moving platform, and the second eccentric cam is located on the other side of the moving platform. One side of the glass plate is connected to the elastic hinge structure, and the second eccentric cam abuts against the other side of the glass plate.

[0030] When the lubrication chamber draws out lubricating fluid, the second eccentric cam rotates, causing the glass plate to tilt relative to the light-transmitting plate at an angle, thereby creating a vacuum above the self-lubricating film and causing the self-lubricating film to deform.

[0031] Furthermore, the self-lubricating film is a light-transmitting organic polymer film material with a thickness ranging from 0.05 to 5 mm.

[0032] Implementing the embodiments of the present invention will have the following beneficial effects:

[0033] 1. The photopolymer 3D printing flexible self-lubricating release method in this embodiment involves filling a molding tank with photopolymer liquid material; moving the platform to adhere the self-lubricating film to the bottom of the molding tank; starting printing, and using a light source to irradiate the photopolymer liquid material through the self-lubricating film, causing the photopolymer liquid material to solidify at the bottom of the molding tank to form a printing layer; a lubricating liquid is filled above the self-lubricating film. When the photopolymer liquid material solidifies at the bottom of the molding tank to form a printing layer, the lubricating liquid filled above the self-lubricating film is extracted through a lubrication chamber to create a vacuum above the self-lubricating film; the self-lubricating film generates a pressure difference between the top and bottom, causing the self-lubricating film to separate from the printing layer. By adjusting the content ratio of lubricating liquid at various points above the self-lubricating film, the deformation direction of the self-lubricating film is guided, and the deformation angle of the self-lubricating film is changed according to the model structure to separate the printing layer. This overcomes the problem of poor accuracy and quality after demolding due to different material proportions at various points of the printing layer in the prior art.

[0034] 2. In the photopolymerization 3D printing flexible self-lubricating release method of this embodiment, since the self-lubricating film is attached to the glass plate, the metal plate is connected to both sides of the self-lubricating film, and a light-transmitting plate is formed above the glass plate, the lubricating liquid is filled between the glass plate and the light-transmitting plate, and the springs are respectively connected between the metal plate and the light-transmitting plate. Thus, when the lubrication chamber draws out the lubricating liquid filled above the self-lubricating film, it drives the metal plate to move toward the light-transmitting plate, thereby creating a vacuum above the self-lubricating film.

[0035] 3. In the photopolymerization 3D printing flexible self-lubricating release method of this embodiment, since the metal plates on both sides of the self-lubricating film are respectively connected to the first driving source, when the first driving source on both sides controls the metal plates to move at different distances relative to the light-transmitting plate, the content ratio of lubricating liquid at various places above the self-lubricating film can be adjusted to guide the deformation direction of the self-lubricating film.

[0036] 4. In this embodiment, the photopolymerization 3D printing flexible self-lubricating device includes a lubrication module comprising a light-transmitting plate, a glass plate, and a self-lubricating film. The light-transmitting plate is connected above the moving platform, the glass plate is movably connected to the moving platform with respect to the light-transmitting plate, the self-lubricating film is attached to the glass plate, and lubricating fluid is filled between the light-transmitting plate and the glass plate. The adjustment module includes a lubrication chamber and a separation component. The lubrication chamber is connected to one side of the moving platform and is used to extract or release lubricating fluid between the light-transmitting plate and the glass plate. The separation component is connected to the end of the moving platform and is used to adjust the content ratio of lubricating fluid between the glass plate and the light-transmitting plate, thereby guiding the self-lubricating film to produce directional deformation. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a flowchart of the photopolymerization 3D printing flexible self-lubricating release method described in Embodiment 1 of the present invention;

[0039] Figure 2 This is a first schematic diagram of the photopolymerization 3D printing flexible self-lubricating device according to Embodiment 2 of the present invention;

[0040] Figure 3 This is a first schematic diagram of the photopolymerization 3D printing flexible self-lubricating device according to Embodiment 2 of the present invention.

[0041] Among them: 100, photopolymer 3D printing flexible self-lubricating equipment; 110, light source; 120, moving platform; 130, forming tank; 140, lubrication module; 141, light-transmitting plate; 142, glass plate; 143, self-lubricating film; 150, adjustment module; 151, lubrication chamber; 152, separation component; 1521, metal plate; 1522, spring; 1523, first drive source; 1525, elastic hinge structure; 1526, second eccentric cam. Detailed Implementation

[0042] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0043] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] Example 1

[0046] Please refer to Figures 1-3 Embodiment 1 of the present invention provides a photopolymerization 3D printing flexible self-lubricating release method, including the following steps:

[0047] S1. Fill the molding tank 130 with the light-curing liquid material;

[0048] S2. The self-lubricating film 143 is attached to the bottom of the molding groove 130 by the moving platform 120;

[0049] S3. Start printing. The light source 110 shines on the photocurable liquid material through the self-lubricating film 143, so that the photocurable liquid material is cured on the bottom of the molding tank 130 to form a printing layer.

[0050] S4. The self-lubricating film 143 is filled with lubricating liquid. When the photocurable liquid material is cured at the bottom of the molding tank 130 to form a printing layer, the lubricating liquid filled above the self-lubricating film 143 is extracted through the lubrication chamber 151 to create a vacuum above the self-lubricating film 143.

[0051] S5. The self-lubricating film 143 generates an upper and lower pressure difference to separate the self-lubricating film 143 from the printed layer.

[0052] In this process, by adjusting the content ratio of lubricating liquid at various points above the self-lubricating film, the deformation direction of the self-lubricating film 143 is guided, thereby changing the deformation angle of the self-lubricating film 143 to separate the printing layer. Specifically, a photocurable liquid material, such as a photocurable resin, photocurable ceramic paste, or photocurable metal paste, is filled into the forming tank 130. The moving platform 120 is used to bring the self-lubricating film 143 into contact with the bottom of the forming tank 130. Printing is initiated, and the light source 110 illuminates the photocurable liquid material through the self-lubricating film 143, causing the photocurable liquid material to solidify at the bottom of the forming tank 130, forming the printing layer. Since the self-lubricating film 143 is filled with lubricating liquid, when the photocurable liquid material solidifies at the bottom of the forming tank 130 to form the printing layer, the lubricating liquid filled above the self-lubricating film 143 is extracted through the lubrication chamber 151, thus maintaining the self-lubrication... A vacuum is formed above the film 143; the self-lubricating film 143 deforms due to the pressure difference between the top and bottom, so that the self-lubricating film 143 separates from the printing layer. It is worth noting that in the actual 3D printing process, the specific printing model itself has different structures and needs to conform to the actual printing separation angle. Otherwise, it is easy to cause problems such as cracks or reduced connection strength inside the printed part. Therefore, the content ratio of lubricant in various places above the self-lubricating film is adjusted according to the material used in the printing layer of the printing model, thereby guiding the deformation direction of the self-lubricating film 143. Then, the deformation angle of the self-lubricating film 143 is changed according to the model structure to separate the printing layer, ensuring that the material ratio in various places of the printing layer is different, thereby improving the accuracy and quality after demolding.

[0053] In one possible implementation, filling the self-lubricating film 143 with lubricating fluid includes the steps of: the self-lubricating film 143 being adhered to a glass plate 142; a metal plate 1521 being connected to both sides of the self-lubricating film 143; a light-transmitting plate 141 being formed above the glass plate 142; lubricating fluid being filled between the glass plate 142 and the light-transmitting plate 141; and springs 1522 being connected between the metal plate 1521 and the light-transmitting plate 141. When the lubrication chamber 151 draws out the lubricating fluid filling the self-lubricating film 143, it drives the metal plate 1521 to move toward the light-transmitting plate 141, thereby creating a vacuum above the self-lubricating film 143. In a specific application, the self-lubricating film 143 is attached to the glass plate 142. The lubricating liquid can penetrate between the self-lubricating film 143 and the glass plate 142 through capillary effect. The metal plate 1521 is connected to both sides of the self-lubricating film 143. A light-transmitting plate 141 is formed above the glass plate 142. The lubricating liquid is filled between the glass plate 142 and the light-transmitting plate 141. The spring 1522 is connected between the metal plate 1521 and the light-transmitting plate 141 respectively. So when the lubrication chamber 151 draws out the lubricating liquid filled above the self-lubricating film 143, it drives the metal plate 1521 to move toward the light-transmitting plate 141. At this time, a vacuum is formed above the self-lubricating film 143, the glass plate 142 is in a movable state, and the self-lubricating film 143 undergoes concave deformation. The concave deformation part of the self-lubricating film 143 will separate from the printing layer, thereby completing the demolding process.

[0054] In one possible implementation, driving the metal plates 1521 to move toward the light-transmitting plate 141 includes the step of connecting the metal plates 1521 on both sides of the self-lubricating film 143 to a first driving source 1523. When the first driving sources 1523 on both sides control the metal plates 1521 to move at different distances relative to the light-transmitting plate 141, the content ratio of lubricating liquid at various points above the self-lubricating film is adjusted. In specific applications, the metal plates 1521 on both sides of the self-lubricating film 143 are connected to the first driving source 1523. The first driving source 1523 controls the metal plates 1521 to move at different distances relative to the light-transmitting plate 141 according to the material ratio of the model printing layer, thereby adjusting the content ratio of lubricating liquid at various points above the self-lubricating film, guiding the deformation direction of the self-lubricating film 143, and facilitating the improvement of the accuracy and quality of each printing layer.

[0055] In one possible implementation, driving the metal plate 1521 to move toward the light-transmitting plate 141 includes the following steps: the moving platform 120 is provided with a first eccentric cam (not shown), and two first eccentric cams abut against the two sides of the glass plate 142 respectively. When the first eccentric cams on both sides control the glass plate 142 to rotate relative to the light-transmitting plate 141, the content ratio of lubricant at various points above the self-lubricating film is adjusted. In specific applications, when the rotation angles of the first eccentric cams on both sides are the same, the heights at which the two sides of the glass plate 142 are raised are the same, and the self-lubricating film 143 is symmetrically concave and separated from the printing layer. When the rotation angles of the first eccentric cams on both sides are different, the heights at which the two sides of the glass plate 142 are raised are different, the glass plate 142 tilts, the content ratio of lubricant at various points above the self-lubricating film is different, and the deformation direction of the self-lubricating film 143 is changed to demold the printing layer.

[0056] In one possible implementation, the process of filling the self-lubricating film 143 with lubricating fluid includes the steps of: the self-lubricating film 143 being adhered to a glass plate 142; a light-transmitting plate 141 being formed above the glass plate 142; lubricating fluid being filled between the glass plate 142 and the light-transmitting plate 141; one side of the glass plate 142 being elastically hinged to one side of a moving platform 120; and a second eccentric cam 1526 being provided on the other side of the moving platform 120. The second eccentric cam 1526 abuts against the other side of the glass plate 142. When the lubrication chamber 151 draws out the lubricating fluid filled above the self-lubricating film 143, the second eccentric cam 1526 rotates, and an inclination angle is formed between the glass plate 142 and the light-transmitting plate 141. In a specific application, the self-lubricating film 143 is attached to the glass plate 142, and a light-transmitting plate 141 is formed above the glass plate 142. Lubricating fluid is filled between the glass plate 142 and the light-transmitting plate 141. One side of the glass plate 142 is elastically hinged to one side of the moving platform 120, and the other side of the moving platform 120 is provided with a second eccentric cam 1526. The second eccentric cam 1526 abuts against the other side of the glass plate 142. When the lubrication chamber 151 draws out the lubricating fluid filled above the self-lubricating film 143, the second eccentric cam 1526 rotates, and an inclination angle of 3° is formed between the glass plate 142 and the light-transmitting plate 141, which reduces the rigidity of the self-lubricating film 143. At this time, the self-lubricating film 143 generates an internal and external pressure difference and deforms, creating more gaps between the self-lubricating film 143 and the printing layer for demolding.

[0057] Example 2

[0058] This embodiment differs from the subject matter protected in Embodiment 1, as detailed below:

[0059] Please refer to Figure 2 and Figure 3Embodiment 2 of the present invention provides a photopolymerization 3D printing flexible self-lubricating device 100, applicable to the above-mentioned photopolymerization 3D printing flexible self-lubricating release method, including a light source 110, a moving platform 120, a forming tank 130, a lubrication module 140, and an adjustment module 150; the light source 110 is connected above the moving platform 120; the forming tank 130 is located below the moving platform 120 and is used to hold the photopolymerization liquid material; the lubrication module 140 includes a light-transmitting plate 141, a glass plate 142, and a self-lubricating film 143, the light-transmitting plate 141 is connected above the moving platform 120, the glass plate 142 is connected above the moving platform 120, and the self-lubricating film 143 is connected above the moving platform 120. A 42-spacing light-transmitting plate 141 is movably connected to a moving platform 120. A self-lubricating film 143 is attached to a glass plate 142, and lubricant is filled between the light-transmitting plate 141 and the glass plate 142. The adjustment module 150 includes a lubrication chamber 151 and a separation component 152. The lubrication chamber 151 is connected to one side of the moving platform 120 and is used to extract or release lubricant between the light-transmitting plate 141 and the glass plate 142. The separation component 152 is connected to the end of the moving platform 120 and is used to adjust the content ratio of lubricant between the glass plate 142 and the light-transmitting plate 141 to guide the self-lubricating film 143 to undergo directional deformation. In specific applications, the lubrication module 140 includes a light-transmitting plate 141, a glass plate 142, and a self-lubricating film 143. The light-transmitting plate 141 is connected above the moving platform 120, and the glass plate 142 is movably connected to the moving platform 120 at intervals from the light-transmitting plate 141. The self-lubricating film 143 is attached to the glass plate 142, and lubricant is filled between the light-transmitting plate 141 and the glass plate 142. The adjustment module 150 includes a lubrication chamber 151 and a separation component 152. The lubrication chamber 151 is connected to one side of the moving platform 120 and is used to extract and release lubricant between the light-transmitting plate 141 and the glass plate 142. When a printing layer is completed in the forming tank 130, the lubrication chamber 151 automatically extracts lubricant between the light-transmitting plate 141 and the glass plate 142. The separation component 152 is connected to the end of the moving platform 120 and is used to adjust the content ratio of lubricant between the glass plate 142 and the light-transmitting plate 141, thereby guiding the self-lubricating film 143 to undergo directional deformation, so that the self-lubricating film 143 is demolded from the printing layer.

[0060] In one possible implementation, the separation assembly 152 includes a metal plate 1521, a spring 1522, and a first drive source 1523. The metal plate 1521 is connected to both sides of the glass plate 142, the spring 1522 abuts against the metal plate 1521 and the light-transmitting plate 141, and the first drive source 1523 is connected to both sides of the moving platform 120. When the lubrication chamber 151 draws out lubricating fluid, the first drive source 1523 drives the metal plates 1521 on both sides to move toward the light-transmitting plate 141, so that a vacuum is formed above the self-lubricating film 143, and the self-lubricating film 143 deforms. In specific applications, the separation component 152 includes a metal plate 1521, a spring 1522, and a first driving source 1523. When the lubrication chamber 151 draws out lubricating fluid, the first driving source 1523 drives the metal plates 1521 on both sides to move toward the light-transmitting plate 141. When the metal plates 1521 on both sides move the same distance toward the light-transmitting plate 141, the vacuum ratio above the self-lubricating film 143 is the same, and the self-lubricating film 143 produces a symmetrical concave deformation and separates from the printed layer. When the metal plates 1521 on both sides move the different distances toward the light-transmitting plate 141, the vacuum ratio above the self-lubricating film 143 is different. At this time, the self-lubricating film 143 produces an inclined concave deformation and separates from the printed layer.

[0061] In one possible implementation, the separation assembly 152 includes a metal plate 1521, a spring 1522, and a first eccentric cam. The metal plate 1521 is connected to both sides of the glass plate 142, the spring 1522 abuts against the metal plate 1521 and the light-transmitting plate 141, and the first eccentric cam is connected to the moving platform 120, with two first eccentric cams abutting against both sides of the glass plate 142 respectively. When the lubrication chamber 151 draws out lubricating fluid, the first eccentric cams on both sides rotate, causing the glass plate 142 to move relative to the light-transmitting plate 141, thereby creating a vacuum above the self-lubricating film 143, which then deforms. In specific applications, the separation component 152 includes a metal plate 1521, a spring 1522, and a first eccentric cam. When the lubrication chamber 151 draws out lubricating fluid, the eccentric cams on both sides rotate, causing the glass plate 142 to move relative to the light-transmitting plate 141. When the metal plates 1521 on both sides move the same distance toward the light-transmitting plate 141, the vacuum ratio above the self-lubricating film 143 is the same, and the self-lubricating film 143 undergoes symmetrical concave deformation and separates from the printed layer. When the metal plates 1521 on both sides move the different distances toward the light-transmitting plate 141, the vacuum ratio above the self-lubricating film 143 is different. At this time, the self-lubricating film 143 undergoes tilted concave deformation and separates from the printed layer.

[0062] In one possible implementation, the separation assembly 152 includes an elastic hinge structure 1525 and a second eccentric cam 1526. The elastic hinge structure 1525 is located on one side of the moving platform 120, and the second eccentric cam 1526 is located on the other side of the moving platform 120. One side of the glass plate 142 is connected to the elastic hinge structure 1525, and the second eccentric cam 1526 abuts against the other side of the glass plate 142. When the lubrication chamber 151 draws out lubricating fluid, the second eccentric cam 1526 rotates, causing the glass plate 142 to form an inclined angle relative to the light-transmitting plate 141, so that a vacuum is formed above the self-lubricating film 143, and the self-lubricating film 143 deforms. In specific applications, the separation component 152 includes an elastic hinge structure 1525 and a second eccentric cam 1526. When the lubrication chamber 151 draws out the lubricant, the second eccentric cam 1526 rotates and drives the glass plate 142 to form an inclined angle of 3° relative to the light-transmitting plate 141, which reduces the rigidity of the self-lubricating film 143. At this time, the self-lubricating film 143 produces an inclined concave deformation and separates from the printed layer.

[0063] In one possible implementation, the self-lubricating film 143 is a light-transmitting organic polymer film material with a thickness ranging from 0.05 to 5 mm. In specific applications, the self-lubricating film 143 has no internal porous structure or contains micropores of 5-200 μm. The lubricant in the self-lubricating film 143 is fluorinated oil, silicone oil, or a wax-containing lubricant. The affinity between the lubricant and the self-lubricating film 143 is greater than the affinity between the photocurable liquid material and the self-lubricating film 143. The light-transmitting plate 141 is made of silicon dioxide, plexiglass, polymethyl methacrylate, or high-molecular-weight polyethylene.

[0064] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A photopolymerization 3D printing flexible self-lubricating device, characterized in that, include: light source; A mobile platform, wherein the light source is connected above the mobile platform; A molding tank, located below the moving platform, is used to hold photocurable liquid materials; A lubrication module includes a light-transmitting plate, a glass plate, and a self-lubricating film. The light-transmitting plate is connected above the moving platform, the glass plate is movably connected to the moving platform with respect to the light-transmitting plate, the self-lubricating film is attached to the glass plate, and lubricating fluid is filled between the light-transmitting plate and the glass plate. An adjustment module is included, comprising a lubrication chamber and a separation component. The lubrication chamber is connected to one side of the moving platform and is used to draw out lubricating fluid between the light-transmitting plate and the glass plate. The separation component is connected to the end of the moving platform and is used to adjust the content ratio of lubricating fluid between the glass plate and the light-transmitting plate to guide the self-lubricating film to produce directional deformation. The separation assembly includes a metal plate, a spring, and a first drive source. The metal plate is connected to both sides of the glass plate, the spring abuts against the metal plate and the light-transmitting plate, and the first drive source is connected to both sides of the moving platform. When the lubrication chamber draws out lubricating fluid, the first drive source drives the metal plates on both sides to move toward the light-transmitting plate, so as to create a vacuum above the self-lubricating film, causing the self-lubricating film to deform. Alternatively, the separation assembly includes a metal plate, a spring, and a first eccentric cam. The metal plate is connected to both sides of the glass plate, the spring abuts between the metal plate and the light-transmitting plate, the first eccentric cam is connected to the moving platform, and the two first eccentric cams abut against both sides of the glass plate respectively. When the lubrication chamber draws out lubricating fluid, the first eccentric cams on both sides rotate and drive the glass plate to move relative to the light-transmitting plate, so that a vacuum is formed above the self-lubricating film, and the self-lubricating film deforms. Alternatively, the separation assembly includes an elastic hinge structure and a second eccentric cam, the elastic hinge structure being disposed on one side of the moving platform, the second eccentric cam being disposed on the other side of the moving platform, one side of the glass plate being connected to the elastic hinge structure, and the second eccentric cam abutting against the other side of the glass plate; When the lubrication chamber draws out lubricating fluid, the second eccentric cam rotates, causing the glass plate to tilt relative to the light-transmitting plate at an angle, thereby creating a vacuum above the self-lubricating film and causing the self-lubricating film to deform.

2. The photopolymerization 3D printing flexible self-lubricating device according to claim 1, characterized in that, The self-lubricating film is a light-transmitting organic polymer film material with a thickness ranging from 0.05 to 5 mm.

3. A photopolymerization 3D printing flexible self-lubricating release method, characterized in that, The application of the photopolymerization 3D printing flexible self-lubricating device according to any one of claims 1 or 2 includes the following steps: S1. Fill the molding tank with the light-curing liquid material; S2. The self-lubricating film is adhered to the bottom of the molding groove by moving the platform; S3. Start printing. The light source shines through the self-lubricating film onto the photocurable liquid material, so that the photocurable liquid material is cured on the bottom of the molding tank to form a printing layer. S4. The self-lubricating film is filled with lubricating liquid. When the photocurable liquid material is cured at the bottom of the molding tank to form a printing layer, the lubricating liquid filled above the self-lubricating film is extracted through the lubrication chamber to create a vacuum above the self-lubricating film. S5. The self-lubricating film generates an upper and lower pressure difference, so that the self-lubricating film separates from the printing layer; Specifically, based on the materials used in the printing layer of the printing model itself, the content ratio of lubricating liquid at various locations above the self-lubricating film is adjusted to guide the deformation direction of the self-lubricating film, thereby changing the deformation angle of the self-lubricating film to separate the printing layer.

4. The photopolymerization 3D printing flexible self-lubricating release method according to claim 3, characterized in that, The process of filling the self-lubricating film with lubricating fluid includes the following steps: the self-lubricating film is attached to a glass plate, metal plates are connected to both sides of the self-lubricating film, a light-transmitting plate is formed above the glass plate, lubricating fluid is filled between the glass plate and the light-transmitting plate, and springs are respectively connected between the metal plate and the light-transmitting plate. When the lubrication chamber draws out the lubricating fluid filled above the self-lubricating film, it drives the metal plates to move toward the light-transmitting plate, thereby creating a vacuum above the self-lubricating film.

5. The photopolymerization 3D printing flexible self-lubricating release method according to claim 4, characterized in that, The step of driving the metal plates to move toward the light-transmitting plate includes the following steps: the metal plates on both sides of the self-lubricating film are respectively connected to a first driving source. When the first driving source on both sides controls the metal plates to move at different distances relative to the light-transmitting plate, the content ratio of lubricating liquid at various points above the self-lubricating film is adjusted.

6. The photopolymerization 3D printing flexible self-lubricating release method according to claim 4, characterized in that, The steps of driving the metal plates toward the light-transmitting plate include: the moving platform is provided with a first eccentric cam, and two first eccentric cams abut against the two sides of the glass plate respectively; when the first eccentric cams on both sides control the glass plate to rotate relative to the light-transmitting plate, the content ratio of lubricating liquid at various points above the self-lubricating film is adjusted.

7. The photopolymerization 3D printing flexible self-lubricating release method according to claim 3, characterized in that, The process of filling the self-lubricating film with lubricating fluid includes the following steps: the self-lubricating film is adhered to a glass plate, a light-transmitting plate is formed above the glass plate, the lubricating fluid is filled between the glass plate and the light-transmitting plate, one side of the glass plate is elastically hinged to one side of the moving platform, and the other side of the moving platform is provided with a second eccentric cam, which abuts against the other side of the glass plate. When the lubrication chamber draws out the lubricating fluid filled above the self-lubricating film, the second eccentric cam rotates, and an inclination angle is formed between the glass plate and the light-transmitting plate.

Images