Light source integrated structure

Abstract

The utility model relates to the technical field of 3D printing, in particular to a light source integrated structure which comprises a printing platform, a resin groove module and a light source module with a screen. According to the light source integrated structure provided by the utility model, the stripping film is directly attached to the first light-transmitting supporting plate, the first preset gap is kept between the first light-transmitting supporting plate and the inner bottom surface of the resin groove body structure, and the second preset gap is kept between the stripping film and the screen, so that the stripping film can be prevented from being in direct contact with the screen; the structure is simple, the release film is convenient to replace, a screen can be prevented from being polluted when the stripping film is replaced, the screen can be prevented from being crushed when the stripping film is replaced, and then the purpose of protecting the screen is achieved; the resin tank module and the light source module are detachably connected to the printing platform, so that disassembly, assembly and operation are convenient; through the arrangement of the extinction layer, the curing interference of light scattering on the photocuring material during the projection period can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to an integrated light source structure. Background Technique

[0002] The resin stereolithography technology is one of the main technical methods of today's 3D printing technology, which has the characteristics of fast speed, high efficiency and high precision. At present, there are mainly three ultraviolet curing imaging technologies in this technology, namely laser technology, DLP projection technology and LCD display technology. And there are only two curing platform solutions relied on by these three imaging technologies. The first one: the up-projection method + the model descent natural horizontal film-forming technology; the second one: the down-projection + the mold lifting release film forming technology.

[0003] The first method projects the pattern onto the natural horizontal plane of the resin liquid and cures it on the model attachment surface in the resin liquid. The model attachment surface moves downward to continue forming the next layer of the model. This method has extremely strict requirements for equipment and environment, so the application market is very small.

[0004] The second method controls the distance between the model attachment surface and the release film, and forms a projection surface composed of a layer of resin liquid therebetween. The pattern is projected downward through the transparent release film to cure the resin on the projection surface. The model attachment surface moves upward to peel the cured resin from the release film, and controls the distance between the cured plane and the centrifugal film, thereby forming a new projection surface and continuing the curing of the next layer of the model. This method is widely applied because of its simple control and low requirements for equipment and use environment.

[0005] For the existing down-projection + mold lifting release film forming technology, for example: the Chinese patent with the application number CN201921408370.3 discloses a resin tank, which adopts a detachable resin tank structure to realize the replacement of the release film. When the release film is damaged during printing, only the release film needs to be replaced separately, avoiding the problem of replacing the entire resin tank; at the same time, a preset gap is set between the release film and the light-transmitting plate to enable the release film to have a deformation space, making the peeling operation easier to perform, thereby improving the peeling efficiency and printing success rate.

[0006] However, the above-disclosed resin tank structure has some deficiencies. For example, the release film is tensioned and arranged above the light-transmitting plate, and a preset gap is maintained between the release film and the upper surface of the light-transmitting plate to facilitate the peeling operation. However, a tensioning device for fixing the release film and adjusting the tension of the release film needs to be added, and the structure is complex. In addition, when replacing the release film, since the tensioning device and the frame body are connected by a screw fastening method, it is not convenient to disassemble and replace the release film, and the practicability is poor.

[0007] Therefore, the utility model provides an integrated light source structure. Content of the Utility Model

[0008] Based on this, it is necessary to provide an integrated light source structure for the above technical problems.

[0009] In order to achieve the above object, the technical solution of the present utility model is as follows:

[0010] The integrated light source structure includes a printing platform, a resin tank module, and a light source module with a screen. The resin tank module and the light source module are both detachably connected to the printing platform, and the resin tank module and the light source module are arranged on the printing platform in sequence from top to bottom. The resin tank module includes a resin tank body structure, a first light-transmitting support plate embedded inside the resin tank body structure, and a release film attached to the upper surface of the first light-transmitting support plate. A first preset gap is maintained between the lower surface of the first light-transmitting support plate and the inner bottom surface of the resin tank body structure, and a second preset gap is maintained between the release film and the upper surface of the screen.

[0011] Further, the printing platform includes a base, a rectangular installation groove is opened in the middle of the base, the inner side of the installation groove is stepped, and the step includes a first step wall, a second step wall, and a first step surface for connecting the first step wall and the second step wall. A plurality of first through holes for installing the light source module are opened on the first step surface.

[0012] Further, the light source module includes a mounting seat and a light source fixedly installed on the mounting seat. A rectangular ring-shaped boss is provided at the upper end of the mounting seat. The outer side surface of the boss abuts against the first step wall and its bottom surface abuts against the first step surface. Second through holes are opened on the boss corresponding to the positions of the first through holes.

[0013] Further, the inner side of the boss is stepped, and the step includes a third step wall, a fourth step wall, and a second step surface for connecting the third step wall and the fourth step wall. A second light-transmitting support plate is provided on the second step surface, and the outer side surface of the second light-transmitting support plate abuts against the third step wall and its bottom surface abuts against the second step surface. The screen is fixedly installed on the second light-transmitting support plate.

[0014] Further, an extinction layer for preventing light scattering is provided on the third step wall.

[0015] Further, the extinction layer is a black extinction film adhered to the surface of the third step wall.

[0016] Further, a third through hole is opened on the resin tank body structure corresponding to the position of the second through hole.

[0017] Further, the second light-transmitting support plate and the first light-transmitting support plate are glass plates.

[0018] Further, a first preset gap between the lower surface of the first light-transmitting support plate and the inner bottom surface of the resin tank structure is 1 mm.

[0019] Further, a second preset gap between the release film and the upper surface of the screen is 5 - 8 mm.

[0020] The advantages and beneficial effects of the present utility model are as follows: The integrated light source structure provided by the present utility model can avoid direct contact between the release film and the screen by directly attaching the release film to the first light-transmitting support plate, maintaining a first preset gap between the first light-transmitting support plate and the inner bottom surface of the resin tank structure, and maintaining a second preset gap between the release film and the screen. The structure is simple and convenient for replacing the release film. It can not only avoid contaminating the screen when replacing the release film, but also prevent crushing the screen when replacing the release film, thus achieving the purpose of protecting the screen; By detachably connecting both the resin tank module and the light source module to the printing platform, it is convenient for disassembly and assembly and easy to operate; By providing a light extinction layer, it can effectively reduce the curing interference of the light-curing material caused by light scattering during projection. Description of the Drawings

[0021] Figure 1 It is a perspective view of the integrated light source structure in an embodiment of the present utility model.

[0022] Figure 2 It is a schematic structural diagram of the integrated light source structure in an embodiment of the present utility model.

[0023] Figure 3 It is a schematic structural diagram of the printing platform in an embodiment of the present utility model.

[0024] Reference Numerals: Base 1, Resin Tank Structure 2, Release Film 3, Third Through-Hole 4, First Light-Transmitting Support Plate 5, Screen 6, Second Light-Transmitting Support Plate 7, Inner Bottom Surface of Resin Tank Structure 8, Light Extinction Layer 9, Mounting Seat 10, Light Source 11, First Through-Hole 12, Second Through-Hole 13, Boss 14, First Step Wall 15, Second Step Wall 16, First Step Surface 17. Detailed Embodiment

[0025] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application. And without conflict, the features in the following embodiments and the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope protected by the present application.

[0026] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0027] Refer to the attached Figures 1-3 , in this embodiment, an integrated light source structure is provided, including a printing platform, a resin tank module, and a light source module with a screen 6. The resin tank module and the light source module are both detachably connected to the printing platform, and the resin tank module and the light source module are arranged on the printing platform in sequence from top to bottom.

[0028] In this embodiment, the printing platform involved in the present utility model is composed of a base 1. Among them, a rectangular installation groove is opened in the middle of the base 1, and the inner side of the installation groove is in a stepped shape. The step includes a first step wall 15, a second step wall 16, and a first step surface 17 for connecting the first step wall 15 and the second step wall 16. A plurality of first through holes 12 for installing the light source module are opened on the first step surface 17.

[0029] In this embodiment, by setting the inner side of the installation groove in a stepped shape, it is convenient to install the light source module. Through the first through holes 12 on the first step surface 17, the second through holes 13 on the boss 14, and the third through holes 4 on the resin tank body structure 2, and in cooperation with the use of bolts, the resin tank module and the light source module can be fixedly installed on the base 1, which is convenient for disassembly and assembly and easy to operate.

[0030] In this embodiment, the light source module includes a mounting seat 10 and a light source 11 fixedly installed on the mounting seat 10. A rectangular ring-shaped boss 14 is provided at the upper end of the mounting seat 10. The outer side surface of the boss 14 abuts against the first step wall 15 and its bottom surface abuts against the first step surface 17. Second through holes 13 are opened at positions corresponding to the first through holes 12 on the boss 14; the inner side of the boss 14 is in a stepped shape. The step includes a third step wall, a fourth step wall, and a second step surface for connecting the third step wall and the fourth step wall. A second light-transmitting support plate 7 is provided on the second step surface, and the outer side surface of the second light-transmitting support plate 7 abuts against the third step wall and its bottom surface abuts against the second step surface. The screen 6 is fixedly installed on the second light-transmitting support plate 7.

[0031] In this embodiment, by setting the inner side of the boss 14 in a stepped shape, it is convenient to install the second light-transmitting support plate 7 with the screen 6. The second light-transmitting support plate 7 is a flat plate with a certain rigidity, such as a glass plate, an acrylic plate, etc., which can be flexibly selected according to actual production applications and will not be limited here, and is used to achieve the purpose of supporting and protecting the screen 6.

[0032] In this embodiment, an extinction layer 9 for avoiding light scattering is provided on the third stepped wall; the extinction layer 9 is a black extinction film adhered to the surface of the third stepped wall.

[0033] In this embodiment, in order to effectively reduce the curing interference of the photocuring material due to light scattering during projection, a layer of black extinction film can be adhered to the third stepped wall. The black extinction film includes, but is not limited to, an extinction polyimide film, a PET polyester light-shielding film, etc., which can be flexibly selected according to actual production conditions and will not be limited here.

[0034] In this embodiment, the resin tank module includes a resin tank body structure 2, a first light-transmitting support plate 5 embedded inside the resin tank body structure 2, and a release film 3 attached to the upper surface of the first light-transmitting support plate 5. A first preset gap is maintained between the lower surface of the first light-transmitting support plate 5 and the inner bottom surface 8 of the resin tank body structure, and a second preset gap is maintained between the release film 3 and the upper surface of the screen 6.

[0035] In this embodiment, the first light-transmitting support plate 5 is embedded inside the resin tank body structure 2, and the release film 3 is fixed on the first light-transmitting support plate 5. The two form a bottom plane. Using this bottom plane and the inner wall of the resin tank body structure 2 together to form a closed space, by filling a photocuring material (such as photocuring resin) in this closed space, the light projected from the light source 11 to the screen 6 passes through the first light-transmitting support plate 5 and the release film in sequence and then acts on the photocuring material, so that the photocuring material corresponding to the image shape is cured to obtain a patterned cured layer; in addition, the first light-transmitting support plate 5 and the second light-transmitting support plate 7 are made of the same material, and can both be, for example, a glass plate, an acrylic plate, etc., which can be flexibly selected according to actual production applications and will not be limited here, and is used to achieve the purpose of supporting the release film 3.

[0036] In this embodiment, a third through hole 4 is provided at the position of the resin tank body structure 2 corresponding to the second through hole 13.

[0037] In this embodiment, by providing the third through hole 4, after placing the mounting seat 10 of the light source module in the mounting groove, it is convenient to place the resin tank body structure 2 on the light source module. With the use of bolts, it is convenient to fixedly install the resin tank module and the light source module on the base 1, which is convenient for disassembly and assembly and easy to operate.

[0038] In this embodiment, the first preset gap between the lower surface of the first light-transmitting support plate 5 and the inner bottom surface 8 of the resin tank structure is 1 mm; the second preset gap between the release film 3 and the upper surface of the screen 6 is 5 - 8 mm.

[0039] In this embodiment, by inlaying the first light-transmitting support plate 5 inside the resin tank structure 2, attaching the release film 3 on the first light-transmitting support plate 5, and leaving a spacing of about 1 mm between the first light-transmitting support plate 5 and the inner bottom surface 8 of the resin tank structure 2, when the resin tank structure 2 is arranged above the screen 6, a spacing of 5 - 8 mm is left between the release film 3 and the screen 6, which can avoid direct contact between the release film 3 and the screen 6. The structure is simple and convenient for replacing the release film. It can not only avoid contaminating the screen 6 when replacing the release film 3, but also prevent the screen 6 from being crushed when replacing the release film 3, thus achieving the purpose of protecting the screen 6.

[0040] In this embodiment, the present light source integrated structure is used in bottom-exposure 3D printing equipment, such as a bottom-exposure DLP (Digital Light Procession) device, or it can also be an SLA (Stereo lithography Apparatus) device with bottom scanning. In other words, the light source of the present light source integrated structure is located at the bottom surface of the container (also called the resin tank in some application scenarios) and irradiates or laser scans the transparent bottom surface of the container, and is used to irradiate the image in the 3D object model onto the printing reference surface to cure the photocurable material into a corresponding patterned cured layer.

[0041] The working principle of the present utility model is as follows: First, the light source module and the resin tank module are integrally assembled. Then, after placing the mounting seat 10 of the light source module in the mounting groove, the second light-transmitting support plate 7 with the screen 6 is placed in the boss 14. Subsequently, the resin tank module is placed on the boss 14 of the light source module. With the combined action of the first through hole 12, the second through hole 13, the third through hole 4 and the bolts, it is convenient to fixedly install the resin tank module and the light source module on the base 1, which is convenient for disassembly and assembly and easy to operate. By connecting the light source 11 to an external controller and using the controller to control the light source 11 to project light onto the screen 6, the light passes through the first light-transmitting support plate 5 and the release film in sequence and then acts on the photocurable material, so that the photocurable material corresponding to the image shape is cured to obtain a patterned cured layer. During the projection process, in order to reduce the curing interference of the photocurable material due to light scattering during projection, a layer of black light-absorbing film is adhered to the third step wall. Subsequently, the cured resin is peeled off from the release film 3, and the next layer of the model is cured.

[0042] The above content is a further detailed description of the present utility model in combination with specific implementation manners. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. Integrated light source structure, characterized in that, It includes a printing platform, a resin tank module, and a light source module with a screen. The resin tank module and the light source module are both detachably connected to the printing platform, and the resin tank module and the light source module are arranged on the printing platform in sequence from top to bottom. The resin tank module includes a resin tank body structure, a first light-transmitting support plate embedded inside the resin tank body structure, and a release film attached to the upper surface of the first light-transmitting support plate. A first preset gap is maintained between the lower surface of the first light-transmitting support plate and the inner bottom surface of the resin tank body structure, and a second preset gap is maintained between the release film and the upper surface of the screen.

2. The integrated light source structure according to claim 1, characterized in that The printing platform includes a base, and a rectangular installation groove is formed in the middle of the base. The inner side of the installation groove is stepped, and the step includes a first step wall, a second step wall, and a first step surface for connecting the first step wall and the second step wall. A plurality of first through holes for installing the light source module are formed on the first step surface.

3. The integrated light source structure according to claim 2, wherein The light source module includes a mounting seat and a light source fixedly installed on the mounting seat. A rectangular ring-shaped boss is provided at the upper end of the mounting seat. The outer side surface of the boss abuts against the first step wall and its bottom surface abuts against the first step surface. Second through holes are formed in the boss corresponding to the positions of the first through holes.

4. The integrated light source structure according to claim 3, wherein, The inner side of the boss is stepped, and the step includes a third step wall, a fourth step wall, and a second step surface for connecting the third step wall and the fourth step wall. A second light-transmitting support plate is provided on the second step surface, and the outer side surface of the second light-transmitting support plate abuts against the third step wall and its bottom surface abuts against the second step surface. The screen is fixedly installed on the second light-transmitting support plate.

5. The integrated light source structure according to claim 4, wherein, An extinction layer for preventing light scattering is provided on the third step wall.

6. The integrated light source structure according to claim 5, characterized in that, The extinction layer is a black extinction film adhered to the surface of the third step wall.

7. The integrated light source structure according to claim 3, characterized in that, A third through hole is formed in the resin tank body structure corresponding to the position of the second through hole.

8. The integrated light source structure according to claim 4, wherein The second light-transmitting support plate and the first light-transmitting support plate are glass plates.

9. The integrated light source structure according to claim 1, characterized in that, The first preset gap between the lower surface of the first light-transmitting support plate and the inner bottom surface of the resin tank body structure is 1 mm.

10. The integrated light source structure according to claim 1, characterized in that, The second preset gap between the release film and the upper surface of the screen is 5 - 8 mm.

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