Photocuring 3D printing forming device

Abstract

The utility model relates to the technical field of 3D printing, and discloses a photocuring 3D printing forming device which comprises a resin solution pool. The printing substrate mechanism comprises a substrate main body and a substrate lifting mechanism; the scraper mechanism comprises a scraper main body, a scraper push-out mechanism and a scraper lifting mechanism; the ultraviolet irradiation mechanism comprises an ultraviolet irradiation lamp, and the ultraviolet irradiation lamp is used for providing ultraviolet light with specific wavelength for the resin solution; the light ray control mechanism comprises a light ray control board, and the light ray control board is used for directionally adjusting, focusing and uniformly distributing the ultraviolet light emitted by the ultraviolet irradiation lamp. The photocuring 3D printing device is applied to photocuring 3D printing forming, the material utilization rate is high, the material cost is low, the printing precision and the printing efficiency are high, and the post-treatment process can be simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing technical field more specifically, relate to a kind of light-cured 3D printing forming device. BACKGROUND

[0002] The principle of light-cured 3D printing technology is to selectively cure photosensitive resin using ultraviolet light under the control of digital signals. The cured resin accumulates layer by layer until a complete 3D device is formed. This technology has the advantages of fast printing speed, low energy consumption, high device precision, and the ability to produce complex devices that cannot be processed by traditional processes.

[0003] A current light-cured 3D printing technology solution involves immersing a printing substrate in a resin solution and moving the substrate to the bottom of the solution. The container holding the solution has a transparent bottom, and below it is a UV generator. The UV light source shines upwards, and the shape of the UV light source is controlled to solidify the shape of the layer on the substrate. The resulting model is inverted on the substrate. However, this method has drawbacks. Firstly, when the solution is a mixture of resin and metal powder, the metal powder may deposit, causing a layer of metal powder to separate the substrate from the transparent screen, leading to printing failure. Secondly, the printing structure stability is a problem. Inverted printing means that part of the model structure is suspended or inverted during printing, which increases the instability of the printing process. Due to gravity, the suspended part may sag or deform, leading to a decrease in printing quality. If stability is to be increased, the demand for support structures will also increase, which not only increases the printing time and material cost but also increases the difficulty of removing the support structures in the post-processing stage.

[0004] In addition, the existing light-cured 3D printing technology also has the following shortcomings: 1. Low material utilization rate: In the process of traditional light-cured 3D printing technology, a lot of excess resin is often left. These resins cannot be reused after curing and can only be treated as waste, which not only wastes material resources but also may have a negative impact on the environment. 2. Printing precision is limited: Since light-cured 3D printing uses a layer-by-layer scanning and curing method, the boundaries between layers may not be clear enough, resulting in limitations in detail and precision of the printed object. In addition, layer-by-layer curing may also cause the object surface to appear uneven or wavy, further affecting the printing precision. 3. Relatively low printing efficiency: The layer-by-layer scanning and curing method makes the overall speed of light-cured 3D printing relatively slow, especially for large or complex models, the printing time may be several hours or even several days. This low efficiency not only limits the application of light-cured 3D printing in rapid manufacturing, but also increases production costs and delays delivery time. 4. High cost of equipment: The traditional light-cured 3D printing equipment usually contains high-precision laser scanners and other complex components, the manufacturing and maintenance cost of which is relatively high. Therefore, the overall price of light-cured 3D printing equipment is also relatively high, making it difficult for many enterprises and individuals to afford. 5. Complicated post-processing process: After light-cured 3D printing is completed, support structures need to be removed, uncured resin needs to be cleaned, and additional curing treatment needs to be performed. These post-processing steps not only increase the complexity of the operation, but also may cause damage or deformation to the printed object.

[0005] Therefore, it is necessary to provide a light-cured 3D printing forming device to solve the problems in the prior art. Invention content

[0006] Therefore, the utility model provides a light-cured 3D printing forming device, which solves the problems in the prior art.

[0007] A light-cured 3D printing forming device, comprising:

[0008] A resin solution pool;

[0009] A printing substrate mechanism, comprising a substrate main body and a substrate lifting mechanism, the substrate main body is horizontally placed in the resin solution pool; the substrate lifting mechanism is fixed in the resin solution pool and is a ball screw type structure, used to control the lifting of the substrate main body;

[0010] The squeegee mechanism comprises a squeegee body, a squeegee pushing mechanism and a squeegee lifting mechanism. The outer end of the telescopic arm of the squeegee pushing mechanism is connected to the squeegee body. The mechanism body controlling the telescopic arm is installed on the squeegee lifting mechanism. The squeegee lifting mechanism is connected to the outer pool body of the resin solution pool and is a ball screw type structure to control the squeegee pushing mechanism and the squeegee body to lift together.

[0011] The ultraviolet irradiation mechanism comprises an ultraviolet irradiation lamp for providing specific wavelength ultraviolet light to the resin solution.

[0012] The light control mechanism comprises a light control board for directional adjustment, focusing and uniform distribution of the ultraviolet light emitted by the ultraviolet irradiation lamp.

[0013] Preferably, the resin solution pool is made of transparent or translucent material.

[0014] Preferably, the substrate lifting mechanism has two groups and is arranged on both sides of the substrate body. Each substrate lifting mechanism comprises a first servo motor installed on the inner bottom surface of the resin solution pool. The output shaft of the first servo motor is connected to the lower end of the first ball screw. The middle threaded section of the first ball screw is provided with a first screw nut. The first screw nut is connected to the corresponding side of the substrate body. The substrate body is guided to lift by the guide groove arranged on the inner wall of the resin solution pool. The two first servo motors are controlled by the substrate lifting controller arranged outside the resin solution pool to open and close synchronously.

[0015] Preferably, the first ball screw is provided with a first ball screw limiter at the upper and lower positions.

[0016] Preferably, the squeegee pushing mechanism comprises multi-stage telescopic arms, multi-stage telescopic hydraulic cylinders and a control switch. Each telescopic hydraulic cylinder is used to drive the corresponding telescopic arm to extend and retract. The telescopic arm of the previous stage is connected to the telescopic hydraulic cylinder of the next stage. The outer end of the last telescopic arm is connected to the squeegee body. The control switch is installed in the mechanism body on the front side of the first telescopic hydraulic cylinder and is electrically connected to each telescopic hydraulic cylinder.

[0017] Preferably, the squeegee lifting mechanism comprises a second servo motor installed in the squeegee lifting box. The output shaft of the second servo motor is connected to the lower end of the second ball screw. The middle threaded section of the second ball screw is provided with a second screw nut. The second screw nut is connected to the mechanism body of the squeegee pushing mechanism. The mechanism body is guided to lift by the guide hole arranged on the squeegee lifting box. The squeegee lifting controller is arranged outside the squeegee lifting box to control the second servo motor.

[0018] Preferably, the second ball screw is provided with a second ball screw position limiter at the upper and lower positions respectively.

[0019] Preferably, the second ball screw is provided with a second ball screw position limiter at the upper and lower positions respectively.

[0020] Preferably, the light control board is provided with a plurality of light transmission units, and each light transmission unit is provided with a light shielding unit, and the ultraviolet light can pass through the light transmission unit only when the light shielding unit on the light transmission unit is opened, and the light shielding unit is controlled by a light transmission controller arranged on one side of the light control board.

[0021] The present application forms each light curing layer by using the scraping-shading-light curing mode through automatic control. Scraping refers to that after the light-sensitive resin or metal resin mixed solution is dropped from the nozzle and adhered on the printing substrate, the scraper main body is accurately controlled to be lifted by a certain distance, and then the substrate body is swept, leaving a layer thickness that can be cured; shading refers to that the light control board is controlled to cover the substrate body, and the uncovered part is the single layer shape after the model slicing; light curing refers to that after the shading is completed, the ultraviolet irradiation lamp is turned on to cure the solution of this layer.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] (1) High material utilization rate and cost control

[0024] Reduce material waste:

[0025] The present application can ensure that each layer only leaves a light-sensitive resin layer thickness that can be cured by accurately controlling the scraper main body and the substrate body, thereby reducing material waste. In comparison, the traditional light curing 3D printing technology may need to remove excess resin after each layer is cured, resulting in certain material waste.

[0026] Reduce cost:

[0027] Due to the high material utilization rate, the present application is expected to reduce the overall material cost in the long run. At the same time, since the device of the present application may simplify some complex components (such as high-precision laser scanners) in traditional light curing 3D printing, it is also possible to reduce the manufacturing cost of the equipment.

[0028] (2) Improve printing accuracy and efficiency

[0029] Improve printing accuracy:

[0030] The precise control of the squeegee body and the substrate body helps to form a more uniform and precise layer thickness, thereby improving the printing accuracy. The present application can also reduce deformation and errors during the curing process by optimizing the curing process.

[0031] Improving printing efficiency:

[0032] Compared to the layer-by-layer scanning and curing method in traditional light-curing 3D printing, the present application can reduce the time required for each layer curing through the squeeze-shield-cure method. This efficiency improvement can be more obvious when printing large or complex models.

[0033] (3) Simplifying the post-processing process

[0034] Reducing support structure requirements:

[0035] As the present application can accurately control the shape and thickness of each layer, it can reduce the dependence on traditional support structures. This helps to simplify the post-processing process and reduce the time and effort required to remove the support structure.

[0036] Simplifying the cleaning and curing process:

[0037] The squeeze-shield-cure method can make it easier to clean the uncured resin, thereby simplifying the cleaning process. At the same time, as each layer is accurately cured, the need for additional curing can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0039] Figure 1 The present application is a light-curing 3D printing forming device.

[0040] In the figure: 1 - resin solution pool, 2 - substrate body, 3 - squeegee body, 4 - telescopic arm, 5 - ultraviolet irradiation lamp, 6 - light control board, 7 - squeegee lifting box. DETAILED DESCRIPTION

[0041] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0042] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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. Therefore, they should not be construed as limitations on this utility model.

[0043] 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. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] Example:

[0045] like Figure 1 As shown, this embodiment provides a photopolymerization 3D printing molding apparatus, including:

[0046] The resin solution pool 1 stores and contains the resin solution to be cured in its inner cavity. During the printing process, the resin solution pool 1 provides the required amount of resin and ensures the uniform distribution of the resin solution.

[0047] The printing substrate mechanism includes a substrate body 2 and a substrate lifting mechanism. The substrate body 2 is horizontally placed in the resin solution pool 1 to support the object to be printed and is the basis for the formation of the object during the resin curing process. The substrate lifting mechanism is fixed in the resin solution pool 1 and is a ball screw structure. The ball screw structure has the characteristics of high precision and low friction, which can accurately control the lifting of the substrate body 2.

[0048] The scraper mechanism includes a scraper body 3, a scraper pushing mechanism, and a scraper lifting mechanism. The main function of the scraper body 3 is to evenly apply the resin layer and ensure that the thickness of each resin layer is uniform. The outer end of the telescopic arm in the scraper pushing mechanism is connected to the scraper body 3. The main body of the mechanism that controls the extension and retraction of the telescopic arm 4 in the scraper pushing mechanism is installed on the scraper lifting mechanism. The scraper lifting mechanism is connected and installed on the outer tank of the resin solution tank 1 and is a ball screw structure, used to control the scraper pushing mechanism and the scraper body 3 to rise and fall together.

[0049] The ultraviolet irradiation mechanism includes an ultraviolet irradiation lamp 5, which provides ultraviolet light of a specific wavelength to the resin solution to excite the photocuring reaction of the resin and complete the printing process of the object.

[0050] The light control mechanism comprises a light control plate 6 for directional adjustment, focusing and uniform distribution of the ultraviolet light emitted by the ultraviolet irradiation lamp 5, so as to ensure uniform and accurate light irradiation of the printing area.

[0051] The device can control the scraper main body 3 and the substrate main body 2 accurately, thereby ensuring that only the slurry layer capable of curing is left for each layer.

[0052] In further embodiments, the resin solution pool 1 in the utility model is made of transparent or translucent material to facilitate observation of the liquid level of the resin solution.

[0053] In further embodiments, the light control plate 6 generally uses optical elements such as mirrors, lenses or light guide plates to disperse or focus the ultraviolet light to the printing area and control the irradiation angle to optimize the curing effect of the resin.

[0054] The surface of the substrate main body 2 needs to be finely treated to ensure that the resin can be uniformly attached.

[0055] In further embodiments, the substrate lifting mechanism has two groups and is arranged on both sides of the substrate main body 2.

[0056] In the utility model, the lifting process of the substrate main body can ensure accurate control of the thickness of the resin layer, and each layer of resin can be tightly connected and avoid printing errors.

[0057] Furthermore, first ball screw limiters are respectively installed at the upper and lower positions of the first ball screw.

[0058] Further specifically, the design of the scraper main body 3 needs to be optimized according to the requirements of the printed object, and the contact surface of the scraper main body 3 and the resin pool needs to be smooth and have appropriate pressure to ensure that the resin is not too much or too little coated.

[0059] In further specific embodiments, the scraper pushing mechanism includes multi-stage telescopic arms, multi-stage telescopic hydraulic cylinders, and a control switch, each telescopic hydraulic cylinder is used to drive the corresponding telescopic arm to extend or retract, the telescopic arm of the upper stage is correspondingly connected to the telescopic hydraulic cylinder of the lower stage, and the outer end of the telescopic arm of the last stage is connected to the scraper main body 3; the control switch is installed in the mechanism main body on the front side of the first-stage telescopic hydraulic cylinder and is electrically connected with each telescopic hydraulic cylinder. The control switch in the utility model is used for adjusting the movement of the telescopic hydraulic cylinder and the telescopic arm 4 in the scraper pushing mechanism, can accurately control the timing and strength of pushing according to the size, shape and printing layer number of the printed object and the like, and through reasonable control, the scraper pushing mechanism can efficiently and stably complete the removal of the object and avoid damage or deformation of the object.

[0060] Further, the scraper lifting mechanism includes a second servo motor installed in the scraper lifting box 7, the output shaft of the second servo motor is in transmission connection with the lower end of the second ball screw, a second screw nut is arranged on the middle threaded segment of the second ball screw, the second screw nut is connected with the mechanism main body in the scraper pushing mechanism, and the mechanism main body is guided to lift by the guide hole arranged on the scraper lifting box 7; the scraper lifting box 7 is externally provided with a scraper lifting controller for controlling the second servo motor.

[0061] Further, the upper and lower positions of the second ball screw are respectively correspondingly provided with second ball screw limiters. The second screw nut position feedback device electrically connected with the scraper lifting controller is also installed in the scraper lifting box 7.

[0062] The utility model drives the scraper main body 3 to move up and down through the second servo motor, and further controls the contact pressure and precision of the scraper main body 3 and the resin surface. The scraper lifting controller adjusts the movement track and speed of the scraper main body 3 in real time, and ensures that the thickness of the resin coated each time meets the set requirements. The accurate control of the scraper main body 3 helps to improve the stability and repeatability of the printing process.

[0063] In further specific embodiments, the light control board 6 is provided with a plurality of light transmission units similar to pixel points, and each light transmission unit is provided with a light shielding unit. The light shielding unit is controlled to open and close by the light transmission controller arranged on one side of the light control board 6. By switching the lamp shape through the light transmission controller, the ultraviolet light of a specific shape can be obtained, so as to solidify the slice layer of a specific shape. The size of the light transmission unit directly determines the roughness of the solidified layer. The smaller the light transmission unit is, the better the forming effect is.

[0064] The method for light-curing 3D printing by using the device is as follows:

[0065] Step 1: pour the mixed slurry into the resin solution pool 1;

[0066] Step 2: start the light-curing 3D printing forming device, and turn on the ultraviolet irradiation lamp 5;

[0067] Step 3: control the substrate main body 2 to fall once so that the surface is full of resin solution, and the lifting mechanism of the substrate is used to accurately control the lifting height of the substrate main body 2;

[0068] Step 4: then control the ultraviolet irradiation area and shape by using the light control panel 6, and then lift the scraper main body 3 to complete a scraping action and a smoothing action on the printing surface, and the slice thickness is adjusted by the light control panel 6;

[0069] Step 5: the ultraviolet irradiation lamp 5 follows the same direction of the scraper main body, and the light-curing parameters are irradiated and cured.

[0070] Step 6: then perform steps 3 and 4 again, and the starting point of the scraper main body in step 4 is the same; the next layer of curing is started according to step 5, and the model is completely printed and formed until the end.

[0071] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts of each embodiment can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0072] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photocured 3D printing forming device, characterized by, The application relates to a resin solution pool, a printing substrate mechanism, a scraper mechanism, an ultraviolet irradiation mechanism and a light control mechanism. The resin solution pool is made of transparent or semi-transparent material. The printing substrate mechanism comprises a substrate main body and a substrate lifting mechanism, the substrate main body is horizontally arranged in the resin solution pool. The substrate lifting mechanism is fixed in the resin solution pool and is a ball screw type structure, which is used for controlling the lifting of the substrate main body. The scraper mechanism comprises a scraper main body, a scraper pushing-out mechanism and a scraper lifting mechanism. The outer end of the telescopic arm of the scraper pushing-out mechanism is connected with the scraper main body. The mechanism main body for controlling the telescopic arm is installed on the scraper lifting mechanism.

2. The light-cured 3D printing forming device according to claim 1, characterized in that, The scraper lifting mechanism is connected with the outer pool body of the resin solution pool and is a ball screw type structure, which is used for controlling the lifting of the scraper pushing-out mechanism and the scraper main body.

3. The light-cured 3D printing forming device according to claim 1, characterized in that, The ultraviolet irradiation mechanism comprises an ultraviolet irradiation lamp, which is used for providing ultraviolet light with specific wavelength for the resin solution.

4. The light-cured 3D printing forming device according to claim 3, characterized in that, The light control mechanism comprises a light control plate, which is used for directional adjustment, focusing and uniform distribution of the ultraviolet light emitted by the ultraviolet irradiation lamp.

5. The light-cured 3D printing forming device according to claim 1, wherein, The substrate lifting mechanism comprises two groups and is arranged on the two sides of the substrate main body.

6. The light-cured 3D printing forming device according to claim 5, characterized in that, Each of the substrate lifting mechanisms comprises a first servo motor installed on the bottom surface of the resin solution pool.

7. The light-cured 3D printing forming device according to claim 6, characterized in that, The output shaft of the first servo motor is connected with the lower end of the first ball screw.

8. The light-cured 3D printing forming device according to claim 7, characterized in that, The middle threaded section of the first ball screw is provided with a first screw nut. The first screw nut is connected with the corresponding side of the substrate main body. The substrate main body is guided to lift by the guide groove arranged on the inner wall of the resin solution pool. The two first servo motors are controlled to open and close synchronously by the substrate lifting controller arranged outside the resin solution pool. The first ball screw is provided with a first ball screw limiter at the upper and lower positions. The scraper pushing-out mechanism comprises multi-stage telescopic arms, multi-stage telescopic hydraulic cylinders and a control switch. Each telescopic hydraulic cylinder is used for driving the corresponding telescopic arm to telescope. The outer end of the telescopic arm is connected with the scraper main body. The control switch is installed in the mechanism main body in front of the first telescopic hydraulic cylinder and is electrically connected with each telescopic hydraulic cylinder. The scraper lifting mechanism comprises a second servo motor installed in the scraper lifting box. The output shaft of the second servo motor is connected with the lower end of the second ball screw. The middle threaded section of the second ball screw is provided with a second screw nut. The second screw nut is connected with the mechanism main body of the scraper pushing-out mechanism. The mechanism main body is guided to lift by the guide hole arranged on the scraper lifting box. The scraper lifting box is provided with a scraper lifting controller outside for controlling the second servo motor. The second ball screw is provided with a second ball screw limiter at the upper and lower positions. The second screw nut position feedback device is electrically connected with the scraper lifting controller.

9. The light-cured 3D printing forming device according to claim 1, wherein, The light control board is provided with a plurality of light transmission units, and each light transmission unit is provided with a light shielding unit. The ultraviolet light can pass through the light transmission unit only when the light shielding unit on the light transmission unit is opened. The light shielding unit is controlled by a light transmission controller arranged on one side of the light control board.

Images