Photocuring 3D printing equipment

Abstract

The utility model relates to photocuring 3D printing equipment which comprises an exposure lens device connected to a sliding mechanism in a sliding mode, a plurality of resin grooves arranged on the lower side of the exposure lens device side by side, forming platforms arranged in one-to-one correspondence with the resin grooves, and a lifting mechanism used for adjusting the height of the forming platforms. According to the photocuring 3D printing equipment, the exposure lens device with the DMD chip is adopted, and the photocuring 3D printing equipment has the advantages of being high in material utilization rate and high in forming speed; besides, the exposure lens device is connected to the sliding mechanism in a sliding mode, dynamic projection of the exposure lens device can be achieved, the 3D printing equipment can meet large-size machining, and the machining efficiency of the 3D printing equipment is improved. Besides, the exposure lens device can alternately carry out light curing on the photosensitive resin in the multiple resin grooves, the processing time of the 3D printing equipment can be effectively shortened, the processing efficiency of the 3D printing equipment is improved, and the processing cost of the 3D printing equipment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a photopolymerization 3D printing device. Background Technology

[0002] 3D printing technology is a type of rapid prototyping technology, also known as additive manufacturing. It's a technology that constructs objects layer by layer based on digital model files. Photopolymer 3D printing is a branch of 3D printing, and with its continuous development, the demands for printing capacity and efficiency are gradually increasing.

[0003] Existing photopolymer 3D printing equipment, which uses high-energy lenses to photopolymerize and form workpieces, typically employs a single resin tank structure. The resin tank needs to be filled to the required height before production. Furthermore, during production, after each layer of workpiece is printed, it is necessary to wait for the forming platform to descend by one layer of workpiece height, and for the resin to form a uniform resin liquid surface on the workpiece before printing the next layer. This results in low production efficiency and capacity of photopolymer 3D printing equipment. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a photopolymerization 3D printing device that can improve the production efficiency of 3D printing equipment.

[0005] To achieve one of the above-mentioned objectives, this utility model provides a photopolymerization 3D printing device, comprising:

[0006] abutment;

[0007] A sliding mechanism, disposed on the base, has two sets of slide rails arranged perpendicularly to each other in the horizontal direction, used to adjust the position of the projected graphic;

[0008] An exposure lens device, slidably connected to the sliding mechanism, includes a light source, a DMD chip, and an optical lens, for generating projected images;

[0009] Multiple resin tanks are arranged side by side on the underside of the exposure lens device for holding liquid photosensitive resin;

[0010] A molding platform is provided in a corresponding manner to the resin tank, and is located in the corresponding resin tank. It is used to attach the pattern curing layer that is cured after being irradiated by the exposure lens device, so that the pattern curing layer can be accumulated to form a 3D molded part.

[0011] A lifting mechanism, connected to the corresponding forming platform, is used to adjust the height of the forming platform;

[0012] The controller is used to control the sliding mechanism, the exposure lens device, and the lifting mechanism in a coordinated manner.

[0013] Furthermore, the plurality of resin tanks are arranged side by side along the x-direction, and the sliding mechanism includes a first slide rail extending along the x-direction and a second slide rail extending along the y-direction. The first slide rail and the second slide rail are respectively used to adjust the stepping direction and scanning direction of the exposure lens device.

[0014] Furthermore, the second slide rail includes a first scanning slide rail and a second scanning slide rail arranged opposite to each other along the x-direction, with the two sides of the first slide rail slidably connected to the first scanning slide rail and the second scanning slide rail respectively, and the exposure lens device slidably connected to the first slide rail;

[0015] The sliding mechanism includes a first drive motor and a second drive motor. The first drive motor drives the exposure lens device to slide along the first slide rail, and the second drive motor drives the first slide rail to slide along the second slide rail.

[0016] Furthermore, the photopolymerization 3D printing equipment includes a liquid level sensor for monitoring the liquid level height in the resin tank, and a liquid level regulating device;

[0017] The liquid level regulating device includes a balance block located in the resin tank and a drive mechanism for adjusting the height of the balance block in the resin tank. When the balance block adjusts the liquid level in the resin tank, the balance block is located below the liquid level in the resin tank.

[0018] Furthermore, the photopolymerization 3D printing equipment includes a coating mechanism, comprising a scraper for smoothing resin near the molding surface.

[0019] Furthermore, the coating mechanism includes a pair of belt drive mechanisms arranged along the x-direction on both sides of the base, and a power device that simultaneously drives the belt drive mechanisms on both sides to move. The two ends of the scraper are respectively connected to the belts on both sides.

[0020] Furthermore, the coating mechanism also includes a pair of guide mechanisms disposed on both sides of the base, and the two ends of the scraper are respectively connected to the guide mechanisms on both sides.

[0021] Furthermore, the photopolymerization 3D printing equipment includes marble platforms located on both sides of each of the resin tanks, and the belt drive mechanism and the power unit are both installed on the marble platforms.

[0022] Furthermore, the photopolymerization 3D printing equipment is provided with a first resin tank and a second resin tank; the first resin tank is equipped with a first coating mechanism, which includes a first scraper and a first power device for driving the first scraper to move.

[0023] The second resin tank is equipped with a second coating mechanism, which includes a second scraper and a second power device for driving the second scraper to move.

[0024] A shared marble platform is provided between the two resin tanks, and the first power unit and the second power unit are installed on opposite sides of the shared marble platform.

[0025] Furthermore, the photopolymerization 3D printing equipment includes two sets of exposure lens devices, which are used to splice and print the molded parts.

[0026] The photopolymerization 3D printing equipment of this application employs an exposure lens device with a DMD chip, which has the advantages of high material utilization and fast forming speed. Furthermore, the exposure lens device is slidably connected to a sliding mechanism, enabling dynamic image projection and allowing the 3D printing equipment to handle large-size processing, thus improving processing efficiency. Moreover, the exposure lens device can alternately photopolymerize photosensitive resin in multiple resin tanks, effectively shortening processing time, increasing processing efficiency, and reducing processing costs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a photopolymerization 3D printing device shown in an exemplary embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of a photopolymer 3D printing device from another perspective;

[0029] Figure 3 This is a schematic diagram of the liquid level fine-tuning mechanism shown in an exemplary embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the coating mechanism shown in an exemplary embodiment of the present invention. Detailed Implementation

[0031] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below in conjunction with specific embodiments. Preferred embodiments of this utility model are given in the specific embodiments. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0032] The term "optionally" and the like in the present utility model refer to the embodiments of the present utility model that can provide certain beneficial effects under certain circumstances. However, in the same circumstances or other circumstances, other embodiments may also be optional. In addition, the description of one or more optional embodiments does not imply that other embodiments are not available, nor is it intended to exclude other embodiments from the scope of the present utility model.

[0033] Referring to Figures 1 to 4 As shown, the present utility model provides a light-curing 3D printing device, including a base 1, a sliding mechanism 2 disposed on the base 1, and an exposure lens device 3 slidably connected to the sliding mechanism 2. The exposure lens device 3 includes a light source, a DMD chip, and an optical lens, and is used to generate a projection pattern. The sliding mechanism 2 has two sets of slide rails arranged perpendicular to each other in the horizontal direction for adjusting the position of the projection pattern. A plurality of resin tanks 4 for containing liquid photosensitive resin are arranged side by side below the exposure lens device 3. Specifically, the plurality of resin tanks are arranged side by side along the x direction. In some embodiments, the light-curing 3D printing device is provided with two resin tanks. In other embodiments, the light-curing 3D printing device is provided with more than two resin tanks. The number of resin tanks provided can be determined according to the processing time of the 3D printing device.

[0034] Furthermore, it further includes a molding platform 5 provided corresponding to each of the resin tanks 4. The molding platform 5 is located in the corresponding resin tank 3 and is used to attach the pattern curing layer cured by irradiation of the exposure lens device 3, so as to form a 3D molded part through the accumulation of the pattern curing layer. It further includes a lifting mechanism 6 for adjusting the height of the molding platform. The lifting mechanism 6 is connected to the corresponding molding platform 5 for adjusting the height of the molding platform 5. The light-curing 3D printing device further includes a controller for jointly controlling the sliding mechanism 2, the exposure lens device 3, and the lifting mechanism.

[0035] The light-curing 3D printing device of the present application adopts an exposure lens device 3 with a DMD chip, and has the advantages of high material utilization rate and fast molding speed. In addition, the exposure lens device 3 is slidably connected to the sliding mechanism 2, which can realize the dynamic projection of the exposure lens device 3, enabling the 3D printing device to meet large-size processing and improving the processing efficiency of the 3D printing device. Moreover, the exposure lens device 3 can alternately perform light curing on the photosensitive resin in multiple resin tanks, which can effectively shorten the processing time of the 3D printing device, improve the processing efficiency of the 3D printing device, and reduce the processing cost of the 3D printing device.

[0036] The 3D printing device will be further described below through specific embodiments. It can be understood that the 3D printing devices in the following embodiments all have the above structures.

[0037] In some embodiments, the photopolymer 3D printing equipment includes two sets of exposure lens devices 3, which splice the molded parts for printing. That is, the two sets of exposure lens devices 3 simultaneously project onto a resin tank and splice them to form a larger molded part, making the photopolymer 3D printing equipment of this application suitable for large-size printing scenarios and with a wider range of applications.

[0038] In one specific embodiment, such as Figure 2 As shown, the resin tank 4 includes a first resin tank 41 and a second resin tank 42 arranged side by side along the x-direction. Specifically, the first resin tank 41 and the second resin tank 42 can be arranged along the left and right sides, or they can be arranged along the front and back sides.

[0039] The molding platform 5 includes a first molding platform 51 located in the first resin tank 41 and a second molding platform 52 located in the second resin tank 42. The lifting mechanism 6 includes a first lifting mechanism 61 for adjusting the height of the first molding platform 51 and a second lifting mechanism 62 for adjusting the height of the second molding platform 52.

[0040] The sliding mechanism 2 includes a first slide rail 21 extending along the x-direction and a second slide rail 22 extending along the y-direction. The first slide rail 21 and the second slide rail 22 are used to adjust the stepping direction and scanning direction of the exposure lens device 3, respectively. In this embodiment, the stepping direction is the x-direction and the scanning direction is the y-direction.

[0041] Furthermore, the second slide rail 22 includes a first scanning slide rail 221 and a second scanning slide rail 222 arranged opposite to each other along the x-direction. The first slide rail 21 is slidably connected to both sides of the first scanning slide rail 221 and the second scanning slide rail 222, respectively. The exposure lens device 3 is slidably connected to the first slide rail 21. The sliding mechanism includes a first drive motor and a second drive motor. The first drive motor drives the exposure lens device 3 to slide along the first slide rail, thereby adjusting the position of the exposure lens device 3 in the x-direction. This allows the exposure lens device 3 to be positioned above different resin tanks, enabling scanning and exposure of resin tanks at different locations. The second drive motor drives the first slide rail 21 to slide along the second slide rail 22, thereby adjusting the position of the exposure lens device 3 in the y-direction. This allows the exposure lens device 3 to move in the scanning direction, enabling the 3D printing equipment to print large-size patterns.

[0042] Preferably, the photopolymerization 3D printing equipment includes a liquid level sensor for monitoring the liquid level height in the resin tank, and a liquid level adjustment device; specifically, the liquid level adjustment device includes a balance block located in the resin tank and a drive mechanism for adjusting the height of the balance block in the resin tank, wherein when the balance block adjusts the liquid level height in the resin tank, the balance block is located below the liquid level in the resin tank.

[0043] Specifically, the photopolymerization 3D printing equipment includes a first liquid level sensor for detecting the liquid level in the first resin tank 41 and a second liquid level sensor for detecting the liquid level in the second resin tank 42.

[0044] like Figure 3 As shown, the liquid level fine-tuning mechanism includes: a first balance block 71 corresponding to the first resin tank 41, a first drive mechanism 73 driving the first balance block 71 to move up and down, a second balance block 72 corresponding to the second resin tank 42, and a second drive mechanism 74 driving the second balance block 72 to move up and down. In one embodiment, the liquid level fine-tuning structure further includes a liquid level adjusting shaft 75 extending in a vertical direction, and the drive mechanism drives the balance block to slide along the liquid level adjusting shaft 75 to adjust the height of the balance block in the corresponding resin tank.

[0045] Before adjusting the liquid level, the first resin tank 41 and the second resin tank 42 have been filled with a preset amount of liquid photosensitive resin manually or automatically. For example, the photosensitive resin is added to a position near the bottom of the molding surface of the resin tank. Since there is a certain error in manual or automatic addition, the liquid level height cannot be precisely controlled. Therefore, the liquid level height in the corresponding resin tank is precisely adjusted by the liquid level adjustment mechanism.

[0046] During adjustment, the lower end of the first balance block 71 is below the liquid surface of the first resin tank 41. The liquid level in the first resin tank 41 rises and falls as the first balance block 71 descends and rises. Therefore, by precisely controlling the stroke of the first drive mechanism 73, the lower end of the first balance block 71 can be precisely adjusted to be below the liquid surface of the first resin tank 41. The volume of the first balance block 71 compensates for the amount of resin in the first resin tank 41. Furthermore, during the adjustment of the first balance block 71, the first liquid level sensor provides real-time feedback. When the liquid level reaches the preset height, the first drive mechanism 73 stops, thus achieving fine adjustment of the liquid level in the first resin tank 41. It can be seen that when the first balance block 71 is completely below the liquid surface of the first resin tank 41, the liquid level in the first resin tank 41 is at its highest position. When the lower end of the first balance block 71 is above the liquid surface of the first resin tank 41, the liquid level in the first resin tank 41 is at its lowest position. In different embodiments, different liquid level adjustment ranges can be achieved by changing the volume of the first balance block 71.

[0047] In this application, the second balance block 72 adjusts the liquid level of the second resin tank 42 in the same way as the first balance block 71, and will not be described again. Therefore, this application uses a liquid level fine-tuning mechanism to precisely adjust the liquid level in each resin tank to a preset height.

[0048] Preferably, the photopolymerization 3D printing equipment includes a coating mechanism, which includes a scraper for smoothing the resin near the molding surface to ensure uniform resin after coating, thereby ensuring uniform resin in the printed layer. At the same time, it removes surface air bubbles to prevent them from affecting the printing quality, which can effectively improve the equipment yield and thus increase the machine's uptime.

[0049] In some embodiments, the photopolymerization 3D printing equipment includes a first coating mechanism located above a first resin tank 41 and a second coating mechanism located above a second resin tank 42. For example... Figure 4 As shown, specifically, the first coating mechanism includes a first scraper 81 for smoothing the resin on the molding surface of the first molding platform 51, a pair of first belt drive mechanisms 82 arranged along the x-direction on both sides of the base 1, and a first power device 83 that simultaneously drives the first belt drive mechanisms 82 on both sides. The two ends of the first scraper 81 are respectively connected to the belts on both sides. The first power device 83 drives the pair of first belt drive mechanisms 82 to rotate. Each first belt drive mechanism 82 includes a first pulley and a first belt linked to the first pulley. In this utility model, the two ends of the first scraper 81 are respectively connected to the first belts on both sides, so that the force on the first scraper 81 is more uniform when it moves, ensuring that the resin is uniform after scraping.

[0050] The second coating mechanism includes a second scraper 91 for smoothing the resin on the molding surface of the second molding platform 52, a pair of second belt drive mechanisms 92 arranged along the x-direction on both sides of the base 1, and a second power device 93 that simultaneously drives the second belt drive mechanisms 92 on both sides. The two ends of the second scraper 91 are respectively connected to the belts on both sides. The second power device 93 drives the pair of second belt drive mechanisms 92 to rotate. Each second belt drive mechanism 92 includes a second pulley and a second belt linked to the second pulley. In this invention, the two ends of the second scraper 91 are respectively connected to the second belts on both sides, so that the force on the second scraper 91 is more uniform when it moves, ensuring that the resin is uniform after coating.

[0051] The coating mechanism also includes a pair of guide mechanisms 10 disposed on both sides of the base 1, and the two ends of the scraper are respectively connected to the guide mechanisms 10 on both sides.

[0052] The photopolymer 3D printing equipment includes marble platforms located on both sides of each resin tank. The belt drive mechanism and the power unit are both installed on the marble platforms to better ensure the flatness of both sides of the scraper and further ensure the scraping effect of the scraper.

[0053] In one embodiment, both the first power unit 83 and the second power unit 93 are electric motors. A common marble platform 11 is provided between the two resin tanks, and the first power unit 83 and the second power unit 90 are installed on opposite sides of the common marble platform 11, reducing the space occupied by the power units and making the 3D printing equipment structure compact.

[0054] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A photopolymerization 3D printing device, characterized in that, include: abutment; A sliding mechanism, disposed on the base, has two sets of slide rails arranged perpendicularly to each other in the horizontal direction, used to adjust the position of the projected graphic; An exposure lens device, slidably connected to the sliding mechanism, includes a light source, a DMD chip, and an optical lens, for generating projected images; Multiple resin tanks are arranged side by side on the underside of the exposure lens device for holding liquid photosensitive resin; A molding platform is provided in a corresponding manner to the resin tank, and is located in the corresponding resin tank. It is used to attach the pattern curing layer that is cured after being irradiated by the exposure lens device, so that the pattern curing layer can be accumulated to form a 3D molded part. A lifting mechanism, connected to the corresponding forming platform, is used to adjust the height of the forming platform; The controller is used to control the sliding mechanism, the exposure lens device, and the lifting mechanism in a coordinated manner.

2. The photopolymerization 3D printing equipment according to claim 1, characterized in that, The resin tanks are arranged side by side along the x-direction, and the sliding mechanism includes a first slide rail extending along the x-direction and a second slide rail extending along the y-direction. The first slide rail and the second slide rail are used to adjust the stepping direction and scanning direction of the exposure lens device, respectively.

3. The photopolymerization 3D printing equipment according to claim 2, characterized in that, The second slide rail includes a first scanning slide rail and a second scanning slide rail arranged opposite to each other along the x-direction. The two sides of the first slide rail are slidably connected to the first scanning slide rail and the second scanning slide rail, respectively. The exposure lens device is slidably connected to the first slide rail. The sliding mechanism includes a first drive motor and a second drive motor. The first drive motor drives the exposure lens device to slide along the first slide rail, and the second drive motor drives the first slide rail to slide along the second slide rail.

4. The photopolymerization 3D printing equipment according to claim 1, characterized in that, The photopolymerization 3D printing equipment includes a liquid level sensor for monitoring the liquid level in the resin tank, and a liquid level regulating device. The liquid level regulating device includes a balance block located in the resin tank and a drive mechanism for adjusting the height of the balance block in the resin tank. When the balance block adjusts the liquid level in the resin tank, the balance block is located below the liquid level in the resin tank.

5. The photopolymerization 3D printing equipment according to claim 1, characterized in that, The photopolymer 3D printing equipment includes a coating mechanism, comprising a scraper for smoothing resin near the molding surface.

6. The photopolymerization 3D printing equipment according to claim 5, characterized in that, The coating mechanism includes a pair of belt drive mechanisms arranged along the x-direction on both sides of the base, and a power device that drives the belt drive mechanisms on both sides to move. The two ends of the scraper are respectively connected to the belts on both sides.

7. The photopolymerization 3D printing equipment according to claim 6, characterized in that, The coating mechanism also includes a pair of guide mechanisms disposed on both sides of the base, and the two ends of the scraper are respectively connected to the guide mechanisms on both sides.

8. The photopolymerization 3D printing equipment according to claim 6 or 7, characterized in that, The photopolymer 3D printing equipment includes marble platforms located on both sides of each of the resin tanks, and the belt drive mechanism and the power unit are both installed on the marble platforms.

9. The photopolymerization 3D printing equipment according to claim 8, characterized in that, The photopolymerization 3D printing equipment is provided with a first resin tank and a second resin tank; the first resin tank is equipped with a first coating mechanism, which includes a first scraper and a first power device for driving the first scraper to move. The second resin tank is equipped with a second coating mechanism, which includes a second scraper and a second power device for driving the second scraper to move. A shared marble platform is provided between the two resin tanks, and the first power unit and the second power unit are installed on opposite sides of the shared marble platform.

10. The photopolymerization 3D printing equipment according to claim 1, characterized in that, The photopolymer 3D printing equipment includes two sets of exposure lens devices, which are used to splice and print the molded parts.

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