DLP photocuring 3D printer with self-cleaning structure

Abstract

The utility model provides a DLP photocuring 3D printer with a self-cleaning structure, which comprises a printer box with a base and a printing main shaft which is arranged on the top surface of the base and is provided with a forming table, the top surface of the base is also provided with a cleaning structure, a rotating device and a resin tank, and the resin tank is positioned right below the forming table; the rotating device is arranged at the printing main shaft and is used for driving the resin groove to rotate on the base around the printing main shaft; the cleaning structure is located on the rotating path of the resin tank and used for cleaning the bottom wall of the resin tank. The resin tank can automatically pass through the cleaning structure located on the rotating path when rotating, so that the cleaning structure cleans the outer surface of the bottom wall of the resin tank, and the situation that dirt influences passing of ultraviolet light is reduced; and the resin tank can be automatically cleaned during working, and the situation that cleaning can be conducted only through manual disassembly is reduced.

Description

Technical Field

[0001] The utility model relates to the field of 3D printing, in particular to a DLP light-curing 3D printer with a self-cleaning structure. Background Art

[0002] In recent years, digital light processing technology (DLP) based on digital micromirror devices has gradually attracted people's attention. The DLP light-curing 3D printing technology uses a digital light processor (DLP) with a relatively high resolution to cure a liquid photopolymer (photosensitive resin) layer by layer to cure the liquid polymer, and so on in a cycle until the final model is completed. Among them, the DLP projector projects the sliced pattern of each layer of the model onto the bottom of the resin tank filled with photosensitive resin, so that the bottom layer of photosensitive resin is cured. The forming table is lifted upward, and the projector projects again, causing another layer to be cured, and finally the whole model is formed.

[0003] In actual work, if there is dirt on the outer surface of the bottom wall of the resin tank, it will affect the passage of ultraviolet light, thereby affecting the quality of 3D printing. Therefore, it is necessary to clean the outer surface of the bottom wall of the resin tank. However, since the operation steps of disassembling the resin tank are relatively cumbersome, a large amount of time and labor are required for each cleaning, disassembly, and installation. Summary of the Utility Model

[0004] The present application provides a DLP light-curing 3D printer with a self-cleaning structure, which has the effect of automatically cleaning the outer surface of the bottom wall of the resin tank during operation.

[0005] The DLP light-curing 3D printer with a self-cleaning structure provided by the present application adopts the following technical solutions:

[0006] A DLP light-curing 3D printer with a self-cleaning structure includes a printer case with a base and a printing spindle with a forming table installed on the top surface of the base. A cleaning structure, a rotating device, and a resin tank are also installed on the top surface of the base. The resin tank is located directly below the forming table. The rotating device is arranged at the printing spindle and is used to drive the resin tank to rotate around the printing spindle on the base. The cleaning structure is located on the rotation path of the resin tank and is used to clean the bottom wall of the resin tank.

[0007] Through the above technical solutions, when the resin tank rotates, it will automatically pass through the cleaning structure located on the rotation path, so that the cleaning structure can clean the outer surface of the bottom wall of the resin tank, reducing the situation where dirt affects the passage of ultraviolet light. The resin tank can automatically complete cleaning during operation, reducing the need for manual disassembly for cleaning.

[0008] Preferably, the cleaning structure includes a carrier plate, a lifting electric cylinder and a receiving seat. The lifting electric cylinder is fixed inside the receiving seat, and a water storage tank is formed on the top surface of the receiving seat. The lifting rod of the lifting electric cylinder passes through the water storage tank and extends upward. A carrier plate is installed at the top of the lifting rod. An activity groove is formed on the top surface of the base, and the activity groove, the carrier plate and the water storage tank are arranged in an up-and-down corresponding manner. A sponge is fixed at one end of the carrier plate away from the forming table. The top surface of the sponge is flush with the top surface of the base. The thickness D of the sponge is greater than the thickness d of the carrier plate, and a cleaning liquid is poured into the water storage tank.

[0009] Through the above technical solution, the sponge absorbs the cleaning liquid in the water storage tank through the lifting of the lifting electric cylinder and guides it to the top surface in contact with the outer surface of the bottom wall of the resin tank, so as to clean the outer surface of the bottom wall of the resin tank when the resin tank rotates; at the same time, the user can also decide whether to clean the bottom at any time through the lifting electric cylinder.

[0010] Preferably, a cleaning cloth is also pasted on the carrier plate through a magic tape. The cleaning cloth is located between the sponge and the resin tank, and a partition is also installed between the cleaning cloth and the sponge. The top surface of the cleaning cloth is flush with the top surface of the base.

[0011] Through the above technical solution, since the cleaning cloth is located between the resin tank and the sponge, when the resin tank rotates and returns to its position, the cleaning cloth can wipe off the residual cleaning liquid on the outer surface of the bottom wall of the resin tank, avoiding the influence of the cleaning liquid on the ultraviolet light; and due to the existence of the magic tape, the user can tear off the cleaning cloth from the carrier plate for cleaning and replacement.

[0012] Preferably, a plurality of rubber scraping strips are also installed on the carrier plate. The plurality of rubber scraping strips are located between the resin tank and the cleaning cloth. The length direction of the rubber scraping strips is perpendicular to the rotation path of the resin tank. The top surface of the rubber scraping strips is flush with the top surface of the base.

[0013] Through the above technical solution, the rubber scraping strips are used to scrape off the water stains that may remain after the cleaning cloth wipes off the water, avoiding the influence of the water stains on the ultraviolet light.

[0014] Preferably, a drawing groove is formed on the base, and the receiving seat is slidably installed in the drawing groove. A handle and a control switch are installed on the outer side surface of the receiving seat, and the control switch is used to control the lifting of the lifting electric cylinder.

[0015] Through the above technical solution, the user can lower the lifting electric cylinder through the control switch, so as to conveniently draw out the receiving seat from the drawing groove to replenish the cleaning liquid in the water storage tank.

[0016] Preferably, an arc-shaped limiting plate is installed on the top surface of the base. An arc groove is formed on the arc-shaped limiting plate. A limiting block is installed on the outer surface of the front side wall of the resin tank, and the limiting block is movably installed in the arc groove.

[0017] Through the above technical solution, the linkage of the arc-shaped limiting plate and the limiting block is utilized to restrict the vertical movement tendency of the resin tank during rotation, thereby ensuring the stability of the resin tank during rotation and improving the accuracy during the printing process.

[0018] Preferably, the rotating device includes a motor and a linkage plate. The motor is installed inside the printing main shaft, and the output end of the motor is arranged upward; an avoidance groove is provided on the printing main shaft. One end of the linkage plate is arranged at the output end of the motor, and the other end passes through the avoidance groove and is fixed on the outer surface of the rear side wall of the resin tank.

[0019] Through the above technical solution, due to the surface tension, when the forming platform is lifted upward, the printed slice may be torn off from the forming platform due to the surface tension between the resin and the forming platform. The motor and the linkage plate are used to drive the resin tank to rotate and simultaneously drive the forming platform to lift; the rotation of the resin tank causes the resin in the resin tank to flow, thereby breaking the surface tension and reducing the situation where the slice is torn off from the forming platform.

[0020] The technical effects of the present utility model are mainly reflected in the following aspects:

[0021] 1. By arranging a cleaning structure on the rotation path through which the resin tank automatically rotates, the cleaning structure can clean the outer surface of the bottom wall of the resin tank, reducing the influence of dirt on the passage of ultraviolet light; enabling the resin tank to automatically complete cleaning during operation and reducing the situation where manual disassembly is required for cleaning;

[0022] 2. By sequentially designing a rubber squeegee, a wiping cloth, and a sponge on the bearing plate, it can timely dry the cleaning liquid and water stains after cleaning the outer surface of the bottom wall of the resin tank;

[0023] 3. By making the receiving seat slide in the draw groove and setting the switch of the lifting electric cylinder on the outer surface of the receiving seat, it is convenient for the user to add cleaning liquid and control whether to clean the bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of a partial structure of an embodiment of the present application;

[0026] Figure 3 In an embodiment of the present application Figure 2 is an enlarged schematic diagram of part A in.

[0027] Reference numerals: 1, printer housing; 11, base; 111, movable groove; 112, extraction groove; 2, printing main shaft; 21, avoidance groove; 22, forming table; 3, cleaning structure; 31, carrier plate; 32, sponge; 33, cleaning cloth; 34, magic tape; 35, partition; 36, rubber squeegee; 37, lifting electric cylinder; 38, receiving seat; 381, water storage tank; 382, handle; 383, control switch; 4, motor; 5, linkage plate; 6, resin tank; 61, limiting block; 7, arc-shaped limiting plate; 71, arc groove. Detailed implementation manners

[0028] The following Figures 1-3 is combined with the attached drawings to further elaborate on the detailed implementation manners of the present utility model, so that the technical solutions of the present utility model are easier to understand and master.

[0029] The embodiment of the present application discloses a DLP light-curing 3D printer with a self-cleaning structure:

[0030] Referring to Figures 1-2 , a DLP light-curing 3D printer with a self-cleaning structure includes a printer housing 1 with a base 11 and a printing main shaft 2 installed on the top surface of the base 11 and having a forming table 22. A cleaning structure 3, a rotating device, and a resin tank 6 are also installed on the top surface of the base 11. The resin tank 6 is located directly below the forming table 22; the rotating device is arranged at the printing main shaft 2 and is used to drive the resin tank 6 to rotate around the printing main shaft 2 on the base 11; the cleaning structure 3 is located on the rotation path of the resin tank 6 and is used to clean the bottom wall of the resin tank 6. In actual work, the resin tank 6 will first rotate counterclockwise through the cleaning structure 3 located on the rotation path, so that the cleaning structure 3 can clean the outer surface of the bottom wall of the resin tank 6, and then rotate clockwise to return to its original position; this reduces the influence of dirt on the passage of ultraviolet light; enables the resin tank 6 to automatically complete cleaning during operation, and reduces the situation where manual disassembly is required for cleaning.

[0031] Referring to Figure 3, the cleaning structure 3 includes a carrier plate 31, a lifting electric cylinder 37 and a receiving seat 38. The lifting electric cylinder 37 is fixed inside the receiving seat 38, and a water storage tank 381 is provided on the top surface of the receiving seat 38; the lifting rod of the lifting electric cylinder 37 passes through the water storage tank 381 and is arranged upward, and the carrier plate 31 is installed on the top of the lifting rod. An activity groove 111 is provided on the top surface of the base 11, and the activity groove 111, the carrier plate 31 and the water storage tank 381 are arranged vertically corresponding to each other; a sponge 32 is fixed at one end of the carrier plate 31 away from the molding table 22, and the top surface of the sponge 32 is flush with the top surface of the base 11. The thickness D of the sponge 32 is greater than the thickness d of the carrier plate 31, and cleaning liquid is poured into the water storage tank 381. The sponge 32 absorbs the cleaning liquid in the water storage tank 381 through the lifting of the lifting electric cylinder 37 and guides it to the top surface in contact with the outer surface of the bottom wall of the resin tank 6, so as to clean the outer surface of the bottom wall of the resin tank 6 when the resin tank 6 rotates; at the same time, the user can also decide whether to clean the bottom at any time through the lifting electric cylinder 37. At the same time, since the thickness of the sponge 32 is greater than the thickness of the carrier plate 31, the sponge 32 will touch the cleaning liquid in the water storage tank 381 first to prevent the carrier plate 31 from touching the cleaning liquid.

[0032] Referring to Figure 3 , a cleaning cloth 33 is also pasted on the carrier plate 31 through a magic tape 34. The cleaning cloth 33 is located between the sponge 32 and the resin tank 6, and a partition plate 35 is also installed between the cleaning cloth 33 and the sponge 32; the top surface of the cleaning cloth 33 is flush with the top surface of the sponge 32. Since the cleaning cloth 33 is located between the resin tank 6 and the sponge 32, when the resin tank 6 rotates and returns to its position, the cleaning cloth 33 can wipe off the residual cleaning liquid on the outer surface of the bottom wall of the resin tank 6 to avoid the influence of the cleaning liquid on the ultraviolet light. And due to the existence of the magic tape 34, the user can tear off the cleaning cloth 33 from the carrier plate 31 for cleaning and replacement. At the same time, since there is a partition plate 35 between the cleaning cloth 33 and the sponge 32, the purpose of the partition plate 35 is to prevent the cleaning cloth from directly absorbing the cleaning liquid in the sponge 32, resulting in the loss of the ability to dry the outer surface of the bottom wall of the resin tank 6.

[0033] Referring to Figure 3 , a plurality of rubber scraping strips 36 are also installed on the carrier plate 31. The plurality of rubber scraping strips 36 are located between the resin tank 6 and the cleaning cloth 33, and the length direction of the rubber scraping strips 36 is perpendicular to the rotation path of the resin tank 6; the top surface of the rubber scraping strips 36 is flush with the top surface of the cleaning cloth 33. The rubber scraping strips 36 are used to scrape off the water stains that may remain after the cleaning cloth 33 wipes the water, so as to avoid the influence of the water stains on the ultraviolet light.

[0034] Referring to Figures 1-2, a draw groove 112 is formed on the base 11, and the receiving seat 38 is slidably received in the draw groove 112; a handle 382 and a control switch 383 are installed on the outer side surface of the receiving seat 38, and the control switch 383 is used to control the lifting of the lifting electric cylinder 37. The user can lower the lifting electric cylinder 37 through the control switch 383, so as to conveniently draw out the receiving seat 38 from the draw groove 112 to supplement the cleaning liquid into the water storage tank 381.

[0035] Referring to Figures 1-2 , an arc-shaped limiting plate 7 is installed on the top surface of the base 11, an arc groove 71 is formed on the arc-shaped limiting plate 7, a limiting block 61 is installed on the outer surface of the front side wall of the resin tank 6, and the limiting block 61 is movably received in the arc groove 71. By utilizing the linkage of the arc-shaped limiting plate 7 and the limiting block 61, the vertical movement tendency of the resin tank 6 during rotation is restricted, thereby ensuring the stability of the resin tank 6 during rotation, and improving the accuracy during the printing process.

[0036] Referring to Figures 1-2 , the rotating device includes a motor 4 and a linkage plate 5. The motor 4 is installed inside the printing main shaft 2, and the output end of the motor 4 is arranged upward. An avoidance groove 21 is formed on the printing main shaft 2. One end of the linkage plate 5 is fixed at the output end of the motor 4, and the other end passes through the avoidance groove 21 and is fixed on the outer surface of the rear side wall of the resin tank 6. Due to surface tension, when the forming platform 22 is lifted upward, the printed slice may be torn off from the forming platform 22 due to the surface tension between the resin and the forming platform 22. The motor 4 and the linkage plate 5 are used to drive the resin tank 6 to rotate and simultaneously drive the forming platform 22 to lift; the rotation of the resin tank 6 causes the resin in the resin tank 6 to flow, thereby breaking the surface tension and reducing the situation where the slice is torn off from the forming platform 22.

[0037] Of course, the above are only typical examples of the present invention. In addition, the present invention can also have many other specific implementation manners. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present invention.

Claims

1. A DLP light-curing 3D printer with a self-cleaning structure, comprising a printing box (1) with a base (11) and a printing spindle (2) mounted on the top surface of the base (11) and having a molding table (22), characterized in that: The top surface of the base (11) is also equipped with a cleaning structure (3), a rotating device and a resin tank (6), wherein the resin tank (6) is located directly below the molding table (22); the rotating device is arranged at the printing spindle (2) and is used to drive the resin tank (6) to rotate around the printing spindle (2) on the base (11); the cleaning structure (3) is located on the rotating path of the resin tank (6) and is used to clean the bottom wall of the resin tank (6).

2. A DLP light-curing 3D printer with a self-cleaning structure according to claim 1, characterized in that: The cleaning structure (3) comprises a bearing plate (31), a lifting electric cylinder (37) and a receiving seat (38); the lifting electric cylinder (37) is fixed in the receiving seat (38); a water storage tank (381) is provided on the top surface of the receiving seat (38); a lifting rod of the lifting electric cylinder (37) passes through the water storage tank (381) and is arranged upward, and a bearing plate (31) is installed on the top of the lifting rod; a movable groove (111) is provided on the top surface of the base (11); the movable groove (111), the bearing plate (31) and the water storage tank (381) are arranged correspondingly up and down; a sponge (32) is fixed to one end of the bearing plate (31) away from the forming table (22); the top surface of the sponge (32) is flush with the top surface of the base (11); the thickness D of the sponge (32) is greater than the thickness d of the bearing plate (31); and cleaning liquid is poured into the water storage tank (381).

3. A DLP light-curing 3D printer with a self-cleaning structure according to claim 2, characterized in that: A rag (33) is also attached to the carrying plate (31) via a Velcro (34); the rag (33) is located between the sponge (32) and the resin tank (6); a partition (35) is also installed between the rag (33) and the sponge (32); the top surface of the rag (33) is flush with the top surface of the base (11).

4. A DLP light-curing 3D printer with a self-cleaning structure according to claim 3, characterized in that: A plurality of rubber scraping strips (36) are also mounted on the carrier plate (31). The plurality of rubber scraping strips (36) are located between the resin tank (6) and the wiping cloth (33). The length direction of the rubber scraping strips (36) is perpendicular to the rotation path of the resin tank (6). The top surface of the rubber scraping strips (36) is flush with the top surface of the base (11).

5. A DLP light-curing 3D printer with a self-cleaning structure according to claim 2, characterized in that: The base (11) is provided with a draw groove (112), and the accommodating seat (38) is movable in the draw groove (112); a handle (382) and a control switch (383) are installed on the outer side of the accommodating seat (38), and the control switch (383) is used to control the lifting and lowering of the lifting electric cylinder (37).

6. A DLP light-curing 3D printer with a self-cleaning structure according to claim 1, characterized in that: An arc-shaped limiting plate (7) is installed on the top surface of the base (11), an arc groove (71) is opened on the arc-shaped limiting plate (7), and a limiting block (61) is installed on the outer surface of the front side wall of the resin tank (6), and the limiting block (61) moves in the arc groove (71).

7. A DLP light-curing 3D printer with a self-cleaning structure according to claim 1, characterized in that: The rotating device comprises a motor (4) and a linkage plate (5); the motor (4) is installed in the printing spindle (2), and the output end of the motor (4) is arranged to face upward; the printing spindle (2) is provided with an avoidance groove (21); one end of the linkage plate (5) is arranged at the output end of the motor (4), and the other end passes through the avoidance groove (21) and is fixed to the outer surface of the rear side wall of the resin tank (6).

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