Auxiliary spray painting device for color printing and SLA photocuring 3D printer thereof

Abstract

The utility model discloses an auxiliary inkjet device for color printing and an SLA photocuring 3D printer thereof, the auxiliary inkjet device for color printing comprises a resin pool and a curing laser arranged above the resin pool, the resin pool is internally provided with a lifting platform capable of moving up and down, a scraper assembly crossing the lifting platform is arranged above the resin pool, and the curing laser is arranged above the resin pool. The scraper assembly is horizontally and movably arranged along the upper surface of the resin pool, the inkjet frame which horizontally moves along the upper surface of the resin pool is arranged on one side of the scraper assembly, and a plurality of color nozzles are arranged in the inkjet frame. The auxiliary inkjet device for color printing is simple in structure and easy to mount and use, and can be mounted on a 3d printer in a sliding manner to color resin parts, so that colored three-dimensional objects can be directly produced.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printers, and in particular to an auxiliary inkjet device for color printing and a SLA light-curing 3D printer thereof. Background Art

[0002] The SLA light-curing 3D printing method uses laser irradiation on liquid photosensitive resin (UV resin) on demand to obtain the desired three-dimensional entity. During the printing process, a liftable substrate is lowered by one layer thickness to the next layer thickness below the resin pool liquid level. The resin flows onto the substrate and is scraped flat by a scraper. The laser scans the solid area of ​​the current slice to solidify the UV resin. After the current layer is completed, the lifting device drives the substrate to drop by one layer thickness, and the liquid in the resin pool flows to the top of the solidified layer. The scraper scrapes it flat and then scans the laser to complete the solidification of a new layer of slices. This is repeated to finally obtain the desired three-dimensional entity. However, the resin solidified by this SLA is monochrome and cannot directly produce colored three-dimensional objects. Summary of the invention

[0003] The purpose of the utility model is to provide a color printing auxiliary inkjet device and a SLA light-curing 3D printer thereof in view of the problems existing in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] An auxiliary inkjet device for color printing comprises a movably mounted inkjet frame, wherein a rectangular through slot is arranged in the inkjet frame, and first slide rails are respectively arranged on both sides of the rectangular through slot, and a pair of the first slide rails are connected to a nozzle mounting plate spanning the rectangular through slot via a plurality of first sliders, and a nozzle mounting slot passing downward through the rectangular through slot is arranged in the nozzle mounting plate, and a plurality of color nozzles are installed in the nozzle mounting slot; a first driving assembly is also arranged on the inkjet frame, and the first driving assembly is connected to and drives the nozzle mounting plate.

[0006] The auxiliary inkjet device for color printing has a simple structure and is easy to install and use. It can be slidably installed on a 3D printer to color resin parts so as to directly produce colored three-dimensional objects.

[0007] The setting of the printing frame is convenient for installing the whole device on the 3D printer on the one hand, and is used as a mounting platform on the other hand, which can better install these color nozzles and enable these color nozzles to reciprocate within the range of its rectangular through groove.

[0008] Furthermore, the color nozzles are four UV resin nozzles, which are arranged side by side and include four colors of CMYK. They can spray CMYK four-color UV resins. The four-color ink droplets are mixed in different proportions to obtain the required color.

[0009] Furthermore, the first driving assembly includes a nozzle moving screw arranged parallel to the first slide rail, and both ends of the nozzle moving screw are respectively installed on the inkjet frame through a first screw support bearing seat, and at least one end of the nozzle moving screw is also connected to a first driving motor, and the first screw sleeve on the nozzle moving screw is connected to the nozzle mounting plate through a nozzle connecting plate.

[0010] A SLA light-curing 3D printer with the above-mentioned auxiliary inkjet device for color printing includes a resin pool and a curing laser arranged above the resin pool, a lifting platform that can be raised and lowered is provided in the resin pool, a scraper assembly that spans the lifting platform is provided above the resin pool, the scraper assembly is arranged to move horizontally along the upper surface of the resin pool, one side of the scraper assembly is provided with the inkjet frame that moves horizontally along the upper surface of the resin pool, and the moving direction of the nozzle mounting plate is perpendicular to the moving direction of the inkjet frame and the scraper assembly.

[0011] By arranging the inkjet frame and the scraper assembly together above the resin pool and enabling them to reciprocate along the resin pool, the scraper assembly and the color nozzles in the inkjet frame can fully cover the printing area, so that when the printer prints a three-dimensional part, it can be fully colored. The color nozzle can move longitudinally along the resin pool with the inkjet frame, and can also move transversely relative to the resin pool in the inkjet frame.

[0012] Furthermore, a pair of second slide rails arranged in parallel are provided on both sides of the table of the resin pool, and the scraper assembly and the spray painting frame are connected to the pair of second slide rails through a plurality of second sliders, and the plurality of second sliders are electric or pneumatic sliders.

[0013] Furthermore, the scraper assembly includes a scraper mounting plate arranged across the resin pool, a scraper extending into the resin pool is connected below the scraper mounting plate, and a length dimension of the scraper is smaller than a lateral dimension of the resin pool and larger than a lateral dimension of the lifting platform.

[0014] Furthermore, a horizontal support frame is provided on one side of the resin pool, and a vertical connecting plate is provided on the horizontal support frame. One side of the vertical connecting plate is connected to a lifting screw through a plurality of second screw support bearing seats. A second screw sleeve is provided on the lifting screw, and the second screw sleeve is connected to the lifting platform through a lifting platform connecting plate. A second driving motor connected to the lifting screw is also provided above the vertical connecting plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: 1. The auxiliary spraying device for color printing has a simple structure, is easy to install and use, and can be slidably installed on a 3D printer to color the resin parts to be formed so as to directly produce colored three-dimensional objects; 2. The setting of the spraying frame facilitates the installation of the entire device on the 3D printer on the one hand, and is used as a mounting platform on the other hand, which can better install these color nozzles and enable these color nozzles to reciprocate within the range of its rectangular through groove; 3. By arranging the spraying frame and the scraper assembly together above the resin pool and enabling reciprocating movement along the resin pool, the scraper assembly and the color nozzles in the spraying frame can fully cover the printing area, so that when the printer prints three-dimensional parts, they can be fully colored; 4. For the color nozzle, it can move longitudinally along the resin pool along with the spraying frame, and can also move laterally relative to the resin pool in the spraying frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the principle of the SLA light-curing 3D printer of the utility model;

[0017] Figure 2 This is a schematic diagram of the top view of the structure of a color printing auxiliary inkjet device of the utility model;

[0018] Figure 3 The three-dimensional structure of the SLA light-curing 3D printer with an auxiliary printing device of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 4 The three-dimensional structure of the SLA light-curing 3D printer with an auxiliary printing device of the utility model is shown in FIG. Figure 2 ;

[0020] In the figure: 1. resin pool; 2. photocurable resin liquid; 3. liquid surface; 4. lifting platform; 5. curing laser; 6. scraper assembly; 601. scraper mounting plate; 602. scraper; 7. parts; 8. inkjet frame; 9. rectangular through groove; 10. first slide rail; 11. first slider; 12. nozzle mounting plate; 13. nozzle mounting groove; 14. color nozzle; 15. nozzle moving screw; 16. first screw support bearing seat; 17. first drive motor; 18. first screw sleeve; 19. nozzle connecting plate; 20. second slide rail; 21. second slider; 22. horizontal support frame; 23. vertical connecting plate; 24. lifting screw; 25. second screw support bearing seat; 26. second drive motor; 27. substrate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] Embodiment 1:

[0024] like Figure 2 As shown, an auxiliary inkjet device for color printing includes a movably installed inkjet frame 8, wherein a rectangular through slot 9 is provided in the inkjet frame 8, and first slide rails 10 are respectively provided on both sides of the rectangular through slot 9, and a pair of the first slide rails 10 are connected to a nozzle mounting plate 12 spanning the rectangular through slot 9 through a plurality of first sliders 11, and a nozzle mounting slot 13 passing downward through the rectangular through slot is provided in the nozzle mounting plate 12, and a plurality of color nozzles 14 are installed in the nozzle mounting slot 13; a first driving assembly is also provided on the inkjet frame 8, and the first driving assembly is connected to and drives the nozzle mounting plate 12.

[0025] The auxiliary inkjet device for color printing has a simple structure and is easy to install and use. It can be slidably installed on a 3D printer to color resin parts so as to directly produce colored three-dimensional objects.

[0026] The setting of the printing frame 8 facilitates the installation of the entire device on the 3D printer on the one hand, and is used as a mounting platform on the other hand, which can better install these color nozzles and enable these color nozzles to reciprocate within the range of their rectangular through grooves.

[0027] The nozzle mounting plate 12 can move parallel to the first slide rail 10 by means of the first sliders 11 on both sides, and the nozzle mounting groove extending downward can accommodate a plurality of color nozzles 14, so that the color nozzles can work during the movement and spray the raw materials on the parts to be formed. The first driving component can directly drive the nozzle mounting plate 12 to move, that is, drive the plurality of color nozzles 14 to move synchronously.

[0028] Furthermore, the color nozzles 14 are four UV resin nozzles, and the four color nozzles 14 are arranged side by side, including four colors of CMYK.

[0029] The auxiliary inkjet device utilizes the four color nozzles 14 to spray out CMYK 4-color UV resin. The four-color ink droplets are mixed in different proportions to obtain the desired color. CMYK 4-color is the most widely used color mode in printing, and is also the overprinting printing system used for four-color versioning. It refers to the use of cyan, magenta, yellow and black inks to overprint to present colors. UV resin is a light-curing resin, usually a light-colored transparent liquid. It does not require curing agent and accelerator to coat the surface. After lamination, it can be completely cured by laser irradiation for a few seconds. It has high hardness after curing. CMYK 4 and UV resin are blended to obtain CMYK 4-color UV resin.

[0030] The color nozzle can accommodate a certain amount of color UV resin ink by itself, but the viscosity is lower; the color nozzle can also be connected to an ink cartridge of a corresponding color for ink supply.

[0031] Furthermore, the first driving assembly includes a nozzle moving screw 15 arranged parallel to the first slide rail 10, and both ends of the nozzle moving screw 15 are respectively installed on the inkjet frame 8 through a first screw support bearing seat 16, and at least one end of the nozzle moving screw 15 is also connected to a first driving motor 17, and the first screw sleeve 18 on the nozzle moving screw 15 is connected to the nozzle mounting plate 12 through a nozzle connecting plate 19.

[0032] The first driving motor 17 can drive the nozzle moving screw 15 to rotate, prompting the first screw sleeve 18 to move along the nozzle moving screw 15, thereby driving the nozzle mounting plate 12 to move; a pair of first screw support bearing seats 16 can stably support the nozzle moving screw 15, and the setting of the nozzle connecting plate 19 facilitates the connection between the nozzle mounting plate 12 and the first screw sleeve 18.

[0033] Embodiment 2:

[0034] This embodiment provides a SLA light-curing 3D printer having the auxiliary inkjet device for color printing in Embodiment 1, such as Figure 1 , Figure 3 and Figure 4 As shown, it includes a resin pool 1, and a curing laser 5 (such as a helium-cadmium laser) arranged above the resin pool 1, a photocurable resin liquid 2 is arranged in the resin pool, and a lifting platform 4 that can be raised and lowered is also arranged in the resin pool 1, a scraper assembly 6 is arranged across the lifting platform 4 above the resin pool 1, the scraper assembly 6 is arranged to move horizontally along the upper surface (liquid surface 3) of the resin pool 1, and a spray frame 8 that moves horizontally along the upper surface of the resin pool 1 is arranged on one side of the scraper assembly 6, and the movement direction of the nozzle mounting plate 12 in the spray frame 8 is perpendicular to the movement direction of the spray frame 8 and the scraper assembly 6 relative to the resin pool 1.

[0035] By arranging the inkjet frame 8 and the scraper assembly 6 together above the resin pool 1 and enabling them to reciprocate along the resin pool 1, the scraper assembly 6 and the color nozzle 14 in the inkjet frame 8 can fully cover the printing area, so that when the printer prints a three-dimensional part, it can be fully colored. The color nozzle 14 can move longitudinally along the resin pool 1 with the inkjet frame 8, and can also move transversely relative to the resin pool 1 in the inkjet frame 8.

[0036] The above-mentioned SLA light-curing 3D printer with auxiliary inkjet device for color printing can obtain a colored three-dimensional object. The specific method is as follows:

[0037] (1) The auxiliary spraying device also sprays UV resin, but the viscosity is lower and it can also be cured by laser irradiation.

[0038] (2) The CMYK 4-color UV resin sprayed by the auxiliary printing device is mixed with four-color ink droplets in different proportions to obtain the required color.

[0039] (3) Before each layer starts printing, the auxiliary spraying device is used to spray a layer of colored UV resin along a circle of the current layer slice contour.

[0040] (4) The laser scans along the circle of colored UV resin to solidify it.

[0041] (5) The lifting platform 4 descends by one layer thickness, and the scraper assembly 6 scrapes the resin liquid that flows up and then performs laser scanning and curing as needed.

[0042] (6) Repeat this process to obtain a colorful three-dimensional object.

[0043] The auxiliary printing device shares the original printing software of the SLA light-curing 3D printer. Each layer of the slice is divided into two areas, one is the main area, which is cured using the SLA method; the other is the auxiliary area, which is the contour area that needs to be colored. The color UV resin is sprayed by the color nozzle in the auxiliary printing device and then laser scanned and cured.

[0044] Furthermore, a pair of second slide rails 20 arranged in parallel are provided on both sides of the table of the resin pool 1, and the scraper assembly 6 and the spray painting frame 8 are connected to the pair of second slide rails 20 through a plurality of second sliders 21, and the plurality of second sliders 21 are electric sliders.

[0045] The resin pool 1 includes a pool body arranged on a bracket, and a table surface is arranged around the pool body, and the table surface can be used to install some moving parts, such as the second slide rail. The second slide block can reciprocate along the second slide rail, thereby driving the scraper assembly and the inkjet frame to move.

[0046] In some embodiments, a position sensor is further provided above the spray painting frame 8, which can monitor the distance and position relationship between the spray painting frame and the scraper assembly in real time.

[0047] Furthermore, the scraper assembly 6 includes a scraper mounting plate 601 arranged across the resin pool, and a scraper 602 extending into the resin pool is connected below the scraper mounting plate 601. The length of the scraper 602 is smaller than the lateral dimension of the resin pool 1 and larger than the lateral dimension of the lifting platform 4, so that the scraper 602 can move in the resin pool 1 and can fully cover the substrate on the lifting platform 4 so as to scrape the resin liquid on the substrate flat.

[0048] In some embodiments, a substrate 27 with a porous structure is provided on the lifting platform 4, and the substrate 27 is used to place the part 7 to be formed.

[0049] Furthermore, a horizontal support frame 22 is provided on one side of the table top of the resin pool 1, and a vertical connecting plate 23 is provided on the horizontal support frame 22. One side of the vertical connecting plate 23 is connected to a lifting screw 24 through a plurality of second screw support bearing seats 25. A second screw sleeve is provided on the lifting screw 24, and the second screw sleeve is connected to the lifting platform 4 through a lifting platform connecting plate.

[0050] The setting of the horizontal support frame 22 is convenient for connecting the lifting components that drive the lifting platform to move up and down. A second driving motor 26 connected to the lifting screw rod 24 is also provided above the vertical connecting plate 23 to drive the lifting screw rod 24 to rotate, so that the second screw rod sleeve drives the lifting platform 4 to move up and down.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary inkjet device for color printing, characterized in that: It comprises a movably mounted inkjet printing frame, wherein a rectangular through slot is arranged in the inkjet printing frame, and first slide rails are respectively arranged on both sides of the rectangular through slot, and a pair of the first slide rails are connected with a nozzle mounting plate spanning the rectangular through slot via a plurality of first sliders, and a nozzle mounting slot passing downward through the rectangular through slot is arranged in the nozzle mounting plate, and a plurality of color nozzles are installed in the nozzle mounting slot; a first driving assembly is also arranged on the inkjet printing frame, and the first driving assembly is connected to and drives the nozzle mounting plate.

2. The auxiliary inkjet device for color printing according to claim 1, characterized in that: The color nozzles are four UV resin nozzles, which are arranged side by side and contain four colors of CMYK.

3. The auxiliary inkjet device for color printing according to claim 1, characterized in that: The first driving assembly includes a nozzle moving screw rod arranged parallel to the first slide rail, and both ends of the nozzle moving screw rod are respectively installed on the inkjet frame through a first screw rod support bearing seat, and at least one end of the nozzle moving screw rod is also connected to a first driving motor, and the first screw rod sleeve on the nozzle moving screw rod is connected to the nozzle mounting plate through a nozzle connecting plate.

4. A SLA light-curing 3D printer having the auxiliary inkjet device for color printing according to any one of claims 1 to 3, characterized in that: It includes a resin pool and a curing laser arranged above the resin pool. A lifting platform that can be raised and lowered is arranged in the resin pool. A scraper assembly that spans the lifting platform is arranged above the resin pool. The scraper assembly is arranged to move horizontally along the upper surface of the resin pool. The inkjet frame that moves horizontally along the upper surface of the resin pool is arranged on one side of the scraper assembly. The moving direction of the nozzle mounting plate is perpendicular to the moving directions of the inkjet frame and the scraper assembly.

5. The SLA light-curing 3D printer of the auxiliary inkjet device for color printing according to claim 4, characterized in that: A pair of second slide rails arranged in parallel are provided on both sides of the table of the resin pool, and the scraper assembly and the spray painting frame are connected to the pair of second slide rails through a plurality of second sliders, and the plurality of second sliders are electric or pneumatic sliders.

6. The SLA light-curing 3D printer of the auxiliary inkjet device for color printing according to claim 4, characterized in that: The scraper assembly includes a scraper mounting plate arranged across the resin pool, a scraper extending into the resin pool is connected below the scraper mounting plate, and the length of the scraper is smaller than the lateral dimension of the resin pool and larger than the lateral dimension of the lifting platform.

7. The SLA light-curing 3D printer of the auxiliary inkjet device for color printing according to claim 4, characterized in that: The lifting platform is provided with a substrate with a porous structure, and the substrate is used to place the parts to be formed.

8. The SLA light-curing 3D printer of the color printing auxiliary inkjet device according to claim 4, characterized in that: A horizontal support frame is provided on one side of the resin pool, and a vertical connecting plate is provided on the horizontal support frame. One side of the vertical connecting plate is connected to a lifting screw through a plurality of second screw support bearing seats. A second screw sleeve is provided on the lifting screw, and the second screw sleeve is connected to the lifting platform through a lifting platform connecting plate. A second driving motor connected to the lifting screw is also provided above the vertical connecting plate.

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