Detection device applied to leveling of light machine of photocuring printer

Abstract

The utility model discloses a detection device applied to leveling of a light machine of a photocuring printer, and belongs to the technical field of 3D printing, the detection device is characterized by comprising a rack, the light machine arranged on the rack and a transparent material disc arranged on the rack, and a glass marking sheet is arranged on the upper surface of the transparent material disc; transparent calibration paper is arranged on the glass calibration sheet, five identification areas are arranged on the calibration paper, one identification area is arranged at the center of the calibration paper, and the other four identification areas are arranged at the corners of the calibration paper respectively and are symmetrically arranged along the center line of the upper surface of the calibration paper. The optical machine leveling detection device has the advantages that a complicated and high-cost leveling detection means becomes simple and feasible, the cost and the technical difficulty of optical machine leveling detection are greatly reduced, the optical machine leveling detection device is convenient to operate and practice, and the requirement for professional ability of operators is effectively lowered.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and more specifically to a detection device used for photomechanical leveling in a photopolymer printer. Background Technology

[0002] Stereopolymerization is a widely used 3D printing technology in modern science and technology. It involves scanning the contours of the desired part's cross-sections with photosensitive resin under ultraviolet light, triggering a photopolymerization reaction that creates multiple layers of thin cross-sections, ultimately resulting in a complete part model. Stereopolymerization offers extremely high precision and produces very smooth surfaces, making it increasingly popular for printing part models.

[0003] Leveling and testing in photopolymer 3D printers has always been a major challenge in the field. This involves checking the leveling between the optical engine and the material tray. If the optical engine and material tray are not parallel, it will lead to poor printed structures. Most common leveling and testing methods on the market require a complete set of optical inspection and calibration instruments to determine the tilt of the plane by measuring the distance between various measurement points and the light source. This approach is costly, and for general 3D printer users or manufacturers, the cost-effectiveness and feasibility of using this method for leveling and testing are extremely low. Furthermore, the method of detecting the tilt of the plane through multiple measurement points requires a high level of technical skill from the operator, making it a difficult and challenging process.

[0004] In view of this, the inventors have designed a detection mechanism that detects whether the optical engine is leveled by measuring the overlap of the projection contours of the ultraviolet fluorescent liquid glass standard with transparent calibration paper and the optical engine. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a detection device for optical engine leveling in a UV curing printer. Its advantages are that the operator can determine the direction of optical engine offset by observing the overlap between the outline of the calibration paper pattern and the outline of the optical engine projection and the projection shape through the eyepiece. Moreover, this method makes the complicated and costly leveling detection method simple and feasible, greatly reducing the cost and technical difficulty of optical engine leveling detection, making it easy to learn and practice, and effectively reducing the professional skills required of the operator.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a detection device for leveling the optical engine of a UV curing printer, comprising a frame, an optical engine mounted on the frame, and a transparent material tray mounted on the frame. A glass plate is provided on the upper surface of the transparent material tray, and transparent calibration paper is provided on the glass plate. The calibration paper has five marking areas, one of which is located at the center of the calibration paper, and the other four marking areas are respectively located at the corners of the calibration paper and are symmetrically arranged along the center line of the upper surface of the calibration paper. An eyepiece for observing the calibration paper is provided on the frame.

[0007] By adopting the above technical solution, before leveling and testing the optical engine and the transparent material tray, a glass standard is placed on the transparent material tray, and then calibration paper is placed on the upper surface of the glass standard. The optical engine is then turned on, and the ultraviolet light projected by the optical engine shines onto the transparent material tray and through the glass standard onto the calibration paper. When leveling and testing the optical engine and the transparent material tray is required, the eyepiece can be used to observe the calibration paper and the glass standard vertically from top to bottom. If no ghosting appears in the five marked areas observed through the eyepiece, it indicates that the leveling of the optical engine and the transparent material tray is correct. If ghosting appears in the five marked areas observed through the eyepiece, it indicates that the leveling of the optical engine and the transparent material tray is problematic and needs to be readjusted.

[0008] In summary, by placing glass plates and calibration paper sequentially from bottom to top on a transparent material tray, and then observing the image after the optical engine is illuminated through an eyepiece, the leveling status of the optical engine and the transparent material tray can be determined by whether there are ghosting shadows in the image. This allows the operator to observe the overlap between the outline of the calibration paper pattern and the outline of the optical engine projection through the eyepiece and determine the direction of optical engine deviation. Moreover, this method simplifies the complex and costly leveling and testing process, greatly reducing the cost and technical difficulty of optical engine leveling and testing, making it easy to learn and practice, and effectively reducing the professional skills required of operators.

[0009] The present invention is further configured such that: the glass label includes a first glass sheet, a second glass sheet, an ultraviolet fluorescent liquid disposed between the first glass sheet and the second glass sheet, and a UV adhesive disposed at the edges of the first glass sheet and the second glass sheet for sealing the first glass sheet and the second glass sheet, wherein the space between the first glass sheet, the second glass sheet and the UV adhesive is formed by evacuating the air in the evacuation tank to create a vacuum environment.

[0010] By adopting the above technical solution, when it is necessary to manufacture glass labels, the edges of the first glass sheet and the second glass sheet can be glued together with UV adhesive first, then the ultraviolet fluorescent liquid can be introduced between the first glass sheet and the second glass sheet, and a vacuum environment can be formed by evacuating the air in the tank to remove air bubbles in the fluorescent liquid. Finally, it can be sealed with UV adhesive to complete the manufacturing of the glass label.

[0011] The present invention is further provided with a fixing rope between the frame and the eyepiece.

[0012] By adopting the above technical solution and setting up the fixing rope, the eyepiece is prevented from being lost, which helps to fix the eyepiece on the frame and does not affect its use.

[0013] The present invention is further configured such that: four gravity blocks are provided on the calibration paper for fixing it to the glass standard, and the four gravity blocks are respectively located at the corners of the calibration paper.

[0014] By adopting the above technical solution, the setting of the gravity block can fix the calibration paper on the glass standard, avoiding the movement of the calibration paper affecting the observation results when observing through the eyepiece.

[0015] In summary, this utility model has the following advantages:

[0016] 1. By placing glass plates and calibration paper sequentially from bottom to top on a transparent material tray, and observing the image after the optical engine is illuminated through an eyepiece, the leveling status of the optical engine and the transparent material tray can be determined by whether there is a ghosting in the image. This allows the operator to observe the overlap between the outline of the calibration paper pattern and the outline of the optical engine projection through the eyepiece and determine the direction of optical engine offset. Moreover, this method simplifies the complicated and costly leveling and testing process, greatly reducing the cost and technical difficulty of optical engine leveling and testing, making it easy to learn and practice, and effectively reducing the professional skills required of the operators.

[0017] 2. By setting a fixing rope, the eyepiece is prevented from being lost, which helps to fix the eyepiece on the frame and does not affect its use.

[0018] 3. By setting a gravity block, the calibration paper can be fixed on the glass standard, avoiding the movement of the calibration paper from affecting the observation results when observing through the eyepiece. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0020] Figure 2 This is a schematic diagram of the structure of the glass standard sheet in this embodiment;

[0021] Figure 3 This is a schematic diagram of the calibration paper in this embodiment;

[0022] Figure 4 This is a schematic diagram of the initial detection stage in this embodiment;

[0023] Figure 5 This is a schematic diagram of the intermediate detection stage in this embodiment;

[0024] Figure 6This is a schematic diagram of the detection end stage in this embodiment.

[0025] Explanation of reference numerals in the attached diagram: 1. Frame; 2. Optical engine; 3. Transparent material tray; 4. Glass standard; 41. First glass plate; 42. Second glass plate; 43. Ultraviolet fluorescent liquid; 44. UV adhesive; 5. Calibration paper; 6. Marking area; 7. Fixing rope; 8. Gravity block; 9. Eyepiece. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] A detection device used for leveling the optical engine 2 of a UV curing printer, such as... Figure 1 , 3 As shown, the system includes a frame 1, an optical engine 2 mounted on the frame 1, and a transparent material tray 3 mounted on the frame 1. A glass standard 4 is placed on the upper surface of the transparent material tray 3, and the size of the glass standard 4 is two-thirds of the size of the transparent material tray 3. A transparent calibration paper 5 is placed on the glass standard 4, and the size of the calibration paper 5 is four-fifths of the size of the glass standard 4. Five marking areas 6 are provided on the calibration paper 5. One marking area 6 is installed at the center of the calibration paper 5, and the other four marking areas 6 are installed at the corners of the calibration paper 5 and are symmetrically arranged along the center line of the upper surface of the calibration paper 5. An eyepiece 9 for observing the calibration paper 5 is placed on the frame 1.

[0028] Furthermore, a fixing rope 7 is provided between the frame 1 and the eyepiece 9 to prevent the eyepiece 9 from being lost, which helps to fix the eyepiece 9 on the frame 1 and does not affect its use.

[0029] It is worth mentioning that four gravity blocks 8 are placed on the calibration paper 5 to fix it to the glass standard 4. The four gravity blocks 8 are installed at the corners of the calibration paper 5, which can fix the calibration paper 5 to the glass standard 4 and prevent the calibration paper 5 from moving and affecting the observation results when observed through the eyepiece 9.

[0030] First, place the glass standard 4 on the transparent material tray 3. Then, place the calibration paper 5 on the upper surface of the glass standard 4. Next, turn on the optical engine 2. The ultraviolet light projected by the optical engine 2 shines on the transparent material tray 3 and through the glass standard 4 onto the calibration paper 5. The ultraviolet light projected by the optical engine 2 causes the fluorescent material in the ultraviolet fluorescent liquid 43 to produce visible light with a longer wavelength, thus revealing its projection outline. Figure 4 As shown, this is the initial projection state of the optical engine 2 before leveling. Through eyepiece 9, it can be seen that the outlines of the right and lower parts of the image are blurry and too wide, while the outlines of the left and upper parts are clear and too thin. At this point, it is determined that the right and lower parts of the optical engine 2 are not in focus, therefore, the following conclusion can be drawn: the lower right part of the plane of the optical engine 2 is too low, and the upper left part is too high. After adjusting the upper and lower planes of the optical engine 2, the desired result is achieved as shown... Figure 5The state shown is as follows. At this time, through eyepiece 9, it can be observed that the left outline is clear and thin, while the right outline is blurry and wide. The conclusion is that the left side of the optical-mechanical 2 plane is too high and the right side is too low. After adjustment, the projected outline of the optical-mechanical 2 is as follows. Figure 6 As shown. Observe the pixel grid overlap between the projection outline and the calibration paper 5 outline through eyepiece 9. Theoretically, when they are completely overlapped, the optical engine 2 plane is parallel to the glass plane.

[0031] like Figure 2 As shown, the glass label 4 includes a first glass sheet 41, a second glass sheet 42, an ultraviolet fluorescent liquid 43 installed between the first glass sheet 41 and the second glass sheet 42, and UV adhesive 44 used to seal the edges of the first glass sheet 41 and the second glass sheet 42. The space between the first glass sheet 41, the second glass sheet 42, and the UV adhesive 44 is created by evacuating air from a vacuum chamber to form a vacuum environment. When manufacturing the glass label 4, the edges of the first glass sheet 41 and the second glass sheet 42 are first glued together with UV adhesive 44. Then, the ultraviolet fluorescent liquid 43 is introduced between the first glass sheet 41 and the second glass sheet 42. A vacuum environment is then created by evacuating air from a vacuum chamber to remove air bubbles from the fluorescent liquid. Finally, the glass label 4 is sealed with UV adhesive 44 to complete the manufacturing of the glass label 4.

[0032] The working process and beneficial effects of this utility model are as follows: Before leveling and testing the optical engine 2 and the transparent material tray 3, a glass plate 4 is placed on the transparent material tray 3, and then a calibration paper 5 is placed on the upper surface of the glass plate 4. Then, the optical engine 2 is turned on, and the ultraviolet light projected by the optical engine 2 shines on the transparent material tray 3 and through the glass plate 4 onto the calibration paper 5. When leveling and testing the optical engine 2 and the transparent material tray 3 is required, the eyepiece 9 can be used to observe the calibration paper 5 and the glass plate 4 vertically from top to bottom. If no ghost image appears in the five marked areas 6 observed by the eyepiece 9, it indicates that the leveling of the optical engine 2 and the transparent material tray 3 is not a problem. If a ghost image appears in the five marked areas 6 observed by the eyepiece 9, it indicates that the leveling of the optical engine 2 and the transparent material tray 3 is a problem and needs to be readjusted.

[0033] In summary, by placing glass plates 4 and calibration paper 5 sequentially from bottom to top on the transparent material tray 3, and observing the image after illumination by the optical engine 2 through the eyepiece 9, the leveling status of the optical engine 2 and the transparent material tray 3 can be determined by whether there is a ghosting in the image. This allows the operator to observe the overlap between the pattern outline of the calibration paper 5 and the projection outline of the optical engine 2 through the eyepiece 9, and determine the offset direction of the optical engine 2 by observing the projection shape. Moreover, this method simplifies the complex and costly leveling and testing process, greatly reducing the cost and technical difficulty of leveling and testing the optical engine 2, making it easy to learn and practice, and effectively reducing the professional skills required of the operators.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A detection device for leveling the optical engine (2) of a photopolymer printer, comprising a frame (1), an optical engine (2) mounted on the frame (1), and a transparent material tray (3) mounted on the frame (1), characterized in that: A glass plate (4) is provided on the upper surface of the transparent material tray (3). A transparent calibration paper (5) is provided on the glass plate (4). Five marking areas (6) are provided on the calibration paper (5). One of the marking areas (6) is located at the center of the calibration paper (5). The other four marking areas (6) are located at the corners of the calibration paper (5) and are symmetrically arranged along the center line of the upper surface of the calibration paper (5). An eyepiece (9) for observing the calibration paper (5) is provided on the frame (1).

2. The detection device for leveling the optical engine (2) of a photopolymer printer according to claim 1, characterized in that: The glass plate (4) includes a first glass plate (41), a second glass plate (42), an ultraviolet fluorescent liquid (43) disposed between the first glass plate (41) and the second glass plate (42), and a UV adhesive (44) disposed at the edge of the first glass plate (41) and the second glass plate (42) for sealing the first glass plate (41) and the second glass plate (42). The space between the first glass plate (41), the second glass plate (42) and the UV adhesive (44) is formed by evacuating the air in the evacuation tank to create a vacuum environment.

3. The detection device for leveling the optical engine (2) of a photopolymer printer according to claim 1, characterized in that: A fixing rope (7) is provided between the frame (1) and the eyepiece (9).

4. The detection device for leveling the optical engine (2) of a photopolymer printer according to claim 1, characterized in that: The calibration paper (5) is provided with four gravity blocks (8) for fixing it to the glass standard (4), and the four gravity blocks (8) are respectively located at the corners of the calibration paper (5).

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