3DP nozzle state detection device

Abstract

The utility model discloses a 3DP nozzle state detection device, and belongs to the field of 3DP ink-jet printing. The device comprises a spray inspection paper conveying mechanism, a printing nozzle mechanism, an image acquisition mechanism and an upper computer, the spray inspection paper conveying mechanism comprises a conveying rack, an unwinding roller, a driving motor and a spray inspection paper clamping output assembly, the unwinding roller is rotationally installed on one side of the lower portion of the conveying rack, the driving motor is installed on the other side of the lower portion of the conveying rack, and the spray inspection paper clamping output assembly is in transmission connection with the output end of the driving motor; the printing spray head mechanism and the image acquisition mechanism are sequentially arranged in the conveying direction of the spray inspection paper conveying mechanism and are correspondingly arranged between the unwinding roller and the spray inspection paper clamping and outputting assembly; and the driving motor, the printing nozzle mechanism and the image acquisition mechanism are in electric signal connection with the upper computer. The device can automatically print, collect and detect images, judges whether the nozzle state is abnormal or not according to the image state, and improves the nozzle state detection efficiency and the nozzle detection recognition rate.

Description

Technical Field

[0001] The utility model relates to the field of 3DP inkjet printing, and more specifically to a 3DP nozzle state detection device using a rapidly curable adhesive. Background Art

[0002] 3DP is 3D printing. 3D printing technology has been widely used in the fields of medicine, automobile, aerospace, construction and clothing due to its advantages of fast molding speed, low cost and material saving. The materials usually used in 3D printing have a short curing time. This leads to the fact that during the interval between printing, the print head of the 3D printer is often not protected in time or left for a long time, resulting in the evaporation of the binder and clogging the nozzle hole, making the print head in poor condition during printing, resulting in problems such as ink breakage, slanted spraying, and even blanking, which seriously affects the strength and quality of the molded parts.

[0003] At present, most of the nozzle inspection methods are for technicians to manually identify the nozzle inspection status diagram to judge the nozzle status and printing quality. The inspection efficiency is poor and it is not suitable for automated and intelligent unmanned processing workshops.

[0004] Therefore, how to provide a 3DP nozzle status detection device with automated and efficient spray inspection and identification is a technical problem that those skilled in the art need to solve urgently. Utility Model Content

[0005] In view of this, the utility model aims to provide a device capable of automatic spray inspection and automatic detection, so as to realize the automation of spray inspection and improve the efficiency of spray inspection identification.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A DP nozzle state detection device comprises: a spray inspection paper conveying mechanism, a printing nozzle mechanism, an image acquisition mechanism and a host computer;

[0008] The inspection paper conveying mechanism includes a conveying frame, a reeling roller, a driving motor and an inspection paper clamping and outputting assembly, wherein the reeling roller is rotatably mounted on one side of the lower part of the conveying frame, the driving motor is mounted on the other side of the lower part of the conveying frame, and the inspection paper clamping and outputting assembly is mounted on the other side of the lower part of the conveying frame and is transmission-connected to the output end of the driving motor;

[0009] The printing nozzle mechanism and the image acquisition mechanism are arranged in sequence along the conveying direction of the inspection paper conveying mechanism and correspond to between the unwinding roller and the inspection paper clamping and outputting component;

[0010] The driving motor, the printing head mechanism, and the image acquisition mechanism are connected to the host computer by electrical signals.

[0011] The beneficial effects that can be achieved by the utility model are as follows: a printing nozzle mechanism and an image acquisition mechanism are installed in sequence corresponding to the conveying direction of the inkjet inspection paper conveying mechanism, a controller can control the printing nozzle mechanism to print on the inkjet inspection paper, the printed inkjet inspection paper is conveyed to the image acquisition mechanism to collect the inkjet inspection image and the inkjet inspection image is processed by the image processing mechanism, and whether the nozzle status is normal is judged according to the image processing result.

[0012] Furthermore, the inspection paper conveying mechanism also includes an inspection paper reversing roller, and the inspection paper reversing roller includes a first reversing roller and a second reversing roller which are both arranged parallel to the unwinding roller, the first reversing roller is rotatably installed on the conveying frame near the unwinding roller and corresponds to the top of the unwinding roller, the second reversing roller is rotatably installed on the other side of the conveying frame and corresponds to the top of the inspection paper clamping and output component, the printing nozzle mechanism is correspondingly arranged above between the first reversing roller and the second reversing roller, and the image acquisition mechanism is correspondingly arranged between the second reversing roller and the inspection paper clamping and output component to capture the nozzle printing status image on the inspection paper.

[0013] Furthermore, the print head mechanism includes a printer frame and a print head, the print head is installed on the printer frame between the first reversing roller and the second reversing roller, and the print head is electrically connected to the host computer.

[0014] Furthermore, a paper press is provided, which is fixed on the printer frame between the first reversing roller and the second reversing roller. The paper press is provided with ink outlet holes, and the print head is arranged corresponding to the ink outlet holes.

[0015] Furthermore, the image acquisition mechanism includes an acquisition frame and an image acquisition camera, the image acquisition camera is installed on the acquisition frame and corresponds to the position arrangement of the inspection paper between the second reversing roller and the inspection paper clamping output component, and the image acquisition camera is electrically connected to the host computer.

[0016] Furthermore, it also includes a fill light, which is arranged correspondingly around the image acquisition camera.

[0017] Furthermore, an elastic pressing assembly for pressing the inspection paper on the first reversing roller is provided, and the elastic pressing assembly includes a pressure plate, a pressure block, a plurality of first sliding rods, a plurality of nuts and a plurality of first springs. The plurality of first sliding rods are arranged axially perpendicular to the first reversing roller and one end is fixed to the conveyor frame. The pressure plate is slidably mounted on the plurality of first sliding rods. The pressure block is fixed on the plate surface of the pressure plate close to the first reversing roller and the pressure block can abut against the first reversing roller. An external thread is provided on the end of each of the first sliding rods away from the first reversing roller. The nut is threadedly mounted on the external thread of the first sliding rod. The first spring is sleeved on the first sliding rod between the nut and the pressure plate.

[0018] Furthermore, the inspection paper clamping and output assembly includes an active roller and a pressure roller which are arranged parallel to the unwinding roller; the active roller is rotatably mounted on the conveyor frame corresponding to the lower portion of the second reversing roller and is transmission-connected to the output end of the drive motor; the pressure roller is mounted on the conveyor frame below the active roller; and a conveying gap for conveying the inspection paper is provided between the pressure roller and the active roller.

[0019] Furthermore, the pressure roller includes a pressure roller shaft and a pressure roller cylinder, the pressure roller shaft is arranged parallel to the active roller and connected to the conveying frame corresponding to below the active roller, the pressure roller cylinder is rotatably sleeved on the pressure roller shaft and the conveying gap is provided between the pressure roller cylinder and the active roller.

[0020] Furthermore, an adjustment component for adjusting the conveying gap is also provided, and the adjustment component includes an adjustment plate, an adjustment bolt, a second sliding rod, a baffle and a second spring, and two elongated adjustment holes are symmetrically provided on the conveying frame, and the two ends of the pressure roller shaft are correspondingly located in the elongated adjustment holes, and the adjustment plate is correspondingly located below the bottom wall of the conveying frame, and the adjusting bolt is arranged along the length direction of the elongated adjustment hole and its threaded end passes through the adjustment plate and is threadedly connected to the bottom wall of the conveying frame, and sliding holes are provided at both ends of the adjustment plate, and two second sliding rods are arranged along the length direction of the elongated adjustment hole, one end of which is connected to the pressure roller shaft, and the other end slides through the bottom wall of the conveying frame and the sliding hole to connect the baffle, and the second spring is sleeved on the second sliding rod between the pressure roller shaft and the bottom wall of the conveying frame.

[0021] It can be seen from the above technical solution that, compared with the prior art, the utility model discloses a 3DP nozzle status detection device, which can automatically print, collect and detect images, and judge whether there is any abnormality in the nozzle status according to the image status, thereby improving the nozzle status detection efficiency and the nozzle inspection recognition rate; the nozzle inspection paper transported by the nozzle inspection paper conveying mechanism of the utility model has high flatness and is not prone to wrinkles, which effectively avoids the detection result being affected by the unevenness of the nozzle inspection paper during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 The present invention is a schematic structural diagram of a 3DP nozzle status detection device provided by the utility model.

[0024] Figure 2 This is a structural schematic diagram of the inspection paper conveying mechanism provided by the utility model.

[0025] Figure 3 This is a structural schematic diagram of the inspection paper conveying mechanism provided by the utility model.

[0026] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A.

[0027] Figure 5 This is a structural schematic diagram of the inspection paper conveying mechanism provided by the utility model.

[0028] Figure 6 This is a schematic diagram of the structure of the inspection paper clamping and outputting component provided by the utility model.

[0029] Figure 7 This is a structural schematic diagram of the image acquisition mechanism provided by the utility model.

[0030] In the figure:

[0031] 1. Inspection paper conveying mechanism, 11. Conveying frame, 12. Unwinding roller, 13. Driving motor, 14. Inspection paper clamping and outputting assembly, 141. Active roller, 142. Pressing roller, 15. Inspection paper reversing roller, 151. First reversing roller, 152. Second reversing roller, 16. Elastic pressing assembly, 161. Pressing plate, 162. Pressing block, 163. First slide bar, 164. Nut, 165. First spring, 17. Adjusting assembly, 171. Adjusting plate, 172. Adjusting bolt, 173. Second slide bar, 174. Baffle, 175. Second spring;

[0032] 2. Image acquisition mechanism; 21. Acquisition rack; 22. Image acquisition camera; 23. Fill light;

[0033] 3. Press paperboard. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments 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.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] See also Figure 1-Figure 7 , the embodiment of the utility model discloses a 3DP nozzle state detection device, including: a nozzle inspection paper conveying mechanism 1, a printing nozzle mechanism, an image acquisition mechanism 2 and a host computer;

[0038] The inspection paper conveying mechanism 1 comprises a conveying frame 11, a reel 12, a driving motor 13 and an inspection paper clamping and outputting assembly 14. The reel 12 is rotatably mounted on one side of the lower part of the conveying frame 11, the driving motor 13 is mounted on the other side of the lower part of the conveying frame 11, and the inspection paper clamping and outputting assembly 14 is mounted on the other side of the lower part of the conveying frame 11 and is transmission-connected to the output end of the driving motor 13.

[0039] The print head mechanism and the image acquisition mechanism 2 are arranged in sequence along the conveying direction of the inspection paper conveying mechanism 1 and correspond to between the unwinding roller 12 and the inspection paper clamping and outputting component 14;

[0040] The driving motor 13, the printing nozzle mechanism, and the image acquisition mechanism 2 are all connected to the upper computer via electrical signals.

[0041] The beneficial effects that can be achieved by the utility model are as follows: a printing nozzle mechanism and an image acquisition mechanism 2 are installed in sequence corresponding to the conveying direction of the inspection paper conveying mechanism 1, a controller can control the printing nozzle mechanism to print on the inspection paper, the inspection paper after printing is conveyed to the image acquisition mechanism 2 to collect the inspection image and the inspection image is processed by the host computer, and whether the nozzle status is normal is judged according to the image processing result.

[0042] In a specific example, the driving motor 13 is a reduction motor, so that the conveying speed of the inspection paper can be adjusted to a speed suitable for printing.

[0043] In a specific example, see Figure 2 The inspection paper conveying mechanism 1 also includes an inspection paper reversing roller 15, which includes a first reversing roller 151 and a second reversing roller 152, both of which are arranged parallel to the unwinding roller 12. The first reversing roller 151 is rotatably mounted on the side of the conveying frame 11 close to the unwinding roller 12 and corresponds to the top of the unwinding roller 12. The second reversing roller 152 is rotatably mounted on the other side of the conveying frame 11 and corresponds to the top of the inspection paper clamping and outputting component 14. The print head mechanism is correspondingly arranged above the first reversing roller 151 and the second reversing roller 152. The image acquisition mechanism 2 is correspondingly arranged between the second reversing roller 152 and the inspection paper clamping and outputting component 14 to collect the print head printing state image on the inspection paper. The transport direction of the inspection paper is converted by the reversing component 15, so that the print head mechanism and the image acquisition mechanism 2 are in different directions, so as to prevent interference during the printing process from affecting the printing effect, thereby affecting the nozzle state detection result.

[0044] In a specific example, the print head mechanism includes a printer frame and a print head, the print head is mounted on the printer frame between the first reversing roller 151 and the second reversing roller 152, and the print head is electrically connected to the host computer. The host computer can control the print head to automatically print ink.

[0045] Specifically, Figure 1 As shown, a paper pressing plate 3 is also provided, which is fixed on the printer frame between the first reversing roller 151 and the second reversing roller 152. The paper pressing plate 3 is provided with an ink outlet hole 31, and the print head is arranged corresponding to the ink outlet hole 31. The paper pressing plate 3 can make the inspection paper flat to prevent the wrinkles of the inspection paper from affecting the printing.

[0046] In a specific example, see Figure 7 The image acquisition mechanism 2 includes an acquisition frame 21 and an image acquisition camera 22. The image acquisition camera 22 is mounted on the acquisition frame 21 and arranged corresponding to the position of the inspection paper between the second reversing roller 152 and the inspection paper clamping output component 14, and the image acquisition camera 22 is electrically connected to the host computer. The image acquisition camera 22 captures the inspection image and transmits the inspection image to the host computer for recognition and processing, and determines the state of the printhead according to the image recognition result.

[0047] Specifically, it also includes a fill light 23, which is arranged around the image acquisition camera 22. The fill light 23 is evenly filled with light for the inspection paper to be imaged, so that the image acquisition camera 22 can capture an image with uniform brightness.

[0048] In a specific example, if Figure 3 , Figure 4 , an elastic pressing assembly 16 for pressing the inspection paper on the first reversing roller 151 is also provided, and the elastic pressing assembly 16 includes a pressing plate 161, a pressing block 162, a plurality of first sliding rods 163, a plurality of nuts 164 and a plurality of first springs 165. The plurality of first sliding rods 163 are arranged axially perpendicular to the first reversing roller 151 and one end is fixed on the conveyor frame 11. The pressing plate 161 is slidably mounted on the plurality of first sliding rods 163. The pressing block 162 is fixed on the plate surface of the pressing plate 161 close to the first reversing roller 151 and the pressing block 162 can abut against the first reversing roller 151. An end of each first sliding rod 163 away from the first reversing roller 151 is provided with an external thread, the nut 164 is threadedly mounted on the external thread of the first sliding rod 163, and the first spring 165 is sleeved on the first sliding rod 163 between the nut 164 and the pressing plate 161. The distance between the pressing block 162 and the first reversing roller 151 is adaptively adjusted by the spring, so that the inspection paper and the first reversing roller 151 can roll closely, thereby preventing the inspection paper from wrinkling.

[0049] In a specific example, if Figure 2 , Figure 5 The inspection paper clamping and outputting assembly 14 includes an active roller 141 and a pressure roller 142 which are arranged parallel to the unwinding roller 12. The active roller 141 is rotatably mounted on the conveying frame 11 below the corresponding second reversing roller and is in transmission connection with the output end of the driving motor 13; the pressure roller 142 is rotatably mounted on the conveying frame 11 below the active roller 141; a conveying gap for conveying the inspection paper is provided between the pressure roller 142 and the active roller 141. The inspection paper is clamped and transported by the cooperation of the pressure roller 142 and the active roller 141 to ensure the flatness of the inspection paper during the output process.

[0050] In a specific example, the conveyor frame is further provided with a recovery roller (not shown in the figure) arranged parallel to the unwinding roller 12, which is used to reel and recover the inspection paper output by the inspection paper clamping and outputting assembly 14. In some other embodiments, the inspection paper output by the inspection paper clamping and outputting assembly 14 can also be conveyed to a cutting device for cutting for subsequent processing.

[0051] In a specific example, see Figure 6The pressure roller 142 includes a pressure roller shaft 1421 and a pressure roller cylinder 1422. The pressure roller shaft 1421 is arranged parallel to the active roller 141 and connected to the conveying frame 11 below the corresponding active roller 141. The pressure roller cylinder 1422 is rotatably sleeved on the pressure roller shaft 1421 and a conveying gap is provided between the pressure roller cylinder 1422 and the active roller 141.

[0052] In a specific example, an adjustment component 17 for adjusting the conveying gap is also provided, and the adjustment component 17 includes an adjustment plate 171, an adjustment bolt 172, a second slide bar 173, a baffle 174 and a second spring 175. Two elongated adjustment holes are symmetrically provided on the conveying frame 11, and the two ends of the pressure roller shaft 1421 are correspondingly located in the elongated adjustment holes. The adjustment plate 171 is correspondingly located below the bottom wall of the conveying frame 11. The adjustment bolt 172 is arranged along the length direction of the elongated adjustment hole and its threaded end passes through the adjustment plate 171 and is threadedly connected to the bottom wall of the conveying frame 11. Slide holes are provided at both ends of the adjustment plate 171. Two second slide bars 173 are arranged along the length direction of the elongated adjustment hole, one end of which is connected to the pressure roller shaft 1421, and the other end slides through the bottom wall of the conveying frame 11 and is connected to the baffle 174 through the slide hole. The second spring 175 is sleeved on the second slide bar 173 between the pressure roller shaft 1421 and the bottom wall of the conveying frame 11. The position of the pressure roller shaft 1421 can be roughly adjusted by screwing the adjusting bolt 172 to ensure that the rotational clearance is at an appropriate size. The position of the pressure roller shaft 1421 can be automatically fine-tuned through the cooperation of the second spring 175 and the second slide bar 173 to ensure the tightness of the inspection paper and the flatness of the inspection paper, thereby preventing the inspection paper from being wrinkled or skewed due to loose rolling clamping, thereby affecting the detection results.

[0053] The detection method of the nozzle status of the utility model is as follows:

[0054] First, fix the inspection paper roll on the unwinding roller 12, pass the inspection paper around the first reversing roller 151 and the second reversing roller 152 in turn, pass through and clamp between the active roller 141 and the pressure roller 142, turn on the drive motor 13, drive the active roller 141 to rotate, and pull the inspection paper to move.

[0055] Secondly, move the print head to between the first reversing roller 151 and the second reversing roller 152, print the inspection image on the inspection paper, and driven by the drive motor 13, the inspection paper printed with the inspection image moves to the front of the image acquisition mechanism 2, turn on the fill light 23 to fill light on the inspection paper, and the image acquisition device captures the image to obtain the original image of the inspection image.

[0056] Then, the host computer is used to perform recognition processing on the original image, and the state of the printhead is determined based on the recognition result.

[0057] The image processing process of the host computer includes:

[0058] S1: Perform enhancement preprocessing on the original image to remove some noise;

[0059] S2: Obtain the area where the spray inspection image is located in the original image, and perform affine transformation correction on it;

[0060] S3: Extract the spray inspection image and determine whether there are defects such as broken lines and blanks in the spray inspection image;

[0061] S4: If there is no defect, identify the next spray inspection image; if there is a defect, calculate the minimum circumscribed rectangle of the defect and mark it;

[0062] S5: Repeat the above recognition process until all spray inspection images are recognized and the detection results are given.

[0063] The specific steps of judging whether there are defects in the spray inspection image in step 3 include: first, performing image enhancement and median filtering on the corrected image to remove noise points, then extracting the internal contour of the spray inspection image, and obtaining the defect area through closing operations and calculating difference sets; finally, calculating the area and eliminating interference items to screen out defects that meet expectations.

[0064] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0065] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A 3DP nozzle status detection device, characterized in that: include: Inspection paper conveying mechanism (1), printing nozzle mechanism, image acquisition mechanism (2) and host computer; The inspection paper conveying mechanism (1) comprises a conveying frame (11), a reeling roller (12), a driving motor (13) and an inspection paper clamping and outputting assembly (14); the reeling roller (12) is rotatably mounted on one side of the lower part of the conveying frame (11); the driving motor (13) is mounted on the other side of the lower part of the conveying frame (11); and the inspection paper clamping and outputting assembly (14) is mounted on the other side of the lower part of the conveying frame (11) and is transmission-connected to the output end of the driving motor (13); The printing nozzle mechanism and the image acquisition mechanism (2) are arranged in sequence along the conveying direction of the inspection paper conveying mechanism (1) and correspond to between the unwinding roller (12) and the inspection paper clamping and output component (14); The driving motor (13), the printing head mechanism, and the image acquisition mechanism (2) are all connected to the host computer via electrical signals.

2. A 3DP nozzle status detection device according to claim 1, characterized in that: The inspection paper conveying mechanism (1) further comprises an inspection paper reversing roller (15), the inspection paper reversing roller (15) comprising a first reversing roller (151) and a second reversing roller (152) both arranged parallel to the unwinding roller (12), the first reversing roller (151) being rotatably mounted on one side of the conveying frame (11) close to the unwinding roller (12) and corresponding to the top of the unwinding roller (12), the second reversing roller (152) being rotatably mounted on the other side of the conveying frame (11) and corresponding to the top of the inspection paper clamping and outputting assembly (14), the printing nozzle mechanism being correspondingly arranged above the first reversing roller (151) and the second reversing roller (152), and the image acquisition mechanism (2) being correspondingly arranged between the second reversing roller (152) and the inspection paper clamping and outputting assembly (14) to acquire an image of the nozzle printing status on the inspection paper.

3. A 3DP nozzle status detection device according to claim 2, characterized in that: The printing head mechanism comprises a printing frame and a printing head, wherein the printing head is mounted on the printing frame between the first reversing roller (151) and the second reversing roller (152), and the printing head is electrically connected to the host computer.

4. A 3DP nozzle status detection device according to claim 3, characterized in that: A paper press (3) is also provided, the paper press (3) being fixed on the printer frame between the first reversing roller (151) and the second reversing roller (152), the paper press (3) being provided with an ink outlet hole (31), and the printing nozzle being arranged corresponding to the ink outlet hole (31).

5. A 3DP nozzle state detection device according to claim 2, characterized in that: The image acquisition mechanism (2) comprises an acquisition frame (21) and an image acquisition camera (22); the image acquisition camera (22) is mounted on the acquisition frame (21) and arranged corresponding to the position of the inspection paper between the second reversing roller (152) and the inspection paper clamping and output component (14); and the image acquisition camera (22) is electrically connected to the host computer.

6. A 3DP nozzle status detection device according to claim 5, characterized in that: It also includes a fill light (23), and the fill light (23) is arranged correspondingly around the image acquisition camera (22).

7. A 3DP nozzle status detection device according to claim 2, characterized in that: An elastic pressing assembly (16) for pressing the inspection paper on the first reversing roller (151) is also provided. The elastic pressing assembly (16) comprises a pressing plate (161), a pressing block (162), a plurality of first sliding rods (163), a plurality of nuts (164) and a plurality of first springs (165). The plurality of first sliding rods (163) are arranged perpendicular to the first reversing roller (151) and one end of the first sliding rods (163) is fixed on the conveyor frame (11). The pressing plate (161) is slidably mounted on the plurality of first sliding rods (163). The pressing block (162) is fixed on the plate surface of the pressure plate (161) close to the first reversing roller (151) and the pressure block (162) can abut against the first reversing roller (151), and each of the first slide bars (163) is provided with an external thread at one end away from the first reversing roller (151), and the nut (164) is threadedly installed on the external thread of the first slide bar (163), and the first spring (165) is sleeved on the first slide bar (163) between the nut (164) and the pressure plate (161).

8. A 3DP nozzle state detection device according to any one of claims 2 to 7, characterized in that: The inspection paper clamping and output assembly (14) comprises an active roller (141) and a pressure roller (142) which are arranged parallel to the unwinding roller (12); the active roller (141) is rotatably mounted on the conveying frame (11) below the corresponding second reversing roller, and is transmission-connected to the output end of the driving motor (13); the pressure roller (142) is rotatably mounted on the conveying frame (11) below the active roller (141); and a conveying gap for conveying the inspection paper is provided between the pressure roller (142) and the active roller (141).

9. A 3DP nozzle status detection device according to claim 8, characterized in that: The pressure roller (142) comprises a pressure roller shaft (1421) and a pressure roller cylinder (1422); the pressure roller shaft (1421) is arranged parallel to the active roller (141) and connected to the conveying frame (11) corresponding to the lower portion of the active roller (141); the pressure roller cylinder (1422) is rotatably sleeved on the pressure roller shaft (1421) and a conveying gap is provided between the pressure roller cylinder (1422) and the active roller (141).

10. A 3DP nozzle state detection device according to claim 9, characterized in that: An adjustment component (17) for adjusting the conveying gap is also provided, the adjustment component (17) comprising an adjustment plate (171), an adjustment bolt (172), a second slide bar (173), a baffle (174) and a second spring (175), two elongated adjustment holes are symmetrically provided on the conveying frame (11), the two ends of the pressure roller shaft (1421) are correspondingly located in the elongated adjustment holes, the adjustment plate (171) is correspondingly located below the bottom wall of the conveying frame (11), and the adjustment bolt (172) is arranged along the length direction of the elongated adjustment hole. The second spring (175) is mounted on the second slide bar (173) and its threaded end passes through the adjustment plate (171) and is threadedly connected to the bottom wall of the conveyor frame (11); sliding holes are provided at both ends of the adjustment plate (171); two second slide bars (173) are arranged along the length direction of the long strip adjustment hole; one end of the second slide bars (173) is connected to the pressure roller shaft (1421); the other end slides through the bottom wall of the conveyor frame (11) and the sliding hole to connect to the baffle (174); the second spring (175) is sleeved on the second slide bar (173) between the pressure roller shaft (1421) and the bottom wall of the conveyor frame (11).

Images