A rotary screen printing machine based on visual inspection

Abstract

The present invention belongs to the technical field of rotary screen printing machines, and in particular to a rotary screen printing machine based on visual inspection, comprising a printing machine body, a cleaning mechanism provided at the feed end of the top of the printing machine body, the cleaning mechanism comprising a mounting frame, a cleaning roller rotatably connected within the mounting frame, a variable speed motor fixedly connected to one end of the mounting frame, an output shaft of the variable speed motor fixedly connected to the end of the cleaning roller, an exhaust port provided at the other end of the cleaning roller, the exhaust port connected to a negative pressure generating mechanism, a plurality of groups of suction tubes and bristles distributed in an annular array are installed on the circumferential outer wall of the cleaning roller, the suction tubes and bristles are staggered, and the length of the suction tubes is shorter than the bristles, and the suction tubes are connected to the cavity inside the cleaning roller. In the present invention, the bristles of the cleaning roller in the cleaning mechanism cooperate with the negative pressure generating mechanism to quickly and thoroughly clean the fluff on the surface of the fabric, and the negative pressure generating mechanism promptly collects the cleaned fluff into a collection box, effectively preventing the fluff from falling onto the fabric again.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary screen printing machines, and in particular to a rotary screen printing machine based on visual detection. Background Art

[0002] In recent years, visual inspection technology has begun to be applied in textile printing and dyeing equipment. Through image acquisition and analysis, it can identify defects such as stains and damage on the surface of fabrics, providing data support for the printing process. As the market's requirements for the quality of printed products continue to increase, the cleanliness of the fabric surface has become one of the key factors affecting the printing effect. When processing fabrics, existing rotary screen printing machines often cause problems such as residual lint on the fabric surface, resulting in defects in the printed pattern and uneven color, affecting product quality and production efficiency.

[0003] To address the above issues, a Chinese patent application with authorization number CN216268124U discloses a rotary screen printing machine, which belongs to the technical field of rotary screen printing machines and includes a printing machine body, a magnetic roller fixedly mounted on the front of the printing machine body, a frame fixedly mounted on the front of the printing machine body, a brush roller rotatably mounted on the frame, and a hair-binding assembly provided on the front of the printing machine body. The hair-binding assembly includes a fixed frame fixedly mounted on the front of the printing machine body, and mounting frames rotatably mounted on the opposing surfaces of the two fixed frames. Although the existing technical problems have been solved, the following problems still exist:

[0004] In this technical solution, after the brush roller cleans the fluff from the cloth, the fluff will become more and more entangled on the brush roller and will fall back onto the cloth, so corresponding improvements are made to address this problem. Summary of the Invention

[0005] Based on the technical problems existing in the prior art, the present invention proposes a rotary screen printing machine based on visual detection.

[0006] The present invention proposes a rotary screen printing machine based on visual inspection, comprising a printing machine body, a cleaning mechanism provided at the feed end on the top of the printing machine body, the cleaning mechanism comprising a mounting frame, a cleaning roller rotatably connected in the mounting frame, one end of the mounting frame fixedly connected to a variable speed motor, the output shaft of the variable speed motor fixedly connected to the end of the cleaning roller, an exhaust port provided at the other end of the cleaning roller, the exhaust port connected to a negative pressure generating mechanism, a plurality of suction tubes and bristles distributed in a circular array are installed on the circumferential outer wall of the cleaning roller, the suction tubes and the bristles are staggered, and The length of the suction tube is shorter than the bristles, and the suction tube is connected to the cavity inside the cleaning roller; by passing the cloth through the cleaning roller and then connecting it to the printing roller for printing, the variable speed motor will drive the cleaning roller to rotate through the output shaft, and use the bristles to clean the fluff on the cloth. At the same time, the negative pressure generating mechanism will generate suction at the suction tube, and the fluff will be sucked into the cavity from the suction tube, and then enter the negative pressure generating mechanism through the exhaust port and be collected, thereby effectively cleaning the fluff on the surface of the cloth, and also preventing the fluff from falling onto the cloth again and adhering to and accumulating on the bristles.

[0007] Preferably, the negative pressure generating mechanism includes a shell fixedly connected to the top of the mounting frame, a negative pressure fan is installed in the shell, a collection box is buckled on the top of the shell, a connecting pipe is connected to the air inlet of the shell, and the other end of the connecting pipe is rotatably connected to the exhaust port; after the negative pressure fan is started, the suction force generated will suck the fluff from the cavity into the connecting pipe and then collect it into the collection box, and the collection box can be removed regularly to clean the fluff collected inside.

[0008] Preferably, the mounting frame is connected to a translation mechanism, which includes a pair of symmetrically distributed slide rails fixedly connected to the top of the printing machine body, an electric slider is slidably connected in the slide rails, and the mounting frame is fixedly connected between the two electric sliders; if the system detects that the fluff at a certain position on the cloth does not meet the normal cleaning requirements, the system will start the translation mechanism, and then the electric slider will drive the mounting frame in the direction of cloth movement at a speed greater than the cloth movement speed to catch up with the cloth and then move back, so that the position on the cloth that does not meet the normal cleaning requirements can continue to be cleaned.

[0009] Preferably, a rotary screen printing machine based on visual detection also includes: a lint residue collection module, installed on the mounting frame and tilted toward the lower area of ​​the cleaning roller, for real-time monitoring of the grayscale value of the fabric surface, and generating a lint residue rate coefficient through the control module; a load resistance collection module, installed on the power supply circuit of the variable speed motor, for real-time monitoring of the real-time working current of the variable speed motor, and generating a load fluctuation coefficient through the control module; the control module comprehensively analyzes the generated lint residue rate coefficient and load fluctuation coefficient, generates an evaluation coefficient, determines whether the lint at the current position of the fabric meets the normal cleaning requirements, compares the evaluation coefficient with a pre-set reference threshold, and controls the working status of the cleaning mechanism, negative pressure generating mechanism and translation mechanism according to the comparison result.

[0010] Preferably, the output end and input end of the fluff residue collection module and the output end and input end of the load resistance collection module are electrically connected to the input end and output end of the control module respectively, and the output end of the control module is electrically connected to the input end of the negative pressure fan, the input end of the variable speed motor and the input end of the electric slider respectively.

[0011] Preferably, the control module controls the working states of the cleaning mechanism, the negative pressure generating mechanism and the translation mechanism according to the comparison results in the following steps:

[0012] Real-time detection: The fluff residue acquisition module collects the grayscale value of the fabric surface; the load resistance acquisition module collects the real-time working current of the variable speed motor;

[0013] Coefficient calculation: The control module calculates the fluff residual rate coefficient, load fluctuation coefficient and evaluation coefficient;

[0014] Dynamic adjustment: If :Maintain current parameters; if :The speed of the cleaning roller is increased by %, and the power of the negative pressure fan is increased by %, triggering the translation mechanism. is the reference threshold.

[0015] Preferably, the generation logic of the fluff residual rate coefficient is:

[0016] S1. Obtain the actual grayscale value of the cloth surface at different times during the T period when the cleaning mechanism is cleaning the cloth surface fluff through the fluff residue collection module, and calibrate the actual grayscale value obtained at the pth time during the T period as , , is a positive integer;

[0017] S2. Calculate the coefficient of the residual rate of fluff. The calculation expression is:

[0018]

[0019] Where, is the average grayscale value within T time; is the number of sampling times within time T.

[0020] Preferably, the generation logic of the load fluctuation coefficient is:

[0021] S1. Obtain the actual working current of the variable speed motor at different times during the cleaning mechanism cleaning the fluff on the surface of the cloth through the load resistance acquisition module. Calibrate the actual working current obtained at the qth moment during the T time as , , is a positive integer;

[0022] S2. Calculate the load fluctuation coefficient. The calculation expression is:

[0023]

[0024] Where, is the average current value within the time T; k is the number of sampling times within the time T.

[0025] Preferably, the control module performs a formula analysis according to the formula:

[0026]

[0027] Where, 、 is the preset weight coefficient of pressure and residual density, .

[0028] Compared with the prior art, the present invention provides a rotary screen printing machine based on visual inspection, which has the following beneficial effects:

[0029] 1. A rotary screen printing machine based on visual inspection. The bristles of the cleaning roller in the cleaning mechanism cooperate with the negative pressure generating mechanism to quickly and thoroughly clean the fluff on the surface of the fabric, preventing the impact of residual fluff on the printing quality and significantly improving the clarity and color uniformity of the printed pattern. The negative pressure generating mechanism promptly collects the cleaned fluff into a collection box, effectively preventing the fluff from falling back onto the fabric, ensuring the stability of the fabric cleaning environment, reducing repeated cleaning and rework caused by fluff contamination, and improving production efficiency.

[0030] 2. A rotary screen printing machine based on visual inspection, with staggered suction tubes and bristles of different lengths, prevents fluff from adhering to the bristles, reduces the risk of clogging and wear of cleaning components due to fluff accumulation, extends the service life of the equipment, and reduces the frequency and cost of equipment maintenance.

[0031] 3. A rotary screen printing machine based on visual inspection, with the help of a lint residue collection module and a load resistance collection module, combined with comprehensive analysis and evaluation by the control module, can monitor the fabric cleaning status in real time, automatically adjust the cleaning roller speed, negative pressure fan power and translation mechanism action, and achieve precise cleaning of fabrics with different lint residue conditions, thereby enhancing the adaptability and intelligence of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of a rotary screen printing machine based on visual inspection proposed by the present invention from a first angle;

[0033] Figure 2 This is a second angle structural diagram of a rotary screen printing machine based on visual inspection proposed by the present invention;

[0034] Figure 3 This is a schematic diagram of the installation structure of a cleaning roller of a rotary screen printing machine based on visual detection proposed by the present invention;

[0035] Figure 4 This is a schematic cross-sectional view of a cleaning roller of a rotary screen printing machine based on visual detection proposed by the present invention;

[0036] Figure 5 This is a system block diagram of a rotary screen printing machine based on visual inspection proposed by the present invention.

[0037] In the figure: 1. Printing machine body; 2. Printing roller; 3. Mounting frame; 4. Cleaning roller; 41. Suction tube; 42. Brush; 5. Cavity; 6. Exhaust port; 7. Shell; 8. Negative pressure fan; 9. Connecting pipe; 10. Collection box; 11. Variable speed motor; 12. Slide rail; 13. Electric slider; 14. Fluff residue collection module; 15. Load resistance collection module; 16. Electric control box. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying 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 should not be understood as limiting the present invention.

[0040] Reference Figure 1-Figure 5 A rotary screen printing machine based on visual inspection includes a printing machine body 1. A cleaning mechanism is provided at the feed end of the top of the printing machine body 1. The cleaning mechanism includes a mounting frame 3. A cleaning roller 4 is rotatably connected to the mounting frame 3. A variable speed motor 11 is fixedly connected to one end of the mounting frame 3. The output shaft of the variable speed motor 11 is fixedly connected to the end of the cleaning roller 4. An exhaust port 6 is provided at the other end of the cleaning roller 4. The exhaust port 6 is connected to a negative pressure generating mechanism. A plurality of suction pipes 41 and bristles 42 distributed in an annular array are installed on the outer wall of the cleaning roller 4. The suction pipes 41 and the bristles 42 are staggered, and the length of the suction pipes 41 is shorter than the bristles 42. The suction pipes 41 are communicated with the cavity 5 inside the cleaning roller 4.

[0041] During use, the cloth is passed through the cleaning roller 4 and then connected to the printing roller 2 for printing. The variable speed motor 11 will drive the cleaning roller 4 to rotate through the output shaft, and the fluff on the cloth will be cleaned off by the brush 42. At the same time, the negative pressure generating mechanism will generate suction at the suction pipe 41, and the fluff will be sucked into the cavity 5 from the suction pipe 41, and then enter the negative pressure generating mechanism through the exhaust port 6 for collection, thereby effectively cleaning the fluff on the surface of the cloth and preventing the fluff from falling onto the cloth again. The design of the suction pipe 41 and the brush 42 with staggered distribution and different lengths can prevent the fluff from adhering to and accumulating on the brush 42, thereby reducing the risk of clogging and wear of the cleaning components due to fluff accumulation.

[0042] The negative pressure generating mechanism includes a housing 7 fixedly connected to the top of the mounting frame 3, a negative pressure blower 8 is installed in the housing 7, a collection box 10 is buckled on the top of the housing 7, a connecting pipe 9 is connected to the air inlet of the housing 7, and the other end of the connecting pipe 9 is rotatably connected to the exhaust port 6;

[0043] When in use, after starting the negative pressure blower 8, the suction force generated will suck the fluff from the cavity 5 into the connecting pipe 9 and then collect it into the collection box 10. The collection box 10 can be removed regularly to clean the fluff collected inside.

[0044] Furthermore, the mounting frame 3 is connected to the translation mechanism, which includes a pair of symmetrically distributed slide rails 12 fixedly connected to the top of the printing machine body 1, and an electric slider 13 is slidably connected in the slide rails 12. The mounting frame 3 is fixedly connected between the two electric sliders 13;

[0045] During use, if the system detects that the fluff at a certain position on the fabric does not meet the normal cleaning requirements, the system will start the translation mechanism, and then the electric slider 13 will drive the mounting frame 3 in the direction of fabric movement at a speed greater than the fabric movement speed to catch up with the fabric and then move back, so that the position on the fabric that does not meet the normal cleaning requirements can continue to be cleaned.

[0046] In another embodiment, a rotary screen printing machine based on visual inspection further includes:

[0047] The fluff residue collection module 14 is mounted on the mounting frame 3 and tilted toward the area below the cleaning roller 4, and is used to monitor the grayscale value of the cloth surface in real time and generate a fluff residue rate coefficient through the control module;

[0048] The load resistance acquisition module 15 is installed on the power supply circuit of the variable speed motor 11 and is used to monitor the real-time working current of the variable speed motor 11 in real time and generate the load fluctuation coefficient through the control module;

[0049] It should be noted that the lint residue acquisition module 14 can be a high-resolution industrial linear array camera (such as the Basler series, with an integrated ring LED light source to reduce fabric reflective interference) or other devices capable of real-time monitoring of the grayscale value of the fabric surface; the load resistance acquisition module 15 can be a Hall effect current sensor (such as the AllegroACS712) or other devices capable of real-time monitoring of the real-time working current of the variable speed motor 11; the control module is an embedded controller (such as the STM32 series) with an integrated data fusion algorithm. Therefore, the lint residue acquisition module 14, the load resistance acquisition module 15, and the control module are not specifically limited here and can be selected according to actual needs;

[0050] When in use, the control module conducts a comprehensive analysis of the generated fluff residue rate coefficient and load fluctuation coefficient to generate an evaluation coefficient, determines whether the fluff at the current position of the fabric meets the normal cleaning requirements, compares the evaluation coefficient with the pre-set reference threshold, and controls the working status of the cleaning mechanism, negative pressure generating mechanism and translation mechanism according to the comparison results.

[0051] Among them, the output end and input end of the fluff residue collection module 14 and the output end and input end of the load resistance collection module 15 are electrically connected to the input end and output end of the control module respectively, and the output end of the control module is electrically connected to the input end of the negative pressure fan 8, the input end of the variable speed motor 11 and the input end of the electric slider 13 respectively.

[0052] In another embodiment, the control module comprehensively analyzes the generated lint residue rate coefficient and load fluctuation coefficient to generate an evaluation coefficient, determines whether the lint at the current position of the cloth meets the normal cleaning requirements, compares the evaluation coefficient with a preset reference threshold, and controls the working states of the cleaning mechanism, the negative pressure generating mechanism, and the translation mechanism based on the comparison result. The specific execution steps are as follows:

[0053] Real-time detection: the fluff residue acquisition module 14 acquires the grayscale value of the fabric surface; the load resistance acquisition module 15 acquires the real-time working current of the variable speed motor 11;

[0054] Coefficient calculation:

[0055] Lint Residual Rate Coefficient: Quantifies the degree of accumulation of residual lint on the fabric surface, reflecting the visual cleanliness of the fabric after cleaning. Residual lint is judged by the degree of dispersion of the grayscale value on the fabric surface: residual lint causes uneven light reflection → more bright / dark patches in the collected image → increased grayscale value standard deviation → increased Gδ, Gδ≈1 → lint is evenly distributed / completely removed (grayscale changes are gentle); Gδ>1 → lint is locally concentrated and residual (grayscale changes are significant);

[0056] The generation logic of the fluff residual rate coefficient is:

[0057] S1, the fluff residue collection module 14 obtains the actual grayscale value of the cloth surface at different times within T time when the cleaning mechanism is cleaning the fluff on the cloth surface, and calibrates the actual grayscale value obtained at the pth time within T time as , , is a positive integer;

[0058] S2. Calculate the coefficient of the residual rate of fluff. The calculation expression is:

[0059]

[0060] Where, is the average grayscale value within T time; is the number of sampling times within time T.

[0061] Load Fluctuation Coefficient: This characterizes the abnormal fluctuations in the rotational resistance of the bristle roller, revealing potential failure risks of the mechanical system. It reflects torque changes through current fluctuations in the variable-speed motor 11: Fluff entangles the bristles → periodic surges in rotational resistance → current spikes → exponential growth of Iσ, where Iσ≈1 → stable load on the variable-speed motor 11 (current fluctuations <±5%); Iσ>1 → a sharp increase in mechanical resistance (fluff entangles / bearing damage).

[0062] The generation logic of the load fluctuation coefficient is:

[0063] S1, the load resistance acquisition module 15 is used to obtain the actual working current of the variable speed motor 11 at different times during the T time when the cleaning mechanism is cleaning the fluff on the surface of the cloth, and the actual working current obtained at the qth time during the T time is calibrated as , , is a positive integer;

[0064] S2. Calculate the load fluctuation coefficient. The calculation expression is:

[0065]

[0066] Where, is the average current value within the time T; k is the number of sampling times within the time T.

[0067] Evaluation coefficient: A comprehensive evaluation of the risk level indicator of the fluff cleaning effect and the equipment health status. Specifically, it integrates the dual effects of Gδ (cleaning effect) and Iσ (mechanical risk) and performs a formulaic analysis through the control module. According to the formula:

[0068]

[0069] Where, 、 is the preset weight coefficient of pressure and residual density, .

[0070] Dynamic adjustment: If :Maintain current parameters; if : The speed of the cleaning roller 4 is increased by 15%, the power of the negative pressure fan 8 is increased by 20%, and the translation mechanism is triggered. is the reference threshold.

[0071] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A rotary screen printing machine based on visual inspection, comprising a printing machine body (1), characterized in that: The feeding end of the top of the printing machine body (1) is provided with a cleaning mechanism, the cleaning mechanism comprising a mounting frame (3), a cleaning roller (4) rotatably connected inside the mounting frame (3), one end of the mounting frame (3) is fixedly connected to a variable speed motor (11), the output shaft of the variable speed motor (11) is fixedly connected to the end of the cleaning roller (4), the other end of the cleaning roller (4) is provided with an exhaust port (6), the exhaust port (6) is connected to a negative pressure generating mechanism, a plurality of groups of suction pipes (41) and bristles (42) distributed in an annular array are installed on the circumferential outer wall of the cleaning roller (4), the suction pipes (41) and the bristles (42) are staggered, and the length of the suction pipes (41) is shorter than that of the bristles (42), and the suction pipes (41) are communicated with the cavity (5) inside the cleaning roller (4); The negative pressure generating mechanism comprises a housing (7) fixedly connected to the top of the mounting frame (3), a negative pressure fan (8) is installed in the housing (7), a collection box (10) is buckled on the top of the housing (7), a connecting pipe (9) is connected to the air inlet of the housing (7), the other end of the connecting pipe (9) is rotatably connected to the exhaust port (6), the mounting frame (3) is connected to the translation mechanism, and further comprises: A lint residue collection module (14) is used to monitor the grayscale value of the cloth surface in real time and generate a lint residue rate coefficient through a control module; A load resistance acquisition module (15) is used to monitor the real-time working current of the variable speed motor (11) in real time and generate a load fluctuation coefficient through a control module; The generated fluff residue coefficient and load fluctuation coefficient are comprehensively analyzed by the control module in the electric control box (16) to generate an evaluation coefficient, which is compared with a preset reference threshold value, and the working states of the cleaning mechanism, the negative pressure generating mechanism and the translation mechanism are controlled according to the comparison result. The execution steps are as follows: The lint residue collection module (14) collects the grayscale value of the cloth surface; the load resistance collection module (15) collects the real-time working current of the variable speed motor (11); the control module calculates the lint residue rate coefficient, the load fluctuation coefficient and the evaluation coefficient; when the evaluation coefficient is less than the reference threshold, the current working parameters of the negative pressure fan (8) and the variable speed motor (11) are maintained; when the evaluation coefficient is greater than or equal to the reference threshold, the speed of the cleaning roller (4) is increased by 15%, and the power of the negative pressure fan (8) is increased by 20%, thereby triggering the translation mechanism.

2. A rotary screen printing machine based on visual inspection according to claim 1, characterized in that: The translation mechanism comprises a pair of symmetrically distributed slide rails (12) fixedly connected to the top of the printing machine body (1), an electric slider (13) is slidably connected within the slide rails (12), and the mounting frame (3) is fixedly connected between the two electric sliders (13).

3. A rotary screen printing machine based on visual inspection according to claim 1, characterized in that: The fluff residue collection module (14) is mounted on the mounting frame (3).

4. A rotary screen printing machine based on visual inspection according to claim 1, characterized in that: The load resistance acquisition module (15) is installed on the power supply circuit of the variable speed motor (11).

5. The rotary screen printing machine based on visual inspection according to claim 2, characterized in that: The output end and input end of the fluff residue collection module (14) and the output end and input end of the load resistance collection module (15) are electrically connected to the input end and output end of the control module, respectively. The output end of the control module is electrically connected to the input end of the negative pressure fan (8), the input end of the variable speed motor (11), and the input end of the electric slider (13).

6. A rotary screen printing machine based on visual inspection according to claim 1, characterized in that: The generation logic of the fluff residue rate coefficient is as follows: obtaining the actual grayscale value of the cloth surface at each moment in a specified time period during the cleaning process through the fluff residue acquisition module (14); and calculating the fluff residue rate coefficient reflecting the degree of residual fluff aggregation based on the absolute deviation between the actual grayscale value and the average grayscale value.

7. The rotary screen printing machine based on visual inspection according to claim 1, characterized in that: The generation logic of the load fluctuation coefficient is as follows: obtaining the actual working current of the variable speed motor (11) at each moment in a specified time period during the cleaning process through a load resistance acquisition module (15); and calculating the load fluctuation coefficient reflecting the nonlinear mutation of the mechanical resistance based on the degree of fluctuation between the actual current and the average current.

8. The rotary screen printing machine based on visual inspection according to claim 1, characterized in that: The control module couples the fuzz residual rate coefficient and the load fluctuation coefficient, and performs dynamic trade-off calculations based on the preset weight coefficient to generate an evaluation coefficient for the comprehensive failure risk of the evaluation system.

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