Self-adaptive adjusting device of digital printing machine

Abstract

The invention discloses a self-adaptive adjusting device of a digital printing machine, and relates to the technical field of printing machines. According to the technical scheme, the printing device is characterized by comprising an operation platform and a printing head sliding in the width direction of the operation platform, one side of the operation platform is fixedly connected with an extension platform used for conveying dark ready-made clothes, and the operation platform and the extension platform are provided with conveying channels for conveying the ready-made clothes; an adjusting part used for adjusting the flatness of the ready-made clothes, a scanning unit used for scanning the outline of the ready-made clothes and a printing head are sequentially arranged on the operation platform in the ready-made clothes conveying direction, and the whole ready-made clothes can be in a horizontal state through the adjusting part, so that the overall flatness of the ready-made clothes during printing is guaranteed; through printing and even uneven printing caused by uneven surface of the ready-made clothes are avoided, and the printing efficiency is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing machines, more particularly, it relates to an adaptive adjusting device of a digital printing machine. BACKGROUND

[0002] A digital printing machine is a large-format printer, which is a professional application equipment applied in the field of digital printing, and is used to apply ink to fabrics. It is mainly applied to garment fabric printing and dyeing. With the development of equipment, it has gradually expanded to the fields of home textiles, automotive interiors and industrial proofing.

[0003] The digital printing machine can not only print white cloth, but also print clothes. However, there are some thick parts such as seams, buttons and pockets on the surface of the clothes, which will cause the surface of the clothes to be uneven. The uneven surface will cause the pattern formed by printing to deform, thereby reducing the printing quality.

[0004] Therefore, a new scheme is needed to solve this problem. SUMMARY

[0005] In view of the deficiencies of the prior art, the purpose of the present application is to provide an adaptive adjusting device of a digital printing machine.

[0006] The above technical purpose of the present application is realized by the following technical scheme: the adaptive adjusting device of the digital printing machine comprises an operation platform and a printing head sliding along the width direction of the operation platform, one side of the operation platform is fixedly connected with an extension platform for conveying dark clothes, the operation platform is used for conveying light clothes, a conveying channel for conveying clothes is formed on the operation platform and the extension platform, and the operation platform is provided with an adjusting part for adjusting the flatness of the clothes, a scanning unit for scanning the outline of the clothes and a printing head in sequence along the conveying direction of the clothes. The adjusting part comprises an operation platform, a negative pressure distribution device and a control system, a plurality of through holes are arranged on the operation platform, a top rod abutting against the clothes is slidingly connected in the through hole, the negative pressure distribution device is arranged on the inner bottom surface of the operation platform, the negative pressure distribution device is used to selectively drive a single top rod to slide upward, the control system is electrically connected with the negative pressure control system and the scanning unit, the control system is used to control the driving action of the negative pressure distribution device on each top rod, and a main negative pressure chamber is formed in the operation platform, and the main negative pressure chamber is in communication with the negative pressure distribution device. The negative pressure distribution device comprises a distribution plate and a plurality of control valves, a plurality of airflow channels corresponding to the plurality of top rods are formed in the distribution plate, the control valve is located directly below the top rod and controls the opening and closing of the airflow channel, and the control valve is electrically connected with the control system. The operation platform comprises a bottom plate and a top plate arranged in sequence from bottom to top along the thickness direction of the operation platform, and a plurality of through hole arrays are arranged on the top plate; a containing groove is arranged on the bottom plate, and a plurality of control valves are arranged in the containing groove, and the main negative pressure chamber is surrounded by the inner wall of the containing groove and the top plate; The extension platform is sequentially provided with a sizing part and a rapid oven, the sizing part comprises a glue dispensing roller and a scraper abutting against the outer peripheral wall of the glue dispensing roller, a glue dropping pipe is arranged between the glue dispensing roller and the scraper, and a glue dispensing groove is arranged on the outer peripheral wall of the glue dispensing roller to transfer sizing liquid to the garment.

[0007] The application further provides that the outer peripheral wall of the bottom plate is provided with a vacuum valve, the vacuum valve is communicated with the main negative pressure vacuum chamber through a vacuum pipeline, the outer peripheral wall of the bottom plate is provided with a vacuum breaking valve, the inlet of the vacuum breaking valve is communicated with air, the outlet of the vacuum breaking valve is communicated with a vacuum pipeline, and a vacuum pressure sensor for detecting pressure is arranged in the main negative pressure chamber.

[0008] The application further provides that the end of the top rod away from the bottom plate is provided with a contact table, the contact table is provided in a semispherical shape, and a suction groove is formed in the middle of the top surface of the contact table and recessed inward.

[0009] The application further provides that the scanning unit is a three-dimensional contour scanning unit, a support frame one is fixedly connected to the operation platform, a linear module for sliding of the scanning unit is arranged on the bottom surface of the support frame one, and the scanning unit is used for scanning the surface contour of the garment and generating three-dimensional point cloud data.

[0010] The application further provides that the extension platform is provided with a support frame two, the glue dispensing roller and the scraper are arranged on the support frame two, a glue dropping box is arranged on the support frame two, and a plurality of glue dropping pipes are fixedly connected to the bottom surface of the glue dropping box and extend into the glue dropping box.

[0011] The application further provides that the temperature of the rapid oven is set to be between 40°C and 60°C, and a drying oven is arranged on the operation platform, and the temperature of the drying oven is set to be between 150°C and 160°C.

[0012] The application further provides a use method of the self-adaptive adjusting device of the digital printing machine. S1, keeping all the top rods in the lowest position, placing light-colored garments on the operation platform, and placing dark-colored garments on the extension platform, moving the dark-colored garments to the operation platform after passing through the sizing part and the rapid oven; S2, the garment passes through the scanning unit and obtains the three-dimensional contour of the garment through the scanning unit; S3, data processing is carried out by using the IPC, and the height that each top rod needs to reach under the condition that the surface of the garment is in a horizontal state is calculated; S4, the electromagnetic valve is controlled by the PLC to lift the top rod, and a supporting surface complementary to the three-dimensional contour of the garment is formed; S5, the garment is moved to the printing head below for printing treatment, and the garment after printing is moved to the drying box for curing of the printing; S6, after the printing curing is completed, vacuum release is carried out, the top rod falls into the through hole, and finally the garment is taken off.

[0013] In summary, the present application has the following beneficial effects: through the setting of the scanning unit, the contour of the garment can be scanned, and the positions with larger thickness such as seams, pockets and the like on the garment are presented, and then the data processing is carried out by the control system, the height that the top rod below the garment needs to rise is calculated, the top rod is controlled to rise by the electromagnetic valve, so that the partial positions of the garment are driven to displace, so as to ensure that the surface height of the garment is consistent when printing, so as to ensure the printing quality of the garment, the dark garment is placed on the extension platform, a layer of opaque white primer is coated on the surface of the garment, and rapid drying is carried out, so as to ensure the printing quality of the printing pattern on the dark garment. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic view of the present application; Figure 2 is Figure 1 is an enlarged schematic view of A in the middle; Figure 3 is a control principle diagram of the present application.

[0015] In the figure: 1, operation platform; 2, scanning unit; 3, drying box; 4, extension platform; 5, rapid drying box; 6, bottom plate; 7, distribution plate; 8, scraper; 9, glue dropping box; 10, glue dropping pipe; 11, glue dropping roller; 12, glue dropping groove; 13, conveying channel; 14, top rod; 15, contact table. DETAILED DESCRIPTION

[0016] The present application will be described in detail below in combination with the drawings and examples.

[0017] The self-adaptive adjusting device of the digital printing machine, such as Figures 1-3As shown, including operation platform 1 and along the width direction of operation platform 1 sliding printing head, using the sliding printing head to realize the printing of the overall garment, one side of operation platform 1 is provided with an extension platform 4 for conveying dark clothes, and operation platform 1 is only used for conveying light colored clothes, the surface of dark clothes needs to be covered with a layer of white primer first, and the primer is dried before printing, at this time some colorful printing can be completely presented on the garment, operation platform 1 and extension platform 4 are provided with conveying channel 13 for conveying clothes, conveying channel 13 is provided as an electric track, and the electric track on the extension platform 4 and the electric track on the operation platform 1 are communicated, so that the dark clothes on the extension platform 4 can be printed after completing the sizing process, operation platform 1 is provided with adjusting part for adjusting the flatness of clothes, scanning unit 2 for scanning the outline of clothes and printing head along the conveying direction of clothes in sequence, so that the clothes can be placed on the adjusting part, and the surface of the clothes can be located on the same horizontal plane before printing, the adjusting part is also slidingly connected on the conveying channel 13 on the extension platform 4, so that the dark clothes can keep the surface flat after completing the sizing before printing, and the printing quality is guaranteed.

[0018] The adjusting part comprises an operation platform 1, a negative pressure distribution device and a control system. The operation platform 1 comprises a bottom plate 6 and a top plate arranged in sequence from bottom to top along the thickness direction of the operation platform 1. A plurality of through holes are arrayed on the top plate. A receiving groove is arranged on the top surface of the bottom plate 6. A main negative pressure chamber is formed by the inner wall of the receiving groove and the top plate. A top rod 14 abutting against the garment is slidably connected in the through hole. The negative pressure distribution device is arranged inside the operation platform 1 and is used to selectively drive a single top rod 14 to slide upward. The negative pressure distribution device comprises a distribution plate 7 and a plurality of control valves. The distribution plate 7 is arranged between the top plate and the bottom plate 6. A plurality of airflow channels corresponding to the plurality of top rods 14 are arranged on the distribution plate 7. The control valves are arranged directly below the top rods 14 and control the channels of the airflow channels. The control system is electrically connected with the negative pressure control system and the scanning unit 2. The control system is used to control the driving action of the negative pressure distribution device on each top rod 14. The main negative pressure chamber is in communication with the negative pressure distribution device. The plurality of control valves are arranged in the receiving groove and are electrically connected with the control system. The top plate, the distribution plate 7 and the bottom plate 6 are sealed with each other by the sealing gaskets and are fastened and connected by bolts. An annular groove is formed by inwardly recessing on the outer peripheral wall of the top rod 14. A sealing ring is arranged in the annular groove. The sealing property of the top rod 14 sliding in the through hole is realized by the arrangement of the sealing ring. Since the through hole is in communication with the main negative pressure chamber, the arrangement of the sealing ring can avoid the leakage of the vacuum environment in the main negative pressure chamber through the gap between the top rod 14 and the through hole, thereby ensuring the stable use of the structure. A contact table 15 is arranged at the end of the top rod 14 away from the bottom plate 6. The contact table 15 is arranged in a semispherical shape. An adsorption groove is formed by inwardly recessing in the middle of the top surface of the contact table 15. The arrangement of the adsorption groove increases the contact area between the garment and the top rod 14. Since a small vacuum area is formed between the garment and the bottom surface of the adsorption groove, the fixing effect of the garment on the top rod 14 is increased. The slippage of the garment on the plurality of top rods 14 is avoided when the electric track drives the garment to move due to the jamming or inertia, thereby ensuring the stable fixing of the garment during the processing.

[0019] The control valve is a normally closed two-position two-way micro electromagnetic valve with a response time less than 10 ms. The control valve is fixed on the bottom surface of the distribution plate 7 by bolt connection. The upper outlet of the airflow passage formed on the distribution plate 7 is opposite to the bottom end surface of the top rod 14, and the distance between them is between 1-2 mm, thereby forming a micro drive chamber. The lower outlet of the airflow passage is connected to the inlet of the control valve through a sealed interface, and the top end of the top rod 14 is exposed to the atmosphere, so it is subjected to atmospheric pressure. The bottom surface of the top rod 14 is in the micro drive chamber. When the micro drive chamber is in a negative pressure state, there is a pressure difference between the upper and lower surfaces of the top rod 14, which is greater than the weight of the top rod 14 and the friction force of the sealing ring. At this time, it can be ensured that the top rod 14 can maintain its own height after the control valve is closed. After the overall printing process is completed, all pressures are released, and at this time the top rod 14 will return to the initial height under the action of its own gravity. A micro one-way valve is integrated in the airflow passage. Through the setting of the one-way valve, the airflow can flow from the drive chamber to the negative pressure source, but the reverse flow of the gas can be prevented. When the control valve is closed, the one-way valve can block the only potential leakage path of the drive chamber, thereby ensuring long-lasting sealing.

[0020] The outer peripheral wall of the bottom plate 6 is provided with a vacuum valve, a vacuum pump and a vacuum breaking valve. The outlet of the vacuum valve is connected to the air inlet of the vacuum pump through a hose. The inlet of the vacuum breaking valve is connected to the atmosphere. The inlet of the vacuum valve is connected to the outlet of the vacuum breaking valve through a three-way pipe joint. The other interface of the three-way pipe joint is connected to the vacuum interface of the main negative pressure chamber. The garment is laid flat on the top rods 14 at the initial height. The scanning unit 2 scans the contour of the garment and obtains the three-dimensional data of the surface of the garment. After the data is sent to the control system, the target height of each top rod 14 is calculated by the control system. The corresponding control valve in the negative pressure distribution device is opened to drive the negative pressure to act on the bottom surface of the specified top rod 14, so that the top rod 14 can slide upward in the through hole to overcome the friction between the sealing ring and the through hole and its own gravity, until the contact table 15 at the top end of the top rod 14 contacts and supports the bottom surface of the garment, forming a customized curved surface complementary to the contour of the garment. Subsequently, the control system opens the vacuum valve and starts the vacuum pump to perform vacuumizing treatment on the main negative pressure chamber. The strong pressure difference on both sides of the garment can enable the external air to quickly pass through the garment fibers and enter the main negative pressure chamber through the grid gaps formed between the top rods 14. At this time, the adsorption force generated by the airflow can stably and firmly fix the garment on the top rods 14, so that the surface of the garment is in a flat state for printing. After printing and curing are completed, the control system closes the vacuum valve and opens the vacuum breaking valve to introduce external air into the main negative pressure chamber to achieve pressure balance. At this time, the top rod 14 is reset under the action of its own gravity, and the garment can be removed.

[0021] The main negative pressure chamber is provided with a vacuum pressure sensor for detecting pressure, the scanning unit 2 is a three-dimensional profile scanning unit 2, the operating platform 1 is fixedly connected with a support frame one, the bottom surface of the support frame one is provided with a linear module for sliding of the scanning unit 2, the scanning unit 2 is used for scanning the surface profile of the garment and generating three-dimensional point cloud data, through the setting of the linear module, the scanning unit 2 can slide along the width direction of the operating platform 1, so as to ensure that the scanning path can completely cover the entire garment, the control system adopts the cooperative working mode of IPC and PLC, the IPC is used for running the man-machine interface, for monitoring and issuing instructions by the operator, and receiving three-dimensional point cloud data from the scanning unit 2, then executing the core algorithm, calculating the target height of each top rod 14, and finally sending the generated target height data to the PLC, the role of the core algorithm is to convert the data formed by the scanning unit 2 into the instruction for driving the top rod 14 to slide, the first step of the algorithm is to define a virtual ideal horizontal plane in the algorithm, which is used as the printing reference surface, the plane has a fixed height value in the coordinate system, and the three-dimensional point cloud data is processed, the IPC performs noise reduction and filtering on the data transmitted by the scanning unit 2, removes abnormal points, and obtains clean and accurate three-dimensional profile data, before calculation, the average thickness of the current garment fabric needs to be input in the software, the second step is to establish a two-dimensional coordinate system corresponding to the physical platform in the software, and accurately match the center coordinates of each top rod 14 with the two-dimensional coordinates of the point cloud data, the third step is to find all points within a certain range (for example, a circular area with a radius of 2mm centered on the coordinate) around each top rod 14 coordinate in the point cloud data, take the maximum value of the Z coordinates (height values) of these points as the target height of the top rod 14, wherein the purpose of taking the maximum value of the Z coordinates is to ensure that the top rod 14 can support the highest point of the garment, avoiding collision with the printing head, and then calculating the compensation height, by subtracting the maximum value of the Z coordinates from the fixed height value, and adding the average thickness of the garment fabric, since the top rod 14 contacts the inner surface of the garment, an additional thickness of the garment is needed to ensure that the outer surface of the garment is supported to the height of the reference plane, the last step is that the IPC combines all the target heights of the top rods 14 into a structured data packet, and sends it to the PLC through the Ethernet protocol (such as ModbusTCP), the PLC is used to receive instructions and data from the IPC, read the vacuum pressure sensor, and control the vacuum valve, the vacuum breaking valve and the vacuum pump according to the program logic, so as to control the opening of the control valve and drive the sliding of the top rod 14.

[0022] The specific working process of the control program for realizing the sliding of the top rods 14 is as follows: S1, the control program is in the default state, that is, the vacuum valve and the vacuum breaking valve are in the closed state, the vacuum pump is in standby state, the vacuum pressure sensor starts to work, and the pressure value in the main negative pressure chamber is read in real time to confirm that it is equal to the atmospheric pressure; S2, after the garment moves to the lower side of the scanning unit 2, the scanning unit 2 is started, the three-dimensional point cloud data of the garment surface is obtained, the three-dimensional point cloud data is processed by the IPC, the target height to be reached by each top rod 14 is calculated by the core algorithm, the target height data is selected by the PLC through the negative pressure distribution device, the corresponding control valve is selectively controlled to be opened, the target top rod 14 is driven to move upward under the action of the airflow channel on the distribution plate 7, and the top rod 14 is driven to move upward. After the top rod 14 is in place, the corresponding control valve is closed, and the bottom of the top rod 14 maintains a negative pressure state under the sealing action of the sealing ring, so that the current height is maintained. S3, keep the vacuum breaking valve closed to ensure that the adsorption circuit is isolated from the atmospheric environment, open the vacuum valve and start the vacuum pump, open the main vacuum passage, the vacuum pump starts to extract air from the main negative pressure chamber, the control system continuously reads the data of the vacuum pressure sensor and compares it with the preset target vacuum degree (the first preset value, such as-70kPa), when the pressure value fed back by the sensor is less than or equal to-70kPa, the control system determines that the adsorption force is sufficient, and controls the vacuum pump to stop or enter a low-power running system to enter a “pressure maintaining phase”. In the subsequent printing process, the program continuously monitors the pressure sensor. If the pressure rises to a higher threshold value (such as-65kPa) due to a small leakage, the program will automatically and temporarily restart the vacuum pump, and the pressure will be extracted to-70kPa again before stopping, so as to realize energy-saving and stable adsorption force maintenance. S4, after receiving the signal of printing and curing completion, the control system closes the vacuum valve, cuts off the connection between the main negative pressure chamber and the vacuum pump, opens the vacuum breaking valve, and introduces external air into the main negative pressure chamber. In this process, the control system continuously reads the data of the vacuum pressure sensor, and when the pressure value fed back by the sensor approaches the atmospheric pressure, the control system determines that the internal and external pressures have been fully balanced, and the adsorption force has completely disappeared. Then, the vacuum breaking valve is closed. After the internal and external pressures of the main negative pressure chamber are balanced, the negative pressure acting on the bottom of the top rod 14 for maintaining its position disappears, and all the top rods 14 slide downward along the through holes on the top plate under the action of their own gravity, and fall back to the initial lowest point, completing the reset.

[0023] The extension platform 4 is sequentially provided with a sizing part and a fast oven 5, the sizing part includes a glue dispensing roller 11 and a scraper 8 abutting against the outer peripheral wall of the glue dispensing roller 11, a glue dropping pipe 10 is arranged between the glue dispensing roller 11 and the scraper 8, a glue dispensing groove 12 for transferring sizing liquid to the garment is formed in the outer peripheral wall of the glue dispensing roller 11, the extension platform 4 is provided with a support frame two, the glue dispensing roller 11 is rotatably connected to the support frame two by a servo motor, and the same servo motor is used to drive the displacement of the conveying channel 13, the above two frequency conversion motors are controlled by the same PLC, the basic conveying speed can be set in the man-machine interface in advance, when the PLC receives the basic conveying speed set by the man-machine interface, the PLC automatically calculates the target rotating speed of the glue dispensing roller 11, and synchronously drives the two motors, so as to ensure the stable matching of the rotating speed of the glue dispensing roller 11 and the moving speed of the conveying channel 13, the two ends of the scraper 8 in the length direction are fixed on the support frame two by precision fine adjustment screws, and a digital dial indicator is installed on the support frame two for real-time reading and displaying the actual gap value between the scraper 8 and the glue dispensing roller 11, so that the operator can adjust the gap by rotating the fine adjustment screw according to the specific process requirement, the glue dropping box 9 is arranged on the support frame two, a large amount of base sizing liquid is stored in the glue dropping box 9, and a plurality of glue dropping pipes 10 are fixedly connected to the bottom surface of the glue dropping box 9 and communicate with the interiors of the glue dropping pipes 10, when dark garments are printed, most of the colored ink will be absorbed, resulting in dull and inaccurate printing color, therefore, coating white base sizing liquid on the dark garments can ensure the correct color development of colored printing on the dark garments, an air compressor is placed on the ground, the air outlet end of the air compressor is connected with a high-pressure hose, the other end of the high-pressure hose is connected with a pressure regulating valve, the pressure regulating valve is used to set and stabilize the working pressure output into the glue dropping box 9, the pressure regulating valve and an electromagnetic valve are centrally installed on a control panel, the two are connected in series through a PU gas pipe, the electromagnetic valve is used to quickly open or close the air path, so as to control the start or stop of glue dropping, the end of the electromagnetic valve away from the electromagnetic valve extends into the containing box through the PU gas pipe, a charging port and an inlet for the PU gas pipe to extend into are formed in the top surface of the glue dropping box 9, when it is needed to drop the base sizing liquid downward through the plurality of glue dropping pipes 10, the glue dropping box 9 is sealed after the white base sizing liquid is poured into the charging port and opened, the pressure of the pressure regulating valve is adjusted, and then the electromagnetic valve is powered on, the compressed air enters the glue dropping box 9 through the gas pipe and applies pressure to the liquid surface of the base sizing liquid, under the pressure of the compressed air, the base sizing liquid will flow downward and stably flow out of the glue dropping pipe 10, since the glue dropping pipe 10 is located between the scraper 8 and the glue dispensing roller 11, and the scraper 8 abuts against the glue dispensing roller 11, therefore, the base sizing liquid will accumulate between the scraper 8 and the glue dispensing roller 11, with the rotation of the glue dispensing roller 11, the scraper 8 can apply the base sizing liquid to the glue dispensing groove 12 of the glue dispensing roller 11, and with the rotation of the glue dispensing roller 11, the base sizing liquid in the glue dispensing groove 12 will be transferred to the surface of the garment.

[0024] The temperature of the fast drying oven 5 is set between 40°C and 60°C. After the base paste adheres to the garment, the garment enters the fast drying oven 5 and is briefly placed inside for 1-2 minutes. At this time, the base paste is in a state of surface dryness and internal moisture. A dry film forms on the surface of the base paste. Therefore, during the printing process, the printing ink and base paste do not stick and contaminate each other, while the interior of the base paste still contains a certain amount of liquid and is not completely cured. Thus, in the high-temperature curing stage after printing, the base paste and colored ink can chemically cross-link as a whole, thereby ensuring better adhesion and elasticity. To optimize the drying effect and handle garments of different thicknesses, a PID controller can be added to the heating system of the fast drying oven 5. The power of the heating element can be adjusted in real time according to the set temperature value to ensure that the temperature inside the oven is stable within ±2°C of the set value. Infrared thermometers (non-contact type) are installed at the inlet and outlet of the fast drying oven 5. The system measures the surface temperature of the garment and uses an online humidity sensor (to detect the humidity of the air discharged after the garment is sized). It also establishes adaptive control logic. Alternatively, a visual inspection system can be set on the conveyor channel 13 to automatically determine the color (darker colors absorb more heat) and thickness of the garment. The control system then retrieves the optimal drying time (or conveyor speed) and temperature setting for that type of garment from the pre-stored "process parameter database". Finally, the system automatically adjusts the speed of the conveyor channel 13 through the fast drying chamber 5 according to the retrieved drying time. The infrared thermometer and humidity sensor at the exit provide real-time feedback. If the surface temperature of the garment at the exit is too low or the residual humidity is too high, the system can automatically make fine adjustments (such as slightly reducing the conveyor speed or increasing the chamber temperature). The operating platform 1 is equipped with a drying chamber 3, and the temperature of the drying chamber 3 is set between 150°C and 160°C. The printed garment is sent into the drying chamber 3, and the high temperature is used to achieve the curing effect of the print, thereby completing the complete printing process of the garment.

[0025] A method for using an adaptive adjustment device for a digital printing machine, the adaptive adjustment device of which is applied to a digital printing machine, includes the following steps: S1. Keep all top rods 14 in the lowest position, place the light-colored garment on the operating platform 1, and place the dark-colored garment on the stretching platform 4. After passing through the sizing section and the fast drying oven 5, the dark-colored garment is moved to the operating platform 1. S2. The garment passes through scanning unit 2, and the three-dimensional outline of the garment is obtained through scanning unit 2; S3. Use IPC to process the data and calculate the height that each top bar 14 needs to reach to make the garment surface horizontal. S4, PLC controls the solenoid valve to lift the top rod 14, forming a support surface that complements the three-dimensional contour of the garment; S5. Move the garment to the bottom of the printing head for printing. Move the printed garment to the drying oven 3 for printing curing. S6. After the printing is cured, vacuum release is performed, and several top pillars fall into the through hole. Finally, the garment is removed.

[0026] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An adaptive adjustment device for a digital printing machine, comprising an operating platform (1) and a printing head that slides along the width direction of the operating platform (1), characterized in that: An extension platform (4) for conveying dark-colored garments is fixedly connected to one side of the operating platform (1). The operating platform (1) is used to convey light-colored garments. A conveying channel (13) for conveying garments is provided on the operating platform (1) and the extension platform (4). An adjustment part for adjusting the flatness of the garment, a scanning unit (2) for scanning the outline of the garment, and a printing head are arranged sequentially on the operating platform (1) along the conveying direction of the garment. The adjustment unit includes an operating platform (1), a negative pressure distribution device and a control system. The operating platform (1) is provided with an array of through holes. A top rod (14) that abuts against the garment is slidably connected in the through holes. The negative pressure distribution device is provided on the inner bottom surface of the operating platform (1). The negative pressure distribution device is used to selectively drive a single top rod (14) to slide upward. The control system is electrically connected to the negative pressure control system and to the scanning unit (2). The control system is used to control the driving action of the negative pressure distribution device on each top rod (14). A main negative pressure chamber is formed in the operating platform (1). The main negative pressure chamber is connected to the negative pressure distribution device. The negative pressure distribution device includes a distribution plate (7) and several control valves. The distribution plate (7) has several airflow channels that correspond one-to-one with several push rods (14). The control valves are located directly below the push rods (14) and control the opening and closing of the airflow channels. The control valves are electrically connected to the control system. The operating platform (1) includes a bottom plate (6) and a top plate arranged sequentially from bottom to top along the thickness direction of the operating platform (1), and a plurality of through holes arrayed on the top plate; a receiving groove is provided on the bottom plate (6), and a plurality of control valves are arranged in the receiving groove; the main negative pressure chamber is formed by the inner wall of the receiving groove and the top plate. The stretching platform (4) is provided with a sizing section and a fast drying oven (5) in sequence. The sizing section includes a dispensing roller (11) and a scraper (8) that abuts against its outer peripheral wall. A drip tube (10) is provided between the dispensing roller (11) and the scraper (8). A dispensing groove (12) for transferring the sizing liquid to the garment is opened on the outer peripheral wall of the dispensing roller (11).

2. The adaptive adjustment device for a digital printing machine according to claim 1, characterized in that: A vacuum valve is provided on the outer peripheral wall of the base plate (6). The vacuum valve is connected to the main negative pressure vacuum chamber through a vacuum pipe. A vacuum breaking valve is provided on the outer peripheral wall of the base plate (6). The inlet of the vacuum breaking valve is connected to air, and the outlet of the vacuum breaking valve is connected to the vacuum pipeline. A vacuum pressure sensor for detecting pressure is provided in the main negative pressure chamber.

3. The adaptive adjustment device for a digital printing machine according to claim 2, characterized in that: The top rod (14) is provided with a contact platform (15) at the end away from the bottom plate (6). The contact platform (15) is hemispherical and has an adsorption groove formed by an inward indentation in the middle of the top surface of the contact platform (15).

4. The adaptive adjustment device for a digital printing machine according to claim 3, characterized in that: The scanning unit (2) is configured as a three-dimensional contour scanning unit (2). A support frame is fixedly connected to the operating platform (1). A linear module for the scanning unit (2) to slide is provided on the bottom surface of the support frame. The scanning unit (2) is used to scan the surface contour of the garment and generate three-dimensional point cloud data.

5. The adaptive adjustment device for a digital printing machine according to claim 2, characterized in that: The extension platform (4) is provided with a support frame 2. The dispensing roller (11) and the scraper (8) are both provided on the support frame 2. The support frame 2 is provided with a dispensing box (9). Several dispensing tubes (10) are fixedly connected to the bottom surface of the dispensing box (9) and extend into the dispensing box (9).

6. The adaptive adjustment device for a digital printing machine according to claim 5, characterized in that: The temperature of the fast drying oven (5) is set between 40°C and 60°C. The operating platform (1) is equipped with a drying box (3), and the temperature of the drying box (3) is set between 150°C and 160°C.

7. A method of using an adaptive adjustment device for a digital printing machine, wherein the method is applied to the adaptive adjustment device of the digital printing machine according to any one of claims 1-6, characterized in that: S1. Keep all top rods (14) in the lowest position, place the light-colored garment on the operating platform (1), place the dark-colored garment on the stretching platform (4), and move the dark-colored garment to the operating platform (1) after passing through the sizing section and the fast drying oven (5). S2. The garment passes through the scanning unit (2) and the three-dimensional outline of the garment is obtained through the scanning unit (2); S3. Use IPC to process the data and calculate the height that each top bar (14) needs to reach to make the garment surface horizontal. S4, PLC controls the solenoid valve to raise the top rod (14) to form a support surface that complements the three-dimensional contour of the garment; S5. Move the garment to the bottom of the printing head for printing. Move the printed garment to the drying box (3) for printing curing. S6. After the printing is cured, vacuum release is performed, and several top rods (14) fall into the through hole. Finally, the garment is removed.

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