A digital printing oven capable of preventing color mixing

Abstract

The utility model discloses a kind of anti-bleeding digital printing oven, including cloth feeder, oven and cloth drop rack, cloth feeder and cloth drop rack are located at the front side and rear side of oven respectively, servo stripping roller is equipped on cloth drop rack, servo motor is provided on the side of cloth drop rack, the height of the uppermost end of servo stripping roller is consistent with the height of the discharge port of external digital printing machine, three front guide rollers are provided on cloth feeder, two rear guide rollers are further equipped on cloth drop rack, the utility model is reasonable in structure, fabric after digital printing, it will enter into oven from cloth feeder, front side upwards, preliminary drying after oven, contact with servo stripping roller again, servo stripping roller is the first object contacted by fabric, can effectively prevent printing on fabric from being damaged, and its driving fabric transmission rate is kept synchronous with the rate that digital printing machine exports fabric, so that fabric always keeps horizontal state when preliminary drying, prevent printing from being blurred due to shaking.

Description

Technical Field

[0001] This utility model relates to the field of digital printing technology, and in particular to a digital printing oven that prevents color mixing. Background Technology

[0002] The process of creating patterns on fabrics using dyes or pigments is called fabric printing. Printing processes can create different colored patterns on fabrics, meeting the diverse needs of various consumer groups. Among various printing technologies, digital printing is a relatively advanced process. Digital printing equipment can directly print the desired patterns onto the fabric surface, offering a wide color gamut, clear and detailed images, and reducing the use of chemical reagents and environmental pollution.

[0003] Digitally printed fabrics are susceptible to damage from external factors while still wet. For example, in existing processes, some thin fabrics may experience print dispersion, blurring, or color bleeding due to vibrations in the guide rollers or conveyor belts as they are transported to the drying oven, or due to inconsistencies in output speed with the preceding digital printing machine. Ensuring the printed fabric maintains its quality in subsequent processes is a current research focus. To address these issues, a solution is proposed below. Utility Model Content

[0004] The purpose of this invention is to provide a digital printing oven that prevents color bleeding, which has the advantage of performing preliminary drying first to prevent color bleeding.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A digital printing oven for preventing color bleeding includes a fabric infeed frame, an oven, and a fabric drop frame. The fabric infeed frame and the fabric drop frame are located on the front and rear sides of the oven, respectively. A servo fabric stripping roller is provided on the fabric drop frame, and a servo motor is provided on one side of the fabric drop frame. The output shaft of the servo motor is connected to one end of the servo fabric stripping roller. The height of the uppermost end of the servo fabric stripping roller is the same as the height of the external digital printing machine's outlet. Three front guide rollers are provided on the fabric infeed frame, and the three front guide rollers are positioned at different heights on the fabric infeed frame. Two rear guide rollers are also provided on the fabric drop frame, and the two rear guide rollers are used to change the direction of fabric travel.

[0006] Preferably, the fabric feeding frame is provided with a coarse guide roller, which is located obliquely below the servo stripping roller.

[0007] Preferably, the three guide rollers are, from top to bottom, guide roller one, guide roller two, and guide roller three, with guide roller two located at the frontmost side.

[0008] Preferably, the specifications of the two rear guide rollers are the same as those of the three front guide rollers. The two rear guide rollers are rear guide roller one and rear guide roller two from top to bottom. The height of rear guide roller two is the same as the height of front guide roller three, and the height of rear guide roller one is higher than the height of front guide roller one.

[0009] Preferably, the fabric drop frame is provided with a tensioning mechanism, which includes a slider, a cylinder and an adjusting roller. A vertical slide is provided on the rear mounting plate. The slider is located in the slide and slides with the slide. The two ends of the adjusting roller are rotatably connected to the two sliders respectively. The cylinder is fixed on the outside of the rear mounting plate and the output shaft of the cylinder is connected to the slider.

[0010] The beneficial effects of this utility model are as follows: 1. The servo motor controls the conveying speed of the servo fabric peeling roller to the fabric, which is consistent with the speed at which the digital printing machine completes the printing and conveys the fabric. The height of the top of the servo fabric peeling roller is consistent with the output height of the digital printing machine, so that the printed fabric always remains horizontal and straight without shaking, and the print on the fabric will not be scattered or blurry. 2. The servo stripping roller is located at the fabric drop frame. It is the first object that the printed fabric comes into contact with. Therefore, the fabric will not come into contact with any object before it is initially dried, preventing the print on the fabric from being worn away by other objects. 3. After printing, the fabric will be repeatedly put into the drying oven, which can reduce the required length of the drying oven and reduce the floor space occupied by the drying oven. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 This is a schematic diagram illustrating the structure of the fabric feeding frame, used as an example. Figure 3 This is a schematic diagram illustrating a portion of the oven's structure in an embodiment. Figure 4 This is a schematic diagram illustrating the structure of the fabric dropper frame in an embodiment. Figure 5 This is a schematic diagram illustrating the structure of the fabric placement mechanism on the fabric dropper, used as an example.

[0012] Attached reference numerals: 1. Fabric feeder; 2. Drying oven; 3. Fabric discharge rack; 4. Servo stripping roller; 5. Coarse guide roller; 6. Front guide roller one; 7. Front guide roller two; 8. Front guide roller three; 9. Rear guide roller one; 10. Rear guide roller two; 11. Slide rail; 12. Cylinder; 13. Adjusting roller; 14. Upper conveyor belt; 15. Middle conveyor belt; 16. Lower conveyor belt; 17. Fabric. Detailed Implementation

[0013] The following description is merely a preferred embodiment of this utility model, and the scope of protection is not limited to this embodiment. All technical solutions falling within the scope of this utility model's concept should be protected. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom" and "top," "inner" and "outer" refer to directions toward or away from the geometric center of a specific component.

[0014] like Figures 1 to 5 As shown, a digital printing oven for preventing color transfer mainly includes a fabric feed rack 1, an oven 2, and a fabric unloading rack 3. The fabric feed rack 1 and the fabric unloading rack 3 are fixedly installed on the front and rear sides of the oven 2, respectively. The oven 2 is equipped with a heating and ventilation system for drying and fixing the fabric 17.

[0015] A servo fabric peeling roller 4 is installed on the fabric feeding frame 3, with a servo motor (not shown in the figure) on one side. The output shaft of the servo motor is connected to the end of the servo fabric peeling roller 4 via a coupling, thereby driving its rotation. The tangent height of the uppermost part of the servo fabric peeling roller 4 is consistent with the height of the outlet of the external digital printing machine. The external digital printing machine is located in front of the fabric feeding frame 1. This design ensures that the fabric 17, which is still wet after digital printing, can smoothly transition horizontally from the printing machine outlet to the servo fabric peeling roller 4 inside the drying oven 2.

[0016] Furthermore, the conveying speed of the servo stripping roller 4 to the fabric 17 is synchronized with the speed at which the digital printing machine transmits the fabric 17, ensuring that the fabric 17 does not droop after printing, fundamentally avoiding the shaking of the fabric 17 caused by height difference and preventing blurry printing.

[0017] In addition to the servo stripping roller 4, a coarse guide roller 5 is also provided on the fabric dropper 3. The coarse guide roller 5 is located diagonally below the servo stripping roller 4, and its function is to receive the fabric 17 coming down from the servo stripping roller 4 and adjust its height position.

[0018] In the overall system of the fabric feeder 1, drying oven 2, and fabric unloading rack 3 of this application, there are also three conveyor belts: upper, middle, and lower. These three conveyor belts do not play any role in the drying and conveying process of the fabric 17 in this application. However, they can provide the overall system with an additional method for conveying the fabric 17.

[0019] The height of the uppermost side of the servo stripping roller 4 is higher than the height of the upper surface of the upper conveyor belt 14. After the height is adjusted by the coarse guide roller 5, the fabric 17 that re-enters the drying oven 2 will pass between the lower end face of the upper conveyor belt 14 and the upper end face of the middle conveyor belt 15 without contacting either of them.

[0020] Three guide rollers at different heights are installed on the fabric feed frame 1. From top to bottom, they are designated as guide roller 1 (6), guide roller 2 (7), and guide roller 3 (8), with guide roller 2 (7) being the most forward in the horizontal position. These three guide rollers work together to guide and change the direction and height of the fabric 17 within the drying oven 2. This causes the fabric 17 to turn again, passing between the lower end face of the middle conveyor belt 15 and the upper end face of the lower conveyor belt 16 without contacting either of them.

[0021] The fabric dropper 3 is also equipped with two rear guide rollers, whose specifications are the same as those of the aforementioned front guide roller 6. These two rear guide rollers are defined as rear guide roller 9 and rear guide roller 10 from top to bottom. The installation height of rear guide roller 10 is consistent with the height of front guide roller 8, while the height of rear guide roller 9 is significantly higher than that of front guide roller 6. The main function of these rear guide rollers is to change the direction of travel of the fabric 17 again.

[0022] In addition, a tensioning mechanism is integrated on the fabric dropper 3. This mechanism includes a slider, a cylinder 12, and an adjusting roller 13. A vertical slide rail 11 is machined on the rear mounting plate of the fabric dropper 3. The slider is embedded in the slide rail 11 and can slide up and down along it. The two ends of the adjusting roller 13 are rotatably connected to the left and right sliders respectively through bearings.

[0023] Cylinder 12 is fixedly mounted on the outside of the rear mounting plate, and its output shaft is connected to the slider. By controlling the extension and retraction of cylinder 12, the slider and adjusting roller 13 can be driven to move up and down together, thereby precisely adjusting the tension of fabric 17 during transmission, ensuring that fabric 17 always remains flat and will not wrinkle due to looseness or deform due to excessive tightness. Cylinder 12 here can also be replaced with other devices that can provide linear power, such as electric actuators.

[0024] The fabric 17 of this invention operates as follows: The digitally printed fabric 17 is first fed horizontally from the outlet of the digital printing machine and enters the drying oven 2 from front to back, directly resting on the servo peeling roller 4. Driven by a servo motor, the servo peeling roller 4 pulls the fabric 17 at a speed completely synchronized with the fabric output of the digital printing machine, ensuring that the fabric 17 has no tension changes and no shaking during the critical initial drying stage.

[0025] Next, the fabric 17 descends from the servo stripping roller 4, passes the coarse guide roller 5 diagonally below it, changes direction to back to front, and enters the drying oven 2 for the second time. Inside the drying oven 2, the fabric 17 passes in sequence around the first front guide roller 6, the second front guide roller 7, and the third front guide roller 8, forming an arrow-shaped path, thereby changing its height and direction.

[0026] Subsequently, the fabric 17 is drawn out from the feed rack 1, turns again, and enters the drying oven 2 for the third time from front to back. It passes sequentially through the rear guide roller 2 10 and the rear guide roller 1 9, and finally through the adjusting roller 13 of the tensioning mechanism. The fabric 17, after drying, is folded or rolled flat into the external storage device by the fabric arrangement mechanism on the unloading rack 3. The fabric arrangement mechanism and the storage device are existing designs and will not be described in detail.

[0027] Through this unique path design that involves three passes through the drying oven 2, the effective drying journey of the fabric 17 is greatly extended within the limited length of the equipment, improving drying efficiency. At the same time, the stable transmission of the printed fabric 17 in the wet stage is ensured by servo synchronization and tension control throughout the process, effectively preventing quality problems such as color mixing and blurry printing.

[0028] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A digital printing oven for preventing color bleeding, comprising a fabric feeding rack (1), an oven (2), and a fabric unloading rack (3), characterized in that, The fabric feeder (1) and fabric dropper (3) are located on the front and rear sides of the oven (2), respectively. The fabric dropper (3) is equipped with a servo stripping roller (4). A servo motor is provided on one side of the fabric dropper (3). The output shaft of the servo motor is connected to one end of the servo stripping roller (4). The height of the uppermost part of the servo stripping roller (4) is consistent with the height of the external digital printing machine outlet. The fabric feeder (1) is equipped with three front guide rollers. The three front guide rollers are at different heights on the fabric feeder (1). The fabric dropper (3) is also equipped with two rear guide rollers. The two rear guide rollers are used to change the direction of travel of the fabric (17).

2. The digital printing oven for preventing color bleeding according to claim 1, characterized in that, The fabric dropper (3) is provided with a coarse guide roller (5), which is located diagonally below the servo stripping roller (4).

3. The anti-color-blend digital printing oven according to claim 1, characterized in that, The three guide rollers are, from top to bottom, guide roller one (6), guide roller two (7) and guide roller three (8), with guide roller two (7) located at the frontmost side.

4. The anti-color-blend digital printing oven according to claim 2, characterized in that, The specifications of the two rear guide rollers are the same as those of the three front guide rollers. The two rear guide rollers are rear guide roller one (9) and rear guide roller two (10) from top to bottom. The height of the rear guide roller two (10) is the same as the height of the front guide roller three (8). The height of the rear guide roller one (9) is higher than the height of the front guide roller one (6).

5. The anti-color-smearing digital printing oven according to claim 1, characterized in that, The fabric drop frame (3) is provided with a tensioning mechanism, which includes a slider, a cylinder (12) and an adjusting roller (13). The fabric drop frame (3) has a vertical slide (11). The slider is located in the slide (11) and slides with the slide (11). The two ends of the adjusting roller (13) are rotatably connected to the two sliders respectively. The cylinder (12) is fixed on the outside of the fabric drop frame (3), and the output shaft of the cylinder (12) is connected to the slider.

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