A digital printing machine sizing device

Abstract

This utility model discloses a sizing device for a digital printing machine, which is installed above the printing guide belt. It includes a spraying module and a color sensor module. The spraying module is located at the feed end of the digital printing machine, and the color sensor module is located at the discharge end. The spraying module includes several spraying mechanisms arranged parallel to each other along the fabric width direction. The color sensor module includes several color sensors arranged parallel to each other along the fabric width direction. A color sensor is installed at the rear end of each spraying mechanism. Each spraying mechanism includes a spraying pipe and a solenoid valve for controlling the opening and closing of the spraying pipe. Each color sensor and its corresponding solenoid valve are communicatively connected to a controller. The spraying module or color sensor module is movable back and forth above the printing guide belt along the fabric conveying direction. It does not rely on a computer for operation and has the advantages of simple structure, low modification cost, saving sizing material, and improving product quality.

Description

Technical Field

[0001] This utility model relates to the field of printing and dyeing machinery and equipment, and in particular to a sizing device for a digital printing machine. Background Technology

[0002] Digital printing machines, as the latest textile printing method, are gradually replacing traditional printing methods due to their unique flexibility, environmental friendliness, and reduced raw material costs, and are destined to become the mainstream of textile printing. Currently, reactive digital printing technology involves online sizing: a rotary screen is first used to apply sizing (printing auxiliaries) to the entire surface of the textile using a digital printhead, and then colored ink is sprayed onto the textile surface according to the pattern, thus achieving textile printing. The main drawbacks of this online sizing process are: 1. Many blank areas of the pattern that do not require sizing are sized simultaneously, resulting in sizing waste and increasing the burden on wastewater treatment; 2. Although sizing can be removed from blank areas that do not require sizing by washing, the original cleanliness cannot be fully restored, causing color deviations. Therefore, there is an urgent need to improve the existing reactive digital printing technology to reduce production costs. Utility Model Content

[0003] The purpose of this utility model is to provide a sizing device for a digital printing machine.

[0004] The technical solution to achieve the purpose of this utility model is: a sizing device for a digital printing machine, which is installed above the printing guide belt. It includes a spraying module and a color sensor module arranged sequentially from front to back along the fabric conveying direction. The spraying module is located on the feed end side of the digital printing machine, and the color sensor module is located on the discharge end side of the digital printing machine. The spraying module includes several spraying mechanisms arranged parallel and spaced along the fabric width direction. The color sensor module includes several color sensors arranged parallel and spaced along the fabric width direction. A color sensor is installed at the rear end of each spraying mechanism. Each spraying mechanism includes a spraying pipe and a solenoid valve for controlling the opening and closing of the spraying pipe. Each color sensor and the corresponding solenoid valve are communicatively connected to a controller. The spraying module or the color sensor module is movably installed above the printing guide belt along the fabric conveying direction.

[0005] Furthermore, the upper end of the spray pipe is provided with an air inlet, the bottom of the spray pipe is provided with a nozzle, the side of the spray pipe is provided with a liquid inlet, the air inlet is connected to the air supply system pipeline, the liquid inlet is connected to the grout supply system pipeline, and the solenoid valve is installed on the air inlet path.

[0006] Furthermore, the color sensor module or the spraying module is mounted on a linear drive mechanism.

[0007] As is well known, most of the intelligent image raster processing (RIP) and color management systems commonly used in digital printing machines are developed by foreign companies. These software programs have high performance and stability in color management and image conversion, and occupy a large market share. Developing sizing software similar to that used in digital printing machines is costly. However, the sizing device for digital printing machines implemented in this invention uses an electromagnetic valve to control the ink spraying operation of the spray pipe. The spraying mechanism and sensors work in a one-to-one correspondence. Utilizing the periodic pattern of the printed design, and through pattern recognition after printing, the installation position of the sizing device is adjusted to match the inkjet node and sizing node of the digital printing machine, achieving localized sizing before printing. It does not rely on a computer, has the advantages of simple structure, low modification cost, ink saving, and improved product quality, solves common pain points in the industry, and is suitable for widespread adoption within the industry. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the main structure of the sizing device for a digital printing machine according to an embodiment of the present invention; wherein, the arrows represent the fabric conveying direction; Figure 2 This is a schematic diagram of the spraying mechanism of the digital printing machine according to an embodiment of the present invention; wherein, the solid arrow represents the air intake direction; Figure 3 This is a schematic diagram of the linear drive mechanism described in an embodiment of the present invention; Figure 4 for Figure 3 A schematic diagram of the right-side structure. Detailed Implementation

[0009] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0010] like Figures 1 to 4 As shown, a sizing device for a digital printing machine is installed above the printing guide belt 10. It includes a spraying module 1 and a color sensor module 2 arranged sequentially from front to back along the fabric conveying direction. The spraying module 1 is located at the feed end 201 of the digital printing machine 20, and the color sensor module 2 is located at the discharge end 202 of the digital printing machine 20. The spraying module 1 includes several spraying mechanisms 11 arranged parallel and spaced along the fabric width direction, and the color sensor module 2 includes several color sensors 21 arranged parallel and spaced along the fabric width direction. Each color sensor is movably installed above the printing guide belt along the fabric conveying direction, and a color sensor 21 is installed at the rear end of each spraying mechanism 11. Each spraying mechanism 11 includes a spraying pipe 111 and a solenoid valve 112 that controls the opening and closing of the spraying pipe 111. Each color sensor 21 and the corresponding solenoid valve 112 are communicatively connected to a controller (not shown).

[0011] Furthermore, the spray pipe 111 is arranged perpendicular to the printing guide belt 10. The upper end of the spray pipe 111 is provided with an air inlet 1111, the bottom of the spray pipe 111 is provided with a nozzle 1112, and the side of the spray pipe 111 is provided with a liquid inlet 1113. The air inlet 1111 is connected to the air supply system (not shown) pipeline, the liquid inlet 1113 is connected to the paste supply system (not shown) pipeline, and the solenoid valve 112 is installed on the air inlet path.

[0012] Furthermore, a linear drive mechanism is installed at each end of the color sensor module 2. Each linear drive mechanism 3 includes a lead screw 31 and a servo motor 32. Each color sensor 21 is mounted between two lead screws 31. The axial direction of the lead screw 31 is in the same direction as the fabric conveying direction. The lead screw 31 is connected to the servo motor 32 for transmission.

[0013] During operation, as the fabric on the printing guide belt exits the digital printing machine and passes the color sensor, if the color sensor detects color on the fabric below, the controller issues a command, the corresponding solenoid valve opens, and the air supply system supplies air to the corresponding spray pipe. The ink in the corresponding spray pipe is then sprayed onto the fabric surface on the printing guide belt through the nozzle. The air flow rate can be automatically adjusted according to the printing speed.

[0014] When there is a deviation in the fabric running direction at the spraying position, the movement of the entire row of sensors can be adjusted to ensure that the color ink covers the paste in the correct position, thus achieving the purpose of saving paste and protecting the environment.

[0015] The structure of the shotcrete pipe mechanism described in this utility model is not limited to that shown in the embodiment. It can also be an existing shotcrete device with higher precision, but it will increase the production cost. The precision of the shotcrete pipe mechanism described in the embodiment can already meet the production needs.

[0016] This invention is not limited to the fact that each of the color sensors can be movable, or the color sensors can be stationary and each of the spraying mechanisms can be installed above the printing guide belt in a way that allows for back-and-forth movement along the fabric conveying direction, as long as the distance between the sizing device and the digital printing machine can be adjusted.

[0017] The linear drive mechanism structure is not limited to the lead screw transmission structure, but can also be other conventional linear motion mechanisms in the mechanical field, which will not be elaborated here.

[0018] The controller for controlling the solenoid valve is a conventional technical means in the electrical field and will not be described in detail here.

[0019] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent process transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sizing device for a digital printing machine, characterized in that: It is installed above the printing guide belt and includes a spraying module and a color sensor module arranged sequentially from front to back along the fabric conveying direction. The spraying module is located on the feed end side of the digital printing machine, and the color sensor module is located on the discharge end side of the digital printing machine. The spraying module includes several spraying mechanisms arranged parallel and spaced along the fabric width direction, and the color sensor module includes several color sensors arranged parallel and spaced along the fabric width direction. A color sensor is installed at the rear end of each spraying mechanism. Each spraying mechanism includes a spraying pipe and a solenoid valve for controlling the opening and closing of the spraying pipe. Each color sensor and the corresponding solenoid valve are communicatively connected to the controller. The spraying module or the color sensor module is movably installed above the printing guide belt along the fabric conveying direction.

2. The on-line sizing device for digital printing machine according to claim 1, characterized in that: The upper end of the spray pipe is provided with an air inlet, the bottom of the spray pipe is provided with a nozzle, and the side of the spray pipe is provided with a liquid inlet. The air inlet is connected to the air supply system pipeline, the liquid inlet is connected to the grout supply system pipeline, and the solenoid valve is installed on the air inlet path.

3. The on-line sizing device for digital printing machine according to claim 1, characterized in that: The color sensor module or the spraying module is mounted on a linear drive mechanism.

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