How to reduce the defect rate of pure cotton cloth digital printing machine

by:angelacrox     2021-09-13
The defect rate of digital printing machines is actually a way to increase profits. Regardless of the quality of the machine itself, what we can do is to improve the printing effect and quality of the digital printing machine for pure cotton cloth. Yanyan's editor has sorted it out and improved the printing effect and quality from the following four aspects: A. The quality of the printed pattern has been significantly reduced: Phenomenon: The image definition is not high. Phenomenon: the image is fuzzy and unclear; there are incomplete graphics in the image: the fineness of the jet nozzle is not adjusted properly. It is mainly caused by the mismatch between the inkjet resolution of the pure cotton digital cloth printing machine and the grey cloth. Solution: Due to the weaving method of the grey cloth, the surface cannot be as smooth as paper. The difficulty of increasing the software and hardware of the digital cotton printing machine should be based on the fineness of the pattern and the finish of the grey fabric. The resolution should be reasonably selected. The height of the nozzle of the digital cotton printing machine should be adjusted reasonably for fabrics of different thicknesses: 1. The nozzle is too low: easy Block the print head and affect the color of the pattern; 2. The print head is too high: the ink moves left and right with the print head of the pure cotton cloth digital printing machine. There is a certain height from the fabric. Will produce a certain angle of parabola. The borders of the printed pattern will be blurred. The accuracy is poor. The colors are not bright enough. So when printing. Adjust the nozzle of the pure cotton digital cloth printing machine to the proper height. B. The color level in the pattern is not rich enough: there are two knots in the pattern, and the level transition is unnatural; the color expression is not strong; the level is relatively smooth. The reason is that the dye ink is improperly selected or not suitable for the grey fabric. Solution: Inkjet printing of pure cotton cloth digital printing machine uses the number of sprayed droplets to change the color level. Jet printing as a stipple. There is no problem in expressing dark colors with high dot density. Sometimes there is a feeling of poor hierarchy. Or due to the mixing of extra color points, the phenomenon of gray and dark color and reduced color vividness is easy to solve the problem of light-colored areas. The effect of increasing density can be better by using dark and light color materials, and double color materials. Another method is to pre-mix the colors. The so-called 'spot color' jet printing. But it must be supported by a color measurement and matching system and an automatic mixing system. And color registration will be restricted. C. The surface particle size is relatively coarse or the ink flow occurs during the printing process: it is caused by improper adjustment or damage to the inkjet port of the pure cotton digital cloth printing machine. Solution: the choice of printing accuracy. Generally, worsted fabrics are mostly printed with high-precision 720doi~720dpi. Printing accuracy is directly related to printer resolution. Use 720dpi resolution for fabric printing. The precision is already quite high, and general woolen fabrics can be printed with 360dpi~360dpi precision. This can increase the printing speed. And enough to meet the printing accuracy. D. The phenomenon of dye ink bleeding after printing: The volume of the ink that can be absorbed by the fabric printing part is small. Under the action of the capillary effect. The excess ink on the surface of the fabric diffuses along the capillary between the fibers, causing the inkjet printing pattern of the pure cotton digital cloth printing machine to bleed. The main factor that affects the penetration of paint ink on the fabric is the composition of the ink itself. Fiber type and fabric structure and specifications are also very important factors. Solution: Treat the fabric with a suitable thickener. Block the gaps between the fibers. Prevent the ink from spreading along the capillary of the digital printing machine for pure cotton cloth. For light and loose fabrics, the gap between the fibers is large and the water holding capacity is poor. When inkjet printing.
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