Printing machine
Printing is a finishing process that uses special equipment to use one or more dyes or pigments of different colors and adopts various methods and processes to print the required patterns and patterns on fabrics. Printing machinery is ancillary equipment provided to adapt to the printing finishing process and produce printing products.
There are many methods for printing fabrics, and there are many types of printing equipment. There are two commercially important printing methods: screen printing and roller printing. However, in the past ten years, screen printing, especially rotary screen printing, has greatly replaced traditional roller printing. One of the important reasons is that more and more screen printing equipment are equipped with advanced operating instruments. With the help of digitally controlled electromechanical systems, the positioning accuracy of the screen has been greatly improved. At the same time, screen production technology has made further progress, allowing the new screen printing machine to print fine patterns that only roller printing machines were capable of in the past. Modeled. Other printing methods include: heat transfer printing, pattern printing, wax valerian (i.e. wax-proof) printing, yarn tie-dye printing and resist-dye printing, etc. In addition, digital jet printing technology, as a representative of advanced technology in the field of fabric finishing in the 21st century, has attracted widespread attention in the fabric printing and dyeing industry.
Digital jet printing is to spray small droplets of dye onto the fabric accurately according to the designed pattern and pattern requirements. The nozzles used to spray the dye liquor and the pattern formation can be controlled by computers, and complex patterns and precise pattern cycles can be obtained. Digital jet printing eliminates the delay and cost increase caused by engraving rollers and making screens. It is sensitive and fast, and can quickly switch from one pattern to another. It has a competitive advantage in the fast-changing fabric market. Moreover, the fabric is not under tension during printing (that is, the pattern will not be distorted due to stretching), and the surface of the fabric will not be crushed, thus eliminating potential problems such as fabric fuzzing or nap. However, this process has slow printing speed, expensive printing ink and high cost. It cannot print fine patterns and the outline of the pattern is blurred. Digital jet printing is a systematic project. Its success is not only related to the printing equipment, but also depends on the development of operating software and color ink.
This chapter will introduce traditional roller, flat screen and rotary screen printing machines in detail.
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