Commonly used printing methods and equipment

One, roll printing
Roller printing has been the most popular fabric printing method in China since the 50s to 80s of the 20th century. Its speed is high and its output is large. It is particularly suitable for mass production during the planned economy period. However, this production method is relatively backward, the operator is labor-intensive, the number of traps is limited (up to 8 colors), the flower cylinder carving process is complicated, and the polluting problem caused by the chrome plating of the flower cylinder is also a problem. In addition, this printing method has a long production preparation cycle (drum engraving takes a long time), and does not meet the requirements of small batches, multiple varieties, and fast delivery. With the introduction and popularization of rotary screen printing machines, roller printing has gradually been eliminated.
Second, rotary screen printing
Cylindrical screen printing method is referred to as rotary screen printing method. It combines the high efficiency of roller printing and the advantages of low-volume and multi-type printing of flat screen printing. It is currently the most used printing method. Rotary screen printing machine can use stainless steel scraper or magnetic rod as squeegee respectively. The rotary screen printing machine (Figure 6-2) and MBK magnetic stick type printing machine (domestic round) produced by STORK company are used more frequently. The net printer is modeled on the STORK model). Rotary screen printing machine can be divided into 8 sets of color number, 10 sets, 12 sets, 16 sets and 20 sets of colors; the circumference of the round net is the most common 640mm, there are large flowers back, there are 914mm, 1018mm, 1826mm, etc. Size; printed width 1280mm, 1620mm, 1850mm, 2400mm, 2800mm and other dimensions. The most common or most common application is the rotary screen printing machine with a circumference of 640 mm and a printing width of 1620 mm. The special width printing is generally used for the printing of beddings and special decorative fabrics. smaller.
During the production of the printing machine, the color paste in the rotary screen is printed on the surface of the fabric through a screen under the appropriate pressure with a scraper or a magnetic bar, and the fabric after leaving the rotary screen and the conduction belt enters the drying room and is dried with hot air. , And then steaming or baking, washing and other processes to complete the printing process. Rotary screen printing machine can be continuously produced, the production speed is generally 40~60m/min, the production efficiency is high, and the operator's labor intensity is low. The disadvantage is that the printing fineness of the pattern is not as good as the roller printing, and the color yield and the level richness are not as good as Flat screen printing.

Third, flat screen printing
Flat screen printing equipment is mainly divided into two categories, namely, net-driven flat screen printing and flat screen printing.
1. Web-based early network printing
Commonly used in the printing and dyeing plant is the manual platen printing (commonly known as platen printing). The length of the platen is generally tens of meters to nearly 100 meters. The fabric to be printed is first attached to a fixed hot platen. During printing, the screen is manually moved. When the screen moves to a specified position, it is positioned with a regular hole. Both hands completed the squeegee action with a scraper on the screen and then removed the screen, completing the printing of the individual colors in order. The printed fabric is dried on a hot platen and then manually removed, and steam-fixed using a special cage steamer. The whole process of this manual printing method is based on the manual operation of the operators. It has high labor intensity and low production efficiency. It has been eliminated by large-scale printing and dyeing plants, but there are certain traditional markets and advantages for printing such as headscarves, scarves and handkerchiefs. .
2. Placement flat screen printing machine
Most of the current flat screen printing machines refer to fully automated flat screen printing. When printing, the fabric is pasted on the rubber belt with a patch glue. As the rubber belt is moved forward intermittently into the cloth, multiple flat screens (in accordance with the number of colors) are automatically lifted and the automatic squeegee is used to complete the multi-color printing on the fabric. Printing and printing fabrics also enter the drying room with hot air as in the rotary screen printing.

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