The Open Type Rotary Screen Printing Machine is a method of printing using a seamless cylindrical screen. It began in the 1960s and developed rapidly, becoming a new printing method for fabrics. The rotary screen printing machine is characterized by the continuous rotation of the rotary screen for printing, which not only maintains the style of screen printing, but also improves the printing production efficiency.
The key component of the rotary Flat Screen Printing Machine is a seamless nickel rotary screen, referred to as a nickel mesh, which is usually made by electroforming, and the mesh is hexagonal. The nickel mesh used for fabric printing generally has a circumference of 640 mm and a mesh number of 60 to 185. Printed lines or fine patterns require a higher number of meshes to ensure a neat and clear outline. In addition, a synthetic round web can be used, and the interior is lined with a metal frame net support, which can improve the printing effect of the fine pattern. The printed pattern of the nickel mesh is made by a photosensitive method.
The nickel mesh is first cleaned, and the photosensitive adhesive layer is evenly coated by the glue applicator. After drying in the dark room, the film is exposed on the exposure machine with the prepared film base, and then the adhesive layer of the unphotosensitive portion is washed to form a mesh pattern. Then, the adhesive layer is thermally cured to have a certain abrasion resistance. When printing, the color paste is fed from the scraper tube inside the nickel mesh through an automatic pulper, and is adjusted by the liquid level controller to keep the amount of color paste constant during the printing process.
The scraper is made of a flexible stainless steel sheet that adjusts the height and front and back position to control the amount of squeegee and the degree of print. The rotary screen printing machine is mainly composed of a seamless annular rubber blanket, a rotary screen frame and a liner roller. During printing, the liner roller lifts up the rubber blanket to maintain a gap between the rubber blanket and the cylinder that is comparable to the thickness of the fabric. The fabric enters from the feeding device and is attached to the rubber blanket to run synchronously with the cylinder. The flower adjustment device on the rotary frame can adjust the relative position of each rotary net to meet the flower requirements. The rotary screen printing machine can generally print 6 to 20 colors. In addition to the horizontal arrangement, there are also vertical, radial and double-sided printing patterns.