The working principle of screen printing machine.
The full name of the Screen printing Machine is "screen Printer" (Screen Printer Machine), which is a device that leaks the screen printing ink to the printed surface according to the shape of the screen opening. It can be divided into vertical screen printing machine, inclined arm screen printing machine, rotary screen printing machine, four-column screen printing machine and automatic screen printing machine. Mainly used in the electronic processing industry, printed circuit board screen logo, instrument shell panel logo, circuit board processing process solder paste printing. Screen printing is the silk fabric, synthetic fiber fabric or metal wire mesh stretched on the screen frame, using hand-carved paint film or photochemical plate making method to produce screen printing plates. Modern screen printing technology is to use sensitive materials to make screen plates by photographic plate making (so that the screen holes on the graphic part of the screen plate are through holes, rather than the screen holes on the graphic part are blocked). When printing, the extrusion of the scraper makes the ink transfer to the substrate through the mesh of the graphic part, forming the same graphic as the original manuscript. Screen printing equipment is simple, easy to operate, simple printing, plate making and low cost, strong adaptability. Screen printing has a wide range of common prints: color oil paintings, posters, business cards, bound covers, commodity signs and printing and dyeing textiles.
Pad printing machine working principle
First, the design pattern is etched on the printing plate, the etching plate is coated with ink, and then most of the ink is transferred to the printed object through the silicone head.
A. The ink is evenly covered on the steel plate by the brush. B. Remove excess ink with a steel scraper. C. From the printing head down to the steel plate to pick up the ink in the pattern. D. From the printing head shift down to the product to cover the pattern.
The printing area of pad printing has a certain limit, at present, the largest printing surface in China can be 150*450MM, but not full-plate printing, but intermittent character class, full-plate printing, the current maximum diameter of 300MM, but the following consumables cost (glue head) will be very high printing area is basically unlimited, Flat class full plate printing can reach 1500*2000MM, the cost of consumables (screen) is low, and can be reused.
The shape of the product printed by the pad printing machine has no restrictions on the shape, plane, curved surface, wavy surface, as long as it is the place where the rubber head deformation can be reached, the printing surface of the product can be printed flat, plain or regular curved surface, printing quality is high precision positioning, high-definition printing pattern.
Pad printing machine features pad printing ink layer is thin, can be printed on any surface color, showing very good color expression and printing adaptability, commonly known as universal printing, in addition to water and air can not be printed, any object can be used pad printing screen printing ink layer thick, printed pattern three-dimensional, hand can touch the concave and convex, suitable for high-end product surface printing, Color performance is very good, multi-color overprinting is more troublesome, the surface requirements of the product is a regular plane or surface, there are certain limitations in the printing range.
