Screen printing and screen printing machine
Screen printing, also known as universal printing, originated in China and has a history of more than two thousand years. It is known as the four printing technologies together with flat printing, embossing and gravure printing.Silkscreen printing material selection is very extensive, it can be printed on many materials, such as the textile, solar wafers, plastic, liquid crystal glass, all kinds of screen printing materials such as metals, ceramics, in the advertising industry, the publishing industry, construction industry, art industry, liquid crystal industry, electronic industry, dyeing, and other fields has a very wide application.In short, screen printing can accomplish the printing task of any object regardless of its thickness, size, material, plane or surface.
Screen printing has the following characteristics:
(1) Scraper pressure is small, the substrate is more selective
Scraper pressure is the printing pressure, which acts on the substrate through the screen.Screen materials can be divided into many types, but the common denominator is that the screen is flexible and soft.Therefore, whether it is screen printing on softer materials such as films, plastics and textiles, or printing on harder materials such as liquid crystal glass and solar silicon wafers, it can maintain a high quality of printing.
(2) It can print substrate of various sizes or shapes
When the size of the substrate is not the same, the designer can design different size of the table and the size of the screen to meet the size of the substrate is different, small format of the circuit board to large textile printing can be.Because screen can be printed on the plane, can also be printed on the surface, or even on the surface of a sphere or concave and convex surface printing, screen printing for a wide range of substrate selection, from flat liquid crystal glass to curved plastic printing can be.(3) Wide use of ink types
Screen printing is to apply a certain pressure on the screen through a scraper, the screen on the ink through the screen mesh space extrusion to the substrate, screen printing is the principle of omission.Therefore, as long as it is able to screen through the interspace materials can be used as screen printing ink, such as water or oily liquids (paint, paste adhesives, etc.), or solid powder.It is important to select the appropriate ink according to the material properties of the substrate and screen printing process requirements.
(4) Wide selection of printing ink layer thickness
Due to the particularity of screen printing process, screen printing to the substrate ink thickness can be changed according to the requirements of the process.In general ink layer thickness can be achieved micron level.In the LIQUID crystal industry, screen printing ink thickness is relatively high.Due to a certain thickness of the ink layer has a strong ability to cover, so the screen printed graphics have a certain sense of three-dimensional 3ยท4.Because of the advantages of screen printing, screen printing is widely used in various industries.Therefore, it is very important to develop screen printing technology, which can promote the technological progress of screen printing industry and other related industries.
There are many kinds of screen printing machines. With the development of science and technology, people have more and more requirements on the performance of screen printing machines.Due to the influence of various factors, flat screen printing machine in my country compared with foreign silk screen printing machine, there is still a big gap, therefore, the key components of screen printer mechanism of structure analysis and research, to improve the level of China’s silk screen printing machine industry, is of great significance to improve the performance of the printing press.This topic comes from a project of cooperation between Beijing Qingda Technology Co., LTD. And a company in Guangdong province – automatic screen printing machine.