Screen printing and screen printing machine
Screen printing, also known as universal printing, originated in China and has a history of more than 2,000 years. It is known as the four major printing technologies together with flat printing, letterpress printing, and gravure printing. The selection of printing materials for screen printing is very wide, and it can be printed on many materials, such as screen printing on textiles, solar silicon wafers, plastics, liquid crystal glass, various metals, ceramics and other materials, which are used in the advertising industry. , publishing industry, construction industry, art industry, liquid crystal industry, electric
Sub-industry, printing and dyeing industry and other fields have a very wide range of applications. In short, screen printing can complete the printing task of any object regardless of its thickness, size, material, and whether it is flat or curved.
Screen printing has the following characteristics:
1. The pressure of the scraper is small, and the selection of printing materials is more
The squeegee pressure is the printing pressure, which acts on the substrate through the screen. Wire mesh materials can be divided into many types, but what they have in common is that the wire mesh is elastic and soft. Therefore, high-quality printing can be maintained whether it is screen printing on softer materials such as films, plastics, and textiles, or on harder materials such as liquid crystal glass and solar silicon wafers.
2.It can print substrates of various sizes or shapes
When the sizes of the substrates are different, the designer can design worktables of different sizes and screen meshes of different sizes to meet the different sizes of the substrates, ranging from small-format circuit boards to large-format textile printing. Since the screen can be printed on a flat surface, a curved surface, or even a spherical surface or a concave-convex surface, screen printing has a wide range of choices for substrates, from flat liquid crystal glass to curved plastic printing. It will be all right.
3.Use a wide range of ink types
Screen printing is to apply a certain pressure to the screen through a scraper, and squeeze the ink on the screen to the substrate through the mesh gap on the screen. Screen printing uses the principle of missing printing. Therefore, as long as it is a material that can pass through the screen gap, it can be used as a screen printing ink, such as water-based or oil-based liquids (paints, paste adhesives, etc.), or solid powders. It is important to choose the right ink based on the material properties of the substrate and the requirements of the screen printing process.
4.Wide selection of printing ink layer thickness
Due to the particularity of the screen printing process, the thickness of the ink printed on the substrate by screen printing can be changed according to the requirements of the process. In general, the thickness of the ink layer can be obtained in the micrometer level. In the liquid crystal industry, the ink thickness of screen printing is relatively high. Since the ink layer of a certain thickness has a strong covering ability, the graphics printed by the screen have a certain three-dimensional effect. Because screen printing has the incomparable advantages of other printing above, screen printing is widely used in various industries. Therefore, the development of screen printing technology is very important, which can promote the technological progress of the screen printing industry and other related industries.
There are many types of flat screen printing machines. With the development of science and technology, people have more and more requirements for the equipment performance of screen printing machines. Due to the influence of various factors, there is still a big gap between our domestic flat screen printing machines and foreign screen printing machines. Therefore, the structural analysis and research of the key components of the screen printing machine mechanism It is of great significance to improve the industry level of my country’s screen printing machine and improve the performance of the printing machine.