Screen printing is called universal printing and has a wide range of applications. It has great potential for development and development. At present, there are more than 40 varieties of screen printing machinery, such as pneumatic, semi-automatic, 3/4 automatic, fully automatic, monochrome and multi-color, flat and curved machines. From the model point of view, in addition to the splicing type of domestic screen printing machine, the production of four-column lifting and elastic table stretching machine is more and more, the production of eight-color automatic flat screen printing machine has filled the model of China. The blank, this article will introduce you to the screen stretcher.
The stretcher is a special auxiliary machine for screen printing and plate making. It stretches the screen on the frame according to a certain tension, and is an indispensable machine for the plate carrier. Pneumatic and mechanical stretchers are popular in the market.
Of course, there is also a type of stretcher, called a fully automatic hydraulic netting machine. This type of pump net machine will have a relatively high degree of automation, and the application process shows great efficiency, high quality and low consumption. Many features, such as less labor, are getting more and more attention from users, and are the main equipment for high-precision stretch nets.
Stretching machines are mainly found in the market: manual stretcher and pneumatic stretcher; among them, manual stretcher is divided into bead type and collet type. The manual bead type stretcher has become the first consideration in the printing industry due to its relatively low cost.
Photosensitive adhesive screen printing can use diazo photosensitive adhesive, the coating tank is mostly stainless steel, the photosensitive liquid is poured into the tank to account for about 1/2, the stretched screen printing is inclined by 70 °, the coating tank and The lower end of the screen is in contact with it and slowly lifted up, coating from the bottom to the top of the mesh. Note that the speed should not be too fast, so as to avoid foaming of the photosensitive liquid and pinholes on the film surface. After the business card printing, the screen version was inverted and coated once, and then dried in a 40 ° C drying oven. After drying, the screen surface of the screen is applied 2 to 3 times in the same manner, and the film thickness is 10 to 30 μm, and the disc can be printed.
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