The author analyzes the working principle of the shading door of the printing machine, replaces the original travel switch with a metal sensor switch, and transforms the shading door, which not only solves the above problems, but also rejuvenates the printing machine. Here, the author will share this transformation process with the industry, this article will introduce you to the screen printing machine manufacturers. Prepare the work before printing. Preparation before printing is the basis for ensuring the quality of printing and printing. Therefore, before the printing work is carried out, it is necessary to carry out a complete and careful inspection of the printing machine to ensure that the appearance thereof is lubricated, flat and free of dirt, scratches and the like. In addition, it is necessary to keep the stencil of the printing machine to a certain extent, the film is not dirty, and the transparent glass plate is clean. The printing machine should be able to obtain a vacuum of 80 kPa (650 mmHg) within 60 s; the vacuum of the printing machine should not be reduced by 20 kPa (150 mmHg) 5 minutes after the power of the printing machine is turned off. The uniformity of the light source of the printing machine is required to be above 86% (using precision measuring instruments). Use a 30% dot film film to print a PS plate. After development, measure with a densitometer. The error between the middle and the four peripheral angles is generally less than 2%, so that it will not appear when printing large-area color blocks. Color difference. In recent years, the printing industry has encountered problems such as increased labor costs and fierce competition for homogenization. Many printing companies are actively seeking cost reduction and efficiency measures to seek a better space for survival and development. Therefore, this exhibition actively catered to the market development direction, with high-speed automation, intelligent environmental protection equipment as the target of the exhibition, and finally the exhibition was successful, and achieved very obvious economic and social benefits. Article source address: http:// Henan WonkingChina I/E Co., Ltd. , https://www.wshousewares.com