Diaphragm printing machine is a type of printing equipment commonly used to produce packaging materials, stickers, labels and other products. Its working principle can be divided into several steps: diaphragm tensioning, diaphragm transfer, printing, drying and winding.
First, the diaphragm is loaded into the diaphragm press. The diaphragm is usually made of polyester film, polyester coating film, etc., which has certain flexibility and wear resistance. When loading the diaphragm, it needs to be tensioned to ensure that it can maintain good stability during transmission and printing.
Next, the diaphragm transfer phase begins. Diaphragm presses usually use a coating printing method, that is, ink or ink is delivered to the surface of the diaphragm through a printing roller. During the transfer process, the diaphragm moves smoothly along a specified track through the action of the transfer roller and the tensioning roller. The transfer system is usually composed of a motor, a transmission device and a guide device, which is used to control the moving speed and direction of the diaphragm.
When the diaphragm is moved on the transfer device, the ink or ink is transferred to the diaphragm, which begins the printing stage. Printing is mainly achieved by printing rollers, which are usually made of materials such as metal or rubber. The ink or ink rolls down from the raised part of the printing roller through the ink hopper, and then forms a certain pressure and contact between the printing roller and the diaphragm to complete the printing process. Printing rollers can be replaced and adjusted according to different printing requirements to achieve printing effects of different colors and patterns.
After printing, the diaphragm enters the drying stage. The purpose of drying is to quickly evaporate the solvent in the ink or ink, so that the printed pattern can be quickly cured. The main drying methods are hot air drying, infrared drying and ultraviolet drying. Among them, ultraviolet drying is the most commonly used method, and the solvent remaining on the printed pattern is quickly cured by ultraviolet light source to speed up production efficiency.
Finally, the membrane after drying enters the winding stage. Winding consists mainly of winding the printed film for subsequent cutting, packaging and distribution. The film winding is usually made use of the role of the winding roller and the tensioning roller to achieve the uniformity and tightness of the film winding through appropriate tension control. The winding device usually includes a winding system, a tension control system and an automatic cutting device.
In summary, the working principle of diaphragm printing machine mainly includes several steps such as diaphragm tensioning, diaphragm transfer, printing, drying and winding. With precise mechanical and electrical control, diaphragm presses can efficiently print a variety of packaging materials and labels to meet the needs of different industries and users.
