The circular screen printing machine consists of four main parts: feeding unit, printing machine unit, drying unit, and dropping unit. The fabric line speed between the four units should be maintained simultaneously
Maintain synchronization, so that the fabric will not be affected by unstable tension and the printing quality will not be affected. If the synchronization is poor, it can seriously cause local accumulation or breakage of the fabric. Early circular screen printing machines often used common power DC motors to drive, with high failure rates and poor synchronization effects. In the mid to late 1990s, with the decrease in the price and widespread application of frequency converters, the unit transmission of circular screen printing machines adopted AC frequency conversion transmission technology, and its synchronization control method generally used synchronous controllers and PLCs to achieve unit synchronization.
Under the action of the pressure cylinder during printing, the blade is tangent to the center of the bottom of the circular mesh. The blade exerts pressure on the circular mesh and the printed fabric, causing elastic deformation of the blade and forming a certain angle (wedge angle) with the inner wall of the circular mesh, allowing the ink to be printed onto the fabric through the patterned mesh of the circular mesh. In addition, the manual stroke adjustment device can be used to adjust the downward stroke of the scraper and adjust the angle of the scraper to change the deformation of the blade, adjust the pressure and pulp output during printing.
For permanent magnet, the suction force on the magnetic rod can be adjusted by changing the distance between the magnet and the magnetic rod. Electromagnetic magnetic tables all use DC power supply and require specialized control circuits to adjust the magnetic force. The purpose is to control the magnitude of the magnetic force by changing the voltage of the electromagnetic coil. The early magnetic control circuit was relatively simple, consisting of a transformer T, a switching switch K, a rectifier circuit z, and an electromagnet R. The voltage adjustment of the electromagnet was achieved by connecting different voltage levels at the output terminal of the transformer through the switching switch. This method is gear adjustment and cannot uniformly and smoothly adjust the magnetic force.
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