Printing unit of screen printing machine

Abstract

The invention provides a printing unit of a screen printing machine. The printing unit comprise a rack, a screen frame, a screen bracket, a roller and a printing cutter bit, wherein a rear supporting plate of the screen bracket is provided with a screen adjusting and locking device; four corners of the screen bracket are respectively provided with a screen clamping device; the printing cutter bit comprises a scraping and printing cutter, a cutter frame arranged on the scraping and printing cutter, a cutter bit box arranged on the cutter frame, a scraping and printing cutter pressurizing device, a scraping and printing cutter angle adjusting and locking device, a scraping and printing cutter position adjusting device and a scraping and printing cutter switching device. According to the printing unit provided by the invention, by adopting an oblique table type screen frame, the screen bracket only needs to be obliquely lifted by hands when screen cloth needs to be cleaned, the screen bracket can be supported by an air spring, and thus the screen cloth can be more simply and conveniently cleaned; meanwhile, a closed oil way is formed by a decompression valve, an oil storage seat, an oil cylinder, an oil valve seat and the like, a control air way is formed by an external air source and the decompression valve, thus the cutter frame is controlled, and the stability of the cutter frame is greatly increased.

Description

technical field [0001] The invention belongs to the field of printing equipment, and in particular relates to a printing unit of a screen printing machine. Background technique [0002] A printing press is a machine that prints text and images. Modern printing machines are generally composed of plate loading, ink application, embossing, paper feeding and other mechanisms. Its working principle is: first make the printing plate of the text and image to be printed, install it on the printing machine, and then apply the ink to the place where the text and image are on the printing plate manually or by the printing machine, and then transfer it directly or indirectly Print onto paper or other substrates such as textiles, sheet metal, plastic, leather, wood, glass, and ceramics to reproduce the same print as the printing plate. The invention and development of the printing press played an important role in the spread of human civilization and culture. [0003] During the print...

AI Technical Summary

Problems solved by technology

However, the previous pressure maintaining devices basically used cylinders to maintain pressure. Due to air leakage in the air circuit, the pressure maintaining of the cylinder was unstable, and the final printing effect was not good.

Images