Circular ink supply system

Abstract

The invention provides a circular ink supply system. The system comprises a main ink bucket, an ink inlet pump, an ink inlet ink box, a nozzle, an ink returning ink box, an ink returning pump, an ink returning degassing filter and a controller; the main ink bucket is connected with the ink inlet pump, the ink inlet pump is connected with the ink inlet ink box, an ink outlet of the ink inlet ink box is connected with a nozzle ink inlet, a nozzle ink returning opening is connected with an ink inlet of the ink returning ink box, an ink outlet of the ink returning ink box is connected with the ink returning pump, the ink returning pump is connected with the ink returning degassing filter, and the ink returning degassing filter is connected with the ink inlet ink box; a first pressure detection device is arranged in the ink inlet ink box, a second pressure detection device is arranged in the ink returning ink box, the controller controls the rotating speed of the ink inlet pump and the rotating speed of the ink returning pump according to the pressure, detected by the first pressure detection device, of the ink inlet ink box and the pressure, detected by the second pressure detection device, in the ink returning ink box, and the negative pressure of the ink inlet ink box and the ink returning ink box meets the stable pressure difference. On the basis of the pressure detection result, the rotating speed of the ink inlet pump and the ink returning pump is adjusted to achieve circular ink supply, and the system is simple, safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of digital printing, in particular to a circulating ink supply system. Background technique [0002] In the field of inkjet printing technology, an inkjet printing head that needs to be supported by a circulating ink supply system is usually used in an inkjet printing machine, referred to as a nozzle for short. Utilizing the circulation of ink in the nozzle, the impurities and air bubbles in the nozzle can be taken away, so as to prevent them from clogging the nozzle or affecting printing. At the same time, it can also promote thermal circulation and ensure the stability of ink viscosity. [0003] The prior art provides a circulating ink supply system that works in series, such as figure 1 As shown, the circulating ink supply system includes a main ink tank 101, the ink outlet of the main ink tank 101 is connected with the ink inlet of the ink inlet pump 102, and the ink outlet of the ink inlet pump 102 is ...

AI Technical Summary

Problems solved by technology

[0005] In view of the above existing problems, the present invention provides a circulating ink supply system, which is used to overcome the defects of poor safety and high complexity of the ink supply system easily caused by the existing gas pressure circulation control method

Images