Automatic pressure relieving system at outage of ink-jet printer

Abstract

The invention provides an automatic pressure relieving system at an outage of an ink-jet printer. The automatic pressure relieving system comprises a spray head, wherein a main ink supply pipe and an exhaust pipe are connected to the spray head, a pressure relieving pipe used for relieving pressure is connected between the main ink supply pipe and the exhaust pipe, and a one-way valve is arranged on the pressure relieving pipe. The one-way valve comprises a shell, wherein the shell comprises an installing cavity, a valve element made of elastic rubber is arranged in the installing cavity, the valve element comprises a small head part and a big head part, the small head part is provided with a closed flat first channel which can be elastically expanded to be through, the big head part is provided with a constantly through second channel which is communicated with the first channel, the big head part is connected to the side where the exhaust pipe is located, and the small head part is connected to the side where the main ink supply pipe is located. When the outage suddenly happens to the ink-jet printer, an uninterruptible power supply is not needed, ink with pressure in the main ink supply pipe and the spray head can be timely discharged into an ink box, the situation that the ink continues to be sprayed out through the spray head when the ink-jet printer stops working is avoided, as a result, code spraying quality is improved, and contamination of a working environment and waste of the ink are avoided.

Description

technical field [0001] The invention relates to inkjet printers, in particular to an automatic pressure relief system for inkjet printers when power is cut off suddenly, which can release the pressured ink in ink tubes in time. Background technique [0002] The inkjet printer is a device that is controlled by software and uses a non-contact method to mark on products. Existing inkjet printers apply a certain pressure to the ink in the system through the main pump, so that the ink is ejected through the nozzles on the print head. And by adding the crystal oscillation signal above the nozzle, the continuous ink line is split into ink droplets with the same frequency, equal size and certain spacing. Then, the ink droplets are charged separately when passing through the charging electrodes, and the amount of charge is determined by the central processing unit CPU. Control; then through the detection electrode to detect whether the actual charged amount and phase of the ink drop...

AI Technical Summary

Problems solved by technology

However, when there is a sudden power failure or a sudden power failure of the inkjet printer, various components such as the valve on the ink pipeline stop working, and the exhaust valve on the exhaust pipe cannot be opened, and the main pump no longer supplies pressure to the ink. When the diameter of the elastically deformed ink delivery tube begins to shrink and reset, the ink in the ink delivery tube continues to generate pressure, which eventually causes the ink to continue to drip from the nozzle of the jet printer that has stopped working.

At present, in order to solve the above situation caused by the sudden power failure of the inkjet printer, it is usually necessary to reserve an uninterruptible power supply for the inkjet printer, which not only increases the cost, but also takes up space, which is not convenient for on-site management. Even if the power fails, the above problems cannot be solved.

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