Constant flow high pressure printing system

摘要

A high pressure printing system comprising: a high pressure printing head, constructed and arranged for printing a printing fluid with a printing pressure in at least a part of a channel upstream of the printing head in an interval of 15-3000 bars; a pressure system comprising a printing fluid inlet and a plurality of pressure cylinders constructed and arranged for providing a constant flow of said printing fluid, the pressure cylinders being interconnected by at least a pressure valve; and a damper, connected between an outlet of the pressure system and said high pressure printing head, provided for damping the valve action of the pressure valve.

主权项

1. A high pressure printing system comprising:
a high pressure printing head, constructed and arranged for printing a printing fluid with a printing pressure in at least a part of a channel upstream of the printing head in an interval of 10-3000 bars; a pressure system comprising a printing fluid inlet and a plurality of pressure cylinders constructed and arranged for providing a constant flow of said printing fluid, the pressure cylinders being interconnected by at least a pressure valve functioning as an equalizing pressure valve arranged to equalize a pressure in the pressure cylinders when a pressure in an upstream cylinder of the pressure cylinders is higher than a pressure in a downstream cylinder of the pressure cylinders; and a damper, connected between an outlet of the pressure system and said high pressure printing head, provided for damping a valve action of the equalizing pressure valve; wherein the damper has a working pressure regime higher than the printing pressure; and wherein the high pressure printing system further comprises an overpressure valve arranged upstream of the printing head and downstream of the damper, an inlet of the overpressure valve being connected to an outlet of the damper and an outlet of the overpressure valve being connected to the channel upstream of the print head so as to provide the printing fluid to the print head, the overpressure valve operating at an activation pressure for providing a pressure regime upstream of the overpressure valve at least at the activation pressure in the working pressure regime of the damper.