RU1778528C - Hydraulic device for control of electric-jet printing - Google Patents

Abstract

The invention relates to inkjet printing and can be used in electric inkjet printing devices. The invention reduces ink consumption and improves marking quality by eliminating the evaporation of volatile components of the ink and preventing an increase in its viscosity, which impairs print quality. The system contains a supply tank 1 / Holes 2, 6 and 7 are made in the tank 1. The hole 2 is connected by a pipeline to a generator of 5 drops. The hole 6 through the pump 9 is connected to the trap 10, and the hole 7 is connected to the throttle valve 12, the outlet of which is led to the pipeline in the area between the trap 10 and the pump 9. 1 ill.

Description

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The invention relates to inkjet printing and can be used in electric inkjet printing devices.

A known hydraulic system is an inkjet printing device comprising an ink tank, a printhead moving forward and backward on a guide, a pump consisting of two coaxial cylinders (one of which works to create pressure in the system, and the other to suck out unused ink) and two coaxial pistons, a synchronization device that affects the synchronization between the pump drive and the print head drive so that the pump pumps ink only when the print head returns, the battery laziness, used to suppress pulsating pressure fluctuations, a filter and an ink collecting head.

A disadvantage of this device is the cyclical nature of pressure stabilization, which affects print quality.

The closest to the proposed device in technical essence and the achieved result is a hydraulic system for controlling an electro-inkjet printing device, comprising a consumable tank connected through a filter to a drop generator, a refueling tank connected to a trap for returning unused ink and equipped with an ejector to create a vacuum therein. necessary to suck out unused paint.

A disadvantage of the prototype device is that when air is ejected from the suction tank to create a vacuum in it, volatile components of the ink evaporate, resulting in poor print quality.

The aim of the invention is to reduce paint consumption by eliminating the evaporation of its volatile components.

The goal is achieved in that in the hydraulic control device for electronic inkjet printing, containing a supply tank connected through a filter to a droplet generator, a pump and a trap for unused ink, two holes are made in the upper part of the supply tank, one of which is connected through an introduced discharge pipe to the pump and through it, with a trap for unused paint, and another hole is connected through the introduced pressure stabilization unit with the introduced suction pipe in the area between the pump and the trap for unused paint.

The difference from the prototype is that in the upper part of the supply tank there are two holes, one of which is connected through the introduced injection

the pipeline with the pump and through it with a trap for unused paint, and another hole is connected through the introduced pressure stabilization unit with the introduced suction pipe on

the area between the pump and the trap for unused paint.

The drawing schematically shows a hydraulic control device for electric inkjet printing.

The hydraulic inkjet control device comprises an ink supply tank 1. In the lower part of the supply tank 1, an outlet 2 is made, connected through

the supply pipe 3 with a filter damper 4 and then with a drop generator 5.

Two holes 6 and 7 are made in the upper part of the tank 1. The hole 6 is connected

through the discharge line 8 with the discharge pump 9 and then with a trap 10 for unused paint droplets. The hole 7 is connected by a pipe 11 with a throttling valve 12. The output of the valve 12 is connected to the suction pipe 13 in the area between the pump 9 and the trap 10 for unused paint droplets, while the pump is equipped with a filter 14

The system operates as follows.

The injection pump 9 through the trap 10 for unused paint droplets, the suction pipe 13, the filter 14

pumps air through the discharge pipe 8 into the supply tank 1, creating a pressure P + L P. where P is the working pressure necessary to ensure a uniform stream of paint at the outlet of the droplet generator: AP is the excess pressure. The excess pressure D P is drained from the tank 1 through the pipe 11 and the throttling channel 12, while providing a constant working pressure P in the tank 1.

Under the action of the working pressure P, the ink from the tank 1 enters through a pipe 3 through a filter damper 4 into a droplet generator 5, where the ink stream is crushed into individual drops, which are then applied to

product surface for marking. Drops that were not used for marking fall into the trap 10 and are pumped by the pump 9 through the pipe 13 through the filter 14 and then through the pipe 8 to the tank 1. The paint is transferred to the tank 1 due to the poisoning of the overpressure AR through the pipe 11 through the throttling valve 12 and consumption of part of the paint from the tank. Due to the presence of a throttling valve 12 in the system, the outlet of which is connected to the suction pipe 13 in the area between the pump 9 and the trap 10. The system is closed, which eliminates the evaporation of the volatile components of the paint, and thus reduces paint consumption.

The hydraulic control device for electric inkjet printing, compared with the prototype, allows to reduce ink consumption by eliminating the evaporation of volatile components of the ink.

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Claims (1)

SUMMARY OF THE INVENTION A hydraulic inkjet control device comprising a supply tank connected through a filter to a droplet generator, a pump and a trap for unused ink, characterized in that, in order to reduce ink consumption by eliminating the evaporation of its volatile components, the upper part of the supply tank two holes, one of which is connected through the introduced discharge pipe to the pump and through it to the trap for unused paint, and the other hole is connected through the introduced and a pressure stabilization unit with a suction pipe inserted in between the pump and the trap for unused paint.