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How to Choose the Ink Pump of UV Printer?

How Does the Ink Supply System of an Inkjet Printer Work?

1. Working Principle of the Pump Assembly

Under the driving force of the paper feed motor or the ink pump motor, the pump assembly rotates the booster pulley, and the drive roller attached to the pulley starts to squeeze the ink tube. Its volume changes, forming a vacuum area just after the drive roller, which allows ink to enter the ink tube. At the same time, the pressure generated in front of the drive roller pushes the ink forward. Whether the ink is sucked or not depends on the rotation direction of the pulley. By switching the rotation direction of the pump motor, the ink suction operation can be switched between the color print head pump attachment! and the black print head pump attachment.

2. Working Principle of the Ink System

The ink system controls the entire working process of the ink supply system of the inkjet printer. It depends on the combination of the basic functions of the multi-type system, and also on the information transmitted by various types of timers, counters, signs, and sensors. Choose a more suitable ink operating system to protect the printhead and the ink supply system.

(1) Friction

When the carriage moves from left to right, the surface of the printhead comes into contact with the left blade of the cleaner blade integrated into the ink pump assembly. It generates friction to remove the hardened strong viscous ink and other impurities attached to the surface of the printhead and restore the printhead to the normal inkjet state to ensure the tightness with the pump attachment.

(2) Scratch

When the carriage moves from right to left, the surface of the print head comes into contact with the right blade of the cleaner blade integrated into the pump assembly and generates friction to remove all ink stains and dust attached to the surface of the print head and restore the print head normal inkjet state to ensure that the pump attachment fits snugly on the printhead.

(3) Main ink absorption

The ink pump assembly operates according to the specified number of revolutions. At this time, the printhead table is covered by the sealing cap, the air valve is closed, and the ink is sucked out from the printhead ink chamber and the ink tank. The sucked ink is either sent to the printhead ink chamber for printing or is used to deal with all the ink that has increased viscosity in the printhead nozzle and all the bubbles inside the printhead.

(4) Open ink absorption

The ink pump assembly operates according to the specified number of revolutions. At this time, the surface of the print head is covered by the sealing cap. The air valve is opened to suck out the ink in the pump accessory and dispose of it to remove the accumulated ink in the pump accessory.

(5) Absorb a small amount of ink

The pump assembly operates according to the specified number of revolutions, the surface of the printhead is covered by the sealing cap, and the air valve is closed. A small amount of ink is sucked from the ink chamber of the printhead to remove the extremely small air bubbles generated in the ink chamber of the printhead.

(6) Rinse

Move the carriage assembly to the flushing position, and drive the printhead to eject a certain amount of ink to prevent the ink viscosity in the nozzle from increasing.

(7) Instantaneous stimulation

To prevent the viscosity of the ink in the nozzle from increasing, a driving voltage and a pulse waveform are applied to the micro piezoelectric device to generate instantaneous oscillation so that the ink in the ink chamber of the printhead oscillates accordingly.

Ink Pump Used for UV Flatbed Printers

The ink pump is the heart of the entire ink supply system and is mainly used to deliver ink to the secondary ink cartridge. Model JH-30, 24v DC, suitable for UV ink. The power of this printer spare part is only 7w, and the specific flow rate is 300ml-400ml per minute. There are also other models with flow rates of 100ml-200ml or 200ml-300ml, etc.

Because it is specially designed for UV ink, it has high corrosion resistance. When choosing an ink pump, do not choose a non-UV-specific ink pump. During the use of the ink pump, a low voltage of 24v is used to ensure a long service life of the ink pump.

The flow value per minute of the ink pump is not as high as possible, nor as low as possible. The key is to look at the type and corresponding number of printheads matched with the equipment itself. If the flow rate is lower than the required amount of ink, ink breakage will occur during the printing process. If the flow value is higher than the required amount of ink, there will be ink dripping, ink overflow, etc. during the printing process.

Ink Pump Maintenance

In the process of daily use, the ink pump does not need to be cleaned every day. It should be cleaned once a week to wipe the ink marks and stains on the surface with a non-woven fabric dipped in alcohol.

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