Features RISO TECHNOLOGIES' Inkjet heads

1. Jetting of high viscosity ink

RISO TECHNOLOGIES' inkjet heads are receiving good reputation for its performance with high viscosity ink.
Up to 43.2[mPa・s] with ink recirculation type CF1 and 18.0[mPa・s] with non-recircuation type CA4.
Wide operating window (OW)*1 and stable jetting peformance are secured.

The data of Ink visicosity VS Operating window

  • *1:
    Operating window (OW): Range of driving voltage for stable jetting
  • The viscosity shown above is the actual viscosity of ink at the moment of jetting.
  • Inks shown above are inks that were actually tested. Performance varies depending on ink.

Print samples with high viscosity ink

Print samples with high viscosity ink

<Printconditions>
Inkjet printhead: CF3R
Ink: UV ink
Viscosity: 30 [mPa・s]@25℃
The actual temperature during jetting: 25℃
Frequency: 13.8 kHz
Grayscale Level: 4 levels (3 drops)
Print gap: 2.0 mm
Resolution: 600 x 600 dpi
Linear Speed: 35 m/min

  • High resolution printing is secured with high viscosity ink.

2. Wider print gap

RISO TECHNOLOGIES' inkjet heads offer good print quality with wider print gap.
Below are actual print samples with the print gap of 2.0mm and 5.0mm.

Print sample

Print sample with wider print gap

<Printconditions>
Inkjet printhead: CF3R
Ink: UV ink
Viscosity: 30 [mPa・s]@25℃
The actual temperature during jetting: 25℃
Frequency: 13.8 kHz
Grayscale Level: 4 levels (3 drops)
Print gap: 2.0 / 5.0 mm
Resolution: 600 x 600 dpi
Linear Speed: 35 m/min

  • The above are print samples actually tested with UV ink.
  • Performance varies depending on ink.

RISO TECHNOLOGIES' unique and excellent technology of mechanical process and jetting control
minimizes deviation of jetting angles and achieves accurate dot placement even with wider print gap.

3. Drop volume adjustment on each nozzle

RISO TECHNOLOGIES' inkjet heads (CF3/CF3R) are capable of adjusting jetting volume of selected nozzles with its fine tuning fucntion.

Explanation about fine tuning fuction Variation of jetting volume can be uniformed by fine tuning function at micro level.

The fine tuning function helps enhance print quality.
By adding 15 levels of the fine tuning function onto original 7 gray levels printing,it is possible to achieve up to 91 levels of gradation in total on each pixel.
The fine tuning function also helps reduce density variation which is visible at the borders between the inkjet heads mounted.

Printing with fine turning function *Print result

Original 7 gray levels + 15 levels of fine tuning = 91 levels of gradation

Fine tuning at the border of 2 inkjet heads

Printing with fine tuning function

4. Excellent print quality

Smooth tone and less graininess

Multiple drop jetting technology*1 up to 7 drops creates 8 levels of density gradation within a single dot. This gives a smooth tone of image from light to dark with less graininess.

  • *1:
    A multi-value printing method that switches dot size by controlling the number of times ink is ejected.

Printing with muti drop technology

Printing with higher resolution

Fine art graphics can be reproduced with small drop jetting technology.

Printing with higher resolution

Native resolution of 600dpi enables a clear and sharp printing for as small as 2pt (0.6mm) characters.

Print samples for small chracters

<Printconditions>
Inkjet printhead: CF3R
Ink: UV ink
Viscosity: 30 [mPa・s]@25℃
The actual temperature during jetting: 25℃
Frequency: 13.8 kHz
Grayscale Level: 4 levels (3 drops)
Print gap: 2.0 / 5.0 mm
Resolution: 600 x 600 dpi
Linear Speed: 35 m/min

5. Wide range of applications

RISO TECHNOLOGIES' inkjet head technologies open a door to many industrial applications, from out-door signage to labels, packages and cardboard printing.

labels

PCB

Outdoor signage

packages

6. Manufacturing capability ensuring stable production quality

Inkjet Head

RISO TECHNOLOGIES' on-demand piezo type industrial inkjet heads are manufactured using microfabrication technology and high-precision gluing processes in clean rooms equivalent to ISO class 6.
We established a manufacturing capability to ensure stable production and stable quality for customer's satisfaction around the world.

Component processing

Parts processing

We procure raw materials from outside and perofrm precsion machining process in-house. In order to ensure stable quaity and production efficiency, we employ our own know-how and technology, as well as years' of accumulated production record, to process parts.

Glueing process

Adhesion process

To ensure the characteristics of inductrial inkjet head, we have achieved high-precision glueing technology to secure a very thin adhesive layer with a micrmeter level.
Highly managed quality control on production equipments and production record is importantto maintain excellent production quality.

Inspection process

Inspection process

With ISO9001 quality management system certification, we can provide products and services with reliable quality, performance, and high convenience based on our excellent proprietary technology.We ensure stable quality by inspecting and managing each process, and conducting print test and appearance inspections on every completed inkjet heads, ensuring that our products are safe and secure for customers to use.

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