Here are the MH2620/2820 Ricoh nozzle's characteristics:
1. Droplet enlargement
This head is capable of jetting a variety of ink types in large droplet sizes. Please choose from two models to suit your application: Multi-drop 15-45pl (MH2620) or 27-54 pl (MH2820)
Heated operation up to 80ºC
The built-in heater heats the ink to up to 80ºC for jetting, providing support for high-viscosity inks.
Variable drop volume capability
2. The multi-drop capability allows the creation of a range of drop sizes enabling grey-scale printing.
Excellent durability and extended service life
Ricoh inkjet print heads are made of stainless steel. These heads are highly robust and offer excellent anti-corrosion properties for multiple inks, resulting in excellent durability and extended service life.
3. Support for different inks
With its built-in heater, these heads are capable of jetting high-viscosity inks. Additionally, the ink path is isolated from the actuator (piezo elements) , and no ink contact.
MH2620/2820 Details:
| Model | MH2620/MH2820 |
| Method | Piston pusher with metallic diaphragm plate |
| Print Width | 64.9 mm(2.6") |
| Number of nozzles | 384 (2 × 192 channels), staggered |
| Nozzle spacing (Within a row) | 1/75"(0.339 mm) |
| Nozzle spacing (Row to row distance) | 0.9948 mm |
| Compatible ink | UV, Solvent, Aqueous, Others. |
| Total printhead dimensions | 120(W) × 75.56(D) × 13.2(H) mm (4.72" × 3.0" × 0.5") excluding cables |
| Weight | 108g |
| Max.number of color inks | 2 colors |
| Operating temperature range | Up to 80℃ |
| Temperature control | Integrated heater and thermistor |
| Drop volume/Jetting frequency | (MH2620):15pl - 30kHz, 30pl - 20kHz, 45pl - 14kHz *depending on the ink (MH2820): 27pl - 30kHz, 54pl - 20kHz |
| Viscosity range | 11-13 mPa•s |
| Surface tension | 28-35mN/m |
| Grey-scale | (MH2620): 4 levels (MH2820): 3 levels |
| Total Length | 256 mm (standard) including cables |
| Ink port | Yes (standard)/No (optional) |
| Number of ink ports | 1 color : 1 × dual/2 colors: 2 × dual |
| Alignment pin direction | Front (standard)/Back (optional) |
