我們所用的UV噴碼機，很多都是采用是理光G5的噴頭，理光G5s噴頭，也叫理光MH5220噴頭，是理光于2016年5月發布的一款工業噴頭。
理光G5s噴頭主要功能包括：
一、在4 x 320噴嘴中配置了1,280個噴嘴，打印頭實現了高分辨率，沒有墨點的顆粒狀外觀，并且能夠以多個打印頭交錯配置打印1,200 dpi分辨率。
二、多墨滴功能可以創建從2.5到9pl的各種墨滴尺寸。（請注意，采用多墨滴技術，墨滴快速連續噴射，然后在到達介質表面之前在飛行中合并）。
三、不銹鋼結構，耐用，使用壽命長。
四、內置加熱器，能夠噴射高粘度油墨。
五、兼容UV耐用墨水，用于標簽打印。
理光G5s噴頭內部：
理光G5噴頭的八大優點和使用要求說明
以下視頻是理光公司最新發布的，教你如何清洗理光G5噴頭、理光G5S噴頭，著重講解噴頭清洗過程中的一些要點和注意事項，希望對大家有所幫助。
Characteristics
Drop size of 2.5pl and Single-pass 600dpi
high-resolution printing and support for multiple ink colors
2.5pl drop size allows excellent print quality without graininess.With 1,280 nozzles configured in 4 x 150dpi rows, this head achieves high-resolution 600dpi printing. Additionally, the ink paths are isolated, enabling a single head to jet up to two ink colors.
Support for grey-scale
Achieves excellent gray-scale rendering at up to 4 levels.
*Although controls for up to 4 scales are provided, actual jetting depends on ink characteristics.
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.
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) , i.e. no ink contact.
Variable drop volume capability
Ricoh’s open waveform policy allows tailored multi-drop printing of between 2.5 – 9pl, enabling high quality grayscale printing.
Specifications / External dimensions
MH5220
MH5220
Method Piston pusher with metallic diaphragm plate
Print Width 54.1 mm(2.1″)
Number of nozzles 1,280 (4 × 320 channels), staggered
Nozzle spacing (4 color printing) 1/150″(0.1693 mm)
Nozzle spacing (Row to row distance) 0.93 mm
Nozzle spacing (Upper and lower swath distance) 9.31mm
Compatible ink UV
Total printhead dimensions 89(W) × 64.2(D) × 24.7(H) mm (3.5″ × 2.5″ × 1.0″) excluding cables & connectors
Weight 147g
Max.number of color inks 2 colors
Operating temperature range Up to 60℃
Temperature control Integrated heater and thermistor
Life 100 billion actuations per nozzle
Jetting frequency 30kHz
Drop volume Binary mode: 2.5pl / Grey-scale mode : 2.5-9pl *depending on the ink
Viscosity range 10-12 mPa?s
Surface tension 28-35mN/m
Grey-scale 4 levels
Ink port Yes
Number of ink ports 2 × dual ports
Alignment pin direction Front (standard)
Alignment pin direction Front (standard)
Separately sold parts FPC cable with connectors
*Results obtained from continuous jetting test using standard Ricoh test ink.
Nozzle
– Product appearance and specifications may be changed without prior notice for improvement purposes.