| 摘要 |
A printing head assembly (100) for printing a UV curable ink on a substrate (200) comprising: a base plate (18) with an array of nozzle orifices (16), an ink supply (20; and an array of nozzle assemblies (10), each nozzle assembly comprising: a pin (14); a piezo actuator (12), wherein said pin (14) is arranged in relation to said piezo actuator (12) so that in the resting position of the piezo actuator (12), the pin (14) is caused to close said nozzle orifice (16) and so that in the actuated position, the pin (14) is caused to open the nozzle orifice (16) so as to allow said ink to be released through the nozzle orifice (16) onto said substrate (200). The printing head assembly (100) being connectable to a UV light source (30) for curing said ink released onto the substrate (200).
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