公开(公告)号：US20160121611A1

公开(公告)日：2016-05-05

申请号：US14991430

申请日：2016-01-08

Applicant: OCE-TECHNOLOGIES B.V.

Inventor： Hans REINTEN ,  Hendrik J. STOLK ,  Patrick H.M.A. BRANDTS

IPC: B41J2/14 ,  B41J2/16

CPC classification number: B41J2/14274 ,  B41J2/14233 ,  B41J2/161 ,  B41J2/1612 ,  B41J2/1623

Abstract: An inkjet print head for expelling a droplet of a fluid through a nozzle orifice comprises a fluid channel for holding a channel amount of fluid, the fluid channel comprising a pressure chamber in fluid communication with the nozzle orifice and a piezo actuator. The piezo actuator comprises an active piezo stack, which stack comprises a first electrode, a second electrode, and a piezo-material layer arranged between the first and the second electrode, and the piezo actuator comprises a membrane having a first side and a second side, the second side being opposite to the first side. The active piezo stack is provided at the first side and the pressure chamber at the second side such that the membrane forms a flexible wall of the pressure chamber. The fluid channel, when holding the channel amount of fluid, has a fluid compliance and the piezo actuator has an actuator compliance. In accordance with the present invention, the actuator compliance is larger than the fluid channel compliance such to have a high energy coupling efficiency and consequently a low power dissipation.

Abstract translation: 用于通过喷嘴孔排出流体液滴的喷墨打印头包括用于保持通道量的流体的流体通道，流体通道包括与喷嘴孔流体连通的压力室和压电致动器。 压电致动器包括有源压电叠层，该叠层包括布置在第一和第二电极之间的第一电极，第二电极和压电材料层，并且压电致动器包括具有第一侧和第二侧的膜 第二侧与第一侧相对。 主动压电堆叠设置在第一侧和第二侧的压力室处，使得膜形成压力室的柔性壁。 流体通道在保持流体的通道量时具有流体顺应性，并且压电致动器具有致动器顺从性。 根据本发明，致动器顺从性大于流体通道顺应性，从而具有高的能量耦合效率，从而具有低的功率耗散。