Inkjet recording device

Abstract

The present invention provides an inkjet recording device that can suppress the occurrence of residual ink on the ink ejection surface after cleaning and maintain the ink ejection performance of the recording head in a suitable manner. [Solution] The inkjet recording device 1 performs a control to complete the cleaning operation of the ink ejection surface 52F by first performing a wiping operation to eject ink onto the ink ejection surface 52F, followed by a second wiping operation to supply cleaning fluid to the ink ejection surface 52F. The wiping speed during the first wiping operation is greater than or equal to the wiping speed during the second wiping operation, and the wiping speed Wc [mm / s] of the cleaning fluid during the final second wiping operation satisfies the following equation (1) with respect to the viscosity Vc [mPa·s] of the cleaning fluid. log Vc≧(-4×Wc+670) / 1000 (1)

Claims

1. A recording head having an ink ejection surface from which nozzles for ejecting ink onto a recording medium open, A cleaning fluid supply device that supplies cleaning fluid to the ink ejection surface, A wipe unit equipped with a blade for cleaning the ink ejection surface, A control unit that controls the operation of the recording head, the cleaning fluid supply device, and the wipe unit, Equipped with, The control unit, A first wiping operation in which only the ink is discharged onto the ink discharge surface, or the cleaning fluid is supplied along with the discharge of the ink and wiped by the blade, A second wiping operation in which only the cleaning liquid is supplied to the ink ejection surface and wiped by the blade, By combining these, a cleaning operation can be performed to clean the ink ejection surface, The aforementioned cleaning operation is The control is executed to perform the second wiping operation last, following the first wiping operation, to terminate the cleaning operation. The wiping speed during the first wiping operation is greater than or equal to the wiping speed during the second wiping operation. An inkjet recording apparatus characterized in that, with respect to the viscosity Vc [mPa·s] of the cleaning fluid, the wiping speed Wc [mm / s] of the cleaning fluid in the second wiping operation, which is the last operation of the cleaning process, satisfies the following formula (1). log Vc≧(-4×Wc+670) / 1000...(1)

2. The inkjet recording apparatus according to claim 1, characterized in that, in the cleaning operation, the second wiping operation is performed at a speed lower than the wiping speed of the last second wiping operation, the first wiping operation is performed, and finally the second wiping operation is performed to end the cleaning operation.

3. The inkjet recording apparatus according to claim 1, characterized in that the viscosity of the cleaning fluid is 2 [mPa·s] or more and 15 [mPa·s] or less.

4. The inkjet recording apparatus according to any one of claims 1 to 3, characterized in that the static surface tension of the cleaning liquid is lower than the static surface tension of the ink.

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