Liquid injection head, liquid injection recording device, and liquid flow rate adjustment method

Abstract

To provide a liquid injection head or the like that can improve the stability of liquid discharge. [Solution] A liquid spray head according to one embodiment of the present disclosure includes a spray unit having a plurality of nozzles for spraying liquid, a plurality of pressure chambers that communicate individually with the plurality of nozzles and are each filled with liquid, a liquid supply channel for supplying liquid to the pressure chambers, and a liquid recovery channel for recovering liquid from the pressure chambers, and a drive unit that drives the spray unit based on a drive signal having one or more pulses within a predetermined printing cycle, thereby causing the liquid filled in the pressure chambers to be sprayed from the nozzles. When using a predetermined liquid which is a thixotropic or pseudoplastic liquid, the drive unit performs micro-vibration driving on the predetermined liquid by including a micro-vibration pulse in the drive signal, which has a pulse width in a range in which the predetermined liquid is not discharged from the nozzles and is a pulse that causes the predetermined liquid to vibrate slightly.

Claims

1. A spray unit having a plurality of nozzles for spraying liquid, a plurality of pressure chambers that communicate individually with the plurality of nozzles and are each filled with the liquid, a liquid supply channel for supplying the liquid into the pressure chambers, and a liquid recovery channel for recovering the liquid from the pressure chambers, A drive unit drives the spray unit based on a drive signal having one or more pulses within a predetermined printing cycle, thereby causing the liquid filled in the pressure chamber to be ejected from the nozzle. Equipped with, The aforementioned drive unit is When using a predetermined liquid which is a thixotropic or pseudoplastic liquid, The drive signal includes a micro-vibration pulse, which has a pulse width within a range where the predetermined liquid is not discharged from the nozzle, and which is a pulse that causes the predetermined liquid to vibrate slightly, thereby performing micro-vibration driving on the predetermined liquid. Liquid spray head.

2. The aforementioned drive unit is In the plurality of nozzles, at a discharge timing that includes both a discharge nozzle from which the predetermined liquid is discharged and a non-discharge nozzle from which the predetermined liquid is not discharged, The micro-vibration drive is performed on the non-discharge nozzle among the plurality of nozzles. The liquid spray head according to claim 1.

3. The aforementioned drive unit is In the plurality of nozzles, at a discharge timing that includes both a discharge nozzle from which the predetermined liquid is discharged and a non-discharge nozzle from which the predetermined liquid is not discharged, The micro-vibration drive is performed on both the discharge nozzle and the non-discharge nozzle. The liquid spray head according to claim 1.

4. The aforementioned drive unit is The viscosity of the predetermined liquid approaches a predetermined target viscosity. During the aforementioned micro-vibration drive, the number of pulses of the micro-vibration pulses included within the printing cycle is adjusted. A liquid spray head according to any one of claims 1 to 3.

5. The drive unit performs the micro-vibration drive when filling the liquid injection head with the predetermined liquid. A liquid spray head according to any one of claims 1 to 3.

6. The injection unit further has a common flow path for the liquid that extends along the direction of arrangement of the plurality of pressure chambers and communicates with each of the plurality of pressure chambers. A liquid spray head according to any one of claims 1 to 3.

7. The liquid spray head is provided according to any one of claims 1 to 3. Liquid injection recording device.

8. When the spray unit, which has a plurality of nozzles for spraying liquid, a plurality of pressure chambers that communicate individually with the plurality of nozzles and are each filled with the liquid, a liquid supply channel for supplying the liquid into the pressure chambers, a liquid recovery channel for recovering the liquid from the pressure chambers, and a common liquid channel that extends along the direction in which the plurality of pressure chambers are arranged and communicates with each of the plurality of pressure chambers, is driven based on a drive signal having one or more pulses within a predetermined printing cycle, the liquid filled in the pressure chambers is sprayed from the nozzles, When using a predetermined liquid which is a thixotropic or pseudoplastic liquid, The drive signal includes a micro-vibration pulse, which has a pulse width within a range where the predetermined liquid is not discharged from the nozzle, and which is a pulse that causes the predetermined liquid to vibrate minutely. Micro-vibration driving is performed on a portion of the pressure chambers among the multiple pressure chambers along the common flow path for the predetermined liquid. A method for adjusting the flow rate of a liquid.

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