Seiko Epson Corporation

Takayuki Yokoyama

Kinya Ozawa

Eiji Okamoto

Toshimitsu Hirai

Kazuya Kitada

Kaoru Momose

Yoichi Tanaka

A droplet discharging head executes multi-path recording in which dot recording in one main scanning line is completed by n main scans when n is an integer of 2 or more. The droplet discharging head includes: a plurality of nozzles configured to discharge a liquid as droplets; a pressure chamber defining substrate defining a pressure chamber communicating with the nozzles; a piezoelectric element including a first electrode, a second electrode, and a piezoelectric layer containing a perovskite-type composite oxide containing K, Na, and Nb as a main component; and a vibration plate forming a part of a wall surface of the pressure chamber and configured to vibrate by driving of the piezoelectric element. The number of paths n in the multi-path recording, a piezoelectric constant d[m/v] of the piezoelectric element, and a ratio x of a Na molar fraction to a total value of a K molar fraction and the Na molar fraction in the piezoelectric layer satisfy a relationship represented by a formula (1).

Droplet discharge head and droplet discharge apparatus

A three-dimensional shaping device includes: an ejection head including a nozzle configured to eject a binder containing water, a water-soluble resin, and a wetting agent, an individual liquid chamber communicating with the nozzle, an inflow path configured to flow the binder into the individual liquid chamber, and an outflow path configured to flow the binder out of the individual liquid chamber; and a circulation flow path configured to circulate the binder flowing out of the outflow path to the inflow path.

Three-dimensional shaping device

A droplet discharge apparatus includes a first head, a first-ink pack storing first ink, a second head, a second ink pack storing second ink, a cleaning liquid container storing cleaning liquid, a common flow path system, a cleaning liquid flow path, a first pump feeding the first ink from the first ink pack to the second ink pack through the common flow path system, a second pump feeding the cleaning liquid from the cleaning liquid container to the first ink pack through the cleaning liquid flow path and the common flow path system, a first valve controlling a liquid flow rate between the common flow path system and the first ink pack, a second valve controlling a liquid flow rate between the common flow path system and the second ink pack, a third valve controlling a liquid flow rate between the common flow path system and the cleaning liquid flow path, and a control unit, wherein the common flow path system, the first valve, and the second valve are located higher than a liquid surface in the first ink pack and a liquid surface in the second ink pack, and wherein the control unit transfers the first ink from the first ink pack to the second ink pack, and transfers the cleaning liquid from the cleaning liquid container to the first ink pack.

Droplet discharge apparatus

A droplet-discharge-apparatus includes a first-head, a first-ink-container storing first-ink, a second-head, a second-ink-container storing second-ink, a cleaning-liquid-container storing cleaning-liquid, a common-flow-path-system, a cleaning-liquid-flow-path, a first-pomp feeding the first-ink from the first-ink-container to the second-ink-container through the common-flow-path-system, a second-pomp feeding the cleaning-liquid from the cleaning-liquid-container to the first-ink-container through the cleaning-liquid-flow-path and the common-flow-path-system, a first-valve controlling a liquid flow rate between the common-flow-path-system and the first-ink-container, a second-valve controlling a liquid flow rate between the common-flow-path-system and the second-ink-container, a third-valve controlling a liquid flow rate between the common-flow-path-system and the cleaning-liquid-flow-path, and a control-unit. The control-unit transfers the first-ink from the first-ink-container to the second-ink-container by controlling the first-valve, the second-valve, the third-valve, and the first-pomp, and transfers the cleaning-liquid from the cleaning-liquid-container to the first-ink-container by controlling the first-valve, the second-valve, the third-valve, and the second-pomp.

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Shiojiri, Japan

Takayuki Yokoyama