Mitsubishi Heavy Industries Limited

Hiroyuki Takenaka

Hiroshi Ishibuchi

Makoto Ando

Yukuharu Seki

Kazukiyo Kohno

The present invention relates to a corrugator and corrugated fiberboard sheet manufacturing method which are capable of accurately adjusting the quantity of moisture included in a sheet to certainly suppress the warp deformation of the sheet with the passage of time. The corrugator has an adhering section equipped with a plurality of pressurizing units separately disposed in series along a sheet conveying direction, where a front linerboard and a rear linerboard are adhered to each other to form a corrugated fiberboard sheet and the corrugated fiberboard sheet formed in the adhering section is processed into a predetermined configuration in a processing section standing on the downstream side of the adhering section. The corrugator comprises sensors placed on the upstream side of the processing section for detecting moisture content conditions of the front linearboard and the rear linerboard, respectively, moisturizing units provided on the upstream side of the sensors and on the downstream side of the adhering section for directly supplying moisture to surfaces of the front linerboard and the rear linerboard and a controller for setting moisture quantities to be supplied from said moisturizing units on the basis of detection information from said sensors.

Corrugator and corrugated fiberboard sheet manufacturing method

The present invention relates to a single facer, which comprises a humidifying and heating unit placed on the upstream side of an air pressurization corrugating mechanism for humidifying and heating a corrugating medium and a feed mechanism for supplying the corrugating medium, processed by the humidifying and heating unit, to the air pressurization corrugating mechanism at a given speed. The corrugating medium is supplied at the given speed after the humidification and heating process for the corrugating medium, so that an air pressure to be taken at the corrugation is reducible and a predetermined flute configuration is maintainable. In addition, the spring back of the corrugating medium hardly occurs, which makes it possible to manufacture a corrugated fiberboard sheet with a high shock absorbing ability.

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Hiroshima-ken, Japan

Hiroyuki Takenaka