Toyota Jidosha Kabushiki Kaisha

Sintokogio, Ltd.

Hirotaka Kurita

Hirotsune Watanabe

Yusuke Kato

Masaomi Mitsutake

Takashi Nagaya

Takumi Maegawa

Koji Sakou

Youhei Noguchi

Katsutoshi Okumura

Masashi Morikawa

Shogo Izumi

Katsushige Yamamoto

Toshio Kanno

Masahide Seko

When molding surfaces (A) of a pair of dies () are to be cleaned by air-blowing, air is blown towards the molding surfaces (A) from blowing nozzles (A) of a cleaning blowing function portion () while a moving body () is reciprocatingly moved by driving force of a driving mechanism (). When a parting agent is to be applied to the molding surfaces (A) of the pair of dies (), the mold release agent is jetted out towards the molding surfaces (A) from spraying nozzles (A) of a parting agent application function portion () while the moving body () is reciprocatingly moved by the driving force of the driving mechanism (). In both of these situations, at the same time as the treatment of the molding surfaces (A), a cleaning brush () reciprocatingly moves together with the moving body () and sweeps a device floor surface ().

Die molding surface treatment device

An opening portion that is formed so as to pass-through an opening/closing plate portion of a gate, can be disposed at a region overlapping a lower end opening of a hopper. The opening portion is structured by a first pass-through portion, and a second pass-through portion that is formed so as to be continuous with the first pass-through portion. A width, in a direction orthogonal to a lined-up direction in which the first pass-through portion and the second pass-through portion are lined up, is narrower than the first pass-through portion. Further, a driving mechanism moves the gate such that the opening/closing plate portion moves in the lined-up direction as seen in a plan view. Based on a preset target value of weight of sand, a control section controls the driving mechanism so as to decrease an amount of overlap of the opening portion of the gate and the lower end opening of the hopper in a stepwise manner in accordance with an increase in the weight of the sand measured by a scale.

Measuring device

When pressing kneaded sand in a kneading sand tank into a mold by a pressing member, a pressing force applied to a kneaded sand layer in the kneading sand tank is monitored and a moving position of the pressing member is monitored from when the pressing member starts to move. A pressing start time at which the kneaded sand starts to flow into the mold is identified based on the pressing force applied to the kneaded sand layer in the kneading sand tank, and a pressing starting position of the pressing member at the pressing start time is identified. As a result, the pressing start time and the pressing starting position of the pressing member when the kneaded sand starts to flow into the mold are accurately identified, so the reliability of a filling evaluation of the kneaded sand into the mold is improved.

Filling method and filling device for kneaded sand

A core forming device is equipped with a kneading tank in which raw materials of a core are kneaded, a raw material supply unit that supplies the raw materials to the kneading tank, a mold that accommodates a kneaded material including the raw materials kneaded in the kneading tank and that forms the core, a piston that injects the kneaded material into the mold, a position sensor that detects a position of the piston, and a control unit that controls a supply amount of the raw materials supplied to the kneading tank from the raw material supply unit. The control unit determines the supply amount of the raw materials based on a difference between the position of the piston upon completion of injection and a reference position of the piston.

Core forming device and core forming method

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Toyokawa, Japan

Hirotaka Kurita