Casting device and casting method
AssigneeSintokogio, Ltd.
InventorsKeishiro KANEDA, Yukiyoshi FUNAKOSHI
Life of this patent
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Abstract
A casting apparatus includes an upper frame to which an upper mold is attached, a lower frame to which a lower mold is attached, a first hydraulic actuator, a hydraulic unit, a first main link member, a first sub-link member and a rotation actuator, and the upper frame, the lower frame, the first main link member and the first sub-link member constitute a first parallel link mechanism. The hydraulic unit causes the electric motor to operate at a predetermined number of revolutions when performing mold opening or mold closing and causes the electric motor to operate at a limit number of revolutions smaller than the predetermined number of revolutions when not performing mold opening or mold closing.
Claims20
A casting apparatus that forms a casting by using an upper mold and a lower mold, which can be opened, closed, and tilted, into which molten metal is poured by using gravity, the casting apparatus comprising:
- a first hydraulic actuator configured to move either the upper mold or the lower mold up and down to thereby open or close the upper mold and the lower mold;
- and
- a hydraulic unit configured to drive the first hydraulic actuator, wherein
- the hydraulic unit comprises:
- a hydraulic pump configured to supply hydraulic oil to the first hydraulic actuator;
- an electric motor configured to drive the hydraulic pump;
- and
- a drive control unit configured to control a number of revolutions of the electric motor, and
- when performing mold opening or mold closing, the drive control unit operates the electric motor at a predetermined number of revolutions, and when not performing mold opening or mold closing, the drive control unit operates the electric motor at a limit number of revolutions smaller than the predetermined number of revolutions.
A casting method using a casting apparatus that forms a casting by using an upper mold and a lower mold, which can be opened, closed, and tilted, into which molten metal is poured by using gravity, the casting apparatus comprising:
- a first hydraulic actuator configured to move either the upper mold or the lower mold up and down to thereby open or close the upper mold and the lower mold;
- and
- a hydraulic unit configured to drive the first hydraulic actuator, wherein
- the hydraulic unit comprises:
- a hydraulic pump configured to supply hydraulic oil to the first hydraulic actuator;
- and
- an electric motor configured to drive the hydraulic pump, and
- the method comprises a mold closing step and a mold opening step,
- in the mold closing step and the mold opening step, the electric motor operates at a predetermined number of revolutions, and
- when not in the mold closing step or in the mold opening step, the electric motor operates at a limit number of revolutions smaller than the predetermined number of revolutions.
Dependencies are inferred from the claim text.