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US 2011/0236514 A1Published application
Tire vulcanizer
AssigneeKabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
InventorsYasuhiko FUJIEDA, Masaharu SHIBATA
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AssigneeKabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
InventorsYasuhiko FUJIEDA, Masaharu SHIBATA
Estimating the term…
In a tire vulcanizer according to the present invention configured to perform opening and closing of a mold by an elevating means using an efficient ball screw shaft or the like, a top mold mounting member holding a top mold is lifted and lowered by rotating the ball screw shaft with a driving mechanism to vertically lift and lower a ball nut, and the lifting and lowering of the top mold mounting member is stopped by fixing the ball screw shaft with an excitation-free electromagnetic brake connected directly to the ball screw shaft independently from the driving mechanism. According to such a structure, the opening and closing of the mold can be stopped, even if abnormality of the driving mechanism or the brake occurs.
A tire vulcanizer comprising:
A brake control method for a tire vulcanizer configured to open and close a mold formed of a top mold and a bottom mold by vertically lifting and lowering a ball nut using rotation of a ball screw shaft with an inverter motor, the ball nut screwed to the ball screw shaft, to thereby lift and lower a top mold mounting member connected to the top mold, the method comprising:
Dependencies are inferred from the claim text.