Tire vulcanizer
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United States of America Patent
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Jan 29, 2013
Grant Date -
Sep 29, 2011
app pub date -
Mar 3, 2011
filing date -
Mar 23, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In a tire vulcanizer configured to perform opening and closing of a mold 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 by the de-excitation of an 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.
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