Abstract: The invention relates to an apparatus for demolishing a reactor shield wall. The apparatus has a pillar (2) extending from the top side of the reactor toward the bottom of the reactor, an upper support device (3) for supporting the upper portion of the pillar (2) at the top side of the reactor, and cutting devices (5, 6) mounted to the pillar so as to be upwardly and downwardly movable along the pillar (2). The pillar (2) is rotatably supported by the support device (3). The upper support device (3) has drive devices (30, 31, 32) for rotating the pillar (2). The cutting devices (5, 6) are caused to swing in the reactor interior by rotating the pillar (2). The drive devices are disposed at the top side of the reactor, and this permits easy maintenance and inspection.

Abstract: The specification describes a tire vulcanizer adapted for use in performing the shaping and curing operation of a green tire efficiently and safely. The vulcanizer is characterized by means for lifting or lowering an upper ring, which includes a rotary means consisting of a ball screw shaft and nut cylinder, and a mechanism adapted to render said ball screw shaft rotate freely upon receiving a signal which is generated upon the completion of the shaping and curing operation.