CENTRAL MECHANISM OF TYRE VULCANIZER

• Main Authors: ASADA MITSUNORI, KINO NATSUJIROU, NAKAGAWA KAZUHIKO, KAWAHARA MASAKATSU, FUJIEDA YASUHIKO, AMANO ITARU
• Format: Patent
• Language: English
• Published: 05.03.1982
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PURPOSE:To enhance the uniformity in molding and vulcanizing a tyre and enhance sealing properties by a method wherein relative rotational motions of a screw threaded shaft and a ball-fitted nut are converted into linear motions so as to move an upper ring vertically. CONSTITUTION:The central mechanism is comprised of a bush 38 connected to the upper ring 18 through a coupling rod 17, the ball-fitted nut 37 (a nut having a plurality of a rollable balls between it and the screw threaded shaft 35) to which the bush 38 is screwed,the screw threaded shaft 35, a key or spline 30 for converting the rotational motions of the shaft 35 into vertical motions of the nut 37, and a hydraulic shock absorber 52 for absorbing the shocks of the shaft 35 and a motor 32. When the threaded shaft 35 is rotated by driving the motor 32, the nut 37 is moved vertically in a cylinder tube 14, whereby the upper ring 18 holding the upper end part of a bladder 11 is moved vertically.