The device for reversing rubber chains, as created, comprises a steel chassis (3) on which running ways (4) are mounted for moving a tensioning car (6). In parallel to the running ways (4), gear racks (5) are mounted, the drive of the tensioning car (6) being carried out by two hydraulic motors (9) by means of gears (10) meshed with the gear racks (5). At the left end of the steel chassis (3) a support (2) is fixedly mounted, and at its right end and on the tensioning car (6) a second support (2) is mounted. On the supports (2) and on the tensioning car (6) movable forks (1) are mounted, each movable fork (1) being fixed to a second gear (12) mounted on a shaft (18) bearing in bearing bodies (21) and on which second gear (12) is fixed a bracket (14) to which a balance weight (13) is mounted. Each movable fork (1) comprises a fixed arm (15), a movable arm (16) and a locking arm (17), the rotation of the movable forks (1) being carried out by two other hydraulic motors (23) by means of third gears (11) mounted on the shafts of the other hydraulic motors (23) and meshed with the second gears (12) mounted on the shafts (18) of the movable forks (1).
The formed fixture to a rubber chain retreading press includes a steel chassis (2) on which running ways (4) for moving a tensioning car (5) are mounted, wherein two gear racks (3), part of the drive of the tensioning car (5), are mounted on the steel chassis (2) parallel to the running ways (4). On the tensioning car (5) is mounted a tensioning drum (1) mounted on a shaft (24) bearing by bearing bodies on a stationary stand (7) and an hinged stand (9). The tensioning drum (1) is capable of being tilted by means of a hydraulic cylinder (22), and at each end of the tensioning drum (1) it is possible to mount movable separable stops (21 and 31), and in the middle of the tensioning drum (1) a power belt (27) is fixed, with towing ropes (28) attached and clamps (29) clamped thereto. On either side of the press body beams (14) are located to which lower fixed roller ways (10) and upper movable roller ways (6) are mounted by means of braces.
B29C 73/30 - Appareils ou accessoires non prévus ailleurs pour presser localement ou pour chauffer localement
B29C 73/04 - Réparation d'articles faits de matières plastiques ou de substances à l'état plastique, p. ex. d'objets façonnés ou fabriqués par utilisation de techniques couvertes par la présente sous-classe ou la sous-classe utilisant des éléments préformés
B29D 29/00 - Fabrication de courroies ou de bandes
B29C 43/34 - Alimentation en matière à mouler des moules ou des moyens de pressage
B29C 43/18 - Moulage par pressage, c.-à-d. en appliquant une pression externe pour faire couler la matière à moulerAppareils à cet effet pour la fabrication d'objets de longueur définie, c.-à-d. d'objets séparés en incorporant des parties ou des couches préformées, p. ex. moulage par pressage autour d'inserts ou sur des objets à recouvrir
B29C 43/36 - Moules pour la fabrication d'objets de longueur définie, c.-à-d. d'objets séparés
B29C 31/04 - Alimentation, p. ex. chargement d'une cavité de moulage
B29K 21/00 - Utilisation de caoutchouc non spécifié ou élastomères non spécifiés comme matière de moulage
B29K 105/08 - Présentation, forme ou état de la matière moulée contenant des agents de renforcement, charges ou inserts de grande longueur, p. ex. ficelles, mèches, mats, tissus ou fils
The present invention relates to a method for retreading tires for heavy-duty vehicles, which will find application in the transport industry and in particular in retreading the tires of various types of vehicles. The created method, in addition to the operations of the known methods of retreading, includes an operation that solves the main problem, namely: removal of residual air between the diaphragm and the tire by placing a textile tape between them. The textile strips remain between the diaphragm and the tire during its firing and thus all the air is removed due to the temperature expansions. This ensures that the diaphragm is constantly pressed over its entire surface against the inside of the tire. In addition, the problem of poor compression and adhesion of the applied patches is overcome and they are vulcanized over their entire area. When the air, which expands when heated, is removed, then it does not damage the carcass and thus it remains serviceable.
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