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 - Apparatus or accessories not otherwise provided for for local pressing or local heating
B29C 73/04 - Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass using preformed elements
B29C 43/34 - Feeding the material to the mould or the compression means
B29C 43/18 - Compression moulding, i.e. applying external pressure to flow the moulding materialApparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
B29C 43/36 - Moulds for making articles of definite length, i.e. discrete articles
B29K 21/00 - Use of unspecified rubbers as moulding material
B29K 105/08 - Condition, form or state of moulded material containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
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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