Machine for manufacturing vulcanized-rubber tubes

Improved machine for manufacturing vulcanized-rubber tubes, comprising a pair of heads arranged oppositely to mandrels which rotate two or more tubular cores supported by supporting elements with fixed rollers on a supporting frame, said tubular cores being flanked by a thermally insulated openable box-like container which is suitable to contain said cores, said cores being wrapped with tubes to be vulcanized and unloaded by transfer means;

• the heads of said container having means for supplying electric power to the cores, and means being provided for removing the cores from said container;
• said machine comprising a carriage which can move along guides which are parallel to said cores, a frame fixed to said carriage, and means provided on said frame for simultaneous wrapping of said cores, said means comprising at least two pairs of supports, one pair for each core, to which th ends of corresponding shafts are rotatably retained, said shafts supporting respective reels which are parallel to said core and on which ribbons of the materials suitable to form the tubes are wound, said ribbons being wrapped around said cores by said means for simultaneous wrapping of said cores, said frame supporting, in a downward region, a pair of parallel bars, a respective tubular element being slideable on each of said bars, lockable by means of a screw, and rigidly coupled to a bar, the ends of cross-members which support guiding means for said ribbons being articulated to the ends of said bar, wherein said frame is constituted by a base from which two wings diverge, each wing supporting two pairs of said reel supports in an upward region and two pairs of said guiding means in a downward region.