Machine for the production of coiled gaskets

Machine (10) for the production of coiled gaskets from a continuous master backing strip (1a) and a sealing filler strip (1b), which strips are to be spirally wound onto rings, templates or inner rings (11), the machine comprising at least:

• means (2) for feeding the strips (1a, 1b) to be wound,
• a unit (100) for straightening and forming the master backing strip (1a),
• a unit (200) for making incisions in and cutting the master backing strip (1a), arranged downstream of the straightening and forming unit (100),
• a unit (300) for joining together the master backing strip (1a) and filler strip (1b) so as to form a combined strip (1) and for cutting the filler strip (1b),
• a spindle unit (400) arranged downstream of the strip joining unit (300) and able to be rotationally operated by means of a gearmotor (421b) for winding the combined strip (1) until a predefined maximum diameter of the gasket is reached;
• wherein the combined strip (1) when inside the machine (10) has a longitudinal axis, the machine (10) further comprising:
• a device (435) for moving the spindle unit (400) in a direction that is transverse with respect to the longitudinal axis (Y-Y), and
• a unit (500) for rotationally driving one of the templates or one of the inner-rings (11), which rotational driving unit (500) is arranged downstream of the spindle unit (400) and is mounted on the said device (435) for moving the spindle unit (400) in the transverse direction (Y-Y), so as to form gaskets with a diameter greater than the predefined maximum diameter, and
• a unit (600) for welding the master backing strip (1a),
• said units being designed to produce automatically and in sequence a finished one of the gaskets, in accordance with a program managed by means (1000) for programming, controlling and actuating operations of the units.