Device for coating a conductor wire
View Patent ↗The invention provides a device for coating a conductor wire, the device comprising an enameling oven, the oven comprising a chamber through which the wire coated in an enameling varnish passes, and being provided for this purpose with a wire inlet and a wire outlet, and with means for heating the wire along its path within the chamber in order to evaporate solvent from the varnish and bake the varnish on the wire, the atmosphere inside the chamber having low oxygen content, the chamber further comprising a fan and an air feed inlet communicating with the chamber and servo-controlled to means for measuring the oxygen content. In the device, the fan and the air feed inlet are situated in distinct positions that are spaced apart from each other, the fan being situated between the solvent evaporation zone and the air feed inlet in such a manner as to entrain the solvent towards the air feed inlet so that the solvent is treated by combustion outside the zone in which the varnish is baked.
1. A device for coating a conductor wire, the device comprising:
an enameling oven, said oven having a chamber through which said wire, coated in an enameling varnish, passes, and being provided for this purpose with a wire inlet and a wire outlet, and with means for heating said wire along its path within said chamber in order to evaporate solvent from said varnish and bake said varnish on said wire, the atmosphere inside said chamber having low oxygen content, said chamber further maintaining a fan and an air feed inlet communicating with said chamber and servo-controlled to means for measuring said oxygen content,
wherein said fan and said air feed inlet are situated in distinct positions that are spaced apart from each other, said fan being situated between the solvent evaporation zone and said air feed inlet in such a manner as to entrain said solvent towards said air feed inlet so that said solvent is treated by combustion outside the zone in which said varnish is baked; and
said device having an air feed duct inside said oven, communicating at its two ends with said chamber, and also with said air feed inlet, so as to form a closed gas circulating circuit, said circuit comprising said varnish baking zone, said solvent evaporation zone, and said solvent combustion zone, the gas circulating around said circuit in the opposite direction to the travel direction of said wire inside said chamber.
2. A device according to claim 1 , wherein the treatment of said solvent by combustion takes place in a “combustion” zone for burning said solvents and communicating with said chamber.
3. A device according to claim 1 , wherein said fan is situated in front of said air feed inlet relative to the flow direction of said solvent.