Abstract: Enamelled wire is produced using almost solvent-free fusible resins. Molten resin is pumped from a supply reservoir against the direction of movement of the wire with part of the resin coating the wire. The raw wire is preheated to a temperature near the melting temperature of the molten resin. Excess resin is returned to the supply reservoir after the resin coating the wire has been calibrated to a predetermined circumferential dimension. The resin coating the wire is then hardened. The coating apparatus includes a raw wire guide, a demineralized water bath, an annealing furnace having a protective steam atmostphere, a cooling water bath, a wire preheater, an enameling stove, a heated resin reservoir, a resin applicator and a winding-on machine. The resin coating is applied under closed system conditions, thereby substantially reducing emissions.

Abstract: A plant for producing enameled wire using an inline process has, placed in order a wire pay-off system, a wire drawer, an annealer, an enameled dope coater, an enamel processing unit and an enameled wire take-up unit. The annealer and the dope coater are placed together in a single oven housing, which has a drying space, a curing space and a return shaft in which a circulating air blower, a heating unit and a catalyst are placed. The blower is responsible for producing a heated air current moving through the heating unit of the annealer and through the catalyst, the air current furthermore moving in the opposite direction to the direction of the wire through the curing space and the drying space. The wire makes its way through an annealing tube and the return shaft into waste gas pipe joined therewith and through a wire cooler, which is full of inert atmosphere as produced by a unit.