Process for baking wire-like products clad in insulating plastic

Details Process for baking wire-like products clad in insulating plastic Process for baking wire-like products clad in insulating plastic

1991-08-29

1994-03-08

Beck, Shrive

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34 79, 34156, 432 8, 432 59, 432 72, 427120, 427318, 427378, C23C 2600

Patent

active

052916707

ABSTRACT:
A process for baking electrically conductive wires clad in insulating plastics resin, comprising a first, evaporation stage for evaporation of solvents and a second resin polymerization and cross-linking stage, which are performed respectively in a first and in a second region of a tunnel chamber in a continuous oven between the inlet regions and outlet regions of which the wires advance, a third stage comprising aspiration from the oven of a mixture of air and solvents formed during the first evaporation stage, and a fourth stage comprising heating this mixture to a predetermined temperature such as to cause combustion of the solvents, and including a fifth stage of introducing heat energy to these regions of the oven from at least part of the stream of air and combustion products coming from the fourth stage, through heat exchangers disposed on the outer surface of this tunnel chamber, in such a way as significantly to reduce the introduction of heat energy provided to the chamber by heating means supplied externally of the oven.

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