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Apparatus for manufacturing magnet wire

  • US 4,521,173 A
  • Filed: 09/01/1983
  • Issued: 06/04/1985
  • Est. Priority Date: 04/29/1981
  • Status: Expired due to Fees
First Claim
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1. An apparatus for the manufacture of coated filaments such as magnet wire comprising a die apparatus, a filament pay-out device, a coated filament take-up device, said die apparatus being positioned between said pay-out and take-up devices to receive a moving filament trained from said pay-out device to said take-up device, said die apparatus including an entrance die and exit die and a die block, said die block being between said dies, said entrance die having an entrance opening and an exit opening, said entrance die having a throat portion and a diverging interior wall portion, said throat portion being smaller than said exit opening, said throat portion being larger than said filament, said throat portion being connected to said entrance opening, said throat portion being connected by said diverging interior wall portion to said exit opening, said exit die having an entrance opening and an exit opening, said exit die having a throat portion and a converging interior wall portion, said throat portion being smaller than said entrance opening, said throat portion being larger than said filament, said throat portion being connected to said exit opening, said throat portion being connected by said converging interior wall portion to said entrance opening, said die block having an interior passage communicating with said exit opening of said entrance die and said entrance opening of said exit die, said diverging interior wall portion of said entrance die and said interior passage of said die block and said converging interior wall portion of said exit die defining together a die chamber, said die chamber being fillable with flowable but hardenable material, said flowable material in said die chamber supporting said filament within said die apparatus concentricly of said throat portion of said exit die, a reservoir of said flowable material, operatively connected to said die apparatus for filling said central die chamber with said flowable material, said reservoir maintaining said flowable material within said die chamber at elevated pressures.

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