Patent ID: 8889052

Claim:
An apparatus for producing defect-critical articles from a molding resin comprising at least 98% clear polymer and additives including a heat stabilizer and a UV blocker in an injection molding machine comprising: an injection molding machine having: a hopper; a resin delivery assembly comprising a hollow cylindrical barrel and a screw rotatably disposed within said barrel and terminating in a nozzle, wherein said resin delivery assembly is made from a powder metallurgy formed into solid non-coated parts having a Chromium-Vanadium (Cr/V) blend over about 20% with no detectable amounts of Nickel (Ni), Tungsten (W) or Sulfur (S); and a mold; and a molding resin fed from said hopper to said resin delivery assembly and being injected via said nozzle into the mold, wherein between said hopper and said mold, the resin only contacts said solid non-coated parts whereby the resin experiences less degradation and provides improved quality for the defect-critical articles.