Spiral die assembly

Details Spiral die assembly Spiral die assembly

2006-11-07

2006-11-07

Del Sole, Joseph S. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

With means lubricating cooperating apparatus parts

C425S215000, C425S380000, C425S381200, C425S382300, C425S466000, C425S467000

Reexamination Certificate

active

07131829

ABSTRACT:
A spiral die assembly can obtain a homogeneous pipe body, an inflation film with/without drawing and a functional film by dispersing molten resin homogeneously, and the spiral die assembly is capable of being applied to various molten resins and extruding conditions. The spiral die assembly comprises a main body1of said spiral die assembly, a mandrel2having a spiral groove3around its outer surface inserted on the inside of the main body and a rotatable ring5having a desired width fitted along the outer surface of the spiral groove3and fitted in a portion of a die cylinder which forms the inner surface of the main body1in a range corresponding to both ends of the spiral groove3.

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