Patent · US Active

Annular die and method for extrusion

US10434696B2 · kind B2 · utility

0Cited by

3References

5Claims

0Family size

Assignee

Kautex Textron GmbH & Co. KG · DE

Inventors

Joachim Eckhardt · Bonn, DE
Thomas Froitzheim · Sankt Augustin, DE
David Schenkel · Bonn, DE

Key dates

Filing date	Jun 21, 2018
Grant date	Oct 8, 2019
Priority date	—
Expiry date	Jun 21, 2038

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2101/12
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to an annular die on an extrusion head for producing tubular or sheet-like preforms with an arcuate die gap and with a melt channel delimited by a mandrel and a die body, the cross-sectional profile of the melt channel being variable by way of adjusting elements, the annular die according to the invention being distinguished by the fact that the outer circumference of the melt channel is at least partially delimited directly by at least one radially adjustable slide, that the slide is formed by a number of segments that can be adjusted together from at least one first position into at least one second position, and that the segments in each position form a respectively closed arc portion of the delimitation of the melt channel, the radius of the arc portion being different according to the position of the segments.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.