Patent · US Expired

Process for producing dish-shaped moldings of thermoplastic material

US7175791B2 · kind B2 · utility

6Cited by

5References

11Claims

0Family size

Assignee

KAUTEX MASCHINENBAU GMBH · DE

Inventors

Michael Pappert · Eitorf, DE
Alfred Jira · Rübhausen, DE
Andreas Hollweg · Hennef (Sieg), DE
Wolfgang Kummer · Goslar, DE
Peter Klusener · Bonn, DE

Key dates

Filing date	Feb 10, 2003
Grant date	Feb 13, 2007
Priority date	—
Expiry date	Oct 20, 2023

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2995/0082
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A process for the production of dish-shaped moldings or hollow bodies of thermoplastic material comprises the step of producing an at least approximately tubular preform by the extrusion of thermoplastic material. The preform is axially divided to form at least one single-layer web of material which is removed from the extrusion head by being engaged by means of a manipulator which spreads and/or straightens the web transversely with respect to the extrusion direction. The web is then transferred to a molding tool by a manipulator for it to be put into its final form in its first heat in the molding tool.

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