Extruder-calender combination

US5122049A · kind A · utility

Assignee

• Paul Troester Maschinenfabrik · DE

Inventor

• Wilfried Baumgarten · Pattensen, DE

Key dates

• Filing date: Nov 5, 1991
• Grant date: Jun 16, 1992
• Expiry date: Nov 5, 2011

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C48/07
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

An extruder has a screw rotatable in a housing and an extrusion head having an upper part bolted to the housing and a lower part hingedly connected to the housing for movement between a closed operative position and an open position. The upper part of the extrusion head is located above the screw so that the screw can be removed from the housing when the lower extrusion head part is swung to open position and without removing the upper extrusion head part from the housing. The two extrusion head parts define between them a flow passage directed toward the upper roller of a calender. A movable lip on the lower extrusion head part faces, and is spaced from, the upper calender roller to define a variable gap through which extruded material must pass before reaching the narrowest part of the gap between the calender rollers. The lip is either pivoted at an upper edge or is slidable toward and away from the upper calender roller to vary the width of the gap formed between the lip and the upper calender roller.