Starting-valve throttle device for delivering a melt from a screw extruder, and system for preparing bulk material having a starting-valve throttle device of this type, and method for delivering a melt from a screw extruder by means of a starting-valve throttle device of this type

US11273590B2 · kind B2 · utility

Assignee

• COPERION GMBH · DE

Inventors

• Michael Schmid · Zell am Harmersbach, DE
• Stephan Kiern · Landshut, DE
• Ralf Kühn · Freising, DE
• Markus Schmudde · Murr, DE
• Tomi TRATNIK · Ludwigsburg, DE

Key dates

• Filing date: Mar 25, 2019
• Grant date: Mar 15, 2022
• Expiry date: Dec 3, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C2948/92895
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A starting-valve throttle device has a housing having a housing recess which is configured therein and in which a switching member is repositionable between an evacuation position and a delivery position. The switching member in the evacuation position configures an evacuation duct which connects an entry duct to an evacuation opening. The switching member in the delivery position configures a passage duct which connects the entry duct to a delivery duct. A throttle member is disposed in the passage duct so as to be repositionable relative to the switching member. On account thereof, a melt flowing through the passage duct is capable of being throttled in a desired manner. The starting-valve throttle device is constructed so as to be simple, compact and reliable. The operation of the starting-valve throttle device and an associated screw extruder is simple and energy-efficient.