Method and apparatus for injection molding multi-component mixtures

US7229584B2 · kind B2 · utility

Assignee

• Demag Ergotech GmbH · DE

Inventors

• Helmut Brix · Wohlmirstedt, DE
• Gerhard Rapp · Freiberg am Neckar, DE

Key dates

• Filing date: Sep 13, 2002
• Grant date: Jun 12, 2007
• Expiry date: Oct 15, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2083/005
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

In a method and apparatus for injection molding a multi-component mixture, in particular liquid silicone rubber; a starting material, containing at least two components and, optionally, at least one additive, is conveyed from a storage and metering assembly through a mixer for mixing the starting material, to a reservoir at an amount which is a multiple of an amount required for an injection molding cycle. The mixed starting material is transferred in increments from the reservoir to an injection unit of an injection molding machine. When the reservoir is emptied to a predetermined level a multiple of the amount of starting material required for the injection molding cycle is fed to the reservoir.