Patent ID: 7195724

Claim:
A method of controlling the feed amount of compounding materials for a compounder-type injection molding machine with a plasticizing unit, an injection unit receiving plasticized material from the plasticizing unit, a first metering unit for supply of a first compounding material to the plasticizing unit, and a second metering unit for supply of a second compounding material to the plasticizing unit, said method comprising the steps of: ascertaining the volume of a mass stream of the compounded plasticized material downstream of the plasticizing unit of the injection molding machine in a continuous manner; and operating at least one of the first and second metering units in response to the continuously ascertained volume to control a composition of the plasticized material, wherein the operating step is implemented to correspond the volume of the mass stream downstream of the injection unit to the volume of compounded material introduced by the respective metering unit into the plasticizing unit, wherein the volume of the mass stream is determined on the basis of at least one of a cycle time and stroke volume of the injection unit.