Patent ID: 8690417

Claim:
A method for intermittent production and continuous supply of a resin-filler mixture in a course of producing plastic molded parts with or without fibers for reinforcement, at least portions of a resin pre-mixed as a first premix and mixed with 1) a filler with fibers, or 2) a filler without fibers in at least one extruder to form the resin-filler mixture, the method comprising the steps of: metering components from storage tanks into a mixing drum in order to produce the first premix, wherein the components are gravimetrically regulated under a primary pressure by metering valves; adjusting and/or controlling an amount of the components metered into the mixing drum, wherein a first weighing device mounted on the mixing drum is configured to weigh the mixing drum to determine a weight of components metered from the storage tanks, and a first control or regulating device connected to the first weighing device is configured to adjust and/or control a metering valve of each storage tank that regulates the amount of the components metered from the storage tank; subsequently or simultaneously mixing the components with a stirring device in the mixing drum to produce the first premix; delivering the first premix intermittently to a metering tank; metering the first premix continuously from the metering tank during the preceding steps to the at least one extruder to produce the resin-filler mixture using a second weighing device mounted on the metering tank, a first feed pump, and a second control or regulating device connected to the second weighing device and configured to adjust and/or control a metering valve of the mixing drum and the first feed pump to gravimetrically or volumetrically control or regulate the amount of the first premix metered from the metering tank; producing a second premix in the mixing drum during the continuous metering of the first premix to the at least one extruder; and delivering the second premix intermittently to the metering tank.