Bulk material feeder for the extruder mixing chamber

Abstract

A bulk material feeder having a hopper (1) connected at its end to a hopper sleeve (2), which is connected to the mixer chamber (3), is characterized in that a throttle pin (4) in the form of a truncated cone with an outer surface parallel to the inner surface of the hopper sleeve (1) is slidably mounted in the hopper (1). The throttle pin (4) is connected to a linear drive system (5) operating in a vertical axis, which is connected to a controller (6) of its position mounted in the housing (7). Fill level sensors (8.1, 8.2, 8.3) are mounted in the hopper sleeve (2) and connected via signal cables to the controller (6) of the throttle pin (4) position.