A method for extruding thermomechanical deformable granular material for an additive production process by use of a device which is used in the additive production process and comprising a vertically arranged screw extruder of compact structural type having length/diameter ratio of from 1 to 10, wherein the screw extruder comprising an extruder screw , a filling device and a filling funnel , and the filling device comprising an end facing the extruder screw at which the filling device is connected to the filling funnel , such that the granular material is conveyed from the filling device into the filling funnel , wherein a comminution tool is arranged radially in the filling funnel and in a filling region of the extruder screw , which tool reduces the filling region for the extruder screw in the filling funnel , which tool blocks a movement of the granular material in the circumferential direction and on which tool the granular material is comminuted by rotating the extruder screw , wherein the comminution tool is formed - in the form of a pitch circle section of a cone , - in the form of a vertically extending wall , - in the form of vertically extending ribs or blades, or - in the form of a helical screw rotatable in the opposite direction to the extruder screw on an inner wall of the filling funnel , and wherein the comminution tool comminutes the granular material supplied via the filling device in a mainly dust-like material , so that the settling dust fills, compacts and homogenizes intermediate spaces in the granular material , and in a subsequent shortened compression zone of the device, the compacted and homogenized material is molten and leaves the screw extruder from a shortened discharge zone for subsequent use in the additive production process. wherein the screw extruder comprising an extruder screw , a filling device and a filling funnel , and the filling device comprising an end facing the extruder screw at which the filling device is connected to the filling funnel , such that the granular material is conveyed from the filling device into the filling funnel , wherein a comminution tool is arranged radially in the filling funnel and in a filling region of the extruder screw , which tool reduces the filling region for the extruder screw in the filling funnel , which tool blocks a movement of the granular material in the circumferential direction and on which tool the granular material is comminuted by rotating the extruder screw , wherein the comminution tool is formed - in the form of a pitch circle section of a cone , - in the form of a vertically extending wall , - in the form of vertically extending ribs or blades, or - in the form of a helical screw rotatable in the opposite direction to the extruder screw on an inner wall of the filling funnel , and wherein the comminution tool comminutes the granular material supplied via the filling device in a mainly dust-like material , so that the settling dust fills, compacts and homogenizes intermediate spaces in the granular material , and in a subsequent shortened compression zone of the device, the compacted and homogenized material is molten and leaves the screw extruder from a shortened discharge zone for subsequent use in the additive production process. - in the form of a pitch circle section of a cone , - in the form of a vertically extending wall , - in the form of vertically extending ribs or blades, or - in the form of a helical screw rotatable in the opposite direction to the extruder screw on an inner wall of the filling funnel , <EOS>