Method and extrusion device for extruding fiber-reinforced plastic material for additive manufacturing of components

Abstract

The proposed solution relates to a method and a device for extruding a fiber-reinforced plastic material for the additive production of a component (1), in which the fiber-reinforced plastic material (8) is fed to an extrusion device (2) and heated in a heating zone (43) of the extrusion device (2), the invention relates to a method for producing a component, comprising the following steps:-feeding a fiber-reinforced plastic material (8) into an extrusion device (2) in order to subsequently feed the fiber-reinforced plastic material (8) to an extrusion nozzle (10) of the extrusion device (2), at which a material thread having the fiber-reinforced plastic material (8) for the component to be produced is extruded, and-feeding a screw conveyor (3) of the extrusion device (2) through a heating zone (43), the length-diameter ratio of the spiral conveyor is smaller than 10. In the heating zone (43), a volume of at most 5.5 cm3 is provided for the fiber-reinforced plastic material (8), and the rotational speed of the screw conveyor (3) is limited to at most 30 revolutions per minute.

Description

technical field [0001] The proposed solution relates to an extrusion method and an extrusion device for extruding fiber-reinforced plastic material for additively manufactured components. Background technique [0002] Extrusion devices, for example in the form of screw extruders, are used in particular in the field of mass production of components by means of injection molding and die casting. Here, the auger, injection nozzle and mold are generally level with each other. The filling with the material, which is present mainly in the form of granules or powder, usually takes place here in the rearmost section of the screw extruder, ie in the so-called feed zone. The material is guided vertically directly onto the screw conveyor via a hopper that fits over the pipe section of the extruder. Due to the sufficiently large cross section in the hopper to prevent bridging, the material falls onto the auger driven by gravity and is sucked in by said auger. In the field of mass pro...

AI Technical Summary

Problems solved by technology

However, the latter variant entails the need to dimension the entire 3D printed device as significantly oversized

Furthermore, in the extrusion methods known hitherto for additive manufacturing it can generally be observed that when processing fiber-reinforced plastic materials with them, the desired or even required material strength of the component to be produced can only be difficult or impossible to achieve

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