Apparatus and method for extruding thermo-mechanically deformable material in bulk form and compact screw extruder

摘要

PROBLEM TO BE SOLVED: To provide a method and an apparatus for extruding a dense and continuous material strand which is thermomechanically deformable. SOLUTION: A material supply part of a screw extruder having a length / diameter ratio significantly smaller than an apparatus configuration known in the field of injection molding is adopted, and a funnel-shaped screw extruder is arranged vertically. It is characterized by using a crusher arranged in the introduction region of. This grinder prevents the material from rotating in the funnel, resulting in movement of the screw extruder in the transport direction along with the pitch of the screw flanks. Also, the crushing of the coarse material portion increases the bulk density in the screw region and reduces the amount of air that needs to be extruded from the material in the areas of the plasticization and homogenization zones, which serves the above objectives. Achieved. [Selection diagram] Fig. 1