METHOD AND APPARATUS FOR PRODUCING DOUBLE LAYER PELLET

摘要

PROBLEM TO BE SOLVED: To produce double layer pellets having stable core-shell structure of high quality in good productivity. SOLUTION: A method for producing the pellets P in which a core molding material a is coated with a shell molding material b includes a process (a) in which the material a and the material b are supplied to a die device 3 in which extrusion molding parts are arranged along the circumference, a process (b) in which from the respective extrusion molding parts, the shell material b is applied concentrically on the periphery of the core material, and double layer strands S are extruded, and a process (c) in which the extruded strands S are cut to produce the pellets P.