Apparatus for manufacturing a resin tube with multiple inner conduits

摘要

The invention relates to a resin tube that is inevitably buried during engineering works for electrical and communication line facility. The apparatus for extruding a raw material injected via a hopper (12) through a dice consisting of inner and outer blocks to produce a resin tube comprises a first extruding unit (10) having a plurality of first dice (18) for shaping at least one inner conduit (1) installed within a circumference of a given width at a head (16) of a screw case (14); first refrigerator (20) consecutively installed in the first extruding unit, for cooling the inner conduit from the first extruding unit; a second extruding unit (30) consecutively installed next to the first refrigerator in the head (36) of the screw case (34), said second extruding unit having a containing tube for containing the plurality of the inner conduits extruded from the first extruding unit and a second dice (38) for shaping outer conduits (2) surrounding an outer circumference of the inner conduits; and a second refrigerator (40) next to the second extruding unit, said second refrigerator having a third dice (44) for shaping a wrinkle at the main wall of the outer conduits extruded through the second dice and said second refrigerator for cooling the outer conduits extruded through the second and third dice.