Patent ID: 7648358

Claim:
A plastic pellet forming apparatus comprising: means for extruding of a molten plastic for melting and extruding a plastic material for forming a pellet; a die for introducing the molten plastic extruded from the means for extruding to a strand forming path, forming a strand, and extruding the strand from a lower end of the strand forming path in a vertical lower direction; a cylindrical guide assembly providing means for cooling of the strand as the strand is vertically extruded below the lower end of the strand forming path of the die for introducing the strand extruded from the die from an upper end opening portion of a cylindrical guide, passing the strand through an inner side of the cylindrical guide member, thereafter, and discharging the strand from a lower end opening portion of the cylindrical guide; and a cutter for cutting the strand discharged from the lower end opening portion of the cylindrical guide successively at a uniformly constant length, wherein the means for cooling of the strand includes a source of a refrigerant for air cooling from the upper end opening portion of the cylindrical guide through an inner side of the cylindrical guide without permitting an escaping of the refrigerant into outside air, by circulating the refrigerant to surrounding the strand passing through the inner side of the cylindrical guide and discharging the refrigerant from the lower end opening portion of the cylindrical guide to a position outside of the cylindrical guide.