Eco-friendly buoy
An eco-friendly buoy includes a foam including a cylindrical accommodation space in the interior of the foam, and coupling grooves at predetermined intervals at an outer surface circumference of the foam in order to fasten the foam to fixing members through wire; and a protective layer formed on an entire outer surface of the foam and protecting the foam from damage by waves or wind. The eco-friendly buoy is manufactured from eco-friendly expanded polypropylene and expanded styrene and has a protective layer on an outer surface thereof, thereby being protected from damage by waves or wind. In addition, the eco-friendly buoy may be used for a long time, thus reducing maintenance costs.
1. A method of manufacturing an eco-friendly buoy, the method comprising:
foam formation of forming foams by supplying expanded polypropylene or foamed polyethylene to interiors of molds forming a semicylindrical shape and then supplying heat from a heater to the molds;
foam cooling of cooling the foams formed in the molds by cooling the molds;
protective layer formation of forming protective layers melting outer surfaces of the foams through supplying of heat from the heater to the molds comprising the foams, wherein the molds are rotated and the heaters supply heat to the molds at a predetermined section to sequentially form protective layers at the outer surfaces of the foams;
protective layer and foam formation of forming the protective layers and the foams by cooling the molds wherein the foams comprise a cylindrical accommodation space in an interior of the foams, coupling grooves at predetermined intervals at an outer surface circumference of the foams in order to fasten the foams with fixing members through wires, and the protective layer formed on an entire outer surface of the foams and protecting the foams from damage by waves or wind;
inner support member insertion of inserting inner support members made of expanded polystyrene into accommodation spaces of the foams; and
assembly of fixing through thermosetting after adhering connection parts of a pair of the foams and a pair of protective layers formed in a semicylindrical shape.