Apparatus of shrinking volumes of waste foamed plastics

Claim 1

Apparatus for treating materials comprising foamed thermoplastic synthetic resins, said apparatus comprising a main body frame having a crushing room inwardly tapered towards its lower part; a hopper in communication with said crushing room and into which said materials are charged; a crushing shaft rotatably traversing said crushing room, said crushing shaft comprising a plurality of crushing vanes for crushing said materials and having a radius of gyration sufficient to extend into said hopper so as to destroy the lower layer of said materials within said hopper; a sending cylinder disposed in said main body frame outside of said crushing room, said sending cylinder having receipt opening means in communication with said crushing room for receiving said materials from said crushing room; said sending cylinder housing a rotatable shaft having a screw vane for moving said materials along its axial length; a compressing cylinder through which said rotatable shaft is partially disposed, said compression cylinder having an inlet and an outlet, said inlet being in communication with and connected in series to said sending cylinder; the diameter of said inlet being larger than the diameter of said outlet so that said compressing cylinder is tapered; a heating cylinder for heating said materials to a temperature lower than the temperature at which said materials completely melt, so as to soften and fuse said materials one to another, said heating cylinder having an inlet and an outlet, said inlet being in communication with said outlet of said compressing cylinder; extruding nozzle means in communication with said outlet of said heating cylinder for extruding said materials in an elastic state; rotating cutting means disposed about said extruding nozzle means for cutting said extruded materials; and exhausting means comprising receiving means for receiving the cut materials and gas flow means for exhausting said materials out of said apparatus.