Faygo Plast

In twin screw extruder apparatus including a rotating screw in a cylinder forming a channel receiving solid material and eventually expressing it through a die, the channel comprising a feed zone, a melting and compression zone and a melt pumping zone, the improvement wherein a solids decompression zone is between the feed and the melting and compression zones which has increased unit volume relative to that of the feed zone, with the channel of the melting and compression zone communicating with the feed inlet through the decompression and feed zones such that solids are initially metered producing a starved condition so as to melt at substantially atmospheric pressure without filling the channel of the melting and compression zone until close to its end.
The plastic extrusion process starts with what are called thermoplastic resins. Thermoplastic resins are a type of plastic which can be melted, processed, and then re-melted to be used again. These resins are generally delivered in a pellet or bead form to be used in the screw extruder.
The pellets or beads can come in several different forms. There are plastic resin beads, which come in what is referred to as a virgin form. These are beads which have never been processed before and generally come with certifications of purity. The beads are also available in grades of quality that can be purchased for specific uses. Waste plastic from the extrusion process can be reprocessed into beads that may be used again, which reduces the overall waste generated in the process.