Extrusion and Injection
 There are two steps in extrusion-injection process. Step one is “extrusion”: mixing the thermoplastic resin with glass fiber in an extruder, thus forming reinforced thermoplastic pellets. Step two is “injection”: converting the reinforced thermoplastic pellets into different parts using an injection molding machine. The advantages of the extrusion compounding process lie in its low cost conversion, due to high efficiency screw design, and versatile formulation possibilities.