Advantage of plastic extruder
Plastic extrusion typically takes advantage of plastic extruder or chips, which are melted at high temperature and slowly poured into a mold. While the early version of extrusion developed by Branmah involved forcing the material into the mold by using a plunger, modern plastic extrusion is slightly different. Today, modern plastic extrusion takes advantage of a heated screw feeder which quickly and efficiently forces the plastic pellets from the hopper, through the barrel, and into the die.

Various forms of plastic extrusion exist to accomplish different goals. While there are many different types of extrusion, the main methods include sheet extrusion, tubing extrusion, and coextrusion.

Sheet extrusion (otherwise known as film extrusion) is used for products that are a plastic sheet or film. After the extrusion is created it is cooled by pulling it through sets of cooled calendar rolls. Many times, the technique known as coextrusion is used to add more than one layer on top of the base extruded layer. Coextrusion is simply a process where multiple extruders are used to melt and steadily add different plastics to a compounding extruder. This allows for an extrusion to have a number of specific properties, including for example a softer touch, a gripped surface, matted finish, and much more.