Extrusion is the process of forcing a raw material through a die under extreme pressure to get the desired shape. Manufacturers of extrusion products can produce various profiles using the same extrusion machine. Commonly extruded materials include aluminum, copper, plastic and even ceramic. Extrusion products have applications in various industries, including automotive, food processing and construction.
If you want to use extrusion machines for your applications, you will need to be conversant with the technical terms of extrusion machines. This guide intends to familiarize you with the key terms for extrusion machines, such as extrusion die, extruder barrels, extrusion speed and screw and ram extruders.
Extrusion diesAn extrusion die, an integral part of an extrusion machine, has one or more machined openings to produce the desired extruded parts or sections.
Extruder barrelsAn extruder barrel is the portion of the extruder (extrusion machine) that surrounds the screw or plunger.
Screw extrudersA screw extruder forces the material out through the barrel and die, using a screw mechanism.
Ram extrudersA ram extruder moves the raw material through a barrel and die, using a plunger (commonly known as a ram) rather than the usual screw mechanism.
PurgingPurging is the process of cleaning one type of material or color from an extruder by forcing it out with a new material or color.
purging at Xaloy Inc. (PDF), a supplier of industrial machinery components for the plastics industry.