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For the process that creates volcanic rock, see extrusive (geology).

Extruded aluminium; slots allow bars to be joined with special connectors.

Extrusion of a round blank through a die.

Extrusion is a manufacturing process used to create long objects of a fixed cross-sectional profile. A material, often in the form of a billet, is pushed and/or drawn through a die of the desired profile shape. Hollow sections are usually extruded by placing a pin or piercing mandrel inside of the die, and in some cases positive pressure is applied to the internal cavities through the pin. Extrusion may be continuous (producing indefinitely long material) or semi-continuous (producing many short pieces). Some materials are hot drawn while others may be cold drawn. Image File history File links Question_book-3. ... Extrusive refers to a mode of igneous rock formation, in which hot magma from inside the Earth flows out (extrudes) onto the surface. ... Image File history File links Metadata Size of this preview: 800 × 347 pixelsFull resolution (1992 × 864 pixel, file size: 339 KB, MIME type: image/jpeg) Other versions None. ... Image File history File links Metadata Size of this preview: 800 × 347 pixelsFull resolution (1992 × 864 pixel, file size: 339 KB, MIME type: image/jpeg) Other versions None. ... Image File history File links Extrusion. ... For other uses of this term, see Die. ... Manufacturing (from Latin manu factura, making by hand) is the use of tools and labor to make things for use or sale. ... Billet is a term used in manufacturing to refer to a cast product. ... For other uses of this term, see Die. ... Cold drawing is a process, for example used in cable core production. ...

The feedstock may be forced through the die by various methods. A single or twin screw auger, powered by an electric motor, or a ram, driven by hydraulic pressure (for steel alloys and titanium alloys for example), oil pressure (for aluminum), or in other specialized processes such as rollers inside a perforated drum for the production of many simultaneous streams of material.

Extrusion simulation tools help to understand the extrusion process and to optimize development of tools and products.

Extrusion is also the first step in the process of extrusion and spheronization, a commonly used process in the pharmaceutical industry.

Commonly extruded materials include metals, polymers, ceramics, and foodstuffs. This article is about metallic materials. ... A polymer (from Greek: πολυ, polu, many; and μέρος, meros, part) is a substance composed of molecules with large molecular mass composed of repeating structural units, or monomers, connected by covalent chemical bonds. ... This article is about ceramic materials. ...

Metal

Metal extrusion is used by industry for various purposes such as:

• Copper pipe for plumbing
• Aluminium extrusion profiles for tracks, frames, rails, mullions, and extrusion-type heat sinking devices
• Steel rods or track
• Titanium aircraft components including seat tracks, engine rings, and other structural parts

Steel and titanium extrusions use glass powder as a lubricant. Invented in France in 1935 by Mr. Séjournet, this process was patented throughout the world and helped launch industrial steel extrusion, and was later applied to titanium where it was more effective.^{[citation needed]} For other uses, see Copper (disambiguation). ... A plumber wrench for working on pipes and fittings A complex arrangement of rigid steel piping, stop valves regulate flow to various parts of the building. ... Aluminum redirects here. ... Look up profile in Wiktionary, the free dictionary. ... Mullion, Cornwall is also the name of a village in Cornwall off the Lizard. ... A large copper heatsink. ... For other uses, see Steel (disambiguation). ... General Name, symbol, number titanium, Ti, 22 Chemical series transition metals Group, period, block 4, 4, d Appearance silvery metallic Standard atomic weight 47. ... Flying machine redirects here. ...

Plastic

Sectional view of a plastic extruder showing the components

Plastic extrusion commonly uses plastic chips or pellets, which are usually dried in a hopper before going to the feed screw. The polymer resin is heated to molten state by a combination of heating elements and shear heating from the extrusion screw. The screw forces the resin through a die, forming the resin into the desired shape. The extrudate is cooled and solidified as it is pulled through the die or water tank. In some cases (such as fibre-reinforced tubes) the extrudate is pulled through a very long die, in a process called pultrusion. Image File history File linksMetadata Download high resolution version (1024x572, 71 KB) Summary Plastic extruder cut in half and labeled. ... Image File history File linksMetadata Download high resolution version (1024x572, 71 KB) Summary Plastic extruder cut in half and labeled. ... Plastic extruder with barrel cut open to show the screw Plastics extrusion is a high volume manufacturing process in which raw plastic material is melted and formed into a continuous profile. ...

A multitude of polymers are used in the production of plastic tubing,[1] pipes, rods, rails, seals, and sheets or films.[2]

Ceramic

Green Play-Doh with can and accessory extruder toy

Ceramic can also be formed into shapes via extrusion. Terracotta extrusion is used to produce pipes. Many modern bricks are also manufactured using a brick extrusion process.[3] Some Play-Doh toy products also make use of extrusion. Play-Doh is a modeling compound with similar physical properties to clay, but it is not actually ceramic. Image File history File links Green Playdoh with can and accessory toy. ... Image File history File links Green Playdoh with can and accessory toy. ... Terra cotta is a hard semifired waterproof ceramic clay used in pottery and building construction. ... Green Play-Doh with can and accessory toy Play-Doh is a commercial plastic modeling compound similar in texture to bread dough that has been sold as a childrens toy around the world for a half century. ...

Food

Please help improve this article or section by expanding it. Further information might be found on the talk page or at requests for expansion. (January 2008)

Extrusion has found great application in food processing. Products such as pastas, breakfast cereals, Fig Newtons, prefab cookie dough, Sevai, Idiappam,jalebi and ready-to-eat snacks are now manufactured by extrusion. Softer foods such as meringue have long been "piped" using pastry bags. Extrusion is also used with grains such as wheat, corn, and rice. In feed industry it is used for process with floating and slow sinking feed. Image File history File links This is a lossless scalable vector image. ... Percentages are relative to US recommendations for adults. ... This article does not cite any references or sources. ... A plastic tray of Fig Newtons The Fig Newton (in Europe, a Fig Roll) is a soft, cake-like pastry filled with fig jam. ... Cookie dough refers to a blend of cookie ingredients which has been mixed into a solid yet malleable form but has not yet been hardened by heat. ... Sevai is a type of rice noodles popular in Southern India, particularly Tamil Nadu. ... Idiyappam (Rice Noodles), also known as Stringhoppers, are a light south Indian food, usually served for breakfast in Kerala. ... This article does not cite any references or sources. ... Lemon meringue muffins For the Dominican folk dance and the music it is performed to, see merengue. ... A pastry bag is used to pipe semi-solid foods by pressing them through a narrow opening at one end, for many purposes including cake decoration. ... The word grain has several meanings, most being descriptive of a small piece or particle. ...

Catalysis

Extrusion is also a very important unit operation in shaping a catalyst. The shape of a catalyst is directly related to its working conditions. A high specific surface can be obtained by extrusion. It has been suggested that this article or section be merged into Catalysis. ...

Road marking compound

"Painted" road markings are often done with extruded two- or three-component compounds. Thermoplastics are also common. This is a low-pressure, high-flow process with very good contour and thickness control. Extrusion has more or less completely replaced the older "sliding mold" method. Benefits are much better economy, higher speed, and general appearance. For other uses, see Plastic (disambiguation). ...

See also

• Plastics extrusion
• Injection moulding
• Hydrostatic extrusion
• Equal channel angular extrusion
• Impact extrusion

Plastic extruder with barrel cut open to show the screw Plastics extrusion is a high volume manufacturing process in which raw plastic material is melted and formed into a continuous profile. ... Injection moulding is a manufacturing technique for making parts from thermoplastic material in production. ... Hydrostatic extrusion is the process by which a billet of material, usually a metal is formed into an extrudate of smaller cross-sectional area. ... The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ...

References

External links

• eFunda Engineering Fundamentals - Extrusion

v • d • e Metal forming
Metal forming	Coin die · Coining · Cold rolling · Die · Drawing · Electromagnetic forming · Flypress · Hot rolling · Hydraulic press · Hydroforming · Machine press · Progressive stamping · Progressive die · Punching · Punch press · Rolling · Shear · Sinking · Stamping press · Metal spinning · Swage Image File history File links Blacksmith-hammer-anvil-50x50. ... A coin die is one of the two metallic pieces that are used to strike one side of a coin. ... Coining is a form of precision stamping. ... Rolling mill for cold rolling metal sheet like this piece of brass sheet. ... For other uses of this term, see Die. ... Drawing is a manufacturing process for producing a wire, bar or tube by pulling on a material until it increases in length. ... A pinched aluminium can, produced from a pulsed magnetic field created by rapidly discharging 2 kilojoules from a high voltage capacitor bank into a 3-turn coil of heavy gauge wire. ... A Flypress is a metalworking machine tool used to punch holes in sheet metal in one operation, rather than by cutting the hole or drilling, etc. ... Hot rolling is a metallurgical process in which the metal is passed through a pair of rolls and the temperature of the metal is above its recrystallization temperature, as opposed to cold rolling, which takes place below it. ... Hydraulic force increase. ... Hydroforming (or hydramolding) is a cost-effective way of shaping malleable metals such as aluminum into lightweight, structurally stiff and strong pieces. ... Power press with a fixed barrier guard A press, or a machine press is a tool used to work metal (typically steel) by changing its shape and internal structure. ... Progressive (punch and blanking) die with strip and punchings Progressive stamping is a metalworking method that can encompass punching, coining, bending and several other ways of modifying metal raw material, combined with an automatic feeding system. ... Progressive die with strip and punchings A progressive stamping die (die) is a metalworking device that is designed and built to convert a strip of metal raw material into parts that to conform blueprint specifications. ... Metals Punching in metal fabrication is the process of using a machine to press a shape through a sheet of metal and into a die to create that shape in the metal. ... A Punch Press is a machine that has a set of punches and dies, a male (punch) and female (die), which when pressed together put a hole into the material used that is the same geometry as the punch that is being used. ... profile rolling (to manufacture a cone) Rolling is a fabricating process in which the metal, plastic, paper, glass, etc. ... A guillotine is a machine used to accurately cut sheet metal. ... Location within China Changchun (Simplified Chinese: 长春; Traditional Chinese: 長春; pinyin: ; Wade-Giles: Chang-chun) is the capital of the Jilin province in northeastern China. ... A stamping press (press) is a manufacturing device that is designed and built to operate progressive stamping dies and other types of dies. ... Metal Spinning is a process by which circles of metal are shaped over mandrels (also called forms) while mounted on a spinning lathe by the application of levered force with various tools. ... Swaging is a metal forming technique in which the metal is plastically deformed to its final shape using high pressures. ...
Metalworking topics	Casting · CNC · Cutting tools · Drilling and threading · Fabrication · Forging · Grinding · Jewellery · Lathe · Machining · Machine tooling · Measuring · Metalworking · Hand tools · Metallurgy · Milling · Occupations · Press tools · Pipe and tube bending · Smithing · Turning · General terminology · Welding Turned chess pieces Metalworking is the craft and practice of working with metals to create structures or machine parts. ... This article is about the manufacturing process. ... For other uses, see CNC (disambiguation). ... a Cutting Tool, in the context of Metalworking is any tool that is used to remove metal from the workpiece by means of shear deformation. ... Drilling is the process of using a drill bit in a drill to produce holes. ... A typical steel fabrication shop Fabrication, when used as an industrial term, applies to the building of machines , structures, process equipment for chemical, fertilizer sector by cutting, shaping and assembling components made from raw materials. ... This article is about smithing. ... Rotating abrasive wheel on a bench grinder. ... For the Korean music group, see Jewelry (group). ... Center lathe with DRO and chuck guard. ... A lathe is a common tool used in machining. ... A machine tool is a powered mechanical device, typically used to fabricate metal components of machines by the selective removal of metal. ... The examples and perspective in this article or section may not represent a worldwide view. ... Turned chess pieces Metalworking is the craft and practice of working with metals to create structures or machine parts. ... Metalworking hand tools are hand tools that are used in the metalworking field. ... Georg Agricola, author of De re metallica, an important early book on metal extraction Metallurgy is a domain of materials science that studies the physical and chemical behavior of metallic elements, their intermetallic compounds, and their compounds, which are called alloys. ... Endmills for a milling machine. ... It has been suggested that this article or section be merged with Smith (metalwork). ... Power press with a fixed barrier guard A press, or a machine press is a tool used to work metal (typically steel) by changing its shape and internal structure. ... A smith, or metalsmith, is a person involved in the shaping of metal objects. ... Turning, CNC turning, or manual turning is the process used to produce cylindrical components in a lathe. ... This article needs to be wikified. ... Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. ...