to thrust out; force or press out; expel: to extrude molten rock. to form (metal, plastic, etc.) with a desired cross section by forcing it through a die. verb (used without object), ex·trud·ed, ex·trud·ing. … to be extruded: This metal extrudes easily.
What is an example of an extrusion?
Everyday examples of extrusion can be seen when toothpaste is squeezed out of a tube, icing is pushed out of an icing bag and “Playdo” shapes are made. Extrusion moulding of plastics is used to make any long shape that has a constant cross section. … Perhaps most common plastic extruded is PVC.
Is extrusion a noun?
extrusion noun – Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner’s Dictionary at OxfordLearnersDictionaries.com.
What is an extruded tooth?
An extrusion is defined as a displacement of a tooth out of its socket. This can make the tooth appear to be elongated, and it can wiggle excessively as a result. The tooth can be very sensitive, and often, the extrusion can cause intense pain.
Where is extrusion used?
Extrusion is widely used in production of tubes and hollow pipes. Aluminum extrusion is used in structure work in many industries. This process is used to produce frames, doors, window etc.
What is extruding line?
A sheet extrusion line consists of an Extruder (single or twin screw), equipped with a Screen Changer and a Gear Pump, followed by a Static Mixer (sometimes feeding a Coextrusion Feedblock that is preceded by one or more additional extruders sets as described above), feeding a flat sheet die.
What is extrusion used to make?
Extrusion is a process used to create objects of a fixed cross-sectional profile by pushing material through a die of the desired cross-section. … Commonly extruded materials include metals, polymers, ceramics, concrete, modelling clay, and foodstuffs. Products of extrusion are generally called extrudates.
How is metal extruded?
Metal extrusion is a forming process in which we force a metal (either hot or cold) through a die. This imparts the die shape to the extruded metal as it passes through the cavity. The material emerging from the die is known as “extrudate”. The metal endures compressive and shear stress to achieve the die shape.
What is extruded meat?
Extrusion is used in food processing, forcing soft mixed ingredients through an opening in a perforated plate or die designed to produce the required shape. The extruded food is then cut to a specific size by blades. … Food products manufactured using extrusion usually have a high starch content.
What is extruded dog food?
Extrusion works by pushing ingredients through a tube and cooking them at high temperatures and pressures. Once cooked, the food is then coated in fats and oils before being packaged.
Why is extrusion Moulding used?
Extrusion moulding is used to create products with a consistent cross-section. This process is used to make items such as weather stripping, fencing, PVC pipes and gutters. Plastic products can be produced quickly and at a high volume, ensuring cost-efficiency and speed.
What are igneous extrusions?
Sometimes magma can force itself through a crack or fault in the rock at the Earth’s surface. It pours out over the Earth’s surface in a volcanic eruption. This process is called extrusion. The rocks that form from extruded magma are called extrusive igneous rocks. Basalt and pumice are extrusive igneous rocks.
What is an aluminum extrusion?
Aluminum extrusion is a process used to transform aluminum alloy into shapes with a definitive cross-sectional profile for a wide range of uses. The extrusion process takes advantage of the many beneficial physical characteristics aluminum has to offer.
How is pipe extruded?
A pipe extrusion line consists of different parts. An extruder converts raw plastic material into a continuous tubular melt by extrusion through an annular die. The molten pipe then proceeds through a sizing or calibration bench (which adjust its dimensions) to a cooling tank.
What is profile extrusion?
Profile extrusion is the process of making continuous shapes of plastic (not including sheet and film) by extrusion. Molten polymer is forced through a metal die cut into the linear shape of the desired finished article (channel, tube, etc.).
What is a twin screw extruder?
A twin screw extruder is a machine consisting of two intermeshing, co-rotating screws mounted on splined shafts in a closed barrel. The screws are tight and self-wiping, which eliminates stagnant zones over the entire length of the process section. This results in high efficiency and perfect self-cleaning.
Can you extrude steel?
Compared to most other materials, steel is relatively easy to extrude, making it ideal for complex profiles and intricate part shapes. It is also considerably less expensive than many other metals and alloys, making it well-suited to high quantity production runs.
How do extruders work?
Plastic pellets are fed from a hopper into the barrel of the extruder, where the pellets are gradually melted by mechanical energy generated by a turning screw and by heaters arranged along the barrel. The molten polymer is forced through a die, which shapes the extrudate into products such as the examples shown.
What is forward extrusion?
Direct extrusion, also called as forward extrusion, is a type of extrusion that occurs when the direction of flow of metal is the same that movement of ram. A s can be seen in the following figure: Many cross sections are manufactured by this method.
What is a molar extraction?
A tooth extraction is the permanent removal of a tooth from its socket and may be done manually using forceps or surgically. Extraction is recommended when the tooth cannot be saved with other treatments such as root canal treatment and to prevent infection from spreading to other areas of your mouth.