Quick Answer: What Does Extrusion Mean?

What does the word extrusion mean?

Meaning of extrusion in English the process of forming something by forcing or pushing it out, especially through a small opening: …

The fibers are plastic extrusions, similar to optical fiber..

What does extrusion mean in medical terms?

1. A thrusting or forcing out of a normal position. 2. The overeruption or migration of a tooth beyond its normal occlusal position. Medical Dictionary for the Dental Professions © Farlex 2012.

Where is extrusion used?

Extrusion is a metal forming process in which metal or work piece is forced to flow through a die to reduce its cross section or convert it into desire shape. This process is extensively used in pipes and steel rods manufacturing.

What are the types of extrusion?

There are different types of extrusion processes, however, including cold, hot, friction and micro.Cold Extrusion. With cold extrusion, metal is forced through the die while at or near room temperature. … Hot Extrusion. … Friction Extrusion. … Micro Extrusion.

Is extrusion a forging process?

Extrusion and forging they have different purposes. Forging is to make the final shape of the product and extrusion is just… it’s a semi-product to produce.

What is an example of 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.

What does aluminum extrusion mean?

Extrusion is defined as the process of shaping material, such as aluminum, by forcing it to flow through a shaped opening in a die. Extruded material emerges as an elongated piece with the same profile as the die opening.

How many types of extrusion are there?

four typesExtrusion is classified in general into four types. They are: Direct extrusion, indirect extrusion, impact extrusion and hydrostatic extrusion. In extrusion process, the billet is placed in a container, pushed through the die opening using a ram and dummy block. Both ram and billet move.

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 is extrusion ratio?

Extrusion ratio (initial cross sectional area / final cross sectional area) is a measure of magnitude of plastic deformation introduced to the billet [49]. … In direct extrusion, a solid ram forces the billet to flow through a die at the other end of the container.

What is extrusion process?

Extrusion is a process used to create objects of a fixed cross-sectional profile. A material is pushed through a die of the desired cross-section. … The extrusion process can be done with the material hot or cold. Commonly extruded materials include metals, polymers, ceramics, concrete, modelling clay, and foodstuffs.

What does extruded mean?

1 : to force, press, or push out. 2 : to shape (a substance, such as metal or plastic) by forcing through a die. intransitive verb. : to become extruded.

How do extrusion dies work?

Extrusion dies are essentially thick, circular steel disks containing one or more openings to create the desired profile. They are normally constructed from H-13 die steel and heat-treated to withstand the pressure and heat of hot aluminum as it is pushed through the die.

What materials can be used for extrusion?

Typical extrusion materials Typical plastic materials that are used in extrusion include but are not limited to: polyethylene (PE), polypropylene, acetal, acrylic, nylon (polyamides), polystyrene, polyvinyl chloride (PVC), acrylonitrile butadiene styrene (ABS) and polycarbonate.

What are the main extrusion defects?

The common defects in extrusion process are: Improper System Engineering/Installation, Improper Operation, Resin Defects, Improper Materials Addition, Surging, Poor mixing, Melt toughness or fracture, Overheating, Moisture release, Trapped air, Contamination.